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 SvPVCLEAR(PERL_DEBUG_PAD(0)); /* For regex debugging. */
299 SvPVCLEAR(PERL_DEBUG_PAD(1)); /* ext/re needs these */
300 SvPVCLEAR(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_deletes(hv, "main::", 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 ");"
1288 "serial %" UVuf "\n",
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 * PL_utf8locale is conditionally turned on by
2304 * locale.c:Perl_init_i18nl10n() if the environment
2305 * look like the user wants to use UTF-8. */
2306 #if defined(__SYMBIAN32__)
2307 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2309 # ifndef PERL_IS_MINIPERL
2311 /* Requires init_predump_symbols(). */
2312 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2317 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2318 * and the default open disciplines. */
2319 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2320 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2322 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2323 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2324 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2326 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2327 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2328 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2330 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2331 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2332 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2334 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2335 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2338 sv_setpvs(sv, ":utf8\0:utf8");
2340 sv_setpvs(sv, ":utf8\0");
2343 sv_setpvs(sv, "\0:utf8");
2352 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2353 if (strEQ(s, "unsafe"))
2354 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2355 else if (strEQ(s, "safe"))
2356 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2358 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2363 lex_start(linestr_sv, rsfp, lex_start_flags);
2364 SvREFCNT_dec(linestr_sv);
2366 PL_subname = newSVpvs("main");
2368 if (add_read_e_script)
2369 filter_add(read_e_script, NULL);
2371 /* now parse the script */
2373 SETERRNO(0,SS_NORMAL);
2374 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2376 Perl_croak(aTHX_ "%s had compilation errors.\n", PL_origfilename);
2378 Perl_croak(aTHX_ "Execution of %s aborted due to compilation errors.\n",
2382 CopLINE_set(PL_curcop, 0);
2383 SET_CURSTASH(PL_defstash);
2385 SvREFCNT_dec(PL_e_script);
2393 SAVECOPFILE(PL_curcop);
2394 SAVECOPLINE(PL_curcop);
2395 gv_check(PL_defstash);
2405 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2406 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2407 dump_mstats("after compilation:");
2412 PL_restartjmpenv = NULL;
2418 =for apidoc perl_run
2420 Tells a Perl interpreter to run. See L<perlembed>.
2432 PERL_ARGS_ASSERT_PERL_RUN;
2433 #ifndef MULTIPLICITY
2434 PERL_UNUSED_ARG(my_perl);
2437 oldscope = PL_scopestack_ix;
2445 cxstack_ix = -1; /* start context stack again */
2447 case 0: /* normal completion */
2451 case 2: /* my_exit() */
2452 while (PL_scopestack_ix > oldscope)
2455 SET_CURSTASH(PL_defstash);
2456 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2457 PL_endav && !PL_minus_c) {
2458 PERL_SET_PHASE(PERL_PHASE_END);
2459 call_list(oldscope, PL_endav);
2462 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2463 dump_mstats("after execution: ");
2469 POPSTACK_TO(PL_mainstack);
2472 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2483 S_run_body(pTHX_ I32 oldscope)
2485 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2486 PL_sawampersand ? "Enabling" : "Omitting",
2487 (unsigned int)(PL_sawampersand)));
2489 if (!PL_restartop) {
2491 if (DEBUG_x_TEST || DEBUG_B_TEST)
2492 dump_all_perl(!DEBUG_B_TEST);
2494 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2498 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2501 if (PERLDB_SINGLE && PL_DBsingle)
2504 PERL_SET_PHASE(PERL_PHASE_INIT);
2505 call_list(oldscope, PL_initav);
2507 #ifdef PERL_DEBUG_READONLY_OPS
2508 if (PL_main_root && PL_main_root->op_slabbed)
2509 Slab_to_ro(OpSLAB(PL_main_root));
2515 PERL_SET_PHASE(PERL_PHASE_RUN);
2518 PL_restartjmpenv = NULL;
2519 PL_op = PL_restartop;
2523 else if (PL_main_start) {
2524 CvDEPTH(PL_main_cv) = 1;
2525 PL_op = PL_main_start;
2529 NOT_REACHED; /* NOTREACHED */
2533 =head1 SV Manipulation Functions
2535 =for apidoc p||get_sv
2537 Returns the SV of the specified Perl scalar. C<flags> are passed to
2538 C<gv_fetchpv>. If C<GV_ADD> is set and the
2539 Perl variable does not exist then it will be created. If C<flags> is zero
2540 and the variable does not exist then NULL is returned.
2546 Perl_get_sv(pTHX_ const char *name, I32 flags)
2550 PERL_ARGS_ASSERT_GET_SV;
2552 gv = gv_fetchpv(name, flags, SVt_PV);
2559 =head1 Array Manipulation Functions
2561 =for apidoc p||get_av
2563 Returns the AV of the specified Perl global or package array with the given
2564 name (so it won't work on lexical variables). C<flags> are passed
2565 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2566 Perl variable does not exist then it will be created. If C<flags> is zero
2567 and the variable does not exist then NULL is returned.
2569 Perl equivalent: C<@{"$name"}>.
2575 Perl_get_av(pTHX_ const char *name, I32 flags)
2577 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2579 PERL_ARGS_ASSERT_GET_AV;
2589 =head1 Hash Manipulation Functions
2591 =for apidoc p||get_hv
2593 Returns the HV of the specified Perl hash. C<flags> are passed to
2594 C<gv_fetchpv>. If C<GV_ADD> is set and the
2595 Perl variable does not exist then it will be created. If C<flags> is zero
2596 and the variable does not exist then C<NULL> is returned.
2602 Perl_get_hv(pTHX_ const char *name, I32 flags)
2604 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2606 PERL_ARGS_ASSERT_GET_HV;
2616 =head1 CV Manipulation Functions
2618 =for apidoc p||get_cvn_flags
2620 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2621 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2622 exist then it will be declared (which has the same effect as saying
2623 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2624 then NULL is returned.
2626 =for apidoc p||get_cv
2628 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2634 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2636 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2638 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2640 /* XXX this is probably not what they think they're getting.
2641 * It has the same effect as "sub name;", i.e. just a forward
2643 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2644 return newSTUB(gv,0);
2651 /* Nothing in core calls this now, but we can't replace it with a macro and
2652 move it to mathoms.c as a macro would evaluate name twice. */
2654 Perl_get_cv(pTHX_ const char *name, I32 flags)
2656 PERL_ARGS_ASSERT_GET_CV;
2658 return get_cvn_flags(name, strlen(name), flags);
2661 /* Be sure to refetch the stack pointer after calling these routines. */
2665 =head1 Callback Functions
2667 =for apidoc p||call_argv
2669 Performs a callback to the specified named and package-scoped Perl subroutine
2670 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2673 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2679 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2681 /* See G_* flags in cop.h */
2682 /* null terminated arg list */
2686 PERL_ARGS_ASSERT_CALL_ARGV;
2690 mXPUSHs(newSVpv(*argv,0));
2694 return call_pv(sub_name, flags);
2698 =for apidoc p||call_pv
2700 Performs a callback to the specified Perl sub. See L<perlcall>.
2706 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2707 /* name of the subroutine */
2708 /* See G_* flags in cop.h */
2710 PERL_ARGS_ASSERT_CALL_PV;
2712 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2716 =for apidoc p||call_method
2718 Performs a callback to the specified Perl method. The blessed object must
2719 be on the stack. See L<perlcall>.
2725 Perl_call_method(pTHX_ const char *methname, I32 flags)
2726 /* name of the subroutine */
2727 /* See G_* flags in cop.h */
2731 PERL_ARGS_ASSERT_CALL_METHOD;
2733 len = strlen(methname);
2734 sv = flags & G_METHOD_NAMED
2735 ? sv_2mortal(newSVpvn_share(methname, len,0))
2736 : newSVpvn_flags(methname, len, SVs_TEMP);
2738 return call_sv(sv, flags | G_METHOD);
2741 /* May be called with any of a CV, a GV, or an SV containing the name. */
2743 =for apidoc p||call_sv
2745 Performs a callback to the Perl sub specified by the SV.
2747 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2748 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2749 or C<SvPV(sv)> will be used as the name of the sub to call.
2751 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2752 C<SvPV(sv)> will be used as the name of the method to call.
2754 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2755 the name of the method to call.
2757 Some other values are treated specially for internal use and should
2766 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2767 /* See G_* flags in cop.h */
2770 LOGOP myop; /* fake syntax tree node */
2774 bool oldcatch = CATCH_GET;
2776 OP* const oldop = PL_op;
2779 PERL_ARGS_ASSERT_CALL_SV;
2781 if (flags & G_DISCARD) {
2785 if (!(flags & G_WANT)) {
2786 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2791 Zero(&myop, 1, LOGOP);
2792 if (!(flags & G_NOARGS))
2793 myop.op_flags |= OPf_STACKED;
2794 myop.op_flags |= OP_GIMME_REVERSE(flags);
2798 if (!(flags & G_METHOD_NAMED)) {
2806 if (PERLDB_SUB && PL_curstash != PL_debstash
2807 /* Handle first BEGIN of -d. */
2808 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2809 /* Try harder, since this may have been a sighandler, thus
2810 * curstash may be meaningless. */
2811 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2812 && !(flags & G_NODEBUG))
2813 myop.op_private |= OPpENTERSUB_DB;
2815 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2816 Zero(&method_op, 1, METHOP);
2817 method_op.op_next = (OP*)&myop;
2818 PL_op = (OP*)&method_op;
2819 if ( flags & G_METHOD_NAMED ) {
2820 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2821 method_op.op_type = OP_METHOD_NAMED;
2822 method_op.op_u.op_meth_sv = sv;
2824 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2825 method_op.op_type = OP_METHOD;
2827 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2828 myop.op_type = OP_ENTERSUB;
2831 if (!(flags & G_EVAL)) {
2833 CALL_BODY_SUB((OP*)&myop);
2834 retval = PL_stack_sp - (PL_stack_base + oldmark);
2835 CATCH_SET(oldcatch);
2839 myop.op_other = (OP*)&myop;
2841 old_cxix = cxstack_ix;
2842 create_eval_scope(NULL, flags|G_FAKINGEVAL);
2850 CALL_BODY_SUB((OP*)&myop);
2851 retval = PL_stack_sp - (PL_stack_base + oldmark);
2852 if (!(flags & G_KEEPERR)) {
2860 /* my_exit() was called */
2861 SET_CURSTASH(PL_defstash);
2865 NOT_REACHED; /* NOTREACHED */
2868 PL_restartjmpenv = NULL;
2869 PL_op = PL_restartop;
2873 PL_stack_sp = PL_stack_base + oldmark;
2874 if ((flags & G_WANT) == G_ARRAY)
2878 *++PL_stack_sp = &PL_sv_undef;
2883 /* if we croaked, depending on how we croaked the eval scope
2884 * may or may not have already been popped */
2885 if (cxstack_ix > old_cxix) {
2886 assert(cxstack_ix == old_cxix + 1);
2887 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
2888 delete_eval_scope();
2893 if (flags & G_DISCARD) {
2894 PL_stack_sp = PL_stack_base + oldmark;
2903 /* Eval a string. The G_EVAL flag is always assumed. */
2906 =for apidoc p||eval_sv
2908 Tells Perl to C<eval> the string in the SV. It supports the same flags
2909 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
2915 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2917 /* See G_* flags in cop.h */
2920 UNOP myop; /* fake syntax tree node */
2924 OP* const oldop = PL_op;
2927 PERL_ARGS_ASSERT_EVAL_SV;
2929 if (flags & G_DISCARD) {
2936 Zero(&myop, 1, UNOP);
2939 oldmark = SP - PL_stack_base;
2945 if (!(flags & G_NOARGS))
2946 myop.op_flags = OPf_STACKED;
2947 myop.op_type = OP_ENTEREVAL;
2948 myop.op_flags |= OP_GIMME_REVERSE(flags);
2949 if (flags & G_KEEPERR)
2950 myop.op_flags |= OPf_SPECIAL;
2952 if (flags & G_RE_REPARSING)
2953 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
2955 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2956 * before a cx_pusheval(), which corrupts the stack after a croak */
2957 TAINT_PROPER("eval_sv()");
2963 if (PL_op == (OP*)(&myop)) {
2964 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2966 goto fail; /* failed in compilation */
2969 retval = PL_stack_sp - (PL_stack_base + oldmark);
2970 if (!(flags & G_KEEPERR)) {
2978 /* my_exit() was called */
2979 SET_CURSTASH(PL_defstash);
2983 NOT_REACHED; /* NOTREACHED */
2986 PL_restartjmpenv = NULL;
2987 PL_op = PL_restartop;
2992 PL_stack_sp = PL_stack_base + oldmark;
2993 if ((flags & G_WANT) == G_ARRAY)
2997 *++PL_stack_sp = &PL_sv_undef;
3003 if (flags & G_DISCARD) {
3004 PL_stack_sp = PL_stack_base + oldmark;
3014 =for apidoc p||eval_pv
3016 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3022 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3024 SV* sv = newSVpv(p, 0);
3026 PERL_ARGS_ASSERT_EVAL_PV;
3028 eval_sv(sv, G_SCALAR);
3037 /* just check empty string or undef? */
3038 if (croak_on_error) {
3039 SV * const errsv = ERRSV;
3040 if(SvTRUE_NN(errsv))
3041 /* replace with croak_sv? */
3042 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3048 /* Require a module. */
3051 =head1 Embedding Functions
3053 =for apidoc p||require_pv
3055 Tells Perl to C<require> the file named by the string argument. It is
3056 analogous to the Perl code C<eval "require '$file'">. It's even
3057 implemented that way; consider using load_module instead.
3062 Perl_require_pv(pTHX_ const char *pv)
3067 PERL_ARGS_ASSERT_REQUIRE_PV;
3069 PUSHSTACKi(PERLSI_REQUIRE);
3070 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3071 eval_sv(sv_2mortal(sv), G_DISCARD);
3076 S_usage(pTHX) /* XXX move this out into a module ? */
3078 /* This message really ought to be max 23 lines.
3079 * Removed -h because the user already knows that option. Others? */
3081 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3082 minimum of 509 character string literals. */
3083 static const char * const usage_msg[] = {
3084 " -0[octal] specify record separator (\\0, if no argument)\n"
3085 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3086 " -C[number/list] enables the listed Unicode features\n"
3087 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3088 " -d[:debugger] run program under debugger\n"
3089 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3090 " -e program one line of program (several -e's allowed, omit programfile)\n"
3091 " -E program like -e, but enables all optional features\n"
3092 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3093 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3094 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3095 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3096 " -l[octal] enable line ending processing, specifies line terminator\n"
3097 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3098 " -n assume \"while (<>) { ... }\" loop around program\n"
3099 " -p assume loop like -n but print line also, like sed\n"
3100 " -s enable rudimentary parsing for switches after programfile\n"
3101 " -S look for programfile using PATH environment variable\n",
3102 " -t enable tainting warnings\n"
3103 " -T enable tainting checks\n"
3104 " -u dump core after parsing program\n"
3105 " -U allow unsafe operations\n"
3106 " -v print version, patchlevel and license\n"
3107 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3108 " -w enable many useful warnings\n"
3109 " -W enable all warnings\n"
3110 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3111 " -X disable all warnings\n"
3113 "Run 'perldoc perl' for more help with Perl.\n\n",
3116 const char * const *p = usage_msg;
3117 PerlIO *out = PerlIO_stdout();
3120 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3123 PerlIO_puts(out, *p++);
3127 /* convert a string of -D options (or digits) into an int.
3128 * sets *s to point to the char after the options */
3132 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3134 static const char * const usage_msgd[] = {
3135 " Debugging flag values: (see also -d)\n"
3136 " p Tokenizing and parsing (with v, displays parse stack)\n"
3137 " s Stack snapshots (with v, displays all stacks)\n"
3138 " l Context (loop) stack processing\n"
3139 " t Trace execution\n"
3140 " o Method and overloading resolution\n",
3141 " c String/numeric conversions\n"
3142 " P Print profiling info, source file input state\n"
3143 " m Memory and SV allocation\n"
3144 " f Format processing\n"
3145 " r Regular expression parsing and execution\n"
3146 " x Syntax tree dump\n",
3147 " u Tainting checks\n"
3148 " H Hash dump -- usurps values()\n"
3149 " X Scratchpad allocation\n"
3151 " S Op slab allocation\n"
3153 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3154 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3155 " v Verbose: use in conjunction with other flags\n"
3156 " C Copy On Write\n"
3157 " A Consistency checks on internal structures\n"
3158 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3159 " M trace smart match resolution\n"
3160 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3161 " L trace some locale setting information--for Perl core development\n",
3162 " i trace PerlIO layer processing\n",
3167 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3170 /* if adding extra options, remember to update DEBUG_MASK */
3171 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3173 for (; isWORDCHAR(**s); (*s)++) {
3174 const char * const d = strchr(debopts,**s);
3176 uv |= 1 << (d - debopts);
3177 else if (ckWARN_d(WARN_DEBUGGING))
3178 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3179 "invalid option -D%c, use -D'' to see choices\n", **s);
3182 else if (isDIGIT(**s)) {
3184 if (grok_atoUV(*s, &uv, &e))
3186 for (; isWORDCHAR(**s); (*s)++) ;
3188 else if (givehelp) {
3189 const char *const *p = usage_msgd;
3190 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3192 return (int)uv; /* ignore any UV->int conversion loss */
3196 /* This routine handles any switches that can be given during run */
3199 Perl_moreswitches(pTHX_ const char *s)
3203 const char option = *s; /* used to remember option in -m/-M code */
3205 PERL_ARGS_ASSERT_MORESWITCHES;
3213 SvREFCNT_dec(PL_rs);
3214 if (s[1] == 'x' && s[2]) {
3215 const char *e = s+=2;
3221 flags = PERL_SCAN_SILENT_ILLDIGIT;
3222 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3223 if (s + numlen < e) {
3224 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3228 PL_rs = newSVpvs("");
3229 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3230 uvchr_to_utf8(tmps, rschar);
3231 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3236 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3237 if (rschar & ~((U8)~0))
3238 PL_rs = &PL_sv_undef;
3239 else if (!rschar && numlen >= 2)
3240 PL_rs = newSVpvs("");
3242 char ch = (char)rschar;
3243 PL_rs = newSVpvn(&ch, 1);
3246 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3251 PL_unicode = parse_unicode_opts( (const char **)&s );
3252 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3260 while (*s && !isSPACE(*s)) ++s;
3261 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3273 forbid_setid('d', FALSE);
3276 /* -dt indicates to the debugger that threads will be used */
3277 if (*s == 't' && !isWORDCHAR(s[1])) {
3279 my_setenv("PERL5DB_THREADED", "1");
3282 /* The following permits -d:Mod to accepts arguments following an =
3283 in the fashion that -MSome::Mod does. */
3284 if (*s == ':' || *s == '=') {
3291 sv = newSVpvs("no Devel::");
3293 sv = newSVpvs("use Devel::");
3297 end = s + strlen(s);
3299 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3300 while(isWORDCHAR(*s) || *s==':') ++s;
3302 sv_catpvn(sv, start, end - start);
3304 sv_catpvn(sv, start, s-start);
3305 /* Don't use NUL as q// delimiter here, this string goes in the
3307 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3310 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3314 PL_perldb = PERLDB_ALL;
3321 forbid_setid('D', FALSE);
3323 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3324 #else /* !DEBUGGING */
3325 if (ckWARN_d(WARN_DEBUGGING))
3326 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3327 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3328 for (s++; isWORDCHAR(*s); s++) ;
3331 NOT_REACHED; /* NOTREACHED */
3335 NOT_REACHED; /* NOTREACHED */
3338 Safefree(PL_inplace);
3339 #if defined(__CYGWIN__) /* do backup extension automagically */
3340 if (*(s+1) == '\0') {
3341 PL_inplace = savepvs(".bak");
3344 #endif /* __CYGWIN__ */
3346 const char * const start = ++s;
3347 while (*s && !isSPACE(*s))
3350 PL_inplace = savepvn(start, s - start);
3353 case 'I': /* -I handled both here and in parse_body() */
3354 forbid_setid('I', FALSE);
3356 while (*s && isSPACE(*s))
3361 /* ignore trailing spaces (possibly followed by other switches) */
3363 for (e = p; *e && !isSPACE(*e); e++) ;
3367 } while (*p && *p != '-');
3369 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3375 Perl_croak(aTHX_ "No directory specified for -I");
3381 SvREFCNT_dec(PL_ors_sv);
3387 PL_ors_sv = newSVpvs("\n");
3388 numlen = 3 + (*s == '0');
3389 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3393 if (RsPARA(PL_rs)) {
3394 PL_ors_sv = newSVpvs("\n\n");
3397 PL_ors_sv = newSVsv(PL_rs);
3402 forbid_setid('M', FALSE); /* XXX ? */
3405 forbid_setid('m', FALSE); /* XXX ? */
3410 const char *use = "use ";
3412 /* -M-foo == 'no foo' */
3413 /* Leading space on " no " is deliberate, to make both
3414 possibilities the same length. */
3415 if (*s == '-') { use = " no "; ++s; }
3416 sv = newSVpvn(use,4);
3418 /* We allow -M'Module qw(Foo Bar)' */
3419 while(isWORDCHAR(*s) || *s==':') {
3428 Perl_croak(aTHX_ "Module name required with -%c option",
3431 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3432 "contains single ':'",
3433 (int)(s - start), start, option);
3434 end = s + strlen(s);
3436 sv_catpvn(sv, start, end - start);
3437 if (option == 'm') {
3439 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3440 sv_catpvs( sv, " ()");
3443 sv_catpvn(sv, start, s-start);
3444 /* Use NUL as q''-delimiter. */
3445 sv_catpvs(sv, " split(/,/,q\0");
3447 sv_catpvn(sv, s, end - s);
3448 sv_catpvs(sv, "\0)");
3451 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3454 Perl_croak(aTHX_ "Missing argument to -%c", option);
3465 forbid_setid('s', FALSE);
3466 PL_doswitches = TRUE;
3471 #if defined(SILENT_NO_TAINT_SUPPORT)
3472 /* silently ignore */
3473 #elif defined(NO_TAINT_SUPPORT)
3474 Perl_croak_nocontext("This perl was compiled without taint support. "
3475 "Cowardly refusing to run with -t or -T flags");
3483 PL_do_undump = TRUE;
3493 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3494 PL_dowarn |= G_WARN_ON;
3499 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3500 if (!specialWARN(PL_compiling.cop_warnings))
3501 PerlMemShared_free(PL_compiling.cop_warnings);
3502 PL_compiling.cop_warnings = pWARN_ALL ;
3506 PL_dowarn = G_WARN_ALL_OFF;
3507 if (!specialWARN(PL_compiling.cop_warnings))
3508 PerlMemShared_free(PL_compiling.cop_warnings);
3509 PL_compiling.cop_warnings = pWARN_NONE ;
3516 if (s[0] == '-') /* Additional switches on #! line. */
3521 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3527 #ifdef ALTERNATE_SHEBANG
3528 case 'S': /* OS/2 needs -S on "extproc" line. */
3531 case 'e': case 'f': case 'x': case 'E':
3532 #ifndef ALTERNATE_SHEBANG
3536 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3539 "Unrecognized switch: -%.1s (-h will show valid options)",s
3549 PerlIO * PIO_stdout;
3551 const char * const level_str = "v" PERL_VERSION_STRING;
3552 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3553 #ifdef PERL_PATCHNUM
3555 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3556 static const char num [] = PERL_PATCHNUM "*";
3558 static const char num [] = PERL_PATCHNUM;
3561 const STRLEN num_len = sizeof(num)-1;
3562 /* A very advanced compiler would fold away the strnEQ
3563 and this whole conditional, but most (all?) won't do it.
3564 SV level could also be replaced by with preprocessor
3567 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3568 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3569 of the interp so it might contain format characters
3571 level = newSVpvn(num, num_len);
3573 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3577 SV* level = newSVpvn(level_str, level_len);
3578 #endif /* #ifdef PERL_PATCHNUM */
3579 PIO_stdout = PerlIO_stdout();
3580 PerlIO_printf(PIO_stdout,
3581 "\nThis is perl " STRINGIFY(PERL_REVISION)
3582 ", version " STRINGIFY(PERL_VERSION)
3583 ", subversion " STRINGIFY(PERL_SUBVERSION)
3584 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3586 SvREFCNT_dec_NN(level);
3588 #if defined(LOCAL_PATCH_COUNT)
3589 if (LOCAL_PATCH_COUNT > 0)
3590 PerlIO_printf(PIO_stdout,
3591 "\n(with %d registered patch%s, "
3592 "see perl -V for more detail)",
3594 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3597 PerlIO_printf(PIO_stdout,
3598 "\n\nCopyright 1987-2016, Larry Wall\n");
3600 PerlIO_printf(PIO_stdout,
3601 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3604 PerlIO_printf(PIO_stdout,
3605 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3606 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3609 PerlIO_printf(PIO_stdout,
3610 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3611 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3614 PerlIO_printf(PIO_stdout,
3615 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3618 PerlIO_printf(PIO_stdout,
3619 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3622 PerlIO_printf(PIO_stdout,
3623 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3626 PerlIO_printf(PIO_stdout,
3627 "WINCE port by Rainer Keuchel, 2001-2002\n"
3628 "Built on " __DATE__ " " __TIME__ "\n\n");
3631 #ifdef __SYMBIAN32__
3632 PerlIO_printf(PIO_stdout,
3633 "Symbian port by Nokia, 2004-2005\n");
3635 #ifdef BINARY_BUILD_NOTICE
3636 BINARY_BUILD_NOTICE;
3638 PerlIO_printf(PIO_stdout,
3640 Perl may be copied only under the terms of either the Artistic License or the\n\
3641 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3642 Complete documentation for Perl, including FAQ lists, should be found on\n\
3643 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3644 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3648 /* compliments of Tom Christiansen */
3650 /* unexec() can be found in the Gnu emacs distribution */
3651 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3654 #include <lib$routines.h>
3658 Perl_my_unexec(pTHX)
3661 SV * prog = newSVpv(BIN_EXP, 0);
3662 SV * file = newSVpv(PL_origfilename, 0);
3666 sv_catpvs(prog, "/perl");
3667 sv_catpvs(file, ".perldump");
3669 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3670 /* unexec prints msg to stderr in case of failure */
3671 PerlProc_exit(status);
3673 PERL_UNUSED_CONTEXT;
3675 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3676 # elif defined(WIN32) || defined(__CYGWIN__)
3677 Perl_croak_nocontext("dump is not supported");
3679 ABORT(); /* for use with undump */
3684 /* initialize curinterp */
3689 # define PERLVAR(prefix,var,type)
3690 # define PERLVARA(prefix,var,n,type)
3691 # if defined(PERL_IMPLICIT_CONTEXT)
3692 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3693 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3695 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3696 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3698 # include "intrpvar.h"
3704 # define PERLVAR(prefix,var,type)
3705 # define PERLVARA(prefix,var,n,type)
3706 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3707 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3708 # include "intrpvar.h"
3718 S_init_main_stash(pTHX)
3722 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3723 /* We know that the string "main" will be in the global shared string
3724 table, so it's a small saving to use it rather than allocate another
3726 PL_curstname = newSVpvs_share("main");
3727 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3728 /* If we hadn't caused another reference to "main" to be in the shared
3729 string table above, then it would be worth reordering these two,
3730 because otherwise all we do is delete "main" from it as a consequence
3731 of the SvREFCNT_dec, only to add it again with hv_name_set */
3732 SvREFCNT_dec(GvHV(gv));
3733 hv_name_sets(PL_defstash, "main", 0);
3734 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3736 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3738 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3739 GvMULTI_on(PL_incgv);
3740 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3741 SvREFCNT_inc_simple_void(PL_hintgv);
3742 GvMULTI_on(PL_hintgv);
3743 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3744 SvREFCNT_inc_simple_void(PL_defgv);
3745 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3746 SvREFCNT_inc_simple_void(PL_errgv);
3747 GvMULTI_on(PL_errgv);
3748 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3749 SvREFCNT_inc_simple_void(PL_replgv);
3750 GvMULTI_on(PL_replgv);
3751 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3752 #ifdef PERL_DONT_CREATE_GVSV
3753 (void)gv_SVadd(PL_errgv);
3755 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3757 SET_CURSTASH(PL_defstash);
3758 CopSTASH_set(&PL_compiling, PL_defstash);
3759 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3760 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3762 /* We must init $/ before switches are processed. */
3763 sv_setpvs(get_sv("/", GV_ADD), "\n");
3767 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3770 PerlIO *rsfp = NULL;
3774 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3777 PL_origfilename = savepvs("-e");
3782 /* if find_script() returns, it returns a malloc()-ed value */
3783 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3785 if (strEQs(scriptname, "/dev/fd/")
3786 && isDIGIT(scriptname[8])
3787 && grok_atoUV(scriptname + 8, &uv, &s)
3788 && uv <= PERL_INT_MAX
3793 * Tell apart "normal" usage of fdscript, e.g.
3794 * with bash on FreeBSD:
3795 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3796 * from usage in suidperl.
3797 * Does any "normal" usage leave garbage after the number???
3798 * Is it a mistake to use a similar /dev/fd/ construct for
3803 * Be supersafe and do some sanity-checks.
3804 * Still, can we be sure we got the right thing?
3807 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3810 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3812 scriptname = savepv(s + 1);
3813 Safefree(PL_origfilename);
3814 PL_origfilename = (char *)scriptname;
3819 CopFILE_free(PL_curcop);
3820 CopFILE_set(PL_curcop, PL_origfilename);
3821 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3822 scriptname = (char *)"";
3823 if (fdscript >= 0) {
3824 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3826 else if (!*scriptname) {
3827 forbid_setid(0, *suidscript);
3831 #ifdef FAKE_BIT_BUCKET
3832 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3833 * is called) and still have the "-e" work. (Believe it or not,
3834 * a /dev/null is required for the "-e" to work because source
3835 * filter magic is used to implement it. ) This is *not* a general
3836 * replacement for a /dev/null. What we do here is create a temp
3837 * file (an empty file), open up that as the script, and then
3838 * immediately close and unlink it. Close enough for jazz. */
3839 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3840 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3841 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3842 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3843 FAKE_BIT_BUCKET_TEMPLATE
3845 const char * const err = "Failed to create a fake bit bucket";
3846 if (strEQ(scriptname, BIT_BUCKET)) {
3847 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3848 int old_umask = umask(0177);
3849 int tmpfd = mkstemp(tmpname);
3852 scriptname = tmpname;
3855 Perl_croak(aTHX_ err);
3858 scriptname = mktemp(tmpname);
3860 Perl_croak(aTHX_ err);
3865 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3866 #ifdef FAKE_BIT_BUCKET
3867 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3868 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3869 && strlen(scriptname) == sizeof(tmpname) - 1) {
3872 scriptname = BIT_BUCKET;
3876 /* PSz 16 Sep 03 Keep neat error message */
3878 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
3880 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3881 CopFILE(PL_curcop), Strerror(errno));
3883 fd = PerlIO_fileno(rsfp);
3884 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
3886 /* ensure close-on-exec */
3887 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
3888 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3889 CopFILE(PL_curcop), Strerror(errno));
3895 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
3896 && S_ISDIR(tmpstatbuf.st_mode)))
3897 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3905 * I_SYSSTATVFS HAS_FSTATVFS
3907 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3908 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3909 * here so that metaconfig picks them up. */
3912 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3913 /* Don't even need this function. */
3916 S_validate_suid(pTHX_ PerlIO *rsfp)
3918 const Uid_t my_uid = PerlProc_getuid();
3919 const Uid_t my_euid = PerlProc_geteuid();
3920 const Gid_t my_gid = PerlProc_getgid();
3921 const Gid_t my_egid = PerlProc_getegid();
3923 PERL_ARGS_ASSERT_VALIDATE_SUID;
3925 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3927 int fd = PerlIO_fileno(rsfp);
3929 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
3930 Perl_croak_nocontext( "Illegal suidscript");
3932 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
3934 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
3937 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3938 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3939 /* not set-id, must be wrapped */
3942 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3945 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3950 PERL_ARGS_ASSERT_FIND_BEGINNING;
3952 /* skip forward in input to the real script? */
3955 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3956 Perl_croak(aTHX_ "No Perl script found in input\n");
3958 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3959 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3960 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3962 while (*s == ' ' || *s == '\t') s++;
3964 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3965 || s2[-1] == '_') s2--;
3966 if (strEQs(s2-4,"perl"))
3967 while ((s = moreswitches(s)))
3976 /* no need to do anything here any more if we don't
3978 #ifndef NO_TAINT_SUPPORT
3979 const Uid_t my_uid = PerlProc_getuid();
3980 const Uid_t my_euid = PerlProc_geteuid();
3981 const Gid_t my_gid = PerlProc_getgid();
3982 const Gid_t my_egid = PerlProc_getegid();
3984 PERL_UNUSED_CONTEXT;
3986 /* Should not happen: */
3987 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3988 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
3992 * Should go by suidscript, not uid!=euid: why disallow
3993 * system("ls") in scripts run from setuid things?
3994 * Or, is this run before we check arguments and set suidscript?
3995 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3996 * (We never have suidscript, can we be sure to have fdscript?)
3997 * Or must then go by UID checks? See comments in forbid_setid also.
4001 /* This is used very early in the lifetime of the program,
4002 * before even the options are parsed, so PL_tainting has
4003 * not been initialized properly. */
4005 Perl_doing_taint(int argc, char *argv[], char *envp[])
4007 #ifndef PERL_IMPLICIT_SYS
4008 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4009 * before we have an interpreter-- and the whole point of this
4010 * function is to be called at such an early stage. If you are on
4011 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4012 * "tainted because running with altered effective ids', you'll
4013 * have to add your own checks somewhere in here. The two most
4014 * known samples of 'implicitness' are Win32 and NetWare, neither
4015 * of which has much of concept of 'uids'. */
4016 Uid_t uid = PerlProc_getuid();
4017 Uid_t euid = PerlProc_geteuid();
4018 Gid_t gid = PerlProc_getgid();
4019 Gid_t egid = PerlProc_getegid();
4026 if (uid && (euid != uid || egid != gid))
4028 #endif /* !PERL_IMPLICIT_SYS */
4029 /* This is a really primitive check; environment gets ignored only
4030 * if -T are the first chars together; otherwise one gets
4031 * "Too late" message. */
4032 if ( argc > 1 && argv[1][0] == '-'
4033 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4038 /* Passing the flag as a single char rather than a string is a slight space
4039 optimisation. The only message that isn't /^-.$/ is
4040 "program input from stdin", which is substituted in place of '\0', which
4041 could never be a command line flag. */
4043 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4045 char string[3] = "-x";
4046 const char *message = "program input from stdin";
4048 PERL_UNUSED_CONTEXT;
4054 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4055 if (PerlProc_getuid() != PerlProc_geteuid())
4056 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4057 if (PerlProc_getgid() != PerlProc_getegid())
4058 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4059 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4061 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4065 Perl_init_dbargs(pTHX)
4067 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4072 /* Someone has already created it.
4073 It might have entries, and if we just turn off AvREAL(), they will
4074 "leak" until global destruction. */
4076 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4077 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4079 AvREIFY_only(PL_dbargs);
4083 Perl_init_debugger(pTHX)
4085 HV * const ostash = PL_curstash;
4088 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4090 Perl_init_dbargs(aTHX);
4091 PL_DBgv = MUTABLE_GV(
4092 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4094 PL_DBline = MUTABLE_GV(
4095 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4097 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4098 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4100 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4101 if (!SvIOK(PL_DBsingle))
4102 sv_setiv(PL_DBsingle, 0);
4103 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4104 mg->mg_private = DBVARMG_SINGLE;
4105 SvSETMAGIC(PL_DBsingle);
4107 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4108 if (!SvIOK(PL_DBtrace))
4109 sv_setiv(PL_DBtrace, 0);
4110 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4111 mg->mg_private = DBVARMG_TRACE;
4112 SvSETMAGIC(PL_DBtrace);
4114 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4115 if (!SvIOK(PL_DBsignal))
4116 sv_setiv(PL_DBsignal, 0);
4117 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4118 mg->mg_private = DBVARMG_SIGNAL;
4119 SvSETMAGIC(PL_DBsignal);
4121 SvREFCNT_dec(PL_curstash);
4122 PL_curstash = ostash;
4125 #ifndef STRESS_REALLOC
4126 #define REASONABLE(size) (size)
4127 #define REASONABLE_but_at_least(size,min) (size)
4129 #define REASONABLE(size) (1) /* unreasonable */
4130 #define REASONABLE_but_at_least(size,min) (min)
4134 Perl_init_stacks(pTHX)
4138 /* start with 128-item stack and 8K cxstack */
4139 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4140 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4141 PL_curstackinfo->si_type = PERLSI_MAIN;
4142 PL_curstack = PL_curstackinfo->si_stack;
4143 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4145 PL_stack_base = AvARRAY(PL_curstack);
4146 PL_stack_sp = PL_stack_base;
4147 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4149 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4152 PL_tmps_max = REASONABLE(128);
4154 Newx(PL_markstack,REASONABLE(32),I32);
4155 PL_markstack_ptr = PL_markstack;
4156 PL_markstack_max = PL_markstack + REASONABLE(32);
4160 Newx(PL_scopestack,REASONABLE(32),I32);
4162 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4164 PL_scopestack_ix = 0;
4165 PL_scopestack_max = REASONABLE(32);
4167 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4168 Newx(PL_savestack, size, ANY);
4169 PL_savestack_ix = 0;
4170 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4171 PL_savestack_max = size - SS_MAXPUSH;
4179 while (PL_curstackinfo->si_next)
4180 PL_curstackinfo = PL_curstackinfo->si_next;
4181 while (PL_curstackinfo) {
4182 PERL_SI *p = PL_curstackinfo->si_prev;
4183 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4184 Safefree(PL_curstackinfo->si_cxstack);
4185 Safefree(PL_curstackinfo);
4186 PL_curstackinfo = p;
4188 Safefree(PL_tmps_stack);
4189 Safefree(PL_markstack);
4190 Safefree(PL_scopestack);
4192 Safefree(PL_scopestack_name);
4194 Safefree(PL_savestack);
4198 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4200 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4201 AV *const isa = GvAVn(gv);
4204 PERL_ARGS_ASSERT_POPULATE_ISA;
4206 if(AvFILLp(isa) != -1)
4209 /* NOTE: No support for tied ISA */
4211 va_start(args, len);
4213 const char *const parent = va_arg(args, const char*);
4218 parent_len = va_arg(args, size_t);
4220 /* Arguments are supplied with a trailing :: */
4221 assert(parent_len > 2);
4222 assert(parent[parent_len - 1] == ':');
4223 assert(parent[parent_len - 2] == ':');
4224 av_push(isa, newSVpvn(parent, parent_len - 2));
4225 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4232 S_init_predump_symbols(pTHX)
4237 sv_setpvs(get_sv("\"", GV_ADD), " ");
4238 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4241 /* Historically, PVIOs were blessed into IO::Handle, unless
4242 FileHandle was loaded, in which case they were blessed into
4243 that. Action at a distance.
4244 However, if we simply bless into IO::Handle, we break code
4245 that assumes that PVIOs will have (among others) a seek
4246 method. IO::File inherits from IO::Handle and IO::Seekable,
4247 and provides the needed methods. But if we simply bless into
4248 it, then we break code that assumed that by loading
4249 IO::Handle, *it* would work.
4250 So a compromise is to set up the correct @IO::File::ISA,
4251 so that code that does C<use IO::Handle>; will still work.
4254 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4255 STR_WITH_LEN("IO::Handle::"),
4256 STR_WITH_LEN("IO::Seekable::"),
4257 STR_WITH_LEN("Exporter::"),
4260 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4261 GvMULTI_on(PL_stdingv);
4262 io = GvIOp(PL_stdingv);
4263 IoTYPE(io) = IoTYPE_RDONLY;
4264 IoIFP(io) = PerlIO_stdin();
4265 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4267 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4269 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4272 IoTYPE(io) = IoTYPE_WRONLY;
4273 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4275 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4277 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4279 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4280 GvMULTI_on(PL_stderrgv);
4281 io = GvIOp(PL_stderrgv);
4282 IoTYPE(io) = IoTYPE_WRONLY;
4283 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4284 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4286 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4288 PL_statname = newSVpvs(""); /* last filename we did stat on */
4292 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4294 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4296 argc--,argv++; /* skip name of script */
4297 if (PL_doswitches) {
4298 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4302 if (argv[0][1] == '-' && !argv[0][2]) {
4306 if ((s = strchr(argv[0], '='))) {
4307 const char *const start_name = argv[0] + 1;
4308 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4309 TRUE, SVt_PV)), s + 1);
4312 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4315 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4316 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4317 GvMULTI_on(PL_argvgv);
4318 av_clear(GvAVn(PL_argvgv));
4319 for (; argc > 0; argc--,argv++) {
4320 SV * const sv = newSVpv(argv[0],0);
4321 av_push(GvAV(PL_argvgv),sv);
4322 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4323 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4326 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4327 (void)sv_utf8_decode(sv);
4331 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4332 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4333 "-i used with no filenames on the command line, "
4334 "reading from STDIN");
4338 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4345 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4347 PL_toptarget = newSV_type(SVt_PVIV);
4348 SvPVCLEAR(PL_toptarget);
4349 PL_bodytarget = newSV_type(SVt_PVIV);
4350 SvPVCLEAR(PL_bodytarget);
4351 PL_formtarget = PL_bodytarget;
4355 init_argv_symbols(argc,argv);
4357 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4358 sv_setpv(GvSV(tmpgv),PL_origfilename);
4360 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4362 bool env_is_not_environ;
4363 SvREFCNT_inc_simple_void_NN(PL_envgv);
4364 GvMULTI_on(PL_envgv);
4365 hv = GvHVn(PL_envgv);
4366 hv_magic(hv, NULL, PERL_MAGIC_env);
4368 #ifdef USE_ENVIRON_ARRAY
4369 /* Note that if the supplied env parameter is actually a copy
4370 of the global environ then it may now point to free'd memory
4371 if the environment has been modified since. To avoid this
4372 problem we treat env==NULL as meaning 'use the default'
4376 env_is_not_environ = env != environ;
4377 if (env_is_not_environ
4378 # ifdef USE_ITHREADS
4379 && PL_curinterp == aTHX
4391 for (; *env; env++) {
4394 if (!(s = strchr(old_var,'=')) || s == old_var)
4398 #if defined(MSDOS) && !defined(DJGPP)
4400 (void)strupr(old_var);
4403 if (hv_exists(hv, old_var, nlen)) {
4404 const char *name = savepvn(old_var, nlen);
4406 /* make sure we use the same value as getenv(), otherwise code that
4407 uses getenv() (like setlocale()) might see a different value to %ENV
4409 sv = newSVpv(PerlEnv_getenv(name), 0);
4411 /* keep a count of the dups of this name so we can de-dup environ later */
4412 if (hv_exists(dups, name, nlen))
4413 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4415 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4420 sv = newSVpv(s+1, 0);
4422 (void)hv_store(hv, old_var, nlen, sv, 0);
4423 if (env_is_not_environ)
4427 /* environ has some duplicate definitions, remove them */
4430 while ((entry = hv_iternext_flags(dups, 0))) {
4432 const char *name = HePV(entry, nlen);
4433 IV count = SvIV(HeVAL(entry));
4435 SV **valp = hv_fetch(hv, name, nlen, 0);
4439 /* try to remove any duplicate names, depending on the
4440 * implementation used in my_setenv() the iteration might
4441 * not be necessary, but let's be safe.
4443 for (i = 0; i < count; ++i)
4446 /* and set it back to the value we set $ENV{name} to */
4447 my_setenv(name, SvPV_nolen(*valp));
4450 SvREFCNT_dec_NN(dups);
4452 #endif /* USE_ENVIRON_ARRAY */
4453 #endif /* !PERL_MICRO */
4457 /* touch @F array to prevent spurious warnings 20020415 MJD */
4459 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4464 S_init_perllib(pTHX)
4467 const char *perl5lib = NULL;
4470 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4474 if (!TAINTING_get) {
4476 perl5lib = PerlEnv_getenv("PERL5LIB");
4478 * It isn't possible to delete an environment variable with
4479 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4480 * case we treat PERL5LIB as undefined if it has a zero-length value.
4482 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4483 if (perl5lib && *perl5lib != '\0')
4487 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4489 s = PerlEnv_getenv("PERLLIB");
4491 incpush_use_sep(s, 0, 0);
4494 /* Treat PERL5?LIB as a possible search list logical name -- the
4495 * "natural" VMS idiom for a Unix path string. We allow each
4496 * element to be a set of |-separated directories for compatibility.
4500 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4502 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4503 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4505 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4506 incpush_use_sep(buf, 0, 0);
4511 #ifndef PERL_IS_MINIPERL
4512 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4513 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4515 /* Use the ~-expanded versions of APPLLIB (undocumented),
4516 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4519 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4520 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4524 /* sitearch is always relative to sitelib on Windows for
4525 * DLL-based path intuition to work correctly */
4526 # if !defined(WIN32)
4527 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4528 INCPUSH_CAN_RELOCATE);
4534 /* this picks up sitearch as well */
4535 s = PerlEnv_sitelib_path(PERL_FS_VERSION, &len);
4537 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4539 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4543 #ifdef PERL_VENDORARCH_EXP
4544 /* vendorarch is always relative to vendorlib on Windows for
4545 * DLL-based path intuition to work correctly */
4546 # if !defined(WIN32)
4547 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4548 INCPUSH_CAN_RELOCATE);
4552 #ifdef PERL_VENDORLIB_EXP
4554 /* this picks up vendorarch as well */
4555 s = PerlEnv_vendorlib_path(PERL_FS_VERSION, &len);
4557 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4559 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4560 INCPUSH_CAN_RELOCATE);
4565 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4569 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4573 s = PerlEnv_lib_path(PERL_FS_VERSION, &len);
4575 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4578 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4580 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4584 #ifdef PERL_OTHERLIBDIRS
4585 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4586 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4587 |INCPUSH_CAN_RELOCATE);
4590 if (!TAINTING_get) {
4593 * It isn't possible to delete an environment variable with
4594 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4595 * case we treat PERL5LIB as undefined if it has a zero-length value.
4597 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4598 if (perl5lib && *perl5lib != '\0')
4602 incpush_use_sep(perl5lib, 0,
4603 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4605 /* Treat PERL5?LIB as a possible search list logical name -- the
4606 * "natural" VMS idiom for a Unix path string. We allow each
4607 * element to be a set of |-separated directories for compatibility.
4611 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4613 incpush_use_sep(buf, 0,
4614 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4615 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4619 /* Use the ~-expanded versions of APPLLIB (undocumented),
4620 SITELIB and VENDORLIB for older versions
4623 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4624 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4627 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4628 /* Search for version-specific dirs below here */
4629 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4630 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4634 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4635 /* Search for version-specific dirs below here */
4636 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4637 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4640 #ifdef PERL_OTHERLIBDIRS
4641 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4642 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4643 |INCPUSH_CAN_RELOCATE);
4645 #endif /* !PERL_IS_MINIPERL */
4647 if (!TAINTING_get) {
4648 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4649 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4650 if (unsafe && strEQ(unsafe, "1"))
4652 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4656 #if defined(DOSISH) || defined(__SYMBIAN32__)
4657 # define PERLLIB_SEP ';'
4660 # define PERLLIB_SEP PL_perllib_sep
4662 # define PERLLIB_SEP ':'
4665 #ifndef PERLLIB_MANGLE
4666 # define PERLLIB_MANGLE(s,n) (s)
4669 #ifndef PERL_IS_MINIPERL
4670 /* Push a directory onto @INC if it exists.
4671 Generate a new SV if we do this, to save needing to copy the SV we push
4674 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4678 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4680 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4681 S_ISDIR(tmpstatbuf.st_mode)) {
4683 dir = newSVsv(stem);
4685 /* Truncate dir back to stem. */
4686 SvCUR_set(dir, SvCUR(stem));
4693 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4695 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4698 PERL_ARGS_ASSERT_MAYBERELOCATE;
4701 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4702 defined to so something (in os2/os2.c), but the code has been
4703 this way, ignoring any possible changed of length, since
4704 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4706 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4712 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4714 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4715 sv_usepvn(libdir,unix,len);
4718 PerlIO_printf(Perl_error_log,
4719 "Failed to unixify @INC element \"%s\"\n",
4720 SvPV_nolen_const(libdir));
4724 /* Do the if() outside the #ifdef to avoid warnings about an unused
4727 #ifdef PERL_RELOCATABLE_INC
4729 * Relocatable include entries are marked with a leading .../
4732 * 0: Remove that leading ".../"
4733 * 1: Remove trailing executable name (anything after the last '/')
4734 * from the perl path to give a perl prefix
4736 * While the @INC element starts "../" and the prefix ends with a real
4737 * directory (ie not . or ..) chop that real directory off the prefix
4738 * and the leading "../" from the @INC element. ie a logical "../"
4740 * Finally concatenate the prefix and the remainder of the @INC element
4741 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4742 * generates /usr/local/lib/perl5
4744 const char *libpath = SvPVX(libdir);
4745 STRLEN libpath_len = SvCUR(libdir);
4746 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4748 SV * const caret_X = get_sv("\030", 0);
4749 /* Going to use the SV just as a scratch buffer holding a C
4755 /* $^X is *the* source of taint if tainting is on, hence
4756 SvPOK() won't be true. */
4758 assert(SvPOKp(caret_X));
4759 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4761 /* Firstly take off the leading .../
4762 If all else fail we'll do the paths relative to the current
4764 sv_chop(libdir, libpath + 4);
4765 /* Don't use SvPV as we're intentionally bypassing taining,
4766 mortal copies that the mg_get of tainting creates, and
4767 corruption that seems to come via the save stack.
4768 I guess that the save stack isn't correctly set up yet. */
4769 libpath = SvPVX(libdir);
4770 libpath_len = SvCUR(libdir);
4772 /* This would work more efficiently with memrchr, but as it's
4773 only a GNU extension we'd need to probe for it and
4774 implement our own. Not hard, but maybe not worth it? */
4776 prefix = SvPVX(prefix_sv);
4777 lastslash = strrchr(prefix, '/');
4779 /* First time in with the *lastslash = '\0' we just wipe off
4780 the trailing /perl from (say) /usr/foo/bin/perl
4784 while ((*lastslash = '\0'), /* Do that, come what may. */
4785 (libpath_len >= 3 && _memEQs(libpath, "../")
4786 && (lastslash = strrchr(prefix, '/')))) {
4787 if (lastslash[1] == '\0'
4788 || (lastslash[1] == '.'
4789 && (lastslash[2] == '/' /* ends "/." */
4790 || (lastslash[2] == '/'
4791 && lastslash[3] == '/' /* or "/.." */
4793 /* Prefix ends "/" or "/." or "/..", any of which
4794 are fishy, so don't do any more logical cleanup.
4798 /* Remove leading "../" from path */
4801 /* Next iteration round the loop removes the last
4802 directory name from prefix by writing a '\0' in
4803 the while clause. */
4805 /* prefix has been terminated with a '\0' to the correct
4806 length. libpath points somewhere into the libdir SV.
4807 We need to join the 2 with '/' and drop the result into
4809 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4810 SvREFCNT_dec(libdir);
4811 /* And this is the new libdir. */
4814 (PerlProc_getuid() != PerlProc_geteuid() ||
4815 PerlProc_getgid() != PerlProc_getegid())) {
4816 /* Need to taint relocated paths if running set ID */
4817 SvTAINTED_on(libdir);
4820 SvREFCNT_dec(prefix_sv);
4828 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4830 #ifndef PERL_IS_MINIPERL
4831 const U8 using_sub_dirs
4832 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4833 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4834 const U8 add_versioned_sub_dirs
4835 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4836 const U8 add_archonly_sub_dirs
4837 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4838 #ifdef PERL_INC_VERSION_LIST
4839 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4842 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4843 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4844 AV *const inc = GvAVn(PL_incgv);
4846 PERL_ARGS_ASSERT_INCPUSH;
4849 /* Could remove this vestigial extra block, if we don't mind a lot of
4850 re-indenting diff noise. */
4852 SV *const libdir = mayberelocate(dir, len, flags);
4853 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4854 arranged to unshift #! line -I onto the front of @INC. However,
4855 -I can add version and architecture specific libraries, and they
4856 need to go first. The old code assumed that it was always
4857 pushing. Hence to make it work, need to push the architecture
4858 (etc) libraries onto a temporary array, then "unshift" that onto
4859 the front of @INC. */
4860 #ifndef PERL_IS_MINIPERL
4861 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4864 * BEFORE pushing libdir onto @INC we may first push version- and
4865 * archname-specific sub-directories.
4867 if (using_sub_dirs) {
4868 SV *subdir = newSVsv(libdir);
4869 #ifdef PERL_INC_VERSION_LIST
4870 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4871 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4872 const char * const *incver;
4875 if (add_versioned_sub_dirs) {
4876 /* .../version/archname if -d .../version/archname */
4877 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4878 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4880 /* .../version if -d .../version */
4881 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4882 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4885 #ifdef PERL_INC_VERSION_LIST
4887 for (incver = incverlist; *incver; incver++) {
4888 /* .../xxx if -d .../xxx */
4889 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4890 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4895 if (add_archonly_sub_dirs) {
4896 /* .../archname if -d .../archname */
4897 sv_catpvs(subdir, "/" ARCHNAME);
4898 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4902 assert (SvREFCNT(subdir) == 1);
4903 SvREFCNT_dec(subdir);
4905 #endif /* !PERL_IS_MINIPERL */
4906 /* finally add this lib directory at the end of @INC */
4908 #ifdef PERL_IS_MINIPERL
4909 const Size_t extra = 0;
4911 Size_t extra = av_tindex(av) + 1;
4913 av_unshift(inc, extra + push_basedir);
4915 av_store(inc, extra, libdir);
4916 #ifndef PERL_IS_MINIPERL
4918 /* av owns a reference, av_store() expects to be donated a
4919 reference, and av expects to be sane when it's cleared.
4920 If I wanted to be naughty and wrong, I could peek inside the
4921 implementation of av_clear(), realise that it uses
4922 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4923 and so directly steal from it (with a memcpy() to inc, and
4924 then memset() to NULL them out. But people copy code from the
4925 core expecting it to be best practise, so let's use the API.
4926 Although studious readers will note that I'm not checking any
4928 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4933 else if (push_basedir) {
4934 av_push(inc, libdir);
4937 if (!push_basedir) {
4938 assert (SvREFCNT(libdir) == 1);
4939 SvREFCNT_dec(libdir);
4945 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4949 /* This logic has been broken out from S_incpush(). It may be possible to
4952 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4954 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4955 * argument to incpush_use_sep. This allows creation of relocatable
4956 * Perl distributions that patch the binary at install time. Those
4957 * distributions will have to provide their own relocation tools; this
4958 * is not a feature otherwise supported by core Perl.
4960 #ifndef PERL_RELOCATABLE_INCPUSH
4967 /* Break at all separators */
4968 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4970 /* skip any consecutive separators */
4972 /* Uncomment the next line for PATH semantics */
4973 /* But you'll need to write tests */
4974 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4976 incpush(p, (STRLEN)(s - p), flags);
4981 incpush(p, (STRLEN)(end - p), flags);
4986 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4989 VOL const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4995 PERL_ARGS_ASSERT_CALL_LIST;
4997 while (av_tindex(paramList) >= 0) {
4998 cv = MUTABLE_CV(av_shift(paramList));
5000 if (paramList == PL_beginav) {
5001 /* save PL_beginav for compiler */
5002 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5004 else if (paramList == PL_checkav) {
5005 /* save PL_checkav for compiler */
5006 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5008 else if (paramList == PL_unitcheckav) {
5009 /* save PL_unitcheckav for compiler */
5010 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5020 (void)SvPV_const(atsv, len);
5022 PL_curcop = &PL_compiling;
5023 CopLINE_set(PL_curcop, oldline);
5024 if (paramList == PL_beginav)
5025 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5027 Perl_sv_catpvf(aTHX_ atsv,
5028 "%s failed--call queue aborted",
5029 paramList == PL_checkav ? "CHECK"
5030 : paramList == PL_initav ? "INIT"
5031 : paramList == PL_unitcheckav ? "UNITCHECK"
5033 while (PL_scopestack_ix > oldscope)
5036 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5043 /* my_exit() was called */
5044 while (PL_scopestack_ix > oldscope)
5047 SET_CURSTASH(PL_defstash);
5048 PL_curcop = &PL_compiling;
5049 CopLINE_set(PL_curcop, oldline);
5052 NOT_REACHED; /* NOTREACHED */
5055 PL_curcop = &PL_compiling;
5056 CopLINE_set(PL_curcop, oldline);
5059 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5068 Perl_my_exit(pTHX_ U32 status)
5070 if (PL_exit_flags & PERL_EXIT_ABORT) {
5073 if (PL_exit_flags & PERL_EXIT_WARN) {
5074 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5075 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5076 PL_exit_flags &= ~PERL_EXIT_ABORT;
5086 STATUS_EXIT_SET(status);
5093 Perl_my_failure_exit(pTHX)
5096 /* We have been called to fall on our sword. The desired exit code
5097 * should be already set in STATUS_UNIX, but could be shifted over
5098 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5101 * If an error code has not been set, then force the issue.
5103 if (MY_POSIX_EXIT) {
5105 /* According to the die_exit.t tests, if errno is non-zero */
5106 /* It should be used for the error status. */
5108 if (errno == EVMSERR) {
5109 STATUS_NATIVE = vaxc$errno;
5112 /* According to die_exit.t tests, if the child_exit code is */
5113 /* also zero, then we need to exit with a code of 255 */
5114 if ((errno != 0) && (errno < 256))
5115 STATUS_UNIX_EXIT_SET(errno);
5116 else if (STATUS_UNIX < 255) {
5117 STATUS_UNIX_EXIT_SET(255);
5122 /* The exit code could have been set by $? or vmsish which
5123 * means that it may not have fatal set. So convert
5124 * success/warning codes to fatal with out changing
5125 * the POSIX status code. The severity makes VMS native
5126 * status handling work, while UNIX mode programs use the
5127 * the POSIX exit codes.
5129 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5130 STATUS_NATIVE &= STS$M_COND_ID;
5131 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5135 /* Traditionally Perl on VMS always expects a Fatal Error. */
5136 if (vaxc$errno & 1) {
5138 /* So force success status to failure */
5139 if (STATUS_NATIVE & 1)
5144 STATUS_UNIX = EINTR; /* In case something cares */
5149 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5151 /* Encode the severity code */
5152 severity = STATUS_NATIVE & STS$M_SEVERITY;
5153 STATUS_UNIX = (severity ? severity : 1) << 8;
5155 /* Perl expects this to be a fatal error */
5156 if (severity != STS$K_SEVERE)
5165 STATUS_UNIX_SET(errno);
5167 exitstatus = STATUS_UNIX >> 8;
5168 if (exitstatus & 255)
5169 STATUS_UNIX_SET(exitstatus);
5171 STATUS_UNIX_SET(255);
5174 if (PL_exit_flags & PERL_EXIT_ABORT) {
5177 if (PL_exit_flags & PERL_EXIT_WARN) {
5178 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5179 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5180 PL_exit_flags &= ~PERL_EXIT_ABORT;
5186 S_my_exit_jump(pTHX)
5189 SvREFCNT_dec(PL_e_script);
5193 POPSTACK_TO(PL_mainstack);
5194 if (cxstack_ix >= 0) {
5196 cx_popblock(cxstack);
5204 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5206 const char * const p = SvPVX_const(PL_e_script);
5207 const char *nl = strchr(p, '\n');
5209 PERL_UNUSED_ARG(idx);
5210 PERL_UNUSED_ARG(maxlen);
5212 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5214 filter_del(read_e_script);
5217 sv_catpvn(buf_sv, p, nl-p);
5218 sv_chop(PL_e_script, nl);
5222 /* removes boilerplate code at the end of each boot_Module xsub */
5224 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5227 call_list(PL_scopestack_ix, PL_unitcheckav);
5232 * ex: set ts=8 sts=4 sw=4 et: