3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
12 * Sam sat on the ground and put his head in his hands. 'I wish I had never
13 * come here, and I don't want to see no more magic,' he said, and fell silent.
15 * [p.363 of _The Lord of the Rings_, II/vii: "The Mirror of Galadriel"]
19 =head1 Magical Functions
20 "Magic" is special data attached to SV structures in order to give them
21 "magical" properties. When any Perl code tries to read from, or assign to,
22 an SV marked as magical, it calls the 'get' or 'set' function associated
23 with that SV's magic. A get is called prior to reading an SV, in order to
24 give it a chance to update its internal value (get on $. writes the line
25 number of the last read filehandle into the SV's IV slot), while
26 set is called after an SV has been written to, in order to allow it to make
27 use of its changed value (set on $/ copies the SV's new value to the
28 PL_rs global variable).
30 Magic is implemented as a linked list of MAGIC structures attached to the
31 SV. Each MAGIC struct holds the type of the magic, a pointer to an array
32 of functions that implement the get(), set(), length() etc functions,
33 plus space for some flags and pointers. For example, a tied variable has
34 a MAGIC structure that contains a pointer to the object associated with the
45 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
51 #if defined(HAS_SETGROUPS)
58 # include <sys/pstat.h>
61 #ifdef HAS_PRCTL_SET_NAME
62 # include <sys/prctl.h>
65 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
66 Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
68 Signal_t Perl_csighandler(int sig);
72 /* Missing protos on LynxOS */
73 void setruid(uid_t id);
74 void seteuid(uid_t id);
75 void setrgid(uid_t id);
76 void setegid(uid_t id);
80 * Pre-magic setup and post-magic takedown.
81 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
90 /* MGS is typedef'ed to struct magic_state in perl.h */
93 S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags)
98 PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS;
100 assert(SvMAGICAL(sv));
102 /* we shouldn't really be called here with RC==0, but it can sometimes
103 * happen via mg_clear() (which also shouldn't be called when RC==0,
104 * but it can happen). Handle this case gracefully(ish) by not RC++
105 * and thus avoiding the resultant double free */
106 if (SvREFCNT(sv) > 0) {
107 /* guard against sv getting freed midway through the mg clearing,
108 * by holding a private reference for the duration. */
109 SvREFCNT_inc_simple_void_NN(sv);
113 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
115 mgs = SSPTR(mgs_ix, MGS*);
117 mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
118 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
119 mgs->mgs_bumped = bumped;
121 SvFLAGS(sv) &= ~flags;
125 #define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG)
128 =for apidoc mg_magical
130 Turns on the magical status of an SV. See C<sv_magic>.
136 Perl_mg_magical(SV *sv)
139 PERL_ARGS_ASSERT_MG_MAGICAL;
142 if ((mg = SvMAGIC(sv))) {
144 const MGVTBL* const vtbl = mg->mg_virtual;
146 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
153 } while ((mg = mg->mg_moremagic));
154 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
162 Do magic before a value is retrieved from the SV. The type of SV must
163 be >= SVt_PVMG. See C<sv_magic>.
169 Perl_mg_get(pTHX_ SV *sv)
171 const I32 mgs_ix = SSNEW(sizeof(MGS));
174 MAGIC *newmg, *head, *cur, *mg;
176 PERL_ARGS_ASSERT_MG_GET;
178 if (PL_localizing == 1 && sv == DEFSV) return 0;
180 /* We must call svt_get(sv, mg) for each valid entry in the linked
181 list of magic. svt_get() may delete the current entry, add new
182 magic to the head of the list, or upgrade the SV. AMS 20010810 */
184 newmg = cur = head = mg = SvMAGIC(sv);
186 const MGVTBL * const vtbl = mg->mg_virtual;
187 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
189 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
191 /* taint's mg get is so dumb it doesn't need flag saving */
192 if (!saved && mg->mg_type != PERL_MAGIC_taint) {
193 save_magic(mgs_ix, sv);
197 vtbl->svt_get(aTHX_ sv, mg);
199 /* guard against magic having been deleted - eg FETCH calling
202 /* recalculate flags */
203 (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG);
207 /* recalculate flags if this entry was deleted. */
208 if (mg->mg_flags & MGf_GSKIP)
209 (SSPTR(mgs_ix, MGS *))->mgs_flags &=
210 ~(SVs_GMG|SVs_SMG|SVs_RMG);
212 else if (vtbl == &PL_vtbl_utf8) {
213 /* get-magic can reallocate the PV */
214 magic_setutf8(sv, mg);
220 /* Have we finished with the new entries we saw? Start again
221 where we left off (unless there are more new entries). */
229 /* Were any new entries added? */
230 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
234 /* recalculate flags */
235 (SSPTR(mgs_ix, MGS *))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG);
240 restore_magic(INT2PTR(void *, (IV)mgs_ix));
248 Do magic after a value is assigned to the SV. See C<sv_magic>.
254 Perl_mg_set(pTHX_ SV *sv)
256 const I32 mgs_ix = SSNEW(sizeof(MGS));
260 PERL_ARGS_ASSERT_MG_SET;
262 if (PL_localizing == 2 && sv == DEFSV) return 0;
264 save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */
266 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
267 const MGVTBL* vtbl = mg->mg_virtual;
268 nextmg = mg->mg_moremagic; /* it may delete itself */
269 if (mg->mg_flags & MGf_GSKIP) {
270 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
271 (SSPTR(mgs_ix, MGS*))->mgs_flags &= ~(SVs_GMG|SVs_SMG|SVs_RMG);
273 if (PL_localizing == 2
274 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
276 if (vtbl && vtbl->svt_set)
277 vtbl->svt_set(aTHX_ sv, mg);
280 restore_magic(INT2PTR(void*, (IV)mgs_ix));
285 =for apidoc mg_length
287 Reports on the SV's length in bytes, calling length magic if available,
288 but does not set the UTF8 flag on the sv. It will fall back to 'get'
289 magic if there is no 'length' magic, but with no indication as to
290 whether it called 'get' magic. It assumes the sv is a PVMG or
291 higher. Use sv_len() instead.
297 Perl_mg_length(pTHX_ SV *sv)
302 PERL_ARGS_ASSERT_MG_LENGTH;
304 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
305 const MGVTBL * const vtbl = mg->mg_virtual;
306 if (vtbl && vtbl->svt_len) {
307 const I32 mgs_ix = SSNEW(sizeof(MGS));
308 save_magic(mgs_ix, sv);
309 /* omit MGf_GSKIP -- not changed here */
310 len = vtbl->svt_len(aTHX_ sv, mg);
311 restore_magic(INT2PTR(void*, (IV)mgs_ix));
316 (void)SvPV_const(sv, len);
321 Perl_mg_size(pTHX_ SV *sv)
325 PERL_ARGS_ASSERT_MG_SIZE;
327 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
328 const MGVTBL* const vtbl = mg->mg_virtual;
329 if (vtbl && vtbl->svt_len) {
330 const I32 mgs_ix = SSNEW(sizeof(MGS));
332 save_magic(mgs_ix, sv);
333 /* omit MGf_GSKIP -- not changed here */
334 len = vtbl->svt_len(aTHX_ sv, mg);
335 restore_magic(INT2PTR(void*, (IV)mgs_ix));
342 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
346 Perl_croak(aTHX_ "Size magic not implemented");
349 NOT_REACHED; /* NOTREACHED */
355 Clear something magical that the SV represents. See C<sv_magic>.
361 Perl_mg_clear(pTHX_ SV *sv)
363 const I32 mgs_ix = SSNEW(sizeof(MGS));
367 PERL_ARGS_ASSERT_MG_CLEAR;
369 save_magic(mgs_ix, sv);
371 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
372 const MGVTBL* const vtbl = mg->mg_virtual;
373 /* omit GSKIP -- never set here */
375 nextmg = mg->mg_moremagic; /* it may delete itself */
377 if (vtbl && vtbl->svt_clear)
378 vtbl->svt_clear(aTHX_ sv, mg);
381 restore_magic(INT2PTR(void*, (IV)mgs_ix));
386 S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
393 assert(!(SvTYPE(sv) == SVt_PVAV && AvPAD_NAMELIST(sv)));
395 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
396 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
408 Finds the magic pointer for type matching the SV. See C<sv_magic>.
414 Perl_mg_find(const SV *sv, int type)
416 return S_mg_findext_flags(sv, type, NULL, 0);
420 =for apidoc mg_findext
422 Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
429 Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl)
431 return S_mg_findext_flags(sv, type, vtbl, 1);
435 Perl_mg_find_mglob(pTHX_ SV *sv)
437 PERL_ARGS_ASSERT_MG_FIND_MGLOB;
438 if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') {
439 /* This sv is only a delegate. //g magic must be attached to
444 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
445 return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0);
452 Copies the magic from one SV to another. See C<sv_magic>.
458 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
463 PERL_ARGS_ASSERT_MG_COPY;
465 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
466 const MGVTBL* const vtbl = mg->mg_virtual;
467 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
468 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
471 const char type = mg->mg_type;
472 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
474 (type == PERL_MAGIC_tied)
476 : (type == PERL_MAGIC_regdata && mg->mg_obj)
479 toLOWER(type), key, klen);
488 =for apidoc mg_localize
490 Copy some of the magic from an existing SV to new localized version of that
491 SV. Container magic (eg %ENV, $1, tie)
492 gets copied, value magic doesn't (eg
495 If setmagic is false then no set magic will be called on the new (empty) SV.
496 This typically means that assignment will soon follow (e.g. 'local $x = $y'),
497 and that will handle the magic.
503 Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
507 PERL_ARGS_ASSERT_MG_LOCALIZE;
512 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
513 const MGVTBL* const vtbl = mg->mg_virtual;
514 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
517 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
518 (void)vtbl->svt_local(aTHX_ nsv, mg);
520 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
521 mg->mg_ptr, mg->mg_len);
523 /* container types should remain read-only across localization */
524 SvFLAGS(nsv) |= SvREADONLY(sv);
527 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
528 SvFLAGS(nsv) |= SvMAGICAL(sv);
537 #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
539 S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
541 const MGVTBL* const vtbl = mg->mg_virtual;
542 if (vtbl && vtbl->svt_free)
543 vtbl->svt_free(aTHX_ sv, mg);
544 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
545 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
546 Safefree(mg->mg_ptr);
547 else if (mg->mg_len == HEf_SVKEY)
548 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
550 if (mg->mg_flags & MGf_REFCOUNTED)
551 SvREFCNT_dec(mg->mg_obj);
558 Free any magic storage used by the SV. See C<sv_magic>.
564 Perl_mg_free(pTHX_ SV *sv)
569 PERL_ARGS_ASSERT_MG_FREE;
571 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
572 moremagic = mg->mg_moremagic;
573 mg_free_struct(sv, mg);
574 SvMAGIC_set(sv, moremagic);
576 SvMAGIC_set(sv, NULL);
582 =for apidoc Am|void|mg_free_type|SV *sv|int how
584 Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
590 Perl_mg_free_type(pTHX_ SV *sv, int how)
592 MAGIC *mg, *prevmg, *moremg;
593 PERL_ARGS_ASSERT_MG_FREE_TYPE;
594 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
596 moremg = mg->mg_moremagic;
597 if (mg->mg_type == how) {
598 /* temporarily move to the head of the magic chain, in case
599 custom free code relies on this historical aspect of mg_free */
601 prevmg->mg_moremagic = moremg;
602 mg->mg_moremagic = SvMAGIC(sv);
605 newhead = mg->mg_moremagic;
606 mg_free_struct(sv, mg);
607 SvMAGIC_set(sv, newhead);
617 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
621 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
624 const REGEXP * const rx = PM_GETRE(PL_curpm);
626 if (mg->mg_obj) { /* @+ */
627 /* return the number possible */
628 return RX_NPARENS(rx);
630 I32 paren = RX_LASTPAREN(rx);
632 /* return the last filled */
634 && (RX_OFFS(rx)[paren].start == -1
635 || RX_OFFS(rx)[paren].end == -1) )
648 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
650 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
653 const REGEXP * const rx = PM_GETRE(PL_curpm);
655 const I32 paren = mg->mg_len;
660 if (paren <= (I32)RX_NPARENS(rx) &&
661 (s = RX_OFFS(rx)[paren].start) != -1 &&
662 (t = RX_OFFS(rx)[paren].end) != -1)
665 if (mg->mg_obj) /* @+ */
670 if (RX_MATCH_UTF8(rx)) {
671 const char * const b = RX_SUBBEG(rx);
673 i = RX_SUBCOFFSET(rx) +
675 (U8*)(b-RX_SUBOFFSET(rx)+i));
690 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
692 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
696 Perl_croak_no_modify();
697 NORETURN_FUNCTION_END;
700 #define SvRTRIM(sv) STMT_START { \
702 STRLEN len = SvCUR(sv); \
703 char * const p = SvPVX(sv); \
704 while (len > 0 && isSPACE(p[len-1])) \
706 SvCUR_set(sv, len); \
712 Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
714 PERL_ARGS_ASSERT_EMULATE_COP_IO;
716 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
717 sv_setsv(sv, &PL_sv_undef);
721 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
722 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
727 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
728 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
736 S_fixup_errno_string(pTHX_ SV* sv)
738 /* Do what is necessary to fixup the non-empty string in 'sv' for return to
741 PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING;
745 if(strEQ(SvPVX(sv), "")) {
746 sv_catpv(sv, UNKNOWN_ERRNO_MSG);
750 /* In some locales the error string may come back as UTF-8, in which
751 * case we should turn on that flag. This didn't use to happen, and to
752 * avoid as many possible backward compatibility issues as possible, we
753 * don't turn on the flag unless we have to. So the flag stays off for
754 * an entirely ASCII string. We assume that if the string looks like
755 * UTF-8, it really is UTF-8: "text in any other encoding that uses
756 * bytes with the high bit set is extremely unlikely to pass a UTF-8
757 * validity test" (http://en.wikipedia.org/wiki/Charset_detection).
758 * There is a potential that we will get it wrong however, especially
759 * on short error message text. (If it turns out to be necessary, we
760 * could also keep track if the current LC_MESSAGES locale is UTF-8) */
761 if (! IN_BYTES /* respect 'use bytes' */
762 && ! is_ascii_string((U8*) SvPVX_const(sv), SvCUR(sv))
763 && is_utf8_string((U8*) SvPVX_const(sv), SvCUR(sv)))
776 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
779 const char *s = NULL;
781 const char * const remaining = mg->mg_ptr + 1;
784 PERL_ARGS_ASSERT_MAGIC_GET;
788 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
790 CALLREG_NUMBUF_FETCH(rx,paren,sv);
792 sv_setsv(sv,&PL_sv_undef);
797 nextchar = *remaining;
798 switch (*mg->mg_ptr) {
799 case '\001': /* ^A */
800 if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget);
801 else sv_setsv(sv, &PL_sv_undef);
802 if (SvTAINTED(PL_bodytarget))
805 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
806 if (nextchar == '\0') {
807 sv_setiv(sv, (IV)PL_minus_c);
809 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
810 sv_setiv(sv, (IV)STATUS_NATIVE);
814 case '\004': /* ^D */
815 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
817 case '\005': /* ^E */
818 if (nextchar != '\0') {
819 if (strEQ(remaining, "NCODING"))
820 sv_setsv(sv, PL_encoding);
824 #if defined(VMS) || defined(OS2) || defined(WIN32)
828 $DESCRIPTOR(msgdsc,msg);
829 sv_setnv(sv,(NV) vaxc$errno);
830 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
831 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
836 if (!(_emx_env & 0x200)) { /* Under DOS */
837 sv_setnv(sv, (NV)errno);
838 sv_setpv(sv, errno ? my_strerror(errno) : "");
840 if (errno != errno_isOS2) {
841 const int tmp = _syserrno();
842 if (tmp) /* 2nd call to _syserrno() makes it 0 */
845 sv_setnv(sv, (NV)Perl_rc);
846 sv_setpv(sv, os2error(Perl_rc));
848 if (SvOK(sv) && strNE(SvPVX(sv), "")) {
849 fixup_errno_string(sv);
851 # elif defined(WIN32)
853 const DWORD dwErr = GetLastError();
854 sv_setnv(sv, (NV)dwErr);
856 PerlProc_GetOSError(sv, dwErr);
857 fixup_errno_string(sv);
864 # error Missing code for platform
867 SvNOK_on(sv); /* what a wonderful hack! */
869 #endif /* End of platforms with special handling for $^E; others just fall
876 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
878 sv_setnv(sv, (NV)errno);
881 if (errno == errno_isOS2 || errno == errno_isOS2_set)
882 sv_setpv(sv, os2error(Perl_rc));
890 /* Strerror can return NULL on some platforms, which will
891 * result in 'sv' not being considered SvOK. The SvNOK_on()
892 * below will cause just the number part to be valid */
893 sv_setpv(sv, my_strerror(errno));
895 fixup_errno_string(sv);
902 SvNOK_on(sv); /* what a wonderful hack! */
905 case '\006': /* ^F */
906 sv_setiv(sv, (IV)PL_maxsysfd);
908 case '\007': /* ^GLOBAL_PHASE */
909 if (strEQ(remaining, "LOBAL_PHASE")) {
910 sv_setpvn(sv, PL_phase_names[PL_phase],
911 strlen(PL_phase_names[PL_phase]));
914 case '\010': /* ^H */
915 sv_setiv(sv, (IV)PL_hints);
917 case '\011': /* ^I */ /* NOT \t in EBCDIC */
918 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
920 case '\014': /* ^LAST_FH */
921 if (strEQ(remaining, "AST_FH")) {
923 assert(isGV_with_GP(PL_last_in_gv));
924 SV_CHECK_THINKFIRST_COW_DROP(sv);
925 prepare_SV_for_RV(sv);
927 SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv));
931 else sv_setsv_nomg(sv, NULL);
934 case '\017': /* ^O & ^OPEN */
935 if (nextchar == '\0') {
936 sv_setpv(sv, PL_osname);
939 else if (strEQ(remaining, "PEN")) {
940 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
944 sv_setiv(sv, (IV)PL_perldb);
946 case '\023': /* ^S */
948 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
951 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
956 case '\024': /* ^T */
957 if (nextchar == '\0') {
959 sv_setnv(sv, PL_basetime);
961 sv_setiv(sv, (IV)PL_basetime);
964 else if (strEQ(remaining, "AINT"))
965 sv_setiv(sv, TAINTING_get
966 ? (TAINT_WARN_get || PL_unsafe ? -1 : 1)
969 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
970 if (strEQ(remaining, "NICODE"))
971 sv_setuv(sv, (UV) PL_unicode);
972 else if (strEQ(remaining, "TF8LOCALE"))
973 sv_setuv(sv, (UV) PL_utf8locale);
974 else if (strEQ(remaining, "TF8CACHE"))
975 sv_setiv(sv, (IV) PL_utf8cache);
977 case '\027': /* ^W & $^WARNING_BITS */
978 if (nextchar == '\0')
979 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
980 else if (strEQ(remaining, "ARNING_BITS")) {
981 if (PL_compiling.cop_warnings == pWARN_NONE) {
982 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
984 else if (PL_compiling.cop_warnings == pWARN_STD) {
985 sv_setsv(sv, &PL_sv_undef);
988 else if (PL_compiling.cop_warnings == pWARN_ALL) {
989 /* Get the bit mask for $warnings::Bits{all}, because
990 * it could have been extended by warnings::register */
991 HV * const bits = get_hv("warnings::Bits", 0);
992 SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL;
994 sv_copypv(sv, *bits_all);
996 sv_setpvn(sv, WARN_ALLstring, WARNsize);
999 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
1000 *PL_compiling.cop_warnings);
1005 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
1006 paren = RX_LASTPAREN(rx);
1008 goto do_numbuf_fetch;
1010 sv_setsv(sv,&PL_sv_undef);
1012 case '\016': /* ^N */
1013 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
1014 paren = RX_LASTCLOSEPAREN(rx);
1016 goto do_numbuf_fetch;
1018 sv_setsv(sv,&PL_sv_undef);
1021 if (GvIO(PL_last_in_gv)) {
1022 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
1027 sv_setiv(sv, (IV)STATUS_CURRENT);
1028 #ifdef COMPLEX_STATUS
1029 SvUPGRADE(sv, SVt_PVLV);
1030 LvTARGOFF(sv) = PL_statusvalue;
1031 LvTARGLEN(sv) = PL_statusvalue_vms;
1036 if (GvIOp(PL_defoutgv))
1037 s = IoTOP_NAME(GvIOp(PL_defoutgv));
1041 sv_setpv(sv,GvENAME(PL_defoutgv));
1042 sv_catpvs(sv,"_TOP");
1046 if (GvIOp(PL_defoutgv))
1047 s = IoFMT_NAME(GvIOp(PL_defoutgv));
1049 s = GvENAME(PL_defoutgv);
1053 if (GvIO(PL_defoutgv))
1054 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
1057 if (GvIO(PL_defoutgv))
1058 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
1061 if (GvIO(PL_defoutgv))
1062 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
1072 if (GvIO(PL_defoutgv))
1073 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
1077 sv_copypv(sv, PL_ors_sv);
1079 sv_setsv(sv, &PL_sv_undef);
1083 IV const pid = (IV)PerlProc_getpid();
1084 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
1085 /* never set manually, or at least not since last fork */
1087 /* never unsafe, even if reading in a tainted expression */
1090 /* else a value has been assigned manually, so do nothing */
1094 sv_setuid(sv, PerlProc_getuid());
1097 sv_setuid(sv, PerlProc_geteuid());
1100 sv_setgid(sv, PerlProc_getgid());
1103 sv_setgid(sv, PerlProc_getegid());
1105 #ifdef HAS_GETGROUPS
1107 Groups_t *gary = NULL;
1109 I32 num_groups = getgroups(0, gary);
1110 if (num_groups > 0) {
1111 Newx(gary, num_groups, Groups_t);
1112 num_groups = getgroups(num_groups, gary);
1113 for (i = 0; i < num_groups; i++)
1114 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
1118 (void)SvIOK_on(sv); /* what a wonderful hack! */
1128 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
1130 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
1132 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1134 if (uf && uf->uf_val)
1135 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
1140 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
1142 STRLEN len = 0, klen;
1143 const char * const key = MgPV_const(mg,klen);
1146 PERL_ARGS_ASSERT_MAGIC_SETENV;
1150 /* defined environment variables are byte strings; unfortunately
1151 there is no SvPVbyte_force_nomg(), so we must do this piecewise */
1152 (void)SvPV_force_nomg_nolen(sv);
1153 sv_utf8_downgrade(sv, /* fail_ok */ TRUE);
1155 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv");
1161 my_setenv(key, s); /* does the deed */
1163 #ifdef DYNAMIC_ENV_FETCH
1164 /* We just undefd an environment var. Is a replacement */
1165 /* waiting in the wings? */
1167 SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE);
1169 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
1173 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
1174 /* And you'll never guess what the dog had */
1175 /* in its mouth... */
1177 MgTAINTEDDIR_off(mg);
1179 if (s && klen == 8 && strEQ(key, "DCL$PATH")) {
1180 char pathbuf[256], eltbuf[256], *cp, *elt;
1183 my_strlcpy(eltbuf, s, sizeof(eltbuf));
1185 do { /* DCL$PATH may be a search list */
1186 while (1) { /* as may dev portion of any element */
1187 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1188 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1189 cando_by_name(S_IWUSR,0,elt) ) {
1190 MgTAINTEDDIR_on(mg);
1194 if ((cp = strchr(elt, ':')) != NULL)
1196 if (my_trnlnm(elt, eltbuf, j++))
1202 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1205 if (s && klen == 4 && strEQ(key,"PATH")) {
1206 const char * const strend = s + len;
1208 while (s < strend) {
1212 #ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1213 const char path_sep = '|';
1215 const char path_sep = ':';
1217 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1218 s, strend, path_sep, &i);
1220 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
1222 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1224 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1226 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1227 MgTAINTEDDIR_on(mg);
1233 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1239 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1241 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
1242 PERL_UNUSED_ARG(sv);
1243 my_setenv(MgPV_nolen_const(mg),NULL);
1248 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1250 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
1251 PERL_UNUSED_ARG(mg);
1253 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1255 if (PL_localizing) {
1258 hv_iterinit(MUTABLE_HV(sv));
1259 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
1261 my_setenv(hv_iterkey(entry, &keylen),
1262 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
1270 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1272 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
1273 PERL_UNUSED_ARG(sv);
1274 PERL_UNUSED_ARG(mg);
1276 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1284 #ifdef HAS_SIGPROCMASK
1286 restore_sigmask(pTHX_ SV *save_sv)
1288 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
1289 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
1293 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1295 /* Are we fetching a signal entry? */
1296 int i = (I16)mg->mg_private;
1298 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1302 const char * sig = MgPV_const(mg, siglen);
1303 mg->mg_private = i = whichsig_pvn(sig, siglen);
1308 sv_setsv(sv,PL_psig_ptr[i]);
1310 Sighandler_t sigstate = rsignal_state(i);
1311 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1312 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1315 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1316 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1319 /* cache state so we don't fetch it again */
1320 if(sigstate == (Sighandler_t) SIG_IGN)
1321 sv_setpvs(sv,"IGNORE");
1323 sv_setsv(sv,&PL_sv_undef);
1324 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1331 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1333 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
1335 magic_setsig(NULL, mg);
1336 return sv_unmagic(sv, mg->mg_type);
1340 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1341 Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
1343 Perl_csighandler(int sig)
1346 #ifdef PERL_GET_SIG_CONTEXT
1347 dTHXa(PERL_GET_SIG_CONTEXT);
1351 #if defined(__cplusplus) && defined(__GNUC__)
1352 /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap
1353 * parameters would be warned about. */
1354 PERL_UNUSED_ARG(sip);
1355 PERL_UNUSED_ARG(uap);
1357 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1358 (void) rsignal(sig, PL_csighandlerp);
1359 if (PL_sig_ignoring[sig]) return;
1361 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1362 if (PL_sig_defaulting[sig])
1363 #ifdef KILL_BY_SIGPRC
1364 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1379 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
1380 /* Call the perl level handler now--
1381 * with risk we may be in malloc() or being destructed etc. */
1382 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1383 (*PL_sighandlerp)(sig, NULL, NULL);
1385 (*PL_sighandlerp)(sig);
1388 if (!PL_psig_pend) return;
1389 /* Set a flag to say this signal is pending, that is awaiting delivery after
1390 * the current Perl opcode completes */
1391 PL_psig_pend[sig]++;
1393 #ifndef SIG_PENDING_DIE_COUNT
1394 # define SIG_PENDING_DIE_COUNT 120
1396 /* Add one to say _a_ signal is pending */
1397 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1398 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1399 (unsigned long)SIG_PENDING_DIE_COUNT);
1403 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1405 Perl_csighandler_init(void)
1408 if (PL_sig_handlers_initted) return;
1410 for (sig = 1; sig < SIG_SIZE; sig++) {
1411 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1413 PL_sig_defaulting[sig] = 1;
1414 (void) rsignal(sig, PL_csighandlerp);
1416 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1417 PL_sig_ignoring[sig] = 0;
1420 PL_sig_handlers_initted = 1;
1424 #if defined HAS_SIGPROCMASK
1426 unblock_sigmask(pTHX_ void* newset)
1428 PERL_UNUSED_CONTEXT;
1429 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1434 Perl_despatch_signals(pTHX)
1438 for (sig = 1; sig < SIG_SIZE; sig++) {
1439 if (PL_psig_pend[sig]) {
1441 #ifdef HAS_SIGPROCMASK
1442 /* From sigaction(2) (FreeBSD man page):
1443 * | Signal routines normally execute with the signal that
1444 * | caused their invocation blocked, but other signals may
1446 * Emulation of this behavior (from within Perl) is enabled
1450 sigset_t newset, oldset;
1452 sigemptyset(&newset);
1453 sigaddset(&newset, sig);
1454 sigprocmask(SIG_BLOCK, &newset, &oldset);
1455 was_blocked = sigismember(&oldset, sig);
1457 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1459 SAVEFREESV(save_sv);
1460 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1463 PL_psig_pend[sig] = 0;
1464 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1465 (*PL_sighandlerp)(sig, NULL, NULL);
1467 (*PL_sighandlerp)(sig);
1469 #ifdef HAS_SIGPROCMASK
1478 /* sv of NULL signifies that we're acting as magic_clearsig. */
1480 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1485 /* Need to be careful with SvREFCNT_dec(), because that can have side
1486 * effects (due to closures). We must make sure that the new disposition
1487 * is in place before it is called.
1491 #ifdef HAS_SIGPROCMASK
1495 const char *s = MgPV_const(mg,len);
1497 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1500 if (memEQs(s, len, "__DIE__"))
1502 else if (memEQs(s, len, "__WARN__")
1503 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1504 /* Merge the existing behaviours, which are as follows:
1505 magic_setsig, we always set svp to &PL_warnhook
1506 (hence we always change the warnings handler)
1507 For magic_clearsig, we don't change the warnings handler if it's
1508 set to the &PL_warnhook. */
1511 SV *tmp = sv_newmortal();
1512 Perl_croak(aTHX_ "No such hook: %s",
1513 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1517 if (*svp != PERL_WARNHOOK_FATAL)
1523 i = (I16)mg->mg_private;
1525 i = whichsig_pvn(s, len); /* ...no, a brick */
1526 mg->mg_private = (U16)i;
1530 SV *tmp = sv_newmortal();
1531 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1532 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1536 #ifdef HAS_SIGPROCMASK
1537 /* Avoid having the signal arrive at a bad time, if possible. */
1540 sigprocmask(SIG_BLOCK, &set, &save);
1542 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
1543 SAVEFREESV(save_sv);
1544 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1547 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1548 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1550 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1551 PL_sig_ignoring[i] = 0;
1553 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1554 PL_sig_defaulting[i] = 0;
1556 to_dec = PL_psig_ptr[i];
1558 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1559 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1561 /* Signals don't change name during the program's execution, so once
1562 they're cached in the appropriate slot of PL_psig_name, they can
1565 Ideally we'd find some way of making SVs at (C) compile time, or
1566 at least, doing most of the work. */
1567 if (!PL_psig_name[i]) {
1568 PL_psig_name[i] = newSVpvn(s, len);
1569 SvREADONLY_on(PL_psig_name[i]);
1572 SvREFCNT_dec(PL_psig_name[i]);
1573 PL_psig_name[i] = NULL;
1574 PL_psig_ptr[i] = NULL;
1577 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
1579 (void)rsignal(i, PL_csighandlerp);
1582 *svp = SvREFCNT_inc_simple_NN(sv);
1584 if (sv && SvOK(sv)) {
1585 s = SvPV_force(sv, len);
1589 if (sv && memEQs(s, len,"IGNORE")) {
1591 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1592 PL_sig_ignoring[i] = 1;
1593 (void)rsignal(i, PL_csighandlerp);
1595 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1599 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
1601 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1602 PL_sig_defaulting[i] = 1;
1603 (void)rsignal(i, PL_csighandlerp);
1605 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1611 * We should warn if HINT_STRICT_REFS, but without
1612 * access to a known hint bit in a known OP, we can't
1613 * tell whether HINT_STRICT_REFS is in force or not.
1615 if (!strchr(s,':') && !strchr(s,'\''))
1616 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1619 (void)rsignal(i, PL_csighandlerp);
1621 *svp = SvREFCNT_inc_simple_NN(sv);
1625 #ifdef HAS_SIGPROCMASK
1629 SvREFCNT_dec(to_dec);
1632 #endif /* !PERL_MICRO */
1635 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1637 PERL_ARGS_ASSERT_MAGIC_SETISA;
1638 PERL_UNUSED_ARG(sv);
1640 /* Skip _isaelem because _isa will handle it shortly */
1641 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
1644 return magic_clearisa(NULL, mg);
1647 /* sv of NULL signifies that we're acting as magic_setisa. */
1649 Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1652 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1654 /* Bail out if destruction is going on */
1655 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
1658 av_clear(MUTABLE_AV(sv));
1660 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1661 /* This occurs with setisa_elem magic, which calls this
1663 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1666 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1667 SV **svp = AvARRAY((AV *)mg->mg_obj);
1668 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1670 stash = GvSTASH((GV *)*svp++);
1671 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1678 (const GV *)mg->mg_obj
1681 /* The stash may have been detached from the symbol table, so check its
1682 name before doing anything. */
1683 if (stash && HvENAME_get(stash))
1684 mro_isa_changed_in(stash);
1690 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1692 HV * const hv = MUTABLE_HV(LvTARG(sv));
1695 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
1696 PERL_UNUSED_ARG(mg);
1699 (void) hv_iterinit(hv);
1700 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1703 while (hv_iternext(hv))
1708 sv_setiv(sv, (IV)i);
1713 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1715 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
1716 PERL_UNUSED_ARG(mg);
1718 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
1724 =for apidoc magic_methcall
1726 Invoke a magic method (like FETCH).
1728 C<sv> and C<mg> are the tied thingy and the tie magic.
1730 C<meth> is the name of the method to call.
1732 C<argc> is the number of args (in addition to $self) to pass to the method.
1734 The C<flags> can be:
1736 G_DISCARD invoke method with G_DISCARD flag and don't
1738 G_UNDEF_FILL fill the stack with argc pointers to
1741 The arguments themselves are any values following the C<flags> argument.
1743 Returns the SV (if any) returned by the method, or NULL on failure.
1750 Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1756 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1760 if (flags & G_WRITING_TO_STDERR) {
1763 SAVESPTR(PL_stderrgv);
1767 PUSHSTACKi(PERLSI_MAGIC);
1771 PUSHs(SvTIED_obj(sv, mg));
1772 if (flags & G_UNDEF_FILL) {
1774 PUSHs(&PL_sv_undef);
1776 } else if (argc > 0) {
1778 va_start(args, argc);
1781 SV *const sv = va_arg(args, SV *);
1788 if (flags & G_DISCARD) {
1789 call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED);
1792 if (call_sv(meth, G_SCALAR|G_METHOD_NAMED))
1793 ret = *PL_stack_sp--;
1796 if (flags & G_WRITING_TO_STDERR)
1802 /* wrapper for magic_methcall that creates the first arg */
1805 S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1810 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1813 if (mg->mg_len >= 0) {
1814 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
1816 else if (mg->mg_len == HEf_SVKEY)
1817 arg1 = MUTABLE_SV(mg->mg_ptr);
1819 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1820 arg1 = newSViv((IV)(mg->mg_len));
1824 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
1826 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
1830 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth)
1834 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1836 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1843 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1845 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1847 if (mg->mg_type == PERL_MAGIC_tiedelem)
1848 mg->mg_flags |= MGf_GSKIP;
1849 magic_methpack(sv,mg,SV_CONST(FETCH));
1854 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1859 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1861 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1862 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1863 * public flags indicate its value based on copying from $val. Doing
1864 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1865 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1866 * wrong if $val happened to be tainted, as sv hasn't got magic
1867 * enabled, even though taint magic is in the chain. In which case,
1868 * fake up a temporary tainted value (this is easier than temporarily
1869 * re-enabling magic on sv). */
1871 if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint))
1872 && (tmg->mg_len & 1))
1874 val = sv_mortalcopy(sv);
1880 magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val);
1885 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1887 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1889 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
1890 return magic_methpack(sv,mg,SV_CONST(DELETE));
1895 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1900 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1902 retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL);
1904 retval = SvIV(retsv)-1;
1906 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
1908 return (U32) retval;
1912 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1914 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1916 Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0);
1921 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1925 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1927 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key)
1928 : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0);
1935 Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
1937 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1939 return magic_methpack(sv,mg,SV_CONST(EXISTS));
1943 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1946 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1947 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
1949 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1951 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1953 if (HvEITER_get(hv))
1954 /* we are in an iteration so the hash cannot be empty */
1956 /* no xhv_eiter so now use FIRSTKEY */
1957 key = sv_newmortal();
1958 magic_nextpack(MUTABLE_SV(hv), mg, key);
1959 HvEITER_set(hv, NULL); /* need to reset iterator */
1960 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1963 /* there is a SCALAR method that we can call */
1964 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0);
1966 retval = &PL_sv_undef;
1971 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1975 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
1977 /* The magic ptr/len for the debugger's hash should always be an SV. */
1978 if (UNLIKELY(mg->mg_len != HEf_SVKEY)) {
1979 Perl_croak(aTHX_ "panic: magic_setdbline len=%"IVdf", ptr='%s'",
1980 (IV)mg->mg_len, mg->mg_ptr);
1983 /* Use sv_2iv instead of SvIV() as the former generates smaller code, and
1984 setting/clearing debugger breakpoints is not a hot path. */
1985 svp = av_fetch(MUTABLE_AV(mg->mg_obj),
1986 sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE);
1988 if (svp && SvIOKp(*svp)) {
1989 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1991 #ifdef PERL_DEBUG_READONLY_OPS
1992 Slab_to_rw(OpSLAB(o));
1994 /* set or clear breakpoint in the relevant control op */
1996 o->op_flags |= OPf_SPECIAL;
1998 o->op_flags &= ~OPf_SPECIAL;
1999 #ifdef PERL_DEBUG_READONLY_OPS
2000 Slab_to_ro(OpSLAB(o));
2008 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
2010 AV * const obj = MUTABLE_AV(mg->mg_obj);
2012 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2015 sv_setiv(sv, AvFILL(obj));
2023 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
2025 AV * const obj = MUTABLE_AV(mg->mg_obj);
2027 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2030 av_fill(obj, SvIV(sv));
2032 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2033 "Attempt to set length of freed array");
2039 Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2041 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2042 PERL_UNUSED_ARG(sv);
2043 PERL_UNUSED_CONTEXT;
2045 /* Reset the iterator when the array is cleared */
2046 #if IVSIZE == I32SIZE
2047 *((IV *) &(mg->mg_len)) = 0;
2050 *((IV *) mg->mg_ptr) = 0;
2057 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2059 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
2060 PERL_UNUSED_ARG(sv);
2062 /* during global destruction, mg_obj may already have been freed */
2063 if (PL_in_clean_all)
2066 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2069 /* arylen scalar holds a pointer back to the array, but doesn't own a
2070 reference. Hence the we (the array) are about to go away with it
2071 still pointing at us. Clear its pointer, else it would be pointing
2072 at free memory. See the comment in sv_magic about reference loops,
2073 and why it can't own a reference to us. */
2080 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
2082 SV* const lsv = LvTARG(sv);
2083 MAGIC * const found = mg_find_mglob(lsv);
2085 PERL_ARGS_ASSERT_MAGIC_GETPOS;
2086 PERL_UNUSED_ARG(mg);
2088 if (found && found->mg_len != -1) {
2089 STRLEN i = found->mg_len;
2090 if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv))
2091 i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN);
2100 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
2102 SV* const lsv = LvTARG(sv);
2109 PERL_ARGS_ASSERT_MAGIC_SETPOS;
2110 PERL_UNUSED_ARG(mg);
2112 found = mg_find_mglob(lsv);
2116 found = sv_magicext_mglob(lsv);
2118 else if (!SvOK(sv)) {
2122 s = SvPV_const(lsv, len);
2127 ulen = sv_or_pv_len_utf8(lsv, s, len);
2137 else if (pos > (SSize_t)len)
2140 found->mg_len = pos;
2141 found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES);
2147 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
2150 SV * const lsv = LvTARG(sv);
2151 const char * const tmps = SvPV_const(lsv,len);
2152 STRLEN offs = LvTARGOFF(sv);
2153 STRLEN rem = LvTARGLEN(sv);
2154 const bool negoff = LvFLAGS(sv) & 1;
2155 const bool negrem = LvFLAGS(sv) & 2;
2157 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
2158 PERL_UNUSED_ARG(mg);
2160 if (!translate_substr_offsets(
2161 SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len,
2162 negoff ? -(IV)offs : (IV)offs, !negoff,
2163 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2165 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2166 sv_setsv_nomg(sv, &PL_sv_undef);
2171 offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem);
2172 sv_setpvn(sv, tmps + offs, rem);
2179 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
2181 STRLEN len, lsv_len, oldtarglen, newtarglen;
2182 const char * const tmps = SvPV_const(sv, len);
2183 SV * const lsv = LvTARG(sv);
2184 STRLEN lvoff = LvTARGOFF(sv);
2185 STRLEN lvlen = LvTARGLEN(sv);
2186 const bool negoff = LvFLAGS(sv) & 1;
2187 const bool neglen = LvFLAGS(sv) & 2;
2189 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
2190 PERL_UNUSED_ARG(mg);
2194 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2195 "Attempt to use reference as lvalue in substr"
2197 SvPV_force_nomg(lsv,lsv_len);
2198 if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv);
2199 if (!translate_substr_offsets(
2201 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2202 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2204 Perl_croak(aTHX_ "substr outside of string");
2207 sv_utf8_upgrade_nomg(lsv);
2208 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
2209 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
2210 newtarglen = sv_or_pv_len_utf8(sv, tmps, len);
2213 else if (SvUTF8(lsv)) {
2215 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
2217 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2218 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
2222 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
2225 if (!neglen) LvTARGLEN(sv) = newtarglen;
2226 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
2232 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
2234 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
2235 PERL_UNUSED_ARG(sv);
2236 #ifdef NO_TAINT_SUPPORT
2237 PERL_UNUSED_ARG(mg);
2240 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME);
2245 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
2247 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
2248 PERL_UNUSED_ARG(sv);
2250 /* update taint status */
2259 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
2261 SV * const lsv = LvTARG(sv);
2263 PERL_ARGS_ASSERT_MAGIC_GETVEC;
2264 PERL_UNUSED_ARG(mg);
2266 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2272 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
2274 PERL_ARGS_ASSERT_MAGIC_SETVEC;
2275 PERL_UNUSED_ARG(mg);
2276 do_vecset(sv); /* XXX slurp this routine */
2281 Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg)
2284 PERL_ARGS_ASSERT_DEFELEM_TARGET;
2285 if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem);
2287 if (LvTARGLEN(sv)) {
2289 SV * const ahv = LvTARG(sv);
2290 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
2294 else if (LvSTARGOFF(sv) >= 0) {
2295 AV *const av = MUTABLE_AV(LvTARG(sv));
2296 if (LvSTARGOFF(sv) <= AvFILL(av))
2298 if (SvRMAGICAL(av)) {
2299 SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0);
2300 targ = svp ? *svp : NULL;
2303 targ = AvARRAY(av)[LvSTARGOFF(sv)];
2306 if (targ && (targ != &PL_sv_undef)) {
2307 /* somebody else defined it for us */
2308 SvREFCNT_dec(LvTARG(sv));
2309 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2311 SvREFCNT_dec(mg->mg_obj);
2313 mg->mg_flags &= ~MGf_REFCOUNTED;
2322 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2324 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2326 sv_setsv(sv, defelem_target(sv, mg));
2331 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2333 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
2334 PERL_UNUSED_ARG(mg);
2338 sv_setsv(LvTARG(sv), sv);
2339 SvSETMAGIC(LvTARG(sv));
2345 Perl_vivify_defelem(pTHX_ SV *sv)
2350 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2352 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2355 SV * const ahv = LvTARG(sv);
2356 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
2359 if (!value || value == &PL_sv_undef)
2360 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
2362 else if (LvSTARGOFF(sv) < 0)
2363 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
2365 AV *const av = MUTABLE_AV(LvTARG(sv));
2366 if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av))
2367 LvTARG(sv) = NULL; /* array can't be extended */
2369 SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE);
2370 if (!svp || !(value = *svp))
2371 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
2374 SvREFCNT_inc_simple_void(value);
2375 SvREFCNT_dec(LvTARG(sv));
2378 SvREFCNT_dec(mg->mg_obj);
2380 mg->mg_flags &= ~MGf_REFCOUNTED;
2384 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2386 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
2387 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2392 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2394 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
2395 PERL_UNUSED_CONTEXT;
2396 PERL_UNUSED_ARG(sv);
2402 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2404 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2406 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2408 if (uf && uf->uf_set)
2409 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2414 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2416 const char type = mg->mg_type;
2418 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2420 if (type == PERL_MAGIC_qr) {
2421 } else if (type == PERL_MAGIC_bm) {
2425 assert(type == PERL_MAGIC_fm);
2427 return sv_unmagic(sv, type);
2430 #ifdef USE_LOCALE_COLLATE
2432 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2434 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2437 * RenE<eacute> Descartes said "I think not."
2438 * and vanished with a faint plop.
2440 PERL_UNUSED_CONTEXT;
2441 PERL_UNUSED_ARG(sv);
2443 Safefree(mg->mg_ptr);
2449 #endif /* USE_LOCALE_COLLATE */
2451 /* Just clear the UTF-8 cache data. */
2453 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2455 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
2456 PERL_UNUSED_CONTEXT;
2457 PERL_UNUSED_ARG(sv);
2458 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2460 mg->mg_len = -1; /* The mg_len holds the len cache. */
2465 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2477 PERL_ARGS_ASSERT_MAGIC_SET;
2481 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2483 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2485 /* Croak with a READONLY error when a numbered match var is
2486 * set without a previous pattern match. Unless it's C<local $1>
2489 if (!PL_localizing) {
2490 Perl_croak_no_modify();
2496 switch (*mg->mg_ptr) {
2497 case '\001': /* ^A */
2498 if (SvOK(sv)) sv_copypv(PL_bodytarget, sv);
2499 else SvOK_off(PL_bodytarget);
2500 FmLINES(PL_bodytarget) = 0;
2501 if (SvPOK(PL_bodytarget)) {
2502 char *s = SvPVX(PL_bodytarget);
2503 while ( ((s = strchr(s, '\n'))) ) {
2504 FmLINES(PL_bodytarget)++;
2508 /* mg_set() has temporarily made sv non-magical */
2510 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2511 SvTAINTED_on(PL_bodytarget);
2513 SvTAINTED_off(PL_bodytarget);
2516 case '\003': /* ^C */
2517 PL_minus_c = cBOOL(SvIV(sv));
2520 case '\004': /* ^D */
2522 s = SvPV_nolen_const(sv);
2523 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2524 if (DEBUG_x_TEST || DEBUG_B_TEST)
2525 dump_all_perl(!DEBUG_B_TEST);
2527 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2530 case '\005': /* ^E */
2531 if (*(mg->mg_ptr+1) == '\0') {
2533 set_vaxc_errno(SvIV(sv));
2536 SetLastError( SvIV(sv) );
2539 os2_setsyserrno(SvIV(sv));
2541 /* will anyone ever use this? */
2542 SETERRNO(SvIV(sv), 4);
2547 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2548 SvREFCNT_dec(PL_encoding);
2549 if (SvOK(sv) || SvGMAGICAL(sv)) {
2550 PL_encoding = newSVsv(sv);
2557 case '\006': /* ^F */
2558 PL_maxsysfd = SvIV(sv);
2560 case '\010': /* ^H */
2561 PL_hints = SvIV(sv);
2563 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2564 Safefree(PL_inplace);
2565 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2567 case '\016': /* ^N */
2568 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2569 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2571 case '\017': /* ^O */
2572 if (*(mg->mg_ptr+1) == '\0') {
2573 Safefree(PL_osname);
2576 TAINT_PROPER("assigning to $^O");
2577 PL_osname = savesvpv(sv);
2580 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2582 const char *const start = SvPV(sv, len);
2583 const char *out = (const char*)memchr(start, '\0', len);
2587 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2588 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2590 /* Opening for input is more common than opening for output, so
2591 ensure that hints for input are sooner on linked list. */
2592 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
2594 : newSVpvs_flags("", SvUTF8(sv));
2595 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2598 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2600 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2604 case '\020': /* ^P */
2605 PL_perldb = SvIV(sv);
2606 if (PL_perldb && !PL_DBsingle)
2609 case '\024': /* ^T */
2611 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2613 PL_basetime = (Time_t)SvIV(sv);
2616 case '\025': /* ^UTF8CACHE */
2617 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2618 PL_utf8cache = (signed char) sv_2iv(sv);
2621 case '\027': /* ^W & $^WARNING_BITS */
2622 if (*(mg->mg_ptr+1) == '\0') {
2623 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2625 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2626 | (i ? G_WARN_ON : G_WARN_OFF) ;
2629 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2630 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2632 PL_compiling.cop_warnings = pWARN_STD;
2637 int accumulate = 0 ;
2638 int any_fatals = 0 ;
2639 const char * const ptr = SvPV_const(sv, len) ;
2640 for (i = 0 ; i < len ; ++i) {
2641 accumulate |= ptr[i] ;
2642 any_fatals |= (ptr[i] & 0xAA) ;
2645 if (!specialWARN(PL_compiling.cop_warnings))
2646 PerlMemShared_free(PL_compiling.cop_warnings);
2647 PL_compiling.cop_warnings = pWARN_NONE;
2649 /* Yuck. I can't see how to abstract this: */
2651 ((STRLEN *)SvPV_nolen_const(sv)) - 1,
2655 if (!specialWARN(PL_compiling.cop_warnings))
2656 PerlMemShared_free(PL_compiling.cop_warnings);
2657 PL_compiling.cop_warnings = pWARN_ALL;
2658 PL_dowarn |= G_WARN_ONCE ;
2662 const char *const p = SvPV_const(sv, len);
2664 PL_compiling.cop_warnings
2665 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2668 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2669 PL_dowarn |= G_WARN_ONCE ;
2677 if (PL_localizing) {
2678 if (PL_localizing == 1)
2679 SAVESPTR(PL_last_in_gv);
2681 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2682 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2685 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2686 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2687 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2690 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2691 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2692 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2695 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2698 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2699 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2700 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2703 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2707 IO * const io = GvIO(PL_defoutgv);
2710 if ((SvIV(sv)) == 0)
2711 IoFLAGS(io) &= ~IOf_FLUSH;
2713 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2714 PerlIO *ofp = IoOFP(io);
2716 (void)PerlIO_flush(ofp);
2717 IoFLAGS(io) |= IOf_FLUSH;
2726 SV *referent= SvRV(sv);
2727 const char *reftype= sv_reftype(referent, 0);
2728 /* XXX: dodgy type check: This leaves me feeling dirty, but the alternative
2729 * is to copy pretty much the entire sv_reftype() into this routine, or to do
2730 * a full string comparison on the return of sv_reftype() both of which
2731 * make me feel worse! NOTE, do not modify this comment without reviewing the
2732 * corresponding comment in sv_reftype(). - Yves */
2733 if (reftype[0] == 'S' || reftype[0] == 'L') {
2734 IV val= SvIV(referent);
2736 tmpsv= &PL_sv_undef;
2737 Perl_ck_warner(aTHX_ packWARN(WARN_DEPRECATED),
2738 "Setting $/ to a reference to %s as a form of slurp is deprecated, treating as undef",
2739 SvIV(SvRV(sv)) < 0 ? "a negative integer" : "zero"
2743 /* diag_listed_as: Setting $/ to %s reference is forbidden */
2744 Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden",
2745 *reftype == 'A' ? "n" : "", reftype);
2748 SvREFCNT_dec(PL_rs);
2749 PL_rs = newSVsv(tmpsv);
2753 SvREFCNT_dec(PL_ors_sv);
2755 PL_ors_sv = newSVsv(sv);
2763 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2766 #ifdef COMPLEX_STATUS
2767 if (PL_localizing == 2) {
2768 SvUPGRADE(sv, SVt_PVLV);
2769 PL_statusvalue = LvTARGOFF(sv);
2770 PL_statusvalue_vms = LvTARGLEN(sv);
2774 #ifdef VMSISH_STATUS
2776 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2779 STATUS_UNIX_EXIT_SET(SvIV(sv));
2784 # define PERL_VMS_BANG vaxc$errno
2786 # define PERL_VMS_BANG 0
2788 #if defined(WIN32) && ! defined(UNDER_CE)
2789 SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0),
2790 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2792 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2793 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2799 /* XXX $< currently silently ignores failures */
2800 const Uid_t new_uid = SvUID(sv);
2801 PL_delaymagic_uid = new_uid;
2802 if (PL_delaymagic) {
2803 PL_delaymagic |= DM_RUID;
2804 break; /* don't do magic till later */
2807 PERL_UNUSED_RESULT(setruid(new_uid));
2810 PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1));
2812 #ifdef HAS_SETRESUID
2813 PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1));
2815 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
2817 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2818 if (new_uid != 0 && PerlProc_getuid() == 0)
2819 PERL_UNUSED_RESULT(PerlProc_setuid(0));
2821 PERL_UNUSED_RESULT(PerlProc_setuid(new_uid));
2823 Perl_croak(aTHX_ "setruid() not implemented");
2832 /* XXX $> currently silently ignores failures */
2833 const Uid_t new_euid = SvUID(sv);
2834 PL_delaymagic_euid = new_euid;
2835 if (PL_delaymagic) {
2836 PL_delaymagic |= DM_EUID;
2837 break; /* don't do magic till later */
2840 PERL_UNUSED_RESULT(seteuid(new_euid));
2843 PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid));
2845 #ifdef HAS_SETRESUID
2846 PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1));
2848 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
2849 PERL_UNUSED_RESULT(PerlProc_setuid(new_euid));
2851 Perl_croak(aTHX_ "seteuid() not implemented");
2860 /* XXX $( currently silently ignores failures */
2861 const Gid_t new_gid = SvGID(sv);
2862 PL_delaymagic_gid = new_gid;
2863 if (PL_delaymagic) {
2864 PL_delaymagic |= DM_RGID;
2865 break; /* don't do magic till later */
2868 PERL_UNUSED_RESULT(setrgid(new_gid));
2871 PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1));
2873 #ifdef HAS_SETRESGID
2874 PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1));
2876 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2877 PERL_UNUSED_RESULT(PerlProc_setgid(new_gid));
2879 Perl_croak(aTHX_ "setrgid() not implemented");
2888 /* XXX $) currently silently ignores failures */
2890 #ifdef HAS_SETGROUPS
2892 const char *p = SvPV_const(sv, len);
2893 Groups_t *gary = NULL;
2895 #ifdef _SC_NGROUPS_MAX
2896 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2901 int maxgrp = NGROUPS;
2906 new_egid = (Gid_t)grok_atou(p, &endptr);
2907 for (i = 0; i < maxgrp; ++i) {
2916 Newx(gary, i + 1, Groups_t);
2918 Renew(gary, i + 1, Groups_t);
2919 gary[i] = (Groups_t)grok_atou(p, &endptr);
2922 PERL_UNUSED_RESULT(setgroups(i, gary));
2925 #else /* HAS_SETGROUPS */
2926 new_egid = SvGID(sv);
2927 #endif /* HAS_SETGROUPS */
2928 PL_delaymagic_egid = new_egid;
2929 if (PL_delaymagic) {
2930 PL_delaymagic |= DM_EGID;
2931 break; /* don't do magic till later */
2934 PERL_UNUSED_RESULT(setegid(new_egid));
2937 PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid));
2939 #ifdef HAS_SETRESGID
2940 PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1));
2942 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2943 PERL_UNUSED_RESULT(PerlProc_setgid(new_egid));
2945 Perl_croak(aTHX_ "setegid() not implemented");
2953 PL_chopset = SvPV_force(sv,len);
2956 /* Store the pid in mg->mg_obj so we can tell when a fork has
2957 occurred. mg->mg_obj points to *$ by default, so clear it. */
2958 if (isGV(mg->mg_obj)) {
2959 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2960 SvREFCNT_dec(mg->mg_obj);
2961 mg->mg_flags |= MGf_REFCOUNTED;
2962 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2964 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2967 LOCK_DOLLARZERO_MUTEX;
2968 #ifdef HAS_SETPROCTITLE
2969 /* The BSDs don't show the argv[] in ps(1) output, they
2970 * show a string from the process struct and provide
2971 * the setproctitle() routine to manipulate that. */
2972 if (PL_origalen != 1) {
2973 s = SvPV_const(sv, len);
2974 # if __FreeBSD_version > 410001
2975 /* The leading "-" removes the "perl: " prefix,
2976 * but not the "(perl) suffix from the ps(1)
2977 * output, because that's what ps(1) shows if the
2978 * argv[] is modified. */
2979 setproctitle("-%s", s);
2980 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2981 /* This doesn't really work if you assume that
2982 * $0 = 'foobar'; will wipe out 'perl' from the $0
2983 * because in ps(1) output the result will be like
2984 * sprintf("perl: %s (perl)", s)
2985 * I guess this is a security feature:
2986 * one (a user process) cannot get rid of the original name.
2988 setproctitle("%s", s);
2991 #elif defined(__hpux) && defined(PSTAT_SETCMD)
2992 if (PL_origalen != 1) {
2994 s = SvPV_const(sv, len);
2995 un.pst_command = (char *)s;
2996 pstat(PSTAT_SETCMD, un, len, 0, 0);
2999 if (PL_origalen > 1) {
3000 /* PL_origalen is set in perl_parse(). */
3001 s = SvPV_force(sv,len);
3002 if (len >= (STRLEN)PL_origalen-1) {
3003 /* Longer than original, will be truncated. We assume that
3004 * PL_origalen bytes are available. */
3005 Copy(s, PL_origargv[0], PL_origalen-1, char);
3008 /* Shorter than original, will be padded. */
3010 /* Special case for Mac OS X: see [perl #38868] */
3013 /* Is the space counterintuitive? Yes.
3014 * (You were expecting \0?)
3015 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3017 const int pad = ' ';
3019 Copy(s, PL_origargv[0], len, char);
3020 PL_origargv[0][len] = 0;
3021 memset(PL_origargv[0] + len + 1,
3022 pad, PL_origalen - len - 1);
3024 PL_origargv[0][PL_origalen-1] = 0;
3025 for (i = 1; i < PL_origargc; i++)
3027 #ifdef HAS_PRCTL_SET_NAME
3028 /* Set the legacy process name in addition to the POSIX name on Linux */
3029 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3030 /* diag_listed_as: SKIPME */
3031 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3036 UNLOCK_DOLLARZERO_MUTEX;
3043 Perl_whichsig_sv(pTHX_ SV *sigsv)
3047 PERL_ARGS_ASSERT_WHICHSIG_SV;
3048 sigpv = SvPV_const(sigsv, siglen);
3049 return whichsig_pvn(sigpv, siglen);
3053 Perl_whichsig_pv(pTHX_ const char *sig)
3055 PERL_ARGS_ASSERT_WHICHSIG_PV;
3056 return whichsig_pvn(sig, strlen(sig));
3060 Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
3064 PERL_ARGS_ASSERT_WHICHSIG_PVN;
3065 PERL_UNUSED_CONTEXT;
3067 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
3068 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
3069 return PL_sig_num[sigv - (char* const*)PL_sig_name];
3071 if (memEQs(sig, len, "CHLD"))
3075 if (memEQs(sig, len, "CLD"))
3082 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3083 Perl_sighandler(int sig, siginfo_t *sip, void *uap)
3085 Perl_sighandler(int sig)
3088 #ifdef PERL_GET_SIG_CONTEXT
3089 dTHXa(PERL_GET_SIG_CONTEXT);
3096 SV * const tSv = PL_Sv;
3100 XPV * const tXpv = PL_Xpv;
3101 I32 old_ss_ix = PL_savestack_ix;
3102 SV *errsv_save = NULL;
3105 if (!PL_psig_ptr[sig]) {
3106 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
3111 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3112 /* Max number of items pushed there is 3*n or 4. We cannot fix
3113 infinity, so we fix 4 (in fact 5): */
3114 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3116 PL_savestack_ix += 5; /* Protect save in progress. */
3117 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3120 /* sv_2cv is too complicated, try a simpler variant first: */
3121 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
3122 || SvTYPE(cv) != SVt_PVCV) {
3124 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
3127 if (!cv || !CvROOT(cv)) {
3128 const HEK * const hek = gv
3132 : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL;
3134 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
3135 "SIG%s handler \"%"HEKf"\" not defined.\n",
3136 PL_sig_name[sig], hek);
3137 /* diag_listed_as: SIG%s handler "%s" not defined */
3138 else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
3139 "SIG%s handler \"__ANON__\" not defined.\n",
3144 sv = PL_psig_name[sig]
3145 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3146 : newSVpv(PL_sig_name[sig],0);
3150 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3151 /* make sure our assumption about the size of the SAVEs are correct:
3152 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3153 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3156 PUSHSTACKi(PERLSI_SIGNAL);
3159 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3161 struct sigaction oact;
3163 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
3166 SV *rv = newRV_noinc(MUTABLE_SV(sih));
3167 /* The siginfo fields signo, code, errno, pid, uid,
3168 * addr, status, and band are defined by POSIX/SUSv3. */
3169 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3170 (void)hv_stores(sih, "code", newSViv(sip->si_code));
3171 #if 0 /* XXX TODO: Configure scan for the existence of these, but even that does not help if the SA_SIGINFO is not implemented according to the spec. */
3172 hv_stores(sih, "errno", newSViv(sip->si_errno));
3173 hv_stores(sih, "status", newSViv(sip->si_status));
3174 hv_stores(sih, "uid", newSViv(sip->si_uid));
3175 hv_stores(sih, "pid", newSViv(sip->si_pid));
3176 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3177 hv_stores(sih, "band", newSViv(sip->si_band));
3181 mPUSHp((char *)sip, sizeof(*sip));
3189 errsv_save = newSVsv(ERRSV);
3191 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
3195 SV * const errsv = ERRSV;
3196 if (SvTRUE_NN(errsv)) {
3197 SvREFCNT_dec(errsv_save);
3199 /* Handler "died", for example to get out of a restart-able read().
3200 * Before we re-do that on its behalf re-enable the signal which was
3201 * blocked by the system when we entered.
3203 #ifdef HAS_SIGPROCMASK
3204 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3210 sigaddset(&set,sig);
3211 sigprocmask(SIG_UNBLOCK, &set, NULL);
3214 /* Not clear if this will work */
3215 (void)rsignal(sig, SIG_IGN);
3216 (void)rsignal(sig, PL_csighandlerp);
3218 #endif /* !PERL_MICRO */
3222 sv_setsv(errsv, errsv_save);
3223 SvREFCNT_dec(errsv_save);
3228 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3229 PL_savestack_ix = old_ss_ix;
3231 SvREFCNT_dec_NN(sv);
3232 PL_op = myop; /* Apparently not needed... */
3234 PL_Sv = tSv; /* Restore global temporaries. */
3241 S_restore_magic(pTHX_ const void *p)
3243 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3244 SV* const sv = mgs->mgs_sv;
3250 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3251 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
3252 #ifdef PERL_OLD_COPY_ON_WRITE
3253 /* While magic was saved (and off) sv_setsv may well have seen
3254 this SV as a prime candidate for COW. */
3256 sv_force_normal_flags(sv, 0);
3259 SvFLAGS(sv) |= mgs->mgs_flags;
3264 bumped = mgs->mgs_bumped;
3265 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3267 /* If we're still on top of the stack, pop us off. (That condition
3268 * will be satisfied if restore_magic was called explicitly, but *not*
3269 * if it's being called via leave_scope.)
3270 * The reason for doing this is that otherwise, things like sv_2cv()
3271 * may leave alloc gunk on the savestack, and some code
3272 * (e.g. sighandler) doesn't expect that...
3274 if (PL_savestack_ix == mgs->mgs_ss_ix)
3276 UV popval = SSPOPUV;
3277 assert(popval == SAVEt_DESTRUCTOR_X);
3278 PL_savestack_ix -= 2;
3280 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3281 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
3284 if (SvREFCNT(sv) == 1) {
3285 /* We hold the last reference to this SV, which implies that the
3286 SV was deleted as a side effect of the routines we called.
3287 So artificially keep it alive a bit longer.
3288 We avoid turning on the TEMP flag, which can cause the SV's
3289 buffer to get stolen (and maybe other stuff). */
3294 SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */
3298 /* clean up the mess created by Perl_sighandler().
3299 * Note that this is only called during an exit in a signal handler;
3300 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
3304 S_unwind_handler_stack(pTHX_ const void *p)
3308 PL_savestack_ix -= 5; /* Unprotect save in progress. */
3312 =for apidoc magic_sethint
3314 Triggered by a store to %^H, records the key/value pair to
3315 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3316 anything that would need a deep copy. Maybe we should warn if we find a
3322 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3324 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
3325 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
3327 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3329 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3330 an alternative leaf in there, with PL_compiling.cop_hints being used if
3331 it's NULL. If needed for threads, the alternative could lock a mutex,
3332 or take other more complex action. */
3334 /* Something changed in %^H, so it will need to be restored on scope exit.
3335 Doing this here saves a lot of doing it manually in perl code (and
3336 forgetting to do it, and consequent subtle errors. */
3337 PL_hints |= HINT_LOCALIZE_HH;
3338 CopHINTHASH_set(&PL_compiling,
3339 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
3344 =for apidoc magic_clearhint
3346 Triggered by a delete from %^H, records the key to
3347 C<PL_compiling.cop_hints_hash>.
3352 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3354 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
3355 PERL_UNUSED_ARG(sv);
3357 PL_hints |= HINT_LOCALIZE_HH;
3358 CopHINTHASH_set(&PL_compiling,
3359 mg->mg_len == HEf_SVKEY
3360 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3361 MUTABLE_SV(mg->mg_ptr), 0, 0)
3362 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3363 mg->mg_ptr, mg->mg_len, 0, 0));
3368 =for apidoc magic_clearhints
3370 Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3375 Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3377 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3378 PERL_UNUSED_ARG(sv);
3379 PERL_UNUSED_ARG(mg);
3380 cophh_free(CopHINTHASH_get(&PL_compiling));
3381 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
3386 Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3387 const char *name, I32 namlen)
3391 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
3392 PERL_UNUSED_ARG(sv);
3393 PERL_UNUSED_ARG(name);
3394 PERL_UNUSED_ARG(namlen);
3396 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3397 nmg = mg_find(nsv, mg->mg_type);
3399 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3400 nmg->mg_ptr = mg->mg_ptr;
3401 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3402 nmg->mg_flags |= MGf_REFCOUNTED;
3408 * c-indentation-style: bsd
3410 * indent-tabs-mode: nil
3413 * ex: set ts=8 sts=4 sw=4 et: