4 * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
5 * 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
6 * 2013, 2014, 2015, 2016, 2017 by Larry Wall and others
8 * You may distribute under the terms of either the GNU General Public
9 * License or the Artistic License, as specified in the README file.
14 * A ship then new they built for him
15 * of mithril and of elven-glass
16 * --from Bilbo's song of EƤrendil
18 * [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
21 /* This file contains the top-level functions that are used to create, use
22 * and destroy a perl interpreter, plus the functions used by XS code to
23 * call back into perl. Note that it does not contain the actual main()
24 * function of the interpreter; that can be found in perlmain.c
26 * Note that at build time this file is also linked to as perlmini.c,
27 * and perlmini.o is then built with PERL_IS_MINIPERL defined, which is
28 * then used to create the miniperl executable, rather than perl.o.
31 #if defined(PERL_IS_MINIPERL) && !defined(USE_SITECUSTOMIZE)
32 # define USE_SITECUSTOMIZE
36 #define PERL_IN_PERL_C
38 #include "patchlevel.h" /* for local_patches */
45 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
52 char control[CMSG_SPACE(sizeof(int))];
65 #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 PL_Assigned_invlist = _new_invlist_C_array(Assigned_invlist);
424 #ifdef USE_THREAD_SAFE_LOCALE
425 PL_C_locale_obj = newlocale(LC_ALL_MASK, "C", NULL);
432 =for apidoc nothreadhook
434 Stub that provides thread hook for perl_destruct when there are
441 Perl_nothreadhook(pTHX)
447 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
449 Perl_dump_sv_child(pTHX_ SV *sv)
452 const int sock = PL_dumper_fd;
453 const int debug_fd = PerlIO_fileno(Perl_debug_log);
454 union control_un control;
457 struct cmsghdr *cmptr;
459 unsigned char buffer[256];
461 PERL_ARGS_ASSERT_DUMP_SV_CHILD;
463 if(sock == -1 || debug_fd == -1)
466 PerlIO_flush(Perl_debug_log);
468 /* All these shenanigans are to pass a file descriptor over to our child for
469 it to dump out to. We can't let it hold open the file descriptor when it
470 forks, as the file descriptor it will dump to can turn out to be one end
471 of pipe that some other process will wait on for EOF. (So as it would
472 be open, the wait would be forever.) */
474 msg.msg_control = control.control;
475 msg.msg_controllen = sizeof(control.control);
476 /* We're a connected socket so we don't need a destination */
482 cmptr = CMSG_FIRSTHDR(&msg);
483 cmptr->cmsg_len = CMSG_LEN(sizeof(int));
484 cmptr->cmsg_level = SOL_SOCKET;
485 cmptr->cmsg_type = SCM_RIGHTS;
486 *((int *)CMSG_DATA(cmptr)) = 1;
488 vec[0].iov_base = (void*)&sv;
489 vec[0].iov_len = sizeof(sv);
490 got = sendmsg(sock, &msg, 0);
493 perror("Debug leaking scalars parent sendmsg failed");
496 if(got < sizeof(sv)) {
497 perror("Debug leaking scalars parent short sendmsg");
501 /* Return protocol is
503 unsigned char: length of location string (0 for empty)
504 unsigned char*: string (not terminated)
506 vec[0].iov_base = (void*)&returned_errno;
507 vec[0].iov_len = sizeof(returned_errno);
508 vec[1].iov_base = buffer;
511 got = readv(sock, vec, 2);
514 perror("Debug leaking scalars parent read failed");
515 PerlIO_flush(PerlIO_stderr());
518 if(got < sizeof(returned_errno) + 1) {
519 perror("Debug leaking scalars parent short read");
520 PerlIO_flush(PerlIO_stderr());
525 got = read(sock, buffer + 1, *buffer);
527 perror("Debug leaking scalars parent read 2 failed");
528 PerlIO_flush(PerlIO_stderr());
533 perror("Debug leaking scalars parent short read 2");
534 PerlIO_flush(PerlIO_stderr());
539 if (returned_errno || *buffer) {
540 Perl_warn(aTHX_ "Debug leaking scalars child failed%s%.*s with errno"
541 " %d: %s", (*buffer ? " at " : ""), (int) *buffer, buffer + 1,
542 returned_errno, Strerror(returned_errno));
548 =for apidoc perl_destruct
550 Shuts down a Perl interpreter. See L<perlembed>.
559 VOL signed char destruct_level; /* see possible values in intrpvar.h */
561 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
566 PERL_ARGS_ASSERT_PERL_DESTRUCT;
568 PERL_UNUSED_ARG(my_perl);
571 assert(PL_scopestack_ix == 1);
573 /* wait for all pseudo-forked children to finish */
574 PERL_WAIT_FOR_CHILDREN;
576 destruct_level = PL_perl_destruct_level;
577 #if defined(DEBUGGING) || defined(PERL_TRACK_MEMPOOL)
579 const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
582 if (strEQ(s, "-1")) { /* Special case: modperl folklore. */
586 if (grok_atoUV(s, &uv, NULL) && uv <= INT_MAX)
592 if (destruct_level < i) destruct_level = i;
594 #ifdef PERL_TRACK_MEMPOOL
595 /* RT #114496, for perl_free */
596 PL_perl_destruct_level = i;
602 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
608 if (PL_endav && !PL_minus_c) {
609 PERL_SET_PHASE(PERL_PHASE_END);
610 call_list(PL_scopestack_ix, PL_endav);
616 assert(PL_scopestack_ix == 0);
618 /* Need to flush since END blocks can produce output */
619 /* flush stdout separately, since we can identify it */
622 PerlIO *stdo = PerlIO_stdout();
623 if (*stdo && PerlIO_flush(stdo)) {
624 PerlIO_restore_errno(stdo);
626 PerlIO_printf(PerlIO_stderr(), "Unable to flush stdout: %s",
635 #ifdef PERL_TRACE_OPS
636 /* dump OP-counts if $ENV{PERL_TRACE_OPS} > 0 */
638 const char * const ptoenv = PerlEnv_getenv("PERL_TRACE_OPS");
641 if (!ptoenv || !Perl_grok_atoUV(ptoenv, &uv, NULL)
645 PerlIO_printf(Perl_debug_log, "Trace of all OPs executed:\n");
646 for (i = 0; i <= OP_max; ++i) {
647 if (PL_op_exec_cnt[i])
648 PerlIO_printf(Perl_debug_log, " %s: %" UVuf "\n", PL_op_name[i], PL_op_exec_cnt[i]);
650 /* Utility slot for easily doing little tracing experiments in the runloop: */
651 if (PL_op_exec_cnt[OP_max+1] != 0)
652 PerlIO_printf(Perl_debug_log, " SPECIAL: %" UVuf "\n", PL_op_exec_cnt[OP_max+1]);
653 PerlIO_printf(Perl_debug_log, "\n");
658 if (PL_threadhook(aTHX)) {
659 /* Threads hook has vetoed further cleanup */
660 PL_veto_cleanup = TRUE;
664 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
665 if (destruct_level != 0) {
666 /* Fork here to create a child. Our child's job is to preserve the
667 state of scalars prior to destruction, so that we can instruct it
668 to dump any scalars that we later find have leaked.
669 There's no subtlety in this code - it assumes POSIX, and it doesn't
673 if(socketpair(AF_UNIX, SOCK_STREAM, 0, fd)) {
674 perror("Debug leaking scalars socketpair failed");
680 perror("Debug leaking scalars fork failed");
684 /* We are the child */
685 const int sock = fd[1];
686 const int debug_fd = PerlIO_fileno(Perl_debug_log);
689 /* Our success message is an integer 0, and a char 0 */
690 static const char success[sizeof(int) + 1] = {0};
694 /* We need to close all other file descriptors otherwise we end up
695 with interesting hangs, where the parent closes its end of a
696 pipe, and sits waiting for (another) child to terminate. Only
697 that child never terminates, because it never gets EOF, because
698 we also have the far end of the pipe open. We even need to
699 close the debugging fd, because sometimes it happens to be one
700 end of a pipe, and a process is waiting on the other end for
701 EOF. Normally it would be closed at some point earlier in
702 destruction, but if we happen to cause the pipe to remain open,
703 EOF never occurs, and we get an infinite hang. Hence all the
704 games to pass in a file descriptor if it's actually needed. */
706 f = sysconf(_SC_OPEN_MAX);
708 where = "sysconf failed";
719 union control_un control;
722 struct cmsghdr *cmptr;
726 msg.msg_control = control.control;
727 msg.msg_controllen = sizeof(control.control);
728 /* We're a connected socket so we don't need a source */
732 msg.msg_iovlen = C_ARRAY_LENGTH(vec);
734 vec[0].iov_base = (void*)⌖
735 vec[0].iov_len = sizeof(target);
737 got = recvmsg(sock, &msg, 0);
742 where = "recv failed";
745 if(got < sizeof(target)) {
746 where = "short recv";
750 if(!(cmptr = CMSG_FIRSTHDR(&msg))) {
754 if(cmptr->cmsg_len != CMSG_LEN(sizeof(int))) {
755 where = "wrong cmsg_len";
758 if(cmptr->cmsg_level != SOL_SOCKET) {
759 where = "wrong cmsg_level";
762 if(cmptr->cmsg_type != SCM_RIGHTS) {
763 where = "wrong cmsg_type";
767 got_fd = *(int*)CMSG_DATA(cmptr);
768 /* For our last little bit of trickery, put the file descriptor
769 back into Perl_debug_log, as if we never actually closed it
771 if(got_fd != debug_fd) {
772 if (dup2(got_fd, debug_fd) == -1) {
779 PerlIO_flush(Perl_debug_log);
781 got = write(sock, &success, sizeof(success));
784 where = "write failed";
787 if(got < sizeof(success)) {
788 where = "short write";
795 int send_errno = errno;
796 unsigned char length = (unsigned char) strlen(where);
797 struct iovec failure[3] = {
798 {(void*)&send_errno, sizeof(send_errno)},
800 {(void*)where, length}
802 int got = writev(sock, failure, 3);
803 /* Bad news travels fast. Faster than data. We'll get a SIGPIPE
804 in the parent if we try to read from the socketpair after the
805 child has exited, even if there was data to read.
806 So sleep a bit to give the parent a fighting chance of
809 _exit((got == -1) ? errno : 0);
813 PL_dumper_fd = fd[0];
818 /* We must account for everything. */
820 /* Destroy the main CV and syntax tree */
821 /* Set PL_curcop now, because destroying ops can cause new SVs
822 to be generated in Perl_pad_swipe, and when running with
823 -DDEBUG_LEAKING_SCALARS they expect PL_curcop to point to a valid
824 op from which the filename structure member is copied. */
825 PL_curcop = &PL_compiling;
827 /* ensure comppad/curpad to refer to main's pad */
828 if (CvPADLIST(PL_main_cv)) {
829 PAD_SET_CUR_NOSAVE(CvPADLIST(PL_main_cv), 1);
830 PL_comppad_name = PadlistNAMES(CvPADLIST(PL_main_cv));
832 op_free(PL_main_root);
835 PL_main_start = NULL;
836 /* note that PL_main_cv isn't usually actually freed at this point,
837 * due to the CvOUTSIDE refs from subs compiled within it. It will
838 * get freed once all the subs are freed in sv_clean_all(), for
839 * destruct_level > 0 */
840 SvREFCNT_dec(PL_main_cv);
842 PERL_SET_PHASE(PERL_PHASE_DESTRUCT);
844 /* Tell PerlIO we are about to tear things apart in case
845 we have layers which are using resources that should
849 PerlIO_destruct(aTHX);
852 * Try to destruct global references. We do this first so that the
853 * destructors and destructees still exist. Some sv's might remain.
854 * Non-referenced objects are on their own.
858 /* unhook hooks which will soon be, or use, destroyed data */
859 SvREFCNT_dec(PL_warnhook);
861 SvREFCNT_dec(PL_diehook);
864 /* call exit list functions */
865 while (PL_exitlistlen-- > 0)
866 PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
868 Safefree(PL_exitlist);
873 SvREFCNT_dec(PL_registered_mros);
875 /* jettison our possibly duplicated environment */
876 /* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
877 * so we certainly shouldn't free it here
880 #if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
881 if (environ != PL_origenviron && !PL_use_safe_putenv
883 /* only main thread can free environ[0] contents */
884 && PL_curinterp == aTHX
890 for (i = 0; environ[i]; i++)
891 safesysfree(environ[i]);
893 /* Must use safesysfree() when working with environ. */
894 safesysfree(environ);
896 environ = PL_origenviron;
899 #endif /* !PERL_MICRO */
901 if (destruct_level == 0) {
903 DEBUG_P(debprofdump());
905 #if defined(PERLIO_LAYERS)
906 /* No more IO - including error messages ! */
907 PerlIO_cleanup(aTHX);
910 CopFILE_free(&PL_compiling);
912 /* The exit() function will do everything that needs doing. */
916 /* Below, do clean up for when PERL_DESTRUCT_LEVEL is not 0 */
919 /* the syntax tree is shared between clones
920 * so op_free(PL_main_root) only ReREFCNT_dec's
921 * REGEXPs in the parent interpreter
922 * we need to manually ReREFCNT_dec for the clones
925 I32 i = AvFILLp(PL_regex_padav);
926 SV **ary = AvARRAY(PL_regex_padav);
929 SvREFCNT_dec(ary[i]);
930 ary[i] = &PL_sv_undef;
936 SvREFCNT_dec(MUTABLE_SV(PL_stashcache));
937 PL_stashcache = NULL;
939 /* loosen bonds of global variables */
941 /* XXX can PL_parser still be non-null here? */
942 if(PL_parser && PL_parser->rsfp) {
943 (void)PerlIO_close(PL_parser->rsfp);
944 PL_parser->rsfp = NULL;
948 Safefree(PL_splitstr);
958 PL_doswitches = FALSE;
959 PL_dowarn = G_WARN_OFF;
960 #ifdef PERL_SAWAMPERSAND
961 PL_sawampersand = 0; /* must save all match strings */
965 Safefree(PL_inplace);
967 SvREFCNT_dec(PL_patchlevel);
970 SvREFCNT_dec(PL_e_script);
976 /* magical thingies */
978 SvREFCNT_dec(PL_ofsgv); /* *, */
981 SvREFCNT_dec(PL_ors_sv); /* $\ */
984 SvREFCNT_dec(PL_rs); /* $/ */
987 Safefree(PL_osname); /* $^O */
990 SvREFCNT_dec(PL_statname);
994 /* defgv, aka *_ should be taken care of elsewhere */
997 Safefree(PL_efloatbuf);
1001 /* startup and shutdown function lists */
1002 SvREFCNT_dec(PL_beginav);
1003 SvREFCNT_dec(PL_beginav_save);
1004 SvREFCNT_dec(PL_endav);
1005 SvREFCNT_dec(PL_checkav);
1006 SvREFCNT_dec(PL_checkav_save);
1007 SvREFCNT_dec(PL_unitcheckav);
1008 SvREFCNT_dec(PL_unitcheckav_save);
1009 SvREFCNT_dec(PL_initav);
1011 PL_beginav_save = NULL;
1014 PL_checkav_save = NULL;
1015 PL_unitcheckav = NULL;
1016 PL_unitcheckav_save = NULL;
1019 /* shortcuts just get cleared */
1022 PL_argvoutgv = NULL;
1025 PL_last_in_gv = NULL;
1036 SvREFCNT_dec(PL_envgv);
1037 SvREFCNT_dec(PL_incgv);
1038 SvREFCNT_dec(PL_argvgv);
1039 SvREFCNT_dec(PL_replgv);
1040 SvREFCNT_dec(PL_DBgv);
1041 SvREFCNT_dec(PL_DBline);
1042 SvREFCNT_dec(PL_DBsub);
1051 SvREFCNT_dec(PL_argvout_stack);
1052 PL_argvout_stack = NULL;
1054 SvREFCNT_dec(PL_modglobal);
1055 PL_modglobal = NULL;
1056 SvREFCNT_dec(PL_preambleav);
1057 PL_preambleav = NULL;
1058 SvREFCNT_dec(PL_subname);
1060 #ifdef PERL_USES_PL_PIDSTATUS
1061 SvREFCNT_dec(PL_pidstatus);
1062 PL_pidstatus = NULL;
1064 SvREFCNT_dec(PL_toptarget);
1065 PL_toptarget = NULL;
1066 SvREFCNT_dec(PL_bodytarget);
1067 PL_bodytarget = NULL;
1068 PL_formtarget = NULL;
1070 /* free locale stuff */
1071 #ifdef USE_LOCALE_COLLATE
1072 Safefree(PL_collation_name);
1073 PL_collation_name = NULL;
1076 #ifdef USE_LOCALE_NUMERIC
1077 Safefree(PL_numeric_name);
1078 PL_numeric_name = NULL;
1079 SvREFCNT_dec(PL_numeric_radix_sv);
1080 PL_numeric_radix_sv = NULL;
1083 /* clear character classes */
1084 for (i = 0; i < POSIX_SWASH_COUNT; i++) {
1085 SvREFCNT_dec(PL_utf8_swash_ptrs[i]);
1086 PL_utf8_swash_ptrs[i] = NULL;
1088 SvREFCNT_dec(PL_utf8_mark);
1089 SvREFCNT_dec(PL_utf8_toupper);
1090 SvREFCNT_dec(PL_utf8_totitle);
1091 SvREFCNT_dec(PL_utf8_tolower);
1092 SvREFCNT_dec(PL_utf8_tofold);
1093 SvREFCNT_dec(PL_utf8_idstart);
1094 SvREFCNT_dec(PL_utf8_idcont);
1095 SvREFCNT_dec(PL_utf8_foldable);
1096 SvREFCNT_dec(PL_utf8_foldclosures);
1097 SvREFCNT_dec(PL_AboveLatin1);
1098 SvREFCNT_dec(PL_InBitmap);
1099 SvREFCNT_dec(PL_UpperLatin1);
1100 SvREFCNT_dec(PL_Latin1);
1101 SvREFCNT_dec(PL_NonL1NonFinalFold);
1102 SvREFCNT_dec(PL_HasMultiCharFold);
1103 #ifdef USE_LOCALE_CTYPE
1104 SvREFCNT_dec(PL_warn_locale);
1106 PL_utf8_mark = NULL;
1107 PL_utf8_toupper = NULL;
1108 PL_utf8_totitle = NULL;
1109 PL_utf8_tolower = NULL;
1110 PL_utf8_tofold = NULL;
1111 PL_utf8_idstart = NULL;
1112 PL_utf8_idcont = NULL;
1113 PL_utf8_foldclosures = NULL;
1114 PL_AboveLatin1 = NULL;
1116 PL_HasMultiCharFold = NULL;
1117 #ifdef USE_LOCALE_CTYPE
1118 PL_warn_locale = NULL;
1121 PL_NonL1NonFinalFold = NULL;
1122 PL_UpperLatin1 = NULL;
1123 for (i = 0; i < POSIX_CC_COUNT; i++) {
1124 SvREFCNT_dec(PL_XPosix_ptrs[i]);
1125 PL_XPosix_ptrs[i] = NULL;
1127 PL_GCB_invlist = NULL;
1128 PL_LB_invlist = NULL;
1129 PL_SB_invlist = NULL;
1130 PL_WB_invlist = NULL;
1131 PL_Assigned_invlist = NULL;
1133 if (!specialWARN(PL_compiling.cop_warnings))
1134 PerlMemShared_free(PL_compiling.cop_warnings);
1135 PL_compiling.cop_warnings = NULL;
1136 cophh_free(CopHINTHASH_get(&PL_compiling));
1137 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
1138 CopFILE_free(&PL_compiling);
1140 /* Prepare to destruct main symbol table. */
1143 /* break ref loop *:: <=> %:: */
1144 (void)hv_deletes(hv, "main::", G_DISCARD);
1147 SvREFCNT_dec(PL_curstname);
1148 PL_curstname = NULL;
1150 /* clear queued errors */
1151 SvREFCNT_dec(PL_errors);
1154 SvREFCNT_dec(PL_isarev);
1157 if (destruct_level >= 2) {
1158 if (PL_scopestack_ix != 0)
1159 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1160 "Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
1161 (long)PL_scopestack_ix);
1162 if (PL_savestack_ix != 0)
1163 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),
1164 "Unbalanced saves: %ld more saves than restores\n",
1165 (long)PL_savestack_ix);
1166 if (PL_tmps_floor != -1)
1167 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
1168 (long)PL_tmps_floor + 1);
1169 if (cxstack_ix != -1)
1170 Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
1171 (long)cxstack_ix + 1);
1175 SvREFCNT_dec(PL_regex_padav);
1176 PL_regex_padav = NULL;
1177 PL_regex_pad = NULL;
1180 #ifdef PERL_IMPLICIT_CONTEXT
1181 /* the entries in this list are allocated via SV PVX's, so get freed
1182 * in sv_clean_all */
1183 Safefree(PL_my_cxt_list);
1186 /* Now absolutely destruct everything, somehow or other, loops or no. */
1188 /* the 2 is for PL_fdpid and PL_strtab */
1189 while (sv_clean_all() > 2)
1193 Safefree(PL_stashpad); /* must come after sv_clean_all */
1196 AvREAL_off(PL_fdpid); /* no surviving entries */
1197 SvREFCNT_dec(PL_fdpid); /* needed in io_close() */
1200 #ifdef HAVE_INTERP_INTERN
1204 /* constant strings */
1205 for (i = 0; i < SV_CONSTS_COUNT; i++) {
1206 SvREFCNT_dec(PL_sv_consts[i]);
1207 PL_sv_consts[i] = NULL;
1210 /* Destruct the global string table. */
1212 /* Yell and reset the HeVAL() slots that are still holding refcounts,
1213 * so that sv_free() won't fail on them.
1214 * Now that the global string table is using a single hunk of memory
1215 * for both HE and HEK, we either need to explicitly unshare it the
1216 * correct way, or actually free things here.
1219 const I32 max = HvMAX(PL_strtab);
1220 HE * const * const array = HvARRAY(PL_strtab);
1221 HE *hent = array[0];
1224 if (hent && ckWARN_d(WARN_INTERNAL)) {
1225 HE * const next = HeNEXT(hent);
1226 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
1227 "Unbalanced string table refcount: (%ld) for \"%s\"",
1228 (long)hent->he_valu.hent_refcount, HeKEY(hent));
1235 hent = array[riter];
1240 HvARRAY(PL_strtab) = 0;
1241 HvTOTALKEYS(PL_strtab) = 0;
1243 SvREFCNT_dec(PL_strtab);
1246 /* free the pointer tables used for cloning */
1247 ptr_table_free(PL_ptr_table);
1248 PL_ptr_table = (PTR_TBL_t*)NULL;
1251 /* free special SVs */
1253 SvREFCNT(&PL_sv_yes) = 0;
1254 sv_clear(&PL_sv_yes);
1255 SvANY(&PL_sv_yes) = NULL;
1256 SvFLAGS(&PL_sv_yes) = 0;
1258 SvREFCNT(&PL_sv_no) = 0;
1259 sv_clear(&PL_sv_no);
1260 SvANY(&PL_sv_no) = NULL;
1261 SvFLAGS(&PL_sv_no) = 0;
1265 for (i=0; i<=2; i++) {
1266 SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
1267 sv_clear(PERL_DEBUG_PAD(i));
1268 SvANY(PERL_DEBUG_PAD(i)) = NULL;
1269 SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
1273 if (PL_sv_count != 0 && ckWARN_d(WARN_INTERNAL))
1274 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Scalars leaked: %ld\n", (long)PL_sv_count);
1276 #ifdef DEBUG_LEAKING_SCALARS
1277 if (PL_sv_count != 0) {
1282 for (sva = PL_sv_arenaroot; sva; sva = MUTABLE_SV(SvANY(sva))) {
1283 svend = &sva[SvREFCNT(sva)];
1284 for (sv = sva + 1; sv < svend; ++sv) {
1285 if (SvTYPE(sv) != (svtype)SVTYPEMASK) {
1286 PerlIO_printf(Perl_debug_log, "leaked: sv=0x%p"
1288 " refcnt=%"UVuf pTHX__FORMAT "\n"
1289 "\tallocated at %s:%d %s %s (parent 0x%" UVxf ");"
1290 "serial %" UVuf "\n",
1291 (void*)sv, (UV)sv->sv_flags, (UV)sv->sv_refcnt
1293 sv->sv_debug_file ? sv->sv_debug_file : "(unknown)",
1295 sv->sv_debug_inpad ? "for" : "by",
1296 sv->sv_debug_optype ?
1297 PL_op_name[sv->sv_debug_optype]: "(none)",
1298 PTR2UV(sv->sv_debug_parent),
1301 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1302 Perl_dump_sv_child(aTHX_ sv);
1308 #ifdef DEBUG_LEAKING_SCALARS_FORK_DUMP
1312 /* Wait for up to 4 seconds for child to terminate.
1313 This seems to be the least effort way of timing out on reaping
1315 struct timeval waitfor = {4, 0};
1316 int sock = PL_dumper_fd;
1320 FD_SET(sock, &rset);
1321 select(sock + 1, &rset, NULL, NULL, &waitfor);
1322 waitpid(child, &status, WNOHANG);
1327 #ifdef DEBUG_LEAKING_SCALARS_ABORT
1333 #if defined(PERLIO_LAYERS)
1334 /* No more IO - including error messages ! */
1335 PerlIO_cleanup(aTHX);
1338 /* sv_undef needs to stay immortal until after PerlIO_cleanup
1339 as currently layers use it rather than NULL as a marker
1340 for no arg - and will try and SvREFCNT_dec it.
1342 SvREFCNT(&PL_sv_undef) = 0;
1343 SvREADONLY_off(&PL_sv_undef);
1345 Safefree(PL_origfilename);
1346 PL_origfilename = NULL;
1347 Safefree(PL_reg_curpm);
1348 free_tied_hv_pool();
1349 Safefree(PL_op_mask);
1350 Safefree(PL_psig_name);
1351 PL_psig_name = (SV**)NULL;
1352 PL_psig_ptr = (SV**)NULL;
1354 /* We need to NULL PL_psig_pend first, so that
1355 signal handlers know not to use it */
1356 int *psig_save = PL_psig_pend;
1357 PL_psig_pend = (int*)NULL;
1358 Safefree(psig_save);
1361 TAINTING_set(FALSE);
1362 TAINT_WARN_set(FALSE);
1363 PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
1365 DEBUG_P(debprofdump());
1369 #ifdef USE_REENTRANT_API
1370 Perl_reentrant_free(aTHX);
1373 /* These all point to HVs that are about to be blown away.
1374 Code in core and on CPAN assumes that if the interpreter is re-started
1375 that they will be cleanly NULL or pointing to a valid HV. */
1376 PL_custom_op_names = NULL;
1377 PL_custom_op_descs = NULL;
1378 PL_custom_ops = NULL;
1382 while (PL_regmatch_slab) {
1383 regmatch_slab *s = PL_regmatch_slab;
1384 PL_regmatch_slab = PL_regmatch_slab->next;
1388 /* As the absolutely last thing, free the non-arena SV for mess() */
1391 /* we know that type == SVt_PVMG */
1393 /* it could have accumulated taint magic */
1396 for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
1397 moremagic = mg->mg_moremagic;
1398 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
1400 Safefree(mg->mg_ptr);
1404 /* we know that type >= SVt_PV */
1405 SvPV_free(PL_mess_sv);
1406 Safefree(SvANY(PL_mess_sv));
1407 Safefree(PL_mess_sv);
1414 =for apidoc perl_free
1416 Releases a Perl interpreter. See L<perlembed>.
1426 PERL_ARGS_ASSERT_PERL_FREE;
1428 if (PL_veto_cleanup)
1431 #ifdef PERL_TRACK_MEMPOOL
1434 * Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
1435 * value as we're probably hunting memory leaks then
1437 if (PL_perl_destruct_level == 0) {
1438 const U32 old_debug = PL_debug;
1439 /* Emulate the PerlHost behaviour of free()ing all memory allocated in this
1440 thread at thread exit. */
1442 PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
1443 "free this thread's memory\n");
1444 PL_debug &= ~ DEBUG_m_FLAG;
1446 while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header)){
1447 char * next = (char *)(aTHXx->Imemory_debug_header.next);
1448 Malloc_t ptr = PERL_MEMORY_DEBUG_HEADER_SIZE + next;
1451 PL_debug = old_debug;
1456 #if defined(WIN32) || defined(NETWARE)
1457 # if defined(PERL_IMPLICIT_SYS)
1460 void *host = nw_internal_host;
1461 PerlMem_free(aTHXx);
1462 nw_delete_internal_host(host);
1464 void *host = w32_internal_host;
1465 PerlMem_free(aTHXx);
1466 win32_delete_internal_host(host);
1470 PerlMem_free(aTHXx);
1473 PerlMem_free(aTHXx);
1477 #if defined(USE_ITHREADS)
1478 /* provide destructors to clean up the thread key when libperl is unloaded */
1479 #ifndef WIN32 /* handled during DLL_PROCESS_DETACH in win32/perllib.c */
1481 #if defined(__hpux) && !(defined(__ux_version) && __ux_version <= 1020) && !defined(__GNUC__)
1482 #pragma fini "perl_fini"
1483 #elif defined(__sun) && !defined(__GNUC__)
1484 #pragma fini (perl_fini)
1488 #if defined(__GNUC__)
1489 __attribute__((destructor))
1495 #ifdef PERL_GLOBAL_STRUCT_PRIVATE
1498 PL_curinterp && !PL_veto_cleanup)
1503 #endif /* THREADS */
1506 Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
1508 Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
1509 PL_exitlist[PL_exitlistlen].fn = fn;
1510 PL_exitlist[PL_exitlistlen].ptr = ptr;
1515 =for apidoc perl_parse
1517 Tells a Perl interpreter to parse a Perl script. See L<perlembed>.
1522 #define SET_CURSTASH(newstash) \
1523 if (PL_curstash != newstash) { \
1524 SvREFCNT_dec(PL_curstash); \
1525 PL_curstash = (HV *)SvREFCNT_inc(newstash); \
1529 perl_parse(pTHXx_ XSINIT_t xsinit, int argc, char **argv, char **env)
1536 PERL_ARGS_ASSERT_PERL_PARSE;
1537 #ifndef MULTIPLICITY
1538 PERL_UNUSED_ARG(my_perl);
1540 #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) || defined(USE_HASH_SEED_DEBUG)) && !defined(NO_PERL_HASH_SEED_DEBUG)
1542 const char * const s = PerlEnv_getenv("PERL_HASH_SEED_DEBUG");
1544 if (s && strEQ(s, "1")) {
1545 const unsigned char *seed= PERL_HASH_SEED;
1546 const unsigned char *seed_end= PERL_HASH_SEED + PERL_HASH_SEED_BYTES;
1547 PerlIO_printf(Perl_debug_log, "HASH_FUNCTION = %s HASH_SEED = 0x", PERL_HASH_FUNC);
1548 while (seed < seed_end) {
1549 PerlIO_printf(Perl_debug_log, "%02x", *seed++);
1551 #ifdef PERL_HASH_RANDOMIZE_KEYS
1552 PerlIO_printf(Perl_debug_log, " PERTURB_KEYS = %d (%s)",
1553 PL_HASH_RAND_BITS_ENABLED,
1554 PL_HASH_RAND_BITS_ENABLED == 0 ? "NO" : PL_HASH_RAND_BITS_ENABLED == 1 ? "RANDOM" : "DETERMINISTIC");
1556 PerlIO_printf(Perl_debug_log, "\n");
1559 #endif /* #if (defined(USE_HASH_SEED) || defined(USE_HASH_SEED_EXPLICIT) ... */
1563 struct NameTranslationInfo nti;
1564 __translate_amiga_to_unix_path_name(&argv[0],&nti);
1571 if (PL_origalen != 0) {
1572 PL_origalen = 1; /* don't use old PL_origalen if perl_parse() is called again */
1575 /* Set PL_origalen be the sum of the contiguous argv[]
1576 * elements plus the size of the env in case that it is
1577 * contiguous with the argv[]. This is used in mg.c:Perl_magic_set()
1578 * as the maximum modifiable length of $0. In the worst case
1579 * the area we are able to modify is limited to the size of
1580 * the original argv[0]. (See below for 'contiguous', though.)
1582 const char *s = NULL;
1583 const UV mask = ~(UV)(PTRSIZE-1);
1584 /* Do the mask check only if the args seem like aligned. */
1586 (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
1588 /* See if all the arguments are contiguous in memory. Note
1589 * that 'contiguous' is a loose term because some platforms
1590 * align the argv[] and the envp[]. If the arguments look
1591 * like non-aligned, assume that they are 'strictly' or
1592 * 'traditionally' contiguous. If the arguments look like
1593 * aligned, we just check that they are within aligned
1594 * PTRSIZE bytes. As long as no system has something bizarre
1595 * like the argv[] interleaved with some other data, we are
1596 * fine. (Did I just evoke Murphy's Law?) --jhi */
1597 if (PL_origargv && PL_origargc >= 1 && (s = PL_origargv[0])) {
1600 for (i = 1; i < PL_origargc; i++) {
1601 if ((PL_origargv[i] == s + 1
1603 || PL_origargv[i] == s + 2
1608 (PL_origargv[i] > s &&
1610 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1621 #ifndef PERL_USE_SAFE_PUTENV
1622 /* Can we grab env area too to be used as the area for $0? */
1623 if (s && PL_origenviron && !PL_use_safe_putenv) {
1624 if ((PL_origenviron[0] == s + 1)
1627 (PL_origenviron[0] > s &&
1628 PL_origenviron[0] <=
1629 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1633 #ifndef OS2 /* ENVIRON is read by the kernel too. */
1634 s = PL_origenviron[0];
1637 my_setenv("NoNe SuCh", NULL);
1638 /* Force copy of environment. */
1639 for (i = 1; PL_origenviron[i]; i++) {
1640 if (PL_origenviron[i] == s + 1
1643 (PL_origenviron[i] > s &&
1644 PL_origenviron[i] <=
1645 INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
1648 s = PL_origenviron[i];
1656 #endif /* !defined(PERL_USE_SAFE_PUTENV) */
1658 PL_origalen = s ? s - PL_origargv[0] + 1 : 0;
1663 /* Come here if running an undumped a.out. */
1665 PL_origfilename = savepv(argv[0]);
1666 PL_do_undump = FALSE;
1667 cxstack_ix = -1; /* start label stack again */
1669 assert (!TAINT_get);
1673 init_postdump_symbols(argc,argv,env);
1678 op_free(PL_main_root);
1679 PL_main_root = NULL;
1681 PL_main_start = NULL;
1682 SvREFCNT_dec(PL_main_cv);
1686 oldscope = PL_scopestack_ix;
1687 PL_dowarn = G_WARN_OFF;
1692 parse_body(env,xsinit);
1693 if (PL_unitcheckav) {
1694 call_list(oldscope, PL_unitcheckav);
1697 PERL_SET_PHASE(PERL_PHASE_CHECK);
1698 call_list(oldscope, PL_checkav);
1706 /* my_exit() was called */
1707 while (PL_scopestack_ix > oldscope)
1710 SET_CURSTASH(PL_defstash);
1711 if (PL_unitcheckav) {
1712 call_list(oldscope, PL_unitcheckav);
1715 PERL_SET_PHASE(PERL_PHASE_CHECK);
1716 call_list(oldscope, PL_checkav);
1721 PerlIO_printf(Perl_error_log, "panic: top_env\n");
1729 /* This needs to stay in perl.c, as perl.c is compiled with different flags for
1730 miniperl, and we need to see those flags reflected in the values here. */
1732 /* What this returns is subject to change. Use the public interface in Config.
1735 S_Internals_V(pTHX_ CV *cv)
1738 #ifdef LOCAL_PATCH_COUNT
1739 const int local_patch_count = LOCAL_PATCH_COUNT;
1741 const int local_patch_count = 0;
1743 const int entries = 3 + local_patch_count;
1745 static const char non_bincompat_options[] =
1752 # ifdef NO_HASH_SEED
1755 # ifdef NO_TAINT_SUPPORT
1758 # ifdef PERL_BOOL_AS_CHAR
1759 " PERL_BOOL_AS_CHAR"
1761 # ifdef PERL_COPY_ON_WRITE
1762 " PERL_COPY_ON_WRITE"
1764 # ifdef PERL_DISABLE_PMC
1767 # ifdef PERL_DONT_CREATE_GVSV
1768 " PERL_DONT_CREATE_GVSV"
1770 # ifdef PERL_EXTERNAL_GLOB
1771 " PERL_EXTERNAL_GLOB"
1773 # ifdef PERL_HASH_FUNC_SIPHASH
1774 " PERL_HASH_FUNC_SIPHASH"
1776 # ifdef PERL_HASH_FUNC_SDBM
1777 " PERL_HASH_FUNC_SDBM"
1779 # ifdef PERL_HASH_FUNC_DJB2
1780 " PERL_HASH_FUNC_DJB2"
1782 # ifdef PERL_HASH_FUNC_SUPERFAST
1783 " PERL_HASH_FUNC_SUPERFAST"
1785 # ifdef PERL_HASH_FUNC_MURMUR3
1786 " PERL_HASH_FUNC_MURMUR3"
1788 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME
1789 " PERL_HASH_FUNC_ONE_AT_A_TIME"
1791 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_HARD
1792 " PERL_HASH_FUNC_ONE_AT_A_TIME_HARD"
1794 # ifdef PERL_HASH_FUNC_ONE_AT_A_TIME_OLD
1795 " PERL_HASH_FUNC_ONE_AT_A_TIME_OLD"
1797 # ifdef PERL_IS_MINIPERL
1800 # ifdef PERL_MALLOC_WRAP
1803 # ifdef PERL_MEM_LOG
1806 # ifdef PERL_MEM_LOG_NOIMPL
1807 " PERL_MEM_LOG_NOIMPL"
1809 # ifdef PERL_OP_PARENT
1812 # ifdef PERL_PERTURB_KEYS_DETERMINISTIC
1813 " PERL_PERTURB_KEYS_DETERMINISTIC"
1815 # ifdef PERL_PERTURB_KEYS_DISABLED
1816 " PERL_PERTURB_KEYS_DISABLED"
1818 # ifdef PERL_PERTURB_KEYS_RANDOM
1819 " PERL_PERTURB_KEYS_RANDOM"
1821 # ifdef PERL_PRESERVE_IVUV
1822 " PERL_PRESERVE_IVUV"
1824 # ifdef PERL_RELOCATABLE_INCPUSH
1825 " PERL_RELOCATABLE_INCPUSH"
1827 # ifdef PERL_USE_DEVEL
1830 # ifdef PERL_USE_SAFE_PUTENV
1831 " PERL_USE_SAFE_PUTENV"
1833 # ifdef SILENT_NO_TAINT_SUPPORT
1834 " SILENT_NO_TAINT_SUPPORT"
1836 # ifdef UNLINK_ALL_VERSIONS
1837 " UNLINK_ALL_VERSIONS"
1839 # ifdef USE_ATTRIBUTES_FOR_PERLIO
1840 " USE_ATTRIBUTES_FOR_PERLIO"
1842 # ifdef USE_FAST_STDIO
1845 # ifdef USE_HASH_SEED_EXPLICIT
1846 " USE_HASH_SEED_EXPLICIT"
1851 # ifdef USE_LOCALE_CTYPE
1854 # ifdef WIN32_NO_REGISTRY
1857 # ifdef USE_PERL_ATOF
1860 # ifdef USE_SITECUSTOMIZE
1861 " USE_SITECUSTOMIZE"
1864 PERL_UNUSED_ARG(cv);
1865 PERL_UNUSED_VAR(items);
1867 EXTEND(SP, entries);
1869 PUSHs(sv_2mortal(newSVpv(PL_bincompat_options, 0)));
1870 PUSHs(Perl_newSVpvn_flags(aTHX_ non_bincompat_options,
1871 sizeof(non_bincompat_options) - 1, SVs_TEMP));
1873 #ifndef PERL_BUILD_DATE
1876 # define PERL_BUILD_DATE __DATE__ " " __TIME__
1878 # define PERL_BUILD_DATE __DATE__
1883 #ifdef PERL_BUILD_DATE
1884 PUSHs(Perl_newSVpvn_flags(aTHX_
1885 STR_WITH_LEN("Compiled at " PERL_BUILD_DATE),
1888 PUSHs(&PL_sv_undef);
1891 for (i = 1; i <= local_patch_count; i++) {
1892 /* This will be an undef, if PL_localpatches[i] is NULL. */
1893 PUSHs(sv_2mortal(newSVpv(PL_localpatches[i], 0)));
1899 #define INCPUSH_UNSHIFT 0x01
1900 #define INCPUSH_ADD_OLD_VERS 0x02
1901 #define INCPUSH_ADD_VERSIONED_SUB_DIRS 0x04
1902 #define INCPUSH_ADD_ARCHONLY_SUB_DIRS 0x08
1903 #define INCPUSH_NOT_BASEDIR 0x10
1904 #define INCPUSH_CAN_RELOCATE 0x20
1905 #define INCPUSH_ADD_SUB_DIRS \
1906 (INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_ADD_ARCHONLY_SUB_DIRS)
1909 S_parse_body(pTHX_ char **env, XSINIT_t xsinit)
1913 int argc = PL_origargc;
1914 char **argv = PL_origargv;
1915 const char *scriptname = NULL;
1916 bool dosearch = FALSE;
1918 bool doextract = FALSE;
1919 const char *cddir = NULL;
1920 #ifdef USE_SITECUSTOMIZE
1921 bool minus_f = FALSE;
1923 SV *linestr_sv = NULL;
1924 bool add_read_e_script = FALSE;
1925 U32 lex_start_flags = 0;
1927 PERL_SET_PHASE(PERL_PHASE_START);
1933 for (argc--,argv++; argc > 0; argc--,argv++) {
1934 if (argv[0][0] != '-' || !argv[0][1])
1940 #ifndef PERL_STRICT_CR
1964 if ((s = moreswitches(s)))
1969 #if defined(SILENT_NO_TAINT_SUPPORT)
1970 /* silently ignore */
1971 #elif defined(NO_TAINT_SUPPORT)
1972 Perl_croak_nocontext("This perl was compiled without taint support. "
1973 "Cowardly refusing to run with -t or -T flags");
1975 CHECK_MALLOC_TOO_LATE_FOR('t');
1976 if( !TAINTING_get ) {
1977 TAINT_WARN_set(TRUE);
1984 #if defined(SILENT_NO_TAINT_SUPPORT)
1985 /* silently ignore */
1986 #elif defined(NO_TAINT_SUPPORT)
1987 Perl_croak_nocontext("This perl was compiled without taint support. "
1988 "Cowardly refusing to run with -t or -T flags");
1990 CHECK_MALLOC_TOO_LATE_FOR('T');
1992 TAINT_WARN_set(FALSE);
2001 forbid_setid('e', FALSE);
2003 PL_e_script = newSVpvs("");
2004 add_read_e_script = TRUE;
2007 sv_catpv(PL_e_script, s);
2009 sv_catpv(PL_e_script, argv[1]);
2013 Perl_croak(aTHX_ "No code specified for -%c", c);
2014 sv_catpvs(PL_e_script, "\n");
2018 #ifdef USE_SITECUSTOMIZE
2024 case 'I': /* -I handled both here and in moreswitches() */
2025 forbid_setid('I', FALSE);
2026 if (!*++s && (s=argv[1]) != NULL) {
2030 STRLEN len = strlen(s);
2031 incpush(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
2034 Perl_croak(aTHX_ "No directory specified for -I");
2037 forbid_setid('S', FALSE);
2046 opts_prog = newSVpvs("use Config; Config::_V()");
2050 opts_prog = Perl_newSVpvf(aTHX_
2051 "use Config; Config::config_vars(qw%c%s%c)",
2055 Perl_av_create_and_push(aTHX_ &PL_preambleav, opts_prog);
2056 /* don't look for script or read stdin */
2057 scriptname = BIT_BUCKET;
2069 if (!*++s || isSPACE(*s)) {
2073 /* catch use of gnu style long options.
2074 Both of these exit immediately. */
2075 if (strEQ(s, "version"))
2077 if (strEQ(s, "help"))
2082 Perl_croak(aTHX_ "Unrecognized switch: -%s (-h will show valid options)",s);
2093 #ifndef SECURE_INTERNAL_GETENV
2096 (s = PerlEnv_getenv("PERL5OPT")))
2098 /* s points to static memory in getenv(), which may be overwritten at
2099 * any time; use a mortal copy instead */
2100 s = SvPVX(sv_2mortal(newSVpv(s, 0)));
2104 if (*s == '-' && *(s+1) == 'T') {
2105 #if defined(SILENT_NO_TAINT_SUPPORT)
2106 /* silently ignore */
2107 #elif defined(NO_TAINT_SUPPORT)
2108 Perl_croak_nocontext("This perl was compiled without taint support. "
2109 "Cowardly refusing to run with -t or -T flags");
2111 CHECK_MALLOC_TOO_LATE_FOR('T');
2113 TAINT_WARN_set(FALSE);
2117 char *popt_copy = NULL;
2130 if (!strchr("CDIMUdmtwW", *s))
2131 Perl_croak(aTHX_ "Illegal switch in PERL5OPT: -%c", *s);
2135 popt_copy = SvPVX(sv_2mortal(newSVpv(d,0)));
2136 s = popt_copy + (s - d);
2144 #if defined(SILENT_NO_TAINT_SUPPORT)
2145 /* silently ignore */
2146 #elif defined(NO_TAINT_SUPPORT)
2147 Perl_croak_nocontext("This perl was compiled without taint support. "
2148 "Cowardly refusing to run with -t or -T flags");
2150 if( !TAINTING_get) {
2151 TAINT_WARN_set(TRUE);
2163 /* Set $^X early so that it can be used for relocatable paths in @INC */
2164 /* and for SITELIB_EXP in USE_SITECUSTOMIZE */
2165 assert (!TAINT_get);
2170 #if defined(USE_SITECUSTOMIZE)
2172 /* The games with local $! are to avoid setting errno if there is no
2173 sitecustomize script. "q%c...%c", 0, ..., 0 becomes "q\0...\0",
2174 ie a q() operator with a NUL byte as a the delimiter. This avoids
2175 problems with pathnames containing (say) ' */
2176 # ifdef PERL_IS_MINIPERL
2177 AV *const inc = GvAV(PL_incgv);
2178 SV **const inc0 = inc ? av_fetch(inc, 0, FALSE) : NULL;
2181 /* if lib/buildcustomize.pl exists, it should not fail. If it does,
2182 it should be reported immediately as a build failure. */
2183 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2185 "BEGIN { my $f = q%c%s%" SVf "/buildcustomize.pl%c; "
2186 "do {local $!; -f $f }"
2187 " and do $f || die $@ || qq '$f: $!' }",
2188 0, (TAINTING_get ? "./" : ""), SVfARG(*inc0), 0));
2191 /* SITELIB_EXP is a function call on Win32. */
2192 const char *const raw_sitelib = SITELIB_EXP;
2194 /* process .../.. if PERL_RELOCATABLE_INC is defined */
2195 SV *sitelib_sv = mayberelocate(raw_sitelib, strlen(raw_sitelib),
2196 INCPUSH_CAN_RELOCATE);
2197 const char *const sitelib = SvPVX(sitelib_sv);
2198 (void)Perl_av_create_and_unshift_one(aTHX_ &PL_preambleav,
2200 "BEGIN { do {local $!; -f q%c%s/sitecustomize.pl%c} && do q%c%s/sitecustomize.pl%c }",
2201 0, SVfARG(sitelib), 0,
2202 0, SVfARG(sitelib), 0));
2203 assert (SvREFCNT(sitelib_sv) == 1);
2204 SvREFCNT_dec(sitelib_sv);
2211 scriptname = argv[0];
2214 scriptname = BIT_BUCKET; /* don't look for script or read stdin */
2216 else if (scriptname == NULL) {
2218 if ( PerlLIO_isatty(PerlIO_fileno(PerlIO_stdin())) )
2224 assert (!TAINT_get);
2228 bool suidscript = FALSE;
2230 rsfp = open_script(scriptname, dosearch, &suidscript);
2232 rsfp = PerlIO_stdin();
2233 lex_start_flags = LEX_DONT_CLOSE_RSFP;
2236 validate_suid(rsfp);
2239 # if defined(SIGCHLD) || defined(SIGCLD)
2242 # define SIGCHLD SIGCLD
2244 Sighandler_t sigstate = rsignal_state(SIGCHLD);
2245 if (sigstate == (Sighandler_t) SIG_IGN) {
2246 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
2247 "Can't ignore signal CHLD, forcing to default");
2248 (void)rsignal(SIGCHLD, (Sighandler_t)SIG_DFL);
2256 /* This will croak if suidscript is true, as -x cannot be used with
2258 forbid_setid('x', suidscript);
2259 /* Hence you can't get here if suidscript is true */
2261 linestr_sv = newSV_type(SVt_PV);
2262 lex_start_flags |= LEX_START_COPIED;
2263 find_beginning(linestr_sv, rsfp);
2264 if (cddir && PerlDir_chdir( (char *)cddir ) < 0)
2265 Perl_croak(aTHX_ "Can't chdir to %s",cddir);
2269 PL_main_cv = PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
2270 CvUNIQUE_on(PL_compcv);
2272 CvPADLIST_set(PL_compcv, pad_new(0));
2274 PL_isarev = newHV();
2277 boot_core_UNIVERSAL();
2279 newXS("Internals::V", S_Internals_V, __FILE__);
2282 (*xsinit)(aTHX); /* in case linked C routines want magical variables */
2284 #if defined(VMS) || defined(WIN32) || defined(DJGPP) || defined(__CYGWIN__) || defined(SYMBIAN)
2290 # ifdef HAS_SOCKS5_INIT
2291 socks5_init(argv[0]);
2297 init_predump_symbols();
2298 /* init_postdump_symbols not currently designed to be called */
2299 /* more than once (ENV isn't cleared first, for example) */
2300 /* But running with -u leaves %ENV & @ARGV undefined! XXX */
2302 init_postdump_symbols(argc,argv,env);
2304 /* PL_unicode is turned on by -C, or by $ENV{PERL_UNICODE},
2305 * or explicitly in some platforms.
2306 * PL_utf8locale is conditionally turned on by
2307 * locale.c:Perl_init_i18nl10n() if the environment
2308 * look like the user wants to use UTF-8. */
2309 #if defined(__SYMBIAN32__)
2310 PL_unicode = PERL_UNICODE_STD_FLAG; /* See PERL_SYMBIAN_CONSOLE_UTF8. */
2312 # ifndef PERL_IS_MINIPERL
2314 /* Requires init_predump_symbols(). */
2315 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
2320 /* Turn on UTF-8-ness on STDIN, STDOUT, STDERR
2321 * and the default open disciplines. */
2322 if ((PL_unicode & PERL_UNICODE_STDIN_FLAG) &&
2323 PL_stdingv && (io = GvIO(PL_stdingv)) &&
2325 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2326 if ((PL_unicode & PERL_UNICODE_STDOUT_FLAG) &&
2327 PL_defoutgv && (io = GvIO(PL_defoutgv)) &&
2329 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2330 if ((PL_unicode & PERL_UNICODE_STDERR_FLAG) &&
2331 PL_stderrgv && (io = GvIO(PL_stderrgv)) &&
2333 PerlIO_binmode(aTHX_ fp, IoTYPE(io), 0, ":utf8");
2334 if ((PL_unicode & PERL_UNICODE_INOUT_FLAG) &&
2335 (sv = GvSV(gv_fetchpvs("\017PEN", GV_ADD|GV_NOTQUAL,
2337 U32 in = PL_unicode & PERL_UNICODE_IN_FLAG;
2338 U32 out = PL_unicode & PERL_UNICODE_OUT_FLAG;
2341 sv_setpvs(sv, ":utf8\0:utf8");
2343 sv_setpvs(sv, ":utf8\0");
2346 sv_setpvs(sv, "\0:utf8");
2355 if ((s = PerlEnv_getenv("PERL_SIGNALS"))) {
2356 if (strEQ(s, "unsafe"))
2357 PL_signals |= PERL_SIGNALS_UNSAFE_FLAG;
2358 else if (strEQ(s, "safe"))
2359 PL_signals &= ~PERL_SIGNALS_UNSAFE_FLAG;
2361 Perl_croak(aTHX_ "PERL_SIGNALS illegal: \"%s\"", s);
2366 lex_start(linestr_sv, rsfp, lex_start_flags);
2367 SvREFCNT_dec(linestr_sv);
2369 PL_subname = newSVpvs("main");
2371 if (add_read_e_script)
2372 filter_add(read_e_script, NULL);
2374 /* now parse the script */
2376 SETERRNO(0,SS_NORMAL);
2377 if (yyparse(GRAMPROG) || PL_parser->error_count) {
2378 abort_execution("", PL_origfilename);
2380 CopLINE_set(PL_curcop, 0);
2381 SET_CURSTASH(PL_defstash);
2383 SvREFCNT_dec(PL_e_script);
2391 SAVECOPFILE(PL_curcop);
2392 SAVECOPLINE(PL_curcop);
2393 gv_check(PL_defstash);
2403 s = PerlEnv_getenv("PERL_DEBUG_MSTATS");
2404 if (s && grok_atoUV(s, &uv, NULL) && uv >= 2)
2405 dump_mstats("after compilation:");
2410 PL_restartjmpenv = NULL;
2416 =for apidoc perl_run
2418 Tells a Perl interpreter to run. See L<perlembed>.
2430 PERL_ARGS_ASSERT_PERL_RUN;
2431 #ifndef MULTIPLICITY
2432 PERL_UNUSED_ARG(my_perl);
2435 oldscope = PL_scopestack_ix;
2443 cxstack_ix = -1; /* start context stack again */
2445 case 0: /* normal completion */
2449 case 2: /* my_exit() */
2450 while (PL_scopestack_ix > oldscope)
2453 SET_CURSTASH(PL_defstash);
2454 if (!(PL_exit_flags & PERL_EXIT_DESTRUCT_END) &&
2455 PL_endav && !PL_minus_c) {
2456 PERL_SET_PHASE(PERL_PHASE_END);
2457 call_list(oldscope, PL_endav);
2460 if (PerlEnv_getenv("PERL_DEBUG_MSTATS"))
2461 dump_mstats("after execution: ");
2467 POPSTACK_TO(PL_mainstack);
2470 PerlIO_printf(Perl_error_log, "panic: restartop in perl_run\n");
2481 S_run_body(pTHX_ I32 oldscope)
2483 DEBUG_r(PerlIO_printf(Perl_debug_log, "%s $` $& $' support (0x%x).\n",
2484 PL_sawampersand ? "Enabling" : "Omitting",
2485 (unsigned int)(PL_sawampersand)));
2487 if (!PL_restartop) {
2489 if (DEBUG_x_TEST || DEBUG_B_TEST)
2490 dump_all_perl(!DEBUG_B_TEST);
2492 PERL_DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
2496 PerlIO_printf(Perl_error_log, "%s syntax OK\n", PL_origfilename);
2499 if (PERLDB_SINGLE && PL_DBsingle)
2502 PERL_SET_PHASE(PERL_PHASE_INIT);
2503 call_list(oldscope, PL_initav);
2505 #ifdef PERL_DEBUG_READONLY_OPS
2506 if (PL_main_root && PL_main_root->op_slabbed)
2507 Slab_to_ro(OpSLAB(PL_main_root));
2513 PERL_SET_PHASE(PERL_PHASE_RUN);
2516 PL_restartjmpenv = NULL;
2517 PL_op = PL_restartop;
2521 else if (PL_main_start) {
2522 CvDEPTH(PL_main_cv) = 1;
2523 PL_op = PL_main_start;
2527 NOT_REACHED; /* NOTREACHED */
2531 =head1 SV Manipulation Functions
2533 =for apidoc p||get_sv
2535 Returns the SV of the specified Perl scalar. C<flags> are passed to
2536 C<gv_fetchpv>. If C<GV_ADD> is set and the
2537 Perl variable does not exist then it will be created. If C<flags> is zero
2538 and the variable does not exist then NULL is returned.
2544 Perl_get_sv(pTHX_ const char *name, I32 flags)
2548 PERL_ARGS_ASSERT_GET_SV;
2550 gv = gv_fetchpv(name, flags, SVt_PV);
2557 =head1 Array Manipulation Functions
2559 =for apidoc p||get_av
2561 Returns the AV of the specified Perl global or package array with the given
2562 name (so it won't work on lexical variables). C<flags> are passed
2563 to C<gv_fetchpv>. If C<GV_ADD> is set and the
2564 Perl variable does not exist then it will be created. If C<flags> is zero
2565 and the variable does not exist then NULL is returned.
2567 Perl equivalent: C<@{"$name"}>.
2573 Perl_get_av(pTHX_ const char *name, I32 flags)
2575 GV* const gv = gv_fetchpv(name, flags, SVt_PVAV);
2577 PERL_ARGS_ASSERT_GET_AV;
2587 =head1 Hash Manipulation Functions
2589 =for apidoc p||get_hv
2591 Returns the HV of the specified Perl hash. C<flags> are passed to
2592 C<gv_fetchpv>. If C<GV_ADD> is set and the
2593 Perl variable does not exist then it will be created. If C<flags> is zero
2594 and the variable does not exist then C<NULL> is returned.
2600 Perl_get_hv(pTHX_ const char *name, I32 flags)
2602 GV* const gv = gv_fetchpv(name, flags, SVt_PVHV);
2604 PERL_ARGS_ASSERT_GET_HV;
2614 =head1 CV Manipulation Functions
2616 =for apidoc p||get_cvn_flags
2618 Returns the CV of the specified Perl subroutine. C<flags> are passed to
2619 C<gv_fetchpvn_flags>. If C<GV_ADD> is set and the Perl subroutine does not
2620 exist then it will be declared (which has the same effect as saying
2621 C<sub name;>). If C<GV_ADD> is not set and the subroutine does not exist
2622 then NULL is returned.
2624 =for apidoc p||get_cv
2626 Uses C<strlen> to get the length of C<name>, then calls C<get_cvn_flags>.
2632 Perl_get_cvn_flags(pTHX_ const char *name, STRLEN len, I32 flags)
2634 GV* const gv = gv_fetchpvn_flags(name, len, flags, SVt_PVCV);
2636 PERL_ARGS_ASSERT_GET_CVN_FLAGS;
2638 /* XXX this is probably not what they think they're getting.
2639 * It has the same effect as "sub name;", i.e. just a forward
2641 if ((flags & ~GV_NOADD_MASK) && !GvCVu(gv)) {
2642 return newSTUB(gv,0);
2649 /* Nothing in core calls this now, but we can't replace it with a macro and
2650 move it to mathoms.c as a macro would evaluate name twice. */
2652 Perl_get_cv(pTHX_ const char *name, I32 flags)
2654 PERL_ARGS_ASSERT_GET_CV;
2656 return get_cvn_flags(name, strlen(name), flags);
2659 /* Be sure to refetch the stack pointer after calling these routines. */
2663 =head1 Callback Functions
2665 =for apidoc p||call_argv
2667 Performs a callback to the specified named and package-scoped Perl subroutine
2668 with C<argv> (a C<NULL>-terminated array of strings) as arguments. See
2671 Approximate Perl equivalent: C<&{"$sub_name"}(@$argv)>.
2677 Perl_call_argv(pTHX_ const char *sub_name, I32 flags, char **argv)
2679 /* See G_* flags in cop.h */
2680 /* null terminated arg list */
2684 PERL_ARGS_ASSERT_CALL_ARGV;
2688 mXPUSHs(newSVpv(*argv,0));
2692 return call_pv(sub_name, flags);
2696 =for apidoc p||call_pv
2698 Performs a callback to the specified Perl sub. See L<perlcall>.
2704 Perl_call_pv(pTHX_ const char *sub_name, I32 flags)
2705 /* name of the subroutine */
2706 /* See G_* flags in cop.h */
2708 PERL_ARGS_ASSERT_CALL_PV;
2710 return call_sv(MUTABLE_SV(get_cv(sub_name, GV_ADD)), flags);
2714 =for apidoc p||call_method
2716 Performs a callback to the specified Perl method. The blessed object must
2717 be on the stack. See L<perlcall>.
2723 Perl_call_method(pTHX_ const char *methname, I32 flags)
2724 /* name of the subroutine */
2725 /* See G_* flags in cop.h */
2729 PERL_ARGS_ASSERT_CALL_METHOD;
2731 len = strlen(methname);
2732 sv = flags & G_METHOD_NAMED
2733 ? sv_2mortal(newSVpvn_share(methname, len,0))
2734 : newSVpvn_flags(methname, len, SVs_TEMP);
2736 return call_sv(sv, flags | G_METHOD);
2739 /* May be called with any of a CV, a GV, or an SV containing the name. */
2741 =for apidoc p||call_sv
2743 Performs a callback to the Perl sub specified by the SV.
2745 If neither the C<G_METHOD> nor C<G_METHOD_NAMED> flag is supplied, the
2746 SV may be any of a CV, a GV, a reference to a CV, a reference to a GV
2747 or C<SvPV(sv)> will be used as the name of the sub to call.
2749 If the C<G_METHOD> flag is supplied, the SV may be a reference to a CV or
2750 C<SvPV(sv)> will be used as the name of the method to call.
2752 If the C<G_METHOD_NAMED> flag is supplied, C<SvPV(sv)> will be used as
2753 the name of the method to call.
2755 Some other values are treated specially for internal use and should
2764 Perl_call_sv(pTHX_ SV *sv, VOL I32 flags)
2765 /* See G_* flags in cop.h */
2768 LOGOP myop; /* fake syntax tree node */
2772 bool oldcatch = CATCH_GET;
2774 OP* const oldop = PL_op;
2777 PERL_ARGS_ASSERT_CALL_SV;
2779 if (flags & G_DISCARD) {
2783 if (!(flags & G_WANT)) {
2784 /* Backwards compatibility - as G_SCALAR was 0, it could be omitted.
2789 Zero(&myop, 1, LOGOP);
2790 if (!(flags & G_NOARGS))
2791 myop.op_flags |= OPf_STACKED;
2792 myop.op_flags |= OP_GIMME_REVERSE(flags);
2796 if (!(flags & G_METHOD_NAMED)) {
2804 if (PERLDB_SUB && PL_curstash != PL_debstash
2805 /* Handle first BEGIN of -d. */
2806 && (PL_DBcv || (PL_DBcv = GvCV(PL_DBsub)))
2807 /* Try harder, since this may have been a sighandler, thus
2808 * curstash may be meaningless. */
2809 && (SvTYPE(sv) != SVt_PVCV || CvSTASH((const CV *)sv) != PL_debstash)
2810 && !(flags & G_NODEBUG))
2811 myop.op_private |= OPpENTERSUB_DB;
2813 if (flags & (G_METHOD|G_METHOD_NAMED)) {
2814 Zero(&method_op, 1, METHOP);
2815 method_op.op_next = (OP*)&myop;
2816 PL_op = (OP*)&method_op;
2817 if ( flags & G_METHOD_NAMED ) {
2818 method_op.op_ppaddr = PL_ppaddr[OP_METHOD_NAMED];
2819 method_op.op_type = OP_METHOD_NAMED;
2820 method_op.op_u.op_meth_sv = sv;
2822 method_op.op_ppaddr = PL_ppaddr[OP_METHOD];
2823 method_op.op_type = OP_METHOD;
2825 myop.op_ppaddr = PL_ppaddr[OP_ENTERSUB];
2826 myop.op_type = OP_ENTERSUB;
2829 if (!(flags & G_EVAL)) {
2831 CALL_BODY_SUB((OP*)&myop);
2832 retval = PL_stack_sp - (PL_stack_base + oldmark);
2833 CATCH_SET(oldcatch);
2837 myop.op_other = (OP*)&myop;
2839 old_cxix = cxstack_ix;
2840 create_eval_scope(NULL, flags|G_FAKINGEVAL);
2848 CALL_BODY_SUB((OP*)&myop);
2849 retval = PL_stack_sp - (PL_stack_base + oldmark);
2850 if (!(flags & G_KEEPERR)) {
2858 /* my_exit() was called */
2859 SET_CURSTASH(PL_defstash);
2863 NOT_REACHED; /* NOTREACHED */
2866 PL_restartjmpenv = NULL;
2867 PL_op = PL_restartop;
2871 PL_stack_sp = PL_stack_base + oldmark;
2872 if ((flags & G_WANT) == G_ARRAY)
2876 *++PL_stack_sp = &PL_sv_undef;
2881 /* if we croaked, depending on how we croaked the eval scope
2882 * may or may not have already been popped */
2883 if (cxstack_ix > old_cxix) {
2884 assert(cxstack_ix == old_cxix + 1);
2885 assert(CxTYPE(CX_CUR()) == CXt_EVAL);
2886 delete_eval_scope();
2891 if (flags & G_DISCARD) {
2892 PL_stack_sp = PL_stack_base + oldmark;
2901 /* Eval a string. The G_EVAL flag is always assumed. */
2904 =for apidoc p||eval_sv
2906 Tells Perl to C<eval> the string in the SV. It supports the same flags
2907 as C<call_sv>, with the obvious exception of C<G_EVAL>. See L<perlcall>.
2913 Perl_eval_sv(pTHX_ SV *sv, I32 flags)
2915 /* See G_* flags in cop.h */
2918 UNOP myop; /* fake syntax tree node */
2922 OP* const oldop = PL_op;
2925 PERL_ARGS_ASSERT_EVAL_SV;
2927 if (flags & G_DISCARD) {
2934 Zero(&myop, 1, UNOP);
2937 oldmark = SP - PL_stack_base;
2943 if (!(flags & G_NOARGS))
2944 myop.op_flags = OPf_STACKED;
2945 myop.op_type = OP_ENTEREVAL;
2946 myop.op_flags |= OP_GIMME_REVERSE(flags);
2947 if (flags & G_KEEPERR)
2948 myop.op_flags |= OPf_SPECIAL;
2950 if (flags & G_RE_REPARSING)
2951 myop.op_private = (OPpEVAL_COPHH | OPpEVAL_RE_REPARSING);
2953 /* fail now; otherwise we could fail after the JMPENV_PUSH but
2954 * before a cx_pusheval(), which corrupts the stack after a croak */
2955 TAINT_PROPER("eval_sv()");
2961 if (PL_op == (OP*)(&myop)) {
2962 PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX);
2964 goto fail; /* failed in compilation */
2967 retval = PL_stack_sp - (PL_stack_base + oldmark);
2968 if (!(flags & G_KEEPERR)) {
2976 /* my_exit() was called */
2977 SET_CURSTASH(PL_defstash);
2981 NOT_REACHED; /* NOTREACHED */
2984 PL_restartjmpenv = NULL;
2985 PL_op = PL_restartop;
2990 PL_stack_sp = PL_stack_base + oldmark;
2991 if ((flags & G_WANT) == G_ARRAY)
2995 *++PL_stack_sp = &PL_sv_undef;
3001 if (flags & G_DISCARD) {
3002 PL_stack_sp = PL_stack_base + oldmark;
3012 =for apidoc p||eval_pv
3014 Tells Perl to C<eval> the given string in scalar context and return an SV* result.
3020 Perl_eval_pv(pTHX_ const char *p, I32 croak_on_error)
3022 SV* sv = newSVpv(p, 0);
3024 PERL_ARGS_ASSERT_EVAL_PV;
3026 eval_sv(sv, G_SCALAR);
3035 /* just check empty string or undef? */
3036 if (croak_on_error) {
3037 SV * const errsv = ERRSV;
3038 if(SvTRUE_NN(errsv))
3039 /* replace with croak_sv? */
3040 Perl_croak_nocontext("%s", SvPV_nolen_const(errsv));
3046 /* Require a module. */
3049 =head1 Embedding Functions
3051 =for apidoc p||require_pv
3053 Tells Perl to C<require> the file named by the string argument. It is
3054 analogous to the Perl code C<eval "require '$file'">. It's even
3055 implemented that way; consider using load_module instead.
3060 Perl_require_pv(pTHX_ const char *pv)
3065 PERL_ARGS_ASSERT_REQUIRE_PV;
3067 PUSHSTACKi(PERLSI_REQUIRE);
3068 sv = Perl_newSVpvf(aTHX_ "require q%c%s%c", 0, pv, 0);
3069 eval_sv(sv_2mortal(sv), G_DISCARD);
3074 S_usage(pTHX) /* XXX move this out into a module ? */
3076 /* This message really ought to be max 23 lines.
3077 * Removed -h because the user already knows that option. Others? */
3079 /* Grouped as 6 lines per C string literal, to keep under the ANSI C 89
3080 minimum of 509 character string literals. */
3081 static const char * const usage_msg[] = {
3082 " -0[octal] specify record separator (\\0, if no argument)\n"
3083 " -a autosplit mode with -n or -p (splits $_ into @F)\n"
3084 " -C[number/list] enables the listed Unicode features\n"
3085 " -c check syntax only (runs BEGIN and CHECK blocks)\n"
3086 " -d[:debugger] run program under debugger\n"
3087 " -D[number/list] set debugging flags (argument is a bit mask or alphabets)\n",
3088 " -e program one line of program (several -e's allowed, omit programfile)\n"
3089 " -E program like -e, but enables all optional features\n"
3090 " -f don't do $sitelib/sitecustomize.pl at startup\n"
3091 " -F/pattern/ split() pattern for -a switch (//'s are optional)\n"
3092 " -i[extension] edit <> files in place (makes backup if extension supplied)\n"
3093 " -Idirectory specify @INC/#include directory (several -I's allowed)\n",
3094 " -l[octal] enable line ending processing, specifies line terminator\n"
3095 " -[mM][-]module execute \"use/no module...\" before executing program\n"
3096 " -n assume \"while (<>) { ... }\" loop around program\n"
3097 " -p assume loop like -n but print line also, like sed\n"
3098 " -s enable rudimentary parsing for switches after programfile\n"
3099 " -S look for programfile using PATH environment variable\n",
3100 " -t enable tainting warnings\n"
3101 " -T enable tainting checks\n"
3102 " -u dump core after parsing program\n"
3103 " -U allow unsafe operations\n"
3104 " -v print version, patchlevel and license\n"
3105 " -V[:variable] print configuration summary (or a single Config.pm variable)\n",
3106 " -w enable many useful warnings\n"
3107 " -W enable all warnings\n"
3108 " -x[directory] ignore text before #!perl line (optionally cd to directory)\n"
3109 " -X disable all warnings\n"
3111 "Run 'perldoc perl' for more help with Perl.\n\n",
3114 const char * const *p = usage_msg;
3115 PerlIO *out = PerlIO_stdout();
3118 "\nUsage: %s [switches] [--] [programfile] [arguments]\n",
3121 PerlIO_puts(out, *p++);
3125 /* convert a string of -D options (or digits) into an int.
3126 * sets *s to point to the char after the options */
3130 Perl_get_debug_opts(pTHX_ const char **s, bool givehelp)
3132 static const char * const usage_msgd[] = {
3133 " Debugging flag values: (see also -d)\n"
3134 " p Tokenizing and parsing (with v, displays parse stack)\n"
3135 " s Stack snapshots (with v, displays all stacks)\n"
3136 " l Context (loop) stack processing\n"
3137 " t Trace execution\n"
3138 " o Method and overloading resolution\n",
3139 " c String/numeric conversions\n"
3140 " P Print profiling info, source file input state\n"
3141 " m Memory and SV allocation\n"
3142 " f Format processing\n"
3143 " r Regular expression parsing and execution\n"
3144 " x Syntax tree dump\n",
3145 " u Tainting checks\n"
3146 " H Hash dump -- usurps values()\n"
3147 " X Scratchpad allocation\n"
3149 " S Op slab allocation\n"
3151 " R Include reference counts of dumped variables (eg when using -Ds)\n",
3152 " J Do not s,t,P-debug (Jump over) opcodes within package DB\n"
3153 " v Verbose: use in conjunction with other flags\n"
3154 " C Copy On Write\n"
3155 " A Consistency checks on internal structures\n"
3156 " q quiet - currently only suppresses the 'EXECUTING' message\n"
3157 " M trace smart match resolution\n"
3158 " B dump suBroutine definitions, including special Blocks like BEGIN\n",
3159 " L trace some locale setting information--for Perl core development\n",
3160 " i trace PerlIO layer processing\n",
3165 PERL_ARGS_ASSERT_GET_DEBUG_OPTS;
3168 /* if adding extra options, remember to update DEBUG_MASK */
3169 static const char debopts[] = "psltocPmfrxuUHXDSTRJvCAqMBLi";
3171 for (; isWORDCHAR(**s); (*s)++) {
3172 const char * const d = strchr(debopts,**s);
3174 uv |= 1 << (d - debopts);
3175 else if (ckWARN_d(WARN_DEBUGGING))
3176 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3177 "invalid option -D%c, use -D'' to see choices\n", **s);
3180 else if (isDIGIT(**s)) {
3182 if (grok_atoUV(*s, &uv, &e))
3184 for (; isWORDCHAR(**s); (*s)++) ;
3186 else if (givehelp) {
3187 const char *const *p = usage_msgd;
3188 while (*p) PerlIO_puts(PerlIO_stdout(), *p++);
3190 return (int)uv; /* ignore any UV->int conversion loss */
3194 /* This routine handles any switches that can be given during run */
3197 Perl_moreswitches(pTHX_ const char *s)
3201 const char option = *s; /* used to remember option in -m/-M code */
3203 PERL_ARGS_ASSERT_MORESWITCHES;
3211 SvREFCNT_dec(PL_rs);
3212 if (s[1] == 'x' && s[2]) {
3213 const char *e = s+=2;
3219 flags = PERL_SCAN_SILENT_ILLDIGIT;
3220 rschar = (U32)grok_hex(s, &numlen, &flags, NULL);
3221 if (s + numlen < e) {
3222 rschar = 0; /* Grandfather -0xFOO as -0 -xFOO. */
3226 PL_rs = newSVpvs("");
3227 tmps = (U8*) SvGROW(PL_rs, (STRLEN)(UVCHR_SKIP(rschar) + 1));
3228 uvchr_to_utf8(tmps, rschar);
3229 SvCUR_set(PL_rs, UVCHR_SKIP(rschar));
3234 rschar = (U32)grok_oct(s, &numlen, &flags, NULL);
3235 if (rschar & ~((U8)~0))
3236 PL_rs = &PL_sv_undef;
3237 else if (!rschar && numlen >= 2)
3238 PL_rs = newSVpvs("");
3240 char ch = (char)rschar;
3241 PL_rs = newSVpvn(&ch, 1);
3244 sv_setsv(get_sv("/", GV_ADD), PL_rs);
3249 PL_unicode = parse_unicode_opts( (const char **)&s );
3250 if (PL_unicode & PERL_UNICODE_UTF8CACHEASSERT_FLAG)
3258 while (*s && !isSPACE(*s)) ++s;
3259 PL_splitstr = savepvn(PL_splitstr, s - PL_splitstr);
3271 forbid_setid('d', FALSE);
3274 /* -dt indicates to the debugger that threads will be used */
3275 if (*s == 't' && !isWORDCHAR(s[1])) {
3277 my_setenv("PERL5DB_THREADED", "1");
3280 /* The following permits -d:Mod to accepts arguments following an =
3281 in the fashion that -MSome::Mod does. */
3282 if (*s == ':' || *s == '=') {
3289 sv = newSVpvs("no Devel::");
3291 sv = newSVpvs("use Devel::");
3295 end = s + strlen(s);
3297 /* We now allow -d:Module=Foo,Bar and -d:-Module */
3298 while(isWORDCHAR(*s) || *s==':') ++s;
3300 sv_catpvn(sv, start, end - start);
3302 sv_catpvn(sv, start, s-start);
3303 /* Don't use NUL as q// delimiter here, this string goes in the
3305 Perl_sv_catpvf(aTHX_ sv, " split(/,/,q{%s});", ++s);
3308 my_setenv("PERL5DB", SvPV_nolen_const(sv));
3312 PL_perldb = PERLDB_ALL;
3319 forbid_setid('D', FALSE);
3321 PL_debug = get_debug_opts( (const char **)&s, 1) | DEBUG_TOP_FLAG;
3322 #else /* !DEBUGGING */
3323 if (ckWARN_d(WARN_DEBUGGING))
3324 Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
3325 "Recompile perl with -DDEBUGGING to use -D switch (did you mean -d ?)\n");
3326 for (s++; isWORDCHAR(*s); s++) ;
3329 NOT_REACHED; /* NOTREACHED */
3333 NOT_REACHED; /* NOTREACHED */
3336 Safefree(PL_inplace);
3337 #if defined(__CYGWIN__) /* do backup extension automagically */
3338 if (*(s+1) == '\0') {
3339 PL_inplace = savepvs(".bak");
3342 #endif /* __CYGWIN__ */
3344 const char * const start = ++s;
3345 while (*s && !isSPACE(*s))
3348 PL_inplace = savepvn(start, s - start);
3351 case 'I': /* -I handled both here and in parse_body() */
3352 forbid_setid('I', FALSE);
3354 while (*s && isSPACE(*s))
3359 /* ignore trailing spaces (possibly followed by other switches) */
3361 for (e = p; *e && !isSPACE(*e); e++) ;
3365 } while (*p && *p != '-');
3367 INCPUSH_ADD_SUB_DIRS|INCPUSH_ADD_OLD_VERS|INCPUSH_UNSHIFT);
3373 Perl_croak(aTHX_ "No directory specified for -I");
3379 SvREFCNT_dec(PL_ors_sv);
3385 PL_ors_sv = newSVpvs("\n");
3386 numlen = 3 + (*s == '0');
3387 *SvPVX(PL_ors_sv) = (char)grok_oct(s, &numlen, &flags, NULL);
3391 if (RsPARA(PL_rs)) {
3392 PL_ors_sv = newSVpvs("\n\n");
3395 PL_ors_sv = newSVsv(PL_rs);
3400 forbid_setid('M', FALSE); /* XXX ? */
3403 forbid_setid('m', FALSE); /* XXX ? */
3408 const char *use = "use ";
3410 /* -M-foo == 'no foo' */
3411 /* Leading space on " no " is deliberate, to make both
3412 possibilities the same length. */
3413 if (*s == '-') { use = " no "; ++s; }
3414 sv = newSVpvn(use,4);
3416 /* We allow -M'Module qw(Foo Bar)' */
3417 while(isWORDCHAR(*s) || *s==':') {
3426 Perl_croak(aTHX_ "Module name required with -%c option",
3429 Perl_croak(aTHX_ "Invalid module name %.*s with -%c option: "
3430 "contains single ':'",
3431 (int)(s - start), start, option);
3432 end = s + strlen(s);
3434 sv_catpvn(sv, start, end - start);
3435 if (option == 'm') {
3437 Perl_croak(aTHX_ "Can't use '%c' after -mname", *s);
3438 sv_catpvs( sv, " ()");
3441 sv_catpvn(sv, start, s-start);
3442 /* Use NUL as q''-delimiter. */
3443 sv_catpvs(sv, " split(/,/,q\0");
3445 sv_catpvn(sv, s, end - s);
3446 sv_catpvs(sv, "\0)");
3449 Perl_av_create_and_push(aTHX_ &PL_preambleav, sv);
3452 Perl_croak(aTHX_ "Missing argument to -%c", option);
3463 forbid_setid('s', FALSE);
3464 PL_doswitches = TRUE;
3469 #if defined(SILENT_NO_TAINT_SUPPORT)
3470 /* silently ignore */
3471 #elif defined(NO_TAINT_SUPPORT)
3472 Perl_croak_nocontext("This perl was compiled without taint support. "
3473 "Cowardly refusing to run with -t or -T flags");
3481 PL_do_undump = TRUE;
3491 if (! (PL_dowarn & G_WARN_ALL_MASK)) {
3492 PL_dowarn |= G_WARN_ON;
3497 PL_dowarn = G_WARN_ALL_ON|G_WARN_ON;
3498 if (!specialWARN(PL_compiling.cop_warnings))
3499 PerlMemShared_free(PL_compiling.cop_warnings);
3500 PL_compiling.cop_warnings = pWARN_ALL ;
3504 PL_dowarn = G_WARN_ALL_OFF;
3505 if (!specialWARN(PL_compiling.cop_warnings))
3506 PerlMemShared_free(PL_compiling.cop_warnings);
3507 PL_compiling.cop_warnings = pWARN_NONE ;
3514 if (s[0] == '-') /* Additional switches on #! line. */
3519 #if defined(WIN32) || !defined(PERL_STRICT_CR)
3525 #ifdef ALTERNATE_SHEBANG
3526 case 'S': /* OS/2 needs -S on "extproc" line. */
3529 case 'e': case 'f': case 'x': case 'E':
3530 #ifndef ALTERNATE_SHEBANG
3534 Perl_croak(aTHX_ "Can't emulate -%.1s on #! line",s);
3537 "Unrecognized switch: -%.1s (-h will show valid options)",s
3547 PerlIO * PIO_stdout;
3549 const char * const level_str = "v" PERL_VERSION_STRING;
3550 const STRLEN level_len = sizeof("v" PERL_VERSION_STRING)-1;
3551 #ifdef PERL_PATCHNUM
3553 # ifdef PERL_GIT_UNCOMMITTED_CHANGES
3554 static const char num [] = PERL_PATCHNUM "*";
3556 static const char num [] = PERL_PATCHNUM;
3559 const STRLEN num_len = sizeof(num)-1;
3560 /* A very advanced compiler would fold away the strnEQ
3561 and this whole conditional, but most (all?) won't do it.
3562 SV level could also be replaced by with preprocessor
3565 if (num_len >= level_len && strnEQ(num,level_str,level_len)) {
3566 /* per 46807d8e80, PERL_PATCHNUM is outside of the control
3567 of the interp so it might contain format characters
3569 level = newSVpvn(num, num_len);
3571 level = Perl_newSVpvf_nocontext("%s (%s)", level_str, num);
3575 SV* level = newSVpvn(level_str, level_len);
3576 #endif /* #ifdef PERL_PATCHNUM */
3577 PIO_stdout = PerlIO_stdout();
3578 PerlIO_printf(PIO_stdout,
3579 "\nThis is perl " STRINGIFY(PERL_REVISION)
3580 ", version " STRINGIFY(PERL_VERSION)
3581 ", subversion " STRINGIFY(PERL_SUBVERSION)
3582 " (%" SVf ") built for " ARCHNAME, SVfARG(level)
3584 SvREFCNT_dec_NN(level);
3586 #if defined(LOCAL_PATCH_COUNT)
3587 if (LOCAL_PATCH_COUNT > 0)
3588 PerlIO_printf(PIO_stdout,
3589 "\n(with %d registered patch%s, "
3590 "see perl -V for more detail)",
3592 (LOCAL_PATCH_COUNT!=1) ? "es" : "");
3595 PerlIO_printf(PIO_stdout,
3596 "\n\nCopyright 1987-2017, Larry Wall\n");
3598 PerlIO_printf(PIO_stdout,
3599 "\nMS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
3602 PerlIO_printf(PIO_stdout,
3603 "djgpp v2 port (jpl5003c) by Hirofumi Watanabe, 1996\n"
3604 "djgpp v2 port (perl5004+) by Laszlo Molnar, 1997-1999\n");
3607 PerlIO_printf(PIO_stdout,
3608 "\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
3609 "Version 5 port Copyright (c) 1994-2002, Andreas Kaiser, Ilya Zakharevich\n");
3612 PerlIO_printf(PIO_stdout,
3613 "MVS (OS390) port by Mortice Kern Systems, 1997-1999\n");
3616 PerlIO_printf(PIO_stdout,
3617 "Stratus OpenVOS port by Paul.Green@stratus.com, 1997-2013\n");
3620 PerlIO_printf(PIO_stdout,
3621 "BS2000 (POSIX) port by Start Amadeus GmbH, 1998-1999\n");
3624 PerlIO_printf(PIO_stdout,
3625 "WINCE port by Rainer Keuchel, 2001-2002\n"
3626 "Built on " __DATE__ " " __TIME__ "\n\n");
3629 #ifdef __SYMBIAN32__
3630 PerlIO_printf(PIO_stdout,
3631 "Symbian port by Nokia, 2004-2005\n");
3633 #ifdef BINARY_BUILD_NOTICE
3634 BINARY_BUILD_NOTICE;
3636 PerlIO_printf(PIO_stdout,
3638 Perl may be copied only under the terms of either the Artistic License or the\n\
3639 GNU General Public License, which may be found in the Perl 5 source kit.\n\n\
3640 Complete documentation for Perl, including FAQ lists, should be found on\n\
3641 this system using \"man perl\" or \"perldoc perl\". If you have access to the\n\
3642 Internet, point your browser at http://www.perl.org/, the Perl Home Page.\n\n");
3646 /* compliments of Tom Christiansen */
3648 /* unexec() can be found in the Gnu emacs distribution */
3649 /* Known to work with -DUNEXEC and using unexelf.c from GNU emacs-20.2 */
3652 #include <lib$routines.h>
3656 Perl_my_unexec(pTHX)
3659 SV * prog = newSVpv(BIN_EXP, 0);
3660 SV * file = newSVpv(PL_origfilename, 0);
3664 sv_catpvs(prog, "/perl");
3665 sv_catpvs(file, ".perldump");
3667 unexec(SvPVX(file), SvPVX(prog), &etext, sbrk(0), 0);
3668 /* unexec prints msg to stderr in case of failure */
3669 PerlProc_exit(status);
3671 PERL_UNUSED_CONTEXT;
3673 lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
3674 # elif defined(WIN32) || defined(__CYGWIN__)
3675 Perl_croak_nocontext("dump is not supported");
3677 ABORT(); /* for use with undump */
3682 /* initialize curinterp */
3687 # define PERLVAR(prefix,var,type)
3688 # define PERLVARA(prefix,var,n,type)
3689 # if defined(PERL_IMPLICIT_CONTEXT)
3690 # define PERLVARI(prefix,var,type,init) aTHX->prefix##var = init;
3691 # define PERLVARIC(prefix,var,type,init) aTHX->prefix##var = init;
3693 # define PERLVARI(prefix,var,type,init) PERL_GET_INTERP->var = init;
3694 # define PERLVARIC(prefix,var,type,init) PERL_GET_INTERP->var = init;
3696 # include "intrpvar.h"
3702 # define PERLVAR(prefix,var,type)
3703 # define PERLVARA(prefix,var,n,type)
3704 # define PERLVARI(prefix,var,type,init) PL_##var = init;
3705 # define PERLVARIC(prefix,var,type,init) PL_##var = init;
3706 # include "intrpvar.h"
3716 S_init_main_stash(pTHX)
3720 PL_curstash = PL_defstash = (HV *)SvREFCNT_inc_simple_NN(newHV());
3721 /* We know that the string "main" will be in the global shared string
3722 table, so it's a small saving to use it rather than allocate another
3724 PL_curstname = newSVpvs_share("main");
3725 gv = gv_fetchpvs("main::", GV_ADD|GV_NOTQUAL, SVt_PVHV);
3726 /* If we hadn't caused another reference to "main" to be in the shared
3727 string table above, then it would be worth reordering these two,
3728 because otherwise all we do is delete "main" from it as a consequence
3729 of the SvREFCNT_dec, only to add it again with hv_name_set */
3730 SvREFCNT_dec(GvHV(gv));
3731 hv_name_sets(PL_defstash, "main", 0);
3732 GvHV(gv) = MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash));
3734 PL_incgv = gv_HVadd(gv_AVadd(gv_fetchpvs("INC", GV_ADD|GV_NOTQUAL,
3736 SvREFCNT_inc_simple_void(PL_incgv); /* Don't allow it to be freed */
3737 GvMULTI_on(PL_incgv);
3738 PL_hintgv = gv_fetchpvs("\010", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^H */
3739 SvREFCNT_inc_simple_void(PL_hintgv);
3740 GvMULTI_on(PL_hintgv);
3741 PL_defgv = gv_fetchpvs("_", GV_ADD|GV_NOTQUAL, SVt_PVAV);
3742 SvREFCNT_inc_simple_void(PL_defgv);
3743 PL_errgv = gv_fetchpvs("@", GV_ADD|GV_NOTQUAL, SVt_PV);
3744 SvREFCNT_inc_simple_void(PL_errgv);
3745 GvMULTI_on(PL_errgv);
3746 PL_replgv = gv_fetchpvs("\022", GV_ADD|GV_NOTQUAL, SVt_PV); /* ^R */
3747 SvREFCNT_inc_simple_void(PL_replgv);
3748 GvMULTI_on(PL_replgv);
3749 (void)Perl_form(aTHX_ "%240s",""); /* Preallocate temp - for immediate signals. */
3750 #ifdef PERL_DONT_CREATE_GVSV
3751 (void)gv_SVadd(PL_errgv);
3753 sv_grow(ERRSV, 240); /* Preallocate - for immediate signals. */
3755 SET_CURSTASH(PL_defstash);
3756 CopSTASH_set(&PL_compiling, PL_defstash);
3757 PL_debstash = GvHV(gv_fetchpvs("DB::", GV_ADDMULTI, SVt_PVHV));
3758 PL_globalstash = GvHV(gv_fetchpvs("CORE::GLOBAL::", GV_ADDMULTI,
3760 /* We must init $/ before switches are processed. */
3761 sv_setpvs(get_sv("/", GV_ADD), "\n");
3765 S_open_script(pTHX_ const char *scriptname, bool dosearch, bool *suidscript)
3768 PerlIO *rsfp = NULL;
3772 PERL_ARGS_ASSERT_OPEN_SCRIPT;
3775 PL_origfilename = savepvs("-e");
3780 /* if find_script() returns, it returns a malloc()-ed value */
3781 scriptname = PL_origfilename = find_script(scriptname, dosearch, NULL, 1);
3783 if (strEQs(scriptname, "/dev/fd/")
3784 && isDIGIT(scriptname[8])
3785 && grok_atoUV(scriptname + 8, &uv, &s)
3786 && uv <= PERL_INT_MAX
3791 * Tell apart "normal" usage of fdscript, e.g.
3792 * with bash on FreeBSD:
3793 * perl <( echo '#!perl -DA'; echo 'print "$0\n"')
3794 * from usage in suidperl.
3795 * Does any "normal" usage leave garbage after the number???
3796 * Is it a mistake to use a similar /dev/fd/ construct for
3801 * Be supersafe and do some sanity-checks.
3802 * Still, can we be sure we got the right thing?
3805 Perl_croak(aTHX_ "Wrong syntax (suid) fd script name \"%s\"\n", s);
3808 Perl_croak(aTHX_ "Missing (suid) fd script name\n");
3810 scriptname = savepv(s + 1);
3811 Safefree(PL_origfilename);
3812 PL_origfilename = (char *)scriptname;
3817 CopFILE_free(PL_curcop);
3818 CopFILE_set(PL_curcop, PL_origfilename);
3819 if (*PL_origfilename == '-' && PL_origfilename[1] == '\0')
3820 scriptname = (char *)"";
3821 if (fdscript >= 0) {
3822 rsfp = PerlIO_fdopen(fdscript,PERL_SCRIPT_MODE);
3824 else if (!*scriptname) {
3825 forbid_setid(0, *suidscript);
3829 #ifdef FAKE_BIT_BUCKET
3830 /* This hack allows one not to have /dev/null (or BIT_BUCKET as it
3831 * is called) and still have the "-e" work. (Believe it or not,
3832 * a /dev/null is required for the "-e" to work because source
3833 * filter magic is used to implement it. ) This is *not* a general
3834 * replacement for a /dev/null. What we do here is create a temp
3835 * file (an empty file), open up that as the script, and then
3836 * immediately close and unlink it. Close enough for jazz. */
3837 #define FAKE_BIT_BUCKET_PREFIX "/tmp/perlnull-"
3838 #define FAKE_BIT_BUCKET_SUFFIX "XXXXXXXX"
3839 #define FAKE_BIT_BUCKET_TEMPLATE FAKE_BIT_BUCKET_PREFIX FAKE_BIT_BUCKET_SUFFIX
3840 char tmpname[sizeof(FAKE_BIT_BUCKET_TEMPLATE)] = {
3841 FAKE_BIT_BUCKET_TEMPLATE
3843 const char * const err = "Failed to create a fake bit bucket";
3844 if (strEQ(scriptname, BIT_BUCKET)) {
3845 #ifdef HAS_MKSTEMP /* Hopefully mkstemp() is safe here. */
3846 int old_umask = umask(0177);
3847 int tmpfd = mkstemp(tmpname);
3850 scriptname = tmpname;
3853 Perl_croak(aTHX_ err);
3856 scriptname = mktemp(tmpname);
3858 Perl_croak(aTHX_ err);
3863 rsfp = PerlIO_open(scriptname,PERL_SCRIPT_MODE);
3864 #ifdef FAKE_BIT_BUCKET
3865 if (memEQ(scriptname, FAKE_BIT_BUCKET_PREFIX,
3866 sizeof(FAKE_BIT_BUCKET_PREFIX) - 1)
3867 && strlen(scriptname) == sizeof(tmpname) - 1) {
3870 scriptname = BIT_BUCKET;
3874 /* PSz 16 Sep 03 Keep neat error message */
3876 Perl_croak(aTHX_ "Can't open " BIT_BUCKET ": %s\n", Strerror(errno));
3878 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3879 CopFILE(PL_curcop), Strerror(errno));
3881 fd = PerlIO_fileno(rsfp);
3882 #if defined(HAS_FCNTL) && defined(F_SETFD) && defined(FD_CLOEXEC)
3884 /* ensure close-on-exec */
3885 if (fcntl(fd, F_SETFD, FD_CLOEXEC) < 0) {
3886 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3887 CopFILE(PL_curcop), Strerror(errno));
3893 (PerlLIO_fstat(fd, &tmpstatbuf) >= 0
3894 && S_ISDIR(tmpstatbuf.st_mode)))
3895 Perl_croak(aTHX_ "Can't open perl script \"%s\": %s\n",
3903 * I_SYSSTATVFS HAS_FSTATVFS
3905 * I_STATFS HAS_FSTATFS HAS_GETFSSTAT
3906 * I_MNTENT HAS_GETMNTENT HAS_HASMNTOPT
3907 * here so that metaconfig picks them up. */
3910 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
3911 /* Don't even need this function. */
3914 S_validate_suid(pTHX_ PerlIO *rsfp)
3916 const Uid_t my_uid = PerlProc_getuid();
3917 const Uid_t my_euid = PerlProc_geteuid();
3918 const Gid_t my_gid = PerlProc_getgid();
3919 const Gid_t my_egid = PerlProc_getegid();
3921 PERL_ARGS_ASSERT_VALIDATE_SUID;
3923 if (my_euid != my_uid || my_egid != my_gid) { /* (suidperl doesn't exist, in fact) */
3925 int fd = PerlIO_fileno(rsfp);
3927 if (fd < 0 || PerlLIO_fstat(fd, &statbuf) < 0) { /* may be either wrapped or real suid */
3928 Perl_croak_nocontext( "Illegal suidscript");
3930 if ((my_euid != my_uid && my_euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
3932 (my_egid != my_gid && my_egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
3935 Perl_croak(aTHX_ "YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
3936 FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
3937 /* not set-id, must be wrapped */
3940 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
3943 S_find_beginning(pTHX_ SV* linestr_sv, PerlIO *rsfp)
3948 PERL_ARGS_ASSERT_FIND_BEGINNING;
3950 /* skip forward in input to the real script? */
3953 if ((s = sv_gets(linestr_sv, rsfp, 0)) == NULL)
3954 Perl_croak(aTHX_ "No Perl script found in input\n");
3956 } while (!(*s == '#' && s[1] == '!' && ((s = instr(s,"perl")) || (s = instr(s2,"PERL")))));
3957 PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
3958 while (*s && !(isSPACE (*s) || *s == '#')) s++;
3960 while (*s == ' ' || *s == '\t') s++;
3962 while (isDIGIT(s2[-1]) || s2[-1] == '-' || s2[-1] == '.'
3963 || s2[-1] == '_') s2--;
3964 if (strEQs(s2-4,"perl"))
3965 while ((s = moreswitches(s)))
3974 /* no need to do anything here any more if we don't
3976 #ifndef NO_TAINT_SUPPORT
3977 const Uid_t my_uid = PerlProc_getuid();
3978 const Uid_t my_euid = PerlProc_geteuid();
3979 const Gid_t my_gid = PerlProc_getgid();
3980 const Gid_t my_egid = PerlProc_getegid();
3982 PERL_UNUSED_CONTEXT;
3984 /* Should not happen: */
3985 CHECK_MALLOC_TAINT(my_uid && (my_euid != my_uid || my_egid != my_gid));
3986 TAINTING_set( TAINTING_get | (my_uid && (my_euid != my_uid || my_egid != my_gid)) );
3990 * Should go by suidscript, not uid!=euid: why disallow
3991 * system("ls") in scripts run from setuid things?
3992 * Or, is this run before we check arguments and set suidscript?
3993 * What about SETUID_SCRIPTS_ARE_SECURE_NOW: could we use fdscript then?
3994 * (We never have suidscript, can we be sure to have fdscript?)
3995 * Or must then go by UID checks? See comments in forbid_setid also.
3999 /* This is used very early in the lifetime of the program,
4000 * before even the options are parsed, so PL_tainting has
4001 * not been initialized properly. */
4003 Perl_doing_taint(int argc, char *argv[], char *envp[])
4005 #ifndef PERL_IMPLICIT_SYS
4006 /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
4007 * before we have an interpreter-- and the whole point of this
4008 * function is to be called at such an early stage. If you are on
4009 * a system with PERL_IMPLICIT_SYS but you do have a concept of
4010 * "tainted because running with altered effective ids', you'll
4011 * have to add your own checks somewhere in here. The two most
4012 * known samples of 'implicitness' are Win32 and NetWare, neither
4013 * of which has much of concept of 'uids'. */
4014 Uid_t uid = PerlProc_getuid();
4015 Uid_t euid = PerlProc_geteuid();
4016 Gid_t gid = PerlProc_getgid();
4017 Gid_t egid = PerlProc_getegid();
4024 if (uid && (euid != uid || egid != gid))
4026 #endif /* !PERL_IMPLICIT_SYS */
4027 /* This is a really primitive check; environment gets ignored only
4028 * if -T are the first chars together; otherwise one gets
4029 * "Too late" message. */
4030 if ( argc > 1 && argv[1][0] == '-'
4031 && isALPHA_FOLD_EQ(argv[1][1], 't'))
4036 /* Passing the flag as a single char rather than a string is a slight space
4037 optimisation. The only message that isn't /^-.$/ is
4038 "program input from stdin", which is substituted in place of '\0', which
4039 could never be a command line flag. */
4041 S_forbid_setid(pTHX_ const char flag, const bool suidscript) /* g */
4043 char string[3] = "-x";
4044 const char *message = "program input from stdin";
4046 PERL_UNUSED_CONTEXT;
4052 #ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
4053 if (PerlProc_getuid() != PerlProc_geteuid())
4054 Perl_croak(aTHX_ "No %s allowed while running setuid", message);
4055 if (PerlProc_getgid() != PerlProc_getegid())
4056 Perl_croak(aTHX_ "No %s allowed while running setgid", message);
4057 #endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
4059 Perl_croak(aTHX_ "No %s allowed with (suid) fdscript", message);
4063 Perl_init_dbargs(pTHX)
4065 AV *const args = PL_dbargs = GvAV(gv_AVadd((gv_fetchpvs("DB::args",
4070 /* Someone has already created it.
4071 It might have entries, and if we just turn off AvREAL(), they will
4072 "leak" until global destruction. */
4074 if (SvTIED_mg((const SV *)args, PERL_MAGIC_tied))
4075 Perl_croak(aTHX_ "Cannot set tied @DB::args");
4077 AvREIFY_only(PL_dbargs);
4081 Perl_init_debugger(pTHX)
4083 HV * const ostash = PL_curstash;
4086 PL_curstash = (HV *)SvREFCNT_inc_simple(PL_debstash);
4088 Perl_init_dbargs(aTHX);
4089 PL_DBgv = MUTABLE_GV(
4090 SvREFCNT_inc(gv_fetchpvs("DB::DB", GV_ADDMULTI, SVt_PVGV))
4092 PL_DBline = MUTABLE_GV(
4093 SvREFCNT_inc(gv_fetchpvs("DB::dbline", GV_ADDMULTI, SVt_PVAV))
4095 PL_DBsub = MUTABLE_GV(SvREFCNT_inc(
4096 gv_HVadd(gv_fetchpvs("DB::sub", GV_ADDMULTI, SVt_PVHV))
4098 PL_DBsingle = GvSV((gv_fetchpvs("DB::single", GV_ADDMULTI, SVt_PV)));
4099 if (!SvIOK(PL_DBsingle))
4100 sv_setiv(PL_DBsingle, 0);
4101 mg = sv_magicext(PL_DBsingle, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4102 mg->mg_private = DBVARMG_SINGLE;
4103 SvSETMAGIC(PL_DBsingle);
4105 PL_DBtrace = GvSV((gv_fetchpvs("DB::trace", GV_ADDMULTI, SVt_PV)));
4106 if (!SvIOK(PL_DBtrace))
4107 sv_setiv(PL_DBtrace, 0);
4108 mg = sv_magicext(PL_DBtrace, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4109 mg->mg_private = DBVARMG_TRACE;
4110 SvSETMAGIC(PL_DBtrace);
4112 PL_DBsignal = GvSV((gv_fetchpvs("DB::signal", GV_ADDMULTI, SVt_PV)));
4113 if (!SvIOK(PL_DBsignal))
4114 sv_setiv(PL_DBsignal, 0);
4115 mg = sv_magicext(PL_DBsignal, NULL, PERL_MAGIC_debugvar, &PL_vtbl_debugvar, 0, 0);
4116 mg->mg_private = DBVARMG_SIGNAL;
4117 SvSETMAGIC(PL_DBsignal);
4119 SvREFCNT_dec(PL_curstash);
4120 PL_curstash = ostash;
4123 #ifndef STRESS_REALLOC
4124 #define REASONABLE(size) (size)
4125 #define REASONABLE_but_at_least(size,min) (size)
4127 #define REASONABLE(size) (1) /* unreasonable */
4128 #define REASONABLE_but_at_least(size,min) (min)
4132 Perl_init_stacks(pTHX)
4136 /* start with 128-item stack and 8K cxstack */
4137 PL_curstackinfo = new_stackinfo(REASONABLE(128),
4138 REASONABLE(8192/sizeof(PERL_CONTEXT) - 1));
4139 PL_curstackinfo->si_type = PERLSI_MAIN;
4140 PL_curstack = PL_curstackinfo->si_stack;
4141 PL_mainstack = PL_curstack; /* remember in case we switch stacks */
4143 PL_stack_base = AvARRAY(PL_curstack);
4144 PL_stack_sp = PL_stack_base;
4145 PL_stack_max = PL_stack_base + AvMAX(PL_curstack);
4147 Newx(PL_tmps_stack,REASONABLE(128),SV*);
4150 PL_tmps_max = REASONABLE(128);
4152 Newx(PL_markstack,REASONABLE(32),I32);
4153 PL_markstack_ptr = PL_markstack;
4154 PL_markstack_max = PL_markstack + REASONABLE(32);
4158 Newx(PL_scopestack,REASONABLE(32),I32);
4160 Newx(PL_scopestack_name,REASONABLE(32),const char*);
4162 PL_scopestack_ix = 0;
4163 PL_scopestack_max = REASONABLE(32);
4165 size = REASONABLE_but_at_least(128,SS_MAXPUSH);
4166 Newx(PL_savestack, size, ANY);
4167 PL_savestack_ix = 0;
4168 /*PL_savestack_max lies: it always has SS_MAXPUSH more than it claims */
4169 PL_savestack_max = size - SS_MAXPUSH;
4177 while (PL_curstackinfo->si_next)
4178 PL_curstackinfo = PL_curstackinfo->si_next;
4179 while (PL_curstackinfo) {
4180 PERL_SI *p = PL_curstackinfo->si_prev;
4181 /* curstackinfo->si_stack got nuked by sv_free_arenas() */
4182 Safefree(PL_curstackinfo->si_cxstack);
4183 Safefree(PL_curstackinfo);
4184 PL_curstackinfo = p;
4186 Safefree(PL_tmps_stack);
4187 Safefree(PL_markstack);
4188 Safefree(PL_scopestack);
4190 Safefree(PL_scopestack_name);
4192 Safefree(PL_savestack);
4196 Perl_populate_isa(pTHX_ const char *name, STRLEN len, ...)
4198 GV *const gv = gv_fetchpvn(name, len, GV_ADD | GV_ADDMULTI, SVt_PVAV);
4199 AV *const isa = GvAVn(gv);
4202 PERL_ARGS_ASSERT_POPULATE_ISA;
4204 if(AvFILLp(isa) != -1)
4207 /* NOTE: No support for tied ISA */
4209 va_start(args, len);
4211 const char *const parent = va_arg(args, const char*);
4216 parent_len = va_arg(args, size_t);
4218 /* Arguments are supplied with a trailing :: */
4219 assert(parent_len > 2);
4220 assert(parent[parent_len - 1] == ':');
4221 assert(parent[parent_len - 2] == ':');
4222 av_push(isa, newSVpvn(parent, parent_len - 2));
4223 (void) gv_fetchpvn(parent, parent_len, GV_ADD, SVt_PVGV);
4230 S_init_predump_symbols(pTHX)
4235 sv_setpvs(get_sv("\"", GV_ADD), " ");
4236 PL_ofsgv = (GV*)SvREFCNT_inc(gv_fetchpvs(",", GV_ADD|GV_NOTQUAL, SVt_PV));
4239 /* Historically, PVIOs were blessed into IO::Handle, unless
4240 FileHandle was loaded, in which case they were blessed into
4241 that. Action at a distance.
4242 However, if we simply bless into IO::Handle, we break code
4243 that assumes that PVIOs will have (among others) a seek
4244 method. IO::File inherits from IO::Handle and IO::Seekable,
4245 and provides the needed methods. But if we simply bless into
4246 it, then we break code that assumed that by loading
4247 IO::Handle, *it* would work.
4248 So a compromise is to set up the correct @IO::File::ISA,
4249 so that code that does C<use IO::Handle>; will still work.
4252 Perl_populate_isa(aTHX_ STR_WITH_LEN("IO::File::ISA"),
4253 STR_WITH_LEN("IO::Handle::"),
4254 STR_WITH_LEN("IO::Seekable::"),
4255 STR_WITH_LEN("Exporter::"),
4258 PL_stdingv = gv_fetchpvs("STDIN", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4259 GvMULTI_on(PL_stdingv);
4260 io = GvIOp(PL_stdingv);
4261 IoTYPE(io) = IoTYPE_RDONLY;
4262 IoIFP(io) = PerlIO_stdin();
4263 tmpgv = gv_fetchpvs("stdin", GV_ADD|GV_NOTQUAL, SVt_PV);
4265 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4267 tmpgv = gv_fetchpvs("STDOUT", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4270 IoTYPE(io) = IoTYPE_WRONLY;
4271 IoOFP(io) = IoIFP(io) = PerlIO_stdout();
4273 tmpgv = gv_fetchpvs("stdout", GV_ADD|GV_NOTQUAL, SVt_PV);
4275 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4277 PL_stderrgv = gv_fetchpvs("STDERR", GV_ADD|GV_NOTQUAL, SVt_PVIO);
4278 GvMULTI_on(PL_stderrgv);
4279 io = GvIOp(PL_stderrgv);
4280 IoTYPE(io) = IoTYPE_WRONLY;
4281 IoOFP(io) = IoIFP(io) = PerlIO_stderr();
4282 tmpgv = gv_fetchpvs("stderr", GV_ADD|GV_NOTQUAL, SVt_PV);
4284 GvIOp(tmpgv) = MUTABLE_IO(SvREFCNT_inc_simple(io));
4286 PL_statname = newSVpvs(""); /* last filename we did stat on */
4290 Perl_init_argv_symbols(pTHX_ int argc, char **argv)
4292 PERL_ARGS_ASSERT_INIT_ARGV_SYMBOLS;
4294 argc--,argv++; /* skip name of script */
4295 if (PL_doswitches) {
4296 for (; argc > 0 && **argv == '-'; argc--,argv++) {
4300 if (argv[0][1] == '-' && !argv[0][2]) {
4304 if ((s = strchr(argv[0], '='))) {
4305 const char *const start_name = argv[0] + 1;
4306 sv_setpv(GvSV(gv_fetchpvn_flags(start_name, s - start_name,
4307 TRUE, SVt_PV)), s + 1);
4310 sv_setiv(GvSV(gv_fetchpv(argv[0]+1, GV_ADD, SVt_PV)),1);
4313 if ((PL_argvgv = gv_fetchpvs("ARGV", GV_ADD|GV_NOTQUAL, SVt_PVAV))) {
4314 SvREFCNT_inc_simple_void_NN(PL_argvgv);
4315 GvMULTI_on(PL_argvgv);
4316 av_clear(GvAVn(PL_argvgv));
4317 for (; argc > 0; argc--,argv++) {
4318 SV * const sv = newSVpv(argv[0],0);
4319 av_push(GvAV(PL_argvgv),sv);
4320 if (!(PL_unicode & PERL_UNICODE_LOCALE_FLAG) || PL_utf8locale) {
4321 if (PL_unicode & PERL_UNICODE_ARGV_FLAG)
4324 if (PL_unicode & PERL_UNICODE_WIDESYSCALLS_FLAG) /* Sarathy? */
4325 (void)sv_utf8_decode(sv);
4329 if (PL_inplace && (!PL_argvgv || AvFILL(GvAV(PL_argvgv)) == -1))
4330 Perl_ck_warner_d(aTHX_ packWARN(WARN_INPLACE),
4331 "-i used with no filenames on the command line, "
4332 "reading from STDIN");
4336 S_init_postdump_symbols(pTHX_ int argc, char **argv, char **env)
4343 PERL_ARGS_ASSERT_INIT_POSTDUMP_SYMBOLS;
4345 PL_toptarget = newSV_type(SVt_PVIV);
4346 SvPVCLEAR(PL_toptarget);
4347 PL_bodytarget = newSV_type(SVt_PVIV);
4348 SvPVCLEAR(PL_bodytarget);
4349 PL_formtarget = PL_bodytarget;
4353 init_argv_symbols(argc,argv);
4355 if ((tmpgv = gv_fetchpvs("0", GV_ADD|GV_NOTQUAL, SVt_PV))) {
4356 sv_setpv(GvSV(tmpgv),PL_origfilename);
4358 if ((PL_envgv = gv_fetchpvs("ENV", GV_ADD|GV_NOTQUAL, SVt_PVHV))) {
4360 bool env_is_not_environ;
4361 SvREFCNT_inc_simple_void_NN(PL_envgv);
4362 GvMULTI_on(PL_envgv);
4363 hv = GvHVn(PL_envgv);
4364 hv_magic(hv, NULL, PERL_MAGIC_env);
4366 #ifdef USE_ENVIRON_ARRAY
4367 /* Note that if the supplied env parameter is actually a copy
4368 of the global environ then it may now point to free'd memory
4369 if the environment has been modified since. To avoid this
4370 problem we treat env==NULL as meaning 'use the default'
4374 env_is_not_environ = env != environ;
4375 if (env_is_not_environ
4376 # ifdef USE_ITHREADS
4377 && PL_curinterp == aTHX
4389 for (; *env; env++) {
4392 if (!(s = strchr(old_var,'=')) || s == old_var)
4396 #if defined(MSDOS) && !defined(DJGPP)
4398 (void)strupr(old_var);
4401 if (hv_exists(hv, old_var, nlen)) {
4402 const char *name = savepvn(old_var, nlen);
4404 /* make sure we use the same value as getenv(), otherwise code that
4405 uses getenv() (like setlocale()) might see a different value to %ENV
4407 sv = newSVpv(PerlEnv_getenv(name), 0);
4409 /* keep a count of the dups of this name so we can de-dup environ later */
4410 if (hv_exists(dups, name, nlen))
4411 ++SvIVX(*hv_fetch(dups, name, nlen, 0));
4413 (void)hv_store(dups, name, nlen, newSViv(1), 0);
4418 sv = newSVpv(s+1, 0);
4420 (void)hv_store(hv, old_var, nlen, sv, 0);
4421 if (env_is_not_environ)
4425 /* environ has some duplicate definitions, remove them */
4428 while ((entry = hv_iternext_flags(dups, 0))) {
4430 const char *name = HePV(entry, nlen);
4431 IV count = SvIV(HeVAL(entry));
4433 SV **valp = hv_fetch(hv, name, nlen, 0);
4437 /* try to remove any duplicate names, depending on the
4438 * implementation used in my_setenv() the iteration might
4439 * not be necessary, but let's be safe.
4441 for (i = 0; i < count; ++i)
4444 /* and set it back to the value we set $ENV{name} to */
4445 my_setenv(name, SvPV_nolen(*valp));
4448 SvREFCNT_dec_NN(dups);
4450 #endif /* USE_ENVIRON_ARRAY */
4451 #endif /* !PERL_MICRO */
4455 /* touch @F array to prevent spurious warnings 20020415 MJD */
4457 (void) get_av("main::F", GV_ADD | GV_ADDMULTI);
4462 S_init_perllib(pTHX)
4465 const char *perl5lib = NULL;
4468 #if defined(WIN32) && !defined(PERL_IS_MINIPERL)
4472 if (!TAINTING_get) {
4474 perl5lib = PerlEnv_getenv("PERL5LIB");
4476 * It isn't possible to delete an environment variable with
4477 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4478 * case we treat PERL5LIB as undefined if it has a zero-length value.
4480 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4481 if (perl5lib && *perl5lib != '\0')
4485 incpush_use_sep(perl5lib, 0, INCPUSH_ADD_SUB_DIRS);
4487 s = PerlEnv_getenv("PERLLIB");
4489 incpush_use_sep(s, 0, 0);
4492 /* Treat PERL5?LIB as a possible search list logical name -- the
4493 * "natural" VMS idiom for a Unix path string. We allow each
4494 * element to be a set of |-separated directories for compatibility.
4498 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4500 incpush_use_sep(buf, 0, INCPUSH_ADD_SUB_DIRS);
4501 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4503 while (vmstrnenv("PERLLIB",buf,idx++,NULL,0))
4504 incpush_use_sep(buf, 0, 0);
4509 #ifndef PERL_IS_MINIPERL
4510 /* miniperl gets just -I..., the split of $ENV{PERL5LIB}, and "." in @INC
4511 (and not the architecture specific directories from $ENV{PERL5LIB}) */
4513 /* Use the ~-expanded versions of APPLLIB (undocumented),
4514 SITEARCH, SITELIB, VENDORARCH, VENDORLIB, ARCHLIB and PRIVLIB
4517 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP),
4518 INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4522 /* sitearch is always relative to sitelib on Windows for
4523 * DLL-based path intuition to work correctly */
4524 # if !defined(WIN32)
4525 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITEARCH_EXP),
4526 INCPUSH_CAN_RELOCATE);
4532 /* this picks up sitearch as well */
4533 s = PerlEnv_sitelib_path(PERL_FS_VERSION, &len);
4535 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4537 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_EXP), INCPUSH_CAN_RELOCATE);
4541 #ifdef PERL_VENDORARCH_EXP
4542 /* vendorarch is always relative to vendorlib on Windows for
4543 * DLL-based path intuition to work correctly */
4544 # if !defined(WIN32)
4545 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORARCH_EXP),
4546 INCPUSH_CAN_RELOCATE);
4550 #ifdef PERL_VENDORLIB_EXP
4552 /* this picks up vendorarch as well */
4553 s = PerlEnv_vendorlib_path(PERL_FS_VERSION, &len);
4555 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4557 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_EXP),
4558 INCPUSH_CAN_RELOCATE);
4563 S_incpush_use_sep(aTHX_ STR_WITH_LEN(ARCHLIB_EXP), INCPUSH_CAN_RELOCATE);
4567 # define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
4571 s = PerlEnv_lib_path(PERL_FS_VERSION, &len);
4573 incpush_use_sep(s, len, INCPUSH_ADD_SUB_DIRS|INCPUSH_CAN_RELOCATE);
4576 S_incpush_use_sep(aTHX_ PRIVLIB_EXP, 0, INCPUSH_CAN_RELOCATE);
4578 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PRIVLIB_EXP), INCPUSH_CAN_RELOCATE);
4582 #ifdef PERL_OTHERLIBDIRS
4583 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4584 INCPUSH_ADD_VERSIONED_SUB_DIRS|INCPUSH_NOT_BASEDIR
4585 |INCPUSH_CAN_RELOCATE);
4588 if (!TAINTING_get) {
4591 * It isn't possible to delete an environment variable with
4592 * PERL_USE_SAFE_PUTENV set unless unsetenv() is also available, so in that
4593 * case we treat PERL5LIB as undefined if it has a zero-length value.
4595 #if defined(PERL_USE_SAFE_PUTENV) && ! defined(HAS_UNSETENV)
4596 if (perl5lib && *perl5lib != '\0')
4600 incpush_use_sep(perl5lib, 0,
4601 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4603 /* Treat PERL5?LIB as a possible search list logical name -- the
4604 * "natural" VMS idiom for a Unix path string. We allow each
4605 * element to be a set of |-separated directories for compatibility.
4609 if (vmstrnenv("PERL5LIB",buf,0,NULL,0))
4611 incpush_use_sep(buf, 0,
4612 INCPUSH_ADD_OLD_VERS|INCPUSH_NOT_BASEDIR);
4613 } while (vmstrnenv("PERL5LIB",buf,++idx,NULL,0));
4617 /* Use the ~-expanded versions of APPLLIB (undocumented),
4618 SITELIB and VENDORLIB for older versions
4621 S_incpush_use_sep(aTHX_ STR_WITH_LEN(APPLLIB_EXP), INCPUSH_ADD_OLD_VERS
4622 |INCPUSH_NOT_BASEDIR|INCPUSH_CAN_RELOCATE);
4625 #if defined(SITELIB_STEM) && defined(PERL_INC_VERSION_LIST)
4626 /* Search for version-specific dirs below here */
4627 S_incpush_use_sep(aTHX_ STR_WITH_LEN(SITELIB_STEM),
4628 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4632 #if defined(PERL_VENDORLIB_STEM) && defined(PERL_INC_VERSION_LIST)
4633 /* Search for version-specific dirs below here */
4634 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_VENDORLIB_STEM),
4635 INCPUSH_ADD_OLD_VERS|INCPUSH_CAN_RELOCATE);
4638 #ifdef PERL_OTHERLIBDIRS
4639 S_incpush_use_sep(aTHX_ STR_WITH_LEN(PERL_OTHERLIBDIRS),
4640 INCPUSH_ADD_OLD_VERS|INCPUSH_ADD_ARCHONLY_SUB_DIRS
4641 |INCPUSH_CAN_RELOCATE);
4643 #endif /* !PERL_IS_MINIPERL */
4645 if (!TAINTING_get) {
4646 #if !defined(PERL_IS_MINIPERL) && defined(DEFAULT_INC_EXCLUDES_DOT)
4647 const char * const unsafe = PerlEnv_getenv("PERL_USE_UNSAFE_INC");
4648 if (unsafe && strEQ(unsafe, "1"))
4650 S_incpush(aTHX_ STR_WITH_LEN("."), 0);
4654 #if defined(DOSISH) || defined(__SYMBIAN32__)
4655 # define PERLLIB_SEP ';'
4658 # define PERLLIB_SEP PL_perllib_sep
4660 # define PERLLIB_SEP ':'
4663 #ifndef PERLLIB_MANGLE
4664 # define PERLLIB_MANGLE(s,n) (s)
4667 #ifndef PERL_IS_MINIPERL
4668 /* Push a directory onto @INC if it exists.
4669 Generate a new SV if we do this, to save needing to copy the SV we push
4672 S_incpush_if_exists(pTHX_ AV *const av, SV *dir, SV *const stem)
4676 PERL_ARGS_ASSERT_INCPUSH_IF_EXISTS;
4678 if (PerlLIO_stat(SvPVX_const(dir), &tmpstatbuf) >= 0 &&
4679 S_ISDIR(tmpstatbuf.st_mode)) {
4681 dir = newSVsv(stem);
4683 /* Truncate dir back to stem. */
4684 SvCUR_set(dir, SvCUR(stem));
4691 S_mayberelocate(pTHX_ const char *const dir, STRLEN len, U32 flags)
4693 const U8 canrelocate = (U8)flags & INCPUSH_CAN_RELOCATE;
4696 PERL_ARGS_ASSERT_MAYBERELOCATE;
4699 /* I am not convinced that this is valid when PERLLIB_MANGLE is
4700 defined to so something (in os2/os2.c), but the code has been
4701 this way, ignoring any possible changed of length, since
4702 760ac839baf413929cd31cc32ffd6dba6b781a81 (5.003_02) so I'll leave
4704 libdir = newSVpvn(PERLLIB_MANGLE(dir, len), len);
4710 if ((unix = tounixspec_ts(SvPV(libdir,len),NULL)) != NULL) {
4712 while (len > 1 && unix[len-1] == '/') len--; /* Cosmetic */
4713 sv_usepvn(libdir,unix,len);
4716 PerlIO_printf(Perl_error_log,
4717 "Failed to unixify @INC element \"%s\"\n",
4718 SvPV_nolen_const(libdir));
4722 /* Do the if() outside the #ifdef to avoid warnings about an unused
4725 #ifdef PERL_RELOCATABLE_INC
4727 * Relocatable include entries are marked with a leading .../
4730 * 0: Remove that leading ".../"
4731 * 1: Remove trailing executable name (anything after the last '/')
4732 * from the perl path to give a perl prefix
4734 * While the @INC element starts "../" and the prefix ends with a real
4735 * directory (ie not . or ..) chop that real directory off the prefix
4736 * and the leading "../" from the @INC element. ie a logical "../"
4738 * Finally concatenate the prefix and the remainder of the @INC element
4739 * The intent is that /usr/local/bin/perl and .../../lib/perl5
4740 * generates /usr/local/lib/perl5
4742 const char *libpath = SvPVX(libdir);
4743 STRLEN libpath_len = SvCUR(libdir);
4744 if (libpath_len >= 4 && memEQ (libpath, ".../", 4)) {
4746 SV * const caret_X = get_sv("\030", 0);
4747 /* Going to use the SV just as a scratch buffer holding a C
4753 /* $^X is *the* source of taint if tainting is on, hence
4754 SvPOK() won't be true. */
4756 assert(SvPOKp(caret_X));
4757 prefix_sv = newSVpvn_flags(SvPVX(caret_X), SvCUR(caret_X),
4759 /* Firstly take off the leading .../
4760 If all else fail we'll do the paths relative to the current
4762 sv_chop(libdir, libpath + 4);
4763 /* Don't use SvPV as we're intentionally bypassing taining,
4764 mortal copies that the mg_get of tainting creates, and
4765 corruption that seems to come via the save stack.
4766 I guess that the save stack isn't correctly set up yet. */
4767 libpath = SvPVX(libdir);
4768 libpath_len = SvCUR(libdir);
4770 /* This would work more efficiently with memrchr, but as it's
4771 only a GNU extension we'd need to probe for it and
4772 implement our own. Not hard, but maybe not worth it? */
4774 prefix = SvPVX(prefix_sv);
4775 lastslash = strrchr(prefix, '/');
4777 /* First time in with the *lastslash = '\0' we just wipe off
4778 the trailing /perl from (say) /usr/foo/bin/perl
4782 while ((*lastslash = '\0'), /* Do that, come what may. */
4783 (libpath_len >= 3 && _memEQs(libpath, "../")
4784 && (lastslash = strrchr(prefix, '/')))) {
4785 if (lastslash[1] == '\0'
4786 || (lastslash[1] == '.'
4787 && (lastslash[2] == '/' /* ends "/." */
4788 || (lastslash[2] == '/'
4789 && lastslash[3] == '/' /* or "/.." */
4791 /* Prefix ends "/" or "/." or "/..", any of which
4792 are fishy, so don't do any more logical cleanup.
4796 /* Remove leading "../" from path */
4799 /* Next iteration round the loop removes the last
4800 directory name from prefix by writing a '\0' in
4801 the while clause. */
4803 /* prefix has been terminated with a '\0' to the correct
4804 length. libpath points somewhere into the libdir SV.
4805 We need to join the 2 with '/' and drop the result into
4807 tempsv = Perl_newSVpvf(aTHX_ "%s/%s", prefix, libpath);
4808 SvREFCNT_dec(libdir);
4809 /* And this is the new libdir. */
4812 (PerlProc_getuid() != PerlProc_geteuid() ||
4813 PerlProc_getgid() != PerlProc_getegid())) {
4814 /* Need to taint relocated paths if running set ID */
4815 SvTAINTED_on(libdir);
4818 SvREFCNT_dec(prefix_sv);
4826 S_incpush(pTHX_ const char *const dir, STRLEN len, U32 flags)
4828 #ifndef PERL_IS_MINIPERL
4829 const U8 using_sub_dirs
4830 = (U8)flags & (INCPUSH_ADD_VERSIONED_SUB_DIRS
4831 |INCPUSH_ADD_ARCHONLY_SUB_DIRS|INCPUSH_ADD_OLD_VERS);
4832 const U8 add_versioned_sub_dirs
4833 = (U8)flags & INCPUSH_ADD_VERSIONED_SUB_DIRS;
4834 const U8 add_archonly_sub_dirs
4835 = (U8)flags & INCPUSH_ADD_ARCHONLY_SUB_DIRS;
4836 #ifdef PERL_INC_VERSION_LIST
4837 const U8 addoldvers = (U8)flags & INCPUSH_ADD_OLD_VERS;
4840 const U8 unshift = (U8)flags & INCPUSH_UNSHIFT;
4841 const U8 push_basedir = (flags & INCPUSH_NOT_BASEDIR) ? 0 : 1;
4842 AV *const inc = GvAVn(PL_incgv);
4844 PERL_ARGS_ASSERT_INCPUSH;
4847 /* Could remove this vestigial extra block, if we don't mind a lot of
4848 re-indenting diff noise. */
4850 SV *const libdir = mayberelocate(dir, len, flags);
4851 /* Change 20189146be79a0596543441fa369c6bf7f85103f, to fix RT#6665,
4852 arranged to unshift #! line -I onto the front of @INC. However,
4853 -I can add version and architecture specific libraries, and they
4854 need to go first. The old code assumed that it was always
4855 pushing. Hence to make it work, need to push the architecture
4856 (etc) libraries onto a temporary array, then "unshift" that onto
4857 the front of @INC. */
4858 #ifndef PERL_IS_MINIPERL
4859 AV *const av = (using_sub_dirs) ? (unshift ? newAV() : inc) : NULL;
4862 * BEFORE pushing libdir onto @INC we may first push version- and
4863 * archname-specific sub-directories.
4865 if (using_sub_dirs) {
4866 SV *subdir = newSVsv(libdir);
4867 #ifdef PERL_INC_VERSION_LIST
4868 /* Configure terminates PERL_INC_VERSION_LIST with a NULL */
4869 const char * const incverlist[] = { PERL_INC_VERSION_LIST };
4870 const char * const *incver;
4873 if (add_versioned_sub_dirs) {
4874 /* .../version/archname if -d .../version/archname */
4875 sv_catpvs(subdir, "/" PERL_FS_VERSION "/" ARCHNAME);
4876 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4878 /* .../version if -d .../version */
4879 sv_catpvs(subdir, "/" PERL_FS_VERSION);
4880 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4883 #ifdef PERL_INC_VERSION_LIST
4885 for (incver = incverlist; *incver; incver++) {
4886 /* .../xxx if -d .../xxx */
4887 Perl_sv_catpvf(aTHX_ subdir, "/%s", *incver);
4888 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4893 if (add_archonly_sub_dirs) {
4894 /* .../archname if -d .../archname */
4895 sv_catpvs(subdir, "/" ARCHNAME);
4896 subdir = S_incpush_if_exists(aTHX_ av, subdir, libdir);
4900 assert (SvREFCNT(subdir) == 1);
4901 SvREFCNT_dec(subdir);
4903 #endif /* !PERL_IS_MINIPERL */
4904 /* finally add this lib directory at the end of @INC */
4906 #ifdef PERL_IS_MINIPERL
4907 const Size_t extra = 0;
4909 Size_t extra = av_tindex(av) + 1;
4911 av_unshift(inc, extra + push_basedir);
4913 av_store(inc, extra, libdir);
4914 #ifndef PERL_IS_MINIPERL
4916 /* av owns a reference, av_store() expects to be donated a
4917 reference, and av expects to be sane when it's cleared.
4918 If I wanted to be naughty and wrong, I could peek inside the
4919 implementation of av_clear(), realise that it uses
4920 SvREFCNT_dec() too, so av's array could be a run of NULLs,
4921 and so directly steal from it (with a memcpy() to inc, and
4922 then memset() to NULL them out. But people copy code from the
4923 core expecting it to be best practise, so let's use the API.
4924 Although studious readers will note that I'm not checking any
4926 av_store(inc, extra, SvREFCNT_inc(*av_fetch(av, extra, FALSE)));
4931 else if (push_basedir) {
4932 av_push(inc, libdir);
4935 if (!push_basedir) {
4936 assert (SvREFCNT(libdir) == 1);
4937 SvREFCNT_dec(libdir);
4943 S_incpush_use_sep(pTHX_ const char *p, STRLEN len, U32 flags)
4947 /* This logic has been broken out from S_incpush(). It may be possible to
4950 PERL_ARGS_ASSERT_INCPUSH_USE_SEP;
4952 /* perl compiled with -DPERL_RELOCATABLE_INCPUSH will ignore the len
4953 * argument to incpush_use_sep. This allows creation of relocatable
4954 * Perl distributions that patch the binary at install time. Those
4955 * distributions will have to provide their own relocation tools; this
4956 * is not a feature otherwise supported by core Perl.
4958 #ifndef PERL_RELOCATABLE_INCPUSH
4965 /* Break at all separators */
4966 while ((s = (const char*)memchr(p, PERLLIB_SEP, end - p))) {
4968 /* skip any consecutive separators */
4970 /* Uncomment the next line for PATH semantics */
4971 /* But you'll need to write tests */
4972 /* av_push(GvAVn(PL_incgv), newSVpvs(".")); */
4974 incpush(p, (STRLEN)(s - p), flags);
4979 incpush(p, (STRLEN)(end - p), flags);
4984 Perl_call_list(pTHX_ I32 oldscope, AV *paramList)
4987 VOL const line_t oldline = PL_curcop ? CopLINE(PL_curcop) : 0;
4993 PERL_ARGS_ASSERT_CALL_LIST;
4995 while (av_tindex(paramList) >= 0) {
4996 cv = MUTABLE_CV(av_shift(paramList));
4998 if (paramList == PL_beginav) {
4999 /* save PL_beginav for compiler */
5000 Perl_av_create_and_push(aTHX_ &PL_beginav_save, MUTABLE_SV(cv));
5002 else if (paramList == PL_checkav) {
5003 /* save PL_checkav for compiler */
5004 Perl_av_create_and_push(aTHX_ &PL_checkav_save, MUTABLE_SV(cv));
5006 else if (paramList == PL_unitcheckav) {
5007 /* save PL_unitcheckav for compiler */
5008 Perl_av_create_and_push(aTHX_ &PL_unitcheckav_save, MUTABLE_SV(cv));
5018 (void)SvPV_const(atsv, len);
5020 PL_curcop = &PL_compiling;
5021 CopLINE_set(PL_curcop, oldline);
5022 if (paramList == PL_beginav)
5023 sv_catpvs(atsv, "BEGIN failed--compilation aborted");
5025 Perl_sv_catpvf(aTHX_ atsv,
5026 "%s failed--call queue aborted",
5027 paramList == PL_checkav ? "CHECK"
5028 : paramList == PL_initav ? "INIT"
5029 : paramList == PL_unitcheckav ? "UNITCHECK"
5031 while (PL_scopestack_ix > oldscope)
5034 Perl_croak(aTHX_ "%" SVf, SVfARG(atsv));
5041 /* my_exit() was called */
5042 while (PL_scopestack_ix > oldscope)
5045 SET_CURSTASH(PL_defstash);
5046 PL_curcop = &PL_compiling;
5047 CopLINE_set(PL_curcop, oldline);
5050 NOT_REACHED; /* NOTREACHED */
5053 PL_curcop = &PL_compiling;
5054 CopLINE_set(PL_curcop, oldline);
5057 PerlIO_printf(Perl_error_log, "panic: restartop in call_list\n");
5066 Perl_my_exit(pTHX_ U32 status)
5068 if (PL_exit_flags & PERL_EXIT_ABORT) {
5071 if (PL_exit_flags & PERL_EXIT_WARN) {
5072 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5073 Perl_warn(aTHX_ "Unexpected exit %lu", (unsigned long)status);
5074 PL_exit_flags &= ~PERL_EXIT_ABORT;
5084 STATUS_EXIT_SET(status);
5091 Perl_my_failure_exit(pTHX)
5094 /* We have been called to fall on our sword. The desired exit code
5095 * should be already set in STATUS_UNIX, but could be shifted over
5096 * by 8 bits. STATUS_UNIX_EXIT_SET will handle the cases where a
5099 * If an error code has not been set, then force the issue.
5101 if (MY_POSIX_EXIT) {
5103 /* According to the die_exit.t tests, if errno is non-zero */
5104 /* It should be used for the error status. */
5106 if (errno == EVMSERR) {
5107 STATUS_NATIVE = vaxc$errno;
5110 /* According to die_exit.t tests, if the child_exit code is */
5111 /* also zero, then we need to exit with a code of 255 */
5112 if ((errno != 0) && (errno < 256))
5113 STATUS_UNIX_EXIT_SET(errno);
5114 else if (STATUS_UNIX < 255) {
5115 STATUS_UNIX_EXIT_SET(255);
5120 /* The exit code could have been set by $? or vmsish which
5121 * means that it may not have fatal set. So convert
5122 * success/warning codes to fatal with out changing
5123 * the POSIX status code. The severity makes VMS native
5124 * status handling work, while UNIX mode programs use the
5125 * the POSIX exit codes.
5127 if ((STATUS_NATIVE & (STS$K_SEVERE|STS$K_ERROR)) == 0) {
5128 STATUS_NATIVE &= STS$M_COND_ID;
5129 STATUS_NATIVE |= STS$K_ERROR | STS$M_INHIB_MSG;
5133 /* Traditionally Perl on VMS always expects a Fatal Error. */
5134 if (vaxc$errno & 1) {
5136 /* So force success status to failure */
5137 if (STATUS_NATIVE & 1)
5142 STATUS_UNIX = EINTR; /* In case something cares */
5147 STATUS_NATIVE = vaxc$errno; /* Should already be this */
5149 /* Encode the severity code */
5150 severity = STATUS_NATIVE & STS$M_SEVERITY;
5151 STATUS_UNIX = (severity ? severity : 1) << 8;
5153 /* Perl expects this to be a fatal error */
5154 if (severity != STS$K_SEVERE)
5163 STATUS_UNIX_SET(errno);
5165 exitstatus = STATUS_UNIX >> 8;
5166 if (exitstatus & 255)
5167 STATUS_UNIX_SET(exitstatus);
5169 STATUS_UNIX_SET(255);
5172 if (PL_exit_flags & PERL_EXIT_ABORT) {
5175 if (PL_exit_flags & PERL_EXIT_WARN) {
5176 PL_exit_flags |= PERL_EXIT_ABORT; /* Protect against reentrant calls */
5177 Perl_warn(aTHX_ "Unexpected exit failure %ld", (long)PL_statusvalue);
5178 PL_exit_flags &= ~PERL_EXIT_ABORT;
5184 S_my_exit_jump(pTHX)
5187 SvREFCNT_dec(PL_e_script);
5191 POPSTACK_TO(PL_mainstack);
5192 if (cxstack_ix >= 0) {
5194 cx_popblock(cxstack);
5202 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen)
5204 const char * const p = SvPVX_const(PL_e_script);
5205 const char *nl = strchr(p, '\n');
5207 PERL_UNUSED_ARG(idx);
5208 PERL_UNUSED_ARG(maxlen);
5210 nl = (nl) ? nl+1 : SvEND(PL_e_script);
5212 filter_del(read_e_script);
5215 sv_catpvn(buf_sv, p, nl-p);
5216 sv_chop(PL_e_script, nl);
5220 /* removes boilerplate code at the end of each boot_Module xsub */
5222 Perl_xs_boot_epilog(pTHX_ const I32 ax)
5225 call_list(PL_scopestack_ix, PL_unitcheckav);
5230 * ex: set ts=8 sts=4 sw=4 et: