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 Am|int|perl_destruct|PerlInterpreter *my_perl
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;
630 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
632 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
635 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
639 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
645 if (destruct_level < i) destruct_level = i;
647 #ifdef PERL_TRACK_MEMPOOL
648 /* RT #114496, for perl_free */
649 PL_perl_destruct_level = i;
655 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
661 if (PL_endav && !PL_minus_c) {
662 PERL_SET_PHASE(PERL_PHASE_END);
663 call_list(PL_scopestack_ix, PL_endav);
669 assert(PL_scopestack_ix == 0);
671 /* normally when we get here, PL_parser should be null due to having
672 * its original (null) value restored by SAVEt_PARSER during leaving
673 * scope (usually before run-time starts in fact).
674 * But if a thread is created within a BEGIN block, the parser is
675 * duped, but the SAVEt_PARSER savestack entry isn't. So PL_parser
676 * never gets cleaned up.
677 * Clean it up here instead. This is a bit of a hack.
680 /* stop parser_free() stomping on PL_curcop */
681 PL_parser->saved_curcop = PL_curcop;
682 parser_free(PL_parser);
686 /* Need to flush since END blocks can produce output */
687 /* flush stdout separately, since we can identify it */
690 PerlIO *stdo = PerlIO_stdout();
691 if (*stdo && PerlIO_flush(stdo)) {
692 PerlIO_restore_errno(stdo);
694 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s\n",
703 #ifdef PERL_TRACE_OPS
704 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
706 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
709 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
713 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
714 for (i = 0; i <= OP_max; ++i) {
715 if (PL_op_exec_cnt[i])
716 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
718 /* Utility slot for easily doing little tracing experiments in the runloop: */
719 if (PL_op_exec_cnt[OP_max+1] != 0)
720 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
721 PerlIO_printf(Perl_debug_log, "\n");
726 if (PL_threadhook(aTHX)) {
727 /* Threads hook has vetoed further cleanup */
728 PL_veto_cleanup = TRUE;
732 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
733 if (destruct_level != 0) {
734 /* Fork here to create a child. Our child's job is to preserve the
735 state of scalars prior to destruction, so that we can instruct it
736 to dump any scalars that we later find have leaked.
737 There's no subtlety in this code - it assumes POSIX, and it doesn't
741 if(PerlSock_socketpair_cloexec(AF_UNIX, SOCK_STREAM, 0, fd)) {
742 perror("Debug leaking scalars socketpair failed");
748 perror("Debug leaking scalars fork failed");
752 /* We are the child */
753 const int sock = fd[1];
754 const int debug_fd = PerlIO_fileno(Perl_debug_log);
757 /* Our success message is an integer 0, and a char 0 */
758 static const char success[sizeof(int) + 1] = {0};
762 /* We need to close all other file descriptors otherwise we end up
763 with interesting hangs, where the parent closes its end of a
764 pipe, and sits waiting for (another) child to terminate. Only
765 that child never terminates, because it never gets EOF, because
766 we also have the far end of the pipe open. We even need to
767 close the debugging fd, because sometimes it happens to be one
768 end of a pipe, and a process is waiting on the other end for
769 EOF. Normally it would be closed at some point earlier in
770 destruction, but if we happen to cause the pipe to remain open,
771 EOF never occurs, and we get an infinite hang. Hence all the
772 games to pass in a file descriptor if it's actually needed. */
774 f = sysconf(_SC_OPEN_MAX);
776 where = "sysconf failed";
787 union control_un control;
790 struct cmsghdr *cmptr;
794 msg.msg_control = control.control;
795 msg.msg_controllen = sizeof(control.control);
796 /* We're a connected socket so we don't need a source */
800 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
802 vec[0].iov_base = (void*)⌖
803 vec[0].iov_len = sizeof(target);
805 got = recvmsg(sock, &msg, 0);
810 where = "recv failed";
813 if(got < sizeof(target)) {
814 where = "short recv";
818 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
822 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
823 where = "wrong cmsg_len";
826 if(cmptr->cmsg_level != SOL_SOCKET) {
827 where = "wrong cmsg_level";
830 if(cmptr->cmsg_type != SCM_RIGHTS) {
831 where = "wrong cmsg_type";
835 got_fd = *(int*)CMSG_DATA(cmptr);
836 /* For our last little bit of trickery, put the file descriptor
837 back into Perl_debug_log, as if we never actually closed it
839 if(got_fd != debug_fd) {
840 if (PerlLIO_dup2_cloexec(got_fd, debug_fd) == -1) {
847 PerlIO_flush(Perl_debug_log);
849 got = write(sock, &success, sizeof(success));
852 where = "write failed";
855 if(got < sizeof(success)) {
856 where = "short write";
863 int send_errno = errno;
864 unsigned char length = (unsigned char) strlen(where);
865 struct iovec failure[3] = {
866 {(void*)&send_errno, sizeof(send_errno)},
868 {(void*)where, length}
870 int got = writev(sock, failure, 3);
871 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
872 in the parent if we try to read from the socketpair after the
873 child has exited, even if there was data to read.
874 So sleep a bit to give the parent a fighting chance of
877 _exit((got == -1) ? errno : 0);
881 PL_dumper_fd = fd[0];
886 /* We must account for everything. */
888 /* Destroy the main CV and syntax tree */
889 /* Set PL_curcop now, because destroying ops can cause new SVs
890 to be generated in Perl_pad_swipe, and when running with
891 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
892 op from which the filename structure member is copied. */
893 PL_curcop = &PL_compiling;
895 /* ensure comppad/curpad to refer to main's pad */
896 if (CvPADLIST(PL_main_cv)) {
897 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
898 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
900 op_free(PL_main_root);
903 PL_main_start = NULL;
904 /* note that PL_main_cv isn't usually actually freed at this point,
905 * due to the CvOUTSIDE refs from subs compiled within it. It will
906 * get freed once all the subs are freed in sv_clean_all(), for
907 * destruct_level > 0 */
908 SvREFCNT_dec(PL_main_cv);
910 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
912 /* Tell PerlIO we are about to tear things apart in case
913 we have layers which are using resources that should
917 PerlIO_destruct(aTHX);
920 * Try to destruct global references. We do this first so that the
921 * destructors and destructees still exist. Some sv's might remain.
922 * Non-referenced objects are on their own.
926 /* unhook hooks which will soon be, or use, destroyed data */
927 SvREFCNT_dec(PL_warnhook);
929 SvREFCNT_dec(PL_diehook);
932 /* call exit list functions */
933 while (PL_exitlistlen-- > 0)
934 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
936 Safefree(PL_exitlist);
941 SvREFCNT_dec(PL_registered_mros);
943 /* jettison our possibly duplicated environment */
944 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
945 * so we certainly shouldn't free it here
948 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
949 if (environ != PL_origenviron && !PL_use_safe_putenv
951 /* only main thread can free environ[0] contents */
952 && PL_curinterp == aTHX
958 for (i = 0; environ[i]; i++)
959 safesysfree(environ[i]);
961 /* Must use safesysfree() when working with environ. */
962 safesysfree(environ);
964 environ = PL_origenviron;
967 #endif /* !PERL_MICRO */
969 if (destruct_level == 0) {
971 DEBUG_P(debprofdump());
973 #if defined(PERLIO_LAYERS)
974 /* No more IO - including error messages ! */
975 PerlIO_cleanup(aTHX);
978 CopFILE_free(&PL_compiling);
980 /* The exit() function will do everything that needs doing. */
984 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
987 /* the syntax tree is shared between clones
988 * so op_free(PL_main_root) only ReREFCNT_dec's
989 * REGEXPs in the parent interpreter
990 * we need to manually ReREFCNT_dec for the clones
993 I32 i = AvFILLp(PL_regex_padav);
994 SV **ary = AvARRAY(PL_regex_padav);
997 SvREFCNT_dec(ary[i]);
998 ary[i] = &PL_sv_undef;
1004 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
1005 PL_stashcache = NULL;
1007 /* loosen bonds of global variables */
1009 /* XXX can PL_parser still be non-null here? */
1010 if(PL_parser && PL_parser->rsfp) {
1011 (void)PerlIO_close(PL_parser->rsfp);
1012 PL_parser->rsfp = NULL;
1016 Safefree(PL_splitstr);
1026 PL_doswitches = FALSE;
1027 PL_dowarn = G_WARN_OFF;
1028 #ifdef PERL_SAWAMPERSAND
1029 PL_sawampersand = 0; /* must save all match strings */
1033 Safefree(PL_inplace);
1035 SvREFCNT_dec(PL_patchlevel);
1038 SvREFCNT_dec(PL_e_script);
1044 /* magical thingies */
1046 SvREFCNT_dec(PL_ofsgv); /* *, */
1049 SvREFCNT_dec(PL_ors_sv); /* $\ */
1052 SvREFCNT_dec(PL_rs); /* $/ */
1055 Safefree(PL_osname); /* $^O */
1058 SvREFCNT_dec(PL_statname);
1062 /* defgv, aka *_ should be taken care of elsewhere */
1065 Safefree(PL_efloatbuf);
1066 PL_efloatbuf = NULL;
1069 /* startup and shutdown function lists */
1070 SvREFCNT_dec(PL_beginav);
1071 SvREFCNT_dec(PL_beginav_save);
1072 SvREFCNT_dec(PL_endav);
1073 SvREFCNT_dec(PL_checkav);
1074 SvREFCNT_dec(PL_checkav_save);
1075 SvREFCNT_dec(PL_unitcheckav);
1076 SvREFCNT_dec(PL_unitcheckav_save);
1077 SvREFCNT_dec(PL_initav);
1079 PL_beginav_save = NULL;
1082 PL_checkav_save = NULL;
1083 PL_unitcheckav = NULL;
1084 PL_unitcheckav_save = NULL;
1087 /* shortcuts just get cleared */
1090 PL_argvoutgv = NULL;
1093 PL_last_in_gv = NULL;
1104 SvREFCNT_dec(PL_envgv);
1105 SvREFCNT_dec(PL_incgv);
1106 SvREFCNT_dec(PL_argvgv);
1107 SvREFCNT_dec(PL_replgv);
1108 SvREFCNT_dec(PL_DBgv);
1109 SvREFCNT_dec(PL_DBline);
1110 SvREFCNT_dec(PL_DBsub);
1119 SvREFCNT_dec(PL_argvout_stack);
1120 PL_argvout_stack = NULL;
1122 SvREFCNT_dec(PL_modglobal);
1123 PL_modglobal = NULL;
1124 SvREFCNT_dec(PL_preambleav);
1125 PL_preambleav = NULL;
1126 SvREFCNT_dec(PL_subname);
1128 #ifdef PERL_USES_PL_PIDSTATUS
1129 SvREFCNT_dec(PL_pidstatus);
1130 PL_pidstatus = NULL;
1132 SvREFCNT_dec(PL_toptarget);
1133 PL_toptarget = NULL;
1134 SvREFCNT_dec(PL_bodytarget);
1135 PL_bodytarget = NULL;
1136 PL_formtarget = NULL;
1138 /* free locale stuff */
1139 #ifdef USE_LOCALE_COLLATE
1140 Safefree(PL_collation_name);
1141 PL_collation_name = NULL;
1143 #if defined(USE_POSIX_2008_LOCALE) \
1144 && defined(USE_THREAD_SAFE_LOCALE) \
1145 && ! defined(HAS_QUERYLOCALE)
1146 for (i = 0; i < (int) C_ARRAY_LENGTH(PL_curlocales); i++) {
1147 Safefree(PL_curlocales[i]);
1148 PL_curlocales[i] = NULL;
1151 #ifdef HAS_POSIX_2008_LOCALE
1153 /* This also makes sure we aren't using a locale object that gets freed
1155 const locale_t old_locale = uselocale(LC_GLOBAL_LOCALE);
1156 if ( old_locale != LC_GLOBAL_LOCALE
1157 # ifdef USE_POSIX_2008_LOCALE
1158 && old_locale != PL_C_locale_obj
1161 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1162 "%s:%d: Freeing %p\n", __FILE__, __LINE__, old_locale));
1163 freelocale(old_locale);
1166 # ifdef USE_LOCALE_NUMERIC
1167 if (PL_underlying_numeric_obj) {
1168 DEBUG_Lv(PerlIO_printf(Perl_debug_log,
1169 "%s:%d: Freeing %p\n", __FILE__, __LINE__,
1170 PL_underlying_numeric_obj));
1171 freelocale(PL_underlying_numeric_obj);
1172 PL_underlying_numeric_obj = (locale_t) NULL;
1176 #ifdef USE_LOCALE_NUMERIC
1177 Safefree(PL_numeric_name);
1178 PL_numeric_name = NULL;
1179 SvREFCNT_dec(PL_numeric_radix_sv);
1180 PL_numeric_radix_sv = NULL;
1183 if (PL_setlocale_buf) {
1184 Safefree(PL_setlocale_buf);
1185 PL_setlocale_buf = NULL;
1188 if (PL_langinfo_buf) {
1189 Safefree(PL_langinfo_buf);
1190 PL_langinfo_buf = NULL;
1193 /* clear character classes */
1194 #ifdef USE_LOCALE_CTYPE
1195 SvREFCNT_dec(PL_warn_locale);
1196 PL_warn_locale = NULL;
1199 if (!specialWARN(PL_compiling.cop_warnings))
1200 PerlMemShared_free(PL_compiling.cop_warnings);
1201 PL_compiling.cop_warnings = NULL;
1202 cophh_free(CopHINTHASH_get(&PL_compiling));
1203 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1204 CopFILE_free(&PL_compiling);
1206 /* Prepare to destruct main symbol table. */
1209 /* break ref loop *:: <=> %:: */
1210 (void)hv_deletes(hv, "main::", G_DISCARD);
1213 SvREFCNT_dec(PL_curstname);
1214 PL_curstname = NULL;
1216 /* clear queued errors */
1217 SvREFCNT_dec(PL_errors);
1220 SvREFCNT_dec(PL_isarev);
1223 if (destruct_level >= 2) {
1224 if (PL_scopestack_ix != 0)
1225 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1226 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1227 (long)PL_scopestack_ix);
1228 if (PL_savestack_ix != 0)
1229 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1230 "Unbalanced saves: %ld more saves than restores\n",
1231 (long)PL_savestack_ix);
1232 if (PL_tmps_floor != -1)
1233 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1234 (long)PL_tmps_floor + 1);
1235 if (cxstack_ix != -1)
1236 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1237 (long)cxstack_ix + 1);
1241 SvREFCNT_dec(PL_regex_padav);
1242 PL_regex_padav = NULL;
1243 PL_regex_pad = NULL;
1246 #ifdef PERL_IMPLICIT_CONTEXT
1247 /* the entries in this list are allocated via SV PVX's, so get freed
1248 * in sv_clean_all */
1249 Safefree(PL_my_cxt_list);
1252 /* Now absolutely destruct everything, somehow or other, loops or no. */
1254 /* the 2 is for PL_fdpid and PL_strtab */
1255 while (sv_clean_all() > 2)
1259 Safefree(PL_stashpad); /* must come after sv_clean_all */
1262 AvREAL_off(PL_fdpid); /* no surviving entries */
1263 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1266 #ifdef HAVE_INTERP_INTERN
1270 /* constant strings */
1271 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1272 SvREFCNT_dec(PL_sv_consts[i]);
1273 PL_sv_consts[i] = NULL;
1276 /* Destruct the global string table. */
1278 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1279 * so that sv_free() won't fail on them.
1280 * Now that the global string table is using a single hunk of memory
1281 * for both HE and HEK, we either need to explicitly unshare it the
1282 * correct way, or actually free things here.
1285 const I32 max = HvMAX(PL_strtab);
1286 HE * const * const array = HvARRAY(PL_strtab);
1287 HE *hent = array[0];
1290 if (hent && ckWARN_d(WARN_INTERNAL)) {
1291 HE * const next = HeNEXT(hent);
1292 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1293 "Unbalanced string table refcount: (%ld) for \"%s\"",
1294 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1301 hent = array[riter];
1306 HvARRAY(PL_strtab) = 0;
1307 HvTOTALKEYS(PL_strtab) = 0;
1309 SvREFCNT_dec(PL_strtab);
1312 /* free the pointer tables used for cloning */
1313 ptr_table_free(PL_ptr_table);
1314 PL_ptr_table = (PTR_TBL_t*)NULL;
1317 /* free special SVs */
1319 SvREFCNT(&PL_sv_yes) = 0;
1320 sv_clear(&PL_sv_yes);
1321 SvANY(&PL_sv_yes) = NULL;
1322 SvFLAGS(&PL_sv_yes) = 0;
1324 SvREFCNT(&PL_sv_no) = 0;
1325 sv_clear(&PL_sv_no);
1326 SvANY(&PL_sv_no) = NULL;
1327 SvFLAGS(&PL_sv_no) = 0;
1329 SvREFCNT(&PL_sv_zero) = 0;
1330 sv_clear(&PL_sv_zero);
1331 SvANY(&PL_sv_zero) = NULL;
1332 SvFLAGS(&PL_sv_zero) = 0;
1336 for (i=0; i<=2; i++) {
1337 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1338 sv_clear(PERL_DEBUG_PAD(i));
1339 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1340 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1344 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1345 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1347 #ifdef DEBUG_LEAKING_SCALARS
1348 if (PL_sv_count != 0) {
1353 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1354 svend = &sva[SvREFCNT(sva)];
1355 for (sv = sva + 1; sv < svend; ++sv) {
1356 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1357 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1359 " refcnt=%" UVuf pTHX__FORMAT "\n"
1360 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1361 "serial %" UVuf "\n",
1362 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1364 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1366 sv->sv_debug_inpad ? "for" : "by",
1367 sv->sv_debug_optype ?
1368 PL_op_name[sv->sv_debug_optype]: "(none)",
1369 PTR2UV(sv->sv_debug_parent),
1372 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1373 Perl_dump_sv_child(aTHX_ sv);
1379 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1383 /* Wait for up to 4 seconds for child to terminate.
1384 This seems to be the least effort way of timing out on reaping
1386 struct timeval waitfor = {4, 0};
1387 int sock = PL_dumper_fd;
1391 FD_SET(sock, &rset);
1392 select(sock + 1, &rset, NULL, NULL, &waitfor);
1393 waitpid(child, &status, WNOHANG);
1398 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1404 #if defined(PERLIO_LAYERS)
1405 /* No more IO - including error messages ! */
1406 PerlIO_cleanup(aTHX);
1409 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1410 as currently layers use it rather than NULL as a marker
1411 for no arg - and will try and SvREFCNT_dec it.
1413 SvREFCNT(&PL_sv_undef) = 0;
1414 SvREADONLY_off(&PL_sv_undef);
1416 Safefree(PL_origfilename);
1417 PL_origfilename = NULL;
1418 Safefree(PL_reg_curpm);
1419 free_tied_hv_pool();
1420 Safefree(PL_op_mask);
1421 Safefree(PL_psig_name);
1422 PL_psig_name = (SV**)NULL;
1423 PL_psig_ptr = (SV**)NULL;
1425 /* We need to NULL PL_psig_pend first, so that
1426 signal handlers know not to use it */
1427 int *psig_save = PL_psig_pend;
1428 PL_psig_pend = (int*)NULL;
1429 Safefree(psig_save);
1432 TAINTING_set(FALSE);
1433 TAINT_WARN_set(FALSE);
1434 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1436 DEBUG_P(debprofdump());
1440 #ifdef USE_REENTRANT_API
1441 Perl_reentrant_free(aTHX);
1444 /* These all point to HVs that are about to be blown away.
1445 Code in core and on CPAN assumes that if the interpreter is re-started
1446 that they will be cleanly NULL or pointing to a valid HV. */
1447 PL_custom_op_names = NULL;
1448 PL_custom_op_descs = NULL;
1449 PL_custom_ops = NULL;
1453 while (PL_regmatch_slab) {
1454 regmatch_slab *s = PL_regmatch_slab;
1455 PL_regmatch_slab = PL_regmatch_slab->next;
1459 /* As the absolutely last thing, free the non-arena SV for mess() */
1462 /* we know that type == SVt_PVMG */
1464 /* it could have accumulated taint magic */
1467 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1468 moremagic = mg->mg_moremagic;
1469 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1471 Safefree(mg->mg_ptr);
1475 /* we know that type >= SVt_PV */
1476 SvPV_free(PL_mess_sv);
1477 Safefree(SvANY(PL_mess_sv));
1478 Safefree(PL_mess_sv);
1485 =for apidoc perl_free
1487 Releases a Perl interpreter. See L<perlembed>.
1497 PERL_ARGS_ASSERT_PERL_FREE;
1499 if (PL_veto_cleanup)
1502 #ifdef PERL_TRACK_MEMPOOL
1505 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1506 * value as we're probably hunting memory leaks then
1508 if (PL_perl_destruct_level == 0) {
1509 const U32 old_debug = PL_debug;
1510 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1511 thread at thread exit. */
1513 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1514 "free this thread's memory\n");
1515 PL_debug &= ~ DEBUG_m_FLAG;
1517 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1518 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1519 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1522 PL_debug = old_debug;
1527 #if defined(WIN32) || defined(NETWARE)
1528 # if defined(PERL_IMPLICIT_SYS)
1531 void *host = nw_internal_host;
1532 PerlMem_free(aTHXx);
1533 nw_delete_internal_host(host);
1535 void *host = w32_internal_host;
1536 PerlMem_free(aTHXx);
1537 win32_delete_internal_host(host);
1541 PerlMem_free(aTHXx);
1544 PerlMem_free(aTHXx);
1548 #if defined(USE_ITHREADS)
1549 /* provide destructors to clean up the thread key when libperl is unloaded */
1550 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1552 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1553 #pragma fini "perl_fini"
1554 #elif defined(__sun) && !defined(__GNUC__)
1555 #pragma fini (perl_fini)
1559 #if defined(__GNUC__)
1560 __attribute__((destructor))
1566 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1569 PL_curinterp && !PL_veto_cleanup)
1574 #endif /* THREADS */
1577 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1579 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1580 PL_exitlist[PL_exitlistlen].fn = fn;
1581 PL_exitlist[PL_exitlistlen].ptr = ptr;
1586 =for apidoc Am|int|perl_parse|PerlInterpreter *my_perl|XSINIT_t xsinit|int argc|char **argv|char **env
1588 Tells a Perl interpreter to parse a Perl script. This performs most
1589 of the initialisation of a Perl interpreter. See L<perlembed> for
1592 C<my_perl> points to the Perl interpreter that is to parse the script.
1593 It must have been previously created through the use of L</perl_alloc>
1594 and L</perl_construct>. C<xsinit> points to a callback function that
1595 will be called to set up the ability for this Perl interpreter to load
1596 XS extensions, or may be null to perform no such setup.
1598 C<argc> and C<argv> supply a set of command-line arguments to the Perl
1599 interpreter, as would normally be passed to the C<main> function of
1600 a C program. C<argv[argc]> must be null. These arguments are where
1601 the script to parse is specified, either by naming a script file or by
1602 providing a script in a C<-e> option.
1603 If L<C<$0>|perlvar/$0> will be written to in the Perl interpreter, then
1604 the argument strings must be in writable memory, and so mustn't just be
1607 C<env> specifies a set of environment variables that will be used by
1608 this Perl interpreter. If non-null, it must point to a null-terminated
1609 array of environment strings. If null, the Perl interpreter will use
1610 the environment supplied by the C<environ> global variable.
1612 This function initialises the interpreter, and parses and compiles the
1613 script specified by the command-line arguments. This includes executing
1614 code in C<BEGIN>, C<UNITCHECK>, and C<CHECK> blocks. It does not execute
1615 C<INIT> blocks or the main program.
1617 Returns an integer of slightly tricky interpretation. The correct
1618 use of the return value is as a truth value indicating whether there
1619 was a failure in initialisation. If zero is returned, this indicates
1620 that initialisation was successful, and it is safe to proceed to call
1621 L</perl_run> and make other use of it. If a non-zero value is returned,
1622 this indicates some problem that means the interpreter wants to terminate.
1623 The interpreter should not be just abandoned upon such failure; the caller
1624 should proceed to shut the interpreter down cleanly with L</perl_destruct>
1625 and free it with L</perl_free>.
1627 For historical reasons, the non-zero return value also attempts to
1628 be a suitable value to pass to the C library function C<exit> (or to
1629 return from C<main>), to serve as an exit code indicating the nature
1630 of the way initialisation terminated. However, this isn't portable,
1631 due to differing exit code conventions. A historical bug is preserved
1632 for the time being: if the Perl built-in C<exit> is called during this
1633 function's execution, with a type of exit entailing a zero exit code
1634 under the host operating system's conventions, then this function
1635 returns zero rather than a non-zero value. This bug, [perl #2754],
1636 leads to C<perl_run> being called (and therefore C<INIT> blocks and the
1637 main program running) despite a call to C<exit>. It has been preserved
1638 because a popular module-installing module has come to rely on it and
1639 needs time to be fixed. This issue is [perl #132577], and the original
1640 bug is due to be fixed in Perl 5.30.
1645 #define SET_CURSTASH(newstash) \
1646 if (PL_curstash != newstash) { \
1647 SvREFCNT_dec(PL_curstash); \
1648 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1652 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1659 PERL_ARGS_ASSERT_PERL_PARSE;
1660 #ifndef MULTIPLICITY
1661 PERL_UNUSED_ARG(my_perl);
1663 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1665 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1667 if (s && strEQ(s, "1")) {
1668 const unsigned char *seed= PERL_HASH_SEED;
1669 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1670 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1671 while (seed < seed_end) {
1672 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1674 #ifdef PERL_HASH_RANDOMIZE_KEYS
1675 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1676 PL_HASH_RAND_BITS_ENABLED,
1677 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1679 PerlIO_printf(Perl_debug_log, "\n");
1682 #endif /* #if (defined(USE_HASH_SEED) ... */
1686 struct NameTranslationInfo nti;
1687 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1694 for(i = 0; i != argc; i++)
1696 assert(!argv[argc]);
1701 if (PL_origalen != 0) {
1702 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1705 /* Set PL_origalen be the sum of the contiguous argv[]
1706 * elements plus the size of the env in case that it is
1707 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1708 * as the maximum modifiable length of $0. In the worst case
1709 * the area we are able to modify is limited to the size of
1710 * the original argv[0]. (See below for 'contiguous', though.)
1712 const char *s = NULL;
1713 const UV mask = ~(UV)(PTRSIZE-1);
1714 /* Do the mask check only if the args seem like aligned. */
1716 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1718 /* See if all the arguments are contiguous in memory. Note
1719 * that 'contiguous' is a loose term because some platforms
1720 * align the argv[] and the envp[]. If the arguments look
1721 * like non-aligned, assume that they are 'strictly' or
1722 * 'traditionally' contiguous. If the arguments look like
1723 * aligned, we just check that they are within aligned
1724 * PTRSIZE bytes. As long as no system has something bizarre
1725 * like the argv[] interleaved with some other data, we are
1726 * fine. (Did I just evoke Murphy's Law?) --jhi */
1727 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1730 for (i = 1; i < PL_origargc; i++) {
1731 if ((PL_origargv[i] == s + 1
1733 || PL_origargv[i] == s + 2
1738 (PL_origargv[i] > s &&
1740 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1751 #ifndef PERL_USE_SAFE_PUTENV
1752 /* Can we grab env area too to be used as the area for $0? */
1753 if (s && PL_origenviron && !PL_use_safe_putenv) {
1754 if ((PL_origenviron[0] == s + 1)
1757 (PL_origenviron[0] > s &&
1758 PL_origenviron[0] <=
1759 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1763 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1764 s = PL_origenviron[0];
1767 my_setenv("NoNe SuCh", NULL);
1768 /* Force copy of environment. */
1769 for (i = 1; PL_origenviron[i]; i++) {
1770 if (PL_origenviron[i] == s + 1
1773 (PL_origenviron[i] > s &&
1774 PL_origenviron[i] <=
1775 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1778 s = PL_origenviron[i];
1786 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1788 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1793 /* Come here if running an undumped a.out. */
1795 PL_origfilename = savepv(argv[0]);
1796 PL_do_undump = FALSE;
1797 cxstack_ix = -1; /* start label stack again */
1799 assert (!TAINT_get);
1803 init_postdump_symbols(argc,argv,env);
1808 op_free(PL_main_root);
1809 PL_main_root = NULL;
1811 PL_main_start = NULL;
1812 SvREFCNT_dec(PL_main_cv);
1816 oldscope = PL_scopestack_ix;
1817 PL_dowarn = G_WARN_OFF;
1822 parse_body(env,xsinit);
1823 if (PL_unitcheckav) {
1824 call_list(oldscope, PL_unitcheckav);
1827 PERL_SET_PHASE(PERL_PHASE_CHECK);
1828 call_list(oldscope, PL_checkav);
1836 /* my_exit() was called */
1837 while (PL_scopestack_ix > oldscope)
1840 SET_CURSTASH(PL_defstash);
1841 if (PL_unitcheckav) {
1842 call_list(oldscope, PL_unitcheckav);
1845 PERL_SET_PHASE(PERL_PHASE_CHECK);
1846 call_list(oldscope, PL_checkav);
1851 * At this point we should do
1853 * to avoid [perl #2754], but that bugfix has been postponed
1854 * because of the Module::Install breakage it causes
1860 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1868 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1869 miniperl, and we need to see those flags reflected in the values here. */
1871 /* What this returns is subject to change. Use the public interface in Config.
1874 S_Internals_V(pTHX_ CV *cv)
1877 #ifdef LOCAL_PATCH_COUNT
1878 const int local_patch_count = LOCAL_PATCH_COUNT;
1880 const int local_patch_count = 0;
1882 const int entries = 3 + local_patch_count;
1884 static const char non_bincompat_options[] =
1891 # ifdef NO_HASH_SEED
1894 # ifdef NO_TAINT_SUPPORT
1897 # ifdef PERL_BOOL_AS_CHAR
1898 " PERL_BOOL_AS_CHAR"
1900 # ifdef PERL_COPY_ON_WRITE
1901 " PERL_COPY_ON_WRITE"
1903 # ifdef PERL_DISABLE_PMC
1906 # ifdef PERL_DONT_CREATE_GVSV
1907 " PERL_DONT_CREATE_GVSV"
1909 # ifdef PERL_EXTERNAL_GLOB
1910 " PERL_EXTERNAL_GLOB"
1912 # ifdef PERL_HASH_FUNC_SIPHASH
1913 " PERL_HASH_FUNC_SIPHASH"
1915 # ifdef PERL_HASH_FUNC_SDBM
1916 " PERL_HASH_FUNC_SDBM"
1918 # ifdef PERL_HASH_FUNC_DJB2
1919 " PERL_HASH_FUNC_DJB2"
1921 # ifdef PERL_HASH_FUNC_SUPERFAST
1922 " PERL_HASH_FUNC_SUPERFAST"
1924 # ifdef PERL_HASH_FUNC_MURMUR3
1925 " PERL_HASH_FUNC_MURMUR3"
1927 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1928 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1930 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1931 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1933 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1934 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1936 # ifdef PERL_IS_MINIPERL
1939 # ifdef PERL_MALLOC_WRAP
1942 # ifdef PERL_MEM_LOG
1945 # ifdef PERL_MEM_LOG_NOIMPL
1946 " PERL_MEM_LOG_NOIMPL"
1948 # ifdef PERL_OP_PARENT
1951 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1952 " PERL_PERTURB_KEYS_DETERMINISTIC"
1954 # ifdef PERL_PERTURB_KEYS_DISABLED
1955 " PERL_PERTURB_KEYS_DISABLED"
1957 # ifdef PERL_PERTURB_KEYS_RANDOM
1958 " PERL_PERTURB_KEYS_RANDOM"
1960 # ifdef PERL_PRESERVE_IVUV
1961 " PERL_PRESERVE_IVUV"
1963 # ifdef PERL_RELOCATABLE_INCPUSH
1964 " PERL_RELOCATABLE_INCPUSH"
1966 # ifdef PERL_USE_DEVEL
1969 # ifdef PERL_USE_SAFE_PUTENV
1970 " PERL_USE_SAFE_PUTENV"
1972 # ifdef SILENT_NO_TAINT_SUPPORT
1973 " SILENT_NO_TAINT_SUPPORT"
1975 # ifdef UNLINK_ALL_VERSIONS
1976 " UNLINK_ALL_VERSIONS"
1978 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1979 " USE_ATTRIBUTES_FOR_PERLIO"
1981 # ifdef USE_FAST_STDIO
1987 # ifdef USE_LOCALE_CTYPE
1990 # ifdef WIN32_NO_REGISTRY
1993 # ifdef USE_PERL_ATOF
1996 # ifdef USE_SITECUSTOMIZE
1997 " USE_SITECUSTOMIZE"
1999 # ifdef USE_THREAD_SAFE_LOCALE
2000 " USE_THREAD_SAFE_LOCALE"
2003 PERL_UNUSED_ARG(cv);
2004 PERL_UNUSED_VAR(items);
2006 EXTEND(SP, entries);
2008 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
2009 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
2010 sizeof(non_bincompat_options) - 1, SVs_TEMP));
2012 #ifndef PERL_BUILD_DATE
2015 # define PERL_BUILD_DATE __DATE__ " " __TIME__
2017 # define PERL_BUILD_DATE __DATE__
2022 #ifdef PERL_BUILD_DATE
2023 PUSHs(Perl_newSVpvn_flags(aTHX_
2024 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
2027 PUSHs(&PL_sv_undef);
2030 for (i = 1; i <= local_patch_count; i++) {
2031 /* This will be an undef, if PL_localpatches[i] is NULL. */
2032 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
2038 #define INCPUSH_UNSHIFT 0x01
2039 #define INCPUSH_ADD_OLD_VERS 0x02
2040 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
2041 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
2042 #define INCPUSH_NOT_BASEDIR 0x10
2043 #define INCPUSH_CAN_RELOCATE 0x20
2044 #define INCPUSH_ADD_SUB_DIRS \
2045 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
2048 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
2052 int argc = PL_origargc;
2053 char **argv = PL_origargv;
2054 const char *scriptname = NULL;
2055 bool dosearch = FALSE;
2057 bool doextract = FALSE;
2058 const char *cddir = NULL;
2059 #ifdef USE_SITECUSTOMIZE
2060 bool minus_f = FALSE;
2062 SV *linestr_sv = NULL;
2063 bool add_read_e_script = FALSE;
2064 U32 lex_start_flags = 0;
2066 PERL_SET_PHASE(PERL_PHASE_START);
2072 for (argc--,argv++; argc > 0; argc--,argv++) {
2073 if (argv[0][0] != '-' || !argv[0][1])
2079 #ifndef PERL_STRICT_CR
2103 if ((s = moreswitches(s)))
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');
2115 if( !TAINTING_get ) {
2116 TAINT_WARN_set(TRUE);
2123 #if defined(SILENT_NO_TAINT_SUPPORT)
2124 /* silently ignore */
2125 #elif defined(NO_TAINT_SUPPORT)
2126 Perl_croak_nocontext("This perl was compiled without taint support. "
2127 "Cowardly refusing to run with -t or -T flags");
2129 CHECK_MALLOC_TOO_LATE_FOR('T');
2131 TAINT_WARN_set(FALSE);
2140 forbid_setid('e', FALSE);
2142 PL_e_script = newSVpvs("");
2143 add_read_e_script = TRUE;
2146 sv_catpv(PL_e_script, s);
2148 sv_catpv(PL_e_script, argv[1]);
2152 Perl_croak(aTHX_ "No code specified for -%c", c);
2153 sv_catpvs(PL_e_script, "\n");
2157 #ifdef USE_SITECUSTOMIZE
2163 case 'I': /* -I handled both here and in moreswitches() */
2164 forbid_setid('I', FALSE);
2165 if (!*++s && (s=argv[1]) != NULL) {
2169 STRLEN len = strlen(s);
2170 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2173 Perl_croak(aTHX_ "No directory specified for -I");
2176 forbid_setid('S', FALSE);
2185 opts_prog = newSVpvs("use Config; Config::_V()");
2189 opts_prog = Perl_newSVpvf(aTHX_
2190 "use Config; Config::config_vars(qw%c%s%c)",
2194 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2195 /* don't look for script or read stdin */
2196 scriptname = BIT_BUCKET;
2208 if (!*++s || isSPACE(*s)) {
2212 /* catch use of gnu style long options.
2213 Both of these exit immediately. */
2214 if (strEQ(s, "version"))
2216 if (strEQ(s, "help"))
2221 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2232 #ifndef SECURE_INTERNAL_GETENV
2235 (s = PerlEnv_getenv("PERL5OPT")))
2237 /* s points to static memory in getenv(), which may be overwritten at
2238 * any time; use a mortal copy instead */
2239 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2243 if (*s == '-' && *(s+1) == 'T') {
2244 #if defined(SILENT_NO_TAINT_SUPPORT)
2245 /* silently ignore */
2246 #elif defined(NO_TAINT_SUPPORT)
2247 Perl_croak_nocontext("This perl was compiled without taint support. "
2248 "Cowardly refusing to run with -t or -T flags");
2250 CHECK_MALLOC_TOO_LATE_FOR('T');
2252 TAINT_WARN_set(FALSE);
2256 char *popt_copy = NULL;
2269 if (!strchr("CDIMUdmtwW", *s))
2270 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2274 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2275 s = popt_copy + (s - d);
2283 #if defined(SILENT_NO_TAINT_SUPPORT)
2284 /* silently ignore */
2285 #elif defined(NO_TAINT_SUPPORT)
2286 Perl_croak_nocontext("This perl was compiled without taint support. "
2287 "Cowardly refusing to run with -t or -T flags");
2289 if( !TAINTING_get) {
2290 TAINT_WARN_set(TRUE);
2302 #ifndef NO_PERL_INTERNAL_RAND_SEED
2303 /* If we're not set[ug]id, we might have honored
2304 PERL_INTERNAL_RAND_SEED in perl_construct().
2305 At this point command-line options have been parsed, so if
2306 we're now tainting and not set[ug]id re-seed.
2307 This could possibly be wasteful if PERL_INTERNAL_RAND_SEED is invalid,
2308 but avoids duplicating the logic from perl_construct().
2311 PerlProc_getuid() == PerlProc_geteuid() &&
2312 PerlProc_getgid() == PerlProc_getegid()) {
2313 Perl_drand48_init_r(&PL_internal_random_state, seed());
2317 /* Set $^X early so that it can be used for relocatable paths in @INC */
2318 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2319 assert (!TAINT_get);
2324 #if defined(USE_SITECUSTOMIZE)
2326 /* The games with local $! are to avoid setting errno if there is no
2327 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2328 ie a q() operator with a NUL byte as a the delimiter. This avoids
2329 problems with pathnames containing (say) ' */
2330 # ifdef PERL_IS_MINIPERL
2331 AV *const inc = GvAV(PL_incgv);
2332 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2335 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2336 it should be reported immediately as a build failure. */
2337 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2339 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2340 "do {local $!; -f $f }"
2341 " and do $f || die $@ || qq '$f: $!' }",
2342 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2345 /* SITELIB_EXP is a function call on Win32. */
2346 const char *const raw_sitelib = SITELIB_EXP;
2348 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2349 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2350 INCPUSH_CAN_RELOCATE);
2351 const char *const sitelib = SvPVX(sitelib_sv);
2352 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2354 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2355 0, SVfARG(sitelib), 0,
2356 0, SVfARG(sitelib), 0));
2357 assert (SvREFCNT(sitelib_sv) == 1);
2358 SvREFCNT_dec(sitelib_sv);
2365 scriptname = argv[0];
2368 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2370 else if (scriptname == NULL) {
2372 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2378 assert (!TAINT_get);
2382 bool suidscript = FALSE;
2384 rsfp = open_script(scriptname, dosearch, &suidscript);
2386 rsfp = PerlIO_stdin();
2387 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2390 validate_suid(rsfp);
2393 # if defined(SIGCHLD) || defined(SIGCLD)
2396 # define SIGCHLD SIGCLD
2398 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2399 if (sigstate == (Sighandler_t) SIG_IGN) {
2400 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2401 "Can't ignore signal CHLD, forcing to default");
2402 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2410 /* This will croak if suidscript is true, as -x cannot be used with
2412 forbid_setid('x', suidscript);
2413 /* Hence you can't get here if suidscript is true */
2415 linestr_sv = newSV_type(SVt_PV);
2416 lex_start_flags |= LEX_START_COPIED;
2417 find_beginning(linestr_sv, rsfp);
2418 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2419 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2423 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2424 CvUNIQUE_on(PL_compcv);
2426 CvPADLIST_set(PL_compcv, pad_new(0));
2428 PL_isarev = newHV();
2431 boot_core_UNIVERSAL();
2433 newXS("Internals::V", S_Internals_V, __FILE__);
2436 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2438 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2444 # ifdef HAS_SOCKS5_INIT
2445 socks5_init(argv[0]);
2451 init_predump_symbols();
2452 /* init_postdump_symbols not currently designed to be called */
2453 /* more than once (ENV isn't cleared first, for example) */
2454 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2456 init_postdump_symbols(argc,argv,env);
2458 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2459 * or explicitly in some platforms.
2460 * PL_utf8locale is conditionally turned on by
2461 * locale.c:Perl_init_i18nl10n() if the environment
2462 * look like the user wants to use UTF-8. */
2463 #if defined(__SYMBIAN32__)
2464 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2466 # ifndef PERL_IS_MINIPERL
2468 /* Requires init_predump_symbols(). */
2469 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2474 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2475 * and the default open disciplines. */
2476 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2477 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2479 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2480 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2481 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2483 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2484 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2485 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2487 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2488 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2489 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2491 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2492 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2495 sv_setpvs(sv, ":utf8\0:utf8");
2497 sv_setpvs(sv, ":utf8\0");
2500 sv_setpvs(sv, "\0:utf8");
2509 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2510 if (strEQ(s, "unsafe"))
2511 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2512 else if (strEQ(s, "safe"))
2513 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2515 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2520 lex_start(linestr_sv, rsfp, lex_start_flags);
2521 SvREFCNT_dec(linestr_sv);
2523 PL_subname = newSVpvs("main");
2525 if (add_read_e_script)
2526 filter_add(read_e_script, NULL);
2528 /* now parse the script */
2530 SETERRNO(0,SS_NORMAL);
2531 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2532 abort_execution("", PL_origfilename);
2534 CopLINE_set(PL_curcop, 0);
2535 SET_CURSTASH(PL_defstash);
2537 SvREFCNT_dec(PL_e_script);
2545 SAVECOPFILE(PL_curcop);
2546 SAVECOPLINE(PL_curcop);
2547 gv_check(PL_defstash);
2557 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2558 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2559 dump_mstats("after compilation:");
2564 PL_restartjmpenv = NULL;
2570 =for apidoc Am|int|perl_run|PerlInterpreter *my_perl
2572 Tells a Perl interpreter to run its main program. See L<perlembed>
2575 C<my_perl> points to the Perl interpreter. It must have been previously
2576 created through the use of L</perl_alloc> and L</perl_construct>, and
2577 initialised through L</perl_parse>. This function should not be called
2578 if L</perl_parse> returned a non-zero value, indicating a failure in
2579 initialisation or compilation.
2581 This function executes code in C<INIT> blocks, and then executes the
2582 main program. The code to be executed is that established by the prior
2583 call to L</perl_parse>. If the interpreter's C<PL_exit_flags> word
2584 does not have the C<PERL_EXIT_DESTRUCT_END> flag set, then this function
2585 will also execute code in C<END> blocks. If it is desired to make any
2586 further use of the interpreter after calling this function, then C<END>
2587 blocks should be postponed to L</perl_destruct> time by setting that flag.
2589 Returns an integer of slightly tricky interpretation. The correct use
2590 of the return value is as a truth value indicating whether the program
2591 terminated non-locally. If zero is returned, this indicates that
2592 the program ran to completion, and it is safe to make other use of the
2593 interpreter (provided that the C<PERL_EXIT_DESTRUCT_END> flag was set as
2594 described above). If a non-zero value is returned, this indicates that
2595 the interpreter wants to terminate early. The interpreter should not be
2596 just abandoned because of this desire to terminate; the caller should
2597 proceed to shut the interpreter down cleanly with L</perl_destruct>
2598 and free it with L</perl_free>.
2600 For historical reasons, the non-zero return value also attempts to
2601 be a suitable value to pass to the C library function C<exit> (or to
2602 return from C<main>), to serve as an exit code indicating the nature of
2603 the way the program terminated. However, this isn't portable, due to
2604 differing exit code conventions. An attempt is made to return an exit
2605 code of the type required by the host operating system, but because
2606 it is constrained to be non-zero, it is not necessarily possible to
2607 indicate every type of exit. It is only reliable on Unix, where a zero
2608 exit code can be augmented with a set bit that will be ignored. In any
2609 case, this function is not the correct place to acquire an exit code:
2610 one should get that from L</perl_destruct>.
2622 PERL_ARGS_ASSERT_PERL_RUN;
2623 #ifndef MULTIPLICITY
2624 PERL_UNUSED_ARG(my_perl);
2627 oldscope = PL_scopestack_ix;
2635 cxstack_ix = -1; /* start context stack again */
2637 case 0: /* normal completion */
2641 case 2: /* my_exit() */
2642 while (PL_scopestack_ix > oldscope)
2645 SET_CURSTASH(PL_defstash);
2646 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2647 PL_endav && !PL_minus_c) {
2648 PERL_SET_PHASE(PERL_PHASE_END);
2649 call_list(oldscope, PL_endav);
2652 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2653 dump_mstats("after execution: ");
2659 POPSTACK_TO(PL_mainstack);
2662 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2673 S_run_body(pTHX_ I32 oldscope)
2675 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2676 PL_sawampersand ? "Enabling" : "Omitting",
2677 (unsigned int)(PL_sawampersand)));
2679 if (!PL_restartop) {
2681 if (DEBUG_x_TEST || DEBUG_B_TEST)
2682 dump_all_perl(!DEBUG_B_TEST);
2684 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2688 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2691 if (PERLDB_SINGLE && PL_DBsingle)
2694 PERL_SET_PHASE(PERL_PHASE_INIT);
2695 call_list(oldscope, PL_initav);
2697 #ifdef PERL_DEBUG_READONLY_OPS
2698 if (PL_main_root && PL_main_root->op_slabbed)
2699 Slab_to_ro(OpSLAB(PL_main_root));
2705 PERL_SET_PHASE(PERL_PHASE_RUN);
2708 PL_restartjmpenv = NULL;
2709 PL_op = PL_restartop;
2713 else if (PL_main_start) {
2714 CvDEPTH(PL_main_cv) = 1;
2715 PL_op = PL_main_start;
2719 NOT_REACHED; /* NOTREACHED */
2723 =head1 SV Manipulation Functions
2725 =for apidoc p||get_sv
2727 Returns the SV of the specified Perl scalar. C<flags> are passed to
2728 C<gv_fetchpv>. If C<GV_ADD> is set and the
2729 Perl variable does not exist then it will be created. If C<flags> is zero
2730 and the variable does not exist then NULL is returned.
2736 Perl_get_sv(pTHX_ const char *name, I32 flags)
2740 PERL_ARGS_ASSERT_GET_SV;
2742 gv = gv_fetchpv(name, flags, SVt_PV);
2749 =head1 Array Manipulation Functions
2751 =for apidoc p||get_av
2753 Returns the AV of the specified Perl global or package array with the given
2754 name (so it won't work on lexical variables). C<flags> are passed
2755 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2756 Perl variable does not exist then it will be created. If C<flags> is zero
2757 and the variable does not exist then NULL is returned.
2759 Perl equivalent: C<@{"$name"}>.
2765 Perl_get_av(pTHX_ const char *name, I32 flags)
2767 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2769 PERL_ARGS_ASSERT_GET_AV;
2779 =head1 Hash Manipulation Functions
2781 =for apidoc p||get_hv
2783 Returns the HV of the specified Perl hash. C<flags> are passed to
2784 C<gv_fetchpv>. If C<GV_ADD> is set and the
2785 Perl variable does not exist then it will be created. If C<flags> is zero
2786 and the variable does not exist then C<NULL> is returned.
2792 Perl_get_hv(pTHX_ const char *name, I32 flags)
2794 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2796 PERL_ARGS_ASSERT_GET_HV;
2806 =head1 CV Manipulation Functions
2808 =for apidoc p||get_cvn_flags
2810 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2811 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2812 exist then it will be declared (which has the same effect as saying
2813 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2814 then NULL is returned.
2816 =for apidoc p||get_cv
2818 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2824 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2826 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2828 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2830 if (gv && UNLIKELY(SvROK(gv)) && SvTYPE(SvRV((SV *)gv)) == SVt_PVCV)
2831 return (CV*)SvRV((SV *)gv);
2833 /* XXX this is probably not what they think they're getting.
2834 * It has the same effect as "sub name;", i.e. just a forward
2836 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2837 return newSTUB(gv,0);
2844 /* Nothing in core calls this now, but we can't replace it with a macro and
2845 move it to mathoms.c as a macro would evaluate name twice. */
2847 Perl_get_cv(pTHX_ const char *name, I32 flags)
2849 PERL_ARGS_ASSERT_GET_CV;
2851 return get_cvn_flags(name, strlen(name), flags);
2854 /* Be sure to refetch the stack pointer after calling these routines. */
2858 =head1 Callback Functions
2860 =for apidoc p||call_argv
2862 Performs a callback to the specified named and package-scoped Perl subroutine
2863 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2866 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2872 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2874 /* See G_* flags in cop.h */
2875 /* null terminated arg list */
2879 PERL_ARGS_ASSERT_CALL_ARGV;
2883 mXPUSHs(newSVpv(*argv,0));
2887 return call_pv(sub_name, flags);
2891 =for apidoc p||call_pv
2893 Performs a callback to the specified Perl sub. See L<perlcall>.
2899 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2900 /* name of the subroutine */
2901 /* See G_* flags in cop.h */
2903 PERL_ARGS_ASSERT_CALL_PV;
2905 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2909 =for apidoc p||call_method
2911 Performs a callback to the specified Perl method. The blessed object must
2912 be on the stack. See L<perlcall>.
2918 Perl_call_method(pTHX_ const char *methname, I32 flags)
2919 /* name of the subroutine */
2920 /* See G_* flags in cop.h */
2924 PERL_ARGS_ASSERT_CALL_METHOD;
2926 len = strlen(methname);
2927 sv = flags & G_METHOD_NAMED
2928 ? sv_2mortal(newSVpvn_share(methname, len,0))
2929 : newSVpvn_flags(methname, len, SVs_TEMP);
2931 return call_sv(sv, flags | G_METHOD);
2934 /* May be called with any of a CV, a GV, or an SV containing the name. */
2936 =for apidoc p||call_sv
2938 Performs a callback to the Perl sub specified by the SV.
2940 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2941 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2942 or C<SvPV(sv)> will be used as the name of the sub to call.
2944 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2945 C<SvPV(sv)> will be used as the name of the method to call.
2947 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2948 the name of the method to call.
2950 Some other values are treated specially for internal use and should
2959 Perl_call_sv(pTHX_ SV *sv, volatile I32 flags)
2960 /* See G_* flags in cop.h */
2963 LOGOP myop; /* fake syntax tree node */
2966 volatile I32 retval = 0;
2967 bool oldcatch = CATCH_GET;
2969 OP* const oldop = PL_op;
2972 PERL_ARGS_ASSERT_CALL_SV;
2974 if (flags & G_DISCARD) {
2978 if (!(flags & G_WANT)) {
2979 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2984 Zero(&myop, 1, LOGOP);
2985 if (!(flags & G_NOARGS))
2986 myop.op_flags |= OPf_STACKED;
2987 myop.op_flags |= OP_GIMME_REVERSE(flags);
2991 if (!(flags & G_METHOD_NAMED)) {
2999 if (PERLDB_SUB && PL_curstash != PL_debstash
3000 /* Handle first BEGIN of -d. */
3001 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
3002 /* Try harder, since this may have been a sighandler, thus
3003 * curstash may be meaningless. */
3004 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
3005 && !(flags & G_NODEBUG))
3006 myop.op_private |= OPpENTERSUB_DB;
3008 if (flags & (G_METHOD|G_METHOD_NAMED)) {
3009 Zero(&method_op, 1, METHOP);
3010 method_op.op_next = (OP*)&myop;
3011 PL_op = (OP*)&method_op;
3012 if ( flags & G_METHOD_NAMED ) {
3013 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
3014 method_op.op_type = OP_METHOD_NAMED;
3015 method_op.op_u.op_meth_sv = sv;
3017 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
3018 method_op.op_type = OP_METHOD;
3020 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
3021 myop.op_type = OP_ENTERSUB;
3024 if (!(flags & G_EVAL)) {
3026 CALL_BODY_SUB((OP*)&myop);
3027 retval = PL_stack_sp - (PL_stack_base + oldmark);
3028 CATCH_SET(oldcatch);
3032 myop.op_other = (OP*)&myop;
3034 old_cxix = cxstack_ix;
3035 create_eval_scope(NULL, flags|G_FAKINGEVAL);
3043 CALL_BODY_SUB((OP*)&myop);
3044 retval = PL_stack_sp - (PL_stack_base + oldmark);
3045 if (!(flags & G_KEEPERR)) {
3053 /* my_exit() was called */
3054 SET_CURSTASH(PL_defstash);
3058 NOT_REACHED; /* NOTREACHED */
3061 PL_restartjmpenv = NULL;
3062 PL_op = PL_restartop;
3066 PL_stack_sp = PL_stack_base + oldmark;
3067 if ((flags & G_WANT) == G_ARRAY)
3071 *++PL_stack_sp = &PL_sv_undef;
3076 /* if we croaked, depending on how we croaked the eval scope
3077 * may or may not have already been popped */
3078 if (cxstack_ix > old_cxix) {
3079 assert(cxstack_ix == old_cxix + 1);
3080 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
3081 delete_eval_scope();
3086 if (flags & G_DISCARD) {
3087 PL_stack_sp = PL_stack_base + oldmark;
3096 /* Eval a string. The G_EVAL flag is always assumed. */
3099 =for apidoc p||eval_sv
3101 Tells Perl to C<eval> the string in the SV. It supports the same flags
3102 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
3108 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
3110 /* See G_* flags in cop.h */
3113 UNOP myop; /* fake syntax tree node */
3114 volatile I32 oldmark;
3115 volatile I32 retval = 0;
3117 OP* const oldop = PL_op;
3120 PERL_ARGS_ASSERT_EVAL_SV;
3122 if (flags & G_DISCARD) {
3129 Zero(&myop, 1, UNOP);
3132 oldmark = SP - PL_stack_base;
3138 if (!(flags & G_NOARGS))
3139 myop.op_flags = OPf_STACKED;
3140 myop.op_type = OP_ENTEREVAL;
3141 myop.op_flags |= OP_GIMME_REVERSE(flags);
3142 if (flags & G_KEEPERR)
3143 myop.op_flags |= OPf_SPECIAL;
3145 if (flags & G_RE_REPARSING)
3146 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
3148 /* fail now; otherwise we could fail after the JMPENV_PUSH but
3149 * before a cx_pusheval(), which corrupts the stack after a croak */
3150 TAINT_PROPER("eval_sv()");
3156 if (PL_op == (OP*)(&myop)) {
3157 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
3159 goto fail; /* failed in compilation */
3162 retval = PL_stack_sp - (PL_stack_base + oldmark);
3163 if (!(flags & G_KEEPERR)) {
3171 /* my_exit() was called */
3172 SET_CURSTASH(PL_defstash);
3176 NOT_REACHED; /* NOTREACHED */
3179 PL_restartjmpenv = NULL;
3180 PL_op = PL_restartop;
3185 PL_stack_sp = PL_stack_base + oldmark;
3186 if ((flags & G_WANT) == G_ARRAY)
3190 *++PL_stack_sp = &PL_sv_undef;
3196 if (flags & G_DISCARD) {
3197 PL_stack_sp = PL_stack_base + oldmark;
3207 =for apidoc p||eval_pv
3209 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3215 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3217 SV* sv = newSVpv(p, 0);
3219 PERL_ARGS_ASSERT_EVAL_PV;
3221 eval_sv(sv, G_SCALAR);
3230 /* just check empty string or undef? */
3231 if (croak_on_error) {
3232 SV * const errsv = ERRSV;
3233 if(SvTRUE_NN(errsv))
3234 /* replace with croak_sv? */
3235 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3241 /* Require a module. */
3244 =head1 Embedding Functions
3246 =for apidoc p||require_pv
3248 Tells Perl to C<require> the file named by the string argument. It is
3249 analogous to the Perl code C<eval "require '$file'">. It's even
3250 implemented that way; consider using load_module instead.
3255 Perl_require_pv(pTHX_ const char *pv)
3260 PERL_ARGS_ASSERT_REQUIRE_PV;
3262 PUSHSTACKi(PERLSI_REQUIRE);
3263 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3264 eval_sv(sv_2mortal(sv), G_DISCARD);
3269 S_usage(pTHX) /* XXX move this out into a module ? */
3271 /* This message really ought to be max 23 lines.
3272 * Removed -h because the user already knows that option. Others? */
3274 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3275 minimum of 509 character string literals. */
3276 static const char * const usage_msg[] = {
3277 " -0[octal] specify record separator (\\0, if no argument)\n"
3278 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3279 " -C[number/list] enables the listed Unicode features\n"
3280 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3281 " -d[:debugger] run program under debugger\n"
3282 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3283 " -e program one line of program (several -e's allowed, omit programfile)\n"
3284 " -E program like -e, but enables all optional features\n"
3285 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3286 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3287 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3288 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3289 " -l[octal] enable line ending processing, specifies line terminator\n"
3290 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3291 " -n assume \"while (<>) { ... }\" loop around program\n"
3292 " -p assume loop like -n but print line also, like sed\n"
3293 " -s enable rudimentary parsing for switches after programfile\n"
3294 " -S look for programfile using PATH environment variable\n",
3295 " -t enable tainting warnings\n"
3296 " -T enable tainting checks\n"
3297 " -u dump core after parsing program\n"
3298 " -U allow unsafe operations\n"
3299 " -v print version, patchlevel and license\n"
3300 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3301 " -w enable many useful warnings\n"
3302 " -W enable all warnings\n"
3303 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3304 " -X disable all warnings\n"
3306 "Run 'perldoc perl' for more help with Perl.\n\n",
3309 const char * const *p = usage_msg;
3310 PerlIO *out = PerlIO_stdout();
3313 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3316 PerlIO_puts(out, *p++);
3320 /* convert a string of -D options (or digits) into an int.
3321 * sets *s to point to the char after the options */
3325 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3327 static const char * const usage_msgd[] = {
3328 " Debugging flag values: (see also -d)\n"
3329 " p Tokenizing and parsing (with v, displays parse stack)\n"
3330 " s Stack snapshots (with v, displays all stacks)\n"
3331 " l Context (loop) stack processing\n"
3332 " t Trace execution\n"
3333 " o Method and overloading resolution\n",
3334 " c String/numeric conversions\n"
3335 " P Print profiling info, source file input state\n"
3336 " m Memory and SV allocation\n"
3337 " f Format processing\n"
3338 " r Regular expression parsing and execution\n"
3339 " x Syntax tree dump\n",
3340 " u Tainting checks\n"
3341 " H Hash dump -- usurps values()\n"
3342 " X Scratchpad allocation\n"
3344 " S Op slab allocation\n"
3346 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3347 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3348 " v Verbose: use in conjunction with other flags\n"
3349 " C Copy On Write\n"
3350 " A Consistency checks on internal structures\n"
3351 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3352 " M trace smart match resolution\n"
3353 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3354 " L trace some locale setting information--for Perl core development\n",
3355 " i trace PerlIO layer processing\n",
3360 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3363 /* if adding extra options, remember to update DEBUG_MASK */
3364 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3366 for (; isWORDCHAR(**s); (*s)++) {
3367 const char * const d = strchr(debopts,**s);
3369 uv |= 1 << (d - debopts);
3370 else if (ckWARN_d(WARN_DEBUGGING))
3371 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3372 "invalid option -D%c, use -D'' to see choices\n", **s);
3375 else if (isDIGIT(**s)) {
3376 const char* e = *s + strlen(*s);
3377 if (grok_atoUV(*s, &uv, &e))
3379 for (; isWORDCHAR(**s); (*s)++) ;
3381 else if (givehelp) {
3382 const char *const *p = usage_msgd;
3383 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3385 return (int)uv; /* ignore any UV->int conversion loss */
3389 /* This routine handles any switches that can be given during run */
3392 Perl_moreswitches(pTHX_ const char *s)
3396 const char option = *s; /* used to remember option in -m/-M code */
3398 PERL_ARGS_ASSERT_MORESWITCHES;
3406 SvREFCNT_dec(PL_rs);
3407 if (s[1] == 'x' && s[2]) {
3408 const char *e = s+=2;
3414 flags = PERL_SCAN_SILENT_ILLDIGIT;
3415 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3416 if (s + numlen < e) {
3417 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3421 PL_rs = newSVpvs("");
3422 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3423 uvchr_to_utf8(tmps, rschar);
3424 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3429 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3430 if (rschar & ~((U8)~0))
3431 PL_rs = &PL_sv_undef;
3432 else if (!rschar && numlen >= 2)
3433 PL_rs = newSVpvs("");
3435 char ch = (char)rschar;
3436 PL_rs = newSVpvn(&ch, 1);
3439 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3444 PL_unicode = parse_unicode_opts( (const char **)&s );
3445 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3453 while (*s && !isSPACE(*s)) ++s;
3454 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3466 forbid_setid('d', FALSE);
3469 /* -dt indicates to the debugger that threads will be used */
3470 if (*s == 't' && !isWORDCHAR(s[1])) {
3472 my_setenv("PERL5DB_THREADED", "1");
3475 /* The following permits -d:Mod to accepts arguments following an =
3476 in the fashion that -MSome::Mod does. */
3477 if (*s == ':' || *s == '=') {
3484 sv = newSVpvs("no Devel::");
3486 sv = newSVpvs("use Devel::");
3490 end = s + strlen(s);
3492 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3493 while(isWORDCHAR(*s) || *s==':') ++s;
3495 sv_catpvn(sv, start, end - start);
3497 sv_catpvn(sv, start, s-start);
3498 /* Don't use NUL as q// delimiter here, this string goes in the
3500 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3503 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3507 PL_perldb = PERLDB_ALL;
3514 forbid_setid('D', FALSE);
3516 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3517 #else /* !DEBUGGING */
3518 if (ckWARN_d(WARN_DEBUGGING))
3519 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3520 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3521 for (s++; isWORDCHAR(*s); s++) ;
3524 NOT_REACHED; /* NOTREACHED */
3528 NOT_REACHED; /* NOTREACHED */
3531 Safefree(PL_inplace);
3533 const char * const start = ++s;
3534 while (*s && !isSPACE(*s))
3537 PL_inplace = savepvn(start, s - start);
3540 case 'I': /* -I handled both here and in parse_body() */
3541 forbid_setid('I', FALSE);
3543 while (*s && isSPACE(*s))
3548 /* ignore trailing spaces (possibly followed by other switches) */
3550 for (e = p; *e && !isSPACE(*e); e++) ;
3554 } while (*p && *p != '-');
3556 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3562 Perl_croak(aTHX_ "No directory specified for -I");
3568 SvREFCNT_dec(PL_ors_sv);
3574 PL_ors_sv = newSVpvs("\n");
3575 numlen = 3 + (*s == '0');
3576 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3580 if (RsPARA(PL_rs)) {
3581 PL_ors_sv = newSVpvs("\n\n");
3584 PL_ors_sv = newSVsv(PL_rs);
3589 forbid_setid('M', FALSE); /* XXX ? */
3592 forbid_setid('m', FALSE); /* XXX ? */
3597 const char *use = "use ";
3599 /* -M-foo == 'no foo' */
3600 /* Leading space on " no " is deliberate, to make both
3601 possibilities the same length. */
3602 if (*s == '-') { use = " no "; ++s; }
3603 sv = newSVpvn(use,4);
3605 /* We allow -M'Module qw(Foo Bar)' */
3606 while(isWORDCHAR(*s) || *s==':') {
3615 Perl_croak(aTHX_ "Module name required with -%c option",
3618 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3619 "contains single ':'",
3620 (int)(s - start), start, option);
3621 end = s + strlen(s);
3623 sv_catpvn(sv, start, end - start);
3624 if (option == 'm') {
3626 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3627 sv_catpvs( sv, " ()");
3630 sv_catpvn(sv, start, s-start);
3631 /* Use NUL as q''-delimiter. */
3632 sv_catpvs(sv, " split(/,/,q\0");
3634 sv_catpvn(sv, s, end - s);
3635 sv_catpvs(sv, "\0)");
3638 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3641 Perl_croak(aTHX_ "Missing argument to -%c", option);
3652 forbid_setid('s', FALSE);
3653 PL_doswitches = TRUE;
3658 #if defined(SILENT_NO_TAINT_SUPPORT)
3659 /* silently ignore */
3660 #elif defined(NO_TAINT_SUPPORT)
3661 Perl_croak_nocontext("This perl was compiled without taint support. "
3662 "Cowardly refusing to run with -t or -T flags");
3670 PL_do_undump = TRUE;
3680 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3681 PL_dowarn |= G_WARN_ON;
3686 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3687 if (!specialWARN(PL_compiling.cop_warnings))
3688 PerlMemShared_free(PL_compiling.cop_warnings);
3689 PL_compiling.cop_warnings = pWARN_ALL ;
3693 PL_dowarn = G_WARN_ALL_OFF;
3694 if (!specialWARN(PL_compiling.cop_warnings))
3695 PerlMemShared_free(PL_compiling.cop_warnings);
3696 PL_compiling.cop_warnings = pWARN_NONE ;
3703 if (s[0] == '-') /* Additional switches on #! line. */
3708 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3714 #ifdef ALTERNATE_SHEBANG
3715 case 'S': /* OS/2 needs -S on "extproc" line. */
3718 case 'e': case 'f': case 'x': case 'E':
3719 #ifndef ALTERNATE_SHEBANG
3723 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3726 "Unrecognized switch: -%.1s (-h will show valid options)",s
3736 PerlIO * PIO_stdout;
3738 const char * const level_str = "v" PERL_VERSION_STRING;
3739 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3740 #ifdef PERL_PATCHNUM
3742 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3743 static const char num [] = PERL_PATCHNUM "*";
3745 static const char num [] = PERL_PATCHNUM;
3748 const STRLEN num_len = sizeof(num)-1;
3749 /* A very advanced compiler would fold away the strnEQ
3750 and this whole conditional, but most (all?) won't do it.
3751 SV level could also be replaced by with preprocessor
3754 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3755 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3756 of the interp so it might contain format characters
3758 level = newSVpvn(num, num_len);
3760 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3764 SV* level = newSVpvn(level_str, level_len);
3765 #endif /* #ifdef PERL_PATCHNUM */
3766 PIO_stdout = PerlIO_stdout();
3767 PerlIO_printf(PIO_stdout,
3768 "\nThis is perl " STRINGIFY(PERL_REVISION)
3769 ", version " STRINGIFY(PERL_VERSION)
3770 ", subversion " STRINGIFY(PERL_SUBVERSION)
3771 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3773 SvREFCNT_dec_NN(level);
3775 #if defined(LOCAL_PATCH_COUNT)
3776 if (LOCAL_PATCH_COUNT > 0)
3777 PerlIO_printf(PIO_stdout,
3778 "\n(with %d registered patch%s, "
3779 "see perl -V for more detail)",
3781 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3784 PerlIO_printf(PIO_stdout,
3785 "\n\nCopyright 1987-2019, Larry Wall\n");
3787 PerlIO_printf(PIO_stdout,
3788 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3791 PerlIO_printf(PIO_stdout,
3792 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3793 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3796 PerlIO_printf(PIO_stdout,
3797 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3798 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3801 PerlIO_printf(PIO_stdout,
3802 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3805 PerlIO_printf(PIO_stdout,
3806 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3809 PerlIO_printf(PIO_stdout,
3810 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3813 PerlIO_printf(PIO_stdout,
3814 "WINCE port by Rainer Keuchel, 2001-2002\n"
3815 "Built on " __DATE__ " " __TIME__ "\n\n");
3818 #ifdef __SYMBIAN32__
3819 PerlIO_printf(PIO_stdout,
3820 "Symbian port by Nokia, 2004-2005\n");
3822 #ifdef BINARY_BUILD_NOTICE
3823 BINARY_BUILD_NOTICE;
3825 PerlIO_printf(PIO_stdout,
3827 Perl may be copied only under the terms of either the Artistic License or the\n\
3828 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3829 Complete documentation for Perl, including FAQ lists, should be found on\n\
3830 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3831 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3835 /* compliments of Tom Christiansen */
3837 /* unexec() can be found in the Gnu emacs distribution */
3838 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3841 #include <lib$routines.h>
3845 Perl_my_unexec(pTHX)
3848 SV * prog = newSVpv(BIN_EXP, 0);
3849 SV * file = newSVpv(PL_origfilename, 0);
3853 sv_catpvs(prog, "/perl");
3854 sv_catpvs(file, ".perldump");
3856 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3857 /* unexec prints msg to stderr in case of failure */
3858 PerlProc_exit(status);
3860 PERL_UNUSED_CONTEXT;
3862 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3863 # elif defined(WIN32) || defined(__CYGWIN__)
3864 Perl_croak_nocontext("dump is not supported");
3866 ABORT(); /* for use with undump */
3871 /* initialize curinterp */
3876 # define PERLVAR(prefix,var,type)
3877 # define PERLVARA(prefix,var,n,type)
3878 # if defined(PERL_IMPLICIT_CONTEXT)
3879 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3880 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3882 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3883 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3885 # include "intrpvar.h"
3891 # define PERLVAR(prefix,var,type)
3892 # define PERLVARA(prefix,var,n,type)
3893 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3894 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3895 # include "intrpvar.h"
3905 S_init_main_stash(pTHX)
3910 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(hv);
3911 /* We know that the string "main" will be in the global shared string
3912 table, so it's a small saving to use it rather than allocate another
3914 PL_curstname = newSVpvs_share("main");
3915 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3916 /* If we hadn't caused another reference to "main" to be in the shared
3917 string table above, then it would be worth reordering these two,
3918 because otherwise all we do is delete "main" from it as a consequence
3919 of the SvREFCNT_dec, only to add it again with hv_name_set */
3920 SvREFCNT_dec(GvHV(gv));
3921 hv_name_sets(PL_defstash, "main", 0);
3922 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3924 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3926 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3927 GvMULTI_on(PL_incgv);
3928 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3929 SvREFCNT_inc_simple_void(PL_hintgv);
3930 GvMULTI_on(PL_hintgv);
3931 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3932 SvREFCNT_inc_simple_void(PL_defgv);
3933 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3934 SvREFCNT_inc_simple_void(PL_errgv);
3935 GvMULTI_on(PL_errgv);
3936 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3937 SvREFCNT_inc_simple_void(PL_replgv);
3938 GvMULTI_on(PL_replgv);
3939 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3940 #ifdef PERL_DONT_CREATE_GVSV
3941 (void)gv_SVadd(PL_errgv);
3943 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3945 CopSTASH_set(&PL_compiling, PL_defstash);
3946 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3947 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3949 /* We must init $/ before switches are processed. */
3950 sv_setpvs(get_sv("/", GV_ADD), "\n");
3954 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3957 PerlIO *rsfp = NULL;
3961 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3964 PL_origfilename = savepvs("-e");
3969 /* if find_script() returns, it returns a malloc()-ed value */
3970 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3971 s = scriptname + strlen(scriptname);
3973 if (strBEGINs(scriptname, "/dev/fd/")
3974 && isDIGIT(scriptname[8])
3975 && grok_atoUV(scriptname + 8, &uv, &s)
3976 && uv <= PERL_INT_MAX
3981 * Tell apart "normal" usage of fdscript, e.g.
3982 * with bash on FreeBSD:
3983 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3984 * from usage in suidperl.
3985 * Does any "normal" usage leave garbage after the number???
3986 * Is it a mistake to use a similar /dev/fd/ construct for
3991 * Be supersafe and do some sanity-checks.
3992 * Still, can we be sure we got the right thing?
3995 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3998 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
4000 scriptname = savepv(s + 1);
4001 Safefree(PL_origfilename);
4002 PL_origfilename = (char *)scriptname;
4007 CopFILE_free(PL_curcop);
4008 CopFILE_set(PL_curcop, PL_origfilename);
4009 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
4010 scriptname = (char *)"";
4011 if (fdscript >= 0) {
4012 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
4014 else if (!*scriptname) {
4015 forbid_setid(0, *suidscript);
4019 #ifdef FAKE_BIT_BUCKET
4020 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
4021 * is called) and still have the "-e" work. (Believe it or not,
4022 * a /dev/null is required for the "-e" to work because source
4023 * filter magic is used to implement it. ) This is *not* a general
4024 * replacement for a /dev/null. What we do here is create a temp
4025 * file (an empty file), open up that as the script, and then
4026 * immediately close and unlink it. Close enough for jazz. */
4027 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
4028 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
4029 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
4030 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
4031 FAKE_BIT_BUCKET_TEMPLATE
4033 const char * const err = "Failed to create a fake bit bucket";
4034 if (strEQ(scriptname, BIT_BUCKET)) {
4035 int tmpfd = Perl_my_mkstemp_cloexec(tmpname);
4037 scriptname = tmpname;
4040 Perl_croak(aTHX_ err);
4043 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
4044 #ifdef FAKE_BIT_BUCKET
4045 if ( strBEGINs(scriptname, FAKE_BIT_BUCKET_PREFIX)
4046 && strlen(scriptname) == sizeof(tmpname) - 1)
4050 scriptname = BIT_BUCKET;
4054 /* PSz 16 Sep 03 Keep neat error message */
4056 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
4058 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4059 CopFILE(PL_curcop), Strerror(errno));
4061 fd = PerlIO_fileno(rsfp);
4064 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
4065 && S_ISDIR(tmpstatbuf.st_mode)))
4066 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4073 /* In the days of suidperl, we refused to execute a setuid script stored on
4074 * a filesystem mounted nosuid and/or noexec. This meant that we probed for the
4075 * existence of the appropriate filesystem-statting function, and behaved
4076 * accordingly. But even though suidperl is long gone, we must still include
4077 * those probes for the benefit of modules like Filesys::Df, which expect the
4078 * results of those probes to be stored in %Config; see RT#126368. So mention
4079 * the relevant cpp symbols here, to ensure that metaconfig will include their
4080 * probes in the generated Configure:
4082 * I_SYSSTATVFS HAS_FSTATVFS
4084 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
4085 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
4089 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4090 /* Don't even need this function. */
4093 S_validate_suid(pTHX_ PerlIO *rsfp)
4095 const Uid_t my_uid = PerlProc_getuid();
4096 const Uid_t my_euid = PerlProc_geteuid();
4097 const Gid_t my_gid = PerlProc_getgid();
4098 const Gid_t my_egid = PerlProc_getegid();
4100 PERL_ARGS_ASSERT_VALIDATE_SUID;
4102 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
4104 int fd = PerlIO_fileno(rsfp);
4106 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
4107 Perl_croak_nocontext( "Illegal suidscript");
4109 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
4111 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
4114 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4115 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4116 /* not set-id, must be wrapped */
4119 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4122 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4127 PERL_ARGS_ASSERT_FIND_BEGINNING;
4129 /* skip forward in input to the real script? */
4132 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4133 Perl_croak(aTHX_ "No Perl script found in input\n");
4135 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
4136 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4137 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4139 while (*s == ' ' || *s == '\t') s++;
4141 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4142 || s2[-1] == '_') s2--;
4143 if (strBEGINs(s2-4,"perl"))
4144 while ((s = moreswitches(s)))
4153 /* no need to do anything here any more if we don't
4155 #ifndef NO_TAINT_SUPPORT
4156 const Uid_t my_uid = PerlProc_getuid();
4157 const Uid_t my_euid = PerlProc_geteuid();
4158 const Gid_t my_gid = PerlProc_getgid();
4159 const Gid_t my_egid = PerlProc_getegid();
4161 PERL_UNUSED_CONTEXT;
4163 /* Should not happen: */
4164 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
4165 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
4169 * Should go by suidscript, not uid!=euid: why disallow
4170 * system("ls") in scripts run from setuid things?
4171 * Or, is this run before we check arguments and set suidscript?
4172 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4173 * (We never have suidscript, can we be sure to have fdscript?)
4174 * Or must then go by UID checks? See comments in forbid_setid also.
4178 /* This is used very early in the lifetime of the program,
4179 * before even the options are parsed, so PL_tainting has
4180 * not been initialized properly. */
4182 Perl_doing_taint(int argc, char *argv[], char *envp[])
4184 #ifndef PERL_IMPLICIT_SYS
4185 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4186 * before we have an interpreter-- and the whole point of this
4187 * function is to be called at such an early stage. If you are on
4188 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4189 * "tainted because running with altered effective ids', you'll
4190 * have to add your own checks somewhere in here. The two most
4191 * known samples of 'implicitness' are Win32 and NetWare, neither
4192 * of which has much of concept of 'uids'. */
4193 Uid_t uid = PerlProc_getuid();
4194 Uid_t euid = PerlProc_geteuid();
4195 Gid_t gid = PerlProc_getgid();
4196 Gid_t egid = PerlProc_getegid();
4203 if (uid && (euid != uid || egid != gid))
4205 #endif /* !PERL_IMPLICIT_SYS */
4206 /* This is a really primitive check; environment gets ignored only
4207 * if -T are the first chars together; otherwise one gets
4208 * "Too late" message. */
4209 if ( argc > 1 && argv[1][0] == '-'
4210 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4215 /* Passing the flag as a single char rather than a string is a slight space
4216 optimisation. The only message that isn't /^-.$/ is
4217 "program input from stdin", which is substituted in place of '\0', which
4218 could never be a command line flag. */
4220 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4222 char string[3] = "-x";
4223 const char *message = "program input from stdin";
4225 PERL_UNUSED_CONTEXT;
4231 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4232 if (PerlProc_getuid() != PerlProc_geteuid())
4233 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4234 if (PerlProc_getgid() != PerlProc_getegid())
4235 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4236 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4238 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4242 Perl_init_dbargs(pTHX)
4244 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4249 /* Someone has already created it.
4250 It might have entries, and if we just turn off AvREAL(), they will
4251 "leak" until global destruction. */
4253 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4254 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4256 AvREIFY_only(PL_dbargs);
4260 Perl_init_debugger(pTHX)
4262 HV * const ostash = PL_curstash;
4265 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4267 Perl_init_dbargs(aTHX);
4268 PL_DBgv = MUTABLE_GV(
4269 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4271 PL_DBline = MUTABLE_GV(
4272 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4274 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4275 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4277 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4278 if (!SvIOK(PL_DBsingle))
4279 sv_setiv(PL_DBsingle, 0);
4280 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4281 mg->mg_private = DBVARMG_SINGLE;
4282 SvSETMAGIC(PL_DBsingle);
4284 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4285 if (!SvIOK(PL_DBtrace))
4286 sv_setiv(PL_DBtrace, 0);
4287 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4288 mg->mg_private = DBVARMG_TRACE;
4289 SvSETMAGIC(PL_DBtrace);
4291 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4292 if (!SvIOK(PL_DBsignal))
4293 sv_setiv(PL_DBsignal, 0);
4294 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4295 mg->mg_private = DBVARMG_SIGNAL;
4296 SvSETMAGIC(PL_DBsignal);
4298 SvREFCNT_dec(PL_curstash);
4299 PL_curstash = ostash;
4302 #ifndef STRESS_REALLOC
4303 #define REASONABLE(size) (size)
4304 #define REASONABLE_but_at_least(size,min) (size)
4306 #define REASONABLE(size) (1) /* unreasonable */
4307 #define REASONABLE_but_at_least(size,min) (min)
4311 Perl_init_stacks(pTHX)
4315 /* start with 128-item stack and 8K cxstack */
4316 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4317 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4318 PL_curstackinfo->si_type = PERLSI_MAIN;
4319 #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
4320 PL_curstackinfo->si_stack_hwm = 0;
4322 PL_curstack = PL_curstackinfo->si_stack;
4323 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4325 PL_stack_base = AvARRAY(PL_curstack);
4326 PL_stack_sp = PL_stack_base;
4327 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4329 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4332 PL_tmps_max = REASONABLE(128);
4334 Newx(PL_markstack,REASONABLE(32),I32);
4335 PL_markstack_ptr = PL_markstack;
4336 PL_markstack_max = PL_markstack + REASONABLE(32);
4340 Newx(PL_scopestack,REASONABLE(32),I32);
4342 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4344 PL_scopestack_ix = 0;
4345 PL_scopestack_max = REASONABLE(32);
4347 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4348 Newx(PL_savestack, size, ANY);
4349 PL_savestack_ix = 0;
4350 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4351 PL_savestack_max = size - SS_MAXPUSH;
4359 while (PL_curstackinfo->si_next)
4360 PL_curstackinfo = PL_curstackinfo->si_next;
4361 while (PL_curstackinfo) {
4362 PERL_SI *p = PL_curstackinfo->si_prev;
4363 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4364 Safefree(PL_curstackinfo->si_cxstack);
4365 Safefree(PL_curstackinfo);
4366 PL_curstackinfo = p;
4368 Safefree(PL_tmps_stack);
4369 Safefree(PL_markstack);
4370 Safefree(PL_scopestack);
4372 Safefree(PL_scopestack_name);
4374 Safefree(PL_savestack);
4378 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4380 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4381 AV *const isa = GvAVn(gv);
4384 PERL_ARGS_ASSERT_POPULATE_ISA;
4386 if(AvFILLp(isa) != -1)
4389 /* NOTE: No support for tied ISA */
4391 va_start(args, len);
4393 const char *const parent = va_arg(args, const char*);
4398 parent_len = va_arg(args, size_t);
4400 /* Arguments are supplied with a trailing :: */
4401 assert(parent_len > 2);
4402 assert(parent[parent_len - 1] == ':');
4403 assert(parent[parent_len - 2] == ':');
4404 av_push(isa, newSVpvn(parent, parent_len - 2));
4405 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4412 S_init_predump_symbols(pTHX)
4417 sv_setpvs(get_sv("\"", GV_ADD), " ");
4418 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4421 /* Historically, PVIOs were blessed into IO::Handle, unless
4422 FileHandle was loaded, in which case they were blessed into
4423 that. Action at a distance.
4424 However, if we simply bless into IO::Handle, we break code
4425 that assumes that PVIOs will have (among others) a seek
4426 method. IO::File inherits from IO::Handle and IO::Seekable,
4427 and provides the needed methods. But if we simply bless into
4428 it, then we break code that assumed that by loading
4429 IO::Handle, *it* would work.
4430 So a compromise is to set up the correct @IO::File::ISA,
4431 so that code that does C<use IO::Handle>; will still work.
4434 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4435 STR_WITH_LEN("IO::Handle::"),
4436 STR_WITH_LEN("IO::Seekable::"),
4437 STR_WITH_LEN("Exporter::"),
4440 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4441 GvMULTI_on(PL_stdingv);
4442 io = GvIOp(PL_stdingv);
4443 IoTYPE(io) = IoTYPE_RDONLY;
4444 IoIFP(io) = PerlIO_stdin();
4445 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4447 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4449 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4452 IoTYPE(io) = IoTYPE_WRONLY;
4453 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4455 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4457 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4459 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4460 GvMULTI_on(PL_stderrgv);
4461 io = GvIOp(PL_stderrgv);
4462 IoTYPE(io) = IoTYPE_WRONLY;
4463 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4464 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4466 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4468 PL_statname = newSVpvs(""); /* last filename we did stat on */
4472 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4474 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4476 argc--,argv++; /* skip name of script */
4477 if (PL_doswitches) {
4478 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4482 if (argv[0][1] == '-' && !argv[0][2]) {
4486 if ((s = strchr(argv[0], '='))) {
4487 const char *const start_name = argv[0] + 1;
4488 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4489 TRUE, SVt_PV)), s + 1);
4492 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4495 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4496 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4497 GvMULTI_on(PL_argvgv);
4498 av_clear(GvAVn(PL_argvgv));
4499 for (; argc > 0; argc--,argv++) {
4500 SV * const sv = newSVpv(argv[0],0);
4501 av_push(GvAV(PL_argvgv),sv);
4502 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4503 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4506 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4507 (void)sv_utf8_decode(sv);
4511 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4512 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4513 "-i used with no filenames on the command line, "
4514 "reading from STDIN");
4518 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4525 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4527 PL_toptarget = newSV_type(SVt_PVIV);
4528 SvPVCLEAR(PL_toptarget);
4529 PL_bodytarget = newSV_type(SVt_PVIV);
4530 SvPVCLEAR(PL_bodytarget);
4531 PL_formtarget = PL_bodytarget;
4535 init_argv_symbols(argc,argv);
4537 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4538 sv_setpv(GvSV(tmpgv),PL_origfilename);
4540 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4542 bool env_is_not_environ;
4543 SvREFCNT_inc_simple_void_NN(PL_envgv);
4544 GvMULTI_on(PL_envgv);
4545 hv = GvHVn(PL_envgv);
4546 hv_magic(hv, NULL, PERL_MAGIC_env);
4548 #ifdef USE_ENVIRON_ARRAY
4549 /* Note that if the supplied env parameter is actually a copy
4550 of the global environ then it may now point to free'd memory
4551 if the environment has been modified since. To avoid this
4552 problem we treat env==NULL as meaning 'use the default'
4556 env_is_not_environ = env != environ;
4557 if (env_is_not_environ
4558 # ifdef USE_ITHREADS
4559 && PL_curinterp == aTHX
4571 for (; *env; env++) {
4574 if (!(s = strchr(old_var,'=')) || s == old_var)
4578 #if defined(MSDOS) && !defined(DJGPP)
4580 (void)strupr(old_var);
4583 if (hv_exists(hv, old_var, nlen)) {
4584 const char *name = savepvn(old_var, nlen);
4586 /* make sure we use the same value as getenv(), otherwise code that
4587 uses getenv() (like setlocale()) might see a different value to %ENV
4589 sv = newSVpv(PerlEnv_getenv(name), 0);
4591 /* keep a count of the dups of this name so we can de-dup environ later */
4592 if (hv_exists(dups, name, nlen))
4593 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4595 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4600 sv = newSVpv(s+1, 0);
4602 (void)hv_store(hv, old_var, nlen, sv, 0);
4603 if (env_is_not_environ)
4607 /* environ has some duplicate definitions, remove them */
4610 while ((entry = hv_iternext_flags(dups, 0))) {
4612 const char *name = HePV(entry, nlen);
4613 IV count = SvIV(HeVAL(entry));
4615 SV **valp = hv_fetch(hv, name, nlen, 0);
4619 /* try to remove any duplicate names, depending on the
4620 * implementation used in my_setenv() the iteration might
4621 * not be necessary, but let's be safe.
4623 for (i = 0; i < count; ++i)
4626 /* and set it back to the value we set $ENV{name} to */
4627 my_setenv(name, SvPV_nolen(*valp));
4630 SvREFCNT_dec_NN(dups);
4632 #endif /* USE_ENVIRON_ARRAY */
4633 #endif /* !PERL_MICRO */
4637 /* touch @F array to prevent spurious warnings 20020415 MJD */
4639 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4644 S_init_perllib(pTHX)
4647 const char *perl5lib = NULL;
4650 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4654 if (!TAINTING_get) {
4656 perl5lib = PerlEnv_getenv("PERL5LIB");
4658 * It isn't possible to delete an environment variable with
4659 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4660 * case we treat PERL5LIB as undefined if it has a zero-length value.
4662 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4663 if (perl5lib && *perl5lib != '\0')
4667 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4669 s = PerlEnv_getenv("PERLLIB");
4671 incpush_use_sep(s, 0, 0);
4674 /* Treat PERL5?LIB as a possible search list logical name -- the
4675 * "natural" VMS idiom for a Unix path string. We allow each
4676 * element to be a set of |-separated directories for compatibility.
4680 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4682 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4683 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4685 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4686 incpush_use_sep(buf, 0, 0);
4691 #ifndef PERL_IS_MINIPERL
4692 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4693 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4695 #include "perl_inc_macro.h"
4696 /* Use the ~-expanded versions of APPLLIB (undocumented),
4697 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4700 INCPUSH_SITEARCH_EXP
4702 INCPUSH_PERL_VENDORARCH_EXP
4703 INCPUSH_PERL_VENDORLIB_EXP
4706 INCPUSH_PERL_OTHERLIBDIRS
4708 INCPUSH_APPLLIB_OLD_EXP
4709 INCPUSH_SITELIB_STEM
4710 INCPUSH_PERL_VENDORLIB_STEM
4711 INCPUSH_PERL_OTHERLIBDIRS_ARCHONLY
4713 #endif /* !PERL_IS_MINIPERL */
4715 if (!TAINTING_get) {
4716 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4717 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4718 if (unsafe && strEQ(unsafe, "1"))
4720 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4724 #if defined(DOSISH) || defined(__SYMBIAN32__)
4725 # define PERLLIB_SEP ';'
4726 #elif defined(__VMS)
4727 # define PERLLIB_SEP PL_perllib_sep
4729 # define PERLLIB_SEP ':'
4731 #ifndef PERLLIB_MANGLE
4732 # define PERLLIB_MANGLE(s,n) (s)
4735 #ifndef PERL_IS_MINIPERL
4736 /* Push a directory onto @INC if it exists.
4737 Generate a new SV if we do this, to save needing to copy the SV we push
4740 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4744 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4746 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4747 S_ISDIR(tmpstatbuf.st_mode)) {
4749 dir = newSVsv(stem);
4751 /* Truncate dir back to stem. */
4752 SvCUR_set(dir, SvCUR(stem));
4759 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4761 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4764 PERL_ARGS_ASSERT_MAYBERELOCATE;
4767 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4768 defined to so something (in os2/os2.c), but the code has been
4769 this way, ignoring any possible changed of length, since
4770 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4772 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4778 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4780 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4781 sv_usepvn(libdir,unix,len);
4784 PerlIO_printf(Perl_error_log,
4785 "Failed to unixify @INC element \"%s\"\n",
4786 SvPV_nolen_const(libdir));
4790 /* Do the if() outside the #ifdef to avoid warnings about an unused
4793 #ifdef PERL_RELOCATABLE_INC
4795 * Relocatable include entries are marked with a leading .../
4798 * 0: Remove that leading ".../"
4799 * 1: Remove trailing executable name (anything after the last '/')
4800 * from the perl path to give a perl prefix
4802 * While the @INC element starts "../" and the prefix ends with a real
4803 * directory (ie not . or ..) chop that real directory off the prefix
4804 * and the leading "../" from the @INC element. ie a logical "../"
4806 * Finally concatenate the prefix and the remainder of the @INC element
4807 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4808 * generates /usr/local/lib/perl5
4810 const char *libpath = SvPVX(libdir);
4811 STRLEN libpath_len = SvCUR(libdir);
4812 if (memBEGINs(libpath, libpath_len, ".../")) {
4814 SV * const caret_X = get_sv("\030", 0);
4815 /* Going to use the SV just as a scratch buffer holding a C
4821 /* $^X is *the* source of taint if tainting is on, hence
4822 SvPOK() won't be true. */
4824 assert(SvPOKp(caret_X));
4825 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4827 /* Firstly take off the leading .../
4828 If all else fail we'll do the paths relative to the current
4830 sv_chop(libdir, libpath + 4);
4831 /* Don't use SvPV as we're intentionally bypassing taining,
4832 mortal copies that the mg_get of tainting creates, and
4833 corruption that seems to come via the save stack.
4834 I guess that the save stack isn't correctly set up yet. */
4835 libpath = SvPVX(libdir);
4836 libpath_len = SvCUR(libdir);
4838 prefix = SvPVX(prefix_sv);
4839 lastslash = (char *) my_memrchr(prefix, '/',
4840 SvEND(prefix_sv) - prefix);
4842 /* First time in with the *lastslash = '\0' we just wipe off
4843 the trailing /perl from (say) /usr/foo/bin/perl
4847 while ((*lastslash = '\0'), /* Do that, come what may. */
4848 ( memBEGINs(libpath, libpath_len, "../")
4850 (char *) my_memrchr(prefix, '/',
4851 SvEND(prefix_sv) - prefix))))
4853 if (lastslash[1] == '\0'
4854 || (lastslash[1] == '.'
4855 && (lastslash[2] == '/' /* ends "/." */
4856 || (lastslash[2] == '/'
4857 && lastslash[3] == '/' /* or "/.." */
4859 /* Prefix ends "/" or "/." or "/..", any of which
4860 are fishy, so don't do any more logical cleanup.
4864 /* Remove leading "../" from path */
4867 /* Next iteration round the loop removes the last
4868 directory name from prefix by writing a '\0' in
4869 the while clause. */
4871 /* prefix has been terminated with a '\0' to the correct
4872 length. libpath points somewhere into the libdir SV.
4873 We need to join the 2 with '/' and drop the result into
4875 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4876 SvREFCNT_dec(libdir);
4877 /* And this is the new libdir. */
4880 (PerlProc_getuid() != PerlProc_geteuid() ||
4881 PerlProc_getgid() != PerlProc_getegid())) {
4882 /* Need to taint relocated paths if running set ID */
4883 SvTAINTED_on(libdir);
4886 SvREFCNT_dec(prefix_sv);
4894 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4896 #ifndef PERL_IS_MINIPERL
4897 const U8 using_sub_dirs
4898 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4899 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4900 const U8 add_versioned_sub_dirs
4901 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4902 const U8 add_archonly_sub_dirs
4903 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4904 #ifdef PERL_INC_VERSION_LIST
4905 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4908 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4909 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4910 AV *const inc = GvAVn(PL_incgv);
4912 PERL_ARGS_ASSERT_INCPUSH;
4915 /* Could remove this vestigial extra block, if we don't mind a lot of
4916 re-indenting diff noise. */
4918 SV *const libdir = mayberelocate(dir, len, flags);
4919 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4920 arranged to unshift #! line -I onto the front of @INC. However,
4921 -I can add version and architecture specific libraries, and they
4922 need to go first. The old code assumed that it was always
4923 pushing. Hence to make it work, need to push the architecture
4924 (etc) libraries onto a temporary array, then "unshift" that onto
4925 the front of @INC. */
4926 #ifndef PERL_IS_MINIPERL
4927 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4930 * BEFORE pushing libdir onto @INC we may first push version- and
4931 * archname-specific sub-directories.
4933 if (using_sub_dirs) {
4934 SV *subdir = newSVsv(libdir);
4935 #ifdef PERL_INC_VERSION_LIST
4936 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4937 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4938 const char * const *incver;
4941 if (add_versioned_sub_dirs) {
4942 /* .../version/archname if -d .../version/archname */
4943 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4944 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4946 /* .../version if -d .../version */
4947 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4948 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4951 #ifdef PERL_INC_VERSION_LIST
4953 for (incver = incverlist; *incver; incver++) {
4954 /* .../xxx if -d .../xxx */
4955 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4956 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4961 if (add_archonly_sub_dirs) {
4962 /* .../archname if -d .../archname */
4963 sv_catpvs(subdir, "/" ARCHNAME);
4964 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4968 assert (SvREFCNT(subdir) == 1);
4969 SvREFCNT_dec(subdir);
4971 #endif /* !PERL_IS_MINIPERL */
4972 /* finally add this lib directory at the end of @INC */
4974 #ifdef PERL_IS_MINIPERL
4975 const Size_t extra = 0;
4977 Size_t extra = av_tindex(av) + 1;
4979 av_unshift(inc, extra + push_basedir);
4981 av_store(inc, extra, libdir);
4982 #ifndef PERL_IS_MINIPERL
4984 /* av owns a reference, av_store() expects to be donated a
4985 reference, and av expects to be sane when it's cleared.
4986 If I wanted to be naughty and wrong, I could peek inside the
4987 implementation of av_clear(), realise that it uses
4988 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4989 and so directly steal from it (with a memcpy() to inc, and
4990 then memset() to NULL them out. But people copy code from the
4991 core expecting it to be best practise, so let's use the API.
4992 Although studious readers will note that I'm not checking any
4994 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4999 else if (push_basedir) {
5000 av_push(inc, libdir);
5003 if (!push_basedir) {
5004 assert (SvREFCNT(libdir) == 1);
5005 SvREFCNT_dec(libdir);
5011 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
5015 /* This logic has been broken out from S_incpush(). It may be possible to
5018 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
5020 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
5021 * argument to incpush_use_sep. This allows creation of relocatable
5022 * Perl distributions that patch the binary at install time. Those
5023 * distributions will have to provide their own relocation tools; this
5024 * is not a feature otherwise supported by core Perl.
5026 #ifndef PERL_RELOCATABLE_INCPUSH
5033 /* Break at all separators */
5034 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
5036 /* skip any consecutive separators */
5038 /* Uncomment the next line for PATH semantics */
5039 /* But you'll need to write tests */
5040 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
5042 incpush(p, (STRLEN)(s - p), flags);
5047 incpush(p, (STRLEN)(end - p), flags);
5052 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5055 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5061 PERL_ARGS_ASSERT_CALL_LIST;
5063 while (av_tindex(paramList) >= 0) {
5064 cv = MUTABLE_CV(av_shift(paramList));
5066 if (paramList == PL_beginav) {
5067 /* save PL_beginav for compiler */
5068 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5070 else if (paramList == PL_checkav) {
5071 /* save PL_checkav for compiler */
5072 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5074 else if (paramList == PL_unitcheckav) {
5075 /* save PL_unitcheckav for compiler */
5076 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5086 (void)SvPV_const(atsv, len);
5088 PL_curcop = &PL_compiling;
5089 CopLINE_set(PL_curcop, oldline);
5090 if (paramList == PL_beginav)
5091 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5093 Perl_sv_catpvf(aTHX_ atsv,
5094 "%s failed--call queue aborted",
5095 paramList == PL_checkav ? "CHECK"
5096 : paramList == PL_initav ? "INIT"
5097 : paramList == PL_unitcheckav ? "UNITCHECK"
5099 while (PL_scopestack_ix > oldscope)
5102 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5109 /* my_exit() was called */
5110 while (PL_scopestack_ix > oldscope)
5113 SET_CURSTASH(PL_defstash);
5114 PL_curcop = &PL_compiling;
5115 CopLINE_set(PL_curcop, oldline);
5118 NOT_REACHED; /* NOTREACHED */
5121 PL_curcop = &PL_compiling;
5122 CopLINE_set(PL_curcop, oldline);
5125 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5134 Perl_my_exit(pTHX_ U32 status)
5136 if (PL_exit_flags & PERL_EXIT_ABORT) {
5139 if (PL_exit_flags & PERL_EXIT_WARN) {
5140 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5141 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5142 PL_exit_flags &= ~PERL_EXIT_ABORT;
5152 STATUS_EXIT_SET(status);
5159 Perl_my_failure_exit(pTHX)
5162 /* We have been called to fall on our sword. The desired exit code
5163 * should be already set in STATUS_UNIX, but could be shifted over
5164 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5167 * If an error code has not been set, then force the issue.
5169 if (MY_POSIX_EXIT) {
5171 /* According to the die_exit.t tests, if errno is non-zero */
5172 /* It should be used for the error status. */
5174 if (errno == EVMSERR) {
5175 STATUS_NATIVE = vaxc$errno;
5178 /* According to die_exit.t tests, if the child_exit code is */
5179 /* also zero, then we need to exit with a code of 255 */
5180 if ((errno != 0) && (errno < 256))
5181 STATUS_UNIX_EXIT_SET(errno);
5182 else if (STATUS_UNIX < 255) {
5183 STATUS_UNIX_EXIT_SET(255);
5188 /* The exit code could have been set by $? or vmsish which
5189 * means that it may not have fatal set. So convert
5190 * success/warning codes to fatal with out changing
5191 * the POSIX status code. The severity makes VMS native
5192 * status handling work, while UNIX mode programs use the
5193 * the POSIX exit codes.
5195 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5196 STATUS_NATIVE &= STS$M_COND_ID;
5197 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5201 /* Traditionally Perl on VMS always expects a Fatal Error. */
5202 if (vaxc$errno & 1) {
5204 /* So force success status to failure */
5205 if (STATUS_NATIVE & 1)
5210 STATUS_UNIX = EINTR; /* In case something cares */
5215 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5217 /* Encode the severity code */
5218 severity = STATUS_NATIVE & STS$M_SEVERITY;
5219 STATUS_UNIX = (severity ? severity : 1) << 8;
5221 /* Perl expects this to be a fatal error */
5222 if (severity != STS$K_SEVERE)
5232 STATUS_UNIX_SET(eno);
5234 exitstatus = STATUS_UNIX >> 8;
5235 if (exitstatus & 255)
5236 STATUS_UNIX_SET(exitstatus);
5238 STATUS_UNIX_SET(255);
5241 if (PL_exit_flags & PERL_EXIT_ABORT) {
5244 if (PL_exit_flags & PERL_EXIT_WARN) {
5245 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5246 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5247 PL_exit_flags &= ~PERL_EXIT_ABORT;
5253 S_my_exit_jump(pTHX)
5256 SvREFCNT_dec(PL_e_script);
5260 POPSTACK_TO(PL_mainstack);
5261 if (cxstack_ix >= 0) {
5263 cx_popblock(cxstack);
5271 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5273 const char * const p = SvPVX_const(PL_e_script);
5274 const char * const e = SvEND(PL_e_script);
5275 const char *nl = (char *) memchr(p, '\n', e - p);
5277 PERL_UNUSED_ARG(idx);
5278 PERL_UNUSED_ARG(maxlen);
5280 nl = (nl) ? nl+1 : e;
5282 filter_del(read_e_script);
5285 sv_catpvn(buf_sv, p, nl-p);
5286 sv_chop(PL_e_script, nl);
5290 /* removes boilerplate code at the end of each boot_Module xsub */
5292 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5295 call_list(PL_scopestack_ix, PL_unitcheckav);
5300 * ex: set ts=8 sts=4 sw=4 et: