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 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);
97 MUTEX_INIT(&PL_dollarzero_mutex);
98 MUTEX_INIT(&PL_my_ctx_mutex);
101 #if defined(USE_ITHREADS)
104 /* This always happens for non-ithreads */
107 PERL_SET_THX(my_perl);
112 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
115 Perl_sys_init(int* argc, char*** argv)
119 PERL_ARGS_ASSERT_SYS_INIT;
121 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
122 PERL_UNUSED_ARG(argv);
123 PERL_SYS_INIT_BODY(argc, argv);
127 Perl_sys_init3(int* argc, char*** argv, char*** env)
131 PERL_ARGS_ASSERT_SYS_INIT3;
133 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
134 PERL_UNUSED_ARG(argv);
135 PERL_UNUSED_ARG(env);
136 PERL_SYS_INIT3_BODY(argc, argv, env);
143 if (!PL_veto_cleanup) {
144 PERL_SYS_TERM_BODY();
149 #ifdef PERL_IMPLICIT_SYS
151 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
152 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
153 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
154 struct IPerlDir* ipD, struct IPerlSock* ipS,
155 struct IPerlProc* ipP)
157 PerlInterpreter *my_perl;
159 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
161 /* Newx() needs interpreter, so call malloc() instead */
162 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
163 S_init_tls_and_interp(my_perl);
164 Zero(my_perl, 1, PerlInterpreter);
174 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
181 =head1 Embedding Functions
183 =for apidoc perl_alloc
185 Allocates a new Perl interpreter. See L<perlembed>.
193 PerlInterpreter *my_perl;
195 /* Newx() needs interpreter, so call malloc() instead */
196 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
198 S_init_tls_and_interp(my_perl);
199 #ifndef PERL_TRACK_MEMPOOL
200 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
202 Zero(my_perl, 1, PerlInterpreter);
203 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
207 #endif /* PERL_IMPLICIT_SYS */
210 =for apidoc perl_construct
212 Initializes a new Perl interpreter. See L<perlembed>.
218 S_fixup_platform_bugs(void)
220 #if defined(__GLIBC__) && IVSIZE == 8 \
221 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
225 /* Cannot do this check with inlined IV constants since
226 * that seems to work correctly even with the buggy glibc. */
229 /* Yikes, we have the bug.
230 * Patch in the workaround version. */
231 PL_ppaddr[OP_I_MODULO] = &Perl_pp_i_modulo_glibc_bugfix;
238 perl_construct(pTHXx)
242 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
246 PL_perl_destruct_level = 1;
248 PERL_UNUSED_ARG(my_perl);
249 if (PL_perl_destruct_level > 0)
252 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
254 #ifdef PERL_TRACE_OPS
255 Zero(PL_op_exec_cnt, OP_max+2, UV);
260 SvREADONLY_on(&PL_sv_placeholder);
261 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
263 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
264 #ifdef PERL_USES_PL_PIDSTATUS
265 PL_pidstatus = newHV();
268 PL_rs = newSVpvs("\n");
272 /* The PERL_INTERNAL_RAND_SEED set-up must be after init_stacks because it calls
273 * things that may put SVs on the stack.
276 #ifdef NO_PERL_INTERNAL_RAND_SEED
277 Perl_drand48_init_r(&PL_internal_random_state, seed());
282 if (PerlProc_getuid() != PerlProc_geteuid() ||
283 PerlProc_getgid() != PerlProc_getegid() ||
284 !(env_pv = PerlEnv_getenv("PERL_INTERNAL_RAND_SEED")) ||
285 grok_number(env_pv, strlen(env_pv), &seed) != IS_NUMBER_IN_UV) {
288 Perl_drand48_init_r(&PL_internal_random_state, (U32)seed);
294 S_fixup_platform_bugs();
301 #if defined(LOCAL_PATCH_COUNT)
302 PL_localpatches = local_patches; /* For possible -v */
305 #if defined(LIBM_LIB_VERSION)
307 * Some BSDs and Cygwin default to POSIX math instead of IEEE.
308 * This switches them over to IEEE.
310 _LIB_VERSION = _IEEE_;
313 #ifdef HAVE_INTERP_INTERN
317 PerlIO_init(aTHX); /* Hook to IO system */
319 PL_fdpid = newAV(); /* for remembering popen pids by fd */
320 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
321 PL_errors = newSVpvs("");
322 SvPVCLEAR(PERL_DEBUG_PAD(0)); /* For regex debugging. */
323 SvPVCLEAR(PERL_DEBUG_PAD(1)); /* ext/re needs these */
324 SvPVCLEAR(PERL_DEBUG_PAD(2)); /* even without DEBUGGING. */
326 /* First entry is a list of empty elements. It needs to be initialised
327 else all hell breaks loose in S_find_uninit_var(). */
328 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
329 PL_regex_pad = AvARRAY(PL_regex_padav);
330 Newxz(PL_stashpad, PL_stashpadmax, HV *);
332 #ifdef USE_REENTRANT_API
333 Perl_reentrant_init(aTHX);
335 if (PL_hash_seed_set == FALSE) {
336 /* Initialize the hash seed and state at startup. This must be
337 * done very early, before ANY hashes are constructed, and once
338 * setup is fixed for the lifetime of the process.
340 * If you decide to disable the seeding process you should choose
341 * a suitable seed yourself and define PERL_HASH_SEED to a well chosen
342 * string. See hv_func.h for details.
344 #if defined(USE_HASH_SEED)
345 /* get the hash seed from the environment or from an RNG */
346 Perl_get_hash_seed(aTHX_ PL_hash_seed);
348 /* they want a hard coded seed, check that it is long enough */
349 assert( strlen(PERL_HASH_SEED) >= PERL_HASH_SEED_BYTES );
352 /* now we use the chosen seed to initialize the state -
353 * in some configurations this may be a relatively speaking
354 * expensive operation, but we only have to do it once at startup */
355 PERL_HASH_SEED_STATE(PERL_HASH_SEED,PL_hash_state);
357 #ifdef PERL_USE_SINGLE_CHAR_HASH_CACHE
358 /* we can build a special cache for 0/1 byte keys, if people choose
359 * I suspect most of the time it is not worth it */
363 for (i=0;i<256;i++) {
365 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[i],str,1);
367 PERL_HASH_WITH_STATE(PL_hash_state,PL_hash_chars[256],str,0);
370 /* at this point we have initialezed the hash function, and we can start
371 * constructing hashes */
372 PL_hash_seed_set= TRUE;
374 /* Note that strtab is a rather special HV. Assumptions are made
375 about not iterating on it, and not adding tie magic to it.
376 It is properly deallocated in perl_destruct() */
379 /* SHAREKEYS tells us that the hash has its keys shared with PL_strtab,
380 * which is not the case with PL_strtab itself */
381 HvSHAREKEYS_off(PL_strtab); /* mandatory */
382 hv_ksplit(PL_strtab, 1 << 11);
384 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
387 # ifdef USE_ENVIRON_ARRAY
388 PL_origenviron = environ;
392 /* Use sysconf(_SC_CLK_TCK) if available, if not
393 * available or if the sysconf() fails, use the HZ.
394 * The HZ if not originally defined has been by now
395 * been defined as CLK_TCK, if available. */
396 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
397 PL_clocktick = sysconf(_SC_CLK_TCK);
398 if (PL_clocktick <= 0)
402 PL_stashcache = newHV();
404 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
407 if (!PL_mmap_page_size) {
408 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
410 SETERRNO(0, SS_NORMAL);
412 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
414 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
416 if ((long) PL_mmap_page_size < 0) {
418 SV * const error = ERRSV;
419 SvUPGRADE(error, SVt_PV);
420 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
423 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
426 #elif defined(HAS_GETPAGESIZE)
427 PL_mmap_page_size = getpagesize();
428 #elif defined(I_SYS_PARAM) && defined(PAGESIZE)
429 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
431 if (PL_mmap_page_size <= 0)
432 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
433 (IV) PL_mmap_page_size);
435 #endif /* HAS_MMAP */
437 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
438 PL_timesbase.tms_utime = 0;
439 PL_timesbase.tms_stime = 0;
440 PL_timesbase.tms_cutime = 0;
441 PL_timesbase.tms_cstime = 0;
444 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
446 PL_registered_mros = newHV();
447 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
448 HvMAX(PL_registered_mros) = 0;
450 PL_XPosix_ptrs[_CC_ASCII] = _new_invlist_C_array(ASCII_invlist);
451 PL_XPosix_ptrs[_CC_ALPHANUMERIC] = _new_invlist_C_array(XPosixAlnum_invlist);
452 PL_XPosix_ptrs[_CC_ALPHA] = _new_invlist_C_array(XPosixAlpha_invlist);
453 PL_XPosix_ptrs[_CC_BLANK] = _new_invlist_C_array(XPosixBlank_invlist);
454 PL_XPosix_ptrs[_CC_CASED] = _new_invlist_C_array(Cased_invlist);
455 PL_XPosix_ptrs[_CC_CNTRL] = _new_invlist_C_array(XPosixCntrl_invlist);
456 PL_XPosix_ptrs[_CC_DIGIT] = _new_invlist_C_array(XPosixDigit_invlist);
457 PL_XPosix_ptrs[_CC_GRAPH] = _new_invlist_C_array(XPosixGraph_invlist);
458 PL_XPosix_ptrs[_CC_LOWER] = _new_invlist_C_array(XPosixLower_invlist);
459 PL_XPosix_ptrs[_CC_PRINT] = _new_invlist_C_array(XPosixPrint_invlist);
460 PL_XPosix_ptrs[_CC_PUNCT] = _new_invlist_C_array(XPosixPunct_invlist);
461 PL_XPosix_ptrs[_CC_SPACE] = _new_invlist_C_array(XPerlSpace_invlist);
462 PL_XPosix_ptrs[_CC_UPPER] = _new_invlist_C_array(XPosixUpper_invlist);
463 PL_XPosix_ptrs[_CC_VERTSPACE] = _new_invlist_C_array(VertSpace_invlist);
464 PL_XPosix_ptrs[_CC_WORDCHAR] = _new_invlist_C_array(XPosixWord_invlist);
465 PL_XPosix_ptrs[_CC_XDIGIT] = _new_invlist_C_array(XPosixXDigit_invlist);
466 PL_GCB_invlist = _new_invlist_C_array(_Perl_GCB_invlist);
467 PL_SB_invlist = _new_invlist_C_array(_Perl_SB_invlist);
468 PL_WB_invlist = _new_invlist_C_array(_Perl_WB_invlist);
469 PL_LB_invlist = _new_invlist_C_array(_Perl_LB_invlist);
470 PL_Assigned_invlist = _new_invlist_C_array(Assigned_invlist);
471 #ifdef HAS_POSIX_2008_LOCALE
472 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
479 =for apidoc nothreadhook
481 Stub that provides thread hook for perl_destruct when there are
488 Perl_nothreadhook(pTHX)
494 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
496 Perl_dump_sv_child(pTHX_ SV *sv)
499 const int sock = PL_dumper_fd;
500 const int debug_fd = PerlIO_fileno(Perl_debug_log);
501 union control_un control;
504 struct cmsghdr *cmptr;
506 unsigned char buffer[256];
508 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
510 if(sock == -1 || debug_fd == -1)
513 PerlIO_flush(Perl_debug_log);
515 /* All these shenanigans are to pass a file descriptor over to our child for
516 it to dump out to. We can't let it hold open the file descriptor when it
517 forks, as the file descriptor it will dump to can turn out to be one end
518 of pipe that some other process will wait on for EOF. (So as it would
519 be open, the wait would be forever.) */
521 msg.msg_control = control.control;
522 msg.msg_controllen = sizeof(control.control);
523 /* We're a connected socket so we don't need a destination */
529 cmptr = CMSG_FIRSTHDR(&msg);
530 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
531 cmptr->cmsg_level = SOL_SOCKET;
532 cmptr->cmsg_type = SCM_RIGHTS;
533 *((int *)CMSG_DATA(cmptr)) = 1;
535 vec[0].iov_base = (void*)&sv;
536 vec[0].iov_len = sizeof(sv);
537 got = sendmsg(sock, &msg, 0);
540 perror("Debug leaking scalars parent sendmsg failed");
543 if(got < sizeof(sv)) {
544 perror("Debug leaking scalars parent short sendmsg");
548 /* Return protocol is
550 unsigned char: length of location string (0 for empty)
551 unsigned char*: string (not terminated)
553 vec[0].iov_base = (void*)&returned_errno;
554 vec[0].iov_len = sizeof(returned_errno);
555 vec[1].iov_base = buffer;
558 got = readv(sock, vec, 2);
561 perror("Debug leaking scalars parent read failed");
562 PerlIO_flush(PerlIO_stderr());
565 if(got < sizeof(returned_errno) + 1) {
566 perror("Debug leaking scalars parent short read");
567 PerlIO_flush(PerlIO_stderr());
572 got = read(sock, buffer + 1, *buffer);
574 perror("Debug leaking scalars parent read 2 failed");
575 PerlIO_flush(PerlIO_stderr());
580 perror("Debug leaking scalars parent short read 2");
581 PerlIO_flush(PerlIO_stderr());
586 if (returned_errno || *buffer) {
587 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
588 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
589 returned_errno, Strerror(returned_errno));
595 =for apidoc perl_destruct
597 Shuts down a Perl interpreter. See L<perlembed>.
606 volatile signed char destruct_level; /* see possible values in intrpvar.h */
608 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
613 PERL_ARGS_ASSERT_PERL_DESTRUCT;
615 PERL_UNUSED_ARG(my_perl);
618 assert(PL_scopestack_ix == 1);
620 /* wait for all pseudo-forked children to finish */
621 PERL_WAIT_FOR_CHILDREN;
623 destruct_level = PL_perl_destruct_level;
624 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
626 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
629 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
633 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
639 if (destruct_level < i) destruct_level = i;
641 #ifdef PERL_TRACK_MEMPOOL
642 /* RT #114496, for perl_free */
643 PL_perl_destruct_level = i;
649 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
655 if (PL_endav && !PL_minus_c) {
656 PERL_SET_PHASE(PERL_PHASE_END);
657 call_list(PL_scopestack_ix, PL_endav);
663 assert(PL_scopestack_ix == 0);
665 /* Need to flush since END blocks can produce output */
666 /* flush stdout separately, since we can identify it */
669 PerlIO *stdo = PerlIO_stdout();
670 if (*stdo && PerlIO_flush(stdo)) {
671 PerlIO_restore_errno(stdo);
673 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s",
682 #ifdef PERL_TRACE_OPS
683 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
685 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
688 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
692 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
693 for (i = 0; i <= OP_max; ++i) {
694 if (PL_op_exec_cnt[i])
695 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
697 /* Utility slot for easily doing little tracing experiments in the runloop: */
698 if (PL_op_exec_cnt[OP_max+1] != 0)
699 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
700 PerlIO_printf(Perl_debug_log, "\n");
705 if (PL_threadhook(aTHX)) {
706 /* Threads hook has vetoed further cleanup */
707 PL_veto_cleanup = TRUE;
711 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
712 if (destruct_level != 0) {
713 /* Fork here to create a child. Our child's job is to preserve the
714 state of scalars prior to destruction, so that we can instruct it
715 to dump any scalars that we later find have leaked.
716 There's no subtlety in this code - it assumes POSIX, and it doesn't
720 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
721 perror("Debug leaking scalars socketpair failed");
727 perror("Debug leaking scalars fork failed");
731 /* We are the child */
732 const int sock = fd[1];
733 const int debug_fd = PerlIO_fileno(Perl_debug_log);
736 /* Our success message is an integer 0, and a char 0 */
737 static const char success[sizeof(int) + 1] = {0};
741 /* We need to close all other file descriptors otherwise we end up
742 with interesting hangs, where the parent closes its end of a
743 pipe, and sits waiting for (another) child to terminate. Only
744 that child never terminates, because it never gets EOF, because
745 we also have the far end of the pipe open. We even need to
746 close the debugging fd, because sometimes it happens to be one
747 end of a pipe, and a process is waiting on the other end for
748 EOF. Normally it would be closed at some point earlier in
749 destruction, but if we happen to cause the pipe to remain open,
750 EOF never occurs, and we get an infinite hang. Hence all the
751 games to pass in a file descriptor if it's actually needed. */
753 f = sysconf(_SC_OPEN_MAX);
755 where = "sysconf failed";
766 union control_un control;
769 struct cmsghdr *cmptr;
773 msg.msg_control = control.control;
774 msg.msg_controllen = sizeof(control.control);
775 /* We're a connected socket so we don't need a source */
779 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
781 vec[0].iov_base = (void*)⌖
782 vec[0].iov_len = sizeof(target);
784 got = recvmsg(sock, &msg, 0);
789 where = "recv failed";
792 if(got < sizeof(target)) {
793 where = "short recv";
797 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
801 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
802 where = "wrong cmsg_len";
805 if(cmptr->cmsg_level != SOL_SOCKET) {
806 where = "wrong cmsg_level";
809 if(cmptr->cmsg_type != SCM_RIGHTS) {
810 where = "wrong cmsg_type";
814 got_fd = *(int*)CMSG_DATA(cmptr);
815 /* For our last little bit of trickery, put the file descriptor
816 back into Perl_debug_log, as if we never actually closed it
818 if(got_fd != debug_fd) {
819 if (dup2(got_fd, debug_fd) == -1) {
826 PerlIO_flush(Perl_debug_log);
828 got = write(sock, &success, sizeof(success));
831 where = "write failed";
834 if(got < sizeof(success)) {
835 where = "short write";
842 int send_errno = errno;
843 unsigned char length = (unsigned char) strlen(where);
844 struct iovec failure[3] = {
845 {(void*)&send_errno, sizeof(send_errno)},
847 {(void*)where, length}
849 int got = writev(sock, failure, 3);
850 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
851 in the parent if we try to read from the socketpair after the
852 child has exited, even if there was data to read.
853 So sleep a bit to give the parent a fighting chance of
856 _exit((got == -1) ? errno : 0);
860 PL_dumper_fd = fd[0];
865 /* We must account for everything. */
867 /* Destroy the main CV and syntax tree */
868 /* Set PL_curcop now, because destroying ops can cause new SVs
869 to be generated in Perl_pad_swipe, and when running with
870 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
871 op from which the filename structure member is copied. */
872 PL_curcop = &PL_compiling;
874 /* ensure comppad/curpad to refer to main's pad */
875 if (CvPADLIST(PL_main_cv)) {
876 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
877 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
879 op_free(PL_main_root);
882 PL_main_start = NULL;
883 /* note that PL_main_cv isn't usually actually freed at this point,
884 * due to the CvOUTSIDE refs from subs compiled within it. It will
885 * get freed once all the subs are freed in sv_clean_all(), for
886 * destruct_level > 0 */
887 SvREFCNT_dec(PL_main_cv);
889 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
891 /* Tell PerlIO we are about to tear things apart in case
892 we have layers which are using resources that should
896 PerlIO_destruct(aTHX);
899 * Try to destruct global references. We do this first so that the
900 * destructors and destructees still exist. Some sv's might remain.
901 * Non-referenced objects are on their own.
905 /* unhook hooks which will soon be, or use, destroyed data */
906 SvREFCNT_dec(PL_warnhook);
908 SvREFCNT_dec(PL_diehook);
911 /* call exit list functions */
912 while (PL_exitlistlen-- > 0)
913 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
915 Safefree(PL_exitlist);
920 SvREFCNT_dec(PL_registered_mros);
922 /* jettison our possibly duplicated environment */
923 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
924 * so we certainly shouldn't free it here
927 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
928 if (environ != PL_origenviron && !PL_use_safe_putenv
930 /* only main thread can free environ[0] contents */
931 && PL_curinterp == aTHX
937 for (i = 0; environ[i]; i++)
938 safesysfree(environ[i]);
940 /* Must use safesysfree() when working with environ. */
941 safesysfree(environ);
943 environ = PL_origenviron;
946 #endif /* !PERL_MICRO */
948 if (destruct_level == 0) {
950 DEBUG_P(debprofdump());
952 #if defined(PERLIO_LAYERS)
953 /* No more IO - including error messages ! */
954 PerlIO_cleanup(aTHX);
957 CopFILE_free(&PL_compiling);
959 /* The exit() function will do everything that needs doing. */
963 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
966 /* the syntax tree is shared between clones
967 * so op_free(PL_main_root) only ReREFCNT_dec's
968 * REGEXPs in the parent interpreter
969 * we need to manually ReREFCNT_dec for the clones
972 I32 i = AvFILLp(PL_regex_padav);
973 SV **ary = AvARRAY(PL_regex_padav);
976 SvREFCNT_dec(ary[i]);
977 ary[i] = &PL_sv_undef;
983 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
984 PL_stashcache = NULL;
986 /* loosen bonds of global variables */
988 /* XXX can PL_parser still be non-null here? */
989 if(PL_parser && PL_parser->rsfp) {
990 (void)PerlIO_close(PL_parser->rsfp);
991 PL_parser->rsfp = NULL;
995 Safefree(PL_splitstr);
1005 PL_doswitches = FALSE;
1006 PL_dowarn = G_WARN_OFF;
1007 #ifdef PERL_SAWAMPERSAND
1008 PL_sawampersand = 0; /* must save all match strings */
1012 Safefree(PL_inplace);
1014 SvREFCNT_dec(PL_patchlevel);
1017 SvREFCNT_dec(PL_e_script);
1023 /* magical thingies */
1025 SvREFCNT_dec(PL_ofsgv); /* *, */
1028 SvREFCNT_dec(PL_ors_sv); /* $\ */
1031 SvREFCNT_dec(PL_rs); /* $/ */
1034 Safefree(PL_osname); /* $^O */
1037 SvREFCNT_dec(PL_statname);
1041 /* defgv, aka *_ should be taken care of elsewhere */
1044 Safefree(PL_efloatbuf);
1045 PL_efloatbuf = NULL;
1048 /* startup and shutdown function lists */
1049 SvREFCNT_dec(PL_beginav);
1050 SvREFCNT_dec(PL_beginav_save);
1051 SvREFCNT_dec(PL_endav);
1052 SvREFCNT_dec(PL_checkav);
1053 SvREFCNT_dec(PL_checkav_save);
1054 SvREFCNT_dec(PL_unitcheckav);
1055 SvREFCNT_dec(PL_unitcheckav_save);
1056 SvREFCNT_dec(PL_initav);
1058 PL_beginav_save = NULL;
1061 PL_checkav_save = NULL;
1062 PL_unitcheckav = NULL;
1063 PL_unitcheckav_save = NULL;
1066 /* shortcuts just get cleared */
1069 PL_argvoutgv = NULL;
1072 PL_last_in_gv = NULL;
1083 SvREFCNT_dec(PL_envgv);
1084 SvREFCNT_dec(PL_incgv);
1085 SvREFCNT_dec(PL_argvgv);
1086 SvREFCNT_dec(PL_replgv);
1087 SvREFCNT_dec(PL_DBgv);
1088 SvREFCNT_dec(PL_DBline);
1089 SvREFCNT_dec(PL_DBsub);
1098 SvREFCNT_dec(PL_argvout_stack);
1099 PL_argvout_stack = NULL;
1101 SvREFCNT_dec(PL_modglobal);
1102 PL_modglobal = NULL;
1103 SvREFCNT_dec(PL_preambleav);
1104 PL_preambleav = NULL;
1105 SvREFCNT_dec(PL_subname);
1107 #ifdef PERL_USES_PL_PIDSTATUS
1108 SvREFCNT_dec(PL_pidstatus);
1109 PL_pidstatus = NULL;
1111 SvREFCNT_dec(PL_toptarget);
1112 PL_toptarget = NULL;
1113 SvREFCNT_dec(PL_bodytarget);
1114 PL_bodytarget = NULL;
1115 PL_formtarget = NULL;
1117 /* free locale stuff */
1118 #ifdef USE_LOCALE_COLLATE
1119 Safefree(PL_collation_name);
1120 PL_collation_name = NULL;
1123 #ifdef USE_LOCALE_NUMERIC
1124 Safefree(PL_numeric_name);
1125 PL_numeric_name = NULL;
1126 SvREFCNT_dec(PL_numeric_radix_sv);
1127 PL_numeric_radix_sv = NULL;
1130 if (PL_langinfo_buf) {
1131 Safefree(PL_langinfo_buf);
1132 PL_langinfo_buf = NULL;
1135 /* clear character classes */
1136 for (i = 0; i < POSIX_SWASH_COUNT; i++) {
1137 SvREFCNT_dec(PL_utf8_swash_ptrs[i]);
1138 PL_utf8_swash_ptrs[i] = NULL;
1140 SvREFCNT_dec(PL_utf8_mark);
1141 SvREFCNT_dec(PL_utf8_toupper);
1142 SvREFCNT_dec(PL_utf8_totitle);
1143 SvREFCNT_dec(PL_utf8_tolower);
1144 SvREFCNT_dec(PL_utf8_tofold);
1145 SvREFCNT_dec(PL_utf8_idstart);
1146 SvREFCNT_dec(PL_utf8_idcont);
1147 SvREFCNT_dec(PL_utf8_foldable);
1148 SvREFCNT_dec(PL_utf8_foldclosures);
1149 SvREFCNT_dec(PL_AboveLatin1);
1150 SvREFCNT_dec(PL_InBitmap);
1151 SvREFCNT_dec(PL_UpperLatin1);
1152 SvREFCNT_dec(PL_Latin1);
1153 SvREFCNT_dec(PL_NonL1NonFinalFold);
1154 SvREFCNT_dec(PL_HasMultiCharFold);
1155 #ifdef USE_LOCALE_CTYPE
1156 SvREFCNT_dec(PL_warn_locale);
1158 PL_utf8_mark = NULL;
1159 PL_utf8_toupper = NULL;
1160 PL_utf8_totitle = NULL;
1161 PL_utf8_tolower = NULL;
1162 PL_utf8_tofold = NULL;
1163 PL_utf8_idstart = NULL;
1164 PL_utf8_idcont = NULL;
1165 PL_utf8_foldclosures = NULL;
1166 PL_AboveLatin1 = NULL;
1168 PL_HasMultiCharFold = NULL;
1169 #ifdef USE_LOCALE_CTYPE
1170 PL_warn_locale = NULL;
1173 PL_NonL1NonFinalFold = NULL;
1174 PL_UpperLatin1 = NULL;
1175 for (i = 0; i < POSIX_CC_COUNT; i++) {
1176 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1177 PL_XPosix_ptrs[i] = NULL;
1179 PL_GCB_invlist = NULL;
1180 PL_LB_invlist = NULL;
1181 PL_SB_invlist = NULL;
1182 PL_WB_invlist = NULL;
1183 PL_Assigned_invlist = NULL;
1185 if (!specialWARN(PL_compiling.cop_warnings))
1186 PerlMemShared_free(PL_compiling.cop_warnings);
1187 PL_compiling.cop_warnings = NULL;
1188 cophh_free(CopHINTHASH_get(&PL_compiling));
1189 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1190 CopFILE_free(&PL_compiling);
1192 /* Prepare to destruct main symbol table. */
1195 /* break ref loop *:: <=> %:: */
1196 (void)hv_deletes(hv, "main::", G_DISCARD);
1199 SvREFCNT_dec(PL_curstname);
1200 PL_curstname = NULL;
1202 /* clear queued errors */
1203 SvREFCNT_dec(PL_errors);
1206 SvREFCNT_dec(PL_isarev);
1209 if (destruct_level >= 2) {
1210 if (PL_scopestack_ix != 0)
1211 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1212 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1213 (long)PL_scopestack_ix);
1214 if (PL_savestack_ix != 0)
1215 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1216 "Unbalanced saves: %ld more saves than restores\n",
1217 (long)PL_savestack_ix);
1218 if (PL_tmps_floor != -1)
1219 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1220 (long)PL_tmps_floor + 1);
1221 if (cxstack_ix != -1)
1222 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1223 (long)cxstack_ix + 1);
1227 SvREFCNT_dec(PL_regex_padav);
1228 PL_regex_padav = NULL;
1229 PL_regex_pad = NULL;
1232 #ifdef PERL_IMPLICIT_CONTEXT
1233 /* the entries in this list are allocated via SV PVX's, so get freed
1234 * in sv_clean_all */
1235 Safefree(PL_my_cxt_list);
1238 /* Now absolutely destruct everything, somehow or other, loops or no. */
1240 /* the 2 is for PL_fdpid and PL_strtab */
1241 while (sv_clean_all() > 2)
1245 Safefree(PL_stashpad); /* must come after sv_clean_all */
1248 AvREAL_off(PL_fdpid); /* no surviving entries */
1249 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1252 #ifdef HAVE_INTERP_INTERN
1256 /* constant strings */
1257 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1258 SvREFCNT_dec(PL_sv_consts[i]);
1259 PL_sv_consts[i] = NULL;
1262 /* Destruct the global string table. */
1264 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1265 * so that sv_free() won't fail on them.
1266 * Now that the global string table is using a single hunk of memory
1267 * for both HE and HEK, we either need to explicitly unshare it the
1268 * correct way, or actually free things here.
1271 const I32 max = HvMAX(PL_strtab);
1272 HE * const * const array = HvARRAY(PL_strtab);
1273 HE *hent = array[0];
1276 if (hent && ckWARN_d(WARN_INTERNAL)) {
1277 HE * const next = HeNEXT(hent);
1278 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1279 "Unbalanced string table refcount: (%ld) for \"%s\"",
1280 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1287 hent = array[riter];
1292 HvARRAY(PL_strtab) = 0;
1293 HvTOTALKEYS(PL_strtab) = 0;
1295 SvREFCNT_dec(PL_strtab);
1298 /* free the pointer tables used for cloning */
1299 ptr_table_free(PL_ptr_table);
1300 PL_ptr_table = (PTR_TBL_t*)NULL;
1303 /* free special SVs */
1305 SvREFCNT(&PL_sv_yes) = 0;
1306 sv_clear(&PL_sv_yes);
1307 SvANY(&PL_sv_yes) = NULL;
1308 SvFLAGS(&PL_sv_yes) = 0;
1310 SvREFCNT(&PL_sv_no) = 0;
1311 sv_clear(&PL_sv_no);
1312 SvANY(&PL_sv_no) = NULL;
1313 SvFLAGS(&PL_sv_no) = 0;
1315 SvREFCNT(&PL_sv_zero) = 0;
1316 sv_clear(&PL_sv_zero);
1317 SvANY(&PL_sv_zero) = NULL;
1318 SvFLAGS(&PL_sv_zero) = 0;
1322 for (i=0; i<=2; i++) {
1323 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1324 sv_clear(PERL_DEBUG_PAD(i));
1325 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1326 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1330 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1331 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1333 #ifdef DEBUG_LEAKING_SCALARS
1334 if (PL_sv_count != 0) {
1339 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1340 svend = &sva[SvREFCNT(sva)];
1341 for (sv = sva + 1; sv < svend; ++sv) {
1342 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1343 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1345 " refcnt=%"UVuf pTHX__FORMAT "\n"
1346 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1347 "serial %" UVuf "\n",
1348 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1350 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1352 sv->sv_debug_inpad ? "for" : "by",
1353 sv->sv_debug_optype ?
1354 PL_op_name[sv->sv_debug_optype]: "(none)",
1355 PTR2UV(sv->sv_debug_parent),
1358 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1359 Perl_dump_sv_child(aTHX_ sv);
1365 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1369 /* Wait for up to 4 seconds for child to terminate.
1370 This seems to be the least effort way of timing out on reaping
1372 struct timeval waitfor = {4, 0};
1373 int sock = PL_dumper_fd;
1377 FD_SET(sock, &rset);
1378 select(sock + 1, &rset, NULL, NULL, &waitfor);
1379 waitpid(child, &status, WNOHANG);
1384 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1390 #if defined(PERLIO_LAYERS)
1391 /* No more IO - including error messages ! */
1392 PerlIO_cleanup(aTHX);
1395 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1396 as currently layers use it rather than NULL as a marker
1397 for no arg - and will try and SvREFCNT_dec it.
1399 SvREFCNT(&PL_sv_undef) = 0;
1400 SvREADONLY_off(&PL_sv_undef);
1402 Safefree(PL_origfilename);
1403 PL_origfilename = NULL;
1404 Safefree(PL_reg_curpm);
1405 free_tied_hv_pool();
1406 Safefree(PL_op_mask);
1407 Safefree(PL_psig_name);
1408 PL_psig_name = (SV**)NULL;
1409 PL_psig_ptr = (SV**)NULL;
1411 /* We need to NULL PL_psig_pend first, so that
1412 signal handlers know not to use it */
1413 int *psig_save = PL_psig_pend;
1414 PL_psig_pend = (int*)NULL;
1415 Safefree(psig_save);
1418 TAINTING_set(FALSE);
1419 TAINT_WARN_set(FALSE);
1420 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1422 DEBUG_P(debprofdump());
1426 #ifdef USE_REENTRANT_API
1427 Perl_reentrant_free(aTHX);
1430 /* These all point to HVs that are about to be blown away.
1431 Code in core and on CPAN assumes that if the interpreter is re-started
1432 that they will be cleanly NULL or pointing to a valid HV. */
1433 PL_custom_op_names = NULL;
1434 PL_custom_op_descs = NULL;
1435 PL_custom_ops = NULL;
1439 while (PL_regmatch_slab) {
1440 regmatch_slab *s = PL_regmatch_slab;
1441 PL_regmatch_slab = PL_regmatch_slab->next;
1445 /* As the absolutely last thing, free the non-arena SV for mess() */
1448 /* we know that type == SVt_PVMG */
1450 /* it could have accumulated taint magic */
1453 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1454 moremagic = mg->mg_moremagic;
1455 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1457 Safefree(mg->mg_ptr);
1461 /* we know that type >= SVt_PV */
1462 SvPV_free(PL_mess_sv);
1463 Safefree(SvANY(PL_mess_sv));
1464 Safefree(PL_mess_sv);
1471 =for apidoc perl_free
1473 Releases a Perl interpreter. See L<perlembed>.
1483 PERL_ARGS_ASSERT_PERL_FREE;
1485 if (PL_veto_cleanup)
1488 #ifdef PERL_TRACK_MEMPOOL
1491 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1492 * value as we're probably hunting memory leaks then
1494 if (PL_perl_destruct_level == 0) {
1495 const U32 old_debug = PL_debug;
1496 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1497 thread at thread exit. */
1499 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1500 "free this thread's memory\n");
1501 PL_debug &= ~ DEBUG_m_FLAG;
1503 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1504 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1505 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1508 PL_debug = old_debug;
1513 #if defined(WIN32) || defined(NETWARE)
1514 # if defined(PERL_IMPLICIT_SYS)
1517 void *host = nw_internal_host;
1518 PerlMem_free(aTHXx);
1519 nw_delete_internal_host(host);
1521 void *host = w32_internal_host;
1522 PerlMem_free(aTHXx);
1523 win32_delete_internal_host(host);
1527 PerlMem_free(aTHXx);
1530 PerlMem_free(aTHXx);
1534 #if defined(USE_ITHREADS)
1535 /* provide destructors to clean up the thread key when libperl is unloaded */
1536 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1538 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1539 #pragma fini "perl_fini"
1540 #elif defined(__sun) && !defined(__GNUC__)
1541 #pragma fini (perl_fini)
1545 #if defined(__GNUC__)
1546 __attribute__((destructor))
1552 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1555 PL_curinterp && !PL_veto_cleanup)
1560 #endif /* THREADS */
1563 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1565 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1566 PL_exitlist[PL_exitlistlen].fn = fn;
1567 PL_exitlist[PL_exitlistlen].ptr = ptr;
1572 =for apidoc perl_parse
1574 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1579 #define SET_CURSTASH(newstash) \
1580 if (PL_curstash != newstash) { \
1581 SvREFCNT_dec(PL_curstash); \
1582 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1586 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1593 PERL_ARGS_ASSERT_PERL_PARSE;
1594 #ifndef MULTIPLICITY
1595 PERL_UNUSED_ARG(my_perl);
1597 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1599 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1601 if (s && strEQ(s, "1")) {
1602 const unsigned char *seed= PERL_HASH_SEED;
1603 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1604 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1605 while (seed < seed_end) {
1606 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1608 #ifdef PERL_HASH_RANDOMIZE_KEYS
1609 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1610 PL_HASH_RAND_BITS_ENABLED,
1611 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1613 PerlIO_printf(Perl_debug_log, "\n");
1616 #endif /* #if (defined(USE_HASH_SEED) ... */
1620 struct NameTranslationInfo nti;
1621 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1628 if (PL_origalen != 0) {
1629 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1632 /* Set PL_origalen be the sum of the contiguous argv[]
1633 * elements plus the size of the env in case that it is
1634 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1635 * as the maximum modifiable length of $0. In the worst case
1636 * the area we are able to modify is limited to the size of
1637 * the original argv[0]. (See below for 'contiguous', though.)
1639 const char *s = NULL;
1640 const UV mask = ~(UV)(PTRSIZE-1);
1641 /* Do the mask check only if the args seem like aligned. */
1643 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1645 /* See if all the arguments are contiguous in memory. Note
1646 * that 'contiguous' is a loose term because some platforms
1647 * align the argv[] and the envp[]. If the arguments look
1648 * like non-aligned, assume that they are 'strictly' or
1649 * 'traditionally' contiguous. If the arguments look like
1650 * aligned, we just check that they are within aligned
1651 * PTRSIZE bytes. As long as no system has something bizarre
1652 * like the argv[] interleaved with some other data, we are
1653 * fine. (Did I just evoke Murphy's Law?) --jhi */
1654 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1657 for (i = 1; i < PL_origargc; i++) {
1658 if ((PL_origargv[i] == s + 1
1660 || PL_origargv[i] == s + 2
1665 (PL_origargv[i] > s &&
1667 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1678 #ifndef PERL_USE_SAFE_PUTENV
1679 /* Can we grab env area too to be used as the area for $0? */
1680 if (s && PL_origenviron && !PL_use_safe_putenv) {
1681 if ((PL_origenviron[0] == s + 1)
1684 (PL_origenviron[0] > s &&
1685 PL_origenviron[0] <=
1686 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1690 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1691 s = PL_origenviron[0];
1694 my_setenv("NoNe SuCh", NULL);
1695 /* Force copy of environment. */
1696 for (i = 1; PL_origenviron[i]; i++) {
1697 if (PL_origenviron[i] == s + 1
1700 (PL_origenviron[i] > s &&
1701 PL_origenviron[i] <=
1702 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1705 s = PL_origenviron[i];
1713 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1715 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1720 /* Come here if running an undumped a.out. */
1722 PL_origfilename = savepv(argv[0]);
1723 PL_do_undump = FALSE;
1724 cxstack_ix = -1; /* start label stack again */
1726 assert (!TAINT_get);
1730 init_postdump_symbols(argc,argv,env);
1735 op_free(PL_main_root);
1736 PL_main_root = NULL;
1738 PL_main_start = NULL;
1739 SvREFCNT_dec(PL_main_cv);
1743 oldscope = PL_scopestack_ix;
1744 PL_dowarn = G_WARN_OFF;
1749 parse_body(env,xsinit);
1750 if (PL_unitcheckav) {
1751 call_list(oldscope, PL_unitcheckav);
1754 PERL_SET_PHASE(PERL_PHASE_CHECK);
1755 call_list(oldscope, PL_checkav);
1763 /* my_exit() was called */
1764 while (PL_scopestack_ix > oldscope)
1767 SET_CURSTASH(PL_defstash);
1768 if (PL_unitcheckav) {
1769 call_list(oldscope, PL_unitcheckav);
1772 PERL_SET_PHASE(PERL_PHASE_CHECK);
1773 call_list(oldscope, PL_checkav);
1778 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1786 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1787 miniperl, and we need to see those flags reflected in the values here. */
1789 /* What this returns is subject to change. Use the public interface in Config.
1792 S_Internals_V(pTHX_ CV *cv)
1795 #ifdef LOCAL_PATCH_COUNT
1796 const int local_patch_count = LOCAL_PATCH_COUNT;
1798 const int local_patch_count = 0;
1800 const int entries = 3 + local_patch_count;
1802 static const char non_bincompat_options[] =
1809 # ifdef NO_HASH_SEED
1812 # ifdef NO_TAINT_SUPPORT
1815 # ifdef PERL_BOOL_AS_CHAR
1816 " PERL_BOOL_AS_CHAR"
1818 # ifdef PERL_COPY_ON_WRITE
1819 " PERL_COPY_ON_WRITE"
1821 # ifdef PERL_DISABLE_PMC
1824 # ifdef PERL_DONT_CREATE_GVSV
1825 " PERL_DONT_CREATE_GVSV"
1827 # ifdef PERL_EXTERNAL_GLOB
1828 " PERL_EXTERNAL_GLOB"
1830 # ifdef PERL_HASH_FUNC_SIPHASH
1831 " PERL_HASH_FUNC_SIPHASH"
1833 # ifdef PERL_HASH_FUNC_SDBM
1834 " PERL_HASH_FUNC_SDBM"
1836 # ifdef PERL_HASH_FUNC_DJB2
1837 " PERL_HASH_FUNC_DJB2"
1839 # ifdef PERL_HASH_FUNC_SUPERFAST
1840 " PERL_HASH_FUNC_SUPERFAST"
1842 # ifdef PERL_HASH_FUNC_MURMUR3
1843 " PERL_HASH_FUNC_MURMUR3"
1845 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1846 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1848 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1849 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1851 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1852 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1854 # ifdef PERL_IS_MINIPERL
1857 # ifdef PERL_MALLOC_WRAP
1860 # ifdef PERL_MEM_LOG
1863 # ifdef PERL_MEM_LOG_NOIMPL
1864 " PERL_MEM_LOG_NOIMPL"
1866 # ifdef PERL_OP_PARENT
1869 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1870 " PERL_PERTURB_KEYS_DETERMINISTIC"
1872 # ifdef PERL_PERTURB_KEYS_DISABLED
1873 " PERL_PERTURB_KEYS_DISABLED"
1875 # ifdef PERL_PERTURB_KEYS_RANDOM
1876 " PERL_PERTURB_KEYS_RANDOM"
1878 # ifdef PERL_PRESERVE_IVUV
1879 " PERL_PRESERVE_IVUV"
1881 # ifdef PERL_RELOCATABLE_INCPUSH
1882 " PERL_RELOCATABLE_INCPUSH"
1884 # ifdef PERL_USE_DEVEL
1887 # ifdef PERL_USE_SAFE_PUTENV
1888 " PERL_USE_SAFE_PUTENV"
1890 # ifdef SILENT_NO_TAINT_SUPPORT
1891 " SILENT_NO_TAINT_SUPPORT"
1893 # ifdef UNLINK_ALL_VERSIONS
1894 " UNLINK_ALL_VERSIONS"
1896 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1897 " USE_ATTRIBUTES_FOR_PERLIO"
1899 # ifdef USE_FAST_STDIO
1905 # ifdef USE_LOCALE_CTYPE
1908 # ifdef WIN32_NO_REGISTRY
1911 # ifdef USE_PERL_ATOF
1914 # ifdef USE_SITECUSTOMIZE
1915 " USE_SITECUSTOMIZE"
1918 PERL_UNUSED_ARG(cv);
1919 PERL_UNUSED_VAR(items);
1921 EXTEND(SP, entries);
1923 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1924 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1925 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1927 #ifndef PERL_BUILD_DATE
1930 # define PERL_BUILD_DATE __DATE__ " " __TIME__
1932 # define PERL_BUILD_DATE __DATE__
1937 #ifdef PERL_BUILD_DATE
1938 PUSHs(Perl_newSVpvn_flags(aTHX_
1939 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
1942 PUSHs(&PL_sv_undef);
1945 for (i = 1; i <= local_patch_count; i++) {
1946 /* This will be an undef, if PL_localpatches[i] is NULL. */
1947 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1953 #define INCPUSH_UNSHIFT 0x01
1954 #define INCPUSH_ADD_OLD_VERS 0x02
1955 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1956 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1957 #define INCPUSH_NOT_BASEDIR 0x10
1958 #define INCPUSH_CAN_RELOCATE 0x20
1959 #define INCPUSH_ADD_SUB_DIRS \
1960 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1963 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1967 int argc = PL_origargc;
1968 char **argv = PL_origargv;
1969 const char *scriptname = NULL;
1970 bool dosearch = FALSE;
1972 bool doextract = FALSE;
1973 const char *cddir = NULL;
1974 #ifdef USE_SITECUSTOMIZE
1975 bool minus_f = FALSE;
1977 SV *linestr_sv = NULL;
1978 bool add_read_e_script = FALSE;
1979 U32 lex_start_flags = 0;
1981 PERL_SET_PHASE(PERL_PHASE_START);
1987 for (argc--,argv++; argc > 0; argc--,argv++) {
1988 if (argv[0][0] != '-' || !argv[0][1])
1994 #ifndef PERL_STRICT_CR
2018 if ((s = moreswitches(s)))
2023 #if defined(SILENT_NO_TAINT_SUPPORT)
2024 /* silently ignore */
2025 #elif defined(NO_TAINT_SUPPORT)
2026 Perl_croak_nocontext("This perl was compiled without taint support. "
2027 "Cowardly refusing to run with -t or -T flags");
2029 CHECK_MALLOC_TOO_LATE_FOR('t');
2030 if( !TAINTING_get ) {
2031 TAINT_WARN_set(TRUE);
2038 #if defined(SILENT_NO_TAINT_SUPPORT)
2039 /* silently ignore */
2040 #elif defined(NO_TAINT_SUPPORT)
2041 Perl_croak_nocontext("This perl was compiled without taint support. "
2042 "Cowardly refusing to run with -t or -T flags");
2044 CHECK_MALLOC_TOO_LATE_FOR('T');
2046 TAINT_WARN_set(FALSE);
2055 forbid_setid('e', FALSE);
2057 PL_e_script = newSVpvs("");
2058 add_read_e_script = TRUE;
2061 sv_catpv(PL_e_script, s);
2063 sv_catpv(PL_e_script, argv[1]);
2067 Perl_croak(aTHX_ "No code specified for -%c", c);
2068 sv_catpvs(PL_e_script, "\n");
2072 #ifdef USE_SITECUSTOMIZE
2078 case 'I': /* -I handled both here and in moreswitches() */
2079 forbid_setid('I', FALSE);
2080 if (!*++s && (s=argv[1]) != NULL) {
2084 STRLEN len = strlen(s);
2085 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2088 Perl_croak(aTHX_ "No directory specified for -I");
2091 forbid_setid('S', FALSE);
2100 opts_prog = newSVpvs("use Config; Config::_V()");
2104 opts_prog = Perl_newSVpvf(aTHX_
2105 "use Config; Config::config_vars(qw%c%s%c)",
2109 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2110 /* don't look for script or read stdin */
2111 scriptname = BIT_BUCKET;
2123 if (!*++s || isSPACE(*s)) {
2127 /* catch use of gnu style long options.
2128 Both of these exit immediately. */
2129 if (strEQ(s, "version"))
2131 if (strEQ(s, "help"))
2136 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2147 #ifndef SECURE_INTERNAL_GETENV
2150 (s = PerlEnv_getenv("PERL5OPT")))
2152 /* s points to static memory in getenv(), which may be overwritten at
2153 * any time; use a mortal copy instead */
2154 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2158 if (*s == '-' && *(s+1) == 'T') {
2159 #if defined(SILENT_NO_TAINT_SUPPORT)
2160 /* silently ignore */
2161 #elif defined(NO_TAINT_SUPPORT)
2162 Perl_croak_nocontext("This perl was compiled without taint support. "
2163 "Cowardly refusing to run with -t or -T flags");
2165 CHECK_MALLOC_TOO_LATE_FOR('T');
2167 TAINT_WARN_set(FALSE);
2171 char *popt_copy = NULL;
2184 if (!strchr("CDIMUdmtwW", *s))
2185 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2189 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2190 s = popt_copy + (s - d);
2198 #if defined(SILENT_NO_TAINT_SUPPORT)
2199 /* silently ignore */
2200 #elif defined(NO_TAINT_SUPPORT)
2201 Perl_croak_nocontext("This perl was compiled without taint support. "
2202 "Cowardly refusing to run with -t or -T flags");
2204 if( !TAINTING_get) {
2205 TAINT_WARN_set(TRUE);
2217 #ifndef NO_PERL_INTERNAL_RAND_SEED
2218 /* If we're not set[ug]id, we might have honored
2219 PERL_INTERNAL_RAND_SEED in perl_construct().
2220 At this point command-line options have been parsed, so if
2221 we're now tainting and not set[ug]id re-seed.
2222 This could possibly be wasteful if PERL_INTERNAL_RAND_SEED is invalid,
2223 but avoids duplicating the logic from perl_construct().
2226 PerlProc_getuid() == PerlProc_geteuid() &&
2227 PerlProc_getgid() == PerlProc_getegid()) {
2228 Perl_drand48_init_r(&PL_internal_random_state, seed());
2232 /* Set $^X early so that it can be used for relocatable paths in @INC */
2233 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2234 assert (!TAINT_get);
2239 #if defined(USE_SITECUSTOMIZE)
2241 /* The games with local $! are to avoid setting errno if there is no
2242 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2243 ie a q() operator with a NUL byte as a the delimiter. This avoids
2244 problems with pathnames containing (say) ' */
2245 # ifdef PERL_IS_MINIPERL
2246 AV *const inc = GvAV(PL_incgv);
2247 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2250 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2251 it should be reported immediately as a build failure. */
2252 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2254 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2255 "do {local $!; -f $f }"
2256 " and do $f || die $@ || qq '$f: $!' }",
2257 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2260 /* SITELIB_EXP is a function call on Win32. */
2261 const char *const raw_sitelib = SITELIB_EXP;
2263 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2264 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2265 INCPUSH_CAN_RELOCATE);
2266 const char *const sitelib = SvPVX(sitelib_sv);
2267 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2269 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2270 0, SVfARG(sitelib), 0,
2271 0, SVfARG(sitelib), 0));
2272 assert (SvREFCNT(sitelib_sv) == 1);
2273 SvREFCNT_dec(sitelib_sv);
2280 scriptname = argv[0];
2283 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2285 else if (scriptname == NULL) {
2287 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2293 assert (!TAINT_get);
2297 bool suidscript = FALSE;
2299 rsfp = open_script(scriptname, dosearch, &suidscript);
2301 rsfp = PerlIO_stdin();
2302 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2305 validate_suid(rsfp);
2308 # if defined(SIGCHLD) || defined(SIGCLD)
2311 # define SIGCHLD SIGCLD
2313 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2314 if (sigstate == (Sighandler_t) SIG_IGN) {
2315 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2316 "Can't ignore signal CHLD, forcing to default");
2317 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2325 /* This will croak if suidscript is true, as -x cannot be used with
2327 forbid_setid('x', suidscript);
2328 /* Hence you can't get here if suidscript is true */
2330 linestr_sv = newSV_type(SVt_PV);
2331 lex_start_flags |= LEX_START_COPIED;
2332 find_beginning(linestr_sv, rsfp);
2333 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2334 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2338 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2339 CvUNIQUE_on(PL_compcv);
2341 CvPADLIST_set(PL_compcv, pad_new(0));
2343 PL_isarev = newHV();
2346 boot_core_UNIVERSAL();
2348 newXS("Internals::V", S_Internals_V, __FILE__);
2351 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2353 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2359 # ifdef HAS_SOCKS5_INIT
2360 socks5_init(argv[0]);
2366 init_predump_symbols();
2367 /* init_postdump_symbols not currently designed to be called */
2368 /* more than once (ENV isn't cleared first, for example) */
2369 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2371 init_postdump_symbols(argc,argv,env);
2373 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2374 * or explicitly in some platforms.
2375 * PL_utf8locale is conditionally turned on by
2376 * locale.c:Perl_init_i18nl10n() if the environment
2377 * look like the user wants to use UTF-8. */
2378 #if defined(__SYMBIAN32__)
2379 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2381 # ifndef PERL_IS_MINIPERL
2383 /* Requires init_predump_symbols(). */
2384 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2389 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2390 * and the default open disciplines. */
2391 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2392 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2394 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2395 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2396 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2398 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2399 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2400 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2402 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2403 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2404 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2406 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2407 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2410 sv_setpvs(sv, ":utf8\0:utf8");
2412 sv_setpvs(sv, ":utf8\0");
2415 sv_setpvs(sv, "\0:utf8");
2424 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2425 if (strEQ(s, "unsafe"))
2426 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2427 else if (strEQ(s, "safe"))
2428 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2430 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2435 lex_start(linestr_sv, rsfp, lex_start_flags);
2436 SvREFCNT_dec(linestr_sv);
2438 PL_subname = newSVpvs("main");
2440 if (add_read_e_script)
2441 filter_add(read_e_script, NULL);
2443 /* now parse the script */
2445 SETERRNO(0,SS_NORMAL);
2446 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2447 abort_execution("", PL_origfilename);
2449 CopLINE_set(PL_curcop, 0);
2450 SET_CURSTASH(PL_defstash);
2452 SvREFCNT_dec(PL_e_script);
2460 SAVECOPFILE(PL_curcop);
2461 SAVECOPLINE(PL_curcop);
2462 gv_check(PL_defstash);
2472 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2473 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2474 dump_mstats("after compilation:");
2479 PL_restartjmpenv = NULL;
2485 =for apidoc perl_run
2487 Tells a Perl interpreter to run. See L<perlembed>.
2499 PERL_ARGS_ASSERT_PERL_RUN;
2500 #ifndef MULTIPLICITY
2501 PERL_UNUSED_ARG(my_perl);
2504 oldscope = PL_scopestack_ix;
2512 cxstack_ix = -1; /* start context stack again */
2514 case 0: /* normal completion */
2518 case 2: /* my_exit() */
2519 while (PL_scopestack_ix > oldscope)
2522 SET_CURSTASH(PL_defstash);
2523 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2524 PL_endav && !PL_minus_c) {
2525 PERL_SET_PHASE(PERL_PHASE_END);
2526 call_list(oldscope, PL_endav);
2529 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2530 dump_mstats("after execution: ");
2536 POPSTACK_TO(PL_mainstack);
2539 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2550 S_run_body(pTHX_ I32 oldscope)
2552 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2553 PL_sawampersand ? "Enabling" : "Omitting",
2554 (unsigned int)(PL_sawampersand)));
2556 if (!PL_restartop) {
2558 if (DEBUG_x_TEST || DEBUG_B_TEST)
2559 dump_all_perl(!DEBUG_B_TEST);
2561 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2565 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2568 if (PERLDB_SINGLE && PL_DBsingle)
2571 PERL_SET_PHASE(PERL_PHASE_INIT);
2572 call_list(oldscope, PL_initav);
2574 #ifdef PERL_DEBUG_READONLY_OPS
2575 if (PL_main_root && PL_main_root->op_slabbed)
2576 Slab_to_ro(OpSLAB(PL_main_root));
2582 PERL_SET_PHASE(PERL_PHASE_RUN);
2585 PL_restartjmpenv = NULL;
2586 PL_op = PL_restartop;
2590 else if (PL_main_start) {
2591 CvDEPTH(PL_main_cv) = 1;
2592 PL_op = PL_main_start;
2596 NOT_REACHED; /* NOTREACHED */
2600 =head1 SV Manipulation Functions
2602 =for apidoc p||get_sv
2604 Returns the SV of the specified Perl scalar. C<flags> are passed to
2605 C<gv_fetchpv>. If C<GV_ADD> is set and the
2606 Perl variable does not exist then it will be created. If C<flags> is zero
2607 and the variable does not exist then NULL is returned.
2613 Perl_get_sv(pTHX_ const char *name, I32 flags)
2617 PERL_ARGS_ASSERT_GET_SV;
2619 gv = gv_fetchpv(name, flags, SVt_PV);
2626 =head1 Array Manipulation Functions
2628 =for apidoc p||get_av
2630 Returns the AV of the specified Perl global or package array with the given
2631 name (so it won't work on lexical variables). C<flags> are passed
2632 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2633 Perl variable does not exist then it will be created. If C<flags> is zero
2634 and the variable does not exist then NULL is returned.
2636 Perl equivalent: C<@{"$name"}>.
2642 Perl_get_av(pTHX_ const char *name, I32 flags)
2644 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2646 PERL_ARGS_ASSERT_GET_AV;
2656 =head1 Hash Manipulation Functions
2658 =for apidoc p||get_hv
2660 Returns the HV of the specified Perl hash. C<flags> are passed to
2661 C<gv_fetchpv>. If C<GV_ADD> is set and the
2662 Perl variable does not exist then it will be created. If C<flags> is zero
2663 and the variable does not exist then C<NULL> is returned.
2669 Perl_get_hv(pTHX_ const char *name, I32 flags)
2671 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2673 PERL_ARGS_ASSERT_GET_HV;
2683 =head1 CV Manipulation Functions
2685 =for apidoc p||get_cvn_flags
2687 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2688 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2689 exist then it will be declared (which has the same effect as saying
2690 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2691 then NULL is returned.
2693 =for apidoc p||get_cv
2695 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2701 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2703 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2705 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2707 if (gv && UNLIKELY(SvROK(gv)) && SvTYPE(SvRV((SV *)gv)) == SVt_PVCV)
2708 return (CV*)SvRV((SV *)gv);
2710 /* XXX this is probably not what they think they're getting.
2711 * It has the same effect as "sub name;", i.e. just a forward
2713 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2714 return newSTUB(gv,0);
2721 /* Nothing in core calls this now, but we can't replace it with a macro and
2722 move it to mathoms.c as a macro would evaluate name twice. */
2724 Perl_get_cv(pTHX_ const char *name, I32 flags)
2726 PERL_ARGS_ASSERT_GET_CV;
2728 return get_cvn_flags(name, strlen(name), flags);
2731 /* Be sure to refetch the stack pointer after calling these routines. */
2735 =head1 Callback Functions
2737 =for apidoc p||call_argv
2739 Performs a callback to the specified named and package-scoped Perl subroutine
2740 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2743 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2749 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2751 /* See G_* flags in cop.h */
2752 /* null terminated arg list */
2756 PERL_ARGS_ASSERT_CALL_ARGV;
2760 mXPUSHs(newSVpv(*argv,0));
2764 return call_pv(sub_name, flags);
2768 =for apidoc p||call_pv
2770 Performs a callback to the specified Perl sub. See L<perlcall>.
2776 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2777 /* name of the subroutine */
2778 /* See G_* flags in cop.h */
2780 PERL_ARGS_ASSERT_CALL_PV;
2782 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2786 =for apidoc p||call_method
2788 Performs a callback to the specified Perl method. The blessed object must
2789 be on the stack. See L<perlcall>.
2795 Perl_call_method(pTHX_ const char *methname, I32 flags)
2796 /* name of the subroutine */
2797 /* See G_* flags in cop.h */
2801 PERL_ARGS_ASSERT_CALL_METHOD;
2803 len = strlen(methname);
2804 sv = flags & G_METHOD_NAMED
2805 ? sv_2mortal(newSVpvn_share(methname, len,0))
2806 : newSVpvn_flags(methname, len, SVs_TEMP);
2808 return call_sv(sv, flags | G_METHOD);
2811 /* May be called with any of a CV, a GV, or an SV containing the name. */
2813 =for apidoc p||call_sv
2815 Performs a callback to the Perl sub specified by the SV.
2817 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2818 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2819 or C<SvPV(sv)> will be used as the name of the sub to call.
2821 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2822 C<SvPV(sv)> will be used as the name of the method to call.
2824 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2825 the name of the method to call.
2827 Some other values are treated specially for internal use and should
2836 Perl_call_sv(pTHX_ SV *sv, volatile I32 flags)
2837 /* See G_* flags in cop.h */
2840 LOGOP myop; /* fake syntax tree node */
2843 volatile I32 retval = 0;
2844 bool oldcatch = CATCH_GET;
2846 OP* const oldop = PL_op;
2849 PERL_ARGS_ASSERT_CALL_SV;
2851 if (flags & G_DISCARD) {
2855 if (!(flags & G_WANT)) {
2856 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2861 Zero(&myop, 1, LOGOP);
2862 if (!(flags & G_NOARGS))
2863 myop.op_flags |= OPf_STACKED;
2864 myop.op_flags |= OP_GIMME_REVERSE(flags);
2868 if (!(flags & G_METHOD_NAMED)) {
2876 if (PERLDB_SUB && PL_curstash != PL_debstash
2877 /* Handle first BEGIN of -d. */
2878 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2879 /* Try harder, since this may have been a sighandler, thus
2880 * curstash may be meaningless. */
2881 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2882 && !(flags & G_NODEBUG))
2883 myop.op_private |= OPpENTERSUB_DB;
2885 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2886 Zero(&method_op, 1, METHOP);
2887 method_op.op_next = (OP*)&myop;
2888 PL_op = (OP*)&method_op;
2889 if ( flags & G_METHOD_NAMED ) {
2890 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2891 method_op.op_type = OP_METHOD_NAMED;
2892 method_op.op_u.op_meth_sv = sv;
2894 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2895 method_op.op_type = OP_METHOD;
2897 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2898 myop.op_type = OP_ENTERSUB;
2901 if (!(flags & G_EVAL)) {
2903 CALL_BODY_SUB((OP*)&myop);
2904 retval = PL_stack_sp - (PL_stack_base + oldmark);
2905 CATCH_SET(oldcatch);
2909 myop.op_other = (OP*)&myop;
2911 old_cxix = cxstack_ix;
2912 create_eval_scope(NULL, flags|G_FAKINGEVAL);
2920 CALL_BODY_SUB((OP*)&myop);
2921 retval = PL_stack_sp - (PL_stack_base + oldmark);
2922 if (!(flags & G_KEEPERR)) {
2930 /* my_exit() was called */
2931 SET_CURSTASH(PL_defstash);
2935 NOT_REACHED; /* NOTREACHED */
2938 PL_restartjmpenv = NULL;
2939 PL_op = PL_restartop;
2943 PL_stack_sp = PL_stack_base + oldmark;
2944 if ((flags & G_WANT) == G_ARRAY)
2948 *++PL_stack_sp = &PL_sv_undef;
2953 /* if we croaked, depending on how we croaked the eval scope
2954 * may or may not have already been popped */
2955 if (cxstack_ix > old_cxix) {
2956 assert(cxstack_ix == old_cxix + 1);
2957 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
2958 delete_eval_scope();
2963 if (flags & G_DISCARD) {
2964 PL_stack_sp = PL_stack_base + oldmark;
2973 /* Eval a string. The G_EVAL flag is always assumed. */
2976 =for apidoc p||eval_sv
2978 Tells Perl to C<eval> the string in the SV. It supports the same flags
2979 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
2985 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2987 /* See G_* flags in cop.h */
2990 UNOP myop; /* fake syntax tree node */
2991 volatile I32 oldmark;
2992 volatile I32 retval = 0;
2994 OP* const oldop = PL_op;
2997 PERL_ARGS_ASSERT_EVAL_SV;
2999 if (flags & G_DISCARD) {
3006 Zero(&myop, 1, UNOP);
3009 oldmark = SP - PL_stack_base;
3015 if (!(flags & G_NOARGS))
3016 myop.op_flags = OPf_STACKED;
3017 myop.op_type = OP_ENTEREVAL;
3018 myop.op_flags |= OP_GIMME_REVERSE(flags);
3019 if (flags & G_KEEPERR)
3020 myop.op_flags |= OPf_SPECIAL;
3022 if (flags & G_RE_REPARSING)
3023 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
3025 /* fail now; otherwise we could fail after the JMPENV_PUSH but
3026 * before a cx_pusheval(), which corrupts the stack after a croak */
3027 TAINT_PROPER("eval_sv()");
3033 if (PL_op == (OP*)(&myop)) {
3034 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
3036 goto fail; /* failed in compilation */
3039 retval = PL_stack_sp - (PL_stack_base + oldmark);
3040 if (!(flags & G_KEEPERR)) {
3048 /* my_exit() was called */
3049 SET_CURSTASH(PL_defstash);
3053 NOT_REACHED; /* NOTREACHED */
3056 PL_restartjmpenv = NULL;
3057 PL_op = PL_restartop;
3062 PL_stack_sp = PL_stack_base + oldmark;
3063 if ((flags & G_WANT) == G_ARRAY)
3067 *++PL_stack_sp = &PL_sv_undef;
3073 if (flags & G_DISCARD) {
3074 PL_stack_sp = PL_stack_base + oldmark;
3084 =for apidoc p||eval_pv
3086 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3092 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3094 SV* sv = newSVpv(p, 0);
3096 PERL_ARGS_ASSERT_EVAL_PV;
3098 eval_sv(sv, G_SCALAR);
3107 /* just check empty string or undef? */
3108 if (croak_on_error) {
3109 SV * const errsv = ERRSV;
3110 if(SvTRUE_NN(errsv))
3111 /* replace with croak_sv? */
3112 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3118 /* Require a module. */
3121 =head1 Embedding Functions
3123 =for apidoc p||require_pv
3125 Tells Perl to C<require> the file named by the string argument. It is
3126 analogous to the Perl code C<eval "require '$file'">. It's even
3127 implemented that way; consider using load_module instead.
3132 Perl_require_pv(pTHX_ const char *pv)
3137 PERL_ARGS_ASSERT_REQUIRE_PV;
3139 PUSHSTACKi(PERLSI_REQUIRE);
3140 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3141 eval_sv(sv_2mortal(sv), G_DISCARD);
3146 S_usage(pTHX) /* XXX move this out into a module ? */
3148 /* This message really ought to be max 23 lines.
3149 * Removed -h because the user already knows that option. Others? */
3151 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3152 minimum of 509 character string literals. */
3153 static const char * const usage_msg[] = {
3154 " -0[octal] specify record separator (\\0, if no argument)\n"
3155 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3156 " -C[number/list] enables the listed Unicode features\n"
3157 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3158 " -d[:debugger] run program under debugger\n"
3159 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3160 " -e program one line of program (several -e's allowed, omit programfile)\n"
3161 " -E program like -e, but enables all optional features\n"
3162 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3163 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3164 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3165 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3166 " -l[octal] enable line ending processing, specifies line terminator\n"
3167 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3168 " -n assume \"while (<>) { ... }\" loop around program\n"
3169 " -p assume loop like -n but print line also, like sed\n"
3170 " -s enable rudimentary parsing for switches after programfile\n"
3171 " -S look for programfile using PATH environment variable\n",
3172 " -t enable tainting warnings\n"
3173 " -T enable tainting checks\n"
3174 " -u dump core after parsing program\n"
3175 " -U allow unsafe operations\n"
3176 " -v print version, patchlevel and license\n"
3177 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3178 " -w enable many useful warnings\n"
3179 " -W enable all warnings\n"
3180 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3181 " -X disable all warnings\n"
3183 "Run 'perldoc perl' for more help with Perl.\n\n",
3186 const char * const *p = usage_msg;
3187 PerlIO *out = PerlIO_stdout();
3190 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3193 PerlIO_puts(out, *p++);
3197 /* convert a string of -D options (or digits) into an int.
3198 * sets *s to point to the char after the options */
3202 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3204 static const char * const usage_msgd[] = {
3205 " Debugging flag values: (see also -d)\n"
3206 " p Tokenizing and parsing (with v, displays parse stack)\n"
3207 " s Stack snapshots (with v, displays all stacks)\n"
3208 " l Context (loop) stack processing\n"
3209 " t Trace execution\n"
3210 " o Method and overloading resolution\n",
3211 " c String/numeric conversions\n"
3212 " P Print profiling info, source file input state\n"
3213 " m Memory and SV allocation\n"
3214 " f Format processing\n"
3215 " r Regular expression parsing and execution\n"
3216 " x Syntax tree dump\n",
3217 " u Tainting checks\n"
3218 " H Hash dump -- usurps values()\n"
3219 " X Scratchpad allocation\n"
3221 " S Op slab allocation\n"
3223 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3224 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3225 " v Verbose: use in conjunction with other flags\n"
3226 " C Copy On Write\n"
3227 " A Consistency checks on internal structures\n"
3228 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3229 " M trace smart match resolution\n"
3230 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3231 " L trace some locale setting information--for Perl core development\n",
3232 " i trace PerlIO layer processing\n",
3237 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3240 /* if adding extra options, remember to update DEBUG_MASK */
3241 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3243 for (; isWORDCHAR(**s); (*s)++) {
3244 const char * const d = strchr(debopts,**s);
3246 uv |= 1 << (d - debopts);
3247 else if (ckWARN_d(WARN_DEBUGGING))
3248 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3249 "invalid option -D%c, use -D'' to see choices\n", **s);
3252 else if (isDIGIT(**s)) {
3254 if (grok_atoUV(*s, &uv, &e))
3256 for (; isWORDCHAR(**s); (*s)++) ;
3258 else if (givehelp) {
3259 const char *const *p = usage_msgd;
3260 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3262 return (int)uv; /* ignore any UV->int conversion loss */
3266 /* This routine handles any switches that can be given during run */
3269 Perl_moreswitches(pTHX_ const char *s)
3273 const char option = *s; /* used to remember option in -m/-M code */
3275 PERL_ARGS_ASSERT_MORESWITCHES;
3283 SvREFCNT_dec(PL_rs);
3284 if (s[1] == 'x' && s[2]) {
3285 const char *e = s+=2;
3291 flags = PERL_SCAN_SILENT_ILLDIGIT;
3292 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3293 if (s + numlen < e) {
3294 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3298 PL_rs = newSVpvs("");
3299 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3300 uvchr_to_utf8(tmps, rschar);
3301 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3306 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3307 if (rschar & ~((U8)~0))
3308 PL_rs = &PL_sv_undef;
3309 else if (!rschar && numlen >= 2)
3310 PL_rs = newSVpvs("");
3312 char ch = (char)rschar;
3313 PL_rs = newSVpvn(&ch, 1);
3316 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3321 PL_unicode = parse_unicode_opts( (const char **)&s );
3322 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3330 while (*s && !isSPACE(*s)) ++s;
3331 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3343 forbid_setid('d', FALSE);
3346 /* -dt indicates to the debugger that threads will be used */
3347 if (*s == 't' && !isWORDCHAR(s[1])) {
3349 my_setenv("PERL5DB_THREADED", "1");
3352 /* The following permits -d:Mod to accepts arguments following an =
3353 in the fashion that -MSome::Mod does. */
3354 if (*s == ':' || *s == '=') {
3361 sv = newSVpvs("no Devel::");
3363 sv = newSVpvs("use Devel::");
3367 end = s + strlen(s);
3369 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3370 while(isWORDCHAR(*s) || *s==':') ++s;
3372 sv_catpvn(sv, start, end - start);
3374 sv_catpvn(sv, start, s-start);
3375 /* Don't use NUL as q// delimiter here, this string goes in the
3377 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3380 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3384 PL_perldb = PERLDB_ALL;
3391 forbid_setid('D', FALSE);
3393 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3394 #else /* !DEBUGGING */
3395 if (ckWARN_d(WARN_DEBUGGING))
3396 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3397 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3398 for (s++; isWORDCHAR(*s); s++) ;
3401 NOT_REACHED; /* NOTREACHED */
3405 NOT_REACHED; /* NOTREACHED */
3408 Safefree(PL_inplace);
3410 const char * const start = ++s;
3411 while (*s && !isSPACE(*s))
3414 PL_inplace = savepvn(start, s - start);
3417 case 'I': /* -I handled both here and in parse_body() */
3418 forbid_setid('I', FALSE);
3420 while (*s && isSPACE(*s))
3425 /* ignore trailing spaces (possibly followed by other switches) */
3427 for (e = p; *e && !isSPACE(*e); e++) ;
3431 } while (*p && *p != '-');
3433 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3439 Perl_croak(aTHX_ "No directory specified for -I");
3445 SvREFCNT_dec(PL_ors_sv);
3451 PL_ors_sv = newSVpvs("\n");
3452 numlen = 3 + (*s == '0');
3453 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3457 if (RsPARA(PL_rs)) {
3458 PL_ors_sv = newSVpvs("\n\n");
3461 PL_ors_sv = newSVsv(PL_rs);
3466 forbid_setid('M', FALSE); /* XXX ? */
3469 forbid_setid('m', FALSE); /* XXX ? */
3474 const char *use = "use ";
3476 /* -M-foo == 'no foo' */
3477 /* Leading space on " no " is deliberate, to make both
3478 possibilities the same length. */
3479 if (*s == '-') { use = " no "; ++s; }
3480 sv = newSVpvn(use,4);
3482 /* We allow -M'Module qw(Foo Bar)' */
3483 while(isWORDCHAR(*s) || *s==':') {
3492 Perl_croak(aTHX_ "Module name required with -%c option",
3495 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3496 "contains single ':'",
3497 (int)(s - start), start, option);
3498 end = s + strlen(s);
3500 sv_catpvn(sv, start, end - start);
3501 if (option == 'm') {
3503 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3504 sv_catpvs( sv, " ()");
3507 sv_catpvn(sv, start, s-start);
3508 /* Use NUL as q''-delimiter. */
3509 sv_catpvs(sv, " split(/,/,q\0");
3511 sv_catpvn(sv, s, end - s);
3512 sv_catpvs(sv, "\0)");
3515 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3518 Perl_croak(aTHX_ "Missing argument to -%c", option);
3529 forbid_setid('s', FALSE);
3530 PL_doswitches = TRUE;
3535 #if defined(SILENT_NO_TAINT_SUPPORT)
3536 /* silently ignore */
3537 #elif defined(NO_TAINT_SUPPORT)
3538 Perl_croak_nocontext("This perl was compiled without taint support. "
3539 "Cowardly refusing to run with -t or -T flags");
3547 PL_do_undump = TRUE;
3557 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3558 PL_dowarn |= G_WARN_ON;
3563 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3564 if (!specialWARN(PL_compiling.cop_warnings))
3565 PerlMemShared_free(PL_compiling.cop_warnings);
3566 PL_compiling.cop_warnings = pWARN_ALL ;
3570 PL_dowarn = G_WARN_ALL_OFF;
3571 if (!specialWARN(PL_compiling.cop_warnings))
3572 PerlMemShared_free(PL_compiling.cop_warnings);
3573 PL_compiling.cop_warnings = pWARN_NONE ;
3580 if (s[0] == '-') /* Additional switches on #! line. */
3585 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3591 #ifdef ALTERNATE_SHEBANG
3592 case 'S': /* OS/2 needs -S on "extproc" line. */
3595 case 'e': case 'f': case 'x': case 'E':
3596 #ifndef ALTERNATE_SHEBANG
3600 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3603 "Unrecognized switch: -%.1s (-h will show valid options)",s
3613 PerlIO * PIO_stdout;
3615 const char * const level_str = "v" PERL_VERSION_STRING;
3616 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3617 #ifdef PERL_PATCHNUM
3619 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3620 static const char num [] = PERL_PATCHNUM "*";
3622 static const char num [] = PERL_PATCHNUM;
3625 const STRLEN num_len = sizeof(num)-1;
3626 /* A very advanced compiler would fold away the strnEQ
3627 and this whole conditional, but most (all?) won't do it.
3628 SV level could also be replaced by with preprocessor
3631 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3632 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3633 of the interp so it might contain format characters
3635 level = newSVpvn(num, num_len);
3637 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3641 SV* level = newSVpvn(level_str, level_len);
3642 #endif /* #ifdef PERL_PATCHNUM */
3643 PIO_stdout = PerlIO_stdout();
3644 PerlIO_printf(PIO_stdout,
3645 "\nThis is perl " STRINGIFY(PERL_REVISION)
3646 ", version " STRINGIFY(PERL_VERSION)
3647 ", subversion " STRINGIFY(PERL_SUBVERSION)
3648 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3650 SvREFCNT_dec_NN(level);
3652 #if defined(LOCAL_PATCH_COUNT)
3653 if (LOCAL_PATCH_COUNT > 0)
3654 PerlIO_printf(PIO_stdout,
3655 "\n(with %d registered patch%s, "
3656 "see perl -V for more detail)",
3658 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3661 PerlIO_printf(PIO_stdout,
3662 "\n\nCopyright 1987-2017, Larry Wall\n");
3664 PerlIO_printf(PIO_stdout,
3665 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3668 PerlIO_printf(PIO_stdout,
3669 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3670 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3673 PerlIO_printf(PIO_stdout,
3674 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3675 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3678 PerlIO_printf(PIO_stdout,
3679 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3682 PerlIO_printf(PIO_stdout,
3683 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3686 PerlIO_printf(PIO_stdout,
3687 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3690 PerlIO_printf(PIO_stdout,
3691 "WINCE port by Rainer Keuchel, 2001-2002\n"
3692 "Built on " __DATE__ " " __TIME__ "\n\n");
3695 #ifdef __SYMBIAN32__
3696 PerlIO_printf(PIO_stdout,
3697 "Symbian port by Nokia, 2004-2005\n");
3699 #ifdef BINARY_BUILD_NOTICE
3700 BINARY_BUILD_NOTICE;
3702 PerlIO_printf(PIO_stdout,
3704 Perl may be copied only under the terms of either the Artistic License or the\n\
3705 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3706 Complete documentation for Perl, including FAQ lists, should be found on\n\
3707 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3708 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3712 /* compliments of Tom Christiansen */
3714 /* unexec() can be found in the Gnu emacs distribution */
3715 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3718 #include <lib$routines.h>
3722 Perl_my_unexec(pTHX)
3725 SV * prog = newSVpv(BIN_EXP, 0);
3726 SV * file = newSVpv(PL_origfilename, 0);
3730 sv_catpvs(prog, "/perl");
3731 sv_catpvs(file, ".perldump");
3733 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3734 /* unexec prints msg to stderr in case of failure */
3735 PerlProc_exit(status);
3737 PERL_UNUSED_CONTEXT;
3739 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3740 # elif defined(WIN32) || defined(__CYGWIN__)
3741 Perl_croak_nocontext("dump is not supported");
3743 ABORT(); /* for use with undump */
3748 /* initialize curinterp */
3753 # define PERLVAR(prefix,var,type)
3754 # define PERLVARA(prefix,var,n,type)
3755 # if defined(PERL_IMPLICIT_CONTEXT)
3756 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3757 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3759 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3760 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3762 # include "intrpvar.h"
3768 # define PERLVAR(prefix,var,type)
3769 # define PERLVARA(prefix,var,n,type)
3770 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3771 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3772 # include "intrpvar.h"
3782 S_init_main_stash(pTHX)
3786 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3787 /* We know that the string "main" will be in the global shared string
3788 table, so it's a small saving to use it rather than allocate another
3790 PL_curstname = newSVpvs_share("main");
3791 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3792 /* If we hadn't caused another reference to "main" to be in the shared
3793 string table above, then it would be worth reordering these two,
3794 because otherwise all we do is delete "main" from it as a consequence
3795 of the SvREFCNT_dec, only to add it again with hv_name_set */
3796 SvREFCNT_dec(GvHV(gv));
3797 hv_name_sets(PL_defstash, "main", 0);
3798 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3800 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3802 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3803 GvMULTI_on(PL_incgv);
3804 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3805 SvREFCNT_inc_simple_void(PL_hintgv);
3806 GvMULTI_on(PL_hintgv);
3807 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3808 SvREFCNT_inc_simple_void(PL_defgv);
3809 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3810 SvREFCNT_inc_simple_void(PL_errgv);
3811 GvMULTI_on(PL_errgv);
3812 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3813 SvREFCNT_inc_simple_void(PL_replgv);
3814 GvMULTI_on(PL_replgv);
3815 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3816 #ifdef PERL_DONT_CREATE_GVSV
3817 (void)gv_SVadd(PL_errgv);
3819 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3821 CopSTASH_set(&PL_compiling, PL_defstash);
3822 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3823 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3825 /* We must init $/ before switches are processed. */
3826 sv_setpvs(get_sv("/", GV_ADD), "\n");
3830 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3833 PerlIO *rsfp = NULL;
3837 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3840 PL_origfilename = savepvs("-e");
3845 /* if find_script() returns, it returns a malloc()-ed value */
3846 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3848 if (strBEGINs(scriptname, "/dev/fd/")
3849 && isDIGIT(scriptname[8])
3850 && grok_atoUV(scriptname + 8, &uv, &s)
3851 && uv <= PERL_INT_MAX
3856 * Tell apart "normal" usage of fdscript, e.g.
3857 * with bash on FreeBSD:
3858 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3859 * from usage in suidperl.
3860 * Does any "normal" usage leave garbage after the number???
3861 * Is it a mistake to use a similar /dev/fd/ construct for
3866 * Be supersafe and do some sanity-checks.
3867 * Still, can we be sure we got the right thing?
3870 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3873 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3875 scriptname = savepv(s + 1);
3876 Safefree(PL_origfilename);
3877 PL_origfilename = (char *)scriptname;
3882 CopFILE_free(PL_curcop);
3883 CopFILE_set(PL_curcop, PL_origfilename);
3884 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3885 scriptname = (char *)"";
3886 if (fdscript >= 0) {
3887 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3889 else if (!*scriptname) {
3890 forbid_setid(0, *suidscript);
3894 #ifdef FAKE_BIT_BUCKET
3895 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3896 * is called) and still have the "-e" work. (Believe it or not,
3897 * a /dev/null is required for the "-e" to work because source
3898 * filter magic is used to implement it. ) This is *not* a general
3899 * replacement for a /dev/null. What we do here is create a temp
3900 * file (an empty file), open up that as the script, and then
3901 * immediately close and unlink it. Close enough for jazz. */
3902 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3903 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3904 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3905 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3906 FAKE_BIT_BUCKET_TEMPLATE
3908 const char * const err = "Failed to create a fake bit bucket";
3909 if (strEQ(scriptname, BIT_BUCKET)) {
3910 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3911 int old_umask = umask(0177);
3912 int tmpfd = mkstemp(tmpname);
3915 scriptname = tmpname;
3918 Perl_croak(aTHX_ err);
3922 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3923 #ifdef FAKE_BIT_BUCKET
3924 if ( strBEGINs(scriptname, FAKE_BIT_BUCKET_PREFIX)
3925 && strlen(scriptname) == sizeof(tmpname) - 1)
3929 scriptname = BIT_BUCKET;
3933 /* PSz 16 Sep 03 Keep neat error message */
3935 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
3937 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3938 CopFILE(PL_curcop), Strerror(errno));
3940 fd = PerlIO_fileno(rsfp);
3941 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
3943 /* ensure close-on-exec */
3944 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
3945 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3946 CopFILE(PL_curcop), Strerror(errno));
3952 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
3953 && S_ISDIR(tmpstatbuf.st_mode)))
3954 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3961 /* In the days of suidperl, we refused to execute a setuid script stored on
3962 * a filesystem mounted nosuid and/or noexec. This meant that we probed for the
3963 * existence of the appropriate filesystem-statting function, and behaved
3964 * accordingly. But even though suidperl is long gone, we must still include
3965 * those probes for the benefit of modules like Filesys::Df, which expect the
3966 * results of those probes to be stored in %Config; see RT#126368. So mention
3967 * the relevant cpp symbols here, to ensure that metaconfig will include their
3968 * probes in the generated Configure:
3970 * I_SYSSTATVFS HAS_FSTATVFS
3972 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3973 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3977 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3978 /* Don't even need this function. */
3981 S_validate_suid(pTHX_ PerlIO *rsfp)
3983 const Uid_t my_uid = PerlProc_getuid();
3984 const Uid_t my_euid = PerlProc_geteuid();
3985 const Gid_t my_gid = PerlProc_getgid();
3986 const Gid_t my_egid = PerlProc_getegid();
3988 PERL_ARGS_ASSERT_VALIDATE_SUID;
3990 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3992 int fd = PerlIO_fileno(rsfp);
3994 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
3995 Perl_croak_nocontext( "Illegal suidscript");
3997 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
3999 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
4002 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
4003 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
4004 /* not set-id, must be wrapped */
4007 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4010 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
4015 PERL_ARGS_ASSERT_FIND_BEGINNING;
4017 /* skip forward in input to the real script? */
4020 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
4021 Perl_croak(aTHX_ "No Perl script found in input\n");
4023 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
4024 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
4025 while (*s && !(isSPACE (*s) || *s == '#')) s++;
4027 while (*s == ' ' || *s == '\t') s++;
4029 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
4030 || s2[-1] == '_') s2--;
4031 if (strBEGINs(s2-4,"perl"))
4032 while ((s = moreswitches(s)))
4041 /* no need to do anything here any more if we don't
4043 #ifndef NO_TAINT_SUPPORT
4044 const Uid_t my_uid = PerlProc_getuid();
4045 const Uid_t my_euid = PerlProc_geteuid();
4046 const Gid_t my_gid = PerlProc_getgid();
4047 const Gid_t my_egid = PerlProc_getegid();
4049 PERL_UNUSED_CONTEXT;
4051 /* Should not happen: */
4052 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
4053 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
4057 * Should go by suidscript, not uid!=euid: why disallow
4058 * system("ls") in scripts run from setuid things?
4059 * Or, is this run before we check arguments and set suidscript?
4060 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4061 * (We never have suidscript, can we be sure to have fdscript?)
4062 * Or must then go by UID checks? See comments in forbid_setid also.
4066 /* This is used very early in the lifetime of the program,
4067 * before even the options are parsed, so PL_tainting has
4068 * not been initialized properly. */
4070 Perl_doing_taint(int argc, char *argv[], char *envp[])
4072 #ifndef PERL_IMPLICIT_SYS
4073 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4074 * before we have an interpreter-- and the whole point of this
4075 * function is to be called at such an early stage. If you are on
4076 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4077 * "tainted because running with altered effective ids', you'll
4078 * have to add your own checks somewhere in here. The two most
4079 * known samples of 'implicitness' are Win32 and NetWare, neither
4080 * of which has much of concept of 'uids'. */
4081 Uid_t uid = PerlProc_getuid();
4082 Uid_t euid = PerlProc_geteuid();
4083 Gid_t gid = PerlProc_getgid();
4084 Gid_t egid = PerlProc_getegid();
4091 if (uid && (euid != uid || egid != gid))
4093 #endif /* !PERL_IMPLICIT_SYS */
4094 /* This is a really primitive check; environment gets ignored only
4095 * if -T are the first chars together; otherwise one gets
4096 * "Too late" message. */
4097 if ( argc > 1 && argv[1][0] == '-'
4098 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4103 /* Passing the flag as a single char rather than a string is a slight space
4104 optimisation. The only message that isn't /^-.$/ is
4105 "program input from stdin", which is substituted in place of '\0', which
4106 could never be a command line flag. */
4108 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4110 char string[3] = "-x";
4111 const char *message = "program input from stdin";
4113 PERL_UNUSED_CONTEXT;
4119 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4120 if (PerlProc_getuid() != PerlProc_geteuid())
4121 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4122 if (PerlProc_getgid() != PerlProc_getegid())
4123 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4124 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4126 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4130 Perl_init_dbargs(pTHX)
4132 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4137 /* Someone has already created it.
4138 It might have entries, and if we just turn off AvREAL(), they will
4139 "leak" until global destruction. */
4141 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4142 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4144 AvREIFY_only(PL_dbargs);
4148 Perl_init_debugger(pTHX)
4150 HV * const ostash = PL_curstash;
4153 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4155 Perl_init_dbargs(aTHX);
4156 PL_DBgv = MUTABLE_GV(
4157 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4159 PL_DBline = MUTABLE_GV(
4160 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4162 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4163 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4165 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4166 if (!SvIOK(PL_DBsingle))
4167 sv_setiv(PL_DBsingle, 0);
4168 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4169 mg->mg_private = DBVARMG_SINGLE;
4170 SvSETMAGIC(PL_DBsingle);
4172 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4173 if (!SvIOK(PL_DBtrace))
4174 sv_setiv(PL_DBtrace, 0);
4175 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4176 mg->mg_private = DBVARMG_TRACE;
4177 SvSETMAGIC(PL_DBtrace);
4179 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4180 if (!SvIOK(PL_DBsignal))
4181 sv_setiv(PL_DBsignal, 0);
4182 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4183 mg->mg_private = DBVARMG_SIGNAL;
4184 SvSETMAGIC(PL_DBsignal);
4186 SvREFCNT_dec(PL_curstash);
4187 PL_curstash = ostash;
4190 #ifndef STRESS_REALLOC
4191 #define REASONABLE(size) (size)
4192 #define REASONABLE_but_at_least(size,min) (size)
4194 #define REASONABLE(size) (1) /* unreasonable */
4195 #define REASONABLE_but_at_least(size,min) (min)
4199 Perl_init_stacks(pTHX)
4203 /* start with 128-item stack and 8K cxstack */
4204 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4205 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4206 PL_curstackinfo->si_type = PERLSI_MAIN;
4207 #if defined DEBUGGING && !defined DEBUGGING_RE_ONLY
4208 PL_curstackinfo->si_stack_hwm = 0;
4210 PL_curstack = PL_curstackinfo->si_stack;
4211 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4213 PL_stack_base = AvARRAY(PL_curstack);
4214 PL_stack_sp = PL_stack_base;
4215 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4217 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4220 PL_tmps_max = REASONABLE(128);
4222 Newx(PL_markstack,REASONABLE(32),I32);
4223 PL_markstack_ptr = PL_markstack;
4224 PL_markstack_max = PL_markstack + REASONABLE(32);
4228 Newx(PL_scopestack,REASONABLE(32),I32);
4230 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4232 PL_scopestack_ix = 0;
4233 PL_scopestack_max = REASONABLE(32);
4235 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4236 Newx(PL_savestack, size, ANY);
4237 PL_savestack_ix = 0;
4238 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4239 PL_savestack_max = size - SS_MAXPUSH;
4247 while (PL_curstackinfo->si_next)
4248 PL_curstackinfo = PL_curstackinfo->si_next;
4249 while (PL_curstackinfo) {
4250 PERL_SI *p = PL_curstackinfo->si_prev;
4251 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4252 Safefree(PL_curstackinfo->si_cxstack);
4253 Safefree(PL_curstackinfo);
4254 PL_curstackinfo = p;
4256 Safefree(PL_tmps_stack);
4257 Safefree(PL_markstack);
4258 Safefree(PL_scopestack);
4260 Safefree(PL_scopestack_name);
4262 Safefree(PL_savestack);
4266 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4268 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4269 AV *const isa = GvAVn(gv);
4272 PERL_ARGS_ASSERT_POPULATE_ISA;
4274 if(AvFILLp(isa) != -1)
4277 /* NOTE: No support for tied ISA */
4279 va_start(args, len);
4281 const char *const parent = va_arg(args, const char*);
4286 parent_len = va_arg(args, size_t);
4288 /* Arguments are supplied with a trailing :: */
4289 assert(parent_len > 2);
4290 assert(parent[parent_len - 1] == ':');
4291 assert(parent[parent_len - 2] == ':');
4292 av_push(isa, newSVpvn(parent, parent_len - 2));
4293 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4300 S_init_predump_symbols(pTHX)
4305 sv_setpvs(get_sv("\"", GV_ADD), " ");
4306 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4309 /* Historically, PVIOs were blessed into IO::Handle, unless
4310 FileHandle was loaded, in which case they were blessed into
4311 that. Action at a distance.
4312 However, if we simply bless into IO::Handle, we break code
4313 that assumes that PVIOs will have (among others) a seek
4314 method. IO::File inherits from IO::Handle and IO::Seekable,
4315 and provides the needed methods. But if we simply bless into
4316 it, then we break code that assumed that by loading
4317 IO::Handle, *it* would work.
4318 So a compromise is to set up the correct @IO::File::ISA,
4319 so that code that does C<use IO::Handle>; will still work.
4322 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4323 STR_WITH_LEN("IO::Handle::"),
4324 STR_WITH_LEN("IO::Seekable::"),
4325 STR_WITH_LEN("Exporter::"),
4328 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4329 GvMULTI_on(PL_stdingv);
4330 io = GvIOp(PL_stdingv);
4331 IoTYPE(io) = IoTYPE_RDONLY;
4332 IoIFP(io) = PerlIO_stdin();
4333 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4335 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4337 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4340 IoTYPE(io) = IoTYPE_WRONLY;
4341 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4343 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4345 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4347 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4348 GvMULTI_on(PL_stderrgv);
4349 io = GvIOp(PL_stderrgv);
4350 IoTYPE(io) = IoTYPE_WRONLY;
4351 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4352 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4354 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4356 PL_statname = newSVpvs(""); /* last filename we did stat on */
4360 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4362 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4364 argc--,argv++; /* skip name of script */
4365 if (PL_doswitches) {
4366 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4370 if (argv[0][1] == '-' && !argv[0][2]) {
4374 if ((s = strchr(argv[0], '='))) {
4375 const char *const start_name = argv[0] + 1;
4376 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4377 TRUE, SVt_PV)), s + 1);
4380 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4383 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4384 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4385 GvMULTI_on(PL_argvgv);
4386 av_clear(GvAVn(PL_argvgv));
4387 for (; argc > 0; argc--,argv++) {
4388 SV * const sv = newSVpv(argv[0],0);
4389 av_push(GvAV(PL_argvgv),sv);
4390 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4391 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4394 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4395 (void)sv_utf8_decode(sv);
4399 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4400 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4401 "-i used with no filenames on the command line, "
4402 "reading from STDIN");
4406 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4413 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4415 PL_toptarget = newSV_type(SVt_PVIV);
4416 SvPVCLEAR(PL_toptarget);
4417 PL_bodytarget = newSV_type(SVt_PVIV);
4418 SvPVCLEAR(PL_bodytarget);
4419 PL_formtarget = PL_bodytarget;
4423 init_argv_symbols(argc,argv);
4425 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4426 sv_setpv(GvSV(tmpgv),PL_origfilename);
4428 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4430 bool env_is_not_environ;
4431 SvREFCNT_inc_simple_void_NN(PL_envgv);
4432 GvMULTI_on(PL_envgv);
4433 hv = GvHVn(PL_envgv);
4434 hv_magic(hv, NULL, PERL_MAGIC_env);
4436 #ifdef USE_ENVIRON_ARRAY
4437 /* Note that if the supplied env parameter is actually a copy
4438 of the global environ then it may now point to free'd memory
4439 if the environment has been modified since. To avoid this
4440 problem we treat env==NULL as meaning 'use the default'
4444 env_is_not_environ = env != environ;
4445 if (env_is_not_environ
4446 # ifdef USE_ITHREADS
4447 && PL_curinterp == aTHX
4459 for (; *env; env++) {
4462 if (!(s = strchr(old_var,'=')) || s == old_var)
4466 #if defined(MSDOS) && !defined(DJGPP)
4468 (void)strupr(old_var);
4471 if (hv_exists(hv, old_var, nlen)) {
4472 const char *name = savepvn(old_var, nlen);
4474 /* make sure we use the same value as getenv(), otherwise code that
4475 uses getenv() (like setlocale()) might see a different value to %ENV
4477 sv = newSVpv(PerlEnv_getenv(name), 0);
4479 /* keep a count of the dups of this name so we can de-dup environ later */
4480 if (hv_exists(dups, name, nlen))
4481 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4483 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4488 sv = newSVpv(s+1, 0);
4490 (void)hv_store(hv, old_var, nlen, sv, 0);
4491 if (env_is_not_environ)
4495 /* environ has some duplicate definitions, remove them */
4498 while ((entry = hv_iternext_flags(dups, 0))) {
4500 const char *name = HePV(entry, nlen);
4501 IV count = SvIV(HeVAL(entry));
4503 SV **valp = hv_fetch(hv, name, nlen, 0);
4507 /* try to remove any duplicate names, depending on the
4508 * implementation used in my_setenv() the iteration might
4509 * not be necessary, but let's be safe.
4511 for (i = 0; i < count; ++i)
4514 /* and set it back to the value we set $ENV{name} to */
4515 my_setenv(name, SvPV_nolen(*valp));
4518 SvREFCNT_dec_NN(dups);
4520 #endif /* USE_ENVIRON_ARRAY */
4521 #endif /* !PERL_MICRO */
4525 /* touch @F array to prevent spurious warnings 20020415 MJD */
4527 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4532 S_init_perllib(pTHX)
4535 const char *perl5lib = NULL;
4538 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4542 if (!TAINTING_get) {
4544 perl5lib = PerlEnv_getenv("PERL5LIB");
4546 * It isn't possible to delete an environment variable with
4547 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4548 * case we treat PERL5LIB as undefined if it has a zero-length value.
4550 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4551 if (perl5lib && *perl5lib != '\0')
4555 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4557 s = PerlEnv_getenv("PERLLIB");
4559 incpush_use_sep(s, 0, 0);
4562 /* Treat PERL5?LIB as a possible search list logical name -- the
4563 * "natural" VMS idiom for a Unix path string. We allow each
4564 * element to be a set of |-separated directories for compatibility.
4568 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4570 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4571 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4573 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4574 incpush_use_sep(buf, 0, 0);
4579 #ifndef PERL_IS_MINIPERL
4580 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4581 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4583 /* Use the ~-expanded versions of APPLLIB (undocumented),
4584 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4587 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4588 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4592 /* sitearch is always relative to sitelib on Windows for
4593 * DLL-based path intuition to work correctly */
4594 # if !defined(WIN32)
4595 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4596 INCPUSH_CAN_RELOCATE);
4602 /* this picks up sitearch as well */
4603 s = PerlEnv_sitelib_path(PERL_FS_VERSION, &len);
4605 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4607 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4611 #ifdef PERL_VENDORARCH_EXP
4612 /* vendorarch is always relative to vendorlib on Windows for
4613 * DLL-based path intuition to work correctly */
4614 # if !defined(WIN32)
4615 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4616 INCPUSH_CAN_RELOCATE);
4620 #ifdef PERL_VENDORLIB_EXP
4622 /* this picks up vendorarch as well */
4623 s = PerlEnv_vendorlib_path(PERL_FS_VERSION, &len);
4625 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4627 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4628 INCPUSH_CAN_RELOCATE);
4633 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4637 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4641 s = PerlEnv_lib_path(PERL_FS_VERSION, &len);
4643 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4644 #elif defined(NETWARE)
4645 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4647 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4650 #ifdef PERL_OTHERLIBDIRS
4651 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4652 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4653 |INCPUSH_CAN_RELOCATE);
4656 if (!TAINTING_get) {
4659 * It isn't possible to delete an environment variable with
4660 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4661 * case we treat PERL5LIB as undefined if it has a zero-length value.
4663 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4664 if (perl5lib && *perl5lib != '\0')
4668 incpush_use_sep(perl5lib, 0,
4669 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4671 /* Treat PERL5?LIB as a possible search list logical name -- the
4672 * "natural" VMS idiom for a Unix path string. We allow each
4673 * element to be a set of |-separated directories for compatibility.
4677 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4679 incpush_use_sep(buf, 0,
4680 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4681 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4685 /* Use the ~-expanded versions of APPLLIB (undocumented),
4686 SITELIB and VENDORLIB for older versions
4689 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4690 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4693 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4694 /* Search for version-specific dirs below here */
4695 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4696 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4700 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4701 /* Search for version-specific dirs below here */
4702 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4703 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4706 #ifdef PERL_OTHERLIBDIRS
4707 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4708 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4709 |INCPUSH_CAN_RELOCATE);
4711 #endif /* !PERL_IS_MINIPERL */
4713 if (!TAINTING_get) {
4714 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4715 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4716 if (unsafe && strEQ(unsafe, "1"))
4718 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4722 #if defined(DOSISH) || defined(__SYMBIAN32__)
4723 # define PERLLIB_SEP ';'
4724 #elif defined(__VMS)
4725 # define PERLLIB_SEP PL_perllib_sep
4727 # define PERLLIB_SEP ':'
4729 #ifndef PERLLIB_MANGLE
4730 # define PERLLIB_MANGLE(s,n) (s)
4733 #ifndef PERL_IS_MINIPERL
4734 /* Push a directory onto @INC if it exists.
4735 Generate a new SV if we do this, to save needing to copy the SV we push
4738 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4742 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4744 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4745 S_ISDIR(tmpstatbuf.st_mode)) {
4747 dir = newSVsv(stem);
4749 /* Truncate dir back to stem. */
4750 SvCUR_set(dir, SvCUR(stem));
4757 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4759 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4762 PERL_ARGS_ASSERT_MAYBERELOCATE;
4765 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4766 defined to so something (in os2/os2.c), but the code has been
4767 this way, ignoring any possible changed of length, since
4768 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4770 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4776 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4778 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4779 sv_usepvn(libdir,unix,len);
4782 PerlIO_printf(Perl_error_log,
4783 "Failed to unixify @INC element \"%s\"\n",
4784 SvPV_nolen_const(libdir));
4788 /* Do the if() outside the #ifdef to avoid warnings about an unused
4791 #ifdef PERL_RELOCATABLE_INC
4793 * Relocatable include entries are marked with a leading .../
4796 * 0: Remove that leading ".../"
4797 * 1: Remove trailing executable name (anything after the last '/')
4798 * from the perl path to give a perl prefix
4800 * While the @INC element starts "../" and the prefix ends with a real
4801 * directory (ie not . or ..) chop that real directory off the prefix
4802 * and the leading "../" from the @INC element. ie a logical "../"
4804 * Finally concatenate the prefix and the remainder of the @INC element
4805 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4806 * generates /usr/local/lib/perl5
4808 const char *libpath = SvPVX(libdir);
4809 STRLEN libpath_len = SvCUR(libdir);
4810 if (memBEGINs(libpath, libpath_len, ".../")) {
4812 SV * const caret_X = get_sv("\030", 0);
4813 /* Going to use the SV just as a scratch buffer holding a C
4819 /* $^X is *the* source of taint if tainting is on, hence
4820 SvPOK() won't be true. */
4822 assert(SvPOKp(caret_X));
4823 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4825 /* Firstly take off the leading .../
4826 If all else fail we'll do the paths relative to the current
4828 sv_chop(libdir, libpath + 4);
4829 /* Don't use SvPV as we're intentionally bypassing taining,
4830 mortal copies that the mg_get of tainting creates, and
4831 corruption that seems to come via the save stack.
4832 I guess that the save stack isn't correctly set up yet. */
4833 libpath = SvPVX(libdir);
4834 libpath_len = SvCUR(libdir);
4836 prefix = SvPVX(prefix_sv);
4837 lastslash = (char *) my_memrchr(prefix, '/',
4838 SvEND(prefix_sv) - prefix);
4840 /* First time in with the *lastslash = '\0' we just wipe off
4841 the trailing /perl from (say) /usr/foo/bin/perl
4845 while ((*lastslash = '\0'), /* Do that, come what may. */
4846 ( memBEGINs(libpath, libpath_len, "../")
4848 (char *) my_memrchr(prefix, '/',
4849 SvEND(prefix_sv) - prefix))))
4851 if (lastslash[1] == '\0'
4852 || (lastslash[1] == '.'
4853 && (lastslash[2] == '/' /* ends "/." */
4854 || (lastslash[2] == '/'
4855 && lastslash[3] == '/' /* or "/.." */
4857 /* Prefix ends "/" or "/." or "/..", any of which
4858 are fishy, so don't do any more logical cleanup.
4862 /* Remove leading "../" from path */
4865 /* Next iteration round the loop removes the last
4866 directory name from prefix by writing a '\0' in
4867 the while clause. */
4869 /* prefix has been terminated with a '\0' to the correct
4870 length. libpath points somewhere into the libdir SV.
4871 We need to join the 2 with '/' and drop the result into
4873 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4874 SvREFCNT_dec(libdir);
4875 /* And this is the new libdir. */
4878 (PerlProc_getuid() != PerlProc_geteuid() ||
4879 PerlProc_getgid() != PerlProc_getegid())) {
4880 /* Need to taint relocated paths if running set ID */
4881 SvTAINTED_on(libdir);
4884 SvREFCNT_dec(prefix_sv);
4892 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4894 #ifndef PERL_IS_MINIPERL
4895 const U8 using_sub_dirs
4896 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4897 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4898 const U8 add_versioned_sub_dirs
4899 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4900 const U8 add_archonly_sub_dirs
4901 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4902 #ifdef PERL_INC_VERSION_LIST
4903 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4906 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4907 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4908 AV *const inc = GvAVn(PL_incgv);
4910 PERL_ARGS_ASSERT_INCPUSH;
4913 /* Could remove this vestigial extra block, if we don't mind a lot of
4914 re-indenting diff noise. */
4916 SV *const libdir = mayberelocate(dir, len, flags);
4917 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4918 arranged to unshift #! line -I onto the front of @INC. However,
4919 -I can add version and architecture specific libraries, and they
4920 need to go first. The old code assumed that it was always
4921 pushing. Hence to make it work, need to push the architecture
4922 (etc) libraries onto a temporary array, then "unshift" that onto
4923 the front of @INC. */
4924 #ifndef PERL_IS_MINIPERL
4925 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4928 * BEFORE pushing libdir onto @INC we may first push version- and
4929 * archname-specific sub-directories.
4931 if (using_sub_dirs) {
4932 SV *subdir = newSVsv(libdir);
4933 #ifdef PERL_INC_VERSION_LIST
4934 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4935 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4936 const char * const *incver;
4939 if (add_versioned_sub_dirs) {
4940 /* .../version/archname if -d .../version/archname */
4941 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4942 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4944 /* .../version if -d .../version */
4945 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4946 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4949 #ifdef PERL_INC_VERSION_LIST
4951 for (incver = incverlist; *incver; incver++) {
4952 /* .../xxx if -d .../xxx */
4953 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4954 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4959 if (add_archonly_sub_dirs) {
4960 /* .../archname if -d .../archname */
4961 sv_catpvs(subdir, "/" ARCHNAME);
4962 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4966 assert (SvREFCNT(subdir) == 1);
4967 SvREFCNT_dec(subdir);
4969 #endif /* !PERL_IS_MINIPERL */
4970 /* finally add this lib directory at the end of @INC */
4972 #ifdef PERL_IS_MINIPERL
4973 const Size_t extra = 0;
4975 Size_t extra = av_tindex(av) + 1;
4977 av_unshift(inc, extra + push_basedir);
4979 av_store(inc, extra, libdir);
4980 #ifndef PERL_IS_MINIPERL
4982 /* av owns a reference, av_store() expects to be donated a
4983 reference, and av expects to be sane when it's cleared.
4984 If I wanted to be naughty and wrong, I could peek inside the
4985 implementation of av_clear(), realise that it uses
4986 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4987 and so directly steal from it (with a memcpy() to inc, and
4988 then memset() to NULL them out. But people copy code from the
4989 core expecting it to be best practise, so let's use the API.
4990 Although studious readers will note that I'm not checking any
4992 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4997 else if (push_basedir) {
4998 av_push(inc, libdir);
5001 if (!push_basedir) {
5002 assert (SvREFCNT(libdir) == 1);
5003 SvREFCNT_dec(libdir);
5009 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
5013 /* This logic has been broken out from S_incpush(). It may be possible to
5016 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
5018 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
5019 * argument to incpush_use_sep. This allows creation of relocatable
5020 * Perl distributions that patch the binary at install time. Those
5021 * distributions will have to provide their own relocation tools; this
5022 * is not a feature otherwise supported by core Perl.
5024 #ifndef PERL_RELOCATABLE_INCPUSH
5031 /* Break at all separators */
5032 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
5034 /* skip any consecutive separators */
5036 /* Uncomment the next line for PATH semantics */
5037 /* But you'll need to write tests */
5038 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
5040 incpush(p, (STRLEN)(s - p), flags);
5045 incpush(p, (STRLEN)(end - p), flags);
5050 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
5053 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
5059 PERL_ARGS_ASSERT_CALL_LIST;
5061 while (av_tindex(paramList) >= 0) {
5062 cv = MUTABLE_CV(av_shift(paramList));
5064 if (paramList == PL_beginav) {
5065 /* save PL_beginav for compiler */
5066 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5068 else if (paramList == PL_checkav) {
5069 /* save PL_checkav for compiler */
5070 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5072 else if (paramList == PL_unitcheckav) {
5073 /* save PL_unitcheckav for compiler */
5074 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5084 (void)SvPV_const(atsv, len);
5086 PL_curcop = &PL_compiling;
5087 CopLINE_set(PL_curcop, oldline);
5088 if (paramList == PL_beginav)
5089 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5091 Perl_sv_catpvf(aTHX_ atsv,
5092 "%s failed--call queue aborted",
5093 paramList == PL_checkav ? "CHECK"
5094 : paramList == PL_initav ? "INIT"
5095 : paramList == PL_unitcheckav ? "UNITCHECK"
5097 while (PL_scopestack_ix > oldscope)
5100 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5107 /* my_exit() was called */
5108 while (PL_scopestack_ix > oldscope)
5111 SET_CURSTASH(PL_defstash);
5112 PL_curcop = &PL_compiling;
5113 CopLINE_set(PL_curcop, oldline);
5116 NOT_REACHED; /* NOTREACHED */
5119 PL_curcop = &PL_compiling;
5120 CopLINE_set(PL_curcop, oldline);
5123 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5132 Perl_my_exit(pTHX_ U32 status)
5134 if (PL_exit_flags & PERL_EXIT_ABORT) {
5137 if (PL_exit_flags & PERL_EXIT_WARN) {
5138 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5139 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5140 PL_exit_flags &= ~PERL_EXIT_ABORT;
5150 STATUS_EXIT_SET(status);
5157 Perl_my_failure_exit(pTHX)
5160 /* We have been called to fall on our sword. The desired exit code
5161 * should be already set in STATUS_UNIX, but could be shifted over
5162 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5165 * If an error code has not been set, then force the issue.
5167 if (MY_POSIX_EXIT) {
5169 /* According to the die_exit.t tests, if errno is non-zero */
5170 /* It should be used for the error status. */
5172 if (errno == EVMSERR) {
5173 STATUS_NATIVE = vaxc$errno;
5176 /* According to die_exit.t tests, if the child_exit code is */
5177 /* also zero, then we need to exit with a code of 255 */
5178 if ((errno != 0) && (errno < 256))
5179 STATUS_UNIX_EXIT_SET(errno);
5180 else if (STATUS_UNIX < 255) {
5181 STATUS_UNIX_EXIT_SET(255);
5186 /* The exit code could have been set by $? or vmsish which
5187 * means that it may not have fatal set. So convert
5188 * success/warning codes to fatal with out changing
5189 * the POSIX status code. The severity makes VMS native
5190 * status handling work, while UNIX mode programs use the
5191 * the POSIX exit codes.
5193 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5194 STATUS_NATIVE &= STS$M_COND_ID;
5195 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5199 /* Traditionally Perl on VMS always expects a Fatal Error. */
5200 if (vaxc$errno & 1) {
5202 /* So force success status to failure */
5203 if (STATUS_NATIVE & 1)
5208 STATUS_UNIX = EINTR; /* In case something cares */
5213 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5215 /* Encode the severity code */
5216 severity = STATUS_NATIVE & STS$M_SEVERITY;
5217 STATUS_UNIX = (severity ? severity : 1) << 8;
5219 /* Perl expects this to be a fatal error */
5220 if (severity != STS$K_SEVERE)
5229 STATUS_UNIX_SET(errno);
5231 exitstatus = STATUS_UNIX >> 8;
5232 if (exitstatus & 255)
5233 STATUS_UNIX_SET(exitstatus);
5235 STATUS_UNIX_SET(255);
5238 if (PL_exit_flags & PERL_EXIT_ABORT) {
5241 if (PL_exit_flags & PERL_EXIT_WARN) {
5242 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5243 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5244 PL_exit_flags &= ~PERL_EXIT_ABORT;
5250 S_my_exit_jump(pTHX)
5253 SvREFCNT_dec(PL_e_script);
5257 POPSTACK_TO(PL_mainstack);
5258 if (cxstack_ix >= 0) {
5260 cx_popblock(cxstack);
5268 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5270 const char * const p = SvPVX_const(PL_e_script);
5271 const char *nl = strchr(p, '\n');
5273 PERL_UNUSED_ARG(idx);
5274 PERL_UNUSED_ARG(maxlen);
5276 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5278 filter_del(read_e_script);
5281 sv_catpvn(buf_sv, p, nl-p);
5282 sv_chop(PL_e_script, nl);
5286 /* removes boilerplate code at the end of each boot_Module xsub */
5288 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5291 call_list(PL_scopestack_ix, PL_unitcheckav);
5296 * ex: set ts=8 sts=4 sw=4 et: