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 * 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
27 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
28 # define USE_SITECUSTOMIZE
32 #define PERL_IN_PERL_C
34 #include "patchlevel.h" /* for local_patches */
41 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
48 char control[CMSG_SPACE(sizeof(int))];
61 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
62 char *getenv (char *); /* Usually in <stdlib.h> */
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);
96 MUTEX_INIT(&PL_dollarzero_mutex);
97 MUTEX_INIT(&PL_my_ctx_mutex);
100 #if defined(USE_ITHREADS)
103 /* This always happens for non-ithreads */
106 PERL_SET_THX(my_perl);
111 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
114 Perl_sys_init(int* argc, char*** argv)
118 PERL_ARGS_ASSERT_SYS_INIT;
120 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
121 PERL_UNUSED_ARG(argv);
122 PERL_SYS_INIT_BODY(argc, argv);
126 Perl_sys_init3(int* argc, char*** argv, char*** env)
130 PERL_ARGS_ASSERT_SYS_INIT3;
132 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
133 PERL_UNUSED_ARG(argv);
134 PERL_UNUSED_ARG(env);
135 PERL_SYS_INIT3_BODY(argc, argv, env);
142 if (!PL_veto_cleanup) {
143 PERL_SYS_TERM_BODY();
148 #ifdef PERL_IMPLICIT_SYS
150 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
151 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
152 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
153 struct IPerlDir* ipD, struct IPerlSock* ipS,
154 struct IPerlProc* ipP)
156 PerlInterpreter *my_perl;
158 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
160 /* Newx() needs interpreter, so call malloc() instead */
161 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
162 S_init_tls_and_interp(my_perl);
163 Zero(my_perl, 1, PerlInterpreter);
173 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
180 =head1 Embedding Functions
182 =for apidoc perl_alloc
184 Allocates a new Perl interpreter. See L<perlembed>.
192 PerlInterpreter *my_perl;
194 /* Newx() needs interpreter, so call malloc() instead */
195 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
197 S_init_tls_and_interp(my_perl);
198 #ifndef PERL_TRACK_MEMPOOL
199 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
201 Zero(my_perl, 1, PerlInterpreter);
202 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
206 #endif /* PERL_IMPLICIT_SYS */
209 =for apidoc perl_construct
211 Initializes a new Perl interpreter. See L<perlembed>.
217 perl_construct(pTHXx)
221 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
225 PL_perl_destruct_level = 1;
227 PERL_UNUSED_ARG(my_perl);
228 if (PL_perl_destruct_level > 0)
231 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
233 #ifdef PERL_TRACE_OPS
234 Zero(PL_op_exec_cnt, OP_max+2, UV);
239 SvREADONLY_on(&PL_sv_placeholder);
240 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
242 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
243 #ifdef PERL_USES_PL_PIDSTATUS
244 PL_pidstatus = newHV();
247 PL_rs = newSVpvs("\n");
257 SET_NUMERIC_STANDARD();
259 #if defined(LOCAL_PATCH_COUNT)
260 PL_localpatches = local_patches; /* For possible -v */
263 #ifdef HAVE_INTERP_INTERN
267 PerlIO_init(aTHX); /* Hook to IO system */
269 PL_fdpid = newAV(); /* for remembering popen pids by fd */
270 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
271 PL_errors = newSVpvs("");
272 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
273 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
274 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
276 /* First entry is a list of empty elements. It needs to be initialised
277 else all hell breaks loose in S_find_uninit_var(). */
278 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
279 PL_regex_pad = AvARRAY(PL_regex_padav);
280 Newxz(PL_stashpad, PL_stashpadmax, HV *);
282 #ifdef USE_REENTRANT_API
283 Perl_reentrant_init(aTHX);
285 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
286 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
287 * This MUST be done before any hash stores or fetches take place.
288 * If you set PL_hash_seed (and presumably also PL_hash_seed_set)
289 * yourself, it is your responsibility to provide a good random seed!
290 * You can also define PERL_HASH_SEED in compile time, see hv.h.
292 * XXX: fix this comment */
293 if (PL_hash_seed_set == FALSE) {
294 Perl_get_hash_seed(aTHX_ PL_hash_seed);
295 PL_hash_seed_set= TRUE;
297 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
299 /* Note that strtab is a rather special HV. Assumptions are made
300 about not iterating on it, and not adding tie magic to it.
301 It is properly deallocated in perl_destruct() */
304 HvSHAREKEYS_off(PL_strtab); /* mandatory */
305 hv_ksplit(PL_strtab, 512);
307 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
309 #if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
310 _dyld_lookup_and_bind
311 ("__environ", (unsigned long *) &environ_pointer, NULL);
315 # ifdef USE_ENVIRON_ARRAY
316 PL_origenviron = environ;
320 /* Use sysconf(_SC_CLK_TCK) if available, if not
321 * available or if the sysconf() fails, use the HZ.
322 * The HZ if not originally defined has been by now
323 * been defined as CLK_TCK, if available. */
324 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
325 PL_clocktick = sysconf(_SC_CLK_TCK);
326 if (PL_clocktick <= 0)
330 PL_stashcache = newHV();
332 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
333 PL_apiversion = newSVpvs("v" PERL_API_VERSION_STRING);
336 if (!PL_mmap_page_size) {
337 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
339 SETERRNO(0, SS_NORMAL);
341 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
343 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
345 if ((long) PL_mmap_page_size < 0) {
347 SV * const error = ERRSV;
348 SvUPGRADE(error, SVt_PV);
349 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
352 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
356 # ifdef HAS_GETPAGESIZE
357 PL_mmap_page_size = getpagesize();
359 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
360 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
364 if (PL_mmap_page_size <= 0)
365 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
366 (IV) PL_mmap_page_size);
368 #endif /* HAS_MMAP */
370 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
371 PL_timesbase.tms_utime = 0;
372 PL_timesbase.tms_stime = 0;
373 PL_timesbase.tms_cutime = 0;
374 PL_timesbase.tms_cstime = 0;
377 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
379 PL_registered_mros = newHV();
380 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
381 HvMAX(PL_registered_mros) = 0;
387 =for apidoc nothreadhook
389 Stub that provides thread hook for perl_destruct when there are
396 Perl_nothreadhook(pTHX)
402 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
404 Perl_dump_sv_child(pTHX_ SV *sv)
407 const int sock = PL_dumper_fd;
408 const int debug_fd = PerlIO_fileno(Perl_debug_log);
409 union control_un control;
412 struct cmsghdr *cmptr;
414 unsigned char buffer[256];
416 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
418 if(sock == -1 || debug_fd == -1)
421 PerlIO_flush(Perl_debug_log);
423 /* All these shenanigans are to pass a file descriptor over to our child for
424 it to dump out to. We can't let it hold open the file descriptor when it
425 forks, as the file descriptor it will dump to can turn out to be one end
426 of pipe that some other process will wait on for EOF. (So as it would
427 be open, the wait would be forever.) */
429 msg.msg_control = control.control;
430 msg.msg_controllen = sizeof(control.control);
431 /* We're a connected socket so we don't need a destination */
437 cmptr = CMSG_FIRSTHDR(&msg);
438 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
439 cmptr->cmsg_level = SOL_SOCKET;
440 cmptr->cmsg_type = SCM_RIGHTS;
441 *((int *)CMSG_DATA(cmptr)) = 1;
443 vec[0].iov_base = (void*)&sv;
444 vec[0].iov_len = sizeof(sv);
445 got = sendmsg(sock, &msg, 0);
448 perror("Debug leaking scalars parent sendmsg failed");
451 if(got < sizeof(sv)) {
452 perror("Debug leaking scalars parent short sendmsg");
456 /* Return protocol is
458 unsigned char: length of location string (0 for empty)
459 unsigned char*: string (not terminated)
461 vec[0].iov_base = (void*)&returned_errno;
462 vec[0].iov_len = sizeof(returned_errno);
463 vec[1].iov_base = buffer;
466 got = readv(sock, vec, 2);
469 perror("Debug leaking scalars parent read failed");
470 PerlIO_flush(PerlIO_stderr());
473 if(got < sizeof(returned_errno) + 1) {
474 perror("Debug leaking scalars parent short read");
475 PerlIO_flush(PerlIO_stderr());
480 got = read(sock, buffer + 1, *buffer);
482 perror("Debug leaking scalars parent read 2 failed");
483 PerlIO_flush(PerlIO_stderr());
488 perror("Debug leaking scalars parent short read 2");
489 PerlIO_flush(PerlIO_stderr());
494 if (returned_errno || *buffer) {
495 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
496 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
497 returned_errno, Strerror(returned_errno));
503 =for apidoc perl_destruct
505 Shuts down a Perl interpreter. See L<perlembed>.
514 VOL signed char destruct_level; /* see possible values in intrpvar.h */
516 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
521 PERL_ARGS_ASSERT_PERL_DESTRUCT;
523 PERL_UNUSED_ARG(my_perl);
526 assert(PL_scopestack_ix == 1);
528 /* wait for all pseudo-forked children to finish */
529 PERL_WAIT_FOR_CHILDREN;
531 destruct_level = PL_perl_destruct_level;
532 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
534 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
536 const int i = atoi(s);
538 if (destruct_level < i) destruct_level = i;
540 #ifdef PERL_TRACK_MEMPOOL
541 /* RT #114496, for perl_free */
542 PL_perl_destruct_level = i;
548 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
554 if (PL_endav && !PL_minus_c) {
555 PERL_SET_PHASE(PERL_PHASE_END);
556 call_list(PL_scopestack_ix, PL_endav);
562 assert(PL_scopestack_ix == 0);
564 /* Need to flush since END blocks can produce output */
567 #ifdef PERL_TRACE_OPS
568 /* If we traced all Perl OP usage, report and clean up */
569 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
570 for (i = 0; i <= OP_max; ++i) {
571 PerlIO_printf(Perl_debug_log, " %s: %"UVuf"\n", PL_op_name[i], PL_op_exec_cnt[i]);
572 PL_op_exec_cnt[i] = 0;
574 /* Utility slot for easily doing little tracing experiments in the runloop: */
575 if (PL_op_exec_cnt[OP_max+1] != 0)
576 PerlIO_printf(Perl_debug_log, " SPECIAL: %"UVuf"\n", PL_op_exec_cnt[OP_max+1]);
577 PerlIO_printf(Perl_debug_log, "\n");
581 if (PL_threadhook(aTHX)) {
582 /* Threads hook has vetoed further cleanup */
583 PL_veto_cleanup = TRUE;
587 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
588 if (destruct_level != 0) {
589 /* Fork here to create a child. Our child's job is to preserve the
590 state of scalars prior to destruction, so that we can instruct it
591 to dump any scalars that we later find have leaked.
592 There's no subtlety in this code - it assumes POSIX, and it doesn't
596 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
597 perror("Debug leaking scalars socketpair failed");
603 perror("Debug leaking scalars fork failed");
607 /* We are the child */
608 const int sock = fd[1];
609 const int debug_fd = PerlIO_fileno(Perl_debug_log);
612 /* Our success message is an integer 0, and a char 0 */
613 static const char success[sizeof(int) + 1] = {0};
617 /* We need to close all other file descriptors otherwise we end up
618 with interesting hangs, where the parent closes its end of a
619 pipe, and sits waiting for (another) child to terminate. Only
620 that child never terminates, because it never gets EOF, because
621 we also have the far end of the pipe open. We even need to
622 close the debugging fd, because sometimes it happens to be one
623 end of a pipe, and a process is waiting on the other end for
624 EOF. Normally it would be closed at some point earlier in
625 destruction, but if we happen to cause the pipe to remain open,
626 EOF never occurs, and we get an infinite hang. Hence all the
627 games to pass in a file descriptor if it's actually needed. */
629 f = sysconf(_SC_OPEN_MAX);
631 where = "sysconf failed";
642 union control_un control;
645 struct cmsghdr *cmptr;
649 msg.msg_control = control.control;
650 msg.msg_controllen = sizeof(control.control);
651 /* We're a connected socket so we don't need a source */
655 msg.msg_iovlen = sizeof(vec)/sizeof(vec[0]);
657 vec[0].iov_base = (void*)⌖
658 vec[0].iov_len = sizeof(target);
660 got = recvmsg(sock, &msg, 0);
665 where = "recv failed";
668 if(got < sizeof(target)) {
669 where = "short recv";
673 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
677 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
678 where = "wrong cmsg_len";
681 if(cmptr->cmsg_level != SOL_SOCKET) {
682 where = "wrong cmsg_level";
685 if(cmptr->cmsg_type != SCM_RIGHTS) {
686 where = "wrong cmsg_type";
690 got_fd = *(int*)CMSG_DATA(cmptr);
691 /* For our last little bit of trickery, put the file descriptor
692 back into Perl_debug_log, as if we never actually closed it
694 if(got_fd != debug_fd) {
695 if (dup2(got_fd, debug_fd) == -1) {
702 PerlIO_flush(Perl_debug_log);
704 got = write(sock, &success, sizeof(success));
707 where = "write failed";
710 if(got < sizeof(success)) {
711 where = "short write";
718 int send_errno = errno;
719 unsigned char length = (unsigned char) strlen(where);
720 struct iovec failure[3] = {
721 {(void*)&send_errno, sizeof(send_errno)},
723 {(void*)where, length}
725 int got = writev(sock, failure, 3);
726 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
727 in the parent if we try to read from the socketpair after the
728 child has exited, even if there was data to read.
729 So sleep a bit to give the parent a fighting chance of
732 _exit((got == -1) ? errno : 0);
736 PL_dumper_fd = fd[0];
741 /* We must account for everything. */
743 /* Destroy the main CV and syntax tree */
744 /* Set PL_curcop now, because destroying ops can cause new SVs
745 to be generated in Perl_pad_swipe, and when running with
746 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
747 op from which the filename structure member is copied. */
748 PL_curcop = &PL_compiling;
750 /* ensure comppad/curpad to refer to main's pad */
751 if (CvPADLIST(PL_main_cv)) {
752 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
753 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
755 op_free(PL_main_root);
758 PL_main_start = NULL;
759 /* note that PL_main_cv isn't usually actually freed at this point,
760 * due to the CvOUTSIDE refs from subs compiled within it. It will
761 * get freed once all the subs are freed in sv_clean_all(), for
762 * destruct_level > 0 */
763 SvREFCNT_dec(PL_main_cv);
765 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
767 /* Tell PerlIO we are about to tear things apart in case
768 we have layers which are using resources that should
772 PerlIO_destruct(aTHX);
775 * Try to destruct global references. We do this first so that the
776 * destructors and destructees still exist. Some sv's might remain.
777 * Non-referenced objects are on their own.
781 /* unhook hooks which will soon be, or use, destroyed data */
782 SvREFCNT_dec(PL_warnhook);
784 SvREFCNT_dec(PL_diehook);
787 /* call exit list functions */
788 while (PL_exitlistlen-- > 0)
789 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
791 Safefree(PL_exitlist);
796 SvREFCNT_dec(PL_registered_mros);
798 /* jettison our possibly duplicated environment */
799 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
800 * so we certainly shouldn't free it here
803 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
804 if (environ != PL_origenviron && !PL_use_safe_putenv
806 /* only main thread can free environ[0] contents */
807 && PL_curinterp == aTHX
813 for (i = 0; environ[i]; i++)
814 safesysfree(environ[i]);
816 /* Must use safesysfree() when working with environ. */
817 safesysfree(environ);
819 environ = PL_origenviron;
822 #endif /* !PERL_MICRO */
824 if (destruct_level == 0) {
826 DEBUG_P(debprofdump());
828 #if defined(PERLIO_LAYERS)
829 /* No more IO - including error messages ! */
830 PerlIO_cleanup(aTHX);
833 CopFILE_free(&PL_compiling);
835 /* The exit() function will do everything that needs doing. */
839 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
842 /* the syntax tree is shared between clones
843 * so op_free(PL_main_root) only ReREFCNT_dec's
844 * REGEXPs in the parent interpreter
845 * we need to manually ReREFCNT_dec for the clones
848 I32 i = AvFILLp(PL_regex_padav);
849 SV **ary = AvARRAY(PL_regex_padav);
852 SvREFCNT_dec(ary[i]);
853 ary[i] = &PL_sv_undef;
859 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
860 PL_stashcache = NULL;
862 /* loosen bonds of global variables */
864 /* XXX can PL_parser still be non-null here? */
865 if(PL_parser && PL_parser->rsfp) {
866 (void)PerlIO_close(PL_parser->rsfp);
867 PL_parser->rsfp = NULL;
871 Safefree(PL_splitstr);
881 PL_doswitches = FALSE;
882 PL_dowarn = G_WARN_OFF;
883 #ifdef PERL_SAWAMPERSAND
884 PL_sawampersand = 0; /* must save all match strings */
888 Safefree(PL_inplace);
890 SvREFCNT_dec(PL_patchlevel);
891 SvREFCNT_dec(PL_apiversion);
894 SvREFCNT_dec(PL_e_script);
900 /* magical thingies */
902 SvREFCNT_dec(PL_ofsgv); /* *, */
905 SvREFCNT_dec(PL_ors_sv); /* $\ */
908 SvREFCNT_dec(PL_rs); /* $/ */
911 Safefree(PL_osname); /* $^O */
914 SvREFCNT_dec(PL_statname);
918 /* defgv, aka *_ should be taken care of elsewhere */
921 Safefree(PL_efloatbuf);
925 /* startup and shutdown function lists */
926 SvREFCNT_dec(PL_beginav);
927 SvREFCNT_dec(PL_beginav_save);
928 SvREFCNT_dec(PL_endav);
929 SvREFCNT_dec(PL_checkav);
930 SvREFCNT_dec(PL_checkav_save);
931 SvREFCNT_dec(PL_unitcheckav);
932 SvREFCNT_dec(PL_unitcheckav_save);
933 SvREFCNT_dec(PL_initav);
935 PL_beginav_save = NULL;
938 PL_checkav_save = NULL;
939 PL_unitcheckav = NULL;
940 PL_unitcheckav_save = NULL;
943 /* shortcuts just get cleared */
949 PL_last_in_gv = NULL;
957 SvREFCNT_dec(PL_envgv);
958 SvREFCNT_dec(PL_incgv);
959 SvREFCNT_dec(PL_argvgv);
960 SvREFCNT_dec(PL_replgv);
961 SvREFCNT_dec(PL_DBgv);
962 SvREFCNT_dec(PL_DBline);
963 SvREFCNT_dec(PL_DBsub);
972 SvREFCNT_dec(PL_argvout_stack);
973 PL_argvout_stack = NULL;
975 SvREFCNT_dec(PL_modglobal);
977 SvREFCNT_dec(PL_preambleav);
978 PL_preambleav = NULL;
979 SvREFCNT_dec(PL_subname);
981 #ifdef PERL_USES_PL_PIDSTATUS
982 SvREFCNT_dec(PL_pidstatus);
985 SvREFCNT_dec(PL_toptarget);
987 SvREFCNT_dec(PL_bodytarget);
988 PL_bodytarget = NULL;
989 PL_formtarget = NULL;
991 /* free locale stuff */
992 #ifdef USE_LOCALE_COLLATE
993 Safefree(PL_collation_name);
994 PL_collation_name = NULL;
997 #ifdef USE_LOCALE_NUMERIC
998 Safefree(PL_numeric_name);
999 PL_numeric_name = NULL;
1000 SvREFCNT_dec(PL_numeric_radix_sv);
1001 PL_numeric_radix_sv = NULL;
1004 /* clear character classes */
1005 for (i = 0; i < POSIX_SWASH_COUNT; i++) {
1006 SvREFCNT_dec(PL_utf8_swash_ptrs[i]);
1007 PL_utf8_swash_ptrs[i] = NULL;
1009 SvREFCNT_dec(PL_utf8_mark);
1010 SvREFCNT_dec(PL_utf8_toupper);
1011 SvREFCNT_dec(PL_utf8_totitle);
1012 SvREFCNT_dec(PL_utf8_tolower);
1013 SvREFCNT_dec(PL_utf8_tofold);
1014 SvREFCNT_dec(PL_utf8_idstart);
1015 SvREFCNT_dec(PL_utf8_idcont);
1016 SvREFCNT_dec(PL_utf8_foldclosures);
1017 SvREFCNT_dec(PL_AboveLatin1);
1018 SvREFCNT_dec(PL_UpperLatin1);
1019 SvREFCNT_dec(PL_Latin1);
1020 SvREFCNT_dec(PL_NonL1NonFinalFold);
1021 SvREFCNT_dec(PL_HasMultiCharFold);
1022 PL_utf8_mark = NULL;
1023 PL_utf8_toupper = NULL;
1024 PL_utf8_totitle = NULL;
1025 PL_utf8_tolower = NULL;
1026 PL_utf8_tofold = NULL;
1027 PL_utf8_idstart = NULL;
1028 PL_utf8_idcont = NULL;
1029 PL_utf8_foldclosures = NULL;
1030 PL_AboveLatin1 = NULL;
1031 PL_HasMultiCharFold = NULL;
1033 PL_NonL1NonFinalFold = NULL;
1034 PL_UpperLatin1 = NULL;
1035 for (i = 0; i < POSIX_CC_COUNT; i++) {
1036 SvREFCNT_dec(PL_Posix_ptrs[i]);
1037 PL_Posix_ptrs[i] = NULL;
1039 SvREFCNT_dec(PL_L1Posix_ptrs[i]);
1040 PL_L1Posix_ptrs[i] = NULL;
1042 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1043 PL_XPosix_ptrs[i] = NULL;
1046 if (!specialWARN(PL_compiling.cop_warnings))
1047 PerlMemShared_free(PL_compiling.cop_warnings);
1048 PL_compiling.cop_warnings = NULL;
1049 cophh_free(CopHINTHASH_get(&PL_compiling));
1050 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1051 CopFILE_free(&PL_compiling);
1053 /* Prepare to destruct main symbol table. */
1056 /* break ref loop *:: <=> %:: */
1057 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1060 SvREFCNT_dec(PL_curstname);
1061 PL_curstname = NULL;
1063 /* clear queued errors */
1064 SvREFCNT_dec(PL_errors);
1067 SvREFCNT_dec(PL_isarev);
1070 if (destruct_level >= 2) {
1071 if (PL_scopestack_ix != 0)
1072 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1073 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1074 (long)PL_scopestack_ix);
1075 if (PL_savestack_ix != 0)
1076 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1077 "Unbalanced saves: %ld more saves than restores\n",
1078 (long)PL_savestack_ix);
1079 if (PL_tmps_floor != -1)
1080 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1081 (long)PL_tmps_floor + 1);
1082 if (cxstack_ix != -1)
1083 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1084 (long)cxstack_ix + 1);
1088 SvREFCNT_dec(PL_regex_padav);
1089 PL_regex_padav = NULL;
1090 PL_regex_pad = NULL;
1093 #ifdef PERL_IMPLICIT_CONTEXT
1094 /* the entries in this list are allocated via SV PVX's, so get freed
1095 * in sv_clean_all */
1096 Safefree(PL_my_cxt_list);
1099 /* Now absolutely destruct everything, somehow or other, loops or no. */
1101 /* the 2 is for PL_fdpid and PL_strtab */
1102 while (sv_clean_all() > 2)
1106 Safefree(PL_stashpad); /* must come after sv_clean_all */
1109 AvREAL_off(PL_fdpid); /* no surviving entries */
1110 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1113 #ifdef HAVE_INTERP_INTERN
1117 /* constant strings */
1118 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1119 SvREFCNT_dec(PL_sv_consts[i]);
1120 PL_sv_consts[i] = NULL;
1123 /* Destruct the global string table. */
1125 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1126 * so that sv_free() won't fail on them.
1127 * Now that the global string table is using a single hunk of memory
1128 * for both HE and HEK, we either need to explicitly unshare it the
1129 * correct way, or actually free things here.
1132 const I32 max = HvMAX(PL_strtab);
1133 HE * const * const array = HvARRAY(PL_strtab);
1134 HE *hent = array[0];
1137 if (hent && ckWARN_d(WARN_INTERNAL)) {
1138 HE * const next = HeNEXT(hent);
1139 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1140 "Unbalanced string table refcount: (%ld) for \"%s\"",
1141 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1148 hent = array[riter];
1153 HvARRAY(PL_strtab) = 0;
1154 HvTOTALKEYS(PL_strtab) = 0;
1156 SvREFCNT_dec(PL_strtab);
1159 /* free the pointer tables used for cloning */
1160 ptr_table_free(PL_ptr_table);
1161 PL_ptr_table = (PTR_TBL_t*)NULL;
1164 /* free special SVs */
1166 SvREFCNT(&PL_sv_yes) = 0;
1167 sv_clear(&PL_sv_yes);
1168 SvANY(&PL_sv_yes) = NULL;
1169 SvFLAGS(&PL_sv_yes) = 0;
1171 SvREFCNT(&PL_sv_no) = 0;
1172 sv_clear(&PL_sv_no);
1173 SvANY(&PL_sv_no) = NULL;
1174 SvFLAGS(&PL_sv_no) = 0;
1178 for (i=0; i<=2; i++) {
1179 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1180 sv_clear(PERL_DEBUG_PAD(i));
1181 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1182 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1186 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1187 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1189 #ifdef DEBUG_LEAKING_SCALARS
1190 if (PL_sv_count != 0) {
1195 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1196 svend = &sva[SvREFCNT(sva)];
1197 for (sv = sva + 1; sv < svend; ++sv) {
1198 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1199 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1201 " refcnt=%"UVuf pTHX__FORMAT "\n"
1202 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1204 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1206 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1208 sv->sv_debug_inpad ? "for" : "by",
1209 sv->sv_debug_optype ?
1210 PL_op_name[sv->sv_debug_optype]: "(none)",
1211 PTR2UV(sv->sv_debug_parent),
1214 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1215 Perl_dump_sv_child(aTHX_ sv);
1221 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1225 /* Wait for up to 4 seconds for child to terminate.
1226 This seems to be the least effort way of timing out on reaping
1228 struct timeval waitfor = {4, 0};
1229 int sock = PL_dumper_fd;
1233 FD_SET(sock, &rset);
1234 select(sock + 1, &rset, NULL, NULL, &waitfor);
1235 waitpid(child, &status, WNOHANG);
1240 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1246 #if defined(PERLIO_LAYERS)
1247 /* No more IO - including error messages ! */
1248 PerlIO_cleanup(aTHX);
1251 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1252 as currently layers use it rather than NULL as a marker
1253 for no arg - and will try and SvREFCNT_dec it.
1255 SvREFCNT(&PL_sv_undef) = 0;
1256 SvREADONLY_off(&PL_sv_undef);
1258 Safefree(PL_origfilename);
1259 PL_origfilename = NULL;
1260 Safefree(PL_reg_curpm);
1261 free_tied_hv_pool();
1262 Safefree(PL_op_mask);
1263 Safefree(PL_psig_name);
1264 PL_psig_name = (SV**)NULL;
1265 PL_psig_ptr = (SV**)NULL;
1267 /* We need to NULL PL_psig_pend first, so that
1268 signal handlers know not to use it */
1269 int *psig_save = PL_psig_pend;
1270 PL_psig_pend = (int*)NULL;
1271 Safefree(psig_save);
1274 TAINTING_set(FALSE);
1275 TAINT_WARN_set(FALSE);
1276 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1279 DEBUG_P(debprofdump());
1281 #ifdef USE_REENTRANT_API
1282 Perl_reentrant_free(aTHX);
1287 while (PL_regmatch_slab) {
1288 regmatch_slab *s = PL_regmatch_slab;
1289 PL_regmatch_slab = PL_regmatch_slab->next;
1293 /* As the absolutely last thing, free the non-arena SV for mess() */
1296 /* we know that type == SVt_PVMG */
1298 /* it could have accumulated taint magic */
1301 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1302 moremagic = mg->mg_moremagic;
1303 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1305 Safefree(mg->mg_ptr);
1309 /* we know that type >= SVt_PV */
1310 SvPV_free(PL_mess_sv);
1311 Safefree(SvANY(PL_mess_sv));
1312 Safefree(PL_mess_sv);
1319 =for apidoc perl_free
1321 Releases a Perl interpreter. See L<perlembed>.
1331 PERL_ARGS_ASSERT_PERL_FREE;
1333 if (PL_veto_cleanup)
1336 #ifdef PERL_TRACK_MEMPOOL
1339 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1340 * value as we're probably hunting memory leaks then
1342 if (PL_perl_destruct_level == 0) {
1343 const U32 old_debug = PL_debug;
1344 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1345 thread at thread exit. */
1347 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1348 "free this thread's memory\n");
1349 PL_debug &= ~ DEBUG_m_FLAG;
1351 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
1352 safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
1353 PL_debug = old_debug;
1358 #if defined(WIN32) || defined(NETWARE)
1359 # if defined(PERL_IMPLICIT_SYS)
1362 void *host = nw_internal_host;
1363 PerlMem_free(aTHXx);
1364 nw_delete_internal_host(host);
1366 void *host = w32_internal_host;
1367 PerlMem_free(aTHXx);
1368 win32_delete_internal_host(host);
1372 PerlMem_free(aTHXx);
1375 PerlMem_free(aTHXx);
1379 #if defined(USE_ITHREADS)
1380 /* provide destructors to clean up the thread key when libperl is unloaded */
1381 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1383 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1384 #pragma fini "perl_fini"
1385 #elif defined(__sun) && !defined(__GNUC__)
1386 #pragma fini (perl_fini)
1390 #if defined(__GNUC__)
1391 __attribute__((destructor))
1397 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1400 PL_curinterp && !PL_veto_cleanup)
1405 #endif /* THREADS */
1408 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1411 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1412 PL_exitlist[PL_exitlistlen].fn = fn;
1413 PL_exitlist[PL_exitlistlen].ptr = ptr;
1418 =for apidoc perl_parse
1420 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1425 #define SET_CURSTASH(newstash) \
1426 if (PL_curstash != newstash) { \
1427 SvREFCNT_dec(PL_curstash); \
1428 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1432 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1439 PERL_ARGS_ASSERT_PERL_PARSE;
1440 #ifndef MULTIPLICITY
1441 PERL_UNUSED_ARG(my_perl);
1443 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) || defined(USE_HASH_SEED_DEBUG)
1445 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1447 if (s && (atoi(s) == 1)) {
1448 unsigned char *seed= PERL_HASH_SEED;
1449 unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1450 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1451 while (seed < seed_end) {
1452 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1454 #ifdef PERL_HASH_RANDOMIZE_KEYS
1455 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1456 PL_HASH_RAND_BITS_ENABLED,
1457 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1459 PerlIO_printf(Perl_debug_log, "\n");
1462 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1466 if (PL_origalen != 0) {
1467 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1470 /* Set PL_origalen be the sum of the contiguous argv[]
1471 * elements plus the size of the env in case that it is
1472 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1473 * as the maximum modifiable length of $0. In the worst case
1474 * the area we are able to modify is limited to the size of
1475 * the original argv[0]. (See below for 'contiguous', though.)
1477 const char *s = NULL;
1480 ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
1481 /* Do the mask check only if the args seem like aligned. */
1483 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1485 /* See if all the arguments are contiguous in memory. Note
1486 * that 'contiguous' is a loose term because some platforms
1487 * align the argv[] and the envp[]. If the arguments look
1488 * like non-aligned, assume that they are 'strictly' or
1489 * 'traditionally' contiguous. If the arguments look like
1490 * aligned, we just check that they are within aligned
1491 * PTRSIZE bytes. As long as no system has something bizarre
1492 * like the argv[] interleaved with some other data, we are
1493 * fine. (Did I just evoke Murphy's Law?) --jhi */
1494 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1496 for (i = 1; i < PL_origargc; i++) {
1497 if ((PL_origargv[i] == s + 1
1499 || PL_origargv[i] == s + 2
1504 (PL_origargv[i] > s &&
1506 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1517 #ifndef PERL_USE_SAFE_PUTENV
1518 /* Can we grab env area too to be used as the area for $0? */
1519 if (s && PL_origenviron && !PL_use_safe_putenv) {
1520 if ((PL_origenviron[0] == s + 1)
1523 (PL_origenviron[0] > s &&
1524 PL_origenviron[0] <=
1525 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1528 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1529 s = PL_origenviron[0];
1532 my_setenv("NoNe SuCh", NULL);
1533 /* Force copy of environment. */
1534 for (i = 1; PL_origenviron[i]; i++) {
1535 if (PL_origenviron[i] == s + 1
1538 (PL_origenviron[i] > s &&
1539 PL_origenviron[i] <=
1540 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1543 s = PL_origenviron[i];
1551 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1553 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1558 /* Come here if running an undumped a.out. */
1560 PL_origfilename = savepv(argv[0]);
1561 PL_do_undump = FALSE;
1562 cxstack_ix = -1; /* start label stack again */
1564 assert (!TAINT_get);
1568 init_postdump_symbols(argc,argv,env);
1573 op_free(PL_main_root);
1574 PL_main_root = NULL;
1576 PL_main_start = NULL;
1577 SvREFCNT_dec(PL_main_cv);
1581 oldscope = PL_scopestack_ix;
1582 PL_dowarn = G_WARN_OFF;
1587 parse_body(env,xsinit);
1588 if (PL_unitcheckav) {
1589 call_list(oldscope, PL_unitcheckav);
1592 PERL_SET_PHASE(PERL_PHASE_CHECK);
1593 call_list(oldscope, PL_checkav);
1601 /* my_exit() was called */
1602 while (PL_scopestack_ix > oldscope)
1605 SET_CURSTASH(PL_defstash);
1606 if (PL_unitcheckav) {
1607 call_list(oldscope, PL_unitcheckav);
1610 PERL_SET_PHASE(PERL_PHASE_CHECK);
1611 call_list(oldscope, PL_checkav);
1616 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1624 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1625 miniperl, and we need to see those flags reflected in the values here. */
1627 /* What this returns is subject to change. Use the public interface in Config.
1630 S_Internals_V(pTHX_ CV *cv)
1633 #ifdef LOCAL_PATCH_COUNT
1634 const int local_patch_count = LOCAL_PATCH_COUNT;
1636 const int local_patch_count = 0;
1638 const int entries = 3 + local_patch_count;
1640 static const char non_bincompat_options[] =
1647 # ifdef NO_HASH_SEED
1650 # ifdef NO_TAINT_SUPPORT
1653 # ifdef PERL_DISABLE_PMC
1656 # ifdef PERL_DONT_CREATE_GVSV
1657 " PERL_DONT_CREATE_GVSV"
1659 # ifdef PERL_EXTERNAL_GLOB
1660 " PERL_EXTERNAL_GLOB"
1662 # ifdef PERL_HASH_FUNC_SIPHASH
1663 " PERL_HASH_FUNC_SIPHASH"
1665 # ifdef PERL_HASH_FUNC_SDBM
1666 " PERL_HASH_FUNC_SDBM"
1668 # ifdef PERL_HASH_FUNC_DJB2
1669 " PERL_HASH_FUNC_DJB2"
1671 # ifdef PERL_HASH_FUNC_SUPERFAST
1672 " PERL_HASH_FUNC_SUPERFAST"
1674 # ifdef PERL_HASH_FUNC_MURMUR3
1675 " PERL_HASH_FUNC_MURMUR3"
1677 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1678 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1680 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1681 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1683 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1684 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1686 # ifdef PERL_IS_MINIPERL
1689 # ifdef PERL_MALLOC_WRAP
1692 # ifdef PERL_MEM_LOG
1695 # ifdef PERL_MEM_LOG_NOIMPL
1696 " PERL_MEM_LOG_NOIMPL"
1698 # ifdef PERL_NEW_COPY_ON_WRITE
1699 " PERL_NEW_COPY_ON_WRITE"
1701 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1702 " PERL_PERTURB_KEYS_DETERMINISTIC"
1704 # ifdef PERL_PERTURB_KEYS_DISABLED
1705 " PERL_PERTURB_KEYS_DISABLED"
1707 # ifdef PERL_PERTURB_KEYS_RANDOM
1708 " PERL_PERTURB_KEYS_RANDOM"
1710 # ifdef PERL_PRESERVE_IVUV
1711 " PERL_PRESERVE_IVUV"
1713 # ifdef PERL_RELOCATABLE_INCPUSH
1714 " PERL_RELOCATABLE_INCPUSH"
1716 # ifdef PERL_USE_DEVEL
1719 # ifdef PERL_USE_SAFE_PUTENV
1720 " PERL_USE_SAFE_PUTENV"
1722 # ifdef UNLINK_ALL_VERSIONS
1723 " UNLINK_ALL_VERSIONS"
1725 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1726 " USE_ATTRIBUTES_FOR_PERLIO"
1728 # ifdef USE_FAST_STDIO
1731 # ifdef USE_HASH_SEED_EXPLICIT
1732 " USE_HASH_SEED_EXPLICIT"
1737 # ifdef USE_LOCALE_CTYPE
1740 # ifdef USE_PERL_ATOF
1743 # ifdef USE_SITECUSTOMIZE
1744 " USE_SITECUSTOMIZE"
1747 PERL_UNUSED_ARG(cv);
1748 PERL_UNUSED_ARG(items);
1750 EXTEND(SP, entries);
1752 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1753 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1754 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1758 PUSHs(Perl_newSVpvn_flags(aTHX_
1759 STR_WITH_LEN("Compiled at " __DATE__ " " __TIME__),
1762 PUSHs(Perl_newSVpvn_flags(aTHX_ STR_WITH_LEN("Compiled on " __DATE__),
1766 PUSHs(&PL_sv_undef);
1769 for (i = 1; i <= local_patch_count; i++) {
1770 /* This will be an undef, if PL_localpatches[i] is NULL. */
1771 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1777 #define INCPUSH_UNSHIFT 0x01
1778 #define INCPUSH_ADD_OLD_VERS 0x02
1779 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1780 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1781 #define INCPUSH_NOT_BASEDIR 0x10
1782 #define INCPUSH_CAN_RELOCATE 0x20
1783 #define INCPUSH_ADD_SUB_DIRS \
1784 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1787 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1791 int argc = PL_origargc;
1792 char **argv = PL_origargv;
1793 const char *scriptname = NULL;
1794 VOL bool dosearch = FALSE;
1796 bool doextract = FALSE;
1797 const char *cddir = NULL;
1798 #ifdef USE_SITECUSTOMIZE
1799 bool minus_f = FALSE;
1801 SV *linestr_sv = NULL;
1802 bool add_read_e_script = FALSE;
1803 U32 lex_start_flags = 0;
1805 PERL_SET_PHASE(PERL_PHASE_START);
1811 for (argc--,argv++; argc > 0; argc--,argv++) {
1812 if (argv[0][0] != '-' || !argv[0][1])
1818 #ifndef PERL_STRICT_CR
1842 if ((s = moreswitches(s)))
1847 #if SILENT_NO_TAINT_SUPPORT
1848 /* silently ignore */
1849 #elif NO_TAINT_SUPPORT
1850 Perl_croak_nocontext("This perl was compiled without taint support. "
1851 "Cowardly refusing to run with -t or -T flags");
1853 CHECK_MALLOC_TOO_LATE_FOR('t');
1854 if( !TAINTING_get ) {
1855 TAINT_WARN_set(TRUE);
1862 #if SILENT_NO_TAINT_SUPPORT
1863 /* silently ignore */
1864 #elif NO_TAINT_SUPPORT
1865 Perl_croak_nocontext("This perl was compiled without taint support. "
1866 "Cowardly refusing to run with -t or -T flags");
1868 CHECK_MALLOC_TOO_LATE_FOR('T');
1870 TAINT_WARN_set(FALSE);
1879 forbid_setid('e', FALSE);
1881 PL_e_script = newSVpvs("");
1882 add_read_e_script = TRUE;
1885 sv_catpv(PL_e_script, s);
1887 sv_catpv(PL_e_script, argv[1]);
1891 Perl_croak(aTHX_ "No code specified for -%c", c);
1892 sv_catpvs(PL_e_script, "\n");
1896 #ifdef USE_SITECUSTOMIZE
1902 case 'I': /* -I handled both here and in moreswitches() */
1903 forbid_setid('I', FALSE);
1904 if (!*++s && (s=argv[1]) != NULL) {
1908 STRLEN len = strlen(s);
1909 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
1912 Perl_croak(aTHX_ "No directory specified for -I");
1915 forbid_setid('S', FALSE);
1924 opts_prog = newSVpvs("use Config; Config::_V()");
1928 opts_prog = Perl_newSVpvf(aTHX_
1929 "use Config; Config::config_vars(qw%c%s%c)",
1933 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
1934 /* don't look for script or read stdin */
1935 scriptname = BIT_BUCKET;
1947 if (!*++s || isSPACE(*s)) {
1951 /* catch use of gnu style long options.
1952 Both of these exit immediately. */
1953 if (strEQ(s, "version"))
1955 if (strEQ(s, "help"))
1960 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
1971 #ifndef SECURE_INTERNAL_GETENV
1974 (s = PerlEnv_getenv("PERL5OPT")))
1978 if (*s == '-' && *(s+1) == 'T') {
1979 #if SILENT_NO_TAINT_SUPPORT
1980 /* silently ignore */
1981 #elif NO_TAINT_SUPPORT
1982 Perl_croak_nocontext("This perl was compiled without taint support. "
1983 "Cowardly refusing to run with -t or -T flags");
1985 CHECK_MALLOC_TOO_LATE_FOR('T');
1987 TAINT_WARN_set(FALSE);
1991 char *popt_copy = NULL;
2004 if (!strchr("CDIMUdmtwW", *s))
2005 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2009 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2010 s = popt_copy + (s - d);
2018 #if SILENT_NO_TAINT_SUPPORT
2019 /* silently ignore */
2020 #elif NO_TAINT_SUPPORT
2021 Perl_croak_nocontext("This perl was compiled without taint support. "
2022 "Cowardly refusing to run with -t or -T flags");
2024 if( !TAINTING_get) {
2025 TAINT_WARN_set(TRUE);
2037 /* Set $^X early so that it can be used for relocatable paths in @INC */
2038 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2039 assert (!TAINT_get);
2044 #if defined(USE_SITECUSTOMIZE)
2046 /* The games with local $! are to avoid setting errno if there is no
2047 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2048 ie a q() operator with a NUL byte as a the delimiter. This avoids
2049 problems with pathnames containing (say) ' */
2050 # ifdef PERL_IS_MINIPERL
2051 AV *const inc = GvAV(PL_incgv);
2052 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2055 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2056 it should be reported immediately as a build failure. */
2057 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2059 "BEGIN { do {local $!; -f q%c%"SVf"/buildcustomize.pl%c} and do q%c%"SVf"/buildcustomize.pl%c || die $@ }",
2064 /* SITELIB_EXP is a function call on Win32. */
2065 const char *const raw_sitelib = SITELIB_EXP;
2067 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2068 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2069 INCPUSH_CAN_RELOCATE);
2070 const char *const sitelib = SvPVX(sitelib_sv);
2071 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2073 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2076 assert (SvREFCNT(sitelib_sv) == 1);
2077 SvREFCNT_dec(sitelib_sv);
2084 scriptname = argv[0];
2087 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2089 else if (scriptname == NULL) {
2091 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2097 assert (!TAINT_get);
2101 bool suidscript = FALSE;
2103 rsfp = open_script(scriptname, dosearch, &suidscript);
2105 rsfp = PerlIO_stdin();
2106 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2109 validate_suid(rsfp);
2112 # if defined(SIGCHLD) || defined(SIGCLD)
2115 # define SIGCHLD SIGCLD
2117 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2118 if (sigstate == (Sighandler_t) SIG_IGN) {
2119 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2120 "Can't ignore signal CHLD, forcing to default");
2121 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2129 /* This will croak if suidscript is true, as -x cannot be used with
2131 forbid_setid('x', suidscript);
2132 /* Hence you can't get here if suidscript is true */
2134 linestr_sv = newSV_type(SVt_PV);
2135 lex_start_flags |= LEX_START_COPIED;
2136 find_beginning(linestr_sv, rsfp);
2137 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2138 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2142 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2143 CvUNIQUE_on(PL_compcv);
2145 CvPADLIST(PL_compcv) = pad_new(0);
2147 PL_isarev = newHV();
2150 boot_core_UNIVERSAL();
2152 newXS("Internals::V", S_Internals_V, __FILE__);
2155 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2157 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2163 # ifdef HAS_SOCKS5_INIT
2164 socks5_init(argv[0]);
2170 init_predump_symbols();
2171 /* init_postdump_symbols not currently designed to be called */
2172 /* more than once (ENV isn't cleared first, for example) */
2173 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2175 init_postdump_symbols(argc,argv,env);
2177 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2178 * or explicitly in some platforms.
2179 * locale.c:Perl_init_i18nl10n() if the environment
2180 * look like the user wants to use UTF-8. */
2181 #if defined(__SYMBIAN32__)
2182 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2184 # ifndef PERL_IS_MINIPERL
2186 /* Requires init_predump_symbols(). */
2187 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2192 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2193 * and the default open disciplines. */
2194 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2195 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2197 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2198 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2199 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2201 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2202 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2203 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2205 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2206 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2207 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2209 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2210 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2213 sv_setpvs(sv, ":utf8\0:utf8");
2215 sv_setpvs(sv, ":utf8\0");
2218 sv_setpvs(sv, "\0:utf8");
2227 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2228 if (strEQ(s, "unsafe"))
2229 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2230 else if (strEQ(s, "safe"))
2231 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2233 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2240 if (!TAINTING_get &&
2241 (s = PerlEnv_getenv("PERL_XMLDUMP"))) {
2245 PL_xmlfp = PerlIO_stdout();
2247 PL_xmlfp = PerlIO_open(s, "w");
2249 Perl_croak(aTHX_ "Can't open %s", s);
2251 my_setenv("PERL_XMLDUMP", NULL); /* hide from subprocs */
2257 if ((s = PerlEnv_getenv("PERL_MADSKILLS"))) {
2258 PL_madskills = atoi(s);
2259 my_setenv("PERL_MADSKILLS", NULL); /* hide from subprocs */
2264 lex_start(linestr_sv, rsfp, lex_start_flags);
2265 SvREFCNT_dec(linestr_sv);
2267 PL_subname = newSVpvs("main");
2269 if (add_read_e_script)
2270 filter_add(read_e_script, NULL);
2272 /* now parse the script */
2274 SETERRNO(0,SS_NORMAL);
2275 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2277 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2279 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2283 CopLINE_set(PL_curcop, 0);
2284 SET_CURSTASH(PL_defstash);
2286 SvREFCNT_dec(PL_e_script);
2294 SAVECOPFILE(PL_curcop);
2295 SAVECOPLINE(PL_curcop);
2296 gv_check(PL_defstash);
2305 if ((s=PerlEnv_getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
2306 dump_mstats("after compilation:");
2311 PL_restartjmpenv = NULL;
2317 =for apidoc perl_run
2319 Tells a Perl interpreter to run. See L<perlembed>.
2332 PERL_ARGS_ASSERT_PERL_RUN;
2333 #ifndef MULTIPLICITY
2334 PERL_UNUSED_ARG(my_perl);
2337 oldscope = PL_scopestack_ix;
2345 cxstack_ix = -1; /* start context stack again */
2347 case 0: /* normal completion */
2351 case 2: /* my_exit() */
2352 while (PL_scopestack_ix > oldscope)
2355 SET_CURSTASH(PL_defstash);
2356 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2357 PL_endav && !PL_minus_c) {
2358 PERL_SET_PHASE(PERL_PHASE_END);
2359 call_list(oldscope, PL_endav);
2362 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2363 dump_mstats("after execution: ");
2369 POPSTACK_TO(PL_mainstack);
2372 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2383 S_run_body(pTHX_ I32 oldscope)
2386 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2387 PL_sawampersand ? "Enabling" : "Omitting",
2388 (unsigned int)(PL_sawampersand)));
2390 if (!PL_restartop) {
2394 exit(0); /* less likely to core dump than my_exit(0) */
2398 if (DEBUG_x_TEST || DEBUG_B_TEST)
2399 dump_all_perl(!DEBUG_B_TEST);
2401 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2405 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2408 if (PERLDB_SINGLE && PL_DBsingle)
2409 sv_setiv(PL_DBsingle, 1);
2411 PERL_SET_PHASE(PERL_PHASE_INIT);
2412 call_list(oldscope, PL_initav);
2414 #ifdef PERL_DEBUG_READONLY_OPS
2415 if (PL_main_root && PL_main_root->op_slabbed)
2416 Slab_to_ro(OpSLAB(PL_main_root));
2422 PERL_SET_PHASE(PERL_PHASE_RUN);
2425 PL_restartjmpenv = NULL;
2426 PL_op = PL_restartop;
2430 else if (PL_main_start) {
2431 CvDEPTH(PL_main_cv) = 1;
2432 PL_op = PL_main_start;
2436 assert(0); /* NOTREACHED */
2440 =head1 SV Manipulation Functions
2442 =for apidoc p||get_sv
2444 Returns the SV of the specified Perl scalar. C<flags> are passed to
2445 C<gv_fetchpv>. If C<GV_ADD> is set and the
2446 Perl variable does not exist then it will be created. If C<flags> is zero
2447 and the variable does not exist then NULL is returned.
2453 Perl_get_sv(pTHX_ const char *name, I32 flags)
2457 PERL_ARGS_ASSERT_GET_SV;
2459 gv = gv_fetchpv(name, flags, SVt_PV);
2466 =head1 Array Manipulation Functions
2468 =for apidoc p||get_av
2470 Returns the AV of the specified Perl global or package array with the given
2471 name (so it won't work on lexical variables). C<flags> are passed
2472 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2473 Perl variable does not exist then it will be created. If C<flags> is zero
2474 and the variable does not exist then NULL is returned.
2476 Perl equivalent: C<@{"$name"}>.
2482 Perl_get_av(pTHX_ const char *name, I32 flags)
2484 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2486 PERL_ARGS_ASSERT_GET_AV;
2496 =head1 Hash Manipulation Functions
2498 =for apidoc p||get_hv
2500 Returns the HV of the specified Perl hash. C<flags> are passed to
2501 C<gv_fetchpv>. If C<GV_ADD> is set and the
2502 Perl variable does not exist then it will be created. If C<flags> is zero
2503 and the variable does not exist then NULL is returned.
2509 Perl_get_hv(pTHX_ const char *name, I32 flags)
2511 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2513 PERL_ARGS_ASSERT_GET_HV;
2523 =head1 CV Manipulation Functions
2525 =for apidoc p||get_cvn_flags
2527 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2528 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2529 exist then it will be declared (which has the same effect as saying
2530 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2531 then NULL is returned.
2533 =for apidoc p||get_cv
2535 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2541 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2543 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2545 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2547 /* XXX this is probably not what they think they're getting.
2548 * It has the same effect as "sub name;", i.e. just a forward
2550 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2551 return newSTUB(gv,0);
2558 /* Nothing in core calls this now, but we can't replace it with a macro and
2559 move it to mathoms.c as a macro would evaluate name twice. */
2561 Perl_get_cv(pTHX_ const char *name, I32 flags)
2563 PERL_ARGS_ASSERT_GET_CV;
2565 return get_cvn_flags(name, strlen(name), flags);
2568 /* Be sure to refetch the stack pointer after calling these routines. */
2572 =head1 Callback Functions
2574 =for apidoc p||call_argv
2576 Performs a callback to the specified named and package-scoped Perl subroutine
2577 with C<argv> (a NULL-terminated array of strings) as arguments. See L<perlcall>.
2579 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2585 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2587 /* See G_* flags in cop.h */
2588 /* null terminated arg list */
2593 PERL_ARGS_ASSERT_CALL_ARGV;
2598 mXPUSHs(newSVpv(*argv,0));
2603 return call_pv(sub_name, flags);
2607 =for apidoc p||call_pv
2609 Performs a callback to the specified Perl sub. See L<perlcall>.
2615 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2616 /* name of the subroutine */
2617 /* See G_* flags in cop.h */
2619 PERL_ARGS_ASSERT_CALL_PV;
2621 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2625 =for apidoc p||call_method
2627 Performs a callback to the specified Perl method. The blessed object must
2628 be on the stack. See L<perlcall>.
2634 Perl_call_method(pTHX_ const char *methname, I32 flags)
2635 /* name of the subroutine */
2636 /* See G_* flags in cop.h */
2640 PERL_ARGS_ASSERT_CALL_METHOD;
2642 len = strlen(methname);
2643 sv = flags & G_METHOD_NAMED
2644 ? sv_2mortal(newSVpvn_share(methname, len,0))
2645 : newSVpvn_flags(methname, len, SVs_TEMP);
2647 return call_sv(sv, flags | G_METHOD);
2650 /* May be called with any of a CV, a GV, or an SV containing the name. */
2652 =for apidoc p||call_sv
2654 Performs a callback to the Perl sub whose name is in the SV. See
2661 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2662 /* See G_* flags in cop.h */
2665 LOGOP myop; /* fake syntax tree node */
2671 bool oldcatch = CATCH_GET;
2673 OP* const oldop = PL_op;
2676 PERL_ARGS_ASSERT_CALL_SV;
2678 if (flags & G_DISCARD) {
2682 if (!(flags & G_WANT)) {
2683 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2688 Zero(&myop, 1, LOGOP);
2689 if (!(flags & G_NOARGS))
2690 myop.op_flags |= OPf_STACKED;
2691 myop.op_flags |= OP_GIMME_REVERSE(flags);
2695 EXTEND(PL_stack_sp, 1);
2696 if (!(flags & G_METHOD_NAMED))
2697 *++PL_stack_sp = sv;
2699 oldscope = PL_scopestack_ix;
2701 if (PERLDB_SUB && PL_curstash != PL_debstash
2702 /* Handle first BEGIN of -d. */
2703 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2704 /* Try harder, since this may have been a sighandler, thus
2705 * curstash may be meaningless. */
2706 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2707 && !(flags & G_NODEBUG))
2708 myop.op_private |= OPpENTERSUB_DB;
2710 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2711 if ( flags & G_METHOD_NAMED ) {
2712 Zero(&method_svop, 1, SVOP);
2713 method_svop.op_next = (OP*)&myop;
2714 method_svop.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2715 method_svop.op_type = OP_METHOD_NAMED;
2716 method_svop.op_sv = sv;
2717 PL_op = (OP*)&method_svop;
2719 Zero(&method_unop, 1, UNOP);
2720 method_unop.op_next = (OP*)&myop;
2721 method_unop.op_ppaddr = PL_ppaddr[OP_METHOD];
2722 method_unop.op_type = OP_METHOD;
2723 PL_op = (OP*)&method_unop;
2725 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2726 myop.op_type = OP_ENTERSUB;
2730 if (!(flags & G_EVAL)) {
2732 CALL_BODY_SUB((OP*)&myop);
2733 retval = PL_stack_sp - (PL_stack_base + oldmark);
2734 CATCH_SET(oldcatch);
2737 myop.op_other = (OP*)&myop;
2739 create_eval_scope(flags|G_FAKINGEVAL);
2747 CALL_BODY_SUB((OP*)&myop);
2748 retval = PL_stack_sp - (PL_stack_base + oldmark);
2749 if (!(flags & G_KEEPERR)) {
2757 /* my_exit() was called */
2758 SET_CURSTASH(PL_defstash);
2762 assert(0); /* NOTREACHED */
2765 PL_restartjmpenv = NULL;
2766 PL_op = PL_restartop;
2770 PL_stack_sp = PL_stack_base + oldmark;
2771 if ((flags & G_WANT) == G_ARRAY)
2775 *++PL_stack_sp = &PL_sv_undef;
2780 if (PL_scopestack_ix > oldscope)
2781 delete_eval_scope();
2785 if (flags & G_DISCARD) {
2786 PL_stack_sp = PL_stack_base + oldmark;
2795 /* Eval a string. The G_EVAL flag is always assumed. */
2798 =for apidoc p||eval_sv
2800 Tells Perl to C<eval> the string in the SV. It supports the same flags
2801 as C<call_sv>, with the obvious exception of G_EVAL. See L<perlcall>.
2807 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2809 /* See G_* flags in cop.h */
2813 UNOP myop; /* fake syntax tree node */
2814 VOL I32 oldmark = SP - PL_stack_base;
2817 OP* const oldop = PL_op;
2820 PERL_ARGS_ASSERT_EVAL_SV;
2822 if (flags & G_DISCARD) {
2829 Zero(&myop, 1, UNOP);
2830 EXTEND(PL_stack_sp, 1);
2831 *++PL_stack_sp = sv;
2833 if (!(flags & G_NOARGS))
2834 myop.op_flags = OPf_STACKED;
2835 myop.op_type = OP_ENTEREVAL;
2836 myop.op_flags |= OP_GIMME_REVERSE(flags);
2837 if (flags & G_KEEPERR)
2838 myop.op_flags |= OPf_SPECIAL;
2840 if (flags & G_RE_REPARSING)
2841 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
2843 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2844 * before a PUSHEVAL, which corrupts the stack after a croak */
2845 TAINT_PROPER("eval_sv()");
2851 if (PL_op == (OP*)(&myop)) {
2852 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2854 goto fail; /* failed in compilation */
2857 retval = PL_stack_sp - (PL_stack_base + oldmark);
2858 if (!(flags & G_KEEPERR)) {
2866 /* my_exit() was called */
2867 SET_CURSTASH(PL_defstash);
2871 assert(0); /* NOTREACHED */
2874 PL_restartjmpenv = NULL;
2875 PL_op = PL_restartop;
2880 PL_stack_sp = PL_stack_base + oldmark;
2881 if ((flags & G_WANT) == G_ARRAY)
2885 *++PL_stack_sp = &PL_sv_undef;
2891 if (flags & G_DISCARD) {
2892 PL_stack_sp = PL_stack_base + oldmark;
2902 =for apidoc p||eval_pv
2904 Tells Perl to C<eval> the given string and return an SV* result.
2910 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
2913 SV* sv = newSVpv(p, 0);
2915 PERL_ARGS_ASSERT_EVAL_PV;
2917 eval_sv(sv, G_SCALAR);
2926 /* just check empty string or undef? */
2927 if (croak_on_error) {
2928 SV * const errsv = ERRSV;
2929 if(SvTRUE_NN(errsv))
2930 /* replace with croak_sv? */
2931 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
2937 /* Require a module. */
2940 =head1 Embedding Functions
2942 =for apidoc p||require_pv
2944 Tells Perl to C<require> the file named by the string argument. It is
2945 analogous to the Perl code C<eval "require '$file'">. It's even
2946 implemented that way; consider using load_module instead.
2951 Perl_require_pv(pTHX_ const char *pv)
2957 PERL_ARGS_ASSERT_REQUIRE_PV;
2959 PUSHSTACKi(PERLSI_REQUIRE);
2960 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
2961 eval_sv(sv_2mortal(sv), G_DISCARD);
2966 S_usage(pTHX) /* XXX move this out into a module ? */
2968 /* This message really ought to be max 23 lines.
2969 * Removed -h because the user already knows that option. Others? */
2971 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
2972 minimum of 509 character string literals. */
2973 static const char * const usage_msg[] = {
2974 " -0[octal] specify record separator (\\0, if no argument)\n"
2975 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
2976 " -C[number/list] enables the listed Unicode features\n"
2977 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
2978 " -d[:debugger] run program under debugger\n"
2979 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
2980 " -e program one line of program (several -e's allowed, omit programfile)\n"
2981 " -E program like -e, but enables all optional features\n"
2982 " -f don't do $sitelib/sitecustomize.pl at startup\n"
2983 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
2984 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
2985 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
2986 " -l[octal] enable line ending processing, specifies line terminator\n"
2987 " -[mM][-]module execute \"use/no module...\" before executing program\n"
2988 " -n assume \"while (<>) { ... }\" loop around program\n"
2989 " -p assume loop like -n but print line also, like sed\n"
2990 " -s enable rudimentary parsing for switches after programfile\n"
2991 " -S look for programfile using PATH environment variable\n",
2992 " -t enable tainting warnings\n"
2993 " -T enable tainting checks\n"
2994 " -u dump core after parsing program\n"
2995 " -U allow unsafe operations\n"
2996 " -v print version, patchlevel and license\n"
2997 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
2998 " -w enable many useful warnings\n"
2999 " -W enable all warnings\n"
3000 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3001 " -X disable all warnings\n"
3003 "Run 'perldoc perl' for more help with Perl.\n\n",
3006 const char * const *p = usage_msg;
3007 PerlIO *out = PerlIO_stdout();
3010 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3013 PerlIO_puts(out, *p++);
3017 /* convert a string of -D options (or digits) into an int.
3018 * sets *s to point to the char after the options */
3022 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3024 static const char * const usage_msgd[] = {
3025 " Debugging flag values: (see also -d)\n"
3026 " p Tokenizing and parsing (with v, displays parse stack)\n"
3027 " s Stack snapshots (with v, displays all stacks)\n"
3028 " l Context (loop) stack processing\n"
3029 " t Trace execution\n"
3030 " o Method and overloading resolution\n",
3031 " c String/numeric conversions\n"
3032 " P Print profiling info, source file input state\n"
3033 " m Memory and SV allocation\n"
3034 " f Format processing\n"
3035 " r Regular expression parsing and execution\n"
3036 " x Syntax tree dump\n",
3037 " u Tainting checks\n"
3038 " H Hash dump -- usurps values()\n"
3039 " X Scratchpad allocation\n"
3041 " S Op slab allocation\n"
3043 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3044 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3045 " v Verbose: use in conjunction with other flags\n"
3046 " C Copy On Write\n"
3047 " A Consistency checks on internal structures\n"
3048 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3049 " M trace smart match resolution\n"
3050 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3055 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3058 /* if adding extra options, remember to update DEBUG_MASK */
3059 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMB";
3061 for (; isWORDCHAR(**s); (*s)++) {
3062 const char * const d = strchr(debopts,**s);
3064 i |= 1 << (d - debopts);
3065 else if (ckWARN_d(WARN_DEBUGGING))
3066 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3067 "invalid option -D%c, use -D'' to see choices\n", **s);
3070 else if (isDIGIT(**s)) {
3072 for (; isWORDCHAR(**s); (*s)++) ;
3074 else if (givehelp) {
3075 const char *const *p = usage_msgd;
3076 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3079 if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
3080 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3081 "-Dp not implemented on this platform\n");
3087 /* This routine handles any switches that can be given during run */
3090 Perl_moreswitches(pTHX_ const char *s)
3094 const char option = *s; /* used to remember option in -m/-M code */
3096 PERL_ARGS_ASSERT_MORESWITCHES;
3104 SvREFCNT_dec(PL_rs);
3105 if (s[1] == 'x' && s[2]) {
3106 const char *e = s+=2;
3112 flags = PERL_SCAN_SILENT_ILLDIGIT;
3113 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3114 if (s + numlen < e) {
3115 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3119 PL_rs = newSVpvs("");
3120 SvGROW(PL_rs, (STRLEN)(UNISKIP(rschar) + 1));
3121 tmps = (U8*)SvPVX(PL_rs);
3122 uvchr_to_utf8(tmps, rschar);
3123 SvCUR_set(PL_rs, UNISKIP(rschar));
3128 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3129 if (rschar & ~((U8)~0))
3130 PL_rs = &PL_sv_undef;
3131 else if (!rschar && numlen >= 2)
3132 PL_rs = newSVpvs("");
3134 char ch = (char)rschar;
3135 PL_rs = newSVpvn(&ch, 1);
3138 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3143 PL_unicode = parse_unicode_opts( (const char **)&s );
3144 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3152 while (*s && !isSPACE(*s)) ++s;
3153 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3165 forbid_setid('d', FALSE);
3168 /* -dt indicates to the debugger that threads will be used */
3169 if (*s == 't' && !isWORDCHAR(s[1])) {
3171 my_setenv("PERL5DB_THREADED", "1");
3174 /* The following permits -d:Mod to accepts arguments following an =
3175 in the fashion that -MSome::Mod does. */
3176 if (*s == ':' || *s == '=') {
3183 sv = newSVpvs("no Devel::");
3185 sv = newSVpvs("use Devel::");
3189 end = s + strlen(s);
3191 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3192 while(isWORDCHAR(*s) || *s==':') ++s;
3194 sv_catpvn(sv, start, end - start);
3196 sv_catpvn(sv, start, s-start);
3197 /* Don't use NUL as q// delimiter here, this string goes in the
3199 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3202 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3206 PL_perldb = PERLDB_ALL;
3213 forbid_setid('D', FALSE);
3215 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3216 #else /* !DEBUGGING */
3217 if (ckWARN_d(WARN_DEBUGGING))
3218 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3219 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3220 for (s++; isWORDCHAR(*s); s++) ;
3227 Safefree(PL_inplace);
3228 #if defined(__CYGWIN__) /* do backup extension automagically */
3229 if (*(s+1) == '\0') {
3230 PL_inplace = savepvs(".bak");
3233 #endif /* __CYGWIN__ */
3235 const char * const start = ++s;
3236 while (*s && !isSPACE(*s))
3239 PL_inplace = savepvn(start, s - start);
3243 if (*s == '-') /* Additional switches on #! line. */
3247 case 'I': /* -I handled both here and in parse_body() */
3248 forbid_setid('I', FALSE);
3250 while (*s && isSPACE(*s))
3255 /* ignore trailing spaces (possibly followed by other switches) */
3257 for (e = p; *e && !isSPACE(*e); e++) ;
3261 } while (*p && *p != '-');
3263 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3269 Perl_croak(aTHX_ "No directory specified for -I");
3275 SvREFCNT_dec(PL_ors_sv);
3281 PL_ors_sv = newSVpvs("\n");
3282 numlen = 3 + (*s == '0');
3283 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3287 if (RsPARA(PL_rs)) {
3288 PL_ors_sv = newSVpvs("\n\n");
3291 PL_ors_sv = newSVsv(PL_rs);
3296 forbid_setid('M', FALSE); /* XXX ? */
3299 forbid_setid('m', FALSE); /* XXX ? */
3304 const char *use = "use ";
3306 /* -M-foo == 'no foo' */
3307 /* Leading space on " no " is deliberate, to make both
3308 possibilities the same length. */
3309 if (*s == '-') { use = " no "; ++s; }
3310 sv = newSVpvn(use,4);
3312 /* We allow -M'Module qw(Foo Bar)' */
3313 while(isWORDCHAR(*s) || *s==':') {
3322 Perl_croak(aTHX_ "Module name required with -%c option",
3325 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3326 "contains single ':'",
3327 (int)(s - start), start, option);
3328 end = s + strlen(s);
3330 sv_catpvn(sv, start, end - start);
3331 if (option == 'm') {
3333 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3334 sv_catpvs( sv, " ()");
3337 sv_catpvn(sv, start, s-start);
3338 /* Use NUL as q''-delimiter. */
3339 sv_catpvs(sv, " split(/,/,q\0");
3341 sv_catpvn(sv, s, end - s);
3342 sv_catpvs(sv, "\0)");
3345 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3348 Perl_croak(aTHX_ "Missing argument to -%c", option);
3359 forbid_setid('s', FALSE);
3360 PL_doswitches = TRUE;
3365 #if SILENT_NO_TAINT_SUPPORT
3366 /* silently ignore */
3367 #elif NO_TAINT_SUPPORT
3368 Perl_croak_nocontext("This perl was compiled without taint support. "
3369 "Cowardly refusing to run with -t or -T flags");
3377 PL_do_undump = TRUE;
3387 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3388 PL_dowarn |= G_WARN_ON;
3393 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3394 if (!specialWARN(PL_compiling.cop_warnings))
3395 PerlMemShared_free(PL_compiling.cop_warnings);
3396 PL_compiling.cop_warnings = pWARN_ALL ;
3400 PL_dowarn = G_WARN_ALL_OFF;
3401 if (!specialWARN(PL_compiling.cop_warnings))
3402 PerlMemShared_free(PL_compiling.cop_warnings);
3403 PL_compiling.cop_warnings = pWARN_NONE ;
3410 if (s[0] == '-') /* Additional switches on #! line. */
3415 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3421 #ifdef ALTERNATE_SHEBANG
3422 case 'S': /* OS/2 needs -S on "extproc" line. */
3425 case 'e': case 'f': case 'x': case 'E':
3426 #ifndef ALTERNATE_SHEBANG
3430 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3433 "Unrecognized switch: -%.1s (-h will show valid options)",s
3443 PerlIO * PIO_stdout;
3445 const char * const level_str = "v" PERL_VERSION_STRING;
3446 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3447 #ifdef PERL_PATCHNUM
3449 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3450 static const char num [] = PERL_PATCHNUM "*";
3452 static const char num [] = PERL_PATCHNUM;
3455 const STRLEN num_len = sizeof(num)-1;
3456 /* A very advanced compiler would fold away the strnEQ
3457 and this whole conditional, but most (all?) won't do it.
3458 SV level could also be replaced by with preprocessor
3461 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3462 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3463 of the interp so it might contain format characters
3465 level = newSVpvn(num, num_len);
3467 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3471 SV* level = newSVpvn(level_str, level_len);
3472 #endif /* #ifdef PERL_PATCHNUM */
3473 PIO_stdout = PerlIO_stdout();
3474 PerlIO_printf(PIO_stdout,
3475 "\nThis is perl " STRINGIFY(PERL_REVISION)
3476 ", version " STRINGIFY(PERL_VERSION)
3477 ", subversion " STRINGIFY(PERL_SUBVERSION)
3478 " (%"SVf") built for " ARCHNAME, level
3480 SvREFCNT_dec_NN(level);
3482 #if defined(LOCAL_PATCH_COUNT)
3483 if (LOCAL_PATCH_COUNT > 0)
3484 PerlIO_printf(PIO_stdout,
3485 "\n(with %d registered patch%s, "
3486 "see perl -V for more detail)",
3488 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3491 PerlIO_printf(PIO_stdout,
3492 "\n\nCopyright 1987-2013, Larry Wall\n");
3494 PerlIO_printf(PIO_stdout,
3495 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3498 PerlIO_printf(PIO_stdout,
3499 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3500 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3503 PerlIO_printf(PIO_stdout,
3504 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3505 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3508 PerlIO_printf(PIO_stdout,
3509 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3512 PerlIO_printf(PIO_stdout,
3513 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3516 PerlIO_printf(PIO_stdout,
3517 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3520 PerlIO_printf(PIO_stdout,
3521 "WINCE port by Rainer Keuchel, 2001-2002\n"
3522 "Built on " __DATE__ " " __TIME__ "\n\n");
3525 #ifdef __SYMBIAN32__
3526 PerlIO_printf(PIO_stdout,
3527 "Symbian port by Nokia, 2004-2005\n");
3529 #ifdef BINARY_BUILD_NOTICE
3530 BINARY_BUILD_NOTICE;
3532 PerlIO_printf(PIO_stdout,
3534 Perl may be copied only under the terms of either the Artistic License or the\n\
3535 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3536 Complete documentation for Perl, including FAQ lists, should be found on\n\
3537 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3538 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3542 /* compliments of Tom Christiansen */
3544 /* unexec() can be found in the Gnu emacs distribution */
3545 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3548 #include <lib$routines.h>
3552 Perl_my_unexec(pTHX)
3554 PERL_UNUSED_CONTEXT;
3556 SV * prog = newSVpv(BIN_EXP, 0);
3557 SV * file = newSVpv(PL_origfilename, 0);
3561 sv_catpvs(prog, "/perl");
3562 sv_catpvs(file, ".perldump");
3564 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3565 /* unexec prints msg to stderr in case of failure */
3566 PerlProc_exit(status);
3569 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3570 # elif defined(WIN32) || defined(__CYGWIN__)
3571 Perl_croak(aTHX_ "dump is not supported");
3573 ABORT(); /* for use with undump */
3578 /* initialize curinterp */
3584 # define PERLVAR(prefix,var,type)
3585 # define PERLVARA(prefix,var,n,type)
3586 # if defined(PERL_IMPLICIT_CONTEXT)
3587 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3588 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3590 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3591 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3593 # include "intrpvar.h"
3599 # define PERLVAR(prefix,var,type)
3600 # define PERLVARA(prefix,var,n,type)
3601 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3602 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3603 # include "intrpvar.h"
3613 S_init_main_stash(pTHX)
3618 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3619 /* We know that the string "main" will be in the global shared string
3620 table, so it's a small saving to use it rather than allocate another
3622 PL_curstname = newSVpvs_share("main");
3623 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3624 /* If we hadn't caused another reference to "main" to be in the shared
3625 string table above, then it would be worth reordering these two,
3626 because otherwise all we do is delete "main" from it as a consequence
3627 of the SvREFCNT_dec, only to add it again with hv_name_set */
3628 SvREFCNT_dec(GvHV(gv));
3629 hv_name_set(PL_defstash, "main", 4, 0);
3630 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3632 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3634 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3635 GvMULTI_on(PL_incgv);
3636 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3637 SvREFCNT_inc_simple_void(PL_hintgv);
3638 GvMULTI_on(PL_hintgv);
3639 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3640 SvREFCNT_inc_simple_void(PL_defgv);
3641 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3642 SvREFCNT_inc_simple_void(PL_errgv);
3643 GvMULTI_on(PL_errgv);
3644 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3645 SvREFCNT_inc_simple_void(PL_replgv);
3646 GvMULTI_on(PL_replgv);
3647 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3648 #ifdef PERL_DONT_CREATE_GVSV
3651 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3653 SET_CURSTASH(PL_defstash);
3654 CopSTASH_set(&PL_compiling, PL_defstash);
3655 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3656 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3658 /* We must init $/ before switches are processed. */
3659 sv_setpvs(get_sv("/", GV_ADD), "\n");
3663 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3666 PerlIO *rsfp = NULL;
3670 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3673 PL_origfilename = savepvs("-e");
3676 /* if find_script() returns, it returns a malloc()-ed value */
3677 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3679 if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
3680 const char *s = scriptname + 8;
3686 * Tell apart "normal" usage of fdscript, e.g.
3687 * with bash on FreeBSD:
3688 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3689 * from usage in suidperl.
3690 * Does any "normal" usage leave garbage after the number???
3691 * Is it a mistake to use a similar /dev/fd/ construct for
3696 * Be supersafe and do some sanity-checks.
3697 * Still, can we be sure we got the right thing?
3700 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3703 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3705 scriptname = savepv(s + 1);
3706 Safefree(PL_origfilename);
3707 PL_origfilename = (char *)scriptname;
3712 CopFILE_free(PL_curcop);
3713 CopFILE_set(PL_curcop, PL_origfilename);
3714 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3715 scriptname = (char *)"";
3716 if (fdscript >= 0) {
3717 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3719 else if (!*scriptname) {
3720 forbid_setid(0, *suidscript);
3724 #ifdef FAKE_BIT_BUCKET
3725 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3726 * is called) and still have the "-e" work. (Believe it or not,
3727 * a /dev/null is required for the "-e" to work because source
3728 * filter magic is used to implement it. ) This is *not* a general
3729 * replacement for a /dev/null. What we do here is create a temp
3730 * file (an empty file), open up that as the script, and then
3731 * immediately close and unlink it. Close enough for jazz. */
3732 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3733 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3734 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3735 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3736 FAKE_BIT_BUCKET_TEMPLATE
3738 const char * const err = "Failed to create a fake bit bucket";
3739 if (strEQ(scriptname, BIT_BUCKET)) {
3740 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3741 int tmpfd = mkstemp(tmpname);
3743 scriptname = tmpname;
3746 Perl_croak(aTHX_ err);
3749 scriptname = mktemp(tmpname);
3751 Perl_croak(aTHX_ err);
3756 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3757 #ifdef FAKE_BIT_BUCKET
3758 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3759 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3760 && strlen(scriptname) == sizeof(tmpname) - 1) {
3763 scriptname = BIT_BUCKET;
3767 /* PSz 16 Sep 03 Keep neat error message */
3769 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3771 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3772 CopFILE(PL_curcop), Strerror(errno));
3774 #if defined(HAS_FCNTL) && defined(F_SETFD)
3775 /* ensure close-on-exec */
3776 fcntl(PerlIO_fileno(rsfp), F_SETFD, 1);
3779 if (PerlLIO_fstat(PerlIO_fileno(rsfp), &tmpstatbuf) >= 0
3780 && S_ISDIR(tmpstatbuf.st_mode))
3781 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3789 * I_SYSSTATVFS HAS_FSTATVFS
3791 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3792 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3793 * here so that metaconfig picks them up. */
3796 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3797 /* Don't even need this function. */
3800 S_validate_suid(pTHX_ PerlIO *rsfp)
3802 const Uid_t my_uid = PerlProc_getuid();
3803 const Uid_t my_euid = PerlProc_geteuid();
3804 const Gid_t my_gid = PerlProc_getgid();
3805 const Gid_t my_egid = PerlProc_getegid();
3807 PERL_ARGS_ASSERT_VALIDATE_SUID;
3809 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3812 PerlLIO_fstat(PerlIO_fileno(rsfp),&PL_statbuf); /* may be either wrapped or real suid */
3813 if ((my_euid != my_uid && my_euid == PL_statbuf.st_uid && PL_statbuf.st_mode & S_ISUID)
3815 (my_egid != my_gid && my_egid == PL_statbuf.st_gid && PL_statbuf.st_mode & S_ISGID)
3818 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3819 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3820 /* not set-id, must be wrapped */
3823 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3826 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3832 PERL_ARGS_ASSERT_FIND_BEGINNING;
3834 /* skip forward in input to the real script? */
3837 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3838 Perl_croak(aTHX_ "No Perl script found in input\n");
3840 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3841 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3842 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3844 while (*s == ' ' || *s == '\t') s++;
3846 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3847 || s2[-1] == '_') s2--;
3848 if (strnEQ(s2-4,"perl",4))
3849 while ((s = moreswitches(s)))
3858 /* no need to do anything here any more if we don't
3860 #if !NO_TAINT_SUPPORT
3862 const Uid_t my_uid = PerlProc_getuid();
3863 const Uid_t my_euid = PerlProc_geteuid();
3864 const Gid_t my_gid = PerlProc_getgid();
3865 const Gid_t my_egid = PerlProc_getegid();
3867 /* Should not happen: */
3868 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3869 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
3873 * Should go by suidscript, not uid!=euid: why disallow
3874 * system("ls") in scripts run from setuid things?
3875 * Or, is this run before we check arguments and set suidscript?
3876 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3877 * (We never have suidscript, can we be sure to have fdscript?)
3878 * Or must then go by UID checks? See comments in forbid_setid also.
3882 /* This is used very early in the lifetime of the program,
3883 * before even the options are parsed, so PL_tainting has
3884 * not been initialized properly. */
3886 Perl_doing_taint(int argc, char *argv[], char *envp[])
3888 #ifndef PERL_IMPLICIT_SYS
3889 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
3890 * before we have an interpreter-- and the whole point of this
3891 * function is to be called at such an early stage. If you are on
3892 * a system with PERL_IMPLICIT_SYS but you do have a concept of
3893 * "tainted because running with altered effective ids', you'll
3894 * have to add your own checks somewhere in here. The two most
3895 * known samples of 'implicitness' are Win32 and NetWare, neither
3896 * of which has much of concept of 'uids'. */
3897 Uid_t uid = PerlProc_getuid();
3898 Uid_t euid = PerlProc_geteuid();
3899 Gid_t gid = PerlProc_getgid();
3900 Gid_t egid = PerlProc_getegid();
3907 if (uid && (euid != uid || egid != gid))
3909 #endif /* !PERL_IMPLICIT_SYS */
3910 /* This is a really primitive check; environment gets ignored only
3911 * if -T are the first chars together; otherwise one gets
3912 * "Too late" message. */
3913 if ( argc > 1 && argv[1][0] == '-'
3914 && (argv[1][1] == 't' || argv[1][1] == 'T') )
3919 /* Passing the flag as a single char rather than a string is a slight space
3920 optimisation. The only message that isn't /^-.$/ is
3921 "program input from stdin", which is substituted in place of '\0', which
3922 could never be a command line flag. */
3924 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
3927 char string[3] = "-x";
3928 const char *message = "program input from stdin";
3935 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3936 if (PerlProc_getuid() != PerlProc_geteuid())
3937 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
3938 if (PerlProc_getgid() != PerlProc_getegid())
3939 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
3940 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3942 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
3946 Perl_init_dbargs(pTHX)
3948 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
3953 /* Someone has already created it.
3954 It might have entries, and if we just turn off AvREAL(), they will
3955 "leak" until global destruction. */
3957 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
3958 Perl_croak(aTHX_ "Cannot set tied @DB::args");
3960 AvREIFY_only(PL_dbargs);
3964 Perl_init_debugger(pTHX)
3967 HV * const ostash = PL_curstash;
3969 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
3971 Perl_init_dbargs(aTHX);
3972 PL_DBgv = MUTABLE_GV(
3973 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
3975 PL_DBline = MUTABLE_GV(
3976 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
3978 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
3979 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
3981 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
3982 if (!SvIOK(PL_DBsingle))
3983 sv_setiv(PL_DBsingle, 0);
3984 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
3985 if (!SvIOK(PL_DBtrace))
3986 sv_setiv(PL_DBtrace, 0);
3987 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
3988 if (!SvIOK(PL_DBsignal))
3989 sv_setiv(PL_DBsignal, 0);
3990 SvREFCNT_dec(PL_curstash);
3991 PL_curstash = ostash;
3994 #ifndef STRESS_REALLOC
3995 #define REASONABLE(size) (size)
3996 #define REASONABLE_but_at_least(size,min) (size)
3998 #define REASONABLE(size) (1) /* unreasonable */
3999 #define REASONABLE_but_at_least(size,min) (min)
4003 Perl_init_stacks(pTHX)
4006 /* start with 128-item stack and 8K cxstack */
4007 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4008 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4009 PL_curstackinfo->si_type = PERLSI_MAIN;
4010 PL_curstack = PL_curstackinfo->si_stack;
4011 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4013 PL_stack_base = AvARRAY(PL_curstack);
4014 PL_stack_sp = PL_stack_base;
4015 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4017 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4020 PL_tmps_max = REASONABLE(128);
4022 Newx(PL_markstack,REASONABLE(32),I32);
4023 PL_markstack_ptr = PL_markstack;
4024 PL_markstack_max = PL_markstack + REASONABLE(32);
4028 Newx(PL_scopestack,REASONABLE(32),I32);
4030 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4032 PL_scopestack_ix = 0;
4033 PL_scopestack_max = REASONABLE(32);
4035 Newx(PL_savestack,REASONABLE_but_at_least(128,SS_MAXPUSH),ANY);
4036 PL_savestack_ix = 0;
4037 PL_savestack_max = REASONABLE_but_at_least(128,SS_MAXPUSH);
4046 while (PL_curstackinfo->si_next)
4047 PL_curstackinfo = PL_curstackinfo->si_next;
4048 while (PL_curstackinfo) {
4049 PERL_SI *p = PL_curstackinfo->si_prev;
4050 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4051 Safefree(PL_curstackinfo->si_cxstack);
4052 Safefree(PL_curstackinfo);
4053 PL_curstackinfo = p;
4055 Safefree(PL_tmps_stack);
4056 Safefree(PL_markstack);
4057 Safefree(PL_scopestack);
4059 Safefree(PL_scopestack_name);
4061 Safefree(PL_savestack);
4065 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4067 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4068 AV *const isa = GvAVn(gv);
4071 PERL_ARGS_ASSERT_POPULATE_ISA;
4073 if(AvFILLp(isa) != -1)
4076 /* NOTE: No support for tied ISA */
4078 va_start(args, len);
4080 const char *const parent = va_arg(args, const char*);
4085 parent_len = va_arg(args, size_t);
4087 /* Arguments are supplied with a trailing :: */
4088 assert(parent_len > 2);
4089 assert(parent[parent_len - 1] == ':');
4090 assert(parent[parent_len - 2] == ':');
4091 av_push(isa, newSVpvn(parent, parent_len - 2));
4092 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4099 S_init_predump_symbols(pTHX)
4105 sv_setpvs(get_sv("\"", GV_ADD), " ");
4106 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4109 /* Historically, PVIOs were blessed into IO::Handle, unless
4110 FileHandle was loaded, in which case they were blessed into
4111 that. Action at a distance.
4112 However, if we simply bless into IO::Handle, we break code
4113 that assumes that PVIOs will have (among others) a seek
4114 method. IO::File inherits from IO::Handle and IO::Seekable,
4115 and provides the needed methods. But if we simply bless into
4116 it, then we break code that assumed that by loading
4117 IO::Handle, *it* would work.
4118 So a compromise is to set up the correct @IO::File::ISA,
4119 so that code that does C<use IO::Handle>; will still work.
4122 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4123 STR_WITH_LEN("IO::Handle::"),
4124 STR_WITH_LEN("IO::Seekable::"),
4125 STR_WITH_LEN("Exporter::"),
4128 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4129 GvMULTI_on(PL_stdingv);
4130 io = GvIOp(PL_stdingv);
4131 IoTYPE(io) = IoTYPE_RDONLY;
4132 IoIFP(io) = PerlIO_stdin();
4133 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4135 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4137 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4140 IoTYPE(io) = IoTYPE_WRONLY;
4141 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4143 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4145 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4147 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4148 GvMULTI_on(PL_stderrgv);
4149 io = GvIOp(PL_stderrgv);
4150 IoTYPE(io) = IoTYPE_WRONLY;
4151 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4152 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4154 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4156 PL_statname = newSVpvs(""); /* last filename we did stat on */
4160 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4164 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4166 argc--,argv++; /* skip name of script */
4167 if (PL_doswitches) {
4168 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4172 if (argv[0][1] == '-' && !argv[0][2]) {
4176 if ((s = strchr(argv[0], '='))) {
4177 const char *const start_name = argv[0] + 1;
4178 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4179 TRUE, SVt_PV)), s + 1);
4182 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4185 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4186 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4187 GvMULTI_on(PL_argvgv);
4188 av_clear(GvAVn(PL_argvgv));
4189 for (; argc > 0; argc--,argv++) {
4190 SV * const sv = newSVpv(argv[0],0);
4191 av_push(GvAV(PL_argvgv),sv);
4192 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4193 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4196 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4197 (void)sv_utf8_decode(sv);
4201 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4202 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4203 "-i used with no filenames on the command line, "
4204 "reading from STDIN");
4208 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4213 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4215 PL_toptarget = newSV_type(SVt_PVIV);
4216 sv_setpvs(PL_toptarget, "");
4217 PL_bodytarget = newSV_type(SVt_PVIV);
4218 sv_setpvs(PL_bodytarget, "");
4219 PL_formtarget = PL_bodytarget;
4223 init_argv_symbols(argc,argv);
4225 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4226 sv_setpv(GvSV(tmpgv),PL_origfilename);
4228 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4230 bool env_is_not_environ;
4231 SvREFCNT_inc_simple_void_NN(PL_envgv);
4232 GvMULTI_on(PL_envgv);
4233 hv = GvHVn(PL_envgv);
4234 hv_magic(hv, NULL, PERL_MAGIC_env);
4236 #ifdef USE_ENVIRON_ARRAY
4237 /* Note that if the supplied env parameter is actually a copy
4238 of the global environ then it may now point to free'd memory
4239 if the environment has been modified since. To avoid this
4240 problem we treat env==NULL as meaning 'use the default'
4244 env_is_not_environ = env != environ;
4245 if (env_is_not_environ
4246 # ifdef USE_ITHREADS
4247 && PL_curinterp == aTHX
4256 for (; *env; env++) {
4259 if (!(s = strchr(old_var,'=')) || s == old_var)
4262 #if defined(MSDOS) && !defined(DJGPP)
4264 (void)strupr(old_var);
4267 sv = newSVpv(s+1, 0);
4268 (void)hv_store(hv, old_var, s - old_var, sv, 0);
4269 if (env_is_not_environ)
4273 #endif /* USE_ENVIRON_ARRAY */
4274 #endif /* !PERL_MICRO */
4278 /* touch @F array to prevent spurious warnings 20020415 MJD */
4280 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4285 S_init_perllib(pTHX)
4289 const char *perl5lib = NULL;
4292 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4296 if (!TAINTING_get) {
4298 perl5lib = PerlEnv_getenv("PERL5LIB");
4300 * It isn't possible to delete an environment variable with
4301 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4302 * case we treat PERL5LIB as undefined if it has a zero-length value.
4304 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4305 if (perl5lib && *perl5lib != '\0')
4309 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4311 s = PerlEnv_getenv("PERLLIB");
4313 incpush_use_sep(s, 0, 0);
4316 /* Treat PERL5?LIB as a possible search list logical name -- the
4317 * "natural" VMS idiom for a Unix path string. We allow each
4318 * element to be a set of |-separated directories for compatibility.
4322 if (my_trnlnm("PERL5LIB",buf,0))
4324 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4325 } while (my_trnlnm("PERL5LIB",buf,++idx));
4327 while (my_trnlnm("PERLLIB",buf,idx++))
4328 incpush_use_sep(buf, 0, 0);
4333 #ifndef PERL_IS_MINIPERL
4334 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4335 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4337 /* Use the ~-expanded versions of APPLLIB (undocumented),
4338 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4341 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4342 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4346 /* sitearch is always relative to sitelib on Windows for
4347 * DLL-based path intuition to work correctly */
4348 # if !defined(WIN32)
4349 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4350 INCPUSH_CAN_RELOCATE);
4356 /* this picks up sitearch as well */
4357 s = win32_get_sitelib(PERL_FS_VERSION, &len);
4359 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4361 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4365 #ifdef PERL_VENDORARCH_EXP
4366 /* vendorarch is always relative to vendorlib on Windows for
4367 * DLL-based path intuition to work correctly */
4368 # if !defined(WIN32)
4369 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4370 INCPUSH_CAN_RELOCATE);
4374 #ifdef PERL_VENDORLIB_EXP
4376 /* this picks up vendorarch as well */
4377 s = win32_get_vendorlib(PERL_FS_VERSION, &len);
4379 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4381 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4382 INCPUSH_CAN_RELOCATE);
4387 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4391 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4395 s = win32_get_privlib(PERL_FS_VERSION, &len);
4397 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4400 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4402 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4406 #ifdef PERL_OTHERLIBDIRS
4407 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4408 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4409 |INCPUSH_CAN_RELOCATE);
4412 if (!TAINTING_get) {
4415 * It isn't possible to delete an environment variable with
4416 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4417 * case we treat PERL5LIB as undefined if it has a zero-length value.
4419 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4420 if (perl5lib && *perl5lib != '\0')
4424 incpush_use_sep(perl5lib, 0,
4425 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4427 /* Treat PERL5?LIB as a possible search list logical name -- the
4428 * "natural" VMS idiom for a Unix path string. We allow each
4429 * element to be a set of |-separated directories for compatibility.
4433 if (my_trnlnm("PERL5LIB",buf,0))
4435 incpush_use_sep(buf, 0,
4436 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4437 } while (my_trnlnm("PERL5LIB",buf,++idx));
4441 /* Use the ~-expanded versions of APPLLIB (undocumented),
4442 SITELIB and VENDORLIB for older versions
4445 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4446 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4449 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4450 /* Search for version-specific dirs below here */
4451 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4452 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4456 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4457 /* Search for version-specific dirs below here */
4458 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4459 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4462 #ifdef PERL_OTHERLIBDIRS
4463 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4464 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4465 |INCPUSH_CAN_RELOCATE);
4467 #endif /* !PERL_IS_MINIPERL */
4470 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4473 #if defined(DOSISH) || defined(__SYMBIAN32__)
4474 # define PERLLIB_SEP ';'
4477 # define PERLLIB_SEP '|'
4479 # define PERLLIB_SEP ':'
4482 #ifndef PERLLIB_MANGLE
4483 # define PERLLIB_MANGLE(s,n) (s)
4486 #ifndef PERL_IS_MINIPERL
4487 /* Push a directory onto @INC if it exists.
4488 Generate a new SV if we do this, to save needing to copy the SV we push
4491 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4496 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4498 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4499 S_ISDIR(tmpstatbuf.st_mode)) {
4501 dir = newSVsv(stem);
4503 /* Truncate dir back to stem. */
4504 SvCUR_set(dir, SvCUR(stem));
4511 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4513 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4516 PERL_ARGS_ASSERT_MAYBERELOCATE;
4519 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4520 defined to so something (in os2/os2.c), but the code has been
4521 this way, ignoring any possible changed of length, since
4522 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4524 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4530 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4532 while (unix[len-1] == '/') len--; /* Cosmetic */
4533 sv_usepvn(libdir,unix,len);
4536 PerlIO_printf(Perl_error_log,
4537 "Failed to unixify @INC element \"%s\"\n",
4538 SvPV_nolen_const(libdir));
4542 /* Do the if() outside the #ifdef to avoid warnings about an unused
4545 #ifdef PERL_RELOCATABLE_INC
4547 * Relocatable include entries are marked with a leading .../
4550 * 0: Remove that leading ".../"
4551 * 1: Remove trailing executable name (anything after the last '/')
4552 * from the perl path to give a perl prefix
4554 * While the @INC element starts "../" and the prefix ends with a real
4555 * directory (ie not . or ..) chop that real directory off the prefix
4556 * and the leading "../" from the @INC element. ie a logical "../"
4558 * Finally concatenate the prefix and the remainder of the @INC element
4559 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4560 * generates /usr/local/lib/perl5
4562 const char *libpath = SvPVX(libdir);
4563 STRLEN libpath_len = SvCUR(libdir);
4564 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4566 SV * const caret_X = get_sv("\030", 0);
4567 /* Going to use the SV just as a scratch buffer holding a C
4573 /* $^X is *the* source of taint if tainting is on, hence
4574 SvPOK() won't be true. */
4576 assert(SvPOKp(caret_X));
4577 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4579 /* Firstly take off the leading .../
4580 If all else fail we'll do the paths relative to the current
4582 sv_chop(libdir, libpath + 4);
4583 /* Don't use SvPV as we're intentionally bypassing taining,
4584 mortal copies that the mg_get of tainting creates, and
4585 corruption that seems to come via the save stack.
4586 I guess that the save stack isn't correctly set up yet. */
4587 libpath = SvPVX(libdir);
4588 libpath_len = SvCUR(libdir);
4590 /* This would work more efficiently with memrchr, but as it's
4591 only a GNU extension we'd need to probe for it and
4592 implement our own. Not hard, but maybe not worth it? */
4594 prefix = SvPVX(prefix_sv);
4595 lastslash = strrchr(prefix, '/');
4597 /* First time in with the *lastslash = '\0' we just wipe off
4598 the trailing /perl from (say) /usr/foo/bin/perl
4602 while ((*lastslash = '\0'), /* Do that, come what may. */
4603 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4604 && (lastslash = strrchr(prefix, '/')))) {
4605 if (lastslash[1] == '\0'
4606 || (lastslash[1] == '.'
4607 && (lastslash[2] == '/' /* ends "/." */
4608 || (lastslash[2] == '/'
4609 && lastslash[3] == '/' /* or "/.." */
4611 /* Prefix ends "/" or "/." or "/..", any of which
4612 are fishy, so don't do any more logical cleanup.
4616 /* Remove leading "../" from path */
4619 /* Next iteration round the loop removes the last
4620 directory name from prefix by writing a '\0' in
4621 the while clause. */
4623 /* prefix has been terminated with a '\0' to the correct
4624 length. libpath points somewhere into the libdir SV.
4625 We need to join the 2 with '/' and drop the result into
4627 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4628 SvREFCNT_dec(libdir);
4629 /* And this is the new libdir. */
4632 (PerlProc_getuid() != PerlProc_geteuid() ||
4633 PerlProc_getgid() != PerlProc_getegid())) {
4634 /* Need to taint relocated paths if running set ID */
4635 SvTAINTED_on(libdir);
4638 SvREFCNT_dec(prefix_sv);
4646 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4649 #ifndef PERL_IS_MINIPERL
4650 const U8 using_sub_dirs
4651 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4652 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4653 const U8 add_versioned_sub_dirs
4654 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4655 const U8 add_archonly_sub_dirs
4656 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4657 #ifdef PERL_INC_VERSION_LIST
4658 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4661 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4662 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4663 AV *const inc = GvAVn(PL_incgv);
4665 PERL_ARGS_ASSERT_INCPUSH;
4668 /* Could remove this vestigial extra block, if we don't mind a lot of
4669 re-indenting diff noise. */
4671 SV *const libdir = mayberelocate(dir, len, flags);
4672 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4673 arranged to unshift #! line -I onto the front of @INC. However,
4674 -I can add version and architecture specific libraries, and they
4675 need to go first. The old code assumed that it was always
4676 pushing. Hence to make it work, need to push the architecture
4677 (etc) libraries onto a temporary array, then "unshift" that onto
4678 the front of @INC. */
4679 #ifndef PERL_IS_MINIPERL
4680 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4683 * BEFORE pushing libdir onto @INC we may first push version- and
4684 * archname-specific sub-directories.
4686 if (using_sub_dirs) {
4687 SV *subdir = newSVsv(libdir);
4688 #ifdef PERL_INC_VERSION_LIST
4689 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4690 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4691 const char * const *incver;
4694 if (add_versioned_sub_dirs) {
4695 /* .../version/archname if -d .../version/archname */
4696 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4697 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4699 /* .../version if -d .../version */
4700 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4701 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4704 #ifdef PERL_INC_VERSION_LIST
4706 for (incver = incverlist; *incver; incver++) {
4707 /* .../xxx if -d .../xxx */
4708 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4709 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4714 if (add_archonly_sub_dirs) {
4715 /* .../archname if -d .../archname */
4716 sv_catpvs(subdir, "/" ARCHNAME);
4717 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4721 assert (SvREFCNT(subdir) == 1);
4722 SvREFCNT_dec(subdir);
4724 #endif /* !PERL_IS_MINIPERL */
4725 /* finally add this lib directory at the end of @INC */
4727 #ifdef PERL_IS_MINIPERL
4728 const Size_t extra = 0;
4730 Size_t extra = av_len(av) + 1;
4732 av_unshift(inc, extra + push_basedir);
4734 av_store(inc, extra, libdir);
4735 #ifndef PERL_IS_MINIPERL
4737 /* av owns a reference, av_store() expects to be donated a
4738 reference, and av expects to be sane when it's cleared.
4739 If I wanted to be naughty and wrong, I could peek inside the
4740 implementation of av_clear(), realise that it uses
4741 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4742 and so directly steal from it (with a memcpy() to inc, and
4743 then memset() to NULL them out. But people copy code from the
4744 core expecting it to be best practise, so let's use the API.
4745 Although studious readers will note that I'm not checking any
4747 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4752 else if (push_basedir) {
4753 av_push(inc, libdir);
4756 if (!push_basedir) {
4757 assert (SvREFCNT(libdir) == 1);
4758 SvREFCNT_dec(libdir);
4764 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4768 /* This logic has been broken out from S_incpush(). It may be possible to
4771 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4773 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4774 * argument to incpush_use_sep. This allows creation of relocatable
4775 * Perl distributions that patch the binary at install time. Those
4776 * distributions will have to provide their own relocation tools; this
4777 * is not a feature otherwise supported by core Perl.
4779 #ifndef PERL_RELOCATABLE_INCPUSH
4786 /* Break at all separators */
4787 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4789 /* skip any consecutive separators */
4791 /* Uncomment the next line for PATH semantics */
4792 /* But you'll need to write tests */
4793 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4795 incpush(p, (STRLEN)(s - p), flags);
4800 incpush(p, (STRLEN)(end - p), flags);
4805 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4809 volatile const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4815 PERL_ARGS_ASSERT_CALL_LIST;
4817 while (av_len(paramList) >= 0) {
4818 cv = MUTABLE_CV(av_shift(paramList));
4820 if (paramList == PL_beginav) {
4821 /* save PL_beginav for compiler */
4822 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
4824 else if (paramList == PL_checkav) {
4825 /* save PL_checkav for compiler */
4826 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
4828 else if (paramList == PL_unitcheckav) {
4829 /* save PL_unitcheckav for compiler */
4830 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
4841 PL_madskills |= 16384;
4846 PL_madskills &= ~16384;
4849 (void)SvPV_const(atsv, len);
4851 PL_curcop = &PL_compiling;
4852 CopLINE_set(PL_curcop, oldline);
4853 if (paramList == PL_beginav)
4854 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
4856 Perl_sv_catpvf(aTHX_ atsv,
4857 "%s failed--call queue aborted",
4858 paramList == PL_checkav ? "CHECK"
4859 : paramList == PL_initav ? "INIT"
4860 : paramList == PL_unitcheckav ? "UNITCHECK"
4862 while (PL_scopestack_ix > oldscope)
4865 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
4872 /* my_exit() was called */
4873 while (PL_scopestack_ix > oldscope)
4876 SET_CURSTASH(PL_defstash);
4877 PL_curcop = &PL_compiling;
4878 CopLINE_set(PL_curcop, oldline);
4881 assert(0); /* NOTREACHED */
4884 PL_curcop = &PL_compiling;
4885 CopLINE_set(PL_curcop, oldline);
4888 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
4897 Perl_my_exit(pTHX_ U32 status)
4900 if (PL_exit_flags & PERL_EXIT_ABORT) {
4903 if (PL_exit_flags & PERL_EXIT_WARN) {
4904 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
4905 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
4906 PL_exit_flags &= ~PERL_EXIT_ABORT;
4916 STATUS_EXIT_SET(status);
4923 Perl_my_failure_exit(pTHX)
4927 /* We have been called to fall on our sword. The desired exit code
4928 * should be already set in STATUS_UNIX, but could be shifted over
4929 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
4932 * If an error code has not been set, then force the issue.
4934 if (MY_POSIX_EXIT) {
4936 /* According to the die_exit.t tests, if errno is non-zero */
4937 /* It should be used for the error status. */
4939 if (errno == EVMSERR) {
4940 STATUS_NATIVE = vaxc$errno;
4943 /* According to die_exit.t tests, if the child_exit code is */
4944 /* also zero, then we need to exit with a code of 255 */
4945 if ((errno != 0) && (errno < 256))
4946 STATUS_UNIX_EXIT_SET(errno);
4947 else if (STATUS_UNIX < 255) {
4948 STATUS_UNIX_EXIT_SET(255);
4953 /* The exit code could have been set by $? or vmsish which
4954 * means that it may not have fatal set. So convert
4955 * success/warning codes to fatal with out changing
4956 * the POSIX status code. The severity makes VMS native
4957 * status handling work, while UNIX mode programs use the
4958 * the POSIX exit codes.
4960 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
4961 STATUS_NATIVE &= STS$M_COND_ID;
4962 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
4966 /* Traditionally Perl on VMS always expects a Fatal Error. */
4967 if (vaxc$errno & 1) {
4969 /* So force success status to failure */
4970 if (STATUS_NATIVE & 1)
4975 STATUS_UNIX = EINTR; /* In case something cares */
4980 STATUS_NATIVE = vaxc$errno; /* Should already be this */
4982 /* Encode the severity code */
4983 severity = STATUS_NATIVE & STS$M_SEVERITY;
4984 STATUS_UNIX = (severity ? severity : 1) << 8;
4986 /* Perl expects this to be a fatal error */
4987 if (severity != STS$K_SEVERE)
4996 STATUS_UNIX_SET(errno);
4998 exitstatus = STATUS_UNIX >> 8;
4999 if (exitstatus & 255)
5000 STATUS_UNIX_SET(exitstatus);
5002 STATUS_UNIX_SET(255);
5005 if (PL_exit_flags & PERL_EXIT_ABORT) {
5008 if (PL_exit_flags & PERL_EXIT_WARN) {
5009 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5010 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5011 PL_exit_flags &= ~PERL_EXIT_ABORT;
5017 S_my_exit_jump(pTHX)
5022 SvREFCNT_dec(PL_e_script);
5026 POPSTACK_TO(PL_mainstack);
5034 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5037 const char * const p = SvPVX_const(PL_e_script);
5038 const char *nl = strchr(p, '\n');
5040 PERL_UNUSED_ARG(idx);
5041 PERL_UNUSED_ARG(maxlen);
5043 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5045 filter_del(read_e_script);
5048 sv_catpvn(buf_sv, p, nl-p);
5049 sv_chop(PL_e_script, nl);
5055 * c-indentation-style: bsd
5057 * indent-tabs-mode: nil
5060 * ex: set ts=8 sts=4 sw=4 et: