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 by Larry Wall and others
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
26 * Note that at build time this file is also linked to as perlmini.c,
27 * and perlmini.o is then built with PERL_IS_MINIPERL defined, which is
28 * then used to create the miniperl executable, rather than perl.o.
31 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
32 # define USE_SITECUSTOMIZE
36 #define PERL_IN_PERL_C
38 #include "patchlevel.h" /* for local_patches */
45 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
52 char control[CMSG_SPACE(sizeof(int))];
65 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
67 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
68 # define validate_suid(rsfp) NOOP
70 # define validate_suid(rsfp) S_validate_suid(aTHX_ rsfp)
73 #define CALL_BODY_SUB(myop) \
74 if (PL_op == (myop)) \
75 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
79 #define CALL_LIST_BODY(cv) \
80 PUSHMARK(PL_stack_sp); \
81 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
84 S_init_tls_and_interp(PerlInterpreter *my_perl)
88 PERL_SET_INTERP(my_perl);
89 #if defined(USE_ITHREADS)
92 PERL_SET_THX(my_perl);
95 KEYWORD_PLUGIN_MUTEX_INIT;
99 MUTEX_INIT(&PL_dollarzero_mutex);
100 MUTEX_INIT(&PL_my_ctx_mutex);
103 #if defined(USE_ITHREADS)
106 /* This always happens for non-ithreads */
109 PERL_SET_THX(my_perl);
114 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
117 Perl_sys_init(int* argc, char*** argv)
121 PERL_ARGS_ASSERT_SYS_INIT;
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);
129 Perl_sys_init3(int* argc, char*** argv, char*** env)
133 PERL_ARGS_ASSERT_SYS_INIT3;
135 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
136 PERL_UNUSED_ARG(argv);
137 PERL_UNUSED_ARG(env);
138 PERL_SYS_INIT3_BODY(argc, argv, env);
145 if (!PL_veto_cleanup) {
146 PERL_SYS_TERM_BODY();
151 #ifdef PERL_IMPLICIT_SYS
153 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
154 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
155 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
156 struct IPerlDir* ipD, struct IPerlSock* ipS,
157 struct IPerlProc* ipP)
159 PerlInterpreter *my_perl;
161 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
163 /* Newx() needs interpreter, so call malloc() instead */
164 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
165 S_init_tls_and_interp(my_perl);
166 Zero(my_perl, 1, PerlInterpreter);
176 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
183 =head1 Embedding Functions
185 =for apidoc perl_alloc
187 Allocates a new Perl interpreter. See L<perlembed>.
195 PerlInterpreter *my_perl;
197 /* Newx() needs interpreter, so call malloc() instead */
198 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
200 S_init_tls_and_interp(my_perl);
201 #ifndef PERL_TRACK_MEMPOOL
202 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
204 Zero(my_perl, 1, PerlInterpreter);
205 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
209 #endif /* PERL_IMPLICIT_SYS */
212 =for apidoc perl_construct
214 Initializes a new Perl interpreter. See L<perlembed>.
220 S_fixup_platform_bugs(void)
222 #if defined(__GLIBC__) && IVSIZE == 8 \
223 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
227 /* Cannot do this check with inlined IV constants since
228 * that seems to work correctly even with the buggy glibc. */
231 /* Yikes, we have the bug.
232 * Patch in the workaround version. */
233 PL_ppaddr[OP_I_MODULO] = &Perl_pp_i_modulo_glibc_bugfix;
240 perl_construct(pTHXx)
244 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
248 PL_perl_destruct_level = 1;
250 PERL_UNUSED_ARG(my_perl);
251 if (PL_perl_destruct_level > 0)
254 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
256 #ifdef PERL_TRACE_OPS
257 Zero(PL_op_exec_cnt, OP_max+2, UV);
262 SvREADONLY_on(&PL_sv_placeholder);
263 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
265 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
266 #ifdef PERL_USES_PL_PIDSTATUS
267 PL_pidstatus = newHV();
270 PL_rs = newSVpvs("\n");
274 /* The PERL_INTERNAL_RAND_SEED set-up must be after init_stacks because it calls
275 * things that may put SVs on the stack.
278 #ifdef NO_PERL_INTERNAL_RAND_SEED
279 Perl_drand48_init_r(&PL_internal_random_state, seed());
284 if (PerlProc_getuid() != PerlProc_geteuid() ||
285 PerlProc_getgid() != PerlProc_getegid() ||
286 !(env_pv = PerlEnv_getenv("PERL_INTERNAL_RAND_SEED")) ||
287 grok_number(env_pv, strlen(env_pv), &seed) != IS_NUMBER_IN_UV) {
290 Perl_drand48_init_r(&PL_internal_random_state, (U32)seed);
296 S_fixup_platform_bugs();
303 #if defined(LOCAL_PATCH_COUNT)
304 PL_localpatches = local_patches; /* For possible -v */
307 #if defined(LIBM_LIB_VERSION)
309 * Some BSDs and Cygwin default to POSIX math instead of IEEE.
310 * This switches them over to IEEE.
312 _LIB_VERSION = _IEEE_;
315 #ifdef HAVE_INTERP_INTERN
319 PerlIO_init(aTHX); /* Hook to IO system */
321 PL_fdpid = newAV(); /* for remembering popen pids by fd */
322 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
323 PL_errors = newSVpvs("");
324 SvPVCLEAR(PERL_DEBUG_PAD(0)); /* For regex debugging. */
325 SvPVCLEAR(PERL_DEBUG_PAD(1)); /* ext/re needs these */
326 SvPVCLEAR(PERL_DEBUG_PAD(2)); /* even without DEBUGGING. */
328 /* First entry is a list of empty elements. It needs to be initialised
329 else all hell breaks loose in S_find_uninit_var(). */
330 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
331 PL_regex_pad = AvARRAY(PL_regex_padav);
332 Newxz(PL_stashpad, PL_stashpadmax, HV *);
334 #ifdef USE_REENTRANT_API
335 Perl_reentrant_init(aTHX);
337 if (PL_hash_seed_set == FALSE) {
338 /* Initialize the hash seed and state at startup. This must be
339 * done very early, before ANY hashes are constructed, and once
340 * setup is fixed for the lifetime of the process.
342 * If you decide to disable the seeding process you should choose
343 * a suitable seed yourself and define PERL_HASH_SEED to a well chosen
344 * string. See hv_func.h for details.
346 #if defined(USE_HASH_SEED)
347 /* get the hash seed from the environment or from an RNG */
348 Perl_get_hash_seed(aTHX_ PL_hash_seed);
350 /* they want a hard coded seed, check that it is long enough */
351 assert( strlen(PERL_HASH_SEED) >= PERL_HASH_SEED_BYTES );
354 /* now we use the chosen seed to initialize the state -
355 * in some configurations this may be a relatively speaking
356 * expensive operation, but we only have to do it once at startup */
357 PERL_HASH_SEED_STATE(PERL_HASH_SEED,PL_hash_state);
359 #ifdef PERL_USE_SINGLE_CHAR_HASH_CACHE
360 /* we can build a special cache for 0/1 byte keys, if people choose
361 * I suspect most of the time it is not worth it */
365 for (i=0;i<256;i++) {
367 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[i],str,1);
369 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[256],str,0);
372 /* at this point we have initialezed the hash function, and we can start
373 * constructing hashes */
374 PL_hash_seed_set= TRUE;
377 /* Allow PL_strtab to be pre-initialized before calling perl_construct.
378 * can use a custom optimized PL_strtab hash before calling perl_construct */
380 /* Note that strtab is a rather special HV. Assumptions are made
381 about not iterating on it, and not adding tie magic to it.
382 It is properly deallocated in perl_destruct() */
385 /* SHAREKEYS tells us that the hash has its keys shared with PL_strtab,
386 * which is not the case with PL_strtab itself */
387 HvSHAREKEYS_off(PL_strtab); /* mandatory */
388 hv_ksplit(PL_strtab, 1 << 11);
391 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
394 # ifdef USE_ENVIRON_ARRAY
395 PL_origenviron = environ;
399 /* Use sysconf(_SC_CLK_TCK) if available, if not
400 * available or if the sysconf() fails, use the HZ.
401 * The HZ if not originally defined has been by now
402 * been defined as CLK_TCK, if available. */
403 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
404 PL_clocktick = sysconf(_SC_CLK_TCK);
405 if (PL_clocktick <= 0)
409 PL_stashcache = newHV();
411 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
414 if (!PL_mmap_page_size) {
415 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
417 SETERRNO(0, SS_NORMAL);
419 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
421 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
423 if ((long) PL_mmap_page_size < 0) {
424 Perl_croak(aTHX_ "panic: sysconf: %s",
425 errno ? Strerror(errno) : "pagesize unknown");
428 #elif defined(HAS_GETPAGESIZE)
429 PL_mmap_page_size = getpagesize();
430 #elif defined(I_SYS_PARAM) && defined(PAGESIZE)
431 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
433 if (PL_mmap_page_size <= 0)
434 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
435 (IV) PL_mmap_page_size);
437 #endif /* HAS_MMAP */
439 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
440 PL_timesbase.tms_utime = 0;
441 PL_timesbase.tms_stime = 0;
442 PL_timesbase.tms_cutime = 0;
443 PL_timesbase.tms_cstime = 0;
446 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
448 PL_registered_mros = newHV();
449 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
450 HvMAX(PL_registered_mros) = 0;
452 #ifdef USE_POSIX_2008_LOCALE
453 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
461 =for apidoc nothreadhook
463 Stub that provides thread hook for perl_destruct when there are
470 Perl_nothreadhook(pTHX)
476 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
478 Perl_dump_sv_child(pTHX_ SV *sv)
481 const int sock = PL_dumper_fd;
482 const int debug_fd = PerlIO_fileno(Perl_debug_log);
483 union control_un control;
486 struct cmsghdr *cmptr;
488 unsigned char buffer[256];
490 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
492 if(sock == -1 || debug_fd == -1)
495 PerlIO_flush(Perl_debug_log);
497 /* All these shenanigans are to pass a file descriptor over to our child for
498 it to dump out to. We can't let it hold open the file descriptor when it
499 forks, as the file descriptor it will dump to can turn out to be one end
500 of pipe that some other process will wait on for EOF. (So as it would
501 be open, the wait would be forever.) */
503 msg.msg_control = control.control;
504 msg.msg_controllen = sizeof(control.control);
505 /* We're a connected socket so we don't need a destination */
511 cmptr = CMSG_FIRSTHDR(&msg);
512 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
513 cmptr->cmsg_level = SOL_SOCKET;
514 cmptr->cmsg_type = SCM_RIGHTS;
515 *((int *)CMSG_DATA(cmptr)) = 1;
517 vec[0].iov_base = (void*)&sv;
518 vec[0].iov_len = sizeof(sv);
519 got = sendmsg(sock, &msg, 0);
522 perror("Debug leaking scalars parent sendmsg failed");
525 if(got < sizeof(sv)) {
526 perror("Debug leaking scalars parent short sendmsg");
530 /* Return protocol is
532 unsigned char: length of location string (0 for empty)
533 unsigned char*: string (not terminated)
535 vec[0].iov_base = (void*)&returned_errno;
536 vec[0].iov_len = sizeof(returned_errno);
537 vec[1].iov_base = buffer;
540 got = readv(sock, vec, 2);
543 perror("Debug leaking scalars parent read failed");
544 PerlIO_flush(PerlIO_stderr());
547 if(got < sizeof(returned_errno) + 1) {
548 perror("Debug leaking scalars parent short read");
549 PerlIO_flush(PerlIO_stderr());
554 got = read(sock, buffer + 1, *buffer);
556 perror("Debug leaking scalars parent read 2 failed");
557 PerlIO_flush(PerlIO_stderr());
562 perror("Debug leaking scalars parent short read 2");
563 PerlIO_flush(PerlIO_stderr());
568 if (returned_errno || *buffer) {
569 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
570 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
571 returned_errno, Strerror(returned_errno));
577 =for apidoc perl_destruct
579 Shuts down a Perl interpreter. See L<perlembed> for a tutorial.
581 C<my_perl> points to the Perl interpreter. It must have been previously
582 created through the use of L</perl_alloc> and L</perl_construct>. It may
583 have been initialised through L</perl_parse>, and may have been used
584 through L</perl_run> and other means. This function should be called for
585 any Perl interpreter that has been constructed with L</perl_construct>,
586 even if subsequent operations on it failed, for example if L</perl_parse>
587 returned a non-zero value.
589 If the interpreter's C<PL_exit_flags> word has the
590 C<PERL_EXIT_DESTRUCT_END> flag set, then this function will execute code
591 in C<END> blocks before performing the rest of destruction. If it is
592 desired to make any use of the interpreter between L</perl_parse> and
593 L</perl_destruct> other than just calling L</perl_run>, then this flag
594 should be set early on. This matters if L</perl_run> will not be called,
595 or if anything else will be done in addition to calling L</perl_run>.
597 Returns a value be a suitable value to pass to the C library function
598 C<exit> (or to return from C<main>), to serve as an exit code indicating
599 the nature of the way the interpreter terminated. This takes into account
600 any failure of L</perl_parse> and any early exit from L</perl_run>.
601 The exit code is of the type required by the host operating system,
602 so because of differing exit code conventions it is not portable to
603 interpret specific numeric values as having specific meanings.
612 volatile signed char destruct_level; /* see possible values in intrpvar.h */
614 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
619 PERL_ARGS_ASSERT_PERL_DESTRUCT;
621 PERL_UNUSED_ARG(my_perl);
624 assert(PL_scopestack_ix == 1);
626 /* wait for all pseudo-forked children to finish */
627 PERL_WAIT_FOR_CHILDREN;
629 destruct_level = PL_perl_destruct_level;
631 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
634 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
638 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
643 if (destruct_level < i) destruct_level = i;
644 #ifdef PERL_TRACK_MEMPOOL
645 /* RT #114496, for perl_free */
646 PL_perl_destruct_level = i;
651 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
657 if (PL_endav && !PL_minus_c) {
658 PERL_SET_PHASE(PERL_PHASE_END);
659 call_list(PL_scopestack_ix, PL_endav);
665 assert(PL_scopestack_ix == 0);
667 /* normally when we get here, PL_parser should be null due to having
668 * its original (null) value restored by SAVEt_PARSER during leaving
669 * scope (usually before run-time starts in fact).
670 * But if a thread is created within a BEGIN block, the parser is
671 * duped, but the SAVEt_PARSER savestack entry isn't. So PL_parser
672 * never gets cleaned up.
673 * Clean it up here instead. This is a bit of a hack.
676 /* stop parser_free() stomping on PL_curcop */
677 PL_parser->saved_curcop = PL_curcop;
678 parser_free(PL_parser);
682 /* Need to flush since END blocks can produce output */
683 /* flush stdout separately, since we can identify it */
686 PerlIO *stdo = PerlIO_stdout();
687 if (*stdo && PerlIO_flush(stdo)) {
688 PerlIO_restore_errno(stdo);
690 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s\n",
699 #ifdef PERL_TRACE_OPS
700 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
702 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
705 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
709 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
710 for (i = 0; i <= OP_max; ++i) {
711 if (PL_op_exec_cnt[i])
712 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
714 /* Utility slot for easily doing little tracing experiments in the runloop: */
715 if (PL_op_exec_cnt[OP_max+1] != 0)
716 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
717 PerlIO_printf(Perl_debug_log, "\n");
722 if (PL_threadhook(aTHX)) {
723 /* Threads hook has vetoed further cleanup */
724 PL_veto_cleanup = TRUE;
728 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
729 if (destruct_level != 0) {
730 /* Fork here to create a child. Our child's job is to preserve the
731 state of scalars prior to destruction, so that we can instruct it
732 to dump any scalars that we later find have leaked.
733 There's no subtlety in this code - it assumes POSIX, and it doesn't
737 if(PerlSock_socketpair_cloexec(AF_UNIX, SOCK_STREAM, 0, fd)) {
738 perror("Debug leaking scalars socketpair failed");
744 perror("Debug leaking scalars fork failed");
748 /* We are the child */
749 const int sock = fd[1];
750 const int debug_fd = PerlIO_fileno(Perl_debug_log);
753 /* Our success message is an integer 0, and a char 0 */
754 static const char success[sizeof(int) + 1] = {0};
758 /* We need to close all other file descriptors otherwise we end up
759 with interesting hangs, where the parent closes its end of a
760 pipe, and sits waiting for (another) child to terminate. Only
761 that child never terminates, because it never gets EOF, because
762 we also have the far end of the pipe open. We even need to
763 close the debugging fd, because sometimes it happens to be one
764 end of a pipe, and a process is waiting on the other end for
765 EOF. Normally it would be closed at some point earlier in
766 destruction, but if we happen to cause the pipe to remain open,
767 EOF never occurs, and we get an infinite hang. Hence all the
768 games to pass in a file descriptor if it's actually needed. */
770 f = sysconf(_SC_OPEN_MAX);
772 where = "sysconf failed";
783 union control_un control;
786 struct cmsghdr *cmptr;
790 msg.msg_control = control.control;
791 msg.msg_controllen = sizeof(control.control);
792 /* We're a connected socket so we don't need a source */
796 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
798 vec[0].iov_base = (void*)⌖
799 vec[0].iov_len = sizeof(target);
801 got = recvmsg(sock, &msg, 0);
806 where = "recv failed";
809 if(got < sizeof(target)) {
810 where = "short recv";
814 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
818 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
819 where = "wrong cmsg_len";
822 if(cmptr->cmsg_level != SOL_SOCKET) {
823 where = "wrong cmsg_level";
826 if(cmptr->cmsg_type != SCM_RIGHTS) {
827 where = "wrong cmsg_type";
831 got_fd = *(int*)CMSG_DATA(cmptr);
832 /* For our last little bit of trickery, put the file descriptor
833 back into Perl_debug_log, as if we never actually closed it
835 if(got_fd != debug_fd) {
836 if (PerlLIO_dup2_cloexec(got_fd, debug_fd) == -1) {
843 PerlIO_flush(Perl_debug_log);
845 got = write(sock, &success, sizeof(success));
848 where = "write failed";
851 if(got < sizeof(success)) {
852 where = "short write";
859 int send_errno = errno;
860 unsigned char length = (unsigned char) strlen(where);
861 struct iovec failure[3] = {
862 {(void*)&send_errno, sizeof(send_errno)},
864 {(void*)where, length}
866 int got = writev(sock, failure, 3);
867 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
868 in the parent if we try to read from the socketpair after the
869 child has exited, even if there was data to read.
870 So sleep a bit to give the parent a fighting chance of
873 _exit((got == -1) ? errno : 0);
877 PL_dumper_fd = fd[0];
882 /* We must account for everything. */
884 /* Destroy the main CV and syntax tree */
885 /* Set PL_curcop now, because destroying ops can cause new SVs
886 to be generated in Perl_pad_swipe, and when running with
887 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
888 op from which the filename structure member is copied. */
889 PL_curcop = &PL_compiling;
891 /* ensure comppad/curpad to refer to main's pad */
892 if (CvPADLIST(PL_main_cv)) {
893 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
894 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
896 op_free(PL_main_root);
899 PL_main_start = NULL;
900 /* note that PL_main_cv isn't usually actually freed at this point,
901 * due to the CvOUTSIDE refs from subs compiled within it. It will
902 * get freed once all the subs are freed in sv_clean_all(), for
903 * destruct_level > 0 */
904 SvREFCNT_dec(PL_main_cv);
906 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
908 /* Tell PerlIO we are about to tear things apart in case
909 we have layers which are using resources that should
913 PerlIO_destruct(aTHX);
916 * Try to destruct global references. We do this first so that the
917 * destructors and destructees still exist. Some sv's might remain.
918 * Non-referenced objects are on their own.
922 /* unhook hooks which will soon be, or use, destroyed data */
923 SvREFCNT_dec(PL_warnhook);
925 SvREFCNT_dec(PL_diehook);
928 /* call exit list functions */
929 while (PL_exitlistlen-- > 0)
930 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
932 Safefree(PL_exitlist);
937 SvREFCNT_dec(PL_registered_mros);
939 /* jettison our possibly duplicated environment */
940 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
941 * so we certainly shouldn't free it here
944 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
945 if (environ != PL_origenviron && !PL_use_safe_putenv
947 /* only main thread can free environ[0] contents */
948 && PL_curinterp == aTHX
954 for (i = 0; environ[i]; i++)
955 safesysfree(environ[i]);
957 /* Must use safesysfree() when working with environ. */
958 safesysfree(environ);
960 environ = PL_origenviron;
963 #endif /* !PERL_MICRO */
965 if (destruct_level == 0) {
967 DEBUG_P(debprofdump());
969 #if defined(PERLIO_LAYERS)
970 /* No more IO - including error messages ! */
971 PerlIO_cleanup(aTHX);
974 CopFILE_free(&PL_compiling);
976 /* The exit() function will do everything that needs doing. */
980 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
983 /* the syntax tree is shared between clones
984 * so op_free(PL_main_root) only ReREFCNT_dec's
985 * REGEXPs in the parent interpreter
986 * we need to manually ReREFCNT_dec for the clones
989 I32 i = AvFILLp(PL_regex_padav);
990 SV **ary = AvARRAY(PL_regex_padav);
993 SvREFCNT_dec(ary[i]);
994 ary[i] = &PL_sv_undef;
1000 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
1001 PL_stashcache = NULL;
1003 /* loosen bonds of global variables */
1005 /* XXX can PL_parser still be non-null here? */
1006 if(PL_parser && PL_parser->rsfp) {
1007 (void)PerlIO_close(PL_parser->rsfp);
1008 PL_parser->rsfp = NULL;
1012 Safefree(PL_splitstr);
1022 PL_doswitches = FALSE;
1023 PL_dowarn = G_WARN_OFF;
1024 #ifdef PERL_SAWAMPERSAND
1025 PL_sawampersand = 0; /* must save all match strings */
1029 Safefree(PL_inplace);
1031 SvREFCNT_dec(PL_patchlevel);
1034 SvREFCNT_dec(PL_e_script);
1040 /* magical thingies */
1042 SvREFCNT_dec(PL_ofsgv); /* *, */
1045 SvREFCNT_dec(PL_ors_sv); /* $\ */
1048 SvREFCNT_dec(PL_rs); /* $/ */
1051 Safefree(PL_osname); /* $^O */
1054 SvREFCNT_dec(PL_statname);
1058 /* defgv, aka *_ should be taken care of elsewhere */
1061 Safefree(PL_efloatbuf);
1062 PL_efloatbuf = NULL;
1065 /* startup and shutdown function lists */
1066 SvREFCNT_dec(PL_beginav);
1067 SvREFCNT_dec(PL_beginav_save);
1068 SvREFCNT_dec(PL_endav);
1069 SvREFCNT_dec(PL_checkav);
1070 SvREFCNT_dec(PL_checkav_save);
1071 SvREFCNT_dec(PL_unitcheckav);
1072 SvREFCNT_dec(PL_unitcheckav_save);
1073 SvREFCNT_dec(PL_initav);
1075 PL_beginav_save = NULL;
1078 PL_checkav_save = NULL;
1079 PL_unitcheckav = NULL;
1080 PL_unitcheckav_save = NULL;
1083 /* shortcuts just get cleared */
1086 PL_argvoutgv = NULL;
1089 PL_last_in_gv = NULL;
1100 SvREFCNT_dec(PL_envgv);
1101 SvREFCNT_dec(PL_incgv);
1102 SvREFCNT_dec(PL_argvgv);
1103 SvREFCNT_dec(PL_replgv);
1104 SvREFCNT_dec(PL_DBgv);
1105 SvREFCNT_dec(PL_DBline);
1106 SvREFCNT_dec(PL_DBsub);
1115 SvREFCNT_dec(PL_argvout_stack);
1116 PL_argvout_stack = NULL;
1118 SvREFCNT_dec(PL_modglobal);
1119 PL_modglobal = NULL;
1120 SvREFCNT_dec(PL_preambleav);
1121 PL_preambleav = NULL;
1122 SvREFCNT_dec(PL_subname);
1124 #ifdef PERL_USES_PL_PIDSTATUS
1125 SvREFCNT_dec(PL_pidstatus);
1126 PL_pidstatus = NULL;
1128 SvREFCNT_dec(PL_toptarget);
1129 PL_toptarget = NULL;
1130 SvREFCNT_dec(PL_bodytarget);
1131 PL_bodytarget = NULL;
1132 PL_formtarget = NULL;
1134 /* free locale stuff */
1135 #ifdef USE_LOCALE_COLLATE
1136 Safefree(PL_collation_name);
1137 PL_collation_name = NULL;
1139 #if defined(USE_POSIX_2008_LOCALE) \
1140 && defined(USE_THREAD_SAFE_LOCALE) \
1141 && ! defined(HAS_QUERYLOCALE)
1142 for (i = 0; i < (int) C_ARRAY_LENGTH(PL_curlocales); i++) {
1143 Safefree(PL_curlocales[i]);
1144 PL_curlocales[i] = NULL;
1147 #ifdef HAS_POSIX_2008_LOCALE
1149 /* This also makes sure we aren't using a locale object that gets freed
1151 const locale_t old_locale = uselocale(LC_GLOBAL_LOCALE);
1152 if ( old_locale != LC_GLOBAL_LOCALE
1153 # ifdef USE_POSIX_2008_LOCALE
1154 && old_locale != PL_C_locale_obj
1157 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1158 "%s:%d: Freeing %p\n", __FILE__, __LINE__, old_locale));
1159 freelocale(old_locale);
1162 # ifdef USE_LOCALE_NUMERIC
1163 if (PL_underlying_numeric_obj) {
1164 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1165 "%s:%d: Freeing %p\n", __FILE__, __LINE__,
1166 PL_underlying_numeric_obj));
1167 freelocale(PL_underlying_numeric_obj);
1168 PL_underlying_numeric_obj = (locale_t) NULL;
1172 #ifdef USE_LOCALE_NUMERIC
1173 Safefree(PL_numeric_name);
1174 PL_numeric_name = NULL;
1175 SvREFCNT_dec(PL_numeric_radix_sv);
1176 PL_numeric_radix_sv = NULL;
1179 if (PL_setlocale_buf) {
1180 Safefree(PL_setlocale_buf);
1181 PL_setlocale_buf = NULL;
1184 if (PL_langinfo_buf) {
1185 Safefree(PL_langinfo_buf);
1186 PL_langinfo_buf = NULL;
1189 /* clear character classes */
1190 #ifdef USE_LOCALE_CTYPE
1191 SvREFCNT_dec(PL_warn_locale);
1192 PL_warn_locale = NULL;
1195 if (!specialWARN(PL_compiling.cop_warnings))
1196 PerlMemShared_free(PL_compiling.cop_warnings);
1197 PL_compiling.cop_warnings = NULL;
1198 cophh_free(CopHINTHASH_get(&PL_compiling));
1199 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1200 CopFILE_free(&PL_compiling);
1202 /* Prepare to destruct main symbol table. */
1205 /* break ref loop *:: <=> %:: */
1206 (void)hv_deletes(hv, "main::", G_DISCARD);
1209 SvREFCNT_dec(PL_curstname);
1210 PL_curstname = NULL;
1212 /* clear queued errors */
1213 SvREFCNT_dec(PL_errors);
1216 SvREFCNT_dec(PL_isarev);
1219 if (destruct_level >= 2) {
1220 if (PL_scopestack_ix != 0)
1221 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1222 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1223 (long)PL_scopestack_ix);
1224 if (PL_savestack_ix != 0)
1225 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1226 "Unbalanced saves: %ld more saves than restores\n",
1227 (long)PL_savestack_ix);
1228 if (PL_tmps_floor != -1)
1229 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1230 (long)PL_tmps_floor + 1);
1231 if (cxstack_ix != -1)
1232 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1233 (long)cxstack_ix + 1);
1237 SvREFCNT_dec(PL_regex_padav);
1238 PL_regex_padav = NULL;
1239 PL_regex_pad = NULL;
1242 #ifdef PERL_IMPLICIT_CONTEXT
1243 /* the entries in this list are allocated via SV PVX's, so get freed
1244 * in sv_clean_all */
1245 Safefree(PL_my_cxt_list);
1248 /* Now absolutely destruct everything, somehow or other, loops or no. */
1250 /* the 2 is for PL_fdpid and PL_strtab */
1251 while (sv_clean_all() > 2)
1255 Safefree(PL_stashpad); /* must come after sv_clean_all */
1258 AvREAL_off(PL_fdpid); /* no surviving entries */
1259 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1262 #ifdef HAVE_INTERP_INTERN
1266 /* constant strings */
1267 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1268 SvREFCNT_dec(PL_sv_consts[i]);
1269 PL_sv_consts[i] = NULL;
1272 /* Destruct the global string table. */
1274 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1275 * so that sv_free() won't fail on them.
1276 * Now that the global string table is using a single hunk of memory
1277 * for both HE and HEK, we either need to explicitly unshare it the
1278 * correct way, or actually free things here.
1281 const I32 max = HvMAX(PL_strtab);
1282 HE * const * const array = HvARRAY(PL_strtab);
1283 HE *hent = array[0];
1286 if (hent && ckWARN_d(WARN_INTERNAL)) {
1287 HE * const next = HeNEXT(hent);
1288 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1289 "Unbalanced string table refcount: (%ld) for \"%s\"",
1290 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1297 hent = array[riter];
1302 HvARRAY(PL_strtab) = 0;
1303 HvTOTALKEYS(PL_strtab) = 0;
1305 SvREFCNT_dec(PL_strtab);
1308 /* free the pointer tables used for cloning */
1309 ptr_table_free(PL_ptr_table);
1310 PL_ptr_table = (PTR_TBL_t*)NULL;
1313 /* free special SVs */
1315 SvREFCNT(&PL_sv_yes) = 0;
1316 sv_clear(&PL_sv_yes);
1317 SvANY(&PL_sv_yes) = NULL;
1318 SvFLAGS(&PL_sv_yes) = 0;
1320 SvREFCNT(&PL_sv_no) = 0;
1321 sv_clear(&PL_sv_no);
1322 SvANY(&PL_sv_no) = NULL;
1323 SvFLAGS(&PL_sv_no) = 0;
1325 SvREFCNT(&PL_sv_zero) = 0;
1326 sv_clear(&PL_sv_zero);
1327 SvANY(&PL_sv_zero) = NULL;
1328 SvFLAGS(&PL_sv_zero) = 0;
1332 for (i=0; i<=2; i++) {
1333 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1334 sv_clear(PERL_DEBUG_PAD(i));
1335 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1336 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1340 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1341 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1343 #ifdef DEBUG_LEAKING_SCALARS
1344 if (PL_sv_count != 0) {
1349 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1350 svend = &sva[SvREFCNT(sva)];
1351 for (sv = sva + 1; sv < svend; ++sv) {
1352 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1353 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1355 " refcnt=%" UVuf pTHX__FORMAT "\n"
1356 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1357 "serial %" UVuf "\n",
1358 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1360 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1362 sv->sv_debug_inpad ? "for" : "by",
1363 sv->sv_debug_optype ?
1364 PL_op_name[sv->sv_debug_optype]: "(none)",
1365 PTR2UV(sv->sv_debug_parent),
1368 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1369 Perl_dump_sv_child(aTHX_ sv);
1375 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1379 /* Wait for up to 4 seconds for child to terminate.
1380 This seems to be the least effort way of timing out on reaping
1382 struct timeval waitfor = {4, 0};
1383 int sock = PL_dumper_fd;
1387 FD_SET(sock, &rset);
1388 select(sock + 1, &rset, NULL, NULL, &waitfor);
1389 waitpid(child, &status, WNOHANG);
1394 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1400 #if defined(PERLIO_LAYERS)
1401 /* No more IO - including error messages ! */
1402 PerlIO_cleanup(aTHX);
1405 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1406 as currently layers use it rather than NULL as a marker
1407 for no arg - and will try and SvREFCNT_dec it.
1409 SvREFCNT(&PL_sv_undef) = 0;
1410 SvREADONLY_off(&PL_sv_undef);
1412 Safefree(PL_origfilename);
1413 PL_origfilename = NULL;
1414 Safefree(PL_reg_curpm);
1415 free_tied_hv_pool();
1416 Safefree(PL_op_mask);
1417 Safefree(PL_psig_name);
1418 PL_psig_name = (SV**)NULL;
1419 PL_psig_ptr = (SV**)NULL;
1421 /* We need to NULL PL_psig_pend first, so that
1422 signal handlers know not to use it */
1423 int *psig_save = PL_psig_pend;
1424 PL_psig_pend = (int*)NULL;
1425 Safefree(psig_save);
1428 TAINTING_set(FALSE);
1429 TAINT_WARN_set(FALSE);
1430 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1432 DEBUG_P(debprofdump());
1436 #ifdef USE_REENTRANT_API
1437 Perl_reentrant_free(aTHX);
1440 /* These all point to HVs that are about to be blown away.
1441 Code in core and on CPAN assumes that if the interpreter is re-started
1442 that they will be cleanly NULL or pointing to a valid HV. */
1443 PL_custom_op_names = NULL;
1444 PL_custom_op_descs = NULL;
1445 PL_custom_ops = NULL;
1449 while (PL_regmatch_slab) {
1450 regmatch_slab *s = PL_regmatch_slab;
1451 PL_regmatch_slab = PL_regmatch_slab->next;
1455 /* As the absolutely last thing, free the non-arena SV for mess() */
1458 /* we know that type == SVt_PVMG */
1460 /* it could have accumulated taint magic */
1463 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1464 moremagic = mg->mg_moremagic;
1465 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1467 Safefree(mg->mg_ptr);
1471 /* we know that type >= SVt_PV */
1472 SvPV_free(PL_mess_sv);
1473 Safefree(SvANY(PL_mess_sv));
1474 Safefree(PL_mess_sv);
1481 =for apidoc perl_free
1483 Releases a Perl interpreter. See L<perlembed>.
1493 PERL_ARGS_ASSERT_PERL_FREE;
1495 if (PL_veto_cleanup)
1498 #ifdef PERL_TRACK_MEMPOOL
1501 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1502 * value as we're probably hunting memory leaks then
1504 if (PL_perl_destruct_level == 0) {
1505 const U32 old_debug = PL_debug;
1506 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1507 thread at thread exit. */
1509 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1510 "free this thread's memory\n");
1511 PL_debug &= ~ DEBUG_m_FLAG;
1513 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1514 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1515 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1518 PL_debug = old_debug;
1523 #if defined(WIN32) || defined(NETWARE)
1524 # if defined(PERL_IMPLICIT_SYS)
1527 void *host = nw_internal_host;
1528 PerlMem_free(aTHXx);
1529 nw_delete_internal_host(host);
1531 void *host = w32_internal_host;
1532 PerlMem_free(aTHXx);
1533 win32_delete_internal_host(host);
1537 PerlMem_free(aTHXx);
1540 PerlMem_free(aTHXx);
1544 #if defined(USE_ITHREADS)
1545 /* provide destructors to clean up the thread key when libperl is unloaded */
1546 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1548 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1549 #pragma fini "perl_fini"
1550 #elif defined(__sun) && !defined(__GNUC__)
1551 #pragma fini (perl_fini)
1555 #if defined(__GNUC__)
1556 __attribute__((destructor))
1562 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1565 PL_curinterp && !PL_veto_cleanup)
1570 #endif /* THREADS */
1573 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1575 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1576 PL_exitlist[PL_exitlistlen].fn = fn;
1577 PL_exitlist[PL_exitlistlen].ptr = ptr;
1582 =for apidoc perl_parse
1584 Tells a Perl interpreter to parse a Perl script. This performs most
1585 of the initialisation of a Perl interpreter. See L<perlembed> for
1588 C<my_perl> points to the Perl interpreter that is to parse the script.
1589 It must have been previously created through the use of L</perl_alloc>
1590 and L</perl_construct>. C<xsinit> points to a callback function that
1591 will be called to set up the ability for this Perl interpreter to load
1592 XS extensions, or may be null to perform no such setup.
1594 C<argc> and C<argv> supply a set of command-line arguments to the Perl
1595 interpreter, as would normally be passed to the C<main> function of
1596 a C program. C<argv[argc]> must be null. These arguments are where
1597 the script to parse is specified, either by naming a script file or by
1598 providing a script in a C<-e> option.
1599 If L<C<$0>|perlvar/$0> will be written to in the Perl interpreter, then
1600 the argument strings must be in writable memory, and so mustn't just be
1603 C<env> specifies a set of environment variables that will be used by
1604 this Perl interpreter. If non-null, it must point to a null-terminated
1605 array of environment strings. If null, the Perl interpreter will use
1606 the environment supplied by the C<environ> global variable.
1608 This function initialises the interpreter, and parses and compiles the
1609 script specified by the command-line arguments. This includes executing
1610 code in C<BEGIN>, C<UNITCHECK>, and C<CHECK> blocks. It does not execute
1611 C<INIT> blocks or the main program.
1613 Returns an integer of slightly tricky interpretation. The correct
1614 use of the return value is as a truth value indicating whether there
1615 was a failure in initialisation. If zero is returned, this indicates
1616 that initialisation was successful, and it is safe to proceed to call
1617 L</perl_run> and make other use of it. If a non-zero value is returned,
1618 this indicates some problem that means the interpreter wants to terminate.
1619 The interpreter should not be just abandoned upon such failure; the caller
1620 should proceed to shut the interpreter down cleanly with L</perl_destruct>
1621 and free it with L</perl_free>.
1623 For historical reasons, the non-zero return value also attempts to
1624 be a suitable value to pass to the C library function C<exit> (or to
1625 return from C<main>), to serve as an exit code indicating the nature
1626 of the way initialisation terminated. However, this isn't portable,
1627 due to differing exit code conventions. A historical bug is preserved
1628 for the time being: if the Perl built-in C<exit> is called during this
1629 function's execution, with a type of exit entailing a zero exit code
1630 under the host operating system's conventions, then this function
1631 returns zero rather than a non-zero value. This bug, [perl #2754],
1632 leads to C<perl_run> being called (and therefore C<INIT> blocks and the
1633 main program running) despite a call to C<exit>. It has been preserved
1634 because a popular module-installing module has come to rely on it and
1635 needs time to be fixed. This issue is [perl #132577], and the original
1636 bug is due to be fixed in Perl 5.30.
1641 #define SET_CURSTASH(newstash) \
1642 if (PL_curstash != newstash) { \
1643 SvREFCNT_dec(PL_curstash); \
1644 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1648 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1655 PERL_ARGS_ASSERT_PERL_PARSE;
1656 #ifndef MULTIPLICITY
1657 PERL_UNUSED_ARG(my_perl);
1659 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1661 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1663 if (s && strEQ(s, "1")) {
1664 const unsigned char *seed= PERL_HASH_SEED;
1665 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1666 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1667 while (seed < seed_end) {
1668 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1670 #ifdef PERL_HASH_RANDOMIZE_KEYS
1671 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1672 PL_HASH_RAND_BITS_ENABLED,
1673 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1675 PerlIO_printf(Perl_debug_log, "\n");
1678 #endif /* #if (defined(USE_HASH_SEED) ... */
1682 struct NameTranslationInfo nti;
1683 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1690 for(i = 0; i != argc; i++)
1692 assert(!argv[argc]);
1697 if (PL_origalen != 0) {
1698 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1701 /* Set PL_origalen be the sum of the contiguous argv[]
1702 * elements plus the size of the env in case that it is
1703 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1704 * as the maximum modifiable length of $0. In the worst case
1705 * the area we are able to modify is limited to the size of
1706 * the original argv[0]. (See below for 'contiguous', though.)
1708 const char *s = NULL;
1709 const UV mask = ~(UV)(PTRSIZE-1);
1710 /* Do the mask check only if the args seem like aligned. */
1712 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1714 /* See if all the arguments are contiguous in memory. Note
1715 * that 'contiguous' is a loose term because some platforms
1716 * align the argv[] and the envp[]. If the arguments look
1717 * like non-aligned, assume that they are 'strictly' or
1718 * 'traditionally' contiguous. If the arguments look like
1719 * aligned, we just check that they are within aligned
1720 * PTRSIZE bytes. As long as no system has something bizarre
1721 * like the argv[] interleaved with some other data, we are
1722 * fine. (Did I just evoke Murphy's Law?) --jhi */
1723 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1726 for (i = 1; i < PL_origargc; i++) {
1727 if ((PL_origargv[i] == s + 1
1729 || PL_origargv[i] == s + 2
1734 (PL_origargv[i] > s &&
1736 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1747 #ifndef PERL_USE_SAFE_PUTENV
1748 /* Can we grab env area too to be used as the area for $0? */
1749 if (s && PL_origenviron && !PL_use_safe_putenv) {
1750 if ((PL_origenviron[0] == s + 1)
1753 (PL_origenviron[0] > s &&
1754 PL_origenviron[0] <=
1755 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1759 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1760 s = PL_origenviron[0];
1763 my_setenv("NoNe SuCh", NULL);
1764 /* Force copy of environment. */
1765 for (i = 1; PL_origenviron[i]; i++) {
1766 if (PL_origenviron[i] == s + 1
1769 (PL_origenviron[i] > s &&
1770 PL_origenviron[i] <=
1771 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1774 s = PL_origenviron[i];
1782 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1784 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1789 /* Come here if running an undumped a.out. */
1791 PL_origfilename = savepv(argv[0]);
1792 PL_do_undump = FALSE;
1793 cxstack_ix = -1; /* start label stack again */
1795 assert (!TAINT_get);
1799 init_postdump_symbols(argc,argv,env);
1804 op_free(PL_main_root);
1805 PL_main_root = NULL;
1807 PL_main_start = NULL;
1808 SvREFCNT_dec(PL_main_cv);
1812 oldscope = PL_scopestack_ix;
1813 PL_dowarn = G_WARN_OFF;
1818 parse_body(env,xsinit);
1819 if (PL_unitcheckav) {
1820 call_list(oldscope, PL_unitcheckav);
1823 PERL_SET_PHASE(PERL_PHASE_CHECK);
1824 call_list(oldscope, PL_checkav);
1832 /* my_exit() was called */
1833 while (PL_scopestack_ix > oldscope)
1836 SET_CURSTASH(PL_defstash);
1837 if (PL_unitcheckav) {
1838 call_list(oldscope, PL_unitcheckav);
1841 PERL_SET_PHASE(PERL_PHASE_CHECK);
1842 call_list(oldscope, PL_checkav);
1847 * At this point we should do
1849 * to avoid [perl #2754], but that bugfix has been postponed
1850 * because of the Module::Install breakage it causes
1856 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1864 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1865 miniperl, and we need to see those flags reflected in the values here. */
1867 /* What this returns is subject to change. Use the public interface in Config.
1870 S_Internals_V(pTHX_ CV *cv)
1873 #ifdef LOCAL_PATCH_COUNT
1874 const int local_patch_count = LOCAL_PATCH_COUNT;
1876 const int local_patch_count = 0;
1878 const int entries = 3 + local_patch_count;
1880 static const char non_bincompat_options[] =
1887 # ifdef NO_HASH_SEED
1890 # ifdef NO_TAINT_SUPPORT
1893 # ifdef PERL_BOOL_AS_CHAR
1894 " PERL_BOOL_AS_CHAR"
1896 # ifdef PERL_COPY_ON_WRITE
1897 " PERL_COPY_ON_WRITE"
1899 # ifdef PERL_DISABLE_PMC
1902 # ifdef PERL_DONT_CREATE_GVSV
1903 " PERL_DONT_CREATE_GVSV"
1905 # ifdef PERL_EXTERNAL_GLOB
1906 " PERL_EXTERNAL_GLOB"
1908 # ifdef PERL_HASH_FUNC_SIPHASH
1909 " PERL_HASH_FUNC_SIPHASH"
1911 # ifdef PERL_HASH_FUNC_SDBM
1912 " PERL_HASH_FUNC_SDBM"
1914 # ifdef PERL_HASH_FUNC_DJB2
1915 " PERL_HASH_FUNC_DJB2"
1917 # ifdef PERL_HASH_FUNC_SUPERFAST
1918 " PERL_HASH_FUNC_SUPERFAST"
1920 # ifdef PERL_HASH_FUNC_MURMUR3
1921 " PERL_HASH_FUNC_MURMUR3"
1923 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1924 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1926 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1927 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1929 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1930 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1932 # ifdef PERL_IS_MINIPERL
1935 # ifdef PERL_MALLOC_WRAP
1938 # ifdef PERL_MEM_LOG
1941 # ifdef PERL_MEM_LOG_NOIMPL
1942 " PERL_MEM_LOG_NOIMPL"
1944 # ifdef PERL_OP_PARENT
1947 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1948 " PERL_PERTURB_KEYS_DETERMINISTIC"
1950 # ifdef PERL_PERTURB_KEYS_DISABLED
1951 " PERL_PERTURB_KEYS_DISABLED"
1953 # ifdef PERL_PERTURB_KEYS_RANDOM
1954 " PERL_PERTURB_KEYS_RANDOM"
1956 # ifdef PERL_PRESERVE_IVUV
1957 " PERL_PRESERVE_IVUV"
1959 # ifdef PERL_RELOCATABLE_INCPUSH
1960 " PERL_RELOCATABLE_INCPUSH"
1962 # ifdef PERL_USE_DEVEL
1965 # ifdef PERL_USE_SAFE_PUTENV
1966 " PERL_USE_SAFE_PUTENV"
1968 # ifdef SILENT_NO_TAINT_SUPPORT
1969 " SILENT_NO_TAINT_SUPPORT"
1971 # ifdef UNLINK_ALL_VERSIONS
1972 " UNLINK_ALL_VERSIONS"
1974 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1975 " USE_ATTRIBUTES_FOR_PERLIO"
1977 # ifdef USE_FAST_STDIO
1983 # ifdef USE_LOCALE_CTYPE
1986 # ifdef WIN32_NO_REGISTRY
1989 # ifdef USE_PERL_ATOF
1992 # ifdef USE_SITECUSTOMIZE
1993 " USE_SITECUSTOMIZE"
1995 # ifdef USE_THREAD_SAFE_LOCALE
1996 " USE_THREAD_SAFE_LOCALE"
1999 PERL_UNUSED_ARG(cv);
2000 PERL_UNUSED_VAR(items);
2002 EXTEND(SP, entries);
2004 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
2005 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
2006 sizeof(non_bincompat_options) - 1, SVs_TEMP));
2008 #ifndef PERL_BUILD_DATE
2011 # define PERL_BUILD_DATE __DATE__ " " __TIME__
2013 # define PERL_BUILD_DATE __DATE__
2018 #ifdef PERL_BUILD_DATE
2019 PUSHs(Perl_newSVpvn_flags(aTHX_
2020 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
2023 PUSHs(&PL_sv_undef);
2026 for (i = 1; i <= local_patch_count; i++) {
2027 /* This will be an undef, if PL_localpatches[i] is NULL. */
2028 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
2034 #define INCPUSH_UNSHIFT 0x01
2035 #define INCPUSH_ADD_OLD_VERS 0x02
2036 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
2037 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
2038 #define INCPUSH_NOT_BASEDIR 0x10
2039 #define INCPUSH_CAN_RELOCATE 0x20
2040 #define INCPUSH_ADD_SUB_DIRS \
2041 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
2044 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
2048 int argc = PL_origargc;
2049 char **argv = PL_origargv;
2050 const char *scriptname = NULL;
2051 bool dosearch = FALSE;
2053 bool doextract = FALSE;
2054 const char *cddir = NULL;
2055 #ifdef USE_SITECUSTOMIZE
2056 bool minus_f = FALSE;
2058 SV *linestr_sv = NULL;
2059 bool add_read_e_script = FALSE;
2060 U32 lex_start_flags = 0;
2062 PERL_SET_PHASE(PERL_PHASE_START);
2068 for (argc--,argv++; argc > 0; argc--,argv++) {
2069 if (argv[0][0] != '-' || !argv[0][1])
2075 #ifndef PERL_STRICT_CR
2099 if ((s = moreswitches(s)))
2104 #if defined(SILENT_NO_TAINT_SUPPORT)
2105 /* silently ignore */
2106 #elif defined(NO_TAINT_SUPPORT)
2107 Perl_croak_nocontext("This perl was compiled without taint support. "
2108 "Cowardly refusing to run with -t or -T flags");
2110 CHECK_MALLOC_TOO_LATE_FOR('t');
2111 if( !TAINTING_get ) {
2112 TAINT_WARN_set(TRUE);
2119 #if defined(SILENT_NO_TAINT_SUPPORT)
2120 /* silently ignore */
2121 #elif defined(NO_TAINT_SUPPORT)
2122 Perl_croak_nocontext("This perl was compiled without taint support. "
2123 "Cowardly refusing to run with -t or -T flags");
2125 CHECK_MALLOC_TOO_LATE_FOR('T');
2127 TAINT_WARN_set(FALSE);
2136 forbid_setid('e', FALSE);
2138 PL_e_script = newSVpvs("");
2139 add_read_e_script = TRUE;
2142 sv_catpv(PL_e_script, s);
2144 sv_catpv(PL_e_script, argv[1]);
2148 Perl_croak(aTHX_ "No code specified for -%c", c);
2149 sv_catpvs(PL_e_script, "\n");
2153 #ifdef USE_SITECUSTOMIZE
2159 case 'I': /* -I handled both here and in moreswitches() */
2160 forbid_setid('I', FALSE);
2161 if (!*++s && (s=argv[1]) != NULL) {
2165 STRLEN len = strlen(s);
2166 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2169 Perl_croak(aTHX_ "No directory specified for -I");
2172 forbid_setid('S', FALSE);
2181 opts_prog = newSVpvs("use Config; Config::_V()");
2185 opts_prog = Perl_newSVpvf(aTHX_
2186 "use Config; Config::config_vars(qw%c%s%c)",
2190 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2191 /* don't look for script or read stdin */
2192 scriptname = BIT_BUCKET;
2204 if (!*++s || isSPACE(*s)) {
2208 /* catch use of gnu style long options.
2209 Both of these exit immediately. */
2210 if (strEQ(s, "version"))
2212 if (strEQ(s, "help"))
2217 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2228 #ifndef SECURE_INTERNAL_GETENV
2231 (s = PerlEnv_getenv("PERL5OPT")))
2233 /* s points to static memory in getenv(), which may be overwritten at
2234 * any time; use a mortal copy instead */
2235 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2239 if (*s == '-' && *(s+1) == 'T') {
2240 #if defined(SILENT_NO_TAINT_SUPPORT)
2241 /* silently ignore */
2242 #elif defined(NO_TAINT_SUPPORT)
2243 Perl_croak_nocontext("This perl was compiled without taint support. "
2244 "Cowardly refusing to run with -t or -T flags");
2246 CHECK_MALLOC_TOO_LATE_FOR('T');
2248 TAINT_WARN_set(FALSE);
2252 char *popt_copy = NULL;
2265 if (!strchr("CDIMUdmtwW", *s))
2266 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2270 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2271 s = popt_copy + (s - d);
2279 #if defined(SILENT_NO_TAINT_SUPPORT)
2280 /* silently ignore */
2281 #elif defined(NO_TAINT_SUPPORT)
2282 Perl_croak_nocontext("This perl was compiled without taint support. "
2283 "Cowardly refusing to run with -t or -T flags");
2285 if( !TAINTING_get) {
2286 TAINT_WARN_set(TRUE);
2298 #ifndef NO_PERL_INTERNAL_RAND_SEED
2299 /* If we're not set[ug]id, we might have honored
2300 PERL_INTERNAL_RAND_SEED in perl_construct().
2301 At this point command-line options have been parsed, so if
2302 we're now tainting and not set[ug]id re-seed.
2303 This could possibly be wasteful if PERL_INTERNAL_RAND_SEED is invalid,
2304 but avoids duplicating the logic from perl_construct().
2307 PerlProc_getuid() == PerlProc_geteuid() &&
2308 PerlProc_getgid() == PerlProc_getegid()) {
2309 Perl_drand48_init_r(&PL_internal_random_state, seed());
2313 /* Set $^X early so that it can be used for relocatable paths in @INC */
2314 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2315 assert (!TAINT_get);
2320 #if defined(USE_SITECUSTOMIZE)
2322 /* The games with local $! are to avoid setting errno if there is no
2323 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2324 ie a q() operator with a NUL byte as a the delimiter. This avoids
2325 problems with pathnames containing (say) ' */
2326 # ifdef PERL_IS_MINIPERL
2327 AV *const inc = GvAV(PL_incgv);
2328 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2331 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2332 it should be reported immediately as a build failure. */
2333 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2335 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2336 "do {local $!; -f $f }"
2337 " and do $f || die $@ || qq '$f: $!' }",
2338 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2341 /* SITELIB_EXP is a function call on Win32. */
2342 const char *const raw_sitelib = SITELIB_EXP;
2344 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2345 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2346 INCPUSH_CAN_RELOCATE);
2347 const char *const sitelib = SvPVX(sitelib_sv);
2348 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2350 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2351 0, SVfARG(sitelib), 0,
2352 0, SVfARG(sitelib), 0));
2353 assert (SvREFCNT(sitelib_sv) == 1);
2354 SvREFCNT_dec(sitelib_sv);
2361 scriptname = argv[0];
2364 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2366 else if (scriptname == NULL) {
2368 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2374 assert (!TAINT_get);
2378 bool suidscript = FALSE;
2380 rsfp = open_script(scriptname, dosearch, &suidscript);
2382 rsfp = PerlIO_stdin();
2383 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2386 validate_suid(rsfp);
2389 # if defined(SIGCHLD) || defined(SIGCLD)
2392 # define SIGCHLD SIGCLD
2394 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2395 if (sigstate == (Sighandler_t) SIG_IGN) {
2396 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2397 "Can't ignore signal CHLD, forcing to default");
2398 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2406 /* This will croak if suidscript is true, as -x cannot be used with
2408 forbid_setid('x', suidscript);
2409 /* Hence you can't get here if suidscript is true */
2411 linestr_sv = newSV_type(SVt_PV);
2412 lex_start_flags |= LEX_START_COPIED;
2413 find_beginning(linestr_sv, rsfp);
2414 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2415 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2419 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2420 CvUNIQUE_on(PL_compcv);
2422 CvPADLIST_set(PL_compcv, pad_new(0));
2424 PL_isarev = newHV();
2427 boot_core_UNIVERSAL();
2429 newXS("Internals::V", S_Internals_V, __FILE__);
2432 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2434 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2440 # ifdef HAS_SOCKS5_INIT
2441 socks5_init(argv[0]);
2447 init_predump_symbols();
2448 /* init_postdump_symbols not currently designed to be called */
2449 /* more than once (ENV isn't cleared first, for example) */
2450 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2452 init_postdump_symbols(argc,argv,env);
2454 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2455 * or explicitly in some platforms.
2456 * PL_utf8locale is conditionally turned on by
2457 * locale.c:Perl_init_i18nl10n() if the environment
2458 * look like the user wants to use UTF-8. */
2459 #if defined(__SYMBIAN32__)
2460 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2462 # ifndef PERL_IS_MINIPERL
2464 /* Requires init_predump_symbols(). */
2465 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2470 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2471 * and the default open disciplines. */
2472 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2473 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2475 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2476 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2477 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2479 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2480 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2481 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2483 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2484 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2485 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2487 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2488 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2491 sv_setpvs(sv, ":utf8\0:utf8");
2493 sv_setpvs(sv, ":utf8\0");
2496 sv_setpvs(sv, "\0:utf8");
2505 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2506 if (strEQ(s, "unsafe"))
2507 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2508 else if (strEQ(s, "safe"))
2509 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2511 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2516 lex_start(linestr_sv, rsfp, lex_start_flags);
2517 SvREFCNT_dec(linestr_sv);
2519 PL_subname = newSVpvs("main");
2521 if (add_read_e_script)
2522 filter_add(read_e_script, NULL);
2524 /* now parse the script */
2526 SETERRNO(0,SS_NORMAL);
2527 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2528 abort_execution("", PL_origfilename);
2530 CopLINE_set(PL_curcop, 0);
2531 SET_CURSTASH(PL_defstash);
2533 SvREFCNT_dec(PL_e_script);
2541 SAVECOPFILE(PL_curcop);
2542 SAVECOPLINE(PL_curcop);
2543 gv_check(PL_defstash);
2553 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2554 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2555 dump_mstats("after compilation:");
2560 PL_restartjmpenv = NULL;
2566 =for apidoc perl_run
2568 Tells a Perl interpreter to run its main program. See L<perlembed>
2571 C<my_perl> points to the Perl interpreter. It must have been previously
2572 created through the use of L</perl_alloc> and L</perl_construct>, and
2573 initialised through L</perl_parse>. This function should not be called
2574 if L</perl_parse> returned a non-zero value, indicating a failure in
2575 initialisation or compilation.
2577 This function executes code in C<INIT> blocks, and then executes the
2578 main program. The code to be executed is that established by the prior
2579 call to L</perl_parse>. If the interpreter's C<PL_exit_flags> word
2580 does not have the C<PERL_EXIT_DESTRUCT_END> flag set, then this function
2581 will also execute code in C<END> blocks. If it is desired to make any
2582 further use of the interpreter after calling this function, then C<END>
2583 blocks should be postponed to L</perl_destruct> time by setting that flag.
2585 Returns an integer of slightly tricky interpretation. The correct use
2586 of the return value is as a truth value indicating whether the program
2587 terminated non-locally. If zero is returned, this indicates that
2588 the program ran to completion, and it is safe to make other use of the
2589 interpreter (provided that the C<PERL_EXIT_DESTRUCT_END> flag was set as
2590 described above). If a non-zero value is returned, this indicates that
2591 the interpreter wants to terminate early. The interpreter should not be
2592 just abandoned because of this desire to terminate; the caller should
2593 proceed to shut the interpreter down cleanly with L</perl_destruct>
2594 and free it with L</perl_free>.
2596 For historical reasons, the non-zero return value also attempts to
2597 be a suitable value to pass to the C library function C<exit> (or to
2598 return from C<main>), to serve as an exit code indicating the nature of
2599 the way the program terminated. However, this isn't portable, due to
2600 differing exit code conventions. An attempt is made to return an exit
2601 code of the type required by the host operating system, but because
2602 it is constrained to be non-zero, it is not necessarily possible to
2603 indicate every type of exit. It is only reliable on Unix, where a zero
2604 exit code can be augmented with a set bit that will be ignored. In any
2605 case, this function is not the correct place to acquire an exit code:
2606 one should get that from L</perl_destruct>.
2618 PERL_ARGS_ASSERT_PERL_RUN;
2619 #ifndef MULTIPLICITY
2620 PERL_UNUSED_ARG(my_perl);
2623 oldscope = PL_scopestack_ix;
2631 cxstack_ix = -1; /* start context stack again */
2633 case 0: /* normal completion */
2637 case 2: /* my_exit() */
2638 while (PL_scopestack_ix > oldscope)
2641 SET_CURSTASH(PL_defstash);
2642 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2643 PL_endav && !PL_minus_c) {
2644 PERL_SET_PHASE(PERL_PHASE_END);
2645 call_list(oldscope, PL_endav);
2648 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2649 dump_mstats("after execution: ");
2655 POPSTACK_TO(PL_mainstack);
2658 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2669 S_run_body(pTHX_ I32 oldscope)
2671 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2672 PL_sawampersand ? "Enabling" : "Omitting",
2673 (unsigned int)(PL_sawampersand)));
2675 if (!PL_restartop) {
2677 if (DEBUG_x_TEST || DEBUG_B_TEST)
2678 dump_all_perl(!DEBUG_B_TEST);
2680 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2684 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2687 if (PERLDB_SINGLE && PL_DBsingle)
2690 PERL_SET_PHASE(PERL_PHASE_INIT);
2691 call_list(oldscope, PL_initav);
2693 #ifdef PERL_DEBUG_READONLY_OPS
2694 if (PL_main_root && PL_main_root->op_slabbed)
2695 Slab_to_ro(OpSLAB(PL_main_root));
2701 PERL_SET_PHASE(PERL_PHASE_RUN);
2704 PL_restartjmpenv = NULL;
2705 PL_op = PL_restartop;
2709 else if (PL_main_start) {
2710 CvDEPTH(PL_main_cv) = 1;
2711 PL_op = PL_main_start;
2715 NOT_REACHED; /* NOTREACHED */
2719 =head1 SV Manipulation Functions
2723 Returns the SV of the specified Perl scalar. C<flags> are passed to
2724 C<gv_fetchpv>. If C<GV_ADD> is set and the
2725 Perl variable does not exist then it will be created. If C<flags> is zero
2726 and the variable does not exist then NULL is returned.
2732 Perl_get_sv(pTHX_ const char *name, I32 flags)
2736 PERL_ARGS_ASSERT_GET_SV;
2738 gv = gv_fetchpv(name, flags, SVt_PV);
2745 =head1 Array Manipulation Functions
2749 Returns the AV of the specified Perl global or package array with the given
2750 name (so it won't work on lexical variables). C<flags> are passed
2751 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2752 Perl variable does not exist then it will be created. If C<flags> is zero
2753 and the variable does not exist then NULL is returned.
2755 Perl equivalent: C<@{"$name"}>.
2761 Perl_get_av(pTHX_ const char *name, I32 flags)
2763 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2765 PERL_ARGS_ASSERT_GET_AV;
2775 =head1 Hash Manipulation Functions
2779 Returns the HV of the specified Perl hash. C<flags> are passed to
2780 C<gv_fetchpv>. If C<GV_ADD> is set and the
2781 Perl variable does not exist then it will be created. If C<flags> is zero
2782 and the variable does not exist then C<NULL> is returned.
2788 Perl_get_hv(pTHX_ const char *name, I32 flags)
2790 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2792 PERL_ARGS_ASSERT_GET_HV;
2802 =head1 CV Manipulation Functions
2804 =for apidoc get_cvn_flags
2806 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2807 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2808 exist then it will be declared (which has the same effect as saying
2809 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2810 then NULL is returned.
2814 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2820 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2822 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2824 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2826 if (gv && UNLIKELY(SvROK(gv)) && SvTYPE(SvRV((SV *)gv)) == SVt_PVCV)
2827 return (CV*)SvRV((SV *)gv);
2829 /* XXX this is probably not what they think they're getting.
2830 * It has the same effect as "sub name;", i.e. just a forward
2832 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2833 return newSTUB(gv,0);
2840 /* Nothing in core calls this now, but we can't replace it with a macro and
2841 move it to mathoms.c as a macro would evaluate name twice. */
2843 Perl_get_cv(pTHX_ const char *name, I32 flags)
2845 PERL_ARGS_ASSERT_GET_CV;
2847 return get_cvn_flags(name, strlen(name), flags);
2850 /* Be sure to refetch the stack pointer after calling these routines. */
2854 =head1 Callback Functions
2856 =for apidoc call_argv
2858 Performs a callback to the specified named and package-scoped Perl subroutine
2859 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2862 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2868 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2870 /* See G_* flags in cop.h */
2871 /* null terminated arg list */
2875 PERL_ARGS_ASSERT_CALL_ARGV;
2879 mXPUSHs(newSVpv(*argv,0));
2883 return call_pv(sub_name, flags);
2889 Performs a callback to the specified Perl sub. See L<perlcall>.
2895 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2896 /* name of the subroutine */
2897 /* See G_* flags in cop.h */
2899 PERL_ARGS_ASSERT_CALL_PV;
2901 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2905 =for apidoc call_method
2907 Performs a callback to the specified Perl method. The blessed object must
2908 be on the stack. See L<perlcall>.
2914 Perl_call_method(pTHX_ const char *methname, I32 flags)
2915 /* name of the subroutine */
2916 /* See G_* flags in cop.h */
2920 PERL_ARGS_ASSERT_CALL_METHOD;
2922 len = strlen(methname);
2923 sv = flags & G_METHOD_NAMED
2924 ? sv_2mortal(newSVpvn_share(methname, len,0))
2925 : newSVpvn_flags(methname, len, SVs_TEMP);
2927 return call_sv(sv, flags | G_METHOD);
2930 /* May be called with any of a CV, a GV, or an SV containing the name. */
2934 Performs a callback to the Perl sub specified by the SV.
2936 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2937 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2938 or C<SvPV(sv)> will be used as the name of the sub to call.
2940 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2941 C<SvPV(sv)> will be used as the name of the method to call.
2943 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2944 the name of the method to call.
2946 Some other values are treated specially for internal use and should
2951 =for apidoc Amnh||G_METHOD
2952 =for apidoc Amnh||G_METHOD_NAMED
2958 Perl_call_sv(pTHX_ SV *sv, volatile I32 flags)
2959 /* See G_* flags in cop.h */
2962 LOGOP myop; /* fake syntax tree node */
2965 volatile I32 retval = 0;
2966 bool oldcatch = CATCH_GET;
2968 OP* const oldop = PL_op;
2971 PERL_ARGS_ASSERT_CALL_SV;
2973 if (flags & G_DISCARD) {
2977 if (!(flags & G_WANT)) {
2978 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2983 Zero(&myop, 1, LOGOP);
2984 if (!(flags & G_NOARGS))
2985 myop.op_flags |= OPf_STACKED;
2986 myop.op_flags |= OP_GIMME_REVERSE(flags);
2990 if (!(flags & G_METHOD_NAMED)) {
2998 if (PERLDB_SUB && PL_curstash != PL_debstash
2999 /* Handle first BEGIN of -d. */
3000 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
3001 /* Try harder, since this may have been a sighandler, thus
3002 * curstash may be meaningless. */
3003 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
3004 && !(flags & G_NODEBUG))
3005 myop.op_private |= OPpENTERSUB_DB;
3007 if (flags & (G_METHOD|G_METHOD_NAMED)) {
3008 Zero(&method_op, 1, METHOP);
3009 method_op.op_next = (OP*)&myop;
3010 PL_op = (OP*)&method_op;
3011 if ( flags & G_METHOD_NAMED ) {
3012 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
3013 method_op.op_type = OP_METHOD_NAMED;
3014 method_op.op_u.op_meth_sv = sv;
3016 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
3017 method_op.op_type = OP_METHOD;
3019 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
3020 myop.op_type = OP_ENTERSUB;
3023 if (!(flags & G_EVAL)) {
3025 CALL_BODY_SUB((OP*)&myop);
3026 retval = PL_stack_sp - (PL_stack_base + oldmark);
3027 CATCH_SET(oldcatch);
3031 myop.op_other = (OP*)&myop;
3033 old_cxix = cxstack_ix;
3034 create_eval_scope(NULL, flags|G_FAKINGEVAL);
3042 CALL_BODY_SUB((OP*)&myop);
3043 retval = PL_stack_sp - (PL_stack_base + oldmark);
3044 if (!(flags & G_KEEPERR)) {
3052 /* my_exit() was called */
3053 SET_CURSTASH(PL_defstash);
3057 NOT_REACHED; /* NOTREACHED */
3060 PL_restartjmpenv = NULL;
3061 PL_op = PL_restartop;
3065 PL_stack_sp = PL_stack_base + oldmark;
3066 if ((flags & G_WANT) == G_ARRAY)
3070 *++PL_stack_sp = &PL_sv_undef;
3075 /* if we croaked, depending on how we croaked the eval scope
3076 * may or may not have already been popped */
3077 if (cxstack_ix > old_cxix) {
3078 assert(cxstack_ix == old_cxix + 1);
3079 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
3080 delete_eval_scope();
3085 if (flags & G_DISCARD) {
3086 PL_stack_sp = PL_stack_base + oldmark;
3095 /* Eval a string. The G_EVAL flag is always assumed. */
3100 Tells Perl to C<eval> the string in the SV. It supports the same flags
3101 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
3103 The C<G_RETHROW> flag can be used if you only need eval_sv() to
3104 execute code specified by a string, but not catch any errors.
3110 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
3112 /* See G_* flags in cop.h */
3115 UNOP myop; /* fake syntax tree node */
3116 volatile I32 oldmark;
3117 volatile I32 retval = 0;
3119 OP* const oldop = PL_op;
3122 PERL_ARGS_ASSERT_EVAL_SV;
3124 if (flags & G_DISCARD) {
3131 Zero(&myop, 1, UNOP);
3134 oldmark = SP - PL_stack_base;
3140 if (!(flags & G_NOARGS))
3141 myop.op_flags = OPf_STACKED;
3142 myop.op_type = OP_ENTEREVAL;
3143 myop.op_flags |= OP_GIMME_REVERSE(flags);
3144 if (flags & G_KEEPERR)
3145 myop.op_flags |= OPf_SPECIAL;
3147 if (flags & G_RE_REPARSING)
3148 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
3150 /* fail now; otherwise we could fail after the JMPENV_PUSH but
3151 * before a cx_pusheval(), which corrupts the stack after a croak */
3152 TAINT_PROPER("eval_sv()");
3158 if (PL_op == (OP*)(&myop)) {
3159 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
3161 goto fail; /* failed in compilation */
3164 retval = PL_stack_sp - (PL_stack_base + oldmark);
3165 if (!(flags & G_KEEPERR)) {
3173 /* my_exit() was called */
3174 SET_CURSTASH(PL_defstash);
3178 NOT_REACHED; /* NOTREACHED */
3181 PL_restartjmpenv = NULL;
3182 PL_op = PL_restartop;
3187 if (flags & G_RETHROW) {
3192 PL_stack_sp = PL_stack_base + oldmark;
3193 if ((flags & G_WANT) == G_ARRAY)
3197 *++PL_stack_sp = &PL_sv_undef;
3203 if (flags & G_DISCARD) {
3204 PL_stack_sp = PL_stack_base + oldmark;
3216 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3222 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3224 SV* sv = newSVpv(p, 0);
3226 PERL_ARGS_ASSERT_EVAL_PV;
3228 if (croak_on_error) {
3230 eval_sv(sv, G_SCALAR | G_RETHROW);
3233 eval_sv(sv, G_SCALAR);
3246 /* Require a module. */
3249 =head1 Embedding Functions
3251 =for apidoc require_pv
3253 Tells Perl to C<require> the file named by the string argument. It is
3254 analogous to the Perl code C<eval "require '$file'">. It's even
3255 implemented that way; consider using load_module instead.
3260 Perl_require_pv(pTHX_ const char *pv)
3265 PERL_ARGS_ASSERT_REQUIRE_PV;
3267 PUSHSTACKi(PERLSI_REQUIRE);
3268 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3269 eval_sv(sv_2mortal(sv), G_DISCARD);
3274 S_usage(pTHX) /* XXX move this out into a module ? */
3276 /* This message really ought to be max 23 lines.
3277 * Removed -h because the user already knows that option. Others? */
3279 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3280 minimum of 509 character string literals. */
3281 static const char * const usage_msg[] = {
3282 " -0[octal] specify record separator (\\0, if no argument)\n"
3283 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3284 " -C[number/list] enables the listed Unicode features\n"
3285 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3286 " -d[:debugger] run program under debugger\n"
3287 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3288 " -e program one line of program (several -e's allowed, omit programfile)\n"
3289 " -E program like -e, but enables all optional features\n"
3290 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3291 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3292 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3293 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3294 " -l[octal] enable line ending processing, specifies line terminator\n"
3295 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3296 " -n assume \"while (<>) { ... }\" loop around program\n"
3297 " -p assume loop like -n but print line also, like sed\n"
3298 " -s enable rudimentary parsing for switches after programfile\n"
3299 " -S look for programfile using PATH environment variable\n",
3300 " -t enable tainting warnings\n"
3301 " -T enable tainting checks\n"
3302 " -u dump core after parsing program\n"
3303 " -U allow unsafe operations\n"
3304 " -v print version, patchlevel and license\n"
3305 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3306 " -w enable many useful warnings\n"
3307 " -W enable all warnings\n"
3308 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3309 " -X disable all warnings\n"
3311 "Run 'perldoc perl' for more help with Perl.\n\n",
3314 const char * const *p = usage_msg;
3315 PerlIO *out = PerlIO_stdout();
3318 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3321 PerlIO_puts(out, *p++);
3325 /* convert a string of -D options (or digits) into an int.
3326 * sets *s to point to the char after the options */
3330 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3332 static const char * const usage_msgd[] = {
3333 " Debugging flag values: (see also -d)\n"
3334 " p Tokenizing and parsing (with v, displays parse stack)\n"
3335 " s Stack snapshots (with v, displays all stacks)\n"
3336 " l Context (loop) stack processing\n"
3337 " t Trace execution\n"
3338 " o Method and overloading resolution\n",
3339 " c String/numeric conversions\n"
3340 " P Print profiling info, source file input state\n"
3341 " m Memory and SV allocation\n"
3342 " f Format processing\n"
3343 " r Regular expression parsing and execution\n"
3344 " x Syntax tree dump\n",
3345 " u Tainting checks\n"
3346 " H Hash dump -- usurps values()\n"
3347 " X Scratchpad allocation\n"
3349 " S Op slab allocation\n"
3351 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3352 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3353 " v Verbose: use in conjunction with other flags\n"
3354 " C Copy On Write\n"
3355 " A Consistency checks on internal structures\n"
3356 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3357 " M trace smart match resolution\n"
3358 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3359 " L trace some locale setting information--for Perl core development\n",
3360 " i trace PerlIO layer processing\n",
3365 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3368 /* if adding extra options, remember to update DEBUG_MASK */
3369 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3371 for (; isWORDCHAR(**s); (*s)++) {
3372 const char * const d = strchr(debopts,**s);
3374 uv |= 1 << (d - debopts);
3375 else if (ckWARN_d(WARN_DEBUGGING))
3376 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3377 "invalid option -D%c, use -D'' to see choices\n", **s);
3380 else if (isDIGIT(**s)) {
3381 const char* e = *s + strlen(*s);
3382 if (grok_atoUV(*s, &uv, &e))
3384 for (; isWORDCHAR(**s); (*s)++) ;
3386 else if (givehelp) {
3387 const char *const *p = usage_msgd;
3388 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3390 return (int)uv; /* ignore any UV->int conversion loss */
3394 /* This routine handles any switches that can be given during run */
3397 Perl_moreswitches(pTHX_ const char *s)
3401 const char option = *s; /* used to remember option in -m/-M code */
3403 PERL_ARGS_ASSERT_MORESWITCHES;
3411 SvREFCNT_dec(PL_rs);
3412 if (s[1] == 'x' && s[2]) {
3413 const char *e = s+=2;
3419 flags = PERL_SCAN_SILENT_ILLDIGIT;
3420 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3421 if (s + numlen < e) {
3422 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3426 PL_rs = newSVpvs("");
3427 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3428 uvchr_to_utf8(tmps, rschar);
3429 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3434 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3435 if (rschar & ~((U8)~0))
3436 PL_rs = &PL_sv_undef;
3437 else if (!rschar && numlen >= 2)
3438 PL_rs = newSVpvs("");
3440 char ch = (char)rschar;
3441 PL_rs = newSVpvn(&ch, 1);
3444 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3449 PL_unicode = parse_unicode_opts( (const char **)&s );
3450 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3458 while (*s && !isSPACE(*s)) ++s;
3459 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3471 forbid_setid('d', FALSE);
3474 /* -dt indicates to the debugger that threads will be used */
3475 if (*s == 't' && !isWORDCHAR(s[1])) {
3477 my_setenv("PERL5DB_THREADED", "1");
3480 /* The following permits -d:Mod to accepts arguments following an =
3481 in the fashion that -MSome::Mod does. */
3482 if (*s == ':' || *s == '=') {
3489 sv = newSVpvs("no Devel::");
3491 sv = newSVpvs("use Devel::");
3495 end = s + strlen(s);
3497 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3498 while(isWORDCHAR(*s) || *s==':') ++s;
3500 sv_catpvn(sv, start, end - start);
3502 sv_catpvn(sv, start, s-start);
3503 /* Don't use NUL as q// delimiter here, this string goes in the
3505 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3508 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3512 PL_perldb = PERLDB_ALL;
3519 forbid_setid('D', FALSE);
3521 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3522 #else /* !DEBUGGING */
3523 if (ckWARN_d(WARN_DEBUGGING))
3524 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3525 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3526 for (s++; isWORDCHAR(*s); s++) ;
3529 NOT_REACHED; /* NOTREACHED */
3533 NOT_REACHED; /* NOTREACHED */
3536 Safefree(PL_inplace);
3538 const char * const start = ++s;
3539 while (*s && !isSPACE(*s))
3542 PL_inplace = savepvn(start, s - start);
3545 case 'I': /* -I handled both here and in parse_body() */
3546 forbid_setid('I', FALSE);
3548 while (*s && isSPACE(*s))
3553 /* ignore trailing spaces (possibly followed by other switches) */
3555 for (e = p; *e && !isSPACE(*e); e++) ;
3559 } while (*p && *p != '-');
3561 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3567 Perl_croak(aTHX_ "No directory specified for -I");
3573 SvREFCNT_dec(PL_ors_sv);
3579 PL_ors_sv = newSVpvs("\n");
3580 numlen = 3 + (*s == '0');
3581 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3585 if (RsPARA(PL_rs)) {
3586 PL_ors_sv = newSVpvs("\n\n");
3589 PL_ors_sv = newSVsv(PL_rs);
3594 forbid_setid('M', FALSE); /* XXX ? */
3597 forbid_setid('m', FALSE); /* XXX ? */
3602 const char *use = "use ";
3604 /* -M-foo == 'no foo' */
3605 /* Leading space on " no " is deliberate, to make both
3606 possibilities the same length. */
3607 if (*s == '-') { use = " no "; ++s; }
3608 sv = newSVpvn(use,4);
3610 /* We allow -M'Module qw(Foo Bar)' */
3611 while(isWORDCHAR(*s) || *s==':') {
3620 Perl_croak(aTHX_ "Module name required with -%c option",
3623 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3624 "contains single ':'",
3625 (int)(s - start), start, option);
3626 end = s + strlen(s);
3628 sv_catpvn(sv, start, end - start);
3629 if (option == 'm') {
3631 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3632 sv_catpvs( sv, " ()");
3635 sv_catpvn(sv, start, s-start);
3636 /* Use NUL as q''-delimiter. */
3637 sv_catpvs(sv, " split(/,/,q\0");
3639 sv_catpvn(sv, s, end - s);
3640 sv_catpvs(sv, "\0)");
3643 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3646 Perl_croak(aTHX_ "Missing argument to -%c", option);
3657 forbid_setid('s', FALSE);
3658 PL_doswitches = TRUE;
3663 #if defined(SILENT_NO_TAINT_SUPPORT)
3664 /* silently ignore */
3665 #elif defined(NO_TAINT_SUPPORT)
3666 Perl_croak_nocontext("This perl was compiled without taint support. "
3667 "Cowardly refusing to run with -t or -T flags");
3675 PL_do_undump = TRUE;
3685 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3686 PL_dowarn |= G_WARN_ON;
3691 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3692 if (!specialWARN(PL_compiling.cop_warnings))
3693 PerlMemShared_free(PL_compiling.cop_warnings);
3694 PL_compiling.cop_warnings = pWARN_ALL ;
3698 PL_dowarn = G_WARN_ALL_OFF;
3699 if (!specialWARN(PL_compiling.cop_warnings))
3700 PerlMemShared_free(PL_compiling.cop_warnings);
3701 PL_compiling.cop_warnings = pWARN_NONE ;
3708 if (s[0] == '-') /* Additional switches on #! line. */
3713 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3719 #ifdef ALTERNATE_SHEBANG
3720 case 'S': /* OS/2 needs -S on "extproc" line. */
3723 case 'e': case 'f': case 'x': case 'E':
3724 #ifndef ALTERNATE_SHEBANG
3728 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3731 "Unrecognized switch: -%.1s (-h will show valid options)",s
3741 PerlIO * PIO_stdout;
3743 const char * const level_str = "v" PERL_VERSION_STRING;
3744 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3745 #ifdef PERL_PATCHNUM
3747 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3748 static const char num [] = PERL_PATCHNUM "*";
3750 static const char num [] = PERL_PATCHNUM;
3753 const STRLEN num_len = sizeof(num)-1;
3754 /* A very advanced compiler would fold away the strnEQ
3755 and this whole conditional, but most (all?) won't do it.
3756 SV level could also be replaced by with preprocessor
3759 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3760 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3761 of the interp so it might contain format characters
3763 level = newSVpvn(num, num_len);
3765 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3769 SV* level = newSVpvn(level_str, level_len);
3770 #endif /* #ifdef PERL_PATCHNUM */
3771 PIO_stdout = PerlIO_stdout();
3772 PerlIO_printf(PIO_stdout,
3773 "\nThis is perl " STRINGIFY(PERL_REVISION)
3774 ", version " STRINGIFY(PERL_VERSION)
3775 ", subversion " STRINGIFY(PERL_SUBVERSION)
3776 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3778 SvREFCNT_dec_NN(level);
3780 #if defined(LOCAL_PATCH_COUNT)
3781 if (LOCAL_PATCH_COUNT > 0)
3782 PerlIO_printf(PIO_stdout,
3783 "\n(with %d registered patch%s, "
3784 "see perl -V for more detail)",
3786 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3789 PerlIO_printf(PIO_stdout,
3790 "\n\nCopyright 1987-2019, Larry Wall\n");
3792 PerlIO_printf(PIO_stdout,
3793 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3796 PerlIO_printf(PIO_stdout,
3797 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3798 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3801 PerlIO_printf(PIO_stdout,
3802 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3803 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3806 PerlIO_printf(PIO_stdout,
3807 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3810 PerlIO_printf(PIO_stdout,
3811 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3814 PerlIO_printf(PIO_stdout,
3815 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3817 #ifdef __SYMBIAN32__
3818 PerlIO_printf(PIO_stdout,
3819 "Symbian port by Nokia, 2004-2005\n");
3821 #ifdef BINARY_BUILD_NOTICE
3822 BINARY_BUILD_NOTICE;
3824 PerlIO_printf(PIO_stdout,
3826 Perl may be copied only under the terms of either the Artistic License or the\n\
3827 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3828 Complete documentation for Perl, including FAQ lists, should be found on\n\
3829 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3830 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3834 /* compliments of Tom Christiansen */
3836 /* unexec() can be found in the Gnu emacs distribution */
3837 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3840 #include <lib$routines.h>
3844 Perl_my_unexec(pTHX)
3847 SV * prog = newSVpv(BIN_EXP, 0);
3848 SV * file = newSVpv(PL_origfilename, 0);
3852 sv_catpvs(prog, "/perl");
3853 sv_catpvs(file, ".perldump");
3855 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3856 /* unexec prints msg to stderr in case of failure */
3857 PerlProc_exit(status);
3859 PERL_UNUSED_CONTEXT;
3861 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3862 # elif defined(WIN32) || defined(__CYGWIN__)
3863 Perl_croak_nocontext("dump is not supported");
3865 ABORT(); /* for use with undump */
3870 /* initialize curinterp */
3875 # define PERLVAR(prefix,var,type)
3876 # define PERLVARA(prefix,var,n,type)
3877 # if defined(PERL_IMPLICIT_CONTEXT)
3878 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3879 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3881 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3882 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3884 # include "intrpvar.h"
3890 # define PERLVAR(prefix,var,type)
3891 # define PERLVARA(prefix,var,n,type)
3892 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3893 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3894 # include "intrpvar.h"
3904 S_init_main_stash(pTHX)
3909 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(hv);
3910 /* We know that the string "main" will be in the global shared string
3911 table, so it's a small saving to use it rather than allocate another
3913 PL_curstname = newSVpvs_share("main");
3914 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3915 /* If we hadn't caused another reference to "main" to be in the shared
3916 string table above, then it would be worth reordering these two,
3917 because otherwise all we do is delete "main" from it as a consequence
3918 of the SvREFCNT_dec, only to add it again with hv_name_set */
3919 SvREFCNT_dec(GvHV(gv));
3920 hv_name_sets(PL_defstash, "main", 0);
3921 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3923 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3925 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3926 GvMULTI_on(PL_incgv);
3927 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3928 SvREFCNT_inc_simple_void(PL_hintgv);
3929 GvMULTI_on(PL_hintgv);
3930 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3931 SvREFCNT_inc_simple_void(PL_defgv);
3932 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3933 SvREFCNT_inc_simple_void(PL_errgv);
3934 GvMULTI_on(PL_errgv);
3935 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3936 SvREFCNT_inc_simple_void(PL_replgv);
3937 GvMULTI_on(PL_replgv);
3938 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3939 #ifdef PERL_DONT_CREATE_GVSV
3940 (void)gv_SVadd(PL_errgv);
3942 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3944 CopSTASH_set(&PL_compiling, PL_defstash);
3945 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3946 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3948 /* We must init $/ before switches are processed. */
3949 sv_setpvs(get_sv("/", GV_ADD), "\n");
3953 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3956 PerlIO *rsfp = NULL;
3960 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3963 PL_origfilename = savepvs("-e");
3968 /* if find_script() returns, it returns a malloc()-ed value */
3969 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3970 s = scriptname + strlen(scriptname);
3972 if (strBEGINs(scriptname, "/dev/fd/")
3973 && isDIGIT(scriptname[8])
3974 && grok_atoUV(scriptname + 8, &uv, &s)
3975 && uv <= PERL_INT_MAX
3980 * Tell apart "normal" usage of fdscript, e.g.
3981 * with bash on FreeBSD:
3982 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3983 * from usage in suidperl.
3984 * Does any "normal" usage leave garbage after the number???
3985 * Is it a mistake to use a similar /dev/fd/ construct for
3990 * Be supersafe and do some sanity-checks.
3991 * Still, can we be sure we got the right thing?
3994 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3997 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3999 scriptname = savepv(s + 1);
4000 Safefree(PL_origfilename);
4001 PL_origfilename = (char *)scriptname;
4006 CopFILE_free(PL_curcop);
4007 CopFILE_set(PL_curcop, PL_origfilename);
4008 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
4009 scriptname = (char *)"";
4010 if (fdscript >= 0) {
4011 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
4013 else if (!*scriptname) {
4014 forbid_setid(0, *suidscript);
4018 #ifdef FAKE_BIT_BUCKET
4019 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
4020 * is called) and still have the "-e" work. (Believe it or not,
4021 * a /dev/null is required for the "-e" to work because source
4022 * filter magic is used to implement it. ) This is *not* a general
4023 * replacement for a /dev/null. What we do here is create a temp
4024 * file (an empty file), open up that as the script, and then
4025 * immediately close and unlink it. Close enough for jazz. */
4026 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
4027 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
4028 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
4029 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
4030 FAKE_BIT_BUCKET_TEMPLATE
4032 const char * const err = "Failed to create a fake bit bucket";
4033 if (strEQ(scriptname, BIT_BUCKET)) {
4034 int tmpfd = Perl_my_mkstemp_cloexec(tmpname);
4036 scriptname = tmpname;
4039 Perl_croak(aTHX_ err);
4042 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
4043 #ifdef FAKE_BIT_BUCKET
4044 if ( strBEGINs(scriptname, FAKE_BIT_BUCKET_PREFIX)
4045 && strlen(scriptname) == sizeof(tmpname) - 1)
4049 scriptname = BIT_BUCKET;
4053 /* PSz 16 Sep 03 Keep neat error message */
4055 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
4057 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4058 CopFILE(PL_curcop), Strerror(errno));
4060 fd = PerlIO_fileno(rsfp);
4063 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
4064 && S_ISDIR(tmpstatbuf.st_mode)))
4065 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4072 /* In the days of suidperl, we refused to execute a setuid script stored on
4073 * a filesystem mounted nosuid and/or noexec. This meant that we probed for the
4074 * existence of the appropriate filesystem-statting function, and behaved
4075 * accordingly. But even though suidperl is long gone, we must still include
4076 * those probes for the benefit of modules like Filesys::Df, which expect the
4077 * results of those probes to be stored in %Config; see RT#126368. So mention
4078 * the relevant cpp symbols here, to ensure that metaconfig will include their
4079 * probes in the generated Configure:
4081 * I_SYSSTATVFS HAS_FSTATVFS
4083 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
4084 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
4088 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4089 /* Don't even need this function. */
4092 S_validate_suid(pTHX_ PerlIO *rsfp)
4094 const Uid_t my_uid = PerlProc_getuid();
4095 const Uid_t my_euid = PerlProc_geteuid();
4096 const Gid_t my_gid = PerlProc_getgid();
4097 const Gid_t my_egid = PerlProc_getegid();
4099 PERL_ARGS_ASSERT_VALIDATE_SUID;
4101 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
4103 int fd = PerlIO_fileno(rsfp);
4105 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
4106 Perl_croak_nocontext( "Illegal suidscript");
4108 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
4110 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
4113 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4114 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4115 /* not set-id, must be wrapped */
4118 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4121 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4126 PERL_ARGS_ASSERT_FIND_BEGINNING;
4128 /* skip forward in input to the real script? */
4131 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4132 Perl_croak(aTHX_ "No Perl script found in input\n");
4134 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
4135 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4136 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4138 while (*s == ' ' || *s == '\t') s++;
4140 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4141 || s2[-1] == '_') s2--;
4142 if (strBEGINs(s2-4,"perl"))
4143 while ((s = moreswitches(s)))
4152 /* no need to do anything here any more if we don't
4154 #ifndef NO_TAINT_SUPPORT
4155 const Uid_t my_uid = PerlProc_getuid();
4156 const Uid_t my_euid = PerlProc_geteuid();
4157 const Gid_t my_gid = PerlProc_getgid();
4158 const Gid_t my_egid = PerlProc_getegid();
4160 PERL_UNUSED_CONTEXT;
4162 /* Should not happen: */
4163 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
4164 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
4168 * Should go by suidscript, not uid!=euid: why disallow
4169 * system("ls") in scripts run from setuid things?
4170 * Or, is this run before we check arguments and set suidscript?
4171 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4172 * (We never have suidscript, can we be sure to have fdscript?)
4173 * Or must then go by UID checks? See comments in forbid_setid also.
4177 /* This is used very early in the lifetime of the program,
4178 * before even the options are parsed, so PL_tainting has
4179 * not been initialized properly. */
4181 Perl_doing_taint(int argc, char *argv[], char *envp[])
4183 #ifndef PERL_IMPLICIT_SYS
4184 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4185 * before we have an interpreter-- and the whole point of this
4186 * function is to be called at such an early stage. If you are on
4187 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4188 * "tainted because running with altered effective ids', you'll
4189 * have to add your own checks somewhere in here. The two most
4190 * known samples of 'implicitness' are Win32 and NetWare, neither
4191 * of which has much of concept of 'uids'. */
4192 Uid_t uid = PerlProc_getuid();
4193 Uid_t euid = PerlProc_geteuid();
4194 Gid_t gid = PerlProc_getgid();
4195 Gid_t egid = PerlProc_getegid();
4202 if (uid && (euid != uid || egid != gid))
4204 #endif /* !PERL_IMPLICIT_SYS */
4205 /* This is a really primitive check; environment gets ignored only
4206 * if -T are the first chars together; otherwise one gets
4207 * "Too late" message. */
4208 if ( argc > 1 && argv[1][0] == '-'
4209 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4214 /* Passing the flag as a single char rather than a string is a slight space
4215 optimisation. The only message that isn't /^-.$/ is
4216 "program input from stdin", which is substituted in place of '\0', which
4217 could never be a command line flag. */
4219 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4221 char string[3] = "-x";
4222 const char *message = "program input from stdin";
4224 PERL_UNUSED_CONTEXT;
4230 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4231 if (PerlProc_getuid() != PerlProc_geteuid())
4232 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4233 if (PerlProc_getgid() != PerlProc_getegid())
4234 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4235 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4237 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4241 Perl_init_dbargs(pTHX)
4243 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4248 /* Someone has already created it.
4249 It might have entries, and if we just turn off AvREAL(), they will
4250 "leak" until global destruction. */
4252 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4253 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4255 AvREIFY_only(PL_dbargs);
4259 Perl_init_debugger(pTHX)
4261 HV * const ostash = PL_curstash;
4264 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4266 Perl_init_dbargs(aTHX);
4267 PL_DBgv = MUTABLE_GV(
4268 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4270 PL_DBline = MUTABLE_GV(
4271 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4273 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4274 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4276 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4277 if (!SvIOK(PL_DBsingle))
4278 sv_setiv(PL_DBsingle, 0);
4279 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4280 mg->mg_private = DBVARMG_SINGLE;
4281 SvSETMAGIC(PL_DBsingle);
4283 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4284 if (!SvIOK(PL_DBtrace))
4285 sv_setiv(PL_DBtrace, 0);
4286 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4287 mg->mg_private = DBVARMG_TRACE;
4288 SvSETMAGIC(PL_DBtrace);
4290 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4291 if (!SvIOK(PL_DBsignal))
4292 sv_setiv(PL_DBsignal, 0);
4293 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4294 mg->mg_private = DBVARMG_SIGNAL;
4295 SvSETMAGIC(PL_DBsignal);
4297 SvREFCNT_dec(PL_curstash);
4298 PL_curstash = ostash;
4301 #ifndef STRESS_REALLOC
4302 #define REASONABLE(size) (size)
4303 #define REASONABLE_but_at_least(size,min) (size)
4305 #define REASONABLE(size) (1) /* unreasonable */
4306 #define REASONABLE_but_at_least(size,min) (min)
4310 Perl_init_stacks(pTHX)
4314 /* start with 128-item stack and 8K cxstack */
4315 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4316 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4317 PL_curstackinfo->si_type = PERLSI_MAIN;
4318 #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
4319 PL_curstackinfo->si_stack_hwm = 0;
4321 PL_curstack = PL_curstackinfo->si_stack;
4322 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4324 PL_stack_base = AvARRAY(PL_curstack);
4325 PL_stack_sp = PL_stack_base;
4326 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4328 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4331 PL_tmps_max = REASONABLE(128);
4333 Newx(PL_markstack,REASONABLE(32),I32);
4334 PL_markstack_ptr = PL_markstack;
4335 PL_markstack_max = PL_markstack + REASONABLE(32);
4339 Newx(PL_scopestack,REASONABLE(32),I32);
4341 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4343 PL_scopestack_ix = 0;
4344 PL_scopestack_max = REASONABLE(32);
4346 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4347 Newx(PL_savestack, size, ANY);
4348 PL_savestack_ix = 0;
4349 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4350 PL_savestack_max = size - SS_MAXPUSH;
4358 while (PL_curstackinfo->si_next)
4359 PL_curstackinfo = PL_curstackinfo->si_next;
4360 while (PL_curstackinfo) {
4361 PERL_SI *p = PL_curstackinfo->si_prev;
4362 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4363 Safefree(PL_curstackinfo->si_cxstack);
4364 Safefree(PL_curstackinfo);
4365 PL_curstackinfo = p;
4367 Safefree(PL_tmps_stack);
4368 Safefree(PL_markstack);
4369 Safefree(PL_scopestack);
4371 Safefree(PL_scopestack_name);
4373 Safefree(PL_savestack);
4377 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4379 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4380 AV *const isa = GvAVn(gv);
4383 PERL_ARGS_ASSERT_POPULATE_ISA;
4385 if(AvFILLp(isa) != -1)
4388 /* NOTE: No support for tied ISA */
4390 va_start(args, len);
4392 const char *const parent = va_arg(args, const char*);
4397 parent_len = va_arg(args, size_t);
4399 /* Arguments are supplied with a trailing :: */
4400 assert(parent_len > 2);
4401 assert(parent[parent_len - 1] == ':');
4402 assert(parent[parent_len - 2] == ':');
4403 av_push(isa, newSVpvn(parent, parent_len - 2));
4404 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4411 S_init_predump_symbols(pTHX)
4416 sv_setpvs(get_sv("\"", GV_ADD), " ");
4417 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4420 /* Historically, PVIOs were blessed into IO::Handle, unless
4421 FileHandle was loaded, in which case they were blessed into
4422 that. Action at a distance.
4423 However, if we simply bless into IO::Handle, we break code
4424 that assumes that PVIOs will have (among others) a seek
4425 method. IO::File inherits from IO::Handle and IO::Seekable,
4426 and provides the needed methods. But if we simply bless into
4427 it, then we break code that assumed that by loading
4428 IO::Handle, *it* would work.
4429 So a compromise is to set up the correct @IO::File::ISA,
4430 so that code that does C<use IO::Handle>; will still work.
4433 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4434 STR_WITH_LEN("IO::Handle::"),
4435 STR_WITH_LEN("IO::Seekable::"),
4436 STR_WITH_LEN("Exporter::"),
4439 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4440 GvMULTI_on(PL_stdingv);
4441 io = GvIOp(PL_stdingv);
4442 IoTYPE(io) = IoTYPE_RDONLY;
4443 IoIFP(io) = PerlIO_stdin();
4444 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4446 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4448 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4451 IoTYPE(io) = IoTYPE_WRONLY;
4452 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4454 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4456 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4458 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4459 GvMULTI_on(PL_stderrgv);
4460 io = GvIOp(PL_stderrgv);
4461 IoTYPE(io) = IoTYPE_WRONLY;
4462 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4463 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4465 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4467 PL_statname = newSVpvs(""); /* last filename we did stat on */
4471 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4473 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4475 argc--,argv++; /* skip name of script */
4476 if (PL_doswitches) {
4477 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4481 if (argv[0][1] == '-' && !argv[0][2]) {
4485 if ((s = strchr(argv[0], '='))) {
4486 const char *const start_name = argv[0] + 1;
4487 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4488 TRUE, SVt_PV)), s + 1);
4491 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4494 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4495 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4496 GvMULTI_on(PL_argvgv);
4497 av_clear(GvAVn(PL_argvgv));
4498 for (; argc > 0; argc--,argv++) {
4499 SV * const sv = newSVpv(argv[0],0);
4500 av_push(GvAV(PL_argvgv),sv);
4501 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4502 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4505 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4506 (void)sv_utf8_decode(sv);
4510 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4511 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4512 "-i used with no filenames on the command line, "
4513 "reading from STDIN");
4517 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4524 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4526 PL_toptarget = newSV_type(SVt_PVIV);
4527 SvPVCLEAR(PL_toptarget);
4528 PL_bodytarget = newSV_type(SVt_PVIV);
4529 SvPVCLEAR(PL_bodytarget);
4530 PL_formtarget = PL_bodytarget;
4534 init_argv_symbols(argc,argv);
4536 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4537 sv_setpv(GvSV(tmpgv),PL_origfilename);
4539 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4541 bool env_is_not_environ;
4542 SvREFCNT_inc_simple_void_NN(PL_envgv);
4543 GvMULTI_on(PL_envgv);
4544 hv = GvHVn(PL_envgv);
4545 hv_magic(hv, NULL, PERL_MAGIC_env);
4547 #ifdef USE_ENVIRON_ARRAY
4548 /* Note that if the supplied env parameter is actually a copy
4549 of the global environ then it may now point to free'd memory
4550 if the environment has been modified since. To avoid this
4551 problem we treat env==NULL as meaning 'use the default'
4555 env_is_not_environ = env != environ;
4556 if (env_is_not_environ
4557 # ifdef USE_ITHREADS
4558 && PL_curinterp == aTHX
4570 for (; *env; env++) {
4573 if (!(s = strchr(old_var,'=')) || s == old_var)
4577 #if defined(MSDOS) && !defined(DJGPP)
4579 (void)strupr(old_var);
4582 if (hv_exists(hv, old_var, nlen)) {
4583 const char *name = savepvn(old_var, nlen);
4585 /* make sure we use the same value as getenv(), otherwise code that
4586 uses getenv() (like setlocale()) might see a different value to %ENV
4588 sv = newSVpv(PerlEnv_getenv(name), 0);
4590 /* keep a count of the dups of this name so we can de-dup environ later */
4591 if (hv_exists(dups, name, nlen))
4592 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4594 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4599 sv = newSVpv(s+1, 0);
4601 (void)hv_store(hv, old_var, nlen, sv, 0);
4602 if (env_is_not_environ)
4606 /* environ has some duplicate definitions, remove them */
4609 while ((entry = hv_iternext_flags(dups, 0))) {
4611 const char *name = HePV(entry, nlen);
4612 IV count = SvIV(HeVAL(entry));
4614 SV **valp = hv_fetch(hv, name, nlen, 0);
4618 /* try to remove any duplicate names, depending on the
4619 * implementation used in my_setenv() the iteration might
4620 * not be necessary, but let's be safe.
4622 for (i = 0; i < count; ++i)
4625 /* and set it back to the value we set $ENV{name} to */
4626 my_setenv(name, SvPV_nolen(*valp));
4629 SvREFCNT_dec_NN(dups);
4631 #endif /* USE_ENVIRON_ARRAY */
4632 #endif /* !PERL_MICRO */
4636 /* touch @F array to prevent spurious warnings 20020415 MJD */
4638 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4643 S_init_perllib(pTHX)
4646 const char *perl5lib = NULL;
4649 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4653 if (!TAINTING_get) {
4655 perl5lib = PerlEnv_getenv("PERL5LIB");
4657 * It isn't possible to delete an environment variable with
4658 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4659 * case we treat PERL5LIB as undefined if it has a zero-length value.
4661 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4662 if (perl5lib && *perl5lib != '\0')
4666 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4668 s = PerlEnv_getenv("PERLLIB");
4670 incpush_use_sep(s, 0, 0);
4673 /* Treat PERL5?LIB as a possible search list logical name -- the
4674 * "natural" VMS idiom for a Unix path string. We allow each
4675 * element to be a set of |-separated directories for compatibility.
4679 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4681 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4682 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4684 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4685 incpush_use_sep(buf, 0, 0);
4690 #ifndef PERL_IS_MINIPERL
4691 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4692 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4694 #include "perl_inc_macro.h"
4695 /* Use the ~-expanded versions of APPLLIB (undocumented),
4696 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4699 INCPUSH_SITEARCH_EXP
4701 INCPUSH_PERL_VENDORARCH_EXP
4702 INCPUSH_PERL_VENDORLIB_EXP
4705 INCPUSH_PERL_OTHERLIBDIRS
4707 INCPUSH_APPLLIB_OLD_EXP
4708 INCPUSH_SITELIB_STEM
4709 INCPUSH_PERL_VENDORLIB_STEM
4710 INCPUSH_PERL_OTHERLIBDIRS_ARCHONLY
4712 #endif /* !PERL_IS_MINIPERL */
4714 if (!TAINTING_get) {
4715 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4716 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4717 if (unsafe && strEQ(unsafe, "1"))
4719 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4723 #if defined(DOSISH) || defined(__SYMBIAN32__)
4724 # define PERLLIB_SEP ';'
4725 #elif defined(__VMS)
4726 # define PERLLIB_SEP PL_perllib_sep
4728 # define PERLLIB_SEP ':'
4730 #ifndef PERLLIB_MANGLE
4731 # define PERLLIB_MANGLE(s,n) (s)
4734 #ifndef PERL_IS_MINIPERL
4735 /* Push a directory onto @INC if it exists.
4736 Generate a new SV if we do this, to save needing to copy the SV we push
4739 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4743 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4745 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4746 S_ISDIR(tmpstatbuf.st_mode)) {
4748 dir = newSVsv(stem);
4750 /* Truncate dir back to stem. */
4751 SvCUR_set(dir, SvCUR(stem));
4758 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4760 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4763 PERL_ARGS_ASSERT_MAYBERELOCATE;
4766 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4767 defined to so something (in os2/os2.c), but the code has been
4768 this way, ignoring any possible changed of length, since
4769 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4771 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4777 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4779 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4780 sv_usepvn(libdir,unix,len);
4783 PerlIO_printf(Perl_error_log,
4784 "Failed to unixify @INC element \"%s\"\n",
4785 SvPV_nolen_const(libdir));
4789 /* Do the if() outside the #ifdef to avoid warnings about an unused
4792 #ifdef PERL_RELOCATABLE_INC
4794 * Relocatable include entries are marked with a leading .../
4797 * 0: Remove that leading ".../"
4798 * 1: Remove trailing executable name (anything after the last '/')
4799 * from the perl path to give a perl prefix
4801 * While the @INC element starts "../" and the prefix ends with a real
4802 * directory (ie not . or ..) chop that real directory off the prefix
4803 * and the leading "../" from the @INC element. ie a logical "../"
4805 * Finally concatenate the prefix and the remainder of the @INC element
4806 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4807 * generates /usr/local/lib/perl5
4809 const char *libpath = SvPVX(libdir);
4810 STRLEN libpath_len = SvCUR(libdir);
4811 if (memBEGINs(libpath, libpath_len, ".../")) {
4813 SV * const caret_X = get_sv("\030", 0);
4814 /* Going to use the SV just as a scratch buffer holding a C
4820 /* $^X is *the* source of taint if tainting is on, hence
4821 SvPOK() won't be true. */
4823 assert(SvPOKp(caret_X));
4824 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4826 /* Firstly take off the leading .../
4827 If all else fail we'll do the paths relative to the current
4829 sv_chop(libdir, libpath + 4);
4830 /* Don't use SvPV as we're intentionally bypassing taining,
4831 mortal copies that the mg_get of tainting creates, and
4832 corruption that seems to come via the save stack.
4833 I guess that the save stack isn't correctly set up yet. */
4834 libpath = SvPVX(libdir);
4835 libpath_len = SvCUR(libdir);
4837 prefix = SvPVX(prefix_sv);
4838 lastslash = (char *) my_memrchr(prefix, '/',
4839 SvEND(prefix_sv) - prefix);
4841 /* First time in with the *lastslash = '\0' we just wipe off
4842 the trailing /perl from (say) /usr/foo/bin/perl
4846 while ((*lastslash = '\0'), /* Do that, come what may. */
4847 ( memBEGINs(libpath, libpath_len, "../")
4849 (char *) my_memrchr(prefix, '/',
4850 SvEND(prefix_sv) - prefix))))
4852 if (lastslash[1] == '\0'
4853 || (lastslash[1] == '.'
4854 && (lastslash[2] == '/' /* ends "/." */
4855 || (lastslash[2] == '/'
4856 && lastslash[3] == '/' /* or "/.." */
4858 /* Prefix ends "/" or "/." or "/..", any of which
4859 are fishy, so don't do any more logical cleanup.
4863 /* Remove leading "../" from path */
4866 /* Next iteration round the loop removes the last
4867 directory name from prefix by writing a '\0' in
4868 the while clause. */
4870 /* prefix has been terminated with a '\0' to the correct
4871 length. libpath points somewhere into the libdir SV.
4872 We need to join the 2 with '/' and drop the result into
4874 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4875 SvREFCNT_dec(libdir);
4876 /* And this is the new libdir. */
4879 (PerlProc_getuid() != PerlProc_geteuid() ||
4880 PerlProc_getgid() != PerlProc_getegid())) {
4881 /* Need to taint relocated paths if running set ID */
4882 SvTAINTED_on(libdir);
4885 SvREFCNT_dec(prefix_sv);
4893 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4895 #ifndef PERL_IS_MINIPERL
4896 const U8 using_sub_dirs
4897 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4898 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4899 const U8 add_versioned_sub_dirs
4900 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4901 const U8 add_archonly_sub_dirs
4902 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4903 #ifdef PERL_INC_VERSION_LIST
4904 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4907 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4908 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4909 AV *const inc = GvAVn(PL_incgv);
4911 PERL_ARGS_ASSERT_INCPUSH;
4914 /* Could remove this vestigial extra block, if we don't mind a lot of
4915 re-indenting diff noise. */
4917 SV *const libdir = mayberelocate(dir, len, flags);
4918 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4919 arranged to unshift #! line -I onto the front of @INC. However,
4920 -I can add version and architecture specific libraries, and they
4921 need to go first. The old code assumed that it was always
4922 pushing. Hence to make it work, need to push the architecture
4923 (etc) libraries onto a temporary array, then "unshift" that onto
4924 the front of @INC. */
4925 #ifndef PERL_IS_MINIPERL
4926 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4929 * BEFORE pushing libdir onto @INC we may first push version- and
4930 * archname-specific sub-directories.
4932 if (using_sub_dirs) {
4933 SV *subdir = newSVsv(libdir);
4934 #ifdef PERL_INC_VERSION_LIST
4935 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4936 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4937 const char * const *incver;
4940 if (add_versioned_sub_dirs) {
4941 /* .../version/archname if -d .../version/archname */
4942 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4943 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4945 /* .../version if -d .../version */
4946 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4947 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4950 #ifdef PERL_INC_VERSION_LIST
4952 for (incver = incverlist; *incver; incver++) {
4953 /* .../xxx if -d .../xxx */
4954 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4955 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4960 if (add_archonly_sub_dirs) {
4961 /* .../archname if -d .../archname */
4962 sv_catpvs(subdir, "/" ARCHNAME);
4963 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4967 assert (SvREFCNT(subdir) == 1);
4968 SvREFCNT_dec(subdir);
4970 #endif /* !PERL_IS_MINIPERL */
4971 /* finally add this lib directory at the end of @INC */
4973 #ifdef PERL_IS_MINIPERL
4974 const Size_t extra = 0;
4976 Size_t extra = av_tindex(av) + 1;
4978 av_unshift(inc, extra + push_basedir);
4980 av_store(inc, extra, libdir);
4981 #ifndef PERL_IS_MINIPERL
4983 /* av owns a reference, av_store() expects to be donated a
4984 reference, and av expects to be sane when it's cleared.
4985 If I wanted to be naughty and wrong, I could peek inside the
4986 implementation of av_clear(), realise that it uses
4987 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4988 and so directly steal from it (with a memcpy() to inc, and
4989 then memset() to NULL them out. But people copy code from the
4990 core expecting it to be best practise, so let's use the API.
4991 Although studious readers will note that I'm not checking any
4993 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4998 else if (push_basedir) {
4999 av_push(inc, libdir);
5002 if (!push_basedir) {
5003 assert (SvREFCNT(libdir) == 1);
5004 SvREFCNT_dec(libdir);
5010 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
5014 /* This logic has been broken out from S_incpush(). It may be possible to
5017 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
5019 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
5020 * argument to incpush_use_sep. This allows creation of relocatable
5021 * Perl distributions that patch the binary at install time. Those
5022 * distributions will have to provide their own relocation tools; this
5023 * is not a feature otherwise supported by core Perl.
5025 #ifndef PERL_RELOCATABLE_INCPUSH
5032 /* Break at all separators */
5033 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
5035 /* skip any consecutive separators */
5037 /* Uncomment the next line for PATH semantics */
5038 /* But you'll need to write tests */
5039 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
5041 incpush(p, (STRLEN)(s - p), flags);
5046 incpush(p, (STRLEN)(end - p), flags);
5051 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5054 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5060 PERL_ARGS_ASSERT_CALL_LIST;
5062 while (av_tindex(paramList) >= 0) {
5063 cv = MUTABLE_CV(av_shift(paramList));
5065 if (paramList == PL_beginav) {
5066 /* save PL_beginav for compiler */
5067 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5069 else if (paramList == PL_checkav) {
5070 /* save PL_checkav for compiler */
5071 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5073 else if (paramList == PL_unitcheckav) {
5074 /* save PL_unitcheckav for compiler */
5075 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5085 (void)SvPV_const(atsv, len);
5087 PL_curcop = &PL_compiling;
5088 CopLINE_set(PL_curcop, oldline);
5089 if (paramList == PL_beginav)
5090 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5092 Perl_sv_catpvf(aTHX_ atsv,
5093 "%s failed--call queue aborted",
5094 paramList == PL_checkav ? "CHECK"
5095 : paramList == PL_initav ? "INIT"
5096 : paramList == PL_unitcheckav ? "UNITCHECK"
5098 while (PL_scopestack_ix > oldscope)
5101 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5108 /* my_exit() was called */
5109 while (PL_scopestack_ix > oldscope)
5112 SET_CURSTASH(PL_defstash);
5113 PL_curcop = &PL_compiling;
5114 CopLINE_set(PL_curcop, oldline);
5117 NOT_REACHED; /* NOTREACHED */
5120 PL_curcop = &PL_compiling;
5121 CopLINE_set(PL_curcop, oldline);
5124 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5135 A wrapper for the C library L<exit(3)>, honoring what L<perlapi/PL_exit_flags>
5142 Perl_my_exit(pTHX_ U32 status)
5144 if (PL_exit_flags & PERL_EXIT_ABORT) {
5147 if (PL_exit_flags & PERL_EXIT_WARN) {
5148 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5149 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5150 PL_exit_flags &= ~PERL_EXIT_ABORT;
5160 STATUS_EXIT_SET(status);
5167 Perl_my_failure_exit(pTHX)
5170 /* We have been called to fall on our sword. The desired exit code
5171 * should be already set in STATUS_UNIX, but could be shifted over
5172 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5175 * If an error code has not been set, then force the issue.
5177 if (MY_POSIX_EXIT) {
5179 /* According to the die_exit.t tests, if errno is non-zero */
5180 /* It should be used for the error status. */
5182 if (errno == EVMSERR) {
5183 STATUS_NATIVE = vaxc$errno;
5186 /* According to die_exit.t tests, if the child_exit code is */
5187 /* also zero, then we need to exit with a code of 255 */
5188 if ((errno != 0) && (errno < 256))
5189 STATUS_UNIX_EXIT_SET(errno);
5190 else if (STATUS_UNIX < 255) {
5191 STATUS_UNIX_EXIT_SET(255);
5196 /* The exit code could have been set by $? or vmsish which
5197 * means that it may not have fatal set. So convert
5198 * success/warning codes to fatal with out changing
5199 * the POSIX status code. The severity makes VMS native
5200 * status handling work, while UNIX mode programs use the
5201 * the POSIX exit codes.
5203 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5204 STATUS_NATIVE &= STS$M_COND_ID;
5205 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5209 /* Traditionally Perl on VMS always expects a Fatal Error. */
5210 if (vaxc$errno & 1) {
5212 /* So force success status to failure */
5213 if (STATUS_NATIVE & 1)
5218 STATUS_UNIX = EINTR; /* In case something cares */
5223 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5225 /* Encode the severity code */
5226 severity = STATUS_NATIVE & STS$M_SEVERITY;
5227 STATUS_UNIX = (severity ? severity : 1) << 8;
5229 /* Perl expects this to be a fatal error */
5230 if (severity != STS$K_SEVERE)
5240 STATUS_UNIX_SET(eno);
5242 exitstatus = STATUS_UNIX >> 8;
5243 if (exitstatus & 255)
5244 STATUS_UNIX_SET(exitstatus);
5246 STATUS_UNIX_SET(255);
5249 if (PL_exit_flags & PERL_EXIT_ABORT) {
5252 if (PL_exit_flags & PERL_EXIT_WARN) {
5253 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5254 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5255 PL_exit_flags &= ~PERL_EXIT_ABORT;
5261 S_my_exit_jump(pTHX)
5264 SvREFCNT_dec(PL_e_script);
5268 POPSTACK_TO(PL_mainstack);
5269 if (cxstack_ix >= 0) {
5271 cx_popblock(cxstack);
5279 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5281 const char * const p = SvPVX_const(PL_e_script);
5282 const char * const e = SvEND(PL_e_script);
5283 const char *nl = (char *) memchr(p, '\n', e - p);
5285 PERL_UNUSED_ARG(idx);
5286 PERL_UNUSED_ARG(maxlen);
5288 nl = (nl) ? nl+1 : e;
5290 filter_del(read_e_script);
5293 sv_catpvn(buf_sv, p, nl-p);
5294 sv_chop(PL_e_script, nl);
5298 /* removes boilerplate code at the end of each boot_Module xsub */
5300 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5303 call_list(PL_scopestack_ix, PL_unitcheckav);
5308 * ex: set ts=8 sts=4 sw=4 et: