4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * 2013, 2014, 2015, 2016 by Larry Wall and others
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
26 * Note that at build time this file is also linked to as perlmini.c,
27 * and perlmini.o is then built with PERL_IS_MINIPERL defined, which is
28 * then used to create the miniperl executable, rather than perl.o.
31 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
32 # define USE_SITECUSTOMIZE
36 #define PERL_IN_PERL_C
38 #include "patchlevel.h" /* for local_patches */
45 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
52 char control[CMSG_SPACE(sizeof(int))];
65 #if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
66 char *getenv (char *); /* Usually in <stdlib.h> */
69 static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
71 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
72 # define validate_suid(rsfp) NOOP
74 # define validate_suid(rsfp) S_validate_suid(aTHX_ rsfp)
77 #define CALL_BODY_SUB(myop) \
78 if (PL_op == (myop)) \
79 PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
83 #define CALL_LIST_BODY(cv) \
84 PUSHMARK(PL_stack_sp); \
85 call_sv(MUTABLE_SV((cv)), G_EVAL|G_DISCARD|G_VOID);
88 S_init_tls_and_interp(PerlInterpreter *my_perl)
92 PERL_SET_INTERP(my_perl);
93 #if defined(USE_ITHREADS)
96 PERL_SET_THX(my_perl);
101 MUTEX_INIT(&PL_dollarzero_mutex);
102 MUTEX_INIT(&PL_my_ctx_mutex);
105 #if defined(USE_ITHREADS)
108 /* This always happens for non-ithreads */
111 PERL_SET_THX(my_perl);
116 /* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
119 Perl_sys_init(int* argc, char*** argv)
123 PERL_ARGS_ASSERT_SYS_INIT;
125 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
126 PERL_UNUSED_ARG(argv);
127 PERL_SYS_INIT_BODY(argc, argv);
131 Perl_sys_init3(int* argc, char*** argv, char*** env)
135 PERL_ARGS_ASSERT_SYS_INIT3;
137 PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
138 PERL_UNUSED_ARG(argv);
139 PERL_UNUSED_ARG(env);
140 PERL_SYS_INIT3_BODY(argc, argv, env);
147 if (!PL_veto_cleanup) {
148 PERL_SYS_TERM_BODY();
153 #ifdef PERL_IMPLICIT_SYS
155 perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
156 struct IPerlMem* ipMP, struct IPerlEnv* ipE,
157 struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
158 struct IPerlDir* ipD, struct IPerlSock* ipS,
159 struct IPerlProc* ipP)
161 PerlInterpreter *my_perl;
163 PERL_ARGS_ASSERT_PERL_ALLOC_USING;
165 /* Newx() needs interpreter, so call malloc() instead */
166 my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
167 S_init_tls_and_interp(my_perl);
168 Zero(my_perl, 1, PerlInterpreter);
178 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
185 =head1 Embedding Functions
187 =for apidoc perl_alloc
189 Allocates a new Perl interpreter. See L<perlembed>.
197 PerlInterpreter *my_perl;
199 /* Newx() needs interpreter, so call malloc() instead */
200 my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
202 S_init_tls_and_interp(my_perl);
203 #ifndef PERL_TRACK_MEMPOOL
204 return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
206 Zero(my_perl, 1, PerlInterpreter);
207 INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
211 #endif /* PERL_IMPLICIT_SYS */
214 =for apidoc perl_construct
216 Initializes a new Perl interpreter. See L<perlembed>.
222 S_fixup_platform_bugs(void)
224 #if defined(__GLIBC__) && IVSIZE == 8 \
225 && ( __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 8))
229 /* Cannot do this check with inlined IV constants since
230 * that seems to work correctly even with the buggy glibc. */
233 /* Yikes, we have the bug.
234 * Patch in the workaround version. */
235 PL_ppaddr[OP_I_MODULO] = &Perl_pp_i_modulo_glibc_bugfix;
242 perl_construct(pTHXx)
246 PERL_ARGS_ASSERT_PERL_CONSTRUCT;
250 PL_perl_destruct_level = 1;
252 PERL_UNUSED_ARG(my_perl);
253 if (PL_perl_destruct_level > 0)
256 PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
258 #ifdef PERL_TRACE_OPS
259 Zero(PL_op_exec_cnt, OP_max+2, UV);
264 SvREADONLY_on(&PL_sv_placeholder);
265 SvREFCNT(&PL_sv_placeholder) = SvREFCNT_IMMORTAL;
267 PL_sighandlerp = (Sighandler_t) Perl_sighandler;
268 #ifdef PERL_USES_PL_PIDSTATUS
269 PL_pidstatus = newHV();
272 PL_rs = newSVpvs("\n");
278 S_fixup_platform_bugs();
285 #if defined(LOCAL_PATCH_COUNT)
286 PL_localpatches = local_patches; /* For possible -v */
289 #ifdef HAVE_INTERP_INTERN
293 PerlIO_init(aTHX); /* Hook to IO system */
295 PL_fdpid = newAV(); /* for remembering popen pids by fd */
296 PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
297 PL_errors = newSVpvs("");
298 sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
299 sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
300 sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
302 /* First entry is a list of empty elements. It needs to be initialised
303 else all hell breaks loose in S_find_uninit_var(). */
304 Perl_av_create_and_push(aTHX_ &PL_regex_padav, newSVpvs(""));
305 PL_regex_pad = AvARRAY(PL_regex_padav);
306 Newxz(PL_stashpad, PL_stashpadmax, HV *);
308 #ifdef USE_REENTRANT_API
309 Perl_reentrant_init(aTHX);
311 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT)
312 /* [perl #22371] Algorimic Complexity Attack on Perl 5.6.1, 5.8.0
313 * This MUST be done before any hash stores or fetches take place.
314 * If you set PL_hash_seed (and presumably also PL_hash_seed_set)
315 * yourself, it is your responsibility to provide a good random seed!
316 * You can also define PERL_HASH_SEED in compile time, see hv.h.
318 * XXX: fix this comment */
319 if (PL_hash_seed_set == FALSE) {
320 Perl_get_hash_seed(aTHX_ PL_hash_seed);
321 PL_hash_seed_set= TRUE;
323 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
325 /* Note that strtab is a rather special HV. Assumptions are made
326 about not iterating on it, and not adding tie magic to it.
327 It is properly deallocated in perl_destruct() */
330 HvSHAREKEYS_off(PL_strtab); /* mandatory */
331 hv_ksplit(PL_strtab, 512);
333 Zero(PL_sv_consts, SV_CONSTS_COUNT, SV*);
336 # ifdef USE_ENVIRON_ARRAY
337 PL_origenviron = environ;
341 /* Use sysconf(_SC_CLK_TCK) if available, if not
342 * available or if the sysconf() fails, use the HZ.
343 * The HZ if not originally defined has been by now
344 * been defined as CLK_TCK, if available. */
345 #if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK)
346 PL_clocktick = sysconf(_SC_CLK_TCK);
347 if (PL_clocktick <= 0)
351 PL_stashcache = newHV();
353 PL_patchlevel = newSVpvs("v" PERL_VERSION_STRING);
356 if (!PL_mmap_page_size) {
357 #if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
359 SETERRNO(0, SS_NORMAL);
361 PL_mmap_page_size = sysconf(_SC_PAGESIZE);
363 PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
365 if ((long) PL_mmap_page_size < 0) {
367 SV * const error = ERRSV;
368 SvUPGRADE(error, SVt_PV);
369 Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
372 Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
376 # ifdef HAS_GETPAGESIZE
377 PL_mmap_page_size = getpagesize();
379 # if defined(I_SYS_PARAM) && defined(PAGESIZE)
380 PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
384 if (PL_mmap_page_size <= 0)
385 Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
386 (IV) PL_mmap_page_size);
388 #endif /* HAS_MMAP */
390 #if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
391 PL_timesbase.tms_utime = 0;
392 PL_timesbase.tms_stime = 0;
393 PL_timesbase.tms_cutime = 0;
394 PL_timesbase.tms_cstime = 0;
397 PL_osname = Perl_savepvn(aTHX_ STR_WITH_LEN(OSNAME));
399 PL_registered_mros = newHV();
400 /* Start with 1 bucket, for DFS. It's unlikely we'll need more. */
401 HvMAX(PL_registered_mros) = 0;
403 PL_XPosix_ptrs[_CC_ASCII] = _new_invlist_C_array(ASCII_invlist);
404 PL_XPosix_ptrs[_CC_ALPHANUMERIC] = _new_invlist_C_array(XPosixAlnum_invlist);
405 PL_XPosix_ptrs[_CC_ALPHA] = _new_invlist_C_array(XPosixAlpha_invlist);
406 PL_XPosix_ptrs[_CC_BLANK] = _new_invlist_C_array(XPosixBlank_invlist);
407 PL_XPosix_ptrs[_CC_CASED] = _new_invlist_C_array(Cased_invlist);
408 PL_XPosix_ptrs[_CC_CNTRL] = _new_invlist_C_array(XPosixCntrl_invlist);
409 PL_XPosix_ptrs[_CC_DIGIT] = _new_invlist_C_array(XPosixDigit_invlist);
410 PL_XPosix_ptrs[_CC_GRAPH] = _new_invlist_C_array(XPosixGraph_invlist);
411 PL_XPosix_ptrs[_CC_LOWER] = _new_invlist_C_array(XPosixLower_invlist);
412 PL_XPosix_ptrs[_CC_PRINT] = _new_invlist_C_array(XPosixPrint_invlist);
413 PL_XPosix_ptrs[_CC_PUNCT] = _new_invlist_C_array(XPosixPunct_invlist);
414 PL_XPosix_ptrs[_CC_SPACE] = _new_invlist_C_array(XPerlSpace_invlist);
415 PL_XPosix_ptrs[_CC_UPPER] = _new_invlist_C_array(XPosixUpper_invlist);
416 PL_XPosix_ptrs[_CC_VERTSPACE] = _new_invlist_C_array(VertSpace_invlist);
417 PL_XPosix_ptrs[_CC_WORDCHAR] = _new_invlist_C_array(XPosixWord_invlist);
418 PL_XPosix_ptrs[_CC_XDIGIT] = _new_invlist_C_array(XPosixXDigit_invlist);
419 PL_GCB_invlist = _new_invlist_C_array(_Perl_GCB_invlist);
420 PL_SB_invlist = _new_invlist_C_array(_Perl_SB_invlist);
421 PL_WB_invlist = _new_invlist_C_array(_Perl_WB_invlist);
422 PL_LB_invlist = _new_invlist_C_array(_Perl_LB_invlist);
423 #ifdef USE_THREAD_SAFE_LOCALE
424 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
431 =for apidoc nothreadhook
433 Stub that provides thread hook for perl_destruct when there are
440 Perl_nothreadhook(pTHX)
446 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
448 Perl_dump_sv_child(pTHX_ SV *sv)
451 const int sock = PL_dumper_fd;
452 const int debug_fd = PerlIO_fileno(Perl_debug_log);
453 union control_un control;
456 struct cmsghdr *cmptr;
458 unsigned char buffer[256];
460 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
462 if(sock == -1 || debug_fd == -1)
465 PerlIO_flush(Perl_debug_log);
467 /* All these shenanigans are to pass a file descriptor over to our child for
468 it to dump out to. We can't let it hold open the file descriptor when it
469 forks, as the file descriptor it will dump to can turn out to be one end
470 of pipe that some other process will wait on for EOF. (So as it would
471 be open, the wait would be forever.) */
473 msg.msg_control = control.control;
474 msg.msg_controllen = sizeof(control.control);
475 /* We're a connected socket so we don't need a destination */
481 cmptr = CMSG_FIRSTHDR(&msg);
482 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
483 cmptr->cmsg_level = SOL_SOCKET;
484 cmptr->cmsg_type = SCM_RIGHTS;
485 *((int *)CMSG_DATA(cmptr)) = 1;
487 vec[0].iov_base = (void*)&sv;
488 vec[0].iov_len = sizeof(sv);
489 got = sendmsg(sock, &msg, 0);
492 perror("Debug leaking scalars parent sendmsg failed");
495 if(got < sizeof(sv)) {
496 perror("Debug leaking scalars parent short sendmsg");
500 /* Return protocol is
502 unsigned char: length of location string (0 for empty)
503 unsigned char*: string (not terminated)
505 vec[0].iov_base = (void*)&returned_errno;
506 vec[0].iov_len = sizeof(returned_errno);
507 vec[1].iov_base = buffer;
510 got = readv(sock, vec, 2);
513 perror("Debug leaking scalars parent read failed");
514 PerlIO_flush(PerlIO_stderr());
517 if(got < sizeof(returned_errno) + 1) {
518 perror("Debug leaking scalars parent short read");
519 PerlIO_flush(PerlIO_stderr());
524 got = read(sock, buffer + 1, *buffer);
526 perror("Debug leaking scalars parent read 2 failed");
527 PerlIO_flush(PerlIO_stderr());
532 perror("Debug leaking scalars parent short read 2");
533 PerlIO_flush(PerlIO_stderr());
538 if (returned_errno || *buffer) {
539 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
540 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
541 returned_errno, Strerror(returned_errno));
547 =for apidoc perl_destruct
549 Shuts down a Perl interpreter. See L<perlembed>.
558 VOL signed char destruct_level; /* see possible values in intrpvar.h */
560 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
565 PERL_ARGS_ASSERT_PERL_DESTRUCT;
567 PERL_UNUSED_ARG(my_perl);
570 assert(PL_scopestack_ix == 1);
572 /* wait for all pseudo-forked children to finish */
573 PERL_WAIT_FOR_CHILDREN;
575 destruct_level = PL_perl_destruct_level;
576 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
578 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
581 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
585 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
591 if (destruct_level < i) destruct_level = i;
593 #ifdef PERL_TRACK_MEMPOOL
594 /* RT #114496, for perl_free */
595 PL_perl_destruct_level = i;
601 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
607 if (PL_endav && !PL_minus_c) {
608 PERL_SET_PHASE(PERL_PHASE_END);
609 call_list(PL_scopestack_ix, PL_endav);
615 assert(PL_scopestack_ix == 0);
617 /* Need to flush since END blocks can produce output */
618 /* flush stdout separately, since we can identify it */
621 PerlIO *stdo = PerlIO_stdout();
622 if (*stdo && PerlIO_flush(stdo)) {
623 PerlIO_restore_errno(stdo);
625 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s",
634 #ifdef PERL_TRACE_OPS
635 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
637 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
640 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
644 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
645 for (i = 0; i <= OP_max; ++i) {
646 if (PL_op_exec_cnt[i])
647 PerlIO_printf(Perl_debug_log, " %s: %"UVuf"\n", PL_op_name[i], PL_op_exec_cnt[i]);
649 /* Utility slot for easily doing little tracing experiments in the runloop: */
650 if (PL_op_exec_cnt[OP_max+1] != 0)
651 PerlIO_printf(Perl_debug_log, " SPECIAL: %"UVuf"\n", PL_op_exec_cnt[OP_max+1]);
652 PerlIO_printf(Perl_debug_log, "\n");
657 if (PL_threadhook(aTHX)) {
658 /* Threads hook has vetoed further cleanup */
659 PL_veto_cleanup = TRUE;
663 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
664 if (destruct_level != 0) {
665 /* Fork here to create a child. Our child's job is to preserve the
666 state of scalars prior to destruction, so that we can instruct it
667 to dump any scalars that we later find have leaked.
668 There's no subtlety in this code - it assumes POSIX, and it doesn't
672 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
673 perror("Debug leaking scalars socketpair failed");
679 perror("Debug leaking scalars fork failed");
683 /* We are the child */
684 const int sock = fd[1];
685 const int debug_fd = PerlIO_fileno(Perl_debug_log);
688 /* Our success message is an integer 0, and a char 0 */
689 static const char success[sizeof(int) + 1] = {0};
693 /* We need to close all other file descriptors otherwise we end up
694 with interesting hangs, where the parent closes its end of a
695 pipe, and sits waiting for (another) child to terminate. Only
696 that child never terminates, because it never gets EOF, because
697 we also have the far end of the pipe open. We even need to
698 close the debugging fd, because sometimes it happens to be one
699 end of a pipe, and a process is waiting on the other end for
700 EOF. Normally it would be closed at some point earlier in
701 destruction, but if we happen to cause the pipe to remain open,
702 EOF never occurs, and we get an infinite hang. Hence all the
703 games to pass in a file descriptor if it's actually needed. */
705 f = sysconf(_SC_OPEN_MAX);
707 where = "sysconf failed";
718 union control_un control;
721 struct cmsghdr *cmptr;
725 msg.msg_control = control.control;
726 msg.msg_controllen = sizeof(control.control);
727 /* We're a connected socket so we don't need a source */
731 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
733 vec[0].iov_base = (void*)⌖
734 vec[0].iov_len = sizeof(target);
736 got = recvmsg(sock, &msg, 0);
741 where = "recv failed";
744 if(got < sizeof(target)) {
745 where = "short recv";
749 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
753 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
754 where = "wrong cmsg_len";
757 if(cmptr->cmsg_level != SOL_SOCKET) {
758 where = "wrong cmsg_level";
761 if(cmptr->cmsg_type != SCM_RIGHTS) {
762 where = "wrong cmsg_type";
766 got_fd = *(int*)CMSG_DATA(cmptr);
767 /* For our last little bit of trickery, put the file descriptor
768 back into Perl_debug_log, as if we never actually closed it
770 if(got_fd != debug_fd) {
771 if (dup2(got_fd, debug_fd) == -1) {
778 PerlIO_flush(Perl_debug_log);
780 got = write(sock, &success, sizeof(success));
783 where = "write failed";
786 if(got < sizeof(success)) {
787 where = "short write";
794 int send_errno = errno;
795 unsigned char length = (unsigned char) strlen(where);
796 struct iovec failure[3] = {
797 {(void*)&send_errno, sizeof(send_errno)},
799 {(void*)where, length}
801 int got = writev(sock, failure, 3);
802 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
803 in the parent if we try to read from the socketpair after the
804 child has exited, even if there was data to read.
805 So sleep a bit to give the parent a fighting chance of
808 _exit((got == -1) ? errno : 0);
812 PL_dumper_fd = fd[0];
817 /* We must account for everything. */
819 /* Destroy the main CV and syntax tree */
820 /* Set PL_curcop now, because destroying ops can cause new SVs
821 to be generated in Perl_pad_swipe, and when running with
822 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
823 op from which the filename structure member is copied. */
824 PL_curcop = &PL_compiling;
826 /* ensure comppad/curpad to refer to main's pad */
827 if (CvPADLIST(PL_main_cv)) {
828 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
829 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
831 op_free(PL_main_root);
834 PL_main_start = NULL;
835 /* note that PL_main_cv isn't usually actually freed at this point,
836 * due to the CvOUTSIDE refs from subs compiled within it. It will
837 * get freed once all the subs are freed in sv_clean_all(), for
838 * destruct_level > 0 */
839 SvREFCNT_dec(PL_main_cv);
841 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
843 /* Tell PerlIO we are about to tear things apart in case
844 we have layers which are using resources that should
848 PerlIO_destruct(aTHX);
851 * Try to destruct global references. We do this first so that the
852 * destructors and destructees still exist. Some sv's might remain.
853 * Non-referenced objects are on their own.
857 /* unhook hooks which will soon be, or use, destroyed data */
858 SvREFCNT_dec(PL_warnhook);
860 SvREFCNT_dec(PL_diehook);
863 /* call exit list functions */
864 while (PL_exitlistlen-- > 0)
865 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
867 Safefree(PL_exitlist);
872 SvREFCNT_dec(PL_registered_mros);
874 /* jettison our possibly duplicated environment */
875 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
876 * so we certainly shouldn't free it here
879 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
880 if (environ != PL_origenviron && !PL_use_safe_putenv
882 /* only main thread can free environ[0] contents */
883 && PL_curinterp == aTHX
889 for (i = 0; environ[i]; i++)
890 safesysfree(environ[i]);
892 /* Must use safesysfree() when working with environ. */
893 safesysfree(environ);
895 environ = PL_origenviron;
898 #endif /* !PERL_MICRO */
900 if (destruct_level == 0) {
902 DEBUG_P(debprofdump());
904 #if defined(PERLIO_LAYERS)
905 /* No more IO - including error messages ! */
906 PerlIO_cleanup(aTHX);
909 CopFILE_free(&PL_compiling);
911 /* The exit() function will do everything that needs doing. */
915 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
918 /* the syntax tree is shared between clones
919 * so op_free(PL_main_root) only ReREFCNT_dec's
920 * REGEXPs in the parent interpreter
921 * we need to manually ReREFCNT_dec for the clones
924 I32 i = AvFILLp(PL_regex_padav);
925 SV **ary = AvARRAY(PL_regex_padav);
928 SvREFCNT_dec(ary[i]);
929 ary[i] = &PL_sv_undef;
935 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
936 PL_stashcache = NULL;
938 /* loosen bonds of global variables */
940 /* XXX can PL_parser still be non-null here? */
941 if(PL_parser && PL_parser->rsfp) {
942 (void)PerlIO_close(PL_parser->rsfp);
943 PL_parser->rsfp = NULL;
947 Safefree(PL_splitstr);
957 PL_doswitches = FALSE;
958 PL_dowarn = G_WARN_OFF;
959 #ifdef PERL_SAWAMPERSAND
960 PL_sawampersand = 0; /* must save all match strings */
964 Safefree(PL_inplace);
966 SvREFCNT_dec(PL_patchlevel);
969 SvREFCNT_dec(PL_e_script);
975 /* magical thingies */
977 SvREFCNT_dec(PL_ofsgv); /* *, */
980 SvREFCNT_dec(PL_ors_sv); /* $\ */
983 SvREFCNT_dec(PL_rs); /* $/ */
986 Safefree(PL_osname); /* $^O */
989 SvREFCNT_dec(PL_statname);
993 /* defgv, aka *_ should be taken care of elsewhere */
996 Safefree(PL_efloatbuf);
1000 /* startup and shutdown function lists */
1001 SvREFCNT_dec(PL_beginav);
1002 SvREFCNT_dec(PL_beginav_save);
1003 SvREFCNT_dec(PL_endav);
1004 SvREFCNT_dec(PL_checkav);
1005 SvREFCNT_dec(PL_checkav_save);
1006 SvREFCNT_dec(PL_unitcheckav);
1007 SvREFCNT_dec(PL_unitcheckav_save);
1008 SvREFCNT_dec(PL_initav);
1010 PL_beginav_save = NULL;
1013 PL_checkav_save = NULL;
1014 PL_unitcheckav = NULL;
1015 PL_unitcheckav_save = NULL;
1018 /* shortcuts just get cleared */
1021 PL_argvoutgv = NULL;
1024 PL_last_in_gv = NULL;
1035 SvREFCNT_dec(PL_envgv);
1036 SvREFCNT_dec(PL_incgv);
1037 SvREFCNT_dec(PL_argvgv);
1038 SvREFCNT_dec(PL_replgv);
1039 SvREFCNT_dec(PL_DBgv);
1040 SvREFCNT_dec(PL_DBline);
1041 SvREFCNT_dec(PL_DBsub);
1050 SvREFCNT_dec(PL_argvout_stack);
1051 PL_argvout_stack = NULL;
1053 SvREFCNT_dec(PL_modglobal);
1054 PL_modglobal = NULL;
1055 SvREFCNT_dec(PL_preambleav);
1056 PL_preambleav = NULL;
1057 SvREFCNT_dec(PL_subname);
1059 #ifdef PERL_USES_PL_PIDSTATUS
1060 SvREFCNT_dec(PL_pidstatus);
1061 PL_pidstatus = NULL;
1063 SvREFCNT_dec(PL_toptarget);
1064 PL_toptarget = NULL;
1065 SvREFCNT_dec(PL_bodytarget);
1066 PL_bodytarget = NULL;
1067 PL_formtarget = NULL;
1069 /* free locale stuff */
1070 #ifdef USE_LOCALE_COLLATE
1071 Safefree(PL_collation_name);
1072 PL_collation_name = NULL;
1075 #ifdef USE_LOCALE_NUMERIC
1076 Safefree(PL_numeric_name);
1077 PL_numeric_name = NULL;
1078 SvREFCNT_dec(PL_numeric_radix_sv);
1079 PL_numeric_radix_sv = NULL;
1082 /* clear character classes */
1083 for (i = 0; i < POSIX_SWASH_COUNT; i++) {
1084 SvREFCNT_dec(PL_utf8_swash_ptrs[i]);
1085 PL_utf8_swash_ptrs[i] = NULL;
1087 SvREFCNT_dec(PL_utf8_mark);
1088 SvREFCNT_dec(PL_utf8_toupper);
1089 SvREFCNT_dec(PL_utf8_totitle);
1090 SvREFCNT_dec(PL_utf8_tolower);
1091 SvREFCNT_dec(PL_utf8_tofold);
1092 SvREFCNT_dec(PL_utf8_idstart);
1093 SvREFCNT_dec(PL_utf8_idcont);
1094 SvREFCNT_dec(PL_utf8_foldable);
1095 SvREFCNT_dec(PL_utf8_foldclosures);
1096 SvREFCNT_dec(PL_AboveLatin1);
1097 SvREFCNT_dec(PL_InBitmap);
1098 SvREFCNT_dec(PL_UpperLatin1);
1099 SvREFCNT_dec(PL_Latin1);
1100 SvREFCNT_dec(PL_NonL1NonFinalFold);
1101 SvREFCNT_dec(PL_HasMultiCharFold);
1102 #ifdef USE_LOCALE_CTYPE
1103 SvREFCNT_dec(PL_warn_locale);
1105 PL_utf8_mark = NULL;
1106 PL_utf8_toupper = NULL;
1107 PL_utf8_totitle = NULL;
1108 PL_utf8_tolower = NULL;
1109 PL_utf8_tofold = NULL;
1110 PL_utf8_idstart = NULL;
1111 PL_utf8_idcont = NULL;
1112 PL_utf8_foldclosures = NULL;
1113 PL_AboveLatin1 = NULL;
1115 PL_HasMultiCharFold = NULL;
1116 #ifdef USE_LOCALE_CTYPE
1117 PL_warn_locale = NULL;
1120 PL_NonL1NonFinalFold = NULL;
1121 PL_UpperLatin1 = NULL;
1122 for (i = 0; i < POSIX_CC_COUNT; i++) {
1123 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1124 PL_XPosix_ptrs[i] = NULL;
1126 PL_GCB_invlist = NULL;
1127 PL_LB_invlist = NULL;
1128 PL_SB_invlist = NULL;
1129 PL_WB_invlist = NULL;
1131 if (!specialWARN(PL_compiling.cop_warnings))
1132 PerlMemShared_free(PL_compiling.cop_warnings);
1133 PL_compiling.cop_warnings = NULL;
1134 cophh_free(CopHINTHASH_get(&PL_compiling));
1135 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1136 CopFILE_free(&PL_compiling);
1138 /* Prepare to destruct main symbol table. */
1141 /* break ref loop *:: <=> %:: */
1142 (void)hv_delete(hv, "main::", 6, G_DISCARD);
1145 SvREFCNT_dec(PL_curstname);
1146 PL_curstname = NULL;
1148 /* clear queued errors */
1149 SvREFCNT_dec(PL_errors);
1152 SvREFCNT_dec(PL_isarev);
1155 if (destruct_level >= 2) {
1156 if (PL_scopestack_ix != 0)
1157 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1158 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1159 (long)PL_scopestack_ix);
1160 if (PL_savestack_ix != 0)
1161 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1162 "Unbalanced saves: %ld more saves than restores\n",
1163 (long)PL_savestack_ix);
1164 if (PL_tmps_floor != -1)
1165 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1166 (long)PL_tmps_floor + 1);
1167 if (cxstack_ix != -1)
1168 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1169 (long)cxstack_ix + 1);
1173 SvREFCNT_dec(PL_regex_padav);
1174 PL_regex_padav = NULL;
1175 PL_regex_pad = NULL;
1178 #ifdef PERL_IMPLICIT_CONTEXT
1179 /* the entries in this list are allocated via SV PVX's, so get freed
1180 * in sv_clean_all */
1181 Safefree(PL_my_cxt_list);
1184 /* Now absolutely destruct everything, somehow or other, loops or no. */
1186 /* the 2 is for PL_fdpid and PL_strtab */
1187 while (sv_clean_all() > 2)
1191 Safefree(PL_stashpad); /* must come after sv_clean_all */
1194 AvREAL_off(PL_fdpid); /* no surviving entries */
1195 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1198 #ifdef HAVE_INTERP_INTERN
1202 /* constant strings */
1203 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1204 SvREFCNT_dec(PL_sv_consts[i]);
1205 PL_sv_consts[i] = NULL;
1208 /* Destruct the global string table. */
1210 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1211 * so that sv_free() won't fail on them.
1212 * Now that the global string table is using a single hunk of memory
1213 * for both HE and HEK, we either need to explicitly unshare it the
1214 * correct way, or actually free things here.
1217 const I32 max = HvMAX(PL_strtab);
1218 HE * const * const array = HvARRAY(PL_strtab);
1219 HE *hent = array[0];
1222 if (hent && ckWARN_d(WARN_INTERNAL)) {
1223 HE * const next = HeNEXT(hent);
1224 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1225 "Unbalanced string table refcount: (%ld) for \"%s\"",
1226 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1233 hent = array[riter];
1238 HvARRAY(PL_strtab) = 0;
1239 HvTOTALKEYS(PL_strtab) = 0;
1241 SvREFCNT_dec(PL_strtab);
1244 /* free the pointer tables used for cloning */
1245 ptr_table_free(PL_ptr_table);
1246 PL_ptr_table = (PTR_TBL_t*)NULL;
1249 /* free special SVs */
1251 SvREFCNT(&PL_sv_yes) = 0;
1252 sv_clear(&PL_sv_yes);
1253 SvANY(&PL_sv_yes) = NULL;
1254 SvFLAGS(&PL_sv_yes) = 0;
1256 SvREFCNT(&PL_sv_no) = 0;
1257 sv_clear(&PL_sv_no);
1258 SvANY(&PL_sv_no) = NULL;
1259 SvFLAGS(&PL_sv_no) = 0;
1263 for (i=0; i<=2; i++) {
1264 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1265 sv_clear(PERL_DEBUG_PAD(i));
1266 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1267 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1271 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1272 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1274 #ifdef DEBUG_LEAKING_SCALARS
1275 if (PL_sv_count != 0) {
1280 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1281 svend = &sva[SvREFCNT(sva)];
1282 for (sv = sva + 1; sv < svend; ++sv) {
1283 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1284 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1286 " refcnt=%"UVuf pTHX__FORMAT "\n"
1287 "\tallocated at %s:%d %s %s (parent 0x%"UVxf");"
1289 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1291 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1293 sv->sv_debug_inpad ? "for" : "by",
1294 sv->sv_debug_optype ?
1295 PL_op_name[sv->sv_debug_optype]: "(none)",
1296 PTR2UV(sv->sv_debug_parent),
1299 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1300 Perl_dump_sv_child(aTHX_ sv);
1306 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1310 /* Wait for up to 4 seconds for child to terminate.
1311 This seems to be the least effort way of timing out on reaping
1313 struct timeval waitfor = {4, 0};
1314 int sock = PL_dumper_fd;
1318 FD_SET(sock, &rset);
1319 select(sock + 1, &rset, NULL, NULL, &waitfor);
1320 waitpid(child, &status, WNOHANG);
1325 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1331 #if defined(PERLIO_LAYERS)
1332 /* No more IO - including error messages ! */
1333 PerlIO_cleanup(aTHX);
1336 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1337 as currently layers use it rather than NULL as a marker
1338 for no arg - and will try and SvREFCNT_dec it.
1340 SvREFCNT(&PL_sv_undef) = 0;
1341 SvREADONLY_off(&PL_sv_undef);
1343 Safefree(PL_origfilename);
1344 PL_origfilename = NULL;
1345 Safefree(PL_reg_curpm);
1346 free_tied_hv_pool();
1347 Safefree(PL_op_mask);
1348 Safefree(PL_psig_name);
1349 PL_psig_name = (SV**)NULL;
1350 PL_psig_ptr = (SV**)NULL;
1352 /* We need to NULL PL_psig_pend first, so that
1353 signal handlers know not to use it */
1354 int *psig_save = PL_psig_pend;
1355 PL_psig_pend = (int*)NULL;
1356 Safefree(psig_save);
1359 TAINTING_set(FALSE);
1360 TAINT_WARN_set(FALSE);
1361 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1363 DEBUG_P(debprofdump());
1367 #ifdef USE_REENTRANT_API
1368 Perl_reentrant_free(aTHX);
1371 /* These all point to HVs that are about to be blown away.
1372 Code in core and on CPAN assumes that if the interpreter is re-started
1373 that they will be cleanly NULL or pointing to a valid HV. */
1374 PL_custom_op_names = NULL;
1375 PL_custom_op_descs = NULL;
1376 PL_custom_ops = NULL;
1380 while (PL_regmatch_slab) {
1381 regmatch_slab *s = PL_regmatch_slab;
1382 PL_regmatch_slab = PL_regmatch_slab->next;
1386 /* As the absolutely last thing, free the non-arena SV for mess() */
1389 /* we know that type == SVt_PVMG */
1391 /* it could have accumulated taint magic */
1394 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1395 moremagic = mg->mg_moremagic;
1396 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1398 Safefree(mg->mg_ptr);
1402 /* we know that type >= SVt_PV */
1403 SvPV_free(PL_mess_sv);
1404 Safefree(SvANY(PL_mess_sv));
1405 Safefree(PL_mess_sv);
1412 =for apidoc perl_free
1414 Releases a Perl interpreter. See L<perlembed>.
1424 PERL_ARGS_ASSERT_PERL_FREE;
1426 if (PL_veto_cleanup)
1429 #ifdef PERL_TRACK_MEMPOOL
1432 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1433 * value as we're probably hunting memory leaks then
1435 if (PL_perl_destruct_level == 0) {
1436 const U32 old_debug = PL_debug;
1437 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1438 thread at thread exit. */
1440 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1441 "free this thread's memory\n");
1442 PL_debug &= ~ DEBUG_m_FLAG;
1444 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1445 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1446 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1449 PL_debug = old_debug;
1454 #if defined(WIN32) || defined(NETWARE)
1455 # if defined(PERL_IMPLICIT_SYS)
1458 void *host = nw_internal_host;
1459 PerlMem_free(aTHXx);
1460 nw_delete_internal_host(host);
1462 void *host = w32_internal_host;
1463 PerlMem_free(aTHXx);
1464 win32_delete_internal_host(host);
1468 PerlMem_free(aTHXx);
1471 PerlMem_free(aTHXx);
1475 #if defined(USE_ITHREADS)
1476 /* provide destructors to clean up the thread key when libperl is unloaded */
1477 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1479 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1480 #pragma fini "perl_fini"
1481 #elif defined(__sun) && !defined(__GNUC__)
1482 #pragma fini (perl_fini)
1486 #if defined(__GNUC__)
1487 __attribute__((destructor))
1493 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1496 PL_curinterp && !PL_veto_cleanup)
1501 #endif /* THREADS */
1504 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1506 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1507 PL_exitlist[PL_exitlistlen].fn = fn;
1508 PL_exitlist[PL_exitlistlen].ptr = ptr;
1513 =for apidoc perl_parse
1515 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1520 #define SET_CURSTASH(newstash) \
1521 if (PL_curstash != newstash) { \
1522 SvREFCNT_dec(PL_curstash); \
1523 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1527 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1534 PERL_ARGS_ASSERT_PERL_PARSE;
1535 #ifndef MULTIPLICITY
1536 PERL_UNUSED_ARG(my_perl);
1538 #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) || defined(USE_HASH_SEED_DEBUG)
1540 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1542 if (s && strEQ(s, "1")) {
1543 const unsigned char *seed= PERL_HASH_SEED;
1544 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1545 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1546 while (seed < seed_end) {
1547 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1549 #ifdef PERL_HASH_RANDOMIZE_KEYS
1550 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1551 PL_HASH_RAND_BITS_ENABLED,
1552 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1554 PerlIO_printf(Perl_debug_log, "\n");
1557 #endif /* #if defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) */
1561 struct NameTranslationInfo nti;
1562 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1569 if (PL_origalen != 0) {
1570 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1573 /* Set PL_origalen be the sum of the contiguous argv[]
1574 * elements plus the size of the env in case that it is
1575 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1576 * as the maximum modifiable length of $0. In the worst case
1577 * the area we are able to modify is limited to the size of
1578 * the original argv[0]. (See below for 'contiguous', though.)
1580 const char *s = NULL;
1582 const UV mask = ~(UV)(PTRSIZE-1);
1583 /* Do the mask check only if the args seem like aligned. */
1585 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1587 /* See if all the arguments are contiguous in memory. Note
1588 * that 'contiguous' is a loose term because some platforms
1589 * align the argv[] and the envp[]. If the arguments look
1590 * like non-aligned, assume that they are 'strictly' or
1591 * 'traditionally' contiguous. If the arguments look like
1592 * aligned, we just check that they are within aligned
1593 * PTRSIZE bytes. As long as no system has something bizarre
1594 * like the argv[] interleaved with some other data, we are
1595 * fine. (Did I just evoke Murphy's Law?) --jhi */
1596 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1598 for (i = 1; i < PL_origargc; i++) {
1599 if ((PL_origargv[i] == s + 1
1601 || PL_origargv[i] == s + 2
1606 (PL_origargv[i] > s &&
1608 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1619 #ifndef PERL_USE_SAFE_PUTENV
1620 /* Can we grab env area too to be used as the area for $0? */
1621 if (s && PL_origenviron && !PL_use_safe_putenv) {
1622 if ((PL_origenviron[0] == s + 1)
1625 (PL_origenviron[0] > s &&
1626 PL_origenviron[0] <=
1627 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1630 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1631 s = PL_origenviron[0];
1634 my_setenv("NoNe SuCh", NULL);
1635 /* Force copy of environment. */
1636 for (i = 1; PL_origenviron[i]; i++) {
1637 if (PL_origenviron[i] == s + 1
1640 (PL_origenviron[i] > s &&
1641 PL_origenviron[i] <=
1642 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1645 s = PL_origenviron[i];
1653 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1655 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1660 /* Come here if running an undumped a.out. */
1662 PL_origfilename = savepv(argv[0]);
1663 PL_do_undump = FALSE;
1664 cxstack_ix = -1; /* start label stack again */
1666 assert (!TAINT_get);
1670 init_postdump_symbols(argc,argv,env);
1675 op_free(PL_main_root);
1676 PL_main_root = NULL;
1678 PL_main_start = NULL;
1679 SvREFCNT_dec(PL_main_cv);
1683 oldscope = PL_scopestack_ix;
1684 PL_dowarn = G_WARN_OFF;
1689 parse_body(env,xsinit);
1690 if (PL_unitcheckav) {
1691 call_list(oldscope, PL_unitcheckav);
1694 PERL_SET_PHASE(PERL_PHASE_CHECK);
1695 call_list(oldscope, PL_checkav);
1703 /* my_exit() was called */
1704 while (PL_scopestack_ix > oldscope)
1707 SET_CURSTASH(PL_defstash);
1708 if (PL_unitcheckav) {
1709 call_list(oldscope, PL_unitcheckav);
1712 PERL_SET_PHASE(PERL_PHASE_CHECK);
1713 call_list(oldscope, PL_checkav);
1718 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1726 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1727 miniperl, and we need to see those flags reflected in the values here. */
1729 /* What this returns is subject to change. Use the public interface in Config.
1732 S_Internals_V(pTHX_ CV *cv)
1735 #ifdef LOCAL_PATCH_COUNT
1736 const int local_patch_count = LOCAL_PATCH_COUNT;
1738 const int local_patch_count = 0;
1740 const int entries = 3 + local_patch_count;
1742 static const char non_bincompat_options[] =
1749 # ifdef NO_HASH_SEED
1752 # ifdef NO_TAINT_SUPPORT
1755 # ifdef PERL_BOOL_AS_CHAR
1756 " PERL_BOOL_AS_CHAR"
1758 # ifdef PERL_COPY_ON_WRITE
1759 " PERL_COPY_ON_WRITE"
1761 # ifdef PERL_DISABLE_PMC
1764 # ifdef PERL_DONT_CREATE_GVSV
1765 " PERL_DONT_CREATE_GVSV"
1767 # ifdef PERL_EXTERNAL_GLOB
1768 " PERL_EXTERNAL_GLOB"
1770 # ifdef PERL_HASH_FUNC_SIPHASH
1771 " PERL_HASH_FUNC_SIPHASH"
1773 # ifdef PERL_HASH_FUNC_SDBM
1774 " PERL_HASH_FUNC_SDBM"
1776 # ifdef PERL_HASH_FUNC_DJB2
1777 " PERL_HASH_FUNC_DJB2"
1779 # ifdef PERL_HASH_FUNC_SUPERFAST
1780 " PERL_HASH_FUNC_SUPERFAST"
1782 # ifdef PERL_HASH_FUNC_MURMUR3
1783 " PERL_HASH_FUNC_MURMUR3"
1785 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1786 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1788 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1789 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1791 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1792 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1794 # ifdef PERL_IS_MINIPERL
1797 # ifdef PERL_MALLOC_WRAP
1800 # ifdef PERL_MEM_LOG
1803 # ifdef PERL_MEM_LOG_NOIMPL
1804 " PERL_MEM_LOG_NOIMPL"
1806 # ifdef PERL_OP_PARENT
1809 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1810 " PERL_PERTURB_KEYS_DETERMINISTIC"
1812 # ifdef PERL_PERTURB_KEYS_DISABLED
1813 " PERL_PERTURB_KEYS_DISABLED"
1815 # ifdef PERL_PERTURB_KEYS_RANDOM
1816 " PERL_PERTURB_KEYS_RANDOM"
1818 # ifdef PERL_PRESERVE_IVUV
1819 " PERL_PRESERVE_IVUV"
1821 # ifdef PERL_RELOCATABLE_INCPUSH
1822 " PERL_RELOCATABLE_INCPUSH"
1824 # ifdef PERL_USE_DEVEL
1827 # ifdef PERL_USE_SAFE_PUTENV
1828 " PERL_USE_SAFE_PUTENV"
1830 # ifdef SILENT_NO_TAINT_SUPPORT
1831 " SILENT_NO_TAINT_SUPPORT"
1833 # ifdef UNLINK_ALL_VERSIONS
1834 " UNLINK_ALL_VERSIONS"
1836 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1837 " USE_ATTRIBUTES_FOR_PERLIO"
1839 # ifdef USE_FAST_STDIO
1842 # ifdef USE_HASH_SEED_EXPLICIT
1843 " USE_HASH_SEED_EXPLICIT"
1848 # ifdef USE_LOCALE_CTYPE
1851 # ifdef WIN32_NO_REGISTRY
1854 # ifdef USE_PERL_ATOF
1857 # ifdef USE_SITECUSTOMIZE
1858 " USE_SITECUSTOMIZE"
1861 PERL_UNUSED_ARG(cv);
1862 PERL_UNUSED_VAR(items);
1864 EXTEND(SP, entries);
1866 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1867 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1868 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1870 #ifndef PERL_BUILD_DATE
1873 # define PERL_BUILD_DATE __DATE__ " " __TIME__
1875 # define PERL_BUILD_DATE __DATE__
1880 #ifdef PERL_BUILD_DATE
1881 PUSHs(Perl_newSVpvn_flags(aTHX_
1882 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
1885 PUSHs(&PL_sv_undef);
1888 for (i = 1; i <= local_patch_count; i++) {
1889 /* This will be an undef, if PL_localpatches[i] is NULL. */
1890 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1896 #define INCPUSH_UNSHIFT 0x01
1897 #define INCPUSH_ADD_OLD_VERS 0x02
1898 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1899 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1900 #define INCPUSH_NOT_BASEDIR 0x10
1901 #define INCPUSH_CAN_RELOCATE 0x20
1902 #define INCPUSH_ADD_SUB_DIRS \
1903 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1906 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1910 int argc = PL_origargc;
1911 char **argv = PL_origargv;
1912 const char *scriptname = NULL;
1913 bool dosearch = FALSE;
1915 bool doextract = FALSE;
1916 const char *cddir = NULL;
1917 #ifdef USE_SITECUSTOMIZE
1918 bool minus_f = FALSE;
1920 SV *linestr_sv = NULL;
1921 bool add_read_e_script = FALSE;
1922 U32 lex_start_flags = 0;
1924 PERL_SET_PHASE(PERL_PHASE_START);
1930 for (argc--,argv++; argc > 0; argc--,argv++) {
1931 if (argv[0][0] != '-' || !argv[0][1])
1937 #ifndef PERL_STRICT_CR
1961 if ((s = moreswitches(s)))
1966 #if defined(SILENT_NO_TAINT_SUPPORT)
1967 /* silently ignore */
1968 #elif defined(NO_TAINT_SUPPORT)
1969 Perl_croak_nocontext("This perl was compiled without taint support. "
1970 "Cowardly refusing to run with -t or -T flags");
1972 CHECK_MALLOC_TOO_LATE_FOR('t');
1973 if( !TAINTING_get ) {
1974 TAINT_WARN_set(TRUE);
1981 #if defined(SILENT_NO_TAINT_SUPPORT)
1982 /* silently ignore */
1983 #elif defined(NO_TAINT_SUPPORT)
1984 Perl_croak_nocontext("This perl was compiled without taint support. "
1985 "Cowardly refusing to run with -t or -T flags");
1987 CHECK_MALLOC_TOO_LATE_FOR('T');
1989 TAINT_WARN_set(FALSE);
1998 forbid_setid('e', FALSE);
2000 PL_e_script = newSVpvs("");
2001 add_read_e_script = TRUE;
2004 sv_catpv(PL_e_script, s);
2006 sv_catpv(PL_e_script, argv[1]);
2010 Perl_croak(aTHX_ "No code specified for -%c", c);
2011 sv_catpvs(PL_e_script, "\n");
2015 #ifdef USE_SITECUSTOMIZE
2021 case 'I': /* -I handled both here and in moreswitches() */
2022 forbid_setid('I', FALSE);
2023 if (!*++s && (s=argv[1]) != NULL) {
2027 STRLEN len = strlen(s);
2028 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2031 Perl_croak(aTHX_ "No directory specified for -I");
2034 forbid_setid('S', FALSE);
2043 opts_prog = newSVpvs("use Config; Config::_V()");
2047 opts_prog = Perl_newSVpvf(aTHX_
2048 "use Config; Config::config_vars(qw%c%s%c)",
2052 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2053 /* don't look for script or read stdin */
2054 scriptname = BIT_BUCKET;
2066 if (!*++s || isSPACE(*s)) {
2070 /* catch use of gnu style long options.
2071 Both of these exit immediately. */
2072 if (strEQ(s, "version"))
2074 if (strEQ(s, "help"))
2079 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2090 #ifndef SECURE_INTERNAL_GETENV
2093 (s = PerlEnv_getenv("PERL5OPT")))
2095 /* s points to static memory in getenv(), which may be overwritten at
2096 * any time; use a mortal copy instead */
2097 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2101 if (*s == '-' && *(s+1) == 'T') {
2102 #if defined(SILENT_NO_TAINT_SUPPORT)
2103 /* silently ignore */
2104 #elif defined(NO_TAINT_SUPPORT)
2105 Perl_croak_nocontext("This perl was compiled without taint support. "
2106 "Cowardly refusing to run with -t or -T flags");
2108 CHECK_MALLOC_TOO_LATE_FOR('T');
2110 TAINT_WARN_set(FALSE);
2114 char *popt_copy = NULL;
2127 if (!strchr("CDIMUdmtwW", *s))
2128 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2132 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2133 s = popt_copy + (s - d);
2141 #if defined(SILENT_NO_TAINT_SUPPORT)
2142 /* silently ignore */
2143 #elif defined(NO_TAINT_SUPPORT)
2144 Perl_croak_nocontext("This perl was compiled without taint support. "
2145 "Cowardly refusing to run with -t or -T flags");
2147 if( !TAINTING_get) {
2148 TAINT_WARN_set(TRUE);
2160 /* Set $^X early so that it can be used for relocatable paths in @INC */
2161 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2162 assert (!TAINT_get);
2167 #if defined(USE_SITECUSTOMIZE)
2169 /* The games with local $! are to avoid setting errno if there is no
2170 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2171 ie a q() operator with a NUL byte as a the delimiter. This avoids
2172 problems with pathnames containing (say) ' */
2173 # ifdef PERL_IS_MINIPERL
2174 AV *const inc = GvAV(PL_incgv);
2175 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2178 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2179 it should be reported immediately as a build failure. */
2180 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2182 "BEGIN { my $f = q%c%s%"SVf"/buildcustomize.pl%c; "
2183 "do {local $!; -f $f }"
2184 " and do $f || die $@ || qq '$f: $!' }",
2185 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2188 /* SITELIB_EXP is a function call on Win32. */
2189 const char *const raw_sitelib = SITELIB_EXP;
2191 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2192 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2193 INCPUSH_CAN_RELOCATE);
2194 const char *const sitelib = SvPVX(sitelib_sv);
2195 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2197 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2198 0, SVfARG(sitelib), 0,
2199 0, SVfARG(sitelib), 0));
2200 assert (SvREFCNT(sitelib_sv) == 1);
2201 SvREFCNT_dec(sitelib_sv);
2208 scriptname = argv[0];
2211 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2213 else if (scriptname == NULL) {
2215 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2221 assert (!TAINT_get);
2225 bool suidscript = FALSE;
2227 rsfp = open_script(scriptname, dosearch, &suidscript);
2229 rsfp = PerlIO_stdin();
2230 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2233 validate_suid(rsfp);
2236 # if defined(SIGCHLD) || defined(SIGCLD)
2239 # define SIGCHLD SIGCLD
2241 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2242 if (sigstate == (Sighandler_t) SIG_IGN) {
2243 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2244 "Can't ignore signal CHLD, forcing to default");
2245 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2253 /* This will croak if suidscript is true, as -x cannot be used with
2255 forbid_setid('x', suidscript);
2256 /* Hence you can't get here if suidscript is true */
2258 linestr_sv = newSV_type(SVt_PV);
2259 lex_start_flags |= LEX_START_COPIED;
2260 find_beginning(linestr_sv, rsfp);
2261 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2262 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2266 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2267 CvUNIQUE_on(PL_compcv);
2269 CvPADLIST_set(PL_compcv, pad_new(0));
2271 PL_isarev = newHV();
2274 boot_core_UNIVERSAL();
2276 newXS("Internals::V", S_Internals_V, __FILE__);
2279 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2281 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2287 # ifdef HAS_SOCKS5_INIT
2288 socks5_init(argv[0]);
2294 init_predump_symbols();
2295 /* init_postdump_symbols not currently designed to be called */
2296 /* more than once (ENV isn't cleared first, for example) */
2297 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2299 init_postdump_symbols(argc,argv,env);
2301 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2302 * or explicitly in some platforms.
2303 * locale.c:Perl_init_i18nl10n() if the environment
2304 * look like the user wants to use UTF-8. */
2305 #if defined(__SYMBIAN32__)
2306 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2308 # ifndef PERL_IS_MINIPERL
2310 /* Requires init_predump_symbols(). */
2311 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2316 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2317 * and the default open disciplines. */
2318 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2319 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2321 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2322 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2323 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2325 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2326 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2327 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2329 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2330 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2331 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2333 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2334 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2337 sv_setpvs(sv, ":utf8\0:utf8");
2339 sv_setpvs(sv, ":utf8\0");
2342 sv_setpvs(sv, "\0:utf8");
2351 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2352 if (strEQ(s, "unsafe"))
2353 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2354 else if (strEQ(s, "safe"))
2355 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2357 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2362 lex_start(linestr_sv, rsfp, lex_start_flags);
2363 SvREFCNT_dec(linestr_sv);
2365 PL_subname = newSVpvs("main");
2367 if (add_read_e_script)
2368 filter_add(read_e_script, NULL);
2370 /* now parse the script */
2372 SETERRNO(0,SS_NORMAL);
2373 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2375 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2377 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2381 CopLINE_set(PL_curcop, 0);
2382 SET_CURSTASH(PL_defstash);
2384 SvREFCNT_dec(PL_e_script);
2392 SAVECOPFILE(PL_curcop);
2393 SAVECOPLINE(PL_curcop);
2394 gv_check(PL_defstash);
2404 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2405 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2406 dump_mstats("after compilation:");
2411 PL_restartjmpenv = NULL;
2417 =for apidoc perl_run
2419 Tells a Perl interpreter to run. See L<perlembed>.
2431 PERL_ARGS_ASSERT_PERL_RUN;
2432 #ifndef MULTIPLICITY
2433 PERL_UNUSED_ARG(my_perl);
2436 oldscope = PL_scopestack_ix;
2444 cxstack_ix = -1; /* start context stack again */
2446 case 0: /* normal completion */
2450 case 2: /* my_exit() */
2451 while (PL_scopestack_ix > oldscope)
2454 SET_CURSTASH(PL_defstash);
2455 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2456 PL_endav && !PL_minus_c) {
2457 PERL_SET_PHASE(PERL_PHASE_END);
2458 call_list(oldscope, PL_endav);
2461 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2462 dump_mstats("after execution: ");
2468 POPSTACK_TO(PL_mainstack);
2471 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2482 S_run_body(pTHX_ I32 oldscope)
2484 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2485 PL_sawampersand ? "Enabling" : "Omitting",
2486 (unsigned int)(PL_sawampersand)));
2488 if (!PL_restartop) {
2490 if (DEBUG_x_TEST || DEBUG_B_TEST)
2491 dump_all_perl(!DEBUG_B_TEST);
2493 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2497 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2500 if (PERLDB_SINGLE && PL_DBsingle)
2503 PERL_SET_PHASE(PERL_PHASE_INIT);
2504 call_list(oldscope, PL_initav);
2506 #ifdef PERL_DEBUG_READONLY_OPS
2507 if (PL_main_root && PL_main_root->op_slabbed)
2508 Slab_to_ro(OpSLAB(PL_main_root));
2514 PERL_SET_PHASE(PERL_PHASE_RUN);
2517 PL_restartjmpenv = NULL;
2518 PL_op = PL_restartop;
2522 else if (PL_main_start) {
2523 CvDEPTH(PL_main_cv) = 1;
2524 PL_op = PL_main_start;
2528 NOT_REACHED; /* NOTREACHED */
2532 =head1 SV Manipulation Functions
2534 =for apidoc p||get_sv
2536 Returns the SV of the specified Perl scalar. C<flags> are passed to
2537 C<gv_fetchpv>. If C<GV_ADD> is set and the
2538 Perl variable does not exist then it will be created. If C<flags> is zero
2539 and the variable does not exist then NULL is returned.
2545 Perl_get_sv(pTHX_ const char *name, I32 flags)
2549 PERL_ARGS_ASSERT_GET_SV;
2551 gv = gv_fetchpv(name, flags, SVt_PV);
2558 =head1 Array Manipulation Functions
2560 =for apidoc p||get_av
2562 Returns the AV of the specified Perl global or package array with the given
2563 name (so it won't work on lexical variables). C<flags> are passed
2564 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2565 Perl variable does not exist then it will be created. If C<flags> is zero
2566 and the variable does not exist then NULL is returned.
2568 Perl equivalent: C<@{"$name"}>.
2574 Perl_get_av(pTHX_ const char *name, I32 flags)
2576 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2578 PERL_ARGS_ASSERT_GET_AV;
2588 =head1 Hash Manipulation Functions
2590 =for apidoc p||get_hv
2592 Returns the HV of the specified Perl hash. C<flags> are passed to
2593 C<gv_fetchpv>. If C<GV_ADD> is set and the
2594 Perl variable does not exist then it will be created. If C<flags> is zero
2595 and the variable does not exist then C<NULL> is returned.
2601 Perl_get_hv(pTHX_ const char *name, I32 flags)
2603 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2605 PERL_ARGS_ASSERT_GET_HV;
2615 =head1 CV Manipulation Functions
2617 =for apidoc p||get_cvn_flags
2619 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2620 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2621 exist then it will be declared (which has the same effect as saying
2622 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2623 then NULL is returned.
2625 =for apidoc p||get_cv
2627 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2633 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2635 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2637 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2639 /* XXX this is probably not what they think they're getting.
2640 * It has the same effect as "sub name;", i.e. just a forward
2642 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2643 return newSTUB(gv,0);
2650 /* Nothing in core calls this now, but we can't replace it with a macro and
2651 move it to mathoms.c as a macro would evaluate name twice. */
2653 Perl_get_cv(pTHX_ const char *name, I32 flags)
2655 PERL_ARGS_ASSERT_GET_CV;
2657 return get_cvn_flags(name, strlen(name), flags);
2660 /* Be sure to refetch the stack pointer after calling these routines. */
2664 =head1 Callback Functions
2666 =for apidoc p||call_argv
2668 Performs a callback to the specified named and package-scoped Perl subroutine
2669 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2672 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2678 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2680 /* See G_* flags in cop.h */
2681 /* null terminated arg list */
2685 PERL_ARGS_ASSERT_CALL_ARGV;
2689 mXPUSHs(newSVpv(*argv,0));
2693 return call_pv(sub_name, flags);
2697 =for apidoc p||call_pv
2699 Performs a callback to the specified Perl sub. See L<perlcall>.
2705 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2706 /* name of the subroutine */
2707 /* See G_* flags in cop.h */
2709 PERL_ARGS_ASSERT_CALL_PV;
2711 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2715 =for apidoc p||call_method
2717 Performs a callback to the specified Perl method. The blessed object must
2718 be on the stack. See L<perlcall>.
2724 Perl_call_method(pTHX_ const char *methname, I32 flags)
2725 /* name of the subroutine */
2726 /* See G_* flags in cop.h */
2730 PERL_ARGS_ASSERT_CALL_METHOD;
2732 len = strlen(methname);
2733 sv = flags & G_METHOD_NAMED
2734 ? sv_2mortal(newSVpvn_share(methname, len,0))
2735 : newSVpvn_flags(methname, len, SVs_TEMP);
2737 return call_sv(sv, flags | G_METHOD);
2740 /* May be called with any of a CV, a GV, or an SV containing the name. */
2742 =for apidoc p||call_sv
2744 Performs a callback to the Perl sub specified by the SV.
2746 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2747 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2748 or C<SvPV(sv)> will be used as the name of the sub to call.
2750 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2751 C<SvPV(sv)> will be used as the name of the method to call.
2753 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2754 the name of the method to call.
2756 Some other values are treated specially for internal use and should
2765 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2766 /* See G_* flags in cop.h */
2769 LOGOP myop; /* fake syntax tree node */
2773 bool oldcatch = CATCH_GET;
2775 OP* const oldop = PL_op;
2778 PERL_ARGS_ASSERT_CALL_SV;
2780 if (flags & G_DISCARD) {
2784 if (!(flags & G_WANT)) {
2785 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2790 Zero(&myop, 1, LOGOP);
2791 if (!(flags & G_NOARGS))
2792 myop.op_flags |= OPf_STACKED;
2793 myop.op_flags |= OP_GIMME_REVERSE(flags);
2797 if (!(flags & G_METHOD_NAMED)) {
2805 if (PERLDB_SUB && PL_curstash != PL_debstash
2806 /* Handle first BEGIN of -d. */
2807 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2808 /* Try harder, since this may have been a sighandler, thus
2809 * curstash may be meaningless. */
2810 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2811 && !(flags & G_NODEBUG))
2812 myop.op_private |= OPpENTERSUB_DB;
2814 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2815 Zero(&method_op, 1, METHOP);
2816 method_op.op_next = (OP*)&myop;
2817 PL_op = (OP*)&method_op;
2818 if ( flags & G_METHOD_NAMED ) {
2819 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2820 method_op.op_type = OP_METHOD_NAMED;
2821 method_op.op_u.op_meth_sv = sv;
2823 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2824 method_op.op_type = OP_METHOD;
2826 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2827 myop.op_type = OP_ENTERSUB;
2830 if (!(flags & G_EVAL)) {
2832 CALL_BODY_SUB((OP*)&myop);
2833 retval = PL_stack_sp - (PL_stack_base + oldmark);
2834 CATCH_SET(oldcatch);
2838 myop.op_other = (OP*)&myop;
2840 old_cxix = cxstack_ix;
2841 create_eval_scope(NULL, flags|G_FAKINGEVAL);
2849 CALL_BODY_SUB((OP*)&myop);
2850 retval = PL_stack_sp - (PL_stack_base + oldmark);
2851 if (!(flags & G_KEEPERR)) {
2859 /* my_exit() was called */
2860 SET_CURSTASH(PL_defstash);
2864 NOT_REACHED; /* NOTREACHED */
2867 PL_restartjmpenv = NULL;
2868 PL_op = PL_restartop;
2872 PL_stack_sp = PL_stack_base + oldmark;
2873 if ((flags & G_WANT) == G_ARRAY)
2877 *++PL_stack_sp = &PL_sv_undef;
2882 /* if we croaked, depending on how we croaked the eval scope
2883 * may or may not have already been popped */
2884 if (cxstack_ix > old_cxix) {
2885 assert(cxstack_ix == old_cxix + 1);
2886 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
2887 delete_eval_scope();
2892 if (flags & G_DISCARD) {
2893 PL_stack_sp = PL_stack_base + oldmark;
2902 /* Eval a string. The G_EVAL flag is always assumed. */
2905 =for apidoc p||eval_sv
2907 Tells Perl to C<eval> the string in the SV. It supports the same flags
2908 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
2914 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2916 /* See G_* flags in cop.h */
2919 UNOP myop; /* fake syntax tree node */
2923 OP* const oldop = PL_op;
2926 PERL_ARGS_ASSERT_EVAL_SV;
2928 if (flags & G_DISCARD) {
2935 Zero(&myop, 1, UNOP);
2938 oldmark = SP - PL_stack_base;
2944 if (!(flags & G_NOARGS))
2945 myop.op_flags = OPf_STACKED;
2946 myop.op_type = OP_ENTEREVAL;
2947 myop.op_flags |= OP_GIMME_REVERSE(flags);
2948 if (flags & G_KEEPERR)
2949 myop.op_flags |= OPf_SPECIAL;
2951 if (flags & G_RE_REPARSING)
2952 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
2954 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2955 * before a cx_pusheval(), which corrupts the stack after a croak */
2956 TAINT_PROPER("eval_sv()");
2962 if (PL_op == (OP*)(&myop)) {
2963 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2965 goto fail; /* failed in compilation */
2968 retval = PL_stack_sp - (PL_stack_base + oldmark);
2969 if (!(flags & G_KEEPERR)) {
2977 /* my_exit() was called */
2978 SET_CURSTASH(PL_defstash);
2982 NOT_REACHED; /* NOTREACHED */
2985 PL_restartjmpenv = NULL;
2986 PL_op = PL_restartop;
2991 PL_stack_sp = PL_stack_base + oldmark;
2992 if ((flags & G_WANT) == G_ARRAY)
2996 *++PL_stack_sp = &PL_sv_undef;
3002 if (flags & G_DISCARD) {
3003 PL_stack_sp = PL_stack_base + oldmark;
3013 =for apidoc p||eval_pv
3015 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3021 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3023 SV* sv = newSVpv(p, 0);
3025 PERL_ARGS_ASSERT_EVAL_PV;
3027 eval_sv(sv, G_SCALAR);
3036 /* just check empty string or undef? */
3037 if (croak_on_error) {
3038 SV * const errsv = ERRSV;
3039 if(SvTRUE_NN(errsv))
3040 /* replace with croak_sv? */
3041 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3047 /* Require a module. */
3050 =head1 Embedding Functions
3052 =for apidoc p||require_pv
3054 Tells Perl to C<require> the file named by the string argument. It is
3055 analogous to the Perl code C<eval "require '$file'">. It's even
3056 implemented that way; consider using load_module instead.
3061 Perl_require_pv(pTHX_ const char *pv)
3066 PERL_ARGS_ASSERT_REQUIRE_PV;
3068 PUSHSTACKi(PERLSI_REQUIRE);
3069 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3070 eval_sv(sv_2mortal(sv), G_DISCARD);
3075 S_usage(pTHX) /* XXX move this out into a module ? */
3077 /* This message really ought to be max 23 lines.
3078 * Removed -h because the user already knows that option. Others? */
3080 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3081 minimum of 509 character string literals. */
3082 static const char * const usage_msg[] = {
3083 " -0[octal] specify record separator (\\0, if no argument)\n"
3084 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3085 " -C[number/list] enables the listed Unicode features\n"
3086 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3087 " -d[:debugger] run program under debugger\n"
3088 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3089 " -e program one line of program (several -e's allowed, omit programfile)\n"
3090 " -E program like -e, but enables all optional features\n"
3091 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3092 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3093 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3094 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3095 " -l[octal] enable line ending processing, specifies line terminator\n"
3096 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3097 " -n assume \"while (<>) { ... }\" loop around program\n"
3098 " -p assume loop like -n but print line also, like sed\n"
3099 " -s enable rudimentary parsing for switches after programfile\n"
3100 " -S look for programfile using PATH environment variable\n",
3101 " -t enable tainting warnings\n"
3102 " -T enable tainting checks\n"
3103 " -u dump core after parsing program\n"
3104 " -U allow unsafe operations\n"
3105 " -v print version, patchlevel and license\n"
3106 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3107 " -w enable many useful warnings\n"
3108 " -W enable all warnings\n"
3109 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3110 " -X disable all warnings\n"
3112 "Run 'perldoc perl' for more help with Perl.\n\n",
3115 const char * const *p = usage_msg;
3116 PerlIO *out = PerlIO_stdout();
3119 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3122 PerlIO_puts(out, *p++);
3126 /* convert a string of -D options (or digits) into an int.
3127 * sets *s to point to the char after the options */
3131 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3133 static const char * const usage_msgd[] = {
3134 " Debugging flag values: (see also -d)\n"
3135 " p Tokenizing and parsing (with v, displays parse stack)\n"
3136 " s Stack snapshots (with v, displays all stacks)\n"
3137 " l Context (loop) stack processing\n"
3138 " t Trace execution\n"
3139 " o Method and overloading resolution\n",
3140 " c String/numeric conversions\n"
3141 " P Print profiling info, source file input state\n"
3142 " m Memory and SV allocation\n"
3143 " f Format processing\n"
3144 " r Regular expression parsing and execution\n"
3145 " x Syntax tree dump\n",
3146 " u Tainting checks\n"
3147 " H Hash dump -- usurps values()\n"
3148 " X Scratchpad allocation\n"
3150 " S Op slab allocation\n"
3152 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3153 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3154 " v Verbose: use in conjunction with other flags\n"
3155 " C Copy On Write\n"
3156 " A Consistency checks on internal structures\n"
3157 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3158 " M trace smart match resolution\n"
3159 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3160 " L trace some locale setting information--for Perl core development\n",
3161 " i trace PerlIO layer processing\n",
3166 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3169 /* if adding extra options, remember to update DEBUG_MASK */
3170 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3172 for (; isWORDCHAR(**s); (*s)++) {
3173 const char * const d = strchr(debopts,**s);
3175 uv |= 1 << (d - debopts);
3176 else if (ckWARN_d(WARN_DEBUGGING))
3177 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3178 "invalid option -D%c, use -D'' to see choices\n", **s);
3181 else if (isDIGIT(**s)) {
3183 if (grok_atoUV(*s, &uv, &e))
3185 for (; isWORDCHAR(**s); (*s)++) ;
3187 else if (givehelp) {
3188 const char *const *p = usage_msgd;
3189 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3191 return (int)uv; /* ignore any UV->int conversion loss */
3195 /* This routine handles any switches that can be given during run */
3198 Perl_moreswitches(pTHX_ const char *s)
3202 const char option = *s; /* used to remember option in -m/-M code */
3204 PERL_ARGS_ASSERT_MORESWITCHES;
3212 SvREFCNT_dec(PL_rs);
3213 if (s[1] == 'x' && s[2]) {
3214 const char *e = s+=2;
3220 flags = PERL_SCAN_SILENT_ILLDIGIT;
3221 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3222 if (s + numlen < e) {
3223 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3227 PL_rs = newSVpvs("");
3228 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3229 uvchr_to_utf8(tmps, rschar);
3230 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3235 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3236 if (rschar & ~((U8)~0))
3237 PL_rs = &PL_sv_undef;
3238 else if (!rschar && numlen >= 2)
3239 PL_rs = newSVpvs("");
3241 char ch = (char)rschar;
3242 PL_rs = newSVpvn(&ch, 1);
3245 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3250 PL_unicode = parse_unicode_opts( (const char **)&s );
3251 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3259 while (*s && !isSPACE(*s)) ++s;
3260 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3272 forbid_setid('d', FALSE);
3275 /* -dt indicates to the debugger that threads will be used */
3276 if (*s == 't' && !isWORDCHAR(s[1])) {
3278 my_setenv("PERL5DB_THREADED", "1");
3281 /* The following permits -d:Mod to accepts arguments following an =
3282 in the fashion that -MSome::Mod does. */
3283 if (*s == ':' || *s == '=') {
3290 sv = newSVpvs("no Devel::");
3292 sv = newSVpvs("use Devel::");
3296 end = s + strlen(s);
3298 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3299 while(isWORDCHAR(*s) || *s==':') ++s;
3301 sv_catpvn(sv, start, end - start);
3303 sv_catpvn(sv, start, s-start);
3304 /* Don't use NUL as q// delimiter here, this string goes in the
3306 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3309 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3313 PL_perldb = PERLDB_ALL;
3320 forbid_setid('D', FALSE);
3322 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3323 #else /* !DEBUGGING */
3324 if (ckWARN_d(WARN_DEBUGGING))
3325 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3326 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3327 for (s++; isWORDCHAR(*s); s++) ;
3330 NOT_REACHED; /* NOTREACHED */
3334 NOT_REACHED; /* NOTREACHED */
3337 Safefree(PL_inplace);
3338 #if defined(__CYGWIN__) /* do backup extension automagically */
3339 if (*(s+1) == '\0') {
3340 PL_inplace = savepvs(".bak");
3343 #endif /* __CYGWIN__ */
3345 const char * const start = ++s;
3346 while (*s && !isSPACE(*s))
3349 PL_inplace = savepvn(start, s - start);
3353 if (*s == '-') /* Additional switches on #! line. */
3357 case 'I': /* -I handled both here and in parse_body() */
3358 forbid_setid('I', FALSE);
3360 while (*s && isSPACE(*s))
3365 /* ignore trailing spaces (possibly followed by other switches) */
3367 for (e = p; *e && !isSPACE(*e); e++) ;
3371 } while (*p && *p != '-');
3373 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3379 Perl_croak(aTHX_ "No directory specified for -I");
3385 SvREFCNT_dec(PL_ors_sv);
3391 PL_ors_sv = newSVpvs("\n");
3392 numlen = 3 + (*s == '0');
3393 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3397 if (RsPARA(PL_rs)) {
3398 PL_ors_sv = newSVpvs("\n\n");
3401 PL_ors_sv = newSVsv(PL_rs);
3406 forbid_setid('M', FALSE); /* XXX ? */
3409 forbid_setid('m', FALSE); /* XXX ? */
3414 const char *use = "use ";
3416 /* -M-foo == 'no foo' */
3417 /* Leading space on " no " is deliberate, to make both
3418 possibilities the same length. */
3419 if (*s == '-') { use = " no "; ++s; }
3420 sv = newSVpvn(use,4);
3422 /* We allow -M'Module qw(Foo Bar)' */
3423 while(isWORDCHAR(*s) || *s==':') {
3432 Perl_croak(aTHX_ "Module name required with -%c option",
3435 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3436 "contains single ':'",
3437 (int)(s - start), start, option);
3438 end = s + strlen(s);
3440 sv_catpvn(sv, start, end - start);
3441 if (option == 'm') {
3443 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3444 sv_catpvs( sv, " ()");
3447 sv_catpvn(sv, start, s-start);
3448 /* Use NUL as q''-delimiter. */
3449 sv_catpvs(sv, " split(/,/,q\0");
3451 sv_catpvn(sv, s, end - s);
3452 sv_catpvs(sv, "\0)");
3455 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3458 Perl_croak(aTHX_ "Missing argument to -%c", option);
3469 forbid_setid('s', FALSE);
3470 PL_doswitches = TRUE;
3475 #if defined(SILENT_NO_TAINT_SUPPORT)
3476 /* silently ignore */
3477 #elif defined(NO_TAINT_SUPPORT)
3478 Perl_croak_nocontext("This perl was compiled without taint support. "
3479 "Cowardly refusing to run with -t or -T flags");
3487 PL_do_undump = TRUE;
3497 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3498 PL_dowarn |= G_WARN_ON;
3503 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3504 if (!specialWARN(PL_compiling.cop_warnings))
3505 PerlMemShared_free(PL_compiling.cop_warnings);
3506 PL_compiling.cop_warnings = pWARN_ALL ;
3510 PL_dowarn = G_WARN_ALL_OFF;
3511 if (!specialWARN(PL_compiling.cop_warnings))
3512 PerlMemShared_free(PL_compiling.cop_warnings);
3513 PL_compiling.cop_warnings = pWARN_NONE ;
3520 if (s[0] == '-') /* Additional switches on #! line. */
3525 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3531 #ifdef ALTERNATE_SHEBANG
3532 case 'S': /* OS/2 needs -S on "extproc" line. */
3535 case 'e': case 'f': case 'x': case 'E':
3536 #ifndef ALTERNATE_SHEBANG
3540 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3543 "Unrecognized switch: -%.1s (-h will show valid options)",s
3553 PerlIO * PIO_stdout;
3555 const char * const level_str = "v" PERL_VERSION_STRING;
3556 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3557 #ifdef PERL_PATCHNUM
3559 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3560 static const char num [] = PERL_PATCHNUM "*";
3562 static const char num [] = PERL_PATCHNUM;
3565 const STRLEN num_len = sizeof(num)-1;
3566 /* A very advanced compiler would fold away the strnEQ
3567 and this whole conditional, but most (all?) won't do it.
3568 SV level could also be replaced by with preprocessor
3571 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3572 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3573 of the interp so it might contain format characters
3575 level = newSVpvn(num, num_len);
3577 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3581 SV* level = newSVpvn(level_str, level_len);
3582 #endif /* #ifdef PERL_PATCHNUM */
3583 PIO_stdout = PerlIO_stdout();
3584 PerlIO_printf(PIO_stdout,
3585 "\nThis is perl " STRINGIFY(PERL_REVISION)
3586 ", version " STRINGIFY(PERL_VERSION)
3587 ", subversion " STRINGIFY(PERL_SUBVERSION)
3588 " (%"SVf") built for " ARCHNAME, SVfARG(level)
3590 SvREFCNT_dec_NN(level);
3592 #if defined(LOCAL_PATCH_COUNT)
3593 if (LOCAL_PATCH_COUNT > 0)
3594 PerlIO_printf(PIO_stdout,
3595 "\n(with %d registered patch%s, "
3596 "see perl -V for more detail)",
3598 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3601 PerlIO_printf(PIO_stdout,
3602 "\n\nCopyright 1987-2016, Larry Wall\n");
3604 PerlIO_printf(PIO_stdout,
3605 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3608 PerlIO_printf(PIO_stdout,
3609 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3610 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3613 PerlIO_printf(PIO_stdout,
3614 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3615 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3618 PerlIO_printf(PIO_stdout,
3619 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3622 PerlIO_printf(PIO_stdout,
3623 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3626 PerlIO_printf(PIO_stdout,
3627 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3630 PerlIO_printf(PIO_stdout,
3631 "WINCE port by Rainer Keuchel, 2001-2002\n"
3632 "Built on " __DATE__ " " __TIME__ "\n\n");
3635 #ifdef __SYMBIAN32__
3636 PerlIO_printf(PIO_stdout,
3637 "Symbian port by Nokia, 2004-2005\n");
3639 #ifdef BINARY_BUILD_NOTICE
3640 BINARY_BUILD_NOTICE;
3642 PerlIO_printf(PIO_stdout,
3644 Perl may be copied only under the terms of either the Artistic License or the\n\
3645 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3646 Complete documentation for Perl, including FAQ lists, should be found on\n\
3647 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3648 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3652 /* compliments of Tom Christiansen */
3654 /* unexec() can be found in the Gnu emacs distribution */
3655 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3658 #include <lib$routines.h>
3662 Perl_my_unexec(pTHX)
3665 SV * prog = newSVpv(BIN_EXP, 0);
3666 SV * file = newSVpv(PL_origfilename, 0);
3670 sv_catpvs(prog, "/perl");
3671 sv_catpvs(file, ".perldump");
3673 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3674 /* unexec prints msg to stderr in case of failure */
3675 PerlProc_exit(status);
3677 PERL_UNUSED_CONTEXT;
3679 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3680 # elif defined(WIN32) || defined(__CYGWIN__)
3681 Perl_croak_nocontext("dump is not supported");
3683 ABORT(); /* for use with undump */
3688 /* initialize curinterp */
3693 # define PERLVAR(prefix,var,type)
3694 # define PERLVARA(prefix,var,n,type)
3695 # if defined(PERL_IMPLICIT_CONTEXT)
3696 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3697 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3699 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3700 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3702 # include "intrpvar.h"
3708 # define PERLVAR(prefix,var,type)
3709 # define PERLVARA(prefix,var,n,type)
3710 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3711 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3712 # include "intrpvar.h"
3722 S_init_main_stash(pTHX)
3726 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3727 /* We know that the string "main" will be in the global shared string
3728 table, so it's a small saving to use it rather than allocate another
3730 PL_curstname = newSVpvs_share("main");
3731 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3732 /* If we hadn't caused another reference to "main" to be in the shared
3733 string table above, then it would be worth reordering these two,
3734 because otherwise all we do is delete "main" from it as a consequence
3735 of the SvREFCNT_dec, only to add it again with hv_name_set */
3736 SvREFCNT_dec(GvHV(gv));
3737 hv_name_set(PL_defstash, "main", 4, 0);
3738 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3740 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3742 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3743 GvMULTI_on(PL_incgv);
3744 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3745 SvREFCNT_inc_simple_void(PL_hintgv);
3746 GvMULTI_on(PL_hintgv);
3747 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3748 SvREFCNT_inc_simple_void(PL_defgv);
3749 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3750 SvREFCNT_inc_simple_void(PL_errgv);
3751 GvMULTI_on(PL_errgv);
3752 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3753 SvREFCNT_inc_simple_void(PL_replgv);
3754 GvMULTI_on(PL_replgv);
3755 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3756 #ifdef PERL_DONT_CREATE_GVSV
3757 (void)gv_SVadd(PL_errgv);
3759 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3761 SET_CURSTASH(PL_defstash);
3762 CopSTASH_set(&PL_compiling, PL_defstash);
3763 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3764 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3766 /* We must init $/ before switches are processed. */
3767 sv_setpvs(get_sv("/", GV_ADD), "\n");
3771 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3774 PerlIO *rsfp = NULL;
3778 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3781 PL_origfilename = savepvs("-e");
3786 /* if find_script() returns, it returns a malloc()-ed value */
3787 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3789 if (strnEQ(scriptname, "/dev/fd/", 8)
3790 && isDIGIT(scriptname[8])
3791 && grok_atoUV(scriptname + 8, &uv, &s)
3792 && uv <= PERL_INT_MAX
3797 * Tell apart "normal" usage of fdscript, e.g.
3798 * with bash on FreeBSD:
3799 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3800 * from usage in suidperl.
3801 * Does any "normal" usage leave garbage after the number???
3802 * Is it a mistake to use a similar /dev/fd/ construct for
3807 * Be supersafe and do some sanity-checks.
3808 * Still, can we be sure we got the right thing?
3811 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3814 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3816 scriptname = savepv(s + 1);
3817 Safefree(PL_origfilename);
3818 PL_origfilename = (char *)scriptname;
3823 CopFILE_free(PL_curcop);
3824 CopFILE_set(PL_curcop, PL_origfilename);
3825 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3826 scriptname = (char *)"";
3827 if (fdscript >= 0) {
3828 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3830 else if (!*scriptname) {
3831 forbid_setid(0, *suidscript);
3835 #ifdef FAKE_BIT_BUCKET
3836 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3837 * is called) and still have the "-e" work. (Believe it or not,
3838 * a /dev/null is required for the "-e" to work because source
3839 * filter magic is used to implement it. ) This is *not* a general
3840 * replacement for a /dev/null. What we do here is create a temp
3841 * file (an empty file), open up that as the script, and then
3842 * immediately close and unlink it. Close enough for jazz. */
3843 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3844 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3845 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3846 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3847 FAKE_BIT_BUCKET_TEMPLATE
3849 const char * const err = "Failed to create a fake bit bucket";
3850 if (strEQ(scriptname, BIT_BUCKET)) {
3851 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3852 int old_umask = umask(0177);
3853 int tmpfd = mkstemp(tmpname);
3856 scriptname = tmpname;
3859 Perl_croak(aTHX_ err);
3862 scriptname = mktemp(tmpname);
3864 Perl_croak(aTHX_ err);
3869 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3870 #ifdef FAKE_BIT_BUCKET
3871 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3872 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3873 && strlen(scriptname) == sizeof(tmpname) - 1) {
3876 scriptname = BIT_BUCKET;
3880 /* PSz 16 Sep 03 Keep neat error message */
3882 Perl_croak(aTHX_ "Can't open "BIT_BUCKET": %s\n", Strerror(errno));
3884 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3885 CopFILE(PL_curcop), Strerror(errno));
3887 fd = PerlIO_fileno(rsfp);
3888 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
3890 /* ensure close-on-exec */
3891 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
3892 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3893 CopFILE(PL_curcop), Strerror(errno));
3899 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
3900 && S_ISDIR(tmpstatbuf.st_mode)))
3901 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3909 * I_SYSSTATVFS HAS_FSTATVFS
3911 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3912 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3913 * here so that metaconfig picks them up. */
3916 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3917 /* Don't even need this function. */
3920 S_validate_suid(pTHX_ PerlIO *rsfp)
3922 const Uid_t my_uid = PerlProc_getuid();
3923 const Uid_t my_euid = PerlProc_geteuid();
3924 const Gid_t my_gid = PerlProc_getgid();
3925 const Gid_t my_egid = PerlProc_getegid();
3927 PERL_ARGS_ASSERT_VALIDATE_SUID;
3929 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3931 int fd = PerlIO_fileno(rsfp);
3933 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
3934 Perl_croak_nocontext( "Illegal suidscript");
3936 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
3938 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
3941 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3942 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3943 /* not set-id, must be wrapped */
3946 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3949 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3954 PERL_ARGS_ASSERT_FIND_BEGINNING;
3956 /* skip forward in input to the real script? */
3959 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3960 Perl_croak(aTHX_ "No Perl script found in input\n");
3962 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3963 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3964 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3966 while (*s == ' ' || *s == '\t') s++;
3968 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3969 || s2[-1] == '_') s2--;
3970 if (strnEQ(s2-4,"perl",4))
3971 while ((s = moreswitches(s)))
3980 /* no need to do anything here any more if we don't
3982 #ifndef NO_TAINT_SUPPORT
3983 const Uid_t my_uid = PerlProc_getuid();
3984 const Uid_t my_euid = PerlProc_geteuid();
3985 const Gid_t my_gid = PerlProc_getgid();
3986 const Gid_t my_egid = PerlProc_getegid();
3988 PERL_UNUSED_CONTEXT;
3990 /* Should not happen: */
3991 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3992 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
3996 * Should go by suidscript, not uid!=euid: why disallow
3997 * system("ls") in scripts run from setuid things?
3998 * Or, is this run before we check arguments and set suidscript?
3999 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
4000 * (We never have suidscript, can we be sure to have fdscript?)
4001 * Or must then go by UID checks? See comments in forbid_setid also.
4005 /* This is used very early in the lifetime of the program,
4006 * before even the options are parsed, so PL_tainting has
4007 * not been initialized properly. */
4009 Perl_doing_taint(int argc, char *argv[], char *envp[])
4011 #ifndef PERL_IMPLICIT_SYS
4012 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4013 * before we have an interpreter-- and the whole point of this
4014 * function is to be called at such an early stage. If you are on
4015 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4016 * "tainted because running with altered effective ids', you'll
4017 * have to add your own checks somewhere in here. The two most
4018 * known samples of 'implicitness' are Win32 and NetWare, neither
4019 * of which has much of concept of 'uids'. */
4020 Uid_t uid = PerlProc_getuid();
4021 Uid_t euid = PerlProc_geteuid();
4022 Gid_t gid = PerlProc_getgid();
4023 Gid_t egid = PerlProc_getegid();
4030 if (uid && (euid != uid || egid != gid))
4032 #endif /* !PERL_IMPLICIT_SYS */
4033 /* This is a really primitive check; environment gets ignored only
4034 * if -T are the first chars together; otherwise one gets
4035 * "Too late" message. */
4036 if ( argc > 1 && argv[1][0] == '-'
4037 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4042 /* Passing the flag as a single char rather than a string is a slight space
4043 optimisation. The only message that isn't /^-.$/ is
4044 "program input from stdin", which is substituted in place of '\0', which
4045 could never be a command line flag. */
4047 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4049 char string[3] = "-x";
4050 const char *message = "program input from stdin";
4052 PERL_UNUSED_CONTEXT;
4058 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4059 if (PerlProc_getuid() != PerlProc_geteuid())
4060 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4061 if (PerlProc_getgid() != PerlProc_getegid())
4062 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4063 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4065 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4069 Perl_init_dbargs(pTHX)
4071 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4076 /* Someone has already created it.
4077 It might have entries, and if we just turn off AvREAL(), they will
4078 "leak" until global destruction. */
4080 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4081 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4083 AvREIFY_only(PL_dbargs);
4087 Perl_init_debugger(pTHX)
4089 HV * const ostash = PL_curstash;
4092 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4094 Perl_init_dbargs(aTHX);
4095 PL_DBgv = MUTABLE_GV(
4096 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4098 PL_DBline = MUTABLE_GV(
4099 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4101 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4102 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4104 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4105 if (!SvIOK(PL_DBsingle))
4106 sv_setiv(PL_DBsingle, 0);
4107 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4108 mg->mg_private = DBVARMG_SINGLE;
4109 SvSETMAGIC(PL_DBsingle);
4111 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4112 if (!SvIOK(PL_DBtrace))
4113 sv_setiv(PL_DBtrace, 0);
4114 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4115 mg->mg_private = DBVARMG_TRACE;
4116 SvSETMAGIC(PL_DBtrace);
4118 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4119 if (!SvIOK(PL_DBsignal))
4120 sv_setiv(PL_DBsignal, 0);
4121 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4122 mg->mg_private = DBVARMG_SIGNAL;
4123 SvSETMAGIC(PL_DBsignal);
4125 SvREFCNT_dec(PL_curstash);
4126 PL_curstash = ostash;
4129 #ifndef STRESS_REALLOC
4130 #define REASONABLE(size) (size)
4131 #define REASONABLE_but_at_least(size,min) (size)
4133 #define REASONABLE(size) (1) /* unreasonable */
4134 #define REASONABLE_but_at_least(size,min) (min)
4138 Perl_init_stacks(pTHX)
4142 /* start with 128-item stack and 8K cxstack */
4143 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4144 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4145 PL_curstackinfo->si_type = PERLSI_MAIN;
4146 PL_curstack = PL_curstackinfo->si_stack;
4147 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4149 PL_stack_base = AvARRAY(PL_curstack);
4150 PL_stack_sp = PL_stack_base;
4151 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4153 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4156 PL_tmps_max = REASONABLE(128);
4158 Newx(PL_markstack,REASONABLE(32),I32);
4159 PL_markstack_ptr = PL_markstack;
4160 PL_markstack_max = PL_markstack + REASONABLE(32);
4164 Newx(PL_scopestack,REASONABLE(32),I32);
4166 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4168 PL_scopestack_ix = 0;
4169 PL_scopestack_max = REASONABLE(32);
4171 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4172 Newx(PL_savestack, size, ANY);
4173 PL_savestack_ix = 0;
4174 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4175 PL_savestack_max = size - SS_MAXPUSH;
4183 while (PL_curstackinfo->si_next)
4184 PL_curstackinfo = PL_curstackinfo->si_next;
4185 while (PL_curstackinfo) {
4186 PERL_SI *p = PL_curstackinfo->si_prev;
4187 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4188 Safefree(PL_curstackinfo->si_cxstack);
4189 Safefree(PL_curstackinfo);
4190 PL_curstackinfo = p;
4192 Safefree(PL_tmps_stack);
4193 Safefree(PL_markstack);
4194 Safefree(PL_scopestack);
4196 Safefree(PL_scopestack_name);
4198 Safefree(PL_savestack);
4202 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4204 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4205 AV *const isa = GvAVn(gv);
4208 PERL_ARGS_ASSERT_POPULATE_ISA;
4210 if(AvFILLp(isa) != -1)
4213 /* NOTE: No support for tied ISA */
4215 va_start(args, len);
4217 const char *const parent = va_arg(args, const char*);
4222 parent_len = va_arg(args, size_t);
4224 /* Arguments are supplied with a trailing :: */
4225 assert(parent_len > 2);
4226 assert(parent[parent_len - 1] == ':');
4227 assert(parent[parent_len - 2] == ':');
4228 av_push(isa, newSVpvn(parent, parent_len - 2));
4229 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4236 S_init_predump_symbols(pTHX)
4241 sv_setpvs(get_sv("\"", GV_ADD), " ");
4242 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4245 /* Historically, PVIOs were blessed into IO::Handle, unless
4246 FileHandle was loaded, in which case they were blessed into
4247 that. Action at a distance.
4248 However, if we simply bless into IO::Handle, we break code
4249 that assumes that PVIOs will have (among others) a seek
4250 method. IO::File inherits from IO::Handle and IO::Seekable,
4251 and provides the needed methods. But if we simply bless into
4252 it, then we break code that assumed that by loading
4253 IO::Handle, *it* would work.
4254 So a compromise is to set up the correct @IO::File::ISA,
4255 so that code that does C<use IO::Handle>; will still work.
4258 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4259 STR_WITH_LEN("IO::Handle::"),
4260 STR_WITH_LEN("IO::Seekable::"),
4261 STR_WITH_LEN("Exporter::"),
4264 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4265 GvMULTI_on(PL_stdingv);
4266 io = GvIOp(PL_stdingv);
4267 IoTYPE(io) = IoTYPE_RDONLY;
4268 IoIFP(io) = PerlIO_stdin();
4269 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4271 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4273 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4276 IoTYPE(io) = IoTYPE_WRONLY;
4277 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4279 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4281 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4283 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4284 GvMULTI_on(PL_stderrgv);
4285 io = GvIOp(PL_stderrgv);
4286 IoTYPE(io) = IoTYPE_WRONLY;
4287 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4288 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4290 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4292 PL_statname = newSVpvs(""); /* last filename we did stat on */
4296 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4298 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4300 argc--,argv++; /* skip name of script */
4301 if (PL_doswitches) {
4302 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4306 if (argv[0][1] == '-' && !argv[0][2]) {
4310 if ((s = strchr(argv[0], '='))) {
4311 const char *const start_name = argv[0] + 1;
4312 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4313 TRUE, SVt_PV)), s + 1);
4316 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4319 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4320 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4321 GvMULTI_on(PL_argvgv);
4322 av_clear(GvAVn(PL_argvgv));
4323 for (; argc > 0; argc--,argv++) {
4324 SV * const sv = newSVpv(argv[0],0);
4325 av_push(GvAV(PL_argvgv),sv);
4326 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4327 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4330 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4331 (void)sv_utf8_decode(sv);
4335 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4336 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4337 "-i used with no filenames on the command line, "
4338 "reading from STDIN");
4342 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4349 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4351 PL_toptarget = newSV_type(SVt_PVIV);
4352 sv_setpvs(PL_toptarget, "");
4353 PL_bodytarget = newSV_type(SVt_PVIV);
4354 sv_setpvs(PL_bodytarget, "");
4355 PL_formtarget = PL_bodytarget;
4359 init_argv_symbols(argc,argv);
4361 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4362 sv_setpv(GvSV(tmpgv),PL_origfilename);
4364 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4366 bool env_is_not_environ;
4367 SvREFCNT_inc_simple_void_NN(PL_envgv);
4368 GvMULTI_on(PL_envgv);
4369 hv = GvHVn(PL_envgv);
4370 hv_magic(hv, NULL, PERL_MAGIC_env);
4372 #ifdef USE_ENVIRON_ARRAY
4373 /* Note that if the supplied env parameter is actually a copy
4374 of the global environ then it may now point to free'd memory
4375 if the environment has been modified since. To avoid this
4376 problem we treat env==NULL as meaning 'use the default'
4380 env_is_not_environ = env != environ;
4381 if (env_is_not_environ
4382 # ifdef USE_ITHREADS
4383 && PL_curinterp == aTHX
4395 for (; *env; env++) {
4398 if (!(s = strchr(old_var,'=')) || s == old_var)
4402 #if defined(MSDOS) && !defined(DJGPP)
4404 (void)strupr(old_var);
4407 if (hv_exists(hv, old_var, nlen)) {
4408 const char *name = savepvn(old_var, nlen);
4410 /* make sure we use the same value as getenv(), otherwise code that
4411 uses getenv() (like setlocale()) might see a different value to %ENV
4413 sv = newSVpv(PerlEnv_getenv(name), 0);
4415 /* keep a count of the dups of this name so we can de-dup environ later */
4416 if (hv_exists(dups, name, nlen))
4417 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4419 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4424 sv = newSVpv(s+1, 0);
4426 (void)hv_store(hv, old_var, nlen, sv, 0);
4427 if (env_is_not_environ)
4431 /* environ has some duplicate definitions, remove them */
4434 while ((entry = hv_iternext_flags(dups, 0))) {
4436 const char *name = HePV(entry, nlen);
4437 IV count = SvIV(HeVAL(entry));
4439 SV **valp = hv_fetch(hv, name, nlen, 0);
4443 /* try to remove any duplicate names, depending on the
4444 * implementation used in my_setenv() the iteration might
4445 * not be necessary, but let's be safe.
4447 for (i = 0; i < count; ++i)
4450 /* and set it back to the value we set $ENV{name} to */
4451 my_setenv(name, SvPV_nolen(*valp));
4454 SvREFCNT_dec_NN(dups);
4456 #endif /* USE_ENVIRON_ARRAY */
4457 #endif /* !PERL_MICRO */
4461 /* touch @F array to prevent spurious warnings 20020415 MJD */
4463 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4468 S_init_perllib(pTHX)
4471 const char *perl5lib = NULL;
4474 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4478 if (!TAINTING_get) {
4480 perl5lib = PerlEnv_getenv("PERL5LIB");
4482 * It isn't possible to delete an environment variable with
4483 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4484 * case we treat PERL5LIB as undefined if it has a zero-length value.
4486 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4487 if (perl5lib && *perl5lib != '\0')
4491 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4493 s = PerlEnv_getenv("PERLLIB");
4495 incpush_use_sep(s, 0, 0);
4498 /* Treat PERL5?LIB as a possible search list logical name -- the
4499 * "natural" VMS idiom for a Unix path string. We allow each
4500 * element to be a set of |-separated directories for compatibility.
4504 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4506 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4507 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4509 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4510 incpush_use_sep(buf, 0, 0);
4515 #ifndef PERL_IS_MINIPERL
4516 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4517 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4519 /* Use the ~-expanded versions of APPLLIB (undocumented),
4520 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4523 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4524 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4528 /* sitearch is always relative to sitelib on Windows for
4529 * DLL-based path intuition to work correctly */
4530 # if !defined(WIN32)
4531 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4532 INCPUSH_CAN_RELOCATE);
4538 /* this picks up sitearch as well */
4539 s = PerlEnv_sitelib_path(PERL_FS_VERSION, &len);
4541 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4543 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4547 #ifdef PERL_VENDORARCH_EXP
4548 /* vendorarch is always relative to vendorlib on Windows for
4549 * DLL-based path intuition to work correctly */
4550 # if !defined(WIN32)
4551 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4552 INCPUSH_CAN_RELOCATE);
4556 #ifdef PERL_VENDORLIB_EXP
4558 /* this picks up vendorarch as well */
4559 s = PerlEnv_vendorlib_path(PERL_FS_VERSION, &len);
4561 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4563 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4564 INCPUSH_CAN_RELOCATE);
4569 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4573 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4577 s = PerlEnv_lib_path(PERL_FS_VERSION, &len);
4579 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4582 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4584 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4588 #ifdef PERL_OTHERLIBDIRS
4589 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4590 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4591 |INCPUSH_CAN_RELOCATE);
4594 if (!TAINTING_get) {
4597 * It isn't possible to delete an environment variable with
4598 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4599 * case we treat PERL5LIB as undefined if it has a zero-length value.
4601 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4602 if (perl5lib && *perl5lib != '\0')
4606 incpush_use_sep(perl5lib, 0,
4607 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4609 /* Treat PERL5?LIB as a possible search list logical name -- the
4610 * "natural" VMS idiom for a Unix path string. We allow each
4611 * element to be a set of |-separated directories for compatibility.
4615 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4617 incpush_use_sep(buf, 0,
4618 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4619 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4623 /* Use the ~-expanded versions of APPLLIB (undocumented),
4624 SITELIB and VENDORLIB for older versions
4627 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4628 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4631 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4632 /* Search for version-specific dirs below here */
4633 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4634 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4638 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4639 /* Search for version-specific dirs below here */
4640 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4641 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4644 #ifdef PERL_OTHERLIBDIRS
4645 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4646 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4647 |INCPUSH_CAN_RELOCATE);
4649 #endif /* !PERL_IS_MINIPERL */
4652 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4655 #if defined(DOSISH) || defined(__SYMBIAN32__)
4656 # define PERLLIB_SEP ';'
4659 # define PERLLIB_SEP PL_perllib_sep
4661 # define PERLLIB_SEP ':'
4664 #ifndef PERLLIB_MANGLE
4665 # define PERLLIB_MANGLE(s,n) (s)
4668 #ifndef PERL_IS_MINIPERL
4669 /* Push a directory onto @INC if it exists.
4670 Generate a new SV if we do this, to save needing to copy the SV we push
4673 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4677 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4679 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4680 S_ISDIR(tmpstatbuf.st_mode)) {
4682 dir = newSVsv(stem);
4684 /* Truncate dir back to stem. */
4685 SvCUR_set(dir, SvCUR(stem));
4692 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4694 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4697 PERL_ARGS_ASSERT_MAYBERELOCATE;
4700 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4701 defined to so something (in os2/os2.c), but the code has been
4702 this way, ignoring any possible changed of length, since
4703 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4705 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4711 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4713 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4714 sv_usepvn(libdir,unix,len);
4717 PerlIO_printf(Perl_error_log,
4718 "Failed to unixify @INC element \"%s\"\n",
4719 SvPV_nolen_const(libdir));
4723 /* Do the if() outside the #ifdef to avoid warnings about an unused
4726 #ifdef PERL_RELOCATABLE_INC
4728 * Relocatable include entries are marked with a leading .../
4731 * 0: Remove that leading ".../"
4732 * 1: Remove trailing executable name (anything after the last '/')
4733 * from the perl path to give a perl prefix
4735 * While the @INC element starts "../" and the prefix ends with a real
4736 * directory (ie not . or ..) chop that real directory off the prefix
4737 * and the leading "../" from the @INC element. ie a logical "../"
4739 * Finally concatenate the prefix and the remainder of the @INC element
4740 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4741 * generates /usr/local/lib/perl5
4743 const char *libpath = SvPVX(libdir);
4744 STRLEN libpath_len = SvCUR(libdir);
4745 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4747 SV * const caret_X = get_sv("\030", 0);
4748 /* Going to use the SV just as a scratch buffer holding a C
4754 /* $^X is *the* source of taint if tainting is on, hence
4755 SvPOK() won't be true. */
4757 assert(SvPOKp(caret_X));
4758 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4760 /* Firstly take off the leading .../
4761 If all else fail we'll do the paths relative to the current
4763 sv_chop(libdir, libpath + 4);
4764 /* Don't use SvPV as we're intentionally bypassing taining,
4765 mortal copies that the mg_get of tainting creates, and
4766 corruption that seems to come via the save stack.
4767 I guess that the save stack isn't correctly set up yet. */
4768 libpath = SvPVX(libdir);
4769 libpath_len = SvCUR(libdir);
4771 /* This would work more efficiently with memrchr, but as it's
4772 only a GNU extension we'd need to probe for it and
4773 implement our own. Not hard, but maybe not worth it? */
4775 prefix = SvPVX(prefix_sv);
4776 lastslash = strrchr(prefix, '/');
4778 /* First time in with the *lastslash = '\0' we just wipe off
4779 the trailing /perl from (say) /usr/foo/bin/perl
4783 while ((*lastslash = '\0'), /* Do that, come what may. */
4784 (libpath_len >= 3 && memEQ(libpath, "../", 3)
4785 && (lastslash = strrchr(prefix, '/')))) {
4786 if (lastslash[1] == '\0'
4787 || (lastslash[1] == '.'
4788 && (lastslash[2] == '/' /* ends "/." */
4789 || (lastslash[2] == '/'
4790 && lastslash[3] == '/' /* or "/.." */
4792 /* Prefix ends "/" or "/." or "/..", any of which
4793 are fishy, so don't do any more logical cleanup.
4797 /* Remove leading "../" from path */
4800 /* Next iteration round the loop removes the last
4801 directory name from prefix by writing a '\0' in
4802 the while clause. */
4804 /* prefix has been terminated with a '\0' to the correct
4805 length. libpath points somewhere into the libdir SV.
4806 We need to join the 2 with '/' and drop the result into
4808 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4809 SvREFCNT_dec(libdir);
4810 /* And this is the new libdir. */
4813 (PerlProc_getuid() != PerlProc_geteuid() ||
4814 PerlProc_getgid() != PerlProc_getegid())) {
4815 /* Need to taint relocated paths if running set ID */
4816 SvTAINTED_on(libdir);
4819 SvREFCNT_dec(prefix_sv);
4827 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4829 #ifndef PERL_IS_MINIPERL
4830 const U8 using_sub_dirs
4831 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4832 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4833 const U8 add_versioned_sub_dirs
4834 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4835 const U8 add_archonly_sub_dirs
4836 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4837 #ifdef PERL_INC_VERSION_LIST
4838 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4841 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4842 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4843 AV *const inc = GvAVn(PL_incgv);
4845 PERL_ARGS_ASSERT_INCPUSH;
4848 /* Could remove this vestigial extra block, if we don't mind a lot of
4849 re-indenting diff noise. */
4851 SV *const libdir = mayberelocate(dir, len, flags);
4852 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4853 arranged to unshift #! line -I onto the front of @INC. However,
4854 -I can add version and architecture specific libraries, and they
4855 need to go first. The old code assumed that it was always
4856 pushing. Hence to make it work, need to push the architecture
4857 (etc) libraries onto a temporary array, then "unshift" that onto
4858 the front of @INC. */
4859 #ifndef PERL_IS_MINIPERL
4860 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4863 * BEFORE pushing libdir onto @INC we may first push version- and
4864 * archname-specific sub-directories.
4866 if (using_sub_dirs) {
4867 SV *subdir = newSVsv(libdir);
4868 #ifdef PERL_INC_VERSION_LIST
4869 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4870 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4871 const char * const *incver;
4874 if (add_versioned_sub_dirs) {
4875 /* .../version/archname if -d .../version/archname */
4876 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4877 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4879 /* .../version if -d .../version */
4880 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4881 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4884 #ifdef PERL_INC_VERSION_LIST
4886 for (incver = incverlist; *incver; incver++) {
4887 /* .../xxx if -d .../xxx */
4888 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4889 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4894 if (add_archonly_sub_dirs) {
4895 /* .../archname if -d .../archname */
4896 sv_catpvs(subdir, "/" ARCHNAME);
4897 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4901 assert (SvREFCNT(subdir) == 1);
4902 SvREFCNT_dec(subdir);
4904 #endif /* !PERL_IS_MINIPERL */
4905 /* finally add this lib directory at the end of @INC */
4907 #ifdef PERL_IS_MINIPERL
4908 const Size_t extra = 0;
4910 Size_t extra = av_tindex(av) + 1;
4912 av_unshift(inc, extra + push_basedir);
4914 av_store(inc, extra, libdir);
4915 #ifndef PERL_IS_MINIPERL
4917 /* av owns a reference, av_store() expects to be donated a
4918 reference, and av expects to be sane when it's cleared.
4919 If I wanted to be naughty and wrong, I could peek inside the
4920 implementation of av_clear(), realise that it uses
4921 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4922 and so directly steal from it (with a memcpy() to inc, and
4923 then memset() to NULL them out. But people copy code from the
4924 core expecting it to be best practise, so let's use the API.
4925 Although studious readers will note that I'm not checking any
4927 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4932 else if (push_basedir) {
4933 av_push(inc, libdir);
4936 if (!push_basedir) {
4937 assert (SvREFCNT(libdir) == 1);
4938 SvREFCNT_dec(libdir);
4944 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4948 /* This logic has been broken out from S_incpush(). It may be possible to
4951 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4953 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4954 * argument to incpush_use_sep. This allows creation of relocatable
4955 * Perl distributions that patch the binary at install time. Those
4956 * distributions will have to provide their own relocation tools; this
4957 * is not a feature otherwise supported by core Perl.
4959 #ifndef PERL_RELOCATABLE_INCPUSH
4966 /* Break at all separators */
4967 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4969 /* skip any consecutive separators */
4971 /* Uncomment the next line for PATH semantics */
4972 /* But you'll need to write tests */
4973 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4975 incpush(p, (STRLEN)(s - p), flags);
4980 incpush(p, (STRLEN)(end - p), flags);
4985 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4988 VOL const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4994 PERL_ARGS_ASSERT_CALL_LIST;
4996 while (av_tindex(paramList) >= 0) {
4997 cv = MUTABLE_CV(av_shift(paramList));
4999 if (paramList == PL_beginav) {
5000 /* save PL_beginav for compiler */
5001 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5003 else if (paramList == PL_checkav) {
5004 /* save PL_checkav for compiler */
5005 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5007 else if (paramList == PL_unitcheckav) {
5008 /* save PL_unitcheckav for compiler */
5009 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5019 (void)SvPV_const(atsv, len);
5021 PL_curcop = &PL_compiling;
5022 CopLINE_set(PL_curcop, oldline);
5023 if (paramList == PL_beginav)
5024 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5026 Perl_sv_catpvf(aTHX_ atsv,
5027 "%s failed--call queue aborted",
5028 paramList == PL_checkav ? "CHECK"
5029 : paramList == PL_initav ? "INIT"
5030 : paramList == PL_unitcheckav ? "UNITCHECK"
5032 while (PL_scopestack_ix > oldscope)
5035 Perl_croak(aTHX_ "%"SVf"", SVfARG(atsv));
5042 /* my_exit() was called */
5043 while (PL_scopestack_ix > oldscope)
5046 SET_CURSTASH(PL_defstash);
5047 PL_curcop = &PL_compiling;
5048 CopLINE_set(PL_curcop, oldline);
5051 NOT_REACHED; /* NOTREACHED */
5054 PL_curcop = &PL_compiling;
5055 CopLINE_set(PL_curcop, oldline);
5058 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5067 Perl_my_exit(pTHX_ U32 status)
5069 if (PL_exit_flags & PERL_EXIT_ABORT) {
5072 if (PL_exit_flags & PERL_EXIT_WARN) {
5073 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5074 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5075 PL_exit_flags &= ~PERL_EXIT_ABORT;
5085 STATUS_EXIT_SET(status);
5092 Perl_my_failure_exit(pTHX)
5095 /* We have been called to fall on our sword. The desired exit code
5096 * should be already set in STATUS_UNIX, but could be shifted over
5097 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5100 * If an error code has not been set, then force the issue.
5102 if (MY_POSIX_EXIT) {
5104 /* According to the die_exit.t tests, if errno is non-zero */
5105 /* It should be used for the error status. */
5107 if (errno == EVMSERR) {
5108 STATUS_NATIVE = vaxc$errno;
5111 /* According to die_exit.t tests, if the child_exit code is */
5112 /* also zero, then we need to exit with a code of 255 */
5113 if ((errno != 0) && (errno < 256))
5114 STATUS_UNIX_EXIT_SET(errno);
5115 else if (STATUS_UNIX < 255) {
5116 STATUS_UNIX_EXIT_SET(255);
5121 /* The exit code could have been set by $? or vmsish which
5122 * means that it may not have fatal set. So convert
5123 * success/warning codes to fatal with out changing
5124 * the POSIX status code. The severity makes VMS native
5125 * status handling work, while UNIX mode programs use the
5126 * the POSIX exit codes.
5128 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5129 STATUS_NATIVE &= STS$M_COND_ID;
5130 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5134 /* Traditionally Perl on VMS always expects a Fatal Error. */
5135 if (vaxc$errno & 1) {
5137 /* So force success status to failure */
5138 if (STATUS_NATIVE & 1)
5143 STATUS_UNIX = EINTR; /* In case something cares */
5148 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5150 /* Encode the severity code */
5151 severity = STATUS_NATIVE & STS$M_SEVERITY;
5152 STATUS_UNIX = (severity ? severity : 1) << 8;
5154 /* Perl expects this to be a fatal error */
5155 if (severity != STS$K_SEVERE)
5164 STATUS_UNIX_SET(errno);
5166 exitstatus = STATUS_UNIX >> 8;
5167 if (exitstatus & 255)
5168 STATUS_UNIX_SET(exitstatus);
5170 STATUS_UNIX_SET(255);
5173 if (PL_exit_flags & PERL_EXIT_ABORT) {
5176 if (PL_exit_flags & PERL_EXIT_WARN) {
5177 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5178 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5179 PL_exit_flags &= ~PERL_EXIT_ABORT;
5185 S_my_exit_jump(pTHX)
5188 SvREFCNT_dec(PL_e_script);
5192 POPSTACK_TO(PL_mainstack);
5193 if (cxstack_ix >= 0) {
5195 cx_popblock(cxstack);
5203 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5205 const char * const p = SvPVX_const(PL_e_script);
5206 const char *nl = strchr(p, '\n');
5208 PERL_UNUSED_ARG(idx);
5209 PERL_UNUSED_ARG(maxlen);
5211 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5213 filter_del(read_e_script);
5216 sv_catpvn(buf_sv, p, nl-p);
5217 sv_chop(PL_e_script, nl);
5221 /* removes boilerplate code at the end of each boot_Module xsub */
5223 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5226 call_list(PL_scopestack_ix, PL_unitcheckav);
5231 * ex: set ts=8 sts=4 sw=4 et: