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.
91 /* MGS is typedef'ed to struct magic_state in perl.h */
94 S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags)
99 PERL_ARGS_ASSERT_SAVE_MAGIC_FLAGS;
101 assert(SvMAGICAL(sv));
103 /* we shouldn't really be called here with RC==0, but it can sometimes
104 * happen via mg_clear() (which also shouldn't be called when RC==0,
105 * but it can happen). Handle this case gracefully(ish) by not RC++
106 * and thus avoiding the resultant double free */
107 if (SvREFCNT(sv) > 0) {
108 /* guard against sv getting freed midway through the mg clearing,
109 * by holding a private reference for the duration. */
110 SvREFCNT_inc_simple_void_NN(sv);
114 SAVEDESTRUCTOR_X(S_restore_magic, INT2PTR(void*, (IV)mgs_ix));
116 mgs = SSPTR(mgs_ix, MGS*);
118 mgs->mgs_magical = SvMAGICAL(sv);
119 mgs->mgs_readonly = SvREADONLY(sv) != 0;
120 mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
121 mgs->mgs_bumped = bumped;
123 SvFLAGS(sv) &= ~flags;
127 #define save_magic(a,b) save_magic_flags(a,b,SVs_GMG|SVs_SMG|SVs_RMG)
130 =for apidoc mg_magical
132 Turns on the magical status of an SV. See C<sv_magic>.
138 Perl_mg_magical(SV *sv)
141 PERL_ARGS_ASSERT_MG_MAGICAL;
144 if ((mg = SvMAGIC(sv))) {
146 const MGVTBL* const vtbl = mg->mg_virtual;
148 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
155 } while ((mg = mg->mg_moremagic));
156 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
164 Do magic before a value is retrieved from the SV. The type of SV must
165 be >= SVt_PVMG. See C<sv_magic>.
171 Perl_mg_get(pTHX_ SV *sv)
173 const I32 mgs_ix = SSNEW(sizeof(MGS));
176 MAGIC *newmg, *head, *cur, *mg;
178 PERL_ARGS_ASSERT_MG_GET;
180 if (PL_localizing == 1 && sv == DEFSV) return 0;
182 /* We must call svt_get(sv, mg) for each valid entry in the linked
183 list of magic. svt_get() may delete the current entry, add new
184 magic to the head of the list, or upgrade the SV. AMS 20010810 */
186 newmg = cur = head = mg = SvMAGIC(sv);
188 const MGVTBL * const vtbl = mg->mg_virtual;
189 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
191 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
193 /* taint's mg get is so dumb it doesn't need flag saving */
194 if (!saved && mg->mg_type != PERL_MAGIC_taint) {
195 save_magic(mgs_ix, sv);
199 vtbl->svt_get(aTHX_ sv, mg);
201 /* guard against magic having been deleted - eg FETCH calling
204 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
208 /* recalculate flags if this entry was deleted. */
209 if (mg->mg_flags & MGf_GSKIP)
210 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
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 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
239 restore_magic(INT2PTR(void *, (IV)mgs_ix));
247 Do magic after a value is assigned to the SV. See C<sv_magic>.
253 Perl_mg_set(pTHX_ SV *sv)
255 const I32 mgs_ix = SSNEW(sizeof(MGS));
259 PERL_ARGS_ASSERT_MG_SET;
261 if (PL_localizing == 2 && sv == DEFSV) return 0;
263 save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */
265 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
266 const MGVTBL* vtbl = mg->mg_virtual;
267 nextmg = mg->mg_moremagic; /* it may delete itself */
268 if (mg->mg_flags & MGf_GSKIP) {
269 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
270 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
272 if (PL_localizing == 2
273 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
275 if (vtbl && vtbl->svt_set)
276 vtbl->svt_set(aTHX_ sv, mg);
279 restore_magic(INT2PTR(void*, (IV)mgs_ix));
284 =for apidoc mg_length
286 Reports on the SV's length in bytes, calling length magic if available,
287 but does not set the UTF8 flag on the sv. It will fall back to 'get'
288 magic if there is no 'length' magic, but with no indication as to
289 whether it called 'get' magic. It assumes the sv is a PVMG or
290 higher. Use sv_len() instead.
296 Perl_mg_length(pTHX_ SV *sv)
301 PERL_ARGS_ASSERT_MG_LENGTH;
303 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
304 const MGVTBL * const vtbl = mg->mg_virtual;
305 if (vtbl && vtbl->svt_len) {
306 const I32 mgs_ix = SSNEW(sizeof(MGS));
307 save_magic(mgs_ix, sv);
308 /* omit MGf_GSKIP -- not changed here */
309 len = vtbl->svt_len(aTHX_ sv, mg);
310 restore_magic(INT2PTR(void*, (IV)mgs_ix));
315 (void)SvPV_const(sv, len);
320 Perl_mg_size(pTHX_ SV *sv)
324 PERL_ARGS_ASSERT_MG_SIZE;
326 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
327 const MGVTBL* const vtbl = mg->mg_virtual;
328 if (vtbl && vtbl->svt_len) {
329 const I32 mgs_ix = SSNEW(sizeof(MGS));
331 save_magic(mgs_ix, sv);
332 /* omit MGf_GSKIP -- not changed here */
333 len = vtbl->svt_len(aTHX_ sv, mg);
334 restore_magic(INT2PTR(void*, (IV)mgs_ix));
341 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
345 Perl_croak(aTHX_ "Size magic not implemented");
348 NOT_REACHED; /* NOTREACHED */
354 Clear something magical that the SV represents. See C<sv_magic>.
360 Perl_mg_clear(pTHX_ SV *sv)
362 const I32 mgs_ix = SSNEW(sizeof(MGS));
366 PERL_ARGS_ASSERT_MG_CLEAR;
368 save_magic(mgs_ix, sv);
370 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
371 const MGVTBL* const vtbl = mg->mg_virtual;
372 /* omit GSKIP -- never set here */
374 nextmg = mg->mg_moremagic; /* it may delete itself */
376 if (vtbl && vtbl->svt_clear)
377 vtbl->svt_clear(aTHX_ sv, mg);
380 restore_magic(INT2PTR(void*, (IV)mgs_ix));
385 S_mg_findext_flags(const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
392 assert(!(SvTYPE(sv) == SVt_PVAV && AvPAD_NAMELIST(sv)));
394 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
395 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
407 Finds the magic pointer for type matching the SV. See C<sv_magic>.
413 Perl_mg_find(const SV *sv, int type)
415 return S_mg_findext_flags(sv, type, NULL, 0);
419 =for apidoc mg_findext
421 Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
428 Perl_mg_findext(const SV *sv, int type, const MGVTBL *vtbl)
430 return S_mg_findext_flags(sv, type, vtbl, 1);
434 Perl_mg_find_mglob(pTHX_ SV *sv)
436 PERL_ARGS_ASSERT_MG_FIND_MGLOB;
437 if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') {
438 /* This sv is only a delegate. //g magic must be attached to
443 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
444 return S_mg_findext_flags(sv, PERL_MAGIC_regex_global, 0, 0);
451 Copies the magic from one SV to another. See C<sv_magic>.
457 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
462 PERL_ARGS_ASSERT_MG_COPY;
464 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
465 const MGVTBL* const vtbl = mg->mg_virtual;
466 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
467 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
470 const char type = mg->mg_type;
471 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
473 (type == PERL_MAGIC_tied)
475 : (type == PERL_MAGIC_regdata && mg->mg_obj)
478 toLOWER(type), key, klen);
487 =for apidoc mg_localize
489 Copy some of the magic from an existing SV to new localized version of that
490 SV. Container magic (eg %ENV, $1, tie)
491 gets copied, value magic doesn't (eg
494 If setmagic is false then no set magic will be called on the new (empty) SV.
495 This typically means that assignment will soon follow (e.g. 'local $x = $y'),
496 and that will handle the magic.
502 Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
506 PERL_ARGS_ASSERT_MG_LOCALIZE;
511 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
512 const MGVTBL* const vtbl = mg->mg_virtual;
513 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
516 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
517 (void)vtbl->svt_local(aTHX_ nsv, mg);
519 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
520 mg->mg_ptr, mg->mg_len);
522 /* container types should remain read-only across localization */
523 SvFLAGS(nsv) |= SvREADONLY(sv);
526 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
527 SvFLAGS(nsv) |= SvMAGICAL(sv);
536 #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
538 S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
540 const MGVTBL* const vtbl = mg->mg_virtual;
541 if (vtbl && vtbl->svt_free)
542 vtbl->svt_free(aTHX_ sv, mg);
543 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
544 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
545 Safefree(mg->mg_ptr);
546 else if (mg->mg_len == HEf_SVKEY)
547 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
549 if (mg->mg_flags & MGf_REFCOUNTED)
550 SvREFCNT_dec(mg->mg_obj);
557 Free any magic storage used by the SV. See C<sv_magic>.
563 Perl_mg_free(pTHX_ SV *sv)
568 PERL_ARGS_ASSERT_MG_FREE;
570 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
571 moremagic = mg->mg_moremagic;
572 mg_free_struct(sv, mg);
573 SvMAGIC_set(sv, moremagic);
575 SvMAGIC_set(sv, NULL);
581 =for apidoc Am|void|mg_free_type|SV *sv|int how
583 Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
589 Perl_mg_free_type(pTHX_ SV *sv, int how)
591 MAGIC *mg, *prevmg, *moremg;
592 PERL_ARGS_ASSERT_MG_FREE_TYPE;
593 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
595 moremg = mg->mg_moremagic;
596 if (mg->mg_type == how) {
597 /* temporarily move to the head of the magic chain, in case
598 custom free code relies on this historical aspect of mg_free */
600 prevmg->mg_moremagic = moremg;
601 mg->mg_moremagic = SvMAGIC(sv);
604 newhead = mg->mg_moremagic;
605 mg_free_struct(sv, mg);
606 SvMAGIC_set(sv, newhead);
616 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
620 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
623 const REGEXP * const rx = PM_GETRE(PL_curpm);
625 if (mg->mg_obj) { /* @+ */
626 /* return the number possible */
627 return RX_NPARENS(rx);
629 I32 paren = RX_LASTPAREN(rx);
631 /* return the last filled */
633 && (RX_OFFS(rx)[paren].start == -1
634 || RX_OFFS(rx)[paren].end == -1) )
647 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
649 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
652 const REGEXP * const rx = PM_GETRE(PL_curpm);
654 const I32 paren = mg->mg_len;
659 if (paren <= (I32)RX_NPARENS(rx) &&
660 (s = RX_OFFS(rx)[paren].start) != -1 &&
661 (t = RX_OFFS(rx)[paren].end) != -1)
664 if (mg->mg_obj) /* @+ */
669 if (RX_MATCH_UTF8(rx)) {
670 const char * const b = RX_SUBBEG(rx);
672 i = RX_SUBCOFFSET(rx) +
674 (U8*)(b-RX_SUBOFFSET(rx)+i));
689 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
691 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
695 Perl_croak_no_modify();
696 NORETURN_FUNCTION_END;
699 #define SvRTRIM(sv) STMT_START { \
701 STRLEN len = SvCUR(sv); \
702 char * const p = SvPVX(sv); \
703 while (len > 0 && isSPACE(p[len-1])) \
705 SvCUR_set(sv, len); \
711 Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
713 PERL_ARGS_ASSERT_EMULATE_COP_IO;
715 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
716 sv_setsv(sv, &PL_sv_undef);
720 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
721 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
726 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
727 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
735 S_fixup_errno_string(pTHX_ SV* sv)
737 /* Do what is necessary to fixup the non-empty string in 'sv' for return to
740 PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING;
744 if(strEQ(SvPVX(sv), "")) {
745 sv_catpv(sv, UNKNOWN_ERRNO_MSG);
749 /* In some locales the error string may come back as UTF-8, in which
750 * case we should turn on that flag. This didn't use to happen, and to
751 * avoid as many possible backward compatibility issues as possible, we
752 * don't turn on the flag unless we have to. So the flag stays off for
753 * an entirely ASCII string. We assume that if the string looks like
754 * UTF-8, it really is UTF-8: "text in any other encoding that uses
755 * bytes with the high bit set is extremely unlikely to pass a UTF-8
756 * validity test" (http://en.wikipedia.org/wiki/Charset_detection).
757 * There is a potential that we will get it wrong however, especially
758 * on short error message text. (If it turns out to be necessary, we
759 * could also keep track if the current LC_MESSAGES locale is UTF-8) */
760 if (! IN_BYTES /* respect 'use bytes' */
761 && ! is_ascii_string((U8*) SvPVX_const(sv), SvCUR(sv))
762 && is_utf8_string((U8*) SvPVX_const(sv), SvCUR(sv)))
775 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
778 const char *s = NULL;
780 const char * const remaining = mg->mg_ptr + 1;
783 PERL_ARGS_ASSERT_MAGIC_GET;
787 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
789 CALLREG_NUMBUF_FETCH(rx,paren,sv);
791 sv_setsv(sv,&PL_sv_undef);
796 nextchar = *remaining;
797 switch (*mg->mg_ptr) {
798 case '\001': /* ^A */
799 if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget);
800 else sv_setsv(sv, &PL_sv_undef);
801 if (SvTAINTED(PL_bodytarget))
804 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
805 if (nextchar == '\0') {
806 sv_setiv(sv, (IV)PL_minus_c);
808 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
809 sv_setiv(sv, (IV)STATUS_NATIVE);
813 case '\004': /* ^D */
814 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
816 case '\005': /* ^E */
817 if (nextchar != '\0') {
818 if (strEQ(remaining, "NCODING"))
819 sv_setsv(sv, PL_encoding);
823 #if defined(VMS) || defined(OS2) || defined(WIN32)
827 $DESCRIPTOR(msgdsc,msg);
828 sv_setnv(sv,(NV) vaxc$errno);
829 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
830 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
835 if (!(_emx_env & 0x200)) { /* Under DOS */
836 sv_setnv(sv, (NV)errno);
837 sv_setpv(sv, errno ? my_strerror(errno) : "");
839 if (errno != errno_isOS2) {
840 const int tmp = _syserrno();
841 if (tmp) /* 2nd call to _syserrno() makes it 0 */
844 sv_setnv(sv, (NV)Perl_rc);
845 sv_setpv(sv, os2error(Perl_rc));
847 if (SvOK(sv) && strNE(SvPVX(sv), "")) {
848 fixup_errno_string(sv);
850 # elif defined(WIN32)
852 const DWORD dwErr = GetLastError();
853 sv_setnv(sv, (NV)dwErr);
855 PerlProc_GetOSError(sv, dwErr);
856 fixup_errno_string(sv);
863 # error Missing code for platform
866 SvNOK_on(sv); /* what a wonderful hack! */
868 #endif /* End of platforms with special handling for $^E; others just fall
875 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
877 sv_setnv(sv, (NV)errno);
880 if (errno == errno_isOS2 || errno == errno_isOS2_set)
881 sv_setpv(sv, os2error(Perl_rc));
889 /* Strerror can return NULL on some platforms, which will
890 * result in 'sv' not being considered SvOK. The SvNOK_on()
891 * below will cause just the number part to be valid */
892 sv_setpv(sv, my_strerror(errno));
894 fixup_errno_string(sv);
901 SvNOK_on(sv); /* what a wonderful hack! */
904 case '\006': /* ^F */
905 sv_setiv(sv, (IV)PL_maxsysfd);
907 case '\007': /* ^GLOBAL_PHASE */
908 if (strEQ(remaining, "LOBAL_PHASE")) {
909 sv_setpvn(sv, PL_phase_names[PL_phase],
910 strlen(PL_phase_names[PL_phase]));
913 case '\010': /* ^H */
914 sv_setiv(sv, (IV)PL_hints);
916 case '\011': /* ^I */ /* NOT \t in EBCDIC */
917 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
919 case '\014': /* ^LAST_FH */
920 if (strEQ(remaining, "AST_FH")) {
922 assert(isGV_with_GP(PL_last_in_gv));
923 SV_CHECK_THINKFIRST_COW_DROP(sv);
924 prepare_SV_for_RV(sv);
926 SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv));
930 else sv_setsv_nomg(sv, NULL);
933 case '\017': /* ^O & ^OPEN */
934 if (nextchar == '\0') {
935 sv_setpv(sv, PL_osname);
938 else if (strEQ(remaining, "PEN")) {
939 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
943 sv_setiv(sv, (IV)PL_perldb);
945 case '\023': /* ^S */
947 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
950 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
955 case '\024': /* ^T */
956 if (nextchar == '\0') {
958 sv_setnv(sv, PL_basetime);
960 sv_setiv(sv, (IV)PL_basetime);
963 else if (strEQ(remaining, "AINT"))
964 sv_setiv(sv, TAINTING_get
965 ? (TAINT_WARN_get || PL_unsafe ? -1 : 1)
968 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
969 if (strEQ(remaining, "NICODE"))
970 sv_setuv(sv, (UV) PL_unicode);
971 else if (strEQ(remaining, "TF8LOCALE"))
972 sv_setuv(sv, (UV) PL_utf8locale);
973 else if (strEQ(remaining, "TF8CACHE"))
974 sv_setiv(sv, (IV) PL_utf8cache);
976 case '\027': /* ^W & $^WARNING_BITS */
977 if (nextchar == '\0')
978 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
979 else if (strEQ(remaining, "ARNING_BITS")) {
980 if (PL_compiling.cop_warnings == pWARN_NONE) {
981 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
983 else if (PL_compiling.cop_warnings == pWARN_STD) {
984 sv_setsv(sv, &PL_sv_undef);
987 else if (PL_compiling.cop_warnings == pWARN_ALL) {
988 /* Get the bit mask for $warnings::Bits{all}, because
989 * it could have been extended by warnings::register */
990 HV * const bits = get_hv("warnings::Bits", 0);
991 SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL;
993 sv_copypv(sv, *bits_all);
995 sv_setpvn(sv, WARN_ALLstring, WARNsize);
998 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
999 *PL_compiling.cop_warnings);
1004 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
1005 paren = RX_LASTPAREN(rx);
1007 goto do_numbuf_fetch;
1009 sv_setsv(sv,&PL_sv_undef);
1011 case '\016': /* ^N */
1012 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
1013 paren = RX_LASTCLOSEPAREN(rx);
1015 goto do_numbuf_fetch;
1017 sv_setsv(sv,&PL_sv_undef);
1020 if (GvIO(PL_last_in_gv)) {
1021 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
1026 sv_setiv(sv, (IV)STATUS_CURRENT);
1027 #ifdef COMPLEX_STATUS
1028 SvUPGRADE(sv, SVt_PVLV);
1029 LvTARGOFF(sv) = PL_statusvalue;
1030 LvTARGLEN(sv) = PL_statusvalue_vms;
1035 if (GvIOp(PL_defoutgv))
1036 s = IoTOP_NAME(GvIOp(PL_defoutgv));
1040 sv_setpv(sv,GvENAME(PL_defoutgv));
1041 sv_catpvs(sv,"_TOP");
1045 if (GvIOp(PL_defoutgv))
1046 s = IoFMT_NAME(GvIOp(PL_defoutgv));
1048 s = GvENAME(PL_defoutgv);
1052 if (GvIO(PL_defoutgv))
1053 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
1056 if (GvIO(PL_defoutgv))
1057 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
1060 if (GvIO(PL_defoutgv))
1061 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
1071 if (GvIO(PL_defoutgv))
1072 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
1076 sv_copypv(sv, PL_ors_sv);
1078 sv_setsv(sv, &PL_sv_undef);
1082 IV const pid = (IV)PerlProc_getpid();
1083 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
1084 /* never set manually, or at least not since last fork */
1086 /* never unsafe, even if reading in a tainted expression */
1089 /* else a value has been assigned manually, so do nothing */
1093 sv_setuid(sv, PerlProc_getuid());
1096 sv_setuid(sv, PerlProc_geteuid());
1099 sv_setgid(sv, PerlProc_getgid());
1102 sv_setgid(sv, PerlProc_getegid());
1104 #ifdef HAS_GETGROUPS
1106 Groups_t *gary = NULL;
1108 I32 num_groups = getgroups(0, gary);
1109 if (num_groups > 0) {
1110 Newx(gary, num_groups, Groups_t);
1111 num_groups = getgroups(num_groups, gary);
1112 for (i = 0; i < num_groups; i++)
1113 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
1117 (void)SvIOK_on(sv); /* what a wonderful hack! */
1127 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
1129 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
1131 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1133 if (uf && uf->uf_val)
1134 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
1139 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
1141 STRLEN len = 0, klen;
1142 const char * const key = MgPV_const(mg,klen);
1145 PERL_ARGS_ASSERT_MAGIC_SETENV;
1149 /* defined environment variables are byte strings; unfortunately
1150 there is no SvPVbyte_force_nomg(), so we must do this piecewise */
1151 (void)SvPV_force_nomg_nolen(sv);
1152 sv_utf8_downgrade(sv, /* fail_ok */ TRUE);
1154 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv");
1160 my_setenv(key, s); /* does the deed */
1162 #ifdef DYNAMIC_ENV_FETCH
1163 /* We just undefd an environment var. Is a replacement */
1164 /* waiting in the wings? */
1166 SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE);
1168 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
1172 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
1173 /* And you'll never guess what the dog had */
1174 /* in its mouth... */
1176 MgTAINTEDDIR_off(mg);
1178 if (s && klen == 8 && strEQ(key, "DCL$PATH")) {
1179 char pathbuf[256], eltbuf[256], *cp, *elt;
1182 my_strlcpy(eltbuf, s, sizeof(eltbuf));
1184 do { /* DCL$PATH may be a search list */
1185 while (1) { /* as may dev portion of any element */
1186 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1187 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1188 cando_by_name(S_IWUSR,0,elt) ) {
1189 MgTAINTEDDIR_on(mg);
1193 if ((cp = strchr(elt, ':')) != NULL)
1195 if (my_trnlnm(elt, eltbuf, j++))
1201 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1204 if (s && klen == 4 && strEQ(key,"PATH")) {
1205 const char * const strend = s + len;
1207 while (s < strend) {
1211 #ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1212 const char path_sep = '|';
1214 const char path_sep = ':';
1216 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1217 s, strend, path_sep, &i);
1219 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
1221 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1223 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1225 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1226 MgTAINTEDDIR_on(mg);
1232 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1238 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1240 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
1241 PERL_UNUSED_ARG(sv);
1242 my_setenv(MgPV_nolen_const(mg),NULL);
1247 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1249 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
1250 PERL_UNUSED_ARG(mg);
1252 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1254 if (PL_localizing) {
1257 hv_iterinit(MUTABLE_HV(sv));
1258 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
1260 my_setenv(hv_iterkey(entry, &keylen),
1261 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
1269 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1271 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
1272 PERL_UNUSED_ARG(sv);
1273 PERL_UNUSED_ARG(mg);
1275 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1283 #ifdef HAS_SIGPROCMASK
1285 restore_sigmask(pTHX_ SV *save_sv)
1287 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
1288 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
1292 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1294 /* Are we fetching a signal entry? */
1295 int i = (I16)mg->mg_private;
1297 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1301 const char * sig = MgPV_const(mg, siglen);
1302 mg->mg_private = i = whichsig_pvn(sig, siglen);
1307 sv_setsv(sv,PL_psig_ptr[i]);
1309 Sighandler_t sigstate = rsignal_state(i);
1310 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1311 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1314 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1315 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1318 /* cache state so we don't fetch it again */
1319 if(sigstate == (Sighandler_t) SIG_IGN)
1320 sv_setpvs(sv,"IGNORE");
1322 sv_setsv(sv,&PL_sv_undef);
1323 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1330 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1332 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
1334 magic_setsig(NULL, mg);
1335 return sv_unmagic(sv, mg->mg_type);
1339 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1340 Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
1342 Perl_csighandler(int sig)
1345 #ifdef PERL_GET_SIG_CONTEXT
1346 dTHXa(PERL_GET_SIG_CONTEXT);
1350 #if defined(__cplusplus) && defined(__GNUC__)
1351 /* g++ doesn't support PERL_UNUSED_DECL, so the sip and uap
1352 * parameters would be warned about. */
1353 PERL_UNUSED_ARG(sip);
1354 PERL_UNUSED_ARG(uap);
1356 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1357 (void) rsignal(sig, PL_csighandlerp);
1358 if (PL_sig_ignoring[sig]) return;
1360 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1361 if (PL_sig_defaulting[sig])
1362 #ifdef KILL_BY_SIGPRC
1363 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1378 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
1379 /* Call the perl level handler now--
1380 * with risk we may be in malloc() or being destructed etc. */
1381 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1382 (*PL_sighandlerp)(sig, NULL, NULL);
1384 (*PL_sighandlerp)(sig);
1387 if (!PL_psig_pend) return;
1388 /* Set a flag to say this signal is pending, that is awaiting delivery after
1389 * the current Perl opcode completes */
1390 PL_psig_pend[sig]++;
1392 #ifndef SIG_PENDING_DIE_COUNT
1393 # define SIG_PENDING_DIE_COUNT 120
1395 /* Add one to say _a_ signal is pending */
1396 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1397 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1398 (unsigned long)SIG_PENDING_DIE_COUNT);
1402 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1404 Perl_csighandler_init(void)
1407 if (PL_sig_handlers_initted) return;
1409 for (sig = 1; sig < SIG_SIZE; sig++) {
1410 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1412 PL_sig_defaulting[sig] = 1;
1413 (void) rsignal(sig, PL_csighandlerp);
1415 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1416 PL_sig_ignoring[sig] = 0;
1419 PL_sig_handlers_initted = 1;
1423 #if defined HAS_SIGPROCMASK
1425 unblock_sigmask(pTHX_ void* newset)
1427 PERL_UNUSED_CONTEXT;
1428 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1433 Perl_despatch_signals(pTHX)
1437 for (sig = 1; sig < SIG_SIZE; sig++) {
1438 if (PL_psig_pend[sig]) {
1440 #ifdef HAS_SIGPROCMASK
1441 /* From sigaction(2) (FreeBSD man page):
1442 * | Signal routines normally execute with the signal that
1443 * | caused their invocation blocked, but other signals may
1445 * Emulation of this behavior (from within Perl) is enabled
1449 sigset_t newset, oldset;
1451 sigemptyset(&newset);
1452 sigaddset(&newset, sig);
1453 sigprocmask(SIG_BLOCK, &newset, &oldset);
1454 was_blocked = sigismember(&oldset, sig);
1456 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1458 SAVEFREESV(save_sv);
1459 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1462 PL_psig_pend[sig] = 0;
1463 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1464 (*PL_sighandlerp)(sig, NULL, NULL);
1466 (*PL_sighandlerp)(sig);
1468 #ifdef HAS_SIGPROCMASK
1477 /* sv of NULL signifies that we're acting as magic_clearsig. */
1479 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1484 /* Need to be careful with SvREFCNT_dec(), because that can have side
1485 * effects (due to closures). We must make sure that the new disposition
1486 * is in place before it is called.
1490 #ifdef HAS_SIGPROCMASK
1494 const char *s = MgPV_const(mg,len);
1496 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1499 if (memEQs(s, len, "__DIE__"))
1501 else if (memEQs(s, len, "__WARN__")
1502 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1503 /* Merge the existing behaviours, which are as follows:
1504 magic_setsig, we always set svp to &PL_warnhook
1505 (hence we always change the warnings handler)
1506 For magic_clearsig, we don't change the warnings handler if it's
1507 set to the &PL_warnhook. */
1510 SV *tmp = sv_newmortal();
1511 Perl_croak(aTHX_ "No such hook: %s",
1512 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1516 if (*svp != PERL_WARNHOOK_FATAL)
1522 i = (I16)mg->mg_private;
1524 i = whichsig_pvn(s, len); /* ...no, a brick */
1525 mg->mg_private = (U16)i;
1529 SV *tmp = sv_newmortal();
1530 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1531 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1535 #ifdef HAS_SIGPROCMASK
1536 /* Avoid having the signal arrive at a bad time, if possible. */
1539 sigprocmask(SIG_BLOCK, &set, &save);
1541 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
1542 SAVEFREESV(save_sv);
1543 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1546 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1547 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1549 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1550 PL_sig_ignoring[i] = 0;
1552 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1553 PL_sig_defaulting[i] = 0;
1555 to_dec = PL_psig_ptr[i];
1557 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1558 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1560 /* Signals don't change name during the program's execution, so once
1561 they're cached in the appropriate slot of PL_psig_name, they can
1564 Ideally we'd find some way of making SVs at (C) compile time, or
1565 at least, doing most of the work. */
1566 if (!PL_psig_name[i]) {
1567 PL_psig_name[i] = newSVpvn(s, len);
1568 SvREADONLY_on(PL_psig_name[i]);
1571 SvREFCNT_dec(PL_psig_name[i]);
1572 PL_psig_name[i] = NULL;
1573 PL_psig_ptr[i] = NULL;
1576 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
1578 (void)rsignal(i, PL_csighandlerp);
1581 *svp = SvREFCNT_inc_simple_NN(sv);
1583 if (sv && SvOK(sv)) {
1584 s = SvPV_force(sv, len);
1588 if (sv && memEQs(s, len,"IGNORE")) {
1590 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1591 PL_sig_ignoring[i] = 1;
1592 (void)rsignal(i, PL_csighandlerp);
1594 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1598 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
1600 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1601 PL_sig_defaulting[i] = 1;
1602 (void)rsignal(i, PL_csighandlerp);
1604 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1610 * We should warn if HINT_STRICT_REFS, but without
1611 * access to a known hint bit in a known OP, we can't
1612 * tell whether HINT_STRICT_REFS is in force or not.
1614 if (!strchr(s,':') && !strchr(s,'\''))
1615 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1618 (void)rsignal(i, PL_csighandlerp);
1620 *svp = SvREFCNT_inc_simple_NN(sv);
1624 #ifdef HAS_SIGPROCMASK
1628 SvREFCNT_dec(to_dec);
1631 #endif /* !PERL_MICRO */
1634 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1636 PERL_ARGS_ASSERT_MAGIC_SETISA;
1637 PERL_UNUSED_ARG(sv);
1639 /* Skip _isaelem because _isa will handle it shortly */
1640 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
1643 return magic_clearisa(NULL, mg);
1646 /* sv of NULL signifies that we're acting as magic_setisa. */
1648 Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1651 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1653 /* Bail out if destruction is going on */
1654 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
1657 av_clear(MUTABLE_AV(sv));
1659 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1660 /* This occurs with setisa_elem magic, which calls this
1662 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1665 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1666 SV **svp = AvARRAY((AV *)mg->mg_obj);
1667 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1669 stash = GvSTASH((GV *)*svp++);
1670 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1677 (const GV *)mg->mg_obj
1680 /* The stash may have been detached from the symbol table, so check its
1681 name before doing anything. */
1682 if (stash && HvENAME_get(stash))
1683 mro_isa_changed_in(stash);
1689 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1691 HV * const hv = MUTABLE_HV(LvTARG(sv));
1694 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
1695 PERL_UNUSED_ARG(mg);
1698 (void) hv_iterinit(hv);
1699 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1702 while (hv_iternext(hv))
1707 sv_setiv(sv, (IV)i);
1712 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1714 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
1715 PERL_UNUSED_ARG(mg);
1717 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
1723 =for apidoc magic_methcall
1725 Invoke a magic method (like FETCH).
1727 C<sv> and C<mg> are the tied thingy and the tie magic.
1729 C<meth> is the name of the method to call.
1731 C<argc> is the number of args (in addition to $self) to pass to the method.
1733 The C<flags> can be:
1735 G_DISCARD invoke method with G_DISCARD flag and don't
1737 G_UNDEF_FILL fill the stack with argc pointers to
1740 The arguments themselves are any values following the C<flags> argument.
1742 Returns the SV (if any) returned by the method, or NULL on failure.
1749 Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1755 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1759 if (flags & G_WRITING_TO_STDERR) {
1762 SAVESPTR(PL_stderrgv);
1766 PUSHSTACKi(PERLSI_MAGIC);
1770 PUSHs(SvTIED_obj(sv, mg));
1771 if (flags & G_UNDEF_FILL) {
1773 PUSHs(&PL_sv_undef);
1775 } else if (argc > 0) {
1777 va_start(args, argc);
1780 SV *const sv = va_arg(args, SV *);
1787 if (flags & G_DISCARD) {
1788 call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED);
1791 if (call_sv(meth, G_SCALAR|G_METHOD_NAMED))
1792 ret = *PL_stack_sp--;
1795 if (flags & G_WRITING_TO_STDERR)
1801 /* wrapper for magic_methcall that creates the first arg */
1804 S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1809 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1812 if (mg->mg_len >= 0) {
1813 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
1815 else if (mg->mg_len == HEf_SVKEY)
1816 arg1 = MUTABLE_SV(mg->mg_ptr);
1818 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1819 arg1 = newSViv((IV)(mg->mg_len));
1823 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
1825 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
1829 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth)
1833 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1835 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1842 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1844 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1846 if (mg->mg_type == PERL_MAGIC_tiedelem)
1847 mg->mg_flags |= MGf_GSKIP;
1848 magic_methpack(sv,mg,SV_CONST(FETCH));
1853 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1858 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1860 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1861 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1862 * public flags indicate its value based on copying from $val. Doing
1863 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1864 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1865 * wrong if $val happened to be tainted, as sv hasn't got magic
1866 * enabled, even though taint magic is in the chain. In which case,
1867 * fake up a temporary tainted value (this is easier than temporarily
1868 * re-enabling magic on sv). */
1870 if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint))
1871 && (tmg->mg_len & 1))
1873 val = sv_mortalcopy(sv);
1879 magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val);
1884 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1886 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1888 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
1889 return magic_methpack(sv,mg,SV_CONST(DELETE));
1894 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1899 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1901 retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL);
1903 retval = SvIV(retsv)-1;
1905 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
1907 return (U32) retval;
1911 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1913 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1915 Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0);
1920 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1924 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1926 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key)
1927 : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0);
1934 Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
1936 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1938 return magic_methpack(sv,mg,SV_CONST(EXISTS));
1942 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1945 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1946 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
1948 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1950 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1952 if (HvEITER_get(hv))
1953 /* we are in an iteration so the hash cannot be empty */
1955 /* no xhv_eiter so now use FIRSTKEY */
1956 key = sv_newmortal();
1957 magic_nextpack(MUTABLE_SV(hv), mg, key);
1958 HvEITER_set(hv, NULL); /* need to reset iterator */
1959 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1962 /* there is a SCALAR method that we can call */
1963 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0);
1965 retval = &PL_sv_undef;
1970 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1974 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
1976 /* The magic ptr/len for the debugger's hash should always be an SV. */
1977 if (UNLIKELY(mg->mg_len != HEf_SVKEY)) {
1978 Perl_croak(aTHX_ "panic: magic_setdbline len=%"IVdf", ptr='%s'",
1979 (IV)mg->mg_len, mg->mg_ptr);
1982 /* Use sv_2iv instead of SvIV() as the former generates smaller code, and
1983 setting/clearing debugger breakpoints is not a hot path. */
1984 svp = av_fetch(MUTABLE_AV(mg->mg_obj),
1985 sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE);
1987 if (svp && SvIOKp(*svp)) {
1988 OP * const o = INT2PTR(OP*,SvIVX(*svp));
1990 #ifdef PERL_DEBUG_READONLY_OPS
1991 Slab_to_rw(OpSLAB(o));
1993 /* set or clear breakpoint in the relevant control op */
1995 o->op_flags |= OPf_SPECIAL;
1997 o->op_flags &= ~OPf_SPECIAL;
1998 #ifdef PERL_DEBUG_READONLY_OPS
1999 Slab_to_ro(OpSLAB(o));
2007 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
2009 AV * const obj = MUTABLE_AV(mg->mg_obj);
2011 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2014 sv_setiv(sv, AvFILL(obj));
2022 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
2024 AV * const obj = MUTABLE_AV(mg->mg_obj);
2026 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2029 av_fill(obj, SvIV(sv));
2031 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2032 "Attempt to set length of freed array");
2038 Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2040 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2041 PERL_UNUSED_ARG(sv);
2042 PERL_UNUSED_CONTEXT;
2044 /* Reset the iterator when the array is cleared */
2045 #if IVSIZE == I32SIZE
2046 *((IV *) &(mg->mg_len)) = 0;
2049 *((IV *) mg->mg_ptr) = 0;
2056 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2058 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
2059 PERL_UNUSED_ARG(sv);
2061 /* during global destruction, mg_obj may already have been freed */
2062 if (PL_in_clean_all)
2065 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2068 /* arylen scalar holds a pointer back to the array, but doesn't own a
2069 reference. Hence the we (the array) are about to go away with it
2070 still pointing at us. Clear its pointer, else it would be pointing
2071 at free memory. See the comment in sv_magic about reference loops,
2072 and why it can't own a reference to us. */
2079 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
2081 SV* const lsv = LvTARG(sv);
2082 MAGIC * const found = mg_find_mglob(lsv);
2084 PERL_ARGS_ASSERT_MAGIC_GETPOS;
2085 PERL_UNUSED_ARG(mg);
2087 if (found && found->mg_len != -1) {
2088 STRLEN i = found->mg_len;
2089 if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv))
2090 i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN);
2099 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
2101 SV* const lsv = LvTARG(sv);
2108 PERL_ARGS_ASSERT_MAGIC_SETPOS;
2109 PERL_UNUSED_ARG(mg);
2111 found = mg_find_mglob(lsv);
2115 found = sv_magicext_mglob(lsv);
2117 else if (!SvOK(sv)) {
2121 s = SvPV_const(lsv, len);
2126 ulen = sv_or_pv_len_utf8(lsv, s, len);
2136 else if (pos > (SSize_t)len)
2139 found->mg_len = pos;
2140 found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES);
2146 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
2149 SV * const lsv = LvTARG(sv);
2150 const char * const tmps = SvPV_const(lsv,len);
2151 STRLEN offs = LvTARGOFF(sv);
2152 STRLEN rem = LvTARGLEN(sv);
2153 const bool negoff = LvFLAGS(sv) & 1;
2154 const bool negrem = LvFLAGS(sv) & 2;
2156 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
2157 PERL_UNUSED_ARG(mg);
2159 if (!translate_substr_offsets(
2160 SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len,
2161 negoff ? -(IV)offs : (IV)offs, !negoff,
2162 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2164 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2165 sv_setsv_nomg(sv, &PL_sv_undef);
2170 offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem);
2171 sv_setpvn(sv, tmps + offs, rem);
2178 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
2180 STRLEN len, lsv_len, oldtarglen, newtarglen;
2181 const char * const tmps = SvPV_const(sv, len);
2182 SV * const lsv = LvTARG(sv);
2183 STRLEN lvoff = LvTARGOFF(sv);
2184 STRLEN lvlen = LvTARGLEN(sv);
2185 const bool negoff = LvFLAGS(sv) & 1;
2186 const bool neglen = LvFLAGS(sv) & 2;
2188 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
2189 PERL_UNUSED_ARG(mg);
2193 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2194 "Attempt to use reference as lvalue in substr"
2196 SvPV_force_nomg(lsv,lsv_len);
2197 if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv);
2198 if (!translate_substr_offsets(
2200 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2201 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2203 Perl_croak(aTHX_ "substr outside of string");
2206 sv_utf8_upgrade_nomg(lsv);
2207 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
2208 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
2209 newtarglen = sv_or_pv_len_utf8(sv, tmps, len);
2212 else if (SvUTF8(lsv)) {
2214 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
2216 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2217 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
2221 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
2224 if (!neglen) LvTARGLEN(sv) = newtarglen;
2225 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
2231 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
2233 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
2234 PERL_UNUSED_ARG(sv);
2235 #ifdef NO_TAINT_SUPPORT
2236 PERL_UNUSED_ARG(mg);
2239 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1) && IN_PERL_RUNTIME);
2244 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
2246 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
2247 PERL_UNUSED_ARG(sv);
2249 /* update taint status */
2258 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
2260 SV * const lsv = LvTARG(sv);
2262 PERL_ARGS_ASSERT_MAGIC_GETVEC;
2263 PERL_UNUSED_ARG(mg);
2265 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2271 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
2273 PERL_ARGS_ASSERT_MAGIC_SETVEC;
2274 PERL_UNUSED_ARG(mg);
2275 do_vecset(sv); /* XXX slurp this routine */
2280 Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg)
2283 PERL_ARGS_ASSERT_DEFELEM_TARGET;
2284 if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem);
2286 if (LvTARGLEN(sv)) {
2288 SV * const ahv = LvTARG(sv);
2289 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
2293 else if (LvSTARGOFF(sv) >= 0) {
2294 AV *const av = MUTABLE_AV(LvTARG(sv));
2295 if (LvSTARGOFF(sv) <= AvFILL(av))
2297 if (SvRMAGICAL(av)) {
2298 SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0);
2299 targ = svp ? *svp : NULL;
2302 targ = AvARRAY(av)[LvSTARGOFF(sv)];
2305 if (targ && (targ != &PL_sv_undef)) {
2306 /* somebody else defined it for us */
2307 SvREFCNT_dec(LvTARG(sv));
2308 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2310 SvREFCNT_dec(mg->mg_obj);
2312 mg->mg_flags &= ~MGf_REFCOUNTED;
2321 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2323 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2325 sv_setsv(sv, defelem_target(sv, mg));
2330 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2332 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
2333 PERL_UNUSED_ARG(mg);
2337 sv_setsv(LvTARG(sv), sv);
2338 SvSETMAGIC(LvTARG(sv));
2344 Perl_vivify_defelem(pTHX_ SV *sv)
2349 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2351 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2354 SV * const ahv = LvTARG(sv);
2355 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
2358 if (!value || value == &PL_sv_undef)
2359 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
2361 else if (LvSTARGOFF(sv) < 0)
2362 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
2364 AV *const av = MUTABLE_AV(LvTARG(sv));
2365 if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av))
2366 LvTARG(sv) = NULL; /* array can't be extended */
2368 SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE);
2369 if (!svp || !(value = *svp))
2370 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
2373 SvREFCNT_inc_simple_void(value);
2374 SvREFCNT_dec(LvTARG(sv));
2377 SvREFCNT_dec(mg->mg_obj);
2379 mg->mg_flags &= ~MGf_REFCOUNTED;
2383 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2385 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
2386 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2391 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2393 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
2394 PERL_UNUSED_CONTEXT;
2395 PERL_UNUSED_ARG(sv);
2401 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2403 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2405 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2407 if (uf && uf->uf_set)
2408 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2413 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2415 const char type = mg->mg_type;
2417 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2419 if (type == PERL_MAGIC_qr) {
2420 } else if (type == PERL_MAGIC_bm) {
2424 assert(type == PERL_MAGIC_fm);
2426 return sv_unmagic(sv, type);
2429 #ifdef USE_LOCALE_COLLATE
2431 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2433 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2436 * RenE<eacute> Descartes said "I think not."
2437 * and vanished with a faint plop.
2439 PERL_UNUSED_CONTEXT;
2440 PERL_UNUSED_ARG(sv);
2442 Safefree(mg->mg_ptr);
2448 #endif /* USE_LOCALE_COLLATE */
2450 /* Just clear the UTF-8 cache data. */
2452 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2454 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
2455 PERL_UNUSED_CONTEXT;
2456 PERL_UNUSED_ARG(sv);
2457 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2459 mg->mg_len = -1; /* The mg_len holds the len cache. */
2464 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2476 PERL_ARGS_ASSERT_MAGIC_SET;
2480 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2482 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2484 /* Croak with a READONLY error when a numbered match var is
2485 * set without a previous pattern match. Unless it's C<local $1>
2488 if (!PL_localizing) {
2489 Perl_croak_no_modify();
2495 switch (*mg->mg_ptr) {
2496 case '\001': /* ^A */
2497 if (SvOK(sv)) sv_copypv(PL_bodytarget, sv);
2498 else SvOK_off(PL_bodytarget);
2499 FmLINES(PL_bodytarget) = 0;
2500 if (SvPOK(PL_bodytarget)) {
2501 char *s = SvPVX(PL_bodytarget);
2502 while ( ((s = strchr(s, '\n'))) ) {
2503 FmLINES(PL_bodytarget)++;
2507 /* mg_set() has temporarily made sv non-magical */
2509 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2510 SvTAINTED_on(PL_bodytarget);
2512 SvTAINTED_off(PL_bodytarget);
2515 case '\003': /* ^C */
2516 PL_minus_c = cBOOL(SvIV(sv));
2519 case '\004': /* ^D */
2521 s = SvPV_nolen_const(sv);
2522 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2523 if (DEBUG_x_TEST || DEBUG_B_TEST)
2524 dump_all_perl(!DEBUG_B_TEST);
2526 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2529 case '\005': /* ^E */
2530 if (*(mg->mg_ptr+1) == '\0') {
2532 set_vaxc_errno(SvIV(sv));
2535 SetLastError( SvIV(sv) );
2538 os2_setsyserrno(SvIV(sv));
2540 /* will anyone ever use this? */
2541 SETERRNO(SvIV(sv), 4);
2546 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2547 SvREFCNT_dec(PL_encoding);
2548 if (SvOK(sv) || SvGMAGICAL(sv)) {
2549 PL_encoding = newSVsv(sv);
2556 case '\006': /* ^F */
2557 PL_maxsysfd = SvIV(sv);
2559 case '\010': /* ^H */
2560 PL_hints = SvIV(sv);
2562 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2563 Safefree(PL_inplace);
2564 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2566 case '\016': /* ^N */
2567 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2568 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2570 case '\017': /* ^O */
2571 if (*(mg->mg_ptr+1) == '\0') {
2572 Safefree(PL_osname);
2575 TAINT_PROPER("assigning to $^O");
2576 PL_osname = savesvpv(sv);
2579 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2581 const char *const start = SvPV(sv, len);
2582 const char *out = (const char*)memchr(start, '\0', len);
2586 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2587 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2589 /* Opening for input is more common than opening for output, so
2590 ensure that hints for input are sooner on linked list. */
2591 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
2593 : newSVpvs_flags("", SvUTF8(sv));
2594 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2597 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2599 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2603 case '\020': /* ^P */
2604 PL_perldb = SvIV(sv);
2605 if (PL_perldb && !PL_DBsingle)
2608 case '\024': /* ^T */
2610 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2612 PL_basetime = (Time_t)SvIV(sv);
2615 case '\025': /* ^UTF8CACHE */
2616 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2617 PL_utf8cache = (signed char) sv_2iv(sv);
2620 case '\027': /* ^W & $^WARNING_BITS */
2621 if (*(mg->mg_ptr+1) == '\0') {
2622 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2624 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2625 | (i ? G_WARN_ON : G_WARN_OFF) ;
2628 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2629 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2631 PL_compiling.cop_warnings = pWARN_STD;
2636 int accumulate = 0 ;
2637 int any_fatals = 0 ;
2638 const char * const ptr = SvPV_const(sv, len) ;
2639 for (i = 0 ; i < len ; ++i) {
2640 accumulate |= ptr[i] ;
2641 any_fatals |= (ptr[i] & 0xAA) ;
2644 if (!specialWARN(PL_compiling.cop_warnings))
2645 PerlMemShared_free(PL_compiling.cop_warnings);
2646 PL_compiling.cop_warnings = pWARN_NONE;
2648 /* Yuck. I can't see how to abstract this: */
2650 ((STRLEN *)SvPV_nolen_const(sv)) - 1,
2654 if (!specialWARN(PL_compiling.cop_warnings))
2655 PerlMemShared_free(PL_compiling.cop_warnings);
2656 PL_compiling.cop_warnings = pWARN_ALL;
2657 PL_dowarn |= G_WARN_ONCE ;
2661 const char *const p = SvPV_const(sv, len);
2663 PL_compiling.cop_warnings
2664 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2667 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2668 PL_dowarn |= G_WARN_ONCE ;
2676 if (PL_localizing) {
2677 if (PL_localizing == 1)
2678 SAVESPTR(PL_last_in_gv);
2680 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2681 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2684 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2685 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2686 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2689 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2690 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2691 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2694 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2697 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2698 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2699 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2702 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2706 IO * const io = GvIO(PL_defoutgv);
2709 if ((SvIV(sv)) == 0)
2710 IoFLAGS(io) &= ~IOf_FLUSH;
2712 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2713 PerlIO *ofp = IoOFP(io);
2715 (void)PerlIO_flush(ofp);
2716 IoFLAGS(io) |= IOf_FLUSH;
2725 SV *referent= SvRV(sv);
2726 const char *reftype= sv_reftype(referent, 0);
2727 /* XXX: dodgy type check: This leaves me feeling dirty, but the alternative
2728 * is to copy pretty much the entire sv_reftype() into this routine, or to do
2729 * a full string comparison on the return of sv_reftype() both of which
2730 * make me feel worse! NOTE, do not modify this comment without reviewing the
2731 * corresponding comment in sv_reftype(). - Yves */
2732 if (reftype[0] == 'S' || reftype[0] == 'L') {
2733 IV val= SvIV(referent);
2735 tmpsv= &PL_sv_undef;
2736 Perl_ck_warner(aTHX_ packWARN(WARN_DEPRECATED),
2737 "Setting $/ to a reference to %s as a form of slurp is deprecated, treating as undef",
2738 SvIV(SvRV(sv)) < 0 ? "a negative integer" : "zero"
2742 /* diag_listed_as: Setting $/ to %s reference is forbidden */
2743 Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden",
2744 *reftype == 'A' ? "n" : "", reftype);
2747 SvREFCNT_dec(PL_rs);
2748 PL_rs = newSVsv(tmpsv);
2752 SvREFCNT_dec(PL_ors_sv);
2754 PL_ors_sv = newSVsv(sv);
2762 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2765 #ifdef COMPLEX_STATUS
2766 if (PL_localizing == 2) {
2767 SvUPGRADE(sv, SVt_PVLV);
2768 PL_statusvalue = LvTARGOFF(sv);
2769 PL_statusvalue_vms = LvTARGLEN(sv);
2773 #ifdef VMSISH_STATUS
2775 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2778 STATUS_UNIX_EXIT_SET(SvIV(sv));
2783 # define PERL_VMS_BANG vaxc$errno
2785 # define PERL_VMS_BANG 0
2787 #if defined(WIN32) && ! defined(UNDER_CE)
2788 SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0),
2789 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2791 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2792 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2798 /* XXX $< currently silently ignores failures */
2799 const Uid_t new_uid = SvUID(sv);
2800 PL_delaymagic_uid = new_uid;
2801 if (PL_delaymagic) {
2802 PL_delaymagic |= DM_RUID;
2803 break; /* don't do magic till later */
2806 PERL_UNUSED_RESULT(setruid(new_uid));
2809 PERL_UNUSED_RESULT(setreuid(new_uid, (Uid_t)-1));
2811 #ifdef HAS_SETRESUID
2812 PERL_UNUSED_RESULT(setresuid(new_uid, (Uid_t)-1, (Uid_t)-1));
2814 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
2816 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2817 if (new_uid != 0 && PerlProc_getuid() == 0)
2818 PERL_UNUSED_RESULT(PerlProc_setuid(0));
2820 PERL_UNUSED_RESULT(PerlProc_setuid(new_uid));
2822 Perl_croak(aTHX_ "setruid() not implemented");
2831 /* XXX $> currently silently ignores failures */
2832 const Uid_t new_euid = SvUID(sv);
2833 PL_delaymagic_euid = new_euid;
2834 if (PL_delaymagic) {
2835 PL_delaymagic |= DM_EUID;
2836 break; /* don't do magic till later */
2839 PERL_UNUSED_RESULT(seteuid(new_euid));
2842 PERL_UNUSED_RESULT(setreuid((Uid_t)-1, new_euid));
2844 #ifdef HAS_SETRESUID
2845 PERL_UNUSED_RESULT(setresuid((Uid_t)-1, new_euid, (Uid_t)-1));
2847 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
2848 PERL_UNUSED_RESULT(PerlProc_setuid(new_euid));
2850 Perl_croak(aTHX_ "seteuid() not implemented");
2859 /* XXX $( currently silently ignores failures */
2860 const Gid_t new_gid = SvGID(sv);
2861 PL_delaymagic_gid = new_gid;
2862 if (PL_delaymagic) {
2863 PL_delaymagic |= DM_RGID;
2864 break; /* don't do magic till later */
2867 PERL_UNUSED_RESULT(setrgid(new_gid));
2870 PERL_UNUSED_RESULT(setregid(new_gid, (Gid_t)-1));
2872 #ifdef HAS_SETRESGID
2873 PERL_UNUSED_RESULT(setresgid(new_gid, (Gid_t)-1, (Gid_t) -1));
2875 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2876 PERL_UNUSED_RESULT(PerlProc_setgid(new_gid));
2878 Perl_croak(aTHX_ "setrgid() not implemented");
2887 /* XXX $) currently silently ignores failures */
2889 #ifdef HAS_SETGROUPS
2891 const char *p = SvPV_const(sv, len);
2892 Groups_t *gary = NULL;
2894 #ifdef _SC_NGROUPS_MAX
2895 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2900 int maxgrp = NGROUPS;
2905 new_egid = (Gid_t)grok_atou(p, &endptr);
2906 for (i = 0; i < maxgrp; ++i) {
2915 Newx(gary, i + 1, Groups_t);
2917 Renew(gary, i + 1, Groups_t);
2918 gary[i] = (Groups_t)grok_atou(p, &endptr);
2921 PERL_UNUSED_RESULT(setgroups(i, gary));
2924 #else /* HAS_SETGROUPS */
2925 new_egid = SvGID(sv);
2926 #endif /* HAS_SETGROUPS */
2927 PL_delaymagic_egid = new_egid;
2928 if (PL_delaymagic) {
2929 PL_delaymagic |= DM_EGID;
2930 break; /* don't do magic till later */
2933 PERL_UNUSED_RESULT(setegid(new_egid));
2936 PERL_UNUSED_RESULT(setregid((Gid_t)-1, new_egid));
2938 #ifdef HAS_SETRESGID
2939 PERL_UNUSED_RESULT(setresgid((Gid_t)-1, new_egid, (Gid_t)-1));
2941 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2942 PERL_UNUSED_RESULT(PerlProc_setgid(new_egid));
2944 Perl_croak(aTHX_ "setegid() not implemented");
2952 PL_chopset = SvPV_force(sv,len);
2955 /* Store the pid in mg->mg_obj so we can tell when a fork has
2956 occurred. mg->mg_obj points to *$ by default, so clear it. */
2957 if (isGV(mg->mg_obj)) {
2958 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
2959 SvREFCNT_dec(mg->mg_obj);
2960 mg->mg_flags |= MGf_REFCOUNTED;
2961 mg->mg_obj = newSViv((IV)PerlProc_getpid());
2963 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
2966 LOCK_DOLLARZERO_MUTEX;
2967 #ifdef HAS_SETPROCTITLE
2968 /* The BSDs don't show the argv[] in ps(1) output, they
2969 * show a string from the process struct and provide
2970 * the setproctitle() routine to manipulate that. */
2971 if (PL_origalen != 1) {
2972 s = SvPV_const(sv, len);
2973 # if __FreeBSD_version > 410001
2974 /* The leading "-" removes the "perl: " prefix,
2975 * but not the "(perl) suffix from the ps(1)
2976 * output, because that's what ps(1) shows if the
2977 * argv[] is modified. */
2978 setproctitle("-%s", s);
2979 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
2980 /* This doesn't really work if you assume that
2981 * $0 = 'foobar'; will wipe out 'perl' from the $0
2982 * because in ps(1) output the result will be like
2983 * sprintf("perl: %s (perl)", s)
2984 * I guess this is a security feature:
2985 * one (a user process) cannot get rid of the original name.
2987 setproctitle("%s", s);
2990 #elif defined(__hpux) && defined(PSTAT_SETCMD)
2991 if (PL_origalen != 1) {
2993 s = SvPV_const(sv, len);
2994 un.pst_command = (char *)s;
2995 pstat(PSTAT_SETCMD, un, len, 0, 0);
2998 if (PL_origalen > 1) {
2999 /* PL_origalen is set in perl_parse(). */
3000 s = SvPV_force(sv,len);
3001 if (len >= (STRLEN)PL_origalen-1) {
3002 /* Longer than original, will be truncated. We assume that
3003 * PL_origalen bytes are available. */
3004 Copy(s, PL_origargv[0], PL_origalen-1, char);
3007 /* Shorter than original, will be padded. */
3009 /* Special case for Mac OS X: see [perl #38868] */
3012 /* Is the space counterintuitive? Yes.
3013 * (You were expecting \0?)
3014 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3016 const int pad = ' ';
3018 Copy(s, PL_origargv[0], len, char);
3019 PL_origargv[0][len] = 0;
3020 memset(PL_origargv[0] + len + 1,
3021 pad, PL_origalen - len - 1);
3023 PL_origargv[0][PL_origalen-1] = 0;
3024 for (i = 1; i < PL_origargc; i++)
3026 #ifdef HAS_PRCTL_SET_NAME
3027 /* Set the legacy process name in addition to the POSIX name on Linux */
3028 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3029 /* diag_listed_as: SKIPME */
3030 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3035 UNLOCK_DOLLARZERO_MUTEX;
3042 Perl_whichsig_sv(pTHX_ SV *sigsv)
3046 PERL_ARGS_ASSERT_WHICHSIG_SV;
3047 sigpv = SvPV_const(sigsv, siglen);
3048 return whichsig_pvn(sigpv, siglen);
3052 Perl_whichsig_pv(pTHX_ const char *sig)
3054 PERL_ARGS_ASSERT_WHICHSIG_PV;
3055 return whichsig_pvn(sig, strlen(sig));
3059 Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
3063 PERL_ARGS_ASSERT_WHICHSIG_PVN;
3064 PERL_UNUSED_CONTEXT;
3066 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
3067 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
3068 return PL_sig_num[sigv - (char* const*)PL_sig_name];
3070 if (memEQs(sig, len, "CHLD"))
3074 if (memEQs(sig, len, "CLD"))
3081 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3082 Perl_sighandler(int sig, siginfo_t *sip, void *uap)
3084 Perl_sighandler(int sig)
3087 #ifdef PERL_GET_SIG_CONTEXT
3088 dTHXa(PERL_GET_SIG_CONTEXT);
3095 SV * const tSv = PL_Sv;
3099 XPV * const tXpv = PL_Xpv;
3100 I32 old_ss_ix = PL_savestack_ix;
3101 SV *errsv_save = NULL;
3104 if (!PL_psig_ptr[sig]) {
3105 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
3110 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3111 /* Max number of items pushed there is 3*n or 4. We cannot fix
3112 infinity, so we fix 4 (in fact 5): */
3113 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3115 PL_savestack_ix += 5; /* Protect save in progress. */
3116 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3119 /* sv_2cv is too complicated, try a simpler variant first: */
3120 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
3121 || SvTYPE(cv) != SVt_PVCV) {
3123 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
3126 if (!cv || !CvROOT(cv)) {
3127 const HEK * const hek = gv
3131 : cv && CvGV(cv) ? GvENAME_HEK(CvGV(cv)) : NULL;
3133 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
3134 "SIG%s handler \"%"HEKf"\" not defined.\n",
3135 PL_sig_name[sig], hek);
3136 /* diag_listed_as: SIG%s handler "%s" not defined */
3137 else Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL),
3138 "SIG%s handler \"__ANON__\" not defined.\n",
3143 sv = PL_psig_name[sig]
3144 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3145 : newSVpv(PL_sig_name[sig],0);
3149 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3150 /* make sure our assumption about the size of the SAVEs are correct:
3151 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3152 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3155 PUSHSTACKi(PERLSI_SIGNAL);
3158 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3160 struct sigaction oact;
3162 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
3165 SV *rv = newRV_noinc(MUTABLE_SV(sih));
3166 /* The siginfo fields signo, code, errno, pid, uid,
3167 * addr, status, and band are defined by POSIX/SUSv3. */
3168 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3169 (void)hv_stores(sih, "code", newSViv(sip->si_code));
3170 #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. */
3171 hv_stores(sih, "errno", newSViv(sip->si_errno));
3172 hv_stores(sih, "status", newSViv(sip->si_status));
3173 hv_stores(sih, "uid", newSViv(sip->si_uid));
3174 hv_stores(sih, "pid", newSViv(sip->si_pid));
3175 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3176 hv_stores(sih, "band", newSViv(sip->si_band));
3180 mPUSHp((char *)sip, sizeof(*sip));
3188 errsv_save = newSVsv(ERRSV);
3190 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
3194 SV * const errsv = ERRSV;
3195 if (SvTRUE_NN(errsv)) {
3196 SvREFCNT_dec(errsv_save);
3198 /* Handler "died", for example to get out of a restart-able read().
3199 * Before we re-do that on its behalf re-enable the signal which was
3200 * blocked by the system when we entered.
3202 #ifdef HAS_SIGPROCMASK
3203 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3209 sigaddset(&set,sig);
3210 sigprocmask(SIG_UNBLOCK, &set, NULL);
3213 /* Not clear if this will work */
3214 (void)rsignal(sig, SIG_IGN);
3215 (void)rsignal(sig, PL_csighandlerp);
3217 #endif /* !PERL_MICRO */
3221 sv_setsv(errsv, errsv_save);
3222 SvREFCNT_dec(errsv_save);
3227 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3228 PL_savestack_ix = old_ss_ix;
3230 SvREFCNT_dec_NN(sv);
3231 PL_op = myop; /* Apparently not needed... */
3233 PL_Sv = tSv; /* Restore global temporaries. */
3240 S_restore_magic(pTHX_ const void *p)
3242 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3243 SV* const sv = mgs->mgs_sv;
3249 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3250 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
3251 #ifdef PERL_OLD_COPY_ON_WRITE
3252 /* While magic was saved (and off) sv_setsv may well have seen
3253 this SV as a prime candidate for COW. */
3255 sv_force_normal_flags(sv, 0);
3257 if (mgs->mgs_readonly)
3259 if (mgs->mgs_magical)
3260 SvFLAGS(sv) |= mgs->mgs_magical;
3265 bumped = mgs->mgs_bumped;
3266 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3268 /* If we're still on top of the stack, pop us off. (That condition
3269 * will be satisfied if restore_magic was called explicitly, but *not*
3270 * if it's being called via leave_scope.)
3271 * The reason for doing this is that otherwise, things like sv_2cv()
3272 * may leave alloc gunk on the savestack, and some code
3273 * (e.g. sighandler) doesn't expect that...
3275 if (PL_savestack_ix == mgs->mgs_ss_ix)
3277 UV popval = SSPOPUV;
3278 assert(popval == SAVEt_DESTRUCTOR_X);
3279 PL_savestack_ix -= 2;
3281 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3282 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
3285 if (SvREFCNT(sv) == 1) {
3286 /* We hold the last reference to this SV, which implies that the
3287 SV was deleted as a side effect of the routines we called.
3288 So artificially keep it alive a bit longer.
3289 We avoid turning on the TEMP flag, which can cause the SV's
3290 buffer to get stolen (and maybe other stuff). */
3295 SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */
3299 /* clean up the mess created by Perl_sighandler().
3300 * Note that this is only called during an exit in a signal handler;
3301 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
3305 S_unwind_handler_stack(pTHX_ const void *p)
3309 PL_savestack_ix -= 5; /* Unprotect save in progress. */
3313 =for apidoc magic_sethint
3315 Triggered by a store to %^H, records the key/value pair to
3316 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3317 anything that would need a deep copy. Maybe we should warn if we find a
3323 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3325 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
3326 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
3328 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3330 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3331 an alternative leaf in there, with PL_compiling.cop_hints being used if
3332 it's NULL. If needed for threads, the alternative could lock a mutex,
3333 or take other more complex action. */
3335 /* Something changed in %^H, so it will need to be restored on scope exit.
3336 Doing this here saves a lot of doing it manually in perl code (and
3337 forgetting to do it, and consequent subtle errors. */
3338 PL_hints |= HINT_LOCALIZE_HH;
3339 CopHINTHASH_set(&PL_compiling,
3340 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
3345 =for apidoc magic_clearhint
3347 Triggered by a delete from %^H, records the key to
3348 C<PL_compiling.cop_hints_hash>.
3353 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3355 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
3356 PERL_UNUSED_ARG(sv);
3358 PL_hints |= HINT_LOCALIZE_HH;
3359 CopHINTHASH_set(&PL_compiling,
3360 mg->mg_len == HEf_SVKEY
3361 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3362 MUTABLE_SV(mg->mg_ptr), 0, 0)
3363 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3364 mg->mg_ptr, mg->mg_len, 0, 0));
3369 =for apidoc magic_clearhints
3371 Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3376 Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3378 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3379 PERL_UNUSED_ARG(sv);
3380 PERL_UNUSED_ARG(mg);
3381 cophh_free(CopHINTHASH_get(&PL_compiling));
3382 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
3387 Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3388 const char *name, I32 namlen)
3392 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
3393 PERL_UNUSED_ARG(sv);
3394 PERL_UNUSED_ARG(name);
3395 PERL_UNUSED_ARG(namlen);
3397 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3398 nmg = mg_find(nsv, mg->mg_type);
3400 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3401 nmg->mg_ptr = mg->mg_ptr;
3402 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3403 nmg->mg_flags |= MGf_REFCOUNTED;
3409 * c-indentation-style: bsd
3411 * indent-tabs-mode: nil
3414 * ex: set ts=8 sts=4 sw=4 et: