| 1 | #line 2 "op.c" |
| 2 | /* op.c |
| 3 | * |
| 4 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 5 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others |
| 6 | * |
| 7 | * You may distribute under the terms of either the GNU General Public |
| 8 | * License or the Artistic License, as specified in the README file. |
| 9 | * |
| 10 | */ |
| 11 | |
| 12 | /* |
| 13 | * 'You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was |
| 14 | * our Mr. Bilbo's first cousin on the mother's side (her mother being the |
| 15 | * youngest of the Old Took's daughters); and Mr. Drogo was his second |
| 16 | * cousin. So Mr. Frodo is his first *and* second cousin, once removed |
| 17 | * either way, as the saying is, if you follow me.' --the Gaffer |
| 18 | * |
| 19 | * [p.23 of _The Lord of the Rings_, I/i: "A Long-Expected Party"] |
| 20 | */ |
| 21 | |
| 22 | /* This file contains the functions that create, manipulate and optimize |
| 23 | * the OP structures that hold a compiled perl program. |
| 24 | * |
| 25 | * A Perl program is compiled into a tree of OPs. Each op contains |
| 26 | * structural pointers (eg to its siblings and the next op in the |
| 27 | * execution sequence), a pointer to the function that would execute the |
| 28 | * op, plus any data specific to that op. For example, an OP_CONST op |
| 29 | * points to the pp_const() function and to an SV containing the constant |
| 30 | * value. When pp_const() is executed, its job is to push that SV onto the |
| 31 | * stack. |
| 32 | * |
| 33 | * OPs are mainly created by the newFOO() functions, which are mainly |
| 34 | * called from the parser (in perly.y) as the code is parsed. For example |
| 35 | * the Perl code $a + $b * $c would cause the equivalent of the following |
| 36 | * to be called (oversimplifying a bit): |
| 37 | * |
| 38 | * newBINOP(OP_ADD, flags, |
| 39 | * newSVREF($a), |
| 40 | * newBINOP(OP_MULTIPLY, flags, newSVREF($b), newSVREF($c)) |
| 41 | * ) |
| 42 | * |
| 43 | * Note that during the build of miniperl, a temporary copy of this file |
| 44 | * is made, called opmini.c. |
| 45 | */ |
| 46 | |
| 47 | /* |
| 48 | Perl's compiler is essentially a 3-pass compiler with interleaved phases: |
| 49 | |
| 50 | A bottom-up pass |
| 51 | A top-down pass |
| 52 | An execution-order pass |
| 53 | |
| 54 | The bottom-up pass is represented by all the "newOP" routines and |
| 55 | the ck_ routines. The bottom-upness is actually driven by yacc. |
| 56 | So at the point that a ck_ routine fires, we have no idea what the |
| 57 | context is, either upward in the syntax tree, or either forward or |
| 58 | backward in the execution order. (The bottom-up parser builds that |
| 59 | part of the execution order it knows about, but if you follow the "next" |
| 60 | links around, you'll find it's actually a closed loop through the |
| 61 | top level node.) |
| 62 | |
| 63 | Whenever the bottom-up parser gets to a node that supplies context to |
| 64 | its components, it invokes that portion of the top-down pass that applies |
| 65 | to that part of the subtree (and marks the top node as processed, so |
| 66 | if a node further up supplies context, it doesn't have to take the |
| 67 | plunge again). As a particular subcase of this, as the new node is |
| 68 | built, it takes all the closed execution loops of its subcomponents |
| 69 | and links them into a new closed loop for the higher level node. But |
| 70 | it's still not the real execution order. |
| 71 | |
| 72 | The actual execution order is not known till we get a grammar reduction |
| 73 | to a top-level unit like a subroutine or file that will be called by |
| 74 | "name" rather than via a "next" pointer. At that point, we can call |
| 75 | into peep() to do that code's portion of the 3rd pass. It has to be |
| 76 | recursive, but it's recursive on basic blocks, not on tree nodes. |
| 77 | */ |
| 78 | |
| 79 | /* To implement user lexical pragmas, there needs to be a way at run time to |
| 80 | get the compile time state of %^H for that block. Storing %^H in every |
| 81 | block (or even COP) would be very expensive, so a different approach is |
| 82 | taken. The (running) state of %^H is serialised into a tree of HE-like |
| 83 | structs. Stores into %^H are chained onto the current leaf as a struct |
| 84 | refcounted_he * with the key and the value. Deletes from %^H are saved |
| 85 | with a value of PL_sv_placeholder. The state of %^H at any point can be |
| 86 | turned back into a regular HV by walking back up the tree from that point's |
| 87 | leaf, ignoring any key you've already seen (placeholder or not), storing |
| 88 | the rest into the HV structure, then removing the placeholders. Hence |
| 89 | memory is only used to store the %^H deltas from the enclosing COP, rather |
| 90 | than the entire %^H on each COP. |
| 91 | |
| 92 | To cause actions on %^H to write out the serialisation records, it has |
| 93 | magic type 'H'. This magic (itself) does nothing, but its presence causes |
| 94 | the values to gain magic type 'h', which has entries for set and clear. |
| 95 | C<Perl_magic_sethint> updates C<PL_compiling.cop_hints_hash> with a store |
| 96 | record, with deletes written by C<Perl_magic_clearhint>. C<SAVEHINTS> |
| 97 | saves the current C<PL_compiling.cop_hints_hash> on the save stack, so that |
| 98 | it will be correctly restored when any inner compiling scope is exited. |
| 99 | */ |
| 100 | |
| 101 | #include "EXTERN.h" |
| 102 | #define PERL_IN_OP_C |
| 103 | #include "perl.h" |
| 104 | #include "keywords.h" |
| 105 | |
| 106 | #define CALL_PEEP(o) PL_peepp(aTHX_ o) |
| 107 | #define CALL_RPEEP(o) PL_rpeepp(aTHX_ o) |
| 108 | #define CALL_OPFREEHOOK(o) if (PL_opfreehook) PL_opfreehook(aTHX_ o) |
| 109 | |
| 110 | #if defined(PL_OP_SLAB_ALLOC) |
| 111 | |
| 112 | #ifdef PERL_DEBUG_READONLY_OPS |
| 113 | # define PERL_SLAB_SIZE 4096 |
| 114 | # include <sys/mman.h> |
| 115 | #endif |
| 116 | |
| 117 | #ifndef PERL_SLAB_SIZE |
| 118 | #define PERL_SLAB_SIZE 2048 |
| 119 | #endif |
| 120 | |
| 121 | void * |
| 122 | Perl_Slab_Alloc(pTHX_ size_t sz) |
| 123 | { |
| 124 | dVAR; |
| 125 | /* |
| 126 | * To make incrementing use count easy PL_OpSlab is an I32 * |
| 127 | * To make inserting the link to slab PL_OpPtr is I32 ** |
| 128 | * So compute size in units of sizeof(I32 *) as that is how Pl_OpPtr increments |
| 129 | * Add an overhead for pointer to slab and round up as a number of pointers |
| 130 | */ |
| 131 | sz = (sz + 2*sizeof(I32 *) -1)/sizeof(I32 *); |
| 132 | if ((PL_OpSpace -= sz) < 0) { |
| 133 | #ifdef PERL_DEBUG_READONLY_OPS |
| 134 | /* We need to allocate chunk by chunk so that we can control the VM |
| 135 | mapping */ |
| 136 | PL_OpPtr = (I32**) mmap(0, PERL_SLAB_SIZE*sizeof(I32*), PROT_READ|PROT_WRITE, |
| 137 | MAP_ANON|MAP_PRIVATE, -1, 0); |
| 138 | |
| 139 | DEBUG_m(PerlIO_printf(Perl_debug_log, "mapped %lu at %p\n", |
| 140 | (unsigned long) PERL_SLAB_SIZE*sizeof(I32*), |
| 141 | PL_OpPtr)); |
| 142 | if(PL_OpPtr == MAP_FAILED) { |
| 143 | perror("mmap failed"); |
| 144 | abort(); |
| 145 | } |
| 146 | #else |
| 147 | |
| 148 | PL_OpPtr = (I32 **) PerlMemShared_calloc(PERL_SLAB_SIZE,sizeof(I32*)); |
| 149 | #endif |
| 150 | if (!PL_OpPtr) { |
| 151 | return NULL; |
| 152 | } |
| 153 | /* We reserve the 0'th I32 sized chunk as a use count */ |
| 154 | PL_OpSlab = (I32 *) PL_OpPtr; |
| 155 | /* Reduce size by the use count word, and by the size we need. |
| 156 | * Latter is to mimic the '-=' in the if() above |
| 157 | */ |
| 158 | PL_OpSpace = PERL_SLAB_SIZE - (sizeof(I32)+sizeof(I32 **)-1)/sizeof(I32 **) - sz; |
| 159 | /* Allocation pointer starts at the top. |
| 160 | Theory: because we build leaves before trunk allocating at end |
| 161 | means that at run time access is cache friendly upward |
| 162 | */ |
| 163 | PL_OpPtr += PERL_SLAB_SIZE; |
| 164 | |
| 165 | #ifdef PERL_DEBUG_READONLY_OPS |
| 166 | /* We remember this slab. */ |
| 167 | /* This implementation isn't efficient, but it is simple. */ |
| 168 | PL_slabs = (I32**) realloc(PL_slabs, sizeof(I32**) * (PL_slab_count + 1)); |
| 169 | PL_slabs[PL_slab_count++] = PL_OpSlab; |
| 170 | DEBUG_m(PerlIO_printf(Perl_debug_log, "Allocate %p\n", PL_OpSlab)); |
| 171 | #endif |
| 172 | } |
| 173 | assert( PL_OpSpace >= 0 ); |
| 174 | /* Move the allocation pointer down */ |
| 175 | PL_OpPtr -= sz; |
| 176 | assert( PL_OpPtr > (I32 **) PL_OpSlab ); |
| 177 | *PL_OpPtr = PL_OpSlab; /* Note which slab it belongs to */ |
| 178 | (*PL_OpSlab)++; /* Increment use count of slab */ |
| 179 | assert( PL_OpPtr+sz <= ((I32 **) PL_OpSlab + PERL_SLAB_SIZE) ); |
| 180 | assert( *PL_OpSlab > 0 ); |
| 181 | return (void *)(PL_OpPtr + 1); |
| 182 | } |
| 183 | |
| 184 | #ifdef PERL_DEBUG_READONLY_OPS |
| 185 | void |
| 186 | Perl_pending_Slabs_to_ro(pTHX) { |
| 187 | /* Turn all the allocated op slabs read only. */ |
| 188 | U32 count = PL_slab_count; |
| 189 | I32 **const slabs = PL_slabs; |
| 190 | |
| 191 | /* Reset the array of pending OP slabs, as we're about to turn this lot |
| 192 | read only. Also, do it ahead of the loop in case the warn triggers, |
| 193 | and a warn handler has an eval */ |
| 194 | |
| 195 | PL_slabs = NULL; |
| 196 | PL_slab_count = 0; |
| 197 | |
| 198 | /* Force a new slab for any further allocation. */ |
| 199 | PL_OpSpace = 0; |
| 200 | |
| 201 | while (count--) { |
| 202 | void *const start = slabs[count]; |
| 203 | const size_t size = PERL_SLAB_SIZE* sizeof(I32*); |
| 204 | if(mprotect(start, size, PROT_READ)) { |
| 205 | Perl_warn(aTHX_ "mprotect for %p %lu failed with %d", |
| 206 | start, (unsigned long) size, errno); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | free(slabs); |
| 211 | } |
| 212 | |
| 213 | STATIC void |
| 214 | S_Slab_to_rw(pTHX_ void *op) |
| 215 | { |
| 216 | I32 * const * const ptr = (I32 **) op; |
| 217 | I32 * const slab = ptr[-1]; |
| 218 | |
| 219 | PERL_ARGS_ASSERT_SLAB_TO_RW; |
| 220 | |
| 221 | assert( ptr-1 > (I32 **) slab ); |
| 222 | assert( ptr < ( (I32 **) slab + PERL_SLAB_SIZE) ); |
| 223 | assert( *slab > 0 ); |
| 224 | if(mprotect(slab, PERL_SLAB_SIZE*sizeof(I32*), PROT_READ|PROT_WRITE)) { |
| 225 | Perl_warn(aTHX_ "mprotect RW for %p %lu failed with %d", |
| 226 | slab, (unsigned long) PERL_SLAB_SIZE*sizeof(I32*), errno); |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | OP * |
| 231 | Perl_op_refcnt_inc(pTHX_ OP *o) |
| 232 | { |
| 233 | if(o) { |
| 234 | Slab_to_rw(o); |
| 235 | ++o->op_targ; |
| 236 | } |
| 237 | return o; |
| 238 | |
| 239 | } |
| 240 | |
| 241 | PADOFFSET |
| 242 | Perl_op_refcnt_dec(pTHX_ OP *o) |
| 243 | { |
| 244 | PERL_ARGS_ASSERT_OP_REFCNT_DEC; |
| 245 | Slab_to_rw(o); |
| 246 | return --o->op_targ; |
| 247 | } |
| 248 | #else |
| 249 | # define Slab_to_rw(op) |
| 250 | #endif |
| 251 | |
| 252 | void |
| 253 | Perl_Slab_Free(pTHX_ void *op) |
| 254 | { |
| 255 | I32 * const * const ptr = (I32 **) op; |
| 256 | I32 * const slab = ptr[-1]; |
| 257 | PERL_ARGS_ASSERT_SLAB_FREE; |
| 258 | assert( ptr-1 > (I32 **) slab ); |
| 259 | assert( ptr < ( (I32 **) slab + PERL_SLAB_SIZE) ); |
| 260 | assert( *slab > 0 ); |
| 261 | Slab_to_rw(op); |
| 262 | if (--(*slab) == 0) { |
| 263 | # ifdef NETWARE |
| 264 | # define PerlMemShared PerlMem |
| 265 | # endif |
| 266 | |
| 267 | #ifdef PERL_DEBUG_READONLY_OPS |
| 268 | U32 count = PL_slab_count; |
| 269 | /* Need to remove this slab from our list of slabs */ |
| 270 | if (count) { |
| 271 | while (count--) { |
| 272 | if (PL_slabs[count] == slab) { |
| 273 | dVAR; |
| 274 | /* Found it. Move the entry at the end to overwrite it. */ |
| 275 | DEBUG_m(PerlIO_printf(Perl_debug_log, |
| 276 | "Deallocate %p by moving %p from %lu to %lu\n", |
| 277 | PL_OpSlab, |
| 278 | PL_slabs[PL_slab_count - 1], |
| 279 | PL_slab_count, count)); |
| 280 | PL_slabs[count] = PL_slabs[--PL_slab_count]; |
| 281 | /* Could realloc smaller at this point, but probably not |
| 282 | worth it. */ |
| 283 | if(munmap(slab, PERL_SLAB_SIZE*sizeof(I32*))) { |
| 284 | perror("munmap failed"); |
| 285 | abort(); |
| 286 | } |
| 287 | break; |
| 288 | } |
| 289 | } |
| 290 | } |
| 291 | #else |
| 292 | PerlMemShared_free(slab); |
| 293 | #endif |
| 294 | if (slab == PL_OpSlab) { |
| 295 | PL_OpSpace = 0; |
| 296 | } |
| 297 | } |
| 298 | } |
| 299 | #endif |
| 300 | /* |
| 301 | * In the following definition, the ", (OP*)0" is just to make the compiler |
| 302 | * think the expression is of the right type: croak actually does a Siglongjmp. |
| 303 | */ |
| 304 | #define CHECKOP(type,o) \ |
| 305 | ((PL_op_mask && PL_op_mask[type]) \ |
| 306 | ? ( op_free((OP*)o), \ |
| 307 | Perl_croak(aTHX_ "'%s' trapped by operation mask", PL_op_desc[type]), \ |
| 308 | (OP*)0 ) \ |
| 309 | : PL_check[type](aTHX_ (OP*)o)) |
| 310 | |
| 311 | #define RETURN_UNLIMITED_NUMBER (PERL_INT_MAX / 2) |
| 312 | |
| 313 | STATIC const char* |
| 314 | S_gv_ename(pTHX_ GV *gv) |
| 315 | { |
| 316 | SV* const tmpsv = sv_newmortal(); |
| 317 | |
| 318 | PERL_ARGS_ASSERT_GV_ENAME; |
| 319 | |
| 320 | gv_efullname3(tmpsv, gv, NULL); |
| 321 | return SvPV_nolen_const(tmpsv); |
| 322 | } |
| 323 | |
| 324 | STATIC OP * |
| 325 | S_no_fh_allowed(pTHX_ OP *o) |
| 326 | { |
| 327 | PERL_ARGS_ASSERT_NO_FH_ALLOWED; |
| 328 | |
| 329 | yyerror(Perl_form(aTHX_ "Missing comma after first argument to %s function", |
| 330 | OP_DESC(o))); |
| 331 | return o; |
| 332 | } |
| 333 | |
| 334 | STATIC OP * |
| 335 | S_too_few_arguments(pTHX_ OP *o, const char *name) |
| 336 | { |
| 337 | PERL_ARGS_ASSERT_TOO_FEW_ARGUMENTS; |
| 338 | |
| 339 | yyerror(Perl_form(aTHX_ "Not enough arguments for %s", name)); |
| 340 | return o; |
| 341 | } |
| 342 | |
| 343 | STATIC OP * |
| 344 | S_too_many_arguments(pTHX_ OP *o, const char *name) |
| 345 | { |
| 346 | PERL_ARGS_ASSERT_TOO_MANY_ARGUMENTS; |
| 347 | |
| 348 | yyerror(Perl_form(aTHX_ "Too many arguments for %s", name)); |
| 349 | return o; |
| 350 | } |
| 351 | |
| 352 | STATIC void |
| 353 | S_bad_type(pTHX_ I32 n, const char *t, const char *name, const OP *kid) |
| 354 | { |
| 355 | PERL_ARGS_ASSERT_BAD_TYPE; |
| 356 | |
| 357 | yyerror(Perl_form(aTHX_ "Type of arg %d to %s must be %s (not %s)", |
| 358 | (int)n, name, t, OP_DESC(kid))); |
| 359 | } |
| 360 | |
| 361 | STATIC void |
| 362 | S_no_bareword_allowed(pTHX_ const OP *o) |
| 363 | { |
| 364 | PERL_ARGS_ASSERT_NO_BAREWORD_ALLOWED; |
| 365 | |
| 366 | if (PL_madskills) |
| 367 | return; /* various ok barewords are hidden in extra OP_NULL */ |
| 368 | qerror(Perl_mess(aTHX_ |
| 369 | "Bareword \"%"SVf"\" not allowed while \"strict subs\" in use", |
| 370 | SVfARG(cSVOPo_sv))); |
| 371 | } |
| 372 | |
| 373 | /* "register" allocation */ |
| 374 | |
| 375 | PADOFFSET |
| 376 | Perl_allocmy(pTHX_ const char *const name, const STRLEN len, const U32 flags) |
| 377 | { |
| 378 | dVAR; |
| 379 | PADOFFSET off; |
| 380 | const bool is_our = (PL_parser->in_my == KEY_our); |
| 381 | |
| 382 | PERL_ARGS_ASSERT_ALLOCMY; |
| 383 | |
| 384 | if (flags) |
| 385 | Perl_croak(aTHX_ "panic: allocmy illegal flag bits 0x%" UVxf, |
| 386 | (UV)flags); |
| 387 | |
| 388 | /* Until we're using the length for real, cross check that we're being |
| 389 | told the truth. */ |
| 390 | assert(strlen(name) == len); |
| 391 | |
| 392 | /* complain about "my $<special_var>" etc etc */ |
| 393 | if (len && |
| 394 | !(is_our || |
| 395 | isALPHA(name[1]) || |
| 396 | (USE_UTF8_IN_NAMES && UTF8_IS_START(name[1])) || |
| 397 | (name[1] == '_' && (*name == '$' || len > 2)))) |
| 398 | { |
| 399 | /* name[2] is true if strlen(name) > 2 */ |
| 400 | if (!isPRINT(name[1]) || strchr("\t\n\r\f", name[1])) { |
| 401 | yyerror(Perl_form(aTHX_ "Can't use global %c^%c%.*s in \"%s\"", |
| 402 | name[0], toCTRL(name[1]), (int)(len - 2), name + 2, |
| 403 | PL_parser->in_my == KEY_state ? "state" : "my")); |
| 404 | } else { |
| 405 | yyerror(Perl_form(aTHX_ "Can't use global %.*s in \"%s\"", (int) len, name, |
| 406 | PL_parser->in_my == KEY_state ? "state" : "my")); |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | /* allocate a spare slot and store the name in that slot */ |
| 411 | |
| 412 | off = pad_add_name(name, len, |
| 413 | is_our ? padadd_OUR : |
| 414 | PL_parser->in_my == KEY_state ? padadd_STATE : 0, |
| 415 | PL_parser->in_my_stash, |
| 416 | (is_our |
| 417 | /* $_ is always in main::, even with our */ |
| 418 | ? (PL_curstash && !strEQ(name,"$_") ? PL_curstash : PL_defstash) |
| 419 | : NULL |
| 420 | ) |
| 421 | ); |
| 422 | /* anon sub prototypes contains state vars should always be cloned, |
| 423 | * otherwise the state var would be shared between anon subs */ |
| 424 | |
| 425 | if (PL_parser->in_my == KEY_state && CvANON(PL_compcv)) |
| 426 | CvCLONE_on(PL_compcv); |
| 427 | |
| 428 | return off; |
| 429 | } |
| 430 | |
| 431 | /* free the body of an op without examining its contents. |
| 432 | * Always use this rather than FreeOp directly */ |
| 433 | |
| 434 | static void |
| 435 | S_op_destroy(pTHX_ OP *o) |
| 436 | { |
| 437 | if (o->op_latefree) { |
| 438 | o->op_latefreed = 1; |
| 439 | return; |
| 440 | } |
| 441 | FreeOp(o); |
| 442 | } |
| 443 | |
| 444 | #ifdef USE_ITHREADS |
| 445 | # define forget_pmop(a,b) S_forget_pmop(aTHX_ a,b) |
| 446 | #else |
| 447 | # define forget_pmop(a,b) S_forget_pmop(aTHX_ a) |
| 448 | #endif |
| 449 | |
| 450 | /* Destructor */ |
| 451 | |
| 452 | void |
| 453 | Perl_op_free(pTHX_ OP *o) |
| 454 | { |
| 455 | dVAR; |
| 456 | OPCODE type; |
| 457 | |
| 458 | if (!o) |
| 459 | return; |
| 460 | if (o->op_latefreed) { |
| 461 | if (o->op_latefree) |
| 462 | return; |
| 463 | goto do_free; |
| 464 | } |
| 465 | |
| 466 | type = o->op_type; |
| 467 | if (o->op_private & OPpREFCOUNTED) { |
| 468 | switch (type) { |
| 469 | case OP_LEAVESUB: |
| 470 | case OP_LEAVESUBLV: |
| 471 | case OP_LEAVEEVAL: |
| 472 | case OP_LEAVE: |
| 473 | case OP_SCOPE: |
| 474 | case OP_LEAVEWRITE: |
| 475 | { |
| 476 | PADOFFSET refcnt; |
| 477 | OP_REFCNT_LOCK; |
| 478 | refcnt = OpREFCNT_dec(o); |
| 479 | OP_REFCNT_UNLOCK; |
| 480 | if (refcnt) { |
| 481 | /* Need to find and remove any pattern match ops from the list |
| 482 | we maintain for reset(). */ |
| 483 | find_and_forget_pmops(o); |
| 484 | return; |
| 485 | } |
| 486 | } |
| 487 | break; |
| 488 | default: |
| 489 | break; |
| 490 | } |
| 491 | } |
| 492 | |
| 493 | /* Call the op_free hook if it has been set. Do it now so that it's called |
| 494 | * at the right time for refcounted ops, but still before all of the kids |
| 495 | * are freed. */ |
| 496 | CALL_OPFREEHOOK(o); |
| 497 | |
| 498 | if (o->op_flags & OPf_KIDS) { |
| 499 | register OP *kid, *nextkid; |
| 500 | for (kid = cUNOPo->op_first; kid; kid = nextkid) { |
| 501 | nextkid = kid->op_sibling; /* Get before next freeing kid */ |
| 502 | op_free(kid); |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | #ifdef PERL_DEBUG_READONLY_OPS |
| 507 | Slab_to_rw(o); |
| 508 | #endif |
| 509 | |
| 510 | /* COP* is not cleared by op_clear() so that we may track line |
| 511 | * numbers etc even after null() */ |
| 512 | if (type == OP_NEXTSTATE || type == OP_DBSTATE |
| 513 | || (type == OP_NULL /* the COP might have been null'ed */ |
| 514 | && ((OPCODE)o->op_targ == OP_NEXTSTATE |
| 515 | || (OPCODE)o->op_targ == OP_DBSTATE))) { |
| 516 | cop_free((COP*)o); |
| 517 | } |
| 518 | |
| 519 | if (type == OP_NULL) |
| 520 | type = (OPCODE)o->op_targ; |
| 521 | |
| 522 | op_clear(o); |
| 523 | if (o->op_latefree) { |
| 524 | o->op_latefreed = 1; |
| 525 | return; |
| 526 | } |
| 527 | do_free: |
| 528 | FreeOp(o); |
| 529 | #ifdef DEBUG_LEAKING_SCALARS |
| 530 | if (PL_op == o) |
| 531 | PL_op = NULL; |
| 532 | #endif |
| 533 | } |
| 534 | |
| 535 | void |
| 536 | Perl_op_clear(pTHX_ OP *o) |
| 537 | { |
| 538 | |
| 539 | dVAR; |
| 540 | |
| 541 | PERL_ARGS_ASSERT_OP_CLEAR; |
| 542 | |
| 543 | #ifdef PERL_MAD |
| 544 | /* if (o->op_madprop && o->op_madprop->mad_next) |
| 545 | abort(); */ |
| 546 | /* FIXME for MAD - if I uncomment these two lines t/op/pack.t fails with |
| 547 | "modification of a read only value" for a reason I can't fathom why. |
| 548 | It's the "" stringification of $_, where $_ was set to '' in a foreach |
| 549 | loop, but it defies simplification into a small test case. |
| 550 | However, commenting them out has caused ext/List/Util/t/weak.t to fail |
| 551 | the last test. */ |
| 552 | /* |
| 553 | mad_free(o->op_madprop); |
| 554 | o->op_madprop = 0; |
| 555 | */ |
| 556 | #endif |
| 557 | |
| 558 | retry: |
| 559 | switch (o->op_type) { |
| 560 | case OP_NULL: /* Was holding old type, if any. */ |
| 561 | if (PL_madskills && o->op_targ != OP_NULL) { |
| 562 | o->op_type = (Optype)o->op_targ; |
| 563 | o->op_targ = 0; |
| 564 | goto retry; |
| 565 | } |
| 566 | case OP_ENTERTRY: |
| 567 | case OP_ENTEREVAL: /* Was holding hints. */ |
| 568 | o->op_targ = 0; |
| 569 | break; |
| 570 | default: |
| 571 | if (!(o->op_flags & OPf_REF) |
| 572 | || (PL_check[o->op_type] != Perl_ck_ftst)) |
| 573 | break; |
| 574 | /* FALL THROUGH */ |
| 575 | case OP_GVSV: |
| 576 | case OP_GV: |
| 577 | case OP_AELEMFAST: |
| 578 | if (! (o->op_type == OP_AELEMFAST && o->op_flags & OPf_SPECIAL)) { |
| 579 | /* not an OP_PADAV replacement */ |
| 580 | GV *gv = (o->op_type == OP_GV || o->op_type == OP_GVSV) |
| 581 | #ifdef USE_ITHREADS |
| 582 | && PL_curpad |
| 583 | #endif |
| 584 | ? cGVOPo_gv : NULL; |
| 585 | /* It's possible during global destruction that the GV is freed |
| 586 | before the optree. Whilst the SvREFCNT_inc is happy to bump from |
| 587 | 0 to 1 on a freed SV, the corresponding SvREFCNT_dec from 1 to 0 |
| 588 | will trigger an assertion failure, because the entry to sv_clear |
| 589 | checks that the scalar is not already freed. A check of for |
| 590 | !SvIS_FREED(gv) turns out to be invalid, because during global |
| 591 | destruction the reference count can be forced down to zero |
| 592 | (with SVf_BREAK set). In which case raising to 1 and then |
| 593 | dropping to 0 triggers cleanup before it should happen. I |
| 594 | *think* that this might actually be a general, systematic, |
| 595 | weakness of the whole idea of SVf_BREAK, in that code *is* |
| 596 | allowed to raise and lower references during global destruction, |
| 597 | so any *valid* code that happens to do this during global |
| 598 | destruction might well trigger premature cleanup. */ |
| 599 | bool still_valid = gv && SvREFCNT(gv); |
| 600 | |
| 601 | if (still_valid) |
| 602 | SvREFCNT_inc_simple_void(gv); |
| 603 | #ifdef USE_ITHREADS |
| 604 | if (cPADOPo->op_padix > 0) { |
| 605 | /* No GvIN_PAD_off(cGVOPo_gv) here, because other references |
| 606 | * may still exist on the pad */ |
| 607 | pad_swipe(cPADOPo->op_padix, TRUE); |
| 608 | cPADOPo->op_padix = 0; |
| 609 | } |
| 610 | #else |
| 611 | SvREFCNT_dec(cSVOPo->op_sv); |
| 612 | cSVOPo->op_sv = NULL; |
| 613 | #endif |
| 614 | if (still_valid) { |
| 615 | int try_downgrade = SvREFCNT(gv) == 2; |
| 616 | SvREFCNT_dec(gv); |
| 617 | if (try_downgrade) |
| 618 | gv_try_downgrade(gv); |
| 619 | } |
| 620 | } |
| 621 | break; |
| 622 | case OP_METHOD_NAMED: |
| 623 | case OP_CONST: |
| 624 | case OP_HINTSEVAL: |
| 625 | SvREFCNT_dec(cSVOPo->op_sv); |
| 626 | cSVOPo->op_sv = NULL; |
| 627 | #ifdef USE_ITHREADS |
| 628 | /** Bug #15654 |
| 629 | Even if op_clear does a pad_free for the target of the op, |
| 630 | pad_free doesn't actually remove the sv that exists in the pad; |
| 631 | instead it lives on. This results in that it could be reused as |
| 632 | a target later on when the pad was reallocated. |
| 633 | **/ |
| 634 | if(o->op_targ) { |
| 635 | pad_swipe(o->op_targ,1); |
| 636 | o->op_targ = 0; |
| 637 | } |
| 638 | #endif |
| 639 | break; |
| 640 | case OP_GOTO: |
| 641 | case OP_NEXT: |
| 642 | case OP_LAST: |
| 643 | case OP_REDO: |
| 644 | if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS)) |
| 645 | break; |
| 646 | /* FALL THROUGH */ |
| 647 | case OP_TRANS: |
| 648 | if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) { |
| 649 | #ifdef USE_ITHREADS |
| 650 | if (cPADOPo->op_padix > 0) { |
| 651 | pad_swipe(cPADOPo->op_padix, TRUE); |
| 652 | cPADOPo->op_padix = 0; |
| 653 | } |
| 654 | #else |
| 655 | SvREFCNT_dec(cSVOPo->op_sv); |
| 656 | cSVOPo->op_sv = NULL; |
| 657 | #endif |
| 658 | } |
| 659 | else { |
| 660 | PerlMemShared_free(cPVOPo->op_pv); |
| 661 | cPVOPo->op_pv = NULL; |
| 662 | } |
| 663 | break; |
| 664 | case OP_SUBST: |
| 665 | op_free(cPMOPo->op_pmreplrootu.op_pmreplroot); |
| 666 | goto clear_pmop; |
| 667 | case OP_PUSHRE: |
| 668 | #ifdef USE_ITHREADS |
| 669 | if (cPMOPo->op_pmreplrootu.op_pmtargetoff) { |
| 670 | /* No GvIN_PAD_off here, because other references may still |
| 671 | * exist on the pad */ |
| 672 | pad_swipe(cPMOPo->op_pmreplrootu.op_pmtargetoff, TRUE); |
| 673 | } |
| 674 | #else |
| 675 | SvREFCNT_dec(MUTABLE_SV(cPMOPo->op_pmreplrootu.op_pmtargetgv)); |
| 676 | #endif |
| 677 | /* FALL THROUGH */ |
| 678 | case OP_MATCH: |
| 679 | case OP_QR: |
| 680 | clear_pmop: |
| 681 | forget_pmop(cPMOPo, 1); |
| 682 | cPMOPo->op_pmreplrootu.op_pmreplroot = NULL; |
| 683 | /* we use the same protection as the "SAFE" version of the PM_ macros |
| 684 | * here since sv_clean_all might release some PMOPs |
| 685 | * after PL_regex_padav has been cleared |
| 686 | * and the clearing of PL_regex_padav needs to |
| 687 | * happen before sv_clean_all |
| 688 | */ |
| 689 | #ifdef USE_ITHREADS |
| 690 | if(PL_regex_pad) { /* We could be in destruction */ |
| 691 | const IV offset = (cPMOPo)->op_pmoffset; |
| 692 | ReREFCNT_dec(PM_GETRE(cPMOPo)); |
| 693 | PL_regex_pad[offset] = &PL_sv_undef; |
| 694 | sv_catpvn_nomg(PL_regex_pad[0], (const char *)&offset, |
| 695 | sizeof(offset)); |
| 696 | } |
| 697 | #else |
| 698 | ReREFCNT_dec(PM_GETRE(cPMOPo)); |
| 699 | PM_SETRE(cPMOPo, NULL); |
| 700 | #endif |
| 701 | |
| 702 | break; |
| 703 | } |
| 704 | |
| 705 | if (o->op_targ > 0) { |
| 706 | pad_free(o->op_targ); |
| 707 | o->op_targ = 0; |
| 708 | } |
| 709 | } |
| 710 | |
| 711 | STATIC void |
| 712 | S_cop_free(pTHX_ COP* cop) |
| 713 | { |
| 714 | PERL_ARGS_ASSERT_COP_FREE; |
| 715 | |
| 716 | CopFILE_free(cop); |
| 717 | CopSTASH_free(cop); |
| 718 | if (! specialWARN(cop->cop_warnings)) |
| 719 | PerlMemShared_free(cop->cop_warnings); |
| 720 | Perl_refcounted_he_free(aTHX_ cop->cop_hints_hash); |
| 721 | } |
| 722 | |
| 723 | STATIC void |
| 724 | S_forget_pmop(pTHX_ PMOP *const o |
| 725 | #ifdef USE_ITHREADS |
| 726 | , U32 flags |
| 727 | #endif |
| 728 | ) |
| 729 | { |
| 730 | HV * const pmstash = PmopSTASH(o); |
| 731 | |
| 732 | PERL_ARGS_ASSERT_FORGET_PMOP; |
| 733 | |
| 734 | if (pmstash && !SvIS_FREED(pmstash)) { |
| 735 | MAGIC * const mg = mg_find((const SV *)pmstash, PERL_MAGIC_symtab); |
| 736 | if (mg) { |
| 737 | PMOP **const array = (PMOP**) mg->mg_ptr; |
| 738 | U32 count = mg->mg_len / sizeof(PMOP**); |
| 739 | U32 i = count; |
| 740 | |
| 741 | while (i--) { |
| 742 | if (array[i] == o) { |
| 743 | /* Found it. Move the entry at the end to overwrite it. */ |
| 744 | array[i] = array[--count]; |
| 745 | mg->mg_len = count * sizeof(PMOP**); |
| 746 | /* Could realloc smaller at this point always, but probably |
| 747 | not worth it. Probably worth free()ing if we're the |
| 748 | last. */ |
| 749 | if(!count) { |
| 750 | Safefree(mg->mg_ptr); |
| 751 | mg->mg_ptr = NULL; |
| 752 | } |
| 753 | break; |
| 754 | } |
| 755 | } |
| 756 | } |
| 757 | } |
| 758 | if (PL_curpm == o) |
| 759 | PL_curpm = NULL; |
| 760 | #ifdef USE_ITHREADS |
| 761 | if (flags) |
| 762 | PmopSTASH_free(o); |
| 763 | #endif |
| 764 | } |
| 765 | |
| 766 | STATIC void |
| 767 | S_find_and_forget_pmops(pTHX_ OP *o) |
| 768 | { |
| 769 | PERL_ARGS_ASSERT_FIND_AND_FORGET_PMOPS; |
| 770 | |
| 771 | if (o->op_flags & OPf_KIDS) { |
| 772 | OP *kid = cUNOPo->op_first; |
| 773 | while (kid) { |
| 774 | switch (kid->op_type) { |
| 775 | case OP_SUBST: |
| 776 | case OP_PUSHRE: |
| 777 | case OP_MATCH: |
| 778 | case OP_QR: |
| 779 | forget_pmop((PMOP*)kid, 0); |
| 780 | } |
| 781 | find_and_forget_pmops(kid); |
| 782 | kid = kid->op_sibling; |
| 783 | } |
| 784 | } |
| 785 | } |
| 786 | |
| 787 | void |
| 788 | Perl_op_null(pTHX_ OP *o) |
| 789 | { |
| 790 | dVAR; |
| 791 | |
| 792 | PERL_ARGS_ASSERT_OP_NULL; |
| 793 | |
| 794 | if (o->op_type == OP_NULL) |
| 795 | return; |
| 796 | if (!PL_madskills) |
| 797 | op_clear(o); |
| 798 | o->op_targ = o->op_type; |
| 799 | o->op_type = OP_NULL; |
| 800 | o->op_ppaddr = PL_ppaddr[OP_NULL]; |
| 801 | } |
| 802 | |
| 803 | void |
| 804 | Perl_op_refcnt_lock(pTHX) |
| 805 | { |
| 806 | dVAR; |
| 807 | PERL_UNUSED_CONTEXT; |
| 808 | OP_REFCNT_LOCK; |
| 809 | } |
| 810 | |
| 811 | void |
| 812 | Perl_op_refcnt_unlock(pTHX) |
| 813 | { |
| 814 | dVAR; |
| 815 | PERL_UNUSED_CONTEXT; |
| 816 | OP_REFCNT_UNLOCK; |
| 817 | } |
| 818 | |
| 819 | /* Contextualizers */ |
| 820 | |
| 821 | /* |
| 822 | =for apidoc Am|OP *|op_contextualize|OP *o|I32 context |
| 823 | |
| 824 | Applies a syntactic context to an op tree representing an expression. |
| 825 | I<o> is the op tree, and I<context> must be C<G_SCALAR>, C<G_ARRAY>, |
| 826 | or C<G_VOID> to specify the context to apply. The modified op tree |
| 827 | is returned. |
| 828 | |
| 829 | =cut |
| 830 | */ |
| 831 | |
| 832 | OP * |
| 833 | Perl_op_contextualize(pTHX_ OP *o, I32 context) |
| 834 | { |
| 835 | PERL_ARGS_ASSERT_OP_CONTEXTUALIZE; |
| 836 | switch (context) { |
| 837 | case G_SCALAR: return scalar(o); |
| 838 | case G_ARRAY: return list(o); |
| 839 | case G_VOID: return scalarvoid(o); |
| 840 | default: |
| 841 | Perl_croak(aTHX_ "panic: op_contextualize bad context"); |
| 842 | return o; |
| 843 | } |
| 844 | } |
| 845 | |
| 846 | /* |
| 847 | =head1 Optree Manipulation Functions |
| 848 | |
| 849 | =for apidoc Am|OP*|op_linklist|OP *o |
| 850 | This function is the implementation of the L</LINKLIST> macro. It should |
| 851 | not be called directly. |
| 852 | |
| 853 | =cut |
| 854 | */ |
| 855 | |
| 856 | OP * |
| 857 | Perl_op_linklist(pTHX_ OP *o) |
| 858 | { |
| 859 | OP *first; |
| 860 | |
| 861 | PERL_ARGS_ASSERT_OP_LINKLIST; |
| 862 | |
| 863 | if (o->op_next) |
| 864 | return o->op_next; |
| 865 | |
| 866 | /* establish postfix order */ |
| 867 | first = cUNOPo->op_first; |
| 868 | if (first) { |
| 869 | register OP *kid; |
| 870 | o->op_next = LINKLIST(first); |
| 871 | kid = first; |
| 872 | for (;;) { |
| 873 | if (kid->op_sibling) { |
| 874 | kid->op_next = LINKLIST(kid->op_sibling); |
| 875 | kid = kid->op_sibling; |
| 876 | } else { |
| 877 | kid->op_next = o; |
| 878 | break; |
| 879 | } |
| 880 | } |
| 881 | } |
| 882 | else |
| 883 | o->op_next = o; |
| 884 | |
| 885 | return o->op_next; |
| 886 | } |
| 887 | |
| 888 | static OP * |
| 889 | S_scalarkids(pTHX_ OP *o) |
| 890 | { |
| 891 | if (o && o->op_flags & OPf_KIDS) { |
| 892 | OP *kid; |
| 893 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 894 | scalar(kid); |
| 895 | } |
| 896 | return o; |
| 897 | } |
| 898 | |
| 899 | STATIC OP * |
| 900 | S_scalarboolean(pTHX_ OP *o) |
| 901 | { |
| 902 | dVAR; |
| 903 | |
| 904 | PERL_ARGS_ASSERT_SCALARBOOLEAN; |
| 905 | |
| 906 | if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) { |
| 907 | if (ckWARN(WARN_SYNTAX)) { |
| 908 | const line_t oldline = CopLINE(PL_curcop); |
| 909 | |
| 910 | if (PL_parser && PL_parser->copline != NOLINE) |
| 911 | CopLINE_set(PL_curcop, PL_parser->copline); |
| 912 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Found = in conditional, should be =="); |
| 913 | CopLINE_set(PL_curcop, oldline); |
| 914 | } |
| 915 | } |
| 916 | return scalar(o); |
| 917 | } |
| 918 | |
| 919 | OP * |
| 920 | Perl_scalar(pTHX_ OP *o) |
| 921 | { |
| 922 | dVAR; |
| 923 | OP *kid; |
| 924 | |
| 925 | /* assumes no premature commitment */ |
| 926 | if (!o || (PL_parser && PL_parser->error_count) |
| 927 | || (o->op_flags & OPf_WANT) |
| 928 | || o->op_type == OP_RETURN) |
| 929 | { |
| 930 | return o; |
| 931 | } |
| 932 | |
| 933 | o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR; |
| 934 | |
| 935 | switch (o->op_type) { |
| 936 | case OP_REPEAT: |
| 937 | scalar(cBINOPo->op_first); |
| 938 | break; |
| 939 | case OP_OR: |
| 940 | case OP_AND: |
| 941 | case OP_COND_EXPR: |
| 942 | for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) |
| 943 | scalar(kid); |
| 944 | break; |
| 945 | /* FALL THROUGH */ |
| 946 | case OP_SPLIT: |
| 947 | case OP_MATCH: |
| 948 | case OP_QR: |
| 949 | case OP_SUBST: |
| 950 | case OP_NULL: |
| 951 | default: |
| 952 | if (o->op_flags & OPf_KIDS) { |
| 953 | for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) |
| 954 | scalar(kid); |
| 955 | } |
| 956 | break; |
| 957 | case OP_LEAVE: |
| 958 | case OP_LEAVETRY: |
| 959 | kid = cLISTOPo->op_first; |
| 960 | scalar(kid); |
| 961 | kid = kid->op_sibling; |
| 962 | do_kids: |
| 963 | while (kid) { |
| 964 | OP *sib = kid->op_sibling; |
| 965 | if (sib && kid->op_type != OP_LEAVEWHEN) { |
| 966 | if (sib->op_type == OP_BREAK && sib->op_flags & OPf_SPECIAL) { |
| 967 | scalar(kid); |
| 968 | scalarvoid(sib); |
| 969 | break; |
| 970 | } else |
| 971 | scalarvoid(kid); |
| 972 | } else |
| 973 | scalar(kid); |
| 974 | kid = sib; |
| 975 | } |
| 976 | PL_curcop = &PL_compiling; |
| 977 | break; |
| 978 | case OP_SCOPE: |
| 979 | case OP_LINESEQ: |
| 980 | case OP_LIST: |
| 981 | kid = cLISTOPo->op_first; |
| 982 | goto do_kids; |
| 983 | case OP_SORT: |
| 984 | Perl_ck_warner(aTHX_ packWARN(WARN_VOID), "Useless use of sort in scalar context"); |
| 985 | break; |
| 986 | } |
| 987 | return o; |
| 988 | } |
| 989 | |
| 990 | OP * |
| 991 | Perl_scalarvoid(pTHX_ OP *o) |
| 992 | { |
| 993 | dVAR; |
| 994 | OP *kid; |
| 995 | const char* useless = NULL; |
| 996 | SV* sv; |
| 997 | U8 want; |
| 998 | |
| 999 | PERL_ARGS_ASSERT_SCALARVOID; |
| 1000 | |
| 1001 | /* trailing mad null ops don't count as "there" for void processing */ |
| 1002 | if (PL_madskills && |
| 1003 | o->op_type != OP_NULL && |
| 1004 | o->op_sibling && |
| 1005 | o->op_sibling->op_type == OP_NULL) |
| 1006 | { |
| 1007 | OP *sib; |
| 1008 | for (sib = o->op_sibling; |
| 1009 | sib && sib->op_type == OP_NULL; |
| 1010 | sib = sib->op_sibling) ; |
| 1011 | |
| 1012 | if (!sib) |
| 1013 | return o; |
| 1014 | } |
| 1015 | |
| 1016 | if (o->op_type == OP_NEXTSTATE |
| 1017 | || o->op_type == OP_DBSTATE |
| 1018 | || (o->op_type == OP_NULL && (o->op_targ == OP_NEXTSTATE |
| 1019 | || o->op_targ == OP_DBSTATE))) |
| 1020 | PL_curcop = (COP*)o; /* for warning below */ |
| 1021 | |
| 1022 | /* assumes no premature commitment */ |
| 1023 | want = o->op_flags & OPf_WANT; |
| 1024 | if ((want && want != OPf_WANT_SCALAR) |
| 1025 | || (PL_parser && PL_parser->error_count) |
| 1026 | || o->op_type == OP_RETURN || o->op_type == OP_REQUIRE || o->op_type == OP_LEAVEWHEN) |
| 1027 | { |
| 1028 | return o; |
| 1029 | } |
| 1030 | |
| 1031 | if ((o->op_private & OPpTARGET_MY) |
| 1032 | && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */ |
| 1033 | { |
| 1034 | return scalar(o); /* As if inside SASSIGN */ |
| 1035 | } |
| 1036 | |
| 1037 | o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID; |
| 1038 | |
| 1039 | switch (o->op_type) { |
| 1040 | default: |
| 1041 | if (!(PL_opargs[o->op_type] & OA_FOLDCONST)) |
| 1042 | break; |
| 1043 | /* FALL THROUGH */ |
| 1044 | case OP_REPEAT: |
| 1045 | if (o->op_flags & OPf_STACKED) |
| 1046 | break; |
| 1047 | goto func_ops; |
| 1048 | case OP_SUBSTR: |
| 1049 | if (o->op_private == 4) |
| 1050 | break; |
| 1051 | /* FALL THROUGH */ |
| 1052 | case OP_GVSV: |
| 1053 | case OP_WANTARRAY: |
| 1054 | case OP_GV: |
| 1055 | case OP_SMARTMATCH: |
| 1056 | case OP_PADSV: |
| 1057 | case OP_PADAV: |
| 1058 | case OP_PADHV: |
| 1059 | case OP_PADANY: |
| 1060 | case OP_AV2ARYLEN: |
| 1061 | case OP_REF: |
| 1062 | case OP_REFGEN: |
| 1063 | case OP_SREFGEN: |
| 1064 | case OP_DEFINED: |
| 1065 | case OP_HEX: |
| 1066 | case OP_OCT: |
| 1067 | case OP_LENGTH: |
| 1068 | case OP_VEC: |
| 1069 | case OP_INDEX: |
| 1070 | case OP_RINDEX: |
| 1071 | case OP_SPRINTF: |
| 1072 | case OP_AELEM: |
| 1073 | case OP_AELEMFAST: |
| 1074 | case OP_ASLICE: |
| 1075 | case OP_HELEM: |
| 1076 | case OP_HSLICE: |
| 1077 | case OP_UNPACK: |
| 1078 | case OP_PACK: |
| 1079 | case OP_JOIN: |
| 1080 | case OP_LSLICE: |
| 1081 | case OP_ANONLIST: |
| 1082 | case OP_ANONHASH: |
| 1083 | case OP_SORT: |
| 1084 | case OP_REVERSE: |
| 1085 | case OP_RANGE: |
| 1086 | case OP_FLIP: |
| 1087 | case OP_FLOP: |
| 1088 | case OP_CALLER: |
| 1089 | case OP_FILENO: |
| 1090 | case OP_EOF: |
| 1091 | case OP_TELL: |
| 1092 | case OP_GETSOCKNAME: |
| 1093 | case OP_GETPEERNAME: |
| 1094 | case OP_READLINK: |
| 1095 | case OP_TELLDIR: |
| 1096 | case OP_GETPPID: |
| 1097 | case OP_GETPGRP: |
| 1098 | case OP_GETPRIORITY: |
| 1099 | case OP_TIME: |
| 1100 | case OP_TMS: |
| 1101 | case OP_LOCALTIME: |
| 1102 | case OP_GMTIME: |
| 1103 | case OP_GHBYNAME: |
| 1104 | case OP_GHBYADDR: |
| 1105 | case OP_GHOSTENT: |
| 1106 | case OP_GNBYNAME: |
| 1107 | case OP_GNBYADDR: |
| 1108 | case OP_GNETENT: |
| 1109 | case OP_GPBYNAME: |
| 1110 | case OP_GPBYNUMBER: |
| 1111 | case OP_GPROTOENT: |
| 1112 | case OP_GSBYNAME: |
| 1113 | case OP_GSBYPORT: |
| 1114 | case OP_GSERVENT: |
| 1115 | case OP_GPWNAM: |
| 1116 | case OP_GPWUID: |
| 1117 | case OP_GGRNAM: |
| 1118 | case OP_GGRGID: |
| 1119 | case OP_GETLOGIN: |
| 1120 | case OP_PROTOTYPE: |
| 1121 | func_ops: |
| 1122 | if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO))) |
| 1123 | /* Otherwise it's "Useless use of grep iterator" */ |
| 1124 | useless = OP_DESC(o); |
| 1125 | break; |
| 1126 | |
| 1127 | case OP_SPLIT: |
| 1128 | kid = cLISTOPo->op_first; |
| 1129 | if (kid && kid->op_type == OP_PUSHRE |
| 1130 | #ifdef USE_ITHREADS |
| 1131 | && !((PMOP*)kid)->op_pmreplrootu.op_pmtargetoff) |
| 1132 | #else |
| 1133 | && !((PMOP*)kid)->op_pmreplrootu.op_pmtargetgv) |
| 1134 | #endif |
| 1135 | useless = OP_DESC(o); |
| 1136 | break; |
| 1137 | |
| 1138 | case OP_NOT: |
| 1139 | kid = cUNOPo->op_first; |
| 1140 | if (kid->op_type != OP_MATCH && kid->op_type != OP_SUBST && |
| 1141 | kid->op_type != OP_TRANS) { |
| 1142 | goto func_ops; |
| 1143 | } |
| 1144 | useless = "negative pattern binding (!~)"; |
| 1145 | break; |
| 1146 | |
| 1147 | case OP_SUBST: |
| 1148 | if (cPMOPo->op_pmflags & PMf_NONDESTRUCT) |
| 1149 | useless = "Non-destructive substitution (s///r)"; |
| 1150 | break; |
| 1151 | |
| 1152 | case OP_RV2GV: |
| 1153 | case OP_RV2SV: |
| 1154 | case OP_RV2AV: |
| 1155 | case OP_RV2HV: |
| 1156 | if (!(o->op_private & (OPpLVAL_INTRO|OPpOUR_INTRO)) && |
| 1157 | (!o->op_sibling || o->op_sibling->op_type != OP_READLINE)) |
| 1158 | useless = "a variable"; |
| 1159 | break; |
| 1160 | |
| 1161 | case OP_CONST: |
| 1162 | sv = cSVOPo_sv; |
| 1163 | if (cSVOPo->op_private & OPpCONST_STRICT) |
| 1164 | no_bareword_allowed(o); |
| 1165 | else { |
| 1166 | if (ckWARN(WARN_VOID)) { |
| 1167 | if (SvOK(sv)) { |
| 1168 | SV* msv = sv_2mortal(Perl_newSVpvf(aTHX_ |
| 1169 | "a constant (%"SVf")", sv)); |
| 1170 | useless = SvPV_nolen(msv); |
| 1171 | } |
| 1172 | else |
| 1173 | useless = "a constant (undef)"; |
| 1174 | if (o->op_private & OPpCONST_ARYBASE) |
| 1175 | useless = NULL; |
| 1176 | /* don't warn on optimised away booleans, eg |
| 1177 | * use constant Foo, 5; Foo || print; */ |
| 1178 | if (cSVOPo->op_private & OPpCONST_SHORTCIRCUIT) |
| 1179 | useless = NULL; |
| 1180 | /* the constants 0 and 1 are permitted as they are |
| 1181 | conventionally used as dummies in constructs like |
| 1182 | 1 while some_condition_with_side_effects; */ |
| 1183 | else if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0)) |
| 1184 | useless = NULL; |
| 1185 | else if (SvPOK(sv)) { |
| 1186 | /* perl4's way of mixing documentation and code |
| 1187 | (before the invention of POD) was based on a |
| 1188 | trick to mix nroff and perl code. The trick was |
| 1189 | built upon these three nroff macros being used in |
| 1190 | void context. The pink camel has the details in |
| 1191 | the script wrapman near page 319. */ |
| 1192 | const char * const maybe_macro = SvPVX_const(sv); |
| 1193 | if (strnEQ(maybe_macro, "di", 2) || |
| 1194 | strnEQ(maybe_macro, "ds", 2) || |
| 1195 | strnEQ(maybe_macro, "ig", 2)) |
| 1196 | useless = NULL; |
| 1197 | } |
| 1198 | } |
| 1199 | } |
| 1200 | op_null(o); /* don't execute or even remember it */ |
| 1201 | break; |
| 1202 | |
| 1203 | case OP_POSTINC: |
| 1204 | o->op_type = OP_PREINC; /* pre-increment is faster */ |
| 1205 | o->op_ppaddr = PL_ppaddr[OP_PREINC]; |
| 1206 | break; |
| 1207 | |
| 1208 | case OP_POSTDEC: |
| 1209 | o->op_type = OP_PREDEC; /* pre-decrement is faster */ |
| 1210 | o->op_ppaddr = PL_ppaddr[OP_PREDEC]; |
| 1211 | break; |
| 1212 | |
| 1213 | case OP_I_POSTINC: |
| 1214 | o->op_type = OP_I_PREINC; /* pre-increment is faster */ |
| 1215 | o->op_ppaddr = PL_ppaddr[OP_I_PREINC]; |
| 1216 | break; |
| 1217 | |
| 1218 | case OP_I_POSTDEC: |
| 1219 | o->op_type = OP_I_PREDEC; /* pre-decrement is faster */ |
| 1220 | o->op_ppaddr = PL_ppaddr[OP_I_PREDEC]; |
| 1221 | break; |
| 1222 | |
| 1223 | case OP_OR: |
| 1224 | case OP_AND: |
| 1225 | kid = cLOGOPo->op_first; |
| 1226 | if (kid->op_type == OP_NOT |
| 1227 | && (kid->op_flags & OPf_KIDS) |
| 1228 | && !PL_madskills) { |
| 1229 | if (o->op_type == OP_AND) { |
| 1230 | o->op_type = OP_OR; |
| 1231 | o->op_ppaddr = PL_ppaddr[OP_OR]; |
| 1232 | } else { |
| 1233 | o->op_type = OP_AND; |
| 1234 | o->op_ppaddr = PL_ppaddr[OP_AND]; |
| 1235 | } |
| 1236 | op_null(kid); |
| 1237 | } |
| 1238 | |
| 1239 | case OP_DOR: |
| 1240 | case OP_COND_EXPR: |
| 1241 | case OP_ENTERGIVEN: |
| 1242 | case OP_ENTERWHEN: |
| 1243 | for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) |
| 1244 | scalarvoid(kid); |
| 1245 | break; |
| 1246 | |
| 1247 | case OP_NULL: |
| 1248 | if (o->op_flags & OPf_STACKED) |
| 1249 | break; |
| 1250 | /* FALL THROUGH */ |
| 1251 | case OP_NEXTSTATE: |
| 1252 | case OP_DBSTATE: |
| 1253 | case OP_ENTERTRY: |
| 1254 | case OP_ENTER: |
| 1255 | if (!(o->op_flags & OPf_KIDS)) |
| 1256 | break; |
| 1257 | /* FALL THROUGH */ |
| 1258 | case OP_SCOPE: |
| 1259 | case OP_LEAVE: |
| 1260 | case OP_LEAVETRY: |
| 1261 | case OP_LEAVELOOP: |
| 1262 | case OP_LINESEQ: |
| 1263 | case OP_LIST: |
| 1264 | case OP_LEAVEGIVEN: |
| 1265 | case OP_LEAVEWHEN: |
| 1266 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 1267 | scalarvoid(kid); |
| 1268 | break; |
| 1269 | case OP_ENTEREVAL: |
| 1270 | scalarkids(o); |
| 1271 | break; |
| 1272 | case OP_SCALAR: |
| 1273 | return scalar(o); |
| 1274 | } |
| 1275 | if (useless) |
| 1276 | Perl_ck_warner(aTHX_ packWARN(WARN_VOID), "Useless use of %s in void context", useless); |
| 1277 | return o; |
| 1278 | } |
| 1279 | |
| 1280 | static OP * |
| 1281 | S_listkids(pTHX_ OP *o) |
| 1282 | { |
| 1283 | if (o && o->op_flags & OPf_KIDS) { |
| 1284 | OP *kid; |
| 1285 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 1286 | list(kid); |
| 1287 | } |
| 1288 | return o; |
| 1289 | } |
| 1290 | |
| 1291 | OP * |
| 1292 | Perl_list(pTHX_ OP *o) |
| 1293 | { |
| 1294 | dVAR; |
| 1295 | OP *kid; |
| 1296 | |
| 1297 | /* assumes no premature commitment */ |
| 1298 | if (!o || (o->op_flags & OPf_WANT) |
| 1299 | || (PL_parser && PL_parser->error_count) |
| 1300 | || o->op_type == OP_RETURN) |
| 1301 | { |
| 1302 | return o; |
| 1303 | } |
| 1304 | |
| 1305 | if ((o->op_private & OPpTARGET_MY) |
| 1306 | && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */ |
| 1307 | { |
| 1308 | return o; /* As if inside SASSIGN */ |
| 1309 | } |
| 1310 | |
| 1311 | o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST; |
| 1312 | |
| 1313 | switch (o->op_type) { |
| 1314 | case OP_FLOP: |
| 1315 | case OP_REPEAT: |
| 1316 | list(cBINOPo->op_first); |
| 1317 | break; |
| 1318 | case OP_OR: |
| 1319 | case OP_AND: |
| 1320 | case OP_COND_EXPR: |
| 1321 | for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) |
| 1322 | list(kid); |
| 1323 | break; |
| 1324 | default: |
| 1325 | case OP_MATCH: |
| 1326 | case OP_QR: |
| 1327 | case OP_SUBST: |
| 1328 | case OP_NULL: |
| 1329 | if (!(o->op_flags & OPf_KIDS)) |
| 1330 | break; |
| 1331 | if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) { |
| 1332 | list(cBINOPo->op_first); |
| 1333 | return gen_constant_list(o); |
| 1334 | } |
| 1335 | case OP_LIST: |
| 1336 | listkids(o); |
| 1337 | break; |
| 1338 | case OP_LEAVE: |
| 1339 | case OP_LEAVETRY: |
| 1340 | kid = cLISTOPo->op_first; |
| 1341 | list(kid); |
| 1342 | kid = kid->op_sibling; |
| 1343 | do_kids: |
| 1344 | while (kid) { |
| 1345 | OP *sib = kid->op_sibling; |
| 1346 | if (sib && kid->op_type != OP_LEAVEWHEN) { |
| 1347 | if (sib->op_type == OP_BREAK && sib->op_flags & OPf_SPECIAL) { |
| 1348 | list(kid); |
| 1349 | scalarvoid(sib); |
| 1350 | break; |
| 1351 | } else |
| 1352 | scalarvoid(kid); |
| 1353 | } else |
| 1354 | list(kid); |
| 1355 | kid = sib; |
| 1356 | } |
| 1357 | PL_curcop = &PL_compiling; |
| 1358 | break; |
| 1359 | case OP_SCOPE: |
| 1360 | case OP_LINESEQ: |
| 1361 | kid = cLISTOPo->op_first; |
| 1362 | goto do_kids; |
| 1363 | } |
| 1364 | return o; |
| 1365 | } |
| 1366 | |
| 1367 | static OP * |
| 1368 | S_scalarseq(pTHX_ OP *o) |
| 1369 | { |
| 1370 | dVAR; |
| 1371 | if (o) { |
| 1372 | const OPCODE type = o->op_type; |
| 1373 | |
| 1374 | if (type == OP_LINESEQ || type == OP_SCOPE || |
| 1375 | type == OP_LEAVE || type == OP_LEAVETRY) |
| 1376 | { |
| 1377 | OP *kid; |
| 1378 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) { |
| 1379 | if (kid->op_sibling) { |
| 1380 | scalarvoid(kid); |
| 1381 | } |
| 1382 | } |
| 1383 | PL_curcop = &PL_compiling; |
| 1384 | } |
| 1385 | o->op_flags &= ~OPf_PARENS; |
| 1386 | if (PL_hints & HINT_BLOCK_SCOPE) |
| 1387 | o->op_flags |= OPf_PARENS; |
| 1388 | } |
| 1389 | else |
| 1390 | o = newOP(OP_STUB, 0); |
| 1391 | return o; |
| 1392 | } |
| 1393 | |
| 1394 | STATIC OP * |
| 1395 | S_modkids(pTHX_ OP *o, I32 type) |
| 1396 | { |
| 1397 | if (o && o->op_flags & OPf_KIDS) { |
| 1398 | OP *kid; |
| 1399 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 1400 | mod(kid, type); |
| 1401 | } |
| 1402 | return o; |
| 1403 | } |
| 1404 | |
| 1405 | /* Propagate lvalue ("modifiable") context to an op and its children. |
| 1406 | * 'type' represents the context type, roughly based on the type of op that |
| 1407 | * would do the modifying, although local() is represented by OP_NULL. |
| 1408 | * It's responsible for detecting things that can't be modified, flag |
| 1409 | * things that need to behave specially in an lvalue context (e.g., "$$x = 5" |
| 1410 | * might have to vivify a reference in $x), and so on. |
| 1411 | * |
| 1412 | * For example, "$a+1 = 2" would cause mod() to be called with o being |
| 1413 | * OP_ADD and type being OP_SASSIGN, and would output an error. |
| 1414 | */ |
| 1415 | |
| 1416 | OP * |
| 1417 | Perl_mod(pTHX_ OP *o, I32 type) |
| 1418 | { |
| 1419 | dVAR; |
| 1420 | OP *kid; |
| 1421 | /* -1 = error on localize, 0 = ignore localize, 1 = ok to localize */ |
| 1422 | int localize = -1; |
| 1423 | |
| 1424 | if (!o || (PL_parser && PL_parser->error_count)) |
| 1425 | return o; |
| 1426 | |
| 1427 | if ((o->op_private & OPpTARGET_MY) |
| 1428 | && (PL_opargs[o->op_type] & OA_TARGLEX))/* OPp share the meaning */ |
| 1429 | { |
| 1430 | return o; |
| 1431 | } |
| 1432 | |
| 1433 | switch (o->op_type) { |
| 1434 | case OP_UNDEF: |
| 1435 | localize = 0; |
| 1436 | PL_modcount++; |
| 1437 | return o; |
| 1438 | case OP_CONST: |
| 1439 | if (!(o->op_private & OPpCONST_ARYBASE)) |
| 1440 | goto nomod; |
| 1441 | localize = 0; |
| 1442 | if (PL_eval_start && PL_eval_start->op_type == OP_CONST) { |
| 1443 | CopARYBASE_set(&PL_compiling, |
| 1444 | (I32)SvIV(cSVOPx(PL_eval_start)->op_sv)); |
| 1445 | PL_eval_start = 0; |
| 1446 | } |
| 1447 | else if (!type) { |
| 1448 | SAVECOPARYBASE(&PL_compiling); |
| 1449 | CopARYBASE_set(&PL_compiling, 0); |
| 1450 | } |
| 1451 | else if (type == OP_REFGEN) |
| 1452 | goto nomod; |
| 1453 | else |
| 1454 | Perl_croak(aTHX_ "That use of $[ is unsupported"); |
| 1455 | break; |
| 1456 | case OP_STUB: |
| 1457 | if ((o->op_flags & OPf_PARENS) || PL_madskills) |
| 1458 | break; |
| 1459 | goto nomod; |
| 1460 | case OP_ENTERSUB: |
| 1461 | if ((type == OP_UNDEF || type == OP_REFGEN) && |
| 1462 | !(o->op_flags & OPf_STACKED)) { |
| 1463 | o->op_type = OP_RV2CV; /* entersub => rv2cv */ |
| 1464 | /* The default is to set op_private to the number of children, |
| 1465 | which for a UNOP such as RV2CV is always 1. And w're using |
| 1466 | the bit for a flag in RV2CV, so we need it clear. */ |
| 1467 | o->op_private &= ~1; |
| 1468 | o->op_ppaddr = PL_ppaddr[OP_RV2CV]; |
| 1469 | assert(cUNOPo->op_first->op_type == OP_NULL); |
| 1470 | op_null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */ |
| 1471 | break; |
| 1472 | } |
| 1473 | else if (o->op_private & OPpENTERSUB_NOMOD) |
| 1474 | return o; |
| 1475 | else { /* lvalue subroutine call */ |
| 1476 | o->op_private |= OPpLVAL_INTRO; |
| 1477 | PL_modcount = RETURN_UNLIMITED_NUMBER; |
| 1478 | if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) { |
| 1479 | /* Backward compatibility mode: */ |
| 1480 | o->op_private |= OPpENTERSUB_INARGS; |
| 1481 | break; |
| 1482 | } |
| 1483 | else { /* Compile-time error message: */ |
| 1484 | OP *kid = cUNOPo->op_first; |
| 1485 | CV *cv; |
| 1486 | OP *okid; |
| 1487 | |
| 1488 | if (kid->op_type != OP_PUSHMARK) { |
| 1489 | if (kid->op_type != OP_NULL || kid->op_targ != OP_LIST) |
| 1490 | Perl_croak(aTHX_ |
| 1491 | "panic: unexpected lvalue entersub " |
| 1492 | "args: type/targ %ld:%"UVuf, |
| 1493 | (long)kid->op_type, (UV)kid->op_targ); |
| 1494 | kid = kLISTOP->op_first; |
| 1495 | } |
| 1496 | while (kid->op_sibling) |
| 1497 | kid = kid->op_sibling; |
| 1498 | if (!(kid->op_type == OP_NULL && kid->op_targ == OP_RV2CV)) { |
| 1499 | /* Indirect call */ |
| 1500 | if (kid->op_type == OP_METHOD_NAMED |
| 1501 | || kid->op_type == OP_METHOD) |
| 1502 | { |
| 1503 | UNOP *newop; |
| 1504 | |
| 1505 | NewOp(1101, newop, 1, UNOP); |
| 1506 | newop->op_type = OP_RV2CV; |
| 1507 | newop->op_ppaddr = PL_ppaddr[OP_RV2CV]; |
| 1508 | newop->op_first = NULL; |
| 1509 | newop->op_next = (OP*)newop; |
| 1510 | kid->op_sibling = (OP*)newop; |
| 1511 | newop->op_private |= OPpLVAL_INTRO; |
| 1512 | newop->op_private &= ~1; |
| 1513 | break; |
| 1514 | } |
| 1515 | |
| 1516 | if (kid->op_type != OP_RV2CV) |
| 1517 | Perl_croak(aTHX_ |
| 1518 | "panic: unexpected lvalue entersub " |
| 1519 | "entry via type/targ %ld:%"UVuf, |
| 1520 | (long)kid->op_type, (UV)kid->op_targ); |
| 1521 | kid->op_private |= OPpLVAL_INTRO; |
| 1522 | break; /* Postpone until runtime */ |
| 1523 | } |
| 1524 | |
| 1525 | okid = kid; |
| 1526 | kid = kUNOP->op_first; |
| 1527 | if (kid->op_type == OP_NULL && kid->op_targ == OP_RV2SV) |
| 1528 | kid = kUNOP->op_first; |
| 1529 | if (kid->op_type == OP_NULL) |
| 1530 | Perl_croak(aTHX_ |
| 1531 | "Unexpected constant lvalue entersub " |
| 1532 | "entry via type/targ %ld:%"UVuf, |
| 1533 | (long)kid->op_type, (UV)kid->op_targ); |
| 1534 | if (kid->op_type != OP_GV) { |
| 1535 | /* Restore RV2CV to check lvalueness */ |
| 1536 | restore_2cv: |
| 1537 | if (kid->op_next && kid->op_next != kid) { /* Happens? */ |
| 1538 | okid->op_next = kid->op_next; |
| 1539 | kid->op_next = okid; |
| 1540 | } |
| 1541 | else |
| 1542 | okid->op_next = NULL; |
| 1543 | okid->op_type = OP_RV2CV; |
| 1544 | okid->op_targ = 0; |
| 1545 | okid->op_ppaddr = PL_ppaddr[OP_RV2CV]; |
| 1546 | okid->op_private |= OPpLVAL_INTRO; |
| 1547 | okid->op_private &= ~1; |
| 1548 | break; |
| 1549 | } |
| 1550 | |
| 1551 | cv = GvCV(kGVOP_gv); |
| 1552 | if (!cv) |
| 1553 | goto restore_2cv; |
| 1554 | if (CvLVALUE(cv)) |
| 1555 | break; |
| 1556 | } |
| 1557 | } |
| 1558 | /* FALL THROUGH */ |
| 1559 | default: |
| 1560 | nomod: |
| 1561 | /* grep, foreach, subcalls, refgen */ |
| 1562 | if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN) |
| 1563 | break; |
| 1564 | yyerror(Perl_form(aTHX_ "Can't modify %s in %s", |
| 1565 | (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL) |
| 1566 | ? "do block" |
| 1567 | : (o->op_type == OP_ENTERSUB |
| 1568 | ? "non-lvalue subroutine call" |
| 1569 | : OP_DESC(o))), |
| 1570 | type ? PL_op_desc[type] : "local")); |
| 1571 | return o; |
| 1572 | |
| 1573 | case OP_PREINC: |
| 1574 | case OP_PREDEC: |
| 1575 | case OP_POW: |
| 1576 | case OP_MULTIPLY: |
| 1577 | case OP_DIVIDE: |
| 1578 | case OP_MODULO: |
| 1579 | case OP_REPEAT: |
| 1580 | case OP_ADD: |
| 1581 | case OP_SUBTRACT: |
| 1582 | case OP_CONCAT: |
| 1583 | case OP_LEFT_SHIFT: |
| 1584 | case OP_RIGHT_SHIFT: |
| 1585 | case OP_BIT_AND: |
| 1586 | case OP_BIT_XOR: |
| 1587 | case OP_BIT_OR: |
| 1588 | case OP_I_MULTIPLY: |
| 1589 | case OP_I_DIVIDE: |
| 1590 | case OP_I_MODULO: |
| 1591 | case OP_I_ADD: |
| 1592 | case OP_I_SUBTRACT: |
| 1593 | if (!(o->op_flags & OPf_STACKED)) |
| 1594 | goto nomod; |
| 1595 | PL_modcount++; |
| 1596 | break; |
| 1597 | |
| 1598 | case OP_COND_EXPR: |
| 1599 | localize = 1; |
| 1600 | for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) |
| 1601 | mod(kid, type); |
| 1602 | break; |
| 1603 | |
| 1604 | case OP_RV2AV: |
| 1605 | case OP_RV2HV: |
| 1606 | if (type == OP_REFGEN && o->op_flags & OPf_PARENS) { |
| 1607 | PL_modcount = RETURN_UNLIMITED_NUMBER; |
| 1608 | return o; /* Treat \(@foo) like ordinary list. */ |
| 1609 | } |
| 1610 | /* FALL THROUGH */ |
| 1611 | case OP_RV2GV: |
| 1612 | if (scalar_mod_type(o, type)) |
| 1613 | goto nomod; |
| 1614 | ref(cUNOPo->op_first, o->op_type); |
| 1615 | /* FALL THROUGH */ |
| 1616 | case OP_ASLICE: |
| 1617 | case OP_HSLICE: |
| 1618 | if (type == OP_LEAVESUBLV) |
| 1619 | o->op_private |= OPpMAYBE_LVSUB; |
| 1620 | localize = 1; |
| 1621 | /* FALL THROUGH */ |
| 1622 | case OP_AASSIGN: |
| 1623 | case OP_NEXTSTATE: |
| 1624 | case OP_DBSTATE: |
| 1625 | PL_modcount = RETURN_UNLIMITED_NUMBER; |
| 1626 | break; |
| 1627 | case OP_AV2ARYLEN: |
| 1628 | PL_hints |= HINT_BLOCK_SCOPE; |
| 1629 | if (type == OP_LEAVESUBLV) |
| 1630 | o->op_private |= OPpMAYBE_LVSUB; |
| 1631 | PL_modcount++; |
| 1632 | break; |
| 1633 | case OP_RV2SV: |
| 1634 | ref(cUNOPo->op_first, o->op_type); |
| 1635 | localize = 1; |
| 1636 | /* FALL THROUGH */ |
| 1637 | case OP_GV: |
| 1638 | PL_hints |= HINT_BLOCK_SCOPE; |
| 1639 | case OP_SASSIGN: |
| 1640 | case OP_ANDASSIGN: |
| 1641 | case OP_ORASSIGN: |
| 1642 | case OP_DORASSIGN: |
| 1643 | PL_modcount++; |
| 1644 | break; |
| 1645 | |
| 1646 | case OP_AELEMFAST: |
| 1647 | localize = -1; |
| 1648 | PL_modcount++; |
| 1649 | break; |
| 1650 | |
| 1651 | case OP_PADAV: |
| 1652 | case OP_PADHV: |
| 1653 | PL_modcount = RETURN_UNLIMITED_NUMBER; |
| 1654 | if (type == OP_REFGEN && o->op_flags & OPf_PARENS) |
| 1655 | return o; /* Treat \(@foo) like ordinary list. */ |
| 1656 | if (scalar_mod_type(o, type)) |
| 1657 | goto nomod; |
| 1658 | if (type == OP_LEAVESUBLV) |
| 1659 | o->op_private |= OPpMAYBE_LVSUB; |
| 1660 | /* FALL THROUGH */ |
| 1661 | case OP_PADSV: |
| 1662 | PL_modcount++; |
| 1663 | if (!type) /* local() */ |
| 1664 | Perl_croak(aTHX_ "Can't localize lexical variable %s", |
| 1665 | PAD_COMPNAME_PV(o->op_targ)); |
| 1666 | break; |
| 1667 | |
| 1668 | case OP_PUSHMARK: |
| 1669 | localize = 0; |
| 1670 | break; |
| 1671 | |
| 1672 | case OP_KEYS: |
| 1673 | if (type != OP_SASSIGN) |
| 1674 | goto nomod; |
| 1675 | goto lvalue_func; |
| 1676 | case OP_SUBSTR: |
| 1677 | if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */ |
| 1678 | goto nomod; |
| 1679 | /* FALL THROUGH */ |
| 1680 | case OP_POS: |
| 1681 | case OP_VEC: |
| 1682 | if (type == OP_LEAVESUBLV) |
| 1683 | o->op_private |= OPpMAYBE_LVSUB; |
| 1684 | lvalue_func: |
| 1685 | pad_free(o->op_targ); |
| 1686 | o->op_targ = pad_alloc(o->op_type, SVs_PADMY); |
| 1687 | assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL); |
| 1688 | if (o->op_flags & OPf_KIDS) |
| 1689 | mod(cBINOPo->op_first->op_sibling, type); |
| 1690 | break; |
| 1691 | |
| 1692 | case OP_AELEM: |
| 1693 | case OP_HELEM: |
| 1694 | ref(cBINOPo->op_first, o->op_type); |
| 1695 | if (type == OP_ENTERSUB && |
| 1696 | !(o->op_private & (OPpLVAL_INTRO | OPpDEREF))) |
| 1697 | o->op_private |= OPpLVAL_DEFER; |
| 1698 | if (type == OP_LEAVESUBLV) |
| 1699 | o->op_private |= OPpMAYBE_LVSUB; |
| 1700 | localize = 1; |
| 1701 | PL_modcount++; |
| 1702 | break; |
| 1703 | |
| 1704 | case OP_SCOPE: |
| 1705 | case OP_LEAVE: |
| 1706 | case OP_ENTER: |
| 1707 | case OP_LINESEQ: |
| 1708 | localize = 0; |
| 1709 | if (o->op_flags & OPf_KIDS) |
| 1710 | mod(cLISTOPo->op_last, type); |
| 1711 | break; |
| 1712 | |
| 1713 | case OP_NULL: |
| 1714 | localize = 0; |
| 1715 | if (o->op_flags & OPf_SPECIAL) /* do BLOCK */ |
| 1716 | goto nomod; |
| 1717 | else if (!(o->op_flags & OPf_KIDS)) |
| 1718 | break; |
| 1719 | if (o->op_targ != OP_LIST) { |
| 1720 | mod(cBINOPo->op_first, type); |
| 1721 | break; |
| 1722 | } |
| 1723 | /* FALL THROUGH */ |
| 1724 | case OP_LIST: |
| 1725 | localize = 0; |
| 1726 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 1727 | mod(kid, type); |
| 1728 | break; |
| 1729 | |
| 1730 | case OP_RETURN: |
| 1731 | if (type != OP_LEAVESUBLV) |
| 1732 | goto nomod; |
| 1733 | break; /* mod()ing was handled by ck_return() */ |
| 1734 | } |
| 1735 | |
| 1736 | /* [20011101.069] File test operators interpret OPf_REF to mean that |
| 1737 | their argument is a filehandle; thus \stat(".") should not set |
| 1738 | it. AMS 20011102 */ |
| 1739 | if (type == OP_REFGEN && |
| 1740 | PL_check[o->op_type] == Perl_ck_ftst) |
| 1741 | return o; |
| 1742 | |
| 1743 | if (type != OP_LEAVESUBLV) |
| 1744 | o->op_flags |= OPf_MOD; |
| 1745 | |
| 1746 | if (type == OP_AASSIGN || type == OP_SASSIGN) |
| 1747 | o->op_flags |= OPf_SPECIAL|OPf_REF; |
| 1748 | else if (!type) { /* local() */ |
| 1749 | switch (localize) { |
| 1750 | case 1: |
| 1751 | o->op_private |= OPpLVAL_INTRO; |
| 1752 | o->op_flags &= ~OPf_SPECIAL; |
| 1753 | PL_hints |= HINT_BLOCK_SCOPE; |
| 1754 | break; |
| 1755 | case 0: |
| 1756 | break; |
| 1757 | case -1: |
| 1758 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
| 1759 | "Useless localization of %s", OP_DESC(o)); |
| 1760 | } |
| 1761 | } |
| 1762 | else if (type != OP_GREPSTART && type != OP_ENTERSUB |
| 1763 | && type != OP_LEAVESUBLV) |
| 1764 | o->op_flags |= OPf_REF; |
| 1765 | return o; |
| 1766 | } |
| 1767 | |
| 1768 | STATIC bool |
| 1769 | S_scalar_mod_type(const OP *o, I32 type) |
| 1770 | { |
| 1771 | PERL_ARGS_ASSERT_SCALAR_MOD_TYPE; |
| 1772 | |
| 1773 | switch (type) { |
| 1774 | case OP_SASSIGN: |
| 1775 | if (o->op_type == OP_RV2GV) |
| 1776 | return FALSE; |
| 1777 | /* FALL THROUGH */ |
| 1778 | case OP_PREINC: |
| 1779 | case OP_PREDEC: |
| 1780 | case OP_POSTINC: |
| 1781 | case OP_POSTDEC: |
| 1782 | case OP_I_PREINC: |
| 1783 | case OP_I_PREDEC: |
| 1784 | case OP_I_POSTINC: |
| 1785 | case OP_I_POSTDEC: |
| 1786 | case OP_POW: |
| 1787 | case OP_MULTIPLY: |
| 1788 | case OP_DIVIDE: |
| 1789 | case OP_MODULO: |
| 1790 | case OP_REPEAT: |
| 1791 | case OP_ADD: |
| 1792 | case OP_SUBTRACT: |
| 1793 | case OP_I_MULTIPLY: |
| 1794 | case OP_I_DIVIDE: |
| 1795 | case OP_I_MODULO: |
| 1796 | case OP_I_ADD: |
| 1797 | case OP_I_SUBTRACT: |
| 1798 | case OP_LEFT_SHIFT: |
| 1799 | case OP_RIGHT_SHIFT: |
| 1800 | case OP_BIT_AND: |
| 1801 | case OP_BIT_XOR: |
| 1802 | case OP_BIT_OR: |
| 1803 | case OP_CONCAT: |
| 1804 | case OP_SUBST: |
| 1805 | case OP_TRANS: |
| 1806 | case OP_READ: |
| 1807 | case OP_SYSREAD: |
| 1808 | case OP_RECV: |
| 1809 | case OP_ANDASSIGN: |
| 1810 | case OP_ORASSIGN: |
| 1811 | case OP_DORASSIGN: |
| 1812 | return TRUE; |
| 1813 | default: |
| 1814 | return FALSE; |
| 1815 | } |
| 1816 | } |
| 1817 | |
| 1818 | STATIC bool |
| 1819 | S_is_handle_constructor(const OP *o, I32 numargs) |
| 1820 | { |
| 1821 | PERL_ARGS_ASSERT_IS_HANDLE_CONSTRUCTOR; |
| 1822 | |
| 1823 | switch (o->op_type) { |
| 1824 | case OP_PIPE_OP: |
| 1825 | case OP_SOCKPAIR: |
| 1826 | if (numargs == 2) |
| 1827 | return TRUE; |
| 1828 | /* FALL THROUGH */ |
| 1829 | case OP_SYSOPEN: |
| 1830 | case OP_OPEN: |
| 1831 | case OP_SELECT: /* XXX c.f. SelectSaver.pm */ |
| 1832 | case OP_SOCKET: |
| 1833 | case OP_OPEN_DIR: |
| 1834 | case OP_ACCEPT: |
| 1835 | if (numargs == 1) |
| 1836 | return TRUE; |
| 1837 | /* FALLTHROUGH */ |
| 1838 | default: |
| 1839 | return FALSE; |
| 1840 | } |
| 1841 | } |
| 1842 | |
| 1843 | static OP * |
| 1844 | S_refkids(pTHX_ OP *o, I32 type) |
| 1845 | { |
| 1846 | if (o && o->op_flags & OPf_KIDS) { |
| 1847 | OP *kid; |
| 1848 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 1849 | ref(kid, type); |
| 1850 | } |
| 1851 | return o; |
| 1852 | } |
| 1853 | |
| 1854 | OP * |
| 1855 | Perl_doref(pTHX_ OP *o, I32 type, bool set_op_ref) |
| 1856 | { |
| 1857 | dVAR; |
| 1858 | OP *kid; |
| 1859 | |
| 1860 | PERL_ARGS_ASSERT_DOREF; |
| 1861 | |
| 1862 | if (!o || (PL_parser && PL_parser->error_count)) |
| 1863 | return o; |
| 1864 | |
| 1865 | switch (o->op_type) { |
| 1866 | case OP_ENTERSUB: |
| 1867 | if ((type == OP_EXISTS || type == OP_DEFINED || type == OP_LOCK) && |
| 1868 | !(o->op_flags & OPf_STACKED)) { |
| 1869 | o->op_type = OP_RV2CV; /* entersub => rv2cv */ |
| 1870 | o->op_ppaddr = PL_ppaddr[OP_RV2CV]; |
| 1871 | assert(cUNOPo->op_first->op_type == OP_NULL); |
| 1872 | op_null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */ |
| 1873 | o->op_flags |= OPf_SPECIAL; |
| 1874 | o->op_private &= ~1; |
| 1875 | } |
| 1876 | break; |
| 1877 | |
| 1878 | case OP_COND_EXPR: |
| 1879 | for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling) |
| 1880 | doref(kid, type, set_op_ref); |
| 1881 | break; |
| 1882 | case OP_RV2SV: |
| 1883 | if (type == OP_DEFINED) |
| 1884 | o->op_flags |= OPf_SPECIAL; /* don't create GV */ |
| 1885 | doref(cUNOPo->op_first, o->op_type, set_op_ref); |
| 1886 | /* FALL THROUGH */ |
| 1887 | case OP_PADSV: |
| 1888 | if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) { |
| 1889 | o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV |
| 1890 | : type == OP_RV2HV ? OPpDEREF_HV |
| 1891 | : OPpDEREF_SV); |
| 1892 | o->op_flags |= OPf_MOD; |
| 1893 | } |
| 1894 | break; |
| 1895 | |
| 1896 | case OP_RV2AV: |
| 1897 | case OP_RV2HV: |
| 1898 | if (set_op_ref) |
| 1899 | o->op_flags |= OPf_REF; |
| 1900 | /* FALL THROUGH */ |
| 1901 | case OP_RV2GV: |
| 1902 | if (type == OP_DEFINED) |
| 1903 | o->op_flags |= OPf_SPECIAL; /* don't create GV */ |
| 1904 | doref(cUNOPo->op_first, o->op_type, set_op_ref); |
| 1905 | break; |
| 1906 | |
| 1907 | case OP_PADAV: |
| 1908 | case OP_PADHV: |
| 1909 | if (set_op_ref) |
| 1910 | o->op_flags |= OPf_REF; |
| 1911 | break; |
| 1912 | |
| 1913 | case OP_SCALAR: |
| 1914 | case OP_NULL: |
| 1915 | if (!(o->op_flags & OPf_KIDS)) |
| 1916 | break; |
| 1917 | doref(cBINOPo->op_first, type, set_op_ref); |
| 1918 | break; |
| 1919 | case OP_AELEM: |
| 1920 | case OP_HELEM: |
| 1921 | doref(cBINOPo->op_first, o->op_type, set_op_ref); |
| 1922 | if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) { |
| 1923 | o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV |
| 1924 | : type == OP_RV2HV ? OPpDEREF_HV |
| 1925 | : OPpDEREF_SV); |
| 1926 | o->op_flags |= OPf_MOD; |
| 1927 | } |
| 1928 | break; |
| 1929 | |
| 1930 | case OP_SCOPE: |
| 1931 | case OP_LEAVE: |
| 1932 | set_op_ref = FALSE; |
| 1933 | /* FALL THROUGH */ |
| 1934 | case OP_ENTER: |
| 1935 | case OP_LIST: |
| 1936 | if (!(o->op_flags & OPf_KIDS)) |
| 1937 | break; |
| 1938 | doref(cLISTOPo->op_last, type, set_op_ref); |
| 1939 | break; |
| 1940 | default: |
| 1941 | break; |
| 1942 | } |
| 1943 | return scalar(o); |
| 1944 | |
| 1945 | } |
| 1946 | |
| 1947 | STATIC OP * |
| 1948 | S_dup_attrlist(pTHX_ OP *o) |
| 1949 | { |
| 1950 | dVAR; |
| 1951 | OP *rop; |
| 1952 | |
| 1953 | PERL_ARGS_ASSERT_DUP_ATTRLIST; |
| 1954 | |
| 1955 | /* An attrlist is either a simple OP_CONST or an OP_LIST with kids, |
| 1956 | * where the first kid is OP_PUSHMARK and the remaining ones |
| 1957 | * are OP_CONST. We need to push the OP_CONST values. |
| 1958 | */ |
| 1959 | if (o->op_type == OP_CONST) |
| 1960 | rop = newSVOP(OP_CONST, o->op_flags, SvREFCNT_inc_NN(cSVOPo->op_sv)); |
| 1961 | #ifdef PERL_MAD |
| 1962 | else if (o->op_type == OP_NULL) |
| 1963 | rop = NULL; |
| 1964 | #endif |
| 1965 | else { |
| 1966 | assert((o->op_type == OP_LIST) && (o->op_flags & OPf_KIDS)); |
| 1967 | rop = NULL; |
| 1968 | for (o = cLISTOPo->op_first; o; o=o->op_sibling) { |
| 1969 | if (o->op_type == OP_CONST) |
| 1970 | rop = op_append_elem(OP_LIST, rop, |
| 1971 | newSVOP(OP_CONST, o->op_flags, |
| 1972 | SvREFCNT_inc_NN(cSVOPo->op_sv))); |
| 1973 | } |
| 1974 | } |
| 1975 | return rop; |
| 1976 | } |
| 1977 | |
| 1978 | STATIC void |
| 1979 | S_apply_attrs(pTHX_ HV *stash, SV *target, OP *attrs, bool for_my) |
| 1980 | { |
| 1981 | dVAR; |
| 1982 | SV *stashsv; |
| 1983 | |
| 1984 | PERL_ARGS_ASSERT_APPLY_ATTRS; |
| 1985 | |
| 1986 | /* fake up C<use attributes $pkg,$rv,@attrs> */ |
| 1987 | ENTER; /* need to protect against side-effects of 'use' */ |
| 1988 | stashsv = stash ? newSVhek(HvNAME_HEK(stash)) : &PL_sv_no; |
| 1989 | |
| 1990 | #define ATTRSMODULE "attributes" |
| 1991 | #define ATTRSMODULE_PM "attributes.pm" |
| 1992 | |
| 1993 | if (for_my) { |
| 1994 | /* Don't force the C<use> if we don't need it. */ |
| 1995 | SV * const * const svp = hv_fetchs(GvHVn(PL_incgv), ATTRSMODULE_PM, FALSE); |
| 1996 | if (svp && *svp != &PL_sv_undef) |
| 1997 | NOOP; /* already in %INC */ |
| 1998 | else |
| 1999 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
| 2000 | newSVpvs(ATTRSMODULE), NULL); |
| 2001 | } |
| 2002 | else { |
| 2003 | Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS, |
| 2004 | newSVpvs(ATTRSMODULE), |
| 2005 | NULL, |
| 2006 | op_prepend_elem(OP_LIST, |
| 2007 | newSVOP(OP_CONST, 0, stashsv), |
| 2008 | op_prepend_elem(OP_LIST, |
| 2009 | newSVOP(OP_CONST, 0, |
| 2010 | newRV(target)), |
| 2011 | dup_attrlist(attrs)))); |
| 2012 | } |
| 2013 | LEAVE; |
| 2014 | } |
| 2015 | |
| 2016 | STATIC void |
| 2017 | S_apply_attrs_my(pTHX_ HV *stash, OP *target, OP *attrs, OP **imopsp) |
| 2018 | { |
| 2019 | dVAR; |
| 2020 | OP *pack, *imop, *arg; |
| 2021 | SV *meth, *stashsv; |
| 2022 | |
| 2023 | PERL_ARGS_ASSERT_APPLY_ATTRS_MY; |
| 2024 | |
| 2025 | if (!attrs) |
| 2026 | return; |
| 2027 | |
| 2028 | assert(target->op_type == OP_PADSV || |
| 2029 | target->op_type == OP_PADHV || |
| 2030 | target->op_type == OP_PADAV); |
| 2031 | |
| 2032 | /* Ensure that attributes.pm is loaded. */ |
| 2033 | apply_attrs(stash, PAD_SV(target->op_targ), attrs, TRUE); |
| 2034 | |
| 2035 | /* Need package name for method call. */ |
| 2036 | pack = newSVOP(OP_CONST, 0, newSVpvs(ATTRSMODULE)); |
| 2037 | |
| 2038 | /* Build up the real arg-list. */ |
| 2039 | stashsv = stash ? newSVhek(HvNAME_HEK(stash)) : &PL_sv_no; |
| 2040 | |
| 2041 | arg = newOP(OP_PADSV, 0); |
| 2042 | arg->op_targ = target->op_targ; |
| 2043 | arg = op_prepend_elem(OP_LIST, |
| 2044 | newSVOP(OP_CONST, 0, stashsv), |
| 2045 | op_prepend_elem(OP_LIST, |
| 2046 | newUNOP(OP_REFGEN, 0, |
| 2047 | mod(arg, OP_REFGEN)), |
| 2048 | dup_attrlist(attrs))); |
| 2049 | |
| 2050 | /* Fake up a method call to import */ |
| 2051 | meth = newSVpvs_share("import"); |
| 2052 | imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL|OPf_WANT_VOID, |
| 2053 | op_append_elem(OP_LIST, |
| 2054 | op_prepend_elem(OP_LIST, pack, list(arg)), |
| 2055 | newSVOP(OP_METHOD_NAMED, 0, meth))); |
| 2056 | imop->op_private |= OPpENTERSUB_NOMOD; |
| 2057 | |
| 2058 | /* Combine the ops. */ |
| 2059 | *imopsp = op_append_elem(OP_LIST, *imopsp, imop); |
| 2060 | } |
| 2061 | |
| 2062 | /* |
| 2063 | =notfor apidoc apply_attrs_string |
| 2064 | |
| 2065 | Attempts to apply a list of attributes specified by the C<attrstr> and |
| 2066 | C<len> arguments to the subroutine identified by the C<cv> argument which |
| 2067 | is expected to be associated with the package identified by the C<stashpv> |
| 2068 | argument (see L<attributes>). It gets this wrong, though, in that it |
| 2069 | does not correctly identify the boundaries of the individual attribute |
| 2070 | specifications within C<attrstr>. This is not really intended for the |
| 2071 | public API, but has to be listed here for systems such as AIX which |
| 2072 | need an explicit export list for symbols. (It's called from XS code |
| 2073 | in support of the C<ATTRS:> keyword from F<xsubpp>.) Patches to fix it |
| 2074 | to respect attribute syntax properly would be welcome. |
| 2075 | |
| 2076 | =cut |
| 2077 | */ |
| 2078 | |
| 2079 | void |
| 2080 | Perl_apply_attrs_string(pTHX_ const char *stashpv, CV *cv, |
| 2081 | const char *attrstr, STRLEN len) |
| 2082 | { |
| 2083 | OP *attrs = NULL; |
| 2084 | |
| 2085 | PERL_ARGS_ASSERT_APPLY_ATTRS_STRING; |
| 2086 | |
| 2087 | if (!len) { |
| 2088 | len = strlen(attrstr); |
| 2089 | } |
| 2090 | |
| 2091 | while (len) { |
| 2092 | for (; isSPACE(*attrstr) && len; --len, ++attrstr) ; |
| 2093 | if (len) { |
| 2094 | const char * const sstr = attrstr; |
| 2095 | for (; !isSPACE(*attrstr) && len; --len, ++attrstr) ; |
| 2096 | attrs = op_append_elem(OP_LIST, attrs, |
| 2097 | newSVOP(OP_CONST, 0, |
| 2098 | newSVpvn(sstr, attrstr-sstr))); |
| 2099 | } |
| 2100 | } |
| 2101 | |
| 2102 | Perl_load_module(aTHX_ PERL_LOADMOD_IMPORT_OPS, |
| 2103 | newSVpvs(ATTRSMODULE), |
| 2104 | NULL, op_prepend_elem(OP_LIST, |
| 2105 | newSVOP(OP_CONST, 0, newSVpv(stashpv,0)), |
| 2106 | op_prepend_elem(OP_LIST, |
| 2107 | newSVOP(OP_CONST, 0, |
| 2108 | newRV(MUTABLE_SV(cv))), |
| 2109 | attrs))); |
| 2110 | } |
| 2111 | |
| 2112 | STATIC OP * |
| 2113 | S_my_kid(pTHX_ OP *o, OP *attrs, OP **imopsp) |
| 2114 | { |
| 2115 | dVAR; |
| 2116 | I32 type; |
| 2117 | |
| 2118 | PERL_ARGS_ASSERT_MY_KID; |
| 2119 | |
| 2120 | if (!o || (PL_parser && PL_parser->error_count)) |
| 2121 | return o; |
| 2122 | |
| 2123 | type = o->op_type; |
| 2124 | if (PL_madskills && type == OP_NULL && o->op_flags & OPf_KIDS) { |
| 2125 | (void)my_kid(cUNOPo->op_first, attrs, imopsp); |
| 2126 | return o; |
| 2127 | } |
| 2128 | |
| 2129 | if (type == OP_LIST) { |
| 2130 | OP *kid; |
| 2131 | for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) |
| 2132 | my_kid(kid, attrs, imopsp); |
| 2133 | } else if (type == OP_UNDEF |
| 2134 | #ifdef PERL_MAD |
| 2135 | || type == OP_STUB |
| 2136 | #endif |
| 2137 | ) { |
| 2138 | return o; |
| 2139 | } else if (type == OP_RV2SV || /* "our" declaration */ |
| 2140 | type == OP_RV2AV || |
| 2141 | type == OP_RV2HV) { /* XXX does this let anything illegal in? */ |
| 2142 | if (cUNOPo->op_first->op_type != OP_GV) { /* MJD 20011224 */ |
| 2143 | yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"", |
| 2144 | OP_DESC(o), |
| 2145 | PL_parser->in_my == KEY_our |
| 2146 | ? "our" |
| 2147 | : PL_parser->in_my == KEY_state ? "state" : "my")); |
| 2148 | } else if (attrs) { |
| 2149 | GV * const gv = cGVOPx_gv(cUNOPo->op_first); |
| 2150 | PL_parser->in_my = FALSE; |
| 2151 | PL_parser->in_my_stash = NULL; |
| 2152 | apply_attrs(GvSTASH(gv), |
| 2153 | (type == OP_RV2SV ? GvSV(gv) : |
| 2154 | type == OP_RV2AV ? MUTABLE_SV(GvAV(gv)) : |
| 2155 | type == OP_RV2HV ? MUTABLE_SV(GvHV(gv)) : MUTABLE_SV(gv)), |
| 2156 | attrs, FALSE); |
| 2157 | } |
| 2158 | o->op_private |= OPpOUR_INTRO; |
| 2159 | return o; |
| 2160 | } |
| 2161 | else if (type != OP_PADSV && |
| 2162 | type != OP_PADAV && |
| 2163 | type != OP_PADHV && |
| 2164 | type != OP_PUSHMARK) |
| 2165 | { |
| 2166 | yyerror(Perl_form(aTHX_ "Can't declare %s in \"%s\"", |
| 2167 | OP_DESC(o), |
| 2168 | PL_parser->in_my == KEY_our |
| 2169 | ? "our" |
| 2170 | : PL_parser->in_my == KEY_state ? "state" : "my")); |
| 2171 | return o; |
| 2172 | } |
| 2173 | else if (attrs && type != OP_PUSHMARK) { |
| 2174 | HV *stash; |
| 2175 | |
| 2176 | PL_parser->in_my = FALSE; |
| 2177 | PL_parser->in_my_stash = NULL; |
| 2178 | |
| 2179 | /* check for C<my Dog $spot> when deciding package */ |
| 2180 | stash = PAD_COMPNAME_TYPE(o->op_targ); |
| 2181 | if (!stash) |
| 2182 | stash = PL_curstash; |
| 2183 | apply_attrs_my(stash, o, attrs, imopsp); |
| 2184 | } |
| 2185 | o->op_flags |= OPf_MOD; |
| 2186 | o->op_private |= OPpLVAL_INTRO; |
| 2187 | if (PL_parser->in_my == KEY_state) |
| 2188 | o->op_private |= OPpPAD_STATE; |
| 2189 | return o; |
| 2190 | } |
| 2191 | |
| 2192 | OP * |
| 2193 | Perl_my_attrs(pTHX_ OP *o, OP *attrs) |
| 2194 | { |
| 2195 | dVAR; |
| 2196 | OP *rops; |
| 2197 | int maybe_scalar = 0; |
| 2198 | |
| 2199 | PERL_ARGS_ASSERT_MY_ATTRS; |
| 2200 | |
| 2201 | /* [perl #17376]: this appears to be premature, and results in code such as |
| 2202 | C< our(%x); > executing in list mode rather than void mode */ |
| 2203 | #if 0 |
| 2204 | if (o->op_flags & OPf_PARENS) |
| 2205 | list(o); |
| 2206 | else |
| 2207 | maybe_scalar = 1; |
| 2208 | #else |
| 2209 | maybe_scalar = 1; |
| 2210 | #endif |
| 2211 | if (attrs) |
| 2212 | SAVEFREEOP(attrs); |
| 2213 | rops = NULL; |
| 2214 | o = my_kid(o, attrs, &rops); |
| 2215 | if (rops) { |
| 2216 | if (maybe_scalar && o->op_type == OP_PADSV) { |
| 2217 | o = scalar(op_append_list(OP_LIST, rops, o)); |
| 2218 | o->op_private |= OPpLVAL_INTRO; |
| 2219 | } |
| 2220 | else |
| 2221 | o = op_append_list(OP_LIST, o, rops); |
| 2222 | } |
| 2223 | PL_parser->in_my = FALSE; |
| 2224 | PL_parser->in_my_stash = NULL; |
| 2225 | return o; |
| 2226 | } |
| 2227 | |
| 2228 | OP * |
| 2229 | Perl_sawparens(pTHX_ OP *o) |
| 2230 | { |
| 2231 | PERL_UNUSED_CONTEXT; |
| 2232 | if (o) |
| 2233 | o->op_flags |= OPf_PARENS; |
| 2234 | return o; |
| 2235 | } |
| 2236 | |
| 2237 | OP * |
| 2238 | Perl_bind_match(pTHX_ I32 type, OP *left, OP *right) |
| 2239 | { |
| 2240 | OP *o; |
| 2241 | bool ismatchop = 0; |
| 2242 | const OPCODE ltype = left->op_type; |
| 2243 | const OPCODE rtype = right->op_type; |
| 2244 | |
| 2245 | PERL_ARGS_ASSERT_BIND_MATCH; |
| 2246 | |
| 2247 | if ( (ltype == OP_RV2AV || ltype == OP_RV2HV || ltype == OP_PADAV |
| 2248 | || ltype == OP_PADHV) && ckWARN(WARN_MISC)) |
| 2249 | { |
| 2250 | const char * const desc |
| 2251 | = PL_op_desc[(rtype == OP_SUBST || rtype == OP_TRANS) |
| 2252 | ? (int)rtype : OP_MATCH]; |
| 2253 | const char * const sample = ((ltype == OP_RV2AV || ltype == OP_PADAV) |
| 2254 | ? "@array" : "%hash"); |
| 2255 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
| 2256 | "Applying %s to %s will act on scalar(%s)", |
| 2257 | desc, sample, sample); |
| 2258 | } |
| 2259 | |
| 2260 | if (rtype == OP_CONST && |
| 2261 | cSVOPx(right)->op_private & OPpCONST_BARE && |
| 2262 | cSVOPx(right)->op_private & OPpCONST_STRICT) |
| 2263 | { |
| 2264 | no_bareword_allowed(right); |
| 2265 | } |
| 2266 | |
| 2267 | /* !~ doesn't make sense with s///r, so error on it for now */ |
| 2268 | if (rtype == OP_SUBST && (cPMOPx(right)->op_pmflags & PMf_NONDESTRUCT) && |
| 2269 | type == OP_NOT) |
| 2270 | yyerror("Using !~ with s///r doesn't make sense"); |
| 2271 | |
| 2272 | ismatchop = (rtype == OP_MATCH || |
| 2273 | rtype == OP_SUBST || |
| 2274 | rtype == OP_TRANS) |
| 2275 | && !(right->op_flags & OPf_SPECIAL); |
| 2276 | if (ismatchop && right->op_private & OPpTARGET_MY) { |
| 2277 | right->op_targ = 0; |
| 2278 | right->op_private &= ~OPpTARGET_MY; |
| 2279 | } |
| 2280 | if (!(right->op_flags & OPf_STACKED) && ismatchop) { |
| 2281 | OP *newleft; |
| 2282 | |
| 2283 | right->op_flags |= OPf_STACKED; |
| 2284 | if (rtype != OP_MATCH && |
| 2285 | ! (rtype == OP_TRANS && |
| 2286 | right->op_private & OPpTRANS_IDENTICAL) && |
| 2287 | ! (rtype == OP_SUBST && |
| 2288 | (cPMOPx(right)->op_pmflags & PMf_NONDESTRUCT))) |
| 2289 | newleft = mod(left, rtype); |
| 2290 | else |
| 2291 | newleft = left; |
| 2292 | if (right->op_type == OP_TRANS) |
| 2293 | o = newBINOP(OP_NULL, OPf_STACKED, scalar(newleft), right); |
| 2294 | else |
| 2295 | o = op_prepend_elem(rtype, scalar(newleft), right); |
| 2296 | if (type == OP_NOT) |
| 2297 | return newUNOP(OP_NOT, 0, scalar(o)); |
| 2298 | return o; |
| 2299 | } |
| 2300 | else |
| 2301 | return bind_match(type, left, |
| 2302 | pmruntime(newPMOP(OP_MATCH, 0), right, 0)); |
| 2303 | } |
| 2304 | |
| 2305 | OP * |
| 2306 | Perl_invert(pTHX_ OP *o) |
| 2307 | { |
| 2308 | if (!o) |
| 2309 | return NULL; |
| 2310 | return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o)); |
| 2311 | } |
| 2312 | |
| 2313 | OP * |
| 2314 | Perl_scope(pTHX_ OP *o) |
| 2315 | { |
| 2316 | dVAR; |
| 2317 | if (o) { |
| 2318 | if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) { |
| 2319 | o = op_prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o); |
| 2320 | o->op_type = OP_LEAVE; |
| 2321 | o->op_ppaddr = PL_ppaddr[OP_LEAVE]; |
| 2322 | } |
| 2323 | else if (o->op_type == OP_LINESEQ) { |
| 2324 | OP *kid; |
| 2325 | o->op_type = OP_SCOPE; |
| 2326 | o->op_ppaddr = PL_ppaddr[OP_SCOPE]; |
| 2327 | kid = ((LISTOP*)o)->op_first; |
| 2328 | if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) { |
| 2329 | op_null(kid); |
| 2330 | |
| 2331 | /* The following deals with things like 'do {1 for 1}' */ |
| 2332 | kid = kid->op_sibling; |
| 2333 | if (kid && |
| 2334 | (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE)) |
| 2335 | op_null(kid); |
| 2336 | } |
| 2337 | } |
| 2338 | else |
| 2339 | o = newLISTOP(OP_SCOPE, 0, o, NULL); |
| 2340 | } |
| 2341 | return o; |
| 2342 | } |
| 2343 | |
| 2344 | int |
| 2345 | Perl_block_start(pTHX_ int full) |
| 2346 | { |
| 2347 | dVAR; |
| 2348 | const int retval = PL_savestack_ix; |
| 2349 | |
| 2350 | pad_block_start(full); |
| 2351 | SAVEHINTS(); |
| 2352 | PL_hints &= ~HINT_BLOCK_SCOPE; |
| 2353 | SAVECOMPILEWARNINGS(); |
| 2354 | PL_compiling.cop_warnings = DUP_WARNINGS(PL_compiling.cop_warnings); |
| 2355 | |
| 2356 | CALL_BLOCK_HOOKS(bhk_start, full); |
| 2357 | |
| 2358 | return retval; |
| 2359 | } |
| 2360 | |
| 2361 | OP* |
| 2362 | Perl_block_end(pTHX_ I32 floor, OP *seq) |
| 2363 | { |
| 2364 | dVAR; |
| 2365 | const int needblockscope = PL_hints & HINT_BLOCK_SCOPE; |
| 2366 | OP* retval = scalarseq(seq); |
| 2367 | |
| 2368 | CALL_BLOCK_HOOKS(bhk_pre_end, &retval); |
| 2369 | |
| 2370 | LEAVE_SCOPE(floor); |
| 2371 | CopHINTS_set(&PL_compiling, PL_hints); |
| 2372 | if (needblockscope) |
| 2373 | PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */ |
| 2374 | pad_leavemy(); |
| 2375 | |
| 2376 | CALL_BLOCK_HOOKS(bhk_post_end, &retval); |
| 2377 | |
| 2378 | return retval; |
| 2379 | } |
| 2380 | |
| 2381 | /* |
| 2382 | =head1 Compile-time scope hooks |
| 2383 | |
| 2384 | =for apidoc Ao||blockhook_register |
| 2385 | |
| 2386 | Register a set of hooks to be called when the Perl lexical scope changes |
| 2387 | at compile time. See L<perlguts/"Compile-time scope hooks">. |
| 2388 | |
| 2389 | =cut |
| 2390 | */ |
| 2391 | |
| 2392 | void |
| 2393 | Perl_blockhook_register(pTHX_ BHK *hk) |
| 2394 | { |
| 2395 | PERL_ARGS_ASSERT_BLOCKHOOK_REGISTER; |
| 2396 | |
| 2397 | Perl_av_create_and_push(aTHX_ &PL_blockhooks, newSViv(PTR2IV(hk))); |
| 2398 | } |
| 2399 | |
| 2400 | STATIC OP * |
| 2401 | S_newDEFSVOP(pTHX) |
| 2402 | { |
| 2403 | dVAR; |
| 2404 | const PADOFFSET offset = Perl_pad_findmy(aTHX_ STR_WITH_LEN("$_"), 0); |
| 2405 | if (offset == NOT_IN_PAD || PAD_COMPNAME_FLAGS_isOUR(offset)) { |
| 2406 | return newSVREF(newGVOP(OP_GV, 0, PL_defgv)); |
| 2407 | } |
| 2408 | else { |
| 2409 | OP * const o = newOP(OP_PADSV, 0); |
| 2410 | o->op_targ = offset; |
| 2411 | return o; |
| 2412 | } |
| 2413 | } |
| 2414 | |
| 2415 | void |
| 2416 | Perl_newPROG(pTHX_ OP *o) |
| 2417 | { |
| 2418 | dVAR; |
| 2419 | |
| 2420 | PERL_ARGS_ASSERT_NEWPROG; |
| 2421 | |
| 2422 | if (PL_in_eval) { |
| 2423 | if (PL_eval_root) |
| 2424 | return; |
| 2425 | PL_eval_root = newUNOP(OP_LEAVEEVAL, |
| 2426 | ((PL_in_eval & EVAL_KEEPERR) |
| 2427 | ? OPf_SPECIAL : 0), o); |
| 2428 | /* don't use LINKLIST, since PL_eval_root might indirect through |
| 2429 | * a rather expensive function call and LINKLIST evaluates its |
| 2430 | * argument more than once */ |
| 2431 | PL_eval_start = op_linklist(PL_eval_root); |
| 2432 | PL_eval_root->op_private |= OPpREFCOUNTED; |
| 2433 | OpREFCNT_set(PL_eval_root, 1); |
| 2434 | PL_eval_root->op_next = 0; |
| 2435 | CALL_PEEP(PL_eval_start); |
| 2436 | } |
| 2437 | else { |
| 2438 | if (o->op_type == OP_STUB) { |
| 2439 | PL_comppad_name = 0; |
| 2440 | PL_compcv = 0; |
| 2441 | S_op_destroy(aTHX_ o); |
| 2442 | return; |
| 2443 | } |
| 2444 | PL_main_root = scope(sawparens(scalarvoid(o))); |
| 2445 | PL_curcop = &PL_compiling; |
| 2446 | PL_main_start = LINKLIST(PL_main_root); |
| 2447 | PL_main_root->op_private |= OPpREFCOUNTED; |
| 2448 | OpREFCNT_set(PL_main_root, 1); |
| 2449 | PL_main_root->op_next = 0; |
| 2450 | CALL_PEEP(PL_main_start); |
| 2451 | PL_compcv = 0; |
| 2452 | |
| 2453 | /* Register with debugger */ |
| 2454 | if (PERLDB_INTER) { |
| 2455 | CV * const cv = get_cvs("DB::postponed", 0); |
| 2456 | if (cv) { |
| 2457 | dSP; |
| 2458 | PUSHMARK(SP); |
| 2459 | XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling))); |
| 2460 | PUTBACK; |
| 2461 | call_sv(MUTABLE_SV(cv), G_DISCARD); |
| 2462 | } |
| 2463 | } |
| 2464 | } |
| 2465 | } |
| 2466 | |
| 2467 | OP * |
| 2468 | Perl_localize(pTHX_ OP *o, I32 lex) |
| 2469 | { |
| 2470 | dVAR; |
| 2471 | |
| 2472 | PERL_ARGS_ASSERT_LOCALIZE; |
| 2473 | |
| 2474 | if (o->op_flags & OPf_PARENS) |
| 2475 | /* [perl #17376]: this appears to be premature, and results in code such as |
| 2476 | C< our(%x); > executing in list mode rather than void mode */ |
| 2477 | #if 0 |
| 2478 | list(o); |
| 2479 | #else |
| 2480 | NOOP; |
| 2481 | #endif |
| 2482 | else { |
| 2483 | if ( PL_parser->bufptr > PL_parser->oldbufptr |
| 2484 | && PL_parser->bufptr[-1] == ',' |
| 2485 | && ckWARN(WARN_PARENTHESIS)) |
| 2486 | { |
| 2487 | char *s = PL_parser->bufptr; |
| 2488 | bool sigil = FALSE; |
| 2489 | |
| 2490 | /* some heuristics to detect a potential error */ |
| 2491 | while (*s && (strchr(", \t\n", *s))) |
| 2492 | s++; |
| 2493 | |
| 2494 | while (1) { |
| 2495 | if (*s && strchr("@$%*", *s) && *++s |
| 2496 | && (isALNUM(*s) || UTF8_IS_CONTINUED(*s))) { |
| 2497 | s++; |
| 2498 | sigil = TRUE; |
| 2499 | while (*s && (isALNUM(*s) || UTF8_IS_CONTINUED(*s))) |
| 2500 | s++; |
| 2501 | while (*s && (strchr(", \t\n", *s))) |
| 2502 | s++; |
| 2503 | } |
| 2504 | else |
| 2505 | break; |
| 2506 | } |
| 2507 | if (sigil && (*s == ';' || *s == '=')) { |
| 2508 | Perl_warner(aTHX_ packWARN(WARN_PARENTHESIS), |
| 2509 | "Parentheses missing around \"%s\" list", |
| 2510 | lex |
| 2511 | ? (PL_parser->in_my == KEY_our |
| 2512 | ? "our" |
| 2513 | : PL_parser->in_my == KEY_state |
| 2514 | ? "state" |
| 2515 | : "my") |
| 2516 | : "local"); |
| 2517 | } |
| 2518 | } |
| 2519 | } |
| 2520 | if (lex) |
| 2521 | o = my(o); |
| 2522 | else |
| 2523 | o = mod(o, OP_NULL); /* a bit kludgey */ |
| 2524 | PL_parser->in_my = FALSE; |
| 2525 | PL_parser->in_my_stash = NULL; |
| 2526 | return o; |
| 2527 | } |
| 2528 | |
| 2529 | OP * |
| 2530 | Perl_jmaybe(pTHX_ OP *o) |
| 2531 | { |
| 2532 | PERL_ARGS_ASSERT_JMAYBE; |
| 2533 | |
| 2534 | if (o->op_type == OP_LIST) { |
| 2535 | OP * const o2 |
| 2536 | = newSVREF(newGVOP(OP_GV, 0, gv_fetchpvs(";", GV_ADD|GV_NOTQUAL, SVt_PV))); |
| 2537 | o = convert(OP_JOIN, 0, op_prepend_elem(OP_LIST, o2, o)); |
| 2538 | } |
| 2539 | return o; |
| 2540 | } |
| 2541 | |
| 2542 | static OP * |
| 2543 | S_fold_constants(pTHX_ register OP *o) |
| 2544 | { |
| 2545 | dVAR; |
| 2546 | register OP * VOL curop; |
| 2547 | OP *newop; |
| 2548 | VOL I32 type = o->op_type; |
| 2549 | SV * VOL sv = NULL; |
| 2550 | int ret = 0; |
| 2551 | I32 oldscope; |
| 2552 | OP *old_next; |
| 2553 | SV * const oldwarnhook = PL_warnhook; |
| 2554 | SV * const olddiehook = PL_diehook; |
| 2555 | COP not_compiling; |
| 2556 | dJMPENV; |
| 2557 | |
| 2558 | PERL_ARGS_ASSERT_FOLD_CONSTANTS; |
| 2559 | |
| 2560 | if (PL_opargs[type] & OA_RETSCALAR) |
| 2561 | scalar(o); |
| 2562 | if (PL_opargs[type] & OA_TARGET && !o->op_targ) |
| 2563 | o->op_targ = pad_alloc(type, SVs_PADTMP); |
| 2564 | |
| 2565 | /* integerize op, unless it happens to be C<-foo>. |
| 2566 | * XXX should pp_i_negate() do magic string negation instead? */ |
| 2567 | if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER) |
| 2568 | && !(type == OP_NEGATE && cUNOPo->op_first->op_type == OP_CONST |
| 2569 | && (cUNOPo->op_first->op_private & OPpCONST_BARE))) |
| 2570 | { |
| 2571 | o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)]; |
| 2572 | } |
| 2573 | |
| 2574 | if (!(PL_opargs[type] & OA_FOLDCONST)) |
| 2575 | goto nope; |
| 2576 | |
| 2577 | switch (type) { |
| 2578 | case OP_NEGATE: |
| 2579 | /* XXX might want a ck_negate() for this */ |
| 2580 | cUNOPo->op_first->op_private &= ~OPpCONST_STRICT; |
| 2581 | break; |
| 2582 | case OP_UCFIRST: |
| 2583 | case OP_LCFIRST: |
| 2584 | case OP_UC: |
| 2585 | case OP_LC: |
| 2586 | case OP_SLT: |
| 2587 | case OP_SGT: |
| 2588 | case OP_SLE: |
| 2589 | case OP_SGE: |
| 2590 | case OP_SCMP: |
| 2591 | /* XXX what about the numeric ops? */ |
| 2592 | if (PL_hints & HINT_LOCALE) |
| 2593 | goto nope; |
| 2594 | break; |
| 2595 | } |
| 2596 | |
| 2597 | if (PL_parser && PL_parser->error_count) |
| 2598 | goto nope; /* Don't try to run w/ errors */ |
| 2599 | |
| 2600 | for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) { |
| 2601 | const OPCODE type = curop->op_type; |
| 2602 | if ((type != OP_CONST || (curop->op_private & OPpCONST_BARE)) && |
| 2603 | type != OP_LIST && |
| 2604 | type != OP_SCALAR && |
| 2605 | type != OP_NULL && |
| 2606 | type != OP_PUSHMARK) |
| 2607 | { |
| 2608 | goto nope; |
| 2609 | } |
| 2610 | } |
| 2611 | |
| 2612 | curop = LINKLIST(o); |
| 2613 | old_next = o->op_next; |
| 2614 | o->op_next = 0; |
| 2615 | PL_op = curop; |
| 2616 | |
| 2617 | oldscope = PL_scopestack_ix; |
| 2618 | create_eval_scope(G_FAKINGEVAL); |
| 2619 | |
| 2620 | /* Verify that we don't need to save it: */ |
| 2621 | assert(PL_curcop == &PL_compiling); |
| 2622 | StructCopy(&PL_compiling, ¬_compiling, COP); |
| 2623 | PL_curcop = ¬_compiling; |
| 2624 | /* The above ensures that we run with all the correct hints of the |
| 2625 | currently compiling COP, but that IN_PERL_RUNTIME is not true. */ |
| 2626 | assert(IN_PERL_RUNTIME); |
| 2627 | PL_warnhook = PERL_WARNHOOK_FATAL; |
| 2628 | PL_diehook = NULL; |
| 2629 | JMPENV_PUSH(ret); |
| 2630 | |
| 2631 | switch (ret) { |
| 2632 | case 0: |
| 2633 | CALLRUNOPS(aTHX); |
| 2634 | sv = *(PL_stack_sp--); |
| 2635 | if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */ |
| 2636 | pad_swipe(o->op_targ, FALSE); |
| 2637 | else if (SvTEMP(sv)) { /* grab mortal temp? */ |
| 2638 | SvREFCNT_inc_simple_void(sv); |
| 2639 | SvTEMP_off(sv); |
| 2640 | } |
| 2641 | break; |
| 2642 | case 3: |
| 2643 | /* Something tried to die. Abandon constant folding. */ |
| 2644 | /* Pretend the error never happened. */ |
| 2645 | CLEAR_ERRSV(); |
| 2646 | o->op_next = old_next; |
| 2647 | break; |
| 2648 | default: |
| 2649 | JMPENV_POP; |
| 2650 | /* Don't expect 1 (setjmp failed) or 2 (something called my_exit) */ |
| 2651 | PL_warnhook = oldwarnhook; |
| 2652 | PL_diehook = olddiehook; |
| 2653 | /* XXX note that this croak may fail as we've already blown away |
| 2654 | * the stack - eg any nested evals */ |
| 2655 | Perl_croak(aTHX_ "panic: fold_constants JMPENV_PUSH returned %d", ret); |
| 2656 | } |
| 2657 | JMPENV_POP; |
| 2658 | PL_warnhook = oldwarnhook; |
| 2659 | PL_diehook = olddiehook; |
| 2660 | PL_curcop = &PL_compiling; |
| 2661 | |
| 2662 | if (PL_scopestack_ix > oldscope) |
| 2663 | delete_eval_scope(); |
| 2664 | |
| 2665 | if (ret) |
| 2666 | goto nope; |
| 2667 | |
| 2668 | #ifndef PERL_MAD |
| 2669 | op_free(o); |
| 2670 | #endif |
| 2671 | assert(sv); |
| 2672 | if (type == OP_RV2GV) |
| 2673 | newop = newGVOP(OP_GV, 0, MUTABLE_GV(sv)); |
| 2674 | else |
| 2675 | newop = newSVOP(OP_CONST, 0, MUTABLE_SV(sv)); |
| 2676 | op_getmad(o,newop,'f'); |
| 2677 | return newop; |
| 2678 | |
| 2679 | nope: |
| 2680 | return o; |
| 2681 | } |
| 2682 | |
| 2683 | static OP * |
| 2684 | S_gen_constant_list(pTHX_ register OP *o) |
| 2685 | { |
| 2686 | dVAR; |
| 2687 | register OP *curop; |
| 2688 | const I32 oldtmps_floor = PL_tmps_floor; |
| 2689 | |
| 2690 | list(o); |
| 2691 | if (PL_parser && PL_parser->error_count) |
| 2692 | return o; /* Don't attempt to run with errors */ |
| 2693 | |
| 2694 | PL_op = curop = LINKLIST(o); |
| 2695 | o->op_next = 0; |
| 2696 | CALL_PEEP(curop); |
| 2697 | pp_pushmark(); |
| 2698 | CALLRUNOPS(aTHX); |
| 2699 | PL_op = curop; |
| 2700 | assert (!(curop->op_flags & OPf_SPECIAL)); |
| 2701 | assert(curop->op_type == OP_RANGE); |
| 2702 | pp_anonlist(); |
| 2703 | PL_tmps_floor = oldtmps_floor; |
| 2704 | |
| 2705 | o->op_type = OP_RV2AV; |
| 2706 | o->op_ppaddr = PL_ppaddr[OP_RV2AV]; |
| 2707 | o->op_flags &= ~OPf_REF; /* treat \(1..2) like an ordinary list */ |
| 2708 | o->op_flags |= OPf_PARENS; /* and flatten \(1..2,3) */ |
| 2709 | o->op_opt = 0; /* needs to be revisited in rpeep() */ |
| 2710 | curop = ((UNOP*)o)->op_first; |
| 2711 | ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc_NN(*PL_stack_sp--)); |
| 2712 | #ifdef PERL_MAD |
| 2713 | op_getmad(curop,o,'O'); |
| 2714 | #else |
| 2715 | op_free(curop); |
| 2716 | #endif |
| 2717 | LINKLIST(o); |
| 2718 | return list(o); |
| 2719 | } |
| 2720 | |
| 2721 | OP * |
| 2722 | Perl_convert(pTHX_ I32 type, I32 flags, OP *o) |
| 2723 | { |
| 2724 | dVAR; |
| 2725 | if (!o || o->op_type != OP_LIST) |
| 2726 | o = newLISTOP(OP_LIST, 0, o, NULL); |
| 2727 | else |
| 2728 | o->op_flags &= ~OPf_WANT; |
| 2729 | |
| 2730 | if (!(PL_opargs[type] & OA_MARK)) |
| 2731 | op_null(cLISTOPo->op_first); |
| 2732 | |
| 2733 | o->op_type = (OPCODE)type; |
| 2734 | o->op_ppaddr = PL_ppaddr[type]; |
| 2735 | o->op_flags |= flags; |
| 2736 | |
| 2737 | o = CHECKOP(type, o); |
| 2738 | if (o->op_type != (unsigned)type) |
| 2739 | return o; |
| 2740 | |
| 2741 | return fold_constants(o); |
| 2742 | } |
| 2743 | |
| 2744 | /* |
| 2745 | =head1 Optree Manipulation Functions |
| 2746 | */ |
| 2747 | |
| 2748 | /* List constructors */ |
| 2749 | |
| 2750 | /* |
| 2751 | =for apidoc Am|OP *|op_append_elem|I32 optype|OP *first|OP *last |
| 2752 | |
| 2753 | Append an item to the list of ops contained directly within a list-type |
| 2754 | op, returning the lengthened list. I<first> is the list-type op, |
| 2755 | and I<last> is the op to append to the list. I<optype> specifies the |
| 2756 | intended opcode for the list. If I<first> is not already a list of the |
| 2757 | right type, it will be upgraded into one. If either I<first> or I<last> |
| 2758 | is null, the other is returned unchanged. |
| 2759 | |
| 2760 | =cut |
| 2761 | */ |
| 2762 | |
| 2763 | OP * |
| 2764 | Perl_op_append_elem(pTHX_ I32 type, OP *first, OP *last) |
| 2765 | { |
| 2766 | if (!first) |
| 2767 | return last; |
| 2768 | |
| 2769 | if (!last) |
| 2770 | return first; |
| 2771 | |
| 2772 | if (first->op_type != (unsigned)type |
| 2773 | || (type == OP_LIST && (first->op_flags & OPf_PARENS))) |
| 2774 | { |
| 2775 | return newLISTOP(type, 0, first, last); |
| 2776 | } |
| 2777 | |
| 2778 | if (first->op_flags & OPf_KIDS) |
| 2779 | ((LISTOP*)first)->op_last->op_sibling = last; |
| 2780 | else { |
| 2781 | first->op_flags |= OPf_KIDS; |
| 2782 | ((LISTOP*)first)->op_first = last; |
| 2783 | } |
| 2784 | ((LISTOP*)first)->op_last = last; |
| 2785 | return first; |
| 2786 | } |
| 2787 | |
| 2788 | /* |
| 2789 | =for apidoc Am|OP *|op_append_list|I32 optype|OP *first|OP *last |
| 2790 | |
| 2791 | Concatenate the lists of ops contained directly within two list-type ops, |
| 2792 | returning the combined list. I<first> and I<last> are the list-type ops |
| 2793 | to concatenate. I<optype> specifies the intended opcode for the list. |
| 2794 | If either I<first> or I<last> is not already a list of the right type, |
| 2795 | it will be upgraded into one. If either I<first> or I<last> is null, |
| 2796 | the other is returned unchanged. |
| 2797 | |
| 2798 | =cut |
| 2799 | */ |
| 2800 | |
| 2801 | OP * |
| 2802 | Perl_op_append_list(pTHX_ I32 type, OP *first, OP *last) |
| 2803 | { |
| 2804 | if (!first) |
| 2805 | return last; |
| 2806 | |
| 2807 | if (!last) |
| 2808 | return first; |
| 2809 | |
| 2810 | if (first->op_type != (unsigned)type) |
| 2811 | return op_prepend_elem(type, first, last); |
| 2812 | |
| 2813 | if (last->op_type != (unsigned)type) |
| 2814 | return op_append_elem(type, first, last); |
| 2815 | |
| 2816 | ((LISTOP*)first)->op_last->op_sibling = ((LISTOP*)last)->op_first; |
| 2817 | ((LISTOP*)first)->op_last = ((LISTOP*)last)->op_last; |
| 2818 | first->op_flags |= (last->op_flags & OPf_KIDS); |
| 2819 | |
| 2820 | #ifdef PERL_MAD |
| 2821 | if (((LISTOP*)last)->op_first && first->op_madprop) { |
| 2822 | MADPROP *mp = ((LISTOP*)last)->op_first->op_madprop; |
| 2823 | if (mp) { |
| 2824 | while (mp->mad_next) |
| 2825 | mp = mp->mad_next; |
| 2826 | mp->mad_next = first->op_madprop; |
| 2827 | } |
| 2828 | else { |
| 2829 | ((LISTOP*)last)->op_first->op_madprop = first->op_madprop; |
| 2830 | } |
| 2831 | } |
| 2832 | first->op_madprop = last->op_madprop; |
| 2833 | last->op_madprop = 0; |
| 2834 | #endif |
| 2835 | |
| 2836 | S_op_destroy(aTHX_ last); |
| 2837 | |
| 2838 | return first; |
| 2839 | } |
| 2840 | |
| 2841 | /* |
| 2842 | =for apidoc Am|OP *|op_prepend_elem|I32 optype|OP *first|OP *last |
| 2843 | |
| 2844 | Prepend an item to the list of ops contained directly within a list-type |
| 2845 | op, returning the lengthened list. I<first> is the op to prepend to the |
| 2846 | list, and I<last> is the list-type op. I<optype> specifies the intended |
| 2847 | opcode for the list. If I<last> is not already a list of the right type, |
| 2848 | it will be upgraded into one. If either I<first> or I<last> is null, |
| 2849 | the other is returned unchanged. |
| 2850 | |
| 2851 | =cut |
| 2852 | */ |
| 2853 | |
| 2854 | OP * |
| 2855 | Perl_op_prepend_elem(pTHX_ I32 type, OP *first, OP *last) |
| 2856 | { |
| 2857 | if (!first) |
| 2858 | return last; |
| 2859 | |
| 2860 | if (!last) |
| 2861 | return first; |
| 2862 | |
| 2863 | if (last->op_type == (unsigned)type) { |
| 2864 | if (type == OP_LIST) { /* already a PUSHMARK there */ |
| 2865 | first->op_sibling = ((LISTOP*)last)->op_first->op_sibling; |
| 2866 | ((LISTOP*)last)->op_first->op_sibling = first; |
| 2867 | if (!(first->op_flags & OPf_PARENS)) |
| 2868 | last->op_flags &= ~OPf_PARENS; |
| 2869 | } |
| 2870 | else { |
| 2871 | if (!(last->op_flags & OPf_KIDS)) { |
| 2872 | ((LISTOP*)last)->op_last = first; |
| 2873 | last->op_flags |= OPf_KIDS; |
| 2874 | } |
| 2875 | first->op_sibling = ((LISTOP*)last)->op_first; |
| 2876 | ((LISTOP*)last)->op_first = first; |
| 2877 | } |
| 2878 | last->op_flags |= OPf_KIDS; |
| 2879 | return last; |
| 2880 | } |
| 2881 | |
| 2882 | return newLISTOP(type, 0, first, last); |
| 2883 | } |
| 2884 | |
| 2885 | /* Constructors */ |
| 2886 | |
| 2887 | #ifdef PERL_MAD |
| 2888 | |
| 2889 | TOKEN * |
| 2890 | Perl_newTOKEN(pTHX_ I32 optype, YYSTYPE lval, MADPROP* madprop) |
| 2891 | { |
| 2892 | TOKEN *tk; |
| 2893 | Newxz(tk, 1, TOKEN); |
| 2894 | tk->tk_type = (OPCODE)optype; |
| 2895 | tk->tk_type = 12345; |
| 2896 | tk->tk_lval = lval; |
| 2897 | tk->tk_mad = madprop; |
| 2898 | return tk; |
| 2899 | } |
| 2900 | |
| 2901 | void |
| 2902 | Perl_token_free(pTHX_ TOKEN* tk) |
| 2903 | { |
| 2904 | PERL_ARGS_ASSERT_TOKEN_FREE; |
| 2905 | |
| 2906 | if (tk->tk_type != 12345) |
| 2907 | return; |
| 2908 | mad_free(tk->tk_mad); |
| 2909 | Safefree(tk); |
| 2910 | } |
| 2911 | |
| 2912 | void |
| 2913 | Perl_token_getmad(pTHX_ TOKEN* tk, OP* o, char slot) |
| 2914 | { |
| 2915 | MADPROP* mp; |
| 2916 | MADPROP* tm; |
| 2917 | |
| 2918 | PERL_ARGS_ASSERT_TOKEN_GETMAD; |
| 2919 | |
| 2920 | if (tk->tk_type != 12345) { |
| 2921 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
| 2922 | "Invalid TOKEN object ignored"); |
| 2923 | return; |
| 2924 | } |
| 2925 | tm = tk->tk_mad; |
| 2926 | if (!tm) |
| 2927 | return; |
| 2928 | |
| 2929 | /* faked up qw list? */ |
| 2930 | if (slot == '(' && |
| 2931 | tm->mad_type == MAD_SV && |
| 2932 | SvPVX((SV *)tm->mad_val)[0] == 'q') |
| 2933 | slot = 'x'; |
| 2934 | |
| 2935 | if (o) { |
| 2936 | mp = o->op_madprop; |
| 2937 | if (mp) { |
| 2938 | for (;;) { |
| 2939 | /* pretend constant fold didn't happen? */ |
| 2940 | if (mp->mad_key == 'f' && |
| 2941 | (o->op_type == OP_CONST || |
| 2942 | o->op_type == OP_GV) ) |
| 2943 | { |
| 2944 | token_getmad(tk,(OP*)mp->mad_val,slot); |
| 2945 | return; |
| 2946 | } |
| 2947 | if (!mp->mad_next) |
| 2948 | break; |
| 2949 | mp = mp->mad_next; |
| 2950 | } |
| 2951 | mp->mad_next = tm; |
| 2952 | mp = mp->mad_next; |
| 2953 | } |
| 2954 | else { |
| 2955 | o->op_madprop = tm; |
| 2956 | mp = o->op_madprop; |
| 2957 | } |
| 2958 | if (mp->mad_key == 'X') |
| 2959 | mp->mad_key = slot; /* just change the first one */ |
| 2960 | |
| 2961 | tk->tk_mad = 0; |
| 2962 | } |
| 2963 | else |
| 2964 | mad_free(tm); |
| 2965 | Safefree(tk); |
| 2966 | } |
| 2967 | |
| 2968 | void |
| 2969 | Perl_op_getmad_weak(pTHX_ OP* from, OP* o, char slot) |
| 2970 | { |
| 2971 | MADPROP* mp; |
| 2972 | if (!from) |
| 2973 | return; |
| 2974 | if (o) { |
| 2975 | mp = o->op_madprop; |
| 2976 | if (mp) { |
| 2977 | for (;;) { |
| 2978 | /* pretend constant fold didn't happen? */ |
| 2979 | if (mp->mad_key == 'f' && |
| 2980 | (o->op_type == OP_CONST || |
| 2981 | o->op_type == OP_GV) ) |
| 2982 | { |
| 2983 | op_getmad(from,(OP*)mp->mad_val,slot); |
| 2984 | return; |
| 2985 | } |
| 2986 | if (!mp->mad_next) |
| 2987 | break; |
| 2988 | mp = mp->mad_next; |
| 2989 | } |
| 2990 | mp->mad_next = newMADPROP(slot,MAD_OP,from,0); |
| 2991 | } |
| 2992 | else { |
| 2993 | o->op_madprop = newMADPROP(slot,MAD_OP,from,0); |
| 2994 | } |
| 2995 | } |
| 2996 | } |
| 2997 | |
| 2998 | void |
| 2999 | Perl_op_getmad(pTHX_ OP* from, OP* o, char slot) |
| 3000 | { |
| 3001 | MADPROP* mp; |
| 3002 | if (!from) |
| 3003 | return; |
| 3004 | if (o) { |
| 3005 | mp = o->op_madprop; |
| 3006 | if (mp) { |
| 3007 | for (;;) { |
| 3008 | /* pretend constant fold didn't happen? */ |
| 3009 | if (mp->mad_key == 'f' && |
| 3010 | (o->op_type == OP_CONST || |
| 3011 | o->op_type == OP_GV) ) |
| 3012 | { |
| 3013 | op_getmad(from,(OP*)mp->mad_val,slot); |
| 3014 | return; |
| 3015 | } |
| 3016 | if (!mp->mad_next) |
| 3017 | break; |
| 3018 | mp = mp->mad_next; |
| 3019 | } |
| 3020 | mp->mad_next = newMADPROP(slot,MAD_OP,from,1); |
| 3021 | } |
| 3022 | else { |
| 3023 | o->op_madprop = newMADPROP(slot,MAD_OP,from,1); |
| 3024 | } |
| 3025 | } |
| 3026 | else { |
| 3027 | PerlIO_printf(PerlIO_stderr(), |
| 3028 | "DESTROYING op = %0"UVxf"\n", PTR2UV(from)); |
| 3029 | op_free(from); |
| 3030 | } |
| 3031 | } |
| 3032 | |
| 3033 | void |
| 3034 | Perl_prepend_madprops(pTHX_ MADPROP* mp, OP* o, char slot) |
| 3035 | { |
| 3036 | MADPROP* tm; |
| 3037 | if (!mp || !o) |
| 3038 | return; |
| 3039 | if (slot) |
| 3040 | mp->mad_key = slot; |
| 3041 | tm = o->op_madprop; |
| 3042 | o->op_madprop = mp; |
| 3043 | for (;;) { |
| 3044 | if (!mp->mad_next) |
| 3045 | break; |
| 3046 | mp = mp->mad_next; |
| 3047 | } |
| 3048 | mp->mad_next = tm; |
| 3049 | } |
| 3050 | |
| 3051 | void |
| 3052 | Perl_append_madprops(pTHX_ MADPROP* tm, OP* o, char slot) |
| 3053 | { |
| 3054 | if (!o) |
| 3055 | return; |
| 3056 | addmad(tm, &(o->op_madprop), slot); |
| 3057 | } |
| 3058 | |
| 3059 | void |
| 3060 | Perl_addmad(pTHX_ MADPROP* tm, MADPROP** root, char slot) |
| 3061 | { |
| 3062 | MADPROP* mp; |
| 3063 | if (!tm || !root) |
| 3064 | return; |
| 3065 | if (slot) |
| 3066 | tm->mad_key = slot; |
| 3067 | mp = *root; |
| 3068 | if (!mp) { |
| 3069 | *root = tm; |
| 3070 | return; |
| 3071 | } |
| 3072 | for (;;) { |
| 3073 | if (!mp->mad_next) |
| 3074 | break; |
| 3075 | mp = mp->mad_next; |
| 3076 | } |
| 3077 | mp->mad_next = tm; |
| 3078 | } |
| 3079 | |
| 3080 | MADPROP * |
| 3081 | Perl_newMADsv(pTHX_ char key, SV* sv) |
| 3082 | { |
| 3083 | PERL_ARGS_ASSERT_NEWMADSV; |
| 3084 | |
| 3085 | return newMADPROP(key, MAD_SV, sv, 0); |
| 3086 | } |
| 3087 | |
| 3088 | MADPROP * |
| 3089 | Perl_newMADPROP(pTHX_ char key, char type, void* val, I32 vlen) |
| 3090 | { |
| 3091 | MADPROP *mp; |
| 3092 | Newxz(mp, 1, MADPROP); |
| 3093 | mp->mad_next = 0; |
| 3094 | mp->mad_key = key; |
| 3095 | mp->mad_vlen = vlen; |
| 3096 | mp->mad_type = type; |
| 3097 | mp->mad_val = val; |
| 3098 | /* PerlIO_printf(PerlIO_stderr(), "NEW mp = %0x\n", mp); */ |
| 3099 | return mp; |
| 3100 | } |
| 3101 | |
| 3102 | void |
| 3103 | Perl_mad_free(pTHX_ MADPROP* mp) |
| 3104 | { |
| 3105 | /* PerlIO_printf(PerlIO_stderr(), "FREE mp = %0x\n", mp); */ |
| 3106 | if (!mp) |
| 3107 | return; |
| 3108 | if (mp->mad_next) |
| 3109 | mad_free(mp->mad_next); |
| 3110 | /* if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING && mp->mad_vlen) |
| 3111 | PerlIO_printf(PerlIO_stderr(), "DESTROYING '%c'=<%s>\n", mp->mad_key & 255, mp->mad_val); */ |
| 3112 | switch (mp->mad_type) { |
| 3113 | case MAD_NULL: |
| 3114 | break; |
| 3115 | case MAD_PV: |
| 3116 | Safefree((char*)mp->mad_val); |
| 3117 | break; |
| 3118 | case MAD_OP: |
| 3119 | if (mp->mad_vlen) /* vlen holds "strong/weak" boolean */ |
| 3120 | op_free((OP*)mp->mad_val); |
| 3121 | break; |
| 3122 | case MAD_SV: |
| 3123 | sv_free(MUTABLE_SV(mp->mad_val)); |
| 3124 | break; |
| 3125 | default: |
| 3126 | PerlIO_printf(PerlIO_stderr(), "Unrecognized mad\n"); |
| 3127 | break; |
| 3128 | } |
| 3129 | Safefree(mp); |
| 3130 | } |
| 3131 | |
| 3132 | #endif |
| 3133 | |
| 3134 | /* |
| 3135 | =head1 Optree construction |
| 3136 | |
| 3137 | =for apidoc Am|OP *|newNULLLIST |
| 3138 | |
| 3139 | Constructs, checks, and returns a new C<stub> op, which represents an |
| 3140 | empty list expression. |
| 3141 | |
| 3142 | =cut |
| 3143 | */ |
| 3144 | |
| 3145 | OP * |
| 3146 | Perl_newNULLLIST(pTHX) |
| 3147 | { |
| 3148 | return newOP(OP_STUB, 0); |
| 3149 | } |
| 3150 | |
| 3151 | static OP * |
| 3152 | S_force_list(pTHX_ OP *o) |
| 3153 | { |
| 3154 | if (!o || o->op_type != OP_LIST) |
| 3155 | o = newLISTOP(OP_LIST, 0, o, NULL); |
| 3156 | op_null(o); |
| 3157 | return o; |
| 3158 | } |
| 3159 | |
| 3160 | /* |
| 3161 | =for apidoc Am|OP *|newLISTOP|I32 type|I32 flags|OP *first|OP *last |
| 3162 | |
| 3163 | Constructs, checks, and returns an op of any list type. I<type> is |
| 3164 | the opcode. I<flags> gives the eight bits of C<op_flags>, except that |
| 3165 | C<OPf_KIDS> will be set automatically if required. I<first> and I<last> |
| 3166 | supply up to two ops to be direct children of the list op; they are |
| 3167 | consumed by this function and become part of the constructed op tree. |
| 3168 | |
| 3169 | =cut |
| 3170 | */ |
| 3171 | |
| 3172 | OP * |
| 3173 | Perl_newLISTOP(pTHX_ I32 type, I32 flags, OP *first, OP *last) |
| 3174 | { |
| 3175 | dVAR; |
| 3176 | LISTOP *listop; |
| 3177 | |
| 3178 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_LISTOP); |
| 3179 | |
| 3180 | NewOp(1101, listop, 1, LISTOP); |
| 3181 | |
| 3182 | listop->op_type = (OPCODE)type; |
| 3183 | listop->op_ppaddr = PL_ppaddr[type]; |
| 3184 | if (first || last) |
| 3185 | flags |= OPf_KIDS; |
| 3186 | listop->op_flags = (U8)flags; |
| 3187 | |
| 3188 | if (!last && first) |
| 3189 | last = first; |
| 3190 | else if (!first && last) |
| 3191 | first = last; |
| 3192 | else if (first) |
| 3193 | first->op_sibling = last; |
| 3194 | listop->op_first = first; |
| 3195 | listop->op_last = last; |
| 3196 | if (type == OP_LIST) { |
| 3197 | OP* const pushop = newOP(OP_PUSHMARK, 0); |
| 3198 | pushop->op_sibling = first; |
| 3199 | listop->op_first = pushop; |
| 3200 | listop->op_flags |= OPf_KIDS; |
| 3201 | if (!last) |
| 3202 | listop->op_last = pushop; |
| 3203 | } |
| 3204 | |
| 3205 | return CHECKOP(type, listop); |
| 3206 | } |
| 3207 | |
| 3208 | /* |
| 3209 | =for apidoc Am|OP *|newOP|I32 type|I32 flags |
| 3210 | |
| 3211 | Constructs, checks, and returns an op of any base type (any type that |
| 3212 | has no extra fields). I<type> is the opcode. I<flags> gives the |
| 3213 | eight bits of C<op_flags>, and, shifted up eight bits, the eight bits |
| 3214 | of C<op_private>. |
| 3215 | |
| 3216 | =cut |
| 3217 | */ |
| 3218 | |
| 3219 | OP * |
| 3220 | Perl_newOP(pTHX_ I32 type, I32 flags) |
| 3221 | { |
| 3222 | dVAR; |
| 3223 | OP *o; |
| 3224 | |
| 3225 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_BASEOP |
| 3226 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_BASEOP_OR_UNOP |
| 3227 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_FILESTATOP |
| 3228 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP); |
| 3229 | |
| 3230 | NewOp(1101, o, 1, OP); |
| 3231 | o->op_type = (OPCODE)type; |
| 3232 | o->op_ppaddr = PL_ppaddr[type]; |
| 3233 | o->op_flags = (U8)flags; |
| 3234 | o->op_latefree = 0; |
| 3235 | o->op_latefreed = 0; |
| 3236 | o->op_attached = 0; |
| 3237 | |
| 3238 | o->op_next = o; |
| 3239 | o->op_private = (U8)(0 | (flags >> 8)); |
| 3240 | if (PL_opargs[type] & OA_RETSCALAR) |
| 3241 | scalar(o); |
| 3242 | if (PL_opargs[type] & OA_TARGET) |
| 3243 | o->op_targ = pad_alloc(type, SVs_PADTMP); |
| 3244 | return CHECKOP(type, o); |
| 3245 | } |
| 3246 | |
| 3247 | /* |
| 3248 | =for apidoc Am|OP *|newUNOP|I32 type|I32 flags|OP *first |
| 3249 | |
| 3250 | Constructs, checks, and returns an op of any unary type. I<type> is |
| 3251 | the opcode. I<flags> gives the eight bits of C<op_flags>, except that |
| 3252 | C<OPf_KIDS> will be set automatically if required, and, shifted up eight |
| 3253 | bits, the eight bits of C<op_private>, except that the bit with value 1 |
| 3254 | is automatically set. I<first> supplies an optional op to be the direct |
| 3255 | child of the unary op; it is consumed by this function and become part |
| 3256 | of the constructed op tree. |
| 3257 | |
| 3258 | =cut |
| 3259 | */ |
| 3260 | |
| 3261 | OP * |
| 3262 | Perl_newUNOP(pTHX_ I32 type, I32 flags, OP *first) |
| 3263 | { |
| 3264 | dVAR; |
| 3265 | UNOP *unop; |
| 3266 | |
| 3267 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_UNOP |
| 3268 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_BASEOP_OR_UNOP |
| 3269 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_FILESTATOP |
| 3270 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP |
| 3271 | || type == OP_SASSIGN |
| 3272 | || type == OP_ENTERTRY |
| 3273 | || type == OP_NULL ); |
| 3274 | |
| 3275 | if (!first) |
| 3276 | first = newOP(OP_STUB, 0); |
| 3277 | if (PL_opargs[type] & OA_MARK) |
| 3278 | first = force_list(first); |
| 3279 | |
| 3280 | NewOp(1101, unop, 1, UNOP); |
| 3281 | unop->op_type = (OPCODE)type; |
| 3282 | unop->op_ppaddr = PL_ppaddr[type]; |
| 3283 | unop->op_first = first; |
| 3284 | unop->op_flags = (U8)(flags | OPf_KIDS); |
| 3285 | unop->op_private = (U8)(1 | (flags >> 8)); |
| 3286 | unop = (UNOP*) CHECKOP(type, unop); |
| 3287 | if (unop->op_next) |
| 3288 | return (OP*)unop; |
| 3289 | |
| 3290 | return fold_constants((OP *) unop); |
| 3291 | } |
| 3292 | |
| 3293 | /* |
| 3294 | =for apidoc Am|OP *|newBINOP|I32 type|I32 flags|OP *first|OP *last |
| 3295 | |
| 3296 | Constructs, checks, and returns an op of any binary type. I<type> |
| 3297 | is the opcode. I<flags> gives the eight bits of C<op_flags>, except |
| 3298 | that C<OPf_KIDS> will be set automatically, and, shifted up eight bits, |
| 3299 | the eight bits of C<op_private>, except that the bit with value 1 or |
| 3300 | 2 is automatically set as required. I<first> and I<last> supply up to |
| 3301 | two ops to be the direct children of the binary op; they are consumed |
| 3302 | by this function and become part of the constructed op tree. |
| 3303 | |
| 3304 | =cut |
| 3305 | */ |
| 3306 | |
| 3307 | OP * |
| 3308 | Perl_newBINOP(pTHX_ I32 type, I32 flags, OP *first, OP *last) |
| 3309 | { |
| 3310 | dVAR; |
| 3311 | BINOP *binop; |
| 3312 | |
| 3313 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_BINOP |
| 3314 | || type == OP_SASSIGN || type == OP_NULL ); |
| 3315 | |
| 3316 | NewOp(1101, binop, 1, BINOP); |
| 3317 | |
| 3318 | if (!first) |
| 3319 | first = newOP(OP_NULL, 0); |
| 3320 | |
| 3321 | binop->op_type = (OPCODE)type; |
| 3322 | binop->op_ppaddr = PL_ppaddr[type]; |
| 3323 | binop->op_first = first; |
| 3324 | binop->op_flags = (U8)(flags | OPf_KIDS); |
| 3325 | if (!last) { |
| 3326 | last = first; |
| 3327 | binop->op_private = (U8)(1 | (flags >> 8)); |
| 3328 | } |
| 3329 | else { |
| 3330 | binop->op_private = (U8)(2 | (flags >> 8)); |
| 3331 | first->op_sibling = last; |
| 3332 | } |
| 3333 | |
| 3334 | binop = (BINOP*)CHECKOP(type, binop); |
| 3335 | if (binop->op_next || binop->op_type != (OPCODE)type) |
| 3336 | return (OP*)binop; |
| 3337 | |
| 3338 | binop->op_last = binop->op_first->op_sibling; |
| 3339 | |
| 3340 | return fold_constants((OP *)binop); |
| 3341 | } |
| 3342 | |
| 3343 | static int uvcompare(const void *a, const void *b) |
| 3344 | __attribute__nonnull__(1) |
| 3345 | __attribute__nonnull__(2) |
| 3346 | __attribute__pure__; |
| 3347 | static int uvcompare(const void *a, const void *b) |
| 3348 | { |
| 3349 | if (*((const UV *)a) < (*(const UV *)b)) |
| 3350 | return -1; |
| 3351 | if (*((const UV *)a) > (*(const UV *)b)) |
| 3352 | return 1; |
| 3353 | if (*((const UV *)a+1) < (*(const UV *)b+1)) |
| 3354 | return -1; |
| 3355 | if (*((const UV *)a+1) > (*(const UV *)b+1)) |
| 3356 | return 1; |
| 3357 | return 0; |
| 3358 | } |
| 3359 | |
| 3360 | static OP * |
| 3361 | S_pmtrans(pTHX_ OP *o, OP *expr, OP *repl) |
| 3362 | { |
| 3363 | dVAR; |
| 3364 | SV * const tstr = ((SVOP*)expr)->op_sv; |
| 3365 | SV * const rstr = |
| 3366 | #ifdef PERL_MAD |
| 3367 | (repl->op_type == OP_NULL) |
| 3368 | ? ((SVOP*)((LISTOP*)repl)->op_first)->op_sv : |
| 3369 | #endif |
| 3370 | ((SVOP*)repl)->op_sv; |
| 3371 | STRLEN tlen; |
| 3372 | STRLEN rlen; |
| 3373 | const U8 *t = (U8*)SvPV_const(tstr, tlen); |
| 3374 | const U8 *r = (U8*)SvPV_const(rstr, rlen); |
| 3375 | register I32 i; |
| 3376 | register I32 j; |
| 3377 | I32 grows = 0; |
| 3378 | register short *tbl; |
| 3379 | |
| 3380 | const I32 complement = o->op_private & OPpTRANS_COMPLEMENT; |
| 3381 | const I32 squash = o->op_private & OPpTRANS_SQUASH; |
| 3382 | I32 del = o->op_private & OPpTRANS_DELETE; |
| 3383 | SV* swash; |
| 3384 | |
| 3385 | PERL_ARGS_ASSERT_PMTRANS; |
| 3386 | |
| 3387 | PL_hints |= HINT_BLOCK_SCOPE; |
| 3388 | |
| 3389 | if (SvUTF8(tstr)) |
| 3390 | o->op_private |= OPpTRANS_FROM_UTF; |
| 3391 | |
| 3392 | if (SvUTF8(rstr)) |
| 3393 | o->op_private |= OPpTRANS_TO_UTF; |
| 3394 | |
| 3395 | if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) { |
| 3396 | SV* const listsv = newSVpvs("# comment\n"); |
| 3397 | SV* transv = NULL; |
| 3398 | const U8* tend = t + tlen; |
| 3399 | const U8* rend = r + rlen; |
| 3400 | STRLEN ulen; |
| 3401 | UV tfirst = 1; |
| 3402 | UV tlast = 0; |
| 3403 | IV tdiff; |
| 3404 | UV rfirst = 1; |
| 3405 | UV rlast = 0; |
| 3406 | IV rdiff; |
| 3407 | IV diff; |
| 3408 | I32 none = 0; |
| 3409 | U32 max = 0; |
| 3410 | I32 bits; |
| 3411 | I32 havefinal = 0; |
| 3412 | U32 final = 0; |
| 3413 | const I32 from_utf = o->op_private & OPpTRANS_FROM_UTF; |
| 3414 | const I32 to_utf = o->op_private & OPpTRANS_TO_UTF; |
| 3415 | U8* tsave = NULL; |
| 3416 | U8* rsave = NULL; |
| 3417 | const U32 flags = UTF8_ALLOW_DEFAULT; |
| 3418 | |
| 3419 | if (!from_utf) { |
| 3420 | STRLEN len = tlen; |
| 3421 | t = tsave = bytes_to_utf8(t, &len); |
| 3422 | tend = t + len; |
| 3423 | } |
| 3424 | if (!to_utf && rlen) { |
| 3425 | STRLEN len = rlen; |
| 3426 | r = rsave = bytes_to_utf8(r, &len); |
| 3427 | rend = r + len; |
| 3428 | } |
| 3429 | |
| 3430 | /* There are several snags with this code on EBCDIC: |
| 3431 | 1. 0xFF is a legal UTF-EBCDIC byte (there are no illegal bytes). |
| 3432 | 2. scan_const() in toke.c has encoded chars in native encoding which makes |
| 3433 | ranges at least in EBCDIC 0..255 range the bottom odd. |
| 3434 | */ |
| 3435 | |
| 3436 | if (complement) { |
| 3437 | U8 tmpbuf[UTF8_MAXBYTES+1]; |
| 3438 | UV *cp; |
| 3439 | UV nextmin = 0; |
| 3440 | Newx(cp, 2*tlen, UV); |
| 3441 | i = 0; |
| 3442 | transv = newSVpvs(""); |
| 3443 | while (t < tend) { |
| 3444 | cp[2*i] = utf8n_to_uvuni(t, tend-t, &ulen, flags); |
| 3445 | t += ulen; |
| 3446 | if (t < tend && NATIVE_TO_UTF(*t) == 0xff) { |
| 3447 | t++; |
| 3448 | cp[2*i+1] = utf8n_to_uvuni(t, tend-t, &ulen, flags); |
| 3449 | t += ulen; |
| 3450 | } |
| 3451 | else { |
| 3452 | cp[2*i+1] = cp[2*i]; |
| 3453 | } |
| 3454 | i++; |
| 3455 | } |
| 3456 | qsort(cp, i, 2*sizeof(UV), uvcompare); |
| 3457 | for (j = 0; j < i; j++) { |
| 3458 | UV val = cp[2*j]; |
| 3459 | diff = val - nextmin; |
| 3460 | if (diff > 0) { |
| 3461 | t = uvuni_to_utf8(tmpbuf,nextmin); |
| 3462 | sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf); |
| 3463 | if (diff > 1) { |
| 3464 | U8 range_mark = UTF_TO_NATIVE(0xff); |
| 3465 | t = uvuni_to_utf8(tmpbuf, val - 1); |
| 3466 | sv_catpvn(transv, (char *)&range_mark, 1); |
| 3467 | sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf); |
| 3468 | } |
| 3469 | } |
| 3470 | val = cp[2*j+1]; |
| 3471 | if (val >= nextmin) |
| 3472 | nextmin = val + 1; |
| 3473 | } |
| 3474 | t = uvuni_to_utf8(tmpbuf,nextmin); |
| 3475 | sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf); |
| 3476 | { |
| 3477 | U8 range_mark = UTF_TO_NATIVE(0xff); |
| 3478 | sv_catpvn(transv, (char *)&range_mark, 1); |
| 3479 | } |
| 3480 | t = uvuni_to_utf8_flags(tmpbuf, 0x7fffffff, |
| 3481 | UNICODE_ALLOW_SUPER); |
| 3482 | sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf); |
| 3483 | t = (const U8*)SvPVX_const(transv); |
| 3484 | tlen = SvCUR(transv); |
| 3485 | tend = t + tlen; |
| 3486 | Safefree(cp); |
| 3487 | } |
| 3488 | else if (!rlen && !del) { |
| 3489 | r = t; rlen = tlen; rend = tend; |
| 3490 | } |
| 3491 | if (!squash) { |
| 3492 | if ((!rlen && !del) || t == r || |
| 3493 | (tlen == rlen && memEQ((char *)t, (char *)r, tlen))) |
| 3494 | { |
| 3495 | o->op_private |= OPpTRANS_IDENTICAL; |
| 3496 | } |
| 3497 | } |
| 3498 | |
| 3499 | while (t < tend || tfirst <= tlast) { |
| 3500 | /* see if we need more "t" chars */ |
| 3501 | if (tfirst > tlast) { |
| 3502 | tfirst = (I32)utf8n_to_uvuni(t, tend - t, &ulen, flags); |
| 3503 | t += ulen; |
| 3504 | if (t < tend && NATIVE_TO_UTF(*t) == 0xff) { /* illegal utf8 val indicates range */ |
| 3505 | t++; |
| 3506 | tlast = (I32)utf8n_to_uvuni(t, tend - t, &ulen, flags); |
| 3507 | t += ulen; |
| 3508 | } |
| 3509 | else |
| 3510 | tlast = tfirst; |
| 3511 | } |
| 3512 | |
| 3513 | /* now see if we need more "r" chars */ |
| 3514 | if (rfirst > rlast) { |
| 3515 | if (r < rend) { |
| 3516 | rfirst = (I32)utf8n_to_uvuni(r, rend - r, &ulen, flags); |
| 3517 | r += ulen; |
| 3518 | if (r < rend && NATIVE_TO_UTF(*r) == 0xff) { /* illegal utf8 val indicates range */ |
| 3519 | r++; |
| 3520 | rlast = (I32)utf8n_to_uvuni(r, rend - r, &ulen, flags); |
| 3521 | r += ulen; |
| 3522 | } |
| 3523 | else |
| 3524 | rlast = rfirst; |
| 3525 | } |
| 3526 | else { |
| 3527 | if (!havefinal++) |
| 3528 | final = rlast; |
| 3529 | rfirst = rlast = 0xffffffff; |
| 3530 | } |
| 3531 | } |
| 3532 | |
| 3533 | /* now see which range will peter our first, if either. */ |
| 3534 | tdiff = tlast - tfirst; |
| 3535 | rdiff = rlast - rfirst; |
| 3536 | |
| 3537 | if (tdiff <= rdiff) |
| 3538 | diff = tdiff; |
| 3539 | else |
| 3540 | diff = rdiff; |
| 3541 | |
| 3542 | if (rfirst == 0xffffffff) { |
| 3543 | diff = tdiff; /* oops, pretend rdiff is infinite */ |
| 3544 | if (diff > 0) |
| 3545 | Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\tXXXX\n", |
| 3546 | (long)tfirst, (long)tlast); |
| 3547 | else |
| 3548 | Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\tXXXX\n", (long)tfirst); |
| 3549 | } |
| 3550 | else { |
| 3551 | if (diff > 0) |
| 3552 | Perl_sv_catpvf(aTHX_ listsv, "%04lx\t%04lx\t%04lx\n", |
| 3553 | (long)tfirst, (long)(tfirst + diff), |
| 3554 | (long)rfirst); |
| 3555 | else |
| 3556 | Perl_sv_catpvf(aTHX_ listsv, "%04lx\t\t%04lx\n", |
| 3557 | (long)tfirst, (long)rfirst); |
| 3558 | |
| 3559 | if (rfirst + diff > max) |
| 3560 | max = rfirst + diff; |
| 3561 | if (!grows) |
| 3562 | grows = (tfirst < rfirst && |
| 3563 | UNISKIP(tfirst) < UNISKIP(rfirst + diff)); |
| 3564 | rfirst += diff + 1; |
| 3565 | } |
| 3566 | tfirst += diff + 1; |
| 3567 | } |
| 3568 | |
| 3569 | none = ++max; |
| 3570 | if (del) |
| 3571 | del = ++max; |
| 3572 | |
| 3573 | if (max > 0xffff) |
| 3574 | bits = 32; |
| 3575 | else if (max > 0xff) |
| 3576 | bits = 16; |
| 3577 | else |
| 3578 | bits = 8; |
| 3579 | |
| 3580 | PerlMemShared_free(cPVOPo->op_pv); |
| 3581 | cPVOPo->op_pv = NULL; |
| 3582 | |
| 3583 | swash = MUTABLE_SV(swash_init("utf8", "", listsv, bits, none)); |
| 3584 | #ifdef USE_ITHREADS |
| 3585 | cPADOPo->op_padix = pad_alloc(OP_TRANS, SVs_PADTMP); |
| 3586 | SvREFCNT_dec(PAD_SVl(cPADOPo->op_padix)); |
| 3587 | PAD_SETSV(cPADOPo->op_padix, swash); |
| 3588 | SvPADTMP_on(swash); |
| 3589 | SvREADONLY_on(swash); |
| 3590 | #else |
| 3591 | cSVOPo->op_sv = swash; |
| 3592 | #endif |
| 3593 | SvREFCNT_dec(listsv); |
| 3594 | SvREFCNT_dec(transv); |
| 3595 | |
| 3596 | if (!del && havefinal && rlen) |
| 3597 | (void)hv_store(MUTABLE_HV(SvRV(swash)), "FINAL", 5, |
| 3598 | newSVuv((UV)final), 0); |
| 3599 | |
| 3600 | if (grows) |
| 3601 | o->op_private |= OPpTRANS_GROWS; |
| 3602 | |
| 3603 | Safefree(tsave); |
| 3604 | Safefree(rsave); |
| 3605 | |
| 3606 | #ifdef PERL_MAD |
| 3607 | op_getmad(expr,o,'e'); |
| 3608 | op_getmad(repl,o,'r'); |
| 3609 | #else |
| 3610 | op_free(expr); |
| 3611 | op_free(repl); |
| 3612 | #endif |
| 3613 | return o; |
| 3614 | } |
| 3615 | |
| 3616 | tbl = (short*)cPVOPo->op_pv; |
| 3617 | if (complement) { |
| 3618 | Zero(tbl, 256, short); |
| 3619 | for (i = 0; i < (I32)tlen; i++) |
| 3620 | tbl[t[i]] = -1; |
| 3621 | for (i = 0, j = 0; i < 256; i++) { |
| 3622 | if (!tbl[i]) { |
| 3623 | if (j >= (I32)rlen) { |
| 3624 | if (del) |
| 3625 | tbl[i] = -2; |
| 3626 | else if (rlen) |
| 3627 | tbl[i] = r[j-1]; |
| 3628 | else |
| 3629 | tbl[i] = (short)i; |
| 3630 | } |
| 3631 | else { |
| 3632 | if (i < 128 && r[j] >= 128) |
| 3633 | grows = 1; |
| 3634 | tbl[i] = r[j++]; |
| 3635 | } |
| 3636 | } |
| 3637 | } |
| 3638 | if (!del) { |
| 3639 | if (!rlen) { |
| 3640 | j = rlen; |
| 3641 | if (!squash) |
| 3642 | o->op_private |= OPpTRANS_IDENTICAL; |
| 3643 | } |
| 3644 | else if (j >= (I32)rlen) |
| 3645 | j = rlen - 1; |
| 3646 | else { |
| 3647 | tbl = |
| 3648 | (short *) |
| 3649 | PerlMemShared_realloc(tbl, |
| 3650 | (0x101+rlen-j) * sizeof(short)); |
| 3651 | cPVOPo->op_pv = (char*)tbl; |
| 3652 | } |
| 3653 | tbl[0x100] = (short)(rlen - j); |
| 3654 | for (i=0; i < (I32)rlen - j; i++) |
| 3655 | tbl[0x101+i] = r[j+i]; |
| 3656 | } |
| 3657 | } |
| 3658 | else { |
| 3659 | if (!rlen && !del) { |
| 3660 | r = t; rlen = tlen; |
| 3661 | if (!squash) |
| 3662 | o->op_private |= OPpTRANS_IDENTICAL; |
| 3663 | } |
| 3664 | else if (!squash && rlen == tlen && memEQ((char*)t, (char*)r, tlen)) { |
| 3665 | o->op_private |= OPpTRANS_IDENTICAL; |
| 3666 | } |
| 3667 | for (i = 0; i < 256; i++) |
| 3668 | tbl[i] = -1; |
| 3669 | for (i = 0, j = 0; i < (I32)tlen; i++,j++) { |
| 3670 | if (j >= (I32)rlen) { |
| 3671 | if (del) { |
| 3672 | if (tbl[t[i]] == -1) |
| 3673 | tbl[t[i]] = -2; |
| 3674 | continue; |
| 3675 | } |
| 3676 | --j; |
| 3677 | } |
| 3678 | if (tbl[t[i]] == -1) { |
| 3679 | if (t[i] < 128 && r[j] >= 128) |
| 3680 | grows = 1; |
| 3681 | tbl[t[i]] = r[j]; |
| 3682 | } |
| 3683 | } |
| 3684 | } |
| 3685 | |
| 3686 | if(del && rlen == tlen) { |
| 3687 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "Useless use of /d modifier in transliteration operator"); |
| 3688 | } else if(rlen > tlen) { |
| 3689 | Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "Replacement list is longer than search list"); |
| 3690 | } |
| 3691 | |
| 3692 | if (grows) |
| 3693 | o->op_private |= OPpTRANS_GROWS; |
| 3694 | #ifdef PERL_MAD |
| 3695 | op_getmad(expr,o,'e'); |
| 3696 | op_getmad(repl,o,'r'); |
| 3697 | #else |
| 3698 | op_free(expr); |
| 3699 | op_free(repl); |
| 3700 | #endif |
| 3701 | |
| 3702 | return o; |
| 3703 | } |
| 3704 | |
| 3705 | /* |
| 3706 | =for apidoc Am|OP *|newPMOP|I32 type|I32 flags |
| 3707 | |
| 3708 | Constructs, checks, and returns an op of any pattern matching type. |
| 3709 | I<type> is the opcode. I<flags> gives the eight bits of C<op_flags> |
| 3710 | and, shifted up eight bits, the eight bits of C<op_private>. |
| 3711 | |
| 3712 | =cut |
| 3713 | */ |
| 3714 | |
| 3715 | OP * |
| 3716 | Perl_newPMOP(pTHX_ I32 type, I32 flags) |
| 3717 | { |
| 3718 | dVAR; |
| 3719 | PMOP *pmop; |
| 3720 | |
| 3721 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_PMOP); |
| 3722 | |
| 3723 | NewOp(1101, pmop, 1, PMOP); |
| 3724 | pmop->op_type = (OPCODE)type; |
| 3725 | pmop->op_ppaddr = PL_ppaddr[type]; |
| 3726 | pmop->op_flags = (U8)flags; |
| 3727 | pmop->op_private = (U8)(0 | (flags >> 8)); |
| 3728 | |
| 3729 | if (PL_hints & HINT_RE_TAINT) |
| 3730 | pmop->op_pmflags |= PMf_RETAINT; |
| 3731 | if (PL_hints & HINT_LOCALE) { |
| 3732 | pmop->op_pmflags |= PMf_LOCALE; |
| 3733 | } |
| 3734 | else if ((! (PL_hints & HINT_BYTES)) && (PL_hints & HINT_UNI_8_BIT)) { |
| 3735 | pmop->op_pmflags |= RXf_PMf_UNICODE; |
| 3736 | } |
| 3737 | |
| 3738 | |
| 3739 | #ifdef USE_ITHREADS |
| 3740 | assert(SvPOK(PL_regex_pad[0])); |
| 3741 | if (SvCUR(PL_regex_pad[0])) { |
| 3742 | /* Pop off the "packed" IV from the end. */ |
| 3743 | SV *const repointer_list = PL_regex_pad[0]; |
| 3744 | const char *p = SvEND(repointer_list) - sizeof(IV); |
| 3745 | const IV offset = *((IV*)p); |
| 3746 | |
| 3747 | assert(SvCUR(repointer_list) % sizeof(IV) == 0); |
| 3748 | |
| 3749 | SvEND_set(repointer_list, p); |
| 3750 | |
| 3751 | pmop->op_pmoffset = offset; |
| 3752 | /* This slot should be free, so assert this: */ |
| 3753 | assert(PL_regex_pad[offset] == &PL_sv_undef); |
| 3754 | } else { |
| 3755 | SV * const repointer = &PL_sv_undef; |
| 3756 | av_push(PL_regex_padav, repointer); |
| 3757 | pmop->op_pmoffset = av_len(PL_regex_padav); |
| 3758 | PL_regex_pad = AvARRAY(PL_regex_padav); |
| 3759 | } |
| 3760 | #endif |
| 3761 | |
| 3762 | return CHECKOP(type, pmop); |
| 3763 | } |
| 3764 | |
| 3765 | /* Given some sort of match op o, and an expression expr containing a |
| 3766 | * pattern, either compile expr into a regex and attach it to o (if it's |
| 3767 | * constant), or convert expr into a runtime regcomp op sequence (if it's |
| 3768 | * not) |
| 3769 | * |
| 3770 | * isreg indicates that the pattern is part of a regex construct, eg |
| 3771 | * $x =~ /pattern/ or split /pattern/, as opposed to $x =~ $pattern or |
| 3772 | * split "pattern", which aren't. In the former case, expr will be a list |
| 3773 | * if the pattern contains more than one term (eg /a$b/) or if it contains |
| 3774 | * a replacement, ie s/// or tr///. |
| 3775 | */ |
| 3776 | |
| 3777 | OP * |
| 3778 | Perl_pmruntime(pTHX_ OP *o, OP *expr, bool isreg) |
| 3779 | { |
| 3780 | dVAR; |
| 3781 | PMOP *pm; |
| 3782 | LOGOP *rcop; |
| 3783 | I32 repl_has_vars = 0; |
| 3784 | OP* repl = NULL; |
| 3785 | bool reglist; |
| 3786 | |
| 3787 | PERL_ARGS_ASSERT_PMRUNTIME; |
| 3788 | |
| 3789 | if (o->op_type == OP_SUBST || o->op_type == OP_TRANS) { |
| 3790 | /* last element in list is the replacement; pop it */ |
| 3791 | OP* kid; |
| 3792 | repl = cLISTOPx(expr)->op_last; |
| 3793 | kid = cLISTOPx(expr)->op_first; |
| 3794 | while (kid->op_sibling != repl) |
| 3795 | kid = kid->op_sibling; |
| 3796 | kid->op_sibling = NULL; |
| 3797 | cLISTOPx(expr)->op_last = kid; |
| 3798 | } |
| 3799 | |
| 3800 | if (isreg && expr->op_type == OP_LIST && |
| 3801 | cLISTOPx(expr)->op_first->op_sibling == cLISTOPx(expr)->op_last) |
| 3802 | { |
| 3803 | /* convert single element list to element */ |
| 3804 | OP* const oe = expr; |
| 3805 | expr = cLISTOPx(oe)->op_first->op_sibling; |
| 3806 | cLISTOPx(oe)->op_first->op_sibling = NULL; |
| 3807 | cLISTOPx(oe)->op_last = NULL; |
| 3808 | op_free(oe); |
| 3809 | } |
| 3810 | |
| 3811 | if (o->op_type == OP_TRANS) { |
| 3812 | return pmtrans(o, expr, repl); |
| 3813 | } |
| 3814 | |
| 3815 | reglist = isreg && expr->op_type == OP_LIST; |
| 3816 | if (reglist) |
| 3817 | op_null(expr); |
| 3818 | |
| 3819 | PL_hints |= HINT_BLOCK_SCOPE; |
| 3820 | pm = (PMOP*)o; |
| 3821 | |
| 3822 | if (expr->op_type == OP_CONST) { |
| 3823 | SV *pat = ((SVOP*)expr)->op_sv; |
| 3824 | U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME; |
| 3825 | |
| 3826 | if (o->op_flags & OPf_SPECIAL) |
| 3827 | pm_flags |= RXf_SPLIT; |
| 3828 | |
| 3829 | if (DO_UTF8(pat)) { |
| 3830 | assert (SvUTF8(pat)); |
| 3831 | } else if (SvUTF8(pat)) { |
| 3832 | /* Not doing UTF-8, despite what the SV says. Is this only if we're |
| 3833 | trapped in use 'bytes'? */ |
| 3834 | /* Make a copy of the octet sequence, but without the flag on, as |
| 3835 | the compiler now honours the SvUTF8 flag on pat. */ |
| 3836 | STRLEN len; |
| 3837 | const char *const p = SvPV(pat, len); |
| 3838 | pat = newSVpvn_flags(p, len, SVs_TEMP); |
| 3839 | } |
| 3840 | |
| 3841 | PM_SETRE(pm, CALLREGCOMP(pat, pm_flags)); |
| 3842 | |
| 3843 | #ifdef PERL_MAD |
| 3844 | op_getmad(expr,(OP*)pm,'e'); |
| 3845 | #else |
| 3846 | op_free(expr); |
| 3847 | #endif |
| 3848 | } |
| 3849 | else { |
| 3850 | if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) |
| 3851 | expr = newUNOP((!(PL_hints & HINT_RE_EVAL) |
| 3852 | ? OP_REGCRESET |
| 3853 | : OP_REGCMAYBE),0,expr); |
| 3854 | |
| 3855 | NewOp(1101, rcop, 1, LOGOP); |
| 3856 | rcop->op_type = OP_REGCOMP; |
| 3857 | rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP]; |
| 3858 | rcop->op_first = scalar(expr); |
| 3859 | rcop->op_flags |= OPf_KIDS |
| 3860 | | ((PL_hints & HINT_RE_EVAL) ? OPf_SPECIAL : 0) |
| 3861 | | (reglist ? OPf_STACKED : 0); |
| 3862 | rcop->op_private = 1; |
| 3863 | rcop->op_other = o; |
| 3864 | if (reglist) |
| 3865 | rcop->op_targ = pad_alloc(rcop->op_type, SVs_PADTMP); |
| 3866 | |
| 3867 | /* /$x/ may cause an eval, since $x might be qr/(?{..})/ */ |
| 3868 | PL_cv_has_eval = 1; |
| 3869 | |
| 3870 | /* establish postfix order */ |
| 3871 | if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) { |
| 3872 | LINKLIST(expr); |
| 3873 | rcop->op_next = expr; |
| 3874 | ((UNOP*)expr)->op_first->op_next = (OP*)rcop; |
| 3875 | } |
| 3876 | else { |
| 3877 | rcop->op_next = LINKLIST(expr); |
| 3878 | expr->op_next = (OP*)rcop; |
| 3879 | } |
| 3880 | |
| 3881 | op_prepend_elem(o->op_type, scalar((OP*)rcop), o); |
| 3882 | } |
| 3883 | |
| 3884 | if (repl) { |
| 3885 | OP *curop; |
| 3886 | if (pm->op_pmflags & PMf_EVAL) { |
| 3887 | curop = NULL; |
| 3888 | if (CopLINE(PL_curcop) < (line_t)PL_parser->multi_end) |
| 3889 | CopLINE_set(PL_curcop, (line_t)PL_parser->multi_end); |
| 3890 | } |
| 3891 | else if (repl->op_type == OP_CONST) |
| 3892 | curop = repl; |
| 3893 | else { |
| 3894 | OP *lastop = NULL; |
| 3895 | for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) { |
| 3896 | if (curop->op_type == OP_SCOPE |
| 3897 | || curop->op_type == OP_LEAVE |
| 3898 | || (PL_opargs[curop->op_type] & OA_DANGEROUS)) { |
| 3899 | if (curop->op_type == OP_GV) { |
| 3900 | GV * const gv = cGVOPx_gv(curop); |
| 3901 | repl_has_vars = 1; |
| 3902 | if (strchr("&`'123456789+-\016\022", *GvENAME(gv))) |
| 3903 | break; |
| 3904 | } |
| 3905 | else if (curop->op_type == OP_RV2CV) |
| 3906 | break; |
| 3907 | else if (curop->op_type == OP_RV2SV || |
| 3908 | curop->op_type == OP_RV2AV || |
| 3909 | curop->op_type == OP_RV2HV || |
| 3910 | curop->op_type == OP_RV2GV) { |
| 3911 | if (lastop && lastop->op_type != OP_GV) /*funny deref?*/ |
| 3912 | break; |
| 3913 | } |
| 3914 | else if (curop->op_type == OP_PADSV || |
| 3915 | curop->op_type == OP_PADAV || |
| 3916 | curop->op_type == OP_PADHV || |
| 3917 | curop->op_type == OP_PADANY) |
| 3918 | { |
| 3919 | repl_has_vars = 1; |
| 3920 | } |
| 3921 | else if (curop->op_type == OP_PUSHRE) |
| 3922 | NOOP; /* Okay here, dangerous in newASSIGNOP */ |
| 3923 | else |
| 3924 | break; |
| 3925 | } |
| 3926 | lastop = curop; |
| 3927 | } |
| 3928 | } |
| 3929 | if (curop == repl |
| 3930 | && !(repl_has_vars |
| 3931 | && (!PM_GETRE(pm) |
| 3932 | || RX_EXTFLAGS(PM_GETRE(pm)) & RXf_EVAL_SEEN))) |
| 3933 | { |
| 3934 | pm->op_pmflags |= PMf_CONST; /* const for long enough */ |
| 3935 | op_prepend_elem(o->op_type, scalar(repl), o); |
| 3936 | } |
| 3937 | else { |
| 3938 | if (curop == repl && !PM_GETRE(pm)) { /* Has variables. */ |
| 3939 | pm->op_pmflags |= PMf_MAYBE_CONST; |
| 3940 | } |
| 3941 | NewOp(1101, rcop, 1, LOGOP); |
| 3942 | rcop->op_type = OP_SUBSTCONT; |
| 3943 | rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT]; |
| 3944 | rcop->op_first = scalar(repl); |
| 3945 | rcop->op_flags |= OPf_KIDS; |
| 3946 | rcop->op_private = 1; |
| 3947 | rcop->op_other = o; |
| 3948 | |
| 3949 | /* establish postfix order */ |
| 3950 | rcop->op_next = LINKLIST(repl); |
| 3951 | repl->op_next = (OP*)rcop; |
| 3952 | |
| 3953 | pm->op_pmreplrootu.op_pmreplroot = scalar((OP*)rcop); |
| 3954 | assert(!(pm->op_pmflags & PMf_ONCE)); |
| 3955 | pm->op_pmstashstartu.op_pmreplstart = LINKLIST(rcop); |
| 3956 | rcop->op_next = 0; |
| 3957 | } |
| 3958 | } |
| 3959 | |
| 3960 | return (OP*)pm; |
| 3961 | } |
| 3962 | |
| 3963 | /* |
| 3964 | =for apidoc Am|OP *|newSVOP|I32 type|I32 flags|SV *sv |
| 3965 | |
| 3966 | Constructs, checks, and returns an op of any type that involves an |
| 3967 | embedded SV. I<type> is the opcode. I<flags> gives the eight bits |
| 3968 | of C<op_flags>. I<sv> gives the SV to embed in the op; this function |
| 3969 | takes ownership of one reference to it. |
| 3970 | |
| 3971 | =cut |
| 3972 | */ |
| 3973 | |
| 3974 | OP * |
| 3975 | Perl_newSVOP(pTHX_ I32 type, I32 flags, SV *sv) |
| 3976 | { |
| 3977 | dVAR; |
| 3978 | SVOP *svop; |
| 3979 | |
| 3980 | PERL_ARGS_ASSERT_NEWSVOP; |
| 3981 | |
| 3982 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP |
| 3983 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_PVOP_OR_SVOP |
| 3984 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_FILESTATOP); |
| 3985 | |
| 3986 | NewOp(1101, svop, 1, SVOP); |
| 3987 | svop->op_type = (OPCODE)type; |
| 3988 | svop->op_ppaddr = PL_ppaddr[type]; |
| 3989 | svop->op_sv = sv; |
| 3990 | svop->op_next = (OP*)svop; |
| 3991 | svop->op_flags = (U8)flags; |
| 3992 | if (PL_opargs[type] & OA_RETSCALAR) |
| 3993 | scalar((OP*)svop); |
| 3994 | if (PL_opargs[type] & OA_TARGET) |
| 3995 | svop->op_targ = pad_alloc(type, SVs_PADTMP); |
| 3996 | return CHECKOP(type, svop); |
| 3997 | } |
| 3998 | |
| 3999 | #ifdef USE_ITHREADS |
| 4000 | |
| 4001 | /* |
| 4002 | =for apidoc Am|OP *|newPADOP|I32 type|I32 flags|SV *sv |
| 4003 | |
| 4004 | Constructs, checks, and returns an op of any type that involves a |
| 4005 | reference to a pad element. I<type> is the opcode. I<flags> gives the |
| 4006 | eight bits of C<op_flags>. A pad slot is automatically allocated, and |
| 4007 | is populated with I<sv>; this function takes ownership of one reference |
| 4008 | to it. |
| 4009 | |
| 4010 | This function only exists if Perl has been compiled to use ithreads. |
| 4011 | |
| 4012 | =cut |
| 4013 | */ |
| 4014 | |
| 4015 | OP * |
| 4016 | Perl_newPADOP(pTHX_ I32 type, I32 flags, SV *sv) |
| 4017 | { |
| 4018 | dVAR; |
| 4019 | PADOP *padop; |
| 4020 | |
| 4021 | PERL_ARGS_ASSERT_NEWPADOP; |
| 4022 | |
| 4023 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_SVOP |
| 4024 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_PVOP_OR_SVOP |
| 4025 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_FILESTATOP); |
| 4026 | |
| 4027 | NewOp(1101, padop, 1, PADOP); |
| 4028 | padop->op_type = (OPCODE)type; |
| 4029 | padop->op_ppaddr = PL_ppaddr[type]; |
| 4030 | padop->op_padix = pad_alloc(type, SVs_PADTMP); |
| 4031 | SvREFCNT_dec(PAD_SVl(padop->op_padix)); |
| 4032 | PAD_SETSV(padop->op_padix, sv); |
| 4033 | assert(sv); |
| 4034 | SvPADTMP_on(sv); |
| 4035 | padop->op_next = (OP*)padop; |
| 4036 | padop->op_flags = (U8)flags; |
| 4037 | if (PL_opargs[type] & OA_RETSCALAR) |
| 4038 | scalar((OP*)padop); |
| 4039 | if (PL_opargs[type] & OA_TARGET) |
| 4040 | padop->op_targ = pad_alloc(type, SVs_PADTMP); |
| 4041 | return CHECKOP(type, padop); |
| 4042 | } |
| 4043 | |
| 4044 | #endif /* !USE_ITHREADS */ |
| 4045 | |
| 4046 | /* |
| 4047 | =for apidoc Am|OP *|newGVOP|I32 type|I32 flags|GV *gv |
| 4048 | |
| 4049 | Constructs, checks, and returns an op of any type that involves an |
| 4050 | embedded reference to a GV. I<type> is the opcode. I<flags> gives the |
| 4051 | eight bits of C<op_flags>. I<gv> identifies the GV that the op should |
| 4052 | reference; calling this function does not transfer ownership of any |
| 4053 | reference to it. |
| 4054 | |
| 4055 | =cut |
| 4056 | */ |
| 4057 | |
| 4058 | OP * |
| 4059 | Perl_newGVOP(pTHX_ I32 type, I32 flags, GV *gv) |
| 4060 | { |
| 4061 | dVAR; |
| 4062 | |
| 4063 | PERL_ARGS_ASSERT_NEWGVOP; |
| 4064 | |
| 4065 | #ifdef USE_ITHREADS |
| 4066 | GvIN_PAD_on(gv); |
| 4067 | return newPADOP(type, flags, SvREFCNT_inc_simple_NN(gv)); |
| 4068 | #else |
| 4069 | return newSVOP(type, flags, SvREFCNT_inc_simple_NN(gv)); |
| 4070 | #endif |
| 4071 | } |
| 4072 | |
| 4073 | /* |
| 4074 | =for apidoc Am|OP *|newPVOP|I32 type|I32 flags|char *pv |
| 4075 | |
| 4076 | Constructs, checks, and returns an op of any type that involves an |
| 4077 | embedded C-level pointer (PV). I<type> is the opcode. I<flags> gives |
| 4078 | the eight bits of C<op_flags>. I<pv> supplies the C-level pointer, which |
| 4079 | must have been allocated using L</PerlMemShared_malloc>; the memory will |
| 4080 | be freed when the op is destroyed. |
| 4081 | |
| 4082 | =cut |
| 4083 | */ |
| 4084 | |
| 4085 | OP * |
| 4086 | Perl_newPVOP(pTHX_ I32 type, I32 flags, char *pv) |
| 4087 | { |
| 4088 | dVAR; |
| 4089 | PVOP *pvop; |
| 4090 | |
| 4091 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_PVOP_OR_SVOP |
| 4092 | || (PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP); |
| 4093 | |
| 4094 | NewOp(1101, pvop, 1, PVOP); |
| 4095 | pvop->op_type = (OPCODE)type; |
| 4096 | pvop->op_ppaddr = PL_ppaddr[type]; |
| 4097 | pvop->op_pv = pv; |
| 4098 | pvop->op_next = (OP*)pvop; |
| 4099 | pvop->op_flags = (U8)flags; |
| 4100 | if (PL_opargs[type] & OA_RETSCALAR) |
| 4101 | scalar((OP*)pvop); |
| 4102 | if (PL_opargs[type] & OA_TARGET) |
| 4103 | pvop->op_targ = pad_alloc(type, SVs_PADTMP); |
| 4104 | return CHECKOP(type, pvop); |
| 4105 | } |
| 4106 | |
| 4107 | #ifdef PERL_MAD |
| 4108 | OP* |
| 4109 | #else |
| 4110 | void |
| 4111 | #endif |
| 4112 | Perl_package(pTHX_ OP *o) |
| 4113 | { |
| 4114 | dVAR; |
| 4115 | SV *const sv = cSVOPo->op_sv; |
| 4116 | #ifdef PERL_MAD |
| 4117 | OP *pegop; |
| 4118 | #endif |
| 4119 | |
| 4120 | PERL_ARGS_ASSERT_PACKAGE; |
| 4121 | |
| 4122 | save_hptr(&PL_curstash); |
| 4123 | save_item(PL_curstname); |
| 4124 | |
| 4125 | PL_curstash = gv_stashsv(sv, GV_ADD); |
| 4126 | |
| 4127 | sv_setsv(PL_curstname, sv); |
| 4128 | |
| 4129 | PL_hints |= HINT_BLOCK_SCOPE; |
| 4130 | PL_parser->copline = NOLINE; |
| 4131 | PL_parser->expect = XSTATE; |
| 4132 | |
| 4133 | #ifndef PERL_MAD |
| 4134 | op_free(o); |
| 4135 | #else |
| 4136 | if (!PL_madskills) { |
| 4137 | op_free(o); |
| 4138 | return NULL; |
| 4139 | } |
| 4140 | |
| 4141 | pegop = newOP(OP_NULL,0); |
| 4142 | op_getmad(o,pegop,'P'); |
| 4143 | return pegop; |
| 4144 | #endif |
| 4145 | } |
| 4146 | |
| 4147 | void |
| 4148 | Perl_package_version( pTHX_ OP *v ) |
| 4149 | { |
| 4150 | dVAR; |
| 4151 | U32 savehints = PL_hints; |
| 4152 | PERL_ARGS_ASSERT_PACKAGE_VERSION; |
| 4153 | PL_hints &= ~HINT_STRICT_VARS; |
| 4154 | sv_setsv( GvSV(gv_fetchpvs("VERSION", GV_ADDMULTI, SVt_PV)), cSVOPx(v)->op_sv ); |
| 4155 | PL_hints = savehints; |
| 4156 | op_free(v); |
| 4157 | } |
| 4158 | |
| 4159 | #ifdef PERL_MAD |
| 4160 | OP* |
| 4161 | #else |
| 4162 | void |
| 4163 | #endif |
| 4164 | Perl_utilize(pTHX_ int aver, I32 floor, OP *version, OP *idop, OP *arg) |
| 4165 | { |
| 4166 | dVAR; |
| 4167 | OP *pack; |
| 4168 | OP *imop; |
| 4169 | OP *veop; |
| 4170 | #ifdef PERL_MAD |
| 4171 | OP *pegop = newOP(OP_NULL,0); |
| 4172 | #endif |
| 4173 | |
| 4174 | PERL_ARGS_ASSERT_UTILIZE; |
| 4175 | |
| 4176 | if (idop->op_type != OP_CONST) |
| 4177 | Perl_croak(aTHX_ "Module name must be constant"); |
| 4178 | |
| 4179 | if (PL_madskills) |
| 4180 | op_getmad(idop,pegop,'U'); |
| 4181 | |
| 4182 | veop = NULL; |
| 4183 | |
| 4184 | if (version) { |
| 4185 | SV * const vesv = ((SVOP*)version)->op_sv; |
| 4186 | |
| 4187 | if (PL_madskills) |
| 4188 | op_getmad(version,pegop,'V'); |
| 4189 | if (!arg && !SvNIOKp(vesv)) { |
| 4190 | arg = version; |
| 4191 | } |
| 4192 | else { |
| 4193 | OP *pack; |
| 4194 | SV *meth; |
| 4195 | |
| 4196 | if (version->op_type != OP_CONST || !SvNIOKp(vesv)) |
| 4197 | Perl_croak(aTHX_ "Version number must be a constant number"); |
| 4198 | |
| 4199 | /* Make copy of idop so we don't free it twice */ |
| 4200 | pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)idop)->op_sv)); |
| 4201 | |
| 4202 | /* Fake up a method call to VERSION */ |
| 4203 | meth = newSVpvs_share("VERSION"); |
| 4204 | veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, |
| 4205 | op_append_elem(OP_LIST, |
| 4206 | op_prepend_elem(OP_LIST, pack, list(version)), |
| 4207 | newSVOP(OP_METHOD_NAMED, 0, meth))); |
| 4208 | } |
| 4209 | } |
| 4210 | |
| 4211 | /* Fake up an import/unimport */ |
| 4212 | if (arg && arg->op_type == OP_STUB) { |
| 4213 | if (PL_madskills) |
| 4214 | op_getmad(arg,pegop,'S'); |
| 4215 | imop = arg; /* no import on explicit () */ |
| 4216 | } |
| 4217 | else if (SvNIOKp(((SVOP*)idop)->op_sv)) { |
| 4218 | imop = NULL; /* use 5.0; */ |
| 4219 | if (!aver) |
| 4220 | idop->op_private |= OPpCONST_NOVER; |
| 4221 | } |
| 4222 | else { |
| 4223 | SV *meth; |
| 4224 | |
| 4225 | if (PL_madskills) |
| 4226 | op_getmad(arg,pegop,'A'); |
| 4227 | |
| 4228 | /* Make copy of idop so we don't free it twice */ |
| 4229 | pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)idop)->op_sv)); |
| 4230 | |
| 4231 | /* Fake up a method call to import/unimport */ |
| 4232 | meth = aver |
| 4233 | ? newSVpvs_share("import") : newSVpvs_share("unimport"); |
| 4234 | imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL, |
| 4235 | op_append_elem(OP_LIST, |
| 4236 | op_prepend_elem(OP_LIST, pack, list(arg)), |
| 4237 | newSVOP(OP_METHOD_NAMED, 0, meth))); |
| 4238 | } |
| 4239 | |
| 4240 | /* Fake up the BEGIN {}, which does its thing immediately. */ |
| 4241 | newATTRSUB(floor, |
| 4242 | newSVOP(OP_CONST, 0, newSVpvs_share("BEGIN")), |
| 4243 | NULL, |
| 4244 | NULL, |
| 4245 | op_append_elem(OP_LINESEQ, |
| 4246 | op_append_elem(OP_LINESEQ, |
| 4247 | newSTATEOP(0, NULL, newUNOP(OP_REQUIRE, 0, idop)), |
| 4248 | newSTATEOP(0, NULL, veop)), |
| 4249 | newSTATEOP(0, NULL, imop) )); |
| 4250 | |
| 4251 | /* The "did you use incorrect case?" warning used to be here. |
| 4252 | * The problem is that on case-insensitive filesystems one |
| 4253 | * might get false positives for "use" (and "require"): |
| 4254 | * "use Strict" or "require CARP" will work. This causes |
| 4255 | * portability problems for the script: in case-strict |
| 4256 | * filesystems the script will stop working. |
| 4257 | * |
| 4258 | * The "incorrect case" warning checked whether "use Foo" |
| 4259 | * imported "Foo" to your namespace, but that is wrong, too: |
| 4260 | * there is no requirement nor promise in the language that |
| 4261 | * a Foo.pm should or would contain anything in package "Foo". |
| 4262 | * |
| 4263 | * There is very little Configure-wise that can be done, either: |
| 4264 | * the case-sensitivity of the build filesystem of Perl does not |
| 4265 | * help in guessing the case-sensitivity of the runtime environment. |
| 4266 | */ |
| 4267 | |
| 4268 | PL_hints |= HINT_BLOCK_SCOPE; |
| 4269 | PL_parser->copline = NOLINE; |
| 4270 | PL_parser->expect = XSTATE; |
| 4271 | PL_cop_seqmax++; /* Purely for B::*'s benefit */ |
| 4272 | |
| 4273 | #ifdef PERL_MAD |
| 4274 | if (!PL_madskills) { |
| 4275 | /* FIXME - don't allocate pegop if !PL_madskills */ |
| 4276 | op_free(pegop); |
| 4277 | return NULL; |
| 4278 | } |
| 4279 | return pegop; |
| 4280 | #endif |
| 4281 | } |
| 4282 | |
| 4283 | /* |
| 4284 | =head1 Embedding Functions |
| 4285 | |
| 4286 | =for apidoc load_module |
| 4287 | |
| 4288 | Loads the module whose name is pointed to by the string part of name. |
| 4289 | Note that the actual module name, not its filename, should be given. |
| 4290 | Eg, "Foo::Bar" instead of "Foo/Bar.pm". flags can be any of |
| 4291 | PERL_LOADMOD_DENY, PERL_LOADMOD_NOIMPORT, or PERL_LOADMOD_IMPORT_OPS |
| 4292 | (or 0 for no flags). ver, if specified, provides version semantics |
| 4293 | similar to C<use Foo::Bar VERSION>. The optional trailing SV* |
| 4294 | arguments can be used to specify arguments to the module's import() |
| 4295 | method, similar to C<use Foo::Bar VERSION LIST>. They must be |
| 4296 | terminated with a final NULL pointer. Note that this list can only |
| 4297 | be omitted when the PERL_LOADMOD_NOIMPORT flag has been used. |
| 4298 | Otherwise at least a single NULL pointer to designate the default |
| 4299 | import list is required. |
| 4300 | |
| 4301 | =cut */ |
| 4302 | |
| 4303 | void |
| 4304 | Perl_load_module(pTHX_ U32 flags, SV *name, SV *ver, ...) |
| 4305 | { |
| 4306 | va_list args; |
| 4307 | |
| 4308 | PERL_ARGS_ASSERT_LOAD_MODULE; |
| 4309 | |
| 4310 | va_start(args, ver); |
| 4311 | vload_module(flags, name, ver, &args); |
| 4312 | va_end(args); |
| 4313 | } |
| 4314 | |
| 4315 | #ifdef PERL_IMPLICIT_CONTEXT |
| 4316 | void |
| 4317 | Perl_load_module_nocontext(U32 flags, SV *name, SV *ver, ...) |
| 4318 | { |
| 4319 | dTHX; |
| 4320 | va_list args; |
| 4321 | PERL_ARGS_ASSERT_LOAD_MODULE_NOCONTEXT; |
| 4322 | va_start(args, ver); |
| 4323 | vload_module(flags, name, ver, &args); |
| 4324 | va_end(args); |
| 4325 | } |
| 4326 | #endif |
| 4327 | |
| 4328 | void |
| 4329 | Perl_vload_module(pTHX_ U32 flags, SV *name, SV *ver, va_list *args) |
| 4330 | { |
| 4331 | dVAR; |
| 4332 | OP *veop, *imop; |
| 4333 | OP * const modname = newSVOP(OP_CONST, 0, name); |
| 4334 | |
| 4335 | PERL_ARGS_ASSERT_VLOAD_MODULE; |
| 4336 | |
| 4337 | modname->op_private |= OPpCONST_BARE; |
| 4338 | if (ver) { |
| 4339 | veop = newSVOP(OP_CONST, 0, ver); |
| 4340 | } |
| 4341 | else |
| 4342 | veop = NULL; |
| 4343 | if (flags & PERL_LOADMOD_NOIMPORT) { |
| 4344 | imop = sawparens(newNULLLIST()); |
| 4345 | } |
| 4346 | else if (flags & PERL_LOADMOD_IMPORT_OPS) { |
| 4347 | imop = va_arg(*args, OP*); |
| 4348 | } |
| 4349 | else { |
| 4350 | SV *sv; |
| 4351 | imop = NULL; |
| 4352 | sv = va_arg(*args, SV*); |
| 4353 | while (sv) { |
| 4354 | imop = op_append_elem(OP_LIST, imop, newSVOP(OP_CONST, 0, sv)); |
| 4355 | sv = va_arg(*args, SV*); |
| 4356 | } |
| 4357 | } |
| 4358 | |
| 4359 | /* utilize() fakes up a BEGIN { require ..; import ... }, so make sure |
| 4360 | * that it has a PL_parser to play with while doing that, and also |
| 4361 | * that it doesn't mess with any existing parser, by creating a tmp |
| 4362 | * new parser with lex_start(). This won't actually be used for much, |
| 4363 | * since pp_require() will create another parser for the real work. */ |
| 4364 | |
| 4365 | ENTER; |
| 4366 | SAVEVPTR(PL_curcop); |
| 4367 | lex_start(NULL, NULL, FALSE); |
| 4368 | utilize(!(flags & PERL_LOADMOD_DENY), start_subparse(FALSE, 0), |
| 4369 | veop, modname, imop); |
| 4370 | LEAVE; |
| 4371 | } |
| 4372 | |
| 4373 | OP * |
| 4374 | Perl_dofile(pTHX_ OP *term, I32 force_builtin) |
| 4375 | { |
| 4376 | dVAR; |
| 4377 | OP *doop; |
| 4378 | GV *gv = NULL; |
| 4379 | |
| 4380 | PERL_ARGS_ASSERT_DOFILE; |
| 4381 | |
| 4382 | if (!force_builtin) { |
| 4383 | gv = gv_fetchpvs("do", GV_NOTQUAL, SVt_PVCV); |
| 4384 | if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) { |
| 4385 | GV * const * const gvp = (GV**)hv_fetchs(PL_globalstash, "do", FALSE); |
| 4386 | gv = gvp ? *gvp : NULL; |
| 4387 | } |
| 4388 | } |
| 4389 | |
| 4390 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) { |
| 4391 | doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 4392 | op_append_elem(OP_LIST, term, |
| 4393 | scalar(newUNOP(OP_RV2CV, 0, |
| 4394 | newGVOP(OP_GV, 0, gv)))))); |
| 4395 | } |
| 4396 | else { |
| 4397 | doop = newUNOP(OP_DOFILE, 0, scalar(term)); |
| 4398 | } |
| 4399 | return doop; |
| 4400 | } |
| 4401 | |
| 4402 | /* |
| 4403 | =head1 Optree construction |
| 4404 | |
| 4405 | =for apidoc Am|OP *|newSLICEOP|I32 flags|OP *subscript|OP *listval |
| 4406 | |
| 4407 | Constructs, checks, and returns an C<lslice> (list slice) op. I<flags> |
| 4408 | gives the eight bits of C<op_flags>, except that C<OPf_KIDS> will |
| 4409 | be set automatically, and, shifted up eight bits, the eight bits of |
| 4410 | C<op_private>, except that the bit with value 1 or 2 is automatically |
| 4411 | set as required. I<listval> and I<subscript> supply the parameters of |
| 4412 | the slice; they are consumed by this function and become part of the |
| 4413 | constructed op tree. |
| 4414 | |
| 4415 | =cut |
| 4416 | */ |
| 4417 | |
| 4418 | OP * |
| 4419 | Perl_newSLICEOP(pTHX_ I32 flags, OP *subscript, OP *listval) |
| 4420 | { |
| 4421 | return newBINOP(OP_LSLICE, flags, |
| 4422 | list(force_list(subscript)), |
| 4423 | list(force_list(listval)) ); |
| 4424 | } |
| 4425 | |
| 4426 | STATIC I32 |
| 4427 | S_is_list_assignment(pTHX_ register const OP *o) |
| 4428 | { |
| 4429 | unsigned type; |
| 4430 | U8 flags; |
| 4431 | |
| 4432 | if (!o) |
| 4433 | return TRUE; |
| 4434 | |
| 4435 | if ((o->op_type == OP_NULL) && (o->op_flags & OPf_KIDS)) |
| 4436 | o = cUNOPo->op_first; |
| 4437 | |
| 4438 | flags = o->op_flags; |
| 4439 | type = o->op_type; |
| 4440 | if (type == OP_COND_EXPR) { |
| 4441 | const I32 t = is_list_assignment(cLOGOPo->op_first->op_sibling); |
| 4442 | const I32 f = is_list_assignment(cLOGOPo->op_first->op_sibling->op_sibling); |
| 4443 | |
| 4444 | if (t && f) |
| 4445 | return TRUE; |
| 4446 | if (t || f) |
| 4447 | yyerror("Assignment to both a list and a scalar"); |
| 4448 | return FALSE; |
| 4449 | } |
| 4450 | |
| 4451 | if (type == OP_LIST && |
| 4452 | (flags & OPf_WANT) == OPf_WANT_SCALAR && |
| 4453 | o->op_private & OPpLVAL_INTRO) |
| 4454 | return FALSE; |
| 4455 | |
| 4456 | if (type == OP_LIST || flags & OPf_PARENS || |
| 4457 | type == OP_RV2AV || type == OP_RV2HV || |
| 4458 | type == OP_ASLICE || type == OP_HSLICE) |
| 4459 | return TRUE; |
| 4460 | |
| 4461 | if (type == OP_PADAV || type == OP_PADHV) |
| 4462 | return TRUE; |
| 4463 | |
| 4464 | if (type == OP_RV2SV) |
| 4465 | return FALSE; |
| 4466 | |
| 4467 | return FALSE; |
| 4468 | } |
| 4469 | |
| 4470 | /* |
| 4471 | =for apidoc Am|OP *|newASSIGNOP|I32 flags|OP *left|I32 optype|OP *right |
| 4472 | |
| 4473 | Constructs, checks, and returns an assignment op. I<left> and I<right> |
| 4474 | supply the parameters of the assignment; they are consumed by this |
| 4475 | function and become part of the constructed op tree. |
| 4476 | |
| 4477 | If I<optype> is C<OP_ANDASSIGN>, C<OP_ORASSIGN>, or C<OP_DORASSIGN>, then |
| 4478 | a suitable conditional optree is constructed. If I<optype> is the opcode |
| 4479 | of a binary operator, such as C<OP_BIT_OR>, then an op is constructed that |
| 4480 | performs the binary operation and assigns the result to the left argument. |
| 4481 | Either way, if I<optype> is non-zero then I<flags> has no effect. |
| 4482 | |
| 4483 | If I<optype> is zero, then a plain scalar or list assignment is |
| 4484 | constructed. Which type of assignment it is is automatically determined. |
| 4485 | I<flags> gives the eight bits of C<op_flags>, except that C<OPf_KIDS> |
| 4486 | will be set automatically, and, shifted up eight bits, the eight bits |
| 4487 | of C<op_private>, except that the bit with value 1 or 2 is automatically |
| 4488 | set as required. |
| 4489 | |
| 4490 | =cut |
| 4491 | */ |
| 4492 | |
| 4493 | OP * |
| 4494 | Perl_newASSIGNOP(pTHX_ I32 flags, OP *left, I32 optype, OP *right) |
| 4495 | { |
| 4496 | dVAR; |
| 4497 | OP *o; |
| 4498 | |
| 4499 | if (optype) { |
| 4500 | if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN || optype == OP_DORASSIGN) { |
| 4501 | return newLOGOP(optype, 0, |
| 4502 | mod(scalar(left), optype), |
| 4503 | newUNOP(OP_SASSIGN, 0, scalar(right))); |
| 4504 | } |
| 4505 | else { |
| 4506 | return newBINOP(optype, OPf_STACKED, |
| 4507 | mod(scalar(left), optype), scalar(right)); |
| 4508 | } |
| 4509 | } |
| 4510 | |
| 4511 | if (is_list_assignment(left)) { |
| 4512 | static const char no_list_state[] = "Initialization of state variables" |
| 4513 | " in list context currently forbidden"; |
| 4514 | OP *curop; |
| 4515 | bool maybe_common_vars = TRUE; |
| 4516 | |
| 4517 | PL_modcount = 0; |
| 4518 | /* Grandfathering $[ assignment here. Bletch.*/ |
| 4519 | /* Only simple assignments like C<< ($[) = 1 >> are allowed */ |
| 4520 | PL_eval_start = (left->op_type == OP_CONST) ? right : NULL; |
| 4521 | left = mod(left, OP_AASSIGN); |
| 4522 | if (PL_eval_start) |
| 4523 | PL_eval_start = 0; |
| 4524 | else if (left->op_type == OP_CONST) { |
| 4525 | deprecate("assignment to $["); |
| 4526 | /* FIXME for MAD */ |
| 4527 | /* Result of assignment is always 1 (or we'd be dead already) */ |
| 4528 | return newSVOP(OP_CONST, 0, newSViv(1)); |
| 4529 | } |
| 4530 | curop = list(force_list(left)); |
| 4531 | o = newBINOP(OP_AASSIGN, flags, list(force_list(right)), curop); |
| 4532 | o->op_private = (U8)(0 | (flags >> 8)); |
| 4533 | |
| 4534 | if ((left->op_type == OP_LIST |
| 4535 | || (left->op_type == OP_NULL && left->op_targ == OP_LIST))) |
| 4536 | { |
| 4537 | OP* lop = ((LISTOP*)left)->op_first; |
| 4538 | maybe_common_vars = FALSE; |
| 4539 | while (lop) { |
| 4540 | if (lop->op_type == OP_PADSV || |
| 4541 | lop->op_type == OP_PADAV || |
| 4542 | lop->op_type == OP_PADHV || |
| 4543 | lop->op_type == OP_PADANY) { |
| 4544 | if (!(lop->op_private & OPpLVAL_INTRO)) |
| 4545 | maybe_common_vars = TRUE; |
| 4546 | |
| 4547 | if (lop->op_private & OPpPAD_STATE) { |
| 4548 | if (left->op_private & OPpLVAL_INTRO) { |
| 4549 | /* Each variable in state($a, $b, $c) = ... */ |
| 4550 | } |
| 4551 | else { |
| 4552 | /* Each state variable in |
| 4553 | (state $a, my $b, our $c, $d, undef) = ... */ |
| 4554 | } |
| 4555 | yyerror(no_list_state); |
| 4556 | } else { |
| 4557 | /* Each my variable in |
| 4558 | (state $a, my $b, our $c, $d, undef) = ... */ |
| 4559 | } |
| 4560 | } else if (lop->op_type == OP_UNDEF || |
| 4561 | lop->op_type == OP_PUSHMARK) { |
| 4562 | /* undef may be interesting in |
| 4563 | (state $a, undef, state $c) */ |
| 4564 | } else { |
| 4565 | /* Other ops in the list. */ |
| 4566 | maybe_common_vars = TRUE; |
| 4567 | } |
| 4568 | lop = lop->op_sibling; |
| 4569 | } |
| 4570 | } |
| 4571 | else if ((left->op_private & OPpLVAL_INTRO) |
| 4572 | && ( left->op_type == OP_PADSV |
| 4573 | || left->op_type == OP_PADAV |
| 4574 | || left->op_type == OP_PADHV |
| 4575 | || left->op_type == OP_PADANY)) |
| 4576 | { |
| 4577 | if (left->op_type == OP_PADSV) maybe_common_vars = FALSE; |
| 4578 | if (left->op_private & OPpPAD_STATE) { |
| 4579 | /* All single variable list context state assignments, hence |
| 4580 | state ($a) = ... |
| 4581 | (state $a) = ... |
| 4582 | state @a = ... |
| 4583 | state (@a) = ... |
| 4584 | (state @a) = ... |
| 4585 | state %a = ... |
| 4586 | state (%a) = ... |
| 4587 | (state %a) = ... |
| 4588 | */ |
| 4589 | yyerror(no_list_state); |
| 4590 | } |
| 4591 | } |
| 4592 | |
| 4593 | /* PL_generation sorcery: |
| 4594 | * an assignment like ($a,$b) = ($c,$d) is easier than |
| 4595 | * ($a,$b) = ($c,$a), since there is no need for temporary vars. |
| 4596 | * To detect whether there are common vars, the global var |
| 4597 | * PL_generation is incremented for each assign op we compile. |
| 4598 | * Then, while compiling the assign op, we run through all the |
| 4599 | * variables on both sides of the assignment, setting a spare slot |
| 4600 | * in each of them to PL_generation. If any of them already have |
| 4601 | * that value, we know we've got commonality. We could use a |
| 4602 | * single bit marker, but then we'd have to make 2 passes, first |
| 4603 | * to clear the flag, then to test and set it. To find somewhere |
| 4604 | * to store these values, evil chicanery is done with SvUVX(). |
| 4605 | */ |
| 4606 | |
| 4607 | if (maybe_common_vars) { |
| 4608 | OP *lastop = o; |
| 4609 | PL_generation++; |
| 4610 | for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) { |
| 4611 | if (PL_opargs[curop->op_type] & OA_DANGEROUS) { |
| 4612 | if (curop->op_type == OP_GV) { |
| 4613 | GV *gv = cGVOPx_gv(curop); |
| 4614 | if (gv == PL_defgv |
| 4615 | || (int)GvASSIGN_GENERATION(gv) == PL_generation) |
| 4616 | break; |
| 4617 | GvASSIGN_GENERATION_set(gv, PL_generation); |
| 4618 | } |
| 4619 | else if (curop->op_type == OP_PADSV || |
| 4620 | curop->op_type == OP_PADAV || |
| 4621 | curop->op_type == OP_PADHV || |
| 4622 | curop->op_type == OP_PADANY) |
| 4623 | { |
| 4624 | if (PAD_COMPNAME_GEN(curop->op_targ) |
| 4625 | == (STRLEN)PL_generation) |
| 4626 | break; |
| 4627 | PAD_COMPNAME_GEN_set(curop->op_targ, PL_generation); |
| 4628 | |
| 4629 | } |
| 4630 | else if (curop->op_type == OP_RV2CV) |
| 4631 | break; |
| 4632 | else if (curop->op_type == OP_RV2SV || |
| 4633 | curop->op_type == OP_RV2AV || |
| 4634 | curop->op_type == OP_RV2HV || |
| 4635 | curop->op_type == OP_RV2GV) { |
| 4636 | if (lastop->op_type != OP_GV) /* funny deref? */ |
| 4637 | break; |
| 4638 | } |
| 4639 | else if (curop->op_type == OP_PUSHRE) { |
| 4640 | #ifdef USE_ITHREADS |
| 4641 | if (((PMOP*)curop)->op_pmreplrootu.op_pmtargetoff) { |
| 4642 | GV *const gv = MUTABLE_GV(PAD_SVl(((PMOP*)curop)->op_pmreplrootu.op_pmtargetoff)); |
| 4643 | if (gv == PL_defgv |
| 4644 | || (int)GvASSIGN_GENERATION(gv) == PL_generation) |
| 4645 | break; |
| 4646 | GvASSIGN_GENERATION_set(gv, PL_generation); |
| 4647 | } |
| 4648 | #else |
| 4649 | GV *const gv |
| 4650 | = ((PMOP*)curop)->op_pmreplrootu.op_pmtargetgv; |
| 4651 | if (gv) { |
| 4652 | if (gv == PL_defgv |
| 4653 | || (int)GvASSIGN_GENERATION(gv) == PL_generation) |
| 4654 | break; |
| 4655 | GvASSIGN_GENERATION_set(gv, PL_generation); |
| 4656 | } |
| 4657 | #endif |
| 4658 | } |
| 4659 | else |
| 4660 | break; |
| 4661 | } |
| 4662 | lastop = curop; |
| 4663 | } |
| 4664 | if (curop != o) |
| 4665 | o->op_private |= OPpASSIGN_COMMON; |
| 4666 | } |
| 4667 | |
| 4668 | if (right && right->op_type == OP_SPLIT && !PL_madskills) { |
| 4669 | OP* tmpop = ((LISTOP*)right)->op_first; |
| 4670 | if (tmpop && (tmpop->op_type == OP_PUSHRE)) { |
| 4671 | PMOP * const pm = (PMOP*)tmpop; |
| 4672 | if (left->op_type == OP_RV2AV && |
| 4673 | !(left->op_private & OPpLVAL_INTRO) && |
| 4674 | !(o->op_private & OPpASSIGN_COMMON) ) |
| 4675 | { |
| 4676 | tmpop = ((UNOP*)left)->op_first; |
| 4677 | if (tmpop->op_type == OP_GV |
| 4678 | #ifdef USE_ITHREADS |
| 4679 | && !pm->op_pmreplrootu.op_pmtargetoff |
| 4680 | #else |
| 4681 | && !pm->op_pmreplrootu.op_pmtargetgv |
| 4682 | #endif |
| 4683 | ) { |
| 4684 | #ifdef USE_ITHREADS |
| 4685 | pm->op_pmreplrootu.op_pmtargetoff |
| 4686 | = cPADOPx(tmpop)->op_padix; |
| 4687 | cPADOPx(tmpop)->op_padix = 0; /* steal it */ |
| 4688 | #else |
| 4689 | pm->op_pmreplrootu.op_pmtargetgv |
| 4690 | = MUTABLE_GV(cSVOPx(tmpop)->op_sv); |
| 4691 | cSVOPx(tmpop)->op_sv = NULL; /* steal it */ |
| 4692 | #endif |
| 4693 | pm->op_pmflags |= PMf_ONCE; |
| 4694 | tmpop = cUNOPo->op_first; /* to list (nulled) */ |
| 4695 | tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */ |
| 4696 | tmpop->op_sibling = NULL; /* don't free split */ |
| 4697 | right->op_next = tmpop->op_next; /* fix starting loc */ |
| 4698 | op_free(o); /* blow off assign */ |
| 4699 | right->op_flags &= ~OPf_WANT; |
| 4700 | /* "I don't know and I don't care." */ |
| 4701 | return right; |
| 4702 | } |
| 4703 | } |
| 4704 | else { |
| 4705 | if (PL_modcount < RETURN_UNLIMITED_NUMBER && |
| 4706 | ((LISTOP*)right)->op_last->op_type == OP_CONST) |
| 4707 | { |
| 4708 | SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv; |
| 4709 | if (SvIOK(sv) && SvIVX(sv) == 0) |
| 4710 | sv_setiv(sv, PL_modcount+1); |
| 4711 | } |
| 4712 | } |
| 4713 | } |
| 4714 | } |
| 4715 | return o; |
| 4716 | } |
| 4717 | if (!right) |
| 4718 | right = newOP(OP_UNDEF, 0); |
| 4719 | if (right->op_type == OP_READLINE) { |
| 4720 | right->op_flags |= OPf_STACKED; |
| 4721 | return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right)); |
| 4722 | } |
| 4723 | else { |
| 4724 | PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/ |
| 4725 | o = newBINOP(OP_SASSIGN, flags, |
| 4726 | scalar(right), mod(scalar(left), OP_SASSIGN) ); |
| 4727 | if (PL_eval_start) |
| 4728 | PL_eval_start = 0; |
| 4729 | else { |
| 4730 | if (!PL_madskills) { /* assignment to $[ is ignored when making a mad dump */ |
| 4731 | deprecate("assignment to $["); |
| 4732 | op_free(o); |
| 4733 | o = newSVOP(OP_CONST, 0, newSViv(CopARYBASE_get(&PL_compiling))); |
| 4734 | o->op_private |= OPpCONST_ARYBASE; |
| 4735 | } |
| 4736 | } |
| 4737 | } |
| 4738 | return o; |
| 4739 | } |
| 4740 | |
| 4741 | /* |
| 4742 | =for apidoc Am|OP *|newSTATEOP|I32 flags|char *label|OP *o |
| 4743 | |
| 4744 | Constructs a state op (COP). The state op is normally a C<nextstate> op, |
| 4745 | but will be a C<dbstate> op if debugging is enabled for currently-compiled |
| 4746 | code. The state op is populated from L</PL_curcop> (or L</PL_compiling>). |
| 4747 | If I<label> is non-null, it supplies the name of a label to attach to |
| 4748 | the state op; this function takes ownership of the memory pointed at by |
| 4749 | I<label>, and will free it. I<flags> gives the eight bits of C<op_flags> |
| 4750 | for the state op. |
| 4751 | |
| 4752 | If I<o> is null, the state op is returned. Otherwise the state op is |
| 4753 | combined with I<o> into a C<lineseq> list op, which is returned. I<o> |
| 4754 | is consumed by this function and becomes part of the returned op tree. |
| 4755 | |
| 4756 | =cut |
| 4757 | */ |
| 4758 | |
| 4759 | OP * |
| 4760 | Perl_newSTATEOP(pTHX_ I32 flags, char *label, OP *o) |
| 4761 | { |
| 4762 | dVAR; |
| 4763 | const U32 seq = intro_my(); |
| 4764 | register COP *cop; |
| 4765 | |
| 4766 | NewOp(1101, cop, 1, COP); |
| 4767 | if (PERLDB_LINE && CopLINE(PL_curcop) && PL_curstash != PL_debstash) { |
| 4768 | cop->op_type = OP_DBSTATE; |
| 4769 | cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ]; |
| 4770 | } |
| 4771 | else { |
| 4772 | cop->op_type = OP_NEXTSTATE; |
| 4773 | cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ]; |
| 4774 | } |
| 4775 | cop->op_flags = (U8)flags; |
| 4776 | CopHINTS_set(cop, PL_hints); |
| 4777 | #ifdef NATIVE_HINTS |
| 4778 | cop->op_private |= NATIVE_HINTS; |
| 4779 | #endif |
| 4780 | CopHINTS_set(&PL_compiling, CopHINTS_get(cop)); |
| 4781 | cop->op_next = (OP*)cop; |
| 4782 | |
| 4783 | cop->cop_seq = seq; |
| 4784 | /* CopARYBASE is now "virtual", in that it's stored as a flag bit in |
| 4785 | CopHINTS and a possible value in cop_hints_hash, so no need to copy it. |
| 4786 | */ |
| 4787 | cop->cop_warnings = DUP_WARNINGS(PL_curcop->cop_warnings); |
| 4788 | cop->cop_hints_hash = PL_curcop->cop_hints_hash; |
| 4789 | if (cop->cop_hints_hash) { |
| 4790 | HINTS_REFCNT_LOCK; |
| 4791 | cop->cop_hints_hash->refcounted_he_refcnt++; |
| 4792 | HINTS_REFCNT_UNLOCK; |
| 4793 | } |
| 4794 | if (label) { |
| 4795 | Perl_store_cop_label(aTHX_ cop, label, strlen(label), 0); |
| 4796 | |
| 4797 | PL_hints |= HINT_BLOCK_SCOPE; |
| 4798 | /* It seems that we need to defer freeing this pointer, as other parts |
| 4799 | of the grammar end up wanting to copy it after this op has been |
| 4800 | created. */ |
| 4801 | SAVEFREEPV(label); |
| 4802 | } |
| 4803 | |
| 4804 | if (PL_parser && PL_parser->copline == NOLINE) |
| 4805 | CopLINE_set(cop, CopLINE(PL_curcop)); |
| 4806 | else { |
| 4807 | CopLINE_set(cop, PL_parser->copline); |
| 4808 | if (PL_parser) |
| 4809 | PL_parser->copline = NOLINE; |
| 4810 | } |
| 4811 | #ifdef USE_ITHREADS |
| 4812 | CopFILE_set(cop, CopFILE(PL_curcop)); /* XXX share in a pvtable? */ |
| 4813 | #else |
| 4814 | CopFILEGV_set(cop, CopFILEGV(PL_curcop)); |
| 4815 | #endif |
| 4816 | CopSTASH_set(cop, PL_curstash); |
| 4817 | |
| 4818 | if ((PERLDB_LINE || PERLDB_SAVESRC) && PL_curstash != PL_debstash) { |
| 4819 | /* this line can have a breakpoint - store the cop in IV */ |
| 4820 | AV *av = CopFILEAVx(PL_curcop); |
| 4821 | if (av) { |
| 4822 | SV * const * const svp = av_fetch(av, (I32)CopLINE(cop), FALSE); |
| 4823 | if (svp && *svp != &PL_sv_undef ) { |
| 4824 | (void)SvIOK_on(*svp); |
| 4825 | SvIV_set(*svp, PTR2IV(cop)); |
| 4826 | } |
| 4827 | } |
| 4828 | } |
| 4829 | |
| 4830 | if (flags & OPf_SPECIAL) |
| 4831 | op_null((OP*)cop); |
| 4832 | return op_prepend_elem(OP_LINESEQ, (OP*)cop, o); |
| 4833 | } |
| 4834 | |
| 4835 | /* |
| 4836 | =for apidoc Am|OP *|newLOGOP|I32 type|I32 flags|OP *first|OP *other |
| 4837 | |
| 4838 | Constructs, checks, and returns a logical (flow control) op. I<type> |
| 4839 | is the opcode. I<flags> gives the eight bits of C<op_flags>, except |
| 4840 | that C<OPf_KIDS> will be set automatically, and, shifted up eight bits, |
| 4841 | the eight bits of C<op_private>, except that the bit with value 1 is |
| 4842 | automatically set. I<first> supplies the expression controlling the |
| 4843 | flow, and I<other> supplies the side (alternate) chain of ops; they are |
| 4844 | consumed by this function and become part of the constructed op tree. |
| 4845 | |
| 4846 | =cut |
| 4847 | */ |
| 4848 | |
| 4849 | OP * |
| 4850 | Perl_newLOGOP(pTHX_ I32 type, I32 flags, OP *first, OP *other) |
| 4851 | { |
| 4852 | dVAR; |
| 4853 | |
| 4854 | PERL_ARGS_ASSERT_NEWLOGOP; |
| 4855 | |
| 4856 | return new_logop(type, flags, &first, &other); |
| 4857 | } |
| 4858 | |
| 4859 | STATIC OP * |
| 4860 | S_search_const(pTHX_ OP *o) |
| 4861 | { |
| 4862 | PERL_ARGS_ASSERT_SEARCH_CONST; |
| 4863 | |
| 4864 | switch (o->op_type) { |
| 4865 | case OP_CONST: |
| 4866 | return o; |
| 4867 | case OP_NULL: |
| 4868 | if (o->op_flags & OPf_KIDS) |
| 4869 | return search_const(cUNOPo->op_first); |
| 4870 | break; |
| 4871 | case OP_LEAVE: |
| 4872 | case OP_SCOPE: |
| 4873 | case OP_LINESEQ: |
| 4874 | { |
| 4875 | OP *kid; |
| 4876 | if (!(o->op_flags & OPf_KIDS)) |
| 4877 | return NULL; |
| 4878 | kid = cLISTOPo->op_first; |
| 4879 | do { |
| 4880 | switch (kid->op_type) { |
| 4881 | case OP_ENTER: |
| 4882 | case OP_NULL: |
| 4883 | case OP_NEXTSTATE: |
| 4884 | kid = kid->op_sibling; |
| 4885 | break; |
| 4886 | default: |
| 4887 | if (kid != cLISTOPo->op_last) |
| 4888 | return NULL; |
| 4889 | goto last; |
| 4890 | } |
| 4891 | } while (kid); |
| 4892 | if (!kid) |
| 4893 | kid = cLISTOPo->op_last; |
| 4894 | last: |
| 4895 | return search_const(kid); |
| 4896 | } |
| 4897 | } |
| 4898 | |
| 4899 | return NULL; |
| 4900 | } |
| 4901 | |
| 4902 | STATIC OP * |
| 4903 | S_new_logop(pTHX_ I32 type, I32 flags, OP** firstp, OP** otherp) |
| 4904 | { |
| 4905 | dVAR; |
| 4906 | LOGOP *logop; |
| 4907 | OP *o; |
| 4908 | OP *first; |
| 4909 | OP *other; |
| 4910 | OP *cstop = NULL; |
| 4911 | int prepend_not = 0; |
| 4912 | |
| 4913 | PERL_ARGS_ASSERT_NEW_LOGOP; |
| 4914 | |
| 4915 | first = *firstp; |
| 4916 | other = *otherp; |
| 4917 | |
| 4918 | if (type == OP_XOR) /* Not short circuit, but here by precedence. */ |
| 4919 | return newBINOP(type, flags, scalar(first), scalar(other)); |
| 4920 | |
| 4921 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_LOGOP); |
| 4922 | |
| 4923 | scalarboolean(first); |
| 4924 | /* optimize AND and OR ops that have NOTs as children */ |
| 4925 | if (first->op_type == OP_NOT |
| 4926 | && (first->op_flags & OPf_KIDS) |
| 4927 | && ((first->op_flags & OPf_SPECIAL) /* unless ($x) { } */ |
| 4928 | || (other->op_type == OP_NOT)) /* if (!$x && !$y) { } */ |
| 4929 | && !PL_madskills) { |
| 4930 | if (type == OP_AND || type == OP_OR) { |
| 4931 | if (type == OP_AND) |
| 4932 | type = OP_OR; |
| 4933 | else |
| 4934 | type = OP_AND; |
| 4935 | op_null(first); |
| 4936 | if (other->op_type == OP_NOT) { /* !a AND|OR !b => !(a OR|AND b) */ |
| 4937 | op_null(other); |
| 4938 | prepend_not = 1; /* prepend a NOT op later */ |
| 4939 | } |
| 4940 | } |
| 4941 | } |
| 4942 | /* search for a constant op that could let us fold the test */ |
| 4943 | if ((cstop = search_const(first))) { |
| 4944 | if (cstop->op_private & OPpCONST_STRICT) |
| 4945 | no_bareword_allowed(cstop); |
| 4946 | else if ((cstop->op_private & OPpCONST_BARE)) |
| 4947 | Perl_ck_warner(aTHX_ packWARN(WARN_BAREWORD), "Bareword found in conditional"); |
| 4948 | if ((type == OP_AND && SvTRUE(((SVOP*)cstop)->op_sv)) || |
| 4949 | (type == OP_OR && !SvTRUE(((SVOP*)cstop)->op_sv)) || |
| 4950 | (type == OP_DOR && !SvOK(((SVOP*)cstop)->op_sv))) { |
| 4951 | *firstp = NULL; |
| 4952 | if (other->op_type == OP_CONST) |
| 4953 | other->op_private |= OPpCONST_SHORTCIRCUIT; |
| 4954 | if (PL_madskills) { |
| 4955 | OP *newop = newUNOP(OP_NULL, 0, other); |
| 4956 | op_getmad(first, newop, '1'); |
| 4957 | newop->op_targ = type; /* set "was" field */ |
| 4958 | return newop; |
| 4959 | } |
| 4960 | op_free(first); |
| 4961 | if (other->op_type == OP_LEAVE) |
| 4962 | other = newUNOP(OP_NULL, OPf_SPECIAL, other); |
| 4963 | else if (other->op_type == OP_MATCH |
| 4964 | || other->op_type == OP_SUBST |
| 4965 | || other->op_type == OP_TRANS) |
| 4966 | /* Mark the op as being unbindable with =~ */ |
| 4967 | other->op_flags |= OPf_SPECIAL; |
| 4968 | return other; |
| 4969 | } |
| 4970 | else { |
| 4971 | /* check for C<my $x if 0>, or C<my($x,$y) if 0> */ |
| 4972 | const OP *o2 = other; |
| 4973 | if ( ! (o2->op_type == OP_LIST |
| 4974 | && (( o2 = cUNOPx(o2)->op_first)) |
| 4975 | && o2->op_type == OP_PUSHMARK |
| 4976 | && (( o2 = o2->op_sibling)) ) |
| 4977 | ) |
| 4978 | o2 = other; |
| 4979 | if ((o2->op_type == OP_PADSV || o2->op_type == OP_PADAV |
| 4980 | || o2->op_type == OP_PADHV) |
| 4981 | && o2->op_private & OPpLVAL_INTRO |
| 4982 | && !(o2->op_private & OPpPAD_STATE)) |
| 4983 | { |
| 4984 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 4985 | "Deprecated use of my() in false conditional"); |
| 4986 | } |
| 4987 | |
| 4988 | *otherp = NULL; |
| 4989 | if (first->op_type == OP_CONST) |
| 4990 | first->op_private |= OPpCONST_SHORTCIRCUIT; |
| 4991 | if (PL_madskills) { |
| 4992 | first = newUNOP(OP_NULL, 0, first); |
| 4993 | op_getmad(other, first, '2'); |
| 4994 | first->op_targ = type; /* set "was" field */ |
| 4995 | } |
| 4996 | else |
| 4997 | op_free(other); |
| 4998 | return first; |
| 4999 | } |
| 5000 | } |
| 5001 | else if ((first->op_flags & OPf_KIDS) && type != OP_DOR |
| 5002 | && ckWARN(WARN_MISC)) /* [#24076] Don't warn for <FH> err FOO. */ |
| 5003 | { |
| 5004 | const OP * const k1 = ((UNOP*)first)->op_first; |
| 5005 | const OP * const k2 = k1->op_sibling; |
| 5006 | OPCODE warnop = 0; |
| 5007 | switch (first->op_type) |
| 5008 | { |
| 5009 | case OP_NULL: |
| 5010 | if (k2 && k2->op_type == OP_READLINE |
| 5011 | && (k2->op_flags & OPf_STACKED) |
| 5012 | && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) |
| 5013 | { |
| 5014 | warnop = k2->op_type; |
| 5015 | } |
| 5016 | break; |
| 5017 | |
| 5018 | case OP_SASSIGN: |
| 5019 | if (k1->op_type == OP_READDIR |
| 5020 | || k1->op_type == OP_GLOB |
| 5021 | || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB) |
| 5022 | || k1->op_type == OP_EACH) |
| 5023 | { |
| 5024 | warnop = ((k1->op_type == OP_NULL) |
| 5025 | ? (OPCODE)k1->op_targ : k1->op_type); |
| 5026 | } |
| 5027 | break; |
| 5028 | } |
| 5029 | if (warnop) { |
| 5030 | const line_t oldline = CopLINE(PL_curcop); |
| 5031 | CopLINE_set(PL_curcop, PL_parser->copline); |
| 5032 | Perl_warner(aTHX_ packWARN(WARN_MISC), |
| 5033 | "Value of %s%s can be \"0\"; test with defined()", |
| 5034 | PL_op_desc[warnop], |
| 5035 | ((warnop == OP_READLINE || warnop == OP_GLOB) |
| 5036 | ? " construct" : "() operator")); |
| 5037 | CopLINE_set(PL_curcop, oldline); |
| 5038 | } |
| 5039 | } |
| 5040 | |
| 5041 | if (!other) |
| 5042 | return first; |
| 5043 | |
| 5044 | if (type == OP_ANDASSIGN || type == OP_ORASSIGN || type == OP_DORASSIGN) |
| 5045 | other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */ |
| 5046 | |
| 5047 | NewOp(1101, logop, 1, LOGOP); |
| 5048 | |
| 5049 | logop->op_type = (OPCODE)type; |
| 5050 | logop->op_ppaddr = PL_ppaddr[type]; |
| 5051 | logop->op_first = first; |
| 5052 | logop->op_flags = (U8)(flags | OPf_KIDS); |
| 5053 | logop->op_other = LINKLIST(other); |
| 5054 | logop->op_private = (U8)(1 | (flags >> 8)); |
| 5055 | |
| 5056 | /* establish postfix order */ |
| 5057 | logop->op_next = LINKLIST(first); |
| 5058 | first->op_next = (OP*)logop; |
| 5059 | first->op_sibling = other; |
| 5060 | |
| 5061 | CHECKOP(type,logop); |
| 5062 | |
| 5063 | o = newUNOP(prepend_not ? OP_NOT : OP_NULL, 0, (OP*)logop); |
| 5064 | other->op_next = o; |
| 5065 | |
| 5066 | return o; |
| 5067 | } |
| 5068 | |
| 5069 | /* |
| 5070 | =for apidoc Am|OP *|newCONDOP|I32 flags|OP *first|OP *trueop|OP *falseop |
| 5071 | |
| 5072 | Constructs, checks, and returns a conditional-expression (C<cond_expr>) |
| 5073 | op. I<flags> gives the eight bits of C<op_flags>, except that C<OPf_KIDS> |
| 5074 | will be set automatically, and, shifted up eight bits, the eight bits of |
| 5075 | C<op_private>, except that the bit with value 1 is automatically set. |
| 5076 | I<first> supplies the expression selecting between the two branches, |
| 5077 | and I<trueop> and I<falseop> supply the branches; they are consumed by |
| 5078 | this function and become part of the constructed op tree. |
| 5079 | |
| 5080 | =cut |
| 5081 | */ |
| 5082 | |
| 5083 | OP * |
| 5084 | Perl_newCONDOP(pTHX_ I32 flags, OP *first, OP *trueop, OP *falseop) |
| 5085 | { |
| 5086 | dVAR; |
| 5087 | LOGOP *logop; |
| 5088 | OP *start; |
| 5089 | OP *o; |
| 5090 | OP *cstop; |
| 5091 | |
| 5092 | PERL_ARGS_ASSERT_NEWCONDOP; |
| 5093 | |
| 5094 | if (!falseop) |
| 5095 | return newLOGOP(OP_AND, 0, first, trueop); |
| 5096 | if (!trueop) |
| 5097 | return newLOGOP(OP_OR, 0, first, falseop); |
| 5098 | |
| 5099 | scalarboolean(first); |
| 5100 | if ((cstop = search_const(first))) { |
| 5101 | /* Left or right arm of the conditional? */ |
| 5102 | const bool left = SvTRUE(((SVOP*)cstop)->op_sv); |
| 5103 | OP *live = left ? trueop : falseop; |
| 5104 | OP *const dead = left ? falseop : trueop; |
| 5105 | if (cstop->op_private & OPpCONST_BARE && |
| 5106 | cstop->op_private & OPpCONST_STRICT) { |
| 5107 | no_bareword_allowed(cstop); |
| 5108 | } |
| 5109 | if (PL_madskills) { |
| 5110 | /* This is all dead code when PERL_MAD is not defined. */ |
| 5111 | live = newUNOP(OP_NULL, 0, live); |
| 5112 | op_getmad(first, live, 'C'); |
| 5113 | op_getmad(dead, live, left ? 'e' : 't'); |
| 5114 | } else { |
| 5115 | op_free(first); |
| 5116 | op_free(dead); |
| 5117 | } |
| 5118 | if (live->op_type == OP_LEAVE) |
| 5119 | live = newUNOP(OP_NULL, OPf_SPECIAL, live); |
| 5120 | else if (live->op_type == OP_MATCH || live->op_type == OP_SUBST |
| 5121 | || live->op_type == OP_TRANS) |
| 5122 | /* Mark the op as being unbindable with =~ */ |
| 5123 | live->op_flags |= OPf_SPECIAL; |
| 5124 | return live; |
| 5125 | } |
| 5126 | NewOp(1101, logop, 1, LOGOP); |
| 5127 | logop->op_type = OP_COND_EXPR; |
| 5128 | logop->op_ppaddr = PL_ppaddr[OP_COND_EXPR]; |
| 5129 | logop->op_first = first; |
| 5130 | logop->op_flags = (U8)(flags | OPf_KIDS); |
| 5131 | logop->op_private = (U8)(1 | (flags >> 8)); |
| 5132 | logop->op_other = LINKLIST(trueop); |
| 5133 | logop->op_next = LINKLIST(falseop); |
| 5134 | |
| 5135 | CHECKOP(OP_COND_EXPR, /* that's logop->op_type */ |
| 5136 | logop); |
| 5137 | |
| 5138 | /* establish postfix order */ |
| 5139 | start = LINKLIST(first); |
| 5140 | first->op_next = (OP*)logop; |
| 5141 | |
| 5142 | first->op_sibling = trueop; |
| 5143 | trueop->op_sibling = falseop; |
| 5144 | o = newUNOP(OP_NULL, 0, (OP*)logop); |
| 5145 | |
| 5146 | trueop->op_next = falseop->op_next = o; |
| 5147 | |
| 5148 | o->op_next = start; |
| 5149 | return o; |
| 5150 | } |
| 5151 | |
| 5152 | /* |
| 5153 | =for apidoc Am|OP *|newRANGE|I32 flags|OP *left|OP *right |
| 5154 | |
| 5155 | Constructs and returns a C<range> op, with subordinate C<flip> and |
| 5156 | C<flop> ops. I<flags> gives the eight bits of C<op_flags> for the |
| 5157 | C<flip> op and, shifted up eight bits, the eight bits of C<op_private> |
| 5158 | for both the C<flip> and C<range> ops, except that the bit with value |
| 5159 | 1 is automatically set. I<left> and I<right> supply the expressions |
| 5160 | controlling the endpoints of the range; they are consumed by this function |
| 5161 | and become part of the constructed op tree. |
| 5162 | |
| 5163 | =cut |
| 5164 | */ |
| 5165 | |
| 5166 | OP * |
| 5167 | Perl_newRANGE(pTHX_ I32 flags, OP *left, OP *right) |
| 5168 | { |
| 5169 | dVAR; |
| 5170 | LOGOP *range; |
| 5171 | OP *flip; |
| 5172 | OP *flop; |
| 5173 | OP *leftstart; |
| 5174 | OP *o; |
| 5175 | |
| 5176 | PERL_ARGS_ASSERT_NEWRANGE; |
| 5177 | |
| 5178 | NewOp(1101, range, 1, LOGOP); |
| 5179 | |
| 5180 | range->op_type = OP_RANGE; |
| 5181 | range->op_ppaddr = PL_ppaddr[OP_RANGE]; |
| 5182 | range->op_first = left; |
| 5183 | range->op_flags = OPf_KIDS; |
| 5184 | leftstart = LINKLIST(left); |
| 5185 | range->op_other = LINKLIST(right); |
| 5186 | range->op_private = (U8)(1 | (flags >> 8)); |
| 5187 | |
| 5188 | left->op_sibling = right; |
| 5189 | |
| 5190 | range->op_next = (OP*)range; |
| 5191 | flip = newUNOP(OP_FLIP, flags, (OP*)range); |
| 5192 | flop = newUNOP(OP_FLOP, 0, flip); |
| 5193 | o = newUNOP(OP_NULL, 0, flop); |
| 5194 | LINKLIST(flop); |
| 5195 | range->op_next = leftstart; |
| 5196 | |
| 5197 | left->op_next = flip; |
| 5198 | right->op_next = flop; |
| 5199 | |
| 5200 | range->op_targ = pad_alloc(OP_RANGE, SVs_PADMY); |
| 5201 | sv_upgrade(PAD_SV(range->op_targ), SVt_PVNV); |
| 5202 | flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY); |
| 5203 | sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV); |
| 5204 | |
| 5205 | flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0; |
| 5206 | flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0; |
| 5207 | |
| 5208 | flip->op_next = o; |
| 5209 | if (!flip->op_private || !flop->op_private) |
| 5210 | LINKLIST(o); /* blow off optimizer unless constant */ |
| 5211 | |
| 5212 | return o; |
| 5213 | } |
| 5214 | |
| 5215 | /* |
| 5216 | =for apidoc Am|OP *|newLOOPOP|I32 flags|I32 debuggable|OP *expr|OP *block |
| 5217 | |
| 5218 | Constructs, checks, and returns an op tree expressing a loop. This is |
| 5219 | only a loop in the control flow through the op tree; it does not have |
| 5220 | the heavyweight loop structure that allows exiting the loop by C<last> |
| 5221 | and suchlike. I<flags> gives the eight bits of C<op_flags> for the |
| 5222 | top-level op, except that some bits will be set automatically as required. |
| 5223 | I<expr> supplies the expression controlling loop iteration, and I<block> |
| 5224 | supplies the body of the loop; they are consumed by this function and |
| 5225 | become part of the constructed op tree. I<debuggable> is currently |
| 5226 | unused and should always be 1. |
| 5227 | |
| 5228 | =cut |
| 5229 | */ |
| 5230 | |
| 5231 | OP * |
| 5232 | Perl_newLOOPOP(pTHX_ I32 flags, I32 debuggable, OP *expr, OP *block) |
| 5233 | { |
| 5234 | dVAR; |
| 5235 | OP* listop; |
| 5236 | OP* o; |
| 5237 | const bool once = block && block->op_flags & OPf_SPECIAL && |
| 5238 | (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL); |
| 5239 | |
| 5240 | PERL_UNUSED_ARG(debuggable); |
| 5241 | |
| 5242 | if (expr) { |
| 5243 | if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv)) |
| 5244 | return block; /* do {} while 0 does once */ |
| 5245 | if (expr->op_type == OP_READLINE |
| 5246 | || expr->op_type == OP_READDIR |
| 5247 | || expr->op_type == OP_GLOB |
| 5248 | || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) { |
| 5249 | expr = newUNOP(OP_DEFINED, 0, |
| 5250 | newASSIGNOP(0, newDEFSVOP(), 0, expr) ); |
| 5251 | } else if (expr->op_flags & OPf_KIDS) { |
| 5252 | const OP * const k1 = ((UNOP*)expr)->op_first; |
| 5253 | const OP * const k2 = k1 ? k1->op_sibling : NULL; |
| 5254 | switch (expr->op_type) { |
| 5255 | case OP_NULL: |
| 5256 | if (k2 && (k2->op_type == OP_READLINE || k2->op_type == OP_READDIR) |
| 5257 | && (k2->op_flags & OPf_STACKED) |
| 5258 | && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) |
| 5259 | expr = newUNOP(OP_DEFINED, 0, expr); |
| 5260 | break; |
| 5261 | |
| 5262 | case OP_SASSIGN: |
| 5263 | if (k1 && (k1->op_type == OP_READDIR |
| 5264 | || k1->op_type == OP_GLOB |
| 5265 | || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB) |
| 5266 | || k1->op_type == OP_EACH)) |
| 5267 | expr = newUNOP(OP_DEFINED, 0, expr); |
| 5268 | break; |
| 5269 | } |
| 5270 | } |
| 5271 | } |
| 5272 | |
| 5273 | /* if block is null, the next op_append_elem() would put UNSTACK, a scalar |
| 5274 | * op, in listop. This is wrong. [perl #27024] */ |
| 5275 | if (!block) |
| 5276 | block = newOP(OP_NULL, 0); |
| 5277 | listop = op_append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0)); |
| 5278 | o = new_logop(OP_AND, 0, &expr, &listop); |
| 5279 | |
| 5280 | if (listop) |
| 5281 | ((LISTOP*)listop)->op_last->op_next = LINKLIST(o); |
| 5282 | |
| 5283 | if (once && o != listop) |
| 5284 | o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other; |
| 5285 | |
| 5286 | if (o == listop) |
| 5287 | o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */ |
| 5288 | |
| 5289 | o->op_flags |= flags; |
| 5290 | o = scope(o); |
| 5291 | o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/ |
| 5292 | return o; |
| 5293 | } |
| 5294 | |
| 5295 | /* |
| 5296 | =for apidoc Am|OP *|newWHILEOP|I32 flags|I32 debuggable|LOOP *loop|I32 whileline|OP *expr|OP *block|OP *cont|I32 has_my |
| 5297 | |
| 5298 | Constructs, checks, and returns an op tree expressing a C<while> loop. |
| 5299 | This is a heavyweight loop, with structure that allows exiting the loop |
| 5300 | by C<last> and suchlike. |
| 5301 | |
| 5302 | I<loop> is an optional preconstructed C<enterloop> op to use in the |
| 5303 | loop; if it is null then a suitable op will be constructed automatically. |
| 5304 | I<expr> supplies the loop's controlling expression. I<block> supplies the |
| 5305 | main body of the loop, and I<cont> optionally supplies a C<continue> block |
| 5306 | that operates as a second half of the body. All of these optree inputs |
| 5307 | are consumed by this function and become part of the constructed op tree. |
| 5308 | |
| 5309 | I<flags> gives the eight bits of C<op_flags> for the C<leaveloop> |
| 5310 | op and, shifted up eight bits, the eight bits of C<op_private> for |
| 5311 | the C<leaveloop> op, except that (in both cases) some bits will be set |
| 5312 | automatically. I<debuggable> is currently unused and should always be 1. |
| 5313 | I<whileline> is the line number that should be attributed to the loop's |
| 5314 | controlling expression. I<has_my> can be supplied as true to force the |
| 5315 | loop body to be enclosed in its own scope. |
| 5316 | |
| 5317 | =cut |
| 5318 | */ |
| 5319 | |
| 5320 | OP * |
| 5321 | Perl_newWHILEOP(pTHX_ I32 flags, I32 debuggable, LOOP *loop, I32 |
| 5322 | whileline, OP *expr, OP *block, OP *cont, I32 has_my) |
| 5323 | { |
| 5324 | dVAR; |
| 5325 | OP *redo; |
| 5326 | OP *next = NULL; |
| 5327 | OP *listop; |
| 5328 | OP *o; |
| 5329 | U8 loopflags = 0; |
| 5330 | |
| 5331 | PERL_UNUSED_ARG(debuggable); |
| 5332 | |
| 5333 | if (expr) { |
| 5334 | if (expr->op_type == OP_READLINE |
| 5335 | || expr->op_type == OP_READDIR |
| 5336 | || expr->op_type == OP_GLOB |
| 5337 | || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) { |
| 5338 | expr = newUNOP(OP_DEFINED, 0, |
| 5339 | newASSIGNOP(0, newDEFSVOP(), 0, expr) ); |
| 5340 | } else if (expr->op_flags & OPf_KIDS) { |
| 5341 | const OP * const k1 = ((UNOP*)expr)->op_first; |
| 5342 | const OP * const k2 = (k1) ? k1->op_sibling : NULL; |
| 5343 | switch (expr->op_type) { |
| 5344 | case OP_NULL: |
| 5345 | if (k2 && (k2->op_type == OP_READLINE || k2->op_type == OP_READDIR) |
| 5346 | && (k2->op_flags & OPf_STACKED) |
| 5347 | && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR)) |
| 5348 | expr = newUNOP(OP_DEFINED, 0, expr); |
| 5349 | break; |
| 5350 | |
| 5351 | case OP_SASSIGN: |
| 5352 | if (k1 && (k1->op_type == OP_READDIR |
| 5353 | || k1->op_type == OP_GLOB |
| 5354 | || (k1->op_type == OP_NULL && k1->op_targ == OP_GLOB) |
| 5355 | || k1->op_type == OP_EACH)) |
| 5356 | expr = newUNOP(OP_DEFINED, 0, expr); |
| 5357 | break; |
| 5358 | } |
| 5359 | } |
| 5360 | } |
| 5361 | |
| 5362 | if (!block) |
| 5363 | block = newOP(OP_NULL, 0); |
| 5364 | else if (cont || has_my) { |
| 5365 | block = scope(block); |
| 5366 | } |
| 5367 | |
| 5368 | if (cont) { |
| 5369 | next = LINKLIST(cont); |
| 5370 | } |
| 5371 | if (expr) { |
| 5372 | OP * const unstack = newOP(OP_UNSTACK, 0); |
| 5373 | if (!next) |
| 5374 | next = unstack; |
| 5375 | cont = op_append_elem(OP_LINESEQ, cont, unstack); |
| 5376 | } |
| 5377 | |
| 5378 | assert(block); |
| 5379 | listop = op_append_list(OP_LINESEQ, block, cont); |
| 5380 | assert(listop); |
| 5381 | redo = LINKLIST(listop); |
| 5382 | |
| 5383 | if (expr) { |
| 5384 | PL_parser->copline = (line_t)whileline; |
| 5385 | scalar(listop); |
| 5386 | o = new_logop(OP_AND, 0, &expr, &listop); |
| 5387 | if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) { |
| 5388 | op_free(expr); /* oops, it's a while (0) */ |
| 5389 | op_free((OP*)loop); |
| 5390 | return NULL; /* listop already freed by new_logop */ |
| 5391 | } |
| 5392 | if (listop) |
| 5393 | ((LISTOP*)listop)->op_last->op_next = |
| 5394 | (o == listop ? redo : LINKLIST(o)); |
| 5395 | } |
| 5396 | else |
| 5397 | o = listop; |
| 5398 | |
| 5399 | if (!loop) { |
| 5400 | NewOp(1101,loop,1,LOOP); |
| 5401 | loop->op_type = OP_ENTERLOOP; |
| 5402 | loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP]; |
| 5403 | loop->op_private = 0; |
| 5404 | loop->op_next = (OP*)loop; |
| 5405 | } |
| 5406 | |
| 5407 | o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o); |
| 5408 | |
| 5409 | loop->op_redoop = redo; |
| 5410 | loop->op_lastop = o; |
| 5411 | o->op_private |= loopflags; |
| 5412 | |
| 5413 | if (next) |
| 5414 | loop->op_nextop = next; |
| 5415 | else |
| 5416 | loop->op_nextop = o; |
| 5417 | |
| 5418 | o->op_flags |= flags; |
| 5419 | o->op_private |= (flags >> 8); |
| 5420 | return o; |
| 5421 | } |
| 5422 | |
| 5423 | /* |
| 5424 | =for apidoc Am|OP *|newFOROP|I32 flags|char *label|line_t forline|OP *sv|OP *expr|OP *block|OP *cont |
| 5425 | |
| 5426 | Constructs, checks, and returns an op tree expressing a C<foreach> |
| 5427 | loop (iteration through a list of values). This is a heavyweight loop, |
| 5428 | with structure that allows exiting the loop by C<last> and suchlike. |
| 5429 | |
| 5430 | I<sv> optionally supplies the variable that will be aliased to each |
| 5431 | item in turn; if null, it defaults to C<$_> (either lexical or global). |
| 5432 | I<expr> supplies the list of values to iterate over. I<block> supplies |
| 5433 | the main body of the loop, and I<cont> optionally supplies a C<continue> |
| 5434 | block that operates as a second half of the body. All of these optree |
| 5435 | inputs are consumed by this function and become part of the constructed |
| 5436 | op tree. |
| 5437 | |
| 5438 | I<flags> gives the eight bits of C<op_flags> for the C<leaveloop> |
| 5439 | op and, shifted up eight bits, the eight bits of C<op_private> for |
| 5440 | the C<leaveloop> op, except that (in both cases) some bits will be set |
| 5441 | automatically. I<forline> is the line number that should be attributed |
| 5442 | to the loop's list expression. If I<label> is non-null, it supplies |
| 5443 | the name of a label to attach to the state op at the start of the loop; |
| 5444 | this function takes ownership of the memory pointed at by I<label>, |
| 5445 | and will free it. |
| 5446 | |
| 5447 | =cut |
| 5448 | */ |
| 5449 | |
| 5450 | OP * |
| 5451 | Perl_newFOROP(pTHX_ I32 flags, char *label, line_t forline, OP *sv, OP *expr, OP *block, OP *cont) |
| 5452 | { |
| 5453 | dVAR; |
| 5454 | LOOP *loop; |
| 5455 | OP *wop; |
| 5456 | PADOFFSET padoff = 0; |
| 5457 | I32 iterflags = 0; |
| 5458 | I32 iterpflags = 0; |
| 5459 | OP *madsv = NULL; |
| 5460 | |
| 5461 | PERL_ARGS_ASSERT_NEWFOROP; |
| 5462 | |
| 5463 | if (sv) { |
| 5464 | if (sv->op_type == OP_RV2SV) { /* symbol table variable */ |
| 5465 | iterpflags = sv->op_private & OPpOUR_INTRO; /* for our $x () */ |
| 5466 | sv->op_type = OP_RV2GV; |
| 5467 | sv->op_ppaddr = PL_ppaddr[OP_RV2GV]; |
| 5468 | |
| 5469 | /* The op_type check is needed to prevent a possible segfault |
| 5470 | * if the loop variable is undeclared and 'strict vars' is in |
| 5471 | * effect. This is illegal but is nonetheless parsed, so we |
| 5472 | * may reach this point with an OP_CONST where we're expecting |
| 5473 | * an OP_GV. |
| 5474 | */ |
| 5475 | if (cUNOPx(sv)->op_first->op_type == OP_GV |
| 5476 | && cGVOPx_gv(cUNOPx(sv)->op_first) == PL_defgv) |
| 5477 | iterpflags |= OPpITER_DEF; |
| 5478 | } |
| 5479 | else if (sv->op_type == OP_PADSV) { /* private variable */ |
| 5480 | iterpflags = sv->op_private & OPpLVAL_INTRO; /* for my $x () */ |
| 5481 | padoff = sv->op_targ; |
| 5482 | if (PL_madskills) |
| 5483 | madsv = sv; |
| 5484 | else { |
| 5485 | sv->op_targ = 0; |
| 5486 | op_free(sv); |
| 5487 | } |
| 5488 | sv = NULL; |
| 5489 | } |
| 5490 | else |
| 5491 | Perl_croak(aTHX_ "Can't use %s for loop variable", PL_op_desc[sv->op_type]); |
| 5492 | if (padoff) { |
| 5493 | SV *const namesv = PAD_COMPNAME_SV(padoff); |
| 5494 | STRLEN len; |
| 5495 | const char *const name = SvPV_const(namesv, len); |
| 5496 | |
| 5497 | if (len == 2 && name[0] == '$' && name[1] == '_') |
| 5498 | iterpflags |= OPpITER_DEF; |
| 5499 | } |
| 5500 | } |
| 5501 | else { |
| 5502 | const PADOFFSET offset = Perl_pad_findmy(aTHX_ STR_WITH_LEN("$_"), 0); |
| 5503 | if (offset == NOT_IN_PAD || PAD_COMPNAME_FLAGS_isOUR(offset)) { |
| 5504 | sv = newGVOP(OP_GV, 0, PL_defgv); |
| 5505 | } |
| 5506 | else { |
| 5507 | padoff = offset; |
| 5508 | } |
| 5509 | iterpflags |= OPpITER_DEF; |
| 5510 | } |
| 5511 | if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) { |
| 5512 | expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART); |
| 5513 | iterflags |= OPf_STACKED; |
| 5514 | } |
| 5515 | else if (expr->op_type == OP_NULL && |
| 5516 | (expr->op_flags & OPf_KIDS) && |
| 5517 | ((BINOP*)expr)->op_first->op_type == OP_FLOP) |
| 5518 | { |
| 5519 | /* Basically turn for($x..$y) into the same as for($x,$y), but we |
| 5520 | * set the STACKED flag to indicate that these values are to be |
| 5521 | * treated as min/max values by 'pp_iterinit'. |
| 5522 | */ |
| 5523 | const UNOP* const flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first; |
| 5524 | LOGOP* const range = (LOGOP*) flip->op_first; |
| 5525 | OP* const left = range->op_first; |
| 5526 | OP* const right = left->op_sibling; |
| 5527 | LISTOP* listop; |
| 5528 | |
| 5529 | range->op_flags &= ~OPf_KIDS; |
| 5530 | range->op_first = NULL; |
| 5531 | |
| 5532 | listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right); |
| 5533 | listop->op_first->op_next = range->op_next; |
| 5534 | left->op_next = range->op_other; |
| 5535 | right->op_next = (OP*)listop; |
| 5536 | listop->op_next = listop->op_first; |
| 5537 | |
| 5538 | #ifdef PERL_MAD |
| 5539 | op_getmad(expr,(OP*)listop,'O'); |
| 5540 | #else |
| 5541 | op_free(expr); |
| 5542 | #endif |
| 5543 | expr = (OP*)(listop); |
| 5544 | op_null(expr); |
| 5545 | iterflags |= OPf_STACKED; |
| 5546 | } |
| 5547 | else { |
| 5548 | expr = mod(force_list(expr), OP_GREPSTART); |
| 5549 | } |
| 5550 | |
| 5551 | loop = (LOOP*)list(convert(OP_ENTERITER, iterflags, |
| 5552 | op_append_elem(OP_LIST, expr, scalar(sv)))); |
| 5553 | assert(!loop->op_next); |
| 5554 | /* for my $x () sets OPpLVAL_INTRO; |
| 5555 | * for our $x () sets OPpOUR_INTRO */ |
| 5556 | loop->op_private = (U8)iterpflags; |
| 5557 | #ifdef PL_OP_SLAB_ALLOC |
| 5558 | { |
| 5559 | LOOP *tmp; |
| 5560 | NewOp(1234,tmp,1,LOOP); |
| 5561 | Copy(loop,tmp,1,LISTOP); |
| 5562 | S_op_destroy(aTHX_ (OP*)loop); |
| 5563 | loop = tmp; |
| 5564 | } |
| 5565 | #else |
| 5566 | loop = (LOOP*)PerlMemShared_realloc(loop, sizeof(LOOP)); |
| 5567 | #endif |
| 5568 | loop->op_targ = padoff; |
| 5569 | wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont, 0); |
| 5570 | if (madsv) |
| 5571 | op_getmad(madsv, (OP*)loop, 'v'); |
| 5572 | PL_parser->copline = forline; |
| 5573 | return newSTATEOP(0, label, wop); |
| 5574 | } |
| 5575 | |
| 5576 | /* |
| 5577 | =for apidoc Am|OP *|newLOOPEX|I32 type|OP *label |
| 5578 | |
| 5579 | Constructs, checks, and returns a loop-exiting op (such as C<goto> |
| 5580 | or C<last>). I<type> is the opcode. I<label> supplies the parameter |
| 5581 | determining the target of the op; it is consumed by this function and |
| 5582 | become part of the constructed op tree. |
| 5583 | |
| 5584 | =cut |
| 5585 | */ |
| 5586 | |
| 5587 | OP* |
| 5588 | Perl_newLOOPEX(pTHX_ I32 type, OP *label) |
| 5589 | { |
| 5590 | dVAR; |
| 5591 | OP *o; |
| 5592 | |
| 5593 | PERL_ARGS_ASSERT_NEWLOOPEX; |
| 5594 | |
| 5595 | assert((PL_opargs[type] & OA_CLASS_MASK) == OA_LOOPEXOP); |
| 5596 | |
| 5597 | if (type != OP_GOTO || label->op_type == OP_CONST) { |
| 5598 | /* "last()" means "last" */ |
| 5599 | if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS)) |
| 5600 | o = newOP(type, OPf_SPECIAL); |
| 5601 | else { |
| 5602 | o = newPVOP(type, 0, savesharedpv(label->op_type == OP_CONST |
| 5603 | ? SvPV_nolen_const(((SVOP*)label)->op_sv) |
| 5604 | : "")); |
| 5605 | } |
| 5606 | #ifdef PERL_MAD |
| 5607 | op_getmad(label,o,'L'); |
| 5608 | #else |
| 5609 | op_free(label); |
| 5610 | #endif |
| 5611 | } |
| 5612 | else { |
| 5613 | /* Check whether it's going to be a goto &function */ |
| 5614 | if (label->op_type == OP_ENTERSUB |
| 5615 | && !(label->op_flags & OPf_STACKED)) |
| 5616 | label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN)); |
| 5617 | o = newUNOP(type, OPf_STACKED, label); |
| 5618 | } |
| 5619 | PL_hints |= HINT_BLOCK_SCOPE; |
| 5620 | return o; |
| 5621 | } |
| 5622 | |
| 5623 | /* if the condition is a literal array or hash |
| 5624 | (or @{ ... } etc), make a reference to it. |
| 5625 | */ |
| 5626 | STATIC OP * |
| 5627 | S_ref_array_or_hash(pTHX_ OP *cond) |
| 5628 | { |
| 5629 | if (cond |
| 5630 | && (cond->op_type == OP_RV2AV |
| 5631 | || cond->op_type == OP_PADAV |
| 5632 | || cond->op_type == OP_RV2HV |
| 5633 | || cond->op_type == OP_PADHV)) |
| 5634 | |
| 5635 | return newUNOP(OP_REFGEN, |
| 5636 | 0, mod(cond, OP_REFGEN)); |
| 5637 | |
| 5638 | else if(cond |
| 5639 | && (cond->op_type == OP_ASLICE |
| 5640 | || cond->op_type == OP_HSLICE)) { |
| 5641 | |
| 5642 | /* anonlist now needs a list from this op, was previously used in |
| 5643 | * scalar context */ |
| 5644 | cond->op_flags |= ~(OPf_WANT_SCALAR | OPf_REF); |
| 5645 | cond->op_flags |= OPf_WANT_LIST; |
| 5646 | |
| 5647 | return newANONLIST(mod(cond, OP_ANONLIST)); |
| 5648 | } |
| 5649 | |
| 5650 | else |
| 5651 | return cond; |
| 5652 | } |
| 5653 | |
| 5654 | /* These construct the optree fragments representing given() |
| 5655 | and when() blocks. |
| 5656 | |
| 5657 | entergiven and enterwhen are LOGOPs; the op_other pointer |
| 5658 | points up to the associated leave op. We need this so we |
| 5659 | can put it in the context and make break/continue work. |
| 5660 | (Also, of course, pp_enterwhen will jump straight to |
| 5661 | op_other if the match fails.) |
| 5662 | */ |
| 5663 | |
| 5664 | STATIC OP * |
| 5665 | S_newGIVWHENOP(pTHX_ OP *cond, OP *block, |
| 5666 | I32 enter_opcode, I32 leave_opcode, |
| 5667 | PADOFFSET entertarg) |
| 5668 | { |
| 5669 | dVAR; |
| 5670 | LOGOP *enterop; |
| 5671 | OP *o; |
| 5672 | |
| 5673 | PERL_ARGS_ASSERT_NEWGIVWHENOP; |
| 5674 | |
| 5675 | NewOp(1101, enterop, 1, LOGOP); |
| 5676 | enterop->op_type = (Optype)enter_opcode; |
| 5677 | enterop->op_ppaddr = PL_ppaddr[enter_opcode]; |
| 5678 | enterop->op_flags = (U8) OPf_KIDS; |
| 5679 | enterop->op_targ = ((entertarg == NOT_IN_PAD) ? 0 : entertarg); |
| 5680 | enterop->op_private = 0; |
| 5681 | |
| 5682 | o = newUNOP(leave_opcode, 0, (OP *) enterop); |
| 5683 | |
| 5684 | if (cond) { |
| 5685 | enterop->op_first = scalar(cond); |
| 5686 | cond->op_sibling = block; |
| 5687 | |
| 5688 | o->op_next = LINKLIST(cond); |
| 5689 | cond->op_next = (OP *) enterop; |
| 5690 | } |
| 5691 | else { |
| 5692 | /* This is a default {} block */ |
| 5693 | enterop->op_first = block; |
| 5694 | enterop->op_flags |= OPf_SPECIAL; |
| 5695 | |
| 5696 | o->op_next = (OP *) enterop; |
| 5697 | } |
| 5698 | |
| 5699 | CHECKOP(enter_opcode, enterop); /* Currently does nothing, since |
| 5700 | entergiven and enterwhen both |
| 5701 | use ck_null() */ |
| 5702 | |
| 5703 | enterop->op_next = LINKLIST(block); |
| 5704 | block->op_next = enterop->op_other = o; |
| 5705 | |
| 5706 | return o; |
| 5707 | } |
| 5708 | |
| 5709 | /* Does this look like a boolean operation? For these purposes |
| 5710 | a boolean operation is: |
| 5711 | - a subroutine call [*] |
| 5712 | - a logical connective |
| 5713 | - a comparison operator |
| 5714 | - a filetest operator, with the exception of -s -M -A -C |
| 5715 | - defined(), exists() or eof() |
| 5716 | - /$re/ or $foo =~ /$re/ |
| 5717 | |
| 5718 | [*] possibly surprising |
| 5719 | */ |
| 5720 | STATIC bool |
| 5721 | S_looks_like_bool(pTHX_ const OP *o) |
| 5722 | { |
| 5723 | dVAR; |
| 5724 | |
| 5725 | PERL_ARGS_ASSERT_LOOKS_LIKE_BOOL; |
| 5726 | |
| 5727 | switch(o->op_type) { |
| 5728 | case OP_OR: |
| 5729 | case OP_DOR: |
| 5730 | return looks_like_bool(cLOGOPo->op_first); |
| 5731 | |
| 5732 | case OP_AND: |
| 5733 | return ( |
| 5734 | looks_like_bool(cLOGOPo->op_first) |
| 5735 | && looks_like_bool(cLOGOPo->op_first->op_sibling)); |
| 5736 | |
| 5737 | case OP_NULL: |
| 5738 | case OP_SCALAR: |
| 5739 | return ( |
| 5740 | o->op_flags & OPf_KIDS |
| 5741 | && looks_like_bool(cUNOPo->op_first)); |
| 5742 | |
| 5743 | case OP_ENTERSUB: |
| 5744 | |
| 5745 | case OP_NOT: case OP_XOR: |
| 5746 | |
| 5747 | case OP_EQ: case OP_NE: case OP_LT: |
| 5748 | case OP_GT: case OP_LE: case OP_GE: |
| 5749 | |
| 5750 | case OP_I_EQ: case OP_I_NE: case OP_I_LT: |
| 5751 | case OP_I_GT: case OP_I_LE: case OP_I_GE: |
| 5752 | |
| 5753 | case OP_SEQ: case OP_SNE: case OP_SLT: |
| 5754 | case OP_SGT: case OP_SLE: case OP_SGE: |
| 5755 | |
| 5756 | case OP_SMARTMATCH: |
| 5757 | |
| 5758 | case OP_FTRREAD: case OP_FTRWRITE: case OP_FTREXEC: |
| 5759 | case OP_FTEREAD: case OP_FTEWRITE: case OP_FTEEXEC: |
| 5760 | case OP_FTIS: case OP_FTEOWNED: case OP_FTROWNED: |
| 5761 | case OP_FTZERO: case OP_FTSOCK: case OP_FTCHR: |
| 5762 | case OP_FTBLK: case OP_FTFILE: case OP_FTDIR: |
| 5763 | case OP_FTPIPE: case OP_FTLINK: case OP_FTSUID: |
| 5764 | case OP_FTSGID: case OP_FTSVTX: case OP_FTTTY: |
| 5765 | case OP_FTTEXT: case OP_FTBINARY: |
| 5766 | |
| 5767 | case OP_DEFINED: case OP_EXISTS: |
| 5768 | case OP_MATCH: case OP_EOF: |
| 5769 | |
| 5770 | case OP_FLOP: |
| 5771 | |
| 5772 | return TRUE; |
| 5773 | |
| 5774 | case OP_CONST: |
| 5775 | /* Detect comparisons that have been optimized away */ |
| 5776 | if (cSVOPo->op_sv == &PL_sv_yes |
| 5777 | || cSVOPo->op_sv == &PL_sv_no) |
| 5778 | |
| 5779 | return TRUE; |
| 5780 | else |
| 5781 | return FALSE; |
| 5782 | |
| 5783 | /* FALL THROUGH */ |
| 5784 | default: |
| 5785 | return FALSE; |
| 5786 | } |
| 5787 | } |
| 5788 | |
| 5789 | /* |
| 5790 | =for apidoc Am|OP *|newGIVENOP|OP *cond|OP *block|PADOFFSET defsv_off |
| 5791 | |
| 5792 | Constructs, checks, and returns an op tree expressing a C<given> block. |
| 5793 | I<cond> supplies the expression that will be locally assigned to a lexical |
| 5794 | variable, and I<block> supplies the body of the C<given> construct; they |
| 5795 | are consumed by this function and become part of the constructed op tree. |
| 5796 | I<defsv_off> is the pad offset of the scalar lexical variable that will |
| 5797 | be affected. |
| 5798 | |
| 5799 | =cut |
| 5800 | */ |
| 5801 | |
| 5802 | OP * |
| 5803 | Perl_newGIVENOP(pTHX_ OP *cond, OP *block, PADOFFSET defsv_off) |
| 5804 | { |
| 5805 | dVAR; |
| 5806 | PERL_ARGS_ASSERT_NEWGIVENOP; |
| 5807 | return newGIVWHENOP( |
| 5808 | ref_array_or_hash(cond), |
| 5809 | block, |
| 5810 | OP_ENTERGIVEN, OP_LEAVEGIVEN, |
| 5811 | defsv_off); |
| 5812 | } |
| 5813 | |
| 5814 | /* |
| 5815 | =for apidoc Am|OP *|newWHENOP|OP *cond|OP *block |
| 5816 | |
| 5817 | Constructs, checks, and returns an op tree expressing a C<when> block. |
| 5818 | I<cond> supplies the test expression, and I<block> supplies the block |
| 5819 | that will be executed if the test evaluates to true; they are consumed |
| 5820 | by this function and become part of the constructed op tree. I<cond> |
| 5821 | will be interpreted DWIMically, often as a comparison against C<$_>, |
| 5822 | and may be null to generate a C<default> block. |
| 5823 | |
| 5824 | =cut |
| 5825 | */ |
| 5826 | |
| 5827 | OP * |
| 5828 | Perl_newWHENOP(pTHX_ OP *cond, OP *block) |
| 5829 | { |
| 5830 | const bool cond_llb = (!cond || looks_like_bool(cond)); |
| 5831 | OP *cond_op; |
| 5832 | |
| 5833 | PERL_ARGS_ASSERT_NEWWHENOP; |
| 5834 | |
| 5835 | if (cond_llb) |
| 5836 | cond_op = cond; |
| 5837 | else { |
| 5838 | cond_op = newBINOP(OP_SMARTMATCH, OPf_SPECIAL, |
| 5839 | newDEFSVOP(), |
| 5840 | scalar(ref_array_or_hash(cond))); |
| 5841 | } |
| 5842 | |
| 5843 | return newGIVWHENOP( |
| 5844 | cond_op, |
| 5845 | op_append_elem(block->op_type, block, newOP(OP_BREAK, OPf_SPECIAL)), |
| 5846 | OP_ENTERWHEN, OP_LEAVEWHEN, 0); |
| 5847 | } |
| 5848 | |
| 5849 | /* |
| 5850 | =head1 Embedding Functions |
| 5851 | |
| 5852 | =for apidoc cv_undef |
| 5853 | |
| 5854 | Clear out all the active components of a CV. This can happen either |
| 5855 | by an explicit C<undef &foo>, or by the reference count going to zero. |
| 5856 | In the former case, we keep the CvOUTSIDE pointer, so that any anonymous |
| 5857 | children can still follow the full lexical scope chain. |
| 5858 | |
| 5859 | =cut |
| 5860 | */ |
| 5861 | |
| 5862 | void |
| 5863 | Perl_cv_undef(pTHX_ CV *cv) |
| 5864 | { |
| 5865 | dVAR; |
| 5866 | |
| 5867 | PERL_ARGS_ASSERT_CV_UNDEF; |
| 5868 | |
| 5869 | DEBUG_X(PerlIO_printf(Perl_debug_log, |
| 5870 | "CV undef: cv=0x%"UVxf" comppad=0x%"UVxf"\n", |
| 5871 | PTR2UV(cv), PTR2UV(PL_comppad)) |
| 5872 | ); |
| 5873 | |
| 5874 | #ifdef USE_ITHREADS |
| 5875 | if (CvFILE(cv) && !CvISXSUB(cv)) { |
| 5876 | /* for XSUBs CvFILE point directly to static memory; __FILE__ */ |
| 5877 | Safefree(CvFILE(cv)); |
| 5878 | } |
| 5879 | CvFILE(cv) = NULL; |
| 5880 | #endif |
| 5881 | |
| 5882 | if (!CvISXSUB(cv) && CvROOT(cv)) { |
| 5883 | if (SvTYPE(cv) == SVt_PVCV && CvDEPTH(cv)) |
| 5884 | Perl_croak(aTHX_ "Can't undef active subroutine"); |
| 5885 | ENTER; |
| 5886 | |
| 5887 | PAD_SAVE_SETNULLPAD(); |
| 5888 | |
| 5889 | op_free(CvROOT(cv)); |
| 5890 | CvROOT(cv) = NULL; |
| 5891 | CvSTART(cv) = NULL; |
| 5892 | LEAVE; |
| 5893 | } |
| 5894 | SvPOK_off(MUTABLE_SV(cv)); /* forget prototype */ |
| 5895 | CvGV_set(cv, NULL); |
| 5896 | |
| 5897 | pad_undef(cv); |
| 5898 | |
| 5899 | /* remove CvOUTSIDE unless this is an undef rather than a free */ |
| 5900 | if (!SvREFCNT(cv) && CvOUTSIDE(cv)) { |
| 5901 | if (!CvWEAKOUTSIDE(cv)) |
| 5902 | SvREFCNT_dec(CvOUTSIDE(cv)); |
| 5903 | CvOUTSIDE(cv) = NULL; |
| 5904 | } |
| 5905 | if (CvCONST(cv)) { |
| 5906 | SvREFCNT_dec(MUTABLE_SV(CvXSUBANY(cv).any_ptr)); |
| 5907 | CvCONST_off(cv); |
| 5908 | } |
| 5909 | if (CvISXSUB(cv) && CvXSUB(cv)) { |
| 5910 | CvXSUB(cv) = NULL; |
| 5911 | } |
| 5912 | /* delete all flags except WEAKOUTSIDE and CVGV_RC, which indicate the |
| 5913 | * ref status of CvOUTSIDE and CvGV */ |
| 5914 | CvFLAGS(cv) &= (CVf_WEAKOUTSIDE|CVf_CVGV_RC); |
| 5915 | } |
| 5916 | |
| 5917 | void |
| 5918 | Perl_cv_ckproto_len(pTHX_ const CV *cv, const GV *gv, const char *p, |
| 5919 | const STRLEN len) |
| 5920 | { |
| 5921 | PERL_ARGS_ASSERT_CV_CKPROTO_LEN; |
| 5922 | |
| 5923 | /* Can't just use a strcmp on the prototype, as CONSTSUBs "cheat" by |
| 5924 | relying on SvCUR, and doubling up the buffer to hold CvFILE(). */ |
| 5925 | if (((!p != !SvPOK(cv)) /* One has prototype, one has not. */ |
| 5926 | || (p && (len != SvCUR(cv) /* Not the same length. */ |
| 5927 | || memNE(p, SvPVX_const(cv), len)))) |
| 5928 | && ckWARN_d(WARN_PROTOTYPE)) { |
| 5929 | SV* const msg = sv_newmortal(); |
| 5930 | SV* name = NULL; |
| 5931 | |
| 5932 | if (gv) |
| 5933 | gv_efullname3(name = sv_newmortal(), gv, NULL); |
| 5934 | sv_setpvs(msg, "Prototype mismatch:"); |
| 5935 | if (name) |
| 5936 | Perl_sv_catpvf(aTHX_ msg, " sub %"SVf, SVfARG(name)); |
| 5937 | if (SvPOK(cv)) |
| 5938 | Perl_sv_catpvf(aTHX_ msg, " (%"SVf")", SVfARG(cv)); |
| 5939 | else |
| 5940 | sv_catpvs(msg, ": none"); |
| 5941 | sv_catpvs(msg, " vs "); |
| 5942 | if (p) |
| 5943 | Perl_sv_catpvf(aTHX_ msg, "(%.*s)", (int) len, p); |
| 5944 | else |
| 5945 | sv_catpvs(msg, "none"); |
| 5946 | Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE), "%"SVf, SVfARG(msg)); |
| 5947 | } |
| 5948 | } |
| 5949 | |
| 5950 | static void const_sv_xsub(pTHX_ CV* cv); |
| 5951 | |
| 5952 | /* |
| 5953 | |
| 5954 | =head1 Optree Manipulation Functions |
| 5955 | |
| 5956 | =for apidoc cv_const_sv |
| 5957 | |
| 5958 | If C<cv> is a constant sub eligible for inlining. returns the constant |
| 5959 | value returned by the sub. Otherwise, returns NULL. |
| 5960 | |
| 5961 | Constant subs can be created with C<newCONSTSUB> or as described in |
| 5962 | L<perlsub/"Constant Functions">. |
| 5963 | |
| 5964 | =cut |
| 5965 | */ |
| 5966 | SV * |
| 5967 | Perl_cv_const_sv(pTHX_ const CV *const cv) |
| 5968 | { |
| 5969 | PERL_UNUSED_CONTEXT; |
| 5970 | if (!cv) |
| 5971 | return NULL; |
| 5972 | if (!(SvTYPE(cv) == SVt_PVCV || SvTYPE(cv) == SVt_PVFM)) |
| 5973 | return NULL; |
| 5974 | return CvCONST(cv) ? MUTABLE_SV(CvXSUBANY(cv).any_ptr) : NULL; |
| 5975 | } |
| 5976 | |
| 5977 | /* op_const_sv: examine an optree to determine whether it's in-lineable. |
| 5978 | * Can be called in 3 ways: |
| 5979 | * |
| 5980 | * !cv |
| 5981 | * look for a single OP_CONST with attached value: return the value |
| 5982 | * |
| 5983 | * cv && CvCLONE(cv) && !CvCONST(cv) |
| 5984 | * |
| 5985 | * examine the clone prototype, and if contains only a single |
| 5986 | * OP_CONST referencing a pad const, or a single PADSV referencing |
| 5987 | * an outer lexical, return a non-zero value to indicate the CV is |
| 5988 | * a candidate for "constizing" at clone time |
| 5989 | * |
| 5990 | * cv && CvCONST(cv) |
| 5991 | * |
| 5992 | * We have just cloned an anon prototype that was marked as a const |
| 5993 | * candidiate. Try to grab the current value, and in the case of |
| 5994 | * PADSV, ignore it if it has multiple references. Return the value. |
| 5995 | */ |
| 5996 | |
| 5997 | SV * |
| 5998 | Perl_op_const_sv(pTHX_ const OP *o, CV *cv) |
| 5999 | { |
| 6000 | dVAR; |
| 6001 | SV *sv = NULL; |
| 6002 | |
| 6003 | if (PL_madskills) |
| 6004 | return NULL; |
| 6005 | |
| 6006 | if (!o) |
| 6007 | return NULL; |
| 6008 | |
| 6009 | if (o->op_type == OP_LINESEQ && cLISTOPo->op_first) |
| 6010 | o = cLISTOPo->op_first->op_sibling; |
| 6011 | |
| 6012 | for (; o; o = o->op_next) { |
| 6013 | const OPCODE type = o->op_type; |
| 6014 | |
| 6015 | if (sv && o->op_next == o) |
| 6016 | return sv; |
| 6017 | if (o->op_next != o) { |
| 6018 | if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK) |
| 6019 | continue; |
| 6020 | if (type == OP_DBSTATE) |
| 6021 | continue; |
| 6022 | } |
| 6023 | if (type == OP_LEAVESUB || type == OP_RETURN) |
| 6024 | break; |
| 6025 | if (sv) |
| 6026 | return NULL; |
| 6027 | if (type == OP_CONST && cSVOPo->op_sv) |
| 6028 | sv = cSVOPo->op_sv; |
| 6029 | else if (cv && type == OP_CONST) { |
| 6030 | sv = PAD_BASE_SV(CvPADLIST(cv), o->op_targ); |
| 6031 | if (!sv) |
| 6032 | return NULL; |
| 6033 | } |
| 6034 | else if (cv && type == OP_PADSV) { |
| 6035 | if (CvCONST(cv)) { /* newly cloned anon */ |
| 6036 | sv = PAD_BASE_SV(CvPADLIST(cv), o->op_targ); |
| 6037 | /* the candidate should have 1 ref from this pad and 1 ref |
| 6038 | * from the parent */ |
| 6039 | if (!sv || SvREFCNT(sv) != 2) |
| 6040 | return NULL; |
| 6041 | sv = newSVsv(sv); |
| 6042 | SvREADONLY_on(sv); |
| 6043 | return sv; |
| 6044 | } |
| 6045 | else { |
| 6046 | if (PAD_COMPNAME_FLAGS(o->op_targ) & SVf_FAKE) |
| 6047 | sv = &PL_sv_undef; /* an arbitrary non-null value */ |
| 6048 | } |
| 6049 | } |
| 6050 | else { |
| 6051 | return NULL; |
| 6052 | } |
| 6053 | } |
| 6054 | return sv; |
| 6055 | } |
| 6056 | |
| 6057 | #ifdef PERL_MAD |
| 6058 | OP * |
| 6059 | #else |
| 6060 | void |
| 6061 | #endif |
| 6062 | Perl_newMYSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) |
| 6063 | { |
| 6064 | #if 0 |
| 6065 | /* This would be the return value, but the return cannot be reached. */ |
| 6066 | OP* pegop = newOP(OP_NULL, 0); |
| 6067 | #endif |
| 6068 | |
| 6069 | PERL_UNUSED_ARG(floor); |
| 6070 | |
| 6071 | if (o) |
| 6072 | SAVEFREEOP(o); |
| 6073 | if (proto) |
| 6074 | SAVEFREEOP(proto); |
| 6075 | if (attrs) |
| 6076 | SAVEFREEOP(attrs); |
| 6077 | if (block) |
| 6078 | SAVEFREEOP(block); |
| 6079 | Perl_croak(aTHX_ "\"my sub\" not yet implemented"); |
| 6080 | #ifdef PERL_MAD |
| 6081 | NORETURN_FUNCTION_END; |
| 6082 | #endif |
| 6083 | } |
| 6084 | |
| 6085 | CV * |
| 6086 | Perl_newSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *block) |
| 6087 | { |
| 6088 | return Perl_newATTRSUB(aTHX_ floor, o, proto, NULL, block); |
| 6089 | } |
| 6090 | |
| 6091 | CV * |
| 6092 | Perl_newATTRSUB(pTHX_ I32 floor, OP *o, OP *proto, OP *attrs, OP *block) |
| 6093 | { |
| 6094 | dVAR; |
| 6095 | GV *gv; |
| 6096 | const char *ps; |
| 6097 | STRLEN ps_len = 0; /* init it to avoid false uninit warning from icc */ |
| 6098 | register CV *cv = NULL; |
| 6099 | SV *const_sv; |
| 6100 | /* If the subroutine has no body, no attributes, and no builtin attributes |
| 6101 | then it's just a sub declaration, and we may be able to get away with |
| 6102 | storing with a placeholder scalar in the symbol table, rather than a |
| 6103 | full GV and CV. If anything is present then it will take a full CV to |
| 6104 | store it. */ |
| 6105 | const I32 gv_fetch_flags |
| 6106 | = (block || attrs || (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS) |
| 6107 | || PL_madskills) |
| 6108 | ? GV_ADDMULTI : GV_ADDMULTI | GV_NOINIT; |
| 6109 | const char * const name = o ? SvPV_nolen_const(cSVOPo->op_sv) : NULL; |
| 6110 | bool has_name; |
| 6111 | |
| 6112 | if (proto) { |
| 6113 | assert(proto->op_type == OP_CONST); |
| 6114 | ps = SvPV_const(((SVOP*)proto)->op_sv, ps_len); |
| 6115 | } |
| 6116 | else |
| 6117 | ps = NULL; |
| 6118 | |
| 6119 | if (name) { |
| 6120 | gv = gv_fetchsv(cSVOPo->op_sv, gv_fetch_flags, SVt_PVCV); |
| 6121 | has_name = TRUE; |
| 6122 | } else if (PERLDB_NAMEANON && CopLINE(PL_curcop)) { |
| 6123 | SV * const sv = sv_newmortal(); |
| 6124 | Perl_sv_setpvf(aTHX_ sv, "%s[%s:%"IVdf"]", |
| 6125 | PL_curstash ? "__ANON__" : "__ANON__::__ANON__", |
| 6126 | CopFILE(PL_curcop), (IV)CopLINE(PL_curcop)); |
| 6127 | gv = gv_fetchsv(sv, gv_fetch_flags, SVt_PVCV); |
| 6128 | has_name = TRUE; |
| 6129 | } else if (PL_curstash) { |
| 6130 | gv = gv_fetchpvs("__ANON__", gv_fetch_flags, SVt_PVCV); |
| 6131 | has_name = FALSE; |
| 6132 | } else { |
| 6133 | gv = gv_fetchpvs("__ANON__::__ANON__", gv_fetch_flags, SVt_PVCV); |
| 6134 | has_name = FALSE; |
| 6135 | } |
| 6136 | |
| 6137 | if (!PL_madskills) { |
| 6138 | if (o) |
| 6139 | SAVEFREEOP(o); |
| 6140 | if (proto) |
| 6141 | SAVEFREEOP(proto); |
| 6142 | if (attrs) |
| 6143 | SAVEFREEOP(attrs); |
| 6144 | } |
| 6145 | |
| 6146 | if (SvTYPE(gv) != SVt_PVGV) { /* Maybe prototype now, and had at |
| 6147 | maximum a prototype before. */ |
| 6148 | if (SvTYPE(gv) > SVt_NULL) { |
| 6149 | if (!SvPOK((const SV *)gv) |
| 6150 | && !(SvIOK((const SV *)gv) && SvIVX((const SV *)gv) == -1)) |
| 6151 | { |
| 6152 | Perl_ck_warner_d(aTHX_ packWARN(WARN_PROTOTYPE), "Runaway prototype"); |
| 6153 | } |
| 6154 | cv_ckproto_len((const CV *)gv, NULL, ps, ps_len); |
| 6155 | } |
| 6156 | if (ps) |
| 6157 | sv_setpvn(MUTABLE_SV(gv), ps, ps_len); |
| 6158 | else |
| 6159 | sv_setiv(MUTABLE_SV(gv), -1); |
| 6160 | |
| 6161 | SvREFCNT_dec(PL_compcv); |
| 6162 | cv = PL_compcv = NULL; |
| 6163 | goto done; |
| 6164 | } |
| 6165 | |
| 6166 | cv = (!name || GvCVGEN(gv)) ? NULL : GvCV(gv); |
| 6167 | |
| 6168 | if (!block || !ps || *ps || attrs |
| 6169 | || (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS) |
| 6170 | #ifdef PERL_MAD |
| 6171 | || block->op_type == OP_NULL |
| 6172 | #endif |
| 6173 | ) |
| 6174 | const_sv = NULL; |
| 6175 | else |
| 6176 | const_sv = op_const_sv(block, NULL); |
| 6177 | |
| 6178 | if (cv) { |
| 6179 | const bool exists = CvROOT(cv) || CvXSUB(cv); |
| 6180 | |
| 6181 | /* if the subroutine doesn't exist and wasn't pre-declared |
| 6182 | * with a prototype, assume it will be AUTOLOADed, |
| 6183 | * skipping the prototype check |
| 6184 | */ |
| 6185 | if (exists || SvPOK(cv)) |
| 6186 | cv_ckproto_len(cv, gv, ps, ps_len); |
| 6187 | /* already defined (or promised)? */ |
| 6188 | if (exists || GvASSUMECV(gv)) { |
| 6189 | if ((!block |
| 6190 | #ifdef PERL_MAD |
| 6191 | || block->op_type == OP_NULL |
| 6192 | #endif |
| 6193 | )&& !attrs) { |
| 6194 | if (CvFLAGS(PL_compcv)) { |
| 6195 | /* might have had built-in attrs applied */ |
| 6196 | if (CvLVALUE(PL_compcv) && ! CvLVALUE(cv) && ckWARN(WARN_MISC)) |
| 6197 | Perl_warner(aTHX_ packWARN(WARN_MISC), "lvalue attribute ignored after the subroutine has been defined"); |
| 6198 | CvFLAGS(cv) |= (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS & ~CVf_LVALUE); |
| 6199 | } |
| 6200 | /* just a "sub foo;" when &foo is already defined */ |
| 6201 | SAVEFREESV(PL_compcv); |
| 6202 | goto done; |
| 6203 | } |
| 6204 | if (block |
| 6205 | #ifdef PERL_MAD |
| 6206 | && block->op_type != OP_NULL |
| 6207 | #endif |
| 6208 | ) { |
| 6209 | if (ckWARN(WARN_REDEFINE) |
| 6210 | || (CvCONST(cv) |
| 6211 | && (!const_sv || sv_cmp(cv_const_sv(cv), const_sv)))) |
| 6212 | { |
| 6213 | const line_t oldline = CopLINE(PL_curcop); |
| 6214 | if (PL_parser && PL_parser->copline != NOLINE) |
| 6215 | CopLINE_set(PL_curcop, PL_parser->copline); |
| 6216 | Perl_warner(aTHX_ packWARN(WARN_REDEFINE), |
| 6217 | CvCONST(cv) ? "Constant subroutine %s redefined" |
| 6218 | : "Subroutine %s redefined", name); |
| 6219 | CopLINE_set(PL_curcop, oldline); |
| 6220 | } |
| 6221 | #ifdef PERL_MAD |
| 6222 | if (!PL_minus_c) /* keep old one around for madskills */ |
| 6223 | #endif |
| 6224 | { |
| 6225 | /* (PL_madskills unset in used file.) */ |
| 6226 | SvREFCNT_dec(cv); |
| 6227 | } |
| 6228 | cv = NULL; |
| 6229 | } |
| 6230 | } |
| 6231 | } |
| 6232 | if (const_sv) { |
| 6233 | SvREFCNT_inc_simple_void_NN(const_sv); |
| 6234 | if (cv) { |
| 6235 | assert(!CvROOT(cv) && !CvCONST(cv)); |
| 6236 | sv_setpvs(MUTABLE_SV(cv), ""); /* prototype is "" */ |
| 6237 | CvXSUBANY(cv).any_ptr = const_sv; |
| 6238 | CvXSUB(cv) = const_sv_xsub; |
| 6239 | CvCONST_on(cv); |
| 6240 | CvISXSUB_on(cv); |
| 6241 | } |
| 6242 | else { |
| 6243 | GvCV(gv) = NULL; |
| 6244 | cv = newCONSTSUB(NULL, name, const_sv); |
| 6245 | } |
| 6246 | mro_method_changed_in( /* sub Foo::Bar () { 123 } */ |
| 6247 | (CvGV(cv) && GvSTASH(CvGV(cv))) |
| 6248 | ? GvSTASH(CvGV(cv)) |
| 6249 | : CvSTASH(cv) |
| 6250 | ? CvSTASH(cv) |
| 6251 | : PL_curstash |
| 6252 | ); |
| 6253 | if (PL_madskills) |
| 6254 | goto install_block; |
| 6255 | op_free(block); |
| 6256 | SvREFCNT_dec(PL_compcv); |
| 6257 | PL_compcv = NULL; |
| 6258 | goto done; |
| 6259 | } |
| 6260 | if (cv) { /* must reuse cv if autoloaded */ |
| 6261 | /* transfer PL_compcv to cv */ |
| 6262 | if (block |
| 6263 | #ifdef PERL_MAD |
| 6264 | && block->op_type != OP_NULL |
| 6265 | #endif |
| 6266 | ) { |
| 6267 | cv_flags_t existing_builtin_attrs = CvFLAGS(cv) & CVf_BUILTIN_ATTRS; |
| 6268 | cv_undef(cv); |
| 6269 | CvFLAGS(cv) = CvFLAGS(PL_compcv) | existing_builtin_attrs; |
| 6270 | if (!CvWEAKOUTSIDE(cv)) |
| 6271 | SvREFCNT_dec(CvOUTSIDE(cv)); |
| 6272 | CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv); |
| 6273 | CvOUTSIDE_SEQ(cv) = CvOUTSIDE_SEQ(PL_compcv); |
| 6274 | CvOUTSIDE(PL_compcv) = 0; |
| 6275 | CvPADLIST(cv) = CvPADLIST(PL_compcv); |
| 6276 | CvPADLIST(PL_compcv) = 0; |
| 6277 | /* inner references to PL_compcv must be fixed up ... */ |
| 6278 | pad_fixup_inner_anons(CvPADLIST(cv), PL_compcv, cv); |
| 6279 | if (PERLDB_INTER)/* Advice debugger on the new sub. */ |
| 6280 | ++PL_sub_generation; |
| 6281 | if (CvSTASH(cv)) |
| 6282 | sv_del_backref(MUTABLE_SV(CvSTASH(cv)), MUTABLE_SV(cv)); |
| 6283 | } |
| 6284 | else { |
| 6285 | /* Might have had built-in attributes applied -- propagate them. */ |
| 6286 | CvFLAGS(cv) |= (CvFLAGS(PL_compcv) & CVf_BUILTIN_ATTRS); |
| 6287 | } |
| 6288 | /* ... before we throw it away */ |
| 6289 | SvREFCNT_dec(PL_compcv); |
| 6290 | PL_compcv = cv; |
| 6291 | } |
| 6292 | else { |
| 6293 | cv = PL_compcv; |
| 6294 | if (name) { |
| 6295 | GvCV(gv) = cv; |
| 6296 | if (PL_madskills) { |
| 6297 | if (strEQ(name, "import")) { |
| 6298 | PL_formfeed = MUTABLE_SV(cv); |
| 6299 | /* diag_listed_as: SKIPME */ |
| 6300 | Perl_warner(aTHX_ packWARN(WARN_VOID), "0x%"UVxf"\n", PTR2UV(cv)); |
| 6301 | } |
| 6302 | } |
| 6303 | GvCVGEN(gv) = 0; |
| 6304 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar { (shift)+1 } */ |
| 6305 | } |
| 6306 | } |
| 6307 | if (!CvGV(cv)) { |
| 6308 | CvGV_set(cv, gv); |
| 6309 | CvFILE_set_from_cop(cv, PL_curcop); |
| 6310 | CvSTASH(cv) = PL_curstash; |
| 6311 | if (PL_curstash) |
| 6312 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(PL_curstash), MUTABLE_SV(cv)); |
| 6313 | } |
| 6314 | if (attrs) { |
| 6315 | /* Need to do a C<use attributes $stash_of_cv,\&cv,@attrs>. */ |
| 6316 | HV *stash = name && GvSTASH(CvGV(cv)) ? GvSTASH(CvGV(cv)) : PL_curstash; |
| 6317 | apply_attrs(stash, MUTABLE_SV(cv), attrs, FALSE); |
| 6318 | } |
| 6319 | |
| 6320 | if (ps) |
| 6321 | sv_setpvn(MUTABLE_SV(cv), ps, ps_len); |
| 6322 | |
| 6323 | if (PL_parser && PL_parser->error_count) { |
| 6324 | op_free(block); |
| 6325 | block = NULL; |
| 6326 | if (name) { |
| 6327 | const char *s = strrchr(name, ':'); |
| 6328 | s = s ? s+1 : name; |
| 6329 | if (strEQ(s, "BEGIN")) { |
| 6330 | const char not_safe[] = |
| 6331 | "BEGIN not safe after errors--compilation aborted"; |
| 6332 | if (PL_in_eval & EVAL_KEEPERR) |
| 6333 | Perl_croak(aTHX_ not_safe); |
| 6334 | else { |
| 6335 | /* force display of errors found but not reported */ |
| 6336 | sv_catpv(ERRSV, not_safe); |
| 6337 | Perl_croak(aTHX_ "%"SVf, SVfARG(ERRSV)); |
| 6338 | } |
| 6339 | } |
| 6340 | } |
| 6341 | } |
| 6342 | install_block: |
| 6343 | if (!block) |
| 6344 | goto done; |
| 6345 | |
| 6346 | /* If we assign an optree to a PVCV, then we've defined a subroutine that |
| 6347 | the debugger could be able to set a breakpoint in, so signal to |
| 6348 | pp_entereval that it should not throw away any saved lines at scope |
| 6349 | exit. */ |
| 6350 | |
| 6351 | PL_breakable_sub_gen++; |
| 6352 | if (CvLVALUE(cv)) { |
| 6353 | CvROOT(cv) = newUNOP(OP_LEAVESUBLV, 0, |
| 6354 | mod(scalarseq(block), OP_LEAVESUBLV)); |
| 6355 | block->op_attached = 1; |
| 6356 | } |
| 6357 | else { |
| 6358 | /* This makes sub {}; work as expected. */ |
| 6359 | if (block->op_type == OP_STUB) { |
| 6360 | OP* const newblock = newSTATEOP(0, NULL, 0); |
| 6361 | #ifdef PERL_MAD |
| 6362 | op_getmad(block,newblock,'B'); |
| 6363 | #else |
| 6364 | op_free(block); |
| 6365 | #endif |
| 6366 | block = newblock; |
| 6367 | } |
| 6368 | else |
| 6369 | block->op_attached = 1; |
| 6370 | CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block)); |
| 6371 | } |
| 6372 | CvROOT(cv)->op_private |= OPpREFCOUNTED; |
| 6373 | OpREFCNT_set(CvROOT(cv), 1); |
| 6374 | CvSTART(cv) = LINKLIST(CvROOT(cv)); |
| 6375 | CvROOT(cv)->op_next = 0; |
| 6376 | CALL_PEEP(CvSTART(cv)); |
| 6377 | |
| 6378 | /* now that optimizer has done its work, adjust pad values */ |
| 6379 | |
| 6380 | pad_tidy(CvCLONE(cv) ? padtidy_SUBCLONE : padtidy_SUB); |
| 6381 | |
| 6382 | if (CvCLONE(cv)) { |
| 6383 | assert(!CvCONST(cv)); |
| 6384 | if (ps && !*ps && op_const_sv(block, cv)) |
| 6385 | CvCONST_on(cv); |
| 6386 | } |
| 6387 | |
| 6388 | if (has_name) { |
| 6389 | if (PERLDB_SUBLINE && PL_curstash != PL_debstash) { |
| 6390 | SV * const tmpstr = sv_newmortal(); |
| 6391 | GV * const db_postponed = gv_fetchpvs("DB::postponed", |
| 6392 | GV_ADDMULTI, SVt_PVHV); |
| 6393 | HV *hv; |
| 6394 | SV * const sv = Perl_newSVpvf(aTHX_ "%s:%ld-%ld", |
| 6395 | CopFILE(PL_curcop), |
| 6396 | (long)PL_subline, |
| 6397 | (long)CopLINE(PL_curcop)); |
| 6398 | gv_efullname3(tmpstr, gv, NULL); |
| 6399 | (void)hv_store(GvHV(PL_DBsub), SvPVX_const(tmpstr), |
| 6400 | SvCUR(tmpstr), sv, 0); |
| 6401 | hv = GvHVn(db_postponed); |
| 6402 | if (HvTOTALKEYS(hv) > 0 && hv_exists(hv, SvPVX_const(tmpstr), SvCUR(tmpstr))) { |
| 6403 | CV * const pcv = GvCV(db_postponed); |
| 6404 | if (pcv) { |
| 6405 | dSP; |
| 6406 | PUSHMARK(SP); |
| 6407 | XPUSHs(tmpstr); |
| 6408 | PUTBACK; |
| 6409 | call_sv(MUTABLE_SV(pcv), G_DISCARD); |
| 6410 | } |
| 6411 | } |
| 6412 | } |
| 6413 | |
| 6414 | if (name && ! (PL_parser && PL_parser->error_count)) |
| 6415 | process_special_blocks(name, gv, cv); |
| 6416 | } |
| 6417 | |
| 6418 | done: |
| 6419 | if (PL_parser) |
| 6420 | PL_parser->copline = NOLINE; |
| 6421 | LEAVE_SCOPE(floor); |
| 6422 | return cv; |
| 6423 | } |
| 6424 | |
| 6425 | STATIC void |
| 6426 | S_process_special_blocks(pTHX_ const char *const fullname, GV *const gv, |
| 6427 | CV *const cv) |
| 6428 | { |
| 6429 | const char *const colon = strrchr(fullname,':'); |
| 6430 | const char *const name = colon ? colon + 1 : fullname; |
| 6431 | |
| 6432 | PERL_ARGS_ASSERT_PROCESS_SPECIAL_BLOCKS; |
| 6433 | |
| 6434 | if (*name == 'B') { |
| 6435 | if (strEQ(name, "BEGIN")) { |
| 6436 | const I32 oldscope = PL_scopestack_ix; |
| 6437 | ENTER; |
| 6438 | SAVECOPFILE(&PL_compiling); |
| 6439 | SAVECOPLINE(&PL_compiling); |
| 6440 | |
| 6441 | DEBUG_x( dump_sub(gv) ); |
| 6442 | Perl_av_create_and_push(aTHX_ &PL_beginav, MUTABLE_SV(cv)); |
| 6443 | GvCV(gv) = 0; /* cv has been hijacked */ |
| 6444 | call_list(oldscope, PL_beginav); |
| 6445 | |
| 6446 | PL_curcop = &PL_compiling; |
| 6447 | CopHINTS_set(&PL_compiling, PL_hints); |
| 6448 | LEAVE; |
| 6449 | } |
| 6450 | else |
| 6451 | return; |
| 6452 | } else { |
| 6453 | if (*name == 'E') { |
| 6454 | if strEQ(name, "END") { |
| 6455 | DEBUG_x( dump_sub(gv) ); |
| 6456 | Perl_av_create_and_unshift_one(aTHX_ &PL_endav, MUTABLE_SV(cv)); |
| 6457 | } else |
| 6458 | return; |
| 6459 | } else if (*name == 'U') { |
| 6460 | if (strEQ(name, "UNITCHECK")) { |
| 6461 | /* It's never too late to run a unitcheck block */ |
| 6462 | Perl_av_create_and_unshift_one(aTHX_ &PL_unitcheckav, MUTABLE_SV(cv)); |
| 6463 | } |
| 6464 | else |
| 6465 | return; |
| 6466 | } else if (*name == 'C') { |
| 6467 | if (strEQ(name, "CHECK")) { |
| 6468 | if (PL_main_start) |
| 6469 | Perl_ck_warner(aTHX_ packWARN(WARN_VOID), |
| 6470 | "Too late to run CHECK block"); |
| 6471 | Perl_av_create_and_unshift_one(aTHX_ &PL_checkav, MUTABLE_SV(cv)); |
| 6472 | } |
| 6473 | else |
| 6474 | return; |
| 6475 | } else if (*name == 'I') { |
| 6476 | if (strEQ(name, "INIT")) { |
| 6477 | if (PL_main_start) |
| 6478 | Perl_ck_warner(aTHX_ packWARN(WARN_VOID), |
| 6479 | "Too late to run INIT block"); |
| 6480 | Perl_av_create_and_push(aTHX_ &PL_initav, MUTABLE_SV(cv)); |
| 6481 | } |
| 6482 | else |
| 6483 | return; |
| 6484 | } else |
| 6485 | return; |
| 6486 | DEBUG_x( dump_sub(gv) ); |
| 6487 | GvCV(gv) = 0; /* cv has been hijacked */ |
| 6488 | } |
| 6489 | } |
| 6490 | |
| 6491 | /* |
| 6492 | =for apidoc newCONSTSUB |
| 6493 | |
| 6494 | Creates a constant sub equivalent to Perl C<sub FOO () { 123 }> which is |
| 6495 | eligible for inlining at compile-time. |
| 6496 | |
| 6497 | Passing NULL for SV creates a constant sub equivalent to C<sub BAR () {}>, |
| 6498 | which won't be called if used as a destructor, but will suppress the overhead |
| 6499 | of a call to C<AUTOLOAD>. (This form, however, isn't eligible for inlining at |
| 6500 | compile time.) |
| 6501 | |
| 6502 | =cut |
| 6503 | */ |
| 6504 | |
| 6505 | CV * |
| 6506 | Perl_newCONSTSUB(pTHX_ HV *stash, const char *name, SV *sv) |
| 6507 | { |
| 6508 | dVAR; |
| 6509 | CV* cv; |
| 6510 | #ifdef USE_ITHREADS |
| 6511 | const char *const file = CopFILE(PL_curcop); |
| 6512 | #else |
| 6513 | SV *const temp_sv = CopFILESV(PL_curcop); |
| 6514 | const char *const file = temp_sv ? SvPV_nolen_const(temp_sv) : NULL; |
| 6515 | #endif |
| 6516 | |
| 6517 | ENTER; |
| 6518 | |
| 6519 | if (IN_PERL_RUNTIME) { |
| 6520 | /* at runtime, it's not safe to manipulate PL_curcop: it may be |
| 6521 | * an op shared between threads. Use a non-shared COP for our |
| 6522 | * dirty work */ |
| 6523 | SAVEVPTR(PL_curcop); |
| 6524 | PL_curcop = &PL_compiling; |
| 6525 | } |
| 6526 | SAVECOPLINE(PL_curcop); |
| 6527 | CopLINE_set(PL_curcop, PL_parser ? PL_parser->copline : NOLINE); |
| 6528 | |
| 6529 | SAVEHINTS(); |
| 6530 | PL_hints &= ~HINT_BLOCK_SCOPE; |
| 6531 | |
| 6532 | if (stash) { |
| 6533 | SAVESPTR(PL_curstash); |
| 6534 | SAVECOPSTASH(PL_curcop); |
| 6535 | PL_curstash = stash; |
| 6536 | CopSTASH_set(PL_curcop,stash); |
| 6537 | } |
| 6538 | |
| 6539 | /* file becomes the CvFILE. For an XS, it's supposed to be static storage, |
| 6540 | and so doesn't get free()d. (It's expected to be from the C pre- |
| 6541 | processor __FILE__ directive). But we need a dynamically allocated one, |
| 6542 | and we need it to get freed. */ |
| 6543 | cv = newXS_flags(name, const_sv_xsub, file ? file : "", "", |
| 6544 | XS_DYNAMIC_FILENAME); |
| 6545 | CvXSUBANY(cv).any_ptr = sv; |
| 6546 | CvCONST_on(cv); |
| 6547 | |
| 6548 | #ifdef USE_ITHREADS |
| 6549 | if (stash) |
| 6550 | CopSTASH_free(PL_curcop); |
| 6551 | #endif |
| 6552 | LEAVE; |
| 6553 | |
| 6554 | return cv; |
| 6555 | } |
| 6556 | |
| 6557 | CV * |
| 6558 | Perl_newXS_flags(pTHX_ const char *name, XSUBADDR_t subaddr, |
| 6559 | const char *const filename, const char *const proto, |
| 6560 | U32 flags) |
| 6561 | { |
| 6562 | CV *cv = newXS(name, subaddr, filename); |
| 6563 | |
| 6564 | PERL_ARGS_ASSERT_NEWXS_FLAGS; |
| 6565 | |
| 6566 | if (flags & XS_DYNAMIC_FILENAME) { |
| 6567 | /* We need to "make arrangements" (ie cheat) to ensure that the |
| 6568 | filename lasts as long as the PVCV we just created, but also doesn't |
| 6569 | leak */ |
| 6570 | STRLEN filename_len = strlen(filename); |
| 6571 | STRLEN proto_and_file_len = filename_len; |
| 6572 | char *proto_and_file; |
| 6573 | STRLEN proto_len; |
| 6574 | |
| 6575 | if (proto) { |
| 6576 | proto_len = strlen(proto); |
| 6577 | proto_and_file_len += proto_len; |
| 6578 | |
| 6579 | Newx(proto_and_file, proto_and_file_len + 1, char); |
| 6580 | Copy(proto, proto_and_file, proto_len, char); |
| 6581 | Copy(filename, proto_and_file + proto_len, filename_len + 1, char); |
| 6582 | } else { |
| 6583 | proto_len = 0; |
| 6584 | proto_and_file = savepvn(filename, filename_len); |
| 6585 | } |
| 6586 | |
| 6587 | /* This gets free()d. :-) */ |
| 6588 | sv_usepvn_flags(MUTABLE_SV(cv), proto_and_file, proto_and_file_len, |
| 6589 | SV_HAS_TRAILING_NUL); |
| 6590 | if (proto) { |
| 6591 | /* This gives us the correct prototype, rather than one with the |
| 6592 | file name appended. */ |
| 6593 | SvCUR_set(cv, proto_len); |
| 6594 | } else { |
| 6595 | SvPOK_off(cv); |
| 6596 | } |
| 6597 | CvFILE(cv) = proto_and_file + proto_len; |
| 6598 | } else { |
| 6599 | sv_setpv(MUTABLE_SV(cv), proto); |
| 6600 | } |
| 6601 | return cv; |
| 6602 | } |
| 6603 | |
| 6604 | /* |
| 6605 | =for apidoc U||newXS |
| 6606 | |
| 6607 | Used by C<xsubpp> to hook up XSUBs as Perl subs. I<filename> needs to be |
| 6608 | static storage, as it is used directly as CvFILE(), without a copy being made. |
| 6609 | |
| 6610 | =cut |
| 6611 | */ |
| 6612 | |
| 6613 | CV * |
| 6614 | Perl_newXS(pTHX_ const char *name, XSUBADDR_t subaddr, const char *filename) |
| 6615 | { |
| 6616 | dVAR; |
| 6617 | GV * const gv = gv_fetchpv(name ? name : |
| 6618 | (PL_curstash ? "__ANON__" : "__ANON__::__ANON__"), |
| 6619 | GV_ADDMULTI, SVt_PVCV); |
| 6620 | register CV *cv; |
| 6621 | |
| 6622 | PERL_ARGS_ASSERT_NEWXS; |
| 6623 | |
| 6624 | if (!subaddr) |
| 6625 | Perl_croak(aTHX_ "panic: no address for '%s' in '%s'", name, filename); |
| 6626 | |
| 6627 | if ((cv = (name ? GvCV(gv) : NULL))) { |
| 6628 | if (GvCVGEN(gv)) { |
| 6629 | /* just a cached method */ |
| 6630 | SvREFCNT_dec(cv); |
| 6631 | cv = NULL; |
| 6632 | } |
| 6633 | else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) { |
| 6634 | /* already defined (or promised) */ |
| 6635 | /* XXX It's possible for this HvNAME_get to return null, and get passed into strEQ */ |
| 6636 | if (ckWARN(WARN_REDEFINE)) { |
| 6637 | GV * const gvcv = CvGV(cv); |
| 6638 | if (gvcv) { |
| 6639 | HV * const stash = GvSTASH(gvcv); |
| 6640 | if (stash) { |
| 6641 | const char *redefined_name = HvNAME_get(stash); |
| 6642 | if ( strEQ(redefined_name,"autouse") ) { |
| 6643 | const line_t oldline = CopLINE(PL_curcop); |
| 6644 | if (PL_parser && PL_parser->copline != NOLINE) |
| 6645 | CopLINE_set(PL_curcop, PL_parser->copline); |
| 6646 | Perl_warner(aTHX_ packWARN(WARN_REDEFINE), |
| 6647 | CvCONST(cv) ? "Constant subroutine %s redefined" |
| 6648 | : "Subroutine %s redefined" |
| 6649 | ,name); |
| 6650 | CopLINE_set(PL_curcop, oldline); |
| 6651 | } |
| 6652 | } |
| 6653 | } |
| 6654 | } |
| 6655 | SvREFCNT_dec(cv); |
| 6656 | cv = NULL; |
| 6657 | } |
| 6658 | } |
| 6659 | |
| 6660 | if (cv) /* must reuse cv if autoloaded */ |
| 6661 | cv_undef(cv); |
| 6662 | else { |
| 6663 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); |
| 6664 | if (name) { |
| 6665 | GvCV(gv) = cv; |
| 6666 | GvCVGEN(gv) = 0; |
| 6667 | mro_method_changed_in(GvSTASH(gv)); /* newXS */ |
| 6668 | } |
| 6669 | } |
| 6670 | if (!name) |
| 6671 | CvANON_on(cv); |
| 6672 | CvGV_set(cv, gv); |
| 6673 | (void)gv_fetchfile(filename); |
| 6674 | CvFILE(cv) = (char *)filename; /* NOTE: not copied, as it is expected to be |
| 6675 | an external constant string */ |
| 6676 | CvISXSUB_on(cv); |
| 6677 | CvXSUB(cv) = subaddr; |
| 6678 | |
| 6679 | if (name) |
| 6680 | process_special_blocks(name, gv, cv); |
| 6681 | |
| 6682 | return cv; |
| 6683 | } |
| 6684 | |
| 6685 | #ifdef PERL_MAD |
| 6686 | OP * |
| 6687 | #else |
| 6688 | void |
| 6689 | #endif |
| 6690 | Perl_newFORM(pTHX_ I32 floor, OP *o, OP *block) |
| 6691 | { |
| 6692 | dVAR; |
| 6693 | register CV *cv; |
| 6694 | #ifdef PERL_MAD |
| 6695 | OP* pegop = newOP(OP_NULL, 0); |
| 6696 | #endif |
| 6697 | |
| 6698 | GV * const gv = o |
| 6699 | ? gv_fetchsv(cSVOPo->op_sv, GV_ADD, SVt_PVFM) |
| 6700 | : gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVFM); |
| 6701 | |
| 6702 | GvMULTI_on(gv); |
| 6703 | if ((cv = GvFORM(gv))) { |
| 6704 | if (ckWARN(WARN_REDEFINE)) { |
| 6705 | const line_t oldline = CopLINE(PL_curcop); |
| 6706 | if (PL_parser && PL_parser->copline != NOLINE) |
| 6707 | CopLINE_set(PL_curcop, PL_parser->copline); |
| 6708 | if (o) { |
| 6709 | Perl_warner(aTHX_ packWARN(WARN_REDEFINE), |
| 6710 | "Format %"SVf" redefined", SVfARG(cSVOPo->op_sv)); |
| 6711 | } else { |
| 6712 | Perl_warner(aTHX_ packWARN(WARN_REDEFINE), |
| 6713 | "Format STDOUT redefined"); |
| 6714 | } |
| 6715 | CopLINE_set(PL_curcop, oldline); |
| 6716 | } |
| 6717 | SvREFCNT_dec(cv); |
| 6718 | } |
| 6719 | cv = PL_compcv; |
| 6720 | GvFORM(gv) = cv; |
| 6721 | CvGV_set(cv, gv); |
| 6722 | CvFILE_set_from_cop(cv, PL_curcop); |
| 6723 | |
| 6724 | |
| 6725 | pad_tidy(padtidy_FORMAT); |
| 6726 | CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block)); |
| 6727 | CvROOT(cv)->op_private |= OPpREFCOUNTED; |
| 6728 | OpREFCNT_set(CvROOT(cv), 1); |
| 6729 | CvSTART(cv) = LINKLIST(CvROOT(cv)); |
| 6730 | CvROOT(cv)->op_next = 0; |
| 6731 | CALL_PEEP(CvSTART(cv)); |
| 6732 | #ifdef PERL_MAD |
| 6733 | op_getmad(o,pegop,'n'); |
| 6734 | op_getmad_weak(block, pegop, 'b'); |
| 6735 | #else |
| 6736 | op_free(o); |
| 6737 | #endif |
| 6738 | if (PL_parser) |
| 6739 | PL_parser->copline = NOLINE; |
| 6740 | LEAVE_SCOPE(floor); |
| 6741 | #ifdef PERL_MAD |
| 6742 | return pegop; |
| 6743 | #endif |
| 6744 | } |
| 6745 | |
| 6746 | OP * |
| 6747 | Perl_newANONLIST(pTHX_ OP *o) |
| 6748 | { |
| 6749 | return convert(OP_ANONLIST, OPf_SPECIAL, o); |
| 6750 | } |
| 6751 | |
| 6752 | OP * |
| 6753 | Perl_newANONHASH(pTHX_ OP *o) |
| 6754 | { |
| 6755 | return convert(OP_ANONHASH, OPf_SPECIAL, o); |
| 6756 | } |
| 6757 | |
| 6758 | OP * |
| 6759 | Perl_newANONSUB(pTHX_ I32 floor, OP *proto, OP *block) |
| 6760 | { |
| 6761 | return newANONATTRSUB(floor, proto, NULL, block); |
| 6762 | } |
| 6763 | |
| 6764 | OP * |
| 6765 | Perl_newANONATTRSUB(pTHX_ I32 floor, OP *proto, OP *attrs, OP *block) |
| 6766 | { |
| 6767 | return newUNOP(OP_REFGEN, 0, |
| 6768 | newSVOP(OP_ANONCODE, 0, |
| 6769 | MUTABLE_SV(newATTRSUB(floor, 0, proto, attrs, block)))); |
| 6770 | } |
| 6771 | |
| 6772 | OP * |
| 6773 | Perl_oopsAV(pTHX_ OP *o) |
| 6774 | { |
| 6775 | dVAR; |
| 6776 | |
| 6777 | PERL_ARGS_ASSERT_OOPSAV; |
| 6778 | |
| 6779 | switch (o->op_type) { |
| 6780 | case OP_PADSV: |
| 6781 | o->op_type = OP_PADAV; |
| 6782 | o->op_ppaddr = PL_ppaddr[OP_PADAV]; |
| 6783 | return ref(o, OP_RV2AV); |
| 6784 | |
| 6785 | case OP_RV2SV: |
| 6786 | o->op_type = OP_RV2AV; |
| 6787 | o->op_ppaddr = PL_ppaddr[OP_RV2AV]; |
| 6788 | ref(o, OP_RV2AV); |
| 6789 | break; |
| 6790 | |
| 6791 | default: |
| 6792 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "oops: oopsAV"); |
| 6793 | break; |
| 6794 | } |
| 6795 | return o; |
| 6796 | } |
| 6797 | |
| 6798 | OP * |
| 6799 | Perl_oopsHV(pTHX_ OP *o) |
| 6800 | { |
| 6801 | dVAR; |
| 6802 | |
| 6803 | PERL_ARGS_ASSERT_OOPSHV; |
| 6804 | |
| 6805 | switch (o->op_type) { |
| 6806 | case OP_PADSV: |
| 6807 | case OP_PADAV: |
| 6808 | o->op_type = OP_PADHV; |
| 6809 | o->op_ppaddr = PL_ppaddr[OP_PADHV]; |
| 6810 | return ref(o, OP_RV2HV); |
| 6811 | |
| 6812 | case OP_RV2SV: |
| 6813 | case OP_RV2AV: |
| 6814 | o->op_type = OP_RV2HV; |
| 6815 | o->op_ppaddr = PL_ppaddr[OP_RV2HV]; |
| 6816 | ref(o, OP_RV2HV); |
| 6817 | break; |
| 6818 | |
| 6819 | default: |
| 6820 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "oops: oopsHV"); |
| 6821 | break; |
| 6822 | } |
| 6823 | return o; |
| 6824 | } |
| 6825 | |
| 6826 | OP * |
| 6827 | Perl_newAVREF(pTHX_ OP *o) |
| 6828 | { |
| 6829 | dVAR; |
| 6830 | |
| 6831 | PERL_ARGS_ASSERT_NEWAVREF; |
| 6832 | |
| 6833 | if (o->op_type == OP_PADANY) { |
| 6834 | o->op_type = OP_PADAV; |
| 6835 | o->op_ppaddr = PL_ppaddr[OP_PADAV]; |
| 6836 | return o; |
| 6837 | } |
| 6838 | else if ((o->op_type == OP_RV2AV || o->op_type == OP_PADAV)) { |
| 6839 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 6840 | "Using an array as a reference is deprecated"); |
| 6841 | } |
| 6842 | return newUNOP(OP_RV2AV, 0, scalar(o)); |
| 6843 | } |
| 6844 | |
| 6845 | OP * |
| 6846 | Perl_newGVREF(pTHX_ I32 type, OP *o) |
| 6847 | { |
| 6848 | if (type == OP_MAPSTART || type == OP_GREPSTART || type == OP_SORT) |
| 6849 | return newUNOP(OP_NULL, 0, o); |
| 6850 | return ref(newUNOP(OP_RV2GV, OPf_REF, o), type); |
| 6851 | } |
| 6852 | |
| 6853 | OP * |
| 6854 | Perl_newHVREF(pTHX_ OP *o) |
| 6855 | { |
| 6856 | dVAR; |
| 6857 | |
| 6858 | PERL_ARGS_ASSERT_NEWHVREF; |
| 6859 | |
| 6860 | if (o->op_type == OP_PADANY) { |
| 6861 | o->op_type = OP_PADHV; |
| 6862 | o->op_ppaddr = PL_ppaddr[OP_PADHV]; |
| 6863 | return o; |
| 6864 | } |
| 6865 | else if ((o->op_type == OP_RV2HV || o->op_type == OP_PADHV)) { |
| 6866 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 6867 | "Using a hash as a reference is deprecated"); |
| 6868 | } |
| 6869 | return newUNOP(OP_RV2HV, 0, scalar(o)); |
| 6870 | } |
| 6871 | |
| 6872 | OP * |
| 6873 | Perl_newCVREF(pTHX_ I32 flags, OP *o) |
| 6874 | { |
| 6875 | return newUNOP(OP_RV2CV, flags, scalar(o)); |
| 6876 | } |
| 6877 | |
| 6878 | OP * |
| 6879 | Perl_newSVREF(pTHX_ OP *o) |
| 6880 | { |
| 6881 | dVAR; |
| 6882 | |
| 6883 | PERL_ARGS_ASSERT_NEWSVREF; |
| 6884 | |
| 6885 | if (o->op_type == OP_PADANY) { |
| 6886 | o->op_type = OP_PADSV; |
| 6887 | o->op_ppaddr = PL_ppaddr[OP_PADSV]; |
| 6888 | return o; |
| 6889 | } |
| 6890 | return newUNOP(OP_RV2SV, 0, scalar(o)); |
| 6891 | } |
| 6892 | |
| 6893 | /* Check routines. See the comments at the top of this file for details |
| 6894 | * on when these are called */ |
| 6895 | |
| 6896 | OP * |
| 6897 | Perl_ck_anoncode(pTHX_ OP *o) |
| 6898 | { |
| 6899 | PERL_ARGS_ASSERT_CK_ANONCODE; |
| 6900 | |
| 6901 | cSVOPo->op_targ = pad_add_anon(cSVOPo->op_sv, o->op_type); |
| 6902 | if (!PL_madskills) |
| 6903 | cSVOPo->op_sv = NULL; |
| 6904 | return o; |
| 6905 | } |
| 6906 | |
| 6907 | OP * |
| 6908 | Perl_ck_bitop(pTHX_ OP *o) |
| 6909 | { |
| 6910 | dVAR; |
| 6911 | |
| 6912 | PERL_ARGS_ASSERT_CK_BITOP; |
| 6913 | |
| 6914 | #define OP_IS_NUMCOMPARE(op) \ |
| 6915 | ((op) == OP_LT || (op) == OP_I_LT || \ |
| 6916 | (op) == OP_GT || (op) == OP_I_GT || \ |
| 6917 | (op) == OP_LE || (op) == OP_I_LE || \ |
| 6918 | (op) == OP_GE || (op) == OP_I_GE || \ |
| 6919 | (op) == OP_EQ || (op) == OP_I_EQ || \ |
| 6920 | (op) == OP_NE || (op) == OP_I_NE || \ |
| 6921 | (op) == OP_NCMP || (op) == OP_I_NCMP) |
| 6922 | o->op_private = (U8)(PL_hints & HINT_INTEGER); |
| 6923 | if (!(o->op_flags & OPf_STACKED) /* Not an assignment */ |
| 6924 | && (o->op_type == OP_BIT_OR |
| 6925 | || o->op_type == OP_BIT_AND |
| 6926 | || o->op_type == OP_BIT_XOR)) |
| 6927 | { |
| 6928 | const OP * const left = cBINOPo->op_first; |
| 6929 | const OP * const right = left->op_sibling; |
| 6930 | if ((OP_IS_NUMCOMPARE(left->op_type) && |
| 6931 | (left->op_flags & OPf_PARENS) == 0) || |
| 6932 | (OP_IS_NUMCOMPARE(right->op_type) && |
| 6933 | (right->op_flags & OPf_PARENS) == 0)) |
| 6934 | Perl_ck_warner(aTHX_ packWARN(WARN_PRECEDENCE), |
| 6935 | "Possible precedence problem on bitwise %c operator", |
| 6936 | o->op_type == OP_BIT_OR ? '|' |
| 6937 | : o->op_type == OP_BIT_AND ? '&' : '^' |
| 6938 | ); |
| 6939 | } |
| 6940 | return o; |
| 6941 | } |
| 6942 | |
| 6943 | OP * |
| 6944 | Perl_ck_concat(pTHX_ OP *o) |
| 6945 | { |
| 6946 | const OP * const kid = cUNOPo->op_first; |
| 6947 | |
| 6948 | PERL_ARGS_ASSERT_CK_CONCAT; |
| 6949 | PERL_UNUSED_CONTEXT; |
| 6950 | |
| 6951 | if (kid->op_type == OP_CONCAT && !(kid->op_private & OPpTARGET_MY) && |
| 6952 | !(kUNOP->op_first->op_flags & OPf_MOD)) |
| 6953 | o->op_flags |= OPf_STACKED; |
| 6954 | return o; |
| 6955 | } |
| 6956 | |
| 6957 | OP * |
| 6958 | Perl_ck_spair(pTHX_ OP *o) |
| 6959 | { |
| 6960 | dVAR; |
| 6961 | |
| 6962 | PERL_ARGS_ASSERT_CK_SPAIR; |
| 6963 | |
| 6964 | if (o->op_flags & OPf_KIDS) { |
| 6965 | OP* newop; |
| 6966 | OP* kid; |
| 6967 | const OPCODE type = o->op_type; |
| 6968 | o = modkids(ck_fun(o), type); |
| 6969 | kid = cUNOPo->op_first; |
| 6970 | newop = kUNOP->op_first->op_sibling; |
| 6971 | if (newop) { |
| 6972 | const OPCODE type = newop->op_type; |
| 6973 | if (newop->op_sibling || !(PL_opargs[type] & OA_RETSCALAR) || |
| 6974 | type == OP_PADAV || type == OP_PADHV || |
| 6975 | type == OP_RV2AV || type == OP_RV2HV) |
| 6976 | return o; |
| 6977 | } |
| 6978 | #ifdef PERL_MAD |
| 6979 | op_getmad(kUNOP->op_first,newop,'K'); |
| 6980 | #else |
| 6981 | op_free(kUNOP->op_first); |
| 6982 | #endif |
| 6983 | kUNOP->op_first = newop; |
| 6984 | } |
| 6985 | o->op_ppaddr = PL_ppaddr[++o->op_type]; |
| 6986 | return ck_fun(o); |
| 6987 | } |
| 6988 | |
| 6989 | OP * |
| 6990 | Perl_ck_delete(pTHX_ OP *o) |
| 6991 | { |
| 6992 | PERL_ARGS_ASSERT_CK_DELETE; |
| 6993 | |
| 6994 | o = ck_fun(o); |
| 6995 | o->op_private = 0; |
| 6996 | if (o->op_flags & OPf_KIDS) { |
| 6997 | OP * const kid = cUNOPo->op_first; |
| 6998 | switch (kid->op_type) { |
| 6999 | case OP_ASLICE: |
| 7000 | o->op_flags |= OPf_SPECIAL; |
| 7001 | /* FALL THROUGH */ |
| 7002 | case OP_HSLICE: |
| 7003 | o->op_private |= OPpSLICE; |
| 7004 | break; |
| 7005 | case OP_AELEM: |
| 7006 | o->op_flags |= OPf_SPECIAL; |
| 7007 | /* FALL THROUGH */ |
| 7008 | case OP_HELEM: |
| 7009 | break; |
| 7010 | default: |
| 7011 | Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or slice", |
| 7012 | OP_DESC(o)); |
| 7013 | } |
| 7014 | if (kid->op_private & OPpLVAL_INTRO) |
| 7015 | o->op_private |= OPpLVAL_INTRO; |
| 7016 | op_null(kid); |
| 7017 | } |
| 7018 | return o; |
| 7019 | } |
| 7020 | |
| 7021 | OP * |
| 7022 | Perl_ck_die(pTHX_ OP *o) |
| 7023 | { |
| 7024 | PERL_ARGS_ASSERT_CK_DIE; |
| 7025 | |
| 7026 | #ifdef VMS |
| 7027 | if (VMSISH_HUSHED) o->op_private |= OPpHUSH_VMSISH; |
| 7028 | #endif |
| 7029 | return ck_fun(o); |
| 7030 | } |
| 7031 | |
| 7032 | OP * |
| 7033 | Perl_ck_eof(pTHX_ OP *o) |
| 7034 | { |
| 7035 | dVAR; |
| 7036 | |
| 7037 | PERL_ARGS_ASSERT_CK_EOF; |
| 7038 | |
| 7039 | if (o->op_flags & OPf_KIDS) { |
| 7040 | if (cLISTOPo->op_first->op_type == OP_STUB) { |
| 7041 | OP * const newop |
| 7042 | = newUNOP(o->op_type, OPf_SPECIAL, newGVOP(OP_GV, 0, PL_argvgv)); |
| 7043 | #ifdef PERL_MAD |
| 7044 | op_getmad(o,newop,'O'); |
| 7045 | #else |
| 7046 | op_free(o); |
| 7047 | #endif |
| 7048 | o = newop; |
| 7049 | } |
| 7050 | return ck_fun(o); |
| 7051 | } |
| 7052 | return o; |
| 7053 | } |
| 7054 | |
| 7055 | OP * |
| 7056 | Perl_ck_eval(pTHX_ OP *o) |
| 7057 | { |
| 7058 | dVAR; |
| 7059 | |
| 7060 | PERL_ARGS_ASSERT_CK_EVAL; |
| 7061 | |
| 7062 | PL_hints |= HINT_BLOCK_SCOPE; |
| 7063 | if (o->op_flags & OPf_KIDS) { |
| 7064 | SVOP * const kid = (SVOP*)cUNOPo->op_first; |
| 7065 | |
| 7066 | if (!kid) { |
| 7067 | o->op_flags &= ~OPf_KIDS; |
| 7068 | op_null(o); |
| 7069 | } |
| 7070 | else if (kid->op_type == OP_LINESEQ || kid->op_type == OP_STUB) { |
| 7071 | LOGOP *enter; |
| 7072 | #ifdef PERL_MAD |
| 7073 | OP* const oldo = o; |
| 7074 | #endif |
| 7075 | |
| 7076 | cUNOPo->op_first = 0; |
| 7077 | #ifndef PERL_MAD |
| 7078 | op_free(o); |
| 7079 | #endif |
| 7080 | |
| 7081 | NewOp(1101, enter, 1, LOGOP); |
| 7082 | enter->op_type = OP_ENTERTRY; |
| 7083 | enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY]; |
| 7084 | enter->op_private = 0; |
| 7085 | |
| 7086 | /* establish postfix order */ |
| 7087 | enter->op_next = (OP*)enter; |
| 7088 | |
| 7089 | o = op_prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid); |
| 7090 | o->op_type = OP_LEAVETRY; |
| 7091 | o->op_ppaddr = PL_ppaddr[OP_LEAVETRY]; |
| 7092 | enter->op_other = o; |
| 7093 | op_getmad(oldo,o,'O'); |
| 7094 | return o; |
| 7095 | } |
| 7096 | else { |
| 7097 | scalar((OP*)kid); |
| 7098 | PL_cv_has_eval = 1; |
| 7099 | } |
| 7100 | } |
| 7101 | else { |
| 7102 | #ifdef PERL_MAD |
| 7103 | OP* const oldo = o; |
| 7104 | #else |
| 7105 | op_free(o); |
| 7106 | #endif |
| 7107 | o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP()); |
| 7108 | op_getmad(oldo,o,'O'); |
| 7109 | } |
| 7110 | o->op_targ = (PADOFFSET)PL_hints; |
| 7111 | if ((PL_hints & HINT_LOCALIZE_HH) != 0 && GvHV(PL_hintgv)) { |
| 7112 | /* Store a copy of %^H that pp_entereval can pick up. */ |
| 7113 | OP *hhop = newSVOP(OP_HINTSEVAL, 0, |
| 7114 | MUTABLE_SV(hv_copy_hints_hv(GvHV(PL_hintgv)))); |
| 7115 | cUNOPo->op_first->op_sibling = hhop; |
| 7116 | o->op_private |= OPpEVAL_HAS_HH; |
| 7117 | } |
| 7118 | return o; |
| 7119 | } |
| 7120 | |
| 7121 | OP * |
| 7122 | Perl_ck_exit(pTHX_ OP *o) |
| 7123 | { |
| 7124 | PERL_ARGS_ASSERT_CK_EXIT; |
| 7125 | |
| 7126 | #ifdef VMS |
| 7127 | HV * const table = GvHV(PL_hintgv); |
| 7128 | if (table) { |
| 7129 | SV * const * const svp = hv_fetchs(table, "vmsish_exit", FALSE); |
| 7130 | if (svp && *svp && SvTRUE(*svp)) |
| 7131 | o->op_private |= OPpEXIT_VMSISH; |
| 7132 | } |
| 7133 | if (VMSISH_HUSHED) o->op_private |= OPpHUSH_VMSISH; |
| 7134 | #endif |
| 7135 | return ck_fun(o); |
| 7136 | } |
| 7137 | |
| 7138 | OP * |
| 7139 | Perl_ck_exec(pTHX_ OP *o) |
| 7140 | { |
| 7141 | PERL_ARGS_ASSERT_CK_EXEC; |
| 7142 | |
| 7143 | if (o->op_flags & OPf_STACKED) { |
| 7144 | OP *kid; |
| 7145 | o = ck_fun(o); |
| 7146 | kid = cUNOPo->op_first->op_sibling; |
| 7147 | if (kid->op_type == OP_RV2GV) |
| 7148 | op_null(kid); |
| 7149 | } |
| 7150 | else |
| 7151 | o = listkids(o); |
| 7152 | return o; |
| 7153 | } |
| 7154 | |
| 7155 | OP * |
| 7156 | Perl_ck_exists(pTHX_ OP *o) |
| 7157 | { |
| 7158 | dVAR; |
| 7159 | |
| 7160 | PERL_ARGS_ASSERT_CK_EXISTS; |
| 7161 | |
| 7162 | o = ck_fun(o); |
| 7163 | if (o->op_flags & OPf_KIDS) { |
| 7164 | OP * const kid = cUNOPo->op_first; |
| 7165 | if (kid->op_type == OP_ENTERSUB) { |
| 7166 | (void) ref(kid, o->op_type); |
| 7167 | if (kid->op_type != OP_RV2CV |
| 7168 | && !(PL_parser && PL_parser->error_count)) |
| 7169 | Perl_croak(aTHX_ "%s argument is not a subroutine name", |
| 7170 | OP_DESC(o)); |
| 7171 | o->op_private |= OPpEXISTS_SUB; |
| 7172 | } |
| 7173 | else if (kid->op_type == OP_AELEM) |
| 7174 | o->op_flags |= OPf_SPECIAL; |
| 7175 | else if (kid->op_type != OP_HELEM) |
| 7176 | Perl_croak(aTHX_ "%s argument is not a HASH or ARRAY element or a subroutine", |
| 7177 | OP_DESC(o)); |
| 7178 | op_null(kid); |
| 7179 | } |
| 7180 | return o; |
| 7181 | } |
| 7182 | |
| 7183 | OP * |
| 7184 | Perl_ck_rvconst(pTHX_ register OP *o) |
| 7185 | { |
| 7186 | dVAR; |
| 7187 | SVOP * const kid = (SVOP*)cUNOPo->op_first; |
| 7188 | |
| 7189 | PERL_ARGS_ASSERT_CK_RVCONST; |
| 7190 | |
| 7191 | o->op_private |= (PL_hints & HINT_STRICT_REFS); |
| 7192 | if (o->op_type == OP_RV2CV) |
| 7193 | o->op_private &= ~1; |
| 7194 | |
| 7195 | if (kid->op_type == OP_CONST) { |
| 7196 | int iscv; |
| 7197 | GV *gv; |
| 7198 | SV * const kidsv = kid->op_sv; |
| 7199 | |
| 7200 | /* Is it a constant from cv_const_sv()? */ |
| 7201 | if (SvROK(kidsv) && SvREADONLY(kidsv)) { |
| 7202 | SV * const rsv = SvRV(kidsv); |
| 7203 | const svtype type = SvTYPE(rsv); |
| 7204 | const char *badtype = NULL; |
| 7205 | |
| 7206 | switch (o->op_type) { |
| 7207 | case OP_RV2SV: |
| 7208 | if (type > SVt_PVMG) |
| 7209 | badtype = "a SCALAR"; |
| 7210 | break; |
| 7211 | case OP_RV2AV: |
| 7212 | if (type != SVt_PVAV) |
| 7213 | badtype = "an ARRAY"; |
| 7214 | break; |
| 7215 | case OP_RV2HV: |
| 7216 | if (type != SVt_PVHV) |
| 7217 | badtype = "a HASH"; |
| 7218 | break; |
| 7219 | case OP_RV2CV: |
| 7220 | if (type != SVt_PVCV) |
| 7221 | badtype = "a CODE"; |
| 7222 | break; |
| 7223 | } |
| 7224 | if (badtype) |
| 7225 | Perl_croak(aTHX_ "Constant is not %s reference", badtype); |
| 7226 | return o; |
| 7227 | } |
| 7228 | if ((o->op_private & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) { |
| 7229 | const char *badthing; |
| 7230 | switch (o->op_type) { |
| 7231 | case OP_RV2SV: |
| 7232 | badthing = "a SCALAR"; |
| 7233 | break; |
| 7234 | case OP_RV2AV: |
| 7235 | badthing = "an ARRAY"; |
| 7236 | break; |
| 7237 | case OP_RV2HV: |
| 7238 | badthing = "a HASH"; |
| 7239 | break; |
| 7240 | default: |
| 7241 | badthing = NULL; |
| 7242 | break; |
| 7243 | } |
| 7244 | if (badthing) |
| 7245 | Perl_croak(aTHX_ |
| 7246 | "Can't use bareword (\"%"SVf"\") as %s ref while \"strict refs\" in use", |
| 7247 | SVfARG(kidsv), badthing); |
| 7248 | } |
| 7249 | /* |
| 7250 | * This is a little tricky. We only want to add the symbol if we |
| 7251 | * didn't add it in the lexer. Otherwise we get duplicate strict |
| 7252 | * warnings. But if we didn't add it in the lexer, we must at |
| 7253 | * least pretend like we wanted to add it even if it existed before, |
| 7254 | * or we get possible typo warnings. OPpCONST_ENTERED says |
| 7255 | * whether the lexer already added THIS instance of this symbol. |
| 7256 | */ |
| 7257 | iscv = (o->op_type == OP_RV2CV) * 2; |
| 7258 | do { |
| 7259 | gv = gv_fetchsv(kidsv, |
| 7260 | iscv | !(kid->op_private & OPpCONST_ENTERED), |
| 7261 | iscv |
| 7262 | ? SVt_PVCV |
| 7263 | : o->op_type == OP_RV2SV |
| 7264 | ? SVt_PV |
| 7265 | : o->op_type == OP_RV2AV |
| 7266 | ? SVt_PVAV |
| 7267 | : o->op_type == OP_RV2HV |
| 7268 | ? SVt_PVHV |
| 7269 | : SVt_PVGV); |
| 7270 | } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++); |
| 7271 | if (gv) { |
| 7272 | kid->op_type = OP_GV; |
| 7273 | SvREFCNT_dec(kid->op_sv); |
| 7274 | #ifdef USE_ITHREADS |
| 7275 | /* XXX hack: dependence on sizeof(PADOP) <= sizeof(SVOP) */ |
| 7276 | kPADOP->op_padix = pad_alloc(OP_GV, SVs_PADTMP); |
| 7277 | SvREFCNT_dec(PAD_SVl(kPADOP->op_padix)); |
| 7278 | GvIN_PAD_on(gv); |
| 7279 | PAD_SETSV(kPADOP->op_padix, MUTABLE_SV(SvREFCNT_inc_simple_NN(gv))); |
| 7280 | #else |
| 7281 | kid->op_sv = SvREFCNT_inc_simple_NN(gv); |
| 7282 | #endif |
| 7283 | kid->op_private = 0; |
| 7284 | kid->op_ppaddr = PL_ppaddr[OP_GV]; |
| 7285 | } |
| 7286 | } |
| 7287 | return o; |
| 7288 | } |
| 7289 | |
| 7290 | OP * |
| 7291 | Perl_ck_ftst(pTHX_ OP *o) |
| 7292 | { |
| 7293 | dVAR; |
| 7294 | const I32 type = o->op_type; |
| 7295 | |
| 7296 | PERL_ARGS_ASSERT_CK_FTST; |
| 7297 | |
| 7298 | if (o->op_flags & OPf_REF) { |
| 7299 | NOOP; |
| 7300 | } |
| 7301 | else if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) { |
| 7302 | SVOP * const kid = (SVOP*)cUNOPo->op_first; |
| 7303 | const OPCODE kidtype = kid->op_type; |
| 7304 | |
| 7305 | if (kidtype == OP_CONST && (kid->op_private & OPpCONST_BARE)) { |
| 7306 | OP * const newop = newGVOP(type, OPf_REF, |
| 7307 | gv_fetchsv(kid->op_sv, GV_ADD, SVt_PVIO)); |
| 7308 | #ifdef PERL_MAD |
| 7309 | op_getmad(o,newop,'O'); |
| 7310 | #else |
| 7311 | op_free(o); |
| 7312 | #endif |
| 7313 | return newop; |
| 7314 | } |
| 7315 | if ((PL_hints & HINT_FILETEST_ACCESS) && OP_IS_FILETEST_ACCESS(o->op_type)) |
| 7316 | o->op_private |= OPpFT_ACCESS; |
| 7317 | if (PL_check[kidtype] == Perl_ck_ftst |
| 7318 | && kidtype != OP_STAT && kidtype != OP_LSTAT) |
| 7319 | o->op_private |= OPpFT_STACKED; |
| 7320 | } |
| 7321 | else { |
| 7322 | #ifdef PERL_MAD |
| 7323 | OP* const oldo = o; |
| 7324 | #else |
| 7325 | op_free(o); |
| 7326 | #endif |
| 7327 | if (type == OP_FTTTY) |
| 7328 | o = newGVOP(type, OPf_REF, PL_stdingv); |
| 7329 | else |
| 7330 | o = newUNOP(type, 0, newDEFSVOP()); |
| 7331 | op_getmad(oldo,o,'O'); |
| 7332 | } |
| 7333 | return o; |
| 7334 | } |
| 7335 | |
| 7336 | OP * |
| 7337 | Perl_ck_fun(pTHX_ OP *o) |
| 7338 | { |
| 7339 | dVAR; |
| 7340 | const int type = o->op_type; |
| 7341 | register I32 oa = PL_opargs[type] >> OASHIFT; |
| 7342 | |
| 7343 | PERL_ARGS_ASSERT_CK_FUN; |
| 7344 | |
| 7345 | if (o->op_flags & OPf_STACKED) { |
| 7346 | if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL)) |
| 7347 | oa &= ~OA_OPTIONAL; |
| 7348 | else |
| 7349 | return no_fh_allowed(o); |
| 7350 | } |
| 7351 | |
| 7352 | if (o->op_flags & OPf_KIDS) { |
| 7353 | OP **tokid = &cLISTOPo->op_first; |
| 7354 | register OP *kid = cLISTOPo->op_first; |
| 7355 | OP *sibl; |
| 7356 | I32 numargs = 0; |
| 7357 | |
| 7358 | if (kid->op_type == OP_PUSHMARK || |
| 7359 | (kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)) |
| 7360 | { |
| 7361 | tokid = &kid->op_sibling; |
| 7362 | kid = kid->op_sibling; |
| 7363 | } |
| 7364 | if (!kid && PL_opargs[type] & OA_DEFGV) |
| 7365 | *tokid = kid = newDEFSVOP(); |
| 7366 | |
| 7367 | while (oa && kid) { |
| 7368 | numargs++; |
| 7369 | sibl = kid->op_sibling; |
| 7370 | #ifdef PERL_MAD |
| 7371 | if (!sibl && kid->op_type == OP_STUB) { |
| 7372 | numargs--; |
| 7373 | break; |
| 7374 | } |
| 7375 | #endif |
| 7376 | switch (oa & 7) { |
| 7377 | case OA_SCALAR: |
| 7378 | /* list seen where single (scalar) arg expected? */ |
| 7379 | if (numargs == 1 && !(oa >> 4) |
| 7380 | && kid->op_type == OP_LIST && type != OP_SCALAR) |
| 7381 | { |
| 7382 | return too_many_arguments(o,PL_op_desc[type]); |
| 7383 | } |
| 7384 | scalar(kid); |
| 7385 | break; |
| 7386 | case OA_LIST: |
| 7387 | if (oa < 16) { |
| 7388 | kid = 0; |
| 7389 | continue; |
| 7390 | } |
| 7391 | else |
| 7392 | list(kid); |
| 7393 | break; |
| 7394 | case OA_AVREF: |
| 7395 | if ((type == OP_PUSH || type == OP_UNSHIFT) |
| 7396 | && !kid->op_sibling) |
| 7397 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
| 7398 | "Useless use of %s with no values", |
| 7399 | PL_op_desc[type]); |
| 7400 | |
| 7401 | if (kid->op_type == OP_CONST && |
| 7402 | (kid->op_private & OPpCONST_BARE)) |
| 7403 | { |
| 7404 | OP * const newop = newAVREF(newGVOP(OP_GV, 0, |
| 7405 | gv_fetchsv(((SVOP*)kid)->op_sv, GV_ADD, SVt_PVAV) )); |
| 7406 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 7407 | "Array @%"SVf" missing the @ in argument %"IVdf" of %s()", |
| 7408 | SVfARG(((SVOP*)kid)->op_sv), (IV)numargs, PL_op_desc[type]); |
| 7409 | #ifdef PERL_MAD |
| 7410 | op_getmad(kid,newop,'K'); |
| 7411 | #else |
| 7412 | op_free(kid); |
| 7413 | #endif |
| 7414 | kid = newop; |
| 7415 | kid->op_sibling = sibl; |
| 7416 | *tokid = kid; |
| 7417 | } |
| 7418 | else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV) |
| 7419 | bad_type(numargs, "array", PL_op_desc[type], kid); |
| 7420 | mod(kid, type); |
| 7421 | break; |
| 7422 | case OA_HVREF: |
| 7423 | if (kid->op_type == OP_CONST && |
| 7424 | (kid->op_private & OPpCONST_BARE)) |
| 7425 | { |
| 7426 | OP * const newop = newHVREF(newGVOP(OP_GV, 0, |
| 7427 | gv_fetchsv(((SVOP*)kid)->op_sv, GV_ADD, SVt_PVHV) )); |
| 7428 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 7429 | "Hash %%%"SVf" missing the %% in argument %"IVdf" of %s()", |
| 7430 | SVfARG(((SVOP*)kid)->op_sv), (IV)numargs, PL_op_desc[type]); |
| 7431 | #ifdef PERL_MAD |
| 7432 | op_getmad(kid,newop,'K'); |
| 7433 | #else |
| 7434 | op_free(kid); |
| 7435 | #endif |
| 7436 | kid = newop; |
| 7437 | kid->op_sibling = sibl; |
| 7438 | *tokid = kid; |
| 7439 | } |
| 7440 | else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV) |
| 7441 | bad_type(numargs, "hash", PL_op_desc[type], kid); |
| 7442 | mod(kid, type); |
| 7443 | break; |
| 7444 | case OA_CVREF: |
| 7445 | { |
| 7446 | OP * const newop = newUNOP(OP_NULL, 0, kid); |
| 7447 | kid->op_sibling = 0; |
| 7448 | LINKLIST(kid); |
| 7449 | newop->op_next = newop; |
| 7450 | kid = newop; |
| 7451 | kid->op_sibling = sibl; |
| 7452 | *tokid = kid; |
| 7453 | } |
| 7454 | break; |
| 7455 | case OA_FILEREF: |
| 7456 | if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) { |
| 7457 | if (kid->op_type == OP_CONST && |
| 7458 | (kid->op_private & OPpCONST_BARE)) |
| 7459 | { |
| 7460 | OP * const newop = newGVOP(OP_GV, 0, |
| 7461 | gv_fetchsv(((SVOP*)kid)->op_sv, GV_ADD, SVt_PVIO)); |
| 7462 | if (!(o->op_private & 1) && /* if not unop */ |
| 7463 | kid == cLISTOPo->op_last) |
| 7464 | cLISTOPo->op_last = newop; |
| 7465 | #ifdef PERL_MAD |
| 7466 | op_getmad(kid,newop,'K'); |
| 7467 | #else |
| 7468 | op_free(kid); |
| 7469 | #endif |
| 7470 | kid = newop; |
| 7471 | } |
| 7472 | else if (kid->op_type == OP_READLINE) { |
| 7473 | /* neophyte patrol: open(<FH>), close(<FH>) etc. */ |
| 7474 | bad_type(numargs, "HANDLE", OP_DESC(o), kid); |
| 7475 | } |
| 7476 | else { |
| 7477 | I32 flags = OPf_SPECIAL; |
| 7478 | I32 priv = 0; |
| 7479 | PADOFFSET targ = 0; |
| 7480 | |
| 7481 | /* is this op a FH constructor? */ |
| 7482 | if (is_handle_constructor(o,numargs)) { |
| 7483 | const char *name = NULL; |
| 7484 | STRLEN len = 0; |
| 7485 | |
| 7486 | flags = 0; |
| 7487 | /* Set a flag to tell rv2gv to vivify |
| 7488 | * need to "prove" flag does not mean something |
| 7489 | * else already - NI-S 1999/05/07 |
| 7490 | */ |
| 7491 | priv = OPpDEREF; |
| 7492 | if (kid->op_type == OP_PADSV) { |
| 7493 | SV *const namesv |
| 7494 | = PAD_COMPNAME_SV(kid->op_targ); |
| 7495 | name = SvPV_const(namesv, len); |
| 7496 | } |
| 7497 | else if (kid->op_type == OP_RV2SV |
| 7498 | && kUNOP->op_first->op_type == OP_GV) |
| 7499 | { |
| 7500 | GV * const gv = cGVOPx_gv(kUNOP->op_first); |
| 7501 | name = GvNAME(gv); |
| 7502 | len = GvNAMELEN(gv); |
| 7503 | } |
| 7504 | else if (kid->op_type == OP_AELEM |
| 7505 | || kid->op_type == OP_HELEM) |
| 7506 | { |
| 7507 | OP *firstop; |
| 7508 | OP *op = ((BINOP*)kid)->op_first; |
| 7509 | name = NULL; |
| 7510 | if (op) { |
| 7511 | SV *tmpstr = NULL; |
| 7512 | const char * const a = |
| 7513 | kid->op_type == OP_AELEM ? |
| 7514 | "[]" : "{}"; |
| 7515 | if (((op->op_type == OP_RV2AV) || |
| 7516 | (op->op_type == OP_RV2HV)) && |
| 7517 | (firstop = ((UNOP*)op)->op_first) && |
| 7518 | (firstop->op_type == OP_GV)) { |
| 7519 | /* packagevar $a[] or $h{} */ |
| 7520 | GV * const gv = cGVOPx_gv(firstop); |
| 7521 | if (gv) |
| 7522 | tmpstr = |
| 7523 | Perl_newSVpvf(aTHX_ |
| 7524 | "%s%c...%c", |
| 7525 | GvNAME(gv), |
| 7526 | a[0], a[1]); |
| 7527 | } |
| 7528 | else if (op->op_type == OP_PADAV |
| 7529 | || op->op_type == OP_PADHV) { |
| 7530 | /* lexicalvar $a[] or $h{} */ |
| 7531 | const char * const padname = |
| 7532 | PAD_COMPNAME_PV(op->op_targ); |
| 7533 | if (padname) |
| 7534 | tmpstr = |
| 7535 | Perl_newSVpvf(aTHX_ |
| 7536 | "%s%c...%c", |
| 7537 | padname + 1, |
| 7538 | a[0], a[1]); |
| 7539 | } |
| 7540 | if (tmpstr) { |
| 7541 | name = SvPV_const(tmpstr, len); |
| 7542 | sv_2mortal(tmpstr); |
| 7543 | } |
| 7544 | } |
| 7545 | if (!name) { |
| 7546 | name = "__ANONIO__"; |
| 7547 | len = 10; |
| 7548 | } |
| 7549 | mod(kid, type); |
| 7550 | } |
| 7551 | if (name) { |
| 7552 | SV *namesv; |
| 7553 | targ = pad_alloc(OP_RV2GV, SVs_PADTMP); |
| 7554 | namesv = PAD_SVl(targ); |
| 7555 | SvUPGRADE(namesv, SVt_PV); |
| 7556 | if (*name != '$') |
| 7557 | sv_setpvs(namesv, "$"); |
| 7558 | sv_catpvn(namesv, name, len); |
| 7559 | } |
| 7560 | } |
| 7561 | kid->op_sibling = 0; |
| 7562 | kid = newUNOP(OP_RV2GV, flags, scalar(kid)); |
| 7563 | kid->op_targ = targ; |
| 7564 | kid->op_private |= priv; |
| 7565 | } |
| 7566 | kid->op_sibling = sibl; |
| 7567 | *tokid = kid; |
| 7568 | } |
| 7569 | scalar(kid); |
| 7570 | break; |
| 7571 | case OA_SCALARREF: |
| 7572 | mod(scalar(kid), type); |
| 7573 | break; |
| 7574 | } |
| 7575 | oa >>= 4; |
| 7576 | tokid = &kid->op_sibling; |
| 7577 | kid = kid->op_sibling; |
| 7578 | } |
| 7579 | #ifdef PERL_MAD |
| 7580 | if (kid && kid->op_type != OP_STUB) |
| 7581 | return too_many_arguments(o,OP_DESC(o)); |
| 7582 | o->op_private |= numargs; |
| 7583 | #else |
| 7584 | /* FIXME - should the numargs move as for the PERL_MAD case? */ |
| 7585 | o->op_private |= numargs; |
| 7586 | if (kid) |
| 7587 | return too_many_arguments(o,OP_DESC(o)); |
| 7588 | #endif |
| 7589 | listkids(o); |
| 7590 | } |
| 7591 | else if (PL_opargs[type] & OA_DEFGV) { |
| 7592 | #ifdef PERL_MAD |
| 7593 | OP *newop = newUNOP(type, 0, newDEFSVOP()); |
| 7594 | op_getmad(o,newop,'O'); |
| 7595 | return newop; |
| 7596 | #else |
| 7597 | /* Ordering of these two is important to keep f_map.t passing. */ |
| 7598 | op_free(o); |
| 7599 | return newUNOP(type, 0, newDEFSVOP()); |
| 7600 | #endif |
| 7601 | } |
| 7602 | |
| 7603 | if (oa) { |
| 7604 | while (oa & OA_OPTIONAL) |
| 7605 | oa >>= 4; |
| 7606 | if (oa && oa != OA_LIST) |
| 7607 | return too_few_arguments(o,OP_DESC(o)); |
| 7608 | } |
| 7609 | return o; |
| 7610 | } |
| 7611 | |
| 7612 | OP * |
| 7613 | Perl_ck_glob(pTHX_ OP *o) |
| 7614 | { |
| 7615 | dVAR; |
| 7616 | GV *gv; |
| 7617 | |
| 7618 | PERL_ARGS_ASSERT_CK_GLOB; |
| 7619 | |
| 7620 | o = ck_fun(o); |
| 7621 | if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling) |
| 7622 | op_append_elem(OP_GLOB, o, newDEFSVOP()); |
| 7623 | |
| 7624 | if (!((gv = gv_fetchpvs("glob", GV_NOTQUAL, SVt_PVCV)) |
| 7625 | && GvCVu(gv) && GvIMPORTED_CV(gv))) |
| 7626 | { |
| 7627 | gv = gv_fetchpvs("CORE::GLOBAL::glob", 0, SVt_PVCV); |
| 7628 | } |
| 7629 | |
| 7630 | #if !defined(PERL_EXTERNAL_GLOB) |
| 7631 | /* XXX this can be tightened up and made more failsafe. */ |
| 7632 | if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) { |
| 7633 | GV *glob_gv; |
| 7634 | ENTER; |
| 7635 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
| 7636 | newSVpvs("File::Glob"), NULL, NULL, NULL); |
| 7637 | if((glob_gv = gv_fetchpvs("File::Glob::csh_glob", 0, SVt_PVCV))) { |
| 7638 | gv = gv_fetchpvs("CORE::GLOBAL::glob", 0, SVt_PVCV); |
| 7639 | GvCV(gv) = GvCV(glob_gv); |
| 7640 | SvREFCNT_inc_void(MUTABLE_SV(GvCV(gv))); |
| 7641 | GvIMPORTED_CV_on(gv); |
| 7642 | } |
| 7643 | LEAVE; |
| 7644 | } |
| 7645 | #endif /* PERL_EXTERNAL_GLOB */ |
| 7646 | |
| 7647 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) { |
| 7648 | op_append_elem(OP_GLOB, o, |
| 7649 | newSVOP(OP_CONST, 0, newSViv(PL_glob_index++))); |
| 7650 | o->op_type = OP_LIST; |
| 7651 | o->op_ppaddr = PL_ppaddr[OP_LIST]; |
| 7652 | cLISTOPo->op_first->op_type = OP_PUSHMARK; |
| 7653 | cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK]; |
| 7654 | cLISTOPo->op_first->op_targ = 0; |
| 7655 | o = newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 7656 | op_append_elem(OP_LIST, o, |
| 7657 | scalar(newUNOP(OP_RV2CV, 0, |
| 7658 | newGVOP(OP_GV, 0, gv))))); |
| 7659 | o = newUNOP(OP_NULL, 0, ck_subr(o)); |
| 7660 | o->op_targ = OP_GLOB; /* hint at what it used to be */ |
| 7661 | return o; |
| 7662 | } |
| 7663 | gv = newGVgen("main"); |
| 7664 | gv_IOadd(gv); |
| 7665 | op_append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv)); |
| 7666 | scalarkids(o); |
| 7667 | return o; |
| 7668 | } |
| 7669 | |
| 7670 | OP * |
| 7671 | Perl_ck_grep(pTHX_ OP *o) |
| 7672 | { |
| 7673 | dVAR; |
| 7674 | LOGOP *gwop = NULL; |
| 7675 | OP *kid; |
| 7676 | const OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE; |
| 7677 | PADOFFSET offset; |
| 7678 | |
| 7679 | PERL_ARGS_ASSERT_CK_GREP; |
| 7680 | |
| 7681 | o->op_ppaddr = PL_ppaddr[OP_GREPSTART]; |
| 7682 | /* don't allocate gwop here, as we may leak it if PL_parser->error_count > 0 */ |
| 7683 | |
| 7684 | if (o->op_flags & OPf_STACKED) { |
| 7685 | OP* k; |
| 7686 | o = ck_sort(o); |
| 7687 | kid = cUNOPx(cLISTOPo->op_first->op_sibling)->op_first; |
| 7688 | if (kid->op_type != OP_SCOPE && kid->op_type != OP_LEAVE) |
| 7689 | return no_fh_allowed(o); |
| 7690 | for (k = kid; k; k = k->op_next) { |
| 7691 | kid = k; |
| 7692 | } |
| 7693 | NewOp(1101, gwop, 1, LOGOP); |
| 7694 | kid->op_next = (OP*)gwop; |
| 7695 | o->op_flags &= ~OPf_STACKED; |
| 7696 | } |
| 7697 | kid = cLISTOPo->op_first->op_sibling; |
| 7698 | if (type == OP_MAPWHILE) |
| 7699 | list(kid); |
| 7700 | else |
| 7701 | scalar(kid); |
| 7702 | o = ck_fun(o); |
| 7703 | if (PL_parser && PL_parser->error_count) |
| 7704 | return o; |
| 7705 | kid = cLISTOPo->op_first->op_sibling; |
| 7706 | if (kid->op_type != OP_NULL) |
| 7707 | Perl_croak(aTHX_ "panic: ck_grep"); |
| 7708 | kid = kUNOP->op_first; |
| 7709 | |
| 7710 | if (!gwop) |
| 7711 | NewOp(1101, gwop, 1, LOGOP); |
| 7712 | gwop->op_type = type; |
| 7713 | gwop->op_ppaddr = PL_ppaddr[type]; |
| 7714 | gwop->op_first = listkids(o); |
| 7715 | gwop->op_flags |= OPf_KIDS; |
| 7716 | gwop->op_other = LINKLIST(kid); |
| 7717 | kid->op_next = (OP*)gwop; |
| 7718 | offset = Perl_pad_findmy(aTHX_ STR_WITH_LEN("$_"), 0); |
| 7719 | if (offset == NOT_IN_PAD || PAD_COMPNAME_FLAGS_isOUR(offset)) { |
| 7720 | o->op_private = gwop->op_private = 0; |
| 7721 | gwop->op_targ = pad_alloc(type, SVs_PADTMP); |
| 7722 | } |
| 7723 | else { |
| 7724 | o->op_private = gwop->op_private = OPpGREP_LEX; |
| 7725 | gwop->op_targ = o->op_targ = offset; |
| 7726 | } |
| 7727 | |
| 7728 | kid = cLISTOPo->op_first->op_sibling; |
| 7729 | if (!kid || !kid->op_sibling) |
| 7730 | return too_few_arguments(o,OP_DESC(o)); |
| 7731 | for (kid = kid->op_sibling; kid; kid = kid->op_sibling) |
| 7732 | mod(kid, OP_GREPSTART); |
| 7733 | |
| 7734 | return (OP*)gwop; |
| 7735 | } |
| 7736 | |
| 7737 | OP * |
| 7738 | Perl_ck_index(pTHX_ OP *o) |
| 7739 | { |
| 7740 | PERL_ARGS_ASSERT_CK_INDEX; |
| 7741 | |
| 7742 | if (o->op_flags & OPf_KIDS) { |
| 7743 | OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ |
| 7744 | if (kid) |
| 7745 | kid = kid->op_sibling; /* get past "big" */ |
| 7746 | if (kid && kid->op_type == OP_CONST) |
| 7747 | fbm_compile(((SVOP*)kid)->op_sv, 0); |
| 7748 | } |
| 7749 | return ck_fun(o); |
| 7750 | } |
| 7751 | |
| 7752 | OP * |
| 7753 | Perl_ck_lfun(pTHX_ OP *o) |
| 7754 | { |
| 7755 | const OPCODE type = o->op_type; |
| 7756 | |
| 7757 | PERL_ARGS_ASSERT_CK_LFUN; |
| 7758 | |
| 7759 | return modkids(ck_fun(o), type); |
| 7760 | } |
| 7761 | |
| 7762 | OP * |
| 7763 | Perl_ck_defined(pTHX_ OP *o) /* 19990527 MJD */ |
| 7764 | { |
| 7765 | PERL_ARGS_ASSERT_CK_DEFINED; |
| 7766 | |
| 7767 | if ((o->op_flags & OPf_KIDS)) { |
| 7768 | switch (cUNOPo->op_first->op_type) { |
| 7769 | case OP_RV2AV: |
| 7770 | /* This is needed for |
| 7771 | if (defined %stash::) |
| 7772 | to work. Do not break Tk. |
| 7773 | */ |
| 7774 | break; /* Globals via GV can be undef */ |
| 7775 | case OP_PADAV: |
| 7776 | case OP_AASSIGN: /* Is this a good idea? */ |
| 7777 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 7778 | "defined(@array) is deprecated"); |
| 7779 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 7780 | "\t(Maybe you should just omit the defined()?)\n"); |
| 7781 | break; |
| 7782 | case OP_RV2HV: |
| 7783 | case OP_PADHV: |
| 7784 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 7785 | "defined(%%hash) is deprecated"); |
| 7786 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
| 7787 | "\t(Maybe you should just omit the defined()?)\n"); |
| 7788 | break; |
| 7789 | default: |
| 7790 | /* no warning */ |
| 7791 | break; |
| 7792 | } |
| 7793 | } |
| 7794 | return ck_rfun(o); |
| 7795 | } |
| 7796 | |
| 7797 | OP * |
| 7798 | Perl_ck_readline(pTHX_ OP *o) |
| 7799 | { |
| 7800 | PERL_ARGS_ASSERT_CK_READLINE; |
| 7801 | |
| 7802 | if (!(o->op_flags & OPf_KIDS)) { |
| 7803 | OP * const newop |
| 7804 | = newUNOP(OP_READLINE, 0, newGVOP(OP_GV, 0, PL_argvgv)); |
| 7805 | #ifdef PERL_MAD |
| 7806 | op_getmad(o,newop,'O'); |
| 7807 | #else |
| 7808 | op_free(o); |
| 7809 | #endif |
| 7810 | return newop; |
| 7811 | } |
| 7812 | return o; |
| 7813 | } |
| 7814 | |
| 7815 | OP * |
| 7816 | Perl_ck_rfun(pTHX_ OP *o) |
| 7817 | { |
| 7818 | const OPCODE type = o->op_type; |
| 7819 | |
| 7820 | PERL_ARGS_ASSERT_CK_RFUN; |
| 7821 | |
| 7822 | return refkids(ck_fun(o), type); |
| 7823 | } |
| 7824 | |
| 7825 | OP * |
| 7826 | Perl_ck_listiob(pTHX_ OP *o) |
| 7827 | { |
| 7828 | register OP *kid; |
| 7829 | |
| 7830 | PERL_ARGS_ASSERT_CK_LISTIOB; |
| 7831 | |
| 7832 | kid = cLISTOPo->op_first; |
| 7833 | if (!kid) { |
| 7834 | o = force_list(o); |
| 7835 | kid = cLISTOPo->op_first; |
| 7836 | } |
| 7837 | if (kid->op_type == OP_PUSHMARK) |
| 7838 | kid = kid->op_sibling; |
| 7839 | if (kid && o->op_flags & OPf_STACKED) |
| 7840 | kid = kid->op_sibling; |
| 7841 | else if (kid && !kid->op_sibling) { /* print HANDLE; */ |
| 7842 | if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) { |
| 7843 | o->op_flags |= OPf_STACKED; /* make it a filehandle */ |
| 7844 | kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid)); |
| 7845 | cLISTOPo->op_first->op_sibling = kid; |
| 7846 | cLISTOPo->op_last = kid; |
| 7847 | kid = kid->op_sibling; |
| 7848 | } |
| 7849 | } |
| 7850 | |
| 7851 | if (!kid) |
| 7852 | op_append_elem(o->op_type, o, newDEFSVOP()); |
| 7853 | |
| 7854 | return listkids(o); |
| 7855 | } |
| 7856 | |
| 7857 | OP * |
| 7858 | Perl_ck_smartmatch(pTHX_ OP *o) |
| 7859 | { |
| 7860 | dVAR; |
| 7861 | PERL_ARGS_ASSERT_CK_SMARTMATCH; |
| 7862 | if (0 == (o->op_flags & OPf_SPECIAL)) { |
| 7863 | OP *first = cBINOPo->op_first; |
| 7864 | OP *second = first->op_sibling; |
| 7865 | |
| 7866 | /* Implicitly take a reference to an array or hash */ |
| 7867 | first->op_sibling = NULL; |
| 7868 | first = cBINOPo->op_first = ref_array_or_hash(first); |
| 7869 | second = first->op_sibling = ref_array_or_hash(second); |
| 7870 | |
| 7871 | /* Implicitly take a reference to a regular expression */ |
| 7872 | if (first->op_type == OP_MATCH) { |
| 7873 | first->op_type = OP_QR; |
| 7874 | first->op_ppaddr = PL_ppaddr[OP_QR]; |
| 7875 | } |
| 7876 | if (second->op_type == OP_MATCH) { |
| 7877 | second->op_type = OP_QR; |
| 7878 | second->op_ppaddr = PL_ppaddr[OP_QR]; |
| 7879 | } |
| 7880 | } |
| 7881 | |
| 7882 | return o; |
| 7883 | } |
| 7884 | |
| 7885 | |
| 7886 | OP * |
| 7887 | Perl_ck_sassign(pTHX_ OP *o) |
| 7888 | { |
| 7889 | dVAR; |
| 7890 | OP * const kid = cLISTOPo->op_first; |
| 7891 | |
| 7892 | PERL_ARGS_ASSERT_CK_SASSIGN; |
| 7893 | |
| 7894 | /* has a disposable target? */ |
| 7895 | if ((PL_opargs[kid->op_type] & OA_TARGLEX) |
| 7896 | && !(kid->op_flags & OPf_STACKED) |
| 7897 | /* Cannot steal the second time! */ |
| 7898 | && !(kid->op_private & OPpTARGET_MY) |
| 7899 | /* Keep the full thing for madskills */ |
| 7900 | && !PL_madskills |
| 7901 | ) |
| 7902 | { |
| 7903 | OP * const kkid = kid->op_sibling; |
| 7904 | |
| 7905 | /* Can just relocate the target. */ |
| 7906 | if (kkid && kkid->op_type == OP_PADSV |
| 7907 | && !(kkid->op_private & OPpLVAL_INTRO)) |
| 7908 | { |
| 7909 | kid->op_targ = kkid->op_targ; |
| 7910 | kkid->op_targ = 0; |
| 7911 | /* Now we do not need PADSV and SASSIGN. */ |
| 7912 | kid->op_sibling = o->op_sibling; /* NULL */ |
| 7913 | cLISTOPo->op_first = NULL; |
| 7914 | op_free(o); |
| 7915 | op_free(kkid); |
| 7916 | kid->op_private |= OPpTARGET_MY; /* Used for context settings */ |
| 7917 | return kid; |
| 7918 | } |
| 7919 | } |
| 7920 | if (kid->op_sibling) { |
| 7921 | OP *kkid = kid->op_sibling; |
| 7922 | if (kkid->op_type == OP_PADSV |
| 7923 | && (kkid->op_private & OPpLVAL_INTRO) |
| 7924 | && SvPAD_STATE(*av_fetch(PL_comppad_name, kkid->op_targ, FALSE))) { |
| 7925 | const PADOFFSET target = kkid->op_targ; |
| 7926 | OP *const other = newOP(OP_PADSV, |
| 7927 | kkid->op_flags |
| 7928 | | ((kkid->op_private & ~OPpLVAL_INTRO) << 8)); |
| 7929 | OP *const first = newOP(OP_NULL, 0); |
| 7930 | OP *const nullop = newCONDOP(0, first, o, other); |
| 7931 | OP *const condop = first->op_next; |
| 7932 | /* hijacking PADSTALE for uninitialized state variables */ |
| 7933 | SvPADSTALE_on(PAD_SVl(target)); |
| 7934 | |
| 7935 | condop->op_type = OP_ONCE; |
| 7936 | condop->op_ppaddr = PL_ppaddr[OP_ONCE]; |
| 7937 | condop->op_targ = target; |
| 7938 | other->op_targ = target; |
| 7939 | |
| 7940 | /* Because we change the type of the op here, we will skip the |
| 7941 | assinment binop->op_last = binop->op_first->op_sibling; at the |
| 7942 | end of Perl_newBINOP(). So need to do it here. */ |
| 7943 | cBINOPo->op_last = cBINOPo->op_first->op_sibling; |
| 7944 | |
| 7945 | return nullop; |
| 7946 | } |
| 7947 | } |
| 7948 | return o; |
| 7949 | } |
| 7950 | |
| 7951 | OP * |
| 7952 | Perl_ck_match(pTHX_ OP *o) |
| 7953 | { |
| 7954 | dVAR; |
| 7955 | |
| 7956 | PERL_ARGS_ASSERT_CK_MATCH; |
| 7957 | |
| 7958 | if (o->op_type != OP_QR && PL_compcv) { |
| 7959 | const PADOFFSET offset = Perl_pad_findmy(aTHX_ STR_WITH_LEN("$_"), 0); |
| 7960 | if (offset != NOT_IN_PAD && !(PAD_COMPNAME_FLAGS_isOUR(offset))) { |
| 7961 | o->op_targ = offset; |
| 7962 | o->op_private |= OPpTARGET_MY; |
| 7963 | } |
| 7964 | } |
| 7965 | if (o->op_type == OP_MATCH || o->op_type == OP_QR) |
| 7966 | o->op_private |= OPpRUNTIME; |
| 7967 | return o; |
| 7968 | } |
| 7969 | |
| 7970 | OP * |
| 7971 | Perl_ck_method(pTHX_ OP *o) |
| 7972 | { |
| 7973 | OP * const kid = cUNOPo->op_first; |
| 7974 | |
| 7975 | PERL_ARGS_ASSERT_CK_METHOD; |
| 7976 | |
| 7977 | if (kid->op_type == OP_CONST) { |
| 7978 | SV* sv = kSVOP->op_sv; |
| 7979 | const char * const method = SvPVX_const(sv); |
| 7980 | if (!(strchr(method, ':') || strchr(method, '\''))) { |
| 7981 | OP *cmop; |
| 7982 | if (!SvREADONLY(sv) || !SvFAKE(sv)) { |
| 7983 | sv = newSVpvn_share(method, SvCUR(sv), 0); |
| 7984 | } |
| 7985 | else { |
| 7986 | kSVOP->op_sv = NULL; |
| 7987 | } |
| 7988 | cmop = newSVOP(OP_METHOD_NAMED, 0, sv); |
| 7989 | #ifdef PERL_MAD |
| 7990 | op_getmad(o,cmop,'O'); |
| 7991 | #else |
| 7992 | op_free(o); |
| 7993 | #endif |
| 7994 | return cmop; |
| 7995 | } |
| 7996 | } |
| 7997 | return o; |
| 7998 | } |
| 7999 | |
| 8000 | OP * |
| 8001 | Perl_ck_null(pTHX_ OP *o) |
| 8002 | { |
| 8003 | PERL_ARGS_ASSERT_CK_NULL; |
| 8004 | PERL_UNUSED_CONTEXT; |
| 8005 | return o; |
| 8006 | } |
| 8007 | |
| 8008 | OP * |
| 8009 | Perl_ck_open(pTHX_ OP *o) |
| 8010 | { |
| 8011 | dVAR; |
| 8012 | HV * const table = GvHV(PL_hintgv); |
| 8013 | |
| 8014 | PERL_ARGS_ASSERT_CK_OPEN; |
| 8015 | |
| 8016 | if (table) { |
| 8017 | SV **svp = hv_fetchs(table, "open_IN", FALSE); |
| 8018 | if (svp && *svp) { |
| 8019 | STRLEN len = 0; |
| 8020 | const char *d = SvPV_const(*svp, len); |
| 8021 | const I32 mode = mode_from_discipline(d, len); |
| 8022 | if (mode & O_BINARY) |
| 8023 | o->op_private |= OPpOPEN_IN_RAW; |
| 8024 | else if (mode & O_TEXT) |
| 8025 | o->op_private |= OPpOPEN_IN_CRLF; |
| 8026 | } |
| 8027 | |
| 8028 | svp = hv_fetchs(table, "open_OUT", FALSE); |
| 8029 | if (svp && *svp) { |
| 8030 | STRLEN len = 0; |
| 8031 | const char *d = SvPV_const(*svp, len); |
| 8032 | const I32 mode = mode_from_discipline(d, len); |
| 8033 | if (mode & O_BINARY) |
| 8034 | o->op_private |= OPpOPEN_OUT_RAW; |
| 8035 | else if (mode & O_TEXT) |
| 8036 | o->op_private |= OPpOPEN_OUT_CRLF; |
| 8037 | } |
| 8038 | } |
| 8039 | if (o->op_type == OP_BACKTICK) { |
| 8040 | if (!(o->op_flags & OPf_KIDS)) { |
| 8041 | OP * const newop = newUNOP(OP_BACKTICK, 0, newDEFSVOP()); |
| 8042 | #ifdef PERL_MAD |
| 8043 | op_getmad(o,newop,'O'); |
| 8044 | #else |
| 8045 | op_free(o); |
| 8046 | #endif |
| 8047 | return newop; |
| 8048 | } |
| 8049 | return o; |
| 8050 | } |
| 8051 | { |
| 8052 | /* In case of three-arg dup open remove strictness |
| 8053 | * from the last arg if it is a bareword. */ |
| 8054 | OP * const first = cLISTOPx(o)->op_first; /* The pushmark. */ |
| 8055 | OP * const last = cLISTOPx(o)->op_last; /* The bareword. */ |
| 8056 | OP *oa; |
| 8057 | const char *mode; |
| 8058 | |
| 8059 | if ((last->op_type == OP_CONST) && /* The bareword. */ |
| 8060 | (last->op_private & OPpCONST_BARE) && |
| 8061 | (last->op_private & OPpCONST_STRICT) && |
| 8062 | (oa = first->op_sibling) && /* The fh. */ |
| 8063 | (oa = oa->op_sibling) && /* The mode. */ |
| 8064 | (oa->op_type == OP_CONST) && |
| 8065 | SvPOK(((SVOP*)oa)->op_sv) && |
| 8066 | (mode = SvPVX_const(((SVOP*)oa)->op_sv)) && |
| 8067 | mode[0] == '>' && mode[1] == '&' && /* A dup open. */ |
| 8068 | (last == oa->op_sibling)) /* The bareword. */ |
| 8069 | last->op_private &= ~OPpCONST_STRICT; |
| 8070 | } |
| 8071 | return ck_fun(o); |
| 8072 | } |
| 8073 | |
| 8074 | OP * |
| 8075 | Perl_ck_repeat(pTHX_ OP *o) |
| 8076 | { |
| 8077 | PERL_ARGS_ASSERT_CK_REPEAT; |
| 8078 | |
| 8079 | if (cBINOPo->op_first->op_flags & OPf_PARENS) { |
| 8080 | o->op_private |= OPpREPEAT_DOLIST; |
| 8081 | cBINOPo->op_first = force_list(cBINOPo->op_first); |
| 8082 | } |
| 8083 | else |
| 8084 | scalar(o); |
| 8085 | return o; |
| 8086 | } |
| 8087 | |
| 8088 | OP * |
| 8089 | Perl_ck_require(pTHX_ OP *o) |
| 8090 | { |
| 8091 | dVAR; |
| 8092 | GV* gv = NULL; |
| 8093 | |
| 8094 | PERL_ARGS_ASSERT_CK_REQUIRE; |
| 8095 | |
| 8096 | if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */ |
| 8097 | SVOP * const kid = (SVOP*)cUNOPo->op_first; |
| 8098 | |
| 8099 | if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) { |
| 8100 | SV * const sv = kid->op_sv; |
| 8101 | U32 was_readonly = SvREADONLY(sv); |
| 8102 | char *s; |
| 8103 | STRLEN len; |
| 8104 | const char *end; |
| 8105 | |
| 8106 | if (was_readonly) { |
| 8107 | if (SvFAKE(sv)) { |
| 8108 | sv_force_normal_flags(sv, 0); |
| 8109 | assert(!SvREADONLY(sv)); |
| 8110 | was_readonly = 0; |
| 8111 | } else { |
| 8112 | SvREADONLY_off(sv); |
| 8113 | } |
| 8114 | } |
| 8115 | |
| 8116 | s = SvPVX(sv); |
| 8117 | len = SvCUR(sv); |
| 8118 | end = s + len; |
| 8119 | for (; s < end; s++) { |
| 8120 | if (*s == ':' && s[1] == ':') { |
| 8121 | *s = '/'; |
| 8122 | Move(s+2, s+1, end - s - 1, char); |
| 8123 | --end; |
| 8124 | } |
| 8125 | } |
| 8126 | SvEND_set(sv, end); |
| 8127 | sv_catpvs(sv, ".pm"); |
| 8128 | SvFLAGS(sv) |= was_readonly; |
| 8129 | } |
| 8130 | } |
| 8131 | |
| 8132 | if (!(o->op_flags & OPf_SPECIAL)) { /* Wasn't written as CORE::require */ |
| 8133 | /* handle override, if any */ |
| 8134 | gv = gv_fetchpvs("require", GV_NOTQUAL, SVt_PVCV); |
| 8135 | if (!(gv && GvCVu(gv) && GvIMPORTED_CV(gv))) { |
| 8136 | GV * const * const gvp = (GV**)hv_fetchs(PL_globalstash, "require", FALSE); |
| 8137 | gv = gvp ? *gvp : NULL; |
| 8138 | } |
| 8139 | } |
| 8140 | |
| 8141 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) { |
| 8142 | OP * const kid = cUNOPo->op_first; |
| 8143 | OP * newop; |
| 8144 | |
| 8145 | cUNOPo->op_first = 0; |
| 8146 | #ifndef PERL_MAD |
| 8147 | op_free(o); |
| 8148 | #endif |
| 8149 | newop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED, |
| 8150 | op_append_elem(OP_LIST, kid, |
| 8151 | scalar(newUNOP(OP_RV2CV, 0, |
| 8152 | newGVOP(OP_GV, 0, |
| 8153 | gv)))))); |
| 8154 | op_getmad(o,newop,'O'); |
| 8155 | return newop; |
| 8156 | } |
| 8157 | |
| 8158 | return scalar(ck_fun(o)); |
| 8159 | } |
| 8160 | |
| 8161 | OP * |
| 8162 | Perl_ck_return(pTHX_ OP *o) |
| 8163 | { |
| 8164 | dVAR; |
| 8165 | OP *kid; |
| 8166 | |
| 8167 | PERL_ARGS_ASSERT_CK_RETURN; |
| 8168 | |
| 8169 | kid = cLISTOPo->op_first->op_sibling; |
| 8170 | if (CvLVALUE(PL_compcv)) { |
| 8171 | for (; kid; kid = kid->op_sibling) |
| 8172 | mod(kid, OP_LEAVESUBLV); |
| 8173 | } else { |
| 8174 | for (; kid; kid = kid->op_sibling) |
| 8175 | if ((kid->op_type == OP_NULL) |
| 8176 | && ((kid->op_flags & (OPf_SPECIAL|OPf_KIDS)) == (OPf_SPECIAL|OPf_KIDS))) { |
| 8177 | /* This is a do block */ |
| 8178 | OP *op = kUNOP->op_first; |
| 8179 | if (op->op_type == OP_LEAVE && op->op_flags & OPf_KIDS) { |
| 8180 | op = cUNOPx(op)->op_first; |
| 8181 | assert(op->op_type == OP_ENTER && !(op->op_flags & OPf_SPECIAL)); |
| 8182 | /* Force the use of the caller's context */ |
| 8183 | op->op_flags |= OPf_SPECIAL; |
| 8184 | } |
| 8185 | } |
| 8186 | } |
| 8187 | |
| 8188 | return o; |
| 8189 | } |
| 8190 | |
| 8191 | OP * |
| 8192 | Perl_ck_select(pTHX_ OP *o) |
| 8193 | { |
| 8194 | dVAR; |
| 8195 | OP* kid; |
| 8196 | |
| 8197 | PERL_ARGS_ASSERT_CK_SELECT; |
| 8198 | |
| 8199 | if (o->op_flags & OPf_KIDS) { |
| 8200 | kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ |
| 8201 | if (kid && kid->op_sibling) { |
| 8202 | o->op_type = OP_SSELECT; |
| 8203 | o->op_ppaddr = PL_ppaddr[OP_SSELECT]; |
| 8204 | o = ck_fun(o); |
| 8205 | return fold_constants(o); |
| 8206 | } |
| 8207 | } |
| 8208 | o = ck_fun(o); |
| 8209 | kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ |
| 8210 | if (kid && kid->op_type == OP_RV2GV) |
| 8211 | kid->op_private &= ~HINT_STRICT_REFS; |
| 8212 | return o; |
| 8213 | } |
| 8214 | |
| 8215 | OP * |
| 8216 | Perl_ck_shift(pTHX_ OP *o) |
| 8217 | { |
| 8218 | dVAR; |
| 8219 | const I32 type = o->op_type; |
| 8220 | |
| 8221 | PERL_ARGS_ASSERT_CK_SHIFT; |
| 8222 | |
| 8223 | if (!(o->op_flags & OPf_KIDS)) { |
| 8224 | OP *argop; |
| 8225 | |
| 8226 | if (!CvUNIQUE(PL_compcv)) { |
| 8227 | o->op_flags |= OPf_SPECIAL; |
| 8228 | return o; |
| 8229 | } |
| 8230 | |
| 8231 | argop = newUNOP(OP_RV2AV, 0, scalar(newGVOP(OP_GV, 0, PL_argvgv))); |
| 8232 | #ifdef PERL_MAD |
| 8233 | { |
| 8234 | OP * const oldo = o; |
| 8235 | o = newUNOP(type, 0, scalar(argop)); |
| 8236 | op_getmad(oldo,o,'O'); |
| 8237 | return o; |
| 8238 | } |
| 8239 | #else |
| 8240 | op_free(o); |
| 8241 | return newUNOP(type, 0, scalar(argop)); |
| 8242 | #endif |
| 8243 | } |
| 8244 | return scalar(modkids(ck_fun(o), type)); |
| 8245 | } |
| 8246 | |
| 8247 | OP * |
| 8248 | Perl_ck_sort(pTHX_ OP *o) |
| 8249 | { |
| 8250 | dVAR; |
| 8251 | OP *firstkid; |
| 8252 | |
| 8253 | PERL_ARGS_ASSERT_CK_SORT; |
| 8254 | |
| 8255 | if (o->op_type == OP_SORT && (PL_hints & HINT_LOCALIZE_HH) != 0) { |
| 8256 | HV * const hinthv = GvHV(PL_hintgv); |
| 8257 | if (hinthv) { |
| 8258 | SV ** const svp = hv_fetchs(hinthv, "sort", FALSE); |
| 8259 | if (svp) { |
| 8260 | const I32 sorthints = (I32)SvIV(*svp); |
| 8261 | if ((sorthints & HINT_SORT_QUICKSORT) != 0) |
| 8262 | o->op_private |= OPpSORT_QSORT; |
| 8263 | if ((sorthints & HINT_SORT_STABLE) != 0) |
| 8264 | o->op_private |= OPpSORT_STABLE; |
| 8265 | } |
| 8266 | } |
| 8267 | } |
| 8268 | |
| 8269 | if (o->op_type == OP_SORT && o->op_flags & OPf_STACKED) |
| 8270 | simplify_sort(o); |
| 8271 | firstkid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ |
| 8272 | if (o->op_flags & OPf_STACKED) { /* may have been cleared */ |
| 8273 | OP *k = NULL; |
| 8274 | OP *kid = cUNOPx(firstkid)->op_first; /* get past null */ |
| 8275 | |
| 8276 | if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) { |
| 8277 | LINKLIST(kid); |
| 8278 | if (kid->op_type == OP_SCOPE) { |
| 8279 | k = kid->op_next; |
| 8280 | kid->op_next = 0; |
| 8281 | } |
| 8282 | else if (kid->op_type == OP_LEAVE) { |
| 8283 | if (o->op_type == OP_SORT) { |
| 8284 | op_null(kid); /* wipe out leave */ |
| 8285 | kid->op_next = kid; |
| 8286 | |
| 8287 | for (k = kLISTOP->op_first->op_next; k; k = k->op_next) { |
| 8288 | if (k->op_next == kid) |
| 8289 | k->op_next = 0; |
| 8290 | /* don't descend into loops */ |
| 8291 | else if (k->op_type == OP_ENTERLOOP |
| 8292 | || k->op_type == OP_ENTERITER) |
| 8293 | { |
| 8294 | k = cLOOPx(k)->op_lastop; |
| 8295 | } |
| 8296 | } |
| 8297 | } |
| 8298 | else |
| 8299 | kid->op_next = 0; /* just disconnect the leave */ |
| 8300 | k = kLISTOP->op_first; |
| 8301 | } |
| 8302 | CALL_PEEP(k); |
| 8303 | |
| 8304 | kid = firstkid; |
| 8305 | if (o->op_type == OP_SORT) { |
| 8306 | /* provide scalar context for comparison function/block */ |
| 8307 | kid = scalar(kid); |
| 8308 | kid->op_next = kid; |
| 8309 | } |
| 8310 | else |
| 8311 | kid->op_next = k; |
| 8312 | o->op_flags |= OPf_SPECIAL; |
| 8313 | } |
| 8314 | else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV) |
| 8315 | op_null(firstkid); |
| 8316 | |
| 8317 | firstkid = firstkid->op_sibling; |
| 8318 | } |
| 8319 | |
| 8320 | /* provide list context for arguments */ |
| 8321 | if (o->op_type == OP_SORT) |
| 8322 | list(firstkid); |
| 8323 | |
| 8324 | return o; |
| 8325 | } |
| 8326 | |
| 8327 | STATIC void |
| 8328 | S_simplify_sort(pTHX_ OP *o) |
| 8329 | { |
| 8330 | dVAR; |
| 8331 | register OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */ |
| 8332 | OP *k; |
| 8333 | int descending; |
| 8334 | GV *gv; |
| 8335 | const char *gvname; |
| 8336 | |
| 8337 | PERL_ARGS_ASSERT_SIMPLIFY_SORT; |
| 8338 | |
| 8339 | if (!(o->op_flags & OPf_STACKED)) |
| 8340 | return; |
| 8341 | GvMULTI_on(gv_fetchpvs("a", GV_ADD|GV_NOTQUAL, SVt_PV)); |
| 8342 | GvMULTI_on(gv_fetchpvs("b", GV_ADD|GV_NOTQUAL, SVt_PV)); |
| 8343 | kid = kUNOP->op_first; /* get past null */ |
| 8344 | if (kid->op_type != OP_SCOPE) |
| 8345 | return; |
| 8346 | kid = kLISTOP->op_last; /* get past scope */ |
| 8347 | switch(kid->op_type) { |
| 8348 | case OP_NCMP: |
| 8349 | case OP_I_NCMP: |
| 8350 | case OP_SCMP: |
| 8351 | break; |
| 8352 | default: |
| 8353 | return; |
| 8354 | } |
| 8355 | k = kid; /* remember this node*/ |
| 8356 | if (kBINOP->op_first->op_type != OP_RV2SV) |
| 8357 | return; |
| 8358 | kid = kBINOP->op_first; /* get past cmp */ |
| 8359 | if (kUNOP->op_first->op_type != OP_GV) |
| 8360 | return; |
| 8361 | kid = kUNOP->op_first; /* get past rv2sv */ |
| 8362 | gv = kGVOP_gv; |
| 8363 | if (GvSTASH(gv) != PL_curstash) |
| 8364 | return; |
| 8365 | gvname = GvNAME(gv); |
| 8366 | if (*gvname == 'a' && gvname[1] == '\0') |
| 8367 | descending = 0; |
| 8368 | else if (*gvname == 'b' && gvname[1] == '\0') |
| 8369 | descending = 1; |
| 8370 | else |
| 8371 | return; |
| 8372 | |
| 8373 | kid = k; /* back to cmp */ |
| 8374 | if (kBINOP->op_last->op_type != OP_RV2SV) |
| 8375 | return; |
| 8376 | kid = kBINOP->op_last; /* down to 2nd arg */ |
| 8377 | if (kUNOP->op_first->op_type != OP_GV) |
| 8378 | return; |
| 8379 | kid = kUNOP->op_first; /* get past rv2sv */ |
| 8380 | gv = kGVOP_gv; |
| 8381 | if (GvSTASH(gv) != PL_curstash) |
| 8382 | return; |
| 8383 | gvname = GvNAME(gv); |
| 8384 | if ( descending |
| 8385 | ? !(*gvname == 'a' && gvname[1] == '\0') |
| 8386 | : !(*gvname == 'b' && gvname[1] == '\0')) |
| 8387 | return; |
| 8388 | o->op_flags &= ~(OPf_STACKED | OPf_SPECIAL); |
| 8389 | if (descending) |
| 8390 | o->op_private |= OPpSORT_DESCEND; |
| 8391 | if (k->op_type == OP_NCMP) |
| 8392 | o->op_private |= OPpSORT_NUMERIC; |
| 8393 | if (k->op_type == OP_I_NCMP) |
| 8394 | o->op_private |= OPpSORT_NUMERIC | OPpSORT_INTEGER; |
| 8395 | kid = cLISTOPo->op_first->op_sibling; |
| 8396 | cLISTOPo->op_first->op_sibling = kid->op_sibling; /* bypass old block */ |
| 8397 | #ifdef PERL_MAD |
| 8398 | op_getmad(kid,o,'S'); /* then delete it */ |
| 8399 | #else |
| 8400 | op_free(kid); /* then delete it */ |
| 8401 | #endif |
| 8402 | } |
| 8403 | |
| 8404 | OP * |
| 8405 | Perl_ck_split(pTHX_ OP *o) |
| 8406 | { |
| 8407 | dVAR; |
| 8408 | register OP *kid; |
| 8409 | |
| 8410 | PERL_ARGS_ASSERT_CK_SPLIT; |
| 8411 | |
| 8412 | if (o->op_flags & OPf_STACKED) |
| 8413 | return no_fh_allowed(o); |
| 8414 | |
| 8415 | kid = cLISTOPo->op_first; |
| 8416 | if (kid->op_type != OP_NULL) |
| 8417 | Perl_croak(aTHX_ "panic: ck_split"); |
| 8418 | kid = kid->op_sibling; |
| 8419 | op_free(cLISTOPo->op_first); |
| 8420 | cLISTOPo->op_first = kid; |
| 8421 | if (!kid) { |
| 8422 | cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpvs(" ")); |
| 8423 | cLISTOPo->op_last = kid; /* There was only one element previously */ |
| 8424 | } |
| 8425 | |
| 8426 | if (kid->op_type != OP_MATCH || kid->op_flags & OPf_STACKED) { |
| 8427 | OP * const sibl = kid->op_sibling; |
| 8428 | kid->op_sibling = 0; |
| 8429 | kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, 0); |
| 8430 | if (cLISTOPo->op_first == cLISTOPo->op_last) |
| 8431 | cLISTOPo->op_last = kid; |
| 8432 | cLISTOPo->op_first = kid; |
| 8433 | kid->op_sibling = sibl; |
| 8434 | } |
| 8435 | |
| 8436 | kid->op_type = OP_PUSHRE; |
| 8437 | kid->op_ppaddr = PL_ppaddr[OP_PUSHRE]; |
| 8438 | scalar(kid); |
| 8439 | if (((PMOP *)kid)->op_pmflags & PMf_GLOBAL) { |
| 8440 | Perl_ck_warner(aTHX_ packWARN(WARN_REGEXP), |
| 8441 | "Use of /g modifier is meaningless in split"); |
| 8442 | } |
| 8443 | |
| 8444 | if (!kid->op_sibling) |
| 8445 | op_append_elem(OP_SPLIT, o, newDEFSVOP()); |
| 8446 | |
| 8447 | kid = kid->op_sibling; |
| 8448 | scalar(kid); |
| 8449 | |
| 8450 | if (!kid->op_sibling) |
| 8451 | op_append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0))); |
| 8452 | assert(kid->op_sibling); |
| 8453 | |
| 8454 | kid = kid->op_sibling; |
| 8455 | scalar(kid); |
| 8456 | |
| 8457 | if (kid->op_sibling) |
| 8458 | return too_many_arguments(o,OP_DESC(o)); |
| 8459 | |
| 8460 | return o; |
| 8461 | } |
| 8462 | |
| 8463 | OP * |
| 8464 | Perl_ck_join(pTHX_ OP *o) |
| 8465 | { |
| 8466 | const OP * const kid = cLISTOPo->op_first->op_sibling; |
| 8467 | |
| 8468 | PERL_ARGS_ASSERT_CK_JOIN; |
| 8469 | |
| 8470 | if (kid && kid->op_type == OP_MATCH) { |
| 8471 | if (ckWARN(WARN_SYNTAX)) { |
| 8472 | const REGEXP *re = PM_GETRE(kPMOP); |
| 8473 | const char *pmstr = re ? RX_PRECOMP_const(re) : "STRING"; |
| 8474 | const STRLEN len = re ? RX_PRELEN(re) : 6; |
| 8475 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), |
| 8476 | "/%.*s/ should probably be written as \"%.*s\"", |
| 8477 | (int)len, pmstr, (int)len, pmstr); |
| 8478 | } |
| 8479 | } |
| 8480 | return ck_fun(o); |
| 8481 | } |
| 8482 | |
| 8483 | /* |
| 8484 | =for apidoc Am|CV *|rv2cv_op_cv|OP *cvop|U32 flags |
| 8485 | |
| 8486 | Examines an op, which is expected to identify a subroutine at runtime, |
| 8487 | and attempts to determine at compile time which subroutine it identifies. |
| 8488 | This is normally used during Perl compilation to determine whether |
| 8489 | a prototype can be applied to a function call. I<cvop> is the op |
| 8490 | being considered, normally an C<rv2cv> op. A pointer to the identified |
| 8491 | subroutine is returned, if it could be determined statically, and a null |
| 8492 | pointer is returned if it was not possible to determine statically. |
| 8493 | |
| 8494 | Currently, the subroutine can be identified statically if the RV that the |
| 8495 | C<rv2cv> is to operate on is provided by a suitable C<gv> or C<const> op. |
| 8496 | A C<gv> op is suitable if the GV's CV slot is populated. A C<const> op is |
| 8497 | suitable if the constant value must be an RV pointing to a CV. Details of |
| 8498 | this process may change in future versions of Perl. If the C<rv2cv> op |
| 8499 | has the C<OPpENTERSUB_AMPER> flag set then no attempt is made to identify |
| 8500 | the subroutine statically: this flag is used to suppress compile-time |
| 8501 | magic on a subroutine call, forcing it to use default runtime behaviour. |
| 8502 | |
| 8503 | If I<flags> has the bit C<RV2CVOPCV_MARK_EARLY> set, then the handling |
| 8504 | of a GV reference is modified. If a GV was examined and its CV slot was |
| 8505 | found to be empty, then the C<gv> op has the C<OPpEARLY_CV> flag set. |
| 8506 | If the op is not optimised away, and the CV slot is later populated with |
| 8507 | a subroutine having a prototype, that flag eventually triggers the warning |
| 8508 | "called too early to check prototype". |
| 8509 | |
| 8510 | If I<flags> has the bit C<RV2CVOPCV_RETURN_NAME_GV> set, then instead |
| 8511 | of returning a pointer to the subroutine it returns a pointer to the |
| 8512 | GV giving the most appropriate name for the subroutine in this context. |
| 8513 | Normally this is just the C<CvGV> of the subroutine, but for an anonymous |
| 8514 | (C<CvANON>) subroutine that is referenced through a GV it will be the |
| 8515 | referencing GV. The resulting C<GV*> is cast to C<CV*> to be returned. |
| 8516 | A null pointer is returned as usual if there is no statically-determinable |
| 8517 | subroutine. |
| 8518 | |
| 8519 | =cut |
| 8520 | */ |
| 8521 | |
| 8522 | CV * |
| 8523 | Perl_rv2cv_op_cv(pTHX_ OP *cvop, U32 flags) |
| 8524 | { |
| 8525 | OP *rvop; |
| 8526 | CV *cv; |
| 8527 | GV *gv; |
| 8528 | PERL_ARGS_ASSERT_RV2CV_OP_CV; |
| 8529 | if (flags & ~(RV2CVOPCV_MARK_EARLY|RV2CVOPCV_RETURN_NAME_GV)) |
| 8530 | Perl_croak(aTHX_ "panic: rv2cv_op_cv bad flags %x", (unsigned)flags); |
| 8531 | if (cvop->op_type != OP_RV2CV) |
| 8532 | return NULL; |
| 8533 | if (cvop->op_private & OPpENTERSUB_AMPER) |
| 8534 | return NULL; |
| 8535 | if (!(cvop->op_flags & OPf_KIDS)) |
| 8536 | return NULL; |
| 8537 | rvop = cUNOPx(cvop)->op_first; |
| 8538 | switch (rvop->op_type) { |
| 8539 | case OP_GV: { |
| 8540 | gv = cGVOPx_gv(rvop); |
| 8541 | cv = GvCVu(gv); |
| 8542 | if (!cv) { |
| 8543 | if (flags & RV2CVOPCV_MARK_EARLY) |
| 8544 | rvop->op_private |= OPpEARLY_CV; |
| 8545 | return NULL; |
| 8546 | } |
| 8547 | } break; |
| 8548 | case OP_CONST: { |
| 8549 | SV *rv = cSVOPx_sv(rvop); |
| 8550 | if (!SvROK(rv)) |
| 8551 | return NULL; |
| 8552 | cv = (CV*)SvRV(rv); |
| 8553 | gv = NULL; |
| 8554 | } break; |
| 8555 | default: { |
| 8556 | return NULL; |
| 8557 | } break; |
| 8558 | } |
| 8559 | if (SvTYPE((SV*)cv) != SVt_PVCV) |
| 8560 | return NULL; |
| 8561 | if (flags & RV2CVOPCV_RETURN_NAME_GV) { |
| 8562 | if (!CvANON(cv) || !gv) |
| 8563 | gv = CvGV(cv); |
| 8564 | return (CV*)gv; |
| 8565 | } else { |
| 8566 | return cv; |
| 8567 | } |
| 8568 | } |
| 8569 | |
| 8570 | /* |
| 8571 | =for apidoc Am|OP *|ck_entersub_args_list|OP *entersubop |
| 8572 | |
| 8573 | Performs the default fixup of the arguments part of an C<entersub> |
| 8574 | op tree. This consists of applying list context to each of the |
| 8575 | argument ops. This is the standard treatment used on a call marked |
| 8576 | with C<&>, or a method call, or a call through a subroutine reference, |
| 8577 | or any other call where the callee can't be identified at compile time, |
| 8578 | or a call where the callee has no prototype. |
| 8579 | |
| 8580 | =cut |
| 8581 | */ |
| 8582 | |
| 8583 | OP * |
| 8584 | Perl_ck_entersub_args_list(pTHX_ OP *entersubop) |
| 8585 | { |
| 8586 | OP *aop; |
| 8587 | PERL_ARGS_ASSERT_CK_ENTERSUB_ARGS_LIST; |
| 8588 | aop = cUNOPx(entersubop)->op_first; |
| 8589 | if (!aop->op_sibling) |
| 8590 | aop = cUNOPx(aop)->op_first; |
| 8591 | for (aop = aop->op_sibling; aop->op_sibling; aop = aop->op_sibling) { |
| 8592 | if (!(PL_madskills && aop->op_type == OP_STUB)) { |
| 8593 | list(aop); |
| 8594 | mod(aop, OP_ENTERSUB); |
| 8595 | } |
| 8596 | } |
| 8597 | return entersubop; |
| 8598 | } |
| 8599 | |
| 8600 | /* |
| 8601 | =for apidoc Am|OP *|ck_entersub_args_proto|OP *entersubop|GV *namegv|SV *protosv |
| 8602 | |
| 8603 | Performs the fixup of the arguments part of an C<entersub> op tree |
| 8604 | based on a subroutine prototype. This makes various modifications to |
| 8605 | the argument ops, from applying context up to inserting C<refgen> ops, |
| 8606 | and checking the number and syntactic types of arguments, as directed by |
| 8607 | the prototype. This is the standard treatment used on a subroutine call, |
| 8608 | not marked with C<&>, where the callee can be identified at compile time |
| 8609 | and has a prototype. |
| 8610 | |
| 8611 | I<protosv> supplies the subroutine prototype to be applied to the call. |
| 8612 | It may be a normal defined scalar, of which the string value will be used. |
| 8613 | Alternatively, for convenience, it may be a subroutine object (a C<CV*> |
| 8614 | that has been cast to C<SV*>) which has a prototype. The prototype |
| 8615 | supplied, in whichever form, does not need to match the actual callee |
| 8616 | referenced by the op tree. |
| 8617 | |
| 8618 | If the argument ops disagree with the prototype, for example by having |
| 8619 | an unacceptable number of arguments, a valid op tree is returned anyway. |
| 8620 | The error is reflected in the parser state, normally resulting in a single |
| 8621 | exception at the top level of parsing which covers all the compilation |
| 8622 | errors that occurred. In the error message, the callee is referred to |
| 8623 | by the name defined by the I<namegv> parameter. |
| 8624 | |
| 8625 | =cut |
| 8626 | */ |
| 8627 | |
| 8628 | OP * |
| 8629 | Perl_ck_entersub_args_proto(pTHX_ OP *entersubop, GV *namegv, SV *protosv) |
| 8630 | { |
| 8631 | STRLEN proto_len; |
| 8632 | const char *proto, *proto_end; |
| 8633 | OP *aop, *prev, *cvop; |
| 8634 | int optional = 0; |
| 8635 | I32 arg = 0; |
| 8636 | I32 contextclass = 0; |
| 8637 | const char *e = NULL; |
| 8638 | PERL_ARGS_ASSERT_CK_ENTERSUB_ARGS_PROTO; |
| 8639 | if (SvTYPE(protosv) == SVt_PVCV ? !SvPOK(protosv) : !SvOK(protosv)) |
| 8640 | Perl_croak(aTHX_ "panic: ck_entersub_args_proto CV with no proto"); |
| 8641 | proto = SvPV(protosv, proto_len); |
| 8642 | proto_end = proto + proto_len; |
| 8643 | aop = cUNOPx(entersubop)->op_first; |
| 8644 | if (!aop->op_sibling) |
| 8645 | aop = cUNOPx(aop)->op_first; |
| 8646 | prev = aop; |
| 8647 | aop = aop->op_sibling; |
| 8648 | for (cvop = aop; cvop->op_sibling; cvop = cvop->op_sibling) ; |
| 8649 | while (aop != cvop) { |
| 8650 | OP* o3; |
| 8651 | if (PL_madskills && aop->op_type == OP_STUB) { |
| 8652 | aop = aop->op_sibling; |
| 8653 | continue; |
| 8654 | } |
| 8655 | if (PL_madskills && aop->op_type == OP_NULL) |
| 8656 | o3 = ((UNOP*)aop)->op_first; |
| 8657 | else |
| 8658 | o3 = aop; |
| 8659 | |
| 8660 | if (proto >= proto_end) |
| 8661 | return too_many_arguments(entersubop, gv_ename(namegv)); |
| 8662 | |
| 8663 | switch (*proto) { |
| 8664 | case ';': |
| 8665 | optional = 1; |
| 8666 | proto++; |
| 8667 | continue; |
| 8668 | case '_': |
| 8669 | /* _ must be at the end */ |
| 8670 | if (proto[1] && proto[1] != ';') |
| 8671 | goto oops; |
| 8672 | case '$': |
| 8673 | proto++; |
| 8674 | arg++; |
| 8675 | scalar(aop); |
| 8676 | break; |
| 8677 | case '%': |
| 8678 | case '@': |
| 8679 | list(aop); |
| 8680 | arg++; |
| 8681 | break; |
| 8682 | case '&': |
| 8683 | proto++; |
| 8684 | arg++; |
| 8685 | if (o3->op_type != OP_REFGEN && o3->op_type != OP_UNDEF) |
| 8686 | bad_type(arg, |
| 8687 | arg == 1 ? "block or sub {}" : "sub {}", |
| 8688 | gv_ename(namegv), o3); |
| 8689 | break; |
| 8690 | case '*': |
| 8691 | /* '*' allows any scalar type, including bareword */ |
| 8692 | proto++; |
| 8693 | arg++; |
| 8694 | if (o3->op_type == OP_RV2GV) |
| 8695 | goto wrapref; /* autoconvert GLOB -> GLOBref */ |
| 8696 | else if (o3->op_type == OP_CONST) |
| 8697 | o3->op_private &= ~OPpCONST_STRICT; |
| 8698 | else if (o3->op_type == OP_ENTERSUB) { |
| 8699 | /* accidental subroutine, revert to bareword */ |
| 8700 | OP *gvop = ((UNOP*)o3)->op_first; |
| 8701 | if (gvop && gvop->op_type == OP_NULL) { |
| 8702 | gvop = ((UNOP*)gvop)->op_first; |
| 8703 | if (gvop) { |
| 8704 | for (; gvop->op_sibling; gvop = gvop->op_sibling) |
| 8705 | ; |
| 8706 | if (gvop && |
| 8707 | (gvop->op_private & OPpENTERSUB_NOPAREN) && |
| 8708 | (gvop = ((UNOP*)gvop)->op_first) && |
| 8709 | gvop->op_type == OP_GV) |
| 8710 | { |
| 8711 | GV * const gv = cGVOPx_gv(gvop); |
| 8712 | OP * const sibling = aop->op_sibling; |
| 8713 | SV * const n = newSVpvs(""); |
| 8714 | #ifdef PERL_MAD |
| 8715 | OP * const oldaop = aop; |
| 8716 | #else |
| 8717 | op_free(aop); |
| 8718 | #endif |
| 8719 | gv_fullname4(n, gv, "", FALSE); |
| 8720 | aop = newSVOP(OP_CONST, 0, n); |
| 8721 | op_getmad(oldaop,aop,'O'); |
| 8722 | prev->op_sibling = aop; |
| 8723 | aop->op_sibling = sibling; |
| 8724 | } |
| 8725 | } |
| 8726 | } |
| 8727 | } |
| 8728 | scalar(aop); |
| 8729 | break; |
| 8730 | case '[': case ']': |
| 8731 | goto oops; |
| 8732 | break; |
| 8733 | case '\\': |
| 8734 | proto++; |
| 8735 | arg++; |
| 8736 | again: |
| 8737 | switch (*proto++) { |
| 8738 | case '[': |
| 8739 | if (contextclass++ == 0) { |
| 8740 | e = strchr(proto, ']'); |
| 8741 | if (!e || e == proto) |
| 8742 | goto oops; |
| 8743 | } |
| 8744 | else |
| 8745 | goto oops; |
| 8746 | goto again; |
| 8747 | break; |
| 8748 | case ']': |
| 8749 | if (contextclass) { |
| 8750 | const char *p = proto; |
| 8751 | const char *const end = proto; |
| 8752 | contextclass = 0; |
| 8753 | while (*--p != '[') {} |
| 8754 | bad_type(arg, Perl_form(aTHX_ "one of %.*s", |
| 8755 | (int)(end - p), p), |
| 8756 | gv_ename(namegv), o3); |
| 8757 | } else |
| 8758 | goto oops; |
| 8759 | break; |
| 8760 | case '*': |
| 8761 | if (o3->op_type == OP_RV2GV) |
| 8762 | goto wrapref; |
| 8763 | if (!contextclass) |
| 8764 | bad_type(arg, "symbol", gv_ename(namegv), o3); |
| 8765 | break; |
| 8766 | case '&': |
| 8767 | if (o3->op_type == OP_ENTERSUB) |
| 8768 | goto wrapref; |
| 8769 | if (!contextclass) |
| 8770 | bad_type(arg, "subroutine entry", gv_ename(namegv), |
| 8771 | o3); |
| 8772 | break; |
| 8773 | case '$': |
| 8774 | if (o3->op_type == OP_RV2SV || |
| 8775 | o3->op_type == OP_PADSV || |
| 8776 | o3->op_type == OP_HELEM || |
| 8777 | o3->op_type == OP_AELEM) |
| 8778 | goto wrapref; |
| 8779 | if (!contextclass) |
| 8780 | bad_type(arg, "scalar", gv_ename(namegv), o3); |
| 8781 | break; |
| 8782 | case '@': |
| 8783 | if (o3->op_type == OP_RV2AV || |
| 8784 | o3->op_type == OP_PADAV) |
| 8785 | goto wrapref; |
| 8786 | if (!contextclass) |
| 8787 | bad_type(arg, "array", gv_ename(namegv), o3); |
| 8788 | break; |
| 8789 | case '%': |
| 8790 | if (o3->op_type == OP_RV2HV || |
| 8791 | o3->op_type == OP_PADHV) |
| 8792 | goto wrapref; |
| 8793 | if (!contextclass) |
| 8794 | bad_type(arg, "hash", gv_ename(namegv), o3); |
| 8795 | break; |
| 8796 | wrapref: |
| 8797 | { |
| 8798 | OP* const kid = aop; |
| 8799 | OP* const sib = kid->op_sibling; |
| 8800 | kid->op_sibling = 0; |
| 8801 | aop = newUNOP(OP_REFGEN, 0, kid); |
| 8802 | aop->op_sibling = sib; |
| 8803 | prev->op_sibling = aop; |
| 8804 | } |
| 8805 | if (contextclass && e) { |
| 8806 | proto = e + 1; |
| 8807 | contextclass = 0; |
| 8808 | } |
| 8809 | break; |
| 8810 | default: goto oops; |
| 8811 | } |
| 8812 | if (contextclass) |
| 8813 | goto again; |
| 8814 | break; |
| 8815 | case ' ': |
| 8816 | proto++; |
| 8817 | continue; |
| 8818 | default: |
| 8819 | oops: |
| 8820 | Perl_croak(aTHX_ "Malformed prototype for %s: %"SVf, |
| 8821 | gv_ename(namegv), SVfARG(protosv)); |
| 8822 | } |
| 8823 | |
| 8824 | mod(aop, OP_ENTERSUB); |
| 8825 | prev = aop; |
| 8826 | aop = aop->op_sibling; |
| 8827 | } |
| 8828 | if (aop == cvop && *proto == '_') { |
| 8829 | /* generate an access to $_ */ |
| 8830 | aop = newDEFSVOP(); |
| 8831 | aop->op_sibling = prev->op_sibling; |
| 8832 | prev->op_sibling = aop; /* instead of cvop */ |
| 8833 | } |
| 8834 | if (!optional && proto_end > proto && |
| 8835 | (*proto != '@' && *proto != '%' && *proto != ';' && *proto != '_')) |
| 8836 | return too_few_arguments(entersubop, gv_ename(namegv)); |
| 8837 | return entersubop; |
| 8838 | } |
| 8839 | |
| 8840 | /* |
| 8841 | =for apidoc Am|OP *|ck_entersub_args_proto_or_list|OP *entersubop|GV *namegv|SV *protosv |
| 8842 | |
| 8843 | Performs the fixup of the arguments part of an C<entersub> op tree either |
| 8844 | based on a subroutine prototype or using default list-context processing. |
| 8845 | This is the standard treatment used on a subroutine call, not marked |
| 8846 | with C<&>, where the callee can be identified at compile time. |
| 8847 | |
| 8848 | I<protosv> supplies the subroutine prototype to be applied to the call, |
| 8849 | or indicates that there is no prototype. It may be a normal scalar, |
| 8850 | in which case if it is defined then the string value will be used |
| 8851 | as a prototype, and if it is undefined then there is no prototype. |
| 8852 | Alternatively, for convenience, it may be a subroutine object (a C<CV*> |
| 8853 | that has been cast to C<SV*>), of which the prototype will be used if it |
| 8854 | has one. The prototype (or lack thereof) supplied, in whichever form, |
| 8855 | does not need to match the actual callee referenced by the op tree. |
| 8856 | |
| 8857 | If the argument ops disagree with the prototype, for example by having |
| 8858 | an unacceptable number of arguments, a valid op tree is returned anyway. |
| 8859 | The error is reflected in the parser state, normally resulting in a single |
| 8860 | exception at the top level of parsing which covers all the compilation |
| 8861 | errors that occurred. In the error message, the callee is referred to |
| 8862 | by the name defined by the I<namegv> parameter. |
| 8863 | |
| 8864 | =cut |
| 8865 | */ |
| 8866 | |
| 8867 | OP * |
| 8868 | Perl_ck_entersub_args_proto_or_list(pTHX_ OP *entersubop, |
| 8869 | GV *namegv, SV *protosv) |
| 8870 | { |
| 8871 | PERL_ARGS_ASSERT_CK_ENTERSUB_ARGS_PROTO_OR_LIST; |
| 8872 | if (SvTYPE(protosv) == SVt_PVCV ? SvPOK(protosv) : SvOK(protosv)) |
| 8873 | return ck_entersub_args_proto(entersubop, namegv, protosv); |
| 8874 | else |
| 8875 | return ck_entersub_args_list(entersubop); |
| 8876 | } |
| 8877 | |
| 8878 | /* |
| 8879 | =for apidoc Am|void|cv_get_call_checker|CV *cv|Perl_call_checker *ckfun_p|SV **ckobj_p |
| 8880 | |
| 8881 | Retrieves the function that will be used to fix up a call to I<cv>. |
| 8882 | Specifically, the function is applied to an C<entersub> op tree for a |
| 8883 | subroutine call, not marked with C<&>, where the callee can be identified |
| 8884 | at compile time as I<cv>. |
| 8885 | |
| 8886 | The C-level function pointer is returned in I<*ckfun_p>, and an SV |
| 8887 | argument for it is returned in I<*ckobj_p>. The function is intended |
| 8888 | to be called in this manner: |
| 8889 | |
| 8890 | entersubop = (*ckfun_p)(aTHX_ entersubop, namegv, (*ckobj_p)); |
| 8891 | |
| 8892 | In this call, I<entersubop> is a pointer to the C<entersub> op, |
| 8893 | which may be replaced by the check function, and I<namegv> is a GV |
| 8894 | supplying the name that should be used by the check function to refer |
| 8895 | to the callee of the C<entersub> op if it needs to emit any diagnostics. |
| 8896 | It is permitted to apply the check function in non-standard situations, |
| 8897 | such as to a call to a different subroutine or to a method call. |
| 8898 | |
| 8899 | By default, the function is |
| 8900 | L<Perl_ck_entersub_args_proto_or_list|/ck_entersub_args_proto_or_list>, |
| 8901 | and the SV parameter is I<cv> itself. This implements standard |
| 8902 | prototype processing. It can be changed, for a particular subroutine, |
| 8903 | by L</cv_set_call_checker>. |
| 8904 | |
| 8905 | =cut |
| 8906 | */ |
| 8907 | |
| 8908 | void |
| 8909 | Perl_cv_get_call_checker(pTHX_ CV *cv, Perl_call_checker *ckfun_p, SV **ckobj_p) |
| 8910 | { |
| 8911 | MAGIC *callmg; |
| 8912 | PERL_ARGS_ASSERT_CV_GET_CALL_CHECKER; |
| 8913 | callmg = SvMAGICAL((SV*)cv) ? mg_find((SV*)cv, PERL_MAGIC_checkcall) : NULL; |
| 8914 | if (callmg) { |
| 8915 | *ckfun_p = DPTR2FPTR(Perl_call_checker, callmg->mg_ptr); |
| 8916 | *ckobj_p = callmg->mg_obj; |
| 8917 | } else { |
| 8918 | *ckfun_p = Perl_ck_entersub_args_proto_or_list; |
| 8919 | *ckobj_p = (SV*)cv; |
| 8920 | } |
| 8921 | } |
| 8922 | |
| 8923 | /* |
| 8924 | =for apidoc Am|void|cv_set_call_checker|CV *cv|Perl_call_checker ckfun|SV *ckobj |
| 8925 | |
| 8926 | Sets the function that will be used to fix up a call to I<cv>. |
| 8927 | Specifically, the function is applied to an C<entersub> op tree for a |
| 8928 | subroutine call, not marked with C<&>, where the callee can be identified |
| 8929 | at compile time as I<cv>. |
| 8930 | |
| 8931 | The C-level function pointer is supplied in I<ckfun>, and an SV argument |
| 8932 | for it is supplied in I<ckobj>. The function is intended to be called |
| 8933 | in this manner: |
| 8934 | |
| 8935 | entersubop = ckfun(aTHX_ entersubop, namegv, ckobj); |
| 8936 | |
| 8937 | In this call, I<entersubop> is a pointer to the C<entersub> op, |
| 8938 | which may be replaced by the check function, and I<namegv> is a GV |
| 8939 | supplying the name that should be used by the check function to refer |
| 8940 | to the callee of the C<entersub> op if it needs to emit any diagnostics. |
| 8941 | It is permitted to apply the check function in non-standard situations, |
| 8942 | such as to a call to a different subroutine or to a method call. |
| 8943 | |
| 8944 | The current setting for a particular CV can be retrieved by |
| 8945 | L</cv_get_call_checker>. |
| 8946 | |
| 8947 | =cut |
| 8948 | */ |
| 8949 | |
| 8950 | void |
| 8951 | Perl_cv_set_call_checker(pTHX_ CV *cv, Perl_call_checker ckfun, SV *ckobj) |
| 8952 | { |
| 8953 | PERL_ARGS_ASSERT_CV_SET_CALL_CHECKER; |
| 8954 | if (ckfun == Perl_ck_entersub_args_proto_or_list && ckobj == (SV*)cv) { |
| 8955 | if (SvMAGICAL((SV*)cv)) |
| 8956 | mg_free_type((SV*)cv, PERL_MAGIC_checkcall); |
| 8957 | } else { |
| 8958 | MAGIC *callmg; |
| 8959 | sv_magic((SV*)cv, &PL_sv_undef, PERL_MAGIC_checkcall, NULL, 0); |
| 8960 | callmg = mg_find((SV*)cv, PERL_MAGIC_checkcall); |
| 8961 | if (callmg->mg_flags & MGf_REFCOUNTED) { |
| 8962 | SvREFCNT_dec(callmg->mg_obj); |
| 8963 | callmg->mg_flags &= ~MGf_REFCOUNTED; |
| 8964 | } |
| 8965 | callmg->mg_ptr = FPTR2DPTR(char *, ckfun); |
| 8966 | callmg->mg_obj = ckobj; |
| 8967 | if (ckobj != (SV*)cv) { |
| 8968 | SvREFCNT_inc_simple_void_NN(ckobj); |
| 8969 | callmg->mg_flags |= MGf_REFCOUNTED; |
| 8970 | } |
| 8971 | } |
| 8972 | } |
| 8973 | |
| 8974 | OP * |
| 8975 | Perl_ck_subr(pTHX_ OP *o) |
| 8976 | { |
| 8977 | OP *aop, *cvop; |
| 8978 | CV *cv; |
| 8979 | GV *namegv; |
| 8980 | |
| 8981 | PERL_ARGS_ASSERT_CK_SUBR; |
| 8982 | |
| 8983 | aop = cUNOPx(o)->op_first; |
| 8984 | if (!aop->op_sibling) |
| 8985 | aop = cUNOPx(aop)->op_first; |
| 8986 | aop = aop->op_sibling; |
| 8987 | for (cvop = aop; cvop->op_sibling; cvop = cvop->op_sibling) ; |
| 8988 | cv = rv2cv_op_cv(cvop, RV2CVOPCV_MARK_EARLY); |
| 8989 | namegv = cv ? (GV*)rv2cv_op_cv(cvop, RV2CVOPCV_RETURN_NAME_GV) : NULL; |
| 8990 | |
| 8991 | o->op_private |= OPpENTERSUB_HASTARG; |
| 8992 | o->op_private |= (PL_hints & HINT_STRICT_REFS); |
| 8993 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
| 8994 | o->op_private |= OPpENTERSUB_DB; |
| 8995 | if (cvop->op_type == OP_RV2CV) { |
| 8996 | o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER); |
| 8997 | op_null(cvop); |
| 8998 | } else if (cvop->op_type == OP_METHOD || cvop->op_type == OP_METHOD_NAMED) { |
| 8999 | if (aop->op_type == OP_CONST) |
| 9000 | aop->op_private &= ~OPpCONST_STRICT; |
| 9001 | else if (aop->op_type == OP_LIST) { |
| 9002 | OP * const sib = ((UNOP*)aop)->op_first->op_sibling; |
| 9003 | if (sib && sib->op_type == OP_CONST) |
| 9004 | sib->op_private &= ~OPpCONST_STRICT; |
| 9005 | } |
| 9006 | } |
| 9007 | |
| 9008 | if (!cv) { |
| 9009 | return ck_entersub_args_list(o); |
| 9010 | } else { |
| 9011 | Perl_call_checker ckfun; |
| 9012 | SV *ckobj; |
| 9013 | cv_get_call_checker(cv, &ckfun, &ckobj); |
| 9014 | return ckfun(aTHX_ o, namegv, ckobj); |
| 9015 | } |
| 9016 | } |
| 9017 | |
| 9018 | OP * |
| 9019 | Perl_ck_svconst(pTHX_ OP *o) |
| 9020 | { |
| 9021 | PERL_ARGS_ASSERT_CK_SVCONST; |
| 9022 | PERL_UNUSED_CONTEXT; |
| 9023 | SvREADONLY_on(cSVOPo->op_sv); |
| 9024 | return o; |
| 9025 | } |
| 9026 | |
| 9027 | OP * |
| 9028 | Perl_ck_chdir(pTHX_ OP *o) |
| 9029 | { |
| 9030 | PERL_ARGS_ASSERT_CK_CHDIR; |
| 9031 | if (o->op_flags & OPf_KIDS) { |
| 9032 | SVOP * const kid = (SVOP*)cUNOPo->op_first; |
| 9033 | |
| 9034 | if (kid && kid->op_type == OP_CONST && |
| 9035 | (kid->op_private & OPpCONST_BARE)) |
| 9036 | { |
| 9037 | o->op_flags |= OPf_SPECIAL; |
| 9038 | kid->op_private &= ~OPpCONST_STRICT; |
| 9039 | } |
| 9040 | } |
| 9041 | return ck_fun(o); |
| 9042 | } |
| 9043 | |
| 9044 | OP * |
| 9045 | Perl_ck_trunc(pTHX_ OP *o) |
| 9046 | { |
| 9047 | PERL_ARGS_ASSERT_CK_TRUNC; |
| 9048 | |
| 9049 | if (o->op_flags & OPf_KIDS) { |
| 9050 | SVOP *kid = (SVOP*)cUNOPo->op_first; |
| 9051 | |
| 9052 | if (kid->op_type == OP_NULL) |
| 9053 | kid = (SVOP*)kid->op_sibling; |
| 9054 | if (kid && kid->op_type == OP_CONST && |
| 9055 | (kid->op_private & OPpCONST_BARE)) |
| 9056 | { |
| 9057 | o->op_flags |= OPf_SPECIAL; |
| 9058 | kid->op_private &= ~OPpCONST_STRICT; |
| 9059 | } |
| 9060 | } |
| 9061 | return ck_fun(o); |
| 9062 | } |
| 9063 | |
| 9064 | OP * |
| 9065 | Perl_ck_unpack(pTHX_ OP *o) |
| 9066 | { |
| 9067 | OP *kid = cLISTOPo->op_first; |
| 9068 | |
| 9069 | PERL_ARGS_ASSERT_CK_UNPACK; |
| 9070 | |
| 9071 | if (kid->op_sibling) { |
| 9072 | kid = kid->op_sibling; |
| 9073 | if (!kid->op_sibling) |
| 9074 | kid->op_sibling = newDEFSVOP(); |
| 9075 | } |
| 9076 | return ck_fun(o); |
| 9077 | } |
| 9078 | |
| 9079 | OP * |
| 9080 | Perl_ck_substr(pTHX_ OP *o) |
| 9081 | { |
| 9082 | PERL_ARGS_ASSERT_CK_SUBSTR; |
| 9083 | |
| 9084 | o = ck_fun(o); |
| 9085 | if ((o->op_flags & OPf_KIDS) && (o->op_private == 4)) { |
| 9086 | OP *kid = cLISTOPo->op_first; |
| 9087 | |
| 9088 | if (kid->op_type == OP_NULL) |
| 9089 | kid = kid->op_sibling; |
| 9090 | if (kid) |
| 9091 | kid->op_flags |= OPf_MOD; |
| 9092 | |
| 9093 | } |
| 9094 | return o; |
| 9095 | } |
| 9096 | |
| 9097 | OP * |
| 9098 | Perl_ck_each(pTHX_ OP *o) |
| 9099 | { |
| 9100 | dVAR; |
| 9101 | OP *kid = o->op_flags & OPf_KIDS ? cLISTOPo->op_first : NULL; |
| 9102 | |
| 9103 | PERL_ARGS_ASSERT_CK_EACH; |
| 9104 | |
| 9105 | if (kid) { |
| 9106 | if (kid->op_type == OP_PADAV || kid->op_type == OP_RV2AV) { |
| 9107 | const unsigned new_type = o->op_type == OP_EACH ? OP_AEACH |
| 9108 | : o->op_type == OP_KEYS ? OP_AKEYS : OP_AVALUES; |
| 9109 | o->op_type = new_type; |
| 9110 | o->op_ppaddr = PL_ppaddr[new_type]; |
| 9111 | } |
| 9112 | else if (!(kid->op_type == OP_PADHV || kid->op_type == OP_RV2HV |
| 9113 | || (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) |
| 9114 | )) { |
| 9115 | bad_type(1, "hash or array", PL_op_desc[o->op_type], kid); |
| 9116 | return o; |
| 9117 | } |
| 9118 | } |
| 9119 | return ck_fun(o); |
| 9120 | } |
| 9121 | |
| 9122 | /* caller is supposed to assign the return to the |
| 9123 | container of the rep_op var */ |
| 9124 | STATIC OP * |
| 9125 | S_opt_scalarhv(pTHX_ OP *rep_op) { |
| 9126 | dVAR; |
| 9127 | UNOP *unop; |
| 9128 | |
| 9129 | PERL_ARGS_ASSERT_OPT_SCALARHV; |
| 9130 | |
| 9131 | NewOp(1101, unop, 1, UNOP); |
| 9132 | unop->op_type = (OPCODE)OP_BOOLKEYS; |
| 9133 | unop->op_ppaddr = PL_ppaddr[OP_BOOLKEYS]; |
| 9134 | unop->op_flags = (U8)(OPf_WANT_SCALAR | OPf_KIDS ); |
| 9135 | unop->op_private = (U8)(1 | ((OPf_WANT_SCALAR | OPf_KIDS) >> 8)); |
| 9136 | unop->op_first = rep_op; |
| 9137 | unop->op_next = rep_op->op_next; |
| 9138 | rep_op->op_next = (OP*)unop; |
| 9139 | rep_op->op_flags|=(OPf_REF | OPf_MOD); |
| 9140 | unop->op_sibling = rep_op->op_sibling; |
| 9141 | rep_op->op_sibling = NULL; |
| 9142 | /* unop->op_targ = pad_alloc(OP_BOOLKEYS, SVs_PADTMP); */ |
| 9143 | if (rep_op->op_type == OP_PADHV) { |
| 9144 | rep_op->op_flags &= ~OPf_WANT_SCALAR; |
| 9145 | rep_op->op_flags |= OPf_WANT_LIST; |
| 9146 | } |
| 9147 | return (OP*)unop; |
| 9148 | } |
| 9149 | |
| 9150 | /* Checks if o acts as an in-place operator on an array. oright points to the |
| 9151 | * beginning of the right-hand side. Returns the left-hand side of the |
| 9152 | * assignment if o acts in-place, or NULL otherwise. */ |
| 9153 | |
| 9154 | STATIC OP * |
| 9155 | S_is_inplace_av(pTHX_ OP *o, OP *oright) { |
| 9156 | OP *o2; |
| 9157 | OP *oleft = NULL; |
| 9158 | |
| 9159 | PERL_ARGS_ASSERT_IS_INPLACE_AV; |
| 9160 | |
| 9161 | if (!oright || |
| 9162 | (oright->op_type != OP_RV2AV && oright->op_type != OP_PADAV) |
| 9163 | || oright->op_next != o |
| 9164 | || (oright->op_private & OPpLVAL_INTRO) |
| 9165 | ) |
| 9166 | return NULL; |
| 9167 | |
| 9168 | /* o2 follows the chain of op_nexts through the LHS of the |
| 9169 | * assign (if any) to the aassign op itself */ |
| 9170 | o2 = o->op_next; |
| 9171 | if (!o2 || o2->op_type != OP_NULL) |
| 9172 | return NULL; |
| 9173 | o2 = o2->op_next; |
| 9174 | if (!o2 || o2->op_type != OP_PUSHMARK) |
| 9175 | return NULL; |
| 9176 | o2 = o2->op_next; |
| 9177 | if (o2 && o2->op_type == OP_GV) |
| 9178 | o2 = o2->op_next; |
| 9179 | if (!o2 |
| 9180 | || (o2->op_type != OP_PADAV && o2->op_type != OP_RV2AV) |
| 9181 | || (o2->op_private & OPpLVAL_INTRO) |
| 9182 | ) |
| 9183 | return NULL; |
| 9184 | oleft = o2; |
| 9185 | o2 = o2->op_next; |
| 9186 | if (!o2 || o2->op_type != OP_NULL) |
| 9187 | return NULL; |
| 9188 | o2 = o2->op_next; |
| 9189 | if (!o2 || o2->op_type != OP_AASSIGN |
| 9190 | || (o2->op_flags & OPf_WANT) != OPf_WANT_VOID) |
| 9191 | return NULL; |
| 9192 | |
| 9193 | /* check that the sort is the first arg on RHS of assign */ |
| 9194 | |
| 9195 | o2 = cUNOPx(o2)->op_first; |
| 9196 | if (!o2 || o2->op_type != OP_NULL) |
| 9197 | return NULL; |
| 9198 | o2 = cUNOPx(o2)->op_first; |
| 9199 | if (!o2 || o2->op_type != OP_PUSHMARK) |
| 9200 | return NULL; |
| 9201 | if (o2->op_sibling != o) |
| 9202 | return NULL; |
| 9203 | |
| 9204 | /* check the array is the same on both sides */ |
| 9205 | if (oleft->op_type == OP_RV2AV) { |
| 9206 | if (oright->op_type != OP_RV2AV |
| 9207 | || !cUNOPx(oright)->op_first |
| 9208 | || cUNOPx(oright)->op_first->op_type != OP_GV |
| 9209 | || cGVOPx_gv(cUNOPx(oleft)->op_first) != |
| 9210 | cGVOPx_gv(cUNOPx(oright)->op_first) |
| 9211 | ) |
| 9212 | return NULL; |
| 9213 | } |
| 9214 | else if (oright->op_type != OP_PADAV |
| 9215 | || oright->op_targ != oleft->op_targ |
| 9216 | ) |
| 9217 | return NULL; |
| 9218 | |
| 9219 | return oleft; |
| 9220 | } |
| 9221 | |
| 9222 | /* A peephole optimizer. We visit the ops in the order they're to execute. |
| 9223 | * See the comments at the top of this file for more details about when |
| 9224 | * peep() is called */ |
| 9225 | |
| 9226 | void |
| 9227 | Perl_rpeep(pTHX_ register OP *o) |
| 9228 | { |
| 9229 | dVAR; |
| 9230 | register OP* oldop = NULL; |
| 9231 | |
| 9232 | if (!o || o->op_opt) |
| 9233 | return; |
| 9234 | ENTER; |
| 9235 | SAVEOP(); |
| 9236 | SAVEVPTR(PL_curcop); |
| 9237 | for (; o; o = o->op_next) { |
| 9238 | if (o->op_opt) |
| 9239 | break; |
| 9240 | /* By default, this op has now been optimised. A couple of cases below |
| 9241 | clear this again. */ |
| 9242 | o->op_opt = 1; |
| 9243 | PL_op = o; |
| 9244 | switch (o->op_type) { |
| 9245 | case OP_DBSTATE: |
| 9246 | PL_curcop = ((COP*)o); /* for warnings */ |
| 9247 | break; |
| 9248 | case OP_NEXTSTATE: |
| 9249 | PL_curcop = ((COP*)o); /* for warnings */ |
| 9250 | |
| 9251 | /* Two NEXTSTATEs in a row serve no purpose. Except if they happen |
| 9252 | to carry two labels. For now, take the easier option, and skip |
| 9253 | this optimisation if the first NEXTSTATE has a label. */ |
| 9254 | if (!CopLABEL((COP*)o)) { |
| 9255 | OP *nextop = o->op_next; |
| 9256 | while (nextop && nextop->op_type == OP_NULL) |
| 9257 | nextop = nextop->op_next; |
| 9258 | |
| 9259 | if (nextop && (nextop->op_type == OP_NEXTSTATE)) { |
| 9260 | COP *firstcop = (COP *)o; |
| 9261 | COP *secondcop = (COP *)nextop; |
| 9262 | /* We want the COP pointed to by o (and anything else) to |
| 9263 | become the next COP down the line. */ |
| 9264 | cop_free(firstcop); |
| 9265 | |
| 9266 | firstcop->op_next = secondcop->op_next; |
| 9267 | |
| 9268 | /* Now steal all its pointers, and duplicate the other |
| 9269 | data. */ |
| 9270 | firstcop->cop_line = secondcop->cop_line; |
| 9271 | #ifdef USE_ITHREADS |
| 9272 | firstcop->cop_stashpv = secondcop->cop_stashpv; |
| 9273 | firstcop->cop_file = secondcop->cop_file; |
| 9274 | #else |
| 9275 | firstcop->cop_stash = secondcop->cop_stash; |
| 9276 | firstcop->cop_filegv = secondcop->cop_filegv; |
| 9277 | #endif |
| 9278 | firstcop->cop_hints = secondcop->cop_hints; |
| 9279 | firstcop->cop_seq = secondcop->cop_seq; |
| 9280 | firstcop->cop_warnings = secondcop->cop_warnings; |
| 9281 | firstcop->cop_hints_hash = secondcop->cop_hints_hash; |
| 9282 | |
| 9283 | #ifdef USE_ITHREADS |
| 9284 | secondcop->cop_stashpv = NULL; |
| 9285 | secondcop->cop_file = NULL; |
| 9286 | #else |
| 9287 | secondcop->cop_stash = NULL; |
| 9288 | secondcop->cop_filegv = NULL; |
| 9289 | #endif |
| 9290 | secondcop->cop_warnings = NULL; |
| 9291 | secondcop->cop_hints_hash = NULL; |
| 9292 | |
| 9293 | /* If we use op_null(), and hence leave an ex-COP, some |
| 9294 | warnings are misreported. For example, the compile-time |
| 9295 | error in 'use strict; no strict refs;' */ |
| 9296 | secondcop->op_type = OP_NULL; |
| 9297 | secondcop->op_ppaddr = PL_ppaddr[OP_NULL]; |
| 9298 | } |
| 9299 | } |
| 9300 | break; |
| 9301 | |
| 9302 | case OP_CONST: |
| 9303 | if (cSVOPo->op_private & OPpCONST_STRICT) |
| 9304 | no_bareword_allowed(o); |
| 9305 | #ifdef USE_ITHREADS |
| 9306 | case OP_HINTSEVAL: |
| 9307 | case OP_METHOD_NAMED: |
| 9308 | /* Relocate sv to the pad for thread safety. |
| 9309 | * Despite being a "constant", the SV is written to, |
| 9310 | * for reference counts, sv_upgrade() etc. */ |
| 9311 | if (cSVOP->op_sv) { |
| 9312 | const PADOFFSET ix = pad_alloc(OP_CONST, SVs_PADTMP); |
| 9313 | if (o->op_type != OP_METHOD_NAMED && SvPADTMP(cSVOPo->op_sv)) { |
| 9314 | /* If op_sv is already a PADTMP then it is being used by |
| 9315 | * some pad, so make a copy. */ |
| 9316 | sv_setsv(PAD_SVl(ix),cSVOPo->op_sv); |
| 9317 | SvREADONLY_on(PAD_SVl(ix)); |
| 9318 | SvREFCNT_dec(cSVOPo->op_sv); |
| 9319 | } |
| 9320 | else if (o->op_type != OP_METHOD_NAMED |
| 9321 | && cSVOPo->op_sv == &PL_sv_undef) { |
| 9322 | /* PL_sv_undef is hack - it's unsafe to store it in the |
| 9323 | AV that is the pad, because av_fetch treats values of |
| 9324 | PL_sv_undef as a "free" AV entry and will merrily |
| 9325 | replace them with a new SV, causing pad_alloc to think |
| 9326 | that this pad slot is free. (When, clearly, it is not) |
| 9327 | */ |
| 9328 | SvOK_off(PAD_SVl(ix)); |
| 9329 | SvPADTMP_on(PAD_SVl(ix)); |
| 9330 | SvREADONLY_on(PAD_SVl(ix)); |
| 9331 | } |
| 9332 | else { |
| 9333 | SvREFCNT_dec(PAD_SVl(ix)); |
| 9334 | SvPADTMP_on(cSVOPo->op_sv); |
| 9335 | PAD_SETSV(ix, cSVOPo->op_sv); |
| 9336 | /* XXX I don't know how this isn't readonly already. */ |
| 9337 | SvREADONLY_on(PAD_SVl(ix)); |
| 9338 | } |
| 9339 | cSVOPo->op_sv = NULL; |
| 9340 | o->op_targ = ix; |
| 9341 | } |
| 9342 | #endif |
| 9343 | break; |
| 9344 | |
| 9345 | case OP_CONCAT: |
| 9346 | if (o->op_next && o->op_next->op_type == OP_STRINGIFY) { |
| 9347 | if (o->op_next->op_private & OPpTARGET_MY) { |
| 9348 | if (o->op_flags & OPf_STACKED) /* chained concats */ |
| 9349 | break; /* ignore_optimization */ |
| 9350 | else { |
| 9351 | /* assert(PL_opargs[o->op_type] & OA_TARGLEX); */ |
| 9352 | o->op_targ = o->op_next->op_targ; |
| 9353 | o->op_next->op_targ = 0; |
| 9354 | o->op_private |= OPpTARGET_MY; |
| 9355 | } |
| 9356 | } |
| 9357 | op_null(o->op_next); |
| 9358 | } |
| 9359 | break; |
| 9360 | case OP_STUB: |
| 9361 | if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) { |
| 9362 | break; /* Scalar stub must produce undef. List stub is noop */ |
| 9363 | } |
| 9364 | goto nothin; |
| 9365 | case OP_NULL: |
| 9366 | if (o->op_targ == OP_NEXTSTATE |
| 9367 | || o->op_targ == OP_DBSTATE) |
| 9368 | { |
| 9369 | PL_curcop = ((COP*)o); |
| 9370 | } |
| 9371 | /* XXX: We avoid setting op_seq here to prevent later calls |
| 9372 | to rpeep() from mistakenly concluding that optimisation |
| 9373 | has already occurred. This doesn't fix the real problem, |
| 9374 | though (See 20010220.007). AMS 20010719 */ |
| 9375 | /* op_seq functionality is now replaced by op_opt */ |
| 9376 | o->op_opt = 0; |
| 9377 | /* FALL THROUGH */ |
| 9378 | case OP_SCALAR: |
| 9379 | case OP_LINESEQ: |
| 9380 | case OP_SCOPE: |
| 9381 | nothin: |
| 9382 | if (oldop && o->op_next) { |
| 9383 | oldop->op_next = o->op_next; |
| 9384 | o->op_opt = 0; |
| 9385 | continue; |
| 9386 | } |
| 9387 | break; |
| 9388 | |
| 9389 | case OP_PADAV: |
| 9390 | case OP_GV: |
| 9391 | if (o->op_type == OP_PADAV || o->op_next->op_type == OP_RV2AV) { |
| 9392 | OP* const pop = (o->op_type == OP_PADAV) ? |
| 9393 | o->op_next : o->op_next->op_next; |
| 9394 | IV i; |
| 9395 | if (pop && pop->op_type == OP_CONST && |
| 9396 | ((PL_op = pop->op_next)) && |
| 9397 | pop->op_next->op_type == OP_AELEM && |
| 9398 | !(pop->op_next->op_private & |
| 9399 | (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF|OPpMAYBE_LVSUB)) && |
| 9400 | (i = SvIV(((SVOP*)pop)->op_sv) - CopARYBASE_get(PL_curcop)) |
| 9401 | <= 255 && |
| 9402 | i >= 0) |
| 9403 | { |
| 9404 | GV *gv; |
| 9405 | if (cSVOPx(pop)->op_private & OPpCONST_STRICT) |
| 9406 | no_bareword_allowed(pop); |
| 9407 | if (o->op_type == OP_GV) |
| 9408 | op_null(o->op_next); |
| 9409 | op_null(pop->op_next); |
| 9410 | op_null(pop); |
| 9411 | o->op_flags |= pop->op_next->op_flags & OPf_MOD; |
| 9412 | o->op_next = pop->op_next->op_next; |
| 9413 | o->op_ppaddr = PL_ppaddr[OP_AELEMFAST]; |
| 9414 | o->op_private = (U8)i; |
| 9415 | if (o->op_type == OP_GV) { |
| 9416 | gv = cGVOPo_gv; |
| 9417 | GvAVn(gv); |
| 9418 | } |
| 9419 | else |
| 9420 | o->op_flags |= OPf_SPECIAL; |
| 9421 | o->op_type = OP_AELEMFAST; |
| 9422 | } |
| 9423 | break; |
| 9424 | } |
| 9425 | |
| 9426 | if (o->op_next->op_type == OP_RV2SV) { |
| 9427 | if (!(o->op_next->op_private & OPpDEREF)) { |
| 9428 | op_null(o->op_next); |
| 9429 | o->op_private |= o->op_next->op_private & (OPpLVAL_INTRO |
| 9430 | | OPpOUR_INTRO); |
| 9431 | o->op_next = o->op_next->op_next; |
| 9432 | o->op_type = OP_GVSV; |
| 9433 | o->op_ppaddr = PL_ppaddr[OP_GVSV]; |
| 9434 | } |
| 9435 | } |
| 9436 | else if ((o->op_private & OPpEARLY_CV) && ckWARN(WARN_PROTOTYPE)) { |
| 9437 | GV * const gv = cGVOPo_gv; |
| 9438 | if (SvTYPE(gv) == SVt_PVGV && GvCV(gv) && SvPVX_const(GvCV(gv))) { |
| 9439 | /* XXX could check prototype here instead of just carping */ |
| 9440 | SV * const sv = sv_newmortal(); |
| 9441 | gv_efullname3(sv, gv, NULL); |
| 9442 | Perl_warner(aTHX_ packWARN(WARN_PROTOTYPE), |
| 9443 | "%"SVf"() called too early to check prototype", |
| 9444 | SVfARG(sv)); |
| 9445 | } |
| 9446 | } |
| 9447 | else if (o->op_next->op_type == OP_READLINE |
| 9448 | && o->op_next->op_next->op_type == OP_CONCAT |
| 9449 | && (o->op_next->op_next->op_flags & OPf_STACKED)) |
| 9450 | { |
| 9451 | /* Turn "$a .= <FH>" into an OP_RCATLINE. AMS 20010917 */ |
| 9452 | o->op_type = OP_RCATLINE; |
| 9453 | o->op_flags |= OPf_STACKED; |
| 9454 | o->op_ppaddr = PL_ppaddr[OP_RCATLINE]; |
| 9455 | op_null(o->op_next->op_next); |
| 9456 | op_null(o->op_next); |
| 9457 | } |
| 9458 | |
| 9459 | break; |
| 9460 | |
| 9461 | { |
| 9462 | OP *fop; |
| 9463 | OP *sop; |
| 9464 | |
| 9465 | case OP_NOT: |
| 9466 | fop = cUNOP->op_first; |
| 9467 | sop = NULL; |
| 9468 | goto stitch_keys; |
| 9469 | break; |
| 9470 | |
| 9471 | case OP_AND: |
| 9472 | case OP_OR: |
| 9473 | case OP_DOR: |
| 9474 | fop = cLOGOP->op_first; |
| 9475 | sop = fop->op_sibling; |
| 9476 | while (cLOGOP->op_other->op_type == OP_NULL) |
| 9477 | cLOGOP->op_other = cLOGOP->op_other->op_next; |
| 9478 | CALL_RPEEP(cLOGOP->op_other); |
| 9479 | |
| 9480 | stitch_keys: |
| 9481 | o->op_opt = 1; |
| 9482 | if ((fop->op_type == OP_PADHV || fop->op_type == OP_RV2HV) |
| 9483 | || ( sop && |
| 9484 | (sop->op_type == OP_PADHV || sop->op_type == OP_RV2HV) |
| 9485 | ) |
| 9486 | ){ |
| 9487 | OP * nop = o; |
| 9488 | OP * lop = o; |
| 9489 | if (!((nop->op_flags & OPf_WANT) == OPf_WANT_VOID)) { |
| 9490 | while (nop && nop->op_next) { |
| 9491 | switch (nop->op_next->op_type) { |
| 9492 | case OP_NOT: |
| 9493 | case OP_AND: |
| 9494 | case OP_OR: |
| 9495 | case OP_DOR: |
| 9496 | lop = nop = nop->op_next; |
| 9497 | break; |
| 9498 | case OP_NULL: |
| 9499 | nop = nop->op_next; |
| 9500 | break; |
| 9501 | default: |
| 9502 | nop = NULL; |
| 9503 | break; |
| 9504 | } |
| 9505 | } |
| 9506 | } |
| 9507 | if ((lop->op_flags & OPf_WANT) == OPf_WANT_VOID) { |
| 9508 | if (fop->op_type == OP_PADHV || fop->op_type == OP_RV2HV) |
| 9509 | cLOGOP->op_first = opt_scalarhv(fop); |
| 9510 | if (sop && (sop->op_type == OP_PADHV || sop->op_type == OP_RV2HV)) |
| 9511 | cLOGOP->op_first->op_sibling = opt_scalarhv(sop); |
| 9512 | } |
| 9513 | } |
| 9514 | |
| 9515 | |
| 9516 | break; |
| 9517 | } |
| 9518 | |
| 9519 | case OP_MAPWHILE: |
| 9520 | case OP_GREPWHILE: |
| 9521 | case OP_ANDASSIGN: |
| 9522 | case OP_ORASSIGN: |
| 9523 | case OP_DORASSIGN: |
| 9524 | case OP_COND_EXPR: |
| 9525 | case OP_RANGE: |
| 9526 | case OP_ONCE: |
| 9527 | while (cLOGOP->op_other->op_type == OP_NULL) |
| 9528 | cLOGOP->op_other = cLOGOP->op_other->op_next; |
| 9529 | CALL_RPEEP(cLOGOP->op_other); |
| 9530 | break; |
| 9531 | |
| 9532 | case OP_ENTERLOOP: |
| 9533 | case OP_ENTERITER: |
| 9534 | while (cLOOP->op_redoop->op_type == OP_NULL) |
| 9535 | cLOOP->op_redoop = cLOOP->op_redoop->op_next; |
| 9536 | CALL_RPEEP(cLOOP->op_redoop); |
| 9537 | while (cLOOP->op_nextop->op_type == OP_NULL) |
| 9538 | cLOOP->op_nextop = cLOOP->op_nextop->op_next; |
| 9539 | CALL_RPEEP(cLOOP->op_nextop); |
| 9540 | while (cLOOP->op_lastop->op_type == OP_NULL) |
| 9541 | cLOOP->op_lastop = cLOOP->op_lastop->op_next; |
| 9542 | CALL_RPEEP(cLOOP->op_lastop); |
| 9543 | break; |
| 9544 | |
| 9545 | case OP_SUBST: |
| 9546 | assert(!(cPMOP->op_pmflags & PMf_ONCE)); |
| 9547 | while (cPMOP->op_pmstashstartu.op_pmreplstart && |
| 9548 | cPMOP->op_pmstashstartu.op_pmreplstart->op_type == OP_NULL) |
| 9549 | cPMOP->op_pmstashstartu.op_pmreplstart |
| 9550 | = cPMOP->op_pmstashstartu.op_pmreplstart->op_next; |
| 9551 | CALL_RPEEP(cPMOP->op_pmstashstartu.op_pmreplstart); |
| 9552 | break; |
| 9553 | |
| 9554 | case OP_EXEC: |
| 9555 | if (o->op_next && o->op_next->op_type == OP_NEXTSTATE |
| 9556 | && ckWARN(WARN_SYNTAX)) |
| 9557 | { |
| 9558 | if (o->op_next->op_sibling) { |
| 9559 | const OPCODE type = o->op_next->op_sibling->op_type; |
| 9560 | if (type != OP_EXIT && type != OP_WARN && type != OP_DIE) { |
| 9561 | const line_t oldline = CopLINE(PL_curcop); |
| 9562 | CopLINE_set(PL_curcop, CopLINE((COP*)o->op_next)); |
| 9563 | Perl_warner(aTHX_ packWARN(WARN_EXEC), |
| 9564 | "Statement unlikely to be reached"); |
| 9565 | Perl_warner(aTHX_ packWARN(WARN_EXEC), |
| 9566 | "\t(Maybe you meant system() when you said exec()?)\n"); |
| 9567 | CopLINE_set(PL_curcop, oldline); |
| 9568 | } |
| 9569 | } |
| 9570 | } |
| 9571 | break; |
| 9572 | |
| 9573 | case OP_HELEM: { |
| 9574 | UNOP *rop; |
| 9575 | SV *lexname; |
| 9576 | GV **fields; |
| 9577 | SV **svp, *sv; |
| 9578 | const char *key = NULL; |
| 9579 | STRLEN keylen; |
| 9580 | |
| 9581 | if (((BINOP*)o)->op_last->op_type != OP_CONST) |
| 9582 | break; |
| 9583 | |
| 9584 | /* Make the CONST have a shared SV */ |
| 9585 | svp = cSVOPx_svp(((BINOP*)o)->op_last); |
| 9586 | if (!SvFAKE(sv = *svp) || !SvREADONLY(sv)) { |
| 9587 | key = SvPV_const(sv, keylen); |
| 9588 | lexname = newSVpvn_share(key, |
| 9589 | SvUTF8(sv) ? -(I32)keylen : (I32)keylen, |
| 9590 | 0); |
| 9591 | SvREFCNT_dec(sv); |
| 9592 | *svp = lexname; |
| 9593 | } |
| 9594 | |
| 9595 | if ((o->op_private & (OPpLVAL_INTRO))) |
| 9596 | break; |
| 9597 | |
| 9598 | rop = (UNOP*)((BINOP*)o)->op_first; |
| 9599 | if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV) |
| 9600 | break; |
| 9601 | lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE); |
| 9602 | if (!SvPAD_TYPED(lexname)) |
| 9603 | break; |
| 9604 | fields = (GV**)hv_fetchs(SvSTASH(lexname), "FIELDS", FALSE); |
| 9605 | if (!fields || !GvHV(*fields)) |
| 9606 | break; |
| 9607 | key = SvPV_const(*svp, keylen); |
| 9608 | if (!hv_fetch(GvHV(*fields), key, |
| 9609 | SvUTF8(*svp) ? -(I32)keylen : (I32)keylen, FALSE)) |
| 9610 | { |
| 9611 | Perl_croak(aTHX_ "No such class field \"%s\" " |
| 9612 | "in variable %s of type %s", |
| 9613 | key, SvPV_nolen_const(lexname), HvNAME_get(SvSTASH(lexname))); |
| 9614 | } |
| 9615 | |
| 9616 | break; |
| 9617 | } |
| 9618 | |
| 9619 | case OP_HSLICE: { |
| 9620 | UNOP *rop; |
| 9621 | SV *lexname; |
| 9622 | GV **fields; |
| 9623 | SV **svp; |
| 9624 | const char *key; |
| 9625 | STRLEN keylen; |
| 9626 | SVOP *first_key_op, *key_op; |
| 9627 | |
| 9628 | if ((o->op_private & (OPpLVAL_INTRO)) |
| 9629 | /* I bet there's always a pushmark... */ |
| 9630 | || ((LISTOP*)o)->op_first->op_sibling->op_type != OP_LIST) |
| 9631 | /* hmmm, no optimization if list contains only one key. */ |
| 9632 | break; |
| 9633 | rop = (UNOP*)((LISTOP*)o)->op_last; |
| 9634 | if (rop->op_type != OP_RV2HV) |
| 9635 | break; |
| 9636 | if (rop->op_first->op_type == OP_PADSV) |
| 9637 | /* @$hash{qw(keys here)} */ |
| 9638 | rop = (UNOP*)rop->op_first; |
| 9639 | else { |
| 9640 | /* @{$hash}{qw(keys here)} */ |
| 9641 | if (rop->op_first->op_type == OP_SCOPE |
| 9642 | && cLISTOPx(rop->op_first)->op_last->op_type == OP_PADSV) |
| 9643 | { |
| 9644 | rop = (UNOP*)cLISTOPx(rop->op_first)->op_last; |
| 9645 | } |
| 9646 | else |
| 9647 | break; |
| 9648 | } |
| 9649 | |
| 9650 | lexname = *av_fetch(PL_comppad_name, rop->op_targ, TRUE); |
| 9651 | if (!SvPAD_TYPED(lexname)) |
| 9652 | break; |
| 9653 | fields = (GV**)hv_fetchs(SvSTASH(lexname), "FIELDS", FALSE); |
| 9654 | if (!fields || !GvHV(*fields)) |
| 9655 | break; |
| 9656 | /* Again guessing that the pushmark can be jumped over.... */ |
| 9657 | first_key_op = (SVOP*)((LISTOP*)((LISTOP*)o)->op_first->op_sibling) |
| 9658 | ->op_first->op_sibling; |
| 9659 | for (key_op = first_key_op; key_op; |
| 9660 | key_op = (SVOP*)key_op->op_sibling) { |
| 9661 | if (key_op->op_type != OP_CONST) |
| 9662 | continue; |
| 9663 | svp = cSVOPx_svp(key_op); |
| 9664 | key = SvPV_const(*svp, keylen); |
| 9665 | if (!hv_fetch(GvHV(*fields), key, |
| 9666 | SvUTF8(*svp) ? -(I32)keylen : (I32)keylen, FALSE)) |
| 9667 | { |
| 9668 | Perl_croak(aTHX_ "No such class field \"%s\" " |
| 9669 | "in variable %s of type %s", |
| 9670 | key, SvPV_nolen(lexname), HvNAME_get(SvSTASH(lexname))); |
| 9671 | } |
| 9672 | } |
| 9673 | break; |
| 9674 | } |
| 9675 | case OP_RV2SV: |
| 9676 | case OP_RV2AV: |
| 9677 | case OP_RV2HV: |
| 9678 | if (oldop |
| 9679 | && ( oldop->op_type == OP_AELEM |
| 9680 | || oldop->op_type == OP_PADSV |
| 9681 | || oldop->op_type == OP_RV2SV |
| 9682 | || oldop->op_type == OP_RV2GV |
| 9683 | || oldop->op_type == OP_HELEM |
| 9684 | ) |
| 9685 | && (oldop->op_private & OPpDEREF) |
| 9686 | ) { |
| 9687 | o->op_private |= OPpDEREFed; |
| 9688 | } |
| 9689 | |
| 9690 | case OP_SORT: { |
| 9691 | /* will point to RV2AV or PADAV op on LHS/RHS of assign */ |
| 9692 | OP *oleft; |
| 9693 | OP *o2; |
| 9694 | |
| 9695 | /* check that RHS of sort is a single plain array */ |
| 9696 | OP *oright = cUNOPo->op_first; |
| 9697 | if (!oright || oright->op_type != OP_PUSHMARK) |
| 9698 | break; |
| 9699 | |
| 9700 | /* reverse sort ... can be optimised. */ |
| 9701 | if (!cUNOPo->op_sibling) { |
| 9702 | /* Nothing follows us on the list. */ |
| 9703 | OP * const reverse = o->op_next; |
| 9704 | |
| 9705 | if (reverse->op_type == OP_REVERSE && |
| 9706 | (reverse->op_flags & OPf_WANT) == OPf_WANT_LIST) { |
| 9707 | OP * const pushmark = cUNOPx(reverse)->op_first; |
| 9708 | if (pushmark && (pushmark->op_type == OP_PUSHMARK) |
| 9709 | && (cUNOPx(pushmark)->op_sibling == o)) { |
| 9710 | /* reverse -> pushmark -> sort */ |
| 9711 | o->op_private |= OPpSORT_REVERSE; |
| 9712 | op_null(reverse); |
| 9713 | pushmark->op_next = oright->op_next; |
| 9714 | op_null(oright); |
| 9715 | } |
| 9716 | } |
| 9717 | } |
| 9718 | |
| 9719 | /* make @a = sort @a act in-place */ |
| 9720 | |
| 9721 | oright = cUNOPx(oright)->op_sibling; |
| 9722 | if (!oright) |
| 9723 | break; |
| 9724 | if (oright->op_type == OP_NULL) { /* skip sort block/sub */ |
| 9725 | oright = cUNOPx(oright)->op_sibling; |
| 9726 | } |
| 9727 | |
| 9728 | oleft = is_inplace_av(o, oright); |
| 9729 | if (!oleft) |
| 9730 | break; |
| 9731 | |
| 9732 | /* transfer MODishness etc from LHS arg to RHS arg */ |
| 9733 | oright->op_flags = oleft->op_flags; |
| 9734 | o->op_private |= OPpSORT_INPLACE; |
| 9735 | |
| 9736 | /* excise push->gv->rv2av->null->aassign */ |
| 9737 | o2 = o->op_next->op_next; |
| 9738 | op_null(o2); /* PUSHMARK */ |
| 9739 | o2 = o2->op_next; |
| 9740 | if (o2->op_type == OP_GV) { |
| 9741 | op_null(o2); /* GV */ |
| 9742 | o2 = o2->op_next; |
| 9743 | } |
| 9744 | op_null(o2); /* RV2AV or PADAV */ |
| 9745 | o2 = o2->op_next->op_next; |
| 9746 | op_null(o2); /* AASSIGN */ |
| 9747 | |
| 9748 | o->op_next = o2->op_next; |
| 9749 | |
| 9750 | break; |
| 9751 | } |
| 9752 | |
| 9753 | case OP_REVERSE: { |
| 9754 | OP *ourmark, *theirmark, *ourlast, *iter, *expushmark, *rv2av; |
| 9755 | OP *gvop = NULL; |
| 9756 | OP *oleft, *oright; |
| 9757 | LISTOP *enter, *exlist; |
| 9758 | |
| 9759 | /* @a = reverse @a */ |
| 9760 | if ((oright = cLISTOPo->op_first) |
| 9761 | && (oright->op_type == OP_PUSHMARK) |
| 9762 | && (oright = oright->op_sibling) |
| 9763 | && (oleft = is_inplace_av(o, oright))) { |
| 9764 | OP *o2; |
| 9765 | |
| 9766 | /* transfer MODishness etc from LHS arg to RHS arg */ |
| 9767 | oright->op_flags = oleft->op_flags; |
| 9768 | o->op_private |= OPpREVERSE_INPLACE; |
| 9769 | |
| 9770 | /* excise push->gv->rv2av->null->aassign */ |
| 9771 | o2 = o->op_next->op_next; |
| 9772 | op_null(o2); /* PUSHMARK */ |
| 9773 | o2 = o2->op_next; |
| 9774 | if (o2->op_type == OP_GV) { |
| 9775 | op_null(o2); /* GV */ |
| 9776 | o2 = o2->op_next; |
| 9777 | } |
| 9778 | op_null(o2); /* RV2AV or PADAV */ |
| 9779 | o2 = o2->op_next->op_next; |
| 9780 | op_null(o2); /* AASSIGN */ |
| 9781 | |
| 9782 | o->op_next = o2->op_next; |
| 9783 | break; |
| 9784 | } |
| 9785 | |
| 9786 | enter = (LISTOP *) o->op_next; |
| 9787 | if (!enter) |
| 9788 | break; |
| 9789 | if (enter->op_type == OP_NULL) { |
| 9790 | enter = (LISTOP *) enter->op_next; |
| 9791 | if (!enter) |
| 9792 | break; |
| 9793 | } |
| 9794 | /* for $a (...) will have OP_GV then OP_RV2GV here. |
| 9795 | for (...) just has an OP_GV. */ |
| 9796 | if (enter->op_type == OP_GV) { |
| 9797 | gvop = (OP *) enter; |
| 9798 | enter = (LISTOP *) enter->op_next; |
| 9799 | if (!enter) |
| 9800 | break; |
| 9801 | if (enter->op_type == OP_RV2GV) { |
| 9802 | enter = (LISTOP *) enter->op_next; |
| 9803 | if (!enter) |
| 9804 | break; |
| 9805 | } |
| 9806 | } |
| 9807 | |
| 9808 | if (enter->op_type != OP_ENTERITER) |
| 9809 | break; |
| 9810 | |
| 9811 | iter = enter->op_next; |
| 9812 | if (!iter || iter->op_type != OP_ITER) |
| 9813 | break; |
| 9814 | |
| 9815 | expushmark = enter->op_first; |
| 9816 | if (!expushmark || expushmark->op_type != OP_NULL |
| 9817 | || expushmark->op_targ != OP_PUSHMARK) |
| 9818 | break; |
| 9819 | |
| 9820 | exlist = (LISTOP *) expushmark->op_sibling; |
| 9821 | if (!exlist || exlist->op_type != OP_NULL |
| 9822 | || exlist->op_targ != OP_LIST) |
| 9823 | break; |
| 9824 | |
| 9825 | if (exlist->op_last != o) { |
| 9826 | /* Mmm. Was expecting to point back to this op. */ |
| 9827 | break; |
| 9828 | } |
| 9829 | theirmark = exlist->op_first; |
| 9830 | if (!theirmark || theirmark->op_type != OP_PUSHMARK) |
| 9831 | break; |
| 9832 | |
| 9833 | if (theirmark->op_sibling != o) { |
| 9834 | /* There's something between the mark and the reverse, eg |
| 9835 | for (1, reverse (...)) |
| 9836 | so no go. */ |
| 9837 | break; |
| 9838 | } |
| 9839 | |
| 9840 | ourmark = ((LISTOP *)o)->op_first; |
| 9841 | if (!ourmark || ourmark->op_type != OP_PUSHMARK) |
| 9842 | break; |
| 9843 | |
| 9844 | ourlast = ((LISTOP *)o)->op_last; |
| 9845 | if (!ourlast || ourlast->op_next != o) |
| 9846 | break; |
| 9847 | |
| 9848 | rv2av = ourmark->op_sibling; |
| 9849 | if (rv2av && rv2av->op_type == OP_RV2AV && rv2av->op_sibling == 0 |
| 9850 | && rv2av->op_flags == (OPf_WANT_LIST | OPf_KIDS) |
| 9851 | && enter->op_flags == (OPf_WANT_LIST | OPf_KIDS)) { |
| 9852 | /* We're just reversing a single array. */ |
| 9853 | rv2av->op_flags = OPf_WANT_SCALAR | OPf_KIDS | OPf_REF; |
| 9854 | enter->op_flags |= OPf_STACKED; |
| 9855 | } |
| 9856 | |
| 9857 | /* We don't have control over who points to theirmark, so sacrifice |
| 9858 | ours. */ |
| 9859 | theirmark->op_next = ourmark->op_next; |
| 9860 | theirmark->op_flags = ourmark->op_flags; |
| 9861 | ourlast->op_next = gvop ? gvop : (OP *) enter; |
| 9862 | op_null(ourmark); |
| 9863 | op_null(o); |
| 9864 | enter->op_private |= OPpITER_REVERSED; |
| 9865 | iter->op_private |= OPpITER_REVERSED; |
| 9866 | |
| 9867 | break; |
| 9868 | } |
| 9869 | |
| 9870 | case OP_SASSIGN: { |
| 9871 | OP *rv2gv; |
| 9872 | UNOP *refgen, *rv2cv; |
| 9873 | LISTOP *exlist; |
| 9874 | |
| 9875 | if ((o->op_flags & OPf_WANT) != OPf_WANT_VOID) |
| 9876 | break; |
| 9877 | |
| 9878 | if ((o->op_private & ~OPpASSIGN_BACKWARDS) != 2) |
| 9879 | break; |
| 9880 | |
| 9881 | rv2gv = ((BINOP *)o)->op_last; |
| 9882 | if (!rv2gv || rv2gv->op_type != OP_RV2GV) |
| 9883 | break; |
| 9884 | |
| 9885 | refgen = (UNOP *)((BINOP *)o)->op_first; |
| 9886 | |
| 9887 | if (!refgen || refgen->op_type != OP_REFGEN) |
| 9888 | break; |
| 9889 | |
| 9890 | exlist = (LISTOP *)refgen->op_first; |
| 9891 | if (!exlist || exlist->op_type != OP_NULL |
| 9892 | || exlist->op_targ != OP_LIST) |
| 9893 | break; |
| 9894 | |
| 9895 | if (exlist->op_first->op_type != OP_PUSHMARK) |
| 9896 | break; |
| 9897 | |
| 9898 | rv2cv = (UNOP*)exlist->op_last; |
| 9899 | |
| 9900 | if (rv2cv->op_type != OP_RV2CV) |
| 9901 | break; |
| 9902 | |
| 9903 | assert ((rv2gv->op_private & OPpDONT_INIT_GV) == 0); |
| 9904 | assert ((o->op_private & OPpASSIGN_CV_TO_GV) == 0); |
| 9905 | assert ((rv2cv->op_private & OPpMAY_RETURN_CONSTANT) == 0); |
| 9906 | |
| 9907 | o->op_private |= OPpASSIGN_CV_TO_GV; |
| 9908 | rv2gv->op_private |= OPpDONT_INIT_GV; |
| 9909 | rv2cv->op_private |= OPpMAY_RETURN_CONSTANT; |
| 9910 | |
| 9911 | break; |
| 9912 | } |
| 9913 | |
| 9914 | |
| 9915 | case OP_QR: |
| 9916 | case OP_MATCH: |
| 9917 | if (!(cPMOP->op_pmflags & PMf_ONCE)) { |
| 9918 | assert (!cPMOP->op_pmstashstartu.op_pmreplstart); |
| 9919 | } |
| 9920 | break; |
| 9921 | } |
| 9922 | oldop = o; |
| 9923 | } |
| 9924 | LEAVE; |
| 9925 | } |
| 9926 | |
| 9927 | void |
| 9928 | Perl_peep(pTHX_ register OP *o) |
| 9929 | { |
| 9930 | CALL_RPEEP(o); |
| 9931 | } |
| 9932 | |
| 9933 | const char* |
| 9934 | Perl_custom_op_name(pTHX_ const OP* o) |
| 9935 | { |
| 9936 | dVAR; |
| 9937 | const IV index = PTR2IV(o->op_ppaddr); |
| 9938 | SV* keysv; |
| 9939 | HE* he; |
| 9940 | |
| 9941 | PERL_ARGS_ASSERT_CUSTOM_OP_NAME; |
| 9942 | |
| 9943 | if (!PL_custom_op_names) /* This probably shouldn't happen */ |
| 9944 | return (char *)PL_op_name[OP_CUSTOM]; |
| 9945 | |
| 9946 | keysv = sv_2mortal(newSViv(index)); |
| 9947 | |
| 9948 | he = hv_fetch_ent(PL_custom_op_names, keysv, 0, 0); |
| 9949 | if (!he) |
| 9950 | return (char *)PL_op_name[OP_CUSTOM]; /* Don't know who you are */ |
| 9951 | |
| 9952 | return SvPV_nolen(HeVAL(he)); |
| 9953 | } |
| 9954 | |
| 9955 | const char* |
| 9956 | Perl_custom_op_desc(pTHX_ const OP* o) |
| 9957 | { |
| 9958 | dVAR; |
| 9959 | const IV index = PTR2IV(o->op_ppaddr); |
| 9960 | SV* keysv; |
| 9961 | HE* he; |
| 9962 | |
| 9963 | PERL_ARGS_ASSERT_CUSTOM_OP_DESC; |
| 9964 | |
| 9965 | if (!PL_custom_op_descs) |
| 9966 | return (char *)PL_op_desc[OP_CUSTOM]; |
| 9967 | |
| 9968 | keysv = sv_2mortal(newSViv(index)); |
| 9969 | |
| 9970 | he = hv_fetch_ent(PL_custom_op_descs, keysv, 0, 0); |
| 9971 | if (!he) |
| 9972 | return (char *)PL_op_desc[OP_CUSTOM]; |
| 9973 | |
| 9974 | return SvPV_nolen(HeVAL(he)); |
| 9975 | } |
| 9976 | |
| 9977 | #include "XSUB.h" |
| 9978 | |
| 9979 | /* Efficient sub that returns a constant scalar value. */ |
| 9980 | static void |
| 9981 | const_sv_xsub(pTHX_ CV* cv) |
| 9982 | { |
| 9983 | dVAR; |
| 9984 | dXSARGS; |
| 9985 | SV *const sv = MUTABLE_SV(XSANY.any_ptr); |
| 9986 | if (items != 0) { |
| 9987 | NOOP; |
| 9988 | #if 0 |
| 9989 | /* diag_listed_as: SKIPME */ |
| 9990 | Perl_croak(aTHX_ "usage: %s::%s()", |
| 9991 | HvNAME_get(GvSTASH(CvGV(cv))), GvNAME(CvGV(cv))); |
| 9992 | #endif |
| 9993 | } |
| 9994 | if (!sv) { |
| 9995 | XSRETURN(0); |
| 9996 | } |
| 9997 | EXTEND(sp, 1); |
| 9998 | ST(0) = sv; |
| 9999 | XSRETURN(1); |
| 10000 | } |
| 10001 | |
| 10002 | /* |
| 10003 | * Local variables: |
| 10004 | * c-indentation-style: bsd |
| 10005 | * c-basic-offset: 4 |
| 10006 | * indent-tabs-mode: t |
| 10007 | * End: |
| 10008 | * |
| 10009 | * ex: set ts=8 sts=4 sw=4 noet: |
| 10010 | */ |