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 $self) to pass to the method.
1733 The C<flags> can be:
1735 G_DISCARD invoke method with G_DISCARD flag and don't
1737 G_UNDEF_FILL fill the stack with argc pointers to
1740 The arguments themselves are any values following the C<flags> argument.
1742 Returns the SV (if any) returned by the method, or NULL on failure.
1749 Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1755 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1759 if (flags & G_WRITING_TO_STDERR) {
1763 SAVESPTR(PL_stderrgv);
1767 PUSHSTACKi(PERLSI_MAGIC);
1771 PUSHs(SvTIED_obj(sv, mg));
1772 if (flags & G_UNDEF_FILL) {
1774 PUSHs(&PL_sv_undef);
1776 } else if (argc > 0) {
1778 va_start(args, argc);
1781 SV *const sv = va_arg(args, SV *);
1788 if (flags & G_DISCARD) {
1789 call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED);
1792 if (call_sv(meth, G_SCALAR|G_METHOD_NAMED))
1793 ret = *PL_stack_sp--;
1796 if (flags & G_WRITING_TO_STDERR)
1802 /* wrapper for magic_methcall that creates the first arg */
1805 S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1810 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1813 if (mg->mg_len >= 0) {
1814 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
1816 else if (mg->mg_len == HEf_SVKEY)
1817 arg1 = MUTABLE_SV(mg->mg_ptr);
1819 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1820 arg1 = newSViv((IV)(mg->mg_len));
1824 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
1826 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
1830 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth)
1834 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1836 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1843 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1845 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1847 if (mg->mg_type == PERL_MAGIC_tiedelem)
1848 mg->mg_flags |= MGf_GSKIP;
1849 magic_methpack(sv,mg,SV_CONST(FETCH));
1854 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1859 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1861 /* in the code C<$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 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3129 PL_sig_name[sig], (gv ? GvENAME(gv)
3136 sv = PL_psig_name[sig]
3137 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3138 : newSVpv(PL_sig_name[sig],0);
3142 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3143 /* make sure our assumption about the size of the SAVEs are correct:
3144 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3145 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3148 PUSHSTACKi(PERLSI_SIGNAL);
3151 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3153 struct sigaction oact;
3155 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
3158 SV *rv = newRV_noinc(MUTABLE_SV(sih));
3159 /* The siginfo fields signo, code, errno, pid, uid,
3160 * addr, status, and band are defined by POSIX/SUSv3. */
3161 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3162 (void)hv_stores(sih, "code", newSViv(sip->si_code));
3163 #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. */
3164 hv_stores(sih, "errno", newSViv(sip->si_errno));
3165 hv_stores(sih, "status", newSViv(sip->si_status));
3166 hv_stores(sih, "uid", newSViv(sip->si_uid));
3167 hv_stores(sih, "pid", newSViv(sip->si_pid));
3168 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3169 hv_stores(sih, "band", newSViv(sip->si_band));
3173 mPUSHp((char *)sip, sizeof(*sip));
3181 errsv_save = newSVsv(ERRSV);
3183 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
3187 SV * const errsv = ERRSV;
3188 if (SvTRUE_NN(errsv)) {
3189 SvREFCNT_dec(errsv_save);
3191 /* Handler "died", for example to get out of a restart-able read().
3192 * Before we re-do that on its behalf re-enable the signal which was
3193 * blocked by the system when we entered.
3195 #ifdef HAS_SIGPROCMASK
3196 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3202 sigaddset(&set,sig);
3203 sigprocmask(SIG_UNBLOCK, &set, NULL);
3206 /* Not clear if this will work */
3207 (void)rsignal(sig, SIG_IGN);
3208 (void)rsignal(sig, PL_csighandlerp);
3210 #endif /* !PERL_MICRO */
3214 sv_setsv(errsv, errsv_save);
3215 SvREFCNT_dec(errsv_save);
3220 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3221 PL_savestack_ix = old_ss_ix;
3223 SvREFCNT_dec_NN(sv);
3224 PL_op = myop; /* Apparently not needed... */
3226 PL_Sv = tSv; /* Restore global temporaries. */
3233 S_restore_magic(pTHX_ const void *p)
3235 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3236 SV* const sv = mgs->mgs_sv;
3242 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3243 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
3244 #ifdef PERL_OLD_COPY_ON_WRITE
3245 /* While magic was saved (and off) sv_setsv may well have seen
3246 this SV as a prime candidate for COW. */
3248 sv_force_normal_flags(sv, 0);
3250 if (mgs->mgs_readonly)
3252 if (mgs->mgs_magical)
3253 SvFLAGS(sv) |= mgs->mgs_magical;
3258 bumped = mgs->mgs_bumped;
3259 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3261 /* If we're still on top of the stack, pop us off. (That condition
3262 * will be satisfied if restore_magic was called explicitly, but *not*
3263 * if it's being called via leave_scope.)
3264 * The reason for doing this is that otherwise, things like sv_2cv()
3265 * may leave alloc gunk on the savestack, and some code
3266 * (e.g. sighandler) doesn't expect that...
3268 if (PL_savestack_ix == mgs->mgs_ss_ix)
3270 UV popval = SSPOPUV;
3271 assert(popval == SAVEt_DESTRUCTOR_X);
3272 PL_savestack_ix -= 2;
3274 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3275 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
3278 if (SvREFCNT(sv) == 1) {
3279 /* We hold the last reference to this SV, which implies that the
3280 SV was deleted as a side effect of the routines we called.
3281 So artificially keep it alive a bit longer.
3282 We avoid turning on the TEMP flag, which can cause the SV's
3283 buffer to get stolen (and maybe other stuff). */
3288 SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */
3292 /* clean up the mess created by Perl_sighandler().
3293 * Note that this is only called during an exit in a signal handler;
3294 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
3298 S_unwind_handler_stack(pTHX_ const void *p)
3302 PL_savestack_ix -= 5; /* Unprotect save in progress. */
3306 =for apidoc magic_sethint
3308 Triggered by a store to %^H, records the key/value pair to
3309 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3310 anything that would need a deep copy. Maybe we should warn if we find a
3316 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3318 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
3319 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
3321 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3323 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3324 an alternative leaf in there, with PL_compiling.cop_hints being used if
3325 it's NULL. If needed for threads, the alternative could lock a mutex,
3326 or take other more complex action. */
3328 /* Something changed in %^H, so it will need to be restored on scope exit.
3329 Doing this here saves a lot of doing it manually in perl code (and
3330 forgetting to do it, and consequent subtle errors. */
3331 PL_hints |= HINT_LOCALIZE_HH;
3332 CopHINTHASH_set(&PL_compiling,
3333 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
3338 =for apidoc magic_clearhint
3340 Triggered by a delete from %^H, records the key to
3341 C<PL_compiling.cop_hints_hash>.
3346 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3348 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
3349 PERL_UNUSED_ARG(sv);
3351 PL_hints |= HINT_LOCALIZE_HH;
3352 CopHINTHASH_set(&PL_compiling,
3353 mg->mg_len == HEf_SVKEY
3354 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3355 MUTABLE_SV(mg->mg_ptr), 0, 0)
3356 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3357 mg->mg_ptr, mg->mg_len, 0, 0));
3362 =for apidoc magic_clearhints
3364 Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3369 Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3371 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3372 PERL_UNUSED_ARG(sv);
3373 PERL_UNUSED_ARG(mg);
3374 cophh_free(CopHINTHASH_get(&PL_compiling));
3375 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
3380 Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3381 const char *name, I32 namlen)
3385 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
3386 PERL_UNUSED_ARG(sv);
3387 PERL_UNUSED_ARG(name);
3388 PERL_UNUSED_ARG(namlen);
3390 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3391 nmg = mg_find(nsv, mg->mg_type);
3393 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3394 nmg->mg_ptr = mg->mg_ptr;
3395 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3396 nmg->mg_flags |= MGf_REFCOUNTED;
3402 * c-indentation-style: bsd
3404 * indent-tabs-mode: nil
3407 * ex: set ts=8 sts=4 sw=4 et: