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 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;
98 MUTEX_INIT(&PL_dollarzero_mutex);
99 MUTEX_INIT(&PL_my_ctx_mutex);
102 #if defined(USE_ITHREADS)
105 /* This always happens for non-ithreads */
108 PERL_SET_THX(my_perl);
113 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
116 Perl_sys_init(int* argc, char*** argv)
120 PERL_ARGS_ASSERT_SYS_INIT;
122 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
123 PERL_UNUSED_ARG(argv);
124 PERL_SYS_INIT_BODY(argc, argv);
128 Perl_sys_init3(int* argc, char*** argv, char*** env)
132 PERL_ARGS_ASSERT_SYS_INIT3;
134 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
135 PERL_UNUSED_ARG(argv);
136 PERL_UNUSED_ARG(env);
137 PERL_SYS_INIT3_BODY(argc, argv, env);
144 if (!PL_veto_cleanup) {
145 PERL_SYS_TERM_BODY();
150 #ifdef PERL_IMPLICIT_SYS
152 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
153 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
154 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
155 struct IPerlDir* ipD, struct IPerlSock* ipS,
156 struct IPerlProc* ipP)
158 PerlInterpreter *my_perl;
160 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
162 /* Newx() needs interpreter, so call malloc() instead */
163 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
164 S_init_tls_and_interp(my_perl);
165 Zero(my_perl, 1, PerlInterpreter);
175 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
182 =head1 Embedding Functions
184 =for apidoc perl_alloc
186 Allocates a new Perl interpreter. See L<perlembed>.
194 PerlInterpreter *my_perl;
196 /* Newx() needs interpreter, so call malloc() instead */
197 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
199 S_init_tls_and_interp(my_perl);
200 #ifndef PERL_TRACK_MEMPOOL
201 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
203 Zero(my_perl, 1, PerlInterpreter);
204 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
208 #endif /* PERL_IMPLICIT_SYS */
211 =for apidoc perl_construct
213 Initializes a new Perl interpreter. See L<perlembed>.
219 S_fixup_platform_bugs(void)
221 #if defined(__GLIBC__) && IVSIZE == 8 \
222 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
226 /* Cannot do this check with inlined IV constants since
227 * that seems to work correctly even with the buggy glibc. */
230 /* Yikes, we have the bug.
231 * Patch in the workaround version. */
232 PL_ppaddr[OP_I_MODULO] = &Perl_pp_i_modulo_glibc_bugfix;
239 perl_construct(pTHXx)
243 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
247 PL_perl_destruct_level = 1;
249 PERL_UNUSED_ARG(my_perl);
250 if (PL_perl_destruct_level > 0)
253 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
255 #ifdef PERL_TRACE_OPS
256 Zero(PL_op_exec_cnt, OP_max+2, UV);
261 SvREADONLY_on(&PL_sv_placeholder);
262 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
264 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
265 #ifdef PERL_USES_PL_PIDSTATUS
266 PL_pidstatus = newHV();
269 PL_rs = newSVpvs("\n");
273 /* The PERL_INTERNAL_RAND_SEED set-up must be after init_stacks because it calls
274 * things that may put SVs on the stack.
277 #ifdef NO_PERL_INTERNAL_RAND_SEED
278 Perl_drand48_init_r(&PL_internal_random_state, seed());
283 if (PerlProc_getuid() != PerlProc_geteuid() ||
284 PerlProc_getgid() != PerlProc_getegid() ||
285 !(env_pv = PerlEnv_getenv("PERL_INTERNAL_RAND_SEED")) ||
286 grok_number(env_pv, strlen(env_pv), &seed) != IS_NUMBER_IN_UV) {
289 Perl_drand48_init_r(&PL_internal_random_state, (U32)seed);
295 S_fixup_platform_bugs();
302 #if defined(LOCAL_PATCH_COUNT)
303 PL_localpatches = local_patches; /* For possible -v */
306 #if defined(LIBM_LIB_VERSION)
308 * Some BSDs and Cygwin default to POSIX math instead of IEEE.
309 * This switches them over to IEEE.
311 _LIB_VERSION = _IEEE_;
314 #ifdef HAVE_INTERP_INTERN
318 PerlIO_init(aTHX); /* Hook to IO system */
320 PL_fdpid = newAV(); /* for remembering popen pids by fd */
321 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
322 PL_errors = newSVpvs("");
323 SvPVCLEAR(PERL_DEBUG_PAD(0)); /* For regex debugging. */
324 SvPVCLEAR(PERL_DEBUG_PAD(1)); /* ext/re needs these */
325 SvPVCLEAR(PERL_DEBUG_PAD(2)); /* even without DEBUGGING. */
327 /* First entry is a list of empty elements. It needs to be initialised
328 else all hell breaks loose in S_find_uninit_var(). */
329 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
330 PL_regex_pad = AvARRAY(PL_regex_padav);
331 Newxz(PL_stashpad, PL_stashpadmax, HV *);
333 #ifdef USE_REENTRANT_API
334 Perl_reentrant_init(aTHX);
336 if (PL_hash_seed_set == FALSE) {
337 /* Initialize the hash seed and state at startup. This must be
338 * done very early, before ANY hashes are constructed, and once
339 * setup is fixed for the lifetime of the process.
341 * If you decide to disable the seeding process you should choose
342 * a suitable seed yourself and define PERL_HASH_SEED to a well chosen
343 * string. See hv_func.h for details.
345 #if defined(USE_HASH_SEED)
346 /* get the hash seed from the environment or from an RNG */
347 Perl_get_hash_seed(aTHX_ PL_hash_seed);
349 /* they want a hard coded seed, check that it is long enough */
350 assert( strlen(PERL_HASH_SEED) >= PERL_HASH_SEED_BYTES );
353 /* now we use the chosen seed to initialize the state -
354 * in some configurations this may be a relatively speaking
355 * expensive operation, but we only have to do it once at startup */
356 PERL_HASH_SEED_STATE(PERL_HASH_SEED,PL_hash_state);
358 #ifdef PERL_USE_SINGLE_CHAR_HASH_CACHE
359 /* we can build a special cache for 0/1 byte keys, if people choose
360 * I suspect most of the time it is not worth it */
364 for (i=0;i<256;i++) {
366 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[i],str,1);
368 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[256],str,0);
371 /* at this point we have initialezed the hash function, and we can start
372 * constructing hashes */
373 PL_hash_seed_set= TRUE;
376 /* Allow PL_strtab to be pre-initialized before calling perl_construct.
377 * can use a custom optimized PL_strtab hash before calling perl_construct */
379 /* Note that strtab is a rather special HV. Assumptions are made
380 about not iterating on it, and not adding tie magic to it.
381 It is properly deallocated in perl_destruct() */
384 /* SHAREKEYS tells us that the hash has its keys shared with PL_strtab,
385 * which is not the case with PL_strtab itself */
386 HvSHAREKEYS_off(PL_strtab); /* mandatory */
387 hv_ksplit(PL_strtab, 1 << 11);
390 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
393 # ifdef USE_ENVIRON_ARRAY
394 PL_origenviron = environ;
398 /* Use sysconf(_SC_CLK_TCK) if available, if not
399 * available or if the sysconf() fails, use the HZ.
400 * The HZ if not originally defined has been by now
401 * been defined as CLK_TCK, if available. */
402 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
403 PL_clocktick = sysconf(_SC_CLK_TCK);
404 if (PL_clocktick <= 0)
408 PL_stashcache = newHV();
410 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
413 if (!PL_mmap_page_size) {
414 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
416 SETERRNO(0, SS_NORMAL);
418 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
420 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
422 if ((long) PL_mmap_page_size < 0) {
423 Perl_croak(aTHX_ "panic: sysconf: %s",
424 errno ? Strerror(errno) : "pagesize unknown");
427 #elif defined(HAS_GETPAGESIZE)
428 PL_mmap_page_size = getpagesize();
429 #elif defined(I_SYS_PARAM) && defined(PAGESIZE)
430 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
432 if (PL_mmap_page_size <= 0)
433 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
434 (IV) PL_mmap_page_size);
436 #endif /* HAS_MMAP */
438 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
439 PL_timesbase.tms_utime = 0;
440 PL_timesbase.tms_stime = 0;
441 PL_timesbase.tms_cutime = 0;
442 PL_timesbase.tms_cstime = 0;
445 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
447 PL_registered_mros = newHV();
448 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
449 HvMAX(PL_registered_mros) = 0;
451 #ifdef USE_POSIX_2008_LOCALE
452 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
460 =for apidoc nothreadhook
462 Stub that provides thread hook for perl_destruct when there are
469 Perl_nothreadhook(pTHX)
475 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
477 Perl_dump_sv_child(pTHX_ SV *sv)
480 const int sock = PL_dumper_fd;
481 const int debug_fd = PerlIO_fileno(Perl_debug_log);
482 union control_un control;
485 struct cmsghdr *cmptr;
487 unsigned char buffer[256];
489 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
491 if(sock == -1 || debug_fd == -1)
494 PerlIO_flush(Perl_debug_log);
496 /* All these shenanigans are to pass a file descriptor over to our child for
497 it to dump out to. We can't let it hold open the file descriptor when it
498 forks, as the file descriptor it will dump to can turn out to be one end
499 of pipe that some other process will wait on for EOF. (So as it would
500 be open, the wait would be forever.) */
502 msg.msg_control = control.control;
503 msg.msg_controllen = sizeof(control.control);
504 /* We're a connected socket so we don't need a destination */
510 cmptr = CMSG_FIRSTHDR(&msg);
511 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
512 cmptr->cmsg_level = SOL_SOCKET;
513 cmptr->cmsg_type = SCM_RIGHTS;
514 *((int *)CMSG_DATA(cmptr)) = 1;
516 vec[0].iov_base = (void*)&sv;
517 vec[0].iov_len = sizeof(sv);
518 got = sendmsg(sock, &msg, 0);
521 perror("Debug leaking scalars parent sendmsg failed");
524 if(got < sizeof(sv)) {
525 perror("Debug leaking scalars parent short sendmsg");
529 /* Return protocol is
531 unsigned char: length of location string (0 for empty)
532 unsigned char*: string (not terminated)
534 vec[0].iov_base = (void*)&returned_errno;
535 vec[0].iov_len = sizeof(returned_errno);
536 vec[1].iov_base = buffer;
539 got = readv(sock, vec, 2);
542 perror("Debug leaking scalars parent read failed");
543 PerlIO_flush(PerlIO_stderr());
546 if(got < sizeof(returned_errno) + 1) {
547 perror("Debug leaking scalars parent short read");
548 PerlIO_flush(PerlIO_stderr());
553 got = read(sock, buffer + 1, *buffer);
555 perror("Debug leaking scalars parent read 2 failed");
556 PerlIO_flush(PerlIO_stderr());
561 perror("Debug leaking scalars parent short read 2");
562 PerlIO_flush(PerlIO_stderr());
567 if (returned_errno || *buffer) {
568 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
569 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
570 returned_errno, Strerror(returned_errno));
576 =for apidoc Am|int|perl_destruct|PerlInterpreter *my_perl
578 Shuts down a Perl interpreter. See L<perlembed> for a tutorial.
580 C<my_perl> points to the Perl interpreter. It must have been previously
581 created through the use of L</perl_alloc> and L</perl_construct>. It may
582 have been initialised through L</perl_parse>, and may have been used
583 through L</perl_run> and other means. This function should be called for
584 any Perl interpreter that has been constructed with L</perl_construct>,
585 even if subsequent operations on it failed, for example if L</perl_parse>
586 returned a non-zero value.
588 If the interpreter's C<PL_exit_flags> word has the
589 C<PERL_EXIT_DESTRUCT_END> flag set, then this function will execute code
590 in C<END> blocks before performing the rest of destruction. If it is
591 desired to make any use of the interpreter between L</perl_parse> and
592 L</perl_destruct> other than just calling L</perl_run>, then this flag
593 should be set early on. This matters if L</perl_run> will not be called,
594 or if anything else will be done in addition to calling L</perl_run>.
596 Returns a value be a suitable value to pass to the C library function
597 C<exit> (or to return from C<main>), to serve as an exit code indicating
598 the nature of the way the interpreter terminated. This takes into account
599 any failure of L</perl_parse> and any early exit from L</perl_run>.
600 The exit code is of the type required by the host operating system,
601 so because of differing exit code conventions it is not portable to
602 interpret specific numeric values as having specific meanings.
611 volatile signed char destruct_level; /* see possible values in intrpvar.h */
613 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
618 PERL_ARGS_ASSERT_PERL_DESTRUCT;
620 PERL_UNUSED_ARG(my_perl);
623 assert(PL_scopestack_ix == 1);
625 /* wait for all pseudo-forked children to finish */
626 PERL_WAIT_FOR_CHILDREN;
628 destruct_level = PL_perl_destruct_level;
629 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
631 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
634 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
638 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
644 if (destruct_level < i) destruct_level = i;
646 #ifdef PERL_TRACK_MEMPOOL
647 /* RT #114496, for perl_free */
648 PL_perl_destruct_level = i;
654 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
660 if (PL_endav && !PL_minus_c) {
661 PERL_SET_PHASE(PERL_PHASE_END);
662 call_list(PL_scopestack_ix, PL_endav);
668 assert(PL_scopestack_ix == 0);
670 /* Need to flush since END blocks can produce output */
671 /* flush stdout separately, since we can identify it */
674 PerlIO *stdo = PerlIO_stdout();
675 if (*stdo && PerlIO_flush(stdo)) {
676 PerlIO_restore_errno(stdo);
678 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s\n",
687 #ifdef PERL_TRACE_OPS
688 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
690 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
693 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
697 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
698 for (i = 0; i <= OP_max; ++i) {
699 if (PL_op_exec_cnt[i])
700 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
702 /* Utility slot for easily doing little tracing experiments in the runloop: */
703 if (PL_op_exec_cnt[OP_max+1] != 0)
704 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
705 PerlIO_printf(Perl_debug_log, "\n");
710 if (PL_threadhook(aTHX)) {
711 /* Threads hook has vetoed further cleanup */
712 PL_veto_cleanup = TRUE;
716 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
717 if (destruct_level != 0) {
718 /* Fork here to create a child. Our child's job is to preserve the
719 state of scalars prior to destruction, so that we can instruct it
720 to dump any scalars that we later find have leaked.
721 There's no subtlety in this code - it assumes POSIX, and it doesn't
725 if(PerlSock_socketpair_cloexec(AF_UNIX, SOCK_STREAM, 0, fd)) {
726 perror("Debug leaking scalars socketpair failed");
732 perror("Debug leaking scalars fork failed");
736 /* We are the child */
737 const int sock = fd[1];
738 const int debug_fd = PerlIO_fileno(Perl_debug_log);
741 /* Our success message is an integer 0, and a char 0 */
742 static const char success[sizeof(int) + 1] = {0};
746 /* We need to close all other file descriptors otherwise we end up
747 with interesting hangs, where the parent closes its end of a
748 pipe, and sits waiting for (another) child to terminate. Only
749 that child never terminates, because it never gets EOF, because
750 we also have the far end of the pipe open. We even need to
751 close the debugging fd, because sometimes it happens to be one
752 end of a pipe, and a process is waiting on the other end for
753 EOF. Normally it would be closed at some point earlier in
754 destruction, but if we happen to cause the pipe to remain open,
755 EOF never occurs, and we get an infinite hang. Hence all the
756 games to pass in a file descriptor if it's actually needed. */
758 f = sysconf(_SC_OPEN_MAX);
760 where = "sysconf failed";
771 union control_un control;
774 struct cmsghdr *cmptr;
778 msg.msg_control = control.control;
779 msg.msg_controllen = sizeof(control.control);
780 /* We're a connected socket so we don't need a source */
784 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
786 vec[0].iov_base = (void*)⌖
787 vec[0].iov_len = sizeof(target);
789 got = recvmsg(sock, &msg, 0);
794 where = "recv failed";
797 if(got < sizeof(target)) {
798 where = "short recv";
802 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
806 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
807 where = "wrong cmsg_len";
810 if(cmptr->cmsg_level != SOL_SOCKET) {
811 where = "wrong cmsg_level";
814 if(cmptr->cmsg_type != SCM_RIGHTS) {
815 where = "wrong cmsg_type";
819 got_fd = *(int*)CMSG_DATA(cmptr);
820 /* For our last little bit of trickery, put the file descriptor
821 back into Perl_debug_log, as if we never actually closed it
823 if(got_fd != debug_fd) {
824 if (PerlLIO_dup2_cloexec(got_fd, debug_fd) == -1) {
831 PerlIO_flush(Perl_debug_log);
833 got = write(sock, &success, sizeof(success));
836 where = "write failed";
839 if(got < sizeof(success)) {
840 where = "short write";
847 int send_errno = errno;
848 unsigned char length = (unsigned char) strlen(where);
849 struct iovec failure[3] = {
850 {(void*)&send_errno, sizeof(send_errno)},
852 {(void*)where, length}
854 int got = writev(sock, failure, 3);
855 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
856 in the parent if we try to read from the socketpair after the
857 child has exited, even if there was data to read.
858 So sleep a bit to give the parent a fighting chance of
861 _exit((got == -1) ? errno : 0);
865 PL_dumper_fd = fd[0];
870 /* We must account for everything. */
872 /* Destroy the main CV and syntax tree */
873 /* Set PL_curcop now, because destroying ops can cause new SVs
874 to be generated in Perl_pad_swipe, and when running with
875 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
876 op from which the filename structure member is copied. */
877 PL_curcop = &PL_compiling;
879 /* ensure comppad/curpad to refer to main's pad */
880 if (CvPADLIST(PL_main_cv)) {
881 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
882 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
884 op_free(PL_main_root);
887 PL_main_start = NULL;
888 /* note that PL_main_cv isn't usually actually freed at this point,
889 * due to the CvOUTSIDE refs from subs compiled within it. It will
890 * get freed once all the subs are freed in sv_clean_all(), for
891 * destruct_level > 0 */
892 SvREFCNT_dec(PL_main_cv);
894 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
896 /* Tell PerlIO we are about to tear things apart in case
897 we have layers which are using resources that should
901 PerlIO_destruct(aTHX);
904 * Try to destruct global references. We do this first so that the
905 * destructors and destructees still exist. Some sv's might remain.
906 * Non-referenced objects are on their own.
910 /* unhook hooks which will soon be, or use, destroyed data */
911 SvREFCNT_dec(PL_warnhook);
913 SvREFCNT_dec(PL_diehook);
916 /* call exit list functions */
917 while (PL_exitlistlen-- > 0)
918 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
920 Safefree(PL_exitlist);
925 SvREFCNT_dec(PL_registered_mros);
927 /* jettison our possibly duplicated environment */
928 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
929 * so we certainly shouldn't free it here
932 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
933 if (environ != PL_origenviron && !PL_use_safe_putenv
935 /* only main thread can free environ[0] contents */
936 && PL_curinterp == aTHX
942 for (i = 0; environ[i]; i++)
943 safesysfree(environ[i]);
945 /* Must use safesysfree() when working with environ. */
946 safesysfree(environ);
948 environ = PL_origenviron;
951 #endif /* !PERL_MICRO */
953 if (destruct_level == 0) {
955 DEBUG_P(debprofdump());
957 #if defined(PERLIO_LAYERS)
958 /* No more IO - including error messages ! */
959 PerlIO_cleanup(aTHX);
962 CopFILE_free(&PL_compiling);
964 /* The exit() function will do everything that needs doing. */
968 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
971 /* the syntax tree is shared between clones
972 * so op_free(PL_main_root) only ReREFCNT_dec's
973 * REGEXPs in the parent interpreter
974 * we need to manually ReREFCNT_dec for the clones
977 I32 i = AvFILLp(PL_regex_padav);
978 SV **ary = AvARRAY(PL_regex_padav);
981 SvREFCNT_dec(ary[i]);
982 ary[i] = &PL_sv_undef;
988 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
989 PL_stashcache = NULL;
991 /* loosen bonds of global variables */
993 /* XXX can PL_parser still be non-null here? */
994 if(PL_parser && PL_parser->rsfp) {
995 (void)PerlIO_close(PL_parser->rsfp);
996 PL_parser->rsfp = NULL;
1000 Safefree(PL_splitstr);
1010 PL_doswitches = FALSE;
1011 PL_dowarn = G_WARN_OFF;
1012 #ifdef PERL_SAWAMPERSAND
1013 PL_sawampersand = 0; /* must save all match strings */
1017 Safefree(PL_inplace);
1019 SvREFCNT_dec(PL_patchlevel);
1022 SvREFCNT_dec(PL_e_script);
1028 /* magical thingies */
1030 SvREFCNT_dec(PL_ofsgv); /* *, */
1033 SvREFCNT_dec(PL_ors_sv); /* $\ */
1036 SvREFCNT_dec(PL_rs); /* $/ */
1039 Safefree(PL_osname); /* $^O */
1042 SvREFCNT_dec(PL_statname);
1046 /* defgv, aka *_ should be taken care of elsewhere */
1049 Safefree(PL_efloatbuf);
1050 PL_efloatbuf = NULL;
1053 /* startup and shutdown function lists */
1054 SvREFCNT_dec(PL_beginav);
1055 SvREFCNT_dec(PL_beginav_save);
1056 SvREFCNT_dec(PL_endav);
1057 SvREFCNT_dec(PL_checkav);
1058 SvREFCNT_dec(PL_checkav_save);
1059 SvREFCNT_dec(PL_unitcheckav);
1060 SvREFCNT_dec(PL_unitcheckav_save);
1061 SvREFCNT_dec(PL_initav);
1063 PL_beginav_save = NULL;
1066 PL_checkav_save = NULL;
1067 PL_unitcheckav = NULL;
1068 PL_unitcheckav_save = NULL;
1071 /* shortcuts just get cleared */
1074 PL_argvoutgv = NULL;
1077 PL_last_in_gv = NULL;
1088 SvREFCNT_dec(PL_envgv);
1089 SvREFCNT_dec(PL_incgv);
1090 SvREFCNT_dec(PL_argvgv);
1091 SvREFCNT_dec(PL_replgv);
1092 SvREFCNT_dec(PL_DBgv);
1093 SvREFCNT_dec(PL_DBline);
1094 SvREFCNT_dec(PL_DBsub);
1103 SvREFCNT_dec(PL_argvout_stack);
1104 PL_argvout_stack = NULL;
1106 SvREFCNT_dec(PL_modglobal);
1107 PL_modglobal = NULL;
1108 SvREFCNT_dec(PL_preambleav);
1109 PL_preambleav = NULL;
1110 SvREFCNT_dec(PL_subname);
1112 #ifdef PERL_USES_PL_PIDSTATUS
1113 SvREFCNT_dec(PL_pidstatus);
1114 PL_pidstatus = NULL;
1116 SvREFCNT_dec(PL_toptarget);
1117 PL_toptarget = NULL;
1118 SvREFCNT_dec(PL_bodytarget);
1119 PL_bodytarget = NULL;
1120 PL_formtarget = NULL;
1122 /* free locale stuff */
1123 #ifdef USE_LOCALE_COLLATE
1124 Safefree(PL_collation_name);
1125 PL_collation_name = NULL;
1127 #if defined(USE_POSIX_2008_LOCALE) \
1128 && defined(USE_THREAD_SAFE_LOCALE) \
1129 && ! defined(HAS_QUERYLOCALE)
1130 for (i = 0; i < (int) C_ARRAY_LENGTH(PL_curlocales); i++) {
1131 Safefree(PL_curlocales[i]);
1132 PL_curlocales[i] = NULL;
1135 #ifdef HAS_POSIX_2008_LOCALE
1137 /* This also makes sure we aren't using a locale object that gets freed
1139 const locale_t old_locale = uselocale(LC_GLOBAL_LOCALE);
1140 if (old_locale != LC_GLOBAL_LOCALE) {
1141 freelocale(old_locale);
1144 # ifdef USE_LOCALE_NUMERIC
1145 if (PL_underlying_numeric_obj) {
1146 freelocale(PL_underlying_numeric_obj);
1147 PL_underlying_numeric_obj = (locale_t) NULL;
1151 #ifdef USE_LOCALE_NUMERIC
1152 Safefree(PL_numeric_name);
1153 PL_numeric_name = NULL;
1154 SvREFCNT_dec(PL_numeric_radix_sv);
1155 PL_numeric_radix_sv = NULL;
1158 if (PL_setlocale_buf) {
1159 Safefree(PL_setlocale_buf);
1160 PL_setlocale_buf = NULL;
1163 if (PL_langinfo_buf) {
1164 Safefree(PL_langinfo_buf);
1165 PL_langinfo_buf = NULL;
1168 /* clear character classes */
1169 SvREFCNT_dec(PL_utf8_mark);
1170 SvREFCNT_dec(PL_InBitmap);
1171 #ifdef USE_LOCALE_CTYPE
1172 SvREFCNT_dec(PL_warn_locale);
1174 PL_utf8_mark = NULL;
1176 #ifdef USE_LOCALE_CTYPE
1177 PL_warn_locale = NULL;
1180 if (!specialWARN(PL_compiling.cop_warnings))
1181 PerlMemShared_free(PL_compiling.cop_warnings);
1182 PL_compiling.cop_warnings = NULL;
1183 cophh_free(CopHINTHASH_get(&PL_compiling));
1184 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1185 CopFILE_free(&PL_compiling);
1187 /* Prepare to destruct main symbol table. */
1190 /* break ref loop *:: <=> %:: */
1191 (void)hv_deletes(hv, "main::", G_DISCARD);
1194 SvREFCNT_dec(PL_curstname);
1195 PL_curstname = NULL;
1197 /* clear queued errors */
1198 SvREFCNT_dec(PL_errors);
1201 SvREFCNT_dec(PL_isarev);
1204 if (destruct_level >= 2) {
1205 if (PL_scopestack_ix != 0)
1206 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1207 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1208 (long)PL_scopestack_ix);
1209 if (PL_savestack_ix != 0)
1210 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1211 "Unbalanced saves: %ld more saves than restores\n",
1212 (long)PL_savestack_ix);
1213 if (PL_tmps_floor != -1)
1214 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1215 (long)PL_tmps_floor + 1);
1216 if (cxstack_ix != -1)
1217 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1218 (long)cxstack_ix + 1);
1222 SvREFCNT_dec(PL_regex_padav);
1223 PL_regex_padav = NULL;
1224 PL_regex_pad = NULL;
1227 #ifdef PERL_IMPLICIT_CONTEXT
1228 /* the entries in this list are allocated via SV PVX's, so get freed
1229 * in sv_clean_all */
1230 Safefree(PL_my_cxt_list);
1233 /* Now absolutely destruct everything, somehow or other, loops or no. */
1235 /* the 2 is for PL_fdpid and PL_strtab */
1236 while (sv_clean_all() > 2)
1240 Safefree(PL_stashpad); /* must come after sv_clean_all */
1243 AvREAL_off(PL_fdpid); /* no surviving entries */
1244 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1247 #ifdef HAVE_INTERP_INTERN
1251 /* constant strings */
1252 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1253 SvREFCNT_dec(PL_sv_consts[i]);
1254 PL_sv_consts[i] = NULL;
1257 /* Destruct the global string table. */
1259 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1260 * so that sv_free() won't fail on them.
1261 * Now that the global string table is using a single hunk of memory
1262 * for both HE and HEK, we either need to explicitly unshare it the
1263 * correct way, or actually free things here.
1266 const I32 max = HvMAX(PL_strtab);
1267 HE * const * const array = HvARRAY(PL_strtab);
1268 HE *hent = array[0];
1271 if (hent && ckWARN_d(WARN_INTERNAL)) {
1272 HE * const next = HeNEXT(hent);
1273 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1274 "Unbalanced string table refcount: (%ld) for \"%s\"",
1275 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1282 hent = array[riter];
1287 HvARRAY(PL_strtab) = 0;
1288 HvTOTALKEYS(PL_strtab) = 0;
1290 SvREFCNT_dec(PL_strtab);
1293 /* free the pointer tables used for cloning */
1294 ptr_table_free(PL_ptr_table);
1295 PL_ptr_table = (PTR_TBL_t*)NULL;
1298 /* free special SVs */
1300 SvREFCNT(&PL_sv_yes) = 0;
1301 sv_clear(&PL_sv_yes);
1302 SvANY(&PL_sv_yes) = NULL;
1303 SvFLAGS(&PL_sv_yes) = 0;
1305 SvREFCNT(&PL_sv_no) = 0;
1306 sv_clear(&PL_sv_no);
1307 SvANY(&PL_sv_no) = NULL;
1308 SvFLAGS(&PL_sv_no) = 0;
1310 SvREFCNT(&PL_sv_zero) = 0;
1311 sv_clear(&PL_sv_zero);
1312 SvANY(&PL_sv_zero) = NULL;
1313 SvFLAGS(&PL_sv_zero) = 0;
1317 for (i=0; i<=2; i++) {
1318 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1319 sv_clear(PERL_DEBUG_PAD(i));
1320 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1321 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1325 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1326 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1328 #ifdef DEBUG_LEAKING_SCALARS
1329 if (PL_sv_count != 0) {
1334 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1335 svend = &sva[SvREFCNT(sva)];
1336 for (sv = sva + 1; sv < svend; ++sv) {
1337 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1338 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1340 " refcnt=%"UVuf pTHX__FORMAT "\n"
1341 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1342 "serial %" UVuf "\n",
1343 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1345 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1347 sv->sv_debug_inpad ? "for" : "by",
1348 sv->sv_debug_optype ?
1349 PL_op_name[sv->sv_debug_optype]: "(none)",
1350 PTR2UV(sv->sv_debug_parent),
1353 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1354 Perl_dump_sv_child(aTHX_ sv);
1360 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1364 /* Wait for up to 4 seconds for child to terminate.
1365 This seems to be the least effort way of timing out on reaping
1367 struct timeval waitfor = {4, 0};
1368 int sock = PL_dumper_fd;
1372 FD_SET(sock, &rset);
1373 select(sock + 1, &rset, NULL, NULL, &waitfor);
1374 waitpid(child, &status, WNOHANG);
1379 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1385 #if defined(PERLIO_LAYERS)
1386 /* No more IO - including error messages ! */
1387 PerlIO_cleanup(aTHX);
1390 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1391 as currently layers use it rather than NULL as a marker
1392 for no arg - and will try and SvREFCNT_dec it.
1394 SvREFCNT(&PL_sv_undef) = 0;
1395 SvREADONLY_off(&PL_sv_undef);
1397 Safefree(PL_origfilename);
1398 PL_origfilename = NULL;
1399 Safefree(PL_reg_curpm);
1400 free_tied_hv_pool();
1401 Safefree(PL_op_mask);
1402 Safefree(PL_psig_name);
1403 PL_psig_name = (SV**)NULL;
1404 PL_psig_ptr = (SV**)NULL;
1406 /* We need to NULL PL_psig_pend first, so that
1407 signal handlers know not to use it */
1408 int *psig_save = PL_psig_pend;
1409 PL_psig_pend = (int*)NULL;
1410 Safefree(psig_save);
1413 TAINTING_set(FALSE);
1414 TAINT_WARN_set(FALSE);
1415 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1417 DEBUG_P(debprofdump());
1421 #ifdef USE_REENTRANT_API
1422 Perl_reentrant_free(aTHX);
1425 /* These all point to HVs that are about to be blown away.
1426 Code in core and on CPAN assumes that if the interpreter is re-started
1427 that they will be cleanly NULL or pointing to a valid HV. */
1428 PL_custom_op_names = NULL;
1429 PL_custom_op_descs = NULL;
1430 PL_custom_ops = NULL;
1434 while (PL_regmatch_slab) {
1435 regmatch_slab *s = PL_regmatch_slab;
1436 PL_regmatch_slab = PL_regmatch_slab->next;
1440 /* As the absolutely last thing, free the non-arena SV for mess() */
1443 /* we know that type == SVt_PVMG */
1445 /* it could have accumulated taint magic */
1448 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1449 moremagic = mg->mg_moremagic;
1450 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1452 Safefree(mg->mg_ptr);
1456 /* we know that type >= SVt_PV */
1457 SvPV_free(PL_mess_sv);
1458 Safefree(SvANY(PL_mess_sv));
1459 Safefree(PL_mess_sv);
1466 =for apidoc perl_free
1468 Releases a Perl interpreter. See L<perlembed>.
1478 PERL_ARGS_ASSERT_PERL_FREE;
1480 if (PL_veto_cleanup)
1483 #ifdef PERL_TRACK_MEMPOOL
1486 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1487 * value as we're probably hunting memory leaks then
1489 if (PL_perl_destruct_level == 0) {
1490 const U32 old_debug = PL_debug;
1491 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1492 thread at thread exit. */
1494 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1495 "free this thread's memory\n");
1496 PL_debug &= ~ DEBUG_m_FLAG;
1498 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1499 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1500 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1503 PL_debug = old_debug;
1508 #if defined(WIN32) || defined(NETWARE)
1509 # if defined(PERL_IMPLICIT_SYS)
1512 void *host = nw_internal_host;
1513 PerlMem_free(aTHXx);
1514 nw_delete_internal_host(host);
1516 void *host = w32_internal_host;
1517 PerlMem_free(aTHXx);
1518 win32_delete_internal_host(host);
1522 PerlMem_free(aTHXx);
1525 PerlMem_free(aTHXx);
1529 #if defined(USE_ITHREADS)
1530 /* provide destructors to clean up the thread key when libperl is unloaded */
1531 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1533 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1534 #pragma fini "perl_fini"
1535 #elif defined(__sun) && !defined(__GNUC__)
1536 #pragma fini (perl_fini)
1540 #if defined(__GNUC__)
1541 __attribute__((destructor))
1547 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1550 PL_curinterp && !PL_veto_cleanup)
1555 #endif /* THREADS */
1558 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1560 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1561 PL_exitlist[PL_exitlistlen].fn = fn;
1562 PL_exitlist[PL_exitlistlen].ptr = ptr;
1567 =for apidoc Am|int|perl_parse|PerlInterpreter *my_perl|XSINIT_t xsinit|int argc|char **argv|char **env
1569 Tells a Perl interpreter to parse a Perl script. This performs most
1570 of the initialisation of a Perl interpreter. See L<perlembed> for
1573 C<my_perl> points to the Perl interpreter that is to parse the script.
1574 It must have been previously created through the use of L</perl_alloc>
1575 and L</perl_construct>. C<xsinit> points to a callback function that
1576 will be called to set up the ability for this Perl interpreter to load
1577 XS extensions, or may be null to perform no such setup.
1579 C<argc> and C<argv> supply a set of command-line arguments to the Perl
1580 interpreter, as would normally be passed to the C<main> function of
1581 a C program. C<argv[argc]> must be null. These arguments are where
1582 the script to parse is specified, either by naming a script file or by
1583 providing a script in a C<-e> option.
1584 If L<C<$0>|perlvar/$0> will be written to in the Perl interpreter, then
1585 the argument strings must be in writable memory, and so mustn't just be
1588 C<env> specifies a set of environment variables that will be used by
1589 this Perl interpreter. If non-null, it must point to a null-terminated
1590 array of environment strings. If null, the Perl interpreter will use
1591 the environment supplied by the C<environ> global variable.
1593 This function initialises the interpreter, and parses and compiles the
1594 script specified by the command-line arguments. This includes executing
1595 code in C<BEGIN>, C<UNITCHECK>, and C<CHECK> blocks. It does not execute
1596 C<INIT> blocks or the main program.
1598 Returns an integer of slightly tricky interpretation. The correct
1599 use of the return value is as a truth value indicating whether there
1600 was a failure in initialisation. If zero is returned, this indicates
1601 that initialisation was successful, and it is safe to proceed to call
1602 L</perl_run> and make other use of it. If a non-zero value is returned,
1603 this indicates some problem that means the interpreter wants to terminate.
1604 The interpreter should not be just abandoned upon such failure; the caller
1605 should proceed to shut the interpreter down cleanly with L</perl_destruct>
1606 and free it with L</perl_free>.
1608 For historical reasons, the non-zero return value also attempts to
1609 be a suitable value to pass to the C library function C<exit> (or to
1610 return from C<main>), to serve as an exit code indicating the nature
1611 of the way initialisation terminated. However, this isn't portable,
1612 due to differing exit code conventions. A historical bug is preserved
1613 for the time being: if the Perl built-in C<exit> is called during this
1614 function's execution, with a type of exit entailing a zero exit code
1615 under the host operating system's conventions, then this function
1616 returns zero rather than a non-zero value. This bug, [perl #2754],
1617 leads to C<perl_run> being called (and therefore C<INIT> blocks and the
1618 main program running) despite a call to C<exit>. It has been preserved
1619 because a popular module-installing module has come to rely on it and
1620 needs time to be fixed. This issue is [perl #132577], and the original
1621 bug is due to be fixed in Perl 5.30.
1626 #define SET_CURSTASH(newstash) \
1627 if (PL_curstash != newstash) { \
1628 SvREFCNT_dec(PL_curstash); \
1629 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1633 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1640 PERL_ARGS_ASSERT_PERL_PARSE;
1641 #ifndef MULTIPLICITY
1642 PERL_UNUSED_ARG(my_perl);
1644 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1646 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1648 if (s && strEQ(s, "1")) {
1649 const unsigned char *seed= PERL_HASH_SEED;
1650 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1651 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1652 while (seed < seed_end) {
1653 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1655 #ifdef PERL_HASH_RANDOMIZE_KEYS
1656 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1657 PL_HASH_RAND_BITS_ENABLED,
1658 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1660 PerlIO_printf(Perl_debug_log, "\n");
1663 #endif /* #if (defined(USE_HASH_SEED) ... */
1667 struct NameTranslationInfo nti;
1668 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1675 for(i = 0; i != argc; i++)
1677 assert(!argv[argc]);
1682 if (PL_origalen != 0) {
1683 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1686 /* Set PL_origalen be the sum of the contiguous argv[]
1687 * elements plus the size of the env in case that it is
1688 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1689 * as the maximum modifiable length of $0. In the worst case
1690 * the area we are able to modify is limited to the size of
1691 * the original argv[0]. (See below for 'contiguous', though.)
1693 const char *s = NULL;
1694 const UV mask = ~(UV)(PTRSIZE-1);
1695 /* Do the mask check only if the args seem like aligned. */
1697 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1699 /* See if all the arguments are contiguous in memory. Note
1700 * that 'contiguous' is a loose term because some platforms
1701 * align the argv[] and the envp[]. If the arguments look
1702 * like non-aligned, assume that they are 'strictly' or
1703 * 'traditionally' contiguous. If the arguments look like
1704 * aligned, we just check that they are within aligned
1705 * PTRSIZE bytes. As long as no system has something bizarre
1706 * like the argv[] interleaved with some other data, we are
1707 * fine. (Did I just evoke Murphy's Law?) --jhi */
1708 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1711 for (i = 1; i < PL_origargc; i++) {
1712 if ((PL_origargv[i] == s + 1
1714 || PL_origargv[i] == s + 2
1719 (PL_origargv[i] > s &&
1721 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1732 #ifndef PERL_USE_SAFE_PUTENV
1733 /* Can we grab env area too to be used as the area for $0? */
1734 if (s && PL_origenviron && !PL_use_safe_putenv) {
1735 if ((PL_origenviron[0] == s + 1)
1738 (PL_origenviron[0] > s &&
1739 PL_origenviron[0] <=
1740 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1744 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1745 s = PL_origenviron[0];
1748 my_setenv("NoNe SuCh", NULL);
1749 /* Force copy of environment. */
1750 for (i = 1; PL_origenviron[i]; i++) {
1751 if (PL_origenviron[i] == s + 1
1754 (PL_origenviron[i] > s &&
1755 PL_origenviron[i] <=
1756 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1759 s = PL_origenviron[i];
1767 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1769 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1774 /* Come here if running an undumped a.out. */
1776 PL_origfilename = savepv(argv[0]);
1777 PL_do_undump = FALSE;
1778 cxstack_ix = -1; /* start label stack again */
1780 assert (!TAINT_get);
1784 init_postdump_symbols(argc,argv,env);
1789 op_free(PL_main_root);
1790 PL_main_root = NULL;
1792 PL_main_start = NULL;
1793 SvREFCNT_dec(PL_main_cv);
1797 oldscope = PL_scopestack_ix;
1798 PL_dowarn = G_WARN_OFF;
1803 parse_body(env,xsinit);
1804 if (PL_unitcheckav) {
1805 call_list(oldscope, PL_unitcheckav);
1808 PERL_SET_PHASE(PERL_PHASE_CHECK);
1809 call_list(oldscope, PL_checkav);
1817 /* my_exit() was called */
1818 while (PL_scopestack_ix > oldscope)
1821 SET_CURSTASH(PL_defstash);
1822 if (PL_unitcheckav) {
1823 call_list(oldscope, PL_unitcheckav);
1826 PERL_SET_PHASE(PERL_PHASE_CHECK);
1827 call_list(oldscope, PL_checkav);
1832 * At this point we should do
1834 * to avoid [perl #2754], but that bugfix has been postponed
1835 * because of the Module::Install breakage it causes
1841 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1849 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1850 miniperl, and we need to see those flags reflected in the values here. */
1852 /* What this returns is subject to change. Use the public interface in Config.
1855 S_Internals_V(pTHX_ CV *cv)
1858 #ifdef LOCAL_PATCH_COUNT
1859 const int local_patch_count = LOCAL_PATCH_COUNT;
1861 const int local_patch_count = 0;
1863 const int entries = 3 + local_patch_count;
1865 static const char non_bincompat_options[] =
1872 # ifdef NO_HASH_SEED
1875 # ifdef NO_TAINT_SUPPORT
1878 # ifdef PERL_BOOL_AS_CHAR
1879 " PERL_BOOL_AS_CHAR"
1881 # ifdef PERL_COPY_ON_WRITE
1882 " PERL_COPY_ON_WRITE"
1884 # ifdef PERL_DISABLE_PMC
1887 # ifdef PERL_DONT_CREATE_GVSV
1888 " PERL_DONT_CREATE_GVSV"
1890 # ifdef PERL_EXTERNAL_GLOB
1891 " PERL_EXTERNAL_GLOB"
1893 # ifdef PERL_HASH_FUNC_SIPHASH
1894 " PERL_HASH_FUNC_SIPHASH"
1896 # ifdef PERL_HASH_FUNC_SDBM
1897 " PERL_HASH_FUNC_SDBM"
1899 # ifdef PERL_HASH_FUNC_DJB2
1900 " PERL_HASH_FUNC_DJB2"
1902 # ifdef PERL_HASH_FUNC_SUPERFAST
1903 " PERL_HASH_FUNC_SUPERFAST"
1905 # ifdef PERL_HASH_FUNC_MURMUR3
1906 " PERL_HASH_FUNC_MURMUR3"
1908 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1909 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1911 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1912 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1914 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1915 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1917 # ifdef PERL_IS_MINIPERL
1920 # ifdef PERL_MALLOC_WRAP
1923 # ifdef PERL_MEM_LOG
1926 # ifdef PERL_MEM_LOG_NOIMPL
1927 " PERL_MEM_LOG_NOIMPL"
1929 # ifdef PERL_OP_PARENT
1932 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1933 " PERL_PERTURB_KEYS_DETERMINISTIC"
1935 # ifdef PERL_PERTURB_KEYS_DISABLED
1936 " PERL_PERTURB_KEYS_DISABLED"
1938 # ifdef PERL_PERTURB_KEYS_RANDOM
1939 " PERL_PERTURB_KEYS_RANDOM"
1941 # ifdef PERL_PRESERVE_IVUV
1942 " PERL_PRESERVE_IVUV"
1944 # ifdef PERL_RELOCATABLE_INCPUSH
1945 " PERL_RELOCATABLE_INCPUSH"
1947 # ifdef PERL_USE_DEVEL
1950 # ifdef PERL_USE_SAFE_PUTENV
1951 " PERL_USE_SAFE_PUTENV"
1953 # ifdef SILENT_NO_TAINT_SUPPORT
1954 " SILENT_NO_TAINT_SUPPORT"
1956 # ifdef UNLINK_ALL_VERSIONS
1957 " UNLINK_ALL_VERSIONS"
1959 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1960 " USE_ATTRIBUTES_FOR_PERLIO"
1962 # ifdef USE_FAST_STDIO
1968 # ifdef USE_LOCALE_CTYPE
1971 # ifdef WIN32_NO_REGISTRY
1974 # ifdef USE_PERL_ATOF
1977 # ifdef USE_SITECUSTOMIZE
1978 " USE_SITECUSTOMIZE"
1981 PERL_UNUSED_ARG(cv);
1982 PERL_UNUSED_VAR(items);
1984 EXTEND(SP, entries);
1986 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1987 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1988 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1990 #ifndef PERL_BUILD_DATE
1993 # define PERL_BUILD_DATE __DATE__ " " __TIME__
1995 # define PERL_BUILD_DATE __DATE__
2000 #ifdef PERL_BUILD_DATE
2001 PUSHs(Perl_newSVpvn_flags(aTHX_
2002 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
2005 PUSHs(&PL_sv_undef);
2008 for (i = 1; i <= local_patch_count; i++) {
2009 /* This will be an undef, if PL_localpatches[i] is NULL. */
2010 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
2016 #define INCPUSH_UNSHIFT 0x01
2017 #define INCPUSH_ADD_OLD_VERS 0x02
2018 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
2019 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
2020 #define INCPUSH_NOT_BASEDIR 0x10
2021 #define INCPUSH_CAN_RELOCATE 0x20
2022 #define INCPUSH_ADD_SUB_DIRS \
2023 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
2026 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
2030 int argc = PL_origargc;
2031 char **argv = PL_origargv;
2032 const char *scriptname = NULL;
2033 bool dosearch = FALSE;
2035 bool doextract = FALSE;
2036 const char *cddir = NULL;
2037 #ifdef USE_SITECUSTOMIZE
2038 bool minus_f = FALSE;
2040 SV *linestr_sv = NULL;
2041 bool add_read_e_script = FALSE;
2042 U32 lex_start_flags = 0;
2044 PERL_SET_PHASE(PERL_PHASE_START);
2050 for (argc--,argv++; argc > 0; argc--,argv++) {
2051 if (argv[0][0] != '-' || !argv[0][1])
2057 #ifndef PERL_STRICT_CR
2081 if ((s = moreswitches(s)))
2086 #if defined(SILENT_NO_TAINT_SUPPORT)
2087 /* silently ignore */
2088 #elif defined(NO_TAINT_SUPPORT)
2089 Perl_croak_nocontext("This perl was compiled without taint support. "
2090 "Cowardly refusing to run with -t or -T flags");
2092 CHECK_MALLOC_TOO_LATE_FOR('t');
2093 if( !TAINTING_get ) {
2094 TAINT_WARN_set(TRUE);
2101 #if defined(SILENT_NO_TAINT_SUPPORT)
2102 /* silently ignore */
2103 #elif defined(NO_TAINT_SUPPORT)
2104 Perl_croak_nocontext("This perl was compiled without taint support. "
2105 "Cowardly refusing to run with -t or -T flags");
2107 CHECK_MALLOC_TOO_LATE_FOR('T');
2109 TAINT_WARN_set(FALSE);
2118 forbid_setid('e', FALSE);
2120 PL_e_script = newSVpvs("");
2121 add_read_e_script = TRUE;
2124 sv_catpv(PL_e_script, s);
2126 sv_catpv(PL_e_script, argv[1]);
2130 Perl_croak(aTHX_ "No code specified for -%c", c);
2131 sv_catpvs(PL_e_script, "\n");
2135 #ifdef USE_SITECUSTOMIZE
2141 case 'I': /* -I handled both here and in moreswitches() */
2142 forbid_setid('I', FALSE);
2143 if (!*++s && (s=argv[1]) != NULL) {
2147 STRLEN len = strlen(s);
2148 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2151 Perl_croak(aTHX_ "No directory specified for -I");
2154 forbid_setid('S', FALSE);
2163 opts_prog = newSVpvs("use Config; Config::_V()");
2167 opts_prog = Perl_newSVpvf(aTHX_
2168 "use Config; Config::config_vars(qw%c%s%c)",
2172 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2173 /* don't look for script or read stdin */
2174 scriptname = BIT_BUCKET;
2186 if (!*++s || isSPACE(*s)) {
2190 /* catch use of gnu style long options.
2191 Both of these exit immediately. */
2192 if (strEQ(s, "version"))
2194 if (strEQ(s, "help"))
2199 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2210 #ifndef SECURE_INTERNAL_GETENV
2213 (s = PerlEnv_getenv("PERL5OPT")))
2215 /* s points to static memory in getenv(), which may be overwritten at
2216 * any time; use a mortal copy instead */
2217 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2221 if (*s == '-' && *(s+1) == 'T') {
2222 #if defined(SILENT_NO_TAINT_SUPPORT)
2223 /* silently ignore */
2224 #elif defined(NO_TAINT_SUPPORT)
2225 Perl_croak_nocontext("This perl was compiled without taint support. "
2226 "Cowardly refusing to run with -t or -T flags");
2228 CHECK_MALLOC_TOO_LATE_FOR('T');
2230 TAINT_WARN_set(FALSE);
2234 char *popt_copy = NULL;
2247 if (!strchr("CDIMUdmtwW", *s))
2248 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2252 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2253 s = popt_copy + (s - d);
2261 #if defined(SILENT_NO_TAINT_SUPPORT)
2262 /* silently ignore */
2263 #elif defined(NO_TAINT_SUPPORT)
2264 Perl_croak_nocontext("This perl was compiled without taint support. "
2265 "Cowardly refusing to run with -t or -T flags");
2267 if( !TAINTING_get) {
2268 TAINT_WARN_set(TRUE);
2280 #ifndef NO_PERL_INTERNAL_RAND_SEED
2281 /* If we're not set[ug]id, we might have honored
2282 PERL_INTERNAL_RAND_SEED in perl_construct().
2283 At this point command-line options have been parsed, so if
2284 we're now tainting and not set[ug]id re-seed.
2285 This could possibly be wasteful if PERL_INTERNAL_RAND_SEED is invalid,
2286 but avoids duplicating the logic from perl_construct().
2289 PerlProc_getuid() == PerlProc_geteuid() &&
2290 PerlProc_getgid() == PerlProc_getegid()) {
2291 Perl_drand48_init_r(&PL_internal_random_state, seed());
2295 /* Set $^X early so that it can be used for relocatable paths in @INC */
2296 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2297 assert (!TAINT_get);
2302 #if defined(USE_SITECUSTOMIZE)
2304 /* The games with local $! are to avoid setting errno if there is no
2305 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2306 ie a q() operator with a NUL byte as a the delimiter. This avoids
2307 problems with pathnames containing (say) ' */
2308 # ifdef PERL_IS_MINIPERL
2309 AV *const inc = GvAV(PL_incgv);
2310 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2313 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2314 it should be reported immediately as a build failure. */
2315 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2317 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2318 "do {local $!; -f $f }"
2319 " and do $f || die $@ || qq '$f: $!' }",
2320 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2323 /* SITELIB_EXP is a function call on Win32. */
2324 const char *const raw_sitelib = SITELIB_EXP;
2326 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2327 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2328 INCPUSH_CAN_RELOCATE);
2329 const char *const sitelib = SvPVX(sitelib_sv);
2330 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2332 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2333 0, SVfARG(sitelib), 0,
2334 0, SVfARG(sitelib), 0));
2335 assert (SvREFCNT(sitelib_sv) == 1);
2336 SvREFCNT_dec(sitelib_sv);
2343 scriptname = argv[0];
2346 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2348 else if (scriptname == NULL) {
2350 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2356 assert (!TAINT_get);
2360 bool suidscript = FALSE;
2362 rsfp = open_script(scriptname, dosearch, &suidscript);
2364 rsfp = PerlIO_stdin();
2365 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2368 validate_suid(rsfp);
2371 # if defined(SIGCHLD) || defined(SIGCLD)
2374 # define SIGCHLD SIGCLD
2376 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2377 if (sigstate == (Sighandler_t) SIG_IGN) {
2378 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2379 "Can't ignore signal CHLD, forcing to default");
2380 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2388 /* This will croak if suidscript is true, as -x cannot be used with
2390 forbid_setid('x', suidscript);
2391 /* Hence you can't get here if suidscript is true */
2393 linestr_sv = newSV_type(SVt_PV);
2394 lex_start_flags |= LEX_START_COPIED;
2395 find_beginning(linestr_sv, rsfp);
2396 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2397 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2401 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2402 CvUNIQUE_on(PL_compcv);
2404 CvPADLIST_set(PL_compcv, pad_new(0));
2406 PL_isarev = newHV();
2409 boot_core_UNIVERSAL();
2411 newXS("Internals::V", S_Internals_V, __FILE__);
2414 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2416 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2422 # ifdef HAS_SOCKS5_INIT
2423 socks5_init(argv[0]);
2429 init_predump_symbols();
2430 /* init_postdump_symbols not currently designed to be called */
2431 /* more than once (ENV isn't cleared first, for example) */
2432 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2434 init_postdump_symbols(argc,argv,env);
2436 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2437 * or explicitly in some platforms.
2438 * PL_utf8locale is conditionally turned on by
2439 * locale.c:Perl_init_i18nl10n() if the environment
2440 * look like the user wants to use UTF-8. */
2441 #if defined(__SYMBIAN32__)
2442 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2444 # ifndef PERL_IS_MINIPERL
2446 /* Requires init_predump_symbols(). */
2447 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2452 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2453 * and the default open disciplines. */
2454 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2455 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2457 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2458 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2459 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2461 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2462 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2463 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2465 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2466 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2467 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2469 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2470 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2473 sv_setpvs(sv, ":utf8\0:utf8");
2475 sv_setpvs(sv, ":utf8\0");
2478 sv_setpvs(sv, "\0:utf8");
2487 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2488 if (strEQ(s, "unsafe"))
2489 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2490 else if (strEQ(s, "safe"))
2491 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2493 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2498 lex_start(linestr_sv, rsfp, lex_start_flags);
2499 SvREFCNT_dec(linestr_sv);
2501 PL_subname = newSVpvs("main");
2503 if (add_read_e_script)
2504 filter_add(read_e_script, NULL);
2506 /* now parse the script */
2508 SETERRNO(0,SS_NORMAL);
2509 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2510 abort_execution("", PL_origfilename);
2512 CopLINE_set(PL_curcop, 0);
2513 SET_CURSTASH(PL_defstash);
2515 SvREFCNT_dec(PL_e_script);
2523 SAVECOPFILE(PL_curcop);
2524 SAVECOPLINE(PL_curcop);
2525 gv_check(PL_defstash);
2535 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2536 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2537 dump_mstats("after compilation:");
2542 PL_restartjmpenv = NULL;
2548 =for apidoc Am|int|perl_run|PerlInterpreter *my_perl
2550 Tells a Perl interpreter to run its main program. See L<perlembed>
2553 C<my_perl> points to the Perl interpreter. It must have been previously
2554 created through the use of L</perl_alloc> and L</perl_construct>, and
2555 initialised through L</perl_parse>. This function should not be called
2556 if L</perl_parse> returned a non-zero value, indicating a failure in
2557 initialisation or compilation.
2559 This function executes code in C<INIT> blocks, and then executes the
2560 main program. The code to be executed is that established by the prior
2561 call to L</perl_parse>. If the interpreter's C<PL_exit_flags> word
2562 does not have the C<PERL_EXIT_DESTRUCT_END> flag set, then this function
2563 will also execute code in C<END> blocks. If it is desired to make any
2564 further use of the interpreter after calling this function, then C<END>
2565 blocks should be postponed to L</perl_destruct> time by setting that flag.
2567 Returns an integer of slightly tricky interpretation. The correct use
2568 of the return value is as a truth value indicating whether the program
2569 terminated non-locally. If zero is returned, this indicates that
2570 the program ran to completion, and it is safe to make other use of the
2571 interpreter (provided that the C<PERL_EXIT_DESTRUCT_END> flag was set as
2572 described above). If a non-zero value is returned, this indicates that
2573 the interpreter wants to terminate early. The interpreter should not be
2574 just abandoned because of this desire to terminate; the caller should
2575 proceed to shut the interpreter down cleanly with L</perl_destruct>
2576 and free it with L</perl_free>.
2578 For historical reasons, the non-zero return value also attempts to
2579 be a suitable value to pass to the C library function C<exit> (or to
2580 return from C<main>), to serve as an exit code indicating the nature of
2581 the way the program terminated. However, this isn't portable, due to
2582 differing exit code conventions. An attempt is made to return an exit
2583 code of the type required by the host operating system, but because
2584 it is constrained to be non-zero, it is not necessarily possible to
2585 indicate every type of exit. It is only reliable on Unix, where a zero
2586 exit code can be augmented with a set bit that will be ignored. In any
2587 case, this function is not the correct place to acquire an exit code:
2588 one should get that from L</perl_destruct>.
2597 int ret = 0, exit_called = 0;
2600 PERL_ARGS_ASSERT_PERL_RUN;
2601 #ifndef MULTIPLICITY
2602 PERL_UNUSED_ARG(my_perl);
2605 oldscope = PL_scopestack_ix;
2613 cxstack_ix = -1; /* start context stack again */
2615 case 0: /* normal completion */
2619 case 2: /* my_exit() */
2622 while (PL_scopestack_ix > oldscope)
2625 SET_CURSTASH(PL_defstash);
2626 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2627 PL_endav && !PL_minus_c) {
2628 PERL_SET_PHASE(PERL_PHASE_END);
2629 call_list(oldscope, PL_endav);
2632 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2633 dump_mstats("after execution: ");
2637 if (ret == 0) ret = 0x100;
2644 POPSTACK_TO(PL_mainstack);
2647 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2658 S_run_body(pTHX_ I32 oldscope)
2660 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2661 PL_sawampersand ? "Enabling" : "Omitting",
2662 (unsigned int)(PL_sawampersand)));
2664 if (!PL_restartop) {
2666 if (DEBUG_x_TEST || DEBUG_B_TEST)
2667 dump_all_perl(!DEBUG_B_TEST);
2669 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2673 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2676 if (PERLDB_SINGLE && PL_DBsingle)
2679 PERL_SET_PHASE(PERL_PHASE_INIT);
2680 call_list(oldscope, PL_initav);
2682 #ifdef PERL_DEBUG_READONLY_OPS
2683 if (PL_main_root && PL_main_root->op_slabbed)
2684 Slab_to_ro(OpSLAB(PL_main_root));
2690 PERL_SET_PHASE(PERL_PHASE_RUN);
2693 PL_restartjmpenv = NULL;
2694 PL_op = PL_restartop;
2698 else if (PL_main_start) {
2699 CvDEPTH(PL_main_cv) = 1;
2700 PL_op = PL_main_start;
2704 NOT_REACHED; /* NOTREACHED */
2708 =head1 SV Manipulation Functions
2710 =for apidoc p||get_sv
2712 Returns the SV of the specified Perl scalar. C<flags> are passed to
2713 C<gv_fetchpv>. If C<GV_ADD> is set and the
2714 Perl variable does not exist then it will be created. If C<flags> is zero
2715 and the variable does not exist then NULL is returned.
2721 Perl_get_sv(pTHX_ const char *name, I32 flags)
2725 PERL_ARGS_ASSERT_GET_SV;
2727 gv = gv_fetchpv(name, flags, SVt_PV);
2734 =head1 Array Manipulation Functions
2736 =for apidoc p||get_av
2738 Returns the AV of the specified Perl global or package array with the given
2739 name (so it won't work on lexical variables). C<flags> are passed
2740 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2741 Perl variable does not exist then it will be created. If C<flags> is zero
2742 and the variable does not exist then NULL is returned.
2744 Perl equivalent: C<@{"$name"}>.
2750 Perl_get_av(pTHX_ const char *name, I32 flags)
2752 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2754 PERL_ARGS_ASSERT_GET_AV;
2764 =head1 Hash Manipulation Functions
2766 =for apidoc p||get_hv
2768 Returns the HV of the specified Perl hash. C<flags> are passed to
2769 C<gv_fetchpv>. If C<GV_ADD> is set and the
2770 Perl variable does not exist then it will be created. If C<flags> is zero
2771 and the variable does not exist then C<NULL> is returned.
2777 Perl_get_hv(pTHX_ const char *name, I32 flags)
2779 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2781 PERL_ARGS_ASSERT_GET_HV;
2791 =head1 CV Manipulation Functions
2793 =for apidoc p||get_cvn_flags
2795 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2796 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2797 exist then it will be declared (which has the same effect as saying
2798 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2799 then NULL is returned.
2801 =for apidoc p||get_cv
2803 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2809 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2811 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2813 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2815 if (gv && UNLIKELY(SvROK(gv)) && SvTYPE(SvRV((SV *)gv)) == SVt_PVCV)
2816 return (CV*)SvRV((SV *)gv);
2818 /* XXX this is probably not what they think they're getting.
2819 * It has the same effect as "sub name;", i.e. just a forward
2821 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2822 return newSTUB(gv,0);
2829 /* Nothing in core calls this now, but we can't replace it with a macro and
2830 move it to mathoms.c as a macro would evaluate name twice. */
2832 Perl_get_cv(pTHX_ const char *name, I32 flags)
2834 PERL_ARGS_ASSERT_GET_CV;
2836 return get_cvn_flags(name, strlen(name), flags);
2839 /* Be sure to refetch the stack pointer after calling these routines. */
2843 =head1 Callback Functions
2845 =for apidoc p||call_argv
2847 Performs a callback to the specified named and package-scoped Perl subroutine
2848 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2851 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2857 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2859 /* See G_* flags in cop.h */
2860 /* null terminated arg list */
2864 PERL_ARGS_ASSERT_CALL_ARGV;
2868 mXPUSHs(newSVpv(*argv,0));
2872 return call_pv(sub_name, flags);
2876 =for apidoc p||call_pv
2878 Performs a callback to the specified Perl sub. See L<perlcall>.
2884 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2885 /* name of the subroutine */
2886 /* See G_* flags in cop.h */
2888 PERL_ARGS_ASSERT_CALL_PV;
2890 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2894 =for apidoc p||call_method
2896 Performs a callback to the specified Perl method. The blessed object must
2897 be on the stack. See L<perlcall>.
2903 Perl_call_method(pTHX_ const char *methname, I32 flags)
2904 /* name of the subroutine */
2905 /* See G_* flags in cop.h */
2909 PERL_ARGS_ASSERT_CALL_METHOD;
2911 len = strlen(methname);
2912 sv = flags & G_METHOD_NAMED
2913 ? sv_2mortal(newSVpvn_share(methname, len,0))
2914 : newSVpvn_flags(methname, len, SVs_TEMP);
2916 return call_sv(sv, flags | G_METHOD);
2919 /* May be called with any of a CV, a GV, or an SV containing the name. */
2921 =for apidoc p||call_sv
2923 Performs a callback to the Perl sub specified by the SV.
2925 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2926 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2927 or C<SvPV(sv)> will be used as the name of the sub to call.
2929 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2930 C<SvPV(sv)> will be used as the name of the method to call.
2932 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2933 the name of the method to call.
2935 Some other values are treated specially for internal use and should
2944 Perl_call_sv(pTHX_ SV *sv, volatile I32 flags)
2945 /* See G_* flags in cop.h */
2948 LOGOP myop; /* fake syntax tree node */
2951 volatile I32 retval = 0;
2952 bool oldcatch = CATCH_GET;
2954 OP* const oldop = PL_op;
2957 PERL_ARGS_ASSERT_CALL_SV;
2959 if (flags & G_DISCARD) {
2963 if (!(flags & G_WANT)) {
2964 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2969 Zero(&myop, 1, LOGOP);
2970 if (!(flags & G_NOARGS))
2971 myop.op_flags |= OPf_STACKED;
2972 myop.op_flags |= OP_GIMME_REVERSE(flags);
2976 if (!(flags & G_METHOD_NAMED)) {
2984 if (PERLDB_SUB && PL_curstash != PL_debstash
2985 /* Handle first BEGIN of -d. */
2986 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2987 /* Try harder, since this may have been a sighandler, thus
2988 * curstash may be meaningless. */
2989 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2990 && !(flags & G_NODEBUG))
2991 myop.op_private |= OPpENTERSUB_DB;
2993 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2994 Zero(&method_op, 1, METHOP);
2995 method_op.op_next = (OP*)&myop;
2996 PL_op = (OP*)&method_op;
2997 if ( flags & G_METHOD_NAMED ) {
2998 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2999 method_op.op_type = OP_METHOD_NAMED;
3000 method_op.op_u.op_meth_sv = sv;
3002 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
3003 method_op.op_type = OP_METHOD;
3005 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
3006 myop.op_type = OP_ENTERSUB;
3009 if (!(flags & G_EVAL)) {
3011 CALL_BODY_SUB((OP*)&myop);
3012 retval = PL_stack_sp - (PL_stack_base + oldmark);
3013 CATCH_SET(oldcatch);
3017 myop.op_other = (OP*)&myop;
3019 old_cxix = cxstack_ix;
3020 create_eval_scope(NULL, flags|G_FAKINGEVAL);
3028 CALL_BODY_SUB((OP*)&myop);
3029 retval = PL_stack_sp - (PL_stack_base + oldmark);
3030 if (!(flags & G_KEEPERR)) {
3038 /* my_exit() was called */
3039 SET_CURSTASH(PL_defstash);
3043 NOT_REACHED; /* NOTREACHED */
3046 PL_restartjmpenv = NULL;
3047 PL_op = PL_restartop;
3051 PL_stack_sp = PL_stack_base + oldmark;
3052 if ((flags & G_WANT) == G_ARRAY)
3056 *++PL_stack_sp = &PL_sv_undef;
3061 /* if we croaked, depending on how we croaked the eval scope
3062 * may or may not have already been popped */
3063 if (cxstack_ix > old_cxix) {
3064 assert(cxstack_ix == old_cxix + 1);
3065 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
3066 delete_eval_scope();
3071 if (flags & G_DISCARD) {
3072 PL_stack_sp = PL_stack_base + oldmark;
3081 /* Eval a string. The G_EVAL flag is always assumed. */
3084 =for apidoc p||eval_sv
3086 Tells Perl to C<eval> the string in the SV. It supports the same flags
3087 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
3093 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
3095 /* See G_* flags in cop.h */
3098 UNOP myop; /* fake syntax tree node */
3099 volatile I32 oldmark;
3100 volatile I32 retval = 0;
3102 OP* const oldop = PL_op;
3105 PERL_ARGS_ASSERT_EVAL_SV;
3107 if (flags & G_DISCARD) {
3114 Zero(&myop, 1, UNOP);
3117 oldmark = SP - PL_stack_base;
3123 if (!(flags & G_NOARGS))
3124 myop.op_flags = OPf_STACKED;
3125 myop.op_type = OP_ENTEREVAL;
3126 myop.op_flags |= OP_GIMME_REVERSE(flags);
3127 if (flags & G_KEEPERR)
3128 myop.op_flags |= OPf_SPECIAL;
3130 if (flags & G_RE_REPARSING)
3131 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
3133 /* fail now; otherwise we could fail after the JMPENV_PUSH but
3134 * before a cx_pusheval(), which corrupts the stack after a croak */
3135 TAINT_PROPER("eval_sv()");
3141 if (PL_op == (OP*)(&myop)) {
3142 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
3144 goto fail; /* failed in compilation */
3147 retval = PL_stack_sp - (PL_stack_base + oldmark);
3148 if (!(flags & G_KEEPERR)) {
3156 /* my_exit() was called */
3157 SET_CURSTASH(PL_defstash);
3161 NOT_REACHED; /* NOTREACHED */
3164 PL_restartjmpenv = NULL;
3165 PL_op = PL_restartop;
3170 PL_stack_sp = PL_stack_base + oldmark;
3171 if ((flags & G_WANT) == G_ARRAY)
3175 *++PL_stack_sp = &PL_sv_undef;
3181 if (flags & G_DISCARD) {
3182 PL_stack_sp = PL_stack_base + oldmark;
3192 =for apidoc p||eval_pv
3194 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3200 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3202 SV* sv = newSVpv(p, 0);
3204 PERL_ARGS_ASSERT_EVAL_PV;
3206 eval_sv(sv, G_SCALAR);
3215 /* just check empty string or undef? */
3216 if (croak_on_error) {
3217 SV * const errsv = ERRSV;
3218 if(SvTRUE_NN(errsv))
3219 /* replace with croak_sv? */
3220 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3226 /* Require a module. */
3229 =head1 Embedding Functions
3231 =for apidoc p||require_pv
3233 Tells Perl to C<require> the file named by the string argument. It is
3234 analogous to the Perl code C<eval "require '$file'">. It's even
3235 implemented that way; consider using load_module instead.
3240 Perl_require_pv(pTHX_ const char *pv)
3245 PERL_ARGS_ASSERT_REQUIRE_PV;
3247 PUSHSTACKi(PERLSI_REQUIRE);
3248 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3249 eval_sv(sv_2mortal(sv), G_DISCARD);
3254 S_usage(pTHX) /* XXX move this out into a module ? */
3256 /* This message really ought to be max 23 lines.
3257 * Removed -h because the user already knows that option. Others? */
3259 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3260 minimum of 509 character string literals. */
3261 static const char * const usage_msg[] = {
3262 " -0[octal] specify record separator (\\0, if no argument)\n"
3263 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3264 " -C[number/list] enables the listed Unicode features\n"
3265 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3266 " -d[:debugger] run program under debugger\n"
3267 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3268 " -e program one line of program (several -e's allowed, omit programfile)\n"
3269 " -E program like -e, but enables all optional features\n"
3270 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3271 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3272 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3273 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3274 " -l[octal] enable line ending processing, specifies line terminator\n"
3275 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3276 " -n assume \"while (<>) { ... }\" loop around program\n"
3277 " -p assume loop like -n but print line also, like sed\n"
3278 " -s enable rudimentary parsing for switches after programfile\n"
3279 " -S look for programfile using PATH environment variable\n",
3280 " -t enable tainting warnings\n"
3281 " -T enable tainting checks\n"
3282 " -u dump core after parsing program\n"
3283 " -U allow unsafe operations\n"
3284 " -v print version, patchlevel and license\n"
3285 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3286 " -w enable many useful warnings\n"
3287 " -W enable all warnings\n"
3288 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3289 " -X disable all warnings\n"
3291 "Run 'perldoc perl' for more help with Perl.\n\n",
3294 const char * const *p = usage_msg;
3295 PerlIO *out = PerlIO_stdout();
3298 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3301 PerlIO_puts(out, *p++);
3305 /* convert a string of -D options (or digits) into an int.
3306 * sets *s to point to the char after the options */
3310 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3312 static const char * const usage_msgd[] = {
3313 " Debugging flag values: (see also -d)\n"
3314 " p Tokenizing and parsing (with v, displays parse stack)\n"
3315 " s Stack snapshots (with v, displays all stacks)\n"
3316 " l Context (loop) stack processing\n"
3317 " t Trace execution\n"
3318 " o Method and overloading resolution\n",
3319 " c String/numeric conversions\n"
3320 " P Print profiling info, source file input state\n"
3321 " m Memory and SV allocation\n"
3322 " f Format processing\n"
3323 " r Regular expression parsing and execution\n"
3324 " x Syntax tree dump\n",
3325 " u Tainting checks\n"
3326 " H Hash dump -- usurps values()\n"
3327 " X Scratchpad allocation\n"
3329 " S Op slab allocation\n"
3331 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3332 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3333 " v Verbose: use in conjunction with other flags\n"
3334 " C Copy On Write\n"
3335 " A Consistency checks on internal structures\n"
3336 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3337 " M trace smart match resolution\n"
3338 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3339 " L trace some locale setting information--for Perl core development\n",
3340 " i trace PerlIO layer processing\n",
3345 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3348 /* if adding extra options, remember to update DEBUG_MASK */
3349 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3351 for (; isWORDCHAR(**s); (*s)++) {
3352 const char * const d = strchr(debopts,**s);
3354 uv |= 1 << (d - debopts);
3355 else if (ckWARN_d(WARN_DEBUGGING))
3356 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3357 "invalid option -D%c, use -D'' to see choices\n", **s);
3360 else if (isDIGIT(**s)) {
3362 if (grok_atoUV(*s, &uv, &e))
3364 for (; isWORDCHAR(**s); (*s)++) ;
3366 else if (givehelp) {
3367 const char *const *p = usage_msgd;
3368 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3370 return (int)uv; /* ignore any UV->int conversion loss */
3374 /* This routine handles any switches that can be given during run */
3377 Perl_moreswitches(pTHX_ const char *s)
3381 const char option = *s; /* used to remember option in -m/-M code */
3383 PERL_ARGS_ASSERT_MORESWITCHES;
3391 SvREFCNT_dec(PL_rs);
3392 if (s[1] == 'x' && s[2]) {
3393 const char *e = s+=2;
3399 flags = PERL_SCAN_SILENT_ILLDIGIT;
3400 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3401 if (s + numlen < e) {
3402 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3406 PL_rs = newSVpvs("");
3407 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3408 uvchr_to_utf8(tmps, rschar);
3409 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3414 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3415 if (rschar & ~((U8)~0))
3416 PL_rs = &PL_sv_undef;
3417 else if (!rschar && numlen >= 2)
3418 PL_rs = newSVpvs("");
3420 char ch = (char)rschar;
3421 PL_rs = newSVpvn(&ch, 1);
3424 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3429 PL_unicode = parse_unicode_opts( (const char **)&s );
3430 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3438 while (*s && !isSPACE(*s)) ++s;
3439 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3451 forbid_setid('d', FALSE);
3454 /* -dt indicates to the debugger that threads will be used */
3455 if (*s == 't' && !isWORDCHAR(s[1])) {
3457 my_setenv("PERL5DB_THREADED", "1");
3460 /* The following permits -d:Mod to accepts arguments following an =
3461 in the fashion that -MSome::Mod does. */
3462 if (*s == ':' || *s == '=') {
3469 sv = newSVpvs("no Devel::");
3471 sv = newSVpvs("use Devel::");
3475 end = s + strlen(s);
3477 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3478 while(isWORDCHAR(*s) || *s==':') ++s;
3480 sv_catpvn(sv, start, end - start);
3482 sv_catpvn(sv, start, s-start);
3483 /* Don't use NUL as q// delimiter here, this string goes in the
3485 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3488 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3492 PL_perldb = PERLDB_ALL;
3499 forbid_setid('D', FALSE);
3501 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3502 #else /* !DEBUGGING */
3503 if (ckWARN_d(WARN_DEBUGGING))
3504 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3505 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3506 for (s++; isWORDCHAR(*s); s++) ;
3509 NOT_REACHED; /* NOTREACHED */
3513 NOT_REACHED; /* NOTREACHED */
3516 Safefree(PL_inplace);
3518 const char * const start = ++s;
3519 while (*s && !isSPACE(*s))
3522 PL_inplace = savepvn(start, s - start);
3525 case 'I': /* -I handled both here and in parse_body() */
3526 forbid_setid('I', FALSE);
3528 while (*s && isSPACE(*s))
3533 /* ignore trailing spaces (possibly followed by other switches) */
3535 for (e = p; *e && !isSPACE(*e); e++) ;
3539 } while (*p && *p != '-');
3541 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3547 Perl_croak(aTHX_ "No directory specified for -I");
3553 SvREFCNT_dec(PL_ors_sv);
3559 PL_ors_sv = newSVpvs("\n");
3560 numlen = 3 + (*s == '0');
3561 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3565 if (RsPARA(PL_rs)) {
3566 PL_ors_sv = newSVpvs("\n\n");
3569 PL_ors_sv = newSVsv(PL_rs);
3574 forbid_setid('M', FALSE); /* XXX ? */
3577 forbid_setid('m', FALSE); /* XXX ? */
3582 const char *use = "use ";
3584 /* -M-foo == 'no foo' */
3585 /* Leading space on " no " is deliberate, to make both
3586 possibilities the same length. */
3587 if (*s == '-') { use = " no "; ++s; }
3588 sv = newSVpvn(use,4);
3590 /* We allow -M'Module qw(Foo Bar)' */
3591 while(isWORDCHAR(*s) || *s==':') {
3600 Perl_croak(aTHX_ "Module name required with -%c option",
3603 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3604 "contains single ':'",
3605 (int)(s - start), start, option);
3606 end = s + strlen(s);
3608 sv_catpvn(sv, start, end - start);
3609 if (option == 'm') {
3611 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3612 sv_catpvs( sv, " ()");
3615 sv_catpvn(sv, start, s-start);
3616 /* Use NUL as q''-delimiter. */
3617 sv_catpvs(sv, " split(/,/,q\0");
3619 sv_catpvn(sv, s, end - s);
3620 sv_catpvs(sv, "\0)");
3623 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3626 Perl_croak(aTHX_ "Missing argument to -%c", option);
3637 forbid_setid('s', FALSE);
3638 PL_doswitches = TRUE;
3643 #if defined(SILENT_NO_TAINT_SUPPORT)
3644 /* silently ignore */
3645 #elif defined(NO_TAINT_SUPPORT)
3646 Perl_croak_nocontext("This perl was compiled without taint support. "
3647 "Cowardly refusing to run with -t or -T flags");
3655 PL_do_undump = TRUE;
3665 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3666 PL_dowarn |= G_WARN_ON;
3671 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3672 if (!specialWARN(PL_compiling.cop_warnings))
3673 PerlMemShared_free(PL_compiling.cop_warnings);
3674 PL_compiling.cop_warnings = pWARN_ALL ;
3678 PL_dowarn = G_WARN_ALL_OFF;
3679 if (!specialWARN(PL_compiling.cop_warnings))
3680 PerlMemShared_free(PL_compiling.cop_warnings);
3681 PL_compiling.cop_warnings = pWARN_NONE ;
3688 if (s[0] == '-') /* Additional switches on #! line. */
3693 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3699 #ifdef ALTERNATE_SHEBANG
3700 case 'S': /* OS/2 needs -S on "extproc" line. */
3703 case 'e': case 'f': case 'x': case 'E':
3704 #ifndef ALTERNATE_SHEBANG
3708 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3711 "Unrecognized switch: -%.1s (-h will show valid options)",s
3721 PerlIO * PIO_stdout;
3723 const char * const level_str = "v" PERL_VERSION_STRING;
3724 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3725 #ifdef PERL_PATCHNUM
3727 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3728 static const char num [] = PERL_PATCHNUM "*";
3730 static const char num [] = PERL_PATCHNUM;
3733 const STRLEN num_len = sizeof(num)-1;
3734 /* A very advanced compiler would fold away the strnEQ
3735 and this whole conditional, but most (all?) won't do it.
3736 SV level could also be replaced by with preprocessor
3739 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3740 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3741 of the interp so it might contain format characters
3743 level = newSVpvn(num, num_len);
3745 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3749 SV* level = newSVpvn(level_str, level_len);
3750 #endif /* #ifdef PERL_PATCHNUM */
3751 PIO_stdout = PerlIO_stdout();
3752 PerlIO_printf(PIO_stdout,
3753 "\nThis is perl " STRINGIFY(PERL_REVISION)
3754 ", version " STRINGIFY(PERL_VERSION)
3755 ", subversion " STRINGIFY(PERL_SUBVERSION)
3756 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3758 SvREFCNT_dec_NN(level);
3760 #if defined(LOCAL_PATCH_COUNT)
3761 if (LOCAL_PATCH_COUNT > 0)
3762 PerlIO_printf(PIO_stdout,
3763 "\n(with %d registered patch%s, "
3764 "see perl -V for more detail)",
3766 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3769 PerlIO_printf(PIO_stdout,
3770 "\n\nCopyright 1987-2018, Larry Wall\n");
3772 PerlIO_printf(PIO_stdout,
3773 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3776 PerlIO_printf(PIO_stdout,
3777 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3778 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3781 PerlIO_printf(PIO_stdout,
3782 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3783 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3786 PerlIO_printf(PIO_stdout,
3787 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3790 PerlIO_printf(PIO_stdout,
3791 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3794 PerlIO_printf(PIO_stdout,
3795 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3798 PerlIO_printf(PIO_stdout,
3799 "WINCE port by Rainer Keuchel, 2001-2002\n"
3800 "Built on " __DATE__ " " __TIME__ "\n\n");
3803 #ifdef __SYMBIAN32__
3804 PerlIO_printf(PIO_stdout,
3805 "Symbian port by Nokia, 2004-2005\n");
3807 #ifdef BINARY_BUILD_NOTICE
3808 BINARY_BUILD_NOTICE;
3810 PerlIO_printf(PIO_stdout,
3812 Perl may be copied only under the terms of either the Artistic License or the\n\
3813 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3814 Complete documentation for Perl, including FAQ lists, should be found on\n\
3815 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3816 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3820 /* compliments of Tom Christiansen */
3822 /* unexec() can be found in the Gnu emacs distribution */
3823 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3826 #include <lib$routines.h>
3830 Perl_my_unexec(pTHX)
3833 SV * prog = newSVpv(BIN_EXP, 0);
3834 SV * file = newSVpv(PL_origfilename, 0);
3838 sv_catpvs(prog, "/perl");
3839 sv_catpvs(file, ".perldump");
3841 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3842 /* unexec prints msg to stderr in case of failure */
3843 PerlProc_exit(status);
3845 PERL_UNUSED_CONTEXT;
3847 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3848 # elif defined(WIN32) || defined(__CYGWIN__)
3849 Perl_croak_nocontext("dump is not supported");
3851 ABORT(); /* for use with undump */
3856 /* initialize curinterp */
3861 # define PERLVAR(prefix,var,type)
3862 # define PERLVARA(prefix,var,n,type)
3863 # if defined(PERL_IMPLICIT_CONTEXT)
3864 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3865 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3867 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3868 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3870 # include "intrpvar.h"
3876 # define PERLVAR(prefix,var,type)
3877 # define PERLVARA(prefix,var,n,type)
3878 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3879 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3880 # include "intrpvar.h"
3890 S_init_main_stash(pTHX)
3895 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(hv);
3896 /* We know that the string "main" will be in the global shared string
3897 table, so it's a small saving to use it rather than allocate another
3899 PL_curstname = newSVpvs_share("main");
3900 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3901 /* If we hadn't caused another reference to "main" to be in the shared
3902 string table above, then it would be worth reordering these two,
3903 because otherwise all we do is delete "main" from it as a consequence
3904 of the SvREFCNT_dec, only to add it again with hv_name_set */
3905 SvREFCNT_dec(GvHV(gv));
3906 hv_name_sets(PL_defstash, "main", 0);
3907 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3909 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3911 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3912 GvMULTI_on(PL_incgv);
3913 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3914 SvREFCNT_inc_simple_void(PL_hintgv);
3915 GvMULTI_on(PL_hintgv);
3916 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3917 SvREFCNT_inc_simple_void(PL_defgv);
3918 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3919 SvREFCNT_inc_simple_void(PL_errgv);
3920 GvMULTI_on(PL_errgv);
3921 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3922 SvREFCNT_inc_simple_void(PL_replgv);
3923 GvMULTI_on(PL_replgv);
3924 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3925 #ifdef PERL_DONT_CREATE_GVSV
3926 (void)gv_SVadd(PL_errgv);
3928 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3930 CopSTASH_set(&PL_compiling, PL_defstash);
3931 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3932 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3934 /* We must init $/ before switches are processed. */
3935 sv_setpvs(get_sv("/", GV_ADD), "\n");
3939 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3942 PerlIO *rsfp = NULL;
3946 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3949 PL_origfilename = savepvs("-e");
3954 /* if find_script() returns, it returns a malloc()-ed value */
3955 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3957 if (strBEGINs(scriptname, "/dev/fd/")
3958 && isDIGIT(scriptname[8])
3959 && grok_atoUV(scriptname + 8, &uv, &s)
3960 && uv <= PERL_INT_MAX
3965 * Tell apart "normal" usage of fdscript, e.g.
3966 * with bash on FreeBSD:
3967 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3968 * from usage in suidperl.
3969 * Does any "normal" usage leave garbage after the number???
3970 * Is it a mistake to use a similar /dev/fd/ construct for
3975 * Be supersafe and do some sanity-checks.
3976 * Still, can we be sure we got the right thing?
3979 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3982 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3984 scriptname = savepv(s + 1);
3985 Safefree(PL_origfilename);
3986 PL_origfilename = (char *)scriptname;
3991 CopFILE_free(PL_curcop);
3992 CopFILE_set(PL_curcop, PL_origfilename);
3993 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3994 scriptname = (char *)"";
3995 if (fdscript >= 0) {
3996 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3998 else if (!*scriptname) {
3999 forbid_setid(0, *suidscript);
4003 #ifdef FAKE_BIT_BUCKET
4004 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
4005 * is called) and still have the "-e" work. (Believe it or not,
4006 * a /dev/null is required for the "-e" to work because source
4007 * filter magic is used to implement it. ) This is *not* a general
4008 * replacement for a /dev/null. What we do here is create a temp
4009 * file (an empty file), open up that as the script, and then
4010 * immediately close and unlink it. Close enough for jazz. */
4011 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
4012 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
4013 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
4014 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
4015 FAKE_BIT_BUCKET_TEMPLATE
4017 const char * const err = "Failed to create a fake bit bucket";
4018 if (strEQ(scriptname, BIT_BUCKET)) {
4019 int tmpfd = Perl_my_mkstemp_cloexec(tmpname);
4021 scriptname = tmpname;
4024 Perl_croak(aTHX_ err);
4027 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
4028 #ifdef FAKE_BIT_BUCKET
4029 if ( strBEGINs(scriptname, FAKE_BIT_BUCKET_PREFIX)
4030 && strlen(scriptname) == sizeof(tmpname) - 1)
4034 scriptname = BIT_BUCKET;
4038 /* PSz 16 Sep 03 Keep neat error message */
4040 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
4042 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4043 CopFILE(PL_curcop), Strerror(errno));
4045 fd = PerlIO_fileno(rsfp);
4048 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
4049 && S_ISDIR(tmpstatbuf.st_mode)))
4050 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
4057 /* In the days of suidperl, we refused to execute a setuid script stored on
4058 * a filesystem mounted nosuid and/or noexec. This meant that we probed for the
4059 * existence of the appropriate filesystem-statting function, and behaved
4060 * accordingly. But even though suidperl is long gone, we must still include
4061 * those probes for the benefit of modules like Filesys::Df, which expect the
4062 * results of those probes to be stored in %Config; see RT#126368. So mention
4063 * the relevant cpp symbols here, to ensure that metaconfig will include their
4064 * probes in the generated Configure:
4066 * I_SYSSTATVFS HAS_FSTATVFS
4068 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
4069 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
4073 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4074 /* Don't even need this function. */
4077 S_validate_suid(pTHX_ PerlIO *rsfp)
4079 const Uid_t my_uid = PerlProc_getuid();
4080 const Uid_t my_euid = PerlProc_geteuid();
4081 const Gid_t my_gid = PerlProc_getgid();
4082 const Gid_t my_egid = PerlProc_getegid();
4084 PERL_ARGS_ASSERT_VALIDATE_SUID;
4086 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
4088 int fd = PerlIO_fileno(rsfp);
4090 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
4091 Perl_croak_nocontext( "Illegal suidscript");
4093 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
4095 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
4098 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4099 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4100 /* not set-id, must be wrapped */
4103 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4106 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4111 PERL_ARGS_ASSERT_FIND_BEGINNING;
4113 /* skip forward in input to the real script? */
4116 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4117 Perl_croak(aTHX_ "No Perl script found in input\n");
4119 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
4120 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4121 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4123 while (*s == ' ' || *s == '\t') s++;
4125 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4126 || s2[-1] == '_') s2--;
4127 if (strBEGINs(s2-4,"perl"))
4128 while ((s = moreswitches(s)))
4137 /* no need to do anything here any more if we don't
4139 #ifndef NO_TAINT_SUPPORT
4140 const Uid_t my_uid = PerlProc_getuid();
4141 const Uid_t my_euid = PerlProc_geteuid();
4142 const Gid_t my_gid = PerlProc_getgid();
4143 const Gid_t my_egid = PerlProc_getegid();
4145 PERL_UNUSED_CONTEXT;
4147 /* Should not happen: */
4148 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
4149 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
4153 * Should go by suidscript, not uid!=euid: why disallow
4154 * system("ls") in scripts run from setuid things?
4155 * Or, is this run before we check arguments and set suidscript?
4156 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4157 * (We never have suidscript, can we be sure to have fdscript?)
4158 * Or must then go by UID checks? See comments in forbid_setid also.
4162 /* This is used very early in the lifetime of the program,
4163 * before even the options are parsed, so PL_tainting has
4164 * not been initialized properly. */
4166 Perl_doing_taint(int argc, char *argv[], char *envp[])
4168 #ifndef PERL_IMPLICIT_SYS
4169 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4170 * before we have an interpreter-- and the whole point of this
4171 * function is to be called at such an early stage. If you are on
4172 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4173 * "tainted because running with altered effective ids', you'll
4174 * have to add your own checks somewhere in here. The two most
4175 * known samples of 'implicitness' are Win32 and NetWare, neither
4176 * of which has much of concept of 'uids'. */
4177 Uid_t uid = PerlProc_getuid();
4178 Uid_t euid = PerlProc_geteuid();
4179 Gid_t gid = PerlProc_getgid();
4180 Gid_t egid = PerlProc_getegid();
4187 if (uid && (euid != uid || egid != gid))
4189 #endif /* !PERL_IMPLICIT_SYS */
4190 /* This is a really primitive check; environment gets ignored only
4191 * if -T are the first chars together; otherwise one gets
4192 * "Too late" message. */
4193 if ( argc > 1 && argv[1][0] == '-'
4194 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4199 /* Passing the flag as a single char rather than a string is a slight space
4200 optimisation. The only message that isn't /^-.$/ is
4201 "program input from stdin", which is substituted in place of '\0', which
4202 could never be a command line flag. */
4204 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4206 char string[3] = "-x";
4207 const char *message = "program input from stdin";
4209 PERL_UNUSED_CONTEXT;
4215 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4216 if (PerlProc_getuid() != PerlProc_geteuid())
4217 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4218 if (PerlProc_getgid() != PerlProc_getegid())
4219 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4220 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4222 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4226 Perl_init_dbargs(pTHX)
4228 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4233 /* Someone has already created it.
4234 It might have entries, and if we just turn off AvREAL(), they will
4235 "leak" until global destruction. */
4237 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4238 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4240 AvREIFY_only(PL_dbargs);
4244 Perl_init_debugger(pTHX)
4246 HV * const ostash = PL_curstash;
4249 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4251 Perl_init_dbargs(aTHX);
4252 PL_DBgv = MUTABLE_GV(
4253 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4255 PL_DBline = MUTABLE_GV(
4256 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4258 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4259 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4261 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4262 if (!SvIOK(PL_DBsingle))
4263 sv_setiv(PL_DBsingle, 0);
4264 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4265 mg->mg_private = DBVARMG_SINGLE;
4266 SvSETMAGIC(PL_DBsingle);
4268 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4269 if (!SvIOK(PL_DBtrace))
4270 sv_setiv(PL_DBtrace, 0);
4271 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4272 mg->mg_private = DBVARMG_TRACE;
4273 SvSETMAGIC(PL_DBtrace);
4275 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4276 if (!SvIOK(PL_DBsignal))
4277 sv_setiv(PL_DBsignal, 0);
4278 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4279 mg->mg_private = DBVARMG_SIGNAL;
4280 SvSETMAGIC(PL_DBsignal);
4282 SvREFCNT_dec(PL_curstash);
4283 PL_curstash = ostash;
4286 #ifndef STRESS_REALLOC
4287 #define REASONABLE(size) (size)
4288 #define REASONABLE_but_at_least(size,min) (size)
4290 #define REASONABLE(size) (1) /* unreasonable */
4291 #define REASONABLE_but_at_least(size,min) (min)
4295 Perl_init_stacks(pTHX)
4299 /* start with 128-item stack and 8K cxstack */
4300 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4301 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4302 PL_curstackinfo->si_type = PERLSI_MAIN;
4303 #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
4304 PL_curstackinfo->si_stack_hwm = 0;
4306 PL_curstack = PL_curstackinfo->si_stack;
4307 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4309 PL_stack_base = AvARRAY(PL_curstack);
4310 PL_stack_sp = PL_stack_base;
4311 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4313 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4316 PL_tmps_max = REASONABLE(128);
4318 Newx(PL_markstack,REASONABLE(32),I32);
4319 PL_markstack_ptr = PL_markstack;
4320 PL_markstack_max = PL_markstack + REASONABLE(32);
4324 Newx(PL_scopestack,REASONABLE(32),I32);
4326 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4328 PL_scopestack_ix = 0;
4329 PL_scopestack_max = REASONABLE(32);
4331 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4332 Newx(PL_savestack, size, ANY);
4333 PL_savestack_ix = 0;
4334 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4335 PL_savestack_max = size - SS_MAXPUSH;
4343 while (PL_curstackinfo->si_next)
4344 PL_curstackinfo = PL_curstackinfo->si_next;
4345 while (PL_curstackinfo) {
4346 PERL_SI *p = PL_curstackinfo->si_prev;
4347 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4348 Safefree(PL_curstackinfo->si_cxstack);
4349 Safefree(PL_curstackinfo);
4350 PL_curstackinfo = p;
4352 Safefree(PL_tmps_stack);
4353 Safefree(PL_markstack);
4354 Safefree(PL_scopestack);
4356 Safefree(PL_scopestack_name);
4358 Safefree(PL_savestack);
4362 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4364 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4365 AV *const isa = GvAVn(gv);
4368 PERL_ARGS_ASSERT_POPULATE_ISA;
4370 if(AvFILLp(isa) != -1)
4373 /* NOTE: No support for tied ISA */
4375 va_start(args, len);
4377 const char *const parent = va_arg(args, const char*);
4382 parent_len = va_arg(args, size_t);
4384 /* Arguments are supplied with a trailing :: */
4385 assert(parent_len > 2);
4386 assert(parent[parent_len - 1] == ':');
4387 assert(parent[parent_len - 2] == ':');
4388 av_push(isa, newSVpvn(parent, parent_len - 2));
4389 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4396 S_init_predump_symbols(pTHX)
4401 sv_setpvs(get_sv("\"", GV_ADD), " ");
4402 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4405 /* Historically, PVIOs were blessed into IO::Handle, unless
4406 FileHandle was loaded, in which case they were blessed into
4407 that. Action at a distance.
4408 However, if we simply bless into IO::Handle, we break code
4409 that assumes that PVIOs will have (among others) a seek
4410 method. IO::File inherits from IO::Handle and IO::Seekable,
4411 and provides the needed methods. But if we simply bless into
4412 it, then we break code that assumed that by loading
4413 IO::Handle, *it* would work.
4414 So a compromise is to set up the correct @IO::File::ISA,
4415 so that code that does C<use IO::Handle>; will still work.
4418 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4419 STR_WITH_LEN("IO::Handle::"),
4420 STR_WITH_LEN("IO::Seekable::"),
4421 STR_WITH_LEN("Exporter::"),
4424 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4425 GvMULTI_on(PL_stdingv);
4426 io = GvIOp(PL_stdingv);
4427 IoTYPE(io) = IoTYPE_RDONLY;
4428 IoIFP(io) = PerlIO_stdin();
4429 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4431 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4433 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4436 IoTYPE(io) = IoTYPE_WRONLY;
4437 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4439 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4441 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4443 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4444 GvMULTI_on(PL_stderrgv);
4445 io = GvIOp(PL_stderrgv);
4446 IoTYPE(io) = IoTYPE_WRONLY;
4447 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4448 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4450 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4452 PL_statname = newSVpvs(""); /* last filename we did stat on */
4456 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4458 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4460 argc--,argv++; /* skip name of script */
4461 if (PL_doswitches) {
4462 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4466 if (argv[0][1] == '-' && !argv[0][2]) {
4470 if ((s = strchr(argv[0], '='))) {
4471 const char *const start_name = argv[0] + 1;
4472 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4473 TRUE, SVt_PV)), s + 1);
4476 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4479 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4480 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4481 GvMULTI_on(PL_argvgv);
4482 av_clear(GvAVn(PL_argvgv));
4483 for (; argc > 0; argc--,argv++) {
4484 SV * const sv = newSVpv(argv[0],0);
4485 av_push(GvAV(PL_argvgv),sv);
4486 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4487 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4490 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4491 (void)sv_utf8_decode(sv);
4495 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4496 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4497 "-i used with no filenames on the command line, "
4498 "reading from STDIN");
4502 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4509 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4511 PL_toptarget = newSV_type(SVt_PVIV);
4512 SvPVCLEAR(PL_toptarget);
4513 PL_bodytarget = newSV_type(SVt_PVIV);
4514 SvPVCLEAR(PL_bodytarget);
4515 PL_formtarget = PL_bodytarget;
4519 init_argv_symbols(argc,argv);
4521 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4522 sv_setpv(GvSV(tmpgv),PL_origfilename);
4524 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4526 bool env_is_not_environ;
4527 SvREFCNT_inc_simple_void_NN(PL_envgv);
4528 GvMULTI_on(PL_envgv);
4529 hv = GvHVn(PL_envgv);
4530 hv_magic(hv, NULL, PERL_MAGIC_env);
4532 #ifdef USE_ENVIRON_ARRAY
4533 /* Note that if the supplied env parameter is actually a copy
4534 of the global environ then it may now point to free'd memory
4535 if the environment has been modified since. To avoid this
4536 problem we treat env==NULL as meaning 'use the default'
4540 env_is_not_environ = env != environ;
4541 if (env_is_not_environ
4542 # ifdef USE_ITHREADS
4543 && PL_curinterp == aTHX
4555 for (; *env; env++) {
4558 if (!(s = strchr(old_var,'=')) || s == old_var)
4562 #if defined(MSDOS) && !defined(DJGPP)
4564 (void)strupr(old_var);
4567 if (hv_exists(hv, old_var, nlen)) {
4568 const char *name = savepvn(old_var, nlen);
4570 /* make sure we use the same value as getenv(), otherwise code that
4571 uses getenv() (like setlocale()) might see a different value to %ENV
4573 sv = newSVpv(PerlEnv_getenv(name), 0);
4575 /* keep a count of the dups of this name so we can de-dup environ later */
4576 if (hv_exists(dups, name, nlen))
4577 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4579 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4584 sv = newSVpv(s+1, 0);
4586 (void)hv_store(hv, old_var, nlen, sv, 0);
4587 if (env_is_not_environ)
4591 /* environ has some duplicate definitions, remove them */
4594 while ((entry = hv_iternext_flags(dups, 0))) {
4596 const char *name = HePV(entry, nlen);
4597 IV count = SvIV(HeVAL(entry));
4599 SV **valp = hv_fetch(hv, name, nlen, 0);
4603 /* try to remove any duplicate names, depending on the
4604 * implementation used in my_setenv() the iteration might
4605 * not be necessary, but let's be safe.
4607 for (i = 0; i < count; ++i)
4610 /* and set it back to the value we set $ENV{name} to */
4611 my_setenv(name, SvPV_nolen(*valp));
4614 SvREFCNT_dec_NN(dups);
4616 #endif /* USE_ENVIRON_ARRAY */
4617 #endif /* !PERL_MICRO */
4621 /* touch @F array to prevent spurious warnings 20020415 MJD */
4623 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4628 S_init_perllib(pTHX)
4631 const char *perl5lib = NULL;
4634 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4638 if (!TAINTING_get) {
4640 perl5lib = PerlEnv_getenv("PERL5LIB");
4642 * It isn't possible to delete an environment variable with
4643 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4644 * case we treat PERL5LIB as undefined if it has a zero-length value.
4646 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4647 if (perl5lib && *perl5lib != '\0')
4651 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4653 s = PerlEnv_getenv("PERLLIB");
4655 incpush_use_sep(s, 0, 0);
4658 /* Treat PERL5?LIB as a possible search list logical name -- the
4659 * "natural" VMS idiom for a Unix path string. We allow each
4660 * element to be a set of |-separated directories for compatibility.
4664 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4666 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4667 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4669 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4670 incpush_use_sep(buf, 0, 0);
4675 #ifndef PERL_IS_MINIPERL
4676 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4677 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4679 #include "perl_inc_macro.h"
4680 /* Use the ~-expanded versions of APPLLIB (undocumented),
4681 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4684 INCPUSH_SITEARCH_EXP
4686 INCPUSH_PERL_VENDORARCH_EXP
4687 INCPUSH_PERL_VENDORLIB_EXP
4690 INCPUSH_PERL_OTHERLIBDIRS
4692 INCPUSH_APPLLIB_OLD_EXP
4693 INCPUSH_SITELIB_STEM
4694 INCPUSH_PERL_VENDORLIB_STEM
4695 INCPUSH_PERL_OTHERLIBDIRS_ARCHONLY
4697 #endif /* !PERL_IS_MINIPERL */
4699 if (!TAINTING_get) {
4700 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4701 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4702 if (unsafe && strEQ(unsafe, "1"))
4704 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4708 #if defined(DOSISH) || defined(__SYMBIAN32__)
4709 # define PERLLIB_SEP ';'
4710 #elif defined(__VMS)
4711 # define PERLLIB_SEP PL_perllib_sep
4713 # define PERLLIB_SEP ':'
4715 #ifndef PERLLIB_MANGLE
4716 # define PERLLIB_MANGLE(s,n) (s)
4719 #ifndef PERL_IS_MINIPERL
4720 /* Push a directory onto @INC if it exists.
4721 Generate a new SV if we do this, to save needing to copy the SV we push
4724 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4728 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4730 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4731 S_ISDIR(tmpstatbuf.st_mode)) {
4733 dir = newSVsv(stem);
4735 /* Truncate dir back to stem. */
4736 SvCUR_set(dir, SvCUR(stem));
4743 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4745 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4748 PERL_ARGS_ASSERT_MAYBERELOCATE;
4751 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4752 defined to so something (in os2/os2.c), but the code has been
4753 this way, ignoring any possible changed of length, since
4754 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4756 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4762 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4764 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4765 sv_usepvn(libdir,unix,len);
4768 PerlIO_printf(Perl_error_log,
4769 "Failed to unixify @INC element \"%s\"\n",
4770 SvPV_nolen_const(libdir));
4774 /* Do the if() outside the #ifdef to avoid warnings about an unused
4777 #ifdef PERL_RELOCATABLE_INC
4779 * Relocatable include entries are marked with a leading .../
4782 * 0: Remove that leading ".../"
4783 * 1: Remove trailing executable name (anything after the last '/')
4784 * from the perl path to give a perl prefix
4786 * While the @INC element starts "../" and the prefix ends with a real
4787 * directory (ie not . or ..) chop that real directory off the prefix
4788 * and the leading "../" from the @INC element. ie a logical "../"
4790 * Finally concatenate the prefix and the remainder of the @INC element
4791 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4792 * generates /usr/local/lib/perl5
4794 const char *libpath = SvPVX(libdir);
4795 STRLEN libpath_len = SvCUR(libdir);
4796 if (memBEGINs(libpath, libpath_len, ".../")) {
4798 SV * const caret_X = get_sv("\030", 0);
4799 /* Going to use the SV just as a scratch buffer holding a C
4805 /* $^X is *the* source of taint if tainting is on, hence
4806 SvPOK() won't be true. */
4808 assert(SvPOKp(caret_X));
4809 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4811 /* Firstly take off the leading .../
4812 If all else fail we'll do the paths relative to the current
4814 sv_chop(libdir, libpath + 4);
4815 /* Don't use SvPV as we're intentionally bypassing taining,
4816 mortal copies that the mg_get of tainting creates, and
4817 corruption that seems to come via the save stack.
4818 I guess that the save stack isn't correctly set up yet. */
4819 libpath = SvPVX(libdir);
4820 libpath_len = SvCUR(libdir);
4822 prefix = SvPVX(prefix_sv);
4823 lastslash = (char *) my_memrchr(prefix, '/',
4824 SvEND(prefix_sv) - prefix);
4826 /* First time in with the *lastslash = '\0' we just wipe off
4827 the trailing /perl from (say) /usr/foo/bin/perl
4831 while ((*lastslash = '\0'), /* Do that, come what may. */
4832 ( memBEGINs(libpath, libpath_len, "../")
4834 (char *) my_memrchr(prefix, '/',
4835 SvEND(prefix_sv) - prefix))))
4837 if (lastslash[1] == '\0'
4838 || (lastslash[1] == '.'
4839 && (lastslash[2] == '/' /* ends "/." */
4840 || (lastslash[2] == '/'
4841 && lastslash[3] == '/' /* or "/.." */
4843 /* Prefix ends "/" or "/." or "/..", any of which
4844 are fishy, so don't do any more logical cleanup.
4848 /* Remove leading "../" from path */
4851 /* Next iteration round the loop removes the last
4852 directory name from prefix by writing a '\0' in
4853 the while clause. */
4855 /* prefix has been terminated with a '\0' to the correct
4856 length. libpath points somewhere into the libdir SV.
4857 We need to join the 2 with '/' and drop the result into
4859 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4860 SvREFCNT_dec(libdir);
4861 /* And this is the new libdir. */
4864 (PerlProc_getuid() != PerlProc_geteuid() ||
4865 PerlProc_getgid() != PerlProc_getegid())) {
4866 /* Need to taint relocated paths if running set ID */
4867 SvTAINTED_on(libdir);
4870 SvREFCNT_dec(prefix_sv);
4878 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4880 #ifndef PERL_IS_MINIPERL
4881 const U8 using_sub_dirs
4882 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4883 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4884 const U8 add_versioned_sub_dirs
4885 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4886 const U8 add_archonly_sub_dirs
4887 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4888 #ifdef PERL_INC_VERSION_LIST
4889 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4892 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4893 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4894 AV *const inc = GvAVn(PL_incgv);
4896 PERL_ARGS_ASSERT_INCPUSH;
4899 /* Could remove this vestigial extra block, if we don't mind a lot of
4900 re-indenting diff noise. */
4902 SV *const libdir = mayberelocate(dir, len, flags);
4903 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4904 arranged to unshift #! line -I onto the front of @INC. However,
4905 -I can add version and architecture specific libraries, and they
4906 need to go first. The old code assumed that it was always
4907 pushing. Hence to make it work, need to push the architecture
4908 (etc) libraries onto a temporary array, then "unshift" that onto
4909 the front of @INC. */
4910 #ifndef PERL_IS_MINIPERL
4911 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4914 * BEFORE pushing libdir onto @INC we may first push version- and
4915 * archname-specific sub-directories.
4917 if (using_sub_dirs) {
4918 SV *subdir = newSVsv(libdir);
4919 #ifdef PERL_INC_VERSION_LIST
4920 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4921 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4922 const char * const *incver;
4925 if (add_versioned_sub_dirs) {
4926 /* .../version/archname if -d .../version/archname */
4927 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4928 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4930 /* .../version if -d .../version */
4931 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4932 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4935 #ifdef PERL_INC_VERSION_LIST
4937 for (incver = incverlist; *incver; incver++) {
4938 /* .../xxx if -d .../xxx */
4939 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4940 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4945 if (add_archonly_sub_dirs) {
4946 /* .../archname if -d .../archname */
4947 sv_catpvs(subdir, "/" ARCHNAME);
4948 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4952 assert (SvREFCNT(subdir) == 1);
4953 SvREFCNT_dec(subdir);
4955 #endif /* !PERL_IS_MINIPERL */
4956 /* finally add this lib directory at the end of @INC */
4958 #ifdef PERL_IS_MINIPERL
4959 const Size_t extra = 0;
4961 Size_t extra = av_tindex(av) + 1;
4963 av_unshift(inc, extra + push_basedir);
4965 av_store(inc, extra, libdir);
4966 #ifndef PERL_IS_MINIPERL
4968 /* av owns a reference, av_store() expects to be donated a
4969 reference, and av expects to be sane when it's cleared.
4970 If I wanted to be naughty and wrong, I could peek inside the
4971 implementation of av_clear(), realise that it uses
4972 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4973 and so directly steal from it (with a memcpy() to inc, and
4974 then memset() to NULL them out. But people copy code from the
4975 core expecting it to be best practise, so let's use the API.
4976 Although studious readers will note that I'm not checking any
4978 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4983 else if (push_basedir) {
4984 av_push(inc, libdir);
4987 if (!push_basedir) {
4988 assert (SvREFCNT(libdir) == 1);
4989 SvREFCNT_dec(libdir);
4995 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4999 /* This logic has been broken out from S_incpush(). It may be possible to
5002 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
5004 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
5005 * argument to incpush_use_sep. This allows creation of relocatable
5006 * Perl distributions that patch the binary at install time. Those
5007 * distributions will have to provide their own relocation tools; this
5008 * is not a feature otherwise supported by core Perl.
5010 #ifndef PERL_RELOCATABLE_INCPUSH
5017 /* Break at all separators */
5018 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
5020 /* skip any consecutive separators */
5022 /* Uncomment the next line for PATH semantics */
5023 /* But you'll need to write tests */
5024 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
5026 incpush(p, (STRLEN)(s - p), flags);
5031 incpush(p, (STRLEN)(end - p), flags);
5036 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5039 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5045 PERL_ARGS_ASSERT_CALL_LIST;
5047 while (av_tindex(paramList) >= 0) {
5048 cv = MUTABLE_CV(av_shift(paramList));
5050 if (paramList == PL_beginav) {
5051 /* save PL_beginav for compiler */
5052 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5054 else if (paramList == PL_checkav) {
5055 /* save PL_checkav for compiler */
5056 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5058 else if (paramList == PL_unitcheckav) {
5059 /* save PL_unitcheckav for compiler */
5060 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5070 (void)SvPV_const(atsv, len);
5072 PL_curcop = &PL_compiling;
5073 CopLINE_set(PL_curcop, oldline);
5074 if (paramList == PL_beginav)
5075 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5077 Perl_sv_catpvf(aTHX_ atsv,
5078 "%s failed--call queue aborted",
5079 paramList == PL_checkav ? "CHECK"
5080 : paramList == PL_initav ? "INIT"
5081 : paramList == PL_unitcheckav ? "UNITCHECK"
5083 while (PL_scopestack_ix > oldscope)
5086 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5093 /* my_exit() was called */
5094 while (PL_scopestack_ix > oldscope)
5097 SET_CURSTASH(PL_defstash);
5098 PL_curcop = &PL_compiling;
5099 CopLINE_set(PL_curcop, oldline);
5102 NOT_REACHED; /* NOTREACHED */
5105 PL_curcop = &PL_compiling;
5106 CopLINE_set(PL_curcop, oldline);
5109 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5118 Perl_my_exit(pTHX_ U32 status)
5120 if (PL_exit_flags & PERL_EXIT_ABORT) {
5123 if (PL_exit_flags & PERL_EXIT_WARN) {
5124 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5125 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5126 PL_exit_flags &= ~PERL_EXIT_ABORT;
5136 STATUS_EXIT_SET(status);
5143 Perl_my_failure_exit(pTHX)
5146 /* We have been called to fall on our sword. The desired exit code
5147 * should be already set in STATUS_UNIX, but could be shifted over
5148 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5151 * If an error code has not been set, then force the issue.
5153 if (MY_POSIX_EXIT) {
5155 /* According to the die_exit.t tests, if errno is non-zero */
5156 /* It should be used for the error status. */
5158 if (errno == EVMSERR) {
5159 STATUS_NATIVE = vaxc$errno;
5162 /* According to die_exit.t tests, if the child_exit code is */
5163 /* also zero, then we need to exit with a code of 255 */
5164 if ((errno != 0) && (errno < 256))
5165 STATUS_UNIX_EXIT_SET(errno);
5166 else if (STATUS_UNIX < 255) {
5167 STATUS_UNIX_EXIT_SET(255);
5172 /* The exit code could have been set by $? or vmsish which
5173 * means that it may not have fatal set. So convert
5174 * success/warning codes to fatal with out changing
5175 * the POSIX status code. The severity makes VMS native
5176 * status handling work, while UNIX mode programs use the
5177 * the POSIX exit codes.
5179 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5180 STATUS_NATIVE &= STS$M_COND_ID;
5181 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5185 /* Traditionally Perl on VMS always expects a Fatal Error. */
5186 if (vaxc$errno & 1) {
5188 /* So force success status to failure */
5189 if (STATUS_NATIVE & 1)
5194 STATUS_UNIX = EINTR; /* In case something cares */
5199 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5201 /* Encode the severity code */
5202 severity = STATUS_NATIVE & STS$M_SEVERITY;
5203 STATUS_UNIX = (severity ? severity : 1) << 8;
5205 /* Perl expects this to be a fatal error */
5206 if (severity != STS$K_SEVERE)
5216 STATUS_UNIX_SET(eno);
5218 exitstatus = STATUS_UNIX >> 8;
5219 if (exitstatus & 255)
5220 STATUS_UNIX_SET(exitstatus);
5222 STATUS_UNIX_SET(255);
5225 if (PL_exit_flags & PERL_EXIT_ABORT) {
5228 if (PL_exit_flags & PERL_EXIT_WARN) {
5229 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5230 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5231 PL_exit_flags &= ~PERL_EXIT_ABORT;
5237 S_my_exit_jump(pTHX)
5240 SvREFCNT_dec(PL_e_script);
5244 POPSTACK_TO(PL_mainstack);
5245 if (cxstack_ix >= 0) {
5247 cx_popblock(cxstack);
5255 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5257 const char * const p = SvPVX_const(PL_e_script);
5258 const char * const e = SvEND(PL_e_script);
5259 const char *nl = (char *) memchr(p, '\n', e - p);
5261 PERL_UNUSED_ARG(idx);
5262 PERL_UNUSED_ARG(maxlen);
5264 nl = (nl) ? nl+1 : e;
5266 filter_del(read_e_script);
5269 sv_catpvn(buf_sv, p, nl-p);
5270 sv_chop(PL_e_script, nl);
5274 /* removes boilerplate code at the end of each boot_Module xsub */
5276 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5279 call_list(PL_scopestack_ix, PL_unitcheckav);
5284 * ex: set ts=8 sts=4 sw=4 et: