| 1 | /* scope.c |
| 2 | * |
| 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others |
| 5 | * |
| 6 | * You may distribute under the terms of either the GNU General Public |
| 7 | * License or the Artistic License, as specified in the README file. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * For the fashion of Minas Tirith was such that it was built on seven |
| 13 | * levels... |
| 14 | * |
| 15 | * [p.751 of _The Lord of the Rings_, V/i: "Minas Tirith"] |
| 16 | */ |
| 17 | |
| 18 | /* This file contains functions to manipulate several of Perl's stacks; |
| 19 | * in particular it contains code to push various types of things onto |
| 20 | * the savestack, then to pop them off and perform the correct restorative |
| 21 | * action for each one. This corresponds to the cleanup Perl does at |
| 22 | * each scope exit. |
| 23 | */ |
| 24 | |
| 25 | #include "EXTERN.h" |
| 26 | #define PERL_IN_SCOPE_C |
| 27 | #include "perl.h" |
| 28 | |
| 29 | SV** |
| 30 | Perl_stack_grow(pTHX_ SV **sp, SV **p, SSize_t n) |
| 31 | { |
| 32 | PERL_ARGS_ASSERT_STACK_GROW; |
| 33 | |
| 34 | PL_stack_sp = sp; |
| 35 | #ifndef STRESS_REALLOC |
| 36 | av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128); |
| 37 | #else |
| 38 | av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1); |
| 39 | #endif |
| 40 | return PL_stack_sp; |
| 41 | } |
| 42 | |
| 43 | #ifndef STRESS_REALLOC |
| 44 | #define GROW(old) ((old) * 3 / 2) |
| 45 | #else |
| 46 | #define GROW(old) ((old) + 1) |
| 47 | #endif |
| 48 | |
| 49 | PERL_SI * |
| 50 | Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems) |
| 51 | { |
| 52 | PERL_SI *si; |
| 53 | Newx(si, 1, PERL_SI); |
| 54 | si->si_stack = newAV(); |
| 55 | AvREAL_off(si->si_stack); |
| 56 | av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0); |
| 57 | AvALLOC(si->si_stack)[0] = &PL_sv_undef; |
| 58 | AvFILLp(si->si_stack) = 0; |
| 59 | si->si_prev = 0; |
| 60 | si->si_next = 0; |
| 61 | si->si_cxmax = cxitems - 1; |
| 62 | si->si_cxix = -1; |
| 63 | si->si_type = PERLSI_UNDEF; |
| 64 | Newx(si->si_cxstack, cxitems, PERL_CONTEXT); |
| 65 | /* Without any kind of initialising PUSHSUBST() |
| 66 | * in pp_subst() will read uninitialised heap. */ |
| 67 | PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT); |
| 68 | return si; |
| 69 | } |
| 70 | |
| 71 | I32 |
| 72 | Perl_cxinc(pTHX) |
| 73 | { |
| 74 | const IV old_max = cxstack_max; |
| 75 | cxstack_max = GROW(cxstack_max); |
| 76 | Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); |
| 77 | /* Without any kind of initialising deep enough recursion |
| 78 | * will end up reading uninitialised PERL_CONTEXTs. */ |
| 79 | PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT); |
| 80 | return cxstack_ix + 1; |
| 81 | } |
| 82 | |
| 83 | void |
| 84 | Perl_push_scope(pTHX) |
| 85 | { |
| 86 | if (UNLIKELY(PL_scopestack_ix == PL_scopestack_max)) { |
| 87 | PL_scopestack_max = GROW(PL_scopestack_max); |
| 88 | Renew(PL_scopestack, PL_scopestack_max, I32); |
| 89 | #ifdef DEBUGGING |
| 90 | Renew(PL_scopestack_name, PL_scopestack_max, const char*); |
| 91 | #endif |
| 92 | } |
| 93 | #ifdef DEBUGGING |
| 94 | PL_scopestack_name[PL_scopestack_ix] = "unknown"; |
| 95 | #endif |
| 96 | PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix; |
| 97 | |
| 98 | } |
| 99 | |
| 100 | void |
| 101 | Perl_pop_scope(pTHX) |
| 102 | { |
| 103 | const I32 oldsave = PL_scopestack[--PL_scopestack_ix]; |
| 104 | LEAVE_SCOPE(oldsave); |
| 105 | } |
| 106 | |
| 107 | I32 * |
| 108 | Perl_markstack_grow(pTHX) |
| 109 | { |
| 110 | const I32 oldmax = PL_markstack_max - PL_markstack; |
| 111 | const I32 newmax = GROW(oldmax); |
| 112 | |
| 113 | Renew(PL_markstack, newmax, I32); |
| 114 | PL_markstack_max = PL_markstack + newmax; |
| 115 | PL_markstack_ptr = PL_markstack + oldmax; |
| 116 | return PL_markstack_ptr; |
| 117 | } |
| 118 | |
| 119 | void |
| 120 | Perl_savestack_grow(pTHX) |
| 121 | { |
| 122 | PL_savestack_max = GROW(PL_savestack_max) + 4; |
| 123 | Renew(PL_savestack, PL_savestack_max, ANY); |
| 124 | } |
| 125 | |
| 126 | void |
| 127 | Perl_savestack_grow_cnt(pTHX_ I32 need) |
| 128 | { |
| 129 | PL_savestack_max = PL_savestack_ix + need; |
| 130 | Renew(PL_savestack, PL_savestack_max, ANY); |
| 131 | } |
| 132 | |
| 133 | #undef GROW |
| 134 | |
| 135 | void |
| 136 | Perl_tmps_grow(pTHX_ SSize_t n) |
| 137 | { |
| 138 | #ifndef STRESS_REALLOC |
| 139 | if (n < 128) |
| 140 | n = (PL_tmps_max < 512) ? 128 : 512; |
| 141 | #endif |
| 142 | PL_tmps_max = PL_tmps_ix + n + 1; |
| 143 | Renew(PL_tmps_stack, PL_tmps_max, SV*); |
| 144 | } |
| 145 | |
| 146 | |
| 147 | void |
| 148 | Perl_free_tmps(pTHX) |
| 149 | { |
| 150 | /* XXX should tmps_floor live in cxstack? */ |
| 151 | const SSize_t myfloor = PL_tmps_floor; |
| 152 | while (PL_tmps_ix > myfloor) { /* clean up after last statement */ |
| 153 | SV* const sv = PL_tmps_stack[PL_tmps_ix--]; |
| 154 | #ifdef PERL_POISON |
| 155 | PoisonWith(PL_tmps_stack + PL_tmps_ix + 1, 1, SV *, 0xAB); |
| 156 | #endif |
| 157 | if (LIKELY(sv && sv != &PL_sv_undef)) { |
| 158 | SvTEMP_off(sv); |
| 159 | SvREFCNT_dec_NN(sv); /* note, can modify tmps_ix!!! */ |
| 160 | } |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | STATIC SV * |
| 165 | S_save_scalar_at(pTHX_ SV **sptr, const U32 flags) |
| 166 | { |
| 167 | SV * osv; |
| 168 | SV *sv; |
| 169 | |
| 170 | PERL_ARGS_ASSERT_SAVE_SCALAR_AT; |
| 171 | |
| 172 | osv = *sptr; |
| 173 | sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0)); |
| 174 | |
| 175 | if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv)) { |
| 176 | if (SvGMAGICAL(osv)) { |
| 177 | SvFLAGS(osv) |= (SvFLAGS(osv) & |
| 178 | (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT; |
| 179 | } |
| 180 | if (!(flags & SAVEf_KEEPOLDELEM)) |
| 181 | mg_localize(osv, sv, cBOOL(flags & SAVEf_SETMAGIC)); |
| 182 | } |
| 183 | |
| 184 | return sv; |
| 185 | } |
| 186 | |
| 187 | void |
| 188 | Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type) |
| 189 | { |
| 190 | dSS_ADD; |
| 191 | SS_ADD_PTR(ptr1); |
| 192 | SS_ADD_PTR(ptr2); |
| 193 | SS_ADD_UV(type); |
| 194 | SS_ADD_END(3); |
| 195 | } |
| 196 | |
| 197 | SV * |
| 198 | Perl_save_scalar(pTHX_ GV *gv) |
| 199 | { |
| 200 | SV ** const sptr = &GvSVn(gv); |
| 201 | |
| 202 | PERL_ARGS_ASSERT_SAVE_SCALAR; |
| 203 | |
| 204 | if (UNLIKELY(SvGMAGICAL(*sptr))) { |
| 205 | PL_localizing = 1; |
| 206 | (void)mg_get(*sptr); |
| 207 | PL_localizing = 0; |
| 208 | } |
| 209 | save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV); |
| 210 | return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */ |
| 211 | } |
| 212 | |
| 213 | /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to |
| 214 | * restore a global SV to its prior contents, freeing new value. */ |
| 215 | void |
| 216 | Perl_save_generic_svref(pTHX_ SV **sptr) |
| 217 | { |
| 218 | PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF; |
| 219 | |
| 220 | save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF); |
| 221 | } |
| 222 | |
| 223 | /* Like save_pptr(), but also Safefree()s the new value if it is different |
| 224 | * from the old one. Can be used to restore a global char* to its prior |
| 225 | * contents, freeing new value. */ |
| 226 | void |
| 227 | Perl_save_generic_pvref(pTHX_ char **str) |
| 228 | { |
| 229 | PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF; |
| 230 | |
| 231 | save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF); |
| 232 | } |
| 233 | |
| 234 | /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree(). |
| 235 | * Can be used to restore a shared global char* to its prior |
| 236 | * contents, freeing new value. */ |
| 237 | void |
| 238 | Perl_save_shared_pvref(pTHX_ char **str) |
| 239 | { |
| 240 | PERL_ARGS_ASSERT_SAVE_SHARED_PVREF; |
| 241 | |
| 242 | save_pushptrptr(str, *str, SAVEt_SHARED_PVREF); |
| 243 | } |
| 244 | |
| 245 | /* set the SvFLAGS specified by mask to the values in val */ |
| 246 | |
| 247 | void |
| 248 | Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val) |
| 249 | { |
| 250 | dSS_ADD; |
| 251 | |
| 252 | PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS; |
| 253 | |
| 254 | SS_ADD_PTR(sv); |
| 255 | SS_ADD_INT(mask); |
| 256 | SS_ADD_INT(val); |
| 257 | SS_ADD_UV(SAVEt_SET_SVFLAGS); |
| 258 | SS_ADD_END(4); |
| 259 | } |
| 260 | |
| 261 | void |
| 262 | Perl_save_gp(pTHX_ GV *gv, I32 empty) |
| 263 | { |
| 264 | PERL_ARGS_ASSERT_SAVE_GP; |
| 265 | |
| 266 | save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP); |
| 267 | |
| 268 | if (empty) { |
| 269 | GP *gp = Perl_newGP(aTHX_ gv); |
| 270 | HV * const stash = GvSTASH(gv); |
| 271 | bool isa_changed = 0; |
| 272 | |
| 273 | if (stash && HvENAME(stash)) { |
| 274 | if (GvNAMELEN(gv) == 3 && strnEQ(GvNAME(gv), "ISA", 3)) |
| 275 | isa_changed = TRUE; |
| 276 | else if (GvCVu(gv)) |
| 277 | /* taking a method out of circulation ("local")*/ |
| 278 | mro_method_changed_in(stash); |
| 279 | } |
| 280 | if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) { |
| 281 | gp->gp_io = newIO(); |
| 282 | IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START; |
| 283 | } |
| 284 | GvGP_set(gv,gp); |
| 285 | if (isa_changed) mro_isa_changed_in(stash); |
| 286 | } |
| 287 | else { |
| 288 | gp_ref(GvGP(gv)); |
| 289 | GvINTRO_on(gv); |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | AV * |
| 294 | Perl_save_ary(pTHX_ GV *gv) |
| 295 | { |
| 296 | AV * const oav = GvAVn(gv); |
| 297 | AV *av; |
| 298 | |
| 299 | PERL_ARGS_ASSERT_SAVE_ARY; |
| 300 | |
| 301 | if (UNLIKELY(!AvREAL(oav) && AvREIFY(oav))) |
| 302 | av_reify(oav); |
| 303 | save_pushptrptr(SvREFCNT_inc_simple_NN(gv), oav, SAVEt_AV); |
| 304 | |
| 305 | GvAV(gv) = NULL; |
| 306 | av = GvAVn(gv); |
| 307 | if (UNLIKELY(SvMAGIC(oav))) |
| 308 | mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE); |
| 309 | return av; |
| 310 | } |
| 311 | |
| 312 | HV * |
| 313 | Perl_save_hash(pTHX_ GV *gv) |
| 314 | { |
| 315 | HV *ohv, *hv; |
| 316 | |
| 317 | PERL_ARGS_ASSERT_SAVE_HASH; |
| 318 | |
| 319 | save_pushptrptr( |
| 320 | SvREFCNT_inc_simple_NN(gv), (ohv = GvHVn(gv)), SAVEt_HV |
| 321 | ); |
| 322 | |
| 323 | GvHV(gv) = NULL; |
| 324 | hv = GvHVn(gv); |
| 325 | if (UNLIKELY(SvMAGIC(ohv))) |
| 326 | mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE); |
| 327 | return hv; |
| 328 | } |
| 329 | |
| 330 | void |
| 331 | Perl_save_item(pTHX_ SV *item) |
| 332 | { |
| 333 | SV * const sv = newSVsv(item); |
| 334 | |
| 335 | PERL_ARGS_ASSERT_SAVE_ITEM; |
| 336 | |
| 337 | save_pushptrptr(item, /* remember the pointer */ |
| 338 | sv, /* remember the value */ |
| 339 | SAVEt_ITEM); |
| 340 | } |
| 341 | |
| 342 | void |
| 343 | Perl_save_bool(pTHX_ bool *boolp) |
| 344 | { |
| 345 | dSS_ADD; |
| 346 | |
| 347 | PERL_ARGS_ASSERT_SAVE_BOOL; |
| 348 | |
| 349 | SS_ADD_PTR(boolp); |
| 350 | SS_ADD_UV(SAVEt_BOOL | (*boolp << 8)); |
| 351 | SS_ADD_END(2); |
| 352 | } |
| 353 | |
| 354 | void |
| 355 | Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type) |
| 356 | { |
| 357 | dSS_ADD; |
| 358 | |
| 359 | SS_ADD_INT(i); |
| 360 | SS_ADD_PTR(ptr); |
| 361 | SS_ADD_UV(type); |
| 362 | SS_ADD_END(3); |
| 363 | } |
| 364 | |
| 365 | void |
| 366 | Perl_save_int(pTHX_ int *intp) |
| 367 | { |
| 368 | const int i = *intp; |
| 369 | UV type = ((UV)((UV)i << SAVE_TIGHT_SHIFT) | SAVEt_INT_SMALL); |
| 370 | int size = 2; |
| 371 | dSS_ADD; |
| 372 | |
| 373 | PERL_ARGS_ASSERT_SAVE_INT; |
| 374 | |
| 375 | if (UNLIKELY((int)(type >> SAVE_TIGHT_SHIFT) != i)) { |
| 376 | SS_ADD_INT(i); |
| 377 | type = SAVEt_INT; |
| 378 | size++; |
| 379 | } |
| 380 | SS_ADD_PTR(intp); |
| 381 | SS_ADD_UV(type); |
| 382 | SS_ADD_END(size); |
| 383 | } |
| 384 | |
| 385 | void |
| 386 | Perl_save_I8(pTHX_ I8 *bytep) |
| 387 | { |
| 388 | dSS_ADD; |
| 389 | |
| 390 | PERL_ARGS_ASSERT_SAVE_I8; |
| 391 | |
| 392 | SS_ADD_PTR(bytep); |
| 393 | SS_ADD_UV(SAVEt_I8 | ((UV)*bytep << 8)); |
| 394 | SS_ADD_END(2); |
| 395 | } |
| 396 | |
| 397 | void |
| 398 | Perl_save_I16(pTHX_ I16 *intp) |
| 399 | { |
| 400 | dSS_ADD; |
| 401 | |
| 402 | PERL_ARGS_ASSERT_SAVE_I16; |
| 403 | |
| 404 | SS_ADD_PTR(intp); |
| 405 | SS_ADD_UV(SAVEt_I16 | ((UV)*intp << 8)); |
| 406 | SS_ADD_END(2); |
| 407 | } |
| 408 | |
| 409 | void |
| 410 | Perl_save_I32(pTHX_ I32 *intp) |
| 411 | { |
| 412 | const I32 i = *intp; |
| 413 | UV type = ((I32)((U32)i << SAVE_TIGHT_SHIFT) | SAVEt_I32_SMALL); |
| 414 | int size = 2; |
| 415 | dSS_ADD; |
| 416 | |
| 417 | PERL_ARGS_ASSERT_SAVE_I32; |
| 418 | |
| 419 | if (UNLIKELY((I32)(type >> SAVE_TIGHT_SHIFT) != i)) { |
| 420 | SS_ADD_INT(i); |
| 421 | type = SAVEt_I32; |
| 422 | size++; |
| 423 | } |
| 424 | SS_ADD_PTR(intp); |
| 425 | SS_ADD_UV(type); |
| 426 | SS_ADD_END(size); |
| 427 | } |
| 428 | |
| 429 | void |
| 430 | Perl_save_strlen(pTHX_ STRLEN *ptr) |
| 431 | { |
| 432 | dSS_ADD; |
| 433 | |
| 434 | PERL_ARGS_ASSERT_SAVE_STRLEN; |
| 435 | |
| 436 | SS_ADD_IV(*ptr); |
| 437 | SS_ADD_PTR(ptr); |
| 438 | SS_ADD_UV(SAVEt_STRLEN); |
| 439 | SS_ADD_END(3); |
| 440 | } |
| 441 | |
| 442 | /* Cannot use save_sptr() to store a char* since the SV** cast will |
| 443 | * force word-alignment and we'll miss the pointer. |
| 444 | */ |
| 445 | void |
| 446 | Perl_save_pptr(pTHX_ char **pptr) |
| 447 | { |
| 448 | PERL_ARGS_ASSERT_SAVE_PPTR; |
| 449 | |
| 450 | save_pushptrptr(*pptr, pptr, SAVEt_PPTR); |
| 451 | } |
| 452 | |
| 453 | void |
| 454 | Perl_save_vptr(pTHX_ void *ptr) |
| 455 | { |
| 456 | PERL_ARGS_ASSERT_SAVE_VPTR; |
| 457 | |
| 458 | save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR); |
| 459 | } |
| 460 | |
| 461 | void |
| 462 | Perl_save_sptr(pTHX_ SV **sptr) |
| 463 | { |
| 464 | PERL_ARGS_ASSERT_SAVE_SPTR; |
| 465 | |
| 466 | save_pushptrptr(*sptr, sptr, SAVEt_SPTR); |
| 467 | } |
| 468 | |
| 469 | void |
| 470 | Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off) |
| 471 | { |
| 472 | dSS_ADD; |
| 473 | |
| 474 | ASSERT_CURPAD_ACTIVE("save_padsv"); |
| 475 | SS_ADD_PTR(SvREFCNT_inc_simple_NN(PL_curpad[off])); |
| 476 | SS_ADD_PTR(PL_comppad); |
| 477 | SS_ADD_UV((UV)off); |
| 478 | SS_ADD_UV(SAVEt_PADSV_AND_MORTALIZE); |
| 479 | SS_ADD_END(4); |
| 480 | } |
| 481 | |
| 482 | void |
| 483 | Perl_save_hptr(pTHX_ HV **hptr) |
| 484 | { |
| 485 | PERL_ARGS_ASSERT_SAVE_HPTR; |
| 486 | |
| 487 | save_pushptrptr(*hptr, hptr, SAVEt_HPTR); |
| 488 | } |
| 489 | |
| 490 | void |
| 491 | Perl_save_aptr(pTHX_ AV **aptr) |
| 492 | { |
| 493 | PERL_ARGS_ASSERT_SAVE_APTR; |
| 494 | |
| 495 | save_pushptrptr(*aptr, aptr, SAVEt_APTR); |
| 496 | } |
| 497 | |
| 498 | void |
| 499 | Perl_save_pushptr(pTHX_ void *const ptr, const int type) |
| 500 | { |
| 501 | dSS_ADD; |
| 502 | SS_ADD_PTR(ptr); |
| 503 | SS_ADD_UV(type); |
| 504 | SS_ADD_END(2); |
| 505 | } |
| 506 | |
| 507 | void |
| 508 | Perl_save_clearsv(pTHX_ SV **svp) |
| 509 | { |
| 510 | const UV offset = svp - PL_curpad; |
| 511 | const UV offset_shifted = offset << SAVE_TIGHT_SHIFT; |
| 512 | |
| 513 | PERL_ARGS_ASSERT_SAVE_CLEARSV; |
| 514 | |
| 515 | ASSERT_CURPAD_ACTIVE("save_clearsv"); |
| 516 | SvPADSTALE_off(*svp); /* mark lexical as active */ |
| 517 | if (UNLIKELY((offset_shifted >> SAVE_TIGHT_SHIFT) != offset)) { |
| 518 | Perl_croak(aTHX_ "panic: pad offset %"UVuf" out of range (%p-%p)", |
| 519 | offset, svp, PL_curpad); |
| 520 | } |
| 521 | |
| 522 | { |
| 523 | dSS_ADD; |
| 524 | SS_ADD_UV(offset_shifted | SAVEt_CLEARSV); |
| 525 | SS_ADD_END(1); |
| 526 | } |
| 527 | } |
| 528 | |
| 529 | void |
| 530 | Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen) |
| 531 | { |
| 532 | PERL_ARGS_ASSERT_SAVE_DELETE; |
| 533 | |
| 534 | save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE); |
| 535 | } |
| 536 | |
| 537 | void |
| 538 | Perl_save_hdelete(pTHX_ HV *hv, SV *keysv) |
| 539 | { |
| 540 | STRLEN len; |
| 541 | I32 klen; |
| 542 | const char *key; |
| 543 | |
| 544 | PERL_ARGS_ASSERT_SAVE_HDELETE; |
| 545 | |
| 546 | key = SvPV_const(keysv, len); |
| 547 | klen = SvUTF8(keysv) ? -(I32)len : (I32)len; |
| 548 | SvREFCNT_inc_simple_void_NN(hv); |
| 549 | save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE); |
| 550 | } |
| 551 | |
| 552 | void |
| 553 | Perl_save_adelete(pTHX_ AV *av, SSize_t key) |
| 554 | { |
| 555 | dSS_ADD; |
| 556 | |
| 557 | PERL_ARGS_ASSERT_SAVE_ADELETE; |
| 558 | |
| 559 | SvREFCNT_inc_void(av); |
| 560 | SS_ADD_UV(key); |
| 561 | SS_ADD_PTR(av); |
| 562 | SS_ADD_IV(SAVEt_ADELETE); |
| 563 | SS_ADD_END(3); |
| 564 | } |
| 565 | |
| 566 | void |
| 567 | Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p) |
| 568 | { |
| 569 | dSS_ADD; |
| 570 | PERL_ARGS_ASSERT_SAVE_DESTRUCTOR; |
| 571 | |
| 572 | SS_ADD_DPTR(f); |
| 573 | SS_ADD_PTR(p); |
| 574 | SS_ADD_UV(SAVEt_DESTRUCTOR); |
| 575 | SS_ADD_END(3); |
| 576 | } |
| 577 | |
| 578 | void |
| 579 | Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p) |
| 580 | { |
| 581 | dSS_ADD; |
| 582 | |
| 583 | SS_ADD_DXPTR(f); |
| 584 | SS_ADD_PTR(p); |
| 585 | SS_ADD_UV(SAVEt_DESTRUCTOR_X); |
| 586 | SS_ADD_END(3); |
| 587 | } |
| 588 | |
| 589 | void |
| 590 | Perl_save_hints(pTHX) |
| 591 | { |
| 592 | COPHH *save_cophh = cophh_copy(CopHINTHASH_get(&PL_compiling)); |
| 593 | if (PL_hints & HINT_LOCALIZE_HH) { |
| 594 | HV *oldhh = GvHV(PL_hintgv); |
| 595 | save_pushptri32ptr(oldhh, PL_hints, save_cophh, SAVEt_HINTS); |
| 596 | GvHV(PL_hintgv) = NULL; /* in case copying dies */ |
| 597 | GvHV(PL_hintgv) = hv_copy_hints_hv(oldhh); |
| 598 | } else { |
| 599 | save_pushi32ptr(PL_hints, save_cophh, SAVEt_HINTS); |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | static void |
| 604 | S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2, |
| 605 | const int type) |
| 606 | { |
| 607 | dSS_ADD; |
| 608 | SS_ADD_PTR(ptr1); |
| 609 | SS_ADD_INT(i); |
| 610 | SS_ADD_PTR(ptr2); |
| 611 | SS_ADD_UV(type); |
| 612 | SS_ADD_END(4); |
| 613 | } |
| 614 | |
| 615 | void |
| 616 | Perl_save_aelem_flags(pTHX_ AV *av, SSize_t idx, SV **sptr, |
| 617 | const U32 flags) |
| 618 | { |
| 619 | dSS_ADD; |
| 620 | SV *sv; |
| 621 | |
| 622 | PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS; |
| 623 | |
| 624 | SvGETMAGIC(*sptr); |
| 625 | SS_ADD_PTR(SvREFCNT_inc_simple(av)); |
| 626 | SS_ADD_IV(idx); |
| 627 | SS_ADD_PTR(SvREFCNT_inc(*sptr)); |
| 628 | SS_ADD_UV(SAVEt_AELEM); |
| 629 | SS_ADD_END(4); |
| 630 | /* The array needs to hold a reference count on its new element, so it |
| 631 | must be AvREAL. */ |
| 632 | if (UNLIKELY(!AvREAL(av) && AvREIFY(av))) |
| 633 | av_reify(av); |
| 634 | save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */ |
| 635 | if (flags & SAVEf_KEEPOLDELEM) |
| 636 | return; |
| 637 | sv = *sptr; |
| 638 | /* If we're localizing a tied array element, this new sv |
| 639 | * won't actually be stored in the array - so it won't get |
| 640 | * reaped when the localize ends. Ensure it gets reaped by |
| 641 | * mortifying it instead. DAPM */ |
| 642 | if (UNLIKELY(SvTIED_mg((const SV *)av, PERL_MAGIC_tied))) |
| 643 | sv_2mortal(sv); |
| 644 | } |
| 645 | |
| 646 | void |
| 647 | Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags) |
| 648 | { |
| 649 | SV *sv; |
| 650 | |
| 651 | PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS; |
| 652 | |
| 653 | SvGETMAGIC(*sptr); |
| 654 | { |
| 655 | dSS_ADD; |
| 656 | SS_ADD_PTR(SvREFCNT_inc_simple(hv)); |
| 657 | SS_ADD_PTR(newSVsv(key)); |
| 658 | SS_ADD_PTR(SvREFCNT_inc(*sptr)); |
| 659 | SS_ADD_UV(SAVEt_HELEM); |
| 660 | SS_ADD_END(4); |
| 661 | } |
| 662 | save_scalar_at(sptr, flags); |
| 663 | if (flags & SAVEf_KEEPOLDELEM) |
| 664 | return; |
| 665 | sv = *sptr; |
| 666 | /* If we're localizing a tied hash element, this new sv |
| 667 | * won't actually be stored in the hash - so it won't get |
| 668 | * reaped when the localize ends. Ensure it gets reaped by |
| 669 | * mortifying it instead. DAPM */ |
| 670 | if (UNLIKELY(SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))) |
| 671 | sv_2mortal(sv); |
| 672 | } |
| 673 | |
| 674 | SV* |
| 675 | Perl_save_svref(pTHX_ SV **sptr) |
| 676 | { |
| 677 | PERL_ARGS_ASSERT_SAVE_SVREF; |
| 678 | |
| 679 | SvGETMAGIC(*sptr); |
| 680 | save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF); |
| 681 | return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */ |
| 682 | } |
| 683 | |
| 684 | I32 |
| 685 | Perl_save_alloc(pTHX_ I32 size, I32 pad) |
| 686 | { |
| 687 | const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix] |
| 688 | - (char*)PL_savestack); |
| 689 | const UV elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack)); |
| 690 | const UV elems_shifted = elems << SAVE_TIGHT_SHIFT; |
| 691 | |
| 692 | if (UNLIKELY((elems_shifted >> SAVE_TIGHT_SHIFT) != elems)) |
| 693 | Perl_croak(aTHX_ |
| 694 | "panic: save_alloc elems %"UVuf" out of range (%"IVdf"-%"IVdf")", |
| 695 | elems, (IV)size, (IV)pad); |
| 696 | |
| 697 | SSGROW(elems + 1); |
| 698 | |
| 699 | PL_savestack_ix += elems; |
| 700 | SSPUSHUV(SAVEt_ALLOC | elems_shifted); |
| 701 | return start; |
| 702 | } |
| 703 | |
| 704 | |
| 705 | |
| 706 | #define ARG0_SV MUTABLE_SV(arg0.any_ptr) |
| 707 | #define ARG0_AV MUTABLE_AV(arg0.any_ptr) |
| 708 | #define ARG0_HV MUTABLE_HV(arg0.any_ptr) |
| 709 | #define ARG0_PTR arg0.any_ptr |
| 710 | #define ARG0_PV (char*)(arg0.any_ptr) |
| 711 | #define ARG0_PVP (char**)(arg0.any_ptr) |
| 712 | #define ARG0_I32 (arg0.any_i32) |
| 713 | |
| 714 | #define ARG1_SV MUTABLE_SV(arg1.any_ptr) |
| 715 | #define ARG1_AV MUTABLE_AV(arg1.any_ptr) |
| 716 | #define ARG1_GV MUTABLE_GV(arg1.any_ptr) |
| 717 | #define ARG1_SVP (SV**)(arg1.any_ptr) |
| 718 | #define ARG1_PVP (char**)(arg1.any_ptr) |
| 719 | #define ARG1_PTR arg1.any_ptr |
| 720 | #define ARG1_PV (char*)(arg1.any_ptr) |
| 721 | #define ARG1_I32 (arg1.any_i32) |
| 722 | |
| 723 | #define ARG2_SV MUTABLE_SV(arg2.any_ptr) |
| 724 | #define ARG2_AV MUTABLE_AV(arg2.any_ptr) |
| 725 | #define ARG2_HV MUTABLE_HV(arg2.any_ptr) |
| 726 | #define ARG2_GV MUTABLE_GV(arg2.any_ptr) |
| 727 | #define ARG2_PV (char*)(arg2.any_ptr) |
| 728 | |
| 729 | void |
| 730 | Perl_leave_scope(pTHX_ I32 base) |
| 731 | { |
| 732 | /* Localise the effects of the TAINT_NOT inside the loop. */ |
| 733 | bool was = TAINT_get; |
| 734 | |
| 735 | ANY arg0, arg1, arg2; |
| 736 | |
| 737 | /* these initialisations are logically unnecessary, but they shut up |
| 738 | * spurious 'may be used uninitialized' compiler warnings */ |
| 739 | arg0.any_ptr = NULL; |
| 740 | arg1.any_ptr = NULL; |
| 741 | arg2.any_ptr = NULL; |
| 742 | |
| 743 | if (UNLIKELY(base < -1)) |
| 744 | Perl_croak(aTHX_ "panic: corrupt saved stack index %ld", (long) base); |
| 745 | DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n", |
| 746 | (long)PL_savestack_ix, (long)base)); |
| 747 | while (PL_savestack_ix > base) { |
| 748 | UV uv; |
| 749 | U8 type; |
| 750 | |
| 751 | SV *refsv; |
| 752 | SV **svp; |
| 753 | |
| 754 | TAINT_NOT; |
| 755 | |
| 756 | { |
| 757 | I32 ix = PL_savestack_ix - 1; |
| 758 | ANY *p = &PL_savestack[ix]; |
| 759 | uv = p->any_uv; |
| 760 | type = (U8)uv & SAVE_MASK; |
| 761 | if (type > SAVEt_ARG0_MAX) { |
| 762 | ANY *p0 = p; |
| 763 | arg0 = *--p; |
| 764 | if (type > SAVEt_ARG1_MAX) { |
| 765 | arg1 = *--p; |
| 766 | if (type > SAVEt_ARG2_MAX) { |
| 767 | arg2 = *--p; |
| 768 | } |
| 769 | } |
| 770 | ix -= (p0 - p); |
| 771 | } |
| 772 | PL_savestack_ix = ix; |
| 773 | } |
| 774 | |
| 775 | switch (type) { |
| 776 | case SAVEt_ITEM: /* normal string */ |
| 777 | sv_replace(ARG1_SV, ARG0_SV); |
| 778 | if (UNLIKELY(SvSMAGICAL(ARG1_SV))) { |
| 779 | PL_localizing = 2; |
| 780 | mg_set(ARG1_SV); |
| 781 | PL_localizing = 0; |
| 782 | } |
| 783 | break; |
| 784 | |
| 785 | /* This would be a mathom, but Perl_save_svref() calls a static |
| 786 | function, S_save_scalar_at(), so has to stay in this file. */ |
| 787 | case SAVEt_SVREF: /* scalar reference */ |
| 788 | svp = ARG1_SVP; |
| 789 | refsv = NULL; /* what to refcnt_dec */ |
| 790 | goto restore_sv; |
| 791 | |
| 792 | case SAVEt_SV: /* scalar reference */ |
| 793 | svp = &GvSV(ARG1_GV); |
| 794 | refsv = ARG1_SV; /* what to refcnt_dec */ |
| 795 | restore_sv: |
| 796 | { |
| 797 | SV * const sv = *svp; |
| 798 | *svp = ARG0_SV; |
| 799 | SvREFCNT_dec(sv); |
| 800 | if (UNLIKELY(SvSMAGICAL(ARG0_SV))) { |
| 801 | PL_localizing = 2; |
| 802 | mg_set(ARG0_SV); |
| 803 | PL_localizing = 0; |
| 804 | } |
| 805 | SvREFCNT_dec_NN(ARG0_SV); |
| 806 | SvREFCNT_dec(refsv); |
| 807 | break; |
| 808 | } |
| 809 | case SAVEt_GENERIC_PVREF: /* generic pv */ |
| 810 | if (*ARG0_PVP != ARG1_PV) { |
| 811 | Safefree(*ARG0_PVP); |
| 812 | *ARG0_PVP = ARG1_PV; |
| 813 | } |
| 814 | break; |
| 815 | case SAVEt_SHARED_PVREF: /* shared pv */ |
| 816 | if (*ARG1_PVP != ARG0_PV) { |
| 817 | #ifdef NETWARE |
| 818 | PerlMem_free(*ARG1_PVP); |
| 819 | #else |
| 820 | PerlMemShared_free(*ARG1_PVP); |
| 821 | #endif |
| 822 | *ARG1_PVP = ARG0_PV; |
| 823 | } |
| 824 | break; |
| 825 | case SAVEt_GVSV: /* scalar slot in GV */ |
| 826 | svp = &GvSV(ARG1_GV); |
| 827 | goto restore_svp; |
| 828 | case SAVEt_GENERIC_SVREF: /* generic sv */ |
| 829 | svp = ARG1_SVP; |
| 830 | restore_svp: |
| 831 | { |
| 832 | SV * const sv = *svp; |
| 833 | *svp = ARG0_SV; |
| 834 | SvREFCNT_dec(sv); |
| 835 | SvREFCNT_dec(ARG0_SV); |
| 836 | break; |
| 837 | } |
| 838 | case SAVEt_GVSLOT: /* any slot in GV */ |
| 839 | { |
| 840 | HV *const hv = GvSTASH(ARG2_GV); |
| 841 | svp = ARG1_SVP; |
| 842 | if (hv && HvENAME(hv) && ( |
| 843 | (ARG0_SV && SvTYPE(ARG0_SV) == SVt_PVCV) |
| 844 | || (*svp && SvTYPE(*svp) == SVt_PVCV) |
| 845 | )) |
| 846 | { |
| 847 | if ((char *)svp < (char *)GvGP(ARG2_GV) |
| 848 | || (char *)svp > (char *)GvGP(ARG2_GV) + sizeof(struct gp) |
| 849 | || GvREFCNT(ARG2_GV) > 2) /* "> 2" to ignore savestack's ref */ |
| 850 | PL_sub_generation++; |
| 851 | else mro_method_changed_in(hv); |
| 852 | } |
| 853 | goto restore_svp; |
| 854 | } |
| 855 | case SAVEt_AV: /* array reference */ |
| 856 | SvREFCNT_dec(GvAV(ARG1_GV)); |
| 857 | GvAV(ARG1_GV) = ARG0_AV; |
| 858 | if (UNLIKELY(SvSMAGICAL(ARG0_SV))) { |
| 859 | PL_localizing = 2; |
| 860 | mg_set(ARG0_SV); |
| 861 | PL_localizing = 0; |
| 862 | } |
| 863 | SvREFCNT_dec_NN(ARG1_GV); |
| 864 | break; |
| 865 | case SAVEt_HV: /* hash reference */ |
| 866 | SvREFCNT_dec(GvHV(ARG1_GV)); |
| 867 | GvHV(ARG1_GV) = ARG0_HV; |
| 868 | if (UNLIKELY(SvSMAGICAL(ARG0_SV))) { |
| 869 | PL_localizing = 2; |
| 870 | mg_set(ARG0_SV); |
| 871 | PL_localizing = 0; |
| 872 | } |
| 873 | SvREFCNT_dec_NN(ARG1_GV); |
| 874 | break; |
| 875 | case SAVEt_INT_SMALL: |
| 876 | *(int*)ARG0_PTR = (int)(uv >> SAVE_TIGHT_SHIFT); |
| 877 | break; |
| 878 | case SAVEt_INT: /* int reference */ |
| 879 | *(int*)ARG0_PTR = (int)ARG1_I32; |
| 880 | break; |
| 881 | case SAVEt_STRLEN: /* STRLEN/size_t ref */ |
| 882 | *(STRLEN*)ARG0_PTR = (STRLEN)arg1.any_iv; |
| 883 | break; |
| 884 | case SAVEt_BOOL: /* bool reference */ |
| 885 | *(bool*)ARG0_PTR = cBOOL(uv >> 8); |
| 886 | #ifdef NO_TAINT_SUPPORT |
| 887 | PERL_UNUSED_VAR(was); |
| 888 | #else |
| 889 | if (UNLIKELY(ARG0_PTR == &(TAINT_get))) { |
| 890 | /* If we don't update <was>, to reflect what was saved on the |
| 891 | * stack for PL_tainted, then we will overwrite this attempt to |
| 892 | * restore it when we exit this routine. Note that this won't |
| 893 | * work if this value was saved in a wider-than necessary type, |
| 894 | * such as I32 */ |
| 895 | was = *(bool*)ARG0_PTR; |
| 896 | } |
| 897 | #endif |
| 898 | break; |
| 899 | case SAVEt_I32_SMALL: |
| 900 | *(I32*)ARG0_PTR = (I32)(uv >> SAVE_TIGHT_SHIFT); |
| 901 | break; |
| 902 | case SAVEt_I32: /* I32 reference */ |
| 903 | #ifdef PERL_DEBUG_READONLY_OPS |
| 904 | if (*(I32*)ARG0_PTR != ARG1_I32) |
| 905 | #endif |
| 906 | *(I32*)ARG0_PTR = ARG1_I32; |
| 907 | break; |
| 908 | case SAVEt_SPTR: /* SV* reference */ |
| 909 | *(SV**)(ARG0_PTR)= ARG1_SV; |
| 910 | break; |
| 911 | case SAVEt_VPTR: /* random* reference */ |
| 912 | case SAVEt_PPTR: /* char* reference */ |
| 913 | *ARG0_PVP = ARG1_PV; |
| 914 | break; |
| 915 | case SAVEt_HPTR: /* HV* reference */ |
| 916 | *(HV**)ARG0_PTR = MUTABLE_HV(ARG1_PTR); |
| 917 | break; |
| 918 | case SAVEt_APTR: /* AV* reference */ |
| 919 | *(AV**)ARG0_PTR = ARG1_AV; |
| 920 | break; |
| 921 | case SAVEt_GP: /* scalar reference */ |
| 922 | { |
| 923 | HV *hv; |
| 924 | /* possibly taking a method out of circulation */ |
| 925 | const bool had_method = !!GvCVu(ARG1_GV); |
| 926 | gp_free(ARG1_GV); |
| 927 | GvGP_set(ARG1_GV, (GP*)ARG0_PTR); |
| 928 | if ((hv=GvSTASH(ARG1_GV)) && HvENAME_get(hv)) { |
| 929 | if ( GvNAMELEN(ARG1_GV) == 3 |
| 930 | && strnEQ(GvNAME(ARG1_GV), "ISA", 3) |
| 931 | ) |
| 932 | mro_isa_changed_in(hv); |
| 933 | else if (had_method || GvCVu(ARG1_GV)) |
| 934 | /* putting a method back into circulation ("local")*/ |
| 935 | gv_method_changed(ARG1_GV); |
| 936 | } |
| 937 | SvREFCNT_dec_NN(ARG1_GV); |
| 938 | break; |
| 939 | } |
| 940 | case SAVEt_FREESV: |
| 941 | SvREFCNT_dec(ARG0_SV); |
| 942 | break; |
| 943 | case SAVEt_FREECOPHH: |
| 944 | cophh_free((COPHH *)ARG0_PTR); |
| 945 | break; |
| 946 | case SAVEt_MORTALIZESV: |
| 947 | sv_2mortal(ARG0_SV); |
| 948 | break; |
| 949 | case SAVEt_FREEOP: |
| 950 | ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); |
| 951 | op_free((OP*)ARG0_PTR); |
| 952 | break; |
| 953 | case SAVEt_FREEPV: |
| 954 | Safefree(ARG0_PTR); |
| 955 | break; |
| 956 | |
| 957 | { |
| 958 | SV **svp; |
| 959 | I32 i; |
| 960 | SV *sv; |
| 961 | |
| 962 | case SAVEt_CLEARPADRANGE: |
| 963 | i = (I32)((uv >> SAVE_TIGHT_SHIFT) & OPpPADRANGE_COUNTMASK); |
| 964 | svp = &PL_curpad[uv >> |
| 965 | (OPpPADRANGE_COUNTSHIFT + SAVE_TIGHT_SHIFT)] + i - 1; |
| 966 | goto clearsv; |
| 967 | case SAVEt_CLEARSV: |
| 968 | svp = &PL_curpad[uv >> SAVE_TIGHT_SHIFT]; |
| 969 | i = 1; |
| 970 | clearsv: |
| 971 | for (; i; i--, svp--) { |
| 972 | sv = *svp; |
| 973 | |
| 974 | DEBUG_Xv(PerlIO_printf(Perl_debug_log, |
| 975 | "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n", |
| 976 | PTR2UV(PL_comppad), PTR2UV(PL_curpad), |
| 977 | (long)(svp-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv), |
| 978 | (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon" |
| 979 | )); |
| 980 | |
| 981 | assert(SvPADMY(sv)); |
| 982 | |
| 983 | /* Can clear pad variable in place? */ |
| 984 | if (SvREFCNT(sv) == 1 && !SvOBJECT(sv)) { |
| 985 | |
| 986 | /* these flags are the union of all the relevant flags |
| 987 | * in the individual conditions within */ |
| 988 | if (UNLIKELY(SvFLAGS(sv) & ( |
| 989 | SVf_READONLY /* for SvREADONLY_off() */ |
| 990 | | (SVs_GMG|SVs_SMG|SVs_RMG) /* SvMAGICAL() */ |
| 991 | | SVf_OOK |
| 992 | | SVf_THINKFIRST))) |
| 993 | { |
| 994 | /* if a my variable that was made readonly is |
| 995 | * going out of scope, we want to remove the |
| 996 | * readonlyness so that it can go out of scope |
| 997 | * quietly |
| 998 | */ |
| 999 | if (SvREADONLY(sv) && !SvFAKE(sv)) |
| 1000 | SvREADONLY_off(sv); |
| 1001 | |
| 1002 | if (SvOOK(sv)) { /* OOK or HvAUX */ |
| 1003 | if (SvTYPE(sv) == SVt_PVHV) |
| 1004 | Perl_hv_kill_backrefs(aTHX_ MUTABLE_HV(sv)); |
| 1005 | else |
| 1006 | sv_backoff(sv); |
| 1007 | } |
| 1008 | |
| 1009 | if (SvMAGICAL(sv)) { |
| 1010 | /* note that backrefs (either in HvAUX or magic) |
| 1011 | * must be removed before other magic */ |
| 1012 | sv_unmagic(sv, PERL_MAGIC_backref); |
| 1013 | if (SvTYPE(sv) != SVt_PVCV) |
| 1014 | mg_free(sv); |
| 1015 | } |
| 1016 | if (SvTHINKFIRST(sv)) |
| 1017 | sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF |
| 1018 | |SV_COW_DROP_PV); |
| 1019 | |
| 1020 | } |
| 1021 | switch (SvTYPE(sv)) { |
| 1022 | case SVt_NULL: |
| 1023 | break; |
| 1024 | case SVt_PVAV: |
| 1025 | av_clear(MUTABLE_AV(sv)); |
| 1026 | break; |
| 1027 | case SVt_PVHV: |
| 1028 | hv_clear(MUTABLE_HV(sv)); |
| 1029 | break; |
| 1030 | case SVt_PVCV: |
| 1031 | { |
| 1032 | HEK *hek = |
| 1033 | CvNAMED(sv) |
| 1034 | ? CvNAME_HEK((CV *)sv) |
| 1035 | : GvNAME_HEK(CvGV(sv)); |
| 1036 | assert(hek); |
| 1037 | share_hek_hek(hek); |
| 1038 | cv_undef((CV *)sv); |
| 1039 | CvNAME_HEK_set(sv, hek); |
| 1040 | CvLEXICAL_on(sv); |
| 1041 | break; |
| 1042 | } |
| 1043 | default: |
| 1044 | /* This looks odd, but these two macros are for use in |
| 1045 | expressions and finish with a trailing comma, so |
| 1046 | adding a ; after them would be wrong. */ |
| 1047 | assert_not_ROK(sv) |
| 1048 | assert_not_glob(sv) |
| 1049 | SvFLAGS(sv) &=~ (SVf_OK|SVf_IVisUV|SVf_UTF8); |
| 1050 | break; |
| 1051 | } |
| 1052 | SvPADSTALE_on(sv); /* mark as no longer live */ |
| 1053 | } |
| 1054 | else { /* Someone has a claim on this, so abandon it. */ |
| 1055 | assert( SvFLAGS(sv) & SVs_PADMY); |
| 1056 | assert(!(SvFLAGS(sv) & SVs_PADTMP)); |
| 1057 | switch (SvTYPE(sv)) { /* Console ourselves with a new value */ |
| 1058 | case SVt_PVAV: *svp = MUTABLE_SV(newAV()); break; |
| 1059 | case SVt_PVHV: *svp = MUTABLE_SV(newHV()); break; |
| 1060 | case SVt_PVCV: |
| 1061 | { |
| 1062 | HEK * const hek = CvNAMED(sv) |
| 1063 | ? CvNAME_HEK((CV *)sv) |
| 1064 | : GvNAME_HEK(CvGV(sv)); |
| 1065 | |
| 1066 | /* Create a stub */ |
| 1067 | *svp = newSV_type(SVt_PVCV); |
| 1068 | |
| 1069 | /* Share name */ |
| 1070 | CvNAME_HEK_set(*svp, |
| 1071 | share_hek_hek(hek)); |
| 1072 | CvLEXICAL_on(*svp); |
| 1073 | break; |
| 1074 | } |
| 1075 | default: *svp = newSV(0); break; |
| 1076 | } |
| 1077 | SvREFCNT_dec_NN(sv); /* Cast current value to the winds. */ |
| 1078 | /* preserve pad nature, but also mark as not live |
| 1079 | * for any closure capturing */ |
| 1080 | SvFLAGS(*svp) |= (SVs_PADMY|SVs_PADSTALE); |
| 1081 | } |
| 1082 | } |
| 1083 | break; |
| 1084 | } |
| 1085 | case SAVEt_DELETE: |
| 1086 | (void)hv_delete(ARG0_HV, ARG2_PV, ARG1_I32, G_DISCARD); |
| 1087 | SvREFCNT_dec(ARG0_HV); |
| 1088 | Safefree(arg2.any_ptr); |
| 1089 | break; |
| 1090 | case SAVEt_ADELETE: |
| 1091 | (void)av_delete(ARG0_AV, arg1.any_iv, G_DISCARD); |
| 1092 | SvREFCNT_dec(ARG0_AV); |
| 1093 | break; |
| 1094 | case SAVEt_DESTRUCTOR_X: |
| 1095 | (*arg1.any_dxptr)(aTHX_ ARG0_PTR); |
| 1096 | break; |
| 1097 | case SAVEt_REGCONTEXT: |
| 1098 | /* regexp must have croaked */ |
| 1099 | case SAVEt_ALLOC: |
| 1100 | PL_savestack_ix -= uv >> SAVE_TIGHT_SHIFT; |
| 1101 | break; |
| 1102 | case SAVEt_STACK_POS: /* Position on Perl stack */ |
| 1103 | PL_stack_sp = PL_stack_base + arg0.any_i32; |
| 1104 | break; |
| 1105 | case SAVEt_AELEM: /* array element */ |
| 1106 | svp = av_fetch(ARG2_AV, arg1.any_iv, 1); |
| 1107 | if (UNLIKELY(!AvREAL(ARG2_AV) && AvREIFY(ARG2_AV))) /* undo reify guard */ |
| 1108 | SvREFCNT_dec(ARG0_SV); |
| 1109 | if (LIKELY(svp)) { |
| 1110 | SV * const sv = *svp; |
| 1111 | if (LIKELY(sv && sv != &PL_sv_undef)) { |
| 1112 | if (UNLIKELY(SvTIED_mg((const SV *)ARG2_AV, PERL_MAGIC_tied))) |
| 1113 | SvREFCNT_inc_void_NN(sv); |
| 1114 | refsv = ARG2_SV; |
| 1115 | goto restore_sv; |
| 1116 | } |
| 1117 | } |
| 1118 | SvREFCNT_dec(ARG2_AV); |
| 1119 | SvREFCNT_dec(ARG0_SV); |
| 1120 | break; |
| 1121 | case SAVEt_HELEM: /* hash element */ |
| 1122 | { |
| 1123 | HE * const he = hv_fetch_ent(ARG2_HV, ARG1_SV, 1, 0); |
| 1124 | SvREFCNT_dec(ARG1_SV); |
| 1125 | if (LIKELY(he)) { |
| 1126 | const SV * const oval = HeVAL(he); |
| 1127 | if (LIKELY(oval && oval != &PL_sv_undef)) { |
| 1128 | svp = &HeVAL(he); |
| 1129 | if (UNLIKELY(SvTIED_mg((const SV *)ARG2_HV, PERL_MAGIC_tied))) |
| 1130 | SvREFCNT_inc_void(*svp); |
| 1131 | refsv = ARG2_SV; /* what to refcnt_dec */ |
| 1132 | goto restore_sv; |
| 1133 | } |
| 1134 | } |
| 1135 | SvREFCNT_dec(ARG2_HV); |
| 1136 | SvREFCNT_dec(ARG0_SV); |
| 1137 | break; |
| 1138 | } |
| 1139 | case SAVEt_OP: |
| 1140 | PL_op = (OP*)ARG0_PTR; |
| 1141 | break; |
| 1142 | case SAVEt_HINTS: |
| 1143 | if ((PL_hints & HINT_LOCALIZE_HH)) { |
| 1144 | while (GvHV(PL_hintgv)) { |
| 1145 | HV *hv = GvHV(PL_hintgv); |
| 1146 | GvHV(PL_hintgv) = NULL; |
| 1147 | SvREFCNT_dec(MUTABLE_SV(hv)); |
| 1148 | } |
| 1149 | } |
| 1150 | cophh_free(CopHINTHASH_get(&PL_compiling)); |
| 1151 | CopHINTHASH_set(&PL_compiling, (COPHH*)ARG0_PTR); |
| 1152 | *(I32*)&PL_hints = ARG1_I32; |
| 1153 | if (PL_hints & HINT_LOCALIZE_HH) { |
| 1154 | SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv))); |
| 1155 | GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR); |
| 1156 | } |
| 1157 | if (!GvHV(PL_hintgv)) { |
| 1158 | /* Need to add a new one manually, else rv2hv can |
| 1159 | add one via GvHVn and it won't have the magic set. */ |
| 1160 | HV *const hv = newHV(); |
| 1161 | hv_magic(hv, NULL, PERL_MAGIC_hints); |
| 1162 | GvHV(PL_hintgv) = hv; |
| 1163 | } |
| 1164 | assert(GvHV(PL_hintgv)); |
| 1165 | break; |
| 1166 | case SAVEt_COMPPAD: |
| 1167 | PL_comppad = (PAD*)ARG0_PTR; |
| 1168 | if (LIKELY(PL_comppad)) |
| 1169 | PL_curpad = AvARRAY(PL_comppad); |
| 1170 | else |
| 1171 | PL_curpad = NULL; |
| 1172 | break; |
| 1173 | case SAVEt_PADSV_AND_MORTALIZE: |
| 1174 | { |
| 1175 | SV **svp; |
| 1176 | assert (ARG1_PTR); |
| 1177 | svp = AvARRAY((PAD*)ARG1_PTR) + (PADOFFSET)arg0.any_uv; |
| 1178 | /* This mortalizing used to be done by POPLOOP() via itersave. |
| 1179 | But as we have all the information here, we can do it here, |
| 1180 | save even having to have itersave in the struct. */ |
| 1181 | sv_2mortal(*svp); |
| 1182 | *svp = ARG2_SV; |
| 1183 | } |
| 1184 | break; |
| 1185 | case SAVEt_SAVESWITCHSTACK: |
| 1186 | { |
| 1187 | dSP; |
| 1188 | SWITCHSTACK(ARG0_AV, ARG1_AV); |
| 1189 | PL_curstackinfo->si_stack = ARG1_AV; |
| 1190 | } |
| 1191 | break; |
| 1192 | case SAVEt_SET_SVFLAGS: |
| 1193 | SvFLAGS(ARG2_SV) &= ~((U32)ARG1_I32); |
| 1194 | SvFLAGS(ARG2_SV) |= (U32)ARG0_I32; |
| 1195 | break; |
| 1196 | |
| 1197 | /* These are only saved in mathoms.c */ |
| 1198 | case SAVEt_NSTAB: |
| 1199 | (void)sv_clear(ARG0_SV); |
| 1200 | break; |
| 1201 | case SAVEt_LONG: /* long reference */ |
| 1202 | *(long*)ARG0_PTR = arg1.any_long; |
| 1203 | break; |
| 1204 | case SAVEt_IV: /* IV reference */ |
| 1205 | *(IV*)ARG0_PTR = arg1.any_iv; |
| 1206 | break; |
| 1207 | |
| 1208 | case SAVEt_I16: /* I16 reference */ |
| 1209 | *(I16*)ARG0_PTR = (I16)(uv >> 8); |
| 1210 | break; |
| 1211 | case SAVEt_I8: /* I8 reference */ |
| 1212 | *(I8*)ARG0_PTR = (I8)(uv >> 8); |
| 1213 | break; |
| 1214 | case SAVEt_DESTRUCTOR: |
| 1215 | (*arg1.any_dptr)(ARG0_PTR); |
| 1216 | break; |
| 1217 | case SAVEt_COMPILE_WARNINGS: |
| 1218 | if (!specialWARN(PL_compiling.cop_warnings)) |
| 1219 | PerlMemShared_free(PL_compiling.cop_warnings); |
| 1220 | |
| 1221 | PL_compiling.cop_warnings = (STRLEN*)ARG0_PTR; |
| 1222 | break; |
| 1223 | case SAVEt_PARSER: |
| 1224 | parser_free((yy_parser *) ARG0_PTR); |
| 1225 | break; |
| 1226 | case SAVEt_READONLY_OFF: |
| 1227 | SvREADONLY_off(ARG0_SV); |
| 1228 | break; |
| 1229 | default: |
| 1230 | Perl_croak(aTHX_ "panic: leave_scope inconsistency %u", type); |
| 1231 | } |
| 1232 | } |
| 1233 | |
| 1234 | TAINT_set(was); |
| 1235 | } |
| 1236 | |
| 1237 | void |
| 1238 | Perl_cx_dump(pTHX_ PERL_CONTEXT *cx) |
| 1239 | { |
| 1240 | PERL_ARGS_ASSERT_CX_DUMP; |
| 1241 | |
| 1242 | #ifdef DEBUGGING |
| 1243 | PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]); |
| 1244 | if (CxTYPE(cx) != CXt_SUBST) { |
| 1245 | const char *gimme_text; |
| 1246 | PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp); |
| 1247 | PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n", |
| 1248 | PTR2UV(cx->blk_oldcop)); |
| 1249 | PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp); |
| 1250 | PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp); |
| 1251 | PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n", |
| 1252 | PTR2UV(cx->blk_oldpm)); |
| 1253 | switch (cx->blk_gimme) { |
| 1254 | case G_VOID: |
| 1255 | gimme_text = "VOID"; |
| 1256 | break; |
| 1257 | case G_SCALAR: |
| 1258 | gimme_text = "SCALAR"; |
| 1259 | break; |
| 1260 | case G_ARRAY: |
| 1261 | gimme_text = "LIST"; |
| 1262 | break; |
| 1263 | default: |
| 1264 | gimme_text = "UNKNOWN"; |
| 1265 | break; |
| 1266 | } |
| 1267 | PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", gimme_text); |
| 1268 | } |
| 1269 | switch (CxTYPE(cx)) { |
| 1270 | case CXt_NULL: |
| 1271 | case CXt_BLOCK: |
| 1272 | break; |
| 1273 | case CXt_FORMAT: |
| 1274 | PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n", |
| 1275 | PTR2UV(cx->blk_format.cv)); |
| 1276 | PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n", |
| 1277 | PTR2UV(cx->blk_format.gv)); |
| 1278 | PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n", |
| 1279 | PTR2UV(cx->blk_format.dfoutgv)); |
| 1280 | PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n", |
| 1281 | (int)CxHASARGS(cx)); |
| 1282 | PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n", |
| 1283 | PTR2UV(cx->blk_format.retop)); |
| 1284 | break; |
| 1285 | case CXt_SUB: |
| 1286 | PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n", |
| 1287 | PTR2UV(cx->blk_sub.cv)); |
| 1288 | PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n", |
| 1289 | (long)cx->blk_sub.olddepth); |
| 1290 | PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n", |
| 1291 | (int)CxHASARGS(cx)); |
| 1292 | PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx)); |
| 1293 | PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n", |
| 1294 | PTR2UV(cx->blk_sub.retop)); |
| 1295 | break; |
| 1296 | case CXt_EVAL: |
| 1297 | PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n", |
| 1298 | (long)CxOLD_IN_EVAL(cx)); |
| 1299 | PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n", |
| 1300 | PL_op_name[CxOLD_OP_TYPE(cx)], |
| 1301 | PL_op_desc[CxOLD_OP_TYPE(cx)]); |
| 1302 | if (cx->blk_eval.old_namesv) |
| 1303 | PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n", |
| 1304 | SvPVX_const(cx->blk_eval.old_namesv)); |
| 1305 | PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n", |
| 1306 | PTR2UV(cx->blk_eval.old_eval_root)); |
| 1307 | PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n", |
| 1308 | PTR2UV(cx->blk_eval.retop)); |
| 1309 | break; |
| 1310 | |
| 1311 | case CXt_LOOP_LAZYIV: |
| 1312 | case CXt_LOOP_LAZYSV: |
| 1313 | case CXt_LOOP_FOR: |
| 1314 | case CXt_LOOP_PLAIN: |
| 1315 | PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx)); |
| 1316 | PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n", |
| 1317 | (long)cx->blk_loop.resetsp); |
| 1318 | PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n", |
| 1319 | PTR2UV(cx->blk_loop.my_op)); |
| 1320 | /* XXX: not accurate for LAZYSV/IV */ |
| 1321 | PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n", |
| 1322 | PTR2UV(cx->blk_loop.state_u.ary.ary)); |
| 1323 | PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n", |
| 1324 | (long)cx->blk_loop.state_u.ary.ix); |
| 1325 | PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n", |
| 1326 | PTR2UV(CxITERVAR(cx))); |
| 1327 | break; |
| 1328 | |
| 1329 | case CXt_SUBST: |
| 1330 | PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n", |
| 1331 | (long)cx->sb_iters); |
| 1332 | PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n", |
| 1333 | (long)cx->sb_maxiters); |
| 1334 | PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n", |
| 1335 | (long)cx->sb_rflags); |
| 1336 | PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n", |
| 1337 | (long)CxONCE(cx)); |
| 1338 | PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n", |
| 1339 | cx->sb_orig); |
| 1340 | PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n", |
| 1341 | PTR2UV(cx->sb_dstr)); |
| 1342 | PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n", |
| 1343 | PTR2UV(cx->sb_targ)); |
| 1344 | PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n", |
| 1345 | PTR2UV(cx->sb_s)); |
| 1346 | PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n", |
| 1347 | PTR2UV(cx->sb_m)); |
| 1348 | PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n", |
| 1349 | PTR2UV(cx->sb_strend)); |
| 1350 | PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n", |
| 1351 | PTR2UV(cx->sb_rxres)); |
| 1352 | break; |
| 1353 | } |
| 1354 | #else |
| 1355 | PERL_UNUSED_CONTEXT; |
| 1356 | PERL_UNUSED_ARG(cx); |
| 1357 | #endif /* DEBUGGING */ |
| 1358 | } |
| 1359 | |
| 1360 | /* |
| 1361 | * Local variables: |
| 1362 | * c-indentation-style: bsd |
| 1363 | * c-basic-offset: 4 |
| 1364 | * indent-tabs-mode: nil |
| 1365 | * End: |
| 1366 | * |
| 1367 | * ex: set ts=8 sts=4 sw=4 et: |
| 1368 | */ |