1 #line 2 "perl.c"
2 /* perl.c
3 *
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 by Larry Wall
7 * and others
8 *
9 * You may distribute under the terms of either the GNU General Public
10 * License or the Artistic License, as specified in the README file.
11 *
12 */
13
14 /*
15 * A ship then new they built for him
16 * of mithril and of elven-glass
17 * --from Bilbo's song of Eärendil
18 *
19 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
20 */
21
22 /* This file contains the top-level functions that are used to create, use
23 * and destroy a perl interpreter, plus the functions used by XS code to
24 * call back into perl. Note that it does not contain the actual main()
25 * function of the interpreter; that can be found in perlmain.c
26 *
27 * Note that at build time this file is also linked to as perlmini.c,
28 * and perlmini.o is then built with PERL_IS_MINIPERL defined, which is
29 * then used to create the miniperl executable, rather than perl.o.
30 */
31
32 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
33 # define USE_SITECUSTOMIZE
34 #endif
35
36 #include "EXTERN.h"
37 #define PERL_IN_PERL_C
38 #include "perl.h"
39 #include "patchlevel.h" /* for local_patches */
40 #include "XSUB.h"
41
42 #ifdef NETWARE
43 #include "nwutil.h"
44 #endif
45
46 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
47 # ifdef I_SYSUIO
48 # include <sys/uio.h>
49 # endif
50
51 union control_un {
52 struct cmsghdr cm;
53 char control[CMSG_SPACE(sizeof(int))];
54 };
55
56 #endif
57
58 #ifndef HZ
59 # ifdef CLK_TCK
60 # define HZ CLK_TCK
61 # else
62 # define HZ 60
63 # endif
64 #endif
65
66 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
67
68 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
69 # define validate_suid(rsfp) NOOP
70 #else
71 # define validate_suid(rsfp) S_validate_suid(aTHX_ rsfp)
72 #endif
73
74 #define CALL_BODY_SUB(myop) \
75 if (PL_op == (myop)) \
76 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
77 if (PL_op) \
78 CALLRUNOPS(aTHX);
79
80 #define CALL_LIST_BODY(cv) \
81 PUSHMARK(PL_stack_sp); \
82 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
83
84 static void
S_init_tls_and_interp(PerlInterpreter * my_perl)85 S_init_tls_and_interp(PerlInterpreter *my_perl)
86 {
87 if (!PL_curinterp) {
88 PERL_SET_INTERP(my_perl);
89 #if defined(USE_ITHREADS)
90 INIT_THREADS;
91 ALLOC_THREAD_KEY;
92 PERL_SET_THX(my_perl);
93 OP_REFCNT_INIT;
94 OP_CHECK_MUTEX_INIT;
95 KEYWORD_PLUGIN_MUTEX_INIT;
96 HINTS_REFCNT_INIT;
97 LOCALE_INIT;
98 USER_PROP_MUTEX_INIT;
99 ENV_INIT;
100 MUTEX_INIT(&PL_dollarzero_mutex);
101 MUTEX_INIT(&PL_my_ctx_mutex);
102 # endif
103 }
104 #if defined(USE_ITHREADS)
105 else
106 #else
107 /* This always happens for non-ithreads */
108 #endif
109 {
110 PERL_SET_THX(my_perl);
111 }
112 }
113
114
115 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
116
117 void
Perl_sys_init(int * argc,char *** argv)118 Perl_sys_init(int* argc, char*** argv)
119 {
120
121 PERL_ARGS_ASSERT_SYS_INIT;
122
123 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
124 PERL_UNUSED_ARG(argv);
125 PERL_SYS_INIT_BODY(argc, argv);
126 }
127
128 void
Perl_sys_init3(int * argc,char *** argv,char *** env)129 Perl_sys_init3(int* argc, char*** argv, char*** env)
130 {
131
132 PERL_ARGS_ASSERT_SYS_INIT3;
133
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_UNUSED_ARG(env);
137 PERL_SYS_INIT3_BODY(argc, argv, env);
138 }
139
140 void
Perl_sys_term(void)141 Perl_sys_term(void)
142 {
143 if (!PL_veto_cleanup) {
144 PERL_SYS_TERM_BODY();
145 }
146 }
147
148
149 #ifdef PERL_IMPLICIT_SYS
150 PerlInterpreter *
perl_alloc_using(struct IPerlMem * ipM,struct IPerlMem * ipMS,struct IPerlMem * ipMP,struct IPerlEnv * ipE,struct IPerlStdIO * ipStd,struct IPerlLIO * ipLIO,struct IPerlDir * ipD,struct IPerlSock * ipS,struct IPerlProc * ipP)151 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
152 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
153 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
154 struct IPerlDir* ipD, struct IPerlSock* ipS,
155 struct IPerlProc* ipP)
156 {
157 PerlInterpreter *my_perl;
158
159 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
160
161 /* Newx() needs interpreter, so call malloc() instead */
162 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
163 S_init_tls_and_interp(my_perl);
164 Zero(my_perl, 1, PerlInterpreter);
165 PL_Mem = ipM;
166 PL_MemShared = ipMS;
167 PL_MemParse = ipMP;
168 PL_Env = ipE;
169 PL_StdIO = ipStd;
170 PL_LIO = ipLIO;
171 PL_Dir = ipD;
172 PL_Sock = ipS;
173 PL_Proc = ipP;
174 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
175
176 return my_perl;
177 }
178 #else
179
180 /*
181 =for apidoc_section $embedding
182
183 =for apidoc perl_alloc
184
185 Allocates a new Perl interpreter. See L<perlembed>.
186
187 =cut
188 */
189
190 PerlInterpreter *
perl_alloc(void)191 perl_alloc(void)
192 {
193 PerlInterpreter *my_perl;
194
195 /* Newx() needs interpreter, so call malloc() instead */
196 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
197
198 S_init_tls_and_interp(my_perl);
199 #ifndef PERL_TRACK_MEMPOOL
200 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
201 #else
202 Zero(my_perl, 1, PerlInterpreter);
203 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
204 return my_perl;
205 #endif
206 }
207 #endif /* PERL_IMPLICIT_SYS */
208
209 /*
210 =for apidoc perl_construct
211
212 Initializes a new Perl interpreter. See L<perlembed>.
213
214 =cut
215 */
216
217 void
perl_construct(pTHXx)218 perl_construct(pTHXx)
219 {
220
221 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
222
223 #ifdef MULTIPLICITY
224 init_interp();
225 PL_perl_destruct_level = 1;
226 #else
227 PERL_UNUSED_ARG(my_perl);
228 if (PL_perl_destruct_level > 0)
229 init_interp();
230 #endif
231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
232
233 #ifdef PERL_TRACE_OPS
234 Zero(PL_op_exec_cnt, OP_max+2, UV);
235 #endif
236
237 init_constants();
238
239 SvREADONLY_on(&PL_sv_placeholder);
240 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
241
242 PL_sighandlerp = Perl_sighandler;
243 PL_sighandler1p = Perl_sighandler1;
244 PL_sighandler3p = Perl_sighandler3;
245
246 #ifdef PERL_USES_PL_PIDSTATUS
247 PL_pidstatus = newHV();
248 #endif
249
250 PL_rs = newSVpvs("\n");
251
252 init_stacks();
253
254 /* The PERL_INTERNAL_RAND_SEED set-up must be after init_stacks because it calls
255 * things that may put SVs on the stack.
256 */
257
258 #ifdef NO_PERL_INTERNAL_RAND_SEED
259 Perl_drand48_init_r(&PL_internal_random_state, seed());
260 #else
261 {
262 UV seed;
263 const char *env_pv;
264 if (PerlProc_getuid() != PerlProc_geteuid() ||
265 PerlProc_getgid() != PerlProc_getegid() ||
266 !(env_pv = PerlEnv_getenv("PERL_INTERNAL_RAND_SEED")) ||
267 grok_number(env_pv, strlen(env_pv), &seed) != IS_NUMBER_IN_UV) {
268 seed = seed();
269 }
270 Perl_drand48_init_r(&PL_internal_random_state, (U32)seed);
271 }
272 #endif
273
274 init_ids();
275
276 JMPENV_BOOTSTRAP;
277 STATUS_ALL_SUCCESS;
278
279 init_uniprops();
280 (void) uvchr_to_utf8_flags((U8 *) PL_TR_SPECIAL_HANDLING_UTF8,
281 TR_SPECIAL_HANDLING,
282 UNICODE_ALLOW_ABOVE_IV_MAX);
283
284 #if defined(LOCAL_PATCH_COUNT)
285 PL_localpatches = local_patches; /* For possible -v */
286 #endif
287
288 #if defined(LIBM_LIB_VERSION)
289 /*
290 * Some BSDs and Cygwin default to POSIX math instead of IEEE.
291 * This switches them over to IEEE.
292 */
293 _LIB_VERSION = _IEEE_;
294 #endif
295
296 #ifdef HAVE_INTERP_INTERN
297 sys_intern_init();
298 #endif
299
300 PerlIO_init(aTHX); /* Hook to IO system */
301
302 PL_fdpid = newAV(); /* for remembering popen pids by fd */
303 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
304 PL_errors = newSVpvs("");
305 SvPVCLEAR(PERL_DEBUG_PAD(0)); /* For regex debugging. */
306 SvPVCLEAR(PERL_DEBUG_PAD(1)); /* ext/re needs these */
307 SvPVCLEAR(PERL_DEBUG_PAD(2)); /* even without DEBUGGING. */
308 #ifdef USE_ITHREADS
309 /* First entry is a list of empty elements. It needs to be initialised
310 else all hell breaks loose in S_find_uninit_var(). */
311 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
312 PL_regex_pad = AvARRAY(PL_regex_padav);
313 Newxz(PL_stashpad, PL_stashpadmax, HV *);
314 #endif
315 #ifdef USE_REENTRANT_API
316 Perl_reentrant_init(aTHX);
317 #endif
318 if (PL_hash_seed_set == FALSE) {
319 /* Initialize the hash seed and state at startup. This must be
320 * done very early, before ANY hashes are constructed, and once
321 * setup is fixed for the lifetime of the process.
322 *
323 * If you decide to disable the seeding process you should choose
324 * a suitable seed yourself and define PERL_HASH_SEED to a well chosen
325 * string. See hv_func.h for details.
326 */
327 #if defined(USE_HASH_SEED)
328 /* get the hash seed from the environment or from an RNG */
329 Perl_get_hash_seed(aTHX_ PL_hash_seed);
330 #else
331 /* they want a hard coded seed, check that it is long enough */
332 assert( strlen(PERL_HASH_SEED) >= PERL_HASH_SEED_BYTES );
333 #endif
334
335 /* now we use the chosen seed to initialize the state -
336 * in some configurations this may be a relatively speaking
337 * expensive operation, but we only have to do it once at startup */
338 PERL_HASH_SEED_STATE(PERL_HASH_SEED,PL_hash_state);
339
340 #ifdef PERL_USE_SINGLE_CHAR_HASH_CACHE
341 /* we can build a special cache for 0/1 byte keys, if people choose
342 * I suspect most of the time it is not worth it */
343 {
344 char str[2]="\0";
345 int i;
346 for (i=0;i<256;i++) {
347 str[0]= i;
348 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[i],str,1);
349 }
350 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[256],str,0);
351 }
352 #endif
353 /* at this point we have initialezed the hash function, and we can start
354 * constructing hashes */
355 PL_hash_seed_set= TRUE;
356 }
357
358 /* Allow PL_strtab to be pre-initialized before calling perl_construct.
359 * can use a custom optimized PL_strtab hash before calling perl_construct */
360 if (!PL_strtab) {
361 /* Note that strtab is a rather special HV. Assumptions are made
362 about not iterating on it, and not adding tie magic to it.
363 It is properly deallocated in perl_destruct() */
364 PL_strtab = newHV();
365
366 /* SHAREKEYS tells us that the hash has its keys shared with PL_strtab,
367 * which is not the case with PL_strtab itself */
368 HvSHAREKEYS_off(PL_strtab); /* mandatory */
369 hv_ksplit(PL_strtab, 1 << 11);
370 }
371
372 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
373
374 #ifndef PERL_MICRO
375 # ifdef USE_ENVIRON_ARRAY
376 PL_origenviron = environ;
377 # endif
378 #endif
379
380 /* Use sysconf(_SC_CLK_TCK) if available, if not
381 * available or if the sysconf() fails, use the HZ.
382 * The HZ if not originally defined has been by now
383 * been defined as CLK_TCK, if available. */
384 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
385 PL_clocktick = sysconf(_SC_CLK_TCK);
386 if (PL_clocktick <= 0)
387 #endif
388 PL_clocktick = HZ;
389
390 PL_stashcache = newHV();
391
392 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
393
394 #ifdef HAS_MMAP
395 if (!PL_mmap_page_size) {
396 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
397 {
398 SETERRNO(0, SS_NORMAL);
399 # ifdef _SC_PAGESIZE
400 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
401 # else
402 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
403 # endif
404 if ((long) PL_mmap_page_size < 0) {
405 Perl_croak(aTHX_ "panic: sysconf: %s",
406 errno ? Strerror(errno) : "pagesize unknown");
407 }
408 }
409 #elif defined(HAS_GETPAGESIZE)
410 PL_mmap_page_size = getpagesize();
411 #elif defined(I_SYS_PARAM) && defined(PAGESIZE)
412 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
413 #endif
414 if (PL_mmap_page_size <= 0)
415 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
416 (IV) PL_mmap_page_size);
417 }
418 #endif /* HAS_MMAP */
419
420 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
421
422 PL_registered_mros = newHV();
423 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
424 HvMAX(PL_registered_mros) = 0;
425
426 #ifdef USE_POSIX_2008_LOCALE
427 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
428 #endif
429
430 ENTER;
431 init_i18nl10n(1);
432 }
433
434 /*
435 =for apidoc nothreadhook
436
437 Stub that provides thread hook for perl_destruct when there are
438 no threads.
439
440 =cut
441 */
442
443 int
Perl_nothreadhook(pTHX)444 Perl_nothreadhook(pTHX)
445 {
446 PERL_UNUSED_CONTEXT;
447 return 0;
448 }
449
450 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
451 void
Perl_dump_sv_child(pTHX_ SV * sv)452 Perl_dump_sv_child(pTHX_ SV *sv)
453 {
454 ssize_t got;
455 const int sock = PL_dumper_fd;
456 const int debug_fd = PerlIO_fileno(Perl_debug_log);
457 union control_un control;
458 struct msghdr msg;
459 struct iovec vec[2];
460 struct cmsghdr *cmptr;
461 int returned_errno;
462 unsigned char buffer[256];
463
464 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
465
466 if(sock == -1 || debug_fd == -1)
467 return;
468
469 PerlIO_flush(Perl_debug_log);
470
471 /* All these shenanigans are to pass a file descriptor over to our child for
472 it to dump out to. We can't let it hold open the file descriptor when it
473 forks, as the file descriptor it will dump to can turn out to be one end
474 of pipe that some other process will wait on for EOF. (So as it would
475 be open, the wait would be forever.) */
476
477 msg.msg_control = control.control;
478 msg.msg_controllen = sizeof(control.control);
479 /* We're a connected socket so we don't need a destination */
480 msg.msg_name = NULL;
481 msg.msg_namelen = 0;
482 msg.msg_iov = vec;
483 msg.msg_iovlen = 1;
484
485 cmptr = CMSG_FIRSTHDR(&msg);
486 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
487 cmptr->cmsg_level = SOL_SOCKET;
488 cmptr->cmsg_type = SCM_RIGHTS;
489 *((int *)CMSG_DATA(cmptr)) = 1;
490
491 vec[0].iov_base = (void*)&sv;
492 vec[0].iov_len = sizeof(sv);
493 got = sendmsg(sock, &msg, 0);
494
495 if(got < 0) {
496 perror("Debug leaking scalars parent sendmsg failed");
497 abort();
498 }
499 if(got < sizeof(sv)) {
500 perror("Debug leaking scalars parent short sendmsg");
501 abort();
502 }
503
504 /* Return protocol is
505 int: errno value
506 unsigned char: length of location string (0 for empty)
507 unsigned char*: string (not terminated)
508 */
509 vec[0].iov_base = (void*)&returned_errno;
510 vec[0].iov_len = sizeof(returned_errno);
511 vec[1].iov_base = buffer;
512 vec[1].iov_len = 1;
513
514 got = readv(sock, vec, 2);
515
516 if(got < 0) {
517 perror("Debug leaking scalars parent read failed");
518 PerlIO_flush(PerlIO_stderr());
519 abort();
520 }
521 if(got < sizeof(returned_errno) + 1) {
522 perror("Debug leaking scalars parent short read");
523 PerlIO_flush(PerlIO_stderr());
524 abort();
525 }
526
527 if (*buffer) {
528 got = read(sock, buffer + 1, *buffer);
529 if(got < 0) {
530 perror("Debug leaking scalars parent read 2 failed");
531 PerlIO_flush(PerlIO_stderr());
532 abort();
533 }
534
535 if(got < *buffer) {
536 perror("Debug leaking scalars parent short read 2");
537 PerlIO_flush(PerlIO_stderr());
538 abort();
539 }
540 }
541
542 if (returned_errno || *buffer) {
543 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
544 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
545 returned_errno, Strerror(returned_errno));
546 }
547 }
548 #endif
549
550 /*
551 =for apidoc perl_destruct
552
553 Shuts down a Perl interpreter. See L<perlembed> for a tutorial.
554
555 C<my_perl> points to the Perl interpreter. It must have been previously
556 created through the use of L</perl_alloc> and L</perl_construct>. It may
557 have been initialised through L</perl_parse>, and may have been used
558 through L</perl_run> and other means. This function should be called for
559 any Perl interpreter that has been constructed with L</perl_construct>,
560 even if subsequent operations on it failed, for example if L</perl_parse>
561 returned a non-zero value.
562
563 If the interpreter's C<PL_exit_flags> word has the
564 C<PERL_EXIT_DESTRUCT_END> flag set, then this function will execute code
565 in C<END> blocks before performing the rest of destruction. If it is
566 desired to make any use of the interpreter between L</perl_parse> and
567 L</perl_destruct> other than just calling L</perl_run>, then this flag
568 should be set early on. This matters if L</perl_run> will not be called,
569 or if anything else will be done in addition to calling L</perl_run>.
570
571 Returns a value be a suitable value to pass to the C library function
572 C<exit> (or to return from C<main>), to serve as an exit code indicating
573 the nature of the way the interpreter terminated. This takes into account
574 any failure of L</perl_parse> and any early exit from L</perl_run>.
575 The exit code is of the type required by the host operating system,
576 so because of differing exit code conventions it is not portable to
577 interpret specific numeric values as having specific meanings.
578
579 =cut
580 */
581
582 int
perl_destruct(pTHXx)583 perl_destruct(pTHXx)
584 {
585 volatile signed char destruct_level; /* see possible values in intrpvar.h */
586 HV *hv;
587 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
588 pid_t child;
589 #endif
590 int i;
591
592 PERL_ARGS_ASSERT_PERL_DESTRUCT;
593 #ifndef MULTIPLICITY
594 PERL_UNUSED_ARG(my_perl);
595 #endif
596
597 assert(PL_scopestack_ix == 1);
598
599 /* wait for all pseudo-forked children to finish */
600 PERL_WAIT_FOR_CHILDREN;
601
602 destruct_level = PL_perl_destruct_level;
603 {
604 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
605 if (s) {
606 int i;
607 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
608 i = -1;
609 } else {
610 UV uv;
611 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
612 i = (int)uv;
613 else
614 i = 0;
615 }
616 if (destruct_level < i) destruct_level = i;
617 #ifdef PERL_TRACK_MEMPOOL
618 /* RT #114496, for perl_free */
619 PL_perl_destruct_level = i;
620 #endif
621 }
622 }
623
624 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
625 dJMPENV;
626 int x = 0;
627
628 JMPENV_PUSH(x);
629 PERL_UNUSED_VAR(x);
630 if (PL_endav && !PL_minus_c) {
631 PERL_SET_PHASE(PERL_PHASE_END);
632 call_list(PL_scopestack_ix, PL_endav);
633 }
634 JMPENV_POP;
635 }
636 LEAVE;
637 FREETMPS;
638 assert(PL_scopestack_ix == 0);
639
640 /* normally when we get here, PL_parser should be null due to having
641 * its original (null) value restored by SAVEt_PARSER during leaving
642 * scope (usually before run-time starts in fact).
643 * But if a thread is created within a BEGIN block, the parser is
644 * duped, but the SAVEt_PARSER savestack entry isn't. So PL_parser
645 * never gets cleaned up.
646 * Clean it up here instead. This is a bit of a hack.
647 */
648 if (PL_parser) {
649 /* stop parser_free() stomping on PL_curcop */
650 PL_parser->saved_curcop = PL_curcop;
651 parser_free(PL_parser);
652 }
653
654
655 /* Need to flush since END blocks can produce output */
656 /* flush stdout separately, since we can identify it */
657 #ifdef USE_PERLIO
658 {
659 PerlIO *stdo = PerlIO_stdout();
660 if (*stdo && PerlIO_flush(stdo)) {
661 PerlIO_restore_errno(stdo);
662 if (errno)
663 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s\n",
664 Strerror(errno));
665 if (!STATUS_UNIX)
666 STATUS_ALL_FAILURE;
667 }
668 }
669 #endif
670 my_fflush_all();
671
672 #ifdef PERL_TRACE_OPS
673 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
674 {
675 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
676 UV uv;
677
678 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
679 || !(uv > 0))
680 goto no_trace_out;
681 }
682 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
683 for (i = 0; i <= OP_max; ++i) {
684 if (PL_op_exec_cnt[i])
685 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
686 }
687 /* Utility slot for easily doing little tracing experiments in the runloop: */
688 if (PL_op_exec_cnt[OP_max+1] != 0)
689 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
690 PerlIO_printf(Perl_debug_log, "\n");
691 no_trace_out:
692 #endif
693
694
695 if (PL_threadhook(aTHX)) {
696 /* Threads hook has vetoed further cleanup */
697 PL_veto_cleanup = TRUE;
698 return STATUS_EXIT;
699 }
700
701 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
702 if (destruct_level != 0) {
703 /* Fork here to create a child. Our child's job is to preserve the
704 state of scalars prior to destruction, so that we can instruct it
705 to dump any scalars that we later find have leaked.
706 There's no subtlety in this code - it assumes POSIX, and it doesn't
707 fail gracefully */
708 int fd[2];
709
710 if(PerlSock_socketpair_cloexec(AF_UNIX, SOCK_STREAM, 0, fd)) {
711 perror("Debug leaking scalars socketpair failed");
712 abort();
713 }
714
715 child = fork();
716 if(child == -1) {
717 perror("Debug leaking scalars fork failed");
718 abort();
719 }
720 if (!child) {
721 /* We are the child */
722 const int sock = fd[1];
723 const int debug_fd = PerlIO_fileno(Perl_debug_log);
724 int f;
725 const char *where;
726 /* Our success message is an integer 0, and a char 0 */
727 static const char success[sizeof(int) + 1] = {0};
728
729 close(fd[0]);
730
731 /* We need to close all other file descriptors otherwise we end up
732 with interesting hangs, where the parent closes its end of a
733 pipe, and sits waiting for (another) child to terminate. Only
734 that child never terminates, because it never gets EOF, because
735 we also have the far end of the pipe open. We even need to
736 close the debugging fd, because sometimes it happens to be one
737 end of a pipe, and a process is waiting on the other end for
738 EOF. Normally it would be closed at some point earlier in
739 destruction, but if we happen to cause the pipe to remain open,
740 EOF never occurs, and we get an infinite hang. Hence all the
741 games to pass in a file descriptor if it's actually needed. */
742
743 f = sysconf(_SC_OPEN_MAX);
744 if(f < 0) {
745 where = "sysconf failed";
746 goto abort;
747 }
748 while (f--) {
749 if (f == sock)
750 continue;
751 close(f);
752 }
753
754 while (1) {
755 SV *target;
756 union control_un control;
757 struct msghdr msg;
758 struct iovec vec[1];
759 struct cmsghdr *cmptr;
760 ssize_t got;
761 int got_fd;
762
763 msg.msg_control = control.control;
764 msg.msg_controllen = sizeof(control.control);
765 /* We're a connected socket so we don't need a source */
766 msg.msg_name = NULL;
767 msg.msg_namelen = 0;
768 msg.msg_iov = vec;
769 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
770
771 vec[0].iov_base = (void*)⌖
772 vec[0].iov_len = sizeof(target);
773
774 got = recvmsg(sock, &msg, 0);
775
776 if(got == 0)
777 break;
778 if(got < 0) {
779 where = "recv failed";
780 goto abort;
781 }
782 if(got < sizeof(target)) {
783 where = "short recv";
784 goto abort;
785 }
786
787 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
788 where = "no cmsg";
789 goto abort;
790 }
791 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
792 where = "wrong cmsg_len";
793 goto abort;
794 }
795 if(cmptr->cmsg_level != SOL_SOCKET) {
796 where = "wrong cmsg_level";
797 goto abort;
798 }
799 if(cmptr->cmsg_type != SCM_RIGHTS) {
800 where = "wrong cmsg_type";
801 goto abort;
802 }
803
804 got_fd = *(int*)CMSG_DATA(cmptr);
805 /* For our last little bit of trickery, put the file descriptor
806 back into Perl_debug_log, as if we never actually closed it
807 */
808 if(got_fd != debug_fd) {
809 if (PerlLIO_dup2_cloexec(got_fd, debug_fd) == -1) {
810 where = "dup2";
811 goto abort;
812 }
813 }
814 sv_dump(target);
815
816 PerlIO_flush(Perl_debug_log);
817
818 got = write(sock, &success, sizeof(success));
819
820 if(got < 0) {
821 where = "write failed";
822 goto abort;
823 }
824 if(got < sizeof(success)) {
825 where = "short write";
826 goto abort;
827 }
828 }
829 _exit(0);
830 abort:
831 {
832 int send_errno = errno;
833 unsigned char length = (unsigned char) strlen(where);
834 struct iovec failure[3] = {
835 {(void*)&send_errno, sizeof(send_errno)},
836 {&length, 1},
837 {(void*)where, length}
838 };
839 int got = writev(sock, failure, 3);
840 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
841 in the parent if we try to read from the socketpair after the
842 child has exited, even if there was data to read.
843 So sleep a bit to give the parent a fighting chance of
844 reading the data. */
845 sleep(2);
846 _exit((got == -1) ? errno : 0);
847 }
848 /* End of child. */
849 }
850 PL_dumper_fd = fd[0];
851 close(fd[1]);
852 }
853 #endif
854
855 /* We must account for everything. */
856
857 /* Destroy the main CV and syntax tree */
858 /* Set PL_curcop now, because destroying ops can cause new SVs
859 to be generated in Perl_pad_swipe, and when running with
860 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
861 op from which the filename structure member is copied. */
862 PL_curcop = &PL_compiling;
863 if (PL_main_root) {
864 /* ensure comppad/curpad to refer to main's pad */
865 if (CvPADLIST(PL_main_cv)) {
866 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
867 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
868 }
869 op_free(PL_main_root);
870 PL_main_root = NULL;
871 }
872 PL_main_start = NULL;
873 /* note that PL_main_cv isn't usually actually freed at this point,
874 * due to the CvOUTSIDE refs from subs compiled within it. It will
875 * get freed once all the subs are freed in sv_clean_all(), for
876 * destruct_level > 0 */
877 SvREFCNT_dec(PL_main_cv);
878 PL_main_cv = NULL;
879 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
880
881 /* Tell PerlIO we are about to tear things apart in case
882 we have layers which are using resources that should
883 be cleaned up now.
884 */
885
886 PerlIO_destruct(aTHX);
887
888 /*
889 * Try to destruct global references. We do this first so that the
890 * destructors and destructees still exist. Some sv's might remain.
891 * Non-referenced objects are on their own.
892 */
893 sv_clean_objs();
894
895 /* unhook hooks which will soon be, or use, destroyed data */
896 SvREFCNT_dec(PL_warnhook);
897 PL_warnhook = NULL;
898 SvREFCNT_dec(PL_diehook);
899 PL_diehook = NULL;
900
901 /* call exit list functions */
902 while (PL_exitlistlen-- > 0)
903 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
904
905 Safefree(PL_exitlist);
906
907 PL_exitlist = NULL;
908 PL_exitlistlen = 0;
909
910 SvREFCNT_dec(PL_registered_mros);
911
912 /* jettison our possibly duplicated environment */
913 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
914 * so we certainly shouldn't free it here
915 */
916 #ifndef PERL_MICRO
917 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
918 if (environ != PL_origenviron && !PL_use_safe_putenv
919 #ifdef USE_ITHREADS
920 /* only main thread can free environ[0] contents */
921 && PL_curinterp == aTHX
922 #endif
923 )
924 {
925 I32 i;
926
927 for (i = 0; environ[i]; i++)
928 safesysfree(environ[i]);
929
930 /* Must use safesysfree() when working with environ. */
931 safesysfree(environ);
932
933 environ = PL_origenviron;
934 }
935 #endif
936 #endif /* !PERL_MICRO */
937
938 if (destruct_level == 0) {
939
940 DEBUG_P(debprofdump());
941
942 #if defined(PERLIO_LAYERS)
943 /* No more IO - including error messages ! */
944 PerlIO_cleanup(aTHX);
945 #endif
946
947 CopFILE_free(&PL_compiling);
948
949 /* The exit() function will do everything that needs doing. */
950 return STATUS_EXIT;
951 }
952
953 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
954
955 #ifdef USE_ITHREADS
956 /* the syntax tree is shared between clones
957 * so op_free(PL_main_root) only ReREFCNT_dec's
958 * REGEXPs in the parent interpreter
959 * we need to manually ReREFCNT_dec for the clones
960 */
961 {
962 I32 i = AvFILLp(PL_regex_padav);
963 SV **ary = AvARRAY(PL_regex_padav);
964
965 for (; i; i--) {
966 SvREFCNT_dec(ary[i]);
967 ary[i] = &PL_sv_undef;
968 }
969 }
970 #endif
971
972
973 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
974 PL_stashcache = NULL;
975
976 /* loosen bonds of global variables */
977
978 /* XXX can PL_parser still be non-null here? */
979 if(PL_parser && PL_parser->rsfp) {
980 (void)PerlIO_close(PL_parser->rsfp);
981 PL_parser->rsfp = NULL;
982 }
983
984 if (PL_minus_F) {
985 Safefree(PL_splitstr);
986 PL_splitstr = NULL;
987 }
988
989 /* switches */
990 PL_minus_n = FALSE;
991 PL_minus_p = FALSE;
992 PL_minus_l = FALSE;
993 PL_minus_a = FALSE;
994 PL_minus_F = FALSE;
995 PL_doswitches = FALSE;
996 PL_dowarn = G_WARN_OFF;
997 #ifdef PERL_SAWAMPERSAND
998 PL_sawampersand = 0; /* must save all match strings */
999 #endif
1000 PL_unsafe = FALSE;
1001
1002 Safefree(PL_inplace);
1003 PL_inplace = NULL;
1004 SvREFCNT_dec(PL_patchlevel);
1005
1006 if (PL_e_script) {
1007 SvREFCNT_dec(PL_e_script);
1008 PL_e_script = NULL;
1009 }
1010
1011 PL_perldb = 0;
1012
1013 /* magical thingies */
1014
1015 SvREFCNT_dec(PL_ofsgv); /* *, */
1016 PL_ofsgv = NULL;
1017
1018 SvREFCNT_dec(PL_ors_sv); /* $\ */
1019 PL_ors_sv = NULL;
1020
1021 SvREFCNT_dec(PL_rs); /* $/ */
1022 PL_rs = NULL;
1023
1024 Safefree(PL_osname); /* $^O */
1025 PL_osname = NULL;
1026
1027 SvREFCNT_dec(PL_statname);
1028 PL_statname = NULL;
1029 PL_statgv = NULL;
1030
1031 /* defgv, aka *_ should be taken care of elsewhere */
1032
1033 /* float buffer */
1034 Safefree(PL_efloatbuf);
1035 PL_efloatbuf = NULL;
1036 PL_efloatsize = 0;
1037
1038 /* startup and shutdown function lists */
1039 SvREFCNT_dec(PL_beginav);
1040 SvREFCNT_dec(PL_beginav_save);
1041 SvREFCNT_dec(PL_endav);
1042 SvREFCNT_dec(PL_checkav);
1043 SvREFCNT_dec(PL_checkav_save);
1044 SvREFCNT_dec(PL_unitcheckav);
1045 SvREFCNT_dec(PL_unitcheckav_save);
1046 SvREFCNT_dec(PL_initav);
1047 PL_beginav = NULL;
1048 PL_beginav_save = NULL;
1049 PL_endav = NULL;
1050 PL_checkav = NULL;
1051 PL_checkav_save = NULL;
1052 PL_unitcheckav = NULL;
1053 PL_unitcheckav_save = NULL;
1054 PL_initav = NULL;
1055
1056 /* shortcuts just get cleared */
1057 PL_hintgv = NULL;
1058 PL_errgv = NULL;
1059 PL_argvoutgv = NULL;
1060 PL_stdingv = NULL;
1061 PL_stderrgv = NULL;
1062 PL_last_in_gv = NULL;
1063 PL_DBsingle = NULL;
1064 PL_DBtrace = NULL;
1065 PL_DBsignal = NULL;
1066 PL_DBsingle_iv = 0;
1067 PL_DBtrace_iv = 0;
1068 PL_DBsignal_iv = 0;
1069 PL_DBcv = NULL;
1070 PL_dbargs = NULL;
1071 PL_debstash = NULL;
1072
1073 SvREFCNT_dec(PL_envgv);
1074 SvREFCNT_dec(PL_incgv);
1075 SvREFCNT_dec(PL_argvgv);
1076 SvREFCNT_dec(PL_replgv);
1077 SvREFCNT_dec(PL_DBgv);
1078 SvREFCNT_dec(PL_DBline);
1079 SvREFCNT_dec(PL_DBsub);
1080 PL_envgv = NULL;
1081 PL_incgv = NULL;
1082 PL_argvgv = NULL;
1083 PL_replgv = NULL;
1084 PL_DBgv = NULL;
1085 PL_DBline = NULL;
1086 PL_DBsub = NULL;
1087
1088 SvREFCNT_dec(PL_argvout_stack);
1089 PL_argvout_stack = NULL;
1090
1091 SvREFCNT_dec(PL_modglobal);
1092 PL_modglobal = NULL;
1093 SvREFCNT_dec(PL_preambleav);
1094 PL_preambleav = NULL;
1095 SvREFCNT_dec(PL_subname);
1096 PL_subname = NULL;
1097 #ifdef PERL_USES_PL_PIDSTATUS
1098 SvREFCNT_dec(PL_pidstatus);
1099 PL_pidstatus = NULL;
1100 #endif
1101 SvREFCNT_dec(PL_toptarget);
1102 PL_toptarget = NULL;
1103 SvREFCNT_dec(PL_bodytarget);
1104 PL_bodytarget = NULL;
1105 PL_formtarget = NULL;
1106
1107 /* free locale stuff */
1108 #ifdef USE_LOCALE_COLLATE
1109 Safefree(PL_collation_name);
1110 PL_collation_name = NULL;
1111 #endif
1112 #if defined(USE_POSIX_2008_LOCALE) \
1113 && defined(USE_THREAD_SAFE_LOCALE) \
1114 && ! defined(HAS_QUERYLOCALE)
1115 for (i = 0; i < (int) C_ARRAY_LENGTH(PL_curlocales); i++) {
1116 Safefree(PL_curlocales[i]);
1117 PL_curlocales[i] = NULL;
1118 }
1119 #endif
1120 #ifdef HAS_POSIX_2008_LOCALE
1121 {
1122 /* This also makes sure we aren't using a locale object that gets freed
1123 * below */
1124 const locale_t old_locale = uselocale(LC_GLOBAL_LOCALE);
1125 if ( old_locale != LC_GLOBAL_LOCALE
1126 # ifdef USE_POSIX_2008_LOCALE
1127 && old_locale != PL_C_locale_obj
1128 # endif
1129 ) {
1130 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1131 "%s:%d: Freeing %p\n", __FILE__, __LINE__, old_locale));
1132 freelocale(old_locale);
1133 }
1134 }
1135 # ifdef USE_LOCALE_NUMERIC
1136 if (PL_underlying_numeric_obj) {
1137 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1138 "%s:%d: Freeing %p\n", __FILE__, __LINE__,
1139 PL_underlying_numeric_obj));
1140 freelocale(PL_underlying_numeric_obj);
1141 PL_underlying_numeric_obj = (locale_t) NULL;
1142 }
1143 # endif
1144 #endif
1145 #ifdef USE_LOCALE_NUMERIC
1146 Safefree(PL_numeric_name);
1147 PL_numeric_name = NULL;
1148 SvREFCNT_dec(PL_numeric_radix_sv);
1149 PL_numeric_radix_sv = NULL;
1150 #endif
1151
1152 if (PL_setlocale_buf) {
1153 Safefree(PL_setlocale_buf);
1154 PL_setlocale_buf = NULL;
1155 }
1156
1157 if (PL_langinfo_buf) {
1158 Safefree(PL_langinfo_buf);
1159 PL_langinfo_buf = NULL;
1160 }
1161
1162 #ifdef USE_LOCALE_CTYPE
1163 SvREFCNT_dec(PL_warn_locale);
1164 PL_warn_locale = NULL;
1165 #endif
1166
1167 SvREFCNT_dec(PL_AboveLatin1);
1168 PL_AboveLatin1 = NULL;
1169 SvREFCNT_dec(PL_Assigned_invlist);
1170 PL_Assigned_invlist = NULL;
1171 SvREFCNT_dec(PL_GCB_invlist);
1172 PL_GCB_invlist = NULL;
1173 SvREFCNT_dec(PL_HasMultiCharFold);
1174 PL_HasMultiCharFold = NULL;
1175 SvREFCNT_dec(PL_InMultiCharFold);
1176 PL_InMultiCharFold = NULL;
1177 SvREFCNT_dec(PL_Latin1);
1178 PL_Latin1 = NULL;
1179 SvREFCNT_dec(PL_LB_invlist);
1180 PL_LB_invlist = NULL;
1181 SvREFCNT_dec(PL_SB_invlist);
1182 PL_SB_invlist = NULL;
1183 SvREFCNT_dec(PL_SCX_invlist);
1184 PL_SCX_invlist = NULL;
1185 SvREFCNT_dec(PL_UpperLatin1);
1186 PL_UpperLatin1 = NULL;
1187 SvREFCNT_dec(PL_in_some_fold);
1188 PL_in_some_fold = NULL;
1189 SvREFCNT_dec(PL_utf8_foldclosures);
1190 PL_utf8_foldclosures = NULL;
1191 SvREFCNT_dec(PL_utf8_idcont);
1192 PL_utf8_idcont = NULL;
1193 SvREFCNT_dec(PL_utf8_idstart);
1194 PL_utf8_idstart = NULL;
1195 SvREFCNT_dec(PL_utf8_perl_idcont);
1196 PL_utf8_perl_idcont = NULL;
1197 SvREFCNT_dec(PL_utf8_perl_idstart);
1198 PL_utf8_perl_idstart = NULL;
1199 SvREFCNT_dec(PL_utf8_xidcont);
1200 PL_utf8_xidcont = NULL;
1201 SvREFCNT_dec(PL_utf8_xidstart);
1202 PL_utf8_xidstart = NULL;
1203 SvREFCNT_dec(PL_WB_invlist);
1204 PL_WB_invlist = NULL;
1205 SvREFCNT_dec(PL_utf8_toupper);
1206 PL_utf8_toupper = NULL;
1207 SvREFCNT_dec(PL_utf8_totitle);
1208 PL_utf8_totitle = NULL;
1209 SvREFCNT_dec(PL_utf8_tolower);
1210 PL_utf8_tolower = NULL;
1211 SvREFCNT_dec(PL_utf8_tofold);
1212 PL_utf8_tofold = NULL;
1213 SvREFCNT_dec(PL_utf8_tosimplefold);
1214 PL_utf8_tosimplefold = NULL;
1215 SvREFCNT_dec(PL_utf8_charname_begin);
1216 PL_utf8_charname_begin = NULL;
1217 SvREFCNT_dec(PL_utf8_charname_continue);
1218 PL_utf8_charname_continue = NULL;
1219 SvREFCNT_dec(PL_utf8_mark);
1220 PL_utf8_mark = NULL;
1221 SvREFCNT_dec(PL_InBitmap);
1222 PL_InBitmap = NULL;
1223 SvREFCNT_dec(PL_CCC_non0_non230);
1224 PL_CCC_non0_non230 = NULL;
1225 SvREFCNT_dec(PL_Private_Use);
1226 PL_Private_Use = NULL;
1227
1228 for (i = 0; i < POSIX_CC_COUNT; i++) {
1229 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1230 PL_XPosix_ptrs[i] = NULL;
1231
1232 if (i != _CC_CASED) { /* A copy of Alpha */
1233 SvREFCNT_dec(PL_Posix_ptrs[i]);
1234 PL_Posix_ptrs[i] = NULL;
1235 }
1236 }
1237
1238 free_and_set_cop_warnings(&PL_compiling, NULL);
1239 cophh_free(CopHINTHASH_get(&PL_compiling));
1240 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1241 CopFILE_free(&PL_compiling);
1242
1243 /* Prepare to destruct main symbol table. */
1244
1245 hv = PL_defstash;
1246 /* break ref loop *:: <=> %:: */
1247 (void)hv_deletes(hv, "main::", G_DISCARD);
1248 PL_defstash = 0;
1249 SvREFCNT_dec(hv);
1250 SvREFCNT_dec(PL_curstname);
1251 PL_curstname = NULL;
1252
1253 /* clear queued errors */
1254 SvREFCNT_dec(PL_errors);
1255 PL_errors = NULL;
1256
1257 SvREFCNT_dec(PL_isarev);
1258
1259 FREETMPS;
1260 if (destruct_level >= 2) {
1261 if (PL_scopestack_ix != 0)
1262 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1263 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1264 (long)PL_scopestack_ix);
1265 if (PL_savestack_ix != 0)
1266 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1267 "Unbalanced saves: %ld more saves than restores\n",
1268 (long)PL_savestack_ix);
1269 if (PL_tmps_floor != -1)
1270 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1271 (long)PL_tmps_floor + 1);
1272 if (cxstack_ix != -1)
1273 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1274 (long)cxstack_ix + 1);
1275 }
1276
1277 #ifdef USE_ITHREADS
1278 SvREFCNT_dec(PL_regex_padav);
1279 PL_regex_padav = NULL;
1280 PL_regex_pad = NULL;
1281 #endif
1282
1283 #ifdef PERL_IMPLICIT_CONTEXT
1284 /* the entries in this list are allocated via SV PVX's, so get freed
1285 * in sv_clean_all */
1286 Safefree(PL_my_cxt_list);
1287 #endif
1288
1289 /* Now absolutely destruct everything, somehow or other, loops or no. */
1290
1291 /* the 2 is for PL_fdpid and PL_strtab */
1292 while (sv_clean_all() > 2)
1293 ;
1294
1295 #ifdef USE_ITHREADS
1296 Safefree(PL_stashpad); /* must come after sv_clean_all */
1297 #endif
1298
1299 AvREAL_off(PL_fdpid); /* no surviving entries */
1300 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1301 PL_fdpid = NULL;
1302
1303 #ifdef HAVE_INTERP_INTERN
1304 sys_intern_clear();
1305 #endif
1306
1307 /* constant strings */
1308 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1309 SvREFCNT_dec(PL_sv_consts[i]);
1310 PL_sv_consts[i] = NULL;
1311 }
1312
1313 /* Destruct the global string table. */
1314 {
1315 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1316 * so that sv_free() won't fail on them.
1317 * Now that the global string table is using a single hunk of memory
1318 * for both HE and HEK, we either need to explicitly unshare it the
1319 * correct way, or actually free things here.
1320 */
1321 I32 riter = 0;
1322 const I32 max = HvMAX(PL_strtab);
1323 HE * const * const array = HvARRAY(PL_strtab);
1324 HE *hent = array[0];
1325
1326 for (;;) {
1327 if (hent && ckWARN_d(WARN_INTERNAL)) {
1328 HE * const next = HeNEXT(hent);
1329 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1330 "Unbalanced string table refcount: (%ld) for \"%s\"",
1331 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1332 Safefree(hent);
1333 hent = next;
1334 }
1335 if (!hent) {
1336 if (++riter > max)
1337 break;
1338 hent = array[riter];
1339 }
1340 }
1341
1342 Safefree(array);
1343 HvARRAY(PL_strtab) = 0;
1344 HvTOTALKEYS(PL_strtab) = 0;
1345 }
1346 SvREFCNT_dec(PL_strtab);
1347
1348 #ifdef USE_ITHREADS
1349 /* free the pointer tables used for cloning */
1350 ptr_table_free(PL_ptr_table);
1351 PL_ptr_table = (PTR_TBL_t*)NULL;
1352 #endif
1353
1354 /* free special SVs */
1355
1356 SvREFCNT(&PL_sv_yes) = 0;
1357 sv_clear(&PL_sv_yes);
1358 SvANY(&PL_sv_yes) = NULL;
1359 SvFLAGS(&PL_sv_yes) = 0;
1360
1361 SvREFCNT(&PL_sv_no) = 0;
1362 sv_clear(&PL_sv_no);
1363 SvANY(&PL_sv_no) = NULL;
1364 SvFLAGS(&PL_sv_no) = 0;
1365
1366 SvREFCNT(&PL_sv_zero) = 0;
1367 sv_clear(&PL_sv_zero);
1368 SvANY(&PL_sv_zero) = NULL;
1369 SvFLAGS(&PL_sv_zero) = 0;
1370
1371 {
1372 int i;
1373 for (i=0; i<=2; i++) {
1374 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1375 sv_clear(PERL_DEBUG_PAD(i));
1376 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1377 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1378 }
1379 }
1380
1381 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1382 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1383
1384 #ifdef DEBUG_LEAKING_SCALARS
1385 if (PL_sv_count != 0) {
1386 SV* sva;
1387 SV* sv;
1388 SV* svend;
1389
1390 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1391 svend = &sva[SvREFCNT(sva)];
1392 for (sv = sva + 1; sv < svend; ++sv) {
1393 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1394 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1395 " flags=0x%" UVxf
1396 " refcnt=%" UVuf pTHX__FORMAT "\n"
1397 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1398 "serial %" UVuf "\n",
1399 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1400 pTHX__VALUE,
1401 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1402 sv->sv_debug_line,
1403 sv->sv_debug_inpad ? "for" : "by",
1404 sv->sv_debug_optype ?
1405 PL_op_name[sv->sv_debug_optype]: "(none)",
1406 PTR2UV(sv->sv_debug_parent),
1407 sv->sv_debug_serial
1408 );
1409 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1410 Perl_dump_sv_child(aTHX_ sv);
1411 #endif
1412 }
1413 }
1414 }
1415 }
1416 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1417 {
1418 int status;
1419 fd_set rset;
1420 /* Wait for up to 4 seconds for child to terminate.
1421 This seems to be the least effort way of timing out on reaping
1422 its exit status. */
1423 struct timeval waitfor = {4, 0};
1424 int sock = PL_dumper_fd;
1425
1426 shutdown(sock, 1);
1427 FD_ZERO(&rset);
1428 FD_SET(sock, &rset);
1429 select(sock + 1, &rset, NULL, NULL, &waitfor);
1430 waitpid(child, &status, WNOHANG);
1431 close(sock);
1432 }
1433 #endif
1434 #endif
1435 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1436 if (PL_sv_count)
1437 abort();
1438 #endif
1439 PL_sv_count = 0;
1440
1441 #if defined(PERLIO_LAYERS)
1442 /* No more IO - including error messages ! */
1443 PerlIO_cleanup(aTHX);
1444 #endif
1445
1446 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1447 as currently layers use it rather than NULL as a marker
1448 for no arg - and will try and SvREFCNT_dec it.
1449 */
1450 SvREFCNT(&PL_sv_undef) = 0;
1451 SvREADONLY_off(&PL_sv_undef);
1452
1453 Safefree(PL_origfilename);
1454 PL_origfilename = NULL;
1455 Safefree(PL_reg_curpm);
1456 free_tied_hv_pool();
1457 Safefree(PL_op_mask);
1458 Safefree(PL_psig_name);
1459 PL_psig_name = (SV**)NULL;
1460 PL_psig_ptr = (SV**)NULL;
1461 {
1462 /* We need to NULL PL_psig_pend first, so that
1463 signal handlers know not to use it */
1464 int *psig_save = PL_psig_pend;
1465 PL_psig_pend = (int*)NULL;
1466 Safefree(psig_save);
1467 }
1468 nuke_stacks();
1469 TAINTING_set(FALSE);
1470 TAINT_WARN_set(FALSE);
1471 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1472
1473 DEBUG_P(debprofdump());
1474
1475 PL_debug = 0;
1476
1477 #ifdef USE_REENTRANT_API
1478 Perl_reentrant_free(aTHX);
1479 #endif
1480
1481 /* These all point to HVs that are about to be blown away.
1482 Code in core and on CPAN assumes that if the interpreter is re-started
1483 that they will be cleanly NULL or pointing to a valid HV. */
1484 PL_custom_op_names = NULL;
1485 PL_custom_op_descs = NULL;
1486 PL_custom_ops = NULL;
1487
1488 sv_free_arenas();
1489
1490 while (PL_regmatch_slab) {
1491 regmatch_slab *s = PL_regmatch_slab;
1492 PL_regmatch_slab = PL_regmatch_slab->next;
1493 Safefree(s);
1494 }
1495
1496 /* As the absolutely last thing, free the non-arena SV for mess() */
1497
1498 if (PL_mess_sv) {
1499 /* we know that type == SVt_PVMG */
1500
1501 /* it could have accumulated taint magic */
1502 MAGIC* mg;
1503 MAGIC* moremagic;
1504 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1505 moremagic = mg->mg_moremagic;
1506 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1507 && mg->mg_len >= 0)
1508 Safefree(mg->mg_ptr);
1509 Safefree(mg);
1510 }
1511
1512 /* we know that type >= SVt_PV */
1513 SvPV_free(PL_mess_sv);
1514 Safefree(SvANY(PL_mess_sv));
1515 Safefree(PL_mess_sv);
1516 PL_mess_sv = NULL;
1517 }
1518 return STATUS_EXIT;
1519 }
1520
1521 /*
1522 =for apidoc perl_free
1523
1524 Releases a Perl interpreter. See L<perlembed>.
1525
1526 =cut
1527 */
1528
1529 void
perl_free(pTHXx)1530 perl_free(pTHXx)
1531 {
1532
1533 PERL_ARGS_ASSERT_PERL_FREE;
1534
1535 if (PL_veto_cleanup)
1536 return;
1537
1538 #ifdef PERL_TRACK_MEMPOOL
1539 {
1540 /*
1541 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1542 * value as we're probably hunting memory leaks then
1543 */
1544 if (PL_perl_destruct_level == 0) {
1545 const U32 old_debug = PL_debug;
1546 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1547 thread at thread exit. */
1548 if (DEBUG_m_TEST) {
1549 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1550 "free this thread's memory\n");
1551 PL_debug &= ~ DEBUG_m_FLAG;
1552 }
1553 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1554 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1555 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1556 safesysfree(ptr);
1557 }
1558 PL_debug = old_debug;
1559 }
1560 }
1561 #endif
1562
1563 #if defined(WIN32) || defined(NETWARE)
1564 # if defined(PERL_IMPLICIT_SYS)
1565 {
1566 # ifdef NETWARE
1567 void *host = nw_internal_host;
1568 PerlMem_free(aTHXx);
1569 nw_delete_internal_host(host);
1570 # else
1571 void *host = w32_internal_host;
1572 PerlMem_free(aTHXx);
1573 win32_delete_internal_host(host);
1574 # endif
1575 }
1576 # else
1577 PerlMem_free(aTHXx);
1578 # endif
1579 #else
1580 PerlMem_free(aTHXx);
1581 #endif
1582 }
1583
1584 #if defined(USE_ITHREADS)
1585 /* provide destructors to clean up the thread key when libperl is unloaded */
1586 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1587
1588 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1589 #pragma fini "perl_fini"
1590 #elif defined(__sun) && !defined(__GNUC__)
1591 #pragma fini (perl_fini)
1592 #endif
1593
1594 static void
1595 #if defined(__GNUC__)
1596 __attribute__((destructor))
1597 #endif
perl_fini(void)1598 perl_fini(void)
1599 {
1600 if (
1601 PL_curinterp && !PL_veto_cleanup)
1602 FREE_THREAD_KEY;
1603 }
1604
1605 #endif /* WIN32 */
1606 #endif /* THREADS */
1607
1608 void
Perl_call_atexit(pTHX_ ATEXIT_t fn,void * ptr)1609 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1610 {
1611 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1612 PL_exitlist[PL_exitlistlen].fn = fn;
1613 PL_exitlist[PL_exitlistlen].ptr = ptr;
1614 ++PL_exitlistlen;
1615 }
1616
1617 /*
1618 =for apidoc perl_parse
1619
1620 Tells a Perl interpreter to parse a Perl script. This performs most
1621 of the initialisation of a Perl interpreter. See L<perlembed> for
1622 a tutorial.
1623
1624 C<my_perl> points to the Perl interpreter that is to parse the script.
1625 It must have been previously created through the use of L</perl_alloc>
1626 and L</perl_construct>. C<xsinit> points to a callback function that
1627 will be called to set up the ability for this Perl interpreter to load
1628 XS extensions, or may be null to perform no such setup.
1629
1630 C<argc> and C<argv> supply a set of command-line arguments to the Perl
1631 interpreter, as would normally be passed to the C<main> function of
1632 a C program. C<argv[argc]> must be null. These arguments are where
1633 the script to parse is specified, either by naming a script file or by
1634 providing a script in a C<-e> option.
1635 If L<C<$0>|perlvar/$0> will be written to in the Perl interpreter, then
1636 the argument strings must be in writable memory, and so mustn't just be
1637 string constants.
1638
1639 C<env> specifies a set of environment variables that will be used by
1640 this Perl interpreter. If non-null, it must point to a null-terminated
1641 array of environment strings. If null, the Perl interpreter will use
1642 the environment supplied by the C<environ> global variable.
1643
1644 This function initialises the interpreter, and parses and compiles the
1645 script specified by the command-line arguments. This includes executing
1646 code in C<BEGIN>, C<UNITCHECK>, and C<CHECK> blocks. It does not execute
1647 C<INIT> blocks or the main program.
1648
1649 Returns an integer of slightly tricky interpretation. The correct
1650 use of the return value is as a truth value indicating whether there
1651 was a failure in initialisation. If zero is returned, this indicates
1652 that initialisation was successful, and it is safe to proceed to call
1653 L</perl_run> and make other use of it. If a non-zero value is returned,
1654 this indicates some problem that means the interpreter wants to terminate.
1655 The interpreter should not be just abandoned upon such failure; the caller
1656 should proceed to shut the interpreter down cleanly with L</perl_destruct>
1657 and free it with L</perl_free>.
1658
1659 For historical reasons, the non-zero return value also attempts to
1660 be a suitable value to pass to the C library function C<exit> (or to
1661 return from C<main>), to serve as an exit code indicating the nature
1662 of the way initialisation terminated. However, this isn't portable,
1663 due to differing exit code conventions. A historical bug is preserved
1664 for the time being: if the Perl built-in C<exit> is called during this
1665 function's execution, with a type of exit entailing a zero exit code
1666 under the host operating system's conventions, then this function
1667 returns zero rather than a non-zero value. This bug, [perl #2754],
1668 leads to C<perl_run> being called (and therefore C<INIT> blocks and the
1669 main program running) despite a call to C<exit>. It has been preserved
1670 because a popular module-installing module has come to rely on it and
1671 needs time to be fixed. This issue is [perl #132577], and the original
1672 bug is due to be fixed in Perl 5.30.
1673
1674 =cut
1675 */
1676
1677 #define SET_CURSTASH(newstash) \
1678 if (PL_curstash != newstash) { \
1679 SvREFCNT_dec(PL_curstash); \
1680 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1681 }
1682
1683 int
perl_parse(pTHXx_ XSINIT_t xsinit,int argc,char ** argv,char ** env)1684 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1685 {
1686 I32 oldscope;
1687 int ret;
1688 dJMPENV;
1689
1690 PERL_ARGS_ASSERT_PERL_PARSE;
1691 #ifndef MULTIPLICITY
1692 PERL_UNUSED_ARG(my_perl);
1693 #endif
1694 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1695 {
1696 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1697
1698 if (s && strEQ(s, "1")) {
1699 const unsigned char *seed= PERL_HASH_SEED;
1700 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1701 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1702 while (seed < seed_end) {
1703 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1704 }
1705 #ifdef PERL_HASH_RANDOMIZE_KEYS
1706 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1707 PL_HASH_RAND_BITS_ENABLED,
1708 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1709 #endif
1710 PerlIO_printf(Perl_debug_log, "\n");
1711 }
1712 }
1713 #endif /* #if (defined(USE_HASH_SEED) ... */
1714
1715 #ifdef __amigaos4__
1716 {
1717 struct NameTranslationInfo nti;
1718 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1719 }
1720 #endif
1721
1722 {
1723 int i;
1724 assert(argc >= 0);
1725 for(i = 0; i != argc; i++)
1726 assert(argv[i]);
1727 assert(!argv[argc]);
1728 }
1729 PL_origargc = argc;
1730 PL_origargv = argv;
1731
1732 if (PL_origalen != 0) {
1733 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1734 }
1735 else {
1736 /* Set PL_origalen be the sum of the contiguous argv[]
1737 * elements plus the size of the env in case that it is
1738 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1739 * as the maximum modifiable length of $0. In the worst case
1740 * the area we are able to modify is limited to the size of
1741 * the original argv[0]. (See below for 'contiguous', though.)
1742 * --jhi */
1743 const char *s = NULL;
1744 const UV mask = ~(UV)(PTRSIZE-1);
1745 /* Do the mask check only if the args seem like aligned. */
1746 const UV aligned =
1747 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1748
1749 /* See if all the arguments are contiguous in memory. Note
1750 * that 'contiguous' is a loose term because some platforms
1751 * align the argv[] and the envp[]. If the arguments look
1752 * like non-aligned, assume that they are 'strictly' or
1753 * 'traditionally' contiguous. If the arguments look like
1754 * aligned, we just check that they are within aligned
1755 * PTRSIZE bytes. As long as no system has something bizarre
1756 * like the argv[] interleaved with some other data, we are
1757 * fine. (Did I just evoke Murphy's Law?) --jhi */
1758 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1759 int i;
1760 while (*s) s++;
1761 for (i = 1; i < PL_origargc; i++) {
1762 if ((PL_origargv[i] == s + 1
1763 #ifdef OS2
1764 || PL_origargv[i] == s + 2
1765 #endif
1766 )
1767 ||
1768 (aligned &&
1769 (PL_origargv[i] > s &&
1770 PL_origargv[i] <=
1771 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1772 )
1773 {
1774 s = PL_origargv[i];
1775 while (*s) s++;
1776 }
1777 else
1778 break;
1779 }
1780 }
1781
1782 #ifndef PERL_USE_SAFE_PUTENV
1783 /* Can we grab env area too to be used as the area for $0? */
1784 if (s && PL_origenviron && !PL_use_safe_putenv) {
1785 if ((PL_origenviron[0] == s + 1)
1786 ||
1787 (aligned &&
1788 (PL_origenviron[0] > s &&
1789 PL_origenviron[0] <=
1790 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1791 )
1792 {
1793 int i;
1794 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1795 s = PL_origenviron[0];
1796 while (*s) s++;
1797 #endif
1798 my_setenv("NoNe SuCh", NULL);
1799 /* Force copy of environment. */
1800 for (i = 1; PL_origenviron[i]; i++) {
1801 if (PL_origenviron[i] == s + 1
1802 ||
1803 (aligned &&
1804 (PL_origenviron[i] > s &&
1805 PL_origenviron[i] <=
1806 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1807 )
1808 {
1809 s = PL_origenviron[i];
1810 while (*s) s++;
1811 }
1812 else
1813 break;
1814 }
1815 }
1816 }
1817 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1818
1819 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1820 }
1821
1822 if (PL_do_undump) {
1823
1824 /* Come here if running an undumped a.out. */
1825
1826 PL_origfilename = savepv(argv[0]);
1827 PL_do_undump = FALSE;
1828 cxstack_ix = -1; /* start label stack again */
1829 init_ids();
1830 assert (!TAINT_get);
1831 TAINT;
1832 set_caret_X();
1833 TAINT_NOT;
1834 init_postdump_symbols(argc,argv,env);
1835 return 0;
1836 }
1837
1838 if (PL_main_root) {
1839 op_free(PL_main_root);
1840 PL_main_root = NULL;
1841 }
1842 PL_main_start = NULL;
1843 SvREFCNT_dec(PL_main_cv);
1844 PL_main_cv = NULL;
1845
1846 time(&PL_basetime);
1847 oldscope = PL_scopestack_ix;
1848 PL_dowarn = G_WARN_OFF;
1849
1850 JMPENV_PUSH(ret);
1851 switch (ret) {
1852 case 0:
1853 parse_body(env,xsinit);
1854 if (PL_unitcheckav) {
1855 call_list(oldscope, PL_unitcheckav);
1856 }
1857 if (PL_checkav) {
1858 PERL_SET_PHASE(PERL_PHASE_CHECK);
1859 call_list(oldscope, PL_checkav);
1860 }
1861 ret = 0;
1862 break;
1863 case 1:
1864 STATUS_ALL_FAILURE;
1865 /* FALLTHROUGH */
1866 case 2:
1867 /* my_exit() was called */
1868 while (PL_scopestack_ix > oldscope)
1869 LEAVE;
1870 FREETMPS;
1871 SET_CURSTASH(PL_defstash);
1872 if (PL_unitcheckav) {
1873 call_list(oldscope, PL_unitcheckav);
1874 }
1875 if (PL_checkav) {
1876 PERL_SET_PHASE(PERL_PHASE_CHECK);
1877 call_list(oldscope, PL_checkav);
1878 }
1879 ret = STATUS_EXIT;
1880 if (ret == 0) {
1881 /*
1882 * At this point we should do
1883 * ret = 0x100;
1884 * to avoid [perl #2754], but that bugfix has been postponed
1885 * because of the Module::Install breakage it causes
1886 * [perl #132577].
1887 */
1888 }
1889 break;
1890 case 3:
1891 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1892 ret = 1;
1893 break;
1894 }
1895 JMPENV_POP;
1896 return ret;
1897 }
1898
1899 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1900 miniperl, and we need to see those flags reflected in the values here. */
1901
1902 /* What this returns is subject to change. Use the public interface in Config.
1903 */
1904 static void
S_Internals_V(pTHX_ CV * cv)1905 S_Internals_V(pTHX_ CV *cv)
1906 {
1907 dXSARGS;
1908 #ifdef LOCAL_PATCH_COUNT
1909 const int local_patch_count = LOCAL_PATCH_COUNT;
1910 #else
1911 const int local_patch_count = 0;
1912 #endif
1913 const int entries = 3 + local_patch_count;
1914 int i;
1915 static const char non_bincompat_options[] =
1916 # ifdef DEBUGGING
1917 " DEBUGGING"
1918 # endif
1919 # ifdef NO_MATHOMS
1920 " NO_MATHOMS"
1921 # endif
1922 # ifdef NO_HASH_SEED
1923 " NO_HASH_SEED"
1924 # endif
1925 # ifdef NO_TAINT_SUPPORT
1926 " NO_TAINT_SUPPORT"
1927 # endif
1928 # ifdef PERL_BOOL_AS_CHAR
1929 " PERL_BOOL_AS_CHAR"
1930 # endif
1931 # ifdef PERL_COPY_ON_WRITE
1932 " PERL_COPY_ON_WRITE"
1933 # endif
1934 # ifdef PERL_DISABLE_PMC
1935 " PERL_DISABLE_PMC"
1936 # endif
1937 # ifdef PERL_DONT_CREATE_GVSV
1938 " PERL_DONT_CREATE_GVSV"
1939 # endif
1940 # ifdef PERL_EXTERNAL_GLOB
1941 " PERL_EXTERNAL_GLOB"
1942 # endif
1943 # ifdef PERL_HASH_FUNC_SIPHASH
1944 " PERL_HASH_FUNC_SIPHASH"
1945 # endif
1946 # ifdef PERL_HASH_FUNC_SDBM
1947 " PERL_HASH_FUNC_SDBM"
1948 # endif
1949 # ifdef PERL_HASH_FUNC_DJB2
1950 " PERL_HASH_FUNC_DJB2"
1951 # endif
1952 # ifdef PERL_HASH_FUNC_SUPERFAST
1953 " PERL_HASH_FUNC_SUPERFAST"
1954 # endif
1955 # ifdef PERL_HASH_FUNC_MURMUR3
1956 " PERL_HASH_FUNC_MURMUR3"
1957 # endif
1958 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1959 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1960 # endif
1961 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1962 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1963 # endif
1964 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1965 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1966 # endif
1967 # ifdef PERL_IS_MINIPERL
1968 " PERL_IS_MINIPERL"
1969 # endif
1970 # ifdef PERL_MALLOC_WRAP
1971 " PERL_MALLOC_WRAP"
1972 # endif
1973 # ifdef PERL_MEM_LOG
1974 " PERL_MEM_LOG"
1975 # endif
1976 # ifdef PERL_MEM_LOG_NOIMPL
1977 " PERL_MEM_LOG_NOIMPL"
1978 # endif
1979 # ifdef PERL_OP_PARENT
1980 " PERL_OP_PARENT"
1981 # endif
1982 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1983 " PERL_PERTURB_KEYS_DETERMINISTIC"
1984 # endif
1985 # ifdef PERL_PERTURB_KEYS_DISABLED
1986 " PERL_PERTURB_KEYS_DISABLED"
1987 # endif
1988 # ifdef PERL_PERTURB_KEYS_RANDOM
1989 " PERL_PERTURB_KEYS_RANDOM"
1990 # endif
1991 # ifdef PERL_PRESERVE_IVUV
1992 " PERL_PRESERVE_IVUV"
1993 # endif
1994 # ifdef PERL_RELOCATABLE_INCPUSH
1995 " PERL_RELOCATABLE_INCPUSH"
1996 # endif
1997 # ifdef PERL_USE_DEVEL
1998 " PERL_USE_DEVEL"
1999 # endif
2000 # ifdef PERL_USE_SAFE_PUTENV
2001 " PERL_USE_SAFE_PUTENV"
2002 # endif
2003 # ifdef SILENT_NO_TAINT_SUPPORT
2004 " SILENT_NO_TAINT_SUPPORT"
2005 # endif
2006 # ifdef UNLINK_ALL_VERSIONS
2007 " UNLINK_ALL_VERSIONS"
2008 # endif
2009 # ifdef USE_ATTRIBUTES_FOR_PERLIO
2010 " USE_ATTRIBUTES_FOR_PERLIO"
2011 # endif
2012 # ifdef USE_FAST_STDIO
2013 " USE_FAST_STDIO"
2014 # endif
2015 # ifdef USE_LOCALE
2016 " USE_LOCALE"
2017 # endif
2018 # ifdef USE_LOCALE_CTYPE
2019 " USE_LOCALE_CTYPE"
2020 # endif
2021 # ifdef WIN32_NO_REGISTRY
2022 " USE_NO_REGISTRY"
2023 # endif
2024 # ifdef USE_PERL_ATOF
2025 " USE_PERL_ATOF"
2026 # endif
2027 # ifdef USE_SITECUSTOMIZE
2028 " USE_SITECUSTOMIZE"
2029 # endif
2030 # ifdef USE_THREAD_SAFE_LOCALE
2031 " USE_THREAD_SAFE_LOCALE"
2032 # endif
2033 ;
2034 PERL_UNUSED_ARG(cv);
2035 PERL_UNUSED_VAR(items);
2036
2037 EXTEND(SP, entries);
2038
2039 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
2040 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
2041 sizeof(non_bincompat_options) - 1, SVs_TEMP));
2042
2043 PUSHs(&PL_sv_undef);
2044
2045 for (i = 1; i <= local_patch_count; i++) {
2046 /* This will be an undef, if PL_localpatches[i] is NULL. */
2047 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
2048 }
2049
2050 XSRETURN(entries);
2051 }
2052
2053 #define INCPUSH_UNSHIFT 0x01
2054 #define INCPUSH_ADD_OLD_VERS 0x02
2055 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
2056 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
2057 #define INCPUSH_NOT_BASEDIR 0x10
2058 #define INCPUSH_CAN_RELOCATE 0x20
2059 #define INCPUSH_ADD_SUB_DIRS \
2060 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
2061
2062 STATIC void *
S_parse_body(pTHX_ char ** env,XSINIT_t xsinit)2063 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
2064 {
2065 PerlIO *rsfp;
2066 int argc = PL_origargc;
2067 char **argv = PL_origargv;
2068 const char *scriptname = NULL;
2069 bool dosearch = FALSE;
2070 char c;
2071 bool doextract = FALSE;
2072 const char *cddir = NULL;
2073 bool minus_e = FALSE; /* both -e and -E */
2074 #ifdef USE_SITECUSTOMIZE
2075 bool minus_f = FALSE;
2076 #endif
2077 SV *linestr_sv = NULL;
2078 bool add_read_e_script = FALSE;
2079 U32 lex_start_flags = 0;
2080
2081 PERL_SET_PHASE(PERL_PHASE_START);
2082
2083 init_main_stash();
2084
2085 {
2086 const char *s;
2087 for (argc--,argv++; argc > 0; argc--,argv++) {
2088 if (argv[0][0] != '-' || !argv[0][1])
2089 break;
2090 s = argv[0]+1;
2091 reswitch:
2092 switch ((c = *s)) {
2093 case 'C':
2094 #ifndef PERL_STRICT_CR
2095 case '\r':
2096 #endif
2097 case ' ':
2098 case '0':
2099 case 'F':
2100 case 'a':
2101 case 'c':
2102 case 'd':
2103 case 'D':
2104 case 'h':
2105 case 'i':
2106 case 'l':
2107 case 'M':
2108 case 'm':
2109 case 'n':
2110 case 'p':
2111 case 's':
2112 case 'u':
2113 case 'U':
2114 case 'v':
2115 case 'W':
2116 case 'X':
2117 case 'w':
2118 if ((s = moreswitches(s)))
2119 goto reswitch;
2120 break;
2121
2122 case 't':
2123 #if defined(SILENT_NO_TAINT_SUPPORT)
2124 /* silently ignore */
2125 #elif defined(NO_TAINT_SUPPORT)
2126 Perl_croak_nocontext("This perl was compiled without taint support. "
2127 "Cowardly refusing to run with -t or -T flags");
2128 #else
2129 CHECK_MALLOC_TOO_LATE_FOR('t');
2130 if( !TAINTING_get ) {
2131 TAINT_WARN_set(TRUE);
2132 TAINTING_set(TRUE);
2133 }
2134 #endif
2135 s++;
2136 goto reswitch;
2137 case 'T':
2138 #if defined(SILENT_NO_TAINT_SUPPORT)
2139 /* silently ignore */
2140 #elif defined(NO_TAINT_SUPPORT)
2141 Perl_croak_nocontext("This perl was compiled without taint support. "
2142 "Cowardly refusing to run with -t or -T flags");
2143 #else
2144 CHECK_MALLOC_TOO_LATE_FOR('T');
2145 TAINTING_set(TRUE);
2146 TAINT_WARN_set(FALSE);
2147 #endif
2148 s++;
2149 goto reswitch;
2150
2151 case 'E':
2152 PL_minus_E = TRUE;
2153 /* FALLTHROUGH */
2154 case 'e':
2155 forbid_setid('e', FALSE);
2156 minus_e = TRUE;
2157 if (!PL_e_script) {
2158 PL_e_script = newSVpvs("");
2159 add_read_e_script = TRUE;
2160 }
2161 if (*++s)
2162 sv_catpv(PL_e_script, s);
2163 else if (argv[1]) {
2164 sv_catpv(PL_e_script, argv[1]);
2165 argc--,argv++;
2166 }
2167 else
2168 Perl_croak(aTHX_ "No code specified for -%c", c);
2169 sv_catpvs(PL_e_script, "\n");
2170 break;
2171
2172 case 'f':
2173 #ifdef USE_SITECUSTOMIZE
2174 minus_f = TRUE;
2175 #endif
2176 s++;
2177 goto reswitch;
2178
2179 case 'I': /* -I handled both here and in moreswitches() */
2180 forbid_setid('I', FALSE);
2181 if (!*++s && (s=argv[1]) != NULL) {
2182 argc--,argv++;
2183 }
2184 if (s && *s) {
2185 STRLEN len = strlen(s);
2186 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2187 }
2188 else
2189 Perl_croak(aTHX_ "No directory specified for -I");
2190 break;
2191 case 'S':
2192 forbid_setid('S', FALSE);
2193 dosearch = TRUE;
2194 s++;
2195 goto reswitch;
2196 case 'V':
2197 {
2198 SV *opts_prog;
2199
2200 if (*++s != ':') {
2201 opts_prog = newSVpvs("use Config; Config::_V()");
2202 }
2203 else {
2204 ++s;
2205 opts_prog = Perl_newSVpvf(aTHX_
2206 "use Config; Config::config_vars(qw%c%s%c)",
2207 0, s, 0);
2208 s += strlen(s);
2209 }
2210 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2211 /* don't look for script or read stdin */
2212 scriptname = BIT_BUCKET;
2213 goto reswitch;
2214 }
2215 case 'x':
2216 doextract = TRUE;
2217 s++;
2218 if (*s)
2219 cddir = s;
2220 break;
2221 case 0:
2222 break;
2223 case '-':
2224 if (!*++s || isSPACE(*s)) {
2225 argc--,argv++;
2226 goto switch_end;
2227 }
2228 /* catch use of gnu style long options.
2229 Both of these exit immediately. */
2230 if (strEQ(s, "version"))
2231 minus_v();
2232 if (strEQ(s, "help"))
2233 usage();
2234 s--;
2235 /* FALLTHROUGH */
2236 default:
2237 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2238 }
2239 }
2240 }
2241
2242 switch_end:
2243
2244 {
2245 char *s;
2246
2247 if (
2248 #ifndef SECURE_INTERNAL_GETENV
2249 !TAINTING_get &&
2250 #endif
2251 (s = PerlEnv_getenv("PERL5OPT")))
2252 {
2253 while (isSPACE(*s))
2254 s++;
2255 if (*s == '-' && *(s+1) == 'T') {
2256 #if defined(SILENT_NO_TAINT_SUPPORT)
2257 /* silently ignore */
2258 #elif defined(NO_TAINT_SUPPORT)
2259 Perl_croak_nocontext("This perl was compiled without taint support. "
2260 "Cowardly refusing to run with -t or -T flags");
2261 #else
2262 CHECK_MALLOC_TOO_LATE_FOR('T');
2263 TAINTING_set(TRUE);
2264 TAINT_WARN_set(FALSE);
2265 #endif
2266 }
2267 else {
2268 char *popt_copy = NULL;
2269 while (s && *s) {
2270 const char *d;
2271 while (isSPACE(*s))
2272 s++;
2273 if (*s == '-') {
2274 s++;
2275 if (isSPACE(*s))
2276 continue;
2277 }
2278 d = s;
2279 if (!*s)
2280 break;
2281 if (!memCHRs("CDIMUdmtwW", *s))
2282 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2283 while (++s && *s) {
2284 if (isSPACE(*s)) {
2285 if (!popt_copy) {
2286 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2287 s = popt_copy + (s - d);
2288 d = popt_copy;
2289 }
2290 *s++ = '\0';
2291 break;
2292 }
2293 }
2294 if (*d == 't') {
2295 #if defined(SILENT_NO_TAINT_SUPPORT)
2296 /* silently ignore */
2297 #elif defined(NO_TAINT_SUPPORT)
2298 Perl_croak_nocontext("This perl was compiled without taint support. "
2299 "Cowardly refusing to run with -t or -T flags");
2300 #else
2301 if( !TAINTING_get) {
2302 TAINT_WARN_set(TRUE);
2303 TAINTING_set(TRUE);
2304 }
2305 #endif
2306 } else {
2307 moreswitches(d);
2308 }
2309 }
2310 }
2311 }
2312 }
2313
2314 #ifndef NO_PERL_INTERNAL_RAND_SEED
2315 /* If we're not set[ug]id, we might have honored
2316 PERL_INTERNAL_RAND_SEED in perl_construct().
2317 At this point command-line options have been parsed, so if
2318 we're now tainting and not set[ug]id re-seed.
2319 This could possibly be wasteful if PERL_INTERNAL_RAND_SEED is invalid,
2320 but avoids duplicating the logic from perl_construct().
2321 */
2322 if (TAINT_get &&
2323 PerlProc_getuid() == PerlProc_geteuid() &&
2324 PerlProc_getgid() == PerlProc_getegid()) {
2325 Perl_drand48_init_r(&PL_internal_random_state, seed());
2326 }
2327 #endif
2328
2329 /* Set $^X early so that it can be used for relocatable paths in @INC */
2330 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2331 assert (!TAINT_get);
2332 TAINT;
2333 set_caret_X();
2334 TAINT_NOT;
2335
2336 #if defined(USE_SITECUSTOMIZE)
2337 if (!minus_f) {
2338 /* The games with local $! are to avoid setting errno if there is no
2339 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2340 ie a q() operator with a NUL byte as a the delimiter. This avoids
2341 problems with pathnames containing (say) ' */
2342 # ifdef PERL_IS_MINIPERL
2343 AV *const inc = GvAV(PL_incgv);
2344 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2345
2346 if (inc0) {
2347 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2348 it should be reported immediately as a build failure. */
2349 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2350 Perl_newSVpvf(aTHX_
2351 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2352 "do {local $!; -f $f }"
2353 " and do $f || die $@ || qq '$f: $!' }",
2354 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2355 }
2356 # else
2357 /* SITELIB_EXP is a function call on Win32. */
2358 const char *const raw_sitelib = SITELIB_EXP;
2359 if (raw_sitelib) {
2360 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2361 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2362 INCPUSH_CAN_RELOCATE);
2363 const char *const sitelib = SvPVX(sitelib_sv);
2364 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2365 Perl_newSVpvf(aTHX_
2366 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2367 0, SVfARG(sitelib), 0,
2368 0, SVfARG(sitelib), 0));
2369 assert (SvREFCNT(sitelib_sv) == 1);
2370 SvREFCNT_dec(sitelib_sv);
2371 }
2372 # endif
2373 }
2374 #endif
2375
2376 if (!scriptname)
2377 scriptname = argv[0];
2378 if (PL_e_script) {
2379 argc++,argv--;
2380 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2381 }
2382 else if (scriptname == NULL) {
2383 #ifdef MSDOS
2384 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2385 moreswitches("h");
2386 #endif
2387 scriptname = "-";
2388 }
2389
2390 assert (!TAINT_get);
2391 init_perllib();
2392
2393 {
2394 bool suidscript = FALSE;
2395
2396 rsfp = open_script(scriptname, dosearch, &suidscript);
2397 if (!rsfp) {
2398 rsfp = PerlIO_stdin();
2399 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2400 }
2401
2402 validate_suid(rsfp);
2403
2404 #ifndef PERL_MICRO
2405 # if defined(SIGCHLD) || defined(SIGCLD)
2406 {
2407 # ifndef SIGCHLD
2408 # define SIGCHLD SIGCLD
2409 # endif
2410 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2411 if (sigstate == (Sighandler_t) SIG_IGN) {
2412 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2413 "Can't ignore signal CHLD, forcing to default");
2414 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2415 }
2416 }
2417 # endif
2418 #endif
2419
2420 if (doextract) {
2421
2422 /* This will croak if suidscript is true, as -x cannot be used with
2423 setuid scripts. */
2424 forbid_setid('x', suidscript);
2425 /* Hence you can't get here if suidscript is true */
2426
2427 linestr_sv = newSV_type(SVt_PV);
2428 lex_start_flags |= LEX_START_COPIED;
2429 find_beginning(linestr_sv, rsfp);
2430 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2431 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2432 }
2433 }
2434
2435 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2436 CvUNIQUE_on(PL_compcv);
2437
2438 CvPADLIST_set(PL_compcv, pad_new(0));
2439
2440 PL_isarev = newHV();
2441
2442 boot_core_PerlIO();
2443 boot_core_UNIVERSAL();
2444 boot_core_mro();
2445 newXS("Internals::V", S_Internals_V, __FILE__);
2446
2447 if (xsinit)
2448 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2449 #ifndef PERL_MICRO
2450 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__)
2451 init_os_extras();
2452 #endif
2453 #endif
2454
2455 #ifdef USE_SOCKS
2456 # ifdef HAS_SOCKS5_INIT
2457 socks5_init(argv[0]);
2458 # else
2459 SOCKSinit(argv[0]);
2460 # endif
2461 #endif
2462
2463 init_predump_symbols();
2464 /* init_postdump_symbols not currently designed to be called */
2465 /* more than once (ENV isn't cleared first, for example) */
2466 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2467 if (!PL_do_undump)
2468 init_postdump_symbols(argc,argv,env);
2469
2470 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2471 * or explicitly in some platforms.
2472 * PL_utf8locale is conditionally turned on by
2473 * locale.c:Perl_init_i18nl10n() if the environment
2474 * look like the user wants to use UTF-8. */
2475 # ifndef PERL_IS_MINIPERL
2476 if (PL_unicode) {
2477 /* Requires init_predump_symbols(). */
2478 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2479 IO* io;
2480 PerlIO* fp;
2481 SV* sv;
2482
2483 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2484 * and the default open disciplines. */
2485 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2486 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2487 (fp = IoIFP(io)))
2488 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2489 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2490 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2491 (fp = IoOFP(io)))
2492 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2493 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2494 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2495 (fp = IoOFP(io)))
2496 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2497 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2498 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2499 SVt_PV)))) {
2500 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2501 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2502 if (in) {
2503 if (out)
2504 sv_setpvs(sv, ":utf8\0:utf8");
2505 else
2506 sv_setpvs(sv, ":utf8\0");
2507 }
2508 else if (out)
2509 sv_setpvs(sv, "\0:utf8");
2510 SvSETMAGIC(sv);
2511 }
2512 }
2513 }
2514 #endif
2515
2516 {
2517 const char *s;
2518 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2519 if (strEQ(s, "unsafe"))
2520 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2521 else if (strEQ(s, "safe"))
2522 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2523 else
2524 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2525 }
2526 }
2527
2528
2529 lex_start(linestr_sv, rsfp, lex_start_flags);
2530 SvREFCNT_dec(linestr_sv);
2531
2532 PL_subname = newSVpvs("main");
2533
2534 if (add_read_e_script)
2535 filter_add(read_e_script, NULL);
2536
2537 /* now parse the script */
2538 if (minus_e == FALSE)
2539 PL_hints |= HINTS_DEFAULT; /* after init_main_stash ; need to be after init_predump_symbols */
2540
2541 SETERRNO(0,SS_NORMAL);
2542 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2543 abort_execution("", PL_origfilename);
2544 }
2545 CopLINE_set(PL_curcop, 0);
2546 SET_CURSTASH(PL_defstash);
2547 if (PL_e_script) {
2548 SvREFCNT_dec(PL_e_script);
2549 PL_e_script = NULL;
2550 }
2551
2552 if (PL_do_undump)
2553 my_unexec();
2554
2555 if (isWARN_ONCE) {
2556 SAVECOPFILE(PL_curcop);
2557 SAVECOPLINE(PL_curcop);
2558 gv_check(PL_defstash);
2559 }
2560
2561 LEAVE;
2562 FREETMPS;
2563
2564 #ifdef MYMALLOC
2565 {
2566 const char *s;
2567 UV uv;
2568 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2569 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2570 dump_mstats("after compilation:");
2571 }
2572 #endif
2573
2574 ENTER;
2575 PL_restartjmpenv = NULL;
2576 PL_restartop = 0;
2577 return NULL;
2578 }
2579
2580 /*
2581 =for apidoc perl_run
2582
2583 Tells a Perl interpreter to run its main program. See L<perlembed>
2584 for a tutorial.
2585
2586 C<my_perl> points to the Perl interpreter. It must have been previously
2587 created through the use of L</perl_alloc> and L</perl_construct>, and
2588 initialised through L</perl_parse>. This function should not be called
2589 if L</perl_parse> returned a non-zero value, indicating a failure in
2590 initialisation or compilation.
2591
2592 This function executes code in C<INIT> blocks, and then executes the
2593 main program. The code to be executed is that established by the prior
2594 call to L</perl_parse>. If the interpreter's C<PL_exit_flags> word
2595 does not have the C<PERL_EXIT_DESTRUCT_END> flag set, then this function
2596 will also execute code in C<END> blocks. If it is desired to make any
2597 further use of the interpreter after calling this function, then C<END>
2598 blocks should be postponed to L</perl_destruct> time by setting that flag.
2599
2600 Returns an integer of slightly tricky interpretation. The correct use
2601 of the return value is as a truth value indicating whether the program
2602 terminated non-locally. If zero is returned, this indicates that
2603 the program ran to completion, and it is safe to make other use of the
2604 interpreter (provided that the C<PERL_EXIT_DESTRUCT_END> flag was set as
2605 described above). If a non-zero value is returned, this indicates that
2606 the interpreter wants to terminate early. The interpreter should not be
2607 just abandoned because of this desire to terminate; the caller should
2608 proceed to shut the interpreter down cleanly with L</perl_destruct>
2609 and free it with L</perl_free>.
2610
2611 For historical reasons, the non-zero return value also attempts to
2612 be a suitable value to pass to the C library function C<exit> (or to
2613 return from C<main>), to serve as an exit code indicating the nature of
2614 the way the program terminated. However, this isn't portable, due to
2615 differing exit code conventions. An attempt is made to return an exit
2616 code of the type required by the host operating system, but because
2617 it is constrained to be non-zero, it is not necessarily possible to
2618 indicate every type of exit. It is only reliable on Unix, where a zero
2619 exit code can be augmented with a set bit that will be ignored. In any
2620 case, this function is not the correct place to acquire an exit code:
2621 one should get that from L</perl_destruct>.
2622
2623 =cut
2624 */
2625
2626 int
perl_run(pTHXx)2627 perl_run(pTHXx)
2628 {
2629 I32 oldscope;
2630 int ret = 0;
2631 dJMPENV;
2632
2633 PERL_ARGS_ASSERT_PERL_RUN;
2634 #ifndef MULTIPLICITY
2635 PERL_UNUSED_ARG(my_perl);
2636 #endif
2637
2638 oldscope = PL_scopestack_ix;
2639 #ifdef VMS
2640 VMSISH_HUSHED = 0;
2641 #endif
2642
2643 JMPENV_PUSH(ret);
2644 switch (ret) {
2645 case 1:
2646 cxstack_ix = -1; /* start context stack again */
2647 goto redo_body;
2648 case 0: /* normal completion */
2649 redo_body:
2650 run_body(oldscope);
2651 /* FALLTHROUGH */
2652 case 2: /* my_exit() */
2653 while (PL_scopestack_ix > oldscope)
2654 LEAVE;
2655 FREETMPS;
2656 SET_CURSTASH(PL_defstash);
2657 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2658 PL_endav && !PL_minus_c) {
2659 PERL_SET_PHASE(PERL_PHASE_END);
2660 call_list(oldscope, PL_endav);
2661 }
2662 #ifdef MYMALLOC
2663 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2664 dump_mstats("after execution: ");
2665 #endif
2666 ret = STATUS_EXIT;
2667 break;
2668 case 3:
2669 if (PL_restartop) {
2670 POPSTACK_TO(PL_mainstack);
2671 goto redo_body;
2672 }
2673 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2674 FREETMPS;
2675 ret = 1;
2676 break;
2677 }
2678
2679 JMPENV_POP;
2680 return ret;
2681 }
2682
2683 STATIC void
S_run_body(pTHX_ I32 oldscope)2684 S_run_body(pTHX_ I32 oldscope)
2685 {
2686 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2687 PL_sawampersand ? "Enabling" : "Omitting",
2688 (unsigned int)(PL_sawampersand)));
2689
2690 if (!PL_restartop) {
2691 #ifdef DEBUGGING
2692 if (DEBUG_x_TEST || DEBUG_B_TEST)
2693 dump_all_perl(!DEBUG_B_TEST);
2694 if (!DEBUG_q_TEST)
2695 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2696 #endif
2697
2698 if (PL_minus_c) {
2699 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2700 my_exit(0);
2701 }
2702 if (PERLDB_SINGLE && PL_DBsingle)
2703 PL_DBsingle_iv = 1;
2704 if (PL_initav) {
2705 PERL_SET_PHASE(PERL_PHASE_INIT);
2706 call_list(oldscope, PL_initav);
2707 }
2708 #ifdef PERL_DEBUG_READONLY_OPS
2709 if (PL_main_root && PL_main_root->op_slabbed)
2710 Slab_to_ro(OpSLAB(PL_main_root));
2711 #endif
2712 }
2713
2714 /* do it */
2715
2716 PERL_SET_PHASE(PERL_PHASE_RUN);
2717
2718 if (PL_restartop) {
2719 PL_restartjmpenv = NULL;
2720 PL_op = PL_restartop;
2721 PL_restartop = 0;
2722 CALLRUNOPS(aTHX);
2723 }
2724 else if (PL_main_start) {
2725 CvDEPTH(PL_main_cv) = 1;
2726 PL_op = PL_main_start;
2727 CALLRUNOPS(aTHX);
2728 }
2729 my_exit(0);
2730 NOT_REACHED; /* NOTREACHED */
2731 }
2732
2733 /*
2734 =for apidoc_section $SV
2735
2736 =for apidoc get_sv
2737
2738 Returns the SV of the specified Perl scalar. C<flags> are passed to
2739 C<gv_fetchpv>. If C<GV_ADD> is set and the
2740 Perl variable does not exist then it will be created. If C<flags> is zero
2741 and the variable does not exist then NULL is returned.
2742
2743 =cut
2744 */
2745
2746 SV*
Perl_get_sv(pTHX_ const char * name,I32 flags)2747 Perl_get_sv(pTHX_ const char *name, I32 flags)
2748 {
2749 GV *gv;
2750
2751 PERL_ARGS_ASSERT_GET_SV;
2752
2753 gv = gv_fetchpv(name, flags, SVt_PV);
2754 if (gv)
2755 return GvSV(gv);
2756 return NULL;
2757 }
2758
2759 /*
2760 =for apidoc_section $AV
2761
2762 =for apidoc get_av
2763
2764 Returns the AV of the specified Perl global or package array with the given
2765 name (so it won't work on lexical variables). C<flags> are passed
2766 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2767 Perl variable does not exist then it will be created. If C<flags> is zero
2768 and the variable does not exist then NULL is returned.
2769
2770 Perl equivalent: C<@{"$name"}>.
2771
2772 =cut
2773 */
2774
2775 AV*
Perl_get_av(pTHX_ const char * name,I32 flags)2776 Perl_get_av(pTHX_ const char *name, I32 flags)
2777 {
2778 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2779
2780 PERL_ARGS_ASSERT_GET_AV;
2781
2782 if (flags)
2783 return GvAVn(gv);
2784 if (gv)
2785 return GvAV(gv);
2786 return NULL;
2787 }
2788
2789 /*
2790 =for apidoc_section $HV
2791
2792 =for apidoc get_hv
2793
2794 Returns the HV of the specified Perl hash. C<flags> are passed to
2795 C<gv_fetchpv>. If C<GV_ADD> is set and the
2796 Perl variable does not exist then it will be created. If C<flags> is zero
2797 and the variable does not exist then C<NULL> is returned.
2798
2799 =cut
2800 */
2801
2802 HV*
Perl_get_hv(pTHX_ const char * name,I32 flags)2803 Perl_get_hv(pTHX_ const char *name, I32 flags)
2804 {
2805 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2806
2807 PERL_ARGS_ASSERT_GET_HV;
2808
2809 if (flags)
2810 return GvHVn(gv);
2811 if (gv)
2812 return GvHV(gv);
2813 return NULL;
2814 }
2815
2816 /*
2817 =for apidoc_section $CV
2818
2819 =for apidoc get_cv
2820 =for apidoc_item |CV *|get_cvs|"string"|I32 flags
2821 =for apidoc_item get_cvn_flags
2822
2823 These return the CV of the specified Perl subroutine. C<flags> are passed to
2824 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2825 exist then it will be declared (which has the same effect as saying
2826 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist,
2827 then NULL is returned.
2828
2829 The forms differ only in how the subroutine is specified.. With C<get_cvs>,
2830 the name is a literal C string, enclosed in double quotes. With C<get_cv>, the
2831 name is given by the C<name> parameter, which must be a NUL-terminated C
2832 string. With C<get_cvn_flags>, the name is also given by the C<name>
2833 parameter, but it is a Perl string (possibly containing embedded NUL bytes),
2834 and its length in bytes is contained in the C<len> parameter.
2835
2836 =for apidoc Amnh||GV_ADD
2837
2838 =cut
2839 */
2840
2841 CV*
Perl_get_cvn_flags(pTHX_ const char * name,STRLEN len,I32 flags)2842 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2843 {
2844 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2845
2846 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2847
2848 if (gv && UNLIKELY(SvROK(gv)) && SvTYPE(SvRV((SV *)gv)) == SVt_PVCV)
2849 return (CV*)SvRV((SV *)gv);
2850
2851 /* XXX this is probably not what they think they're getting.
2852 * It has the same effect as "sub name;", i.e. just a forward
2853 * declaration! */
2854 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2855 return newSTUB(gv,0);
2856 }
2857 if (gv)
2858 return GvCVu(gv);
2859 return NULL;
2860 }
2861
2862 /* Nothing in core calls this now, but we can't replace it with a macro and
2863 move it to mathoms.c as a macro would evaluate name twice. */
2864 CV*
Perl_get_cv(pTHX_ const char * name,I32 flags)2865 Perl_get_cv(pTHX_ const char *name, I32 flags)
2866 {
2867 PERL_ARGS_ASSERT_GET_CV;
2868
2869 return get_cvn_flags(name, strlen(name), flags);
2870 }
2871
2872 /* Be sure to refetch the stack pointer after calling these routines. */
2873
2874 /*
2875
2876 =for apidoc_section $callback
2877
2878 =for apidoc call_argv
2879
2880 Performs a callback to the specified named and package-scoped Perl subroutine
2881 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2882 L<perlcall>.
2883
2884 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2885
2886 =cut
2887 */
2888
2889 I32
Perl_call_argv(pTHX_ const char * sub_name,I32 flags,char ** argv)2890 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2891
2892 /* See G_* flags in cop.h */
2893 /* null terminated arg list */
2894 {
2895 dSP;
2896
2897 PERL_ARGS_ASSERT_CALL_ARGV;
2898
2899 PUSHMARK(SP);
2900 while (*argv) {
2901 mXPUSHs(newSVpv(*argv,0));
2902 argv++;
2903 }
2904 PUTBACK;
2905 return call_pv(sub_name, flags);
2906 }
2907
2908 /*
2909 =for apidoc call_pv
2910
2911 Performs a callback to the specified Perl sub. See L<perlcall>.
2912
2913 =cut
2914 */
2915
2916 I32
Perl_call_pv(pTHX_ const char * sub_name,I32 flags)2917 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2918 /* name of the subroutine */
2919 /* See G_* flags in cop.h */
2920 {
2921 PERL_ARGS_ASSERT_CALL_PV;
2922
2923 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2924 }
2925
2926 /*
2927 =for apidoc call_method
2928
2929 Performs a callback to the specified Perl method. The blessed object must
2930 be on the stack. See L<perlcall>.
2931
2932 =cut
2933 */
2934
2935 I32
Perl_call_method(pTHX_ const char * methname,I32 flags)2936 Perl_call_method(pTHX_ const char *methname, I32 flags)
2937 /* name of the subroutine */
2938 /* See G_* flags in cop.h */
2939 {
2940 STRLEN len;
2941 SV* sv;
2942 PERL_ARGS_ASSERT_CALL_METHOD;
2943
2944 len = strlen(methname);
2945 sv = flags & G_METHOD_NAMED
2946 ? sv_2mortal(newSVpvn_share(methname, len,0))
2947 : newSVpvn_flags(methname, len, SVs_TEMP);
2948
2949 return call_sv(sv, flags | G_METHOD);
2950 }
2951
2952 /* May be called with any of a CV, a GV, or an SV containing the name. */
2953 /*
2954 =for apidoc call_sv
2955
2956 Performs a callback to the Perl sub specified by the SV.
2957
2958 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2959 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2960 or C<SvPV(sv)> will be used as the name of the sub to call.
2961
2962 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2963 C<SvPV(sv)> will be used as the name of the method to call.
2964
2965 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2966 the name of the method to call.
2967
2968 Some other values are treated specially for internal use and should
2969 not be depended on.
2970
2971 See L<perlcall>.
2972
2973 =for apidoc Amnh||G_METHOD
2974 =for apidoc Amnh||G_METHOD_NAMED
2975
2976 =cut
2977 */
2978
2979 I32
Perl_call_sv(pTHX_ SV * sv,volatile I32 flags)2980 Perl_call_sv(pTHX_ SV *sv, volatile I32 flags)
2981 /* See G_* flags in cop.h */
2982 {
2983 LOGOP myop; /* fake syntax tree node */
2984 METHOP method_op;
2985 I32 oldmark;
2986 volatile I32 retval = 0;
2987 bool oldcatch = CATCH_GET;
2988 int ret;
2989 OP* const oldop = PL_op;
2990 dJMPENV;
2991
2992 PERL_ARGS_ASSERT_CALL_SV;
2993
2994 if (flags & G_DISCARD) {
2995 ENTER;
2996 SAVETMPS;
2997 }
2998 if (!(flags & G_WANT)) {
2999 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
3000 */
3001 flags |= G_SCALAR;
3002 }
3003
3004 Zero(&myop, 1, LOGOP);
3005 if (!(flags & G_NOARGS))
3006 myop.op_flags |= OPf_STACKED;
3007 myop.op_flags |= OP_GIMME_REVERSE(flags);
3008 SAVEOP();
3009 PL_op = (OP*)&myop;
3010
3011 if (!(flags & G_METHOD_NAMED)) {
3012 dSP;
3013 EXTEND(SP, 1);
3014 PUSHs(sv);
3015 PUTBACK;
3016 }
3017 oldmark = TOPMARK;
3018
3019 if (PERLDB_SUB && PL_curstash != PL_debstash
3020 /* Handle first BEGIN of -d. */
3021 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
3022 /* Try harder, since this may have been a sighandler, thus
3023 * curstash may be meaningless. */
3024 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
3025 && !(flags & G_NODEBUG))
3026 myop.op_private |= OPpENTERSUB_DB;
3027
3028 if (flags & (G_METHOD|G_METHOD_NAMED)) {
3029 Zero(&method_op, 1, METHOP);
3030 method_op.op_next = (OP*)&myop;
3031 PL_op = (OP*)&method_op;
3032 if ( flags & G_METHOD_NAMED ) {
3033 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
3034 method_op.op_type = OP_METHOD_NAMED;
3035 method_op.op_u.op_meth_sv = sv;
3036 } else {
3037 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
3038 method_op.op_type = OP_METHOD;
3039 }
3040 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
3041 myop.op_type = OP_ENTERSUB;
3042 }
3043
3044 if (!(flags & G_EVAL)) {
3045 CATCH_SET(TRUE);
3046 CALL_BODY_SUB((OP*)&myop);
3047 retval = PL_stack_sp - (PL_stack_base + oldmark);
3048 CATCH_SET(oldcatch);
3049 }
3050 else {
3051 I32 old_cxix;
3052 myop.op_other = (OP*)&myop;
3053 (void)POPMARK;
3054 old_cxix = cxstack_ix;
3055 create_eval_scope(NULL, flags|G_FAKINGEVAL);
3056 INCMARK;
3057
3058 JMPENV_PUSH(ret);
3059
3060 switch (ret) {
3061 case 0:
3062 redo_body:
3063 CALL_BODY_SUB((OP*)&myop);
3064 retval = PL_stack_sp - (PL_stack_base + oldmark);
3065 if (!(flags & G_KEEPERR)) {
3066 CLEAR_ERRSV();
3067 }
3068 break;
3069 case 1:
3070 STATUS_ALL_FAILURE;
3071 /* FALLTHROUGH */
3072 case 2:
3073 /* my_exit() was called */
3074 SET_CURSTASH(PL_defstash);
3075 FREETMPS;
3076 JMPENV_POP;
3077 my_exit_jump();
3078 NOT_REACHED; /* NOTREACHED */
3079 case 3:
3080 if (PL_restartop) {
3081 PL_restartjmpenv = NULL;
3082 PL_op = PL_restartop;
3083 PL_restartop = 0;
3084 goto redo_body;
3085 }
3086 PL_stack_sp = PL_stack_base + oldmark;
3087 if ((flags & G_WANT) == G_ARRAY)
3088 retval = 0;
3089 else {
3090 retval = 1;
3091 *++PL_stack_sp = &PL_sv_undef;
3092 }
3093 break;
3094 }
3095
3096 /* if we croaked, depending on how we croaked the eval scope
3097 * may or may not have already been popped */
3098 if (cxstack_ix > old_cxix) {
3099 assert(cxstack_ix == old_cxix + 1);
3100 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
3101 delete_eval_scope();
3102 }
3103 JMPENV_POP;
3104 }
3105
3106 if (flags & G_DISCARD) {
3107 PL_stack_sp = PL_stack_base + oldmark;
3108 retval = 0;
3109 FREETMPS;
3110 LEAVE;
3111 }
3112 PL_op = oldop;
3113 return retval;
3114 }
3115
3116 /* Eval a string. The G_EVAL flag is always assumed. */
3117
3118 /*
3119 =for apidoc eval_sv
3120
3121 Tells Perl to C<eval> the string in the SV. It supports the same flags
3122 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
3123
3124 The C<G_RETHROW> flag can be used if you only need eval_sv() to
3125 execute code specified by a string, but not catch any errors.
3126
3127 =for apidoc Amnh||G_RETHROW
3128 =cut
3129 */
3130
3131 I32
Perl_eval_sv(pTHX_ SV * sv,I32 flags)3132 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
3133
3134 /* See G_* flags in cop.h */
3135 {
3136 UNOP myop; /* fake syntax tree node */
3137 volatile I32 oldmark;
3138 volatile I32 retval = 0;
3139 int ret;
3140 OP* const oldop = PL_op;
3141 dJMPENV;
3142
3143 PERL_ARGS_ASSERT_EVAL_SV;
3144
3145 if (flags & G_DISCARD) {
3146 ENTER;
3147 SAVETMPS;
3148 }
3149
3150 SAVEOP();
3151 PL_op = (OP*)&myop;
3152 Zero(&myop, 1, UNOP);
3153 {
3154 dSP;
3155 oldmark = SP - PL_stack_base;
3156 EXTEND(SP, 1);
3157 PUSHs(sv);
3158 PUTBACK;
3159 }
3160
3161 if (!(flags & G_NOARGS))
3162 myop.op_flags = OPf_STACKED;
3163 myop.op_type = OP_ENTEREVAL;
3164 myop.op_flags |= OP_GIMME_REVERSE(flags);
3165 if (flags & G_KEEPERR)
3166 myop.op_flags |= OPf_SPECIAL;
3167
3168 if (flags & G_RE_REPARSING)
3169 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
3170
3171 /* fail now; otherwise we could fail after the JMPENV_PUSH but
3172 * before a cx_pusheval(), which corrupts the stack after a croak */
3173 TAINT_PROPER("eval_sv()");
3174
3175 JMPENV_PUSH(ret);
3176 switch (ret) {
3177 case 0:
3178 redo_body:
3179 if (PL_op == (OP*)(&myop)) {
3180 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
3181 if (!PL_op)
3182 goto fail; /* failed in compilation */
3183 }
3184 CALLRUNOPS(aTHX);
3185 retval = PL_stack_sp - (PL_stack_base + oldmark);
3186 if (!(flags & G_KEEPERR)) {
3187 CLEAR_ERRSV();
3188 }
3189 break;
3190 case 1:
3191 STATUS_ALL_FAILURE;
3192 /* FALLTHROUGH */
3193 case 2:
3194 /* my_exit() was called */
3195 SET_CURSTASH(PL_defstash);
3196 FREETMPS;
3197 JMPENV_POP;
3198 my_exit_jump();
3199 NOT_REACHED; /* NOTREACHED */
3200 case 3:
3201 if (PL_restartop) {
3202 PL_restartjmpenv = NULL;
3203 PL_op = PL_restartop;
3204 PL_restartop = 0;
3205 goto redo_body;
3206 }
3207 fail:
3208 if (flags & G_RETHROW) {
3209 JMPENV_POP;
3210 croak_sv(ERRSV);
3211 }
3212
3213 PL_stack_sp = PL_stack_base + oldmark;
3214 if ((flags & G_WANT) == G_ARRAY)
3215 retval = 0;
3216 else {
3217 retval = 1;
3218 *++PL_stack_sp = &PL_sv_undef;
3219 }
3220 break;
3221 }
3222
3223 JMPENV_POP;
3224 if (flags & G_DISCARD) {
3225 PL_stack_sp = PL_stack_base + oldmark;
3226 retval = 0;
3227 FREETMPS;
3228 LEAVE;
3229 }
3230 PL_op = oldop;
3231 return retval;
3232 }
3233
3234 /*
3235 =for apidoc eval_pv
3236
3237 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3238
3239 =cut
3240 */
3241
3242 SV*
Perl_eval_pv(pTHX_ const char * p,I32 croak_on_error)3243 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3244 {
3245 SV* sv = newSVpv(p, 0);
3246
3247 PERL_ARGS_ASSERT_EVAL_PV;
3248
3249 if (croak_on_error) {
3250 sv_2mortal(sv);
3251 eval_sv(sv, G_SCALAR | G_RETHROW);
3252 }
3253 else {
3254 eval_sv(sv, G_SCALAR);
3255 SvREFCNT_dec(sv);
3256 }
3257
3258 {
3259 dSP;
3260 sv = POPs;
3261 PUTBACK;
3262 }
3263
3264 return sv;
3265 }
3266
3267 /* Require a module. */
3268
3269 /*
3270 =for apidoc_section $embedding
3271
3272 =for apidoc require_pv
3273
3274 Tells Perl to C<require> the file named by the string argument. It is
3275 analogous to the Perl code C<eval "require '$file'">. It's even
3276 implemented that way; consider using load_module instead.
3277
3278 =cut */
3279
3280 void
Perl_require_pv(pTHX_ const char * pv)3281 Perl_require_pv(pTHX_ const char *pv)
3282 {
3283 dSP;
3284 SV* sv;
3285
3286 PERL_ARGS_ASSERT_REQUIRE_PV;
3287
3288 PUSHSTACKi(PERLSI_REQUIRE);
3289 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3290 eval_sv(sv_2mortal(sv), G_DISCARD);
3291 POPSTACK;
3292 }
3293
3294 STATIC void
S_usage(pTHX)3295 S_usage(pTHX) /* XXX move this out into a module ? */
3296 {
3297 /* This message really ought to be max 23 lines.
3298 * Removed -h because the user already knows that option. Others? */
3299
3300 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3301 minimum of 509 character string literals. */
3302 static const char * const usage_msg[] = {
3303 " -0[octal/hexadecimal] specify record separator (\\0, if no argument)\n"
3304 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3305 " -C[number/list] enables the listed Unicode features\n"
3306 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3307 " -d[t][:MOD] run program under debugger or module Devel::MOD\n"
3308 " -D[number/letters] set debugging flags (argument is a bit mask or alphabets)\n",
3309 " -e commandline one line of program (several -e's allowed, omit programfile)\n"
3310 " -E commandline like -e, but enables all optional features\n"
3311 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3312 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3313 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3314 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3315 " -l[octnum] enable line ending processing, specifies line terminator\n"
3316 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3317 " -n assume \"while (<>) { ... }\" loop around program\n"
3318 " -p assume loop like -n but print line also, like sed\n"
3319 " -s enable rudimentary parsing for switches after programfile\n"
3320 " -S look for programfile using PATH environment variable\n",
3321 " -t enable tainting warnings\n"
3322 " -T enable tainting checks\n"
3323 " -u dump core after parsing program\n"
3324 " -U allow unsafe operations\n"
3325 " -v print version, patchlevel and license\n"
3326 " -V[:configvar] print configuration summary (or a single Config.pm variable)\n",
3327 " -w enable many useful warnings\n"
3328 " -W enable all warnings\n"
3329 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3330 " -X disable all warnings\n"
3331 " \n"
3332 "Run 'perldoc perl' for more help with Perl.\n\n",
3333 NULL
3334 };
3335 const char * const *p = usage_msg;
3336 PerlIO *out = PerlIO_stdout();
3337
3338 PerlIO_printf(out,
3339 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3340 PL_origargv[0]);
3341 while (*p)
3342 PerlIO_puts(out, *p++);
3343 my_exit(0);
3344 }
3345
3346 /* convert a string of -D options (or digits) into an int.
3347 * sets *s to point to the char after the options */
3348
3349 #ifdef DEBUGGING
3350 int
Perl_get_debug_opts(pTHX_ const char ** s,bool givehelp)3351 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3352 {
3353 static const char * const usage_msgd[] = {
3354 " Debugging flag values: (see also -d)\n"
3355 " p Tokenizing and parsing (with v, displays parse stack)\n"
3356 " s Stack snapshots (with v, displays all stacks)\n"
3357 " l Context (loop) stack processing\n"
3358 " t Trace execution\n"
3359 " o Method and overloading resolution\n",
3360 " c String/numeric conversions\n"
3361 " P Print profiling info, source file input state\n"
3362 " m Memory and SV allocation\n"
3363 " f Format processing\n"
3364 " r Regular expression parsing and execution\n"
3365 " x Syntax tree dump\n",
3366 " u Tainting checks\n"
3367 " H Hash dump -- usurps values()\n"
3368 " X Scratchpad allocation\n"
3369 " D Cleaning up\n"
3370 " S Op slab allocation\n"
3371 " T Tokenising\n"
3372 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3373 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3374 " v Verbose: use in conjunction with other flags\n"
3375 " C Copy On Write\n"
3376 " A Consistency checks on internal structures\n"
3377 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3378 " M trace smart match resolution\n"
3379 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3380 " L trace some locale setting information--for Perl core development\n",
3381 " i trace PerlIO layer processing\n",
3382 " y trace y///, tr/// compilation and execution\n",
3383 NULL
3384 };
3385 UV uv = 0;
3386
3387 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3388
3389 if (isALPHA(**s)) {
3390 /* if adding extra options, remember to update DEBUG_MASK */
3391 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLiy";
3392
3393 for (; isWORDCHAR(**s); (*s)++) {
3394 const char * const d = strchr(debopts,**s);
3395 if (d)
3396 uv |= 1 << (d - debopts);
3397 else if (ckWARN_d(WARN_DEBUGGING))
3398 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3399 "invalid option -D%c, use -D'' to see choices\n", **s);
3400 }
3401 }
3402 else if (isDIGIT(**s)) {
3403 const char* e = *s + strlen(*s);
3404 if (grok_atoUV(*s, &uv, &e))
3405 *s = e;
3406 for (; isWORDCHAR(**s); (*s)++) ;
3407 }
3408 else if (givehelp) {
3409 const char *const *p = usage_msgd;
3410 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3411 }
3412 return (int)uv; /* ignore any UV->int conversion loss */
3413 }
3414 #endif
3415
3416 /* This routine handles any switches that can be given during run */
3417
3418 const char *
Perl_moreswitches(pTHX_ const char * s)3419 Perl_moreswitches(pTHX_ const char *s)
3420 {
3421 UV rschar;
3422 const char option = *s; /* used to remember option in -m/-M code */
3423
3424 PERL_ARGS_ASSERT_MORESWITCHES;
3425
3426 switch (*s) {
3427 case '0':
3428 {
3429 I32 flags = 0;
3430 STRLEN numlen;
3431
3432 SvREFCNT_dec(PL_rs);
3433 if (s[1] == 'x' && s[2]) {
3434 const char *e = s+=2;
3435 U8 *tmps;
3436
3437 while (*e)
3438 e++;
3439 numlen = e - s;
3440 flags = PERL_SCAN_SILENT_ILLDIGIT;
3441 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3442 if (s + numlen < e) {
3443 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3444 numlen = 0;
3445 s--;
3446 }
3447 PL_rs = newSVpvs("");
3448 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3449 uvchr_to_utf8(tmps, rschar);
3450 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3451 SvUTF8_on(PL_rs);
3452 }
3453 else {
3454 numlen = 4;
3455 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3456 if (rschar & ~((U8)~0))
3457 PL_rs = &PL_sv_undef;
3458 else if (!rschar && numlen >= 2)
3459 PL_rs = newSVpvs("");
3460 else {
3461 char ch = (char)rschar;
3462 PL_rs = newSVpvn(&ch, 1);
3463 }
3464 }
3465 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3466 return s + numlen;
3467 }
3468 case 'C':
3469 s++;
3470 PL_unicode = parse_unicode_opts( (const char **)&s );
3471 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3472 PL_utf8cache = -1;
3473 return s;
3474 case 'F':
3475 PL_minus_a = TRUE;
3476 PL_minus_F = TRUE;
3477 PL_minus_n = TRUE;
3478 PL_splitstr = ++s;
3479 while (*s && !isSPACE(*s)) ++s;
3480 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3481 return s;
3482 case 'a':
3483 PL_minus_a = TRUE;
3484 PL_minus_n = TRUE;
3485 s++;
3486 return s;
3487 case 'c':
3488 PL_minus_c = TRUE;
3489 s++;
3490 return s;
3491 case 'd':
3492 forbid_setid('d', FALSE);
3493 s++;
3494
3495 /* -dt indicates to the debugger that threads will be used */
3496 if (*s == 't' && !isWORDCHAR(s[1])) {
3497 ++s;
3498 my_setenv("PERL5DB_THREADED", "1");
3499 }
3500
3501 /* The following permits -d:Mod to accepts arguments following an =
3502 in the fashion that -MSome::Mod does. */
3503 if (*s == ':' || *s == '=') {
3504 const char *start;
3505 const char *end;
3506 SV *sv;
3507
3508 if (*++s == '-') {
3509 ++s;
3510 sv = newSVpvs("no Devel::");
3511 } else {
3512 sv = newSVpvs("use Devel::");
3513 }
3514
3515 start = s;
3516 end = s + strlen(s);
3517
3518 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3519 while(isWORDCHAR(*s) || *s==':') ++s;
3520 if (*s != '=')
3521 sv_catpvn(sv, start, end - start);
3522 else {
3523 sv_catpvn(sv, start, s-start);
3524 /* Don't use NUL as q// delimiter here, this string goes in the
3525 * environment. */
3526 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3527 }
3528 s = end;
3529 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3530 SvREFCNT_dec(sv);
3531 }
3532 if (!PL_perldb) {
3533 PL_perldb = PERLDB_ALL;
3534 init_debugger();
3535 }
3536 return s;
3537 case 'D':
3538 {
3539 #ifdef DEBUGGING
3540 forbid_setid('D', FALSE);
3541 s++;
3542 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3543 #else /* !DEBUGGING */
3544 if (ckWARN_d(WARN_DEBUGGING))
3545 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3546 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3547 for (s++; isWORDCHAR(*s); s++) ;
3548 #endif
3549 return s;
3550 NOT_REACHED; /* NOTREACHED */
3551 }
3552 case 'h':
3553 usage();
3554 NOT_REACHED; /* NOTREACHED */
3555
3556 case 'i':
3557 Safefree(PL_inplace);
3558 {
3559 const char * const start = ++s;
3560 while (*s && !isSPACE(*s))
3561 ++s;
3562
3563 PL_inplace = savepvn(start, s - start);
3564 }
3565 return s;
3566 case 'I': /* -I handled both here and in parse_body() */
3567 forbid_setid('I', FALSE);
3568 ++s;
3569 while (*s && isSPACE(*s))
3570 ++s;
3571 if (*s) {
3572 const char *e, *p;
3573 p = s;
3574 /* ignore trailing spaces (possibly followed by other switches) */
3575 do {
3576 for (e = p; *e && !isSPACE(*e); e++) ;
3577 p = e;
3578 while (isSPACE(*p))
3579 p++;
3580 } while (*p && *p != '-');
3581 incpush(s, e-s,
3582 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3583 s = p;
3584 if (*s == '-')
3585 s++;
3586 }
3587 else
3588 Perl_croak(aTHX_ "No directory specified for -I");
3589 return s;
3590 case 'l':
3591 PL_minus_l = TRUE;
3592 s++;
3593 if (PL_ors_sv) {
3594 SvREFCNT_dec(PL_ors_sv);
3595 PL_ors_sv = NULL;
3596 }
3597 if (isDIGIT(*s)) {
3598 I32 flags = 0;
3599 STRLEN numlen;
3600 PL_ors_sv = newSVpvs("\n");
3601 numlen = 3 + (*s == '0');
3602 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3603 s += numlen;
3604 }
3605 else {
3606 if (RsPARA(PL_rs)) {
3607 PL_ors_sv = newSVpvs("\n\n");
3608 }
3609 else {
3610 PL_ors_sv = newSVsv(PL_rs);
3611 }
3612 }
3613 return s;
3614 case 'M':
3615 forbid_setid('M', FALSE); /* XXX ? */
3616 /* FALLTHROUGH */
3617 case 'm':
3618 forbid_setid('m', FALSE); /* XXX ? */
3619 if (*++s) {
3620 const char *start;
3621 const char *end;
3622 SV *sv;
3623 const char *use = "use ";
3624 bool colon = FALSE;
3625 /* -M-foo == 'no foo' */
3626 /* Leading space on " no " is deliberate, to make both
3627 possibilities the same length. */
3628 if (*s == '-') { use = " no "; ++s; }
3629 sv = newSVpvn(use,4);
3630 start = s;
3631 /* We allow -M'Module qw(Foo Bar)' */
3632 while(isWORDCHAR(*s) || *s==':') {
3633 if( *s++ == ':' ) {
3634 if( *s == ':' )
3635 s++;
3636 else
3637 colon = TRUE;
3638 }
3639 }
3640 if (s == start)
3641 Perl_croak(aTHX_ "Module name required with -%c option",
3642 option);
3643 if (colon)
3644 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3645 "contains single ':'",
3646 (int)(s - start), start, option);
3647 end = s + strlen(s);
3648 if (*s != '=') {
3649 sv_catpvn(sv, start, end - start);
3650 if (option == 'm') {
3651 if (*s != '\0')
3652 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3653 sv_catpvs( sv, " ()");
3654 }
3655 } else {
3656 sv_catpvn(sv, start, s-start);
3657 /* Use NUL as q''-delimiter. */
3658 sv_catpvs(sv, " split(/,/,q\0");
3659 ++s;
3660 sv_catpvn(sv, s, end - s);
3661 sv_catpvs(sv, "\0)");
3662 }
3663 s = end;
3664 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3665 }
3666 else
3667 Perl_croak(aTHX_ "Missing argument to -%c", option);
3668 return s;
3669 case 'n':
3670 PL_minus_n = TRUE;
3671 s++;
3672 return s;
3673 case 'p':
3674 PL_minus_p = TRUE;
3675 s++;
3676 return s;
3677 case 's':
3678 forbid_setid('s', FALSE);
3679 PL_doswitches = TRUE;
3680 s++;
3681 return s;
3682 case 't':
3683 case 'T':
3684 #if defined(SILENT_NO_TAINT_SUPPORT)
3685 /* silently ignore */
3686 #elif defined(NO_TAINT_SUPPORT)
3687 Perl_croak_nocontext("This perl was compiled without taint support. "
3688 "Cowardly refusing to run with -t or -T flags");
3689 #else
3690 if (!TAINTING_get)
3691 TOO_LATE_FOR(*s);
3692 #endif
3693 s++;
3694 return s;
3695 case 'u':
3696 PL_do_undump = TRUE;
3697 s++;
3698 return s;
3699 case 'U':
3700 PL_unsafe = TRUE;
3701 s++;
3702 return s;
3703 case 'v':
3704 minus_v();
3705 case 'w':
3706 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3707 PL_dowarn |= G_WARN_ON;
3708 }
3709 s++;
3710 return s;
3711 case 'W':
3712 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3713 free_and_set_cop_warnings(&PL_compiling, pWARN_ALL);
3714 s++;
3715 return s;
3716 case 'X':
3717 PL_dowarn = G_WARN_ALL_OFF;
3718 free_and_set_cop_warnings(&PL_compiling, pWARN_NONE);
3719 s++;
3720 return s;
3721 case '*':
3722 case ' ':
3723 while( *s == ' ' )
3724 ++s;
3725 if (s[0] == '-') /* Additional switches on #! line. */
3726 return s+1;
3727 break;
3728 case '-':
3729 case 0:
3730 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3731 case '\r':
3732 #endif
3733 case '\n':
3734 case '\t':
3735 break;
3736 #ifdef ALTERNATE_SHEBANG
3737 case 'S': /* OS/2 needs -S on "extproc" line. */
3738 break;
3739 #endif
3740 case 'e': case 'f': case 'x': case 'E':
3741 #ifndef ALTERNATE_SHEBANG
3742 case 'S':
3743 #endif
3744 case 'V':
3745 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3746 default:
3747 Perl_croak(aTHX_
3748 "Unrecognized switch: -%.1s (-h will show valid options)",s
3749 );
3750 }
3751 return NULL;
3752 }
3753
3754
3755 STATIC void
S_minus_v(pTHX)3756 S_minus_v(pTHX)
3757 {
3758 PerlIO * PIO_stdout;
3759 {
3760 const char * const level_str = "v" PERL_VERSION_STRING;
3761 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3762 #ifdef PERL_PATCHNUM
3763 SV* level;
3764 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3765 static const char num [] = PERL_PATCHNUM "*";
3766 # else
3767 static const char num [] = PERL_PATCHNUM;
3768 # endif
3769 {
3770 const STRLEN num_len = sizeof(num)-1;
3771 /* A very advanced compiler would fold away the strnEQ
3772 and this whole conditional, but most (all?) won't do it.
3773 SV level could also be replaced by with preprocessor
3774 catenation.
3775 */
3776 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3777 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3778 of the interp so it might contain format characters
3779 */
3780 level = newSVpvn(num, num_len);
3781 } else {
3782 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3783 }
3784 }
3785 #else
3786 SV* level = newSVpvn(level_str, level_len);
3787 #endif /* #ifdef PERL_PATCHNUM */
3788 PIO_stdout = PerlIO_stdout();
3789 PerlIO_printf(PIO_stdout,
3790 "\nThis is perl " STRINGIFY(PERL_REVISION)
3791 ", version " STRINGIFY(PERL_VERSION)
3792 ", subversion " STRINGIFY(PERL_SUBVERSION)
3793 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3794 );
3795 SvREFCNT_dec_NN(level);
3796 }
3797 #if defined(LOCAL_PATCH_COUNT)
3798 if (LOCAL_PATCH_COUNT > 0)
3799 PerlIO_printf(PIO_stdout,
3800 "\n(with %d registered patch%s, "
3801 "see perl -V for more detail)",
3802 LOCAL_PATCH_COUNT,
3803 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3804 #endif
3805
3806 PerlIO_printf(PIO_stdout,
3807 "\n\nCopyright 1987-2021, Larry Wall\n");
3808 #ifdef MSDOS
3809 PerlIO_printf(PIO_stdout,
3810 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3811 #endif
3812 #ifdef DJGPP
3813 PerlIO_printf(PIO_stdout,
3814 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3815 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3816 #endif
3817 #ifdef OS2
3818 PerlIO_printf(PIO_stdout,
3819 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3820 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3821 #endif
3822 #ifdef OEMVS
3823 PerlIO_printf(PIO_stdout,
3824 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3825 #endif
3826 #ifdef __VOS__
3827 PerlIO_printf(PIO_stdout,
3828 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3829 #endif
3830 #ifdef POSIX_BC
3831 PerlIO_printf(PIO_stdout,
3832 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3833 #endif
3834 #ifdef BINARY_BUILD_NOTICE
3835 BINARY_BUILD_NOTICE;
3836 #endif
3837 PerlIO_printf(PIO_stdout,
3838 "\n\
3839 Perl may be copied only under the terms of either the Artistic License or the\n\
3840 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3841 Complete documentation for Perl, including FAQ lists, should be found on\n\
3842 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3843 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3844 my_exit(0);
3845 }
3846
3847 /* compliments of Tom Christiansen */
3848
3849 /* unexec() can be found in the Gnu emacs distribution */
3850 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3851
3852 #ifdef VMS
3853 #include <lib$routines.h>
3854 #endif
3855
3856 void
Perl_my_unexec(pTHX)3857 Perl_my_unexec(pTHX)
3858 {
3859 #ifdef UNEXEC
3860 SV * prog = newSVpv(BIN_EXP, 0);
3861 SV * file = newSVpv(PL_origfilename, 0);
3862 int status = 1;
3863 extern int etext;
3864
3865 sv_catpvs(prog, "/perl");
3866 sv_catpvs(file, ".perldump");
3867
3868 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3869 /* unexec prints msg to stderr in case of failure */
3870 PerlProc_exit(status);
3871 #else
3872 PERL_UNUSED_CONTEXT;
3873 # ifdef VMS
3874 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3875 # elif defined(WIN32) || defined(__CYGWIN__)
3876 Perl_croak_nocontext("dump is not supported");
3877 # else
3878 ABORT(); /* for use with undump */
3879 # endif
3880 #endif
3881 }
3882
3883 /* initialize curinterp */
3884 STATIC void
S_init_interp(pTHX)3885 S_init_interp(pTHX)
3886 {
3887 #ifdef MULTIPLICITY
3888 # define PERLVAR(prefix,var,type)
3889 # define PERLVARA(prefix,var,n,type)
3890 # if defined(PERL_IMPLICIT_CONTEXT)
3891 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3892 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3893 # else
3894 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3895 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3896 # endif
3897 # include "intrpvar.h"
3898 # undef PERLVAR
3899 # undef PERLVARA
3900 # undef PERLVARI
3901 # undef PERLVARIC
3902 #else
3903 # define PERLVAR(prefix,var,type)
3904 # define PERLVARA(prefix,var,n,type)
3905 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3906 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3907 # include "intrpvar.h"
3908 # undef PERLVAR
3909 # undef PERLVARA
3910 # undef PERLVARI
3911 # undef PERLVARIC
3912 #endif
3913
3914 }
3915
3916 STATIC void
S_init_main_stash(pTHX)3917 S_init_main_stash(pTHX)
3918 {
3919 GV *gv;
3920 HV *hv = newHV();
3921
3922 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(hv);
3923 /* We know that the string "main" will be in the global shared string
3924 table, so it's a small saving to use it rather than allocate another
3925 8 bytes. */
3926 PL_curstname = newSVpvs_share("main");
3927 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3928 /* If we hadn't caused another reference to "main" to be in the shared
3929 string table above, then it would be worth reordering these two,
3930 because otherwise all we do is delete "main" from it as a consequence
3931 of the SvREFCNT_dec, only to add it again with hv_name_set */
3932 SvREFCNT_dec(GvHV(gv));
3933 hv_name_sets(PL_defstash, "main", 0);
3934 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3935 SvREADONLY_on(gv);
3936 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3937 SVt_PVAV)));
3938 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3939 GvMULTI_on(PL_incgv);
3940 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3941 SvREFCNT_inc_simple_void(PL_hintgv);
3942 GvMULTI_on(PL_hintgv);
3943 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3944 SvREFCNT_inc_simple_void(PL_defgv);
3945 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3946 SvREFCNT_inc_simple_void(PL_errgv);
3947 GvMULTI_on(PL_errgv);
3948 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3949 SvREFCNT_inc_simple_void(PL_replgv);
3950 GvMULTI_on(PL_replgv);
3951 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3952 #ifdef PERL_DONT_CREATE_GVSV
3953 (void)gv_SVadd(PL_errgv);
3954 #endif
3955 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3956 CLEAR_ERRSV();
3957 CopSTASH_set(&PL_compiling, PL_defstash);
3958 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3959 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3960 SVt_PVHV));
3961 /* We must init $/ before switches are processed. */
3962 sv_setpvs(get_sv("/", GV_ADD), "\n");
3963 }
3964
3965 STATIC PerlIO *
S_open_script(pTHX_ const char * scriptname,bool dosearch,bool * suidscript)3966 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3967 {
3968 int fdscript = -1;
3969 PerlIO *rsfp = NULL;
3970 Stat_t tmpstatbuf;
3971 int fd;
3972
3973 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3974
3975 if (PL_e_script) {
3976 PL_origfilename = savepvs("-e");
3977 }
3978 else {
3979 const char *s;
3980 UV uv;
3981 /* if find_script() returns, it returns a malloc()-ed value */
3982 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3983 s = scriptname + strlen(scriptname);
3984
3985 if (strBEGINs(scriptname, "/dev/fd/")
3986 && isDIGIT(scriptname[8])
3987 && grok_atoUV(scriptname + 8, &uv, &s)
3988 && uv <= PERL_INT_MAX
3989 ) {
3990 fdscript = (int)uv;
3991 if (*s) {
3992 /* PSz 18 Feb 04
3993 * Tell apart "normal" usage of fdscript, e.g.
3994 * with bash on FreeBSD:
3995 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3996 * from usage in suidperl.
3997 * Does any "normal" usage leave garbage after the number???
3998 * Is it a mistake to use a similar /dev/fd/ construct for
3999 * suidperl?
4000 */
4001 *suidscript = TRUE;
4002 /* PSz 20 Feb 04
4003 * Be supersafe and do some sanity-checks.
4004 * Still, can we be sure we got the right thing?
4005 */
4006 if (*s != '/') {
4007 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
4008 }
4009 if (! *(s+1)) {
4010 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
4011 }
4012 scriptname = savepv(s + 1);
4013 Safefree(PL_origfilename);
4014 PL_origfilename = (char *)scriptname;
4015 }
4016 }
4017 }
4018
4019 CopFILE_free(PL_curcop);
4020 CopFILE_set(PL_curcop, PL_origfilename);
4021 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
4022 scriptname = (char *)"";
4023 if (fdscript >= 0) {
4024 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
4025 }
4026 else if (!*scriptname) {
4027 forbid_setid(0, *suidscript);
4028 return NULL;
4029 }
4030 else {
4031 #ifdef FAKE_BIT_BUCKET
4032 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
4033 * is called) and still have the "-e" work. (Believe it or not,
4034 * a /dev/null is required for the "-e" to work because source
4035 * filter magic is used to implement it. ) This is *not* a general
4036 * replacement for a /dev/null. What we do here is create a temp
4037 * file (an empty file), open up that as the script, and then
4038 * immediately close and unlink it. Close enough for jazz. */
4039 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
4040 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
4041 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
4042 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
4043 FAKE_BIT_BUCKET_TEMPLATE
4044 };
4045 const char * const err = "Failed to create a fake bit bucket";
4046 if (strEQ(scriptname, BIT_BUCKET)) {
4047 int tmpfd = Perl_my_mkstemp_cloexec(tmpname);
4048 if (tmpfd > -1) {
4049 scriptname = tmpname;
4050 close(tmpfd);
4051 } else
4052 Perl_croak(aTHX_ err);
4053 }
4054 #endif
4055 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
4056 #ifdef FAKE_BIT_BUCKET
4057 if ( strBEGINs(scriptname, FAKE_BIT_BUCKET_PREFIX)
4058 && strlen(scriptname) == sizeof(tmpname) - 1)
4059 {
4060 unlink(scriptname);
4061 }
4062 scriptname = BIT_BUCKET;
4063 #endif
4064 }
4065 if (!rsfp) {
4066 /* PSz 16 Sep 03 Keep neat error message */
4067 if (PL_e_script)
4068 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
4069 else
4070 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4071 CopFILE(PL_curcop), Strerror(errno));
4072 }
4073 fd = PerlIO_fileno(rsfp);
4074
4075 if (fd < 0 ||
4076 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
4077 && S_ISDIR(tmpstatbuf.st_mode)))
4078 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4079 CopFILE(PL_curcop),
4080 Strerror(EISDIR));
4081
4082 return rsfp;
4083 }
4084
4085 /* In the days of suidperl, we refused to execute a setuid script stored on
4086 * a filesystem mounted nosuid and/or noexec. This meant that we probed for the
4087 * existence of the appropriate filesystem-statting function, and behaved
4088 * accordingly. But even though suidperl is long gone, we must still include
4089 * those probes for the benefit of modules like Filesys::Df, which expect the
4090 * results of those probes to be stored in %Config; see RT#126368. So mention
4091 * the relevant cpp symbols here, to ensure that metaconfig will include their
4092 * probes in the generated Configure:
4093 *
4094 * I_SYSSTATVFS HAS_FSTATVFS
4095 * I_SYSMOUNT
4096 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
4097 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
4098 */
4099
4100
4101 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4102 /* Don't even need this function. */
4103 #else
4104 STATIC void
S_validate_suid(pTHX_ PerlIO * rsfp)4105 S_validate_suid(pTHX_ PerlIO *rsfp)
4106 {
4107 const Uid_t my_uid = PerlProc_getuid();
4108 const Uid_t my_euid = PerlProc_geteuid();
4109 const Gid_t my_gid = PerlProc_getgid();
4110 const Gid_t my_egid = PerlProc_getegid();
4111
4112 PERL_ARGS_ASSERT_VALIDATE_SUID;
4113
4114 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
4115 int fd = PerlIO_fileno(rsfp);
4116 Stat_t statbuf;
4117 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
4118 Perl_croak_nocontext( "Illegal suidscript");
4119 }
4120 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
4121 ||
4122 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
4123 )
4124 if (!PL_do_undump)
4125 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4126 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4127 /* not set-id, must be wrapped */
4128 }
4129 }
4130 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4131
4132 STATIC void
S_find_beginning(pTHX_ SV * linestr_sv,PerlIO * rsfp)4133 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4134 {
4135 const char *s;
4136 const char *s2;
4137
4138 PERL_ARGS_ASSERT_FIND_BEGINNING;
4139
4140 /* skip forward in input to the real script? */
4141
4142 do {
4143 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4144 Perl_croak(aTHX_ "No Perl script found in input\n");
4145 s2 = s;
4146 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
4147 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4148 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4149 s2 = s;
4150 while (*s == ' ' || *s == '\t') s++;
4151 if (*s++ == '-') {
4152 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4153 || s2[-1] == '_') s2--;
4154 if (strBEGINs(s2-4,"perl"))
4155 while ((s = moreswitches(s)))
4156 ;
4157 }
4158 }
4159
4160
4161 STATIC void
S_init_ids(pTHX)4162 S_init_ids(pTHX)
4163 {
4164 /* no need to do anything here any more if we don't
4165 * do tainting. */
4166 #ifndef NO_TAINT_SUPPORT
4167 const Uid_t my_uid = PerlProc_getuid();
4168 const Uid_t my_euid = PerlProc_geteuid();
4169 const Gid_t my_gid = PerlProc_getgid();
4170 const Gid_t my_egid = PerlProc_getegid();
4171
4172 PERL_UNUSED_CONTEXT;
4173
4174 /* Should not happen: */
4175 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
4176 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
4177 #endif
4178 /* BUG */
4179 /* PSz 27 Feb 04
4180 * Should go by suidscript, not uid!=euid: why disallow
4181 * system("ls") in scripts run from setuid things?
4182 * Or, is this run before we check arguments and set suidscript?
4183 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4184 * (We never have suidscript, can we be sure to have fdscript?)
4185 * Or must then go by UID checks? See comments in forbid_setid also.
4186 */
4187 }
4188
4189 /* This is used very early in the lifetime of the program,
4190 * before even the options are parsed, so PL_tainting has
4191 * not been initialized properly. */
4192 bool
Perl_doing_taint(int argc,char * argv[],char * envp[])4193 Perl_doing_taint(int argc, char *argv[], char *envp[])
4194 {
4195 #ifndef PERL_IMPLICIT_SYS
4196 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4197 * before we have an interpreter-- and the whole point of this
4198 * function is to be called at such an early stage. If you are on
4199 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4200 * "tainted because running with altered effective ids', you'll
4201 * have to add your own checks somewhere in here. The two most
4202 * known samples of 'implicitness' are Win32 and NetWare, neither
4203 * of which has much of concept of 'uids'. */
4204 Uid_t uid = PerlProc_getuid();
4205 Uid_t euid = PerlProc_geteuid();
4206 Gid_t gid = PerlProc_getgid();
4207 Gid_t egid = PerlProc_getegid();
4208 (void)envp;
4209
4210 #ifdef VMS
4211 uid |= gid << 16;
4212 euid |= egid << 16;
4213 #endif
4214 if (uid && (euid != uid || egid != gid))
4215 return 1;
4216 #endif /* !PERL_IMPLICIT_SYS */
4217 /* This is a really primitive check; environment gets ignored only
4218 * if -T are the first chars together; otherwise one gets
4219 * "Too late" message. */
4220 if ( argc > 1 && argv[1][0] == '-'
4221 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4222 return 1;
4223 return 0;
4224 }
4225
4226 /* Passing the flag as a single char rather than a string is a slight space
4227 optimisation. The only message that isn't /^-.$/ is
4228 "program input from stdin", which is substituted in place of '\0', which
4229 could never be a command line flag. */
4230 STATIC void
S_forbid_setid(pTHX_ const char flag,const bool suidscript)4231 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4232 {
4233 char string[3] = "-x";
4234 const char *message = "program input from stdin";
4235
4236 PERL_UNUSED_CONTEXT;
4237 if (flag) {
4238 string[1] = flag;
4239 message = string;
4240 }
4241
4242 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4243 if (PerlProc_getuid() != PerlProc_geteuid())
4244 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4245 if (PerlProc_getgid() != PerlProc_getegid())
4246 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4247 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4248 if (suidscript)
4249 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4250 }
4251
4252 void
Perl_init_dbargs(pTHX)4253 Perl_init_dbargs(pTHX)
4254 {
4255 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4256 GV_ADDMULTI,
4257 SVt_PVAV))));
4258
4259 if (AvREAL(args)) {
4260 /* Someone has already created it.
4261 It might have entries, and if we just turn off AvREAL(), they will
4262 "leak" until global destruction. */
4263 av_clear(args);
4264 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4265 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4266 }
4267 AvREIFY_only(PL_dbargs);
4268 }
4269
4270 void
Perl_init_debugger(pTHX)4271 Perl_init_debugger(pTHX)
4272 {
4273 HV * const ostash = PL_curstash;
4274 MAGIC *mg;
4275
4276 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4277
4278 Perl_init_dbargs(aTHX);
4279 PL_DBgv = MUTABLE_GV(
4280 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4281 );
4282 PL_DBline = MUTABLE_GV(
4283 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4284 );
4285 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4286 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4287 ));
4288 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4289 if (!SvIOK(PL_DBsingle))
4290 sv_setiv(PL_DBsingle, 0);
4291 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4292 mg->mg_private = DBVARMG_SINGLE;
4293 SvSETMAGIC(PL_DBsingle);
4294
4295 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4296 if (!SvIOK(PL_DBtrace))
4297 sv_setiv(PL_DBtrace, 0);
4298 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4299 mg->mg_private = DBVARMG_TRACE;
4300 SvSETMAGIC(PL_DBtrace);
4301
4302 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4303 if (!SvIOK(PL_DBsignal))
4304 sv_setiv(PL_DBsignal, 0);
4305 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4306 mg->mg_private = DBVARMG_SIGNAL;
4307 SvSETMAGIC(PL_DBsignal);
4308
4309 SvREFCNT_dec(PL_curstash);
4310 PL_curstash = ostash;
4311 }
4312
4313 #ifndef STRESS_REALLOC
4314 #define REASONABLE(size) (size)
4315 #define REASONABLE_but_at_least(size,min) (size)
4316 #else
4317 #define REASONABLE(size) (1) /* unreasonable */
4318 #define REASONABLE_but_at_least(size,min) (min)
4319 #endif
4320
4321 void
Perl_init_stacks(pTHX)4322 Perl_init_stacks(pTHX)
4323 {
4324 SSize_t size;
4325
4326 /* start with 128-item stack and 8K cxstack */
4327 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4328 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4329 PL_curstackinfo->si_type = PERLSI_MAIN;
4330 #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
4331 PL_curstackinfo->si_stack_hwm = 0;
4332 #endif
4333 PL_curstack = PL_curstackinfo->si_stack;
4334 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4335
4336 PL_stack_base = AvARRAY(PL_curstack);
4337 PL_stack_sp = PL_stack_base;
4338 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4339
4340 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4341 PL_tmps_floor = -1;
4342 PL_tmps_ix = -1;
4343 PL_tmps_max = REASONABLE(128);
4344
4345 Newx(PL_markstack,REASONABLE(32),I32);
4346 PL_markstack_ptr = PL_markstack;
4347 PL_markstack_max = PL_markstack + REASONABLE(32);
4348
4349 SET_MARK_OFFSET;
4350
4351 Newx(PL_scopestack,REASONABLE(32),I32);
4352 #ifdef DEBUGGING
4353 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4354 #endif
4355 PL_scopestack_ix = 0;
4356 PL_scopestack_max = REASONABLE(32);
4357
4358 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4359 Newx(PL_savestack, size, ANY);
4360 PL_savestack_ix = 0;
4361 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4362 PL_savestack_max = size - SS_MAXPUSH;
4363 }
4364
4365 #undef REASONABLE
4366
4367 STATIC void
S_nuke_stacks(pTHX)4368 S_nuke_stacks(pTHX)
4369 {
4370 while (PL_curstackinfo->si_next)
4371 PL_curstackinfo = PL_curstackinfo->si_next;
4372 while (PL_curstackinfo) {
4373 PERL_SI *p = PL_curstackinfo->si_prev;
4374 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4375 Safefree(PL_curstackinfo->si_cxstack);
4376 Safefree(PL_curstackinfo);
4377 PL_curstackinfo = p;
4378 }
4379 Safefree(PL_tmps_stack);
4380 Safefree(PL_markstack);
4381 Safefree(PL_scopestack);
4382 #ifdef DEBUGGING
4383 Safefree(PL_scopestack_name);
4384 #endif
4385 Safefree(PL_savestack);
4386 }
4387
4388 void
Perl_populate_isa(pTHX_ const char * name,STRLEN len,...)4389 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4390 {
4391 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4392 AV *const isa = GvAVn(gv);
4393 va_list args;
4394
4395 PERL_ARGS_ASSERT_POPULATE_ISA;
4396
4397 if(AvFILLp(isa) != -1)
4398 return;
4399
4400 /* NOTE: No support for tied ISA */
4401
4402 va_start(args, len);
4403 do {
4404 const char *const parent = va_arg(args, const char*);
4405 size_t parent_len;
4406
4407 if (!parent)
4408 break;
4409 parent_len = va_arg(args, size_t);
4410
4411 /* Arguments are supplied with a trailing :: */
4412 assert(parent_len > 2);
4413 assert(parent[parent_len - 1] == ':');
4414 assert(parent[parent_len - 2] == ':');
4415 av_push(isa, newSVpvn(parent, parent_len - 2));
4416 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4417 } while (1);
4418 va_end(args);
4419 }
4420
4421
4422 STATIC void
S_init_predump_symbols(pTHX)4423 S_init_predump_symbols(pTHX)
4424 {
4425 GV *tmpgv;
4426 IO *io;
4427
4428 sv_setpvs(get_sv("\"", GV_ADD), " ");
4429 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4430
4431
4432 /* Historically, PVIOs were blessed into IO::Handle, unless
4433 FileHandle was loaded, in which case they were blessed into
4434 that. Action at a distance.
4435 However, if we simply bless into IO::Handle, we break code
4436 that assumes that PVIOs will have (among others) a seek
4437 method. IO::File inherits from IO::Handle and IO::Seekable,
4438 and provides the needed methods. But if we simply bless into
4439 it, then we break code that assumed that by loading
4440 IO::Handle, *it* would work.
4441 So a compromise is to set up the correct @IO::File::ISA,
4442 so that code that does C<use IO::Handle>; will still work.
4443 */
4444
4445 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4446 STR_WITH_LEN("IO::Handle::"),
4447 STR_WITH_LEN("IO::Seekable::"),
4448 STR_WITH_LEN("Exporter::"),
4449 NULL);
4450
4451 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4452 GvMULTI_on(PL_stdingv);
4453 io = GvIOp(PL_stdingv);
4454 IoTYPE(io) = IoTYPE_RDONLY;
4455 IoIFP(io) = PerlIO_stdin();
4456 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4457 GvMULTI_on(tmpgv);
4458 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4459
4460 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4461 GvMULTI_on(tmpgv);
4462 io = GvIOp(tmpgv);
4463 IoTYPE(io) = IoTYPE_WRONLY;
4464 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4465 setdefout(tmpgv);
4466 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4467 GvMULTI_on(tmpgv);
4468 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4469
4470 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4471 GvMULTI_on(PL_stderrgv);
4472 io = GvIOp(PL_stderrgv);
4473 IoTYPE(io) = IoTYPE_WRONLY;
4474 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4475 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4476 GvMULTI_on(tmpgv);
4477 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4478
4479 PL_statname = newSVpvs(""); /* last filename we did stat on */
4480 }
4481
4482 void
Perl_init_argv_symbols(pTHX_ int argc,char ** argv)4483 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4484 {
4485 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4486
4487 argc--,argv++; /* skip name of script */
4488 if (PL_doswitches) {
4489 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4490 char *s;
4491 if (!argv[0][1])
4492 break;
4493 if (argv[0][1] == '-' && !argv[0][2]) {
4494 argc--,argv++;
4495 break;
4496 }
4497 if ((s = strchr(argv[0], '='))) {
4498 const char *const start_name = argv[0] + 1;
4499 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4500 TRUE, SVt_PV)), s + 1);
4501 }
4502 else
4503 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4504 }
4505 }
4506 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4507 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4508 GvMULTI_on(PL_argvgv);
4509 av_clear(GvAVn(PL_argvgv));
4510 for (; argc > 0; argc--,argv++) {
4511 SV * const sv = newSVpv(argv[0],0);
4512 av_push(GvAV(PL_argvgv),sv);
4513 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4514 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4515 SvUTF8_on(sv);
4516 }
4517 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4518 (void)sv_utf8_decode(sv);
4519 }
4520 }
4521
4522 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4523 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4524 "-i used with no filenames on the command line, "
4525 "reading from STDIN");
4526 }
4527
4528 STATIC void
S_init_postdump_symbols(pTHX_ int argc,char ** argv,char ** env)4529 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4530 {
4531 GV* tmpgv;
4532
4533 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4534
4535 PL_toptarget = newSV_type(SVt_PVIV);
4536 SvPVCLEAR(PL_toptarget);
4537 PL_bodytarget = newSV_type(SVt_PVIV);
4538 SvPVCLEAR(PL_bodytarget);
4539 PL_formtarget = PL_bodytarget;
4540
4541 TAINT;
4542
4543 init_argv_symbols(argc,argv);
4544
4545 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4546 sv_setpv(GvSV(tmpgv),PL_origfilename);
4547 }
4548 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4549 HV *hv;
4550 bool env_is_not_environ;
4551 SvREFCNT_inc_simple_void_NN(PL_envgv);
4552 GvMULTI_on(PL_envgv);
4553 hv = GvHVn(PL_envgv);
4554 hv_magic(hv, NULL, PERL_MAGIC_env);
4555 #ifndef PERL_MICRO
4556 #ifdef USE_ENVIRON_ARRAY
4557 /* Note that if the supplied env parameter is actually a copy
4558 of the global environ then it may now point to free'd memory
4559 if the environment has been modified since. To avoid this
4560 problem we treat env==NULL as meaning 'use the default'
4561 */
4562 if (!env)
4563 env = environ;
4564 env_is_not_environ = env != environ;
4565 if (env_is_not_environ
4566 # ifdef USE_ITHREADS
4567 && PL_curinterp == aTHX
4568 # endif
4569 )
4570 {
4571 environ[0] = NULL;
4572 }
4573 if (env) {
4574 char *s, *old_var;
4575 STRLEN nlen;
4576 SV *sv;
4577 HV *dups = newHV();
4578
4579 for (; *env; env++) {
4580 old_var = *env;
4581
4582 if (!(s = strchr(old_var,'=')) || s == old_var)
4583 continue;
4584 nlen = s - old_var;
4585
4586 #if defined(MSDOS) && !defined(DJGPP)
4587 *s = '\0';
4588 (void)strupr(old_var);
4589 *s = '=';
4590 #endif
4591 if (hv_exists(hv, old_var, nlen)) {
4592 const char *name = savepvn(old_var, nlen);
4593
4594 /* make sure we use the same value as getenv(), otherwise code that
4595 uses getenv() (like setlocale()) might see a different value to %ENV
4596 */
4597 sv = newSVpv(PerlEnv_getenv(name), 0);
4598
4599 /* keep a count of the dups of this name so we can de-dup environ later */
4600 if (hv_exists(dups, name, nlen))
4601 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4602 else
4603 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4604
4605 Safefree(name);
4606 }
4607 else {
4608 sv = newSVpv(s+1, 0);
4609 }
4610 (void)hv_store(hv, old_var, nlen, sv, 0);
4611 if (env_is_not_environ)
4612 mg_set(sv);
4613 }
4614 if (HvKEYS(dups)) {
4615 /* environ has some duplicate definitions, remove them */
4616 HE *entry;
4617 hv_iterinit(dups);
4618 while ((entry = hv_iternext_flags(dups, 0))) {
4619 STRLEN nlen;
4620 const char *name = HePV(entry, nlen);
4621 IV count = SvIV(HeVAL(entry));
4622 IV i;
4623 SV **valp = hv_fetch(hv, name, nlen, 0);
4624
4625 assert(valp);
4626
4627 /* try to remove any duplicate names, depending on the
4628 * implementation used in my_setenv() the iteration might
4629 * not be necessary, but let's be safe.
4630 */
4631 for (i = 0; i < count; ++i)
4632 my_setenv(name, 0);
4633
4634 /* and set it back to the value we set $ENV{name} to */
4635 my_setenv(name, SvPV_nolen(*valp));
4636 }
4637 }
4638 SvREFCNT_dec_NN(dups);
4639 }
4640 #endif /* USE_ENVIRON_ARRAY */
4641 #endif /* !PERL_MICRO */
4642 }
4643 TAINT_NOT;
4644
4645 /* touch @F array to prevent spurious warnings 20020415 MJD */
4646 if (PL_minus_a) {
4647 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4648 }
4649 }
4650
4651 STATIC void
S_init_perllib(pTHX)4652 S_init_perllib(pTHX)
4653 {
4654 #ifndef VMS
4655 const char *perl5lib = NULL;
4656 #endif
4657 const char *s;
4658 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4659 STRLEN len;
4660 #endif
4661
4662 if (!TAINTING_get) {
4663 #ifndef VMS
4664 perl5lib = PerlEnv_getenv("PERL5LIB");
4665 /*
4666 * It isn't possible to delete an environment variable with
4667 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4668 * case we treat PERL5LIB as undefined if it has a zero-length value.
4669 */
4670 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4671 if (perl5lib && *perl5lib != '\0')
4672 #else
4673 if (perl5lib)
4674 #endif
4675 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4676 else {
4677 s = PerlEnv_getenv("PERLLIB");
4678 if (s)
4679 incpush_use_sep(s, 0, 0);
4680 }
4681 #else /* VMS */
4682 /* Treat PERL5?LIB as a possible search list logical name -- the
4683 * "natural" VMS idiom for a Unix path string. We allow each
4684 * element to be a set of |-separated directories for compatibility.
4685 */
4686 char buf[256];
4687 int idx = 0;
4688 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4689 do {
4690 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4691 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4692 else {
4693 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4694 incpush_use_sep(buf, 0, 0);
4695 }
4696 #endif /* VMS */
4697 }
4698
4699 #ifndef PERL_IS_MINIPERL
4700 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4701 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4702
4703 #include "perl_inc_macro.h"
4704 /* Use the ~-expanded versions of APPLLIB (undocumented),
4705 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4706 */
4707 INCPUSH_APPLLIB_EXP
4708 INCPUSH_SITEARCH_EXP
4709 INCPUSH_SITELIB_EXP
4710 INCPUSH_PERL_VENDORARCH_EXP
4711 INCPUSH_PERL_VENDORLIB_EXP
4712 INCPUSH_ARCHLIB_EXP
4713 INCPUSH_PRIVLIB_EXP
4714 INCPUSH_PERL_OTHERLIBDIRS
4715 INCPUSH_PERL5LIB
4716 INCPUSH_APPLLIB_OLD_EXP
4717 INCPUSH_SITELIB_STEM
4718 INCPUSH_PERL_VENDORLIB_STEM
4719 INCPUSH_PERL_OTHERLIBDIRS_ARCHONLY
4720
4721 #endif /* !PERL_IS_MINIPERL */
4722
4723 if (!TAINTING_get) {
4724 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4725 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4726 if (unsafe && strEQ(unsafe, "1"))
4727 #endif
4728 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4729 }
4730 }
4731
4732 #if defined(DOSISH)
4733 # define PERLLIB_SEP ';'
4734 #elif defined(__VMS)
4735 # define PERLLIB_SEP PL_perllib_sep
4736 #else
4737 # define PERLLIB_SEP ':'
4738 #endif
4739 #ifndef PERLLIB_MANGLE
4740 # define PERLLIB_MANGLE(s,n) (s)
4741 #endif
4742
4743 #ifndef PERL_IS_MINIPERL
4744 /* Push a directory onto @INC if it exists.
4745 Generate a new SV if we do this, to save needing to copy the SV we push
4746 onto @INC */
4747 STATIC SV *
S_incpush_if_exists(pTHX_ AV * const av,SV * dir,SV * const stem)4748 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4749 {
4750 Stat_t tmpstatbuf;
4751
4752 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4753
4754 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4755 S_ISDIR(tmpstatbuf.st_mode)) {
4756 av_push(av, dir);
4757 dir = newSVsv(stem);
4758 } else {
4759 /* Truncate dir back to stem. */
4760 SvCUR_set(dir, SvCUR(stem));
4761 }
4762 return dir;
4763 }
4764 #endif
4765
4766 STATIC SV *
S_mayberelocate(pTHX_ const char * const dir,STRLEN len,U32 flags)4767 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4768 {
4769 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4770 SV *libdir;
4771
4772 PERL_ARGS_ASSERT_MAYBERELOCATE;
4773 assert(len > 0);
4774
4775 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4776 defined to so something (in os2/os2.c), but the code has been
4777 this way, ignoring any possible changed of length, since
4778 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4779 it be. */
4780 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4781
4782 #ifdef VMS
4783 {
4784 char *unix;
4785
4786 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4787 len = strlen(unix);
4788 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4789 sv_usepvn(libdir,unix,len);
4790 }
4791 else
4792 PerlIO_printf(Perl_error_log,
4793 "Failed to unixify @INC element \"%s\"\n",
4794 SvPV_nolen_const(libdir));
4795 }
4796 #endif
4797
4798 /* Do the if() outside the #ifdef to avoid warnings about an unused
4799 parameter. */
4800 if (canrelocate) {
4801 #ifdef PERL_RELOCATABLE_INC
4802 /*
4803 * Relocatable include entries are marked with a leading .../
4804 *
4805 * The algorithm is
4806 * 0: Remove that leading ".../"
4807 * 1: Remove trailing executable name (anything after the last '/')
4808 * from the perl path to give a perl prefix
4809 * Then
4810 * While the @INC element starts "../" and the prefix ends with a real
4811 * directory (ie not . or ..) chop that real directory off the prefix
4812 * and the leading "../" from the @INC element. ie a logical "../"
4813 * cleanup
4814 * Finally concatenate the prefix and the remainder of the @INC element
4815 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4816 * generates /usr/local/lib/perl5
4817 */
4818 const char *libpath = SvPVX(libdir);
4819 STRLEN libpath_len = SvCUR(libdir);
4820 if (memBEGINs(libpath, libpath_len, ".../")) {
4821 /* Game on! */
4822 SV * const caret_X = get_sv("\030", 0);
4823 /* Going to use the SV just as a scratch buffer holding a C
4824 string: */
4825 SV *prefix_sv;
4826 char *prefix;
4827 char *lastslash;
4828
4829 /* $^X is *the* source of taint if tainting is on, hence
4830 SvPOK() won't be true. */
4831 assert(caret_X);
4832 assert(SvPOKp(caret_X));
4833 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4834 SvUTF8(caret_X));
4835 /* Firstly take off the leading .../
4836 If all else fail we'll do the paths relative to the current
4837 directory. */
4838 sv_chop(libdir, libpath + 4);
4839 /* Don't use SvPV as we're intentionally bypassing taining,
4840 mortal copies that the mg_get of tainting creates, and
4841 corruption that seems to come via the save stack.
4842 I guess that the save stack isn't correctly set up yet. */
4843 libpath = SvPVX(libdir);
4844 libpath_len = SvCUR(libdir);
4845
4846 prefix = SvPVX(prefix_sv);
4847 lastslash = (char *) my_memrchr(prefix, '/',
4848 SvEND(prefix_sv) - prefix);
4849
4850 /* First time in with the *lastslash = '\0' we just wipe off
4851 the trailing /perl from (say) /usr/foo/bin/perl
4852 */
4853 if (lastslash) {
4854 SV *tempsv;
4855 while ((*lastslash = '\0'), /* Do that, come what may. */
4856 ( memBEGINs(libpath, libpath_len, "../")
4857 && (lastslash =
4858 (char *) my_memrchr(prefix, '/',
4859 SvEND(prefix_sv) - prefix))))
4860 {
4861 if (lastslash[1] == '\0'
4862 || (lastslash[1] == '.'
4863 && (lastslash[2] == '/' /* ends "/." */
4864 || (lastslash[2] == '/'
4865 && lastslash[3] == '/' /* or "/.." */
4866 )))) {
4867 /* Prefix ends "/" or "/." or "/..", any of which
4868 are fishy, so don't do any more logical cleanup.
4869 */
4870 break;
4871 }
4872 /* Remove leading "../" from path */
4873 libpath += 3;
4874 libpath_len -= 3;
4875 /* Next iteration round the loop removes the last
4876 directory name from prefix by writing a '\0' in
4877 the while clause. */
4878 }
4879 /* prefix has been terminated with a '\0' to the correct
4880 length. libpath points somewhere into the libdir SV.
4881 We need to join the 2 with '/' and drop the result into
4882 libdir. */
4883 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4884 SvREFCNT_dec(libdir);
4885 /* And this is the new libdir. */
4886 libdir = tempsv;
4887 if (TAINTING_get &&
4888 (PerlProc_getuid() != PerlProc_geteuid() ||
4889 PerlProc_getgid() != PerlProc_getegid())) {
4890 /* Need to taint relocated paths if running set ID */
4891 SvTAINTED_on(libdir);
4892 }
4893 }
4894 SvREFCNT_dec(prefix_sv);
4895 }
4896 #endif
4897 }
4898 return libdir;
4899 }
4900
4901 STATIC void
S_incpush(pTHX_ const char * const dir,STRLEN len,U32 flags)4902 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4903 {
4904 #ifndef PERL_IS_MINIPERL
4905 const U8 using_sub_dirs
4906 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4907 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4908 const U8 add_versioned_sub_dirs
4909 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4910 const U8 add_archonly_sub_dirs
4911 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4912 #ifdef PERL_INC_VERSION_LIST
4913 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4914 #endif
4915 #endif
4916 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4917 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4918 AV *const inc = GvAVn(PL_incgv);
4919
4920 PERL_ARGS_ASSERT_INCPUSH;
4921 assert(len > 0);
4922
4923 /* Could remove this vestigial extra block, if we don't mind a lot of
4924 re-indenting diff noise. */
4925 {
4926 SV *const libdir = mayberelocate(dir, len, flags);
4927 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4928 arranged to unshift #! line -I onto the front of @INC. However,
4929 -I can add version and architecture specific libraries, and they
4930 need to go first. The old code assumed that it was always
4931 pushing. Hence to make it work, need to push the architecture
4932 (etc) libraries onto a temporary array, then "unshift" that onto
4933 the front of @INC. */
4934 #ifndef PERL_IS_MINIPERL
4935 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4936
4937 /*
4938 * BEFORE pushing libdir onto @INC we may first push version- and
4939 * archname-specific sub-directories.
4940 */
4941 if (using_sub_dirs) {
4942 SV *subdir = newSVsv(libdir);
4943 #ifdef PERL_INC_VERSION_LIST
4944 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4945 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4946 const char * const *incver;
4947 #endif
4948
4949 if (add_versioned_sub_dirs) {
4950 /* .../version/archname if -d .../version/archname */
4951 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4952 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4953
4954 /* .../version if -d .../version */
4955 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4956 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4957 }
4958
4959 #ifdef PERL_INC_VERSION_LIST
4960 if (addoldvers) {
4961 for (incver = incverlist; *incver; incver++) {
4962 /* .../xxx if -d .../xxx */
4963 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4964 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4965 }
4966 }
4967 #endif
4968
4969 if (add_archonly_sub_dirs) {
4970 /* .../archname if -d .../archname */
4971 sv_catpvs(subdir, "/" ARCHNAME);
4972 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4973
4974 }
4975
4976 assert (SvREFCNT(subdir) == 1);
4977 SvREFCNT_dec(subdir);
4978 }
4979 #endif /* !PERL_IS_MINIPERL */
4980 /* finally add this lib directory at the end of @INC */
4981 if (unshift) {
4982 #ifdef PERL_IS_MINIPERL
4983 const Size_t extra = 0;
4984 #else
4985 Size_t extra = av_count(av);
4986 #endif
4987 av_unshift(inc, extra + push_basedir);
4988 if (push_basedir)
4989 av_store(inc, extra, libdir);
4990 #ifndef PERL_IS_MINIPERL
4991 while (extra--) {
4992 /* av owns a reference, av_store() expects to be donated a
4993 reference, and av expects to be sane when it's cleared.
4994 If I wanted to be naughty and wrong, I could peek inside the
4995 implementation of av_clear(), realise that it uses
4996 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4997 and so directly steal from it (with a memcpy() to inc, and
4998 then memset() to NULL them out. But people copy code from the
4999 core expecting it to be best practise, so let's use the API.
5000 Although studious readers will note that I'm not checking any
5001 return codes. */
5002 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
5003 }
5004 SvREFCNT_dec(av);
5005 #endif
5006 }
5007 else if (push_basedir) {
5008 av_push(inc, libdir);
5009 }
5010
5011 if (!push_basedir) {
5012 assert (SvREFCNT(libdir) == 1);
5013 SvREFCNT_dec(libdir);
5014 }
5015 }
5016 }
5017
5018 STATIC void
S_incpush_use_sep(pTHX_ const char * p,STRLEN len,U32 flags)5019 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
5020 {
5021 const char *s;
5022 const char *end;
5023 /* This logic has been broken out from S_incpush(). It may be possible to
5024 simplify it. */
5025
5026 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
5027
5028 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
5029 * argument to incpush_use_sep. This allows creation of relocatable
5030 * Perl distributions that patch the binary at install time. Those
5031 * distributions will have to provide their own relocation tools; this
5032 * is not a feature otherwise supported by core Perl.
5033 */
5034 #ifndef PERL_RELOCATABLE_INCPUSH
5035 if (!len)
5036 #endif
5037 len = strlen(p);
5038
5039 end = p + len;
5040
5041 /* Break at all separators */
5042 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
5043 if (s == p) {
5044 /* skip any consecutive separators */
5045
5046 /* Uncomment the next line for PATH semantics */
5047 /* But you'll need to write tests */
5048 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
5049 } else {
5050 incpush(p, (STRLEN)(s - p), flags);
5051 }
5052 p = s + 1;
5053 }
5054 if (p != end)
5055 incpush(p, (STRLEN)(end - p), flags);
5056
5057 }
5058
5059 void
Perl_call_list(pTHX_ I32 oldscope,AV * paramList)5060 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5061 {
5062 SV *atsv;
5063 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5064 CV *cv;
5065 STRLEN len;
5066 int ret;
5067 dJMPENV;
5068
5069 PERL_ARGS_ASSERT_CALL_LIST;
5070
5071 while (av_count(paramList) > 0) {
5072 cv = MUTABLE_CV(av_shift(paramList));
5073 if (PL_savebegin) {
5074 if (paramList == PL_beginav) {
5075 /* save PL_beginav for compiler */
5076 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5077 }
5078 else if (paramList == PL_checkav) {
5079 /* save PL_checkav for compiler */
5080 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5081 }
5082 else if (paramList == PL_unitcheckav) {
5083 /* save PL_unitcheckav for compiler */
5084 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5085 }
5086 } else {
5087 SAVEFREESV(cv);
5088 }
5089 JMPENV_PUSH(ret);
5090 switch (ret) {
5091 case 0:
5092 CALL_LIST_BODY(cv);
5093 atsv = ERRSV;
5094 (void)SvPV_const(atsv, len);
5095 if (len) {
5096 PL_curcop = &PL_compiling;
5097 CopLINE_set(PL_curcop, oldline);
5098 if (paramList == PL_beginav)
5099 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5100 else
5101 Perl_sv_catpvf(aTHX_ atsv,
5102 "%s failed--call queue aborted",
5103 paramList == PL_checkav ? "CHECK"
5104 : paramList == PL_initav ? "INIT"
5105 : paramList == PL_unitcheckav ? "UNITCHECK"
5106 : "END");
5107 while (PL_scopestack_ix > oldscope)
5108 LEAVE;
5109 JMPENV_POP;
5110 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5111 }
5112 break;
5113 case 1:
5114 STATUS_ALL_FAILURE;
5115 /* FALLTHROUGH */
5116 case 2:
5117 /* my_exit() was called */
5118 while (PL_scopestack_ix > oldscope)
5119 LEAVE;
5120 FREETMPS;
5121 SET_CURSTASH(PL_defstash);
5122 PL_curcop = &PL_compiling;
5123 CopLINE_set(PL_curcop, oldline);
5124 JMPENV_POP;
5125 my_exit_jump();
5126 NOT_REACHED; /* NOTREACHED */
5127 case 3:
5128 if (PL_restartop) {
5129 PL_curcop = &PL_compiling;
5130 CopLINE_set(PL_curcop, oldline);
5131 JMPENV_JUMP(3);
5132 }
5133 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5134 FREETMPS;
5135 break;
5136 }
5137 JMPENV_POP;
5138 }
5139 }
5140
5141 /*
5142 =for apidoc my_exit
5143
5144 A wrapper for the C library L<exit(3)>, honoring what L<perlapi/PL_exit_flags>
5145 say to do.
5146
5147 =cut
5148 */
5149
5150 void
Perl_my_exit(pTHX_ U32 status)5151 Perl_my_exit(pTHX_ U32 status)
5152 {
5153 if (PL_exit_flags & PERL_EXIT_ABORT) {
5154 abort();
5155 }
5156 if (PL_exit_flags & PERL_EXIT_WARN) {
5157 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5158 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5159 PL_exit_flags &= ~PERL_EXIT_ABORT;
5160 }
5161 switch (status) {
5162 case 0:
5163 STATUS_ALL_SUCCESS;
5164 break;
5165 case 1:
5166 STATUS_ALL_FAILURE;
5167 break;
5168 default:
5169 STATUS_EXIT_SET(status);
5170 break;
5171 }
5172 my_exit_jump();
5173 }
5174
5175 void
Perl_my_failure_exit(pTHX)5176 Perl_my_failure_exit(pTHX)
5177 {
5178 #ifdef VMS
5179 /* We have been called to fall on our sword. The desired exit code
5180 * should be already set in STATUS_UNIX, but could be shifted over
5181 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5182 * that code is set.
5183 *
5184 * If an error code has not been set, then force the issue.
5185 */
5186 if (MY_POSIX_EXIT) {
5187
5188 /* According to the die_exit.t tests, if errno is non-zero */
5189 /* It should be used for the error status. */
5190
5191 if (errno == EVMSERR) {
5192 STATUS_NATIVE = vaxc$errno;
5193 } else {
5194
5195 /* According to die_exit.t tests, if the child_exit code is */
5196 /* also zero, then we need to exit with a code of 255 */
5197 if ((errno != 0) && (errno < 256))
5198 STATUS_UNIX_EXIT_SET(errno);
5199 else if (STATUS_UNIX < 255) {
5200 STATUS_UNIX_EXIT_SET(255);
5201 }
5202
5203 }
5204
5205 /* The exit code could have been set by $? or vmsish which
5206 * means that it may not have fatal set. So convert
5207 * success/warning codes to fatal with out changing
5208 * the POSIX status code. The severity makes VMS native
5209 * status handling work, while UNIX mode programs use the
5210 * POSIX exit codes.
5211 */
5212 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5213 STATUS_NATIVE &= STS$M_COND_ID;
5214 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5215 }
5216 }
5217 else {
5218 /* Traditionally Perl on VMS always expects a Fatal Error. */
5219 if (vaxc$errno & 1) {
5220
5221 /* So force success status to failure */
5222 if (STATUS_NATIVE & 1)
5223 STATUS_ALL_FAILURE;
5224 }
5225 else {
5226 if (!vaxc$errno) {
5227 STATUS_UNIX = EINTR; /* In case something cares */
5228 STATUS_ALL_FAILURE;
5229 }
5230 else {
5231 int severity;
5232 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5233
5234 /* Encode the severity code */
5235 severity = STATUS_NATIVE & STS$M_SEVERITY;
5236 STATUS_UNIX = (severity ? severity : 1) << 8;
5237
5238 /* Perl expects this to be a fatal error */
5239 if (severity != STS$K_SEVERE)
5240 STATUS_ALL_FAILURE;
5241 }
5242 }
5243 }
5244
5245 #else
5246 int exitstatus;
5247 int eno = errno;
5248 if (eno & 255)
5249 STATUS_UNIX_SET(eno);
5250 else {
5251 exitstatus = STATUS_UNIX >> 8;
5252 if (exitstatus & 255)
5253 STATUS_UNIX_SET(exitstatus);
5254 else
5255 STATUS_UNIX_SET(255);
5256 }
5257 #endif
5258 if (PL_exit_flags & PERL_EXIT_ABORT) {
5259 abort();
5260 }
5261 if (PL_exit_flags & PERL_EXIT_WARN) {
5262 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5263 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5264 PL_exit_flags &= ~PERL_EXIT_ABORT;
5265 }
5266 my_exit_jump();
5267 }
5268
5269 STATIC void
S_my_exit_jump(pTHX)5270 S_my_exit_jump(pTHX)
5271 {
5272 if (PL_e_script) {
5273 SvREFCNT_dec(PL_e_script);
5274 PL_e_script = NULL;
5275 }
5276
5277 POPSTACK_TO(PL_mainstack);
5278 if (cxstack_ix >= 0) {
5279 dounwind(-1);
5280 cx_popblock(cxstack);
5281 }
5282 LEAVE_SCOPE(0);
5283
5284 JMPENV_JUMP(2);
5285 }
5286
5287 static I32
read_e_script(pTHX_ int idx,SV * buf_sv,int maxlen)5288 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5289 {
5290 const char * const p = SvPVX_const(PL_e_script);
5291 const char * const e = SvEND(PL_e_script);
5292 const char *nl = (char *) memchr(p, '\n', e - p);
5293
5294 PERL_UNUSED_ARG(idx);
5295 PERL_UNUSED_ARG(maxlen);
5296
5297 nl = (nl) ? nl+1 : e;
5298 if (nl-p == 0) {
5299 filter_del(read_e_script);
5300 return 0;
5301 }
5302 sv_catpvn(buf_sv, p, nl-p);
5303 sv_chop(PL_e_script, nl);
5304 return 1;
5305 }
5306
5307 /* removes boilerplate code at the end of each boot_Module xsub */
5308 void
Perl_xs_boot_epilog(pTHX_ const I32 ax)5309 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5310 {
5311 if (PL_unitcheckav)
5312 call_list(PL_scopestack_ix, PL_unitcheckav);
5313 XSRETURN_YES;
5314 }
5315
5316 /*
5317 * ex: set ts=8 sts=4 sw=4 et:
5318 */
5319