| 1 | /* util.c |
| 2 | * |
| 3 | * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 4 | * 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 | * 'Very useful, no doubt, that was to Saruman; yet it seems that he was |
| 13 | * not content.' --Gandalf to Pippin |
| 14 | * |
| 15 | * [p.598 of _The Lord of the Rings_, III/xi: "The PalantÃr"] |
| 16 | */ |
| 17 | |
| 18 | /* This file contains assorted utility routines. |
| 19 | * Which is a polite way of saying any stuff that people couldn't think of |
| 20 | * a better place for. Amongst other things, it includes the warning and |
| 21 | * dieing stuff, plus wrappers for malloc code. |
| 22 | */ |
| 23 | |
| 24 | #include "EXTERN.h" |
| 25 | #define PERL_IN_UTIL_C |
| 26 | #include "perl.h" |
| 27 | #include "reentr.h" |
| 28 | |
| 29 | #if defined(USE_PERLIO) |
| 30 | #include "perliol.h" /* For PerlIOUnix_refcnt */ |
| 31 | #endif |
| 32 | |
| 33 | #ifndef PERL_MICRO |
| 34 | #include <signal.h> |
| 35 | #ifndef SIG_ERR |
| 36 | # define SIG_ERR ((Sighandler_t) -1) |
| 37 | #endif |
| 38 | #endif |
| 39 | |
| 40 | #include <math.h> |
| 41 | #include <stdlib.h> |
| 42 | |
| 43 | #ifdef __Lynx__ |
| 44 | /* Missing protos on LynxOS */ |
| 45 | int putenv(char *); |
| 46 | #endif |
| 47 | |
| 48 | #ifdef HAS_SELECT |
| 49 | # ifdef I_SYS_SELECT |
| 50 | # include <sys/select.h> |
| 51 | # endif |
| 52 | #endif |
| 53 | |
| 54 | #ifdef USE_C_BACKTRACE |
| 55 | # ifdef I_BFD |
| 56 | # define USE_BFD |
| 57 | # ifdef PERL_DARWIN |
| 58 | # undef USE_BFD /* BFD is useless in OS X. */ |
| 59 | # endif |
| 60 | # ifdef USE_BFD |
| 61 | # include <bfd.h> |
| 62 | # endif |
| 63 | # endif |
| 64 | # ifdef I_DLFCN |
| 65 | # include <dlfcn.h> |
| 66 | # endif |
| 67 | # ifdef I_EXECINFO |
| 68 | # include <execinfo.h> |
| 69 | # endif |
| 70 | #endif |
| 71 | |
| 72 | #ifdef PERL_DEBUG_READONLY_COW |
| 73 | # include <sys/mman.h> |
| 74 | #endif |
| 75 | |
| 76 | #define FLUSH |
| 77 | |
| 78 | /* NOTE: Do not call the next three routines directly. Use the macros |
| 79 | * in handy.h, so that we can easily redefine everything to do tracking of |
| 80 | * allocated hunks back to the original New to track down any memory leaks. |
| 81 | * XXX This advice seems to be widely ignored :-( --AD August 1996. |
| 82 | */ |
| 83 | |
| 84 | #if defined (DEBUGGING) || defined(PERL_IMPLICIT_SYS) || defined (PERL_TRACK_MEMPOOL) |
| 85 | # define ALWAYS_NEED_THX |
| 86 | #endif |
| 87 | |
| 88 | #if defined(PERL_TRACK_MEMPOOL) && defined(PERL_DEBUG_READONLY_COW) |
| 89 | static void |
| 90 | S_maybe_protect_rw(pTHX_ struct perl_memory_debug_header *header) |
| 91 | { |
| 92 | if (header->readonly |
| 93 | && mprotect(header, header->size, PROT_READ|PROT_WRITE)) |
| 94 | Perl_warn(aTHX_ "mprotect for COW string %p %lu failed with %d", |
| 95 | header, header->size, errno); |
| 96 | } |
| 97 | |
| 98 | static void |
| 99 | S_maybe_protect_ro(pTHX_ struct perl_memory_debug_header *header) |
| 100 | { |
| 101 | if (header->readonly |
| 102 | && mprotect(header, header->size, PROT_READ)) |
| 103 | Perl_warn(aTHX_ "mprotect RW for COW string %p %lu failed with %d", |
| 104 | header, header->size, errno); |
| 105 | } |
| 106 | # define maybe_protect_rw(foo) S_maybe_protect_rw(aTHX_ foo) |
| 107 | # define maybe_protect_ro(foo) S_maybe_protect_ro(aTHX_ foo) |
| 108 | #else |
| 109 | # define maybe_protect_rw(foo) NOOP |
| 110 | # define maybe_protect_ro(foo) NOOP |
| 111 | #endif |
| 112 | |
| 113 | #if defined(PERL_TRACK_MEMPOOL) || defined(PERL_DEBUG_READONLY_COW) |
| 114 | /* Use memory_debug_header */ |
| 115 | # define USE_MDH |
| 116 | # if (defined(PERL_POISON) && defined(PERL_TRACK_MEMPOOL)) \ |
| 117 | || defined(PERL_DEBUG_READONLY_COW) |
| 118 | # define MDH_HAS_SIZE |
| 119 | # endif |
| 120 | #endif |
| 121 | |
| 122 | /* paranoid version of system's malloc() */ |
| 123 | |
| 124 | Malloc_t |
| 125 | Perl_safesysmalloc(MEM_SIZE size) |
| 126 | { |
| 127 | #ifdef ALWAYS_NEED_THX |
| 128 | dTHX; |
| 129 | #endif |
| 130 | Malloc_t ptr; |
| 131 | |
| 132 | #ifdef USE_MDH |
| 133 | if (size + PERL_MEMORY_DEBUG_HEADER_SIZE < size) |
| 134 | goto out_of_memory; |
| 135 | size += PERL_MEMORY_DEBUG_HEADER_SIZE; |
| 136 | #endif |
| 137 | #ifdef DEBUGGING |
| 138 | if ((SSize_t)size < 0) |
| 139 | Perl_croak_nocontext("panic: malloc, size=%"UVuf, (UV) size); |
| 140 | #endif |
| 141 | if (!size) size = 1; /* malloc(0) is NASTY on our system */ |
| 142 | #ifdef PERL_DEBUG_READONLY_COW |
| 143 | if ((ptr = mmap(0, size, PROT_READ|PROT_WRITE, |
| 144 | MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) { |
| 145 | perror("mmap failed"); |
| 146 | abort(); |
| 147 | } |
| 148 | #else |
| 149 | ptr = (Malloc_t)PerlMem_malloc(size?size:1); |
| 150 | #endif |
| 151 | PERL_ALLOC_CHECK(ptr); |
| 152 | if (ptr != NULL) { |
| 153 | #ifdef USE_MDH |
| 154 | struct perl_memory_debug_header *const header |
| 155 | = (struct perl_memory_debug_header *)ptr; |
| 156 | #endif |
| 157 | |
| 158 | #ifdef PERL_POISON |
| 159 | PoisonNew(((char *)ptr), size, char); |
| 160 | #endif |
| 161 | |
| 162 | #ifdef PERL_TRACK_MEMPOOL |
| 163 | header->interpreter = aTHX; |
| 164 | /* Link us into the list. */ |
| 165 | header->prev = &PL_memory_debug_header; |
| 166 | header->next = PL_memory_debug_header.next; |
| 167 | PL_memory_debug_header.next = header; |
| 168 | maybe_protect_rw(header->next); |
| 169 | header->next->prev = header; |
| 170 | maybe_protect_ro(header->next); |
| 171 | # ifdef PERL_DEBUG_READONLY_COW |
| 172 | header->readonly = 0; |
| 173 | # endif |
| 174 | #endif |
| 175 | #ifdef MDH_HAS_SIZE |
| 176 | header->size = size; |
| 177 | #endif |
| 178 | ptr = (Malloc_t)((char*)ptr+PERL_MEMORY_DEBUG_HEADER_SIZE); |
| 179 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) malloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); |
| 180 | |
| 181 | } |
| 182 | else { |
| 183 | #ifdef USE_MDH |
| 184 | out_of_memory: |
| 185 | #endif |
| 186 | { |
| 187 | #ifndef ALWAYS_NEED_THX |
| 188 | dTHX; |
| 189 | #endif |
| 190 | if (PL_nomemok) |
| 191 | ptr = NULL; |
| 192 | else |
| 193 | croak_no_mem(); |
| 194 | } |
| 195 | } |
| 196 | return ptr; |
| 197 | } |
| 198 | |
| 199 | /* paranoid version of system's realloc() */ |
| 200 | |
| 201 | Malloc_t |
| 202 | Perl_safesysrealloc(Malloc_t where,MEM_SIZE size) |
| 203 | { |
| 204 | #ifdef ALWAYS_NEED_THX |
| 205 | dTHX; |
| 206 | #endif |
| 207 | Malloc_t ptr; |
| 208 | #ifdef PERL_DEBUG_READONLY_COW |
| 209 | const MEM_SIZE oldsize = where |
| 210 | ? ((struct perl_memory_debug_header *)((char *)where - PERL_MEMORY_DEBUG_HEADER_SIZE))->size |
| 211 | : 0; |
| 212 | #endif |
| 213 | #if !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) && !defined(PERL_MICRO) |
| 214 | Malloc_t PerlMem_realloc(); |
| 215 | #endif /* !defined(STANDARD_C) && !defined(HAS_REALLOC_PROTOTYPE) */ |
| 216 | |
| 217 | if (!size) { |
| 218 | safesysfree(where); |
| 219 | ptr = NULL; |
| 220 | } |
| 221 | else if (!where) { |
| 222 | ptr = safesysmalloc(size); |
| 223 | } |
| 224 | else { |
| 225 | #ifdef USE_MDH |
| 226 | where = (Malloc_t)((char*)where-PERL_MEMORY_DEBUG_HEADER_SIZE); |
| 227 | if (size + PERL_MEMORY_DEBUG_HEADER_SIZE < size) |
| 228 | goto out_of_memory; |
| 229 | size += PERL_MEMORY_DEBUG_HEADER_SIZE; |
| 230 | { |
| 231 | struct perl_memory_debug_header *const header |
| 232 | = (struct perl_memory_debug_header *)where; |
| 233 | |
| 234 | # ifdef PERL_TRACK_MEMPOOL |
| 235 | if (header->interpreter != aTHX) { |
| 236 | Perl_croak_nocontext("panic: realloc from wrong pool, %p!=%p", |
| 237 | header->interpreter, aTHX); |
| 238 | } |
| 239 | assert(header->next->prev == header); |
| 240 | assert(header->prev->next == header); |
| 241 | # ifdef PERL_POISON |
| 242 | if (header->size > size) { |
| 243 | const MEM_SIZE freed_up = header->size - size; |
| 244 | char *start_of_freed = ((char *)where) + size; |
| 245 | PoisonFree(start_of_freed, freed_up, char); |
| 246 | } |
| 247 | # endif |
| 248 | # endif |
| 249 | # ifdef MDH_HAS_SIZE |
| 250 | header->size = size; |
| 251 | # endif |
| 252 | } |
| 253 | #endif |
| 254 | #ifdef DEBUGGING |
| 255 | if ((SSize_t)size < 0) |
| 256 | Perl_croak_nocontext("panic: realloc, size=%"UVuf, (UV)size); |
| 257 | #endif |
| 258 | #ifdef PERL_DEBUG_READONLY_COW |
| 259 | if ((ptr = mmap(0, size, PROT_READ|PROT_WRITE, |
| 260 | MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) { |
| 261 | perror("mmap failed"); |
| 262 | abort(); |
| 263 | } |
| 264 | Copy(where,ptr,oldsize < size ? oldsize : size,char); |
| 265 | if (munmap(where, oldsize)) { |
| 266 | perror("munmap failed"); |
| 267 | abort(); |
| 268 | } |
| 269 | #else |
| 270 | ptr = (Malloc_t)PerlMem_realloc(where,size); |
| 271 | #endif |
| 272 | PERL_ALLOC_CHECK(ptr); |
| 273 | |
| 274 | /* MUST do this fixup first, before doing ANYTHING else, as anything else |
| 275 | might allocate memory/free/move memory, and until we do the fixup, it |
| 276 | may well be chasing (and writing to) free memory. */ |
| 277 | if (ptr != NULL) { |
| 278 | #ifdef PERL_TRACK_MEMPOOL |
| 279 | struct perl_memory_debug_header *const header |
| 280 | = (struct perl_memory_debug_header *)ptr; |
| 281 | |
| 282 | # ifdef PERL_POISON |
| 283 | if (header->size < size) { |
| 284 | const MEM_SIZE fresh = size - header->size; |
| 285 | char *start_of_fresh = ((char *)ptr) + size; |
| 286 | PoisonNew(start_of_fresh, fresh, char); |
| 287 | } |
| 288 | # endif |
| 289 | |
| 290 | maybe_protect_rw(header->next); |
| 291 | header->next->prev = header; |
| 292 | maybe_protect_ro(header->next); |
| 293 | maybe_protect_rw(header->prev); |
| 294 | header->prev->next = header; |
| 295 | maybe_protect_ro(header->prev); |
| 296 | #endif |
| 297 | ptr = (Malloc_t)((char*)ptr+PERL_MEMORY_DEBUG_HEADER_SIZE); |
| 298 | } |
| 299 | |
| 300 | /* In particular, must do that fixup above before logging anything via |
| 301 | *printf(), as it can reallocate memory, which can cause SEGVs. */ |
| 302 | |
| 303 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) rfree\n",PTR2UV(where),(long)PL_an++)); |
| 304 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) realloc %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)size)); |
| 305 | |
| 306 | if (ptr == NULL) { |
| 307 | #ifdef USE_MDH |
| 308 | out_of_memory: |
| 309 | #endif |
| 310 | { |
| 311 | #ifndef ALWAYS_NEED_THX |
| 312 | dTHX; |
| 313 | #endif |
| 314 | if (PL_nomemok) |
| 315 | ptr = NULL; |
| 316 | else |
| 317 | croak_no_mem(); |
| 318 | } |
| 319 | } |
| 320 | } |
| 321 | return ptr; |
| 322 | } |
| 323 | |
| 324 | /* safe version of system's free() */ |
| 325 | |
| 326 | Free_t |
| 327 | Perl_safesysfree(Malloc_t where) |
| 328 | { |
| 329 | #ifdef ALWAYS_NEED_THX |
| 330 | dTHX; |
| 331 | #endif |
| 332 | DEBUG_m( PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) free\n",PTR2UV(where),(long)PL_an++)); |
| 333 | if (where) { |
| 334 | #ifdef USE_MDH |
| 335 | Malloc_t where_intrn = (Malloc_t)((char*)where-PERL_MEMORY_DEBUG_HEADER_SIZE); |
| 336 | { |
| 337 | struct perl_memory_debug_header *const header |
| 338 | = (struct perl_memory_debug_header *)where_intrn; |
| 339 | |
| 340 | # ifdef MDH_HAS_SIZE |
| 341 | const MEM_SIZE size = header->size; |
| 342 | # endif |
| 343 | # ifdef PERL_TRACK_MEMPOOL |
| 344 | if (header->interpreter != aTHX) { |
| 345 | Perl_croak_nocontext("panic: free from wrong pool, %p!=%p", |
| 346 | header->interpreter, aTHX); |
| 347 | } |
| 348 | if (!header->prev) { |
| 349 | Perl_croak_nocontext("panic: duplicate free"); |
| 350 | } |
| 351 | if (!(header->next)) |
| 352 | Perl_croak_nocontext("panic: bad free, header->next==NULL"); |
| 353 | if (header->next->prev != header || header->prev->next != header) { |
| 354 | Perl_croak_nocontext("panic: bad free, ->next->prev=%p, " |
| 355 | "header=%p, ->prev->next=%p", |
| 356 | header->next->prev, header, |
| 357 | header->prev->next); |
| 358 | } |
| 359 | /* Unlink us from the chain. */ |
| 360 | maybe_protect_rw(header->next); |
| 361 | header->next->prev = header->prev; |
| 362 | maybe_protect_ro(header->next); |
| 363 | maybe_protect_rw(header->prev); |
| 364 | header->prev->next = header->next; |
| 365 | maybe_protect_ro(header->prev); |
| 366 | maybe_protect_rw(header); |
| 367 | # ifdef PERL_POISON |
| 368 | PoisonNew(where_intrn, size, char); |
| 369 | # endif |
| 370 | /* Trigger the duplicate free warning. */ |
| 371 | header->next = NULL; |
| 372 | # endif |
| 373 | # ifdef PERL_DEBUG_READONLY_COW |
| 374 | if (munmap(where_intrn, size)) { |
| 375 | perror("munmap failed"); |
| 376 | abort(); |
| 377 | } |
| 378 | # endif |
| 379 | } |
| 380 | #else |
| 381 | Malloc_t where_intrn = where; |
| 382 | #endif /* USE_MDH */ |
| 383 | #ifndef PERL_DEBUG_READONLY_COW |
| 384 | PerlMem_free(where_intrn); |
| 385 | #endif |
| 386 | } |
| 387 | } |
| 388 | |
| 389 | /* safe version of system's calloc() */ |
| 390 | |
| 391 | Malloc_t |
| 392 | Perl_safesyscalloc(MEM_SIZE count, MEM_SIZE size) |
| 393 | { |
| 394 | #ifdef ALWAYS_NEED_THX |
| 395 | dTHX; |
| 396 | #endif |
| 397 | Malloc_t ptr; |
| 398 | #if defined(USE_MDH) || defined(DEBUGGING) |
| 399 | MEM_SIZE total_size = 0; |
| 400 | #endif |
| 401 | |
| 402 | /* Even though calloc() for zero bytes is strange, be robust. */ |
| 403 | if (size && (count <= MEM_SIZE_MAX / size)) { |
| 404 | #if defined(USE_MDH) || defined(DEBUGGING) |
| 405 | total_size = size * count; |
| 406 | #endif |
| 407 | } |
| 408 | else |
| 409 | croak_memory_wrap(); |
| 410 | #ifdef USE_MDH |
| 411 | if (PERL_MEMORY_DEBUG_HEADER_SIZE <= MEM_SIZE_MAX - (MEM_SIZE)total_size) |
| 412 | total_size += PERL_MEMORY_DEBUG_HEADER_SIZE; |
| 413 | else |
| 414 | croak_memory_wrap(); |
| 415 | #endif |
| 416 | #ifdef DEBUGGING |
| 417 | if ((SSize_t)size < 0 || (SSize_t)count < 0) |
| 418 | Perl_croak_nocontext("panic: calloc, size=%"UVuf", count=%"UVuf, |
| 419 | (UV)size, (UV)count); |
| 420 | #endif |
| 421 | #ifdef PERL_DEBUG_READONLY_COW |
| 422 | if ((ptr = mmap(0, total_size ? total_size : 1, PROT_READ|PROT_WRITE, |
| 423 | MAP_ANON|MAP_PRIVATE, -1, 0)) == MAP_FAILED) { |
| 424 | perror("mmap failed"); |
| 425 | abort(); |
| 426 | } |
| 427 | #elif defined(PERL_TRACK_MEMPOOL) |
| 428 | /* Have to use malloc() because we've added some space for our tracking |
| 429 | header. */ |
| 430 | /* malloc(0) is non-portable. */ |
| 431 | ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1); |
| 432 | #else |
| 433 | /* Use calloc() because it might save a memset() if the memory is fresh |
| 434 | and clean from the OS. */ |
| 435 | if (count && size) |
| 436 | ptr = (Malloc_t)PerlMem_calloc(count, size); |
| 437 | else /* calloc(0) is non-portable. */ |
| 438 | ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1); |
| 439 | #endif |
| 440 | PERL_ALLOC_CHECK(ptr); |
| 441 | DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size)); |
| 442 | if (ptr != NULL) { |
| 443 | #ifdef USE_MDH |
| 444 | { |
| 445 | struct perl_memory_debug_header *const header |
| 446 | = (struct perl_memory_debug_header *)ptr; |
| 447 | |
| 448 | # ifndef PERL_DEBUG_READONLY_COW |
| 449 | memset((void*)ptr, 0, total_size); |
| 450 | # endif |
| 451 | # ifdef PERL_TRACK_MEMPOOL |
| 452 | header->interpreter = aTHX; |
| 453 | /* Link us into the list. */ |
| 454 | header->prev = &PL_memory_debug_header; |
| 455 | header->next = PL_memory_debug_header.next; |
| 456 | PL_memory_debug_header.next = header; |
| 457 | maybe_protect_rw(header->next); |
| 458 | header->next->prev = header; |
| 459 | maybe_protect_ro(header->next); |
| 460 | # ifdef PERL_DEBUG_READONLY_COW |
| 461 | header->readonly = 0; |
| 462 | # endif |
| 463 | # endif |
| 464 | # ifdef MDH_HAS_SIZE |
| 465 | header->size = total_size; |
| 466 | # endif |
| 467 | ptr = (Malloc_t)((char*)ptr+PERL_MEMORY_DEBUG_HEADER_SIZE); |
| 468 | } |
| 469 | #endif |
| 470 | return ptr; |
| 471 | } |
| 472 | else { |
| 473 | #ifndef ALWAYS_NEED_THX |
| 474 | dTHX; |
| 475 | #endif |
| 476 | if (PL_nomemok) |
| 477 | return NULL; |
| 478 | croak_no_mem(); |
| 479 | } |
| 480 | } |
| 481 | |
| 482 | /* These must be defined when not using Perl's malloc for binary |
| 483 | * compatibility */ |
| 484 | |
| 485 | #ifndef MYMALLOC |
| 486 | |
| 487 | Malloc_t Perl_malloc (MEM_SIZE nbytes) |
| 488 | { |
| 489 | #ifdef PERL_IMPLICIT_SYS |
| 490 | dTHX; |
| 491 | #endif |
| 492 | return (Malloc_t)PerlMem_malloc(nbytes); |
| 493 | } |
| 494 | |
| 495 | Malloc_t Perl_calloc (MEM_SIZE elements, MEM_SIZE size) |
| 496 | { |
| 497 | #ifdef PERL_IMPLICIT_SYS |
| 498 | dTHX; |
| 499 | #endif |
| 500 | return (Malloc_t)PerlMem_calloc(elements, size); |
| 501 | } |
| 502 | |
| 503 | Malloc_t Perl_realloc (Malloc_t where, MEM_SIZE nbytes) |
| 504 | { |
| 505 | #ifdef PERL_IMPLICIT_SYS |
| 506 | dTHX; |
| 507 | #endif |
| 508 | return (Malloc_t)PerlMem_realloc(where, nbytes); |
| 509 | } |
| 510 | |
| 511 | Free_t Perl_mfree (Malloc_t where) |
| 512 | { |
| 513 | #ifdef PERL_IMPLICIT_SYS |
| 514 | dTHX; |
| 515 | #endif |
| 516 | PerlMem_free(where); |
| 517 | } |
| 518 | |
| 519 | #endif |
| 520 | |
| 521 | /* copy a string up to some (non-backslashed) delimiter, if any */ |
| 522 | |
| 523 | char * |
| 524 | Perl_delimcpy(char *to, const char *toend, const char *from, const char *fromend, int delim, I32 *retlen) |
| 525 | { |
| 526 | I32 tolen; |
| 527 | |
| 528 | PERL_ARGS_ASSERT_DELIMCPY; |
| 529 | |
| 530 | for (tolen = 0; from < fromend; from++, tolen++) { |
| 531 | if (*from == '\\') { |
| 532 | if (from[1] != delim) { |
| 533 | if (to < toend) |
| 534 | *to++ = *from; |
| 535 | tolen++; |
| 536 | } |
| 537 | from++; |
| 538 | } |
| 539 | else if (*from == delim) |
| 540 | break; |
| 541 | if (to < toend) |
| 542 | *to++ = *from; |
| 543 | } |
| 544 | if (to < toend) |
| 545 | *to = '\0'; |
| 546 | *retlen = tolen; |
| 547 | return (char *)from; |
| 548 | } |
| 549 | |
| 550 | /* return ptr to little string in big string, NULL if not found */ |
| 551 | /* This routine was donated by Corey Satten. */ |
| 552 | |
| 553 | char * |
| 554 | Perl_instr(const char *big, const char *little) |
| 555 | { |
| 556 | |
| 557 | PERL_ARGS_ASSERT_INSTR; |
| 558 | |
| 559 | return strstr((char*)big, (char*)little); |
| 560 | } |
| 561 | |
| 562 | /* same as instr but allow embedded nulls. The end pointers point to 1 beyond |
| 563 | * the final character desired to be checked */ |
| 564 | |
| 565 | char * |
| 566 | Perl_ninstr(const char *big, const char *bigend, const char *little, const char *lend) |
| 567 | { |
| 568 | PERL_ARGS_ASSERT_NINSTR; |
| 569 | if (little >= lend) |
| 570 | return (char*)big; |
| 571 | { |
| 572 | const char first = *little; |
| 573 | const char *s, *x; |
| 574 | bigend -= lend - little++; |
| 575 | OUTER: |
| 576 | while (big <= bigend) { |
| 577 | if (*big++ == first) { |
| 578 | for (x=big,s=little; s < lend; x++,s++) { |
| 579 | if (*s != *x) |
| 580 | goto OUTER; |
| 581 | } |
| 582 | return (char*)(big-1); |
| 583 | } |
| 584 | } |
| 585 | } |
| 586 | return NULL; |
| 587 | } |
| 588 | |
| 589 | /* reverse of the above--find last substring */ |
| 590 | |
| 591 | char * |
| 592 | Perl_rninstr(const char *big, const char *bigend, const char *little, const char *lend) |
| 593 | { |
| 594 | const char *bigbeg; |
| 595 | const I32 first = *little; |
| 596 | const char * const littleend = lend; |
| 597 | |
| 598 | PERL_ARGS_ASSERT_RNINSTR; |
| 599 | |
| 600 | if (little >= littleend) |
| 601 | return (char*)bigend; |
| 602 | bigbeg = big; |
| 603 | big = bigend - (littleend - little++); |
| 604 | while (big >= bigbeg) { |
| 605 | const char *s, *x; |
| 606 | if (*big-- != first) |
| 607 | continue; |
| 608 | for (x=big+2,s=little; s < littleend; /**/ ) { |
| 609 | if (*s != *x) |
| 610 | break; |
| 611 | else { |
| 612 | x++; |
| 613 | s++; |
| 614 | } |
| 615 | } |
| 616 | if (s >= littleend) |
| 617 | return (char*)(big+1); |
| 618 | } |
| 619 | return NULL; |
| 620 | } |
| 621 | |
| 622 | /* As a space optimization, we do not compile tables for strings of length |
| 623 | 0 and 1, and for strings of length 2 unless FBMcf_TAIL. These are |
| 624 | special-cased in fbm_instr(). |
| 625 | |
| 626 | If FBMcf_TAIL, the table is created as if the string has a trailing \n. */ |
| 627 | |
| 628 | /* |
| 629 | =head1 Miscellaneous Functions |
| 630 | |
| 631 | =for apidoc fbm_compile |
| 632 | |
| 633 | Analyses the string in order to make fast searches on it using fbm_instr() |
| 634 | -- the Boyer-Moore algorithm. |
| 635 | |
| 636 | =cut |
| 637 | */ |
| 638 | |
| 639 | void |
| 640 | Perl_fbm_compile(pTHX_ SV *sv, U32 flags) |
| 641 | { |
| 642 | const U8 *s; |
| 643 | STRLEN i; |
| 644 | STRLEN len; |
| 645 | U32 frequency = 256; |
| 646 | MAGIC *mg; |
| 647 | PERL_DEB( STRLEN rarest = 0 ); |
| 648 | |
| 649 | PERL_ARGS_ASSERT_FBM_COMPILE; |
| 650 | |
| 651 | if (isGV_with_GP(sv) || SvROK(sv)) |
| 652 | return; |
| 653 | |
| 654 | if (SvVALID(sv)) |
| 655 | return; |
| 656 | |
| 657 | if (flags & FBMcf_TAIL) { |
| 658 | MAGIC * const mg = SvUTF8(sv) && SvMAGICAL(sv) ? mg_find(sv, PERL_MAGIC_utf8) : NULL; |
| 659 | sv_catpvs(sv, "\n"); /* Taken into account in fbm_instr() */ |
| 660 | if (mg && mg->mg_len >= 0) |
| 661 | mg->mg_len++; |
| 662 | } |
| 663 | if (!SvPOK(sv) || SvNIOKp(sv)) |
| 664 | s = (U8*)SvPV_force_mutable(sv, len); |
| 665 | else s = (U8 *)SvPV_mutable(sv, len); |
| 666 | if (len == 0) /* TAIL might be on a zero-length string. */ |
| 667 | return; |
| 668 | SvUPGRADE(sv, SVt_PVMG); |
| 669 | SvIOK_off(sv); |
| 670 | SvNOK_off(sv); |
| 671 | SvVALID_on(sv); |
| 672 | |
| 673 | /* "deep magic", the comment used to add. The use of MAGIC itself isn't |
| 674 | really. MAGIC was originally added in 79072805bf63abe5 (perl 5.0 alpha 2) |
| 675 | to call SvVALID_off() if the scalar was assigned to. |
| 676 | |
| 677 | The comment itself (and "deeper magic" below) date back to |
| 678 | 378cc40b38293ffc (perl 2.0). "deep magic" was an annotation on |
| 679 | str->str_pok |= 2; |
| 680 | where the magic (presumably) was that the scalar had a BM table hidden |
| 681 | inside itself. |
| 682 | |
| 683 | As MAGIC is always present on BMs [in Perl 5 :-)], we can use it to store |
| 684 | the table instead of the previous (somewhat hacky) approach of co-opting |
| 685 | the string buffer and storing it after the string. */ |
| 686 | |
| 687 | assert(!mg_find(sv, PERL_MAGIC_bm)); |
| 688 | mg = sv_magicext(sv, NULL, PERL_MAGIC_bm, &PL_vtbl_bm, NULL, 0); |
| 689 | assert(mg); |
| 690 | |
| 691 | if (len > 2) { |
| 692 | /* Shorter strings are special-cased in Perl_fbm_instr(), and don't use |
| 693 | the BM table. */ |
| 694 | const U8 mlen = (len>255) ? 255 : (U8)len; |
| 695 | const unsigned char *const sb = s + len - mlen; /* first char (maybe) */ |
| 696 | U8 *table; |
| 697 | |
| 698 | Newx(table, 256, U8); |
| 699 | memset((void*)table, mlen, 256); |
| 700 | mg->mg_ptr = (char *)table; |
| 701 | mg->mg_len = 256; |
| 702 | |
| 703 | s += len - 1; /* last char */ |
| 704 | i = 0; |
| 705 | while (s >= sb) { |
| 706 | if (table[*s] == mlen) |
| 707 | table[*s] = (U8)i; |
| 708 | s--, i++; |
| 709 | } |
| 710 | } |
| 711 | |
| 712 | s = (const unsigned char*)(SvPVX_const(sv)); /* deeper magic */ |
| 713 | for (i = 0; i < len; i++) { |
| 714 | if (PL_freq[s[i]] < frequency) { |
| 715 | PERL_DEB( rarest = i ); |
| 716 | frequency = PL_freq[s[i]]; |
| 717 | } |
| 718 | } |
| 719 | BmUSEFUL(sv) = 100; /* Initial value */ |
| 720 | if (flags & FBMcf_TAIL) |
| 721 | SvTAIL_on(sv); |
| 722 | DEBUG_r(PerlIO_printf(Perl_debug_log, "rarest char %c at %"UVuf"\n", |
| 723 | s[rarest], (UV)rarest)); |
| 724 | } |
| 725 | |
| 726 | /* If SvTAIL(littlestr), it has a fake '\n' at end. */ |
| 727 | /* If SvTAIL is actually due to \Z or \z, this gives false positives |
| 728 | if multiline */ |
| 729 | |
| 730 | /* |
| 731 | =for apidoc fbm_instr |
| 732 | |
| 733 | Returns the location of the SV in the string delimited by C<big> and |
| 734 | C<bigend>. It returns C<NULL> if the string can't be found. The C<sv> |
| 735 | does not have to be fbm_compiled, but the search will not be as fast |
| 736 | then. |
| 737 | |
| 738 | =cut |
| 739 | */ |
| 740 | |
| 741 | char * |
| 742 | Perl_fbm_instr(pTHX_ unsigned char *big, unsigned char *bigend, SV *littlestr, U32 flags) |
| 743 | { |
| 744 | unsigned char *s; |
| 745 | STRLEN l; |
| 746 | const unsigned char *little = (const unsigned char *)SvPV_const(littlestr,l); |
| 747 | STRLEN littlelen = l; |
| 748 | const I32 multiline = flags & FBMrf_MULTILINE; |
| 749 | |
| 750 | PERL_ARGS_ASSERT_FBM_INSTR; |
| 751 | |
| 752 | if ((STRLEN)(bigend - big) < littlelen) { |
| 753 | if ( SvTAIL(littlestr) |
| 754 | && ((STRLEN)(bigend - big) == littlelen - 1) |
| 755 | && (littlelen == 1 |
| 756 | || (*big == *little && |
| 757 | memEQ((char *)big, (char *)little, littlelen - 1)))) |
| 758 | return (char*)big; |
| 759 | return NULL; |
| 760 | } |
| 761 | |
| 762 | switch (littlelen) { /* Special cases for 0, 1 and 2 */ |
| 763 | case 0: |
| 764 | return (char*)big; /* Cannot be SvTAIL! */ |
| 765 | case 1: |
| 766 | if (SvTAIL(littlestr) && !multiline) { /* Anchor only! */ |
| 767 | /* Know that bigend != big. */ |
| 768 | if (bigend[-1] == '\n') |
| 769 | return (char *)(bigend - 1); |
| 770 | return (char *) bigend; |
| 771 | } |
| 772 | s = big; |
| 773 | while (s < bigend) { |
| 774 | if (*s == *little) |
| 775 | return (char *)s; |
| 776 | s++; |
| 777 | } |
| 778 | if (SvTAIL(littlestr)) |
| 779 | return (char *) bigend; |
| 780 | return NULL; |
| 781 | case 2: |
| 782 | if (SvTAIL(littlestr) && !multiline) { |
| 783 | if (bigend[-1] == '\n' && bigend[-2] == *little) |
| 784 | return (char*)bigend - 2; |
| 785 | if (bigend[-1] == *little) |
| 786 | return (char*)bigend - 1; |
| 787 | return NULL; |
| 788 | } |
| 789 | { |
| 790 | /* This should be better than FBM if c1 == c2, and almost |
| 791 | as good otherwise: maybe better since we do less indirection. |
| 792 | And we save a lot of memory by caching no table. */ |
| 793 | const unsigned char c1 = little[0]; |
| 794 | const unsigned char c2 = little[1]; |
| 795 | |
| 796 | s = big + 1; |
| 797 | bigend--; |
| 798 | if (c1 != c2) { |
| 799 | while (s <= bigend) { |
| 800 | if (s[0] == c2) { |
| 801 | if (s[-1] == c1) |
| 802 | return (char*)s - 1; |
| 803 | s += 2; |
| 804 | continue; |
| 805 | } |
| 806 | next_chars: |
| 807 | if (s[0] == c1) { |
| 808 | if (s == bigend) |
| 809 | goto check_1char_anchor; |
| 810 | if (s[1] == c2) |
| 811 | return (char*)s; |
| 812 | else { |
| 813 | s++; |
| 814 | goto next_chars; |
| 815 | } |
| 816 | } |
| 817 | else |
| 818 | s += 2; |
| 819 | } |
| 820 | goto check_1char_anchor; |
| 821 | } |
| 822 | /* Now c1 == c2 */ |
| 823 | while (s <= bigend) { |
| 824 | if (s[0] == c1) { |
| 825 | if (s[-1] == c1) |
| 826 | return (char*)s - 1; |
| 827 | if (s == bigend) |
| 828 | goto check_1char_anchor; |
| 829 | if (s[1] == c1) |
| 830 | return (char*)s; |
| 831 | s += 3; |
| 832 | } |
| 833 | else |
| 834 | s += 2; |
| 835 | } |
| 836 | } |
| 837 | check_1char_anchor: /* One char and anchor! */ |
| 838 | if (SvTAIL(littlestr) && (*bigend == *little)) |
| 839 | return (char *)bigend; /* bigend is already decremented. */ |
| 840 | return NULL; |
| 841 | default: |
| 842 | break; /* Only lengths 0 1 and 2 have special-case code. */ |
| 843 | } |
| 844 | |
| 845 | if (SvTAIL(littlestr) && !multiline) { /* tail anchored? */ |
| 846 | s = bigend - littlelen; |
| 847 | if (s >= big && bigend[-1] == '\n' && *s == *little |
| 848 | /* Automatically of length > 2 */ |
| 849 | && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2)) |
| 850 | { |
| 851 | return (char*)s; /* how sweet it is */ |
| 852 | } |
| 853 | if (s[1] == *little |
| 854 | && memEQ((char*)s + 2, (char*)little + 1, littlelen - 2)) |
| 855 | { |
| 856 | return (char*)s + 1; /* how sweet it is */ |
| 857 | } |
| 858 | return NULL; |
| 859 | } |
| 860 | if (!SvVALID(littlestr)) { |
| 861 | char * const b = ninstr((char*)big,(char*)bigend, |
| 862 | (char*)little, (char*)little + littlelen); |
| 863 | |
| 864 | if (!b && SvTAIL(littlestr)) { /* Automatically multiline! */ |
| 865 | /* Chop \n from littlestr: */ |
| 866 | s = bigend - littlelen + 1; |
| 867 | if (*s == *little |
| 868 | && memEQ((char*)s + 1, (char*)little + 1, littlelen - 2)) |
| 869 | { |
| 870 | return (char*)s; |
| 871 | } |
| 872 | return NULL; |
| 873 | } |
| 874 | return b; |
| 875 | } |
| 876 | |
| 877 | /* Do actual FBM. */ |
| 878 | if (littlelen > (STRLEN)(bigend - big)) |
| 879 | return NULL; |
| 880 | |
| 881 | { |
| 882 | const MAGIC *const mg = mg_find(littlestr, PERL_MAGIC_bm); |
| 883 | const unsigned char *oldlittle; |
| 884 | |
| 885 | assert(mg); |
| 886 | |
| 887 | --littlelen; /* Last char found by table lookup */ |
| 888 | |
| 889 | s = big + littlelen; |
| 890 | little += littlelen; /* last char */ |
| 891 | oldlittle = little; |
| 892 | if (s < bigend) { |
| 893 | const unsigned char * const table = (const unsigned char *) mg->mg_ptr; |
| 894 | I32 tmp; |
| 895 | |
| 896 | top2: |
| 897 | if ((tmp = table[*s])) { |
| 898 | if ((s += tmp) < bigend) |
| 899 | goto top2; |
| 900 | goto check_end; |
| 901 | } |
| 902 | else { /* less expensive than calling strncmp() */ |
| 903 | unsigned char * const olds = s; |
| 904 | |
| 905 | tmp = littlelen; |
| 906 | |
| 907 | while (tmp--) { |
| 908 | if (*--s == *--little) |
| 909 | continue; |
| 910 | s = olds + 1; /* here we pay the price for failure */ |
| 911 | little = oldlittle; |
| 912 | if (s < bigend) /* fake up continue to outer loop */ |
| 913 | goto top2; |
| 914 | goto check_end; |
| 915 | } |
| 916 | return (char *)s; |
| 917 | } |
| 918 | } |
| 919 | check_end: |
| 920 | if ( s == bigend |
| 921 | && SvTAIL(littlestr) |
| 922 | && memEQ((char *)(bigend - littlelen), |
| 923 | (char *)(oldlittle - littlelen), littlelen) ) |
| 924 | return (char*)bigend - littlelen; |
| 925 | return NULL; |
| 926 | } |
| 927 | } |
| 928 | |
| 929 | /* |
| 930 | =for apidoc foldEQ |
| 931 | |
| 932 | Returns true if the leading len bytes of the strings s1 and s2 are the same |
| 933 | case-insensitively; false otherwise. Uppercase and lowercase ASCII range bytes |
| 934 | match themselves and their opposite case counterparts. Non-cased and non-ASCII |
| 935 | range bytes match only themselves. |
| 936 | |
| 937 | =cut |
| 938 | */ |
| 939 | |
| 940 | |
| 941 | I32 |
| 942 | Perl_foldEQ(const char *s1, const char *s2, I32 len) |
| 943 | { |
| 944 | const U8 *a = (const U8 *)s1; |
| 945 | const U8 *b = (const U8 *)s2; |
| 946 | |
| 947 | PERL_ARGS_ASSERT_FOLDEQ; |
| 948 | |
| 949 | assert(len >= 0); |
| 950 | |
| 951 | while (len--) { |
| 952 | if (*a != *b && *a != PL_fold[*b]) |
| 953 | return 0; |
| 954 | a++,b++; |
| 955 | } |
| 956 | return 1; |
| 957 | } |
| 958 | I32 |
| 959 | Perl_foldEQ_latin1(const char *s1, const char *s2, I32 len) |
| 960 | { |
| 961 | /* Compare non-utf8 using Unicode (Latin1) semantics. Does not work on |
| 962 | * MICRO_SIGN, LATIN_SMALL_LETTER_SHARP_S, nor |
| 963 | * LATIN_SMALL_LETTER_Y_WITH_DIAERESIS, and does not check for these. Nor |
| 964 | * does it check that the strings each have at least 'len' characters */ |
| 965 | |
| 966 | const U8 *a = (const U8 *)s1; |
| 967 | const U8 *b = (const U8 *)s2; |
| 968 | |
| 969 | PERL_ARGS_ASSERT_FOLDEQ_LATIN1; |
| 970 | |
| 971 | assert(len >= 0); |
| 972 | |
| 973 | while (len--) { |
| 974 | if (*a != *b && *a != PL_fold_latin1[*b]) { |
| 975 | return 0; |
| 976 | } |
| 977 | a++, b++; |
| 978 | } |
| 979 | return 1; |
| 980 | } |
| 981 | |
| 982 | /* |
| 983 | =for apidoc foldEQ_locale |
| 984 | |
| 985 | Returns true if the leading len bytes of the strings s1 and s2 are the same |
| 986 | case-insensitively in the current locale; false otherwise. |
| 987 | |
| 988 | =cut |
| 989 | */ |
| 990 | |
| 991 | I32 |
| 992 | Perl_foldEQ_locale(const char *s1, const char *s2, I32 len) |
| 993 | { |
| 994 | dVAR; |
| 995 | const U8 *a = (const U8 *)s1; |
| 996 | const U8 *b = (const U8 *)s2; |
| 997 | |
| 998 | PERL_ARGS_ASSERT_FOLDEQ_LOCALE; |
| 999 | |
| 1000 | assert(len >= 0); |
| 1001 | |
| 1002 | while (len--) { |
| 1003 | if (*a != *b && *a != PL_fold_locale[*b]) |
| 1004 | return 0; |
| 1005 | a++,b++; |
| 1006 | } |
| 1007 | return 1; |
| 1008 | } |
| 1009 | |
| 1010 | /* copy a string to a safe spot */ |
| 1011 | |
| 1012 | /* |
| 1013 | =head1 Memory Management |
| 1014 | |
| 1015 | =for apidoc savepv |
| 1016 | |
| 1017 | Perl's version of C<strdup()>. Returns a pointer to a newly allocated |
| 1018 | string which is a duplicate of C<pv>. The size of the string is |
| 1019 | determined by C<strlen()>, which means it may not contain embedded C<NUL> |
| 1020 | characters and must have a trailing C<NUL>. The memory allocated for the new |
| 1021 | string can be freed with the C<Safefree()> function. |
| 1022 | |
| 1023 | On some platforms, Windows for example, all allocated memory owned by a thread |
| 1024 | is deallocated when that thread ends. So if you need that not to happen, you |
| 1025 | need to use the shared memory functions, such as C<L</savesharedpv>>. |
| 1026 | |
| 1027 | =cut |
| 1028 | */ |
| 1029 | |
| 1030 | char * |
| 1031 | Perl_savepv(pTHX_ const char *pv) |
| 1032 | { |
| 1033 | PERL_UNUSED_CONTEXT; |
| 1034 | if (!pv) |
| 1035 | return NULL; |
| 1036 | else { |
| 1037 | char *newaddr; |
| 1038 | const STRLEN pvlen = strlen(pv)+1; |
| 1039 | Newx(newaddr, pvlen, char); |
| 1040 | return (char*)memcpy(newaddr, pv, pvlen); |
| 1041 | } |
| 1042 | } |
| 1043 | |
| 1044 | /* same thing but with a known length */ |
| 1045 | |
| 1046 | /* |
| 1047 | =for apidoc savepvn |
| 1048 | |
| 1049 | Perl's version of what C<strndup()> would be if it existed. Returns a |
| 1050 | pointer to a newly allocated string which is a duplicate of the first |
| 1051 | C<len> bytes from C<pv>, plus a trailing |
| 1052 | C<NUL> byte. The memory allocated for |
| 1053 | the new string can be freed with the C<Safefree()> function. |
| 1054 | |
| 1055 | On some platforms, Windows for example, all allocated memory owned by a thread |
| 1056 | is deallocated when that thread ends. So if you need that not to happen, you |
| 1057 | need to use the shared memory functions, such as C<L</savesharedpvn>>. |
| 1058 | |
| 1059 | =cut |
| 1060 | */ |
| 1061 | |
| 1062 | char * |
| 1063 | Perl_savepvn(pTHX_ const char *pv, I32 len) |
| 1064 | { |
| 1065 | char *newaddr; |
| 1066 | PERL_UNUSED_CONTEXT; |
| 1067 | |
| 1068 | assert(len >= 0); |
| 1069 | |
| 1070 | Newx(newaddr,len+1,char); |
| 1071 | /* Give a meaning to NULL pointer mainly for the use in sv_magic() */ |
| 1072 | if (pv) { |
| 1073 | /* might not be null terminated */ |
| 1074 | newaddr[len] = '\0'; |
| 1075 | return (char *) CopyD(pv,newaddr,len,char); |
| 1076 | } |
| 1077 | else { |
| 1078 | return (char *) ZeroD(newaddr,len+1,char); |
| 1079 | } |
| 1080 | } |
| 1081 | |
| 1082 | /* |
| 1083 | =for apidoc savesharedpv |
| 1084 | |
| 1085 | A version of C<savepv()> which allocates the duplicate string in memory |
| 1086 | which is shared between threads. |
| 1087 | |
| 1088 | =cut |
| 1089 | */ |
| 1090 | char * |
| 1091 | Perl_savesharedpv(pTHX_ const char *pv) |
| 1092 | { |
| 1093 | char *newaddr; |
| 1094 | STRLEN pvlen; |
| 1095 | |
| 1096 | PERL_UNUSED_CONTEXT; |
| 1097 | |
| 1098 | if (!pv) |
| 1099 | return NULL; |
| 1100 | |
| 1101 | pvlen = strlen(pv)+1; |
| 1102 | newaddr = (char*)PerlMemShared_malloc(pvlen); |
| 1103 | if (!newaddr) { |
| 1104 | croak_no_mem(); |
| 1105 | } |
| 1106 | return (char*)memcpy(newaddr, pv, pvlen); |
| 1107 | } |
| 1108 | |
| 1109 | /* |
| 1110 | =for apidoc savesharedpvn |
| 1111 | |
| 1112 | A version of C<savepvn()> which allocates the duplicate string in memory |
| 1113 | which is shared between threads. (With the specific difference that a NULL |
| 1114 | pointer is not acceptable) |
| 1115 | |
| 1116 | =cut |
| 1117 | */ |
| 1118 | char * |
| 1119 | Perl_savesharedpvn(pTHX_ const char *const pv, const STRLEN len) |
| 1120 | { |
| 1121 | char *const newaddr = (char*)PerlMemShared_malloc(len + 1); |
| 1122 | |
| 1123 | PERL_UNUSED_CONTEXT; |
| 1124 | /* PERL_ARGS_ASSERT_SAVESHAREDPVN; */ |
| 1125 | |
| 1126 | if (!newaddr) { |
| 1127 | croak_no_mem(); |
| 1128 | } |
| 1129 | newaddr[len] = '\0'; |
| 1130 | return (char*)memcpy(newaddr, pv, len); |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | =for apidoc savesvpv |
| 1135 | |
| 1136 | A version of C<savepv()>/C<savepvn()> which gets the string to duplicate from |
| 1137 | the passed in SV using C<SvPV()> |
| 1138 | |
| 1139 | On some platforms, Windows for example, all allocated memory owned by a thread |
| 1140 | is deallocated when that thread ends. So if you need that not to happen, you |
| 1141 | need to use the shared memory functions, such as C<L</savesharedsvpv>>. |
| 1142 | |
| 1143 | =cut |
| 1144 | */ |
| 1145 | |
| 1146 | char * |
| 1147 | Perl_savesvpv(pTHX_ SV *sv) |
| 1148 | { |
| 1149 | STRLEN len; |
| 1150 | const char * const pv = SvPV_const(sv, len); |
| 1151 | char *newaddr; |
| 1152 | |
| 1153 | PERL_ARGS_ASSERT_SAVESVPV; |
| 1154 | |
| 1155 | ++len; |
| 1156 | Newx(newaddr,len,char); |
| 1157 | return (char *) CopyD(pv,newaddr,len,char); |
| 1158 | } |
| 1159 | |
| 1160 | /* |
| 1161 | =for apidoc savesharedsvpv |
| 1162 | |
| 1163 | A version of C<savesharedpv()> which allocates the duplicate string in |
| 1164 | memory which is shared between threads. |
| 1165 | |
| 1166 | =cut |
| 1167 | */ |
| 1168 | |
| 1169 | char * |
| 1170 | Perl_savesharedsvpv(pTHX_ SV *sv) |
| 1171 | { |
| 1172 | STRLEN len; |
| 1173 | const char * const pv = SvPV_const(sv, len); |
| 1174 | |
| 1175 | PERL_ARGS_ASSERT_SAVESHAREDSVPV; |
| 1176 | |
| 1177 | return savesharedpvn(pv, len); |
| 1178 | } |
| 1179 | |
| 1180 | /* the SV for Perl_form() and mess() is not kept in an arena */ |
| 1181 | |
| 1182 | STATIC SV * |
| 1183 | S_mess_alloc(pTHX) |
| 1184 | { |
| 1185 | SV *sv; |
| 1186 | XPVMG *any; |
| 1187 | |
| 1188 | if (PL_phase != PERL_PHASE_DESTRUCT) |
| 1189 | return newSVpvs_flags("", SVs_TEMP); |
| 1190 | |
| 1191 | if (PL_mess_sv) |
| 1192 | return PL_mess_sv; |
| 1193 | |
| 1194 | /* Create as PVMG now, to avoid any upgrading later */ |
| 1195 | Newx(sv, 1, SV); |
| 1196 | Newxz(any, 1, XPVMG); |
| 1197 | SvFLAGS(sv) = SVt_PVMG; |
| 1198 | SvANY(sv) = (void*)any; |
| 1199 | SvPV_set(sv, NULL); |
| 1200 | SvREFCNT(sv) = 1 << 30; /* practically infinite */ |
| 1201 | PL_mess_sv = sv; |
| 1202 | return sv; |
| 1203 | } |
| 1204 | |
| 1205 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1206 | char * |
| 1207 | Perl_form_nocontext(const char* pat, ...) |
| 1208 | { |
| 1209 | dTHX; |
| 1210 | char *retval; |
| 1211 | va_list args; |
| 1212 | PERL_ARGS_ASSERT_FORM_NOCONTEXT; |
| 1213 | va_start(args, pat); |
| 1214 | retval = vform(pat, &args); |
| 1215 | va_end(args); |
| 1216 | return retval; |
| 1217 | } |
| 1218 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1219 | |
| 1220 | /* |
| 1221 | =head1 Miscellaneous Functions |
| 1222 | =for apidoc form |
| 1223 | |
| 1224 | Takes a sprintf-style format pattern and conventional |
| 1225 | (non-SV) arguments and returns the formatted string. |
| 1226 | |
| 1227 | (char *) Perl_form(pTHX_ const char* pat, ...) |
| 1228 | |
| 1229 | can be used any place a string (char *) is required: |
| 1230 | |
| 1231 | char * s = Perl_form("%d.%d",major,minor); |
| 1232 | |
| 1233 | Uses a single private buffer so if you want to format several strings you |
| 1234 | must explicitly copy the earlier strings away (and free the copies when you |
| 1235 | are done). |
| 1236 | |
| 1237 | =cut |
| 1238 | */ |
| 1239 | |
| 1240 | char * |
| 1241 | Perl_form(pTHX_ const char* pat, ...) |
| 1242 | { |
| 1243 | char *retval; |
| 1244 | va_list args; |
| 1245 | PERL_ARGS_ASSERT_FORM; |
| 1246 | va_start(args, pat); |
| 1247 | retval = vform(pat, &args); |
| 1248 | va_end(args); |
| 1249 | return retval; |
| 1250 | } |
| 1251 | |
| 1252 | char * |
| 1253 | Perl_vform(pTHX_ const char *pat, va_list *args) |
| 1254 | { |
| 1255 | SV * const sv = mess_alloc(); |
| 1256 | PERL_ARGS_ASSERT_VFORM; |
| 1257 | sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL); |
| 1258 | return SvPVX(sv); |
| 1259 | } |
| 1260 | |
| 1261 | /* |
| 1262 | =for apidoc Am|SV *|mess|const char *pat|... |
| 1263 | |
| 1264 | Take a sprintf-style format pattern and argument list. These are used to |
| 1265 | generate a string message. If the message does not end with a newline, |
| 1266 | then it will be extended with some indication of the current location |
| 1267 | in the code, as described for L</mess_sv>. |
| 1268 | |
| 1269 | Normally, the resulting message is returned in a new mortal SV. |
| 1270 | During global destruction a single SV may be shared between uses of |
| 1271 | this function. |
| 1272 | |
| 1273 | =cut |
| 1274 | */ |
| 1275 | |
| 1276 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1277 | SV * |
| 1278 | Perl_mess_nocontext(const char *pat, ...) |
| 1279 | { |
| 1280 | dTHX; |
| 1281 | SV *retval; |
| 1282 | va_list args; |
| 1283 | PERL_ARGS_ASSERT_MESS_NOCONTEXT; |
| 1284 | va_start(args, pat); |
| 1285 | retval = vmess(pat, &args); |
| 1286 | va_end(args); |
| 1287 | return retval; |
| 1288 | } |
| 1289 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1290 | |
| 1291 | SV * |
| 1292 | Perl_mess(pTHX_ const char *pat, ...) |
| 1293 | { |
| 1294 | SV *retval; |
| 1295 | va_list args; |
| 1296 | PERL_ARGS_ASSERT_MESS; |
| 1297 | va_start(args, pat); |
| 1298 | retval = vmess(pat, &args); |
| 1299 | va_end(args); |
| 1300 | return retval; |
| 1301 | } |
| 1302 | |
| 1303 | const COP* |
| 1304 | Perl_closest_cop(pTHX_ const COP *cop, const OP *o, const OP *curop, |
| 1305 | bool opnext) |
| 1306 | { |
| 1307 | /* Look for curop starting from o. cop is the last COP we've seen. */ |
| 1308 | /* opnext means that curop is actually the ->op_next of the op we are |
| 1309 | seeking. */ |
| 1310 | |
| 1311 | PERL_ARGS_ASSERT_CLOSEST_COP; |
| 1312 | |
| 1313 | if (!o || !curop || ( |
| 1314 | opnext ? o->op_next == curop && o->op_type != OP_SCOPE : o == curop |
| 1315 | )) |
| 1316 | return cop; |
| 1317 | |
| 1318 | if (o->op_flags & OPf_KIDS) { |
| 1319 | const OP *kid; |
| 1320 | for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) { |
| 1321 | const COP *new_cop; |
| 1322 | |
| 1323 | /* If the OP_NEXTSTATE has been optimised away we can still use it |
| 1324 | * the get the file and line number. */ |
| 1325 | |
| 1326 | if (kid->op_type == OP_NULL && kid->op_targ == OP_NEXTSTATE) |
| 1327 | cop = (const COP *)kid; |
| 1328 | |
| 1329 | /* Keep searching, and return when we've found something. */ |
| 1330 | |
| 1331 | new_cop = closest_cop(cop, kid, curop, opnext); |
| 1332 | if (new_cop) |
| 1333 | return new_cop; |
| 1334 | } |
| 1335 | } |
| 1336 | |
| 1337 | /* Nothing found. */ |
| 1338 | |
| 1339 | return NULL; |
| 1340 | } |
| 1341 | |
| 1342 | /* |
| 1343 | =for apidoc Am|SV *|mess_sv|SV *basemsg|bool consume |
| 1344 | |
| 1345 | Expands a message, intended for the user, to include an indication of |
| 1346 | the current location in the code, if the message does not already appear |
| 1347 | to be complete. |
| 1348 | |
| 1349 | C<basemsg> is the initial message or object. If it is a reference, it |
| 1350 | will be used as-is and will be the result of this function. Otherwise it |
| 1351 | is used as a string, and if it already ends with a newline, it is taken |
| 1352 | to be complete, and the result of this function will be the same string. |
| 1353 | If the message does not end with a newline, then a segment such as C<at |
| 1354 | foo.pl line 37> will be appended, and possibly other clauses indicating |
| 1355 | the current state of execution. The resulting message will end with a |
| 1356 | dot and a newline. |
| 1357 | |
| 1358 | Normally, the resulting message is returned in a new mortal SV. |
| 1359 | During global destruction a single SV may be shared between uses of this |
| 1360 | function. If C<consume> is true, then the function is permitted (but not |
| 1361 | required) to modify and return C<basemsg> instead of allocating a new SV. |
| 1362 | |
| 1363 | =cut |
| 1364 | */ |
| 1365 | |
| 1366 | SV * |
| 1367 | Perl_mess_sv(pTHX_ SV *basemsg, bool consume) |
| 1368 | { |
| 1369 | SV *sv; |
| 1370 | |
| 1371 | #if defined(USE_C_BACKTRACE) && defined(USE_C_BACKTRACE_ON_ERROR) |
| 1372 | { |
| 1373 | char *ws; |
| 1374 | UV wi; |
| 1375 | /* The PERL_C_BACKTRACE_ON_WARN must be an integer of one or more. */ |
| 1376 | if ((ws = PerlEnv_getenv("PERL_C_BACKTRACE_ON_ERROR")) |
| 1377 | && grok_atoUV(ws, &wi, NULL) |
| 1378 | && wi <= PERL_INT_MAX |
| 1379 | ) { |
| 1380 | Perl_dump_c_backtrace(aTHX_ Perl_debug_log, (int)wi, 1); |
| 1381 | } |
| 1382 | } |
| 1383 | #endif |
| 1384 | |
| 1385 | PERL_ARGS_ASSERT_MESS_SV; |
| 1386 | |
| 1387 | if (SvROK(basemsg)) { |
| 1388 | if (consume) { |
| 1389 | sv = basemsg; |
| 1390 | } |
| 1391 | else { |
| 1392 | sv = mess_alloc(); |
| 1393 | sv_setsv(sv, basemsg); |
| 1394 | } |
| 1395 | return sv; |
| 1396 | } |
| 1397 | |
| 1398 | if (SvPOK(basemsg) && consume) { |
| 1399 | sv = basemsg; |
| 1400 | } |
| 1401 | else { |
| 1402 | sv = mess_alloc(); |
| 1403 | sv_copypv(sv, basemsg); |
| 1404 | } |
| 1405 | |
| 1406 | if (!SvCUR(sv) || *(SvEND(sv) - 1) != '\n') { |
| 1407 | /* |
| 1408 | * Try and find the file and line for PL_op. This will usually be |
| 1409 | * PL_curcop, but it might be a cop that has been optimised away. We |
| 1410 | * can try to find such a cop by searching through the optree starting |
| 1411 | * from the sibling of PL_curcop. |
| 1412 | */ |
| 1413 | |
| 1414 | const COP *cop = |
| 1415 | closest_cop(PL_curcop, OpSIBLING(PL_curcop), PL_op, FALSE); |
| 1416 | if (!cop) |
| 1417 | cop = PL_curcop; |
| 1418 | |
| 1419 | if (CopLINE(cop)) |
| 1420 | Perl_sv_catpvf(aTHX_ sv, " at %s line %"IVdf, |
| 1421 | OutCopFILE(cop), (IV)CopLINE(cop)); |
| 1422 | /* Seems that GvIO() can be untrustworthy during global destruction. */ |
| 1423 | if (GvIO(PL_last_in_gv) && (SvTYPE(GvIOp(PL_last_in_gv)) == SVt_PVIO) |
| 1424 | && IoLINES(GvIOp(PL_last_in_gv))) |
| 1425 | { |
| 1426 | STRLEN l; |
| 1427 | const bool line_mode = (RsSIMPLE(PL_rs) && |
| 1428 | *SvPV_const(PL_rs,l) == '\n' && l == 1); |
| 1429 | Perl_sv_catpvf(aTHX_ sv, ", <%"SVf"> %s %"IVdf, |
| 1430 | SVfARG(PL_last_in_gv == PL_argvgv |
| 1431 | ? &PL_sv_no |
| 1432 | : sv_2mortal(newSVhek(GvNAME_HEK(PL_last_in_gv)))), |
| 1433 | line_mode ? "line" : "chunk", |
| 1434 | (IV)IoLINES(GvIOp(PL_last_in_gv))); |
| 1435 | } |
| 1436 | if (PL_phase == PERL_PHASE_DESTRUCT) |
| 1437 | sv_catpvs(sv, " during global destruction"); |
| 1438 | sv_catpvs(sv, ".\n"); |
| 1439 | } |
| 1440 | return sv; |
| 1441 | } |
| 1442 | |
| 1443 | /* |
| 1444 | =for apidoc Am|SV *|vmess|const char *pat|va_list *args |
| 1445 | |
| 1446 | C<pat> and C<args> are a sprintf-style format pattern and encapsulated |
| 1447 | argument list. These are used to generate a string message. If the |
| 1448 | message does not end with a newline, then it will be extended with |
| 1449 | some indication of the current location in the code, as described for |
| 1450 | L</mess_sv>. |
| 1451 | |
| 1452 | Normally, the resulting message is returned in a new mortal SV. |
| 1453 | During global destruction a single SV may be shared between uses of |
| 1454 | this function. |
| 1455 | |
| 1456 | =cut |
| 1457 | */ |
| 1458 | |
| 1459 | SV * |
| 1460 | Perl_vmess(pTHX_ const char *pat, va_list *args) |
| 1461 | { |
| 1462 | SV * const sv = mess_alloc(); |
| 1463 | |
| 1464 | PERL_ARGS_ASSERT_VMESS; |
| 1465 | |
| 1466 | sv_vsetpvfn(sv, pat, strlen(pat), args, NULL, 0, NULL); |
| 1467 | return mess_sv(sv, 1); |
| 1468 | } |
| 1469 | |
| 1470 | void |
| 1471 | Perl_write_to_stderr(pTHX_ SV* msv) |
| 1472 | { |
| 1473 | IO *io; |
| 1474 | MAGIC *mg; |
| 1475 | |
| 1476 | PERL_ARGS_ASSERT_WRITE_TO_STDERR; |
| 1477 | |
| 1478 | if (PL_stderrgv && SvREFCNT(PL_stderrgv) |
| 1479 | && (io = GvIO(PL_stderrgv)) |
| 1480 | && (mg = SvTIED_mg((const SV *)io, PERL_MAGIC_tiedscalar))) |
| 1481 | Perl_magic_methcall(aTHX_ MUTABLE_SV(io), mg, SV_CONST(PRINT), |
| 1482 | G_SCALAR | G_DISCARD | G_WRITING_TO_STDERR, 1, msv); |
| 1483 | else { |
| 1484 | PerlIO * const serr = Perl_error_log; |
| 1485 | |
| 1486 | do_print(msv, serr); |
| 1487 | (void)PerlIO_flush(serr); |
| 1488 | } |
| 1489 | } |
| 1490 | |
| 1491 | /* |
| 1492 | =head1 Warning and Dieing |
| 1493 | */ |
| 1494 | |
| 1495 | /* Common code used in dieing and warning */ |
| 1496 | |
| 1497 | STATIC SV * |
| 1498 | S_with_queued_errors(pTHX_ SV *ex) |
| 1499 | { |
| 1500 | PERL_ARGS_ASSERT_WITH_QUEUED_ERRORS; |
| 1501 | if (PL_errors && SvCUR(PL_errors) && !SvROK(ex)) { |
| 1502 | sv_catsv(PL_errors, ex); |
| 1503 | ex = sv_mortalcopy(PL_errors); |
| 1504 | SvCUR_set(PL_errors, 0); |
| 1505 | } |
| 1506 | return ex; |
| 1507 | } |
| 1508 | |
| 1509 | STATIC bool |
| 1510 | S_invoke_exception_hook(pTHX_ SV *ex, bool warn) |
| 1511 | { |
| 1512 | HV *stash; |
| 1513 | GV *gv; |
| 1514 | CV *cv; |
| 1515 | SV **const hook = warn ? &PL_warnhook : &PL_diehook; |
| 1516 | /* sv_2cv might call Perl_croak() or Perl_warner() */ |
| 1517 | SV * const oldhook = *hook; |
| 1518 | |
| 1519 | if (!oldhook) |
| 1520 | return FALSE; |
| 1521 | |
| 1522 | ENTER; |
| 1523 | SAVESPTR(*hook); |
| 1524 | *hook = NULL; |
| 1525 | cv = sv_2cv(oldhook, &stash, &gv, 0); |
| 1526 | LEAVE; |
| 1527 | if (cv && !CvDEPTH(cv) && (CvROOT(cv) || CvXSUB(cv))) { |
| 1528 | dSP; |
| 1529 | SV *exarg; |
| 1530 | |
| 1531 | ENTER; |
| 1532 | save_re_context(); |
| 1533 | if (warn) { |
| 1534 | SAVESPTR(*hook); |
| 1535 | *hook = NULL; |
| 1536 | } |
| 1537 | exarg = newSVsv(ex); |
| 1538 | SvREADONLY_on(exarg); |
| 1539 | SAVEFREESV(exarg); |
| 1540 | |
| 1541 | PUSHSTACKi(warn ? PERLSI_WARNHOOK : PERLSI_DIEHOOK); |
| 1542 | PUSHMARK(SP); |
| 1543 | XPUSHs(exarg); |
| 1544 | PUTBACK; |
| 1545 | call_sv(MUTABLE_SV(cv), G_DISCARD); |
| 1546 | POPSTACK; |
| 1547 | LEAVE; |
| 1548 | return TRUE; |
| 1549 | } |
| 1550 | return FALSE; |
| 1551 | } |
| 1552 | |
| 1553 | /* |
| 1554 | =for apidoc Am|OP *|die_sv|SV *baseex |
| 1555 | |
| 1556 | Behaves the same as L</croak_sv>, except for the return type. |
| 1557 | It should be used only where the C<OP *> return type is required. |
| 1558 | The function never actually returns. |
| 1559 | |
| 1560 | =cut |
| 1561 | */ |
| 1562 | |
| 1563 | #ifdef _MSC_VER |
| 1564 | # pragma warning( push ) |
| 1565 | # pragma warning( disable : 4646 ) /* warning C4646: function declared with |
| 1566 | __declspec(noreturn) has non-void return type */ |
| 1567 | # pragma warning( disable : 4645 ) /* warning C4645: function declared with |
| 1568 | __declspec(noreturn) has a return statement */ |
| 1569 | #endif |
| 1570 | OP * |
| 1571 | Perl_die_sv(pTHX_ SV *baseex) |
| 1572 | { |
| 1573 | PERL_ARGS_ASSERT_DIE_SV; |
| 1574 | croak_sv(baseex); |
| 1575 | /* NOTREACHED */ |
| 1576 | NORETURN_FUNCTION_END; |
| 1577 | } |
| 1578 | #ifdef _MSC_VER |
| 1579 | # pragma warning( pop ) |
| 1580 | #endif |
| 1581 | |
| 1582 | /* |
| 1583 | =for apidoc Am|OP *|die|const char *pat|... |
| 1584 | |
| 1585 | Behaves the same as L</croak>, except for the return type. |
| 1586 | It should be used only where the C<OP *> return type is required. |
| 1587 | The function never actually returns. |
| 1588 | |
| 1589 | =cut |
| 1590 | */ |
| 1591 | |
| 1592 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1593 | #ifdef _MSC_VER |
| 1594 | # pragma warning( push ) |
| 1595 | # pragma warning( disable : 4646 ) /* warning C4646: function declared with |
| 1596 | __declspec(noreturn) has non-void return type */ |
| 1597 | # pragma warning( disable : 4645 ) /* warning C4645: function declared with |
| 1598 | __declspec(noreturn) has a return statement */ |
| 1599 | #endif |
| 1600 | OP * |
| 1601 | Perl_die_nocontext(const char* pat, ...) |
| 1602 | { |
| 1603 | dTHX; |
| 1604 | va_list args; |
| 1605 | va_start(args, pat); |
| 1606 | vcroak(pat, &args); |
| 1607 | NOT_REACHED; /* NOTREACHED */ |
| 1608 | va_end(args); |
| 1609 | NORETURN_FUNCTION_END; |
| 1610 | } |
| 1611 | #ifdef _MSC_VER |
| 1612 | # pragma warning( pop ) |
| 1613 | #endif |
| 1614 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1615 | |
| 1616 | #ifdef _MSC_VER |
| 1617 | # pragma warning( push ) |
| 1618 | # pragma warning( disable : 4646 ) /* warning C4646: function declared with |
| 1619 | __declspec(noreturn) has non-void return type */ |
| 1620 | # pragma warning( disable : 4645 ) /* warning C4645: function declared with |
| 1621 | __declspec(noreturn) has a return statement */ |
| 1622 | #endif |
| 1623 | OP * |
| 1624 | Perl_die(pTHX_ const char* pat, ...) |
| 1625 | { |
| 1626 | va_list args; |
| 1627 | va_start(args, pat); |
| 1628 | vcroak(pat, &args); |
| 1629 | NOT_REACHED; /* NOTREACHED */ |
| 1630 | va_end(args); |
| 1631 | NORETURN_FUNCTION_END; |
| 1632 | } |
| 1633 | #ifdef _MSC_VER |
| 1634 | # pragma warning( pop ) |
| 1635 | #endif |
| 1636 | |
| 1637 | /* |
| 1638 | =for apidoc Am|void|croak_sv|SV *baseex |
| 1639 | |
| 1640 | This is an XS interface to Perl's C<die> function. |
| 1641 | |
| 1642 | C<baseex> is the error message or object. If it is a reference, it |
| 1643 | will be used as-is. Otherwise it is used as a string, and if it does |
| 1644 | not end with a newline then it will be extended with some indication of |
| 1645 | the current location in the code, as described for L</mess_sv>. |
| 1646 | |
| 1647 | The error message or object will be used as an exception, by default |
| 1648 | returning control to the nearest enclosing C<eval>, but subject to |
| 1649 | modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak_sv> |
| 1650 | function never returns normally. |
| 1651 | |
| 1652 | To die with a simple string message, the L</croak> function may be |
| 1653 | more convenient. |
| 1654 | |
| 1655 | =cut |
| 1656 | */ |
| 1657 | |
| 1658 | void |
| 1659 | Perl_croak_sv(pTHX_ SV *baseex) |
| 1660 | { |
| 1661 | SV *ex = with_queued_errors(mess_sv(baseex, 0)); |
| 1662 | PERL_ARGS_ASSERT_CROAK_SV; |
| 1663 | invoke_exception_hook(ex, FALSE); |
| 1664 | die_unwind(ex); |
| 1665 | } |
| 1666 | |
| 1667 | /* |
| 1668 | =for apidoc Am|void|vcroak|const char *pat|va_list *args |
| 1669 | |
| 1670 | This is an XS interface to Perl's C<die> function. |
| 1671 | |
| 1672 | C<pat> and C<args> are a sprintf-style format pattern and encapsulated |
| 1673 | argument list. These are used to generate a string message. If the |
| 1674 | message does not end with a newline, then it will be extended with |
| 1675 | some indication of the current location in the code, as described for |
| 1676 | L</mess_sv>. |
| 1677 | |
| 1678 | The error message will be used as an exception, by default |
| 1679 | returning control to the nearest enclosing C<eval>, but subject to |
| 1680 | modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak> |
| 1681 | function never returns normally. |
| 1682 | |
| 1683 | For historical reasons, if C<pat> is null then the contents of C<ERRSV> |
| 1684 | (C<$@>) will be used as an error message or object instead of building an |
| 1685 | error message from arguments. If you want to throw a non-string object, |
| 1686 | or build an error message in an SV yourself, it is preferable to use |
| 1687 | the L</croak_sv> function, which does not involve clobbering C<ERRSV>. |
| 1688 | |
| 1689 | =cut |
| 1690 | */ |
| 1691 | |
| 1692 | void |
| 1693 | Perl_vcroak(pTHX_ const char* pat, va_list *args) |
| 1694 | { |
| 1695 | SV *ex = with_queued_errors(pat ? vmess(pat, args) : mess_sv(ERRSV, 0)); |
| 1696 | invoke_exception_hook(ex, FALSE); |
| 1697 | die_unwind(ex); |
| 1698 | } |
| 1699 | |
| 1700 | /* |
| 1701 | =for apidoc Am|void|croak|const char *pat|... |
| 1702 | |
| 1703 | This is an XS interface to Perl's C<die> function. |
| 1704 | |
| 1705 | Take a sprintf-style format pattern and argument list. These are used to |
| 1706 | generate a string message. If the message does not end with a newline, |
| 1707 | then it will be extended with some indication of the current location |
| 1708 | in the code, as described for L</mess_sv>. |
| 1709 | |
| 1710 | The error message will be used as an exception, by default |
| 1711 | returning control to the nearest enclosing C<eval>, but subject to |
| 1712 | modification by a C<$SIG{__DIE__}> handler. In any case, the C<croak> |
| 1713 | function never returns normally. |
| 1714 | |
| 1715 | For historical reasons, if C<pat> is null then the contents of C<ERRSV> |
| 1716 | (C<$@>) will be used as an error message or object instead of building an |
| 1717 | error message from arguments. If you want to throw a non-string object, |
| 1718 | or build an error message in an SV yourself, it is preferable to use |
| 1719 | the L</croak_sv> function, which does not involve clobbering C<ERRSV>. |
| 1720 | |
| 1721 | =cut |
| 1722 | */ |
| 1723 | |
| 1724 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1725 | void |
| 1726 | Perl_croak_nocontext(const char *pat, ...) |
| 1727 | { |
| 1728 | dTHX; |
| 1729 | va_list args; |
| 1730 | va_start(args, pat); |
| 1731 | vcroak(pat, &args); |
| 1732 | NOT_REACHED; /* NOTREACHED */ |
| 1733 | va_end(args); |
| 1734 | } |
| 1735 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1736 | |
| 1737 | void |
| 1738 | Perl_croak(pTHX_ const char *pat, ...) |
| 1739 | { |
| 1740 | va_list args; |
| 1741 | va_start(args, pat); |
| 1742 | vcroak(pat, &args); |
| 1743 | NOT_REACHED; /* NOTREACHED */ |
| 1744 | va_end(args); |
| 1745 | } |
| 1746 | |
| 1747 | /* |
| 1748 | =for apidoc Am|void|croak_no_modify |
| 1749 | |
| 1750 | Exactly equivalent to C<Perl_croak(aTHX_ "%s", PL_no_modify)>, but generates |
| 1751 | terser object code than using C<Perl_croak>. Less code used on exception code |
| 1752 | paths reduces CPU cache pressure. |
| 1753 | |
| 1754 | =cut |
| 1755 | */ |
| 1756 | |
| 1757 | void |
| 1758 | Perl_croak_no_modify(void) |
| 1759 | { |
| 1760 | Perl_croak_nocontext( "%s", PL_no_modify); |
| 1761 | } |
| 1762 | |
| 1763 | /* does not return, used in util.c perlio.c and win32.c |
| 1764 | This is typically called when malloc returns NULL. |
| 1765 | */ |
| 1766 | void |
| 1767 | Perl_croak_no_mem(void) |
| 1768 | { |
| 1769 | dTHX; |
| 1770 | |
| 1771 | int fd = PerlIO_fileno(Perl_error_log); |
| 1772 | if (fd < 0) |
| 1773 | SETERRNO(EBADF,RMS_IFI); |
| 1774 | else { |
| 1775 | /* Can't use PerlIO to write as it allocates memory */ |
| 1776 | PERL_UNUSED_RESULT(PerlLIO_write(fd, PL_no_mem, sizeof(PL_no_mem)-1)); |
| 1777 | } |
| 1778 | my_exit(1); |
| 1779 | } |
| 1780 | |
| 1781 | /* does not return, used only in POPSTACK */ |
| 1782 | void |
| 1783 | Perl_croak_popstack(void) |
| 1784 | { |
| 1785 | dTHX; |
| 1786 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); |
| 1787 | my_exit(1); |
| 1788 | } |
| 1789 | |
| 1790 | /* |
| 1791 | =for apidoc Am|void|warn_sv|SV *baseex |
| 1792 | |
| 1793 | This is an XS interface to Perl's C<warn> function. |
| 1794 | |
| 1795 | C<baseex> is the error message or object. If it is a reference, it |
| 1796 | will be used as-is. Otherwise it is used as a string, and if it does |
| 1797 | not end with a newline then it will be extended with some indication of |
| 1798 | the current location in the code, as described for L</mess_sv>. |
| 1799 | |
| 1800 | The error message or object will by default be written to standard error, |
| 1801 | but this is subject to modification by a C<$SIG{__WARN__}> handler. |
| 1802 | |
| 1803 | To warn with a simple string message, the L</warn> function may be |
| 1804 | more convenient. |
| 1805 | |
| 1806 | =cut |
| 1807 | */ |
| 1808 | |
| 1809 | void |
| 1810 | Perl_warn_sv(pTHX_ SV *baseex) |
| 1811 | { |
| 1812 | SV *ex = mess_sv(baseex, 0); |
| 1813 | PERL_ARGS_ASSERT_WARN_SV; |
| 1814 | if (!invoke_exception_hook(ex, TRUE)) |
| 1815 | write_to_stderr(ex); |
| 1816 | } |
| 1817 | |
| 1818 | /* |
| 1819 | =for apidoc Am|void|vwarn|const char *pat|va_list *args |
| 1820 | |
| 1821 | This is an XS interface to Perl's C<warn> function. |
| 1822 | |
| 1823 | C<pat> and C<args> are a sprintf-style format pattern and encapsulated |
| 1824 | argument list. These are used to generate a string message. If the |
| 1825 | message does not end with a newline, then it will be extended with |
| 1826 | some indication of the current location in the code, as described for |
| 1827 | L</mess_sv>. |
| 1828 | |
| 1829 | The error message or object will by default be written to standard error, |
| 1830 | but this is subject to modification by a C<$SIG{__WARN__}> handler. |
| 1831 | |
| 1832 | Unlike with L</vcroak>, C<pat> is not permitted to be null. |
| 1833 | |
| 1834 | =cut |
| 1835 | */ |
| 1836 | |
| 1837 | void |
| 1838 | Perl_vwarn(pTHX_ const char* pat, va_list *args) |
| 1839 | { |
| 1840 | SV *ex = vmess(pat, args); |
| 1841 | PERL_ARGS_ASSERT_VWARN; |
| 1842 | if (!invoke_exception_hook(ex, TRUE)) |
| 1843 | write_to_stderr(ex); |
| 1844 | } |
| 1845 | |
| 1846 | /* |
| 1847 | =for apidoc Am|void|warn|const char *pat|... |
| 1848 | |
| 1849 | This is an XS interface to Perl's C<warn> function. |
| 1850 | |
| 1851 | Take a sprintf-style format pattern and argument list. These are used to |
| 1852 | generate a string message. If the message does not end with a newline, |
| 1853 | then it will be extended with some indication of the current location |
| 1854 | in the code, as described for L</mess_sv>. |
| 1855 | |
| 1856 | The error message or object will by default be written to standard error, |
| 1857 | but this is subject to modification by a C<$SIG{__WARN__}> handler. |
| 1858 | |
| 1859 | Unlike with L</croak>, C<pat> is not permitted to be null. |
| 1860 | |
| 1861 | =cut |
| 1862 | */ |
| 1863 | |
| 1864 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1865 | void |
| 1866 | Perl_warn_nocontext(const char *pat, ...) |
| 1867 | { |
| 1868 | dTHX; |
| 1869 | va_list args; |
| 1870 | PERL_ARGS_ASSERT_WARN_NOCONTEXT; |
| 1871 | va_start(args, pat); |
| 1872 | vwarn(pat, &args); |
| 1873 | va_end(args); |
| 1874 | } |
| 1875 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1876 | |
| 1877 | void |
| 1878 | Perl_warn(pTHX_ const char *pat, ...) |
| 1879 | { |
| 1880 | va_list args; |
| 1881 | PERL_ARGS_ASSERT_WARN; |
| 1882 | va_start(args, pat); |
| 1883 | vwarn(pat, &args); |
| 1884 | va_end(args); |
| 1885 | } |
| 1886 | |
| 1887 | #if defined(PERL_IMPLICIT_CONTEXT) |
| 1888 | void |
| 1889 | Perl_warner_nocontext(U32 err, const char *pat, ...) |
| 1890 | { |
| 1891 | dTHX; |
| 1892 | va_list args; |
| 1893 | PERL_ARGS_ASSERT_WARNER_NOCONTEXT; |
| 1894 | va_start(args, pat); |
| 1895 | vwarner(err, pat, &args); |
| 1896 | va_end(args); |
| 1897 | } |
| 1898 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 1899 | |
| 1900 | void |
| 1901 | Perl_ck_warner_d(pTHX_ U32 err, const char* pat, ...) |
| 1902 | { |
| 1903 | PERL_ARGS_ASSERT_CK_WARNER_D; |
| 1904 | |
| 1905 | if (Perl_ckwarn_d(aTHX_ err)) { |
| 1906 | va_list args; |
| 1907 | va_start(args, pat); |
| 1908 | vwarner(err, pat, &args); |
| 1909 | va_end(args); |
| 1910 | } |
| 1911 | } |
| 1912 | |
| 1913 | void |
| 1914 | Perl_ck_warner(pTHX_ U32 err, const char* pat, ...) |
| 1915 | { |
| 1916 | PERL_ARGS_ASSERT_CK_WARNER; |
| 1917 | |
| 1918 | if (Perl_ckwarn(aTHX_ err)) { |
| 1919 | va_list args; |
| 1920 | va_start(args, pat); |
| 1921 | vwarner(err, pat, &args); |
| 1922 | va_end(args); |
| 1923 | } |
| 1924 | } |
| 1925 | |
| 1926 | void |
| 1927 | Perl_warner(pTHX_ U32 err, const char* pat,...) |
| 1928 | { |
| 1929 | va_list args; |
| 1930 | PERL_ARGS_ASSERT_WARNER; |
| 1931 | va_start(args, pat); |
| 1932 | vwarner(err, pat, &args); |
| 1933 | va_end(args); |
| 1934 | } |
| 1935 | |
| 1936 | void |
| 1937 | Perl_vwarner(pTHX_ U32 err, const char* pat, va_list* args) |
| 1938 | { |
| 1939 | dVAR; |
| 1940 | PERL_ARGS_ASSERT_VWARNER; |
| 1941 | if ( |
| 1942 | (PL_warnhook == PERL_WARNHOOK_FATAL || ckDEAD(err)) && |
| 1943 | !(PL_in_eval & EVAL_KEEPERR) |
| 1944 | ) { |
| 1945 | SV * const msv = vmess(pat, args); |
| 1946 | |
| 1947 | if (PL_parser && PL_parser->error_count) { |
| 1948 | qerror(msv); |
| 1949 | } |
| 1950 | else { |
| 1951 | invoke_exception_hook(msv, FALSE); |
| 1952 | die_unwind(msv); |
| 1953 | } |
| 1954 | } |
| 1955 | else { |
| 1956 | Perl_vwarn(aTHX_ pat, args); |
| 1957 | } |
| 1958 | } |
| 1959 | |
| 1960 | /* implements the ckWARN? macros */ |
| 1961 | |
| 1962 | bool |
| 1963 | Perl_ckwarn(pTHX_ U32 w) |
| 1964 | { |
| 1965 | /* If lexical warnings have not been set, use $^W. */ |
| 1966 | if (isLEXWARN_off) |
| 1967 | return PL_dowarn & G_WARN_ON; |
| 1968 | |
| 1969 | return ckwarn_common(w); |
| 1970 | } |
| 1971 | |
| 1972 | /* implements the ckWARN?_d macro */ |
| 1973 | |
| 1974 | bool |
| 1975 | Perl_ckwarn_d(pTHX_ U32 w) |
| 1976 | { |
| 1977 | /* If lexical warnings have not been set then default classes warn. */ |
| 1978 | if (isLEXWARN_off) |
| 1979 | return TRUE; |
| 1980 | |
| 1981 | return ckwarn_common(w); |
| 1982 | } |
| 1983 | |
| 1984 | static bool |
| 1985 | S_ckwarn_common(pTHX_ U32 w) |
| 1986 | { |
| 1987 | if (PL_curcop->cop_warnings == pWARN_ALL) |
| 1988 | return TRUE; |
| 1989 | |
| 1990 | if (PL_curcop->cop_warnings == pWARN_NONE) |
| 1991 | return FALSE; |
| 1992 | |
| 1993 | /* Check the assumption that at least the first slot is non-zero. */ |
| 1994 | assert(unpackWARN1(w)); |
| 1995 | |
| 1996 | /* Check the assumption that it is valid to stop as soon as a zero slot is |
| 1997 | seen. */ |
| 1998 | if (!unpackWARN2(w)) { |
| 1999 | assert(!unpackWARN3(w)); |
| 2000 | assert(!unpackWARN4(w)); |
| 2001 | } else if (!unpackWARN3(w)) { |
| 2002 | assert(!unpackWARN4(w)); |
| 2003 | } |
| 2004 | |
| 2005 | /* Right, dealt with all the special cases, which are implemented as non- |
| 2006 | pointers, so there is a pointer to a real warnings mask. */ |
| 2007 | do { |
| 2008 | if (isWARN_on(PL_curcop->cop_warnings, unpackWARN1(w))) |
| 2009 | return TRUE; |
| 2010 | } while (w >>= WARNshift); |
| 2011 | |
| 2012 | return FALSE; |
| 2013 | } |
| 2014 | |
| 2015 | /* Set buffer=NULL to get a new one. */ |
| 2016 | STRLEN * |
| 2017 | Perl_new_warnings_bitfield(pTHX_ STRLEN *buffer, const char *const bits, |
| 2018 | STRLEN size) { |
| 2019 | const MEM_SIZE len_wanted = |
| 2020 | sizeof(STRLEN) + (size > WARNsize ? size : WARNsize); |
| 2021 | PERL_UNUSED_CONTEXT; |
| 2022 | PERL_ARGS_ASSERT_NEW_WARNINGS_BITFIELD; |
| 2023 | |
| 2024 | buffer = (STRLEN*) |
| 2025 | (specialWARN(buffer) ? |
| 2026 | PerlMemShared_malloc(len_wanted) : |
| 2027 | PerlMemShared_realloc(buffer, len_wanted)); |
| 2028 | buffer[0] = size; |
| 2029 | Copy(bits, (buffer + 1), size, char); |
| 2030 | if (size < WARNsize) |
| 2031 | Zero((char *)(buffer + 1) + size, WARNsize - size, char); |
| 2032 | return buffer; |
| 2033 | } |
| 2034 | |
| 2035 | /* since we've already done strlen() for both nam and val |
| 2036 | * we can use that info to make things faster than |
| 2037 | * sprintf(s, "%s=%s", nam, val) |
| 2038 | */ |
| 2039 | #define my_setenv_format(s, nam, nlen, val, vlen) \ |
| 2040 | Copy(nam, s, nlen, char); \ |
| 2041 | *(s+nlen) = '='; \ |
| 2042 | Copy(val, s+(nlen+1), vlen, char); \ |
| 2043 | *(s+(nlen+1+vlen)) = '\0' |
| 2044 | |
| 2045 | #ifdef USE_ENVIRON_ARRAY |
| 2046 | /* VMS' my_setenv() is in vms.c */ |
| 2047 | #if !defined(WIN32) && !defined(NETWARE) |
| 2048 | void |
| 2049 | Perl_my_setenv(pTHX_ const char *nam, const char *val) |
| 2050 | { |
| 2051 | dVAR; |
| 2052 | #ifdef USE_ITHREADS |
| 2053 | /* only parent thread can modify process environment */ |
| 2054 | if (PL_curinterp == aTHX) |
| 2055 | #endif |
| 2056 | { |
| 2057 | #ifndef PERL_USE_SAFE_PUTENV |
| 2058 | if (!PL_use_safe_putenv) { |
| 2059 | /* most putenv()s leak, so we manipulate environ directly */ |
| 2060 | I32 i; |
| 2061 | const I32 len = strlen(nam); |
| 2062 | int nlen, vlen; |
| 2063 | |
| 2064 | /* where does it go? */ |
| 2065 | for (i = 0; environ[i]; i++) { |
| 2066 | if (strnEQ(environ[i],nam,len) && environ[i][len] == '=') |
| 2067 | break; |
| 2068 | } |
| 2069 | |
| 2070 | if (environ == PL_origenviron) { /* need we copy environment? */ |
| 2071 | I32 j; |
| 2072 | I32 max; |
| 2073 | char **tmpenv; |
| 2074 | |
| 2075 | max = i; |
| 2076 | while (environ[max]) |
| 2077 | max++; |
| 2078 | tmpenv = (char**)safesysmalloc((max+2) * sizeof(char*)); |
| 2079 | for (j=0; j<max; j++) { /* copy environment */ |
| 2080 | const int len = strlen(environ[j]); |
| 2081 | tmpenv[j] = (char*)safesysmalloc((len+1)*sizeof(char)); |
| 2082 | Copy(environ[j], tmpenv[j], len+1, char); |
| 2083 | } |
| 2084 | tmpenv[max] = NULL; |
| 2085 | environ = tmpenv; /* tell exec where it is now */ |
| 2086 | } |
| 2087 | if (!val) { |
| 2088 | safesysfree(environ[i]); |
| 2089 | while (environ[i]) { |
| 2090 | environ[i] = environ[i+1]; |
| 2091 | i++; |
| 2092 | } |
| 2093 | return; |
| 2094 | } |
| 2095 | if (!environ[i]) { /* does not exist yet */ |
| 2096 | environ = (char**)safesysrealloc(environ, (i+2) * sizeof(char*)); |
| 2097 | environ[i+1] = NULL; /* make sure it's null terminated */ |
| 2098 | } |
| 2099 | else |
| 2100 | safesysfree(environ[i]); |
| 2101 | nlen = strlen(nam); |
| 2102 | vlen = strlen(val); |
| 2103 | |
| 2104 | environ[i] = (char*)safesysmalloc((nlen+vlen+2) * sizeof(char)); |
| 2105 | /* all that work just for this */ |
| 2106 | my_setenv_format(environ[i], nam, nlen, val, vlen); |
| 2107 | } else { |
| 2108 | # endif |
| 2109 | /* This next branch should only be called #if defined(HAS_SETENV), but |
| 2110 | Configure doesn't test for that yet. For Solaris, setenv() and unsetenv() |
| 2111 | were introduced in Solaris 9, so testing for HAS UNSETENV is sufficient. |
| 2112 | */ |
| 2113 | # if defined(__CYGWIN__)|| defined(__SYMBIAN32__) || defined(__riscos__) || (defined(__sun) && defined(HAS_UNSETENV)) |
| 2114 | # if defined(HAS_UNSETENV) |
| 2115 | if (val == NULL) { |
| 2116 | (void)unsetenv(nam); |
| 2117 | } else { |
| 2118 | (void)setenv(nam, val, 1); |
| 2119 | } |
| 2120 | # else /* ! HAS_UNSETENV */ |
| 2121 | (void)setenv(nam, val, 1); |
| 2122 | # endif /* HAS_UNSETENV */ |
| 2123 | # else |
| 2124 | # if defined(HAS_UNSETENV) |
| 2125 | if (val == NULL) { |
| 2126 | if (environ) /* old glibc can crash with null environ */ |
| 2127 | (void)unsetenv(nam); |
| 2128 | } else { |
| 2129 | const int nlen = strlen(nam); |
| 2130 | const int vlen = strlen(val); |
| 2131 | char * const new_env = |
| 2132 | (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char)); |
| 2133 | my_setenv_format(new_env, nam, nlen, val, vlen); |
| 2134 | (void)putenv(new_env); |
| 2135 | } |
| 2136 | # else /* ! HAS_UNSETENV */ |
| 2137 | char *new_env; |
| 2138 | const int nlen = strlen(nam); |
| 2139 | int vlen; |
| 2140 | if (!val) { |
| 2141 | val = ""; |
| 2142 | } |
| 2143 | vlen = strlen(val); |
| 2144 | new_env = (char*)safesysmalloc((nlen + vlen + 2) * sizeof(char)); |
| 2145 | /* all that work just for this */ |
| 2146 | my_setenv_format(new_env, nam, nlen, val, vlen); |
| 2147 | (void)putenv(new_env); |
| 2148 | # endif /* HAS_UNSETENV */ |
| 2149 | # endif /* __CYGWIN__ */ |
| 2150 | #ifndef PERL_USE_SAFE_PUTENV |
| 2151 | } |
| 2152 | #endif |
| 2153 | } |
| 2154 | } |
| 2155 | |
| 2156 | #else /* WIN32 || NETWARE */ |
| 2157 | |
| 2158 | void |
| 2159 | Perl_my_setenv(pTHX_ const char *nam, const char *val) |
| 2160 | { |
| 2161 | dVAR; |
| 2162 | char *envstr; |
| 2163 | const int nlen = strlen(nam); |
| 2164 | int vlen; |
| 2165 | |
| 2166 | if (!val) { |
| 2167 | val = ""; |
| 2168 | } |
| 2169 | vlen = strlen(val); |
| 2170 | Newx(envstr, nlen+vlen+2, char); |
| 2171 | my_setenv_format(envstr, nam, nlen, val, vlen); |
| 2172 | (void)PerlEnv_putenv(envstr); |
| 2173 | Safefree(envstr); |
| 2174 | } |
| 2175 | |
| 2176 | #endif /* WIN32 || NETWARE */ |
| 2177 | |
| 2178 | #endif /* !VMS */ |
| 2179 | |
| 2180 | #ifdef UNLINK_ALL_VERSIONS |
| 2181 | I32 |
| 2182 | Perl_unlnk(pTHX_ const char *f) /* unlink all versions of a file */ |
| 2183 | { |
| 2184 | I32 retries = 0; |
| 2185 | |
| 2186 | PERL_ARGS_ASSERT_UNLNK; |
| 2187 | |
| 2188 | while (PerlLIO_unlink(f) >= 0) |
| 2189 | retries++; |
| 2190 | return retries ? 0 : -1; |
| 2191 | } |
| 2192 | #endif |
| 2193 | |
| 2194 | /* this is a drop-in replacement for bcopy() */ |
| 2195 | #if (!defined(HAS_MEMCPY) && !defined(HAS_BCOPY)) || (!defined(HAS_MEMMOVE) && !defined(HAS_SAFE_MEMCPY) && !defined(HAS_SAFE_BCOPY)) |
| 2196 | char * |
| 2197 | Perl_my_bcopy(const char *from, char *to, I32 len) |
| 2198 | { |
| 2199 | char * const retval = to; |
| 2200 | |
| 2201 | PERL_ARGS_ASSERT_MY_BCOPY; |
| 2202 | |
| 2203 | assert(len >= 0); |
| 2204 | |
| 2205 | if (from - to >= 0) { |
| 2206 | while (len--) |
| 2207 | *to++ = *from++; |
| 2208 | } |
| 2209 | else { |
| 2210 | to += len; |
| 2211 | from += len; |
| 2212 | while (len--) |
| 2213 | *(--to) = *(--from); |
| 2214 | } |
| 2215 | return retval; |
| 2216 | } |
| 2217 | #endif |
| 2218 | |
| 2219 | /* this is a drop-in replacement for memset() */ |
| 2220 | #ifndef HAS_MEMSET |
| 2221 | void * |
| 2222 | Perl_my_memset(char *loc, I32 ch, I32 len) |
| 2223 | { |
| 2224 | char * const retval = loc; |
| 2225 | |
| 2226 | PERL_ARGS_ASSERT_MY_MEMSET; |
| 2227 | |
| 2228 | assert(len >= 0); |
| 2229 | |
| 2230 | while (len--) |
| 2231 | *loc++ = ch; |
| 2232 | return retval; |
| 2233 | } |
| 2234 | #endif |
| 2235 | |
| 2236 | /* this is a drop-in replacement for bzero() */ |
| 2237 | #if !defined(HAS_BZERO) && !defined(HAS_MEMSET) |
| 2238 | char * |
| 2239 | Perl_my_bzero(char *loc, I32 len) |
| 2240 | { |
| 2241 | char * const retval = loc; |
| 2242 | |
| 2243 | PERL_ARGS_ASSERT_MY_BZERO; |
| 2244 | |
| 2245 | assert(len >= 0); |
| 2246 | |
| 2247 | while (len--) |
| 2248 | *loc++ = 0; |
| 2249 | return retval; |
| 2250 | } |
| 2251 | #endif |
| 2252 | |
| 2253 | /* this is a drop-in replacement for memcmp() */ |
| 2254 | #if !defined(HAS_MEMCMP) || !defined(HAS_SANE_MEMCMP) |
| 2255 | I32 |
| 2256 | Perl_my_memcmp(const char *s1, const char *s2, I32 len) |
| 2257 | { |
| 2258 | const U8 *a = (const U8 *)s1; |
| 2259 | const U8 *b = (const U8 *)s2; |
| 2260 | I32 tmp; |
| 2261 | |
| 2262 | PERL_ARGS_ASSERT_MY_MEMCMP; |
| 2263 | |
| 2264 | assert(len >= 0); |
| 2265 | |
| 2266 | while (len--) { |
| 2267 | if ((tmp = *a++ - *b++)) |
| 2268 | return tmp; |
| 2269 | } |
| 2270 | return 0; |
| 2271 | } |
| 2272 | #endif /* !HAS_MEMCMP || !HAS_SANE_MEMCMP */ |
| 2273 | |
| 2274 | #ifndef HAS_VPRINTF |
| 2275 | /* This vsprintf replacement should generally never get used, since |
| 2276 | vsprintf was available in both System V and BSD 2.11. (There may |
| 2277 | be some cross-compilation or embedded set-ups where it is needed, |
| 2278 | however.) |
| 2279 | |
| 2280 | If you encounter a problem in this function, it's probably a symptom |
| 2281 | that Configure failed to detect your system's vprintf() function. |
| 2282 | See the section on "item vsprintf" in the INSTALL file. |
| 2283 | |
| 2284 | This version may compile on systems with BSD-ish <stdio.h>, |
| 2285 | but probably won't on others. |
| 2286 | */ |
| 2287 | |
| 2288 | #ifdef USE_CHAR_VSPRINTF |
| 2289 | char * |
| 2290 | #else |
| 2291 | int |
| 2292 | #endif |
| 2293 | vsprintf(char *dest, const char *pat, void *args) |
| 2294 | { |
| 2295 | FILE fakebuf; |
| 2296 | |
| 2297 | #if defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE) |
| 2298 | FILE_ptr(&fakebuf) = (STDCHAR *) dest; |
| 2299 | FILE_cnt(&fakebuf) = 32767; |
| 2300 | #else |
| 2301 | /* These probably won't compile -- If you really need |
| 2302 | this, you'll have to figure out some other method. */ |
| 2303 | fakebuf._ptr = dest; |
| 2304 | fakebuf._cnt = 32767; |
| 2305 | #endif |
| 2306 | #ifndef _IOSTRG |
| 2307 | #define _IOSTRG 0 |
| 2308 | #endif |
| 2309 | fakebuf._flag = _IOWRT|_IOSTRG; |
| 2310 | _doprnt(pat, args, &fakebuf); /* what a kludge */ |
| 2311 | #if defined(STDIO_PTR_LVALUE) |
| 2312 | *(FILE_ptr(&fakebuf)++) = '\0'; |
| 2313 | #else |
| 2314 | /* PerlIO has probably #defined away fputc, but we want it here. */ |
| 2315 | # ifdef fputc |
| 2316 | # undef fputc /* XXX Should really restore it later */ |
| 2317 | # endif |
| 2318 | (void)fputc('\0', &fakebuf); |
| 2319 | #endif |
| 2320 | #ifdef USE_CHAR_VSPRINTF |
| 2321 | return(dest); |
| 2322 | #else |
| 2323 | return 0; /* perl doesn't use return value */ |
| 2324 | #endif |
| 2325 | } |
| 2326 | |
| 2327 | #endif /* HAS_VPRINTF */ |
| 2328 | |
| 2329 | PerlIO * |
| 2330 | Perl_my_popen_list(pTHX_ const char *mode, int n, SV **args) |
| 2331 | { |
| 2332 | #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(OS2) && !defined(VMS) && !defined(NETWARE) && !defined(__LIBCATAMOUNT__) |
| 2333 | int p[2]; |
| 2334 | I32 This, that; |
| 2335 | Pid_t pid; |
| 2336 | SV *sv; |
| 2337 | I32 did_pipes = 0; |
| 2338 | int pp[2]; |
| 2339 | |
| 2340 | PERL_ARGS_ASSERT_MY_POPEN_LIST; |
| 2341 | |
| 2342 | PERL_FLUSHALL_FOR_CHILD; |
| 2343 | This = (*mode == 'w'); |
| 2344 | that = !This; |
| 2345 | if (TAINTING_get) { |
| 2346 | taint_env(); |
| 2347 | taint_proper("Insecure %s%s", "EXEC"); |
| 2348 | } |
| 2349 | if (PerlProc_pipe(p) < 0) |
| 2350 | return NULL; |
| 2351 | /* Try for another pipe pair for error return */ |
| 2352 | if (PerlProc_pipe(pp) >= 0) |
| 2353 | did_pipes = 1; |
| 2354 | while ((pid = PerlProc_fork()) < 0) { |
| 2355 | if (errno != EAGAIN) { |
| 2356 | PerlLIO_close(p[This]); |
| 2357 | PerlLIO_close(p[that]); |
| 2358 | if (did_pipes) { |
| 2359 | PerlLIO_close(pp[0]); |
| 2360 | PerlLIO_close(pp[1]); |
| 2361 | } |
| 2362 | return NULL; |
| 2363 | } |
| 2364 | Perl_ck_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds"); |
| 2365 | sleep(5); |
| 2366 | } |
| 2367 | if (pid == 0) { |
| 2368 | /* Child */ |
| 2369 | #undef THIS |
| 2370 | #undef THAT |
| 2371 | #define THIS that |
| 2372 | #define THAT This |
| 2373 | /* Close parent's end of error status pipe (if any) */ |
| 2374 | if (did_pipes) { |
| 2375 | PerlLIO_close(pp[0]); |
| 2376 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 2377 | /* Close error pipe automatically if exec works */ |
| 2378 | if (fcntl(pp[1], F_SETFD, FD_CLOEXEC) < 0) |
| 2379 | return NULL; |
| 2380 | #endif |
| 2381 | } |
| 2382 | /* Now dup our end of _the_ pipe to right position */ |
| 2383 | if (p[THIS] != (*mode == 'r')) { |
| 2384 | PerlLIO_dup2(p[THIS], *mode == 'r'); |
| 2385 | PerlLIO_close(p[THIS]); |
| 2386 | if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */ |
| 2387 | PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */ |
| 2388 | } |
| 2389 | else |
| 2390 | PerlLIO_close(p[THAT]); /* close parent's end of _the_ pipe */ |
| 2391 | #if !defined(HAS_FCNTL) || !defined(F_SETFD) |
| 2392 | /* No automatic close - do it by hand */ |
| 2393 | # ifndef NOFILE |
| 2394 | # define NOFILE 20 |
| 2395 | # endif |
| 2396 | { |
| 2397 | int fd; |
| 2398 | |
| 2399 | for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) { |
| 2400 | if (fd != pp[1]) |
| 2401 | PerlLIO_close(fd); |
| 2402 | } |
| 2403 | } |
| 2404 | #endif |
| 2405 | do_aexec5(NULL, args-1, args-1+n, pp[1], did_pipes); |
| 2406 | PerlProc__exit(1); |
| 2407 | #undef THIS |
| 2408 | #undef THAT |
| 2409 | } |
| 2410 | /* Parent */ |
| 2411 | do_execfree(); /* free any memory malloced by child on fork */ |
| 2412 | if (did_pipes) |
| 2413 | PerlLIO_close(pp[1]); |
| 2414 | /* Keep the lower of the two fd numbers */ |
| 2415 | if (p[that] < p[This]) { |
| 2416 | PerlLIO_dup2(p[This], p[that]); |
| 2417 | PerlLIO_close(p[This]); |
| 2418 | p[This] = p[that]; |
| 2419 | } |
| 2420 | else |
| 2421 | PerlLIO_close(p[that]); /* close child's end of pipe */ |
| 2422 | |
| 2423 | sv = *av_fetch(PL_fdpid,p[This],TRUE); |
| 2424 | SvUPGRADE(sv,SVt_IV); |
| 2425 | SvIV_set(sv, pid); |
| 2426 | PL_forkprocess = pid; |
| 2427 | /* If we managed to get status pipe check for exec fail */ |
| 2428 | if (did_pipes && pid > 0) { |
| 2429 | int errkid; |
| 2430 | unsigned n = 0; |
| 2431 | SSize_t n1; |
| 2432 | |
| 2433 | while (n < sizeof(int)) { |
| 2434 | n1 = PerlLIO_read(pp[0], |
| 2435 | (void*)(((char*)&errkid)+n), |
| 2436 | (sizeof(int)) - n); |
| 2437 | if (n1 <= 0) |
| 2438 | break; |
| 2439 | n += n1; |
| 2440 | } |
| 2441 | PerlLIO_close(pp[0]); |
| 2442 | did_pipes = 0; |
| 2443 | if (n) { /* Error */ |
| 2444 | int pid2, status; |
| 2445 | PerlLIO_close(p[This]); |
| 2446 | if (n != sizeof(int)) |
| 2447 | Perl_croak(aTHX_ "panic: kid popen errno read, n=%u", n); |
| 2448 | do { |
| 2449 | pid2 = wait4pid(pid, &status, 0); |
| 2450 | } while (pid2 == -1 && errno == EINTR); |
| 2451 | errno = errkid; /* Propagate errno from kid */ |
| 2452 | return NULL; |
| 2453 | } |
| 2454 | } |
| 2455 | if (did_pipes) |
| 2456 | PerlLIO_close(pp[0]); |
| 2457 | return PerlIO_fdopen(p[This], mode); |
| 2458 | #else |
| 2459 | # if defined(OS2) /* Same, without fork()ing and all extra overhead... */ |
| 2460 | return my_syspopen4(aTHX_ NULL, mode, n, args); |
| 2461 | # elif defined(WIN32) |
| 2462 | return win32_popenlist(mode, n, args); |
| 2463 | # else |
| 2464 | Perl_croak(aTHX_ "List form of piped open not implemented"); |
| 2465 | return (PerlIO *) NULL; |
| 2466 | # endif |
| 2467 | #endif |
| 2468 | } |
| 2469 | |
| 2470 | /* VMS' my_popen() is in VMS.c, same with OS/2. */ |
| 2471 | #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__LIBCATAMOUNT__) |
| 2472 | PerlIO * |
| 2473 | Perl_my_popen(pTHX_ const char *cmd, const char *mode) |
| 2474 | { |
| 2475 | int p[2]; |
| 2476 | I32 This, that; |
| 2477 | Pid_t pid; |
| 2478 | SV *sv; |
| 2479 | const I32 doexec = !(*cmd == '-' && cmd[1] == '\0'); |
| 2480 | I32 did_pipes = 0; |
| 2481 | int pp[2]; |
| 2482 | |
| 2483 | PERL_ARGS_ASSERT_MY_POPEN; |
| 2484 | |
| 2485 | PERL_FLUSHALL_FOR_CHILD; |
| 2486 | #ifdef OS2 |
| 2487 | if (doexec) { |
| 2488 | return my_syspopen(aTHX_ cmd,mode); |
| 2489 | } |
| 2490 | #endif |
| 2491 | This = (*mode == 'w'); |
| 2492 | that = !This; |
| 2493 | if (doexec && TAINTING_get) { |
| 2494 | taint_env(); |
| 2495 | taint_proper("Insecure %s%s", "EXEC"); |
| 2496 | } |
| 2497 | if (PerlProc_pipe(p) < 0) |
| 2498 | return NULL; |
| 2499 | if (doexec && PerlProc_pipe(pp) >= 0) |
| 2500 | did_pipes = 1; |
| 2501 | while ((pid = PerlProc_fork()) < 0) { |
| 2502 | if (errno != EAGAIN) { |
| 2503 | PerlLIO_close(p[This]); |
| 2504 | PerlLIO_close(p[that]); |
| 2505 | if (did_pipes) { |
| 2506 | PerlLIO_close(pp[0]); |
| 2507 | PerlLIO_close(pp[1]); |
| 2508 | } |
| 2509 | if (!doexec) |
| 2510 | Perl_croak(aTHX_ "Can't fork: %s", Strerror(errno)); |
| 2511 | return NULL; |
| 2512 | } |
| 2513 | Perl_ck_warner(aTHX_ packWARN(WARN_PIPE), "Can't fork, trying again in 5 seconds"); |
| 2514 | sleep(5); |
| 2515 | } |
| 2516 | if (pid == 0) { |
| 2517 | |
| 2518 | #undef THIS |
| 2519 | #undef THAT |
| 2520 | #define THIS that |
| 2521 | #define THAT This |
| 2522 | if (did_pipes) { |
| 2523 | PerlLIO_close(pp[0]); |
| 2524 | #if defined(HAS_FCNTL) && defined(F_SETFD) |
| 2525 | if (fcntl(pp[1], F_SETFD, FD_CLOEXEC) < 0) |
| 2526 | return NULL; |
| 2527 | #endif |
| 2528 | } |
| 2529 | if (p[THIS] != (*mode == 'r')) { |
| 2530 | PerlLIO_dup2(p[THIS], *mode == 'r'); |
| 2531 | PerlLIO_close(p[THIS]); |
| 2532 | if (p[THAT] != (*mode == 'r')) /* if dup2() didn't close it */ |
| 2533 | PerlLIO_close(p[THAT]); |
| 2534 | } |
| 2535 | else |
| 2536 | PerlLIO_close(p[THAT]); |
| 2537 | #ifndef OS2 |
| 2538 | if (doexec) { |
| 2539 | #if !defined(HAS_FCNTL) || !defined(F_SETFD) |
| 2540 | #ifndef NOFILE |
| 2541 | #define NOFILE 20 |
| 2542 | #endif |
| 2543 | { |
| 2544 | int fd; |
| 2545 | |
| 2546 | for (fd = PL_maxsysfd + 1; fd < NOFILE; fd++) |
| 2547 | if (fd != pp[1]) |
| 2548 | PerlLIO_close(fd); |
| 2549 | } |
| 2550 | #endif |
| 2551 | /* may or may not use the shell */ |
| 2552 | do_exec3(cmd, pp[1], did_pipes); |
| 2553 | PerlProc__exit(1); |
| 2554 | } |
| 2555 | #endif /* defined OS2 */ |
| 2556 | |
| 2557 | #ifdef PERLIO_USING_CRLF |
| 2558 | /* Since we circumvent IO layers when we manipulate low-level |
| 2559 | filedescriptors directly, need to manually switch to the |
| 2560 | default, binary, low-level mode; see PerlIOBuf_open(). */ |
| 2561 | PerlLIO_setmode((*mode == 'r'), O_BINARY); |
| 2562 | #endif |
| 2563 | PL_forkprocess = 0; |
| 2564 | #ifdef PERL_USES_PL_PIDSTATUS |
| 2565 | hv_clear(PL_pidstatus); /* we have no children */ |
| 2566 | #endif |
| 2567 | return NULL; |
| 2568 | #undef THIS |
| 2569 | #undef THAT |
| 2570 | } |
| 2571 | do_execfree(); /* free any memory malloced by child on vfork */ |
| 2572 | if (did_pipes) |
| 2573 | PerlLIO_close(pp[1]); |
| 2574 | if (p[that] < p[This]) { |
| 2575 | PerlLIO_dup2(p[This], p[that]); |
| 2576 | PerlLIO_close(p[This]); |
| 2577 | p[This] = p[that]; |
| 2578 | } |
| 2579 | else |
| 2580 | PerlLIO_close(p[that]); |
| 2581 | |
| 2582 | sv = *av_fetch(PL_fdpid,p[This],TRUE); |
| 2583 | SvUPGRADE(sv,SVt_IV); |
| 2584 | SvIV_set(sv, pid); |
| 2585 | PL_forkprocess = pid; |
| 2586 | if (did_pipes && pid > 0) { |
| 2587 | int errkid; |
| 2588 | unsigned n = 0; |
| 2589 | SSize_t n1; |
| 2590 | |
| 2591 | while (n < sizeof(int)) { |
| 2592 | n1 = PerlLIO_read(pp[0], |
| 2593 | (void*)(((char*)&errkid)+n), |
| 2594 | (sizeof(int)) - n); |
| 2595 | if (n1 <= 0) |
| 2596 | break; |
| 2597 | n += n1; |
| 2598 | } |
| 2599 | PerlLIO_close(pp[0]); |
| 2600 | did_pipes = 0; |
| 2601 | if (n) { /* Error */ |
| 2602 | int pid2, status; |
| 2603 | PerlLIO_close(p[This]); |
| 2604 | if (n != sizeof(int)) |
| 2605 | Perl_croak(aTHX_ "panic: kid popen errno read, n=%u", n); |
| 2606 | do { |
| 2607 | pid2 = wait4pid(pid, &status, 0); |
| 2608 | } while (pid2 == -1 && errno == EINTR); |
| 2609 | errno = errkid; /* Propagate errno from kid */ |
| 2610 | return NULL; |
| 2611 | } |
| 2612 | } |
| 2613 | if (did_pipes) |
| 2614 | PerlLIO_close(pp[0]); |
| 2615 | return PerlIO_fdopen(p[This], mode); |
| 2616 | } |
| 2617 | #else |
| 2618 | #if defined(DJGPP) |
| 2619 | FILE *djgpp_popen(); |
| 2620 | PerlIO * |
| 2621 | Perl_my_popen(pTHX_ const char *cmd, const char *mode) |
| 2622 | { |
| 2623 | PERL_FLUSHALL_FOR_CHILD; |
| 2624 | /* Call system's popen() to get a FILE *, then import it. |
| 2625 | used 0 for 2nd parameter to PerlIO_importFILE; |
| 2626 | apparently not used |
| 2627 | */ |
| 2628 | return PerlIO_importFILE(djgpp_popen(cmd, mode), 0); |
| 2629 | } |
| 2630 | #else |
| 2631 | #if defined(__LIBCATAMOUNT__) |
| 2632 | PerlIO * |
| 2633 | Perl_my_popen(pTHX_ const char *cmd, const char *mode) |
| 2634 | { |
| 2635 | return NULL; |
| 2636 | } |
| 2637 | #endif |
| 2638 | #endif |
| 2639 | |
| 2640 | #endif /* !DOSISH */ |
| 2641 | |
| 2642 | /* this is called in parent before the fork() */ |
| 2643 | void |
| 2644 | Perl_atfork_lock(void) |
| 2645 | { |
| 2646 | #if defined(USE_ITHREADS) |
| 2647 | dVAR; |
| 2648 | /* locks must be held in locking order (if any) */ |
| 2649 | # ifdef USE_PERLIO |
| 2650 | MUTEX_LOCK(&PL_perlio_mutex); |
| 2651 | # endif |
| 2652 | # ifdef MYMALLOC |
| 2653 | MUTEX_LOCK(&PL_malloc_mutex); |
| 2654 | # endif |
| 2655 | OP_REFCNT_LOCK; |
| 2656 | #endif |
| 2657 | } |
| 2658 | |
| 2659 | /* this is called in both parent and child after the fork() */ |
| 2660 | void |
| 2661 | Perl_atfork_unlock(void) |
| 2662 | { |
| 2663 | #if defined(USE_ITHREADS) |
| 2664 | dVAR; |
| 2665 | /* locks must be released in same order as in atfork_lock() */ |
| 2666 | # ifdef USE_PERLIO |
| 2667 | MUTEX_UNLOCK(&PL_perlio_mutex); |
| 2668 | # endif |
| 2669 | # ifdef MYMALLOC |
| 2670 | MUTEX_UNLOCK(&PL_malloc_mutex); |
| 2671 | # endif |
| 2672 | OP_REFCNT_UNLOCK; |
| 2673 | #endif |
| 2674 | } |
| 2675 | |
| 2676 | Pid_t |
| 2677 | Perl_my_fork(void) |
| 2678 | { |
| 2679 | #if defined(HAS_FORK) |
| 2680 | Pid_t pid; |
| 2681 | #if defined(USE_ITHREADS) && !defined(HAS_PTHREAD_ATFORK) |
| 2682 | atfork_lock(); |
| 2683 | pid = fork(); |
| 2684 | atfork_unlock(); |
| 2685 | #else |
| 2686 | /* atfork_lock() and atfork_unlock() are installed as pthread_atfork() |
| 2687 | * handlers elsewhere in the code */ |
| 2688 | pid = fork(); |
| 2689 | #endif |
| 2690 | return pid; |
| 2691 | #else |
| 2692 | /* this "canna happen" since nothing should be calling here if !HAS_FORK */ |
| 2693 | Perl_croak_nocontext("fork() not available"); |
| 2694 | return 0; |
| 2695 | #endif /* HAS_FORK */ |
| 2696 | } |
| 2697 | |
| 2698 | #ifndef HAS_DUP2 |
| 2699 | int |
| 2700 | dup2(int oldfd, int newfd) |
| 2701 | { |
| 2702 | #if defined(HAS_FCNTL) && defined(F_DUPFD) |
| 2703 | if (oldfd == newfd) |
| 2704 | return oldfd; |
| 2705 | PerlLIO_close(newfd); |
| 2706 | return fcntl(oldfd, F_DUPFD, newfd); |
| 2707 | #else |
| 2708 | #define DUP2_MAX_FDS 256 |
| 2709 | int fdtmp[DUP2_MAX_FDS]; |
| 2710 | I32 fdx = 0; |
| 2711 | int fd; |
| 2712 | |
| 2713 | if (oldfd == newfd) |
| 2714 | return oldfd; |
| 2715 | PerlLIO_close(newfd); |
| 2716 | /* good enough for low fd's... */ |
| 2717 | while ((fd = PerlLIO_dup(oldfd)) != newfd && fd >= 0) { |
| 2718 | if (fdx >= DUP2_MAX_FDS) { |
| 2719 | PerlLIO_close(fd); |
| 2720 | fd = -1; |
| 2721 | break; |
| 2722 | } |
| 2723 | fdtmp[fdx++] = fd; |
| 2724 | } |
| 2725 | while (fdx > 0) |
| 2726 | PerlLIO_close(fdtmp[--fdx]); |
| 2727 | return fd; |
| 2728 | #endif |
| 2729 | } |
| 2730 | #endif |
| 2731 | |
| 2732 | #ifndef PERL_MICRO |
| 2733 | #ifdef HAS_SIGACTION |
| 2734 | |
| 2735 | Sighandler_t |
| 2736 | Perl_rsignal(pTHX_ int signo, Sighandler_t handler) |
| 2737 | { |
| 2738 | struct sigaction act, oact; |
| 2739 | |
| 2740 | #ifdef USE_ITHREADS |
| 2741 | dVAR; |
| 2742 | /* only "parent" interpreter can diddle signals */ |
| 2743 | if (PL_curinterp != aTHX) |
| 2744 | return (Sighandler_t) SIG_ERR; |
| 2745 | #endif |
| 2746 | |
| 2747 | act.sa_handler = (void(*)(int))handler; |
| 2748 | sigemptyset(&act.sa_mask); |
| 2749 | act.sa_flags = 0; |
| 2750 | #ifdef SA_RESTART |
| 2751 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) |
| 2752 | act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ |
| 2753 | #endif |
| 2754 | #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */ |
| 2755 | if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN) |
| 2756 | act.sa_flags |= SA_NOCLDWAIT; |
| 2757 | #endif |
| 2758 | if (sigaction(signo, &act, &oact) == -1) |
| 2759 | return (Sighandler_t) SIG_ERR; |
| 2760 | else |
| 2761 | return (Sighandler_t) oact.sa_handler; |
| 2762 | } |
| 2763 | |
| 2764 | Sighandler_t |
| 2765 | Perl_rsignal_state(pTHX_ int signo) |
| 2766 | { |
| 2767 | struct sigaction oact; |
| 2768 | PERL_UNUSED_CONTEXT; |
| 2769 | |
| 2770 | if (sigaction(signo, (struct sigaction *)NULL, &oact) == -1) |
| 2771 | return (Sighandler_t) SIG_ERR; |
| 2772 | else |
| 2773 | return (Sighandler_t) oact.sa_handler; |
| 2774 | } |
| 2775 | |
| 2776 | int |
| 2777 | Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save) |
| 2778 | { |
| 2779 | #ifdef USE_ITHREADS |
| 2780 | dVAR; |
| 2781 | #endif |
| 2782 | struct sigaction act; |
| 2783 | |
| 2784 | PERL_ARGS_ASSERT_RSIGNAL_SAVE; |
| 2785 | |
| 2786 | #ifdef USE_ITHREADS |
| 2787 | /* only "parent" interpreter can diddle signals */ |
| 2788 | if (PL_curinterp != aTHX) |
| 2789 | return -1; |
| 2790 | #endif |
| 2791 | |
| 2792 | act.sa_handler = (void(*)(int))handler; |
| 2793 | sigemptyset(&act.sa_mask); |
| 2794 | act.sa_flags = 0; |
| 2795 | #ifdef SA_RESTART |
| 2796 | if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) |
| 2797 | act.sa_flags |= SA_RESTART; /* SVR4, 4.3+BSD */ |
| 2798 | #endif |
| 2799 | #if defined(SA_NOCLDWAIT) && !defined(BSDish) /* See [perl #18849] */ |
| 2800 | if (signo == SIGCHLD && handler == (Sighandler_t) SIG_IGN) |
| 2801 | act.sa_flags |= SA_NOCLDWAIT; |
| 2802 | #endif |
| 2803 | return sigaction(signo, &act, save); |
| 2804 | } |
| 2805 | |
| 2806 | int |
| 2807 | Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) |
| 2808 | { |
| 2809 | #ifdef USE_ITHREADS |
| 2810 | dVAR; |
| 2811 | #endif |
| 2812 | PERL_UNUSED_CONTEXT; |
| 2813 | #ifdef USE_ITHREADS |
| 2814 | /* only "parent" interpreter can diddle signals */ |
| 2815 | if (PL_curinterp != aTHX) |
| 2816 | return -1; |
| 2817 | #endif |
| 2818 | |
| 2819 | return sigaction(signo, save, (struct sigaction *)NULL); |
| 2820 | } |
| 2821 | |
| 2822 | #else /* !HAS_SIGACTION */ |
| 2823 | |
| 2824 | Sighandler_t |
| 2825 | Perl_rsignal(pTHX_ int signo, Sighandler_t handler) |
| 2826 | { |
| 2827 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2828 | /* only "parent" interpreter can diddle signals */ |
| 2829 | if (PL_curinterp != aTHX) |
| 2830 | return (Sighandler_t) SIG_ERR; |
| 2831 | #endif |
| 2832 | |
| 2833 | return PerlProc_signal(signo, handler); |
| 2834 | } |
| 2835 | |
| 2836 | static Signal_t |
| 2837 | sig_trap(int signo) |
| 2838 | { |
| 2839 | dVAR; |
| 2840 | PL_sig_trapped++; |
| 2841 | } |
| 2842 | |
| 2843 | Sighandler_t |
| 2844 | Perl_rsignal_state(pTHX_ int signo) |
| 2845 | { |
| 2846 | dVAR; |
| 2847 | Sighandler_t oldsig; |
| 2848 | |
| 2849 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2850 | /* only "parent" interpreter can diddle signals */ |
| 2851 | if (PL_curinterp != aTHX) |
| 2852 | return (Sighandler_t) SIG_ERR; |
| 2853 | #endif |
| 2854 | |
| 2855 | PL_sig_trapped = 0; |
| 2856 | oldsig = PerlProc_signal(signo, sig_trap); |
| 2857 | PerlProc_signal(signo, oldsig); |
| 2858 | if (PL_sig_trapped) |
| 2859 | PerlProc_kill(PerlProc_getpid(), signo); |
| 2860 | return oldsig; |
| 2861 | } |
| 2862 | |
| 2863 | int |
| 2864 | Perl_rsignal_save(pTHX_ int signo, Sighandler_t handler, Sigsave_t *save) |
| 2865 | { |
| 2866 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2867 | /* only "parent" interpreter can diddle signals */ |
| 2868 | if (PL_curinterp != aTHX) |
| 2869 | return -1; |
| 2870 | #endif |
| 2871 | *save = PerlProc_signal(signo, handler); |
| 2872 | return (*save == (Sighandler_t) SIG_ERR) ? -1 : 0; |
| 2873 | } |
| 2874 | |
| 2875 | int |
| 2876 | Perl_rsignal_restore(pTHX_ int signo, Sigsave_t *save) |
| 2877 | { |
| 2878 | #if defined(USE_ITHREADS) && !defined(WIN32) |
| 2879 | /* only "parent" interpreter can diddle signals */ |
| 2880 | if (PL_curinterp != aTHX) |
| 2881 | return -1; |
| 2882 | #endif |
| 2883 | return (PerlProc_signal(signo, *save) == (Sighandler_t) SIG_ERR) ? -1 : 0; |
| 2884 | } |
| 2885 | |
| 2886 | #endif /* !HAS_SIGACTION */ |
| 2887 | #endif /* !PERL_MICRO */ |
| 2888 | |
| 2889 | /* VMS' my_pclose() is in VMS.c; same with OS/2 */ |
| 2890 | #if (!defined(DOSISH) || defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(__LIBCATAMOUNT__) |
| 2891 | I32 |
| 2892 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 2893 | { |
| 2894 | int status; |
| 2895 | SV **svp; |
| 2896 | Pid_t pid; |
| 2897 | Pid_t pid2 = 0; |
| 2898 | bool close_failed; |
| 2899 | dSAVEDERRNO; |
| 2900 | const int fd = PerlIO_fileno(ptr); |
| 2901 | bool should_wait; |
| 2902 | |
| 2903 | svp = av_fetch(PL_fdpid,fd,TRUE); |
| 2904 | pid = (SvTYPE(*svp) == SVt_IV) ? SvIVX(*svp) : -1; |
| 2905 | SvREFCNT_dec(*svp); |
| 2906 | *svp = NULL; |
| 2907 | |
| 2908 | #if defined(USE_PERLIO) |
| 2909 | /* Find out whether the refcount is low enough for us to wait for the |
| 2910 | child proc without blocking. */ |
| 2911 | should_wait = PerlIOUnix_refcnt(fd) == 1 && pid > 0; |
| 2912 | #else |
| 2913 | should_wait = pid > 0; |
| 2914 | #endif |
| 2915 | |
| 2916 | #ifdef OS2 |
| 2917 | if (pid == -1) { /* Opened by popen. */ |
| 2918 | return my_syspclose(ptr); |
| 2919 | } |
| 2920 | #endif |
| 2921 | close_failed = (PerlIO_close(ptr) == EOF); |
| 2922 | SAVE_ERRNO; |
| 2923 | if (should_wait) do { |
| 2924 | pid2 = wait4pid(pid, &status, 0); |
| 2925 | } while (pid2 == -1 && errno == EINTR); |
| 2926 | if (close_failed) { |
| 2927 | RESTORE_ERRNO; |
| 2928 | return -1; |
| 2929 | } |
| 2930 | return( |
| 2931 | should_wait |
| 2932 | ? pid2 < 0 ? pid2 : status == 0 ? 0 : (errno = 0, status) |
| 2933 | : 0 |
| 2934 | ); |
| 2935 | } |
| 2936 | #else |
| 2937 | #if defined(__LIBCATAMOUNT__) |
| 2938 | I32 |
| 2939 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 2940 | { |
| 2941 | return -1; |
| 2942 | } |
| 2943 | #endif |
| 2944 | #endif /* !DOSISH */ |
| 2945 | |
| 2946 | #if (!defined(DOSISH) || defined(OS2) || defined(WIN32) || defined(NETWARE)) && !defined(__LIBCATAMOUNT__) |
| 2947 | I32 |
| 2948 | Perl_wait4pid(pTHX_ Pid_t pid, int *statusp, int flags) |
| 2949 | { |
| 2950 | I32 result = 0; |
| 2951 | PERL_ARGS_ASSERT_WAIT4PID; |
| 2952 | #ifdef PERL_USES_PL_PIDSTATUS |
| 2953 | if (!pid) { |
| 2954 | /* PERL_USES_PL_PIDSTATUS is only defined when neither |
| 2955 | waitpid() nor wait4() is available, or on OS/2, which |
| 2956 | doesn't appear to support waiting for a progress group |
| 2957 | member, so we can only treat a 0 pid as an unknown child. |
| 2958 | */ |
| 2959 | errno = ECHILD; |
| 2960 | return -1; |
| 2961 | } |
| 2962 | { |
| 2963 | if (pid > 0) { |
| 2964 | /* The keys in PL_pidstatus are now the raw 4 (or 8) bytes of the |
| 2965 | pid, rather than a string form. */ |
| 2966 | SV * const * const svp = hv_fetch(PL_pidstatus,(const char*) &pid,sizeof(Pid_t),FALSE); |
| 2967 | if (svp && *svp != &PL_sv_undef) { |
| 2968 | *statusp = SvIVX(*svp); |
| 2969 | (void)hv_delete(PL_pidstatus,(const char*) &pid,sizeof(Pid_t), |
| 2970 | G_DISCARD); |
| 2971 | return pid; |
| 2972 | } |
| 2973 | } |
| 2974 | else { |
| 2975 | HE *entry; |
| 2976 | |
| 2977 | hv_iterinit(PL_pidstatus); |
| 2978 | if ((entry = hv_iternext(PL_pidstatus))) { |
| 2979 | SV * const sv = hv_iterval(PL_pidstatus,entry); |
| 2980 | I32 len; |
| 2981 | const char * const spid = hv_iterkey(entry,&len); |
| 2982 | |
| 2983 | assert (len == sizeof(Pid_t)); |
| 2984 | memcpy((char *)&pid, spid, len); |
| 2985 | *statusp = SvIVX(sv); |
| 2986 | /* The hash iterator is currently on this entry, so simply |
| 2987 | calling hv_delete would trigger the lazy delete, which on |
| 2988 | aggregate does more work, because next call to hv_iterinit() |
| 2989 | would spot the flag, and have to call the delete routine, |
| 2990 | while in the meantime any new entries can't re-use that |
| 2991 | memory. */ |
| 2992 | hv_iterinit(PL_pidstatus); |
| 2993 | (void)hv_delete(PL_pidstatus,spid,len,G_DISCARD); |
| 2994 | return pid; |
| 2995 | } |
| 2996 | } |
| 2997 | } |
| 2998 | #endif |
| 2999 | #ifdef HAS_WAITPID |
| 3000 | # ifdef HAS_WAITPID_RUNTIME |
| 3001 | if (!HAS_WAITPID_RUNTIME) |
| 3002 | goto hard_way; |
| 3003 | # endif |
| 3004 | result = PerlProc_waitpid(pid,statusp,flags); |
| 3005 | goto finish; |
| 3006 | #endif |
| 3007 | #if !defined(HAS_WAITPID) && defined(HAS_WAIT4) |
| 3008 | result = wait4(pid,statusp,flags,NULL); |
| 3009 | goto finish; |
| 3010 | #endif |
| 3011 | #ifdef PERL_USES_PL_PIDSTATUS |
| 3012 | #if defined(HAS_WAITPID) && defined(HAS_WAITPID_RUNTIME) |
| 3013 | hard_way: |
| 3014 | #endif |
| 3015 | { |
| 3016 | if (flags) |
| 3017 | Perl_croak(aTHX_ "Can't do waitpid with flags"); |
| 3018 | else { |
| 3019 | while ((result = PerlProc_wait(statusp)) != pid && pid > 0 && result >= 0) |
| 3020 | pidgone(result,*statusp); |
| 3021 | if (result < 0) |
| 3022 | *statusp = -1; |
| 3023 | } |
| 3024 | } |
| 3025 | #endif |
| 3026 | #if defined(HAS_WAITPID) || defined(HAS_WAIT4) |
| 3027 | finish: |
| 3028 | #endif |
| 3029 | if (result < 0 && errno == EINTR) { |
| 3030 | PERL_ASYNC_CHECK(); |
| 3031 | errno = EINTR; /* reset in case a signal handler changed $! */ |
| 3032 | } |
| 3033 | return result; |
| 3034 | } |
| 3035 | #endif /* !DOSISH || OS2 || WIN32 || NETWARE */ |
| 3036 | |
| 3037 | #ifdef PERL_USES_PL_PIDSTATUS |
| 3038 | void |
| 3039 | S_pidgone(pTHX_ Pid_t pid, int status) |
| 3040 | { |
| 3041 | SV *sv; |
| 3042 | |
| 3043 | sv = *hv_fetch(PL_pidstatus,(const char*)&pid,sizeof(Pid_t),TRUE); |
| 3044 | SvUPGRADE(sv,SVt_IV); |
| 3045 | SvIV_set(sv, status); |
| 3046 | return; |
| 3047 | } |
| 3048 | #endif |
| 3049 | |
| 3050 | #if defined(OS2) |
| 3051 | int pclose(); |
| 3052 | #ifdef HAS_FORK |
| 3053 | int /* Cannot prototype with I32 |
| 3054 | in os2ish.h. */ |
| 3055 | my_syspclose(PerlIO *ptr) |
| 3056 | #else |
| 3057 | I32 |
| 3058 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 3059 | #endif |
| 3060 | { |
| 3061 | /* Needs work for PerlIO ! */ |
| 3062 | FILE * const f = PerlIO_findFILE(ptr); |
| 3063 | const I32 result = pclose(f); |
| 3064 | PerlIO_releaseFILE(ptr,f); |
| 3065 | return result; |
| 3066 | } |
| 3067 | #endif |
| 3068 | |
| 3069 | #if defined(DJGPP) |
| 3070 | int djgpp_pclose(); |
| 3071 | I32 |
| 3072 | Perl_my_pclose(pTHX_ PerlIO *ptr) |
| 3073 | { |
| 3074 | /* Needs work for PerlIO ! */ |
| 3075 | FILE * const f = PerlIO_findFILE(ptr); |
| 3076 | I32 result = djgpp_pclose(f); |
| 3077 | result = (result << 8) & 0xff00; |
| 3078 | PerlIO_releaseFILE(ptr,f); |
| 3079 | return result; |
| 3080 | } |
| 3081 | #endif |
| 3082 | |
| 3083 | #define PERL_REPEATCPY_LINEAR 4 |
| 3084 | void |
| 3085 | Perl_repeatcpy(char *to, const char *from, I32 len, IV count) |
| 3086 | { |
| 3087 | PERL_ARGS_ASSERT_REPEATCPY; |
| 3088 | |
| 3089 | assert(len >= 0); |
| 3090 | |
| 3091 | if (count < 0) |
| 3092 | croak_memory_wrap(); |
| 3093 | |
| 3094 | if (len == 1) |
| 3095 | memset(to, *from, count); |
| 3096 | else if (count) { |
| 3097 | char *p = to; |
| 3098 | IV items, linear, half; |
| 3099 | |
| 3100 | linear = count < PERL_REPEATCPY_LINEAR ? count : PERL_REPEATCPY_LINEAR; |
| 3101 | for (items = 0; items < linear; ++items) { |
| 3102 | const char *q = from; |
| 3103 | IV todo; |
| 3104 | for (todo = len; todo > 0; todo--) |
| 3105 | *p++ = *q++; |
| 3106 | } |
| 3107 | |
| 3108 | half = count / 2; |
| 3109 | while (items <= half) { |
| 3110 | IV size = items * len; |
| 3111 | memcpy(p, to, size); |
| 3112 | p += size; |
| 3113 | items *= 2; |
| 3114 | } |
| 3115 | |
| 3116 | if (count > items) |
| 3117 | memcpy(p, to, (count - items) * len); |
| 3118 | } |
| 3119 | } |
| 3120 | |
| 3121 | #ifndef HAS_RENAME |
| 3122 | I32 |
| 3123 | Perl_same_dirent(pTHX_ const char *a, const char *b) |
| 3124 | { |
| 3125 | char *fa = strrchr(a,'/'); |
| 3126 | char *fb = strrchr(b,'/'); |
| 3127 | Stat_t tmpstatbuf1; |
| 3128 | Stat_t tmpstatbuf2; |
| 3129 | SV * const tmpsv = sv_newmortal(); |
| 3130 | |
| 3131 | PERL_ARGS_ASSERT_SAME_DIRENT; |
| 3132 | |
| 3133 | if (fa) |
| 3134 | fa++; |
| 3135 | else |
| 3136 | fa = a; |
| 3137 | if (fb) |
| 3138 | fb++; |
| 3139 | else |
| 3140 | fb = b; |
| 3141 | if (strNE(a,b)) |
| 3142 | return FALSE; |
| 3143 | if (fa == a) |
| 3144 | sv_setpvs(tmpsv, "."); |
| 3145 | else |
| 3146 | sv_setpvn(tmpsv, a, fa - a); |
| 3147 | if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf1) < 0) |
| 3148 | return FALSE; |
| 3149 | if (fb == b) |
| 3150 | sv_setpvs(tmpsv, "."); |
| 3151 | else |
| 3152 | sv_setpvn(tmpsv, b, fb - b); |
| 3153 | if (PerlLIO_stat(SvPVX_const(tmpsv), &tmpstatbuf2) < 0) |
| 3154 | return FALSE; |
| 3155 | return tmpstatbuf1.st_dev == tmpstatbuf2.st_dev && |
| 3156 | tmpstatbuf1.st_ino == tmpstatbuf2.st_ino; |
| 3157 | } |
| 3158 | #endif /* !HAS_RENAME */ |
| 3159 | |
| 3160 | char* |
| 3161 | Perl_find_script(pTHX_ const char *scriptname, bool dosearch, |
| 3162 | const char *const *const search_ext, I32 flags) |
| 3163 | { |
| 3164 | const char *xfound = NULL; |
| 3165 | char *xfailed = NULL; |
| 3166 | char tmpbuf[MAXPATHLEN]; |
| 3167 | char *s; |
| 3168 | I32 len = 0; |
| 3169 | int retval; |
| 3170 | char *bufend; |
| 3171 | #if defined(DOSISH) && !defined(OS2) |
| 3172 | # define SEARCH_EXTS ".bat", ".cmd", NULL |
| 3173 | # define MAX_EXT_LEN 4 |
| 3174 | #endif |
| 3175 | #ifdef OS2 |
| 3176 | # define SEARCH_EXTS ".cmd", ".btm", ".bat", ".pl", NULL |
| 3177 | # define MAX_EXT_LEN 4 |
| 3178 | #endif |
| 3179 | #ifdef VMS |
| 3180 | # define SEARCH_EXTS ".pl", ".com", NULL |
| 3181 | # define MAX_EXT_LEN 4 |
| 3182 | #endif |
| 3183 | /* additional extensions to try in each dir if scriptname not found */ |
| 3184 | #ifdef SEARCH_EXTS |
| 3185 | static const char *const exts[] = { SEARCH_EXTS }; |
| 3186 | const char *const *const ext = search_ext ? search_ext : exts; |
| 3187 | int extidx = 0, i = 0; |
| 3188 | const char *curext = NULL; |
| 3189 | #else |
| 3190 | PERL_UNUSED_ARG(search_ext); |
| 3191 | # define MAX_EXT_LEN 0 |
| 3192 | #endif |
| 3193 | |
| 3194 | PERL_ARGS_ASSERT_FIND_SCRIPT; |
| 3195 | |
| 3196 | /* |
| 3197 | * If dosearch is true and if scriptname does not contain path |
| 3198 | * delimiters, search the PATH for scriptname. |
| 3199 | * |
| 3200 | * If SEARCH_EXTS is also defined, will look for each |
| 3201 | * scriptname{SEARCH_EXTS} whenever scriptname is not found |
| 3202 | * while searching the PATH. |
| 3203 | * |
| 3204 | * Assuming SEARCH_EXTS is C<".foo",".bar",NULL>, PATH search |
| 3205 | * proceeds as follows: |
| 3206 | * If DOSISH or VMSISH: |
| 3207 | * + look for ./scriptname{,.foo,.bar} |
| 3208 | * + search the PATH for scriptname{,.foo,.bar} |
| 3209 | * |
| 3210 | * If !DOSISH: |
| 3211 | * + look *only* in the PATH for scriptname{,.foo,.bar} (note |
| 3212 | * this will not look in '.' if it's not in the PATH) |
| 3213 | */ |
| 3214 | tmpbuf[0] = '\0'; |
| 3215 | |
| 3216 | #ifdef VMS |
| 3217 | # ifdef ALWAYS_DEFTYPES |
| 3218 | len = strlen(scriptname); |
| 3219 | if (!(len == 1 && *scriptname == '-') && scriptname[len-1] != ':') { |
| 3220 | int idx = 0, deftypes = 1; |
| 3221 | bool seen_dot = 1; |
| 3222 | |
| 3223 | const int hasdir = !dosearch || (strpbrk(scriptname,":[</") != NULL); |
| 3224 | # else |
| 3225 | if (dosearch) { |
| 3226 | int idx = 0, deftypes = 1; |
| 3227 | bool seen_dot = 1; |
| 3228 | |
| 3229 | const int hasdir = (strpbrk(scriptname,":[</") != NULL); |
| 3230 | # endif |
| 3231 | /* The first time through, just add SEARCH_EXTS to whatever we |
| 3232 | * already have, so we can check for default file types. */ |
| 3233 | while (deftypes || |
| 3234 | (!hasdir && my_trnlnm("DCL$PATH",tmpbuf,idx++)) ) |
| 3235 | { |
| 3236 | if (deftypes) { |
| 3237 | deftypes = 0; |
| 3238 | *tmpbuf = '\0'; |
| 3239 | } |
| 3240 | if ((strlen(tmpbuf) + strlen(scriptname) |
| 3241 | + MAX_EXT_LEN) >= sizeof tmpbuf) |
| 3242 | continue; /* don't search dir with too-long name */ |
| 3243 | my_strlcat(tmpbuf, scriptname, sizeof(tmpbuf)); |
| 3244 | #else /* !VMS */ |
| 3245 | |
| 3246 | #ifdef DOSISH |
| 3247 | if (strEQ(scriptname, "-")) |
| 3248 | dosearch = 0; |
| 3249 | if (dosearch) { /* Look in '.' first. */ |
| 3250 | const char *cur = scriptname; |
| 3251 | #ifdef SEARCH_EXTS |
| 3252 | if ((curext = strrchr(scriptname,'.'))) /* possible current ext */ |
| 3253 | while (ext[i]) |
| 3254 | if (strEQ(ext[i++],curext)) { |
| 3255 | extidx = -1; /* already has an ext */ |
| 3256 | break; |
| 3257 | } |
| 3258 | do { |
| 3259 | #endif |
| 3260 | DEBUG_p(PerlIO_printf(Perl_debug_log, |
| 3261 | "Looking for %s\n",cur)); |
| 3262 | if (PerlLIO_stat(cur,&PL_statbuf) >= 0 |
| 3263 | && !S_ISDIR(PL_statbuf.st_mode)) { |
| 3264 | dosearch = 0; |
| 3265 | scriptname = cur; |
| 3266 | #ifdef SEARCH_EXTS |
| 3267 | break; |
| 3268 | #endif |
| 3269 | } |
| 3270 | #ifdef SEARCH_EXTS |
| 3271 | if (cur == scriptname) { |
| 3272 | len = strlen(scriptname); |
| 3273 | if (len+MAX_EXT_LEN+1 >= sizeof(tmpbuf)) |
| 3274 | break; |
| 3275 | my_strlcpy(tmpbuf, scriptname, sizeof(tmpbuf)); |
| 3276 | cur = tmpbuf; |
| 3277 | } |
| 3278 | } while (extidx >= 0 && ext[extidx] /* try an extension? */ |
| 3279 | && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len)); |
| 3280 | #endif |
| 3281 | } |
| 3282 | #endif |
| 3283 | |
| 3284 | if (dosearch && !strchr(scriptname, '/') |
| 3285 | #ifdef DOSISH |
| 3286 | && !strchr(scriptname, '\\') |
| 3287 | #endif |
| 3288 | && (s = PerlEnv_getenv("PATH"))) |
| 3289 | { |
| 3290 | bool seen_dot = 0; |
| 3291 | |
| 3292 | bufend = s + strlen(s); |
| 3293 | while (s < bufend) { |
| 3294 | # ifdef DOSISH |
| 3295 | for (len = 0; *s |
| 3296 | && *s != ';'; len++, s++) { |
| 3297 | if (len < sizeof tmpbuf) |
| 3298 | tmpbuf[len] = *s; |
| 3299 | } |
| 3300 | if (len < sizeof tmpbuf) |
| 3301 | tmpbuf[len] = '\0'; |
| 3302 | # else |
| 3303 | s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf, s, bufend, |
| 3304 | ':', |
| 3305 | &len); |
| 3306 | # endif |
| 3307 | if (s < bufend) |
| 3308 | s++; |
| 3309 | if (len + 1 + strlen(scriptname) + MAX_EXT_LEN >= sizeof tmpbuf) |
| 3310 | continue; /* don't search dir with too-long name */ |
| 3311 | if (len |
| 3312 | # ifdef DOSISH |
| 3313 | && tmpbuf[len - 1] != '/' |
| 3314 | && tmpbuf[len - 1] != '\\' |
| 3315 | # endif |
| 3316 | ) |
| 3317 | tmpbuf[len++] = '/'; |
| 3318 | if (len == 2 && tmpbuf[0] == '.') |
| 3319 | seen_dot = 1; |
| 3320 | (void)my_strlcpy(tmpbuf + len, scriptname, sizeof(tmpbuf) - len); |
| 3321 | #endif /* !VMS */ |
| 3322 | |
| 3323 | #ifdef SEARCH_EXTS |
| 3324 | len = strlen(tmpbuf); |
| 3325 | if (extidx > 0) /* reset after previous loop */ |
| 3326 | extidx = 0; |
| 3327 | do { |
| 3328 | #endif |
| 3329 | DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tmpbuf)); |
| 3330 | retval = PerlLIO_stat(tmpbuf,&PL_statbuf); |
| 3331 | if (S_ISDIR(PL_statbuf.st_mode)) { |
| 3332 | retval = -1; |
| 3333 | } |
| 3334 | #ifdef SEARCH_EXTS |
| 3335 | } while ( retval < 0 /* not there */ |
| 3336 | && extidx>=0 && ext[extidx] /* try an extension? */ |
| 3337 | && my_strlcpy(tmpbuf+len, ext[extidx++], sizeof(tmpbuf) - len) |
| 3338 | ); |
| 3339 | #endif |
| 3340 | if (retval < 0) |
| 3341 | continue; |
| 3342 | if (S_ISREG(PL_statbuf.st_mode) |
| 3343 | && cando(S_IRUSR,TRUE,&PL_statbuf) |
| 3344 | #if !defined(DOSISH) |
| 3345 | && cando(S_IXUSR,TRUE,&PL_statbuf) |
| 3346 | #endif |
| 3347 | ) |
| 3348 | { |
| 3349 | xfound = tmpbuf; /* bingo! */ |
| 3350 | break; |
| 3351 | } |
| 3352 | if (!xfailed) |
| 3353 | xfailed = savepv(tmpbuf); |
| 3354 | } |
| 3355 | #ifndef DOSISH |
| 3356 | if (!xfound && !seen_dot && !xfailed && |
| 3357 | (PerlLIO_stat(scriptname,&PL_statbuf) < 0 |
| 3358 | || S_ISDIR(PL_statbuf.st_mode))) |
| 3359 | #endif |
| 3360 | seen_dot = 1; /* Disable message. */ |
| 3361 | if (!xfound) { |
| 3362 | if (flags & 1) { /* do or die? */ |
| 3363 | /* diag_listed_as: Can't execute %s */ |
| 3364 | Perl_croak(aTHX_ "Can't %s %s%s%s", |
| 3365 | (xfailed ? "execute" : "find"), |
| 3366 | (xfailed ? xfailed : scriptname), |
| 3367 | (xfailed ? "" : " on PATH"), |
| 3368 | (xfailed || seen_dot) ? "" : ", '.' not in PATH"); |
| 3369 | } |
| 3370 | scriptname = NULL; |
| 3371 | } |
| 3372 | Safefree(xfailed); |
| 3373 | scriptname = xfound; |
| 3374 | } |
| 3375 | return (scriptname ? savepv(scriptname) : NULL); |
| 3376 | } |
| 3377 | |
| 3378 | #ifndef PERL_GET_CONTEXT_DEFINED |
| 3379 | |
| 3380 | void * |
| 3381 | Perl_get_context(void) |
| 3382 | { |
| 3383 | #if defined(USE_ITHREADS) |
| 3384 | dVAR; |
| 3385 | # ifdef OLD_PTHREADS_API |
| 3386 | pthread_addr_t t; |
| 3387 | int error = pthread_getspecific(PL_thr_key, &t) |
| 3388 | if (error) |
| 3389 | Perl_croak_nocontext("panic: pthread_getspecific, error=%d", error); |
| 3390 | return (void*)t; |
| 3391 | # else |
| 3392 | # ifdef I_MACH_CTHREADS |
| 3393 | return (void*)cthread_data(cthread_self()); |
| 3394 | # else |
| 3395 | return (void*)PTHREAD_GETSPECIFIC(PL_thr_key); |
| 3396 | # endif |
| 3397 | # endif |
| 3398 | #else |
| 3399 | return (void*)NULL; |
| 3400 | #endif |
| 3401 | } |
| 3402 | |
| 3403 | void |
| 3404 | Perl_set_context(void *t) |
| 3405 | { |
| 3406 | #if defined(USE_ITHREADS) |
| 3407 | dVAR; |
| 3408 | #endif |
| 3409 | PERL_ARGS_ASSERT_SET_CONTEXT; |
| 3410 | #if defined(USE_ITHREADS) |
| 3411 | # ifdef I_MACH_CTHREADS |
| 3412 | cthread_set_data(cthread_self(), t); |
| 3413 | # else |
| 3414 | { |
| 3415 | const int error = pthread_setspecific(PL_thr_key, t); |
| 3416 | if (error) |
| 3417 | Perl_croak_nocontext("panic: pthread_setspecific, error=%d", error); |
| 3418 | } |
| 3419 | # endif |
| 3420 | #else |
| 3421 | PERL_UNUSED_ARG(t); |
| 3422 | #endif |
| 3423 | } |
| 3424 | |
| 3425 | #endif /* !PERL_GET_CONTEXT_DEFINED */ |
| 3426 | |
| 3427 | #if defined(PERL_GLOBAL_STRUCT) && !defined(PERL_GLOBAL_STRUCT_PRIVATE) |
| 3428 | struct perl_vars * |
| 3429 | Perl_GetVars(pTHX) |
| 3430 | { |
| 3431 | PERL_UNUSED_CONTEXT; |
| 3432 | return &PL_Vars; |
| 3433 | } |
| 3434 | #endif |
| 3435 | |
| 3436 | char ** |
| 3437 | Perl_get_op_names(pTHX) |
| 3438 | { |
| 3439 | PERL_UNUSED_CONTEXT; |
| 3440 | return (char **)PL_op_name; |
| 3441 | } |
| 3442 | |
| 3443 | char ** |
| 3444 | Perl_get_op_descs(pTHX) |
| 3445 | { |
| 3446 | PERL_UNUSED_CONTEXT; |
| 3447 | return (char **)PL_op_desc; |
| 3448 | } |
| 3449 | |
| 3450 | const char * |
| 3451 | Perl_get_no_modify(pTHX) |
| 3452 | { |
| 3453 | PERL_UNUSED_CONTEXT; |
| 3454 | return PL_no_modify; |
| 3455 | } |
| 3456 | |
| 3457 | U32 * |
| 3458 | Perl_get_opargs(pTHX) |
| 3459 | { |
| 3460 | PERL_UNUSED_CONTEXT; |
| 3461 | return (U32 *)PL_opargs; |
| 3462 | } |
| 3463 | |
| 3464 | PPADDR_t* |
| 3465 | Perl_get_ppaddr(pTHX) |
| 3466 | { |
| 3467 | dVAR; |
| 3468 | PERL_UNUSED_CONTEXT; |
| 3469 | return (PPADDR_t*)PL_ppaddr; |
| 3470 | } |
| 3471 | |
| 3472 | #ifndef HAS_GETENV_LEN |
| 3473 | char * |
| 3474 | Perl_getenv_len(pTHX_ const char *env_elem, unsigned long *len) |
| 3475 | { |
| 3476 | char * const env_trans = PerlEnv_getenv(env_elem); |
| 3477 | PERL_UNUSED_CONTEXT; |
| 3478 | PERL_ARGS_ASSERT_GETENV_LEN; |
| 3479 | if (env_trans) |
| 3480 | *len = strlen(env_trans); |
| 3481 | return env_trans; |
| 3482 | } |
| 3483 | #endif |
| 3484 | |
| 3485 | |
| 3486 | MGVTBL* |
| 3487 | Perl_get_vtbl(pTHX_ int vtbl_id) |
| 3488 | { |
| 3489 | PERL_UNUSED_CONTEXT; |
| 3490 | |
| 3491 | return (vtbl_id < 0 || vtbl_id >= magic_vtable_max) |
| 3492 | ? NULL : (MGVTBL*)PL_magic_vtables + vtbl_id; |
| 3493 | } |
| 3494 | |
| 3495 | I32 |
| 3496 | Perl_my_fflush_all(pTHX) |
| 3497 | { |
| 3498 | #if defined(USE_PERLIO) || defined(FFLUSH_NULL) |
| 3499 | return PerlIO_flush(NULL); |
| 3500 | #else |
| 3501 | # if defined(HAS__FWALK) |
| 3502 | extern int fflush(FILE *); |
| 3503 | /* undocumented, unprototyped, but very useful BSDism */ |
| 3504 | extern void _fwalk(int (*)(FILE *)); |
| 3505 | _fwalk(&fflush); |
| 3506 | return 0; |
| 3507 | # else |
| 3508 | # if defined(FFLUSH_ALL) && defined(HAS_STDIO_STREAM_ARRAY) |
| 3509 | long open_max = -1; |
| 3510 | # ifdef PERL_FFLUSH_ALL_FOPEN_MAX |
| 3511 | open_max = PERL_FFLUSH_ALL_FOPEN_MAX; |
| 3512 | # else |
| 3513 | # if defined(HAS_SYSCONF) && defined(_SC_OPEN_MAX) |
| 3514 | open_max = sysconf(_SC_OPEN_MAX); |
| 3515 | # else |
| 3516 | # ifdef FOPEN_MAX |
| 3517 | open_max = FOPEN_MAX; |
| 3518 | # else |
| 3519 | # ifdef OPEN_MAX |
| 3520 | open_max = OPEN_MAX; |
| 3521 | # else |
| 3522 | # ifdef _NFILE |
| 3523 | open_max = _NFILE; |
| 3524 | # endif |
| 3525 | # endif |
| 3526 | # endif |
| 3527 | # endif |
| 3528 | # endif |
| 3529 | if (open_max > 0) { |
| 3530 | long i; |
| 3531 | for (i = 0; i < open_max; i++) |
| 3532 | if (STDIO_STREAM_ARRAY[i]._file >= 0 && |
| 3533 | STDIO_STREAM_ARRAY[i]._file < open_max && |
| 3534 | STDIO_STREAM_ARRAY[i]._flag) |
| 3535 | PerlIO_flush(&STDIO_STREAM_ARRAY[i]); |
| 3536 | return 0; |
| 3537 | } |
| 3538 | # endif |
| 3539 | SETERRNO(EBADF,RMS_IFI); |
| 3540 | return EOF; |
| 3541 | # endif |
| 3542 | #endif |
| 3543 | } |
| 3544 | |
| 3545 | void |
| 3546 | Perl_report_wrongway_fh(pTHX_ const GV *gv, const char have) |
| 3547 | { |
| 3548 | if (ckWARN(WARN_IO)) { |
| 3549 | HEK * const name |
| 3550 | = gv && (isGV_with_GP(gv)) |
| 3551 | ? GvENAME_HEK((gv)) |
| 3552 | : NULL; |
| 3553 | const char * const direction = have == '>' ? "out" : "in"; |
| 3554 | |
| 3555 | if (name && HEK_LEN(name)) |
| 3556 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 3557 | "Filehandle %"HEKf" opened only for %sput", |
| 3558 | HEKfARG(name), direction); |
| 3559 | else |
| 3560 | Perl_warner(aTHX_ packWARN(WARN_IO), |
| 3561 | "Filehandle opened only for %sput", direction); |
| 3562 | } |
| 3563 | } |
| 3564 | |
| 3565 | void |
| 3566 | Perl_report_evil_fh(pTHX_ const GV *gv) |
| 3567 | { |
| 3568 | const IO *io = gv ? GvIO(gv) : NULL; |
| 3569 | const PERL_BITFIELD16 op = PL_op->op_type; |
| 3570 | const char *vile; |
| 3571 | I32 warn_type; |
| 3572 | |
| 3573 | if (io && IoTYPE(io) == IoTYPE_CLOSED) { |
| 3574 | vile = "closed"; |
| 3575 | warn_type = WARN_CLOSED; |
| 3576 | } |
| 3577 | else { |
| 3578 | vile = "unopened"; |
| 3579 | warn_type = WARN_UNOPENED; |
| 3580 | } |
| 3581 | |
| 3582 | if (ckWARN(warn_type)) { |
| 3583 | SV * const name |
| 3584 | = gv && isGV_with_GP(gv) && GvENAMELEN(gv) ? |
| 3585 | sv_2mortal(newSVhek(GvENAME_HEK(gv))) : NULL; |
| 3586 | const char * const pars = |
| 3587 | (const char *)(OP_IS_FILETEST(op) ? "" : "()"); |
| 3588 | const char * const func = |
| 3589 | (const char *) |
| 3590 | (op == OP_READLINE || op == OP_RCATLINE |
| 3591 | ? "readline" : /* "<HANDLE>" not nice */ |
| 3592 | op == OP_LEAVEWRITE ? "write" : /* "write exit" not nice */ |
| 3593 | PL_op_desc[op]); |
| 3594 | const char * const type = |
| 3595 | (const char *) |
| 3596 | (OP_IS_SOCKET(op) || (io && IoTYPE(io) == IoTYPE_SOCKET) |
| 3597 | ? "socket" : "filehandle"); |
| 3598 | const bool have_name = name && SvCUR(name); |
| 3599 | Perl_warner(aTHX_ packWARN(warn_type), |
| 3600 | "%s%s on %s %s%s%"SVf, func, pars, vile, type, |
| 3601 | have_name ? " " : "", |
| 3602 | SVfARG(have_name ? name : &PL_sv_no)); |
| 3603 | if (io && IoDIRP(io) && !(IoFLAGS(io) & IOf_FAKE_DIRP)) |
| 3604 | Perl_warner( |
| 3605 | aTHX_ packWARN(warn_type), |
| 3606 | "\t(Are you trying to call %s%s on dirhandle%s%"SVf"?)\n", |
| 3607 | func, pars, have_name ? " " : "", |
| 3608 | SVfARG(have_name ? name : &PL_sv_no) |
| 3609 | ); |
| 3610 | } |
| 3611 | } |
| 3612 | |
| 3613 | /* To workaround core dumps from the uninitialised tm_zone we get the |
| 3614 | * system to give us a reasonable struct to copy. This fix means that |
| 3615 | * strftime uses the tm_zone and tm_gmtoff values returned by |
| 3616 | * localtime(time()). That should give the desired result most of the |
| 3617 | * time. But probably not always! |
| 3618 | * |
| 3619 | * This does not address tzname aspects of NETaa14816. |
| 3620 | * |
| 3621 | */ |
| 3622 | |
| 3623 | #ifdef __GLIBC__ |
| 3624 | # ifndef STRUCT_TM_HASZONE |
| 3625 | # define STRUCT_TM_HASZONE |
| 3626 | # endif |
| 3627 | #endif |
| 3628 | |
| 3629 | #ifdef STRUCT_TM_HASZONE /* Backward compat */ |
| 3630 | # ifndef HAS_TM_TM_ZONE |
| 3631 | # define HAS_TM_TM_ZONE |
| 3632 | # endif |
| 3633 | #endif |
| 3634 | |
| 3635 | void |
| 3636 | Perl_init_tm(pTHX_ struct tm *ptm) /* see mktime, strftime and asctime */ |
| 3637 | { |
| 3638 | #ifdef HAS_TM_TM_ZONE |
| 3639 | Time_t now; |
| 3640 | const struct tm* my_tm; |
| 3641 | PERL_UNUSED_CONTEXT; |
| 3642 | PERL_ARGS_ASSERT_INIT_TM; |
| 3643 | (void)time(&now); |
| 3644 | my_tm = localtime(&now); |
| 3645 | if (my_tm) |
| 3646 | Copy(my_tm, ptm, 1, struct tm); |
| 3647 | #else |
| 3648 | PERL_UNUSED_CONTEXT; |
| 3649 | PERL_ARGS_ASSERT_INIT_TM; |
| 3650 | PERL_UNUSED_ARG(ptm); |
| 3651 | #endif |
| 3652 | } |
| 3653 | |
| 3654 | /* |
| 3655 | * mini_mktime - normalise struct tm values without the localtime() |
| 3656 | * semantics (and overhead) of mktime(). |
| 3657 | */ |
| 3658 | void |
| 3659 | Perl_mini_mktime(struct tm *ptm) |
| 3660 | { |
| 3661 | int yearday; |
| 3662 | int secs; |
| 3663 | int month, mday, year, jday; |
| 3664 | int odd_cent, odd_year; |
| 3665 | |
| 3666 | PERL_ARGS_ASSERT_MINI_MKTIME; |
| 3667 | |
| 3668 | #define DAYS_PER_YEAR 365 |
| 3669 | #define DAYS_PER_QYEAR (4*DAYS_PER_YEAR+1) |
| 3670 | #define DAYS_PER_CENT (25*DAYS_PER_QYEAR-1) |
| 3671 | #define DAYS_PER_QCENT (4*DAYS_PER_CENT+1) |
| 3672 | #define SECS_PER_HOUR (60*60) |
| 3673 | #define SECS_PER_DAY (24*SECS_PER_HOUR) |
| 3674 | /* parentheses deliberately absent on these two, otherwise they don't work */ |
| 3675 | #define MONTH_TO_DAYS 153/5 |
| 3676 | #define DAYS_TO_MONTH 5/153 |
| 3677 | /* offset to bias by March (month 4) 1st between month/mday & year finding */ |
| 3678 | #define YEAR_ADJUST (4*MONTH_TO_DAYS+1) |
| 3679 | /* as used here, the algorithm leaves Sunday as day 1 unless we adjust it */ |
| 3680 | #define WEEKDAY_BIAS 6 /* (1+6)%7 makes Sunday 0 again */ |
| 3681 | |
| 3682 | /* |
| 3683 | * Year/day algorithm notes: |
| 3684 | * |
| 3685 | * With a suitable offset for numeric value of the month, one can find |
| 3686 | * an offset into the year by considering months to have 30.6 (153/5) days, |
| 3687 | * using integer arithmetic (i.e., with truncation). To avoid too much |
| 3688 | * messing about with leap days, we consider January and February to be |
| 3689 | * the 13th and 14th month of the previous year. After that transformation, |
| 3690 | * we need the month index we use to be high by 1 from 'normal human' usage, |
| 3691 | * so the month index values we use run from 4 through 15. |
| 3692 | * |
| 3693 | * Given that, and the rules for the Gregorian calendar (leap years are those |
| 3694 | * divisible by 4 unless also divisible by 100, when they must be divisible |
| 3695 | * by 400 instead), we can simply calculate the number of days since some |
| 3696 | * arbitrary 'beginning of time' by futzing with the (adjusted) year number, |
| 3697 | * the days we derive from our month index, and adding in the day of the |
| 3698 | * month. The value used here is not adjusted for the actual origin which |
| 3699 | * it normally would use (1 January A.D. 1), since we're not exposing it. |
| 3700 | * We're only building the value so we can turn around and get the |
| 3701 | * normalised values for the year, month, day-of-month, and day-of-year. |
| 3702 | * |
| 3703 | * For going backward, we need to bias the value we're using so that we find |
| 3704 | * the right year value. (Basically, we don't want the contribution of |
| 3705 | * March 1st to the number to apply while deriving the year). Having done |
| 3706 | * that, we 'count up' the contribution to the year number by accounting for |
| 3707 | * full quadracenturies (400-year periods) with their extra leap days, plus |
| 3708 | * the contribution from full centuries (to avoid counting in the lost leap |
| 3709 | * days), plus the contribution from full quad-years (to count in the normal |
| 3710 | * leap days), plus the leftover contribution from any non-leap years. |
| 3711 | * At this point, if we were working with an actual leap day, we'll have 0 |
| 3712 | * days left over. This is also true for March 1st, however. So, we have |
| 3713 | * to special-case that result, and (earlier) keep track of the 'odd' |
| 3714 | * century and year contributions. If we got 4 extra centuries in a qcent, |
| 3715 | * or 4 extra years in a qyear, then it's a leap day and we call it 29 Feb. |
| 3716 | * Otherwise, we add back in the earlier bias we removed (the 123 from |
| 3717 | * figuring in March 1st), find the month index (integer division by 30.6), |
| 3718 | * and the remainder is the day-of-month. We then have to convert back to |
| 3719 | * 'real' months (including fixing January and February from being 14/15 in |
| 3720 | * the previous year to being in the proper year). After that, to get |
| 3721 | * tm_yday, we work with the normalised year and get a new yearday value for |
| 3722 | * January 1st, which we subtract from the yearday value we had earlier, |
| 3723 | * representing the date we've re-built. This is done from January 1 |
| 3724 | * because tm_yday is 0-origin. |
| 3725 | * |
| 3726 | * Since POSIX time routines are only guaranteed to work for times since the |
| 3727 | * UNIX epoch (00:00:00 1 Jan 1970 UTC), the fact that this algorithm |
| 3728 | * applies Gregorian calendar rules even to dates before the 16th century |
| 3729 | * doesn't bother me. Besides, you'd need cultural context for a given |
| 3730 | * date to know whether it was Julian or Gregorian calendar, and that's |
| 3731 | * outside the scope for this routine. Since we convert back based on the |
| 3732 | * same rules we used to build the yearday, you'll only get strange results |
| 3733 | * for input which needed normalising, or for the 'odd' century years which |
| 3734 | * were leap years in the Julian calendar but not in the Gregorian one. |
| 3735 | * I can live with that. |
| 3736 | * |
| 3737 | * This algorithm also fails to handle years before A.D. 1 gracefully, but |
| 3738 | * that's still outside the scope for POSIX time manipulation, so I don't |
| 3739 | * care. |
| 3740 | */ |
| 3741 | |
| 3742 | year = 1900 + ptm->tm_year; |
| 3743 | month = ptm->tm_mon; |
| 3744 | mday = ptm->tm_mday; |
| 3745 | jday = 0; |
| 3746 | if (month >= 2) |
| 3747 | month+=2; |
| 3748 | else |
| 3749 | month+=14, year--; |
| 3750 | yearday = DAYS_PER_YEAR * year + year/4 - year/100 + year/400; |
| 3751 | yearday += month*MONTH_TO_DAYS + mday + jday; |
| 3752 | /* |
| 3753 | * Note that we don't know when leap-seconds were or will be, |
| 3754 | * so we have to trust the user if we get something which looks |
| 3755 | * like a sensible leap-second. Wild values for seconds will |
| 3756 | * be rationalised, however. |
| 3757 | */ |
| 3758 | if ((unsigned) ptm->tm_sec <= 60) { |
| 3759 | secs = 0; |
| 3760 | } |
| 3761 | else { |
| 3762 | secs = ptm->tm_sec; |
| 3763 | ptm->tm_sec = 0; |
| 3764 | } |
| 3765 | secs += 60 * ptm->tm_min; |
| 3766 | secs += SECS_PER_HOUR * ptm->tm_hour; |
| 3767 | if (secs < 0) { |
| 3768 | if (secs-(secs/SECS_PER_DAY*SECS_PER_DAY) < 0) { |
| 3769 | /* got negative remainder, but need positive time */ |
| 3770 | /* back off an extra day to compensate */ |
| 3771 | yearday += (secs/SECS_PER_DAY)-1; |
| 3772 | secs -= SECS_PER_DAY * (secs/SECS_PER_DAY - 1); |
| 3773 | } |
| 3774 | else { |
| 3775 | yearday += (secs/SECS_PER_DAY); |
| 3776 | secs -= SECS_PER_DAY * (secs/SECS_PER_DAY); |
| 3777 | } |
| 3778 | } |
| 3779 | else if (secs >= SECS_PER_DAY) { |
| 3780 | yearday += (secs/SECS_PER_DAY); |
| 3781 | secs %= SECS_PER_DAY; |
| 3782 | } |
| 3783 | ptm->tm_hour = secs/SECS_PER_HOUR; |
| 3784 | secs %= SECS_PER_HOUR; |
| 3785 | ptm->tm_min = secs/60; |
| 3786 | secs %= 60; |
| 3787 | ptm->tm_sec += secs; |
| 3788 | /* done with time of day effects */ |
| 3789 | /* |
| 3790 | * The algorithm for yearday has (so far) left it high by 428. |
| 3791 | * To avoid mistaking a legitimate Feb 29 as Mar 1, we need to |
| 3792 | * bias it by 123 while trying to figure out what year it |
| 3793 | * really represents. Even with this tweak, the reverse |
| 3794 | * translation fails for years before A.D. 0001. |
| 3795 | * It would still fail for Feb 29, but we catch that one below. |
| 3796 | */ |
| 3797 | jday = yearday; /* save for later fixup vis-a-vis Jan 1 */ |
| 3798 | yearday -= YEAR_ADJUST; |
| 3799 | year = (yearday / DAYS_PER_QCENT) * 400; |
| 3800 | yearday %= DAYS_PER_QCENT; |
| 3801 | odd_cent = yearday / DAYS_PER_CENT; |
| 3802 | year += odd_cent * 100; |
| 3803 | yearday %= DAYS_PER_CENT; |
| 3804 | year += (yearday / DAYS_PER_QYEAR) * 4; |
| 3805 | yearday %= DAYS_PER_QYEAR; |
| 3806 | odd_year = yearday / DAYS_PER_YEAR; |
| 3807 | year += odd_year; |
| 3808 | yearday %= DAYS_PER_YEAR; |
| 3809 | if (!yearday && (odd_cent==4 || odd_year==4)) { /* catch Feb 29 */ |
| 3810 | month = 1; |
| 3811 | yearday = 29; |
| 3812 | } |
| 3813 | else { |
| 3814 | yearday += YEAR_ADJUST; /* recover March 1st crock */ |
| 3815 | month = yearday*DAYS_TO_MONTH; |
| 3816 | yearday -= month*MONTH_TO_DAYS; |
| 3817 | /* recover other leap-year adjustment */ |
| 3818 | if (month > 13) { |
| 3819 | month-=14; |
| 3820 | year++; |
| 3821 | } |
| 3822 | else { |
| 3823 | month-=2; |
| 3824 | } |
| 3825 | } |
| 3826 | ptm->tm_year = year - 1900; |
| 3827 | if (yearday) { |
| 3828 | ptm->tm_mday = yearday; |
| 3829 | ptm->tm_mon = month; |
| 3830 | } |
| 3831 | else { |
| 3832 | ptm->tm_mday = 31; |
| 3833 | ptm->tm_mon = month - 1; |
| 3834 | } |
| 3835 | /* re-build yearday based on Jan 1 to get tm_yday */ |
| 3836 | year--; |
| 3837 | yearday = year*DAYS_PER_YEAR + year/4 - year/100 + year/400; |
| 3838 | yearday += 14*MONTH_TO_DAYS + 1; |
| 3839 | ptm->tm_yday = jday - yearday; |
| 3840 | ptm->tm_wday = (jday + WEEKDAY_BIAS) % 7; |
| 3841 | } |
| 3842 | |
| 3843 | char * |
| 3844 | Perl_my_strftime(pTHX_ const char *fmt, int sec, int min, int hour, int mday, int mon, int year, int wday, int yday, int isdst) |
| 3845 | { |
| 3846 | #ifdef HAS_STRFTIME |
| 3847 | |
| 3848 | /* Note that yday and wday effectively are ignored by this function, as mini_mktime() overwrites them */ |
| 3849 | |
| 3850 | char *buf; |
| 3851 | int buflen; |
| 3852 | struct tm mytm; |
| 3853 | int len; |
| 3854 | |
| 3855 | PERL_ARGS_ASSERT_MY_STRFTIME; |
| 3856 | |
| 3857 | init_tm(&mytm); /* XXX workaround - see init_tm() above */ |
| 3858 | mytm.tm_sec = sec; |
| 3859 | mytm.tm_min = min; |
| 3860 | mytm.tm_hour = hour; |
| 3861 | mytm.tm_mday = mday; |
| 3862 | mytm.tm_mon = mon; |
| 3863 | mytm.tm_year = year; |
| 3864 | mytm.tm_wday = wday; |
| 3865 | mytm.tm_yday = yday; |
| 3866 | mytm.tm_isdst = isdst; |
| 3867 | mini_mktime(&mytm); |
| 3868 | /* use libc to get the values for tm_gmtoff and tm_zone [perl #18238] */ |
| 3869 | #if defined(HAS_MKTIME) && (defined(HAS_TM_TM_GMTOFF) || defined(HAS_TM_TM_ZONE)) |
| 3870 | STMT_START { |
| 3871 | struct tm mytm2; |
| 3872 | mytm2 = mytm; |
| 3873 | mktime(&mytm2); |
| 3874 | #ifdef HAS_TM_TM_GMTOFF |
| 3875 | mytm.tm_gmtoff = mytm2.tm_gmtoff; |
| 3876 | #endif |
| 3877 | #ifdef HAS_TM_TM_ZONE |
| 3878 | mytm.tm_zone = mytm2.tm_zone; |
| 3879 | #endif |
| 3880 | } STMT_END; |
| 3881 | #endif |
| 3882 | buflen = 64; |
| 3883 | Newx(buf, buflen, char); |
| 3884 | |
| 3885 | GCC_DIAG_IGNORE(-Wformat-nonliteral); /* fmt checked by caller */ |
| 3886 | len = strftime(buf, buflen, fmt, &mytm); |
| 3887 | GCC_DIAG_RESTORE; |
| 3888 | |
| 3889 | /* |
| 3890 | ** The following is needed to handle to the situation where |
| 3891 | ** tmpbuf overflows. Basically we want to allocate a buffer |
| 3892 | ** and try repeatedly. The reason why it is so complicated |
| 3893 | ** is that getting a return value of 0 from strftime can indicate |
| 3894 | ** one of the following: |
| 3895 | ** 1. buffer overflowed, |
| 3896 | ** 2. illegal conversion specifier, or |
| 3897 | ** 3. the format string specifies nothing to be returned(not |
| 3898 | ** an error). This could be because format is an empty string |
| 3899 | ** or it specifies %p that yields an empty string in some locale. |
| 3900 | ** If there is a better way to make it portable, go ahead by |
| 3901 | ** all means. |
| 3902 | */ |
| 3903 | if ((len > 0 && len < buflen) || (len == 0 && *fmt == '\0')) |
| 3904 | return buf; |
| 3905 | else { |
| 3906 | /* Possibly buf overflowed - try again with a bigger buf */ |
| 3907 | const int fmtlen = strlen(fmt); |
| 3908 | int bufsize = fmtlen + buflen; |
| 3909 | |
| 3910 | Renew(buf, bufsize, char); |
| 3911 | while (buf) { |
| 3912 | |
| 3913 | GCC_DIAG_IGNORE(-Wformat-nonliteral); /* fmt checked by caller */ |
| 3914 | buflen = strftime(buf, bufsize, fmt, &mytm); |
| 3915 | GCC_DIAG_RESTORE; |
| 3916 | |
| 3917 | if (buflen > 0 && buflen < bufsize) |
| 3918 | break; |
| 3919 | /* heuristic to prevent out-of-memory errors */ |
| 3920 | if (bufsize > 100*fmtlen) { |
| 3921 | Safefree(buf); |
| 3922 | buf = NULL; |
| 3923 | break; |
| 3924 | } |
| 3925 | bufsize *= 2; |
| 3926 | Renew(buf, bufsize, char); |
| 3927 | } |
| 3928 | return buf; |
| 3929 | } |
| 3930 | #else |
| 3931 | Perl_croak(aTHX_ "panic: no strftime"); |
| 3932 | return NULL; |
| 3933 | #endif |
| 3934 | } |
| 3935 | |
| 3936 | |
| 3937 | #define SV_CWD_RETURN_UNDEF \ |
| 3938 | sv_setsv(sv, &PL_sv_undef); \ |
| 3939 | return FALSE |
| 3940 | |
| 3941 | #define SV_CWD_ISDOT(dp) \ |
| 3942 | (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \ |
| 3943 | (dp->d_name[1] == '.' && dp->d_name[2] == '\0'))) |
| 3944 | |
| 3945 | /* |
| 3946 | =head1 Miscellaneous Functions |
| 3947 | |
| 3948 | =for apidoc getcwd_sv |
| 3949 | |
| 3950 | Fill the sv with current working directory |
| 3951 | |
| 3952 | =cut |
| 3953 | */ |
| 3954 | |
| 3955 | /* Originally written in Perl by John Bazik; rewritten in C by Ben Sugars. |
| 3956 | * rewritten again by dougm, optimized for use with xs TARG, and to prefer |
| 3957 | * getcwd(3) if available |
| 3958 | * Comments from the original: |
| 3959 | * This is a faster version of getcwd. It's also more dangerous |
| 3960 | * because you might chdir out of a directory that you can't chdir |
| 3961 | * back into. */ |
| 3962 | |
| 3963 | int |
| 3964 | Perl_getcwd_sv(pTHX_ SV *sv) |
| 3965 | { |
| 3966 | #ifndef PERL_MICRO |
| 3967 | SvTAINTED_on(sv); |
| 3968 | |
| 3969 | PERL_ARGS_ASSERT_GETCWD_SV; |
| 3970 | |
| 3971 | #ifdef HAS_GETCWD |
| 3972 | { |
| 3973 | char buf[MAXPATHLEN]; |
| 3974 | |
| 3975 | /* Some getcwd()s automatically allocate a buffer of the given |
| 3976 | * size from the heap if they are given a NULL buffer pointer. |
| 3977 | * The problem is that this behaviour is not portable. */ |
| 3978 | if (getcwd(buf, sizeof(buf) - 1)) { |
| 3979 | sv_setpv(sv, buf); |
| 3980 | return TRUE; |
| 3981 | } |
| 3982 | else { |
| 3983 | sv_setsv(sv, &PL_sv_undef); |
| 3984 | return FALSE; |
| 3985 | } |
| 3986 | } |
| 3987 | |
| 3988 | #else |
| 3989 | |
| 3990 | Stat_t statbuf; |
| 3991 | int orig_cdev, orig_cino, cdev, cino, odev, oino, tdev, tino; |
| 3992 | int pathlen=0; |
| 3993 | Direntry_t *dp; |
| 3994 | |
| 3995 | SvUPGRADE(sv, SVt_PV); |
| 3996 | |
| 3997 | if (PerlLIO_lstat(".", &statbuf) < 0) { |
| 3998 | SV_CWD_RETURN_UNDEF; |
| 3999 | } |
| 4000 | |
| 4001 | orig_cdev = statbuf.st_dev; |
| 4002 | orig_cino = statbuf.st_ino; |
| 4003 | cdev = orig_cdev; |
| 4004 | cino = orig_cino; |
| 4005 | |
| 4006 | for (;;) { |
| 4007 | DIR *dir; |
| 4008 | int namelen; |
| 4009 | odev = cdev; |
| 4010 | oino = cino; |
| 4011 | |
| 4012 | if (PerlDir_chdir("..") < 0) { |
| 4013 | SV_CWD_RETURN_UNDEF; |
| 4014 | } |
| 4015 | if (PerlLIO_stat(".", &statbuf) < 0) { |
| 4016 | SV_CWD_RETURN_UNDEF; |
| 4017 | } |
| 4018 | |
| 4019 | cdev = statbuf.st_dev; |
| 4020 | cino = statbuf.st_ino; |
| 4021 | |
| 4022 | if (odev == cdev && oino == cino) { |
| 4023 | break; |
| 4024 | } |
| 4025 | if (!(dir = PerlDir_open("."))) { |
| 4026 | SV_CWD_RETURN_UNDEF; |
| 4027 | } |
| 4028 | |
| 4029 | while ((dp = PerlDir_read(dir)) != NULL) { |
| 4030 | #ifdef DIRNAMLEN |
| 4031 | namelen = dp->d_namlen; |
| 4032 | #else |
| 4033 | namelen = strlen(dp->d_name); |
| 4034 | #endif |
| 4035 | /* skip . and .. */ |
| 4036 | if (SV_CWD_ISDOT(dp)) { |
| 4037 | continue; |
| 4038 | } |
| 4039 | |
| 4040 | if (PerlLIO_lstat(dp->d_name, &statbuf) < 0) { |
| 4041 | SV_CWD_RETURN_UNDEF; |
| 4042 | } |
| 4043 | |
| 4044 | tdev = statbuf.st_dev; |
| 4045 | tino = statbuf.st_ino; |
| 4046 | if (tino == oino && tdev == odev) { |
| 4047 | break; |
| 4048 | } |
| 4049 | } |
| 4050 | |
| 4051 | if (!dp) { |
| 4052 | SV_CWD_RETURN_UNDEF; |
| 4053 | } |
| 4054 | |
| 4055 | if (pathlen + namelen + 1 >= MAXPATHLEN) { |
| 4056 | SV_CWD_RETURN_UNDEF; |
| 4057 | } |
| 4058 | |
| 4059 | SvGROW(sv, pathlen + namelen + 1); |
| 4060 | |
| 4061 | if (pathlen) { |
| 4062 | /* shift down */ |
| 4063 | Move(SvPVX_const(sv), SvPVX(sv) + namelen + 1, pathlen, char); |
| 4064 | } |
| 4065 | |
| 4066 | /* prepend current directory to the front */ |
| 4067 | *SvPVX(sv) = '/'; |
| 4068 | Move(dp->d_name, SvPVX(sv)+1, namelen, char); |
| 4069 | pathlen += (namelen + 1); |
| 4070 | |
| 4071 | #ifdef VOID_CLOSEDIR |
| 4072 | PerlDir_close(dir); |
| 4073 | #else |
| 4074 | if (PerlDir_close(dir) < 0) { |
| 4075 | SV_CWD_RETURN_UNDEF; |
| 4076 | } |
| 4077 | #endif |
| 4078 | } |
| 4079 | |
| 4080 | if (pathlen) { |
| 4081 | SvCUR_set(sv, pathlen); |
| 4082 | *SvEND(sv) = '\0'; |
| 4083 | SvPOK_only(sv); |
| 4084 | |
| 4085 | if (PerlDir_chdir(SvPVX_const(sv)) < 0) { |
| 4086 | SV_CWD_RETURN_UNDEF; |
| 4087 | } |
| 4088 | } |
| 4089 | if (PerlLIO_stat(".", &statbuf) < 0) { |
| 4090 | SV_CWD_RETURN_UNDEF; |
| 4091 | } |
| 4092 | |
| 4093 | cdev = statbuf.st_dev; |
| 4094 | cino = statbuf.st_ino; |
| 4095 | |
| 4096 | if (cdev != orig_cdev || cino != orig_cino) { |
| 4097 | Perl_croak(aTHX_ "Unstable directory path, " |
| 4098 | "current directory changed unexpectedly"); |
| 4099 | } |
| 4100 | |
| 4101 | return TRUE; |
| 4102 | #endif |
| 4103 | |
| 4104 | #else |
| 4105 | return FALSE; |
| 4106 | #endif |
| 4107 | } |
| 4108 | |
| 4109 | #include "vutil.c" |
| 4110 | |
| 4111 | #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) && defined(SOCK_DGRAM) && defined(HAS_SELECT) |
| 4112 | # define EMULATE_SOCKETPAIR_UDP |
| 4113 | #endif |
| 4114 | |
| 4115 | #ifdef EMULATE_SOCKETPAIR_UDP |
| 4116 | static int |
| 4117 | S_socketpair_udp (int fd[2]) { |
| 4118 | dTHX; |
| 4119 | /* Fake a datagram socketpair using UDP to localhost. */ |
| 4120 | int sockets[2] = {-1, -1}; |
| 4121 | struct sockaddr_in addresses[2]; |
| 4122 | int i; |
| 4123 | Sock_size_t size = sizeof(struct sockaddr_in); |
| 4124 | unsigned short port; |
| 4125 | int got; |
| 4126 | |
| 4127 | memset(&addresses, 0, sizeof(addresses)); |
| 4128 | i = 1; |
| 4129 | do { |
| 4130 | sockets[i] = PerlSock_socket(AF_INET, SOCK_DGRAM, PF_INET); |
| 4131 | if (sockets[i] == -1) |
| 4132 | goto tidy_up_and_fail; |
| 4133 | |
| 4134 | addresses[i].sin_family = AF_INET; |
| 4135 | addresses[i].sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 4136 | addresses[i].sin_port = 0; /* kernel choses port. */ |
| 4137 | if (PerlSock_bind(sockets[i], (struct sockaddr *) &addresses[i], |
| 4138 | sizeof(struct sockaddr_in)) == -1) |
| 4139 | goto tidy_up_and_fail; |
| 4140 | } while (i--); |
| 4141 | |
| 4142 | /* Now have 2 UDP sockets. Find out which port each is connected to, and |
| 4143 | for each connect the other socket to it. */ |
| 4144 | i = 1; |
| 4145 | do { |
| 4146 | if (PerlSock_getsockname(sockets[i], (struct sockaddr *) &addresses[i], |
| 4147 | &size) == -1) |
| 4148 | goto tidy_up_and_fail; |
| 4149 | if (size != sizeof(struct sockaddr_in)) |
| 4150 | goto abort_tidy_up_and_fail; |
| 4151 | /* !1 is 0, !0 is 1 */ |
| 4152 | if (PerlSock_connect(sockets[!i], (struct sockaddr *) &addresses[i], |
| 4153 | sizeof(struct sockaddr_in)) == -1) |
| 4154 | goto tidy_up_and_fail; |
| 4155 | } while (i--); |
| 4156 | |
| 4157 | /* Now we have 2 sockets connected to each other. I don't trust some other |
| 4158 | process not to have already sent a packet to us (by random) so send |
| 4159 | a packet from each to the other. */ |
| 4160 | i = 1; |
| 4161 | do { |
| 4162 | /* I'm going to send my own port number. As a short. |
| 4163 | (Who knows if someone somewhere has sin_port as a bitfield and needs |
| 4164 | this routine. (I'm assuming crays have socketpair)) */ |
| 4165 | port = addresses[i].sin_port; |
| 4166 | got = PerlLIO_write(sockets[i], &port, sizeof(port)); |
| 4167 | if (got != sizeof(port)) { |
| 4168 | if (got == -1) |
| 4169 | goto tidy_up_and_fail; |
| 4170 | goto abort_tidy_up_and_fail; |
| 4171 | } |
| 4172 | } while (i--); |
| 4173 | |
| 4174 | /* Packets sent. I don't trust them to have arrived though. |
| 4175 | (As I understand it Solaris TCP stack is multithreaded. Non-blocking |
| 4176 | connect to localhost will use a second kernel thread. In 2.6 the |
| 4177 | first thread running the connect() returns before the second completes, |
| 4178 | so EINPROGRESS> In 2.7 the improved stack is faster and connect() |
| 4179 | returns 0. Poor programs have tripped up. One poor program's authors' |
| 4180 | had a 50-1 reverse stock split. Not sure how connected these were.) |
| 4181 | So I don't trust someone not to have an unpredictable UDP stack. |
| 4182 | */ |
| 4183 | |
| 4184 | { |
| 4185 | struct timeval waitfor = {0, 100000}; /* You have 0.1 seconds */ |
| 4186 | int max = sockets[1] > sockets[0] ? sockets[1] : sockets[0]; |
| 4187 | fd_set rset; |
| 4188 | |
| 4189 | FD_ZERO(&rset); |
| 4190 | FD_SET((unsigned int)sockets[0], &rset); |
| 4191 | FD_SET((unsigned int)sockets[1], &rset); |
| 4192 | |
| 4193 | got = PerlSock_select(max + 1, &rset, NULL, NULL, &waitfor); |
| 4194 | if (got != 2 || !FD_ISSET(sockets[0], &rset) |
| 4195 | || !FD_ISSET(sockets[1], &rset)) { |
| 4196 | /* I hope this is portable and appropriate. */ |
| 4197 | if (got == -1) |
| 4198 | goto tidy_up_and_fail; |
| 4199 | goto abort_tidy_up_and_fail; |
| 4200 | } |
| 4201 | } |
| 4202 | |
| 4203 | /* And the paranoia department even now doesn't trust it to have arrive |
| 4204 | (hence MSG_DONTWAIT). Or that what arrives was sent by us. */ |
| 4205 | { |
| 4206 | struct sockaddr_in readfrom; |
| 4207 | unsigned short buffer[2]; |
| 4208 | |
| 4209 | i = 1; |
| 4210 | do { |
| 4211 | #ifdef MSG_DONTWAIT |
| 4212 | got = PerlSock_recvfrom(sockets[i], (char *) &buffer, |
| 4213 | sizeof(buffer), MSG_DONTWAIT, |
| 4214 | (struct sockaddr *) &readfrom, &size); |
| 4215 | #else |
| 4216 | got = PerlSock_recvfrom(sockets[i], (char *) &buffer, |
| 4217 | sizeof(buffer), 0, |
| 4218 | (struct sockaddr *) &readfrom, &size); |
| 4219 | #endif |
| 4220 | |
| 4221 | if (got == -1) |
| 4222 | goto tidy_up_and_fail; |
| 4223 | if (got != sizeof(port) |
| 4224 | || size != sizeof(struct sockaddr_in) |
| 4225 | /* Check other socket sent us its port. */ |
| 4226 | || buffer[0] != (unsigned short) addresses[!i].sin_port |
| 4227 | /* Check kernel says we got the datagram from that socket */ |
| 4228 | || readfrom.sin_family != addresses[!i].sin_family |
| 4229 | || readfrom.sin_addr.s_addr != addresses[!i].sin_addr.s_addr |
| 4230 | || readfrom.sin_port != addresses[!i].sin_port) |
| 4231 | goto abort_tidy_up_and_fail; |
| 4232 | } while (i--); |
| 4233 | } |
| 4234 | /* My caller (my_socketpair) has validated that this is non-NULL */ |
| 4235 | fd[0] = sockets[0]; |
| 4236 | fd[1] = sockets[1]; |
| 4237 | /* I hereby declare this connection open. May God bless all who cross |
| 4238 | her. */ |
| 4239 | return 0; |
| 4240 | |
| 4241 | abort_tidy_up_and_fail: |
| 4242 | errno = ECONNABORTED; |
| 4243 | tidy_up_and_fail: |
| 4244 | { |
| 4245 | dSAVE_ERRNO; |
| 4246 | if (sockets[0] != -1) |
| 4247 | PerlLIO_close(sockets[0]); |
| 4248 | if (sockets[1] != -1) |
| 4249 | PerlLIO_close(sockets[1]); |
| 4250 | RESTORE_ERRNO; |
| 4251 | return -1; |
| 4252 | } |
| 4253 | } |
| 4254 | #endif /* EMULATE_SOCKETPAIR_UDP */ |
| 4255 | |
| 4256 | #if !defined(HAS_SOCKETPAIR) && defined(HAS_SOCKET) && defined(AF_INET) && defined(PF_INET) |
| 4257 | int |
| 4258 | Perl_my_socketpair (int family, int type, int protocol, int fd[2]) { |
| 4259 | /* Stevens says that family must be AF_LOCAL, protocol 0. |
| 4260 | I'm going to enforce that, then ignore it, and use TCP (or UDP). */ |
| 4261 | dTHXa(NULL); |
| 4262 | int listener = -1; |
| 4263 | int connector = -1; |
| 4264 | int acceptor = -1; |
| 4265 | struct sockaddr_in listen_addr; |
| 4266 | struct sockaddr_in connect_addr; |
| 4267 | Sock_size_t size; |
| 4268 | |
| 4269 | if (protocol |
| 4270 | #ifdef AF_UNIX |
| 4271 | || family != AF_UNIX |
| 4272 | #endif |
| 4273 | ) { |
| 4274 | errno = EAFNOSUPPORT; |
| 4275 | return -1; |
| 4276 | } |
| 4277 | if (!fd) { |
| 4278 | errno = EINVAL; |
| 4279 | return -1; |
| 4280 | } |
| 4281 | |
| 4282 | #ifdef EMULATE_SOCKETPAIR_UDP |
| 4283 | if (type == SOCK_DGRAM) |
| 4284 | return S_socketpair_udp(fd); |
| 4285 | #endif |
| 4286 | |
| 4287 | aTHXa(PERL_GET_THX); |
| 4288 | listener = PerlSock_socket(AF_INET, type, 0); |
| 4289 | if (listener == -1) |
| 4290 | return -1; |
| 4291 | memset(&listen_addr, 0, sizeof(listen_addr)); |
| 4292 | listen_addr.sin_family = AF_INET; |
| 4293 | listen_addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK); |
| 4294 | listen_addr.sin_port = 0; /* kernel choses port. */ |
| 4295 | if (PerlSock_bind(listener, (struct sockaddr *) &listen_addr, |
| 4296 | sizeof(listen_addr)) == -1) |
| 4297 | goto tidy_up_and_fail; |
| 4298 | if (PerlSock_listen(listener, 1) == -1) |
| 4299 | goto tidy_up_and_fail; |
| 4300 | |
| 4301 | connector = PerlSock_socket(AF_INET, type, 0); |
| 4302 | if (connector == -1) |
| 4303 | goto tidy_up_and_fail; |
| 4304 | /* We want to find out the port number to connect to. */ |
| 4305 | size = sizeof(connect_addr); |
| 4306 | if (PerlSock_getsockname(listener, (struct sockaddr *) &connect_addr, |
| 4307 | &size) == -1) |
| 4308 | goto tidy_up_and_fail; |
| 4309 | if (size != sizeof(connect_addr)) |
| 4310 | goto abort_tidy_up_and_fail; |
| 4311 | if (PerlSock_connect(connector, (struct sockaddr *) &connect_addr, |
| 4312 | sizeof(connect_addr)) == -1) |
| 4313 | goto tidy_up_and_fail; |
| 4314 | |
| 4315 | size = sizeof(listen_addr); |
| 4316 | acceptor = PerlSock_accept(listener, (struct sockaddr *) &listen_addr, |
| 4317 | &size); |
| 4318 | if (acceptor == -1) |
| 4319 | goto tidy_up_and_fail; |
| 4320 | if (size != sizeof(listen_addr)) |
| 4321 | goto abort_tidy_up_and_fail; |
| 4322 | PerlLIO_close(listener); |
| 4323 | /* Now check we are talking to ourself by matching port and host on the |
| 4324 | two sockets. */ |
| 4325 | if (PerlSock_getsockname(connector, (struct sockaddr *) &connect_addr, |
| 4326 | &size) == -1) |
| 4327 | goto tidy_up_and_fail; |
| 4328 | if (size != sizeof(connect_addr) |
| 4329 | || listen_addr.sin_family != connect_addr.sin_family |
| 4330 | || listen_addr.sin_addr.s_addr != connect_addr.sin_addr.s_addr |
| 4331 | || listen_addr.sin_port != connect_addr.sin_port) { |
| 4332 | goto abort_tidy_up_and_fail; |
| 4333 | } |
| 4334 | fd[0] = connector; |
| 4335 | fd[1] = acceptor; |
| 4336 | return 0; |
| 4337 | |
| 4338 | abort_tidy_up_and_fail: |
| 4339 | #ifdef ECONNABORTED |
| 4340 | errno = ECONNABORTED; /* This would be the standard thing to do. */ |
| 4341 | #else |
| 4342 | # ifdef ECONNREFUSED |
| 4343 | errno = ECONNREFUSED; /* E.g. Symbian does not have ECONNABORTED. */ |
| 4344 | # else |
| 4345 | errno = ETIMEDOUT; /* Desperation time. */ |
| 4346 | # endif |
| 4347 | #endif |
| 4348 | tidy_up_and_fail: |
| 4349 | { |
| 4350 | dSAVE_ERRNO; |
| 4351 | if (listener != -1) |
| 4352 | PerlLIO_close(listener); |
| 4353 | if (connector != -1) |
| 4354 | PerlLIO_close(connector); |
| 4355 | if (acceptor != -1) |
| 4356 | PerlLIO_close(acceptor); |
| 4357 | RESTORE_ERRNO; |
| 4358 | return -1; |
| 4359 | } |
| 4360 | } |
| 4361 | #else |
| 4362 | /* In any case have a stub so that there's code corresponding |
| 4363 | * to the my_socketpair in embed.fnc. */ |
| 4364 | int |
| 4365 | Perl_my_socketpair (int family, int type, int protocol, int fd[2]) { |
| 4366 | #ifdef HAS_SOCKETPAIR |
| 4367 | return socketpair(family, type, protocol, fd); |
| 4368 | #else |
| 4369 | return -1; |
| 4370 | #endif |
| 4371 | } |
| 4372 | #endif |
| 4373 | |
| 4374 | /* |
| 4375 | |
| 4376 | =for apidoc sv_nosharing |
| 4377 | |
| 4378 | Dummy routine which "shares" an SV when there is no sharing module present. |
| 4379 | Or "locks" it. Or "unlocks" it. In other |
| 4380 | words, ignores its single SV argument. |
| 4381 | Exists to avoid test for a NULL function pointer and because it could |
| 4382 | potentially warn under some level of strict-ness. |
| 4383 | |
| 4384 | =cut |
| 4385 | */ |
| 4386 | |
| 4387 | void |
| 4388 | Perl_sv_nosharing(pTHX_ SV *sv) |
| 4389 | { |
| 4390 | PERL_UNUSED_CONTEXT; |
| 4391 | PERL_UNUSED_ARG(sv); |
| 4392 | } |
| 4393 | |
| 4394 | /* |
| 4395 | |
| 4396 | =for apidoc sv_destroyable |
| 4397 | |
| 4398 | Dummy routine which reports that object can be destroyed when there is no |
| 4399 | sharing module present. It ignores its single SV argument, and returns |
| 4400 | 'true'. Exists to avoid test for a NULL function pointer and because it |
| 4401 | could potentially warn under some level of strict-ness. |
| 4402 | |
| 4403 | =cut |
| 4404 | */ |
| 4405 | |
| 4406 | bool |
| 4407 | Perl_sv_destroyable(pTHX_ SV *sv) |
| 4408 | { |
| 4409 | PERL_UNUSED_CONTEXT; |
| 4410 | PERL_UNUSED_ARG(sv); |
| 4411 | return TRUE; |
| 4412 | } |
| 4413 | |
| 4414 | U32 |
| 4415 | Perl_parse_unicode_opts(pTHX_ const char **popt) |
| 4416 | { |
| 4417 | const char *p = *popt; |
| 4418 | U32 opt = 0; |
| 4419 | |
| 4420 | PERL_ARGS_ASSERT_PARSE_UNICODE_OPTS; |
| 4421 | |
| 4422 | if (*p) { |
| 4423 | if (isDIGIT(*p)) { |
| 4424 | const char* endptr; |
| 4425 | UV uv; |
| 4426 | if (grok_atoUV(p, &uv, &endptr) && uv <= U32_MAX) { |
| 4427 | opt = (U32)uv; |
| 4428 | p = endptr; |
| 4429 | if (p && *p && *p != '\n' && *p != '\r') { |
| 4430 | if (isSPACE(*p)) |
| 4431 | goto the_end_of_the_opts_parser; |
| 4432 | else |
| 4433 | Perl_croak(aTHX_ "Unknown Unicode option letter '%c'", *p); |
| 4434 | } |
| 4435 | } |
| 4436 | } |
| 4437 | else { |
| 4438 | for (; *p; p++) { |
| 4439 | switch (*p) { |
| 4440 | case PERL_UNICODE_STDIN: |
| 4441 | opt |= PERL_UNICODE_STDIN_FLAG; break; |
| 4442 | case PERL_UNICODE_STDOUT: |
| 4443 | opt |= PERL_UNICODE_STDOUT_FLAG; break; |
| 4444 | case PERL_UNICODE_STDERR: |
| 4445 | opt |= PERL_UNICODE_STDERR_FLAG; break; |
| 4446 | case PERL_UNICODE_STD: |
| 4447 | opt |= PERL_UNICODE_STD_FLAG; break; |
| 4448 | case PERL_UNICODE_IN: |
| 4449 | opt |= PERL_UNICODE_IN_FLAG; break; |
| 4450 | case PERL_UNICODE_OUT: |
| 4451 | opt |= PERL_UNICODE_OUT_FLAG; break; |
| 4452 | case PERL_UNICODE_INOUT: |
| 4453 | opt |= PERL_UNICODE_INOUT_FLAG; break; |
| 4454 | case PERL_UNICODE_LOCALE: |
| 4455 | opt |= PERL_UNICODE_LOCALE_FLAG; break; |
| 4456 | case PERL_UNICODE_ARGV: |
| 4457 | opt |= PERL_UNICODE_ARGV_FLAG; break; |
| 4458 | case PERL_UNICODE_UTF8CACHEASSERT: |
| 4459 | opt |= PERL_UNICODE_UTF8CACHEASSERT_FLAG; break; |
| 4460 | default: |
| 4461 | if (*p != '\n' && *p != '\r') { |
| 4462 | if(isSPACE(*p)) goto the_end_of_the_opts_parser; |
| 4463 | else |
| 4464 | Perl_croak(aTHX_ |
| 4465 | "Unknown Unicode option letter '%c'", *p); |
| 4466 | } |
| 4467 | } |
| 4468 | } |
| 4469 | } |
| 4470 | } |
| 4471 | else |
| 4472 | opt = PERL_UNICODE_DEFAULT_FLAGS; |
| 4473 | |
| 4474 | the_end_of_the_opts_parser: |
| 4475 | |
| 4476 | if (opt & ~PERL_UNICODE_ALL_FLAGS) |
| 4477 | Perl_croak(aTHX_ "Unknown Unicode option value %"UVuf, |
| 4478 | (UV) (opt & ~PERL_UNICODE_ALL_FLAGS)); |
| 4479 | |
| 4480 | *popt = p; |
| 4481 | |
| 4482 | return opt; |
| 4483 | } |
| 4484 | |
| 4485 | #ifdef VMS |
| 4486 | # include <starlet.h> |
| 4487 | #endif |
| 4488 | |
| 4489 | U32 |
| 4490 | Perl_seed(pTHX) |
| 4491 | { |
| 4492 | /* |
| 4493 | * This is really just a quick hack which grabs various garbage |
| 4494 | * values. It really should be a real hash algorithm which |
| 4495 | * spreads the effect of every input bit onto every output bit, |
| 4496 | * if someone who knows about such things would bother to write it. |
| 4497 | * Might be a good idea to add that function to CORE as well. |
| 4498 | * No numbers below come from careful analysis or anything here, |
| 4499 | * except they are primes and SEED_C1 > 1E6 to get a full-width |
| 4500 | * value from (tv_sec * SEED_C1 + tv_usec). The multipliers should |
| 4501 | * probably be bigger too. |
| 4502 | */ |
| 4503 | #if RANDBITS > 16 |
| 4504 | # define SEED_C1 1000003 |
| 4505 | #define SEED_C4 73819 |
| 4506 | #else |
| 4507 | # define SEED_C1 25747 |
| 4508 | #define SEED_C4 20639 |
| 4509 | #endif |
| 4510 | #define SEED_C2 3 |
| 4511 | #define SEED_C3 269 |
| 4512 | #define SEED_C5 26107 |
| 4513 | |
| 4514 | #ifndef PERL_NO_DEV_RANDOM |
| 4515 | int fd; |
| 4516 | #endif |
| 4517 | U32 u; |
| 4518 | #ifdef HAS_GETTIMEOFDAY |
| 4519 | struct timeval when; |
| 4520 | #else |
| 4521 | Time_t when; |
| 4522 | #endif |
| 4523 | |
| 4524 | /* This test is an escape hatch, this symbol isn't set by Configure. */ |
| 4525 | #ifndef PERL_NO_DEV_RANDOM |
| 4526 | #ifndef PERL_RANDOM_DEVICE |
| 4527 | /* /dev/random isn't used by default because reads from it will block |
| 4528 | * if there isn't enough entropy available. You can compile with |
| 4529 | * PERL_RANDOM_DEVICE to it if you'd prefer Perl to block until there |
| 4530 | * is enough real entropy to fill the seed. */ |
| 4531 | # define PERL_RANDOM_DEVICE "/dev/urandom" |
| 4532 | #endif |
| 4533 | fd = PerlLIO_open(PERL_RANDOM_DEVICE, 0); |
| 4534 | if (fd != -1) { |
| 4535 | if (PerlLIO_read(fd, (void*)&u, sizeof u) != sizeof u) |
| 4536 | u = 0; |
| 4537 | PerlLIO_close(fd); |
| 4538 | if (u) |
| 4539 | return u; |
| 4540 | } |
| 4541 | #endif |
| 4542 | |
| 4543 | #ifdef HAS_GETTIMEOFDAY |
| 4544 | PerlProc_gettimeofday(&when,NULL); |
| 4545 | u = (U32)SEED_C1 * when.tv_sec + (U32)SEED_C2 * when.tv_usec; |
| 4546 | #else |
| 4547 | (void)time(&when); |
| 4548 | u = (U32)SEED_C1 * when; |
| 4549 | #endif |
| 4550 | u += SEED_C3 * (U32)PerlProc_getpid(); |
| 4551 | u += SEED_C4 * (U32)PTR2UV(PL_stack_sp); |
| 4552 | #ifndef PLAN9 /* XXX Plan9 assembler chokes on this; fix needed */ |
| 4553 | u += SEED_C5 * (U32)PTR2UV(&when); |
| 4554 | #endif |
| 4555 | return u; |
| 4556 | } |
| 4557 | |
| 4558 | void |
| 4559 | Perl_get_hash_seed(pTHX_ unsigned char * const seed_buffer) |
| 4560 | { |
| 4561 | const char *env_pv; |
| 4562 | unsigned long i; |
| 4563 | |
| 4564 | PERL_ARGS_ASSERT_GET_HASH_SEED; |
| 4565 | |
| 4566 | env_pv= PerlEnv_getenv("PERL_HASH_SEED"); |
| 4567 | |
| 4568 | if ( env_pv ) |
| 4569 | #ifndef USE_HASH_SEED_EXPLICIT |
| 4570 | { |
| 4571 | /* ignore leading spaces */ |
| 4572 | while (isSPACE(*env_pv)) |
| 4573 | env_pv++; |
| 4574 | #ifdef USE_PERL_PERTURB_KEYS |
| 4575 | /* if they set it to "0" we disable key traversal randomization completely */ |
| 4576 | if (strEQ(env_pv,"0")) { |
| 4577 | PL_hash_rand_bits_enabled= 0; |
| 4578 | } else { |
| 4579 | /* otherwise switch to deterministic mode */ |
| 4580 | PL_hash_rand_bits_enabled= 2; |
| 4581 | } |
| 4582 | #endif |
| 4583 | /* ignore a leading 0x... if it is there */ |
| 4584 | if (env_pv[0] == '0' && env_pv[1] == 'x') |
| 4585 | env_pv += 2; |
| 4586 | |
| 4587 | for( i = 0; isXDIGIT(*env_pv) && i < PERL_HASH_SEED_BYTES; i++ ) { |
| 4588 | seed_buffer[i] = READ_XDIGIT(env_pv) << 4; |
| 4589 | if ( isXDIGIT(*env_pv)) { |
| 4590 | seed_buffer[i] |= READ_XDIGIT(env_pv); |
| 4591 | } |
| 4592 | } |
| 4593 | while (isSPACE(*env_pv)) |
| 4594 | env_pv++; |
| 4595 | |
| 4596 | if (*env_pv && !isXDIGIT(*env_pv)) { |
| 4597 | Perl_warn(aTHX_ "perl: warning: Non hex character in '$ENV{PERL_HASH_SEED}', seed only partially set\n"); |
| 4598 | } |
| 4599 | /* should we check for unparsed crap? */ |
| 4600 | /* should we warn about unused hex? */ |
| 4601 | /* should we warn about insufficient hex? */ |
| 4602 | } |
| 4603 | else |
| 4604 | #endif |
| 4605 | { |
| 4606 | (void)seedDrand01((Rand_seed_t)seed()); |
| 4607 | |
| 4608 | for( i = 0; i < PERL_HASH_SEED_BYTES; i++ ) { |
| 4609 | seed_buffer[i] = (unsigned char)(Drand01() * (U8_MAX+1)); |
| 4610 | } |
| 4611 | } |
| 4612 | #ifdef USE_PERL_PERTURB_KEYS |
| 4613 | { /* initialize PL_hash_rand_bits from the hash seed. |
| 4614 | * This value is highly volatile, it is updated every |
| 4615 | * hash insert, and is used as part of hash bucket chain |
| 4616 | * randomization and hash iterator randomization. */ |
| 4617 | PL_hash_rand_bits= 0xbe49d17f; /* I just picked a number */ |
| 4618 | for( i = 0; i < sizeof(UV) ; i++ ) { |
| 4619 | PL_hash_rand_bits += seed_buffer[i % PERL_HASH_SEED_BYTES]; |
| 4620 | PL_hash_rand_bits = ROTL_UV(PL_hash_rand_bits,8); |
| 4621 | } |
| 4622 | } |
| 4623 | env_pv= PerlEnv_getenv("PERL_PERTURB_KEYS"); |
| 4624 | if (env_pv) { |
| 4625 | if (strEQ(env_pv,"0") || strEQ(env_pv,"NO")) { |
| 4626 | PL_hash_rand_bits_enabled= 0; |
| 4627 | } else if (strEQ(env_pv,"1") || strEQ(env_pv,"RANDOM")) { |
| 4628 | PL_hash_rand_bits_enabled= 1; |
| 4629 | } else if (strEQ(env_pv,"2") || strEQ(env_pv,"DETERMINISTIC")) { |
| 4630 | PL_hash_rand_bits_enabled= 2; |
| 4631 | } else { |
| 4632 | Perl_warn(aTHX_ "perl: warning: strange setting in '$ENV{PERL_PERTURB_KEYS}': '%s'\n", env_pv); |
| 4633 | } |
| 4634 | } |
| 4635 | #endif |
| 4636 | } |
| 4637 | |
| 4638 | #ifdef PERL_GLOBAL_STRUCT |
| 4639 | |
| 4640 | #define PERL_GLOBAL_STRUCT_INIT |
| 4641 | #include "opcode.h" /* the ppaddr and check */ |
| 4642 | |
| 4643 | struct perl_vars * |
| 4644 | Perl_init_global_struct(pTHX) |
| 4645 | { |
| 4646 | struct perl_vars *plvarsp = NULL; |
| 4647 | # ifdef PERL_GLOBAL_STRUCT |
| 4648 | const IV nppaddr = C_ARRAY_LENGTH(Gppaddr); |
| 4649 | const IV ncheck = C_ARRAY_LENGTH(Gcheck); |
| 4650 | PERL_UNUSED_CONTEXT; |
| 4651 | # ifdef PERL_GLOBAL_STRUCT_PRIVATE |
| 4652 | /* PerlMem_malloc() because can't use even safesysmalloc() this early. */ |
| 4653 | plvarsp = (struct perl_vars*)PerlMem_malloc(sizeof(struct perl_vars)); |
| 4654 | if (!plvarsp) |
| 4655 | exit(1); |
| 4656 | # else |
| 4657 | plvarsp = PL_VarsPtr; |
| 4658 | # endif /* PERL_GLOBAL_STRUCT_PRIVATE */ |
| 4659 | # undef PERLVAR |
| 4660 | # undef PERLVARA |
| 4661 | # undef PERLVARI |
| 4662 | # undef PERLVARIC |
| 4663 | # define PERLVAR(prefix,var,type) /**/ |
| 4664 | # define PERLVARA(prefix,var,n,type) /**/ |
| 4665 | # define PERLVARI(prefix,var,type,init) plvarsp->prefix##var = init; |
| 4666 | # define PERLVARIC(prefix,var,type,init) plvarsp->prefix##var = init; |
| 4667 | # include "perlvars.h" |
| 4668 | # undef PERLVAR |
| 4669 | # undef PERLVARA |
| 4670 | # undef PERLVARI |
| 4671 | # undef PERLVARIC |
| 4672 | # ifdef PERL_GLOBAL_STRUCT |
| 4673 | plvarsp->Gppaddr = |
| 4674 | (Perl_ppaddr_t*) |
| 4675 | PerlMem_malloc(nppaddr * sizeof(Perl_ppaddr_t)); |
| 4676 | if (!plvarsp->Gppaddr) |
| 4677 | exit(1); |
| 4678 | plvarsp->Gcheck = |
| 4679 | (Perl_check_t*) |
| 4680 | PerlMem_malloc(ncheck * sizeof(Perl_check_t)); |
| 4681 | if (!plvarsp->Gcheck) |
| 4682 | exit(1); |
| 4683 | Copy(Gppaddr, plvarsp->Gppaddr, nppaddr, Perl_ppaddr_t); |
| 4684 | Copy(Gcheck, plvarsp->Gcheck, ncheck, Perl_check_t); |
| 4685 | # endif |
| 4686 | # ifdef PERL_SET_VARS |
| 4687 | PERL_SET_VARS(plvarsp); |
| 4688 | # endif |
| 4689 | # ifdef PERL_GLOBAL_STRUCT_PRIVATE |
| 4690 | plvarsp->Gsv_placeholder.sv_flags = 0; |
| 4691 | memset(plvarsp->Ghash_seed, 0, sizeof(plvarsp->Ghash_seed)); |
| 4692 | # endif |
| 4693 | # undef PERL_GLOBAL_STRUCT_INIT |
| 4694 | # endif |
| 4695 | return plvarsp; |
| 4696 | } |
| 4697 | |
| 4698 | #endif /* PERL_GLOBAL_STRUCT */ |
| 4699 | |
| 4700 | #ifdef PERL_GLOBAL_STRUCT |
| 4701 | |
| 4702 | void |
| 4703 | Perl_free_global_struct(pTHX_ struct perl_vars *plvarsp) |
| 4704 | { |
| 4705 | int veto = plvarsp->Gveto_cleanup; |
| 4706 | |
| 4707 | PERL_ARGS_ASSERT_FREE_GLOBAL_STRUCT; |
| 4708 | PERL_UNUSED_CONTEXT; |
| 4709 | # ifdef PERL_GLOBAL_STRUCT |
| 4710 | # ifdef PERL_UNSET_VARS |
| 4711 | PERL_UNSET_VARS(plvarsp); |
| 4712 | # endif |
| 4713 | if (veto) |
| 4714 | return; |
| 4715 | free(plvarsp->Gppaddr); |
| 4716 | free(plvarsp->Gcheck); |
| 4717 | # ifdef PERL_GLOBAL_STRUCT_PRIVATE |
| 4718 | free(plvarsp); |
| 4719 | # endif |
| 4720 | # endif |
| 4721 | } |
| 4722 | |
| 4723 | #endif /* PERL_GLOBAL_STRUCT */ |
| 4724 | |
| 4725 | #ifdef PERL_MEM_LOG |
| 4726 | |
| 4727 | /* -DPERL_MEM_LOG: the Perl_mem_log_..() is compiled, including |
| 4728 | * the default implementation, unless -DPERL_MEM_LOG_NOIMPL is also |
| 4729 | * given, and you supply your own implementation. |
| 4730 | * |
| 4731 | * The default implementation reads a single env var, PERL_MEM_LOG, |
| 4732 | * expecting one or more of the following: |
| 4733 | * |
| 4734 | * \d+ - fd fd to write to : must be 1st (grok_atoUV) |
| 4735 | * 'm' - memlog was PERL_MEM_LOG=1 |
| 4736 | * 's' - svlog was PERL_SV_LOG=1 |
| 4737 | * 't' - timestamp was PERL_MEM_LOG_TIMESTAMP=1 |
| 4738 | * |
| 4739 | * This makes the logger controllable enough that it can reasonably be |
| 4740 | * added to the system perl. |
| 4741 | */ |
| 4742 | |
| 4743 | /* -DPERL_MEM_LOG_SPRINTF_BUF_SIZE=X: size of a (stack-allocated) buffer |
| 4744 | * the Perl_mem_log_...() will use (either via sprintf or snprintf). |
| 4745 | */ |
| 4746 | #define PERL_MEM_LOG_SPRINTF_BUF_SIZE 128 |
| 4747 | |
| 4748 | /* -DPERL_MEM_LOG_FD=N: the file descriptor the Perl_mem_log_...() |
| 4749 | * writes to. In the default logger, this is settable at runtime. |
| 4750 | */ |
| 4751 | #ifndef PERL_MEM_LOG_FD |
| 4752 | # define PERL_MEM_LOG_FD 2 /* If STDERR is too boring for you. */ |
| 4753 | #endif |
| 4754 | |
| 4755 | #ifndef PERL_MEM_LOG_NOIMPL |
| 4756 | |
| 4757 | # ifdef DEBUG_LEAKING_SCALARS |
| 4758 | # define SV_LOG_SERIAL_FMT " [%lu]" |
| 4759 | # define _SV_LOG_SERIAL_ARG(sv) , (unsigned long) (sv)->sv_debug_serial |
| 4760 | # else |
| 4761 | # define SV_LOG_SERIAL_FMT |
| 4762 | # define _SV_LOG_SERIAL_ARG(sv) |
| 4763 | # endif |
| 4764 | |
| 4765 | static void |
| 4766 | S_mem_log_common(enum mem_log_type mlt, const UV n, |
| 4767 | const UV typesize, const char *type_name, const SV *sv, |
| 4768 | Malloc_t oldalloc, Malloc_t newalloc, |
| 4769 | const char *filename, const int linenumber, |
| 4770 | const char *funcname) |
| 4771 | { |
| 4772 | const char *pmlenv; |
| 4773 | |
| 4774 | PERL_ARGS_ASSERT_MEM_LOG_COMMON; |
| 4775 | |
| 4776 | pmlenv = PerlEnv_getenv("PERL_MEM_LOG"); |
| 4777 | if (!pmlenv) |
| 4778 | return; |
| 4779 | if (mlt < MLT_NEW_SV ? strchr(pmlenv,'m') : strchr(pmlenv,'s')) |
| 4780 | { |
| 4781 | /* We can't use SVs or PerlIO for obvious reasons, |
| 4782 | * so we'll use stdio and low-level IO instead. */ |
| 4783 | char buf[PERL_MEM_LOG_SPRINTF_BUF_SIZE]; |
| 4784 | |
| 4785 | # ifdef HAS_GETTIMEOFDAY |
| 4786 | # define MEM_LOG_TIME_FMT "%10d.%06d: " |
| 4787 | # define MEM_LOG_TIME_ARG (int)tv.tv_sec, (int)tv.tv_usec |
| 4788 | struct timeval tv; |
| 4789 | gettimeofday(&tv, 0); |
| 4790 | # else |
| 4791 | # define MEM_LOG_TIME_FMT "%10d: " |
| 4792 | # define MEM_LOG_TIME_ARG (int)when |
| 4793 | Time_t when; |
| 4794 | (void)time(&when); |
| 4795 | # endif |
| 4796 | /* If there are other OS specific ways of hires time than |
| 4797 | * gettimeofday() (see ext/Time-HiRes), the easiest way is |
| 4798 | * probably that they would be used to fill in the struct |
| 4799 | * timeval. */ |
| 4800 | { |
| 4801 | STRLEN len; |
| 4802 | const char* endptr; |
| 4803 | int fd; |
| 4804 | UV uv; |
| 4805 | if (grok_atoUV(pmlenv, &uv, &endptr) /* Ignore endptr. */ |
| 4806 | && uv && uv <= PERL_INT_MAX |
| 4807 | ) { |
| 4808 | fd = (int)uv; |
| 4809 | } else { |
| 4810 | fd = PERL_MEM_LOG_FD; |
| 4811 | } |
| 4812 | |
| 4813 | if (strchr(pmlenv, 't')) { |
| 4814 | len = my_snprintf(buf, sizeof(buf), |
| 4815 | MEM_LOG_TIME_FMT, MEM_LOG_TIME_ARG); |
| 4816 | PERL_UNUSED_RESULT(PerlLIO_write(fd, buf, len)); |
| 4817 | } |
| 4818 | switch (mlt) { |
| 4819 | case MLT_ALLOC: |
| 4820 | len = my_snprintf(buf, sizeof(buf), |
| 4821 | "alloc: %s:%d:%s: %"IVdf" %"UVuf |
| 4822 | " %s = %"IVdf": %"UVxf"\n", |
| 4823 | filename, linenumber, funcname, n, typesize, |
| 4824 | type_name, n * typesize, PTR2UV(newalloc)); |
| 4825 | break; |
| 4826 | case MLT_REALLOC: |
| 4827 | len = my_snprintf(buf, sizeof(buf), |
| 4828 | "realloc: %s:%d:%s: %"IVdf" %"UVuf |
| 4829 | " %s = %"IVdf": %"UVxf" -> %"UVxf"\n", |
| 4830 | filename, linenumber, funcname, n, typesize, |
| 4831 | type_name, n * typesize, PTR2UV(oldalloc), |
| 4832 | PTR2UV(newalloc)); |
| 4833 | break; |
| 4834 | case MLT_FREE: |
| 4835 | len = my_snprintf(buf, sizeof(buf), |
| 4836 | "free: %s:%d:%s: %"UVxf"\n", |
| 4837 | filename, linenumber, funcname, |
| 4838 | PTR2UV(oldalloc)); |
| 4839 | break; |
| 4840 | case MLT_NEW_SV: |
| 4841 | case MLT_DEL_SV: |
| 4842 | len = my_snprintf(buf, sizeof(buf), |
| 4843 | "%s_SV: %s:%d:%s: %"UVxf SV_LOG_SERIAL_FMT "\n", |
| 4844 | mlt == MLT_NEW_SV ? "new" : "del", |
| 4845 | filename, linenumber, funcname, |
| 4846 | PTR2UV(sv) _SV_LOG_SERIAL_ARG(sv)); |
| 4847 | break; |
| 4848 | default: |
| 4849 | len = 0; |
| 4850 | } |
| 4851 | PERL_UNUSED_RESULT(PerlLIO_write(fd, buf, len)); |
| 4852 | } |
| 4853 | } |
| 4854 | } |
| 4855 | #endif /* !PERL_MEM_LOG_NOIMPL */ |
| 4856 | |
| 4857 | #ifndef PERL_MEM_LOG_NOIMPL |
| 4858 | # define \ |
| 4859 | mem_log_common_if(alty, num, tysz, tynm, sv, oal, nal, flnm, ln, fnnm) \ |
| 4860 | mem_log_common (alty, num, tysz, tynm, sv, oal, nal, flnm, ln, fnnm) |
| 4861 | #else |
| 4862 | /* this is suboptimal, but bug compatible. User is providing their |
| 4863 | own implementation, but is getting these functions anyway, and they |
| 4864 | do nothing. But _NOIMPL users should be able to cope or fix */ |
| 4865 | # define \ |
| 4866 | mem_log_common_if(alty, num, tysz, tynm, u, oal, nal, flnm, ln, fnnm) \ |
| 4867 | /* mem_log_common_if_PERL_MEM_LOG_NOIMPL */ |
| 4868 | #endif |
| 4869 | |
| 4870 | Malloc_t |
| 4871 | Perl_mem_log_alloc(const UV n, const UV typesize, const char *type_name, |
| 4872 | Malloc_t newalloc, |
| 4873 | const char *filename, const int linenumber, |
| 4874 | const char *funcname) |
| 4875 | { |
| 4876 | mem_log_common_if(MLT_ALLOC, n, typesize, type_name, |
| 4877 | NULL, NULL, newalloc, |
| 4878 | filename, linenumber, funcname); |
| 4879 | return newalloc; |
| 4880 | } |
| 4881 | |
| 4882 | Malloc_t |
| 4883 | Perl_mem_log_realloc(const UV n, const UV typesize, const char *type_name, |
| 4884 | Malloc_t oldalloc, Malloc_t newalloc, |
| 4885 | const char *filename, const int linenumber, |
| 4886 | const char *funcname) |
| 4887 | { |
| 4888 | mem_log_common_if(MLT_REALLOC, n, typesize, type_name, |
| 4889 | NULL, oldalloc, newalloc, |
| 4890 | filename, linenumber, funcname); |
| 4891 | return newalloc; |
| 4892 | } |
| 4893 | |
| 4894 | Malloc_t |
| 4895 | Perl_mem_log_free(Malloc_t oldalloc, |
| 4896 | const char *filename, const int linenumber, |
| 4897 | const char *funcname) |
| 4898 | { |
| 4899 | mem_log_common_if(MLT_FREE, 0, 0, "", NULL, oldalloc, NULL, |
| 4900 | filename, linenumber, funcname); |
| 4901 | return oldalloc; |
| 4902 | } |
| 4903 | |
| 4904 | void |
| 4905 | Perl_mem_log_new_sv(const SV *sv, |
| 4906 | const char *filename, const int linenumber, |
| 4907 | const char *funcname) |
| 4908 | { |
| 4909 | mem_log_common_if(MLT_NEW_SV, 0, 0, "", sv, NULL, NULL, |
| 4910 | filename, linenumber, funcname); |
| 4911 | } |
| 4912 | |
| 4913 | void |
| 4914 | Perl_mem_log_del_sv(const SV *sv, |
| 4915 | const char *filename, const int linenumber, |
| 4916 | const char *funcname) |
| 4917 | { |
| 4918 | mem_log_common_if(MLT_DEL_SV, 0, 0, "", sv, NULL, NULL, |
| 4919 | filename, linenumber, funcname); |
| 4920 | } |
| 4921 | |
| 4922 | #endif /* PERL_MEM_LOG */ |
| 4923 | |
| 4924 | /* |
| 4925 | =for apidoc my_sprintf |
| 4926 | |
| 4927 | The C library C<sprintf>, wrapped if necessary, to ensure that it will return |
| 4928 | the length of the string written to the buffer. Only rare pre-ANSI systems |
| 4929 | need the wrapper function - usually this is a direct call to C<sprintf>. |
| 4930 | |
| 4931 | =cut |
| 4932 | */ |
| 4933 | #ifndef SPRINTF_RETURNS_STRLEN |
| 4934 | int |
| 4935 | Perl_my_sprintf(char *buffer, const char* pat, ...) |
| 4936 | { |
| 4937 | va_list args; |
| 4938 | PERL_ARGS_ASSERT_MY_SPRINTF; |
| 4939 | va_start(args, pat); |
| 4940 | vsprintf(buffer, pat, args); |
| 4941 | va_end(args); |
| 4942 | return strlen(buffer); |
| 4943 | } |
| 4944 | #endif |
| 4945 | |
| 4946 | /* |
| 4947 | =for apidoc quadmath_format_single |
| 4948 | |
| 4949 | quadmath_snprintf() is very strict about its format string and will |
| 4950 | fail, returning -1, if the format is invalid. It acccepts exactly |
| 4951 | one format spec. |
| 4952 | |
| 4953 | quadmath_format_single() checks that the intended single spec looks |
| 4954 | sane: begins with C<%>, has only one C<%>, ends with C<[efgaEFGA]>, |
| 4955 | and has C<Q> before it. This is not a full "printf syntax check", |
| 4956 | just the basics. |
| 4957 | |
| 4958 | Returns the format if it is valid, NULL if not. |
| 4959 | |
| 4960 | quadmath_format_single() can and will actually patch in the missing |
| 4961 | C<Q>, if necessary. In this case it will return the modified copy of |
| 4962 | the format, B<which the caller will need to free.> |
| 4963 | |
| 4964 | See also L</quadmath_format_needed>. |
| 4965 | |
| 4966 | =cut |
| 4967 | */ |
| 4968 | #ifdef USE_QUADMATH |
| 4969 | const char* |
| 4970 | Perl_quadmath_format_single(const char* format) |
| 4971 | { |
| 4972 | STRLEN len; |
| 4973 | |
| 4974 | PERL_ARGS_ASSERT_QUADMATH_FORMAT_SINGLE; |
| 4975 | |
| 4976 | if (format[0] != '%' || strchr(format + 1, '%')) |
| 4977 | return NULL; |
| 4978 | len = strlen(format); |
| 4979 | /* minimum length three: %Qg */ |
| 4980 | if (len < 3 || strchr("efgaEFGA", format[len - 1]) == NULL) |
| 4981 | return NULL; |
| 4982 | if (format[len - 2] != 'Q') { |
| 4983 | char* fixed; |
| 4984 | Newx(fixed, len + 1, char); |
| 4985 | memcpy(fixed, format, len - 1); |
| 4986 | fixed[len - 1] = 'Q'; |
| 4987 | fixed[len ] = format[len - 1]; |
| 4988 | fixed[len + 1] = 0; |
| 4989 | return (const char*)fixed; |
| 4990 | } |
| 4991 | return format; |
| 4992 | } |
| 4993 | #endif |
| 4994 | |
| 4995 | /* |
| 4996 | =for apidoc quadmath_format_needed |
| 4997 | |
| 4998 | quadmath_format_needed() returns true if the format string seems to |
| 4999 | contain at least one non-Q-prefixed %[efgaEFGA] format specifier, |
| 5000 | or returns false otherwise. |
| 5001 | |
| 5002 | The format specifier detection is not complete printf-syntax detection, |
| 5003 | but it should catch most common cases. |
| 5004 | |
| 5005 | If true is returned, those arguments B<should> in theory be processed |
| 5006 | with quadmath_snprintf(), but in case there is more than one such |
| 5007 | format specifier (see L</quadmath_format_single>), and if there is |
| 5008 | anything else beyond that one (even just a single byte), they |
| 5009 | B<cannot> be processed because quadmath_snprintf() is very strict, |
| 5010 | accepting only one format spec, and nothing else. |
| 5011 | In this case, the code should probably fail. |
| 5012 | |
| 5013 | =cut |
| 5014 | */ |
| 5015 | #ifdef USE_QUADMATH |
| 5016 | bool |
| 5017 | Perl_quadmath_format_needed(const char* format) |
| 5018 | { |
| 5019 | const char *p = format; |
| 5020 | const char *q; |
| 5021 | |
| 5022 | PERL_ARGS_ASSERT_QUADMATH_FORMAT_NEEDED; |
| 5023 | |
| 5024 | while ((q = strchr(p, '%'))) { |
| 5025 | q++; |
| 5026 | if (*q == '+') /* plus */ |
| 5027 | q++; |
| 5028 | if (*q == '#') /* alt */ |
| 5029 | q++; |
| 5030 | if (*q == '*') /* width */ |
| 5031 | q++; |
| 5032 | else { |
| 5033 | if (isDIGIT(*q)) { |
| 5034 | while (isDIGIT(*q)) q++; |
| 5035 | } |
| 5036 | } |
| 5037 | if (*q == '.' && (q[1] == '*' || isDIGIT(q[1]))) { /* prec */ |
| 5038 | q++; |
| 5039 | if (*q == '*') |
| 5040 | q++; |
| 5041 | else |
| 5042 | while (isDIGIT(*q)) q++; |
| 5043 | } |
| 5044 | if (strchr("efgaEFGA", *q)) /* Would have needed 'Q' in front. */ |
| 5045 | return TRUE; |
| 5046 | p = q + 1; |
| 5047 | } |
| 5048 | return FALSE; |
| 5049 | } |
| 5050 | #endif |
| 5051 | |
| 5052 | /* |
| 5053 | =for apidoc my_snprintf |
| 5054 | |
| 5055 | The C library C<snprintf> functionality, if available and |
| 5056 | standards-compliant (uses C<vsnprintf>, actually). However, if the |
| 5057 | C<vsnprintf> is not available, will unfortunately use the unsafe |
| 5058 | C<vsprintf> which can overrun the buffer (there is an overrun check, |
| 5059 | but that may be too late). Consider using C<sv_vcatpvf> instead, or |
| 5060 | getting C<vsnprintf>. |
| 5061 | |
| 5062 | =cut |
| 5063 | */ |
| 5064 | int |
| 5065 | Perl_my_snprintf(char *buffer, const Size_t len, const char *format, ...) |
| 5066 | { |
| 5067 | int retval = -1; |
| 5068 | va_list ap; |
| 5069 | PERL_ARGS_ASSERT_MY_SNPRINTF; |
| 5070 | #ifndef HAS_VSNPRINTF |
| 5071 | PERL_UNUSED_VAR(len); |
| 5072 | #endif |
| 5073 | va_start(ap, format); |
| 5074 | #ifdef USE_QUADMATH |
| 5075 | { |
| 5076 | const char* qfmt = quadmath_format_single(format); |
| 5077 | bool quadmath_valid = FALSE; |
| 5078 | if (qfmt) { |
| 5079 | /* If the format looked promising, use it as quadmath. */ |
| 5080 | retval = quadmath_snprintf(buffer, len, qfmt, va_arg(ap, NV)); |
| 5081 | if (retval == -1) |
| 5082 | Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt); |
| 5083 | quadmath_valid = TRUE; |
| 5084 | if (qfmt != format) |
| 5085 | Safefree(qfmt); |
| 5086 | qfmt = NULL; |
| 5087 | } |
| 5088 | assert(qfmt == NULL); |
| 5089 | /* quadmath_format_single() will return false for example for |
| 5090 | * "foo = %g", or simply "%g". We could handle the %g by |
| 5091 | * using quadmath for the NV args. More complex cases of |
| 5092 | * course exist: "foo = %g, bar = %g", or "foo=%Qg" (otherwise |
| 5093 | * quadmath-valid but has stuff in front). |
| 5094 | * |
| 5095 | * Handling the "Q-less" cases right would require walking |
| 5096 | * through the va_list and rewriting the format, calling |
| 5097 | * quadmath for the NVs, building a new va_list, and then |
| 5098 | * letting vsnprintf/vsprintf to take care of the other |
| 5099 | * arguments. This may be doable. |
| 5100 | * |
| 5101 | * We do not attempt that now. But for paranoia, we here try |
| 5102 | * to detect some common (but not all) cases where the |
| 5103 | * "Q-less" %[efgaEFGA] formats are present, and die if |
| 5104 | * detected. This doesn't fix the problem, but it stops the |
| 5105 | * vsnprintf/vsprintf pulling doubles off the va_list when |
| 5106 | * __float128 NVs should be pulled off instead. |
| 5107 | * |
| 5108 | * If quadmath_format_needed() returns false, we are reasonably |
| 5109 | * certain that we can call vnsprintf() or vsprintf() safely. */ |
| 5110 | if (!quadmath_valid && quadmath_format_needed(format)) |
| 5111 | Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", format); |
| 5112 | |
| 5113 | } |
| 5114 | #endif |
| 5115 | if (retval == -1) |
| 5116 | #ifdef HAS_VSNPRINTF |
| 5117 | retval = vsnprintf(buffer, len, format, ap); |
| 5118 | #else |
| 5119 | retval = vsprintf(buffer, format, ap); |
| 5120 | #endif |
| 5121 | va_end(ap); |
| 5122 | /* vsprintf() shows failure with < 0 */ |
| 5123 | if (retval < 0 |
| 5124 | #ifdef HAS_VSNPRINTF |
| 5125 | /* vsnprintf() shows failure with >= len */ |
| 5126 | || |
| 5127 | (len > 0 && (Size_t)retval >= len) |
| 5128 | #endif |
| 5129 | ) |
| 5130 | Perl_croak_nocontext("panic: my_snprintf buffer overflow"); |
| 5131 | return retval; |
| 5132 | } |
| 5133 | |
| 5134 | /* |
| 5135 | =for apidoc my_vsnprintf |
| 5136 | |
| 5137 | The C library C<vsnprintf> if available and standards-compliant. |
| 5138 | However, if if the C<vsnprintf> is not available, will unfortunately |
| 5139 | use the unsafe C<vsprintf> which can overrun the buffer (there is an |
| 5140 | overrun check, but that may be too late). Consider using |
| 5141 | C<sv_vcatpvf> instead, or getting C<vsnprintf>. |
| 5142 | |
| 5143 | =cut |
| 5144 | */ |
| 5145 | int |
| 5146 | Perl_my_vsnprintf(char *buffer, const Size_t len, const char *format, va_list ap) |
| 5147 | { |
| 5148 | #ifdef USE_QUADMATH |
| 5149 | PERL_UNUSED_ARG(buffer); |
| 5150 | PERL_UNUSED_ARG(len); |
| 5151 | PERL_UNUSED_ARG(format); |
| 5152 | PERL_UNUSED_ARG(ap); |
| 5153 | Perl_croak_nocontext("panic: my_vsnprintf not available with quadmath"); |
| 5154 | return 0; |
| 5155 | #else |
| 5156 | int retval; |
| 5157 | #ifdef NEED_VA_COPY |
| 5158 | va_list apc; |
| 5159 | |
| 5160 | PERL_ARGS_ASSERT_MY_VSNPRINTF; |
| 5161 | #ifndef HAS_VSNPRINTF |
| 5162 | PERL_UNUSED_VAR(len); |
| 5163 | #endif |
| 5164 | Perl_va_copy(ap, apc); |
| 5165 | # ifdef HAS_VSNPRINTF |
| 5166 | retval = vsnprintf(buffer, len, format, apc); |
| 5167 | # else |
| 5168 | retval = vsprintf(buffer, format, apc); |
| 5169 | # endif |
| 5170 | va_end(apc); |
| 5171 | #else |
| 5172 | # ifdef HAS_VSNPRINTF |
| 5173 | retval = vsnprintf(buffer, len, format, ap); |
| 5174 | # else |
| 5175 | retval = vsprintf(buffer, format, ap); |
| 5176 | # endif |
| 5177 | #endif /* #ifdef NEED_VA_COPY */ |
| 5178 | /* vsprintf() shows failure with < 0 */ |
| 5179 | if (retval < 0 |
| 5180 | #ifdef HAS_VSNPRINTF |
| 5181 | /* vsnprintf() shows failure with >= len */ |
| 5182 | || |
| 5183 | (len > 0 && (Size_t)retval >= len) |
| 5184 | #endif |
| 5185 | ) |
| 5186 | Perl_croak_nocontext("panic: my_vsnprintf buffer overflow"); |
| 5187 | return retval; |
| 5188 | #endif |
| 5189 | } |
| 5190 | |
| 5191 | void |
| 5192 | Perl_my_clearenv(pTHX) |
| 5193 | { |
| 5194 | dVAR; |
| 5195 | #if ! defined(PERL_MICRO) |
| 5196 | # if defined(PERL_IMPLICIT_SYS) || defined(WIN32) |
| 5197 | PerlEnv_clearenv(); |
| 5198 | # else /* ! (PERL_IMPLICIT_SYS || WIN32) */ |
| 5199 | # if defined(USE_ENVIRON_ARRAY) |
| 5200 | # if defined(USE_ITHREADS) |
| 5201 | /* only the parent thread can clobber the process environment */ |
| 5202 | if (PL_curinterp == aTHX) |
| 5203 | # endif /* USE_ITHREADS */ |
| 5204 | { |
| 5205 | # if ! defined(PERL_USE_SAFE_PUTENV) |
| 5206 | if ( !PL_use_safe_putenv) { |
| 5207 | I32 i; |
| 5208 | if (environ == PL_origenviron) |
| 5209 | environ = (char**)safesysmalloc(sizeof(char*)); |
| 5210 | else |
| 5211 | for (i = 0; environ[i]; i++) |
| 5212 | (void)safesysfree(environ[i]); |
| 5213 | } |
| 5214 | environ[0] = NULL; |
| 5215 | # else /* PERL_USE_SAFE_PUTENV */ |
| 5216 | # if defined(HAS_CLEARENV) |
| 5217 | (void)clearenv(); |
| 5218 | # elif defined(HAS_UNSETENV) |
| 5219 | int bsiz = 80; /* Most envvar names will be shorter than this. */ |
| 5220 | char *buf = (char*)safesysmalloc(bsiz); |
| 5221 | while (*environ != NULL) { |
| 5222 | char *e = strchr(*environ, '='); |
| 5223 | int l = e ? e - *environ : (int)strlen(*environ); |
| 5224 | if (bsiz < l + 1) { |
| 5225 | (void)safesysfree(buf); |
| 5226 | bsiz = l + 1; /* + 1 for the \0. */ |
| 5227 | buf = (char*)safesysmalloc(bsiz); |
| 5228 | } |
| 5229 | memcpy(buf, *environ, l); |
| 5230 | buf[l] = '\0'; |
| 5231 | (void)unsetenv(buf); |
| 5232 | } |
| 5233 | (void)safesysfree(buf); |
| 5234 | # else /* ! HAS_CLEARENV && ! HAS_UNSETENV */ |
| 5235 | /* Just null environ and accept the leakage. */ |
| 5236 | *environ = NULL; |
| 5237 | # endif /* HAS_CLEARENV || HAS_UNSETENV */ |
| 5238 | # endif /* ! PERL_USE_SAFE_PUTENV */ |
| 5239 | } |
| 5240 | # endif /* USE_ENVIRON_ARRAY */ |
| 5241 | # endif /* PERL_IMPLICIT_SYS || WIN32 */ |
| 5242 | #endif /* PERL_MICRO */ |
| 5243 | } |
| 5244 | |
| 5245 | #ifdef PERL_IMPLICIT_CONTEXT |
| 5246 | |
| 5247 | /* Implements the MY_CXT_INIT macro. The first time a module is loaded, |
| 5248 | the global PL_my_cxt_index is incremented, and that value is assigned to |
| 5249 | that module's static my_cxt_index (who's address is passed as an arg). |
| 5250 | Then, for each interpreter this function is called for, it makes sure a |
| 5251 | void* slot is available to hang the static data off, by allocating or |
| 5252 | extending the interpreter's PL_my_cxt_list array */ |
| 5253 | |
| 5254 | #ifndef PERL_GLOBAL_STRUCT_PRIVATE |
| 5255 | void * |
| 5256 | Perl_my_cxt_init(pTHX_ int *index, size_t size) |
| 5257 | { |
| 5258 | dVAR; |
| 5259 | void *p; |
| 5260 | PERL_ARGS_ASSERT_MY_CXT_INIT; |
| 5261 | if (*index == -1) { |
| 5262 | /* this module hasn't been allocated an index yet */ |
| 5263 | #if defined(USE_ITHREADS) |
| 5264 | MUTEX_LOCK(&PL_my_ctx_mutex); |
| 5265 | #endif |
| 5266 | *index = PL_my_cxt_index++; |
| 5267 | #if defined(USE_ITHREADS) |
| 5268 | MUTEX_UNLOCK(&PL_my_ctx_mutex); |
| 5269 | #endif |
| 5270 | } |
| 5271 | |
| 5272 | /* make sure the array is big enough */ |
| 5273 | if (PL_my_cxt_size <= *index) { |
| 5274 | if (PL_my_cxt_size) { |
| 5275 | while (PL_my_cxt_size <= *index) |
| 5276 | PL_my_cxt_size *= 2; |
| 5277 | Renew(PL_my_cxt_list, PL_my_cxt_size, void *); |
| 5278 | } |
| 5279 | else { |
| 5280 | PL_my_cxt_size = 16; |
| 5281 | Newx(PL_my_cxt_list, PL_my_cxt_size, void *); |
| 5282 | } |
| 5283 | } |
| 5284 | /* newSV() allocates one more than needed */ |
| 5285 | p = (void*)SvPVX(newSV(size-1)); |
| 5286 | PL_my_cxt_list[*index] = p; |
| 5287 | Zero(p, size, char); |
| 5288 | return p; |
| 5289 | } |
| 5290 | |
| 5291 | #else /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */ |
| 5292 | |
| 5293 | int |
| 5294 | Perl_my_cxt_index(pTHX_ const char *my_cxt_key) |
| 5295 | { |
| 5296 | dVAR; |
| 5297 | int index; |
| 5298 | |
| 5299 | PERL_ARGS_ASSERT_MY_CXT_INDEX; |
| 5300 | |
| 5301 | for (index = 0; index < PL_my_cxt_index; index++) { |
| 5302 | const char *key = PL_my_cxt_keys[index]; |
| 5303 | /* try direct pointer compare first - there are chances to success, |
| 5304 | * and it's much faster. |
| 5305 | */ |
| 5306 | if ((key == my_cxt_key) || strEQ(key, my_cxt_key)) |
| 5307 | return index; |
| 5308 | } |
| 5309 | return -1; |
| 5310 | } |
| 5311 | |
| 5312 | void * |
| 5313 | Perl_my_cxt_init(pTHX_ const char *my_cxt_key, size_t size) |
| 5314 | { |
| 5315 | dVAR; |
| 5316 | void *p; |
| 5317 | int index; |
| 5318 | |
| 5319 | PERL_ARGS_ASSERT_MY_CXT_INIT; |
| 5320 | |
| 5321 | index = Perl_my_cxt_index(aTHX_ my_cxt_key); |
| 5322 | if (index == -1) { |
| 5323 | /* this module hasn't been allocated an index yet */ |
| 5324 | #if defined(USE_ITHREADS) |
| 5325 | MUTEX_LOCK(&PL_my_ctx_mutex); |
| 5326 | #endif |
| 5327 | index = PL_my_cxt_index++; |
| 5328 | #if defined(USE_ITHREADS) |
| 5329 | MUTEX_UNLOCK(&PL_my_ctx_mutex); |
| 5330 | #endif |
| 5331 | } |
| 5332 | |
| 5333 | /* make sure the array is big enough */ |
| 5334 | if (PL_my_cxt_size <= index) { |
| 5335 | int old_size = PL_my_cxt_size; |
| 5336 | int i; |
| 5337 | if (PL_my_cxt_size) { |
| 5338 | while (PL_my_cxt_size <= index) |
| 5339 | PL_my_cxt_size *= 2; |
| 5340 | Renew(PL_my_cxt_list, PL_my_cxt_size, void *); |
| 5341 | Renew(PL_my_cxt_keys, PL_my_cxt_size, const char *); |
| 5342 | } |
| 5343 | else { |
| 5344 | PL_my_cxt_size = 16; |
| 5345 | Newx(PL_my_cxt_list, PL_my_cxt_size, void *); |
| 5346 | Newx(PL_my_cxt_keys, PL_my_cxt_size, const char *); |
| 5347 | } |
| 5348 | for (i = old_size; i < PL_my_cxt_size; i++) { |
| 5349 | PL_my_cxt_keys[i] = 0; |
| 5350 | PL_my_cxt_list[i] = 0; |
| 5351 | } |
| 5352 | } |
| 5353 | PL_my_cxt_keys[index] = my_cxt_key; |
| 5354 | /* newSV() allocates one more than needed */ |
| 5355 | p = (void*)SvPVX(newSV(size-1)); |
| 5356 | PL_my_cxt_list[index] = p; |
| 5357 | Zero(p, size, char); |
| 5358 | return p; |
| 5359 | } |
| 5360 | #endif /* #ifndef PERL_GLOBAL_STRUCT_PRIVATE */ |
| 5361 | #endif /* PERL_IMPLICIT_CONTEXT */ |
| 5362 | |
| 5363 | |
| 5364 | /* Perl_xs_handshake(): |
| 5365 | implement the various XS_*_BOOTCHECK macros, which are added to .c |
| 5366 | files by ExtUtils::ParseXS, to check that the perl the module was built |
| 5367 | with is binary compatible with the running perl. |
| 5368 | |
| 5369 | usage: |
| 5370 | Perl_xs_handshake(U32 key, void * v_my_perl, const char * file, |
| 5371 | [U32 items, U32 ax], [char * api_version], [char * xs_version]) |
| 5372 | |
| 5373 | The meaning of the varargs is determined the U32 key arg (which is not |
| 5374 | a format string). The fields of key are assembled by using HS_KEY(). |
| 5375 | |
| 5376 | Under PERL_IMPLICIT_CONTEX, the v_my_perl arg is of type |
| 5377 | "PerlInterpreter *" and represents the callers context; otherwise it is |
| 5378 | of type "CV *", and is the boot xsub's CV. |
| 5379 | |
| 5380 | v_my_perl will catch where a threaded future perl526.dll calling IO.dll |
| 5381 | for example, and IO.dll was linked with threaded perl524.dll, and both |
| 5382 | perl526.dll and perl524.dll are in %PATH and the Win32 DLL loader |
| 5383 | successfully can load IO.dll into the process but simultaneously it |
| 5384 | loaded an interpreter of a different version into the process, and XS |
| 5385 | code will naturally pass SV*s created by perl524.dll for perl526.dll to |
| 5386 | use through perl526.dll's my_perl->Istack_base. |
| 5387 | |
| 5388 | v_my_perl cannot be the first arg, since then 'key' will be out of |
| 5389 | place in a threaded vs non-threaded mixup; and analyzing the key |
| 5390 | number's bitfields won't reveal the problem, since it will be a valid |
| 5391 | key (unthreaded perl) on interp side, but croak will report the XS mod's |
| 5392 | key as gibberish (it is really a my_perl ptr) (threaded XS mod); or if |
| 5393 | it's a threaded perl and an unthreaded XS module, threaded perl will |
| 5394 | look at an uninit C stack or an uninit register to get 'key' |
| 5395 | (remember that it assumes that the 1st arg is the interp cxt). |
| 5396 | |
| 5397 | 'file' is the source filename of the caller. |
| 5398 | */ |
| 5399 | |
| 5400 | I32 |
| 5401 | Perl_xs_handshake(const U32 key, void * v_my_perl, const char * file, ...) |
| 5402 | { |
| 5403 | va_list args; |
| 5404 | U32 items, ax; |
| 5405 | void * got; |
| 5406 | void * need; |
| 5407 | #ifdef PERL_IMPLICIT_CONTEXT |
| 5408 | dTHX; |
| 5409 | tTHX xs_interp; |
| 5410 | #else |
| 5411 | CV* cv; |
| 5412 | SV *** xs_spp; |
| 5413 | #endif |
| 5414 | PERL_ARGS_ASSERT_XS_HANDSHAKE; |
| 5415 | va_start(args, file); |
| 5416 | |
| 5417 | got = INT2PTR(void*, (UV)(key & HSm_KEY_MATCH)); |
| 5418 | need = (void *)(HS_KEY(FALSE, FALSE, "", "") & HSm_KEY_MATCH); |
| 5419 | if (UNLIKELY(got != need)) |
| 5420 | goto bad_handshake; |
| 5421 | /* try to catch where a 2nd threaded perl interp DLL is loaded into a process |
| 5422 | by a XS DLL compiled against the wrong interl DLL b/c of bad @INC, and the |
| 5423 | 2nd threaded perl interp DLL never initialized its TLS/PERL_SYS_INIT3 so |
| 5424 | dTHX call from 2nd interp DLL can't return the my_perl that pp_entersub |
| 5425 | passed to the XS DLL */ |
| 5426 | #ifdef PERL_IMPLICIT_CONTEXT |
| 5427 | xs_interp = (tTHX)v_my_perl; |
| 5428 | got = xs_interp; |
| 5429 | need = my_perl; |
| 5430 | #else |
| 5431 | /* try to catch where an unthreaded perl interp DLL (for ex. perl522.dll) is |
| 5432 | loaded into a process by a XS DLL built by an unthreaded perl522.dll perl, |
| 5433 | but the DynaLoder/Perl that started the process and loaded the XS DLL is |
| 5434 | unthreaded perl524.dll, since unthreadeds don't pass my_perl (a unique *) |
| 5435 | through pp_entersub, use a unique value (which is a pointer to PL_stack_sp's |
| 5436 | location in the unthreaded perl binary) stored in CV * to figure out if this |
| 5437 | Perl_xs_handshake was called by the same pp_entersub */ |
| 5438 | cv = (CV*)v_my_perl; |
| 5439 | xs_spp = (SV***)CvHSCXT(cv); |
| 5440 | got = xs_spp; |
| 5441 | need = &PL_stack_sp; |
| 5442 | #endif |
| 5443 | if(UNLIKELY(got != need)) { |
| 5444 | bad_handshake:/* recycle branch and string from above */ |
| 5445 | if(got != (void *)HSf_NOCHK) |
| 5446 | noperl_die("%s: loadable library and perl binaries are mismatched" |
| 5447 | " (got handshake key %p, needed %p)\n", |
| 5448 | file, got, need); |
| 5449 | } |
| 5450 | |
| 5451 | if(key & HSf_SETXSUBFN) { /* this might be called from a module bootstrap */ |
| 5452 | SAVEPPTR(PL_xsubfilename);/* which was require'd from a XSUB BEGIN */ |
| 5453 | PL_xsubfilename = file; /* so the old name must be restored for |
| 5454 | additional XSUBs to register themselves */ |
| 5455 | (void)gv_fetchfile(file); |
| 5456 | } |
| 5457 | |
| 5458 | if(key & HSf_POPMARK) { |
| 5459 | ax = POPMARK; |
| 5460 | { SV **mark = PL_stack_base + ax++; |
| 5461 | { dSP; |
| 5462 | items = (I32)(SP - MARK); |
| 5463 | } |
| 5464 | } |
| 5465 | } else { |
| 5466 | items = va_arg(args, U32); |
| 5467 | ax = va_arg(args, U32); |
| 5468 | } |
| 5469 | { |
| 5470 | U32 apiverlen; |
| 5471 | assert(HS_GETAPIVERLEN(key) <= UCHAR_MAX); |
| 5472 | if((apiverlen = HS_GETAPIVERLEN(key))) { |
| 5473 | char * api_p = va_arg(args, char*); |
| 5474 | if(apiverlen != sizeof("v" PERL_API_VERSION_STRING)-1 |
| 5475 | || memNE(api_p, "v" PERL_API_VERSION_STRING, |
| 5476 | sizeof("v" PERL_API_VERSION_STRING)-1)) |
| 5477 | Perl_croak_nocontext("Perl API version %s of %"SVf" does not match %s", |
| 5478 | api_p, SVfARG(PL_stack_base[ax + 0]), |
| 5479 | "v" PERL_API_VERSION_STRING); |
| 5480 | } |
| 5481 | } |
| 5482 | { |
| 5483 | U32 xsverlen; |
| 5484 | assert(HS_GETXSVERLEN(key) <= UCHAR_MAX && HS_GETXSVERLEN(key) <= HS_APIVERLEN_MAX); |
| 5485 | if((xsverlen = HS_GETXSVERLEN(key))) |
| 5486 | S_xs_version_bootcheck(aTHX_ |
| 5487 | items, ax, va_arg(args, char*), xsverlen); |
| 5488 | } |
| 5489 | va_end(args); |
| 5490 | return ax; |
| 5491 | } |
| 5492 | |
| 5493 | |
| 5494 | STATIC void |
| 5495 | S_xs_version_bootcheck(pTHX_ U32 items, U32 ax, const char *xs_p, |
| 5496 | STRLEN xs_len) |
| 5497 | { |
| 5498 | SV *sv; |
| 5499 | const char *vn = NULL; |
| 5500 | SV *const module = PL_stack_base[ax]; |
| 5501 | |
| 5502 | PERL_ARGS_ASSERT_XS_VERSION_BOOTCHECK; |
| 5503 | |
| 5504 | if (items >= 2) /* version supplied as bootstrap arg */ |
| 5505 | sv = PL_stack_base[ax + 1]; |
| 5506 | else { |
| 5507 | /* XXX GV_ADDWARN */ |
| 5508 | vn = "XS_VERSION"; |
| 5509 | sv = get_sv(Perl_form(aTHX_ "%"SVf"::%s", SVfARG(module), vn), 0); |
| 5510 | if (!sv || !SvOK(sv)) { |
| 5511 | vn = "VERSION"; |
| 5512 | sv = get_sv(Perl_form(aTHX_ "%"SVf"::%s", SVfARG(module), vn), 0); |
| 5513 | } |
| 5514 | } |
| 5515 | if (sv) { |
| 5516 | SV *xssv = Perl_newSVpvn_flags(aTHX_ xs_p, xs_len, SVs_TEMP); |
| 5517 | SV *pmsv = sv_isobject(sv) && sv_derived_from(sv, "version") |
| 5518 | ? sv : sv_2mortal(new_version(sv)); |
| 5519 | xssv = upg_version(xssv, 0); |
| 5520 | if ( vcmp(pmsv,xssv) ) { |
| 5521 | SV *string = vstringify(xssv); |
| 5522 | SV *xpt = Perl_newSVpvf(aTHX_ "%"SVf" object version %"SVf |
| 5523 | " does not match ", SVfARG(module), SVfARG(string)); |
| 5524 | |
| 5525 | SvREFCNT_dec(string); |
| 5526 | string = vstringify(pmsv); |
| 5527 | |
| 5528 | if (vn) { |
| 5529 | Perl_sv_catpvf(aTHX_ xpt, "$%"SVf"::%s %"SVf, SVfARG(module), vn, |
| 5530 | SVfARG(string)); |
| 5531 | } else { |
| 5532 | Perl_sv_catpvf(aTHX_ xpt, "bootstrap parameter %"SVf, SVfARG(string)); |
| 5533 | } |
| 5534 | SvREFCNT_dec(string); |
| 5535 | |
| 5536 | Perl_sv_2mortal(aTHX_ xpt); |
| 5537 | Perl_croak_sv(aTHX_ xpt); |
| 5538 | } |
| 5539 | } |
| 5540 | } |
| 5541 | |
| 5542 | /* |
| 5543 | =for apidoc my_strlcat |
| 5544 | |
| 5545 | The C library C<strlcat> if available, or a Perl implementation of it. |
| 5546 | This operates on C C<NUL>-terminated strings. |
| 5547 | |
| 5548 | C<my_strlcat()> appends string C<src> to the end of C<dst>. It will append at |
| 5549 | most S<C<size - strlen(dst) - 1>> characters. It will then C<NUL>-terminate, |
| 5550 | unless C<size> is 0 or the original C<dst> string was longer than C<size> (in |
| 5551 | practice this should not happen as it means that either C<size> is incorrect or |
| 5552 | that C<dst> is not a proper C<NUL>-terminated string). |
| 5553 | |
| 5554 | Note that C<size> is the full size of the destination buffer and |
| 5555 | the result is guaranteed to be C<NUL>-terminated if there is room. Note that |
| 5556 | room for the C<NUL> should be included in C<size>. |
| 5557 | |
| 5558 | =cut |
| 5559 | |
| 5560 | Description stolen from http://www.openbsd.org/cgi-bin/man.cgi?query=strlcat |
| 5561 | */ |
| 5562 | #ifndef HAS_STRLCAT |
| 5563 | Size_t |
| 5564 | Perl_my_strlcat(char *dst, const char *src, Size_t size) |
| 5565 | { |
| 5566 | Size_t used, length, copy; |
| 5567 | |
| 5568 | used = strlen(dst); |
| 5569 | length = strlen(src); |
| 5570 | if (size > 0 && used < size - 1) { |
| 5571 | copy = (length >= size - used) ? size - used - 1 : length; |
| 5572 | memcpy(dst + used, src, copy); |
| 5573 | dst[used + copy] = '\0'; |
| 5574 | } |
| 5575 | return used + length; |
| 5576 | } |
| 5577 | #endif |
| 5578 | |
| 5579 | |
| 5580 | /* |
| 5581 | =for apidoc my_strlcpy |
| 5582 | |
| 5583 | The C library C<strlcpy> if available, or a Perl implementation of it. |
| 5584 | This operates on C C<NUL>-terminated strings. |
| 5585 | |
| 5586 | C<my_strlcpy()> copies up to S<C<size - 1>> characters from the string C<src> |
| 5587 | to C<dst>, C<NUL>-terminating the result if C<size> is not 0. |
| 5588 | |
| 5589 | =cut |
| 5590 | |
| 5591 | Description stolen from http://www.openbsd.org/cgi-bin/man.cgi?query=strlcpy |
| 5592 | */ |
| 5593 | #ifndef HAS_STRLCPY |
| 5594 | Size_t |
| 5595 | Perl_my_strlcpy(char *dst, const char *src, Size_t size) |
| 5596 | { |
| 5597 | Size_t length, copy; |
| 5598 | |
| 5599 | length = strlen(src); |
| 5600 | if (size > 0) { |
| 5601 | copy = (length >= size) ? size - 1 : length; |
| 5602 | memcpy(dst, src, copy); |
| 5603 | dst[copy] = '\0'; |
| 5604 | } |
| 5605 | return length; |
| 5606 | } |
| 5607 | #endif |
| 5608 | |
| 5609 | #if defined(_MSC_VER) && (_MSC_VER >= 1300) && (_MSC_VER < 1400) && (WINVER < 0x0500) |
| 5610 | /* VC7 or 7.1, building with pre-VC7 runtime libraries. */ |
| 5611 | long _ftol( double ); /* Defined by VC6 C libs. */ |
| 5612 | long _ftol2( double dblSource ) { return _ftol( dblSource ); } |
| 5613 | #endif |
| 5614 | |
| 5615 | PERL_STATIC_INLINE bool |
| 5616 | S_gv_has_usable_name(pTHX_ GV *gv) |
| 5617 | { |
| 5618 | GV **gvp; |
| 5619 | return GvSTASH(gv) |
| 5620 | && HvENAME(GvSTASH(gv)) |
| 5621 | && (gvp = (GV **)hv_fetchhek( |
| 5622 | GvSTASH(gv), GvNAME_HEK(gv), 0 |
| 5623 | )) |
| 5624 | && *gvp == gv; |
| 5625 | } |
| 5626 | |
| 5627 | void |
| 5628 | Perl_get_db_sub(pTHX_ SV **svp, CV *cv) |
| 5629 | { |
| 5630 | SV * const dbsv = GvSVn(PL_DBsub); |
| 5631 | const bool save_taint = TAINT_get; |
| 5632 | |
| 5633 | /* When we are called from pp_goto (svp is null), |
| 5634 | * we do not care about using dbsv to call CV; |
| 5635 | * it's for informational purposes only. |
| 5636 | */ |
| 5637 | |
| 5638 | PERL_ARGS_ASSERT_GET_DB_SUB; |
| 5639 | |
| 5640 | TAINT_set(FALSE); |
| 5641 | save_item(dbsv); |
| 5642 | if (!PERLDB_SUB_NN) { |
| 5643 | GV *gv = CvGV(cv); |
| 5644 | |
| 5645 | if (!svp && !CvLEXICAL(cv)) { |
| 5646 | gv_efullname3(dbsv, gv, NULL); |
| 5647 | } |
| 5648 | else if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED)) || CvLEXICAL(cv) |
| 5649 | || strEQ(GvNAME(gv), "END") |
| 5650 | || ( /* Could be imported, and old sub redefined. */ |
| 5651 | (GvCV(gv) != cv || !S_gv_has_usable_name(aTHX_ gv)) |
| 5652 | && |
| 5653 | !( (SvTYPE(*svp) == SVt_PVGV) |
| 5654 | && (GvCV((const GV *)*svp) == cv) |
| 5655 | /* Use GV from the stack as a fallback. */ |
| 5656 | && S_gv_has_usable_name(aTHX_ gv = (GV *)*svp) |
| 5657 | ) |
| 5658 | ) |
| 5659 | ) { |
| 5660 | /* GV is potentially non-unique, or contain different CV. */ |
| 5661 | SV * const tmp = newRV(MUTABLE_SV(cv)); |
| 5662 | sv_setsv(dbsv, tmp); |
| 5663 | SvREFCNT_dec(tmp); |
| 5664 | } |
| 5665 | else { |
| 5666 | sv_sethek(dbsv, HvENAME_HEK(GvSTASH(gv))); |
| 5667 | sv_catpvs(dbsv, "::"); |
| 5668 | sv_cathek(dbsv, GvNAME_HEK(gv)); |
| 5669 | } |
| 5670 | } |
| 5671 | else { |
| 5672 | const int type = SvTYPE(dbsv); |
| 5673 | if (type < SVt_PVIV && type != SVt_IV) |
| 5674 | sv_upgrade(dbsv, SVt_PVIV); |
| 5675 | (void)SvIOK_on(dbsv); |
| 5676 | SvIV_set(dbsv, PTR2IV(cv)); /* Do it the quickest way */ |
| 5677 | } |
| 5678 | SvSETMAGIC(dbsv); |
| 5679 | TAINT_IF(save_taint); |
| 5680 | #ifdef NO_TAINT_SUPPORT |
| 5681 | PERL_UNUSED_VAR(save_taint); |
| 5682 | #endif |
| 5683 | } |
| 5684 | |
| 5685 | int |
| 5686 | Perl_my_dirfd(DIR * dir) { |
| 5687 | |
| 5688 | /* Most dirfd implementations have problems when passed NULL. */ |
| 5689 | if(!dir) |
| 5690 | return -1; |
| 5691 | #ifdef HAS_DIRFD |
| 5692 | return dirfd(dir); |
| 5693 | #elif defined(HAS_DIR_DD_FD) |
| 5694 | return dir->dd_fd; |
| 5695 | #else |
| 5696 | Perl_croak_nocontext(PL_no_func, "dirfd"); |
| 5697 | NOT_REACHED; /* NOTREACHED */ |
| 5698 | return 0; |
| 5699 | #endif |
| 5700 | } |
| 5701 | |
| 5702 | REGEXP * |
| 5703 | Perl_get_re_arg(pTHX_ SV *sv) { |
| 5704 | |
| 5705 | if (sv) { |
| 5706 | if (SvMAGICAL(sv)) |
| 5707 | mg_get(sv); |
| 5708 | if (SvROK(sv)) |
| 5709 | sv = MUTABLE_SV(SvRV(sv)); |
| 5710 | if (SvTYPE(sv) == SVt_REGEXP) |
| 5711 | return (REGEXP*) sv; |
| 5712 | } |
| 5713 | |
| 5714 | return NULL; |
| 5715 | } |
| 5716 | |
| 5717 | /* |
| 5718 | * This code is derived from drand48() implementation from FreeBSD, |
| 5719 | * found in lib/libc/gen/_rand48.c. |
| 5720 | * |
| 5721 | * The U64 implementation is original, based on the POSIX |
| 5722 | * specification for drand48(). |
| 5723 | */ |
| 5724 | |
| 5725 | /* |
| 5726 | * Copyright (c) 1993 Martin Birgmeier |
| 5727 | * All rights reserved. |
| 5728 | * |
| 5729 | * You may redistribute unmodified or modified versions of this source |
| 5730 | * code provided that the above copyright notice and this and the |
| 5731 | * following conditions are retained. |
| 5732 | * |
| 5733 | * This software is provided ``as is'', and comes with no warranties |
| 5734 | * of any kind. I shall in no event be liable for anything that happens |
| 5735 | * to anyone/anything when using this software. |
| 5736 | */ |
| 5737 | |
| 5738 | #define FREEBSD_DRAND48_SEED_0 (0x330e) |
| 5739 | |
| 5740 | #ifdef PERL_DRAND48_QUAD |
| 5741 | |
| 5742 | #define DRAND48_MULT U64_CONST(0x5deece66d) |
| 5743 | #define DRAND48_ADD 0xb |
| 5744 | #define DRAND48_MASK U64_CONST(0xffffffffffff) |
| 5745 | |
| 5746 | #else |
| 5747 | |
| 5748 | #define FREEBSD_DRAND48_SEED_1 (0xabcd) |
| 5749 | #define FREEBSD_DRAND48_SEED_2 (0x1234) |
| 5750 | #define FREEBSD_DRAND48_MULT_0 (0xe66d) |
| 5751 | #define FREEBSD_DRAND48_MULT_1 (0xdeec) |
| 5752 | #define FREEBSD_DRAND48_MULT_2 (0x0005) |
| 5753 | #define FREEBSD_DRAND48_ADD (0x000b) |
| 5754 | |
| 5755 | const unsigned short _rand48_mult[3] = { |
| 5756 | FREEBSD_DRAND48_MULT_0, |
| 5757 | FREEBSD_DRAND48_MULT_1, |
| 5758 | FREEBSD_DRAND48_MULT_2 |
| 5759 | }; |
| 5760 | const unsigned short _rand48_add = FREEBSD_DRAND48_ADD; |
| 5761 | |
| 5762 | #endif |
| 5763 | |
| 5764 | void |
| 5765 | Perl_drand48_init_r(perl_drand48_t *random_state, U32 seed) |
| 5766 | { |
| 5767 | PERL_ARGS_ASSERT_DRAND48_INIT_R; |
| 5768 | |
| 5769 | #ifdef PERL_DRAND48_QUAD |
| 5770 | *random_state = FREEBSD_DRAND48_SEED_0 + ((U64)seed << 16); |
| 5771 | #else |
| 5772 | random_state->seed[0] = FREEBSD_DRAND48_SEED_0; |
| 5773 | random_state->seed[1] = (U16) seed; |
| 5774 | random_state->seed[2] = (U16) (seed >> 16); |
| 5775 | #endif |
| 5776 | } |
| 5777 | |
| 5778 | double |
| 5779 | Perl_drand48_r(perl_drand48_t *random_state) |
| 5780 | { |
| 5781 | PERL_ARGS_ASSERT_DRAND48_R; |
| 5782 | |
| 5783 | #ifdef PERL_DRAND48_QUAD |
| 5784 | *random_state = (*random_state * DRAND48_MULT + DRAND48_ADD) |
| 5785 | & DRAND48_MASK; |
| 5786 | |
| 5787 | return ldexp((double)*random_state, -48); |
| 5788 | #else |
| 5789 | { |
| 5790 | U32 accu; |
| 5791 | U16 temp[2]; |
| 5792 | |
| 5793 | accu = (U32) _rand48_mult[0] * (U32) random_state->seed[0] |
| 5794 | + (U32) _rand48_add; |
| 5795 | temp[0] = (U16) accu; /* lower 16 bits */ |
| 5796 | accu >>= sizeof(U16) * 8; |
| 5797 | accu += (U32) _rand48_mult[0] * (U32) random_state->seed[1] |
| 5798 | + (U32) _rand48_mult[1] * (U32) random_state->seed[0]; |
| 5799 | temp[1] = (U16) accu; /* middle 16 bits */ |
| 5800 | accu >>= sizeof(U16) * 8; |
| 5801 | accu += _rand48_mult[0] * random_state->seed[2] |
| 5802 | + _rand48_mult[1] * random_state->seed[1] |
| 5803 | + _rand48_mult[2] * random_state->seed[0]; |
| 5804 | random_state->seed[0] = temp[0]; |
| 5805 | random_state->seed[1] = temp[1]; |
| 5806 | random_state->seed[2] = (U16) accu; |
| 5807 | |
| 5808 | return ldexp((double) random_state->seed[0], -48) + |
| 5809 | ldexp((double) random_state->seed[1], -32) + |
| 5810 | ldexp((double) random_state->seed[2], -16); |
| 5811 | } |
| 5812 | #endif |
| 5813 | } |
| 5814 | |
| 5815 | #ifdef USE_C_BACKTRACE |
| 5816 | |
| 5817 | /* Possibly move all this USE_C_BACKTRACE code into a new file. */ |
| 5818 | |
| 5819 | #ifdef USE_BFD |
| 5820 | |
| 5821 | typedef struct { |
| 5822 | /* abfd is the BFD handle. */ |
| 5823 | bfd* abfd; |
| 5824 | /* bfd_syms is the BFD symbol table. */ |
| 5825 | asymbol** bfd_syms; |
| 5826 | /* bfd_text is handle to the the ".text" section of the object file. */ |
| 5827 | asection* bfd_text; |
| 5828 | /* Since opening the executable and scanning its symbols is quite |
| 5829 | * heavy operation, we remember the filename we used the last time, |
| 5830 | * and do the opening and scanning only if the filename changes. |
| 5831 | * This removes most (but not all) open+scan cycles. */ |
| 5832 | const char* fname_prev; |
| 5833 | } bfd_context; |
| 5834 | |
| 5835 | /* Given a dl_info, update the BFD context if necessary. */ |
| 5836 | static void bfd_update(bfd_context* ctx, Dl_info* dl_info) |
| 5837 | { |
| 5838 | /* BFD open and scan only if the filename changed. */ |
| 5839 | if (ctx->fname_prev == NULL || |
| 5840 | strNE(dl_info->dli_fname, ctx->fname_prev)) { |
| 5841 | if (ctx->abfd) { |
| 5842 | bfd_close(ctx->abfd); |
| 5843 | } |
| 5844 | ctx->abfd = bfd_openr(dl_info->dli_fname, 0); |
| 5845 | if (ctx->abfd) { |
| 5846 | if (bfd_check_format(ctx->abfd, bfd_object)) { |
| 5847 | IV symbol_size = bfd_get_symtab_upper_bound(ctx->abfd); |
| 5848 | if (symbol_size > 0) { |
| 5849 | Safefree(ctx->bfd_syms); |
| 5850 | Newx(ctx->bfd_syms, symbol_size, asymbol*); |
| 5851 | ctx->bfd_text = |
| 5852 | bfd_get_section_by_name(ctx->abfd, ".text"); |
| 5853 | } |
| 5854 | else |
| 5855 | ctx->abfd = NULL; |
| 5856 | } |
| 5857 | else |
| 5858 | ctx->abfd = NULL; |
| 5859 | } |
| 5860 | ctx->fname_prev = dl_info->dli_fname; |
| 5861 | } |
| 5862 | } |
| 5863 | |
| 5864 | /* Given a raw frame, try to symbolize it and store |
| 5865 | * symbol information (source file, line number) away. */ |
| 5866 | static void bfd_symbolize(bfd_context* ctx, |
| 5867 | void* raw_frame, |
| 5868 | char** symbol_name, |
| 5869 | STRLEN* symbol_name_size, |
| 5870 | char** source_name, |
| 5871 | STRLEN* source_name_size, |
| 5872 | STRLEN* source_line) |
| 5873 | { |
| 5874 | *symbol_name = NULL; |
| 5875 | *symbol_name_size = 0; |
| 5876 | if (ctx->abfd) { |
| 5877 | IV offset = PTR2IV(raw_frame) - PTR2IV(ctx->bfd_text->vma); |
| 5878 | if (offset > 0 && |
| 5879 | bfd_canonicalize_symtab(ctx->abfd, ctx->bfd_syms) > 0) { |
| 5880 | const char *file; |
| 5881 | const char *func; |
| 5882 | unsigned int line = 0; |
| 5883 | if (bfd_find_nearest_line(ctx->abfd, ctx->bfd_text, |
| 5884 | ctx->bfd_syms, offset, |
| 5885 | &file, &func, &line) && |
| 5886 | file && func && line > 0) { |
| 5887 | /* Size and copy the source file, use only |
| 5888 | * the basename of the source file. |
| 5889 | * |
| 5890 | * NOTE: the basenames are fine for the |
| 5891 | * Perl source files, but may not always |
| 5892 | * be the best idea for XS files. */ |
| 5893 | const char *p, *b = NULL; |
| 5894 | /* Look for the last slash. */ |
| 5895 | for (p = file; *p; p++) { |
| 5896 | if (*p == '/') |
| 5897 | b = p + 1; |
| 5898 | } |
| 5899 | if (b == NULL || *b == 0) { |
| 5900 | b = file; |
| 5901 | } |
| 5902 | *source_name_size = p - b + 1; |
| 5903 | Newx(*source_name, *source_name_size + 1, char); |
| 5904 | Copy(b, *source_name, *source_name_size + 1, char); |
| 5905 | |
| 5906 | *symbol_name_size = strlen(func); |
| 5907 | Newx(*symbol_name, *symbol_name_size + 1, char); |
| 5908 | Copy(func, *symbol_name, *symbol_name_size + 1, char); |
| 5909 | |
| 5910 | *source_line = line; |
| 5911 | } |
| 5912 | } |
| 5913 | } |
| 5914 | } |
| 5915 | |
| 5916 | #endif /* #ifdef USE_BFD */ |
| 5917 | |
| 5918 | #ifdef PERL_DARWIN |
| 5919 | |
| 5920 | /* OS X has no public API for for 'symbolicating' (Apple official term) |
| 5921 | * stack addresses to {function_name, source_file, line_number}. |
| 5922 | * Good news: there is command line utility atos(1) which does that. |
| 5923 | * Bad news 1: it's a command line utility. |
| 5924 | * Bad news 2: one needs to have the Developer Tools installed. |
| 5925 | * Bad news 3: in newer releases it needs to be run as 'xcrun atos'. |
| 5926 | * |
| 5927 | * To recap: we need to open a pipe for reading for a utility which |
| 5928 | * might not exist, or exists in different locations, and then parse |
| 5929 | * the output. And since this is all for a low-level API, we cannot |
| 5930 | * use high-level stuff. Thanks, Apple. */ |
| 5931 | |
| 5932 | typedef struct { |
| 5933 | /* tool is set to the absolute pathname of the tool to use: |
| 5934 | * xcrun or atos. */ |
| 5935 | const char* tool; |
| 5936 | /* format is set to a printf format string used for building |
| 5937 | * the external command to run. */ |
| 5938 | const char* format; |
| 5939 | /* unavail is set if e.g. xcrun cannot be found, or something |
| 5940 | * else happens that makes getting the backtrace dubious. Note, |
| 5941 | * however, that the context isn't persistent, the next call to |
| 5942 | * get_c_backtrace() will start from scratch. */ |
| 5943 | bool unavail; |
| 5944 | /* fname is the current object file name. */ |
| 5945 | const char* fname; |
| 5946 | /* object_base_addr is the base address of the shared object. */ |
| 5947 | void* object_base_addr; |
| 5948 | } atos_context; |
| 5949 | |
| 5950 | /* Given |dl_info|, updates the context. If the context has been |
| 5951 | * marked unavailable, return immediately. If not but the tool has |
| 5952 | * not been set, set it to either "xcrun atos" or "atos" (also set the |
| 5953 | * format to use for creating commands for piping), or if neither is |
| 5954 | * unavailable (one needs the Developer Tools installed), mark the context |
| 5955 | * an unavailable. Finally, update the filename (object name), |
| 5956 | * and its base address. */ |
| 5957 | |
| 5958 | static void atos_update(atos_context* ctx, |
| 5959 | Dl_info* dl_info) |
| 5960 | { |
| 5961 | if (ctx->unavail) |
| 5962 | return; |
| 5963 | if (ctx->tool == NULL) { |
| 5964 | const char* tools[] = { |
| 5965 | "/usr/bin/xcrun", |
| 5966 | "/usr/bin/atos" |
| 5967 | }; |
| 5968 | const char* formats[] = { |
| 5969 | "/usr/bin/xcrun atos -o '%s' -l %08x %08x 2>&1", |
| 5970 | "/usr/bin/atos -d -o '%s' -l %08x %08x 2>&1" |
| 5971 | }; |
| 5972 | struct stat st; |
| 5973 | UV i; |
| 5974 | for (i = 0; i < C_ARRAY_LENGTH(tools); i++) { |
| 5975 | if (stat(tools[i], &st) == 0 && S_ISREG(st.st_mode)) { |
| 5976 | ctx->tool = tools[i]; |
| 5977 | ctx->format = formats[i]; |
| 5978 | break; |
| 5979 | } |
| 5980 | } |
| 5981 | if (ctx->tool == NULL) { |
| 5982 | ctx->unavail = TRUE; |
| 5983 | return; |
| 5984 | } |
| 5985 | } |
| 5986 | if (ctx->fname == NULL || |
| 5987 | strNE(dl_info->dli_fname, ctx->fname)) { |
| 5988 | ctx->fname = dl_info->dli_fname; |
| 5989 | ctx->object_base_addr = dl_info->dli_fbase; |
| 5990 | } |
| 5991 | } |
| 5992 | |
| 5993 | /* Given an output buffer end |p| and its |start|, matches |
| 5994 | * for the atos output, extracting the source code location |
| 5995 | * and returning non-NULL if possible, returning NULL otherwise. */ |
| 5996 | static const char* atos_parse(const char* p, |
| 5997 | const char* start, |
| 5998 | STRLEN* source_name_size, |
| 5999 | STRLEN* source_line) { |
| 6000 | /* atos() output is something like: |
| 6001 | * perl_parse (in miniperl) (perl.c:2314)\n\n". |
| 6002 | * We cannot use Perl regular expressions, because we need to |
| 6003 | * stay low-level. Therefore here we have a rolled-out version |
| 6004 | * of a state machine which matches _backwards_from_the_end_ and |
| 6005 | * if there's a success, returns the starts of the filename, |
| 6006 | * also setting the filename size and the source line number. |
| 6007 | * The matched regular expression is roughly "\(.*:\d+\)\s*$" */ |
| 6008 | const char* source_number_start; |
| 6009 | const char* source_name_end; |
| 6010 | const char* source_line_end; |
| 6011 | const char* close_paren; |
| 6012 | UV uv; |
| 6013 | |
| 6014 | /* Skip trailing whitespace. */ |
| 6015 | while (p > start && isspace(*p)) p--; |
| 6016 | /* Now we should be at the close paren. */ |
| 6017 | if (p == start || *p != ')') |
| 6018 | return NULL; |
| 6019 | close_paren = p; |
| 6020 | p--; |
| 6021 | /* Now we should be in the line number. */ |
| 6022 | if (p == start || !isdigit(*p)) |
| 6023 | return NULL; |
| 6024 | /* Skip over the digits. */ |
| 6025 | while (p > start && isdigit(*p)) |
| 6026 | p--; |
| 6027 | /* Now we should be at the colon. */ |
| 6028 | if (p == start || *p != ':') |
| 6029 | return NULL; |
| 6030 | source_number_start = p + 1; |
| 6031 | source_name_end = p; /* Just beyond the end. */ |
| 6032 | p--; |
| 6033 | /* Look for the open paren. */ |
| 6034 | while (p > start && *p != '(') |
| 6035 | p--; |
| 6036 | if (p == start) |
| 6037 | return NULL; |
| 6038 | p++; |
| 6039 | *source_name_size = source_name_end - p; |
| 6040 | if (grok_atoUV(source_number_start, &uv, &source_line_end) |
| 6041 | && source_line_end == close_paren |
| 6042 | && uv <= MAX_STRLEN |
| 6043 | ) { |
| 6044 | *source_line = (STRLEN)uv; |
| 6045 | return p; |
| 6046 | } |
| 6047 | return NULL; |
| 6048 | } |
| 6049 | |
| 6050 | /* Given a raw frame, read a pipe from the symbolicator (that's the |
| 6051 | * technical term) atos, reads the result, and parses the source code |
| 6052 | * location. We must stay low-level, so we use snprintf(), pipe(), |
| 6053 | * and fread(), and then also parse the output ourselves. */ |
| 6054 | static void atos_symbolize(atos_context* ctx, |
| 6055 | void* raw_frame, |
| 6056 | char** source_name, |
| 6057 | STRLEN* source_name_size, |
| 6058 | STRLEN* source_line) |
| 6059 | { |
| 6060 | char cmd[1024]; |
| 6061 | const char* p; |
| 6062 | Size_t cnt; |
| 6063 | |
| 6064 | if (ctx->unavail) |
| 6065 | return; |
| 6066 | /* Simple security measure: if there's any funny business with |
| 6067 | * the object name (used as "-o '%s'" ), leave since at least |
| 6068 | * partially the user controls it. */ |
| 6069 | for (p = ctx->fname; *p; p++) { |
| 6070 | if (*p == '\'' || iscntrl(*p)) { |
| 6071 | ctx->unavail = TRUE; |
| 6072 | return; |
| 6073 | } |
| 6074 | } |
| 6075 | cnt = snprintf(cmd, sizeof(cmd), ctx->format, |
| 6076 | ctx->fname, ctx->object_base_addr, raw_frame); |
| 6077 | if (cnt < sizeof(cmd)) { |
| 6078 | /* Undo nostdio.h #defines that disable stdio. |
| 6079 | * This is somewhat naughty, but is used elsewhere |
| 6080 | * in the core, and affects only OS X. */ |
| 6081 | #undef FILE |
| 6082 | #undef popen |
| 6083 | #undef fread |
| 6084 | #undef pclose |
| 6085 | FILE* fp = popen(cmd, "r"); |
| 6086 | /* At the moment we open a new pipe for each stack frame. |
| 6087 | * This is naturally somewhat slow, but hopefully generating |
| 6088 | * stack traces is never going to in a performance critical path. |
| 6089 | * |
| 6090 | * We could play tricks with atos by batching the stack |
| 6091 | * addresses to be resolved: atos can either take multiple |
| 6092 | * addresses from the command line, or read addresses from |
| 6093 | * a file (though the mess of creating temporary files would |
| 6094 | * probably negate much of any possible speedup). |
| 6095 | * |
| 6096 | * Normally there are only two objects present in the backtrace: |
| 6097 | * perl itself, and the libdyld.dylib. (Note that the object |
| 6098 | * filenames contain the full pathname, so perl may not always |
| 6099 | * be in the same place.) Whenever the object in the |
| 6100 | * backtrace changes, the base address also changes. |
| 6101 | * |
| 6102 | * The problem with batching the addresses, though, would be |
| 6103 | * matching the results with the addresses: the parsing of |
| 6104 | * the results is already painful enough with a single address. */ |
| 6105 | if (fp) { |
| 6106 | char out[1024]; |
| 6107 | UV cnt = fread(out, 1, sizeof(out), fp); |
| 6108 | if (cnt < sizeof(out)) { |
| 6109 | const char* p = atos_parse(out + cnt, out, |
| 6110 | source_name_size, |
| 6111 | source_line); |
| 6112 | if (p) { |
| 6113 | Newx(*source_name, |
| 6114 | *source_name_size + 1, char); |
| 6115 | Copy(p, *source_name, |
| 6116 | *source_name_size + 1, char); |
| 6117 | } |
| 6118 | } |
| 6119 | pclose(fp); |
| 6120 | } |
| 6121 | } |
| 6122 | } |
| 6123 | |
| 6124 | #endif /* #ifdef PERL_DARWIN */ |
| 6125 | |
| 6126 | /* |
| 6127 | =for apidoc get_c_backtrace |
| 6128 | |
| 6129 | Collects the backtrace (aka "stacktrace") into a single linear |
| 6130 | malloced buffer, which the caller B<must> Perl_free_c_backtrace(). |
| 6131 | |
| 6132 | Scans the frames back by depth + skip, then drops the skip innermost, |
| 6133 | returning at most depth frames. |
| 6134 | |
| 6135 | =cut |
| 6136 | */ |
| 6137 | |
| 6138 | Perl_c_backtrace* |
| 6139 | Perl_get_c_backtrace(pTHX_ int depth, int skip) |
| 6140 | { |
| 6141 | /* Note that here we must stay as low-level as possible: Newx(), |
| 6142 | * Copy(), Safefree(); since we may be called from anywhere, |
| 6143 | * so we should avoid higher level constructs like SVs or AVs. |
| 6144 | * |
| 6145 | * Since we are using safesysmalloc() via Newx(), don't try |
| 6146 | * getting backtrace() there, unless you like deep recursion. */ |
| 6147 | |
| 6148 | /* Currently only implemented with backtrace() and dladdr(), |
| 6149 | * for other platforms NULL is returned. */ |
| 6150 | |
| 6151 | #if defined(HAS_BACKTRACE) && defined(HAS_DLADDR) |
| 6152 | /* backtrace() is available via <execinfo.h> in glibc and in most |
| 6153 | * modern BSDs; dladdr() is available via <dlfcn.h>. */ |
| 6154 | |
| 6155 | /* We try fetching this many frames total, but then discard |
| 6156 | * the |skip| first ones. For the remaining ones we will try |
| 6157 | * retrieving more information with dladdr(). */ |
| 6158 | int try_depth = skip + depth; |
| 6159 | |
| 6160 | /* The addresses (program counters) returned by backtrace(). */ |
| 6161 | void** raw_frames; |
| 6162 | |
| 6163 | /* Retrieved with dladdr() from the addresses returned by backtrace(). */ |
| 6164 | Dl_info* dl_infos; |
| 6165 | |
| 6166 | /* Sizes _including_ the terminating \0 of the object name |
| 6167 | * and symbol name strings. */ |
| 6168 | STRLEN* object_name_sizes; |
| 6169 | STRLEN* symbol_name_sizes; |
| 6170 | |
| 6171 | #ifdef USE_BFD |
| 6172 | /* The symbol names comes either from dli_sname, |
| 6173 | * or if using BFD, they can come from BFD. */ |
| 6174 | char** symbol_names; |
| 6175 | #endif |
| 6176 | |
| 6177 | /* The source code location information. Dug out with e.g. BFD. */ |
| 6178 | char** source_names; |
| 6179 | STRLEN* source_name_sizes; |
| 6180 | STRLEN* source_lines; |
| 6181 | |
| 6182 | Perl_c_backtrace* bt = NULL; /* This is what will be returned. */ |
| 6183 | int got_depth; /* How many frames were returned from backtrace(). */ |
| 6184 | UV frame_count = 0; /* How many frames we return. */ |
| 6185 | UV total_bytes = 0; /* The size of the whole returned backtrace. */ |
| 6186 | |
| 6187 | #ifdef USE_BFD |
| 6188 | bfd_context bfd_ctx; |
| 6189 | #endif |
| 6190 | #ifdef PERL_DARWIN |
| 6191 | atos_context atos_ctx; |
| 6192 | #endif |
| 6193 | |
| 6194 | /* Here are probably possibilities for optimizing. We could for |
| 6195 | * example have a struct that contains most of these and then |
| 6196 | * allocate |try_depth| of them, saving a bunch of malloc calls. |
| 6197 | * Note, however, that |frames| could not be part of that struct |
| 6198 | * because backtrace() will want an array of just them. Also be |
| 6199 | * careful about the name strings. */ |
| 6200 | Newx(raw_frames, try_depth, void*); |
| 6201 | Newx(dl_infos, try_depth, Dl_info); |
| 6202 | Newx(object_name_sizes, try_depth, STRLEN); |
| 6203 | Newx(symbol_name_sizes, try_depth, STRLEN); |
| 6204 | Newx(source_names, try_depth, char*); |
| 6205 | Newx(source_name_sizes, try_depth, STRLEN); |
| 6206 | Newx(source_lines, try_depth, STRLEN); |
| 6207 | #ifdef USE_BFD |
| 6208 | Newx(symbol_names, try_depth, char*); |
| 6209 | #endif |
| 6210 | |
| 6211 | /* Get the raw frames. */ |
| 6212 | got_depth = (int)backtrace(raw_frames, try_depth); |
| 6213 | |
| 6214 | /* We use dladdr() instead of backtrace_symbols() because we want |
| 6215 | * the full details instead of opaque strings. This is useful for |
| 6216 | * two reasons: () the details are needed for further symbolic |
| 6217 | * digging, for example in OS X (2) by having the details we fully |
| 6218 | * control the output, which in turn is useful when more platforms |
| 6219 | * are added: we can keep out output "portable". */ |
| 6220 | |
| 6221 | /* We want a single linear allocation, which can then be freed |
| 6222 | * with a single swoop. We will do the usual trick of first |
| 6223 | * walking over the structure and seeing how much we need to |
| 6224 | * allocate, then allocating, and then walking over the structure |
| 6225 | * the second time and populating it. */ |
| 6226 | |
| 6227 | /* First we must compute the total size of the buffer. */ |
| 6228 | total_bytes = sizeof(Perl_c_backtrace_header); |
| 6229 | if (got_depth > skip) { |
| 6230 | int i; |
| 6231 | #ifdef USE_BFD |
| 6232 | bfd_init(); /* Is this safe to call multiple times? */ |
| 6233 | Zero(&bfd_ctx, 1, bfd_context); |
| 6234 | #endif |
| 6235 | #ifdef PERL_DARWIN |
| 6236 | Zero(&atos_ctx, 1, atos_context); |
| 6237 | #endif |
| 6238 | for (i = skip; i < try_depth; i++) { |
| 6239 | Dl_info* dl_info = &dl_infos[i]; |
| 6240 | |
| 6241 | total_bytes += sizeof(Perl_c_backtrace_frame); |
| 6242 | |
| 6243 | source_names[i] = NULL; |
| 6244 | source_name_sizes[i] = 0; |
| 6245 | source_lines[i] = 0; |
| 6246 | |
| 6247 | /* Yes, zero from dladdr() is failure. */ |
| 6248 | if (dladdr(raw_frames[i], dl_info)) { |
| 6249 | object_name_sizes[i] = |
| 6250 | dl_info->dli_fname ? strlen(dl_info->dli_fname) : 0; |
| 6251 | symbol_name_sizes[i] = |
| 6252 | dl_info->dli_sname ? strlen(dl_info->dli_sname) : 0; |
| 6253 | #ifdef USE_BFD |
| 6254 | bfd_update(&bfd_ctx, dl_info); |
| 6255 | bfd_symbolize(&bfd_ctx, raw_frames[i], |
| 6256 | &symbol_names[i], |
| 6257 | &symbol_name_sizes[i], |
| 6258 | &source_names[i], |
| 6259 | &source_name_sizes[i], |
| 6260 | &source_lines[i]); |
| 6261 | #endif |
| 6262 | #if PERL_DARWIN |
| 6263 | atos_update(&atos_ctx, dl_info); |
| 6264 | atos_symbolize(&atos_ctx, |
| 6265 | raw_frames[i], |
| 6266 | &source_names[i], |
| 6267 | &source_name_sizes[i], |
| 6268 | &source_lines[i]); |
| 6269 | #endif |
| 6270 | |
| 6271 | /* Plus ones for the terminating \0. */ |
| 6272 | total_bytes += object_name_sizes[i] + 1; |
| 6273 | total_bytes += symbol_name_sizes[i] + 1; |
| 6274 | total_bytes += source_name_sizes[i] + 1; |
| 6275 | |
| 6276 | frame_count++; |
| 6277 | } else { |
| 6278 | break; |
| 6279 | } |
| 6280 | } |
| 6281 | #ifdef USE_BFD |
| 6282 | Safefree(bfd_ctx.bfd_syms); |
| 6283 | #endif |
| 6284 | } |
| 6285 | |
| 6286 | /* Now we can allocate and populate the result buffer. */ |
| 6287 | Newxc(bt, total_bytes, char, Perl_c_backtrace); |
| 6288 | Zero(bt, total_bytes, char); |
| 6289 | bt->header.frame_count = frame_count; |
| 6290 | bt->header.total_bytes = total_bytes; |
| 6291 | if (frame_count > 0) { |
| 6292 | Perl_c_backtrace_frame* frame = bt->frame_info; |
| 6293 | char* name_base = (char *)(frame + frame_count); |
| 6294 | char* name_curr = name_base; /* Outputting the name strings here. */ |
| 6295 | UV i; |
| 6296 | for (i = skip; i < skip + frame_count; i++) { |
| 6297 | Dl_info* dl_info = &dl_infos[i]; |
| 6298 | |
| 6299 | frame->addr = raw_frames[i]; |
| 6300 | frame->object_base_addr = dl_info->dli_fbase; |
| 6301 | frame->symbol_addr = dl_info->dli_saddr; |
| 6302 | |
| 6303 | /* Copies a string, including the \0, and advances the name_curr. |
| 6304 | * Also copies the start and the size to the frame. */ |
| 6305 | #define PERL_C_BACKTRACE_STRCPY(frame, doffset, src, dsize, size) \ |
| 6306 | if (size && src) \ |
| 6307 | Copy(src, name_curr, size, char); \ |
| 6308 | frame->doffset = name_curr - (char*)bt; \ |
| 6309 | frame->dsize = size; \ |
| 6310 | name_curr += size; \ |
| 6311 | *name_curr++ = 0; |
| 6312 | |
| 6313 | PERL_C_BACKTRACE_STRCPY(frame, object_name_offset, |
| 6314 | dl_info->dli_fname, |
| 6315 | object_name_size, object_name_sizes[i]); |
| 6316 | |
| 6317 | #ifdef USE_BFD |
| 6318 | PERL_C_BACKTRACE_STRCPY(frame, symbol_name_offset, |
| 6319 | symbol_names[i], |
| 6320 | symbol_name_size, symbol_name_sizes[i]); |
| 6321 | Safefree(symbol_names[i]); |
| 6322 | #else |
| 6323 | PERL_C_BACKTRACE_STRCPY(frame, symbol_name_offset, |
| 6324 | dl_info->dli_sname, |
| 6325 | symbol_name_size, symbol_name_sizes[i]); |
| 6326 | #endif |
| 6327 | |
| 6328 | PERL_C_BACKTRACE_STRCPY(frame, source_name_offset, |
| 6329 | source_names[i], |
| 6330 | source_name_size, source_name_sizes[i]); |
| 6331 | Safefree(source_names[i]); |
| 6332 | |
| 6333 | #undef PERL_C_BACKTRACE_STRCPY |
| 6334 | |
| 6335 | frame->source_line_number = source_lines[i]; |
| 6336 | |
| 6337 | frame++; |
| 6338 | } |
| 6339 | assert(total_bytes == |
| 6340 | (UV)(sizeof(Perl_c_backtrace_header) + |
| 6341 | frame_count * sizeof(Perl_c_backtrace_frame) + |
| 6342 | name_curr - name_base)); |
| 6343 | } |
| 6344 | #ifdef USE_BFD |
| 6345 | Safefree(symbol_names); |
| 6346 | if (bfd_ctx.abfd) { |
| 6347 | bfd_close(bfd_ctx.abfd); |
| 6348 | } |
| 6349 | #endif |
| 6350 | Safefree(source_lines); |
| 6351 | Safefree(source_name_sizes); |
| 6352 | Safefree(source_names); |
| 6353 | Safefree(symbol_name_sizes); |
| 6354 | Safefree(object_name_sizes); |
| 6355 | /* Assuming the strings returned by dladdr() are pointers |
| 6356 | * to read-only static memory (the object file), so that |
| 6357 | * they do not need freeing (and cannot be). */ |
| 6358 | Safefree(dl_infos); |
| 6359 | Safefree(raw_frames); |
| 6360 | return bt; |
| 6361 | #else |
| 6362 | PERL_UNUSED_ARGV(depth); |
| 6363 | PERL_UNUSED_ARGV(skip); |
| 6364 | return NULL; |
| 6365 | #endif |
| 6366 | } |
| 6367 | |
| 6368 | /* |
| 6369 | =for apidoc free_c_backtrace |
| 6370 | |
| 6371 | Deallocates a backtrace received from get_c_bracktrace. |
| 6372 | |
| 6373 | =cut |
| 6374 | */ |
| 6375 | |
| 6376 | /* |
| 6377 | =for apidoc get_c_backtrace_dump |
| 6378 | |
| 6379 | Returns a SV a dump of |depth| frames of the call stack, skipping |
| 6380 | the |skip| innermost ones. depth of 20 is usually enough. |
| 6381 | |
| 6382 | The appended output looks like: |
| 6383 | |
| 6384 | ... |
| 6385 | 1 10e004812:0082 Perl_croak util.c:1716 /usr/bin/perl |
| 6386 | 2 10df8d6d2:1d72 perl_parse perl.c:3975 /usr/bin/perl |
| 6387 | ... |
| 6388 | |
| 6389 | The fields are tab-separated. The first column is the depth (zero |
| 6390 | being the innermost non-skipped frame). In the hex:offset, the hex is |
| 6391 | where the program counter was in S_parse_body, and the :offset (might |
| 6392 | be missing) tells how much inside the S_parse_body the program counter was. |
| 6393 | |
| 6394 | The util.c:1716 is the source code file and line number. |
| 6395 | |
| 6396 | The F</usr/bin/perl> is obvious (hopefully). |
| 6397 | |
| 6398 | Unknowns are C<"-">. Unknowns can happen unfortunately quite easily: |
| 6399 | if the platform doesn't support retrieving the information; |
| 6400 | if the binary is missing the debug information; |
| 6401 | if the optimizer has transformed the code by for example inlining. |
| 6402 | |
| 6403 | =cut |
| 6404 | */ |
| 6405 | |
| 6406 | SV* |
| 6407 | Perl_get_c_backtrace_dump(pTHX_ int depth, int skip) |
| 6408 | { |
| 6409 | Perl_c_backtrace* bt; |
| 6410 | |
| 6411 | bt = get_c_backtrace(depth, skip + 1 /* Hide ourselves. */); |
| 6412 | if (bt) { |
| 6413 | Perl_c_backtrace_frame* frame; |
| 6414 | SV* dsv = newSVpvs(""); |
| 6415 | UV i; |
| 6416 | for (i = 0, frame = bt->frame_info; |
| 6417 | i < bt->header.frame_count; i++, frame++) { |
| 6418 | Perl_sv_catpvf(aTHX_ dsv, "%d", (int)i); |
| 6419 | Perl_sv_catpvf(aTHX_ dsv, "\t%p", frame->addr ? frame->addr : "-"); |
| 6420 | /* Symbol (function) names might disappear without debug info. |
| 6421 | * |
| 6422 | * The source code location might disappear in case of the |
| 6423 | * optimizer inlining or otherwise rearranging the code. */ |
| 6424 | if (frame->symbol_addr) { |
| 6425 | Perl_sv_catpvf(aTHX_ dsv, ":%04x", |
| 6426 | (int) |
| 6427 | ((char*)frame->addr - (char*)frame->symbol_addr)); |
| 6428 | } |
| 6429 | Perl_sv_catpvf(aTHX_ dsv, "\t%s", |
| 6430 | frame->symbol_name_size && |
| 6431 | frame->symbol_name_offset ? |
| 6432 | (char*)bt + frame->symbol_name_offset : "-"); |
| 6433 | if (frame->source_name_size && |
| 6434 | frame->source_name_offset && |
| 6435 | frame->source_line_number) { |
| 6436 | Perl_sv_catpvf(aTHX_ dsv, "\t%s:%"UVuf, |
| 6437 | (char*)bt + frame->source_name_offset, |
| 6438 | (UV)frame->source_line_number); |
| 6439 | } else { |
| 6440 | Perl_sv_catpvf(aTHX_ dsv, "\t-"); |
| 6441 | } |
| 6442 | Perl_sv_catpvf(aTHX_ dsv, "\t%s", |
| 6443 | frame->object_name_size && |
| 6444 | frame->object_name_offset ? |
| 6445 | (char*)bt + frame->object_name_offset : "-"); |
| 6446 | /* The frame->object_base_addr is not output, |
| 6447 | * but it is used for symbolizing/symbolicating. */ |
| 6448 | sv_catpvs(dsv, "\n"); |
| 6449 | } |
| 6450 | |
| 6451 | Perl_free_c_backtrace(aTHX_ bt); |
| 6452 | |
| 6453 | return dsv; |
| 6454 | } |
| 6455 | |
| 6456 | return NULL; |
| 6457 | } |
| 6458 | |
| 6459 | /* |
| 6460 | =for apidoc dump_c_backtrace |
| 6461 | |
| 6462 | Dumps the C backtrace to the given fp. |
| 6463 | |
| 6464 | Returns true if a backtrace could be retrieved, false if not. |
| 6465 | |
| 6466 | =cut |
| 6467 | */ |
| 6468 | |
| 6469 | bool |
| 6470 | Perl_dump_c_backtrace(pTHX_ PerlIO* fp, int depth, int skip) |
| 6471 | { |
| 6472 | SV* sv; |
| 6473 | |
| 6474 | PERL_ARGS_ASSERT_DUMP_C_BACKTRACE; |
| 6475 | |
| 6476 | sv = Perl_get_c_backtrace_dump(aTHX_ depth, skip); |
| 6477 | if (sv) { |
| 6478 | sv_2mortal(sv); |
| 6479 | PerlIO_printf(fp, "%s", SvPV_nolen(sv)); |
| 6480 | return TRUE; |
| 6481 | } |
| 6482 | return FALSE; |
| 6483 | } |
| 6484 | |
| 6485 | #endif /* #ifdef USE_C_BACKTRACE */ |
| 6486 | |
| 6487 | /* |
| 6488 | * ex: set ts=8 sts=4 sw=4 et: |
| 6489 | */ |