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. An attempt is made to return
1628 an exit code of the type required by the host operating system, but
1629 because it is constrained to be non-zero, it is not necessarily possible
1630 to indicate every type of exit. It is only reliable on Unix, where a
1631 zero exit code can be augmented with a set bit that will be ignored.
1632 In any case, this function is not the correct place to acquire an exit
1633 code: one should get that from L</perl_destruct>.
1638 #define SET_CURSTASH(newstash) \
1639 if (PL_curstash != newstash) { \
1640 SvREFCNT_dec(PL_curstash); \
1641 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1645 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1652 PERL_ARGS_ASSERT_PERL_PARSE;
1653 #ifndef MULTIPLICITY
1654 PERL_UNUSED_ARG(my_perl);
1656 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1658 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1660 if (s && strEQ(s, "1")) {
1661 const unsigned char *seed= PERL_HASH_SEED;
1662 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1663 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1664 while (seed < seed_end) {
1665 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1667 #ifdef PERL_HASH_RANDOMIZE_KEYS
1668 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1669 PL_HASH_RAND_BITS_ENABLED,
1670 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1672 PerlIO_printf(Perl_debug_log, "\n");
1675 #endif /* #if (defined(USE_HASH_SEED) ... */
1679 struct NameTranslationInfo nti;
1680 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1687 for(i = 0; i != argc; i++)
1689 assert(!argv[argc]);
1694 if (PL_origalen != 0) {
1695 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1698 /* Set PL_origalen be the sum of the contiguous argv[]
1699 * elements plus the size of the env in case that it is
1700 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1701 * as the maximum modifiable length of $0. In the worst case
1702 * the area we are able to modify is limited to the size of
1703 * the original argv[0]. (See below for 'contiguous', though.)
1705 const char *s = NULL;
1706 const UV mask = ~(UV)(PTRSIZE-1);
1707 /* Do the mask check only if the args seem like aligned. */
1709 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1711 /* See if all the arguments are contiguous in memory. Note
1712 * that 'contiguous' is a loose term because some platforms
1713 * align the argv[] and the envp[]. If the arguments look
1714 * like non-aligned, assume that they are 'strictly' or
1715 * 'traditionally' contiguous. If the arguments look like
1716 * aligned, we just check that they are within aligned
1717 * PTRSIZE bytes. As long as no system has something bizarre
1718 * like the argv[] interleaved with some other data, we are
1719 * fine. (Did I just evoke Murphy's Law?) --jhi */
1720 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1723 for (i = 1; i < PL_origargc; i++) {
1724 if ((PL_origargv[i] == s + 1
1726 || PL_origargv[i] == s + 2
1731 (PL_origargv[i] > s &&
1733 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1744 #ifndef PERL_USE_SAFE_PUTENV
1745 /* Can we grab env area too to be used as the area for $0? */
1746 if (s && PL_origenviron && !PL_use_safe_putenv) {
1747 if ((PL_origenviron[0] == s + 1)
1750 (PL_origenviron[0] > s &&
1751 PL_origenviron[0] <=
1752 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1756 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1757 s = PL_origenviron[0];
1760 my_setenv("NoNe SuCh", NULL);
1761 /* Force copy of environment. */
1762 for (i = 1; PL_origenviron[i]; i++) {
1763 if (PL_origenviron[i] == s + 1
1766 (PL_origenviron[i] > s &&
1767 PL_origenviron[i] <=
1768 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1771 s = PL_origenviron[i];
1779 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1781 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1786 /* Come here if running an undumped a.out. */
1788 PL_origfilename = savepv(argv[0]);
1789 PL_do_undump = FALSE;
1790 cxstack_ix = -1; /* start label stack again */
1792 assert (!TAINT_get);
1796 init_postdump_symbols(argc,argv,env);
1801 op_free(PL_main_root);
1802 PL_main_root = NULL;
1804 PL_main_start = NULL;
1805 SvREFCNT_dec(PL_main_cv);
1809 oldscope = PL_scopestack_ix;
1810 PL_dowarn = G_WARN_OFF;
1815 parse_body(env,xsinit);
1816 if (PL_unitcheckav) {
1817 call_list(oldscope, PL_unitcheckav);
1820 PERL_SET_PHASE(PERL_PHASE_CHECK);
1821 call_list(oldscope, PL_checkav);
1829 /* my_exit() was called */
1830 while (PL_scopestack_ix > oldscope)
1833 SET_CURSTASH(PL_defstash);
1834 if (PL_unitcheckav) {
1835 call_list(oldscope, PL_unitcheckav);
1838 PERL_SET_PHASE(PERL_PHASE_CHECK);
1839 call_list(oldscope, PL_checkav);
1842 if (ret == 0) ret = 0x100;
1845 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1853 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1854 miniperl, and we need to see those flags reflected in the values here. */
1856 /* What this returns is subject to change. Use the public interface in Config.
1859 S_Internals_V(pTHX_ CV *cv)
1862 #ifdef LOCAL_PATCH_COUNT
1863 const int local_patch_count = LOCAL_PATCH_COUNT;
1865 const int local_patch_count = 0;
1867 const int entries = 3 + local_patch_count;
1869 static const char non_bincompat_options[] =
1876 # ifdef NO_HASH_SEED
1879 # ifdef NO_TAINT_SUPPORT
1882 # ifdef PERL_BOOL_AS_CHAR
1883 " PERL_BOOL_AS_CHAR"
1885 # ifdef PERL_COPY_ON_WRITE
1886 " PERL_COPY_ON_WRITE"
1888 # ifdef PERL_DISABLE_PMC
1891 # ifdef PERL_DONT_CREATE_GVSV
1892 " PERL_DONT_CREATE_GVSV"
1894 # ifdef PERL_EXTERNAL_GLOB
1895 " PERL_EXTERNAL_GLOB"
1897 # ifdef PERL_HASH_FUNC_SIPHASH
1898 " PERL_HASH_FUNC_SIPHASH"
1900 # ifdef PERL_HASH_FUNC_SDBM
1901 " PERL_HASH_FUNC_SDBM"
1903 # ifdef PERL_HASH_FUNC_DJB2
1904 " PERL_HASH_FUNC_DJB2"
1906 # ifdef PERL_HASH_FUNC_SUPERFAST
1907 " PERL_HASH_FUNC_SUPERFAST"
1909 # ifdef PERL_HASH_FUNC_MURMUR3
1910 " PERL_HASH_FUNC_MURMUR3"
1912 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1913 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1915 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1916 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1918 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1919 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1921 # ifdef PERL_IS_MINIPERL
1924 # ifdef PERL_MALLOC_WRAP
1927 # ifdef PERL_MEM_LOG
1930 # ifdef PERL_MEM_LOG_NOIMPL
1931 " PERL_MEM_LOG_NOIMPL"
1933 # ifdef PERL_OP_PARENT
1936 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1937 " PERL_PERTURB_KEYS_DETERMINISTIC"
1939 # ifdef PERL_PERTURB_KEYS_DISABLED
1940 " PERL_PERTURB_KEYS_DISABLED"
1942 # ifdef PERL_PERTURB_KEYS_RANDOM
1943 " PERL_PERTURB_KEYS_RANDOM"
1945 # ifdef PERL_PRESERVE_IVUV
1946 " PERL_PRESERVE_IVUV"
1948 # ifdef PERL_RELOCATABLE_INCPUSH
1949 " PERL_RELOCATABLE_INCPUSH"
1951 # ifdef PERL_USE_DEVEL
1954 # ifdef PERL_USE_SAFE_PUTENV
1955 " PERL_USE_SAFE_PUTENV"
1957 # ifdef SILENT_NO_TAINT_SUPPORT
1958 " SILENT_NO_TAINT_SUPPORT"
1960 # ifdef UNLINK_ALL_VERSIONS
1961 " UNLINK_ALL_VERSIONS"
1963 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1964 " USE_ATTRIBUTES_FOR_PERLIO"
1966 # ifdef USE_FAST_STDIO
1972 # ifdef USE_LOCALE_CTYPE
1975 # ifdef WIN32_NO_REGISTRY
1978 # ifdef USE_PERL_ATOF
1981 # ifdef USE_SITECUSTOMIZE
1982 " USE_SITECUSTOMIZE"
1984 # ifdef USE_THREAD_SAFE_LOCALE
1985 " USE_THREAD_SAFE_LOCALE"
1988 PERL_UNUSED_ARG(cv);
1989 PERL_UNUSED_VAR(items);
1991 EXTEND(SP, entries);
1993 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1994 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1995 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1997 #ifndef PERL_BUILD_DATE
2000 # define PERL_BUILD_DATE __DATE__ " " __TIME__
2002 # define PERL_BUILD_DATE __DATE__
2007 #ifdef PERL_BUILD_DATE
2008 PUSHs(Perl_newSVpvn_flags(aTHX_
2009 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
2012 PUSHs(&PL_sv_undef);
2015 for (i = 1; i <= local_patch_count; i++) {
2016 /* This will be an undef, if PL_localpatches[i] is NULL. */
2017 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
2023 #define INCPUSH_UNSHIFT 0x01
2024 #define INCPUSH_ADD_OLD_VERS 0x02
2025 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
2026 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
2027 #define INCPUSH_NOT_BASEDIR 0x10
2028 #define INCPUSH_CAN_RELOCATE 0x20
2029 #define INCPUSH_ADD_SUB_DIRS \
2030 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
2033 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
2037 int argc = PL_origargc;
2038 char **argv = PL_origargv;
2039 const char *scriptname = NULL;
2040 bool dosearch = FALSE;
2042 bool doextract = FALSE;
2043 const char *cddir = NULL;
2044 #ifdef USE_SITECUSTOMIZE
2045 bool minus_f = FALSE;
2047 SV *linestr_sv = NULL;
2048 bool add_read_e_script = FALSE;
2049 U32 lex_start_flags = 0;
2051 PERL_SET_PHASE(PERL_PHASE_START);
2057 for (argc--,argv++; argc > 0; argc--,argv++) {
2058 if (argv[0][0] != '-' || !argv[0][1])
2064 #ifndef PERL_STRICT_CR
2088 if ((s = moreswitches(s)))
2093 #if defined(SILENT_NO_TAINT_SUPPORT)
2094 /* silently ignore */
2095 #elif defined(NO_TAINT_SUPPORT)
2096 Perl_croak_nocontext("This perl was compiled without taint support. "
2097 "Cowardly refusing to run with -t or -T flags");
2099 CHECK_MALLOC_TOO_LATE_FOR('t');
2100 if( !TAINTING_get ) {
2101 TAINT_WARN_set(TRUE);
2108 #if defined(SILENT_NO_TAINT_SUPPORT)
2109 /* silently ignore */
2110 #elif defined(NO_TAINT_SUPPORT)
2111 Perl_croak_nocontext("This perl was compiled without taint support. "
2112 "Cowardly refusing to run with -t or -T flags");
2114 CHECK_MALLOC_TOO_LATE_FOR('T');
2116 TAINT_WARN_set(FALSE);
2125 forbid_setid('e', FALSE);
2127 PL_e_script = newSVpvs("");
2128 add_read_e_script = TRUE;
2131 sv_catpv(PL_e_script, s);
2133 sv_catpv(PL_e_script, argv[1]);
2137 Perl_croak(aTHX_ "No code specified for -%c", c);
2138 sv_catpvs(PL_e_script, "\n");
2142 #ifdef USE_SITECUSTOMIZE
2148 case 'I': /* -I handled both here and in moreswitches() */
2149 forbid_setid('I', FALSE);
2150 if (!*++s && (s=argv[1]) != NULL) {
2154 STRLEN len = strlen(s);
2155 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2158 Perl_croak(aTHX_ "No directory specified for -I");
2161 forbid_setid('S', FALSE);
2170 opts_prog = newSVpvs("use Config; Config::_V()");
2174 opts_prog = Perl_newSVpvf(aTHX_
2175 "use Config; Config::config_vars(qw%c%s%c)",
2179 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2180 /* don't look for script or read stdin */
2181 scriptname = BIT_BUCKET;
2193 if (!*++s || isSPACE(*s)) {
2197 /* catch use of gnu style long options.
2198 Both of these exit immediately. */
2199 if (strEQ(s, "version"))
2201 if (strEQ(s, "help"))
2206 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2217 #ifndef SECURE_INTERNAL_GETENV
2220 (s = PerlEnv_getenv("PERL5OPT")))
2222 /* s points to static memory in getenv(), which may be overwritten at
2223 * any time; use a mortal copy instead */
2224 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2228 if (*s == '-' && *(s+1) == 'T') {
2229 #if defined(SILENT_NO_TAINT_SUPPORT)
2230 /* silently ignore */
2231 #elif defined(NO_TAINT_SUPPORT)
2232 Perl_croak_nocontext("This perl was compiled without taint support. "
2233 "Cowardly refusing to run with -t or -T flags");
2235 CHECK_MALLOC_TOO_LATE_FOR('T');
2237 TAINT_WARN_set(FALSE);
2241 char *popt_copy = NULL;
2254 if (!strchr("CDIMUdmtwW", *s))
2255 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2259 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2260 s = popt_copy + (s - d);
2268 #if defined(SILENT_NO_TAINT_SUPPORT)
2269 /* silently ignore */
2270 #elif defined(NO_TAINT_SUPPORT)
2271 Perl_croak_nocontext("This perl was compiled without taint support. "
2272 "Cowardly refusing to run with -t or -T flags");
2274 if( !TAINTING_get) {
2275 TAINT_WARN_set(TRUE);
2287 #ifndef NO_PERL_INTERNAL_RAND_SEED
2288 /* If we're not set[ug]id, we might have honored
2289 PERL_INTERNAL_RAND_SEED in perl_construct().
2290 At this point command-line options have been parsed, so if
2291 we're now tainting and not set[ug]id re-seed.
2292 This could possibly be wasteful if PERL_INTERNAL_RAND_SEED is invalid,
2293 but avoids duplicating the logic from perl_construct().
2296 PerlProc_getuid() == PerlProc_geteuid() &&
2297 PerlProc_getgid() == PerlProc_getegid()) {
2298 Perl_drand48_init_r(&PL_internal_random_state, seed());
2302 /* Set $^X early so that it can be used for relocatable paths in @INC */
2303 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2304 assert (!TAINT_get);
2309 #if defined(USE_SITECUSTOMIZE)
2311 /* The games with local $! are to avoid setting errno if there is no
2312 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2313 ie a q() operator with a NUL byte as a the delimiter. This avoids
2314 problems with pathnames containing (say) ' */
2315 # ifdef PERL_IS_MINIPERL
2316 AV *const inc = GvAV(PL_incgv);
2317 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2320 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2321 it should be reported immediately as a build failure. */
2322 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2324 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2325 "do {local $!; -f $f }"
2326 " and do $f || die $@ || qq '$f: $!' }",
2327 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2330 /* SITELIB_EXP is a function call on Win32. */
2331 const char *const raw_sitelib = SITELIB_EXP;
2333 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2334 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2335 INCPUSH_CAN_RELOCATE);
2336 const char *const sitelib = SvPVX(sitelib_sv);
2337 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2339 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2340 0, SVfARG(sitelib), 0,
2341 0, SVfARG(sitelib), 0));
2342 assert (SvREFCNT(sitelib_sv) == 1);
2343 SvREFCNT_dec(sitelib_sv);
2350 scriptname = argv[0];
2353 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2355 else if (scriptname == NULL) {
2357 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2363 assert (!TAINT_get);
2367 bool suidscript = FALSE;
2369 rsfp = open_script(scriptname, dosearch, &suidscript);
2371 rsfp = PerlIO_stdin();
2372 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2375 validate_suid(rsfp);
2378 # if defined(SIGCHLD) || defined(SIGCLD)
2381 # define SIGCHLD SIGCLD
2383 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2384 if (sigstate == (Sighandler_t) SIG_IGN) {
2385 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2386 "Can't ignore signal CHLD, forcing to default");
2387 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2395 /* This will croak if suidscript is true, as -x cannot be used with
2397 forbid_setid('x', suidscript);
2398 /* Hence you can't get here if suidscript is true */
2400 linestr_sv = newSV_type(SVt_PV);
2401 lex_start_flags |= LEX_START_COPIED;
2402 find_beginning(linestr_sv, rsfp);
2403 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2404 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2408 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2409 CvUNIQUE_on(PL_compcv);
2411 CvPADLIST_set(PL_compcv, pad_new(0));
2413 PL_isarev = newHV();
2416 boot_core_UNIVERSAL();
2418 newXS("Internals::V", S_Internals_V, __FILE__);
2421 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2423 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2429 # ifdef HAS_SOCKS5_INIT
2430 socks5_init(argv[0]);
2436 init_predump_symbols();
2437 /* init_postdump_symbols not currently designed to be called */
2438 /* more than once (ENV isn't cleared first, for example) */
2439 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2441 init_postdump_symbols(argc,argv,env);
2443 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2444 * or explicitly in some platforms.
2445 * PL_utf8locale is conditionally turned on by
2446 * locale.c:Perl_init_i18nl10n() if the environment
2447 * look like the user wants to use UTF-8. */
2448 #if defined(__SYMBIAN32__)
2449 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2451 # ifndef PERL_IS_MINIPERL
2453 /* Requires init_predump_symbols(). */
2454 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2459 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2460 * and the default open disciplines. */
2461 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2462 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2464 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2465 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2466 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2468 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2469 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2470 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2472 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2473 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2474 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2476 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2477 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2480 sv_setpvs(sv, ":utf8\0:utf8");
2482 sv_setpvs(sv, ":utf8\0");
2485 sv_setpvs(sv, "\0:utf8");
2494 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2495 if (strEQ(s, "unsafe"))
2496 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2497 else if (strEQ(s, "safe"))
2498 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2500 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2505 lex_start(linestr_sv, rsfp, lex_start_flags);
2506 SvREFCNT_dec(linestr_sv);
2508 PL_subname = newSVpvs("main");
2510 if (add_read_e_script)
2511 filter_add(read_e_script, NULL);
2513 /* now parse the script */
2515 SETERRNO(0,SS_NORMAL);
2516 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2517 abort_execution("", PL_origfilename);
2519 CopLINE_set(PL_curcop, 0);
2520 SET_CURSTASH(PL_defstash);
2522 SvREFCNT_dec(PL_e_script);
2530 SAVECOPFILE(PL_curcop);
2531 SAVECOPLINE(PL_curcop);
2532 gv_check(PL_defstash);
2542 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2543 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2544 dump_mstats("after compilation:");
2549 PL_restartjmpenv = NULL;
2555 =for apidoc perl_run
2557 Tells a Perl interpreter to run its main program. See L<perlembed>
2560 C<my_perl> points to the Perl interpreter. It must have been previously
2561 created through the use of L</perl_alloc> and L</perl_construct>, and
2562 initialised through L</perl_parse>. This function should not be called
2563 if L</perl_parse> returned a non-zero value, indicating a failure in
2564 initialisation or compilation.
2566 This function executes code in C<INIT> blocks, and then executes the
2567 main program. The code to be executed is that established by the prior
2568 call to L</perl_parse>. If the interpreter's C<PL_exit_flags> word
2569 does not have the C<PERL_EXIT_DESTRUCT_END> flag set, then this function
2570 will also execute code in C<END> blocks. If it is desired to make any
2571 further use of the interpreter after calling this function, then C<END>
2572 blocks should be postponed to L</perl_destruct> time by setting that flag.
2574 Returns an integer of slightly tricky interpretation. The correct use
2575 of the return value is as a truth value indicating whether the program
2576 terminated non-locally. If zero is returned, this indicates that
2577 the program ran to completion, and it is safe to make other use of the
2578 interpreter (provided that the C<PERL_EXIT_DESTRUCT_END> flag was set as
2579 described above). If a non-zero value is returned, this indicates that
2580 the interpreter wants to terminate early. The interpreter should not be
2581 just abandoned because of this desire to terminate; the caller should
2582 proceed to shut the interpreter down cleanly with L</perl_destruct>
2583 and free it with L</perl_free>.
2585 For historical reasons, the non-zero return value also attempts to
2586 be a suitable value to pass to the C library function C<exit> (or to
2587 return from C<main>), to serve as an exit code indicating the nature of
2588 the way the program terminated. However, this isn't portable, due to
2589 differing exit code conventions. An attempt is made to return an exit
2590 code of the type required by the host operating system, but because
2591 it is constrained to be non-zero, it is not necessarily possible to
2592 indicate every type of exit. It is only reliable on Unix, where a zero
2593 exit code can be augmented with a set bit that will be ignored. In any
2594 case, this function is not the correct place to acquire an exit code:
2595 one should get that from L</perl_destruct>.
2607 PERL_ARGS_ASSERT_PERL_RUN;
2608 #ifndef MULTIPLICITY
2609 PERL_UNUSED_ARG(my_perl);
2612 oldscope = PL_scopestack_ix;
2620 cxstack_ix = -1; /* start context stack again */
2622 case 0: /* normal completion */
2626 case 2: /* my_exit() */
2627 while (PL_scopestack_ix > oldscope)
2630 SET_CURSTASH(PL_defstash);
2631 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2632 PL_endav && !PL_minus_c) {
2633 PERL_SET_PHASE(PERL_PHASE_END);
2634 call_list(oldscope, PL_endav);
2637 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2638 dump_mstats("after execution: ");
2644 POPSTACK_TO(PL_mainstack);
2647 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2658 S_run_body(pTHX_ I32 oldscope)
2660 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2661 PL_sawampersand ? "Enabling" : "Omitting",
2662 (unsigned int)(PL_sawampersand)));
2664 if (!PL_restartop) {
2666 if (DEBUG_x_TEST || DEBUG_B_TEST)
2667 dump_all_perl(!DEBUG_B_TEST);
2669 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2673 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2676 if (PERLDB_SINGLE && PL_DBsingle)
2679 PERL_SET_PHASE(PERL_PHASE_INIT);
2680 call_list(oldscope, PL_initav);
2682 #ifdef PERL_DEBUG_READONLY_OPS
2683 if (PL_main_root && PL_main_root->op_slabbed)
2684 Slab_to_ro(OpSLAB(PL_main_root));
2690 PERL_SET_PHASE(PERL_PHASE_RUN);
2693 PL_restartjmpenv = NULL;
2694 PL_op = PL_restartop;
2698 else if (PL_main_start) {
2699 CvDEPTH(PL_main_cv) = 1;
2700 PL_op = PL_main_start;
2704 NOT_REACHED; /* NOTREACHED */
2708 =head1 SV Manipulation Functions
2712 Returns the SV of the specified Perl scalar. C<flags> are passed to
2713 C<gv_fetchpv>. If C<GV_ADD> is set and the
2714 Perl variable does not exist then it will be created. If C<flags> is zero
2715 and the variable does not exist then NULL is returned.
2721 Perl_get_sv(pTHX_ const char *name, I32 flags)
2725 PERL_ARGS_ASSERT_GET_SV;
2727 gv = gv_fetchpv(name, flags, SVt_PV);
2734 =head1 Array Manipulation Functions
2738 Returns the AV of the specified Perl global or package array with the given
2739 name (so it won't work on lexical variables). C<flags> are passed
2740 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2741 Perl variable does not exist then it will be created. If C<flags> is zero
2742 and the variable does not exist then NULL is returned.
2744 Perl equivalent: C<@{"$name"}>.
2750 Perl_get_av(pTHX_ const char *name, I32 flags)
2752 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2754 PERL_ARGS_ASSERT_GET_AV;
2764 =head1 Hash Manipulation Functions
2768 Returns the HV of the specified Perl hash. C<flags> are passed to
2769 C<gv_fetchpv>. If C<GV_ADD> is set and the
2770 Perl variable does not exist then it will be created. If C<flags> is zero
2771 and the variable does not exist then C<NULL> is returned.
2777 Perl_get_hv(pTHX_ const char *name, I32 flags)
2779 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2781 PERL_ARGS_ASSERT_GET_HV;
2791 =head1 CV Manipulation Functions
2793 =for apidoc get_cvn_flags
2795 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2796 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2797 exist then it will be declared (which has the same effect as saying
2798 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2799 then NULL is returned.
2803 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2809 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2811 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2813 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2815 if (gv && UNLIKELY(SvROK(gv)) && SvTYPE(SvRV((SV *)gv)) == SVt_PVCV)
2816 return (CV*)SvRV((SV *)gv);
2818 /* XXX this is probably not what they think they're getting.
2819 * It has the same effect as "sub name;", i.e. just a forward
2821 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2822 return newSTUB(gv,0);
2829 /* Nothing in core calls this now, but we can't replace it with a macro and
2830 move it to mathoms.c as a macro would evaluate name twice. */
2832 Perl_get_cv(pTHX_ const char *name, I32 flags)
2834 PERL_ARGS_ASSERT_GET_CV;
2836 return get_cvn_flags(name, strlen(name), flags);
2839 /* Be sure to refetch the stack pointer after calling these routines. */
2843 =head1 Callback Functions
2845 =for apidoc call_argv
2847 Performs a callback to the specified named and package-scoped Perl subroutine
2848 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2851 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2857 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2859 /* See G_* flags in cop.h */
2860 /* null terminated arg list */
2864 PERL_ARGS_ASSERT_CALL_ARGV;
2868 mXPUSHs(newSVpv(*argv,0));
2872 return call_pv(sub_name, flags);
2878 Performs a callback to the specified Perl sub. See L<perlcall>.
2884 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2885 /* name of the subroutine */
2886 /* See G_* flags in cop.h */
2888 PERL_ARGS_ASSERT_CALL_PV;
2890 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2894 =for apidoc call_method
2896 Performs a callback to the specified Perl method. The blessed object must
2897 be on the stack. See L<perlcall>.
2903 Perl_call_method(pTHX_ const char *methname, I32 flags)
2904 /* name of the subroutine */
2905 /* See G_* flags in cop.h */
2909 PERL_ARGS_ASSERT_CALL_METHOD;
2911 len = strlen(methname);
2912 sv = flags & G_METHOD_NAMED
2913 ? sv_2mortal(newSVpvn_share(methname, len,0))
2914 : newSVpvn_flags(methname, len, SVs_TEMP);
2916 return call_sv(sv, flags | G_METHOD);
2919 /* May be called with any of a CV, a GV, or an SV containing the name. */
2923 Performs a callback to the Perl sub specified by the SV.
2925 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2926 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2927 or C<SvPV(sv)> will be used as the name of the sub to call.
2929 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2930 C<SvPV(sv)> will be used as the name of the method to call.
2932 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2933 the name of the method to call.
2935 Some other values are treated specially for internal use and should
2944 Perl_call_sv(pTHX_ SV *sv, volatile I32 flags)
2945 /* See G_* flags in cop.h */
2948 LOGOP myop; /* fake syntax tree node */
2951 volatile I32 retval = 0;
2952 bool oldcatch = CATCH_GET;
2954 OP* const oldop = PL_op;
2957 PERL_ARGS_ASSERT_CALL_SV;
2959 if (flags & G_DISCARD) {
2963 if (!(flags & G_WANT)) {
2964 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2969 Zero(&myop, 1, LOGOP);
2970 if (!(flags & G_NOARGS))
2971 myop.op_flags |= OPf_STACKED;
2972 myop.op_flags |= OP_GIMME_REVERSE(flags);
2976 if (!(flags & G_METHOD_NAMED)) {
2984 if (PERLDB_SUB && PL_curstash != PL_debstash
2985 /* Handle first BEGIN of -d. */
2986 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2987 /* Try harder, since this may have been a sighandler, thus
2988 * curstash may be meaningless. */
2989 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2990 && !(flags & G_NODEBUG))
2991 myop.op_private |= OPpENTERSUB_DB;
2993 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2994 Zero(&method_op, 1, METHOP);
2995 method_op.op_next = (OP*)&myop;
2996 PL_op = (OP*)&method_op;
2997 if ( flags & G_METHOD_NAMED ) {
2998 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2999 method_op.op_type = OP_METHOD_NAMED;
3000 method_op.op_u.op_meth_sv = sv;
3002 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
3003 method_op.op_type = OP_METHOD;
3005 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
3006 myop.op_type = OP_ENTERSUB;
3009 if (!(flags & G_EVAL)) {
3011 CALL_BODY_SUB((OP*)&myop);
3012 retval = PL_stack_sp - (PL_stack_base + oldmark);
3013 CATCH_SET(oldcatch);
3017 myop.op_other = (OP*)&myop;
3019 old_cxix = cxstack_ix;
3020 create_eval_scope(NULL, flags|G_FAKINGEVAL);
3028 CALL_BODY_SUB((OP*)&myop);
3029 retval = PL_stack_sp - (PL_stack_base + oldmark);
3030 if (!(flags & G_KEEPERR)) {
3038 /* my_exit() was called */
3039 SET_CURSTASH(PL_defstash);
3043 NOT_REACHED; /* NOTREACHED */
3046 PL_restartjmpenv = NULL;
3047 PL_op = PL_restartop;
3051 PL_stack_sp = PL_stack_base + oldmark;
3052 if ((flags & G_WANT) == G_ARRAY)
3056 *++PL_stack_sp = &PL_sv_undef;
3061 /* if we croaked, depending on how we croaked the eval scope
3062 * may or may not have already been popped */
3063 if (cxstack_ix > old_cxix) {
3064 assert(cxstack_ix == old_cxix + 1);
3065 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
3066 delete_eval_scope();
3071 if (flags & G_DISCARD) {
3072 PL_stack_sp = PL_stack_base + oldmark;
3081 /* Eval a string. The G_EVAL flag is always assumed. */
3086 Tells Perl to C<eval> the string in the SV. It supports the same flags
3087 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
3089 The C<G_RETHROW> flag can be used if you only need eval_sv() to
3090 execute code specified by a string, but not catch any errors.
3096 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
3098 /* See G_* flags in cop.h */
3101 UNOP myop; /* fake syntax tree node */
3102 volatile I32 oldmark;
3103 volatile I32 retval = 0;
3105 OP* const oldop = PL_op;
3108 PERL_ARGS_ASSERT_EVAL_SV;
3110 if (flags & G_DISCARD) {
3117 Zero(&myop, 1, UNOP);
3120 oldmark = SP - PL_stack_base;
3126 if (!(flags & G_NOARGS))
3127 myop.op_flags = OPf_STACKED;
3128 myop.op_type = OP_ENTEREVAL;
3129 myop.op_flags |= OP_GIMME_REVERSE(flags);
3130 if (flags & G_KEEPERR)
3131 myop.op_flags |= OPf_SPECIAL;
3133 if (flags & G_RE_REPARSING)
3134 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
3136 /* fail now; otherwise we could fail after the JMPENV_PUSH but
3137 * before a cx_pusheval(), which corrupts the stack after a croak */
3138 TAINT_PROPER("eval_sv()");
3144 if (PL_op == (OP*)(&myop)) {
3145 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
3147 goto fail; /* failed in compilation */
3150 retval = PL_stack_sp - (PL_stack_base + oldmark);
3151 if (!(flags & G_KEEPERR)) {
3159 /* my_exit() was called */
3160 SET_CURSTASH(PL_defstash);
3164 NOT_REACHED; /* NOTREACHED */
3167 PL_restartjmpenv = NULL;
3168 PL_op = PL_restartop;
3173 if (flags & G_RETHROW) {
3178 PL_stack_sp = PL_stack_base + oldmark;
3179 if ((flags & G_WANT) == G_ARRAY)
3183 *++PL_stack_sp = &PL_sv_undef;
3189 if (flags & G_DISCARD) {
3190 PL_stack_sp = PL_stack_base + oldmark;
3202 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3208 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3210 SV* sv = newSVpv(p, 0);
3212 PERL_ARGS_ASSERT_EVAL_PV;
3214 if (croak_on_error) {
3216 eval_sv(sv, G_SCALAR | G_RETHROW);
3219 eval_sv(sv, G_SCALAR);
3232 /* Require a module. */
3235 =head1 Embedding Functions
3237 =for apidoc require_pv
3239 Tells Perl to C<require> the file named by the string argument. It is
3240 analogous to the Perl code C<eval "require '$file'">. It's even
3241 implemented that way; consider using load_module instead.
3246 Perl_require_pv(pTHX_ const char *pv)
3251 PERL_ARGS_ASSERT_REQUIRE_PV;
3253 PUSHSTACKi(PERLSI_REQUIRE);
3254 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3255 eval_sv(sv_2mortal(sv), G_DISCARD);
3260 S_usage(pTHX) /* XXX move this out into a module ? */
3262 /* This message really ought to be max 23 lines.
3263 * Removed -h because the user already knows that option. Others? */
3265 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3266 minimum of 509 character string literals. */
3267 static const char * const usage_msg[] = {
3268 " -0[octal] specify record separator (\\0, if no argument)\n"
3269 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3270 " -C[number/list] enables the listed Unicode features\n"
3271 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3272 " -d[:debugger] run program under debugger\n"
3273 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3274 " -e program one line of program (several -e's allowed, omit programfile)\n"
3275 " -E program like -e, but enables all optional features\n"
3276 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3277 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3278 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3279 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3280 " -l[octal] enable line ending processing, specifies line terminator\n"
3281 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3282 " -n assume \"while (<>) { ... }\" loop around program\n"
3283 " -p assume loop like -n but print line also, like sed\n"
3284 " -s enable rudimentary parsing for switches after programfile\n"
3285 " -S look for programfile using PATH environment variable\n",
3286 " -t enable tainting warnings\n"
3287 " -T enable tainting checks\n"
3288 " -u dump core after parsing program\n"
3289 " -U allow unsafe operations\n"
3290 " -v print version, patchlevel and license\n"
3291 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3292 " -w enable many useful warnings\n"
3293 " -W enable all warnings\n"
3294 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3295 " -X disable all warnings\n"
3297 "Run 'perldoc perl' for more help with Perl.\n\n",
3300 const char * const *p = usage_msg;
3301 PerlIO *out = PerlIO_stdout();
3304 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3307 PerlIO_puts(out, *p++);
3311 /* convert a string of -D options (or digits) into an int.
3312 * sets *s to point to the char after the options */
3316 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3318 static const char * const usage_msgd[] = {
3319 " Debugging flag values: (see also -d)\n"
3320 " p Tokenizing and parsing (with v, displays parse stack)\n"
3321 " s Stack snapshots (with v, displays all stacks)\n"
3322 " l Context (loop) stack processing\n"
3323 " t Trace execution\n"
3324 " o Method and overloading resolution\n",
3325 " c String/numeric conversions\n"
3326 " P Print profiling info, source file input state\n"
3327 " m Memory and SV allocation\n"
3328 " f Format processing\n"
3329 " r Regular expression parsing and execution\n"
3330 " x Syntax tree dump\n",
3331 " u Tainting checks\n"
3332 " H Hash dump -- usurps values()\n"
3333 " X Scratchpad allocation\n"
3335 " S Op slab allocation\n"
3337 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3338 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3339 " v Verbose: use in conjunction with other flags\n"
3340 " C Copy On Write\n"
3341 " A Consistency checks on internal structures\n"
3342 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3343 " M trace smart match resolution\n"
3344 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3345 " L trace some locale setting information--for Perl core development\n",
3346 " i trace PerlIO layer processing\n",
3351 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3354 /* if adding extra options, remember to update DEBUG_MASK */
3355 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3357 for (; isWORDCHAR(**s); (*s)++) {
3358 const char * const d = strchr(debopts,**s);
3360 uv |= 1 << (d - debopts);
3361 else if (ckWARN_d(WARN_DEBUGGING))
3362 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3363 "invalid option -D%c, use -D'' to see choices\n", **s);
3366 else if (isDIGIT(**s)) {
3367 const char* e = *s + strlen(*s);
3368 if (grok_atoUV(*s, &uv, &e))
3370 for (; isWORDCHAR(**s); (*s)++) ;
3372 else if (givehelp) {
3373 const char *const *p = usage_msgd;
3374 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3376 return (int)uv; /* ignore any UV->int conversion loss */
3380 /* This routine handles any switches that can be given during run */
3383 Perl_moreswitches(pTHX_ const char *s)
3387 const char option = *s; /* used to remember option in -m/-M code */
3389 PERL_ARGS_ASSERT_MORESWITCHES;
3397 SvREFCNT_dec(PL_rs);
3398 if (s[1] == 'x' && s[2]) {
3399 const char *e = s+=2;
3405 flags = PERL_SCAN_SILENT_ILLDIGIT;
3406 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3407 if (s + numlen < e) {
3408 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3412 PL_rs = newSVpvs("");
3413 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3414 uvchr_to_utf8(tmps, rschar);
3415 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3420 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3421 if (rschar & ~((U8)~0))
3422 PL_rs = &PL_sv_undef;
3423 else if (!rschar && numlen >= 2)
3424 PL_rs = newSVpvs("");
3426 char ch = (char)rschar;
3427 PL_rs = newSVpvn(&ch, 1);
3430 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3435 PL_unicode = parse_unicode_opts( (const char **)&s );
3436 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3444 while (*s && !isSPACE(*s)) ++s;
3445 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3457 forbid_setid('d', FALSE);
3460 /* -dt indicates to the debugger that threads will be used */
3461 if (*s == 't' && !isWORDCHAR(s[1])) {
3463 my_setenv("PERL5DB_THREADED", "1");
3466 /* The following permits -d:Mod to accepts arguments following an =
3467 in the fashion that -MSome::Mod does. */
3468 if (*s == ':' || *s == '=') {
3475 sv = newSVpvs("no Devel::");
3477 sv = newSVpvs("use Devel::");
3481 end = s + strlen(s);
3483 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3484 while(isWORDCHAR(*s) || *s==':') ++s;
3486 sv_catpvn(sv, start, end - start);
3488 sv_catpvn(sv, start, s-start);
3489 /* Don't use NUL as q// delimiter here, this string goes in the
3491 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3494 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3498 PL_perldb = PERLDB_ALL;
3505 forbid_setid('D', FALSE);
3507 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3508 #else /* !DEBUGGING */
3509 if (ckWARN_d(WARN_DEBUGGING))
3510 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3511 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3512 for (s++; isWORDCHAR(*s); s++) ;
3515 NOT_REACHED; /* NOTREACHED */
3519 NOT_REACHED; /* NOTREACHED */
3522 Safefree(PL_inplace);
3524 const char * const start = ++s;
3525 while (*s && !isSPACE(*s))
3528 PL_inplace = savepvn(start, s - start);
3531 case 'I': /* -I handled both here and in parse_body() */
3532 forbid_setid('I', FALSE);
3534 while (*s && isSPACE(*s))
3539 /* ignore trailing spaces (possibly followed by other switches) */
3541 for (e = p; *e && !isSPACE(*e); e++) ;
3545 } while (*p && *p != '-');
3547 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3553 Perl_croak(aTHX_ "No directory specified for -I");
3559 SvREFCNT_dec(PL_ors_sv);
3565 PL_ors_sv = newSVpvs("\n");
3566 numlen = 3 + (*s == '0');
3567 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3571 if (RsPARA(PL_rs)) {
3572 PL_ors_sv = newSVpvs("\n\n");
3575 PL_ors_sv = newSVsv(PL_rs);
3580 forbid_setid('M', FALSE); /* XXX ? */
3583 forbid_setid('m', FALSE); /* XXX ? */
3588 const char *use = "use ";
3590 /* -M-foo == 'no foo' */
3591 /* Leading space on " no " is deliberate, to make both
3592 possibilities the same length. */
3593 if (*s == '-') { use = " no "; ++s; }
3594 sv = newSVpvn(use,4);
3596 /* We allow -M'Module qw(Foo Bar)' */
3597 while(isWORDCHAR(*s) || *s==':') {
3606 Perl_croak(aTHX_ "Module name required with -%c option",
3609 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3610 "contains single ':'",
3611 (int)(s - start), start, option);
3612 end = s + strlen(s);
3614 sv_catpvn(sv, start, end - start);
3615 if (option == 'm') {
3617 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3618 sv_catpvs( sv, " ()");
3621 sv_catpvn(sv, start, s-start);
3622 /* Use NUL as q''-delimiter. */
3623 sv_catpvs(sv, " split(/,/,q\0");
3625 sv_catpvn(sv, s, end - s);
3626 sv_catpvs(sv, "\0)");
3629 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3632 Perl_croak(aTHX_ "Missing argument to -%c", option);
3643 forbid_setid('s', FALSE);
3644 PL_doswitches = TRUE;
3649 #if defined(SILENT_NO_TAINT_SUPPORT)
3650 /* silently ignore */
3651 #elif defined(NO_TAINT_SUPPORT)
3652 Perl_croak_nocontext("This perl was compiled without taint support. "
3653 "Cowardly refusing to run with -t or -T flags");
3661 PL_do_undump = TRUE;
3671 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3672 PL_dowarn |= G_WARN_ON;
3677 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3678 if (!specialWARN(PL_compiling.cop_warnings))
3679 PerlMemShared_free(PL_compiling.cop_warnings);
3680 PL_compiling.cop_warnings = pWARN_ALL ;
3684 PL_dowarn = G_WARN_ALL_OFF;
3685 if (!specialWARN(PL_compiling.cop_warnings))
3686 PerlMemShared_free(PL_compiling.cop_warnings);
3687 PL_compiling.cop_warnings = pWARN_NONE ;
3694 if (s[0] == '-') /* Additional switches on #! line. */
3699 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3705 #ifdef ALTERNATE_SHEBANG
3706 case 'S': /* OS/2 needs -S on "extproc" line. */
3709 case 'e': case 'f': case 'x': case 'E':
3710 #ifndef ALTERNATE_SHEBANG
3714 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3717 "Unrecognized switch: -%.1s (-h will show valid options)",s
3727 PerlIO * PIO_stdout;
3729 const char * const level_str = "v" PERL_VERSION_STRING;
3730 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3731 #ifdef PERL_PATCHNUM
3733 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3734 static const char num [] = PERL_PATCHNUM "*";
3736 static const char num [] = PERL_PATCHNUM;
3739 const STRLEN num_len = sizeof(num)-1;
3740 /* A very advanced compiler would fold away the strnEQ
3741 and this whole conditional, but most (all?) won't do it.
3742 SV level could also be replaced by with preprocessor
3745 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3746 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3747 of the interp so it might contain format characters
3749 level = newSVpvn(num, num_len);
3751 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3755 SV* level = newSVpvn(level_str, level_len);
3756 #endif /* #ifdef PERL_PATCHNUM */
3757 PIO_stdout = PerlIO_stdout();
3758 PerlIO_printf(PIO_stdout,
3759 "\nThis is perl " STRINGIFY(PERL_REVISION)
3760 ", version " STRINGIFY(PERL_VERSION)
3761 ", subversion " STRINGIFY(PERL_SUBVERSION)
3762 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3764 SvREFCNT_dec_NN(level);
3766 #if defined(LOCAL_PATCH_COUNT)
3767 if (LOCAL_PATCH_COUNT > 0)
3768 PerlIO_printf(PIO_stdout,
3769 "\n(with %d registered patch%s, "
3770 "see perl -V for more detail)",
3772 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3775 PerlIO_printf(PIO_stdout,
3776 "\n\nCopyright 1987-2019, Larry Wall\n");
3778 PerlIO_printf(PIO_stdout,
3779 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3782 PerlIO_printf(PIO_stdout,
3783 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3784 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3787 PerlIO_printf(PIO_stdout,
3788 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3789 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3792 PerlIO_printf(PIO_stdout,
3793 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3796 PerlIO_printf(PIO_stdout,
3797 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3800 PerlIO_printf(PIO_stdout,
3801 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3803 #ifdef __SYMBIAN32__
3804 PerlIO_printf(PIO_stdout,
3805 "Symbian port by Nokia, 2004-2005\n");
3807 #ifdef BINARY_BUILD_NOTICE
3808 BINARY_BUILD_NOTICE;
3810 PerlIO_printf(PIO_stdout,
3812 Perl may be copied only under the terms of either the Artistic License or the\n\
3813 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3814 Complete documentation for Perl, including FAQ lists, should be found on\n\
3815 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3816 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3820 /* compliments of Tom Christiansen */
3822 /* unexec() can be found in the Gnu emacs distribution */
3823 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3826 #include <lib$routines.h>
3830 Perl_my_unexec(pTHX)
3833 SV * prog = newSVpv(BIN_EXP, 0);
3834 SV * file = newSVpv(PL_origfilename, 0);
3838 sv_catpvs(prog, "/perl");
3839 sv_catpvs(file, ".perldump");
3841 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3842 /* unexec prints msg to stderr in case of failure */
3843 PerlProc_exit(status);
3845 PERL_UNUSED_CONTEXT;
3847 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3848 # elif defined(WIN32) || defined(__CYGWIN__)
3849 Perl_croak_nocontext("dump is not supported");
3851 ABORT(); /* for use with undump */
3856 /* initialize curinterp */
3861 # define PERLVAR(prefix,var,type)
3862 # define PERLVARA(prefix,var,n,type)
3863 # if defined(PERL_IMPLICIT_CONTEXT)
3864 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3865 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3867 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3868 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3870 # include "intrpvar.h"
3876 # define PERLVAR(prefix,var,type)
3877 # define PERLVARA(prefix,var,n,type)
3878 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3879 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3880 # include "intrpvar.h"
3890 S_init_main_stash(pTHX)
3895 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(hv);
3896 /* We know that the string "main" will be in the global shared string
3897 table, so it's a small saving to use it rather than allocate another
3899 PL_curstname = newSVpvs_share("main");
3900 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3901 /* If we hadn't caused another reference to "main" to be in the shared
3902 string table above, then it would be worth reordering these two,
3903 because otherwise all we do is delete "main" from it as a consequence
3904 of the SvREFCNT_dec, only to add it again with hv_name_set */
3905 SvREFCNT_dec(GvHV(gv));
3906 hv_name_sets(PL_defstash, "main", 0);
3907 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3909 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3911 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3912 GvMULTI_on(PL_incgv);
3913 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3914 SvREFCNT_inc_simple_void(PL_hintgv);
3915 GvMULTI_on(PL_hintgv);
3916 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3917 SvREFCNT_inc_simple_void(PL_defgv);
3918 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3919 SvREFCNT_inc_simple_void(PL_errgv);
3920 GvMULTI_on(PL_errgv);
3921 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3922 SvREFCNT_inc_simple_void(PL_replgv);
3923 GvMULTI_on(PL_replgv);
3924 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3925 #ifdef PERL_DONT_CREATE_GVSV
3926 (void)gv_SVadd(PL_errgv);
3928 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3930 CopSTASH_set(&PL_compiling, PL_defstash);
3931 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3932 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3934 /* We must init $/ before switches are processed. */
3935 sv_setpvs(get_sv("/", GV_ADD), "\n");
3939 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3942 PerlIO *rsfp = NULL;
3946 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3949 PL_origfilename = savepvs("-e");
3954 /* if find_script() returns, it returns a malloc()-ed value */
3955 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3956 s = scriptname + strlen(scriptname);
3958 if (strBEGINs(scriptname, "/dev/fd/")
3959 && isDIGIT(scriptname[8])
3960 && grok_atoUV(scriptname + 8, &uv, &s)
3961 && uv <= PERL_INT_MAX
3966 * Tell apart "normal" usage of fdscript, e.g.
3967 * with bash on FreeBSD:
3968 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3969 * from usage in suidperl.
3970 * Does any "normal" usage leave garbage after the number???
3971 * Is it a mistake to use a similar /dev/fd/ construct for
3976 * Be supersafe and do some sanity-checks.
3977 * Still, can we be sure we got the right thing?
3980 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3983 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3985 scriptname = savepv(s + 1);
3986 Safefree(PL_origfilename);
3987 PL_origfilename = (char *)scriptname;
3992 CopFILE_free(PL_curcop);
3993 CopFILE_set(PL_curcop, PL_origfilename);
3994 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3995 scriptname = (char *)"";
3996 if (fdscript >= 0) {
3997 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3999 else if (!*scriptname) {
4000 forbid_setid(0, *suidscript);
4004 #ifdef FAKE_BIT_BUCKET
4005 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
4006 * is called) and still have the "-e" work. (Believe it or not,
4007 * a /dev/null is required for the "-e" to work because source
4008 * filter magic is used to implement it. ) This is *not* a general
4009 * replacement for a /dev/null. What we do here is create a temp
4010 * file (an empty file), open up that as the script, and then
4011 * immediately close and unlink it. Close enough for jazz. */
4012 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
4013 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
4014 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
4015 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
4016 FAKE_BIT_BUCKET_TEMPLATE
4018 const char * const err = "Failed to create a fake bit bucket";
4019 if (strEQ(scriptname, BIT_BUCKET)) {
4020 int tmpfd = Perl_my_mkstemp_cloexec(tmpname);
4022 scriptname = tmpname;
4025 Perl_croak(aTHX_ err);
4028 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
4029 #ifdef FAKE_BIT_BUCKET
4030 if ( strBEGINs(scriptname, FAKE_BIT_BUCKET_PREFIX)
4031 && strlen(scriptname) == sizeof(tmpname) - 1)
4035 scriptname = BIT_BUCKET;
4039 /* PSz 16 Sep 03 Keep neat error message */
4041 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
4043 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4044 CopFILE(PL_curcop), Strerror(errno));
4046 fd = PerlIO_fileno(rsfp);
4049 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
4050 && S_ISDIR(tmpstatbuf.st_mode)))
4051 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4058 /* In the days of suidperl, we refused to execute a setuid script stored on
4059 * a filesystem mounted nosuid and/or noexec. This meant that we probed for the
4060 * existence of the appropriate filesystem-statting function, and behaved
4061 * accordingly. But even though suidperl is long gone, we must still include
4062 * those probes for the benefit of modules like Filesys::Df, which expect the
4063 * results of those probes to be stored in %Config; see RT#126368. So mention
4064 * the relevant cpp symbols here, to ensure that metaconfig will include their
4065 * probes in the generated Configure:
4067 * I_SYSSTATVFS HAS_FSTATVFS
4069 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
4070 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
4074 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4075 /* Don't even need this function. */
4078 S_validate_suid(pTHX_ PerlIO *rsfp)
4080 const Uid_t my_uid = PerlProc_getuid();
4081 const Uid_t my_euid = PerlProc_geteuid();
4082 const Gid_t my_gid = PerlProc_getgid();
4083 const Gid_t my_egid = PerlProc_getegid();
4085 PERL_ARGS_ASSERT_VALIDATE_SUID;
4087 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
4089 int fd = PerlIO_fileno(rsfp);
4091 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
4092 Perl_croak_nocontext( "Illegal suidscript");
4094 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
4096 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
4099 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4100 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4101 /* not set-id, must be wrapped */
4104 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4107 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4112 PERL_ARGS_ASSERT_FIND_BEGINNING;
4114 /* skip forward in input to the real script? */
4117 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4118 Perl_croak(aTHX_ "No Perl script found in input\n");
4120 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
4121 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4122 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4124 while (*s == ' ' || *s == '\t') s++;
4126 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4127 || s2[-1] == '_') s2--;
4128 if (strBEGINs(s2-4,"perl"))
4129 while ((s = moreswitches(s)))
4138 /* no need to do anything here any more if we don't
4140 #ifndef NO_TAINT_SUPPORT
4141 const Uid_t my_uid = PerlProc_getuid();
4142 const Uid_t my_euid = PerlProc_geteuid();
4143 const Gid_t my_gid = PerlProc_getgid();
4144 const Gid_t my_egid = PerlProc_getegid();
4146 PERL_UNUSED_CONTEXT;
4148 /* Should not happen: */
4149 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
4150 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
4154 * Should go by suidscript, not uid!=euid: why disallow
4155 * system("ls") in scripts run from setuid things?
4156 * Or, is this run before we check arguments and set suidscript?
4157 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4158 * (We never have suidscript, can we be sure to have fdscript?)
4159 * Or must then go by UID checks? See comments in forbid_setid also.
4163 /* This is used very early in the lifetime of the program,
4164 * before even the options are parsed, so PL_tainting has
4165 * not been initialized properly. */
4167 Perl_doing_taint(int argc, char *argv[], char *envp[])
4169 #ifndef PERL_IMPLICIT_SYS
4170 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4171 * before we have an interpreter-- and the whole point of this
4172 * function is to be called at such an early stage. If you are on
4173 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4174 * "tainted because running with altered effective ids', you'll
4175 * have to add your own checks somewhere in here. The two most
4176 * known samples of 'implicitness' are Win32 and NetWare, neither
4177 * of which has much of concept of 'uids'. */
4178 Uid_t uid = PerlProc_getuid();
4179 Uid_t euid = PerlProc_geteuid();
4180 Gid_t gid = PerlProc_getgid();
4181 Gid_t egid = PerlProc_getegid();
4188 if (uid && (euid != uid || egid != gid))
4190 #endif /* !PERL_IMPLICIT_SYS */
4191 /* This is a really primitive check; environment gets ignored only
4192 * if -T are the first chars together; otherwise one gets
4193 * "Too late" message. */
4194 if ( argc > 1 && argv[1][0] == '-'
4195 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4200 /* Passing the flag as a single char rather than a string is a slight space
4201 optimisation. The only message that isn't /^-.$/ is
4202 "program input from stdin", which is substituted in place of '\0', which
4203 could never be a command line flag. */
4205 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4207 char string[3] = "-x";
4208 const char *message = "program input from stdin";
4210 PERL_UNUSED_CONTEXT;
4216 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4217 if (PerlProc_getuid() != PerlProc_geteuid())
4218 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4219 if (PerlProc_getgid() != PerlProc_getegid())
4220 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4221 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4223 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4227 Perl_init_dbargs(pTHX)
4229 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4234 /* Someone has already created it.
4235 It might have entries, and if we just turn off AvREAL(), they will
4236 "leak" until global destruction. */
4238 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4239 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4241 AvREIFY_only(PL_dbargs);
4245 Perl_init_debugger(pTHX)
4247 HV * const ostash = PL_curstash;
4250 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4252 Perl_init_dbargs(aTHX);
4253 PL_DBgv = MUTABLE_GV(
4254 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4256 PL_DBline = MUTABLE_GV(
4257 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4259 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4260 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4262 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4263 if (!SvIOK(PL_DBsingle))
4264 sv_setiv(PL_DBsingle, 0);
4265 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4266 mg->mg_private = DBVARMG_SINGLE;
4267 SvSETMAGIC(PL_DBsingle);
4269 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4270 if (!SvIOK(PL_DBtrace))
4271 sv_setiv(PL_DBtrace, 0);
4272 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4273 mg->mg_private = DBVARMG_TRACE;
4274 SvSETMAGIC(PL_DBtrace);
4276 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4277 if (!SvIOK(PL_DBsignal))
4278 sv_setiv(PL_DBsignal, 0);
4279 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4280 mg->mg_private = DBVARMG_SIGNAL;
4281 SvSETMAGIC(PL_DBsignal);
4283 SvREFCNT_dec(PL_curstash);
4284 PL_curstash = ostash;
4287 #ifndef STRESS_REALLOC
4288 #define REASONABLE(size) (size)
4289 #define REASONABLE_but_at_least(size,min) (size)
4291 #define REASONABLE(size) (1) /* unreasonable */
4292 #define REASONABLE_but_at_least(size,min) (min)
4296 Perl_init_stacks(pTHX)
4300 /* start with 128-item stack and 8K cxstack */
4301 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4302 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4303 PL_curstackinfo->si_type = PERLSI_MAIN;
4304 #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
4305 PL_curstackinfo->si_stack_hwm = 0;
4307 PL_curstack = PL_curstackinfo->si_stack;
4308 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4310 PL_stack_base = AvARRAY(PL_curstack);
4311 PL_stack_sp = PL_stack_base;
4312 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4314 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4317 PL_tmps_max = REASONABLE(128);
4319 Newx(PL_markstack,REASONABLE(32),I32);
4320 PL_markstack_ptr = PL_markstack;
4321 PL_markstack_max = PL_markstack + REASONABLE(32);
4325 Newx(PL_scopestack,REASONABLE(32),I32);
4327 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4329 PL_scopestack_ix = 0;
4330 PL_scopestack_max = REASONABLE(32);
4332 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4333 Newx(PL_savestack, size, ANY);
4334 PL_savestack_ix = 0;
4335 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4336 PL_savestack_max = size - SS_MAXPUSH;
4344 while (PL_curstackinfo->si_next)
4345 PL_curstackinfo = PL_curstackinfo->si_next;
4346 while (PL_curstackinfo) {
4347 PERL_SI *p = PL_curstackinfo->si_prev;
4348 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4349 Safefree(PL_curstackinfo->si_cxstack);
4350 Safefree(PL_curstackinfo);
4351 PL_curstackinfo = p;
4353 Safefree(PL_tmps_stack);
4354 Safefree(PL_markstack);
4355 Safefree(PL_scopestack);
4357 Safefree(PL_scopestack_name);
4359 Safefree(PL_savestack);
4363 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4365 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4366 AV *const isa = GvAVn(gv);
4369 PERL_ARGS_ASSERT_POPULATE_ISA;
4371 if(AvFILLp(isa) != -1)
4374 /* NOTE: No support for tied ISA */
4376 va_start(args, len);
4378 const char *const parent = va_arg(args, const char*);
4383 parent_len = va_arg(args, size_t);
4385 /* Arguments are supplied with a trailing :: */
4386 assert(parent_len > 2);
4387 assert(parent[parent_len - 1] == ':');
4388 assert(parent[parent_len - 2] == ':');
4389 av_push(isa, newSVpvn(parent, parent_len - 2));
4390 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4397 S_init_predump_symbols(pTHX)
4402 sv_setpvs(get_sv("\"", GV_ADD), " ");
4403 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4406 /* Historically, PVIOs were blessed into IO::Handle, unless
4407 FileHandle was loaded, in which case they were blessed into
4408 that. Action at a distance.
4409 However, if we simply bless into IO::Handle, we break code
4410 that assumes that PVIOs will have (among others) a seek
4411 method. IO::File inherits from IO::Handle and IO::Seekable,
4412 and provides the needed methods. But if we simply bless into
4413 it, then we break code that assumed that by loading
4414 IO::Handle, *it* would work.
4415 So a compromise is to set up the correct @IO::File::ISA,
4416 so that code that does C<use IO::Handle>; will still work.
4419 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4420 STR_WITH_LEN("IO::Handle::"),
4421 STR_WITH_LEN("IO::Seekable::"),
4422 STR_WITH_LEN("Exporter::"),
4425 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4426 GvMULTI_on(PL_stdingv);
4427 io = GvIOp(PL_stdingv);
4428 IoTYPE(io) = IoTYPE_RDONLY;
4429 IoIFP(io) = PerlIO_stdin();
4430 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4432 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4434 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4437 IoTYPE(io) = IoTYPE_WRONLY;
4438 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4440 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4442 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4444 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4445 GvMULTI_on(PL_stderrgv);
4446 io = GvIOp(PL_stderrgv);
4447 IoTYPE(io) = IoTYPE_WRONLY;
4448 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4449 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4451 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4453 PL_statname = newSVpvs(""); /* last filename we did stat on */
4457 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4459 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4461 argc--,argv++; /* skip name of script */
4462 if (PL_doswitches) {
4463 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4467 if (argv[0][1] == '-' && !argv[0][2]) {
4471 if ((s = strchr(argv[0], '='))) {
4472 const char *const start_name = argv[0] + 1;
4473 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4474 TRUE, SVt_PV)), s + 1);
4477 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4480 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4481 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4482 GvMULTI_on(PL_argvgv);
4483 av_clear(GvAVn(PL_argvgv));
4484 for (; argc > 0; argc--,argv++) {
4485 SV * const sv = newSVpv(argv[0],0);
4486 av_push(GvAV(PL_argvgv),sv);
4487 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4488 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4491 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4492 (void)sv_utf8_decode(sv);
4496 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4497 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4498 "-i used with no filenames on the command line, "
4499 "reading from STDIN");
4503 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4510 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4512 PL_toptarget = newSV_type(SVt_PVIV);
4513 SvPVCLEAR(PL_toptarget);
4514 PL_bodytarget = newSV_type(SVt_PVIV);
4515 SvPVCLEAR(PL_bodytarget);
4516 PL_formtarget = PL_bodytarget;
4520 init_argv_symbols(argc,argv);
4522 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4523 sv_setpv(GvSV(tmpgv),PL_origfilename);
4525 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4527 bool env_is_not_environ;
4528 SvREFCNT_inc_simple_void_NN(PL_envgv);
4529 GvMULTI_on(PL_envgv);
4530 hv = GvHVn(PL_envgv);
4531 hv_magic(hv, NULL, PERL_MAGIC_env);
4533 #ifdef USE_ENVIRON_ARRAY
4534 /* Note that if the supplied env parameter is actually a copy
4535 of the global environ then it may now point to free'd memory
4536 if the environment has been modified since. To avoid this
4537 problem we treat env==NULL as meaning 'use the default'
4541 env_is_not_environ = env != environ;
4542 if (env_is_not_environ
4543 # ifdef USE_ITHREADS
4544 && PL_curinterp == aTHX
4556 for (; *env; env++) {
4559 if (!(s = strchr(old_var,'=')) || s == old_var)
4563 #if defined(MSDOS) && !defined(DJGPP)
4565 (void)strupr(old_var);
4568 if (hv_exists(hv, old_var, nlen)) {
4569 const char *name = savepvn(old_var, nlen);
4571 /* make sure we use the same value as getenv(), otherwise code that
4572 uses getenv() (like setlocale()) might see a different value to %ENV
4574 sv = newSVpv(PerlEnv_getenv(name), 0);
4576 /* keep a count of the dups of this name so we can de-dup environ later */
4577 if (hv_exists(dups, name, nlen))
4578 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4580 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4585 sv = newSVpv(s+1, 0);
4587 (void)hv_store(hv, old_var, nlen, sv, 0);
4588 if (env_is_not_environ)
4592 /* environ has some duplicate definitions, remove them */
4595 while ((entry = hv_iternext_flags(dups, 0))) {
4597 const char *name = HePV(entry, nlen);
4598 IV count = SvIV(HeVAL(entry));
4600 SV **valp = hv_fetch(hv, name, nlen, 0);
4604 /* try to remove any duplicate names, depending on the
4605 * implementation used in my_setenv() the iteration might
4606 * not be necessary, but let's be safe.
4608 for (i = 0; i < count; ++i)
4611 /* and set it back to the value we set $ENV{name} to */
4612 my_setenv(name, SvPV_nolen(*valp));
4615 SvREFCNT_dec_NN(dups);
4617 #endif /* USE_ENVIRON_ARRAY */
4618 #endif /* !PERL_MICRO */
4622 /* touch @F array to prevent spurious warnings 20020415 MJD */
4624 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4629 S_init_perllib(pTHX)
4632 const char *perl5lib = NULL;
4635 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4639 if (!TAINTING_get) {
4641 perl5lib = PerlEnv_getenv("PERL5LIB");
4643 * It isn't possible to delete an environment variable with
4644 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4645 * case we treat PERL5LIB as undefined if it has a zero-length value.
4647 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4648 if (perl5lib && *perl5lib != '\0')
4652 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4654 s = PerlEnv_getenv("PERLLIB");
4656 incpush_use_sep(s, 0, 0);
4659 /* Treat PERL5?LIB as a possible search list logical name -- the
4660 * "natural" VMS idiom for a Unix path string. We allow each
4661 * element to be a set of |-separated directories for compatibility.
4665 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4667 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4668 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4670 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4671 incpush_use_sep(buf, 0, 0);
4676 #ifndef PERL_IS_MINIPERL
4677 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4678 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4680 #include "perl_inc_macro.h"
4681 /* Use the ~-expanded versions of APPLLIB (undocumented),
4682 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4685 INCPUSH_SITEARCH_EXP
4687 INCPUSH_PERL_VENDORARCH_EXP
4688 INCPUSH_PERL_VENDORLIB_EXP
4691 INCPUSH_PERL_OTHERLIBDIRS
4693 INCPUSH_APPLLIB_OLD_EXP
4694 INCPUSH_SITELIB_STEM
4695 INCPUSH_PERL_VENDORLIB_STEM
4696 INCPUSH_PERL_OTHERLIBDIRS_ARCHONLY
4698 #endif /* !PERL_IS_MINIPERL */
4700 if (!TAINTING_get) {
4701 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4702 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4703 if (unsafe && strEQ(unsafe, "1"))
4705 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4709 #if defined(DOSISH) || defined(__SYMBIAN32__)
4710 # define PERLLIB_SEP ';'
4711 #elif defined(__VMS)
4712 # define PERLLIB_SEP PL_perllib_sep
4714 # define PERLLIB_SEP ':'
4716 #ifndef PERLLIB_MANGLE
4717 # define PERLLIB_MANGLE(s,n) (s)
4720 #ifndef PERL_IS_MINIPERL
4721 /* Push a directory onto @INC if it exists.
4722 Generate a new SV if we do this, to save needing to copy the SV we push
4725 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4729 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4731 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4732 S_ISDIR(tmpstatbuf.st_mode)) {
4734 dir = newSVsv(stem);
4736 /* Truncate dir back to stem. */
4737 SvCUR_set(dir, SvCUR(stem));
4744 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4746 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4749 PERL_ARGS_ASSERT_MAYBERELOCATE;
4752 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4753 defined to so something (in os2/os2.c), but the code has been
4754 this way, ignoring any possible changed of length, since
4755 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4757 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4763 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4765 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4766 sv_usepvn(libdir,unix,len);
4769 PerlIO_printf(Perl_error_log,
4770 "Failed to unixify @INC element \"%s\"\n",
4771 SvPV_nolen_const(libdir));
4775 /* Do the if() outside the #ifdef to avoid warnings about an unused
4778 #ifdef PERL_RELOCATABLE_INC
4780 * Relocatable include entries are marked with a leading .../
4783 * 0: Remove that leading ".../"
4784 * 1: Remove trailing executable name (anything after the last '/')
4785 * from the perl path to give a perl prefix
4787 * While the @INC element starts "../" and the prefix ends with a real
4788 * directory (ie not . or ..) chop that real directory off the prefix
4789 * and the leading "../" from the @INC element. ie a logical "../"
4791 * Finally concatenate the prefix and the remainder of the @INC element
4792 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4793 * generates /usr/local/lib/perl5
4795 const char *libpath = SvPVX(libdir);
4796 STRLEN libpath_len = SvCUR(libdir);
4797 if (memBEGINs(libpath, libpath_len, ".../")) {
4799 SV * const caret_X = get_sv("\030", 0);
4800 /* Going to use the SV just as a scratch buffer holding a C
4806 /* $^X is *the* source of taint if tainting is on, hence
4807 SvPOK() won't be true. */
4809 assert(SvPOKp(caret_X));
4810 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4812 /* Firstly take off the leading .../
4813 If all else fail we'll do the paths relative to the current
4815 sv_chop(libdir, libpath + 4);
4816 /* Don't use SvPV as we're intentionally bypassing taining,
4817 mortal copies that the mg_get of tainting creates, and
4818 corruption that seems to come via the save stack.
4819 I guess that the save stack isn't correctly set up yet. */
4820 libpath = SvPVX(libdir);
4821 libpath_len = SvCUR(libdir);
4823 prefix = SvPVX(prefix_sv);
4824 lastslash = (char *) my_memrchr(prefix, '/',
4825 SvEND(prefix_sv) - prefix);
4827 /* First time in with the *lastslash = '\0' we just wipe off
4828 the trailing /perl from (say) /usr/foo/bin/perl
4832 while ((*lastslash = '\0'), /* Do that, come what may. */
4833 ( memBEGINs(libpath, libpath_len, "../")
4835 (char *) my_memrchr(prefix, '/',
4836 SvEND(prefix_sv) - prefix))))
4838 if (lastslash[1] == '\0'
4839 || (lastslash[1] == '.'
4840 && (lastslash[2] == '/' /* ends "/." */
4841 || (lastslash[2] == '/'
4842 && lastslash[3] == '/' /* or "/.." */
4844 /* Prefix ends "/" or "/." or "/..", any of which
4845 are fishy, so don't do any more logical cleanup.
4849 /* Remove leading "../" from path */
4852 /* Next iteration round the loop removes the last
4853 directory name from prefix by writing a '\0' in
4854 the while clause. */
4856 /* prefix has been terminated with a '\0' to the correct
4857 length. libpath points somewhere into the libdir SV.
4858 We need to join the 2 with '/' and drop the result into
4860 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4861 SvREFCNT_dec(libdir);
4862 /* And this is the new libdir. */
4865 (PerlProc_getuid() != PerlProc_geteuid() ||
4866 PerlProc_getgid() != PerlProc_getegid())) {
4867 /* Need to taint relocated paths if running set ID */
4868 SvTAINTED_on(libdir);
4871 SvREFCNT_dec(prefix_sv);
4879 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4881 #ifndef PERL_IS_MINIPERL
4882 const U8 using_sub_dirs
4883 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4884 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4885 const U8 add_versioned_sub_dirs
4886 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4887 const U8 add_archonly_sub_dirs
4888 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4889 #ifdef PERL_INC_VERSION_LIST
4890 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4893 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4894 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4895 AV *const inc = GvAVn(PL_incgv);
4897 PERL_ARGS_ASSERT_INCPUSH;
4900 /* Could remove this vestigial extra block, if we don't mind a lot of
4901 re-indenting diff noise. */
4903 SV *const libdir = mayberelocate(dir, len, flags);
4904 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4905 arranged to unshift #! line -I onto the front of @INC. However,
4906 -I can add version and architecture specific libraries, and they
4907 need to go first. The old code assumed that it was always
4908 pushing. Hence to make it work, need to push the architecture
4909 (etc) libraries onto a temporary array, then "unshift" that onto
4910 the front of @INC. */
4911 #ifndef PERL_IS_MINIPERL
4912 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4915 * BEFORE pushing libdir onto @INC we may first push version- and
4916 * archname-specific sub-directories.
4918 if (using_sub_dirs) {
4919 SV *subdir = newSVsv(libdir);
4920 #ifdef PERL_INC_VERSION_LIST
4921 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4922 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4923 const char * const *incver;
4926 if (add_versioned_sub_dirs) {
4927 /* .../version/archname if -d .../version/archname */
4928 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4929 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4931 /* .../version if -d .../version */
4932 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4933 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4936 #ifdef PERL_INC_VERSION_LIST
4938 for (incver = incverlist; *incver; incver++) {
4939 /* .../xxx if -d .../xxx */
4940 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4941 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4946 if (add_archonly_sub_dirs) {
4947 /* .../archname if -d .../archname */
4948 sv_catpvs(subdir, "/" ARCHNAME);
4949 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4953 assert (SvREFCNT(subdir) == 1);
4954 SvREFCNT_dec(subdir);
4956 #endif /* !PERL_IS_MINIPERL */
4957 /* finally add this lib directory at the end of @INC */
4959 #ifdef PERL_IS_MINIPERL
4960 const Size_t extra = 0;
4962 Size_t extra = av_tindex(av) + 1;
4964 av_unshift(inc, extra + push_basedir);
4966 av_store(inc, extra, libdir);
4967 #ifndef PERL_IS_MINIPERL
4969 /* av owns a reference, av_store() expects to be donated a
4970 reference, and av expects to be sane when it's cleared.
4971 If I wanted to be naughty and wrong, I could peek inside the
4972 implementation of av_clear(), realise that it uses
4973 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4974 and so directly steal from it (with a memcpy() to inc, and
4975 then memset() to NULL them out. But people copy code from the
4976 core expecting it to be best practise, so let's use the API.
4977 Although studious readers will note that I'm not checking any
4979 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4984 else if (push_basedir) {
4985 av_push(inc, libdir);
4988 if (!push_basedir) {
4989 assert (SvREFCNT(libdir) == 1);
4990 SvREFCNT_dec(libdir);
4996 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
5000 /* This logic has been broken out from S_incpush(). It may be possible to
5003 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
5005 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
5006 * argument to incpush_use_sep. This allows creation of relocatable
5007 * Perl distributions that patch the binary at install time. Those
5008 * distributions will have to provide their own relocation tools; this
5009 * is not a feature otherwise supported by core Perl.
5011 #ifndef PERL_RELOCATABLE_INCPUSH
5018 /* Break at all separators */
5019 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
5021 /* skip any consecutive separators */
5023 /* Uncomment the next line for PATH semantics */
5024 /* But you'll need to write tests */
5025 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
5027 incpush(p, (STRLEN)(s - p), flags);
5032 incpush(p, (STRLEN)(end - p), flags);
5037 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5040 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5046 PERL_ARGS_ASSERT_CALL_LIST;
5048 while (av_tindex(paramList) >= 0) {
5049 cv = MUTABLE_CV(av_shift(paramList));
5051 if (paramList == PL_beginav) {
5052 /* save PL_beginav for compiler */
5053 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5055 else if (paramList == PL_checkav) {
5056 /* save PL_checkav for compiler */
5057 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5059 else if (paramList == PL_unitcheckav) {
5060 /* save PL_unitcheckav for compiler */
5061 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5071 (void)SvPV_const(atsv, len);
5073 PL_curcop = &PL_compiling;
5074 CopLINE_set(PL_curcop, oldline);
5075 if (paramList == PL_beginav)
5076 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5078 Perl_sv_catpvf(aTHX_ atsv,
5079 "%s failed--call queue aborted",
5080 paramList == PL_checkav ? "CHECK"
5081 : paramList == PL_initav ? "INIT"
5082 : paramList == PL_unitcheckav ? "UNITCHECK"
5084 while (PL_scopestack_ix > oldscope)
5087 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5094 /* my_exit() was called */
5095 while (PL_scopestack_ix > oldscope)
5098 SET_CURSTASH(PL_defstash);
5099 PL_curcop = &PL_compiling;
5100 CopLINE_set(PL_curcop, oldline);
5103 NOT_REACHED; /* NOTREACHED */
5106 PL_curcop = &PL_compiling;
5107 CopLINE_set(PL_curcop, oldline);
5110 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5119 Perl_my_exit(pTHX_ U32 status)
5121 if (PL_exit_flags & PERL_EXIT_ABORT) {
5124 if (PL_exit_flags & PERL_EXIT_WARN) {
5125 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5126 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5127 PL_exit_flags &= ~PERL_EXIT_ABORT;
5137 STATUS_EXIT_SET(status);
5144 Perl_my_failure_exit(pTHX)
5147 /* We have been called to fall on our sword. The desired exit code
5148 * should be already set in STATUS_UNIX, but could be shifted over
5149 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5152 * If an error code has not been set, then force the issue.
5154 if (MY_POSIX_EXIT) {
5156 /* According to the die_exit.t tests, if errno is non-zero */
5157 /* It should be used for the error status. */
5159 if (errno == EVMSERR) {
5160 STATUS_NATIVE = vaxc$errno;
5163 /* According to die_exit.t tests, if the child_exit code is */
5164 /* also zero, then we need to exit with a code of 255 */
5165 if ((errno != 0) && (errno < 256))
5166 STATUS_UNIX_EXIT_SET(errno);
5167 else if (STATUS_UNIX < 255) {
5168 STATUS_UNIX_EXIT_SET(255);
5173 /* The exit code could have been set by $? or vmsish which
5174 * means that it may not have fatal set. So convert
5175 * success/warning codes to fatal with out changing
5176 * the POSIX status code. The severity makes VMS native
5177 * status handling work, while UNIX mode programs use the
5178 * the POSIX exit codes.
5180 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5181 STATUS_NATIVE &= STS$M_COND_ID;
5182 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5186 /* Traditionally Perl on VMS always expects a Fatal Error. */
5187 if (vaxc$errno & 1) {
5189 /* So force success status to failure */
5190 if (STATUS_NATIVE & 1)
5195 STATUS_UNIX = EINTR; /* In case something cares */
5200 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5202 /* Encode the severity code */
5203 severity = STATUS_NATIVE & STS$M_SEVERITY;
5204 STATUS_UNIX = (severity ? severity : 1) << 8;
5206 /* Perl expects this to be a fatal error */
5207 if (severity != STS$K_SEVERE)
5217 STATUS_UNIX_SET(eno);
5219 exitstatus = STATUS_UNIX >> 8;
5220 if (exitstatus & 255)
5221 STATUS_UNIX_SET(exitstatus);
5223 STATUS_UNIX_SET(255);
5226 if (PL_exit_flags & PERL_EXIT_ABORT) {
5229 if (PL_exit_flags & PERL_EXIT_WARN) {
5230 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5231 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5232 PL_exit_flags &= ~PERL_EXIT_ABORT;
5238 S_my_exit_jump(pTHX)
5241 SvREFCNT_dec(PL_e_script);
5245 POPSTACK_TO(PL_mainstack);
5246 if (cxstack_ix >= 0) {
5248 cx_popblock(cxstack);
5256 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5258 const char * const p = SvPVX_const(PL_e_script);
5259 const char * const e = SvEND(PL_e_script);
5260 const char *nl = (char *) memchr(p, '\n', e - p);
5262 PERL_UNUSED_ARG(idx);
5263 PERL_UNUSED_ARG(maxlen);
5265 nl = (nl) ? nl+1 : e;
5267 filter_del(read_e_script);
5270 sv_catpvn(buf_sv, p, nl-p);
5271 sv_chop(PL_e_script, nl);
5275 /* removes boilerplate code at the end of each boot_Module xsub */
5277 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5280 call_list(PL_scopestack_ix, PL_unitcheckav);
5285 * ex: set ts=8 sts=4 sw=4 et: