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
21 "Magic" is special data attached to SV structures in order to give them
22 "magical" properties. When any Perl code tries to read from, or assign to,
23 an SV marked as magical, it calls the 'get' or 'set' function associated
24 with that SV's magic. A get is called prior to reading an SV, in order to
25 give it a chance to update its internal value (get on $. writes the line
26 number of the last read filehandle into the SV's IV slot), while
27 set is called after an SV has been written to, in order to allow it to make
28 use of its changed value (set on $/ copies the SV's new value to the
29 PL_rs global variable).
31 Magic is implemented as a linked list of MAGIC structures attached to the
32 SV. Each MAGIC struct holds the type of the magic, a pointer to an array
33 of functions that implement the get(), set(), length() etc functions,
34 plus space for some flags and pointers. For example, a tied variable has
35 a MAGIC structure that contains a pointer to the object associated with the
44 #if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
50 #if defined(HAS_SETGROUPS)
57 # include <sys/pstat.h>
60 #ifdef HAS_PRCTL_SET_NAME
61 # include <sys/prctl.h>
64 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
65 Signal_t Perl_csighandler(int sig, siginfo_t *, void *);
67 Signal_t Perl_csighandler(int sig);
71 /* Missing protos on LynxOS */
72 void setruid(uid_t id);
73 void seteuid(uid_t id);
74 void setrgid(uid_t id);
75 void setegid(uid_t id);
79 * Pre-magic setup and post-magic takedown.
80 * Use the "DESTRUCTOR" scope cleanup to reinstate magic.
90 /* MGS is typedef'ed to struct magic_state in perl.h */
93 S_save_magic_flags(pTHX_ I32 mgs_ix, SV *sv, U32 flags)
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(pTHX_ SV *sv)
141 PERL_ARGS_ASSERT_MG_MAGICAL;
145 if ((mg = SvMAGIC(sv))) {
147 const MGVTBL* const vtbl = mg->mg_virtual;
149 if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
156 } while ((mg = mg->mg_moremagic));
157 if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)))
165 Do magic before a value is retrieved from the SV. The type of SV must
166 be >= SVt_PVMG. See C<sv_magic>.
172 Perl_mg_get(pTHX_ SV *sv)
175 const I32 mgs_ix = SSNEW(sizeof(MGS));
178 MAGIC *newmg, *head, *cur, *mg;
180 PERL_ARGS_ASSERT_MG_GET;
182 if (PL_localizing == 1 && sv == DEFSV) return 0;
184 /* We must call svt_get(sv, mg) for each valid entry in the linked
185 list of magic. svt_get() may delete the current entry, add new
186 magic to the head of the list, or upgrade the SV. AMS 20010810 */
188 newmg = cur = head = mg = SvMAGIC(sv);
190 const MGVTBL * const vtbl = mg->mg_virtual;
191 MAGIC * const nextmg = mg->mg_moremagic; /* it may delete itself */
193 if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
195 /* taint's mg get is so dumb it doesn't need flag saving */
196 if (!saved && mg->mg_type != PERL_MAGIC_taint) {
197 save_magic(mgs_ix, sv);
201 vtbl->svt_get(aTHX_ sv, mg);
203 /* guard against magic having been deleted - eg FETCH calling
206 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
210 /* recalculate flags if this entry was deleted. */
211 if (mg->mg_flags & MGf_GSKIP)
212 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0;
214 else if (vtbl == &PL_vtbl_utf8) {
215 /* get-magic can reallocate the PV */
216 magic_setutf8(sv, mg);
222 /* Have we finished with the new entries we saw? Start again
223 where we left off (unless there are more new entries). */
231 /* Were any new entries added? */
232 if (!have_new && (newmg = SvMAGIC(sv)) != head) {
236 (SSPTR(mgs_ix, MGS *))->mgs_magical = 0; /* recalculate flags */
241 restore_magic(INT2PTR(void *, (IV)mgs_ix));
249 Do magic after a value is assigned to the SV. See C<sv_magic>.
255 Perl_mg_set(pTHX_ SV *sv)
258 const I32 mgs_ix = SSNEW(sizeof(MGS));
262 PERL_ARGS_ASSERT_MG_SET;
264 if (PL_localizing == 2 && sv == DEFSV) return 0;
266 save_magic_flags(mgs_ix, sv, SVs_GMG|SVs_SMG); /* leave SVs_RMG on */
268 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
269 const MGVTBL* vtbl = mg->mg_virtual;
270 nextmg = mg->mg_moremagic; /* it may delete itself */
271 if (mg->mg_flags & MGf_GSKIP) {
272 mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
273 (SSPTR(mgs_ix, MGS*))->mgs_magical = 0;
275 if (PL_localizing == 2
276 && PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
278 if (vtbl && vtbl->svt_set)
279 vtbl->svt_set(aTHX_ sv, mg);
282 restore_magic(INT2PTR(void*, (IV)mgs_ix));
287 =for apidoc mg_length
289 Reports on the SV's length in bytes, calling length magic if available,
290 but does not set the UTF8 flag on the sv. It will fall back to 'get'
291 magic if there is no 'length' magic, but with no indication as to
292 whether it called 'get' magic. It assumes the sv is a PVMG or
293 higher. Use sv_len() instead.
299 Perl_mg_length(pTHX_ SV *sv)
305 PERL_ARGS_ASSERT_MG_LENGTH;
307 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
308 const MGVTBL * const vtbl = mg->mg_virtual;
309 if (vtbl && vtbl->svt_len) {
310 const I32 mgs_ix = SSNEW(sizeof(MGS));
311 save_magic(mgs_ix, sv);
312 /* omit MGf_GSKIP -- not changed here */
313 len = vtbl->svt_len(aTHX_ sv, mg);
314 restore_magic(INT2PTR(void*, (IV)mgs_ix));
319 (void)SvPV_const(sv, len);
324 Perl_mg_size(pTHX_ SV *sv)
328 PERL_ARGS_ASSERT_MG_SIZE;
330 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
331 const MGVTBL* const vtbl = mg->mg_virtual;
332 if (vtbl && vtbl->svt_len) {
333 const I32 mgs_ix = SSNEW(sizeof(MGS));
335 save_magic(mgs_ix, sv);
336 /* omit MGf_GSKIP -- not changed here */
337 len = vtbl->svt_len(aTHX_ sv, mg);
338 restore_magic(INT2PTR(void*, (IV)mgs_ix));
345 return AvFILLp((const AV *) sv); /* Fallback to non-tied array */
349 Perl_croak(aTHX_ "Size magic not implemented");
358 Clear something magical that the SV represents. See C<sv_magic>.
364 Perl_mg_clear(pTHX_ SV *sv)
366 const I32 mgs_ix = SSNEW(sizeof(MGS));
370 PERL_ARGS_ASSERT_MG_CLEAR;
372 save_magic(mgs_ix, sv);
374 for (mg = SvMAGIC(sv); mg; mg = nextmg) {
375 const MGVTBL* const vtbl = mg->mg_virtual;
376 /* omit GSKIP -- never set here */
378 nextmg = mg->mg_moremagic; /* it may delete itself */
380 if (vtbl && vtbl->svt_clear)
381 vtbl->svt_clear(aTHX_ sv, mg);
384 restore_magic(INT2PTR(void*, (IV)mgs_ix));
389 S_mg_findext_flags(pTHX_ const SV *sv, int type, const MGVTBL *vtbl, U32 flags)
398 assert(!(SvTYPE(sv) == SVt_PVAV && AvPAD_NAMELIST(sv)));
400 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
401 if (mg->mg_type == type && (!flags || mg->mg_virtual == vtbl)) {
413 Finds the magic pointer for type matching the SV. See C<sv_magic>.
419 Perl_mg_find(pTHX_ const SV *sv, int type)
421 return S_mg_findext_flags(aTHX_ sv, type, NULL, 0);
425 =for apidoc mg_findext
427 Finds the magic pointer of C<type> with the given C<vtbl> for the C<SV>. See
434 Perl_mg_findext(pTHX_ const SV *sv, int type, const MGVTBL *vtbl)
436 return S_mg_findext_flags(aTHX_ sv, type, vtbl, 1);
440 Perl_mg_find_mglob(pTHX_ SV *sv)
442 PERL_ARGS_ASSERT_MG_FIND_MGLOB;
443 if (SvTYPE(sv) == SVt_PVLV && LvTYPE(sv) == 'y') {
444 /* This sv is only a delegate. //g magic must be attached to
449 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
450 return S_mg_findext_flags(aTHX_ sv, PERL_MAGIC_regex_global, 0, 0);
457 Copies the magic from one SV to another. See C<sv_magic>.
463 Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
468 PERL_ARGS_ASSERT_MG_COPY;
470 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
471 const MGVTBL* const vtbl = mg->mg_virtual;
472 if ((mg->mg_flags & MGf_COPY) && vtbl->svt_copy){
473 count += vtbl->svt_copy(aTHX_ sv, mg, nsv, key, klen);
476 const char type = mg->mg_type;
477 if (isUPPER(type) && type != PERL_MAGIC_uvar) {
479 (type == PERL_MAGIC_tied)
481 : (type == PERL_MAGIC_regdata && mg->mg_obj)
484 toLOWER(type), key, klen);
493 =for apidoc mg_localize
495 Copy some of the magic from an existing SV to new localized version of that
496 SV. Container magic (eg %ENV, $1, tie)
497 gets copied, value magic doesn't (eg
500 If setmagic is false then no set magic will be called on the new (empty) SV.
501 This typically means that assignment will soon follow (e.g. 'local $x = $y'),
502 and that will handle the magic.
508 Perl_mg_localize(pTHX_ SV *sv, SV *nsv, bool setmagic)
513 PERL_ARGS_ASSERT_MG_LOCALIZE;
518 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
519 const MGVTBL* const vtbl = mg->mg_virtual;
520 if (PERL_MAGIC_TYPE_IS_VALUE_MAGIC(mg->mg_type))
523 if ((mg->mg_flags & MGf_LOCAL) && vtbl->svt_local)
524 (void)vtbl->svt_local(aTHX_ nsv, mg);
526 sv_magicext(nsv, mg->mg_obj, mg->mg_type, vtbl,
527 mg->mg_ptr, mg->mg_len);
529 /* container types should remain read-only across localization */
530 SvFLAGS(nsv) |= SvREADONLY(sv);
533 if (SvTYPE(nsv) >= SVt_PVMG && SvMAGIC(nsv)) {
534 SvFLAGS(nsv) |= SvMAGICAL(sv);
543 #define mg_free_struct(sv, mg) S_mg_free_struct(aTHX_ sv, mg)
545 S_mg_free_struct(pTHX_ SV *sv, MAGIC *mg)
547 const MGVTBL* const vtbl = mg->mg_virtual;
548 if (vtbl && vtbl->svt_free)
549 vtbl->svt_free(aTHX_ sv, mg);
550 if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global) {
551 if (mg->mg_len > 0 || mg->mg_type == PERL_MAGIC_utf8)
552 Safefree(mg->mg_ptr);
553 else if (mg->mg_len == HEf_SVKEY)
554 SvREFCNT_dec(MUTABLE_SV(mg->mg_ptr));
556 if (mg->mg_flags & MGf_REFCOUNTED)
557 SvREFCNT_dec(mg->mg_obj);
564 Free any magic storage used by the SV. See C<sv_magic>.
570 Perl_mg_free(pTHX_ SV *sv)
575 PERL_ARGS_ASSERT_MG_FREE;
577 for (mg = SvMAGIC(sv); mg; mg = moremagic) {
578 moremagic = mg->mg_moremagic;
579 mg_free_struct(sv, mg);
580 SvMAGIC_set(sv, moremagic);
582 SvMAGIC_set(sv, NULL);
588 =for apidoc Am|void|mg_free_type|SV *sv|int how
590 Remove any magic of type I<how> from the SV I<sv>. See L</sv_magic>.
596 Perl_mg_free_type(pTHX_ SV *sv, int how)
598 MAGIC *mg, *prevmg, *moremg;
599 PERL_ARGS_ASSERT_MG_FREE_TYPE;
600 for (prevmg = NULL, mg = SvMAGIC(sv); mg; prevmg = mg, mg = moremg) {
602 moremg = mg->mg_moremagic;
603 if (mg->mg_type == how) {
604 /* temporarily move to the head of the magic chain, in case
605 custom free code relies on this historical aspect of mg_free */
607 prevmg->mg_moremagic = moremg;
608 mg->mg_moremagic = SvMAGIC(sv);
611 newhead = mg->mg_moremagic;
612 mg_free_struct(sv, mg);
613 SvMAGIC_set(sv, newhead);
623 Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
628 PERL_ARGS_ASSERT_MAGIC_REGDATA_CNT;
631 const REGEXP * const rx = PM_GETRE(PL_curpm);
633 if (mg->mg_obj) { /* @+ */
634 /* return the number possible */
635 return RX_NPARENS(rx);
637 I32 paren = RX_LASTPAREN(rx);
639 /* return the last filled */
641 && (RX_OFFS(rx)[paren].start == -1
642 || RX_OFFS(rx)[paren].end == -1) )
655 Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
659 PERL_ARGS_ASSERT_MAGIC_REGDATUM_GET;
662 const REGEXP * const rx = PM_GETRE(PL_curpm);
664 const I32 paren = mg->mg_len;
669 if (paren <= (I32)RX_NPARENS(rx) &&
670 (s = RX_OFFS(rx)[paren].start) != -1 &&
671 (t = RX_OFFS(rx)[paren].end) != -1)
674 if (mg->mg_obj) /* @+ */
679 if (RX_MATCH_UTF8(rx)) {
680 const char * const b = RX_SUBBEG(rx);
682 i = RX_SUBCOFFSET(rx) +
684 (U8*)(b-RX_SUBOFFSET(rx)+i));
699 Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
701 PERL_ARGS_ASSERT_MAGIC_REGDATUM_SET;
704 Perl_croak_no_modify();
705 NORETURN_FUNCTION_END;
708 #define SvRTRIM(sv) STMT_START { \
710 STRLEN len = SvCUR(sv); \
711 char * const p = SvPVX(sv); \
712 while (len > 0 && isSPACE(p[len-1])) \
714 SvCUR_set(sv, len); \
720 Perl_emulate_cop_io(pTHX_ const COP *const c, SV *const sv)
722 PERL_ARGS_ASSERT_EMULATE_COP_IO;
724 if (!(CopHINTS_get(c) & (HINT_LEXICAL_IO_IN|HINT_LEXICAL_IO_OUT)))
725 sv_setsv(sv, &PL_sv_undef);
729 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_IN)) {
730 SV *const value = cop_hints_fetch_pvs(c, "open<", 0);
735 if ((CopHINTS_get(c) & HINT_LEXICAL_IO_OUT)) {
736 SV *const value = cop_hints_fetch_pvs(c, "open>", 0);
744 S_fixup_errno_string(pTHX_ SV* sv)
746 /* Do what is necessary to fixup the non-empty string in 'sv' for return to
749 PERL_ARGS_ASSERT_FIXUP_ERRNO_STRING;
753 if(strEQ(SvPVX(sv), "")) {
754 sv_catpv(sv, UNKNOWN_ERRNO_MSG);
757 /* This is disabled to get v5.20 out the door. It means that $! behaves as
758 * if in the scope of both 'use locale' and 'use bytes'. This can cause
759 * mixed encodings and double utf8 upgrading, See towards the end of the
760 * thread for [perl #119499] */
763 /* In some locales the error string may come back as UTF-8, in which
764 * case we should turn on that flag. This didn't use to happen, and to
765 * avoid any possible backward compatibility issues, we don't turn on
766 * the flag unless we have to. So the flag stays off for an entirely
767 * ASCII string. We assume that if the string looks like UTF-8, it
768 * really is UTF-8: "text in any other encoding that uses bytes with
769 * the high bit set is extremely unlikely to pass a UTF-8 validity
770 * test" (http://en.wikipedia.org/wiki/Charset_detection). There is a
771 * potential that we will get it wrong however, especially on short
772 * error message text. (If it turns out to be necessary, we could also
773 * keep track if the current LC_MESSAGES locale is UTF-8) */
774 if (! IN_BYTES /* respect 'use bytes' */
775 && ! is_ascii_string((U8*) SvPVX_const(sv), SvCUR(sv))
776 && is_utf8_string((U8*) SvPVX_const(sv), SvCUR(sv)))
790 Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
794 const char *s = NULL;
796 const char * const remaining = mg->mg_ptr + 1;
799 PERL_ARGS_ASSERT_MAGIC_GET;
803 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
805 CALLREG_NUMBUF_FETCH(rx,paren,sv);
807 sv_setsv(sv,&PL_sv_undef);
812 nextchar = *remaining;
813 switch (*mg->mg_ptr) {
814 case '\001': /* ^A */
815 if (SvOK(PL_bodytarget)) sv_copypv(sv, PL_bodytarget);
816 else sv_setsv(sv, &PL_sv_undef);
817 if (SvTAINTED(PL_bodytarget))
820 case '\003': /* ^C, ^CHILD_ERROR_NATIVE */
821 if (nextchar == '\0') {
822 sv_setiv(sv, (IV)PL_minus_c);
824 else if (strEQ(remaining, "HILD_ERROR_NATIVE")) {
825 sv_setiv(sv, (IV)STATUS_NATIVE);
829 case '\004': /* ^D */
830 sv_setiv(sv, (IV)(PL_debug & DEBUG_MASK));
832 case '\005': /* ^E */
833 if (nextchar != '\0') {
834 if (strEQ(remaining, "NCODING"))
835 sv_setsv(sv, PL_encoding);
839 #if defined(VMS) || defined(OS2) || defined(WIN32)
843 $DESCRIPTOR(msgdsc,msg);
844 sv_setnv(sv,(NV) vaxc$errno);
845 if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
846 sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
851 if (!(_emx_env & 0x200)) { /* Under DOS */
852 sv_setnv(sv, (NV)errno);
853 sv_setpv(sv, errno ? Strerror(errno) : "");
855 if (errno != errno_isOS2) {
856 const int tmp = _syserrno();
857 if (tmp) /* 2nd call to _syserrno() makes it 0 */
860 sv_setnv(sv, (NV)Perl_rc);
861 sv_setpv(sv, os2error(Perl_rc));
863 if (SvOK(sv) && strNE(SvPVX(sv), "")) {
864 fixup_errno_string(sv);
866 # elif defined(WIN32)
868 const DWORD dwErr = GetLastError();
869 sv_setnv(sv, (NV)dwErr);
871 PerlProc_GetOSError(sv, dwErr);
872 fixup_errno_string(sv);
879 # error Missing code for platform
882 SvNOK_on(sv); /* what a wonderful hack! */
884 #endif /* End of platforms with special handling for $^E; others just fall
891 sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
893 sv_setnv(sv, (NV)errno);
896 if (errno == errno_isOS2 || errno == errno_isOS2_set)
897 sv_setpv(sv, os2error(Perl_rc));
905 /* Strerror can return NULL on some platforms, which will
906 * result in 'sv' not being considered SvOK. The SvNOK_on()
907 * below will cause just the number part to be valid */
908 sv_setpv(sv, Strerror(errno));
910 fixup_errno_string(sv);
917 SvNOK_on(sv); /* what a wonderful hack! */
920 case '\006': /* ^F */
921 sv_setiv(sv, (IV)PL_maxsysfd);
923 case '\007': /* ^GLOBAL_PHASE */
924 if (strEQ(remaining, "LOBAL_PHASE")) {
925 sv_setpvn(sv, PL_phase_names[PL_phase],
926 strlen(PL_phase_names[PL_phase]));
929 case '\010': /* ^H */
930 sv_setiv(sv, (IV)PL_hints);
932 case '\011': /* ^I */ /* NOT \t in EBCDIC */
933 sv_setpv(sv, PL_inplace); /* Will undefine sv if PL_inplace is NULL */
935 case '\014': /* ^LAST_FH */
936 if (strEQ(remaining, "AST_FH")) {
938 assert(isGV_with_GP(PL_last_in_gv));
939 SV_CHECK_THINKFIRST_COW_DROP(sv);
940 prepare_SV_for_RV(sv);
942 SvRV_set(sv, SvREFCNT_inc_simple_NN(PL_last_in_gv));
946 else sv_setsv_nomg(sv, NULL);
949 case '\017': /* ^O & ^OPEN */
950 if (nextchar == '\0') {
951 sv_setpv(sv, PL_osname);
954 else if (strEQ(remaining, "PEN")) {
955 Perl_emulate_cop_io(aTHX_ &PL_compiling, sv);
959 sv_setiv(sv, (IV)PL_perldb);
961 case '\023': /* ^S */
963 if (PL_parser && PL_parser->lex_state != LEX_NOTPARSING)
966 sv_setiv(sv, PL_in_eval & ~(EVAL_INREQUIRE));
971 case '\024': /* ^T */
972 if (nextchar == '\0') {
974 sv_setnv(sv, PL_basetime);
976 sv_setiv(sv, (IV)PL_basetime);
979 else if (strEQ(remaining, "AINT"))
980 sv_setiv(sv, TAINTING_get
981 ? (TAINT_WARN_get || PL_unsafe ? -1 : 1)
984 case '\025': /* $^UNICODE, $^UTF8LOCALE, $^UTF8CACHE */
985 if (strEQ(remaining, "NICODE"))
986 sv_setuv(sv, (UV) PL_unicode);
987 else if (strEQ(remaining, "TF8LOCALE"))
988 sv_setuv(sv, (UV) PL_utf8locale);
989 else if (strEQ(remaining, "TF8CACHE"))
990 sv_setiv(sv, (IV) PL_utf8cache);
992 case '\027': /* ^W & $^WARNING_BITS */
993 if (nextchar == '\0')
994 sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
995 else if (strEQ(remaining, "ARNING_BITS")) {
996 if (PL_compiling.cop_warnings == pWARN_NONE) {
997 sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
999 else if (PL_compiling.cop_warnings == pWARN_STD) {
1000 sv_setsv(sv, &PL_sv_undef);
1003 else if (PL_compiling.cop_warnings == pWARN_ALL) {
1004 /* Get the bit mask for $warnings::Bits{all}, because
1005 * it could have been extended by warnings::register */
1006 HV * const bits = get_hv("warnings::Bits", 0);
1007 SV ** const bits_all = bits ? hv_fetchs(bits, "all", FALSE) : NULL;
1009 sv_copypv(sv, *bits_all);
1011 sv_setpvn(sv, WARN_ALLstring, WARNsize);
1014 sv_setpvn(sv, (char *) (PL_compiling.cop_warnings + 1),
1015 *PL_compiling.cop_warnings);
1020 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
1021 paren = RX_LASTPAREN(rx);
1023 goto do_numbuf_fetch;
1025 sv_setsv(sv,&PL_sv_undef);
1027 case '\016': /* ^N */
1028 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
1029 paren = RX_LASTCLOSEPAREN(rx);
1031 goto do_numbuf_fetch;
1033 sv_setsv(sv,&PL_sv_undef);
1036 if (GvIO(PL_last_in_gv)) {
1037 sv_setiv(sv, (IV)IoLINES(GvIOp(PL_last_in_gv)));
1042 sv_setiv(sv, (IV)STATUS_CURRENT);
1043 #ifdef COMPLEX_STATUS
1044 SvUPGRADE(sv, SVt_PVLV);
1045 LvTARGOFF(sv) = PL_statusvalue;
1046 LvTARGLEN(sv) = PL_statusvalue_vms;
1051 if (GvIOp(PL_defoutgv))
1052 s = IoTOP_NAME(GvIOp(PL_defoutgv));
1056 sv_setpv(sv,GvENAME(PL_defoutgv));
1057 sv_catpvs(sv,"_TOP");
1061 if (GvIOp(PL_defoutgv))
1062 s = IoFMT_NAME(GvIOp(PL_defoutgv));
1064 s = GvENAME(PL_defoutgv);
1068 if (GvIO(PL_defoutgv))
1069 sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
1072 if (GvIO(PL_defoutgv))
1073 sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
1076 if (GvIO(PL_defoutgv))
1077 sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
1087 if (GvIO(PL_defoutgv))
1088 sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
1092 sv_copypv(sv, PL_ors_sv);
1094 sv_setsv(sv, &PL_sv_undef);
1098 IV const pid = (IV)PerlProc_getpid();
1099 if (isGV(mg->mg_obj) || SvIV(mg->mg_obj) != pid) {
1100 /* never set manually, or at least not since last fork */
1102 /* never unsafe, even if reading in a tainted expression */
1105 /* else a value has been assigned manually, so do nothing */
1109 sv_setuid(sv, PerlProc_getuid());
1112 sv_setuid(sv, PerlProc_geteuid());
1115 sv_setgid(sv, PerlProc_getgid());
1118 sv_setgid(sv, PerlProc_getegid());
1120 #ifdef HAS_GETGROUPS
1122 Groups_t *gary = NULL;
1123 I32 i, num_groups = getgroups(0, gary);
1124 Newx(gary, num_groups, Groups_t);
1125 num_groups = getgroups(num_groups, gary);
1126 for (i = 0; i < num_groups; i++)
1127 Perl_sv_catpvf(aTHX_ sv, " %"IVdf, (IV)gary[i]);
1130 (void)SvIOK_on(sv); /* what a wonderful hack! */
1140 Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
1142 struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
1144 PERL_ARGS_ASSERT_MAGIC_GETUVAR;
1146 if (uf && uf->uf_val)
1147 (*uf->uf_val)(aTHX_ uf->uf_index, sv);
1152 Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
1155 STRLEN len = 0, klen;
1156 const char * const key = MgPV_const(mg,klen);
1159 PERL_ARGS_ASSERT_MAGIC_SETENV;
1163 /* defined environment variables are byte strings; unfortunately
1164 there is no SvPVbyte_force_nomg(), so we must do this piecewise */
1165 (void)SvPV_force_nomg_nolen(sv);
1166 sv_utf8_downgrade(sv, /* fail_ok */ TRUE);
1168 Perl_ck_warner_d(aTHX_ packWARN(WARN_UTF8), "Wide character in %s", "setenv");
1174 my_setenv(key, s); /* does the deed */
1176 #ifdef DYNAMIC_ENV_FETCH
1177 /* We just undefd an environment var. Is a replacement */
1178 /* waiting in the wings? */
1180 SV ** const valp = hv_fetch(GvHVn(PL_envgv), key, klen, FALSE);
1182 s = SvOK(*valp) ? SvPV_const(*valp, len) : "";
1186 #if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
1187 /* And you'll never guess what the dog had */
1188 /* in its mouth... */
1190 MgTAINTEDDIR_off(mg);
1192 if (s && klen == 8 && strEQ(key, "DCL$PATH")) {
1193 char pathbuf[256], eltbuf[256], *cp, *elt;
1196 my_strlcpy(eltbuf, s, sizeof(eltbuf));
1198 do { /* DCL$PATH may be a search list */
1199 while (1) { /* as may dev portion of any element */
1200 if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
1201 if ( *(cp+1) == '.' || *(cp+1) == '-' ||
1202 cando_by_name(S_IWUSR,0,elt) ) {
1203 MgTAINTEDDIR_on(mg);
1207 if ((cp = strchr(elt, ':')) != NULL)
1209 if (my_trnlnm(elt, eltbuf, j++))
1215 } while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
1218 if (s && klen == 4 && strEQ(key,"PATH")) {
1219 const char * const strend = s + len;
1221 while (s < strend) {
1225 #ifdef VMS /* Hmm. How do we get $Config{path_sep} from C? */
1226 const char path_sep = '|';
1228 const char path_sep = ':';
1230 s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
1231 s, strend, path_sep, &i);
1233 if (i >= (I32)sizeof tmpbuf /* too long -- assume the worst */
1235 || !strchr(tmpbuf, ':') /* no colon thus no device name -- assume relative path */
1237 || *tmpbuf != '/' /* no starting slash -- assume relative path */
1239 || (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
1240 MgTAINTEDDIR_on(mg);
1246 #endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
1252 Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
1254 PERL_ARGS_ASSERT_MAGIC_CLEARENV;
1255 PERL_UNUSED_ARG(sv);
1256 my_setenv(MgPV_nolen_const(mg),NULL);
1261 Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
1264 PERL_ARGS_ASSERT_MAGIC_SET_ALL_ENV;
1265 PERL_UNUSED_ARG(mg);
1267 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1269 if (PL_localizing) {
1272 hv_iterinit(MUTABLE_HV(sv));
1273 while ((entry = hv_iternext(MUTABLE_HV(sv)))) {
1275 my_setenv(hv_iterkey(entry, &keylen),
1276 SvPV_nolen_const(hv_iterval(MUTABLE_HV(sv), entry)));
1284 Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
1287 PERL_ARGS_ASSERT_MAGIC_CLEAR_ALL_ENV;
1288 PERL_UNUSED_ARG(sv);
1289 PERL_UNUSED_ARG(mg);
1291 Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
1299 #ifdef HAS_SIGPROCMASK
1301 restore_sigmask(pTHX_ SV *save_sv)
1303 const sigset_t * const ossetp = (const sigset_t *) SvPV_nolen_const( save_sv );
1304 (void)sigprocmask(SIG_SETMASK, ossetp, NULL);
1308 Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
1311 /* Are we fetching a signal entry? */
1312 int i = (I16)mg->mg_private;
1314 PERL_ARGS_ASSERT_MAGIC_GETSIG;
1318 const char * sig = MgPV_const(mg, siglen);
1319 mg->mg_private = i = whichsig_pvn(sig, siglen);
1324 sv_setsv(sv,PL_psig_ptr[i]);
1326 Sighandler_t sigstate = rsignal_state(i);
1327 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1328 if (PL_sig_handlers_initted && PL_sig_ignoring[i])
1331 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1332 if (PL_sig_handlers_initted && PL_sig_defaulting[i])
1335 /* cache state so we don't fetch it again */
1336 if(sigstate == (Sighandler_t) SIG_IGN)
1337 sv_setpvs(sv,"IGNORE");
1339 sv_setsv(sv,&PL_sv_undef);
1340 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1347 Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
1349 PERL_ARGS_ASSERT_MAGIC_CLEARSIG;
1351 magic_setsig(NULL, mg);
1352 return sv_unmagic(sv, mg->mg_type);
1356 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1357 Perl_csighandler(int sig, siginfo_t *sip PERL_UNUSED_DECL, void *uap PERL_UNUSED_DECL)
1359 Perl_csighandler(int sig)
1362 #ifdef PERL_GET_SIG_CONTEXT
1363 dTHXa(PERL_GET_SIG_CONTEXT);
1367 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1368 (void) rsignal(sig, PL_csighandlerp);
1369 if (PL_sig_ignoring[sig]) return;
1371 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1372 if (PL_sig_defaulting[sig])
1373 #ifdef KILL_BY_SIGPRC
1374 exit((Perl_sig_to_vmscondition(sig)&STS$M_COND_ID)|STS$K_SEVERE|STS$M_INHIB_MSG);
1389 (PL_signals & PERL_SIGNALS_UNSAFE_FLAG))
1390 /* Call the perl level handler now--
1391 * with risk we may be in malloc() or being destructed etc. */
1392 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1393 (*PL_sighandlerp)(sig, NULL, NULL);
1395 (*PL_sighandlerp)(sig);
1398 if (!PL_psig_pend) return;
1399 /* Set a flag to say this signal is pending, that is awaiting delivery after
1400 * the current Perl opcode completes */
1401 PL_psig_pend[sig]++;
1403 #ifndef SIG_PENDING_DIE_COUNT
1404 # define SIG_PENDING_DIE_COUNT 120
1406 /* Add one to say _a_ signal is pending */
1407 if (++PL_sig_pending >= SIG_PENDING_DIE_COUNT)
1408 Perl_croak(aTHX_ "Maximal count of pending signals (%lu) exceeded",
1409 (unsigned long)SIG_PENDING_DIE_COUNT);
1413 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1415 Perl_csighandler_init(void)
1418 if (PL_sig_handlers_initted) return;
1420 for (sig = 1; sig < SIG_SIZE; sig++) {
1421 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1423 PL_sig_defaulting[sig] = 1;
1424 (void) rsignal(sig, PL_csighandlerp);
1426 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1427 PL_sig_ignoring[sig] = 0;
1430 PL_sig_handlers_initted = 1;
1434 #if defined HAS_SIGPROCMASK
1436 unblock_sigmask(pTHX_ void* newset)
1438 sigprocmask(SIG_UNBLOCK, (sigset_t*)newset, NULL);
1443 Perl_despatch_signals(pTHX)
1448 for (sig = 1; sig < SIG_SIZE; sig++) {
1449 if (PL_psig_pend[sig]) {
1451 #ifdef HAS_SIGPROCMASK
1452 /* From sigaction(2) (FreeBSD man page):
1453 * | Signal routines normally execute with the signal that
1454 * | caused their invocation blocked, but other signals may
1456 * Emulation of this behavior (from within Perl) is enabled
1460 sigset_t newset, oldset;
1462 sigemptyset(&newset);
1463 sigaddset(&newset, sig);
1464 sigprocmask(SIG_BLOCK, &newset, &oldset);
1465 was_blocked = sigismember(&oldset, sig);
1467 SV* save_sv = newSVpvn((char *)(&newset), sizeof(sigset_t));
1469 SAVEFREESV(save_sv);
1470 SAVEDESTRUCTOR_X(unblock_sigmask, SvPV_nolen(save_sv));
1473 PL_psig_pend[sig] = 0;
1474 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
1475 (*PL_sighandlerp)(sig, NULL, NULL);
1477 (*PL_sighandlerp)(sig);
1479 #ifdef HAS_SIGPROCMASK
1488 /* sv of NULL signifies that we're acting as magic_clearsig. */
1490 Perl_magic_setsig(pTHX_ SV *sv, MAGIC *mg)
1495 /* Need to be careful with SvREFCNT_dec(), because that can have side
1496 * effects (due to closures). We must make sure that the new disposition
1497 * is in place before it is called.
1501 #ifdef HAS_SIGPROCMASK
1505 const char *s = MgPV_const(mg,len);
1507 PERL_ARGS_ASSERT_MAGIC_SETSIG;
1510 if (memEQs(s, len, "__DIE__"))
1512 else if (memEQs(s, len, "__WARN__")
1513 && (sv ? 1 : PL_warnhook != PERL_WARNHOOK_FATAL)) {
1514 /* Merge the existing behaviours, which are as follows:
1515 magic_setsig, we always set svp to &PL_warnhook
1516 (hence we always change the warnings handler)
1517 For magic_clearsig, we don't change the warnings handler if it's
1518 set to the &PL_warnhook. */
1521 SV *tmp = sv_newmortal();
1522 Perl_croak(aTHX_ "No such hook: %s",
1523 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1527 if (*svp != PERL_WARNHOOK_FATAL)
1533 i = (I16)mg->mg_private;
1535 i = whichsig_pvn(s, len); /* ...no, a brick */
1536 mg->mg_private = (U16)i;
1540 SV *tmp = sv_newmortal();
1541 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "No such signal: SIG%s",
1542 pv_pretty(tmp, s, len, 0, NULL, NULL, 0));
1546 #ifdef HAS_SIGPROCMASK
1547 /* Avoid having the signal arrive at a bad time, if possible. */
1550 sigprocmask(SIG_BLOCK, &set, &save);
1552 save_sv = newSVpvn((char *)(&save), sizeof(sigset_t));
1553 SAVEFREESV(save_sv);
1554 SAVEDESTRUCTOR_X(restore_sigmask, save_sv);
1557 #if defined(FAKE_PERSISTENT_SIGNAL_HANDLERS) || defined(FAKE_DEFAULT_SIGNAL_HANDLERS)
1558 if (!PL_sig_handlers_initted) Perl_csighandler_init();
1560 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1561 PL_sig_ignoring[i] = 0;
1563 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1564 PL_sig_defaulting[i] = 0;
1566 to_dec = PL_psig_ptr[i];
1568 PL_psig_ptr[i] = SvREFCNT_inc_simple_NN(sv);
1569 SvTEMP_off(sv); /* Make sure it doesn't go away on us */
1571 /* Signals don't change name during the program's execution, so once
1572 they're cached in the appropriate slot of PL_psig_name, they can
1575 Ideally we'd find some way of making SVs at (C) compile time, or
1576 at least, doing most of the work. */
1577 if (!PL_psig_name[i]) {
1578 PL_psig_name[i] = newSVpvn(s, len);
1579 SvREADONLY_on(PL_psig_name[i]);
1582 SvREFCNT_dec(PL_psig_name[i]);
1583 PL_psig_name[i] = NULL;
1584 PL_psig_ptr[i] = NULL;
1587 if (sv && (isGV_with_GP(sv) || SvROK(sv))) {
1589 (void)rsignal(i, PL_csighandlerp);
1592 *svp = SvREFCNT_inc_simple_NN(sv);
1594 if (sv && SvOK(sv)) {
1595 s = SvPV_force(sv, len);
1599 if (sv && memEQs(s, len,"IGNORE")) {
1601 #ifdef FAKE_PERSISTENT_SIGNAL_HANDLERS
1602 PL_sig_ignoring[i] = 1;
1603 (void)rsignal(i, PL_csighandlerp);
1605 (void)rsignal(i, (Sighandler_t) SIG_IGN);
1609 else if (!sv || memEQs(s, len,"DEFAULT") || !len) {
1611 #ifdef FAKE_DEFAULT_SIGNAL_HANDLERS
1612 PL_sig_defaulting[i] = 1;
1613 (void)rsignal(i, PL_csighandlerp);
1615 (void)rsignal(i, (Sighandler_t) SIG_DFL);
1621 * We should warn if HINT_STRICT_REFS, but without
1622 * access to a known hint bit in a known OP, we can't
1623 * tell whether HINT_STRICT_REFS is in force or not.
1625 if (!strchr(s,':') && !strchr(s,'\''))
1626 Perl_sv_insert_flags(aTHX_ sv, 0, 0, STR_WITH_LEN("main::"),
1629 (void)rsignal(i, PL_csighandlerp);
1631 *svp = SvREFCNT_inc_simple_NN(sv);
1635 #ifdef HAS_SIGPROCMASK
1639 SvREFCNT_dec(to_dec);
1642 #endif /* !PERL_MICRO */
1645 Perl_magic_setisa(pTHX_ SV *sv, MAGIC *mg)
1648 PERL_ARGS_ASSERT_MAGIC_SETISA;
1649 PERL_UNUSED_ARG(sv);
1651 /* Skip _isaelem because _isa will handle it shortly */
1652 if (PL_delaymagic & DM_ARRAY_ISA && mg->mg_type == PERL_MAGIC_isaelem)
1655 return magic_clearisa(NULL, mg);
1658 /* sv of NULL signifies that we're acting as magic_setisa. */
1660 Perl_magic_clearisa(pTHX_ SV *sv, MAGIC *mg)
1665 PERL_ARGS_ASSERT_MAGIC_CLEARISA;
1667 /* Bail out if destruction is going on */
1668 if(PL_phase == PERL_PHASE_DESTRUCT) return 0;
1671 av_clear(MUTABLE_AV(sv));
1673 if (SvTYPE(mg->mg_obj) != SVt_PVGV && SvSMAGICAL(mg->mg_obj))
1674 /* This occurs with setisa_elem magic, which calls this
1676 mg = mg_find(mg->mg_obj, PERL_MAGIC_isa);
1678 if (SvTYPE(mg->mg_obj) == SVt_PVAV) { /* multiple stashes */
1679 SV **svp = AvARRAY((AV *)mg->mg_obj);
1680 I32 items = AvFILLp((AV *)mg->mg_obj) + 1;
1682 stash = GvSTASH((GV *)*svp++);
1683 if (stash && HvENAME(stash)) mro_isa_changed_in(stash);
1690 (const GV *)mg->mg_obj
1693 /* The stash may have been detached from the symbol table, so check its
1694 name before doing anything. */
1695 if (stash && HvENAME_get(stash))
1696 mro_isa_changed_in(stash);
1702 Perl_magic_getnkeys(pTHX_ SV *sv, MAGIC *mg)
1704 HV * const hv = MUTABLE_HV(LvTARG(sv));
1707 PERL_ARGS_ASSERT_MAGIC_GETNKEYS;
1708 PERL_UNUSED_ARG(mg);
1711 (void) hv_iterinit(hv);
1712 if (! SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
1715 while (hv_iternext(hv))
1720 sv_setiv(sv, (IV)i);
1725 Perl_magic_setnkeys(pTHX_ SV *sv, MAGIC *mg)
1727 PERL_ARGS_ASSERT_MAGIC_SETNKEYS;
1728 PERL_UNUSED_ARG(mg);
1730 hv_ksplit(MUTABLE_HV(LvTARG(sv)), SvIV(sv));
1736 =for apidoc magic_methcall
1738 Invoke a magic method (like FETCH).
1740 C<sv> and C<mg> are the tied thingy and the tie magic.
1742 C<meth> is the name of the method to call.
1744 C<argc> is the number of args (in addition to $self) to pass to the method.
1746 The C<flags> can be:
1748 G_DISCARD invoke method with G_DISCARD flag and don't
1750 G_UNDEF_FILL fill the stack with argc pointers to
1753 The arguments themselves are any values following the C<flags> argument.
1755 Returns the SV (if any) returned by the method, or NULL on failure.
1762 Perl_magic_methcall(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1769 PERL_ARGS_ASSERT_MAGIC_METHCALL;
1773 if (flags & G_WRITING_TO_STDERR) {
1777 SAVESPTR(PL_stderrgv);
1781 PUSHSTACKi(PERLSI_MAGIC);
1785 PUSHs(SvTIED_obj(sv, mg));
1786 if (flags & G_UNDEF_FILL) {
1788 PUSHs(&PL_sv_undef);
1790 } else if (argc > 0) {
1792 va_start(args, argc);
1795 SV *const sv = va_arg(args, SV *);
1802 if (flags & G_DISCARD) {
1803 call_sv(meth, G_SCALAR|G_DISCARD|G_METHOD_NAMED);
1806 if (call_sv(meth, G_SCALAR|G_METHOD_NAMED))
1807 ret = *PL_stack_sp--;
1810 if (flags & G_WRITING_TO_STDERR)
1816 /* wrapper for magic_methcall that creates the first arg */
1819 S_magic_methcall1(pTHX_ SV *sv, const MAGIC *mg, SV *meth, U32 flags,
1825 PERL_ARGS_ASSERT_MAGIC_METHCALL1;
1828 if (mg->mg_len >= 0) {
1829 arg1 = newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
1831 else if (mg->mg_len == HEf_SVKEY)
1832 arg1 = MUTABLE_SV(mg->mg_ptr);
1834 else if (mg->mg_type == PERL_MAGIC_tiedelem) {
1835 arg1 = newSViv((IV)(mg->mg_len));
1839 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n - 1, val);
1841 return Perl_magic_methcall(aTHX_ sv, mg, meth, flags, n, arg1, val);
1845 S_magic_methpack(pTHX_ SV *sv, const MAGIC *mg, SV *meth)
1850 PERL_ARGS_ASSERT_MAGIC_METHPACK;
1852 ret = magic_methcall1(sv, mg, meth, 0, 1, NULL);
1859 Perl_magic_getpack(pTHX_ SV *sv, MAGIC *mg)
1861 PERL_ARGS_ASSERT_MAGIC_GETPACK;
1863 if (mg->mg_type == PERL_MAGIC_tiedelem)
1864 mg->mg_flags |= MGf_GSKIP;
1865 magic_methpack(sv,mg,SV_CONST(FETCH));
1870 Perl_magic_setpack(pTHX_ SV *sv, MAGIC *mg)
1876 PERL_ARGS_ASSERT_MAGIC_SETPACK;
1878 /* in the code C<$tied{foo} = $val>, the "thing" that gets passed to
1879 * STORE() is not $val, but rather a PVLV (the sv in this call), whose
1880 * public flags indicate its value based on copying from $val. Doing
1881 * mg_set() on the PVLV temporarily does SvMAGICAL_off(), then calls us.
1882 * So STORE()'s $_[2] arg is a temporarily disarmed PVLV. This goes
1883 * wrong if $val happened to be tainted, as sv hasn't got magic
1884 * enabled, even though taint magic is in the chain. In which case,
1885 * fake up a temporary tainted value (this is easier than temporarily
1886 * re-enabling magic on sv). */
1888 if (TAINTING_get && (tmg = mg_find(sv, PERL_MAGIC_taint))
1889 && (tmg->mg_len & 1))
1891 val = sv_mortalcopy(sv);
1897 magic_methcall1(sv, mg, SV_CONST(STORE), G_DISCARD, 2, val);
1902 Perl_magic_clearpack(pTHX_ SV *sv, MAGIC *mg)
1904 PERL_ARGS_ASSERT_MAGIC_CLEARPACK;
1906 if (mg->mg_type == PERL_MAGIC_tiedscalar) return 0;
1907 return magic_methpack(sv,mg,SV_CONST(DELETE));
1912 Perl_magic_sizepack(pTHX_ SV *sv, MAGIC *mg)
1918 PERL_ARGS_ASSERT_MAGIC_SIZEPACK;
1920 retsv = magic_methcall1(sv, mg, SV_CONST(FETCHSIZE), 0, 1, NULL);
1922 retval = SvIV(retsv)-1;
1924 Perl_croak(aTHX_ "FETCHSIZE returned a negative value");
1926 return (U32) retval;
1930 Perl_magic_wipepack(pTHX_ SV *sv, MAGIC *mg)
1934 PERL_ARGS_ASSERT_MAGIC_WIPEPACK;
1936 Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(CLEAR), G_DISCARD, 0);
1941 Perl_magic_nextpack(pTHX_ SV *sv, MAGIC *mg, SV *key)
1946 PERL_ARGS_ASSERT_MAGIC_NEXTPACK;
1948 ret = SvOK(key) ? Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(NEXTKEY), 0, 1, key)
1949 : Perl_magic_methcall(aTHX_ sv, mg, SV_CONST(FIRSTKEY), 0, 0);
1956 Perl_magic_existspack(pTHX_ SV *sv, const MAGIC *mg)
1958 PERL_ARGS_ASSERT_MAGIC_EXISTSPACK;
1960 return magic_methpack(sv,mg,SV_CONST(EXISTS));
1964 Perl_magic_scalarpack(pTHX_ HV *hv, MAGIC *mg)
1968 SV * const tied = SvTIED_obj(MUTABLE_SV(hv), mg);
1969 HV * const pkg = SvSTASH((const SV *)SvRV(tied));
1971 PERL_ARGS_ASSERT_MAGIC_SCALARPACK;
1973 if (!gv_fetchmethod_autoload(pkg, "SCALAR", FALSE)) {
1975 if (HvEITER_get(hv))
1976 /* we are in an iteration so the hash cannot be empty */
1978 /* no xhv_eiter so now use FIRSTKEY */
1979 key = sv_newmortal();
1980 magic_nextpack(MUTABLE_SV(hv), mg, key);
1981 HvEITER_set(hv, NULL); /* need to reset iterator */
1982 return SvOK(key) ? &PL_sv_yes : &PL_sv_no;
1985 /* there is a SCALAR method that we can call */
1986 retval = Perl_magic_methcall(aTHX_ MUTABLE_SV(hv), mg, SV_CONST(SCALAR), 0, 0);
1988 retval = &PL_sv_undef;
1993 Perl_magic_setdbline(pTHX_ SV *sv, MAGIC *mg)
1998 PERL_ARGS_ASSERT_MAGIC_SETDBLINE;
2000 /* The magic ptr/len for the debugger's hash should always be an SV. */
2001 if (UNLIKELY(mg->mg_len != HEf_SVKEY)) {
2002 Perl_croak(aTHX_ "panic: magic_setdbline len=%"IVdf", ptr='%s'",
2003 (IV)mg->mg_len, mg->mg_ptr);
2006 /* Use sv_2iv instead of SvIV() as the former generates smaller code, and
2007 setting/clearing debugger breakpoints is not a hot path. */
2008 svp = av_fetch(MUTABLE_AV(mg->mg_obj),
2009 sv_2iv(MUTABLE_SV((mg)->mg_ptr)), FALSE);
2011 if (svp && SvIOKp(*svp)) {
2012 OP * const o = INT2PTR(OP*,SvIVX(*svp));
2014 #ifdef PERL_DEBUG_READONLY_OPS
2015 Slab_to_rw(OpSLAB(o));
2017 /* set or clear breakpoint in the relevant control op */
2019 o->op_flags |= OPf_SPECIAL;
2021 o->op_flags &= ~OPf_SPECIAL;
2022 #ifdef PERL_DEBUG_READONLY_OPS
2023 Slab_to_ro(OpSLAB(o));
2031 Perl_magic_getarylen(pTHX_ SV *sv, const MAGIC *mg)
2034 AV * const obj = MUTABLE_AV(mg->mg_obj);
2036 PERL_ARGS_ASSERT_MAGIC_GETARYLEN;
2039 sv_setiv(sv, AvFILL(obj));
2047 Perl_magic_setarylen(pTHX_ SV *sv, MAGIC *mg)
2050 AV * const obj = MUTABLE_AV(mg->mg_obj);
2052 PERL_ARGS_ASSERT_MAGIC_SETARYLEN;
2055 av_fill(obj, SvIV(sv));
2057 Perl_ck_warner(aTHX_ packWARN(WARN_MISC),
2058 "Attempt to set length of freed array");
2064 Perl_magic_cleararylen_p(pTHX_ SV *sv, MAGIC *mg)
2068 PERL_ARGS_ASSERT_MAGIC_CLEARARYLEN_P;
2069 PERL_UNUSED_ARG(sv);
2071 /* Reset the iterator when the array is cleared */
2072 #if IVSIZE == I32SIZE
2073 *((IV *) &(mg->mg_len)) = 0;
2076 *((IV *) mg->mg_ptr) = 0;
2083 Perl_magic_freearylen_p(pTHX_ SV *sv, MAGIC *mg)
2087 PERL_ARGS_ASSERT_MAGIC_FREEARYLEN_P;
2088 PERL_UNUSED_ARG(sv);
2090 /* during global destruction, mg_obj may already have been freed */
2091 if (PL_in_clean_all)
2094 mg = mg_find (mg->mg_obj, PERL_MAGIC_arylen);
2097 /* arylen scalar holds a pointer back to the array, but doesn't own a
2098 reference. Hence the we (the array) are about to go away with it
2099 still pointing at us. Clear its pointer, else it would be pointing
2100 at free memory. See the comment in sv_magic about reference loops,
2101 and why it can't own a reference to us. */
2108 Perl_magic_getpos(pTHX_ SV *sv, MAGIC *mg)
2111 SV* const lsv = LvTARG(sv);
2112 MAGIC * const found = mg_find_mglob(lsv);
2114 PERL_ARGS_ASSERT_MAGIC_GETPOS;
2115 PERL_UNUSED_ARG(mg);
2117 if (found && found->mg_len != -1) {
2118 STRLEN i = found->mg_len;
2119 if (found->mg_flags & MGf_BYTES && DO_UTF8(lsv))
2120 i = sv_pos_b2u_flags(lsv, i, SV_GMAGIC|SV_CONST_RETURN);
2129 Perl_magic_setpos(pTHX_ SV *sv, MAGIC *mg)
2132 SV* const lsv = LvTARG(sv);
2139 PERL_ARGS_ASSERT_MAGIC_SETPOS;
2140 PERL_UNUSED_ARG(mg);
2142 found = mg_find_mglob(lsv);
2146 found = sv_magicext_mglob(lsv);
2148 else if (!SvOK(sv)) {
2152 s = SvPV_const(lsv, len);
2157 ulen = sv_or_pv_len_utf8(lsv, s, len);
2167 else if (pos > (SSize_t)len)
2170 found->mg_len = pos;
2171 found->mg_flags &= ~(MGf_MINMATCH|MGf_BYTES);
2177 Perl_magic_getsubstr(pTHX_ SV *sv, MAGIC *mg)
2180 SV * const lsv = LvTARG(sv);
2181 const char * const tmps = SvPV_const(lsv,len);
2182 STRLEN offs = LvTARGOFF(sv);
2183 STRLEN rem = LvTARGLEN(sv);
2184 const bool negoff = LvFLAGS(sv) & 1;
2185 const bool negrem = LvFLAGS(sv) & 2;
2187 PERL_ARGS_ASSERT_MAGIC_GETSUBSTR;
2188 PERL_UNUSED_ARG(mg);
2190 if (!translate_substr_offsets(
2191 SvUTF8(lsv) ? sv_or_pv_len_utf8(lsv, tmps, len) : len,
2192 negoff ? -(IV)offs : (IV)offs, !negoff,
2193 negrem ? -(IV)rem : (IV)rem, !negrem, &offs, &rem
2195 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR), "substr outside of string");
2196 sv_setsv_nomg(sv, &PL_sv_undef);
2201 offs = sv_or_pv_pos_u2b(lsv, tmps, offs, &rem);
2202 sv_setpvn(sv, tmps + offs, rem);
2209 Perl_magic_setsubstr(pTHX_ SV *sv, MAGIC *mg)
2212 STRLEN len, lsv_len, oldtarglen, newtarglen;
2213 const char * const tmps = SvPV_const(sv, len);
2214 SV * const lsv = LvTARG(sv);
2215 STRLEN lvoff = LvTARGOFF(sv);
2216 STRLEN lvlen = LvTARGLEN(sv);
2217 const bool negoff = LvFLAGS(sv) & 1;
2218 const bool neglen = LvFLAGS(sv) & 2;
2220 PERL_ARGS_ASSERT_MAGIC_SETSUBSTR;
2221 PERL_UNUSED_ARG(mg);
2225 Perl_ck_warner(aTHX_ packWARN(WARN_SUBSTR),
2226 "Attempt to use reference as lvalue in substr"
2228 SvPV_force_nomg(lsv,lsv_len);
2229 if (SvUTF8(lsv)) lsv_len = sv_len_utf8_nomg(lsv);
2230 if (!translate_substr_offsets(
2232 negoff ? -(IV)lvoff : (IV)lvoff, !negoff,
2233 neglen ? -(IV)lvlen : (IV)lvlen, !neglen, &lvoff, &lvlen
2235 Perl_croak(aTHX_ "substr outside of string");
2238 sv_utf8_upgrade_nomg(lsv);
2239 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
2240 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
2241 newtarglen = sv_or_pv_len_utf8(sv, tmps, len);
2244 else if (SvUTF8(lsv)) {
2246 lvoff = sv_pos_u2b_flags(lsv, lvoff, &lvlen, SV_CONST_RETURN);
2248 utf8 = (char*)bytes_to_utf8((U8*)tmps, &len);
2249 sv_insert_flags(lsv, lvoff, lvlen, utf8, len, 0);
2253 sv_insert_flags(lsv, lvoff, lvlen, tmps, len, 0);
2256 if (!neglen) LvTARGLEN(sv) = newtarglen;
2257 if (negoff) LvTARGOFF(sv) += newtarglen - oldtarglen;
2263 Perl_magic_gettaint(pTHX_ SV *sv, MAGIC *mg)
2267 PERL_ARGS_ASSERT_MAGIC_GETTAINT;
2268 PERL_UNUSED_ARG(sv);
2269 #ifdef NO_TAINT_SUPPORT
2270 PERL_UNUSED_ARG(mg);
2273 TAINT_IF((PL_localizing != 1) && (mg->mg_len & 1));
2278 Perl_magic_settaint(pTHX_ SV *sv, MAGIC *mg)
2282 PERL_ARGS_ASSERT_MAGIC_SETTAINT;
2283 PERL_UNUSED_ARG(sv);
2285 /* update taint status */
2294 Perl_magic_getvec(pTHX_ SV *sv, MAGIC *mg)
2296 SV * const lsv = LvTARG(sv);
2298 PERL_ARGS_ASSERT_MAGIC_GETVEC;
2299 PERL_UNUSED_ARG(mg);
2301 sv_setuv(sv, do_vecget(lsv, LvTARGOFF(sv), LvTARGLEN(sv)));
2307 Perl_magic_setvec(pTHX_ SV *sv, MAGIC *mg)
2309 PERL_ARGS_ASSERT_MAGIC_SETVEC;
2310 PERL_UNUSED_ARG(mg);
2311 do_vecset(sv); /* XXX slurp this routine */
2316 Perl_defelem_target(pTHX_ SV *sv, MAGIC *mg)
2320 PERL_ARGS_ASSERT_DEFELEM_TARGET;
2321 if (!mg) mg = mg_find(sv, PERL_MAGIC_defelem);
2323 if (LvTARGLEN(sv)) {
2325 SV * const ahv = LvTARG(sv);
2326 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, FALSE, 0);
2330 else if (LvSTARGOFF(sv) >= 0) {
2331 AV *const av = MUTABLE_AV(LvTARG(sv));
2332 if (LvSTARGOFF(sv) <= AvFILL(av))
2334 if (SvRMAGICAL(av)) {
2335 SV * const * const svp = av_fetch(av, LvSTARGOFF(sv), 0);
2336 targ = svp ? *svp : NULL;
2339 targ = AvARRAY(av)[LvSTARGOFF(sv)];
2342 if (targ && (targ != &PL_sv_undef)) {
2343 /* somebody else defined it for us */
2344 SvREFCNT_dec(LvTARG(sv));
2345 LvTARG(sv) = SvREFCNT_inc_simple_NN(targ);
2347 SvREFCNT_dec(mg->mg_obj);
2349 mg->mg_flags &= ~MGf_REFCOUNTED;
2358 Perl_magic_getdefelem(pTHX_ SV *sv, MAGIC *mg)
2360 PERL_ARGS_ASSERT_MAGIC_GETDEFELEM;
2362 sv_setsv(sv, defelem_target(sv, mg));
2367 Perl_magic_setdefelem(pTHX_ SV *sv, MAGIC *mg)
2369 PERL_ARGS_ASSERT_MAGIC_SETDEFELEM;
2370 PERL_UNUSED_ARG(mg);
2374 sv_setsv(LvTARG(sv), sv);
2375 SvSETMAGIC(LvTARG(sv));
2381 Perl_vivify_defelem(pTHX_ SV *sv)
2387 PERL_ARGS_ASSERT_VIVIFY_DEFELEM;
2389 if (!LvTARGLEN(sv) || !(mg = mg_find(sv, PERL_MAGIC_defelem)))
2392 SV * const ahv = LvTARG(sv);
2393 HE * const he = hv_fetch_ent(MUTABLE_HV(ahv), mg->mg_obj, TRUE, 0);
2396 if (!value || value == &PL_sv_undef)
2397 Perl_croak(aTHX_ PL_no_helem_sv, SVfARG(mg->mg_obj));
2399 else if (LvSTARGOFF(sv) < 0)
2400 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
2402 AV *const av = MUTABLE_AV(LvTARG(sv));
2403 if ((I32)LvTARGLEN(sv) < 0 && LvSTARGOFF(sv) > AvFILL(av))
2404 LvTARG(sv) = NULL; /* array can't be extended */
2406 SV* const * const svp = av_fetch(av, LvSTARGOFF(sv), TRUE);
2407 if (!svp || !(value = *svp))
2408 Perl_croak(aTHX_ PL_no_aelem, LvSTARGOFF(sv));
2411 SvREFCNT_inc_simple_void(value);
2412 SvREFCNT_dec(LvTARG(sv));
2415 SvREFCNT_dec(mg->mg_obj);
2417 mg->mg_flags &= ~MGf_REFCOUNTED;
2421 Perl_magic_killbackrefs(pTHX_ SV *sv, MAGIC *mg)
2423 PERL_ARGS_ASSERT_MAGIC_KILLBACKREFS;
2424 Perl_sv_kill_backrefs(aTHX_ sv, MUTABLE_AV(mg->mg_obj));
2429 Perl_magic_setmglob(pTHX_ SV *sv, MAGIC *mg)
2431 PERL_ARGS_ASSERT_MAGIC_SETMGLOB;
2432 PERL_UNUSED_CONTEXT;
2433 PERL_UNUSED_ARG(sv);
2439 Perl_magic_setuvar(pTHX_ SV *sv, MAGIC *mg)
2441 const struct ufuncs * const uf = (struct ufuncs *)mg->mg_ptr;
2443 PERL_ARGS_ASSERT_MAGIC_SETUVAR;
2445 if (uf && uf->uf_set)
2446 (*uf->uf_set)(aTHX_ uf->uf_index, sv);
2451 Perl_magic_setregexp(pTHX_ SV *sv, MAGIC *mg)
2453 const char type = mg->mg_type;
2455 PERL_ARGS_ASSERT_MAGIC_SETREGEXP;
2457 if (type == PERL_MAGIC_qr) {
2458 } else if (type == PERL_MAGIC_bm) {
2462 assert(type == PERL_MAGIC_fm);
2464 return sv_unmagic(sv, type);
2467 #ifdef USE_LOCALE_COLLATE
2469 Perl_magic_setcollxfrm(pTHX_ SV *sv, MAGIC *mg)
2471 PERL_ARGS_ASSERT_MAGIC_SETCOLLXFRM;
2474 * RenE<eacute> Descartes said "I think not."
2475 * and vanished with a faint plop.
2477 PERL_UNUSED_CONTEXT;
2478 PERL_UNUSED_ARG(sv);
2480 Safefree(mg->mg_ptr);
2486 #endif /* USE_LOCALE_COLLATE */
2488 /* Just clear the UTF-8 cache data. */
2490 Perl_magic_setutf8(pTHX_ SV *sv, MAGIC *mg)
2492 PERL_ARGS_ASSERT_MAGIC_SETUTF8;
2493 PERL_UNUSED_CONTEXT;
2494 PERL_UNUSED_ARG(sv);
2495 Safefree(mg->mg_ptr); /* The mg_ptr holds the pos cache. */
2497 mg->mg_len = -1; /* The mg_len holds the len cache. */
2502 Perl_magic_set(pTHX_ SV *sv, MAGIC *mg)
2512 PERL_ARGS_ASSERT_MAGIC_SET;
2516 if (PL_curpm && (rx = PM_GETRE(PL_curpm))) {
2518 CALLREG_NUMBUF_STORE((REGEXP * const)rx,paren,sv);
2520 /* Croak with a READONLY error when a numbered match var is
2521 * set without a previous pattern match. Unless it's C<local $1>
2524 if (!PL_localizing) {
2525 Perl_croak_no_modify();
2531 switch (*mg->mg_ptr) {
2532 case '\001': /* ^A */
2533 if (SvOK(sv)) sv_copypv(PL_bodytarget, sv);
2534 else SvOK_off(PL_bodytarget);
2535 FmLINES(PL_bodytarget) = 0;
2536 if (SvPOK(PL_bodytarget)) {
2537 char *s = SvPVX(PL_bodytarget);
2538 while ( ((s = strchr(s, '\n'))) ) {
2539 FmLINES(PL_bodytarget)++;
2543 /* mg_set() has temporarily made sv non-magical */
2545 if ((tmg = mg_find(sv,PERL_MAGIC_taint)) && tmg->mg_len & 1)
2546 SvTAINTED_on(PL_bodytarget);
2548 SvTAINTED_off(PL_bodytarget);
2551 case '\003': /* ^C */
2552 PL_minus_c = cBOOL(SvIV(sv));
2555 case '\004': /* ^D */
2557 s = SvPV_nolen_const(sv);
2558 PL_debug = get_debug_opts(&s, 0) | DEBUG_TOP_FLAG;
2559 if (DEBUG_x_TEST || DEBUG_B_TEST)
2560 dump_all_perl(!DEBUG_B_TEST);
2562 PL_debug = (SvIV(sv)) | DEBUG_TOP_FLAG;
2565 case '\005': /* ^E */
2566 if (*(mg->mg_ptr+1) == '\0') {
2568 set_vaxc_errno(SvIV(sv));
2571 SetLastError( SvIV(sv) );
2574 os2_setsyserrno(SvIV(sv));
2576 /* will anyone ever use this? */
2577 SETERRNO(SvIV(sv), 4);
2582 else if (strEQ(mg->mg_ptr+1, "NCODING")) {
2583 SvREFCNT_dec(PL_encoding);
2584 if (SvOK(sv) || SvGMAGICAL(sv)) {
2585 PL_encoding = newSVsv(sv);
2592 case '\006': /* ^F */
2593 PL_maxsysfd = SvIV(sv);
2595 case '\010': /* ^H */
2596 PL_hints = SvIV(sv);
2598 case '\011': /* ^I */ /* NOT \t in EBCDIC */
2599 Safefree(PL_inplace);
2600 PL_inplace = SvOK(sv) ? savesvpv(sv) : NULL;
2602 case '\016': /* ^N */
2603 if (PL_curpm && (rx = PM_GETRE(PL_curpm))
2604 && (paren = RX_LASTCLOSEPAREN(rx))) goto setparen_got_rx;
2606 case '\017': /* ^O */
2607 if (*(mg->mg_ptr+1) == '\0') {
2608 Safefree(PL_osname);
2611 TAINT_PROPER("assigning to $^O");
2612 PL_osname = savesvpv(sv);
2615 else if (strEQ(mg->mg_ptr, "\017PEN")) {
2617 const char *const start = SvPV(sv, len);
2618 const char *out = (const char*)memchr(start, '\0', len);
2622 PL_compiling.cop_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2623 PL_hints |= HINT_LEXICAL_IO_IN | HINT_LEXICAL_IO_OUT;
2625 /* Opening for input is more common than opening for output, so
2626 ensure that hints for input are sooner on linked list. */
2627 tmp = out ? newSVpvn_flags(out + 1, start + len - out - 1,
2629 : newSVpvs_flags("", SvUTF8(sv));
2630 (void)hv_stores(GvHV(PL_hintgv), "open>", tmp);
2633 tmp = newSVpvn_flags(start, out ? (STRLEN)(out - start) : len,
2635 (void)hv_stores(GvHV(PL_hintgv), "open<", tmp);
2639 case '\020': /* ^P */
2640 PL_perldb = SvIV(sv);
2641 if (PL_perldb && !PL_DBsingle)
2644 case '\024': /* ^T */
2646 PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
2648 PL_basetime = (Time_t)SvIV(sv);
2651 case '\025': /* ^UTF8CACHE */
2652 if (strEQ(mg->mg_ptr+1, "TF8CACHE")) {
2653 PL_utf8cache = (signed char) sv_2iv(sv);
2656 case '\027': /* ^W & $^WARNING_BITS */
2657 if (*(mg->mg_ptr+1) == '\0') {
2658 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2660 PL_dowarn = (PL_dowarn & ~G_WARN_ON)
2661 | (i ? G_WARN_ON : G_WARN_OFF) ;
2664 else if (strEQ(mg->mg_ptr+1, "ARNING_BITS")) {
2665 if ( ! (PL_dowarn & G_WARN_ALL_MASK)) {
2667 PL_compiling.cop_warnings = pWARN_STD;
2672 int accumulate = 0 ;
2673 int any_fatals = 0 ;
2674 const char * const ptr = SvPV_const(sv, len) ;
2675 for (i = 0 ; i < len ; ++i) {
2676 accumulate |= ptr[i] ;
2677 any_fatals |= (ptr[i] & 0xAA) ;
2680 if (!specialWARN(PL_compiling.cop_warnings))
2681 PerlMemShared_free(PL_compiling.cop_warnings);
2682 PL_compiling.cop_warnings = pWARN_NONE;
2684 /* Yuck. I can't see how to abstract this: */
2686 ((STRLEN *)SvPV_nolen_const(sv)) - 1,
2690 if (!specialWARN(PL_compiling.cop_warnings))
2691 PerlMemShared_free(PL_compiling.cop_warnings);
2692 PL_compiling.cop_warnings = pWARN_ALL;
2693 PL_dowarn |= G_WARN_ONCE ;
2697 const char *const p = SvPV_const(sv, len);
2699 PL_compiling.cop_warnings
2700 = Perl_new_warnings_bitfield(aTHX_ PL_compiling.cop_warnings,
2703 if (isWARN_on(PL_compiling.cop_warnings, WARN_ONCE))
2704 PL_dowarn |= G_WARN_ONCE ;
2712 if (PL_localizing) {
2713 if (PL_localizing == 1)
2714 SAVESPTR(PL_last_in_gv);
2716 else if (SvOK(sv) && GvIO(PL_last_in_gv))
2717 IoLINES(GvIOp(PL_last_in_gv)) = SvIV(sv);
2720 Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
2721 s = IoTOP_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2722 IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2725 Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
2726 s = IoFMT_NAME(GvIOp(PL_defoutgv)) = savesvpv(sv);
2727 IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchsv(sv, GV_ADD, SVt_PVIO);
2730 IoPAGE_LEN(GvIOp(PL_defoutgv)) = (SvIV(sv));
2733 IoLINES_LEFT(GvIOp(PL_defoutgv)) = (SvIV(sv));
2734 if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
2735 IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
2738 IoPAGE(GvIOp(PL_defoutgv)) = (SvIV(sv));
2742 IO * const io = GvIO(PL_defoutgv);
2745 if ((SvIV(sv)) == 0)
2746 IoFLAGS(io) &= ~IOf_FLUSH;
2748 if (!(IoFLAGS(io) & IOf_FLUSH)) {
2749 PerlIO *ofp = IoOFP(io);
2751 (void)PerlIO_flush(ofp);
2752 IoFLAGS(io) |= IOf_FLUSH;
2761 SV *referent= SvRV(sv);
2762 const char *reftype= sv_reftype(referent, 0);
2763 /* XXX: dodgy type check: This leaves me feeling dirty, but the alternative
2764 * is to copy pretty much the entire sv_reftype() into this routine, or to do
2765 * a full string comparison on the return of sv_reftype() both of which
2766 * make me feel worse! NOTE, do not modify this comment without reviewing the
2767 * corresponding comment in sv_reftype(). - Yves */
2768 if (reftype[0] == 'S' || reftype[0] == 'L') {
2769 IV val= SvIV(referent);
2771 tmpsv= &PL_sv_undef;
2772 Perl_ck_warner(aTHX_ packWARN(WARN_DEPRECATED),
2773 "Setting $/ to a reference to %s as a form of slurp is deprecated, treating as undef",
2774 SvIV(SvRV(sv)) < 0 ? "a negative integer" : "zero"
2778 /* diag_listed_as: Setting $/ to %s reference is forbidden */
2779 Perl_croak(aTHX_ "Setting $/ to a%s %s reference is forbidden",
2780 *reftype == 'A' ? "n" : "", reftype);
2783 SvREFCNT_dec(PL_rs);
2784 PL_rs = newSVsv(tmpsv);
2788 SvREFCNT_dec(PL_ors_sv);
2790 PL_ors_sv = newSVsv(sv);
2798 Perl_croak(aTHX_ "Assigning non-zero to $[ is no longer possible");
2801 #ifdef COMPLEX_STATUS
2802 if (PL_localizing == 2) {
2803 SvUPGRADE(sv, SVt_PVLV);
2804 PL_statusvalue = LvTARGOFF(sv);
2805 PL_statusvalue_vms = LvTARGLEN(sv);
2809 #ifdef VMSISH_STATUS
2811 STATUS_NATIVE_CHILD_SET((U32)SvIV(sv));
2814 STATUS_UNIX_EXIT_SET(SvIV(sv));
2819 # define PERL_VMS_BANG vaxc$errno
2821 # define PERL_VMS_BANG 0
2823 #if defined(WIN32) && ! defined(UNDER_CE)
2824 SETERRNO(win32_get_errno(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0),
2825 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2827 SETERRNO(SvIOK(sv) ? SvIVX(sv) : SvOK(sv) ? sv_2iv(sv) : 0,
2828 (SvIV(sv) == EVMSERR) ? 4 : PERL_VMS_BANG);
2835 const Uid_t new_uid = SvUID(sv);
2836 PL_delaymagic_uid = new_uid;
2837 if (PL_delaymagic) {
2838 PL_delaymagic |= DM_RUID;
2839 break; /* don't do magic till later */
2842 rc = setruid(new_uid);
2845 rc = setreuid(new_uid, (Uid_t)-1);
2847 #ifdef HAS_SETRESUID
2848 rc = setresuid(new_uid, (Uid_t)-1, (Uid_t)-1);
2850 if (new_uid == PerlProc_geteuid()) { /* special case $< = $> */
2852 /* workaround for Darwin's setuid peculiarity, cf [perl #24122] */
2853 if (new_uid != 0 && PerlProc_getuid() == 0)
2854 rc = PerlProc_setuid(0);
2856 rc = PerlProc_setuid(new_uid);
2858 Perl_croak(aTHX_ "setruid() not implemented");
2863 /* XXX $< currently silently ignores failures */
2864 PERL_UNUSED_VAR(rc);
2870 const Uid_t new_euid = SvUID(sv);
2871 PL_delaymagic_euid = new_euid;
2872 if (PL_delaymagic) {
2873 PL_delaymagic |= DM_EUID;
2874 break; /* don't do magic till later */
2877 rc = seteuid(new_euid);
2880 rc = setreuid((Uid_t)-1, new_euid);
2882 #ifdef HAS_SETRESUID
2883 rc = setresuid((Uid_t)-1, new_euid, (Uid_t)-1);
2885 if (new_euid == PerlProc_getuid()) /* special case $> = $< */
2886 rc = PerlProc_setuid(new_euid);
2888 Perl_croak(aTHX_ "seteuid() not implemented");
2893 /* XXX $> currently silently ignores failures */
2894 PERL_UNUSED_VAR(rc);
2900 const Gid_t new_gid = SvGID(sv);
2901 PL_delaymagic_gid = new_gid;
2902 if (PL_delaymagic) {
2903 PL_delaymagic |= DM_RGID;
2904 break; /* don't do magic till later */
2907 rc = setrgid(new_gid);
2910 rc = setregid(new_gid, (Gid_t)-1);
2912 #ifdef HAS_SETRESGID
2913 rc = setresgid(new_gid, (Gid_t)-1, (Gid_t) -1);
2915 if (new_gid == PerlProc_getegid()) /* special case $( = $) */
2916 rc = PerlProc_setgid(new_gid);
2918 Perl_croak(aTHX_ "setrgid() not implemented");
2923 /* XXX $( currently silently ignores failures */
2924 PERL_UNUSED_VAR(rc);
2931 #ifdef HAS_SETGROUPS
2933 const char *p = SvPV_const(sv, len);
2934 Groups_t *gary = NULL;
2935 #ifdef _SC_NGROUPS_MAX
2936 int maxgrp = sysconf(_SC_NGROUPS_MAX);
2941 int maxgrp = NGROUPS;
2946 new_egid = (Gid_t)Atol(p);
2947 for (i = 0; i < maxgrp; ++i) {
2948 while (*p && !isSPACE(*p))
2955 Newx(gary, i + 1, Groups_t);
2957 Renew(gary, i + 1, Groups_t);
2958 gary[i] = (Groups_t)Atol(p);
2961 rc = setgroups(i, gary);
2964 #else /* HAS_SETGROUPS */
2965 new_egid = SvGID(sv);
2966 #endif /* HAS_SETGROUPS */
2967 PL_delaymagic_egid = new_egid;
2968 if (PL_delaymagic) {
2969 PL_delaymagic |= DM_EGID;
2970 break; /* don't do magic till later */
2973 rc = setegid(new_egid);
2976 rc = setregid((Gid_t)-1, new_egid);
2978 #ifdef HAS_SETRESGID
2979 rc = setresgid((Gid_t)-1, new_egid, (Gid_t)-1);
2981 if (new_egid == PerlProc_getgid()) /* special case $) = $( */
2982 rc = PerlProc_setgid(new_egid);
2984 Perl_croak(aTHX_ "setegid() not implemented");
2989 /* XXX $) currently silently ignores failures */
2990 PERL_UNUSED_VAR(rc);
2994 PL_chopset = SvPV_force(sv,len);
2997 /* Store the pid in mg->mg_obj so we can tell when a fork has
2998 occurred. mg->mg_obj points to *$ by default, so clear it. */
2999 if (isGV(mg->mg_obj)) {
3000 if (mg->mg_flags & MGf_REFCOUNTED) /* probably never true */
3001 SvREFCNT_dec(mg->mg_obj);
3002 mg->mg_flags |= MGf_REFCOUNTED;
3003 mg->mg_obj = newSViv((IV)PerlProc_getpid());
3005 else sv_setiv(mg->mg_obj, (IV)PerlProc_getpid());
3008 LOCK_DOLLARZERO_MUTEX;
3009 #ifdef HAS_SETPROCTITLE
3010 /* The BSDs don't show the argv[] in ps(1) output, they
3011 * show a string from the process struct and provide
3012 * the setproctitle() routine to manipulate that. */
3013 if (PL_origalen != 1) {
3014 s = SvPV_const(sv, len);
3015 # if __FreeBSD_version > 410001
3016 /* The leading "-" removes the "perl: " prefix,
3017 * but not the "(perl) suffix from the ps(1)
3018 * output, because that's what ps(1) shows if the
3019 * argv[] is modified. */
3020 setproctitle("-%s", s);
3021 # else /* old FreeBSDs, NetBSD, OpenBSD, anyBSD */
3022 /* This doesn't really work if you assume that
3023 * $0 = 'foobar'; will wipe out 'perl' from the $0
3024 * because in ps(1) output the result will be like
3025 * sprintf("perl: %s (perl)", s)
3026 * I guess this is a security feature:
3027 * one (a user process) cannot get rid of the original name.
3029 setproctitle("%s", s);
3032 #elif defined(__hpux) && defined(PSTAT_SETCMD)
3033 if (PL_origalen != 1) {
3035 s = SvPV_const(sv, len);
3036 un.pst_command = (char *)s;
3037 pstat(PSTAT_SETCMD, un, len, 0, 0);
3040 if (PL_origalen > 1) {
3041 /* PL_origalen is set in perl_parse(). */
3042 s = SvPV_force(sv,len);
3043 if (len >= (STRLEN)PL_origalen-1) {
3044 /* Longer than original, will be truncated. We assume that
3045 * PL_origalen bytes are available. */
3046 Copy(s, PL_origargv[0], PL_origalen-1, char);
3049 /* Shorter than original, will be padded. */
3051 /* Special case for Mac OS X: see [perl #38868] */
3054 /* Is the space counterintuitive? Yes.
3055 * (You were expecting \0?)
3056 * Does it work? Seems to. (In Linux 2.4.20 at least.)
3058 const int pad = ' ';
3060 Copy(s, PL_origargv[0], len, char);
3061 PL_origargv[0][len] = 0;
3062 memset(PL_origargv[0] + len + 1,
3063 pad, PL_origalen - len - 1);
3065 PL_origargv[0][PL_origalen-1] = 0;
3066 for (i = 1; i < PL_origargc; i++)
3068 #ifdef HAS_PRCTL_SET_NAME
3069 /* Set the legacy process name in addition to the POSIX name on Linux */
3070 if (prctl(PR_SET_NAME, (unsigned long)s, 0, 0, 0) != 0) {
3071 /* diag_listed_as: SKIPME */
3072 Perl_croak(aTHX_ "Can't set $0 with prctl(): %s", Strerror(errno));
3077 UNLOCK_DOLLARZERO_MUTEX;
3084 Perl_whichsig_sv(pTHX_ SV *sigsv)
3088 PERL_ARGS_ASSERT_WHICHSIG_SV;
3089 PERL_UNUSED_CONTEXT;
3090 sigpv = SvPV_const(sigsv, siglen);
3091 return whichsig_pvn(sigpv, siglen);
3095 Perl_whichsig_pv(pTHX_ const char *sig)
3097 PERL_ARGS_ASSERT_WHICHSIG_PV;
3098 PERL_UNUSED_CONTEXT;
3099 return whichsig_pvn(sig, strlen(sig));
3103 Perl_whichsig_pvn(pTHX_ const char *sig, STRLEN len)
3107 PERL_ARGS_ASSERT_WHICHSIG_PVN;
3108 PERL_UNUSED_CONTEXT;
3110 for (sigv = (char* const*)PL_sig_name; *sigv; sigv++)
3111 if (strlen(*sigv) == len && memEQ(sig,*sigv, len))
3112 return PL_sig_num[sigv - (char* const*)PL_sig_name];
3114 if (memEQs(sig, len, "CHLD"))
3118 if (memEQs(sig, len, "CLD"))
3125 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3126 Perl_sighandler(int sig, siginfo_t *sip, void *uap)
3128 Perl_sighandler(int sig)
3131 #ifdef PERL_GET_SIG_CONTEXT
3132 dTHXa(PERL_GET_SIG_CONTEXT);
3139 SV * const tSv = PL_Sv;
3143 XPV * const tXpv = PL_Xpv;
3144 I32 old_ss_ix = PL_savestack_ix;
3145 SV *errsv_save = NULL;
3148 if (!PL_psig_ptr[sig]) {
3149 PerlIO_printf(Perl_error_log, "Signal SIG%s received, but no signal handler set.\n",
3154 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3155 /* Max number of items pushed there is 3*n or 4. We cannot fix
3156 infinity, so we fix 4 (in fact 5): */
3157 if (PL_savestack_ix + 15 <= PL_savestack_max) {
3159 PL_savestack_ix += 5; /* Protect save in progress. */
3160 SAVEDESTRUCTOR_X(S_unwind_handler_stack, NULL);
3163 /* sv_2cv is too complicated, try a simpler variant first: */
3164 if (!SvROK(PL_psig_ptr[sig]) || !(cv = MUTABLE_CV(SvRV(PL_psig_ptr[sig])))
3165 || SvTYPE(cv) != SVt_PVCV) {
3167 cv = sv_2cv(PL_psig_ptr[sig], &st, &gv, GV_ADD);
3170 if (!cv || !CvROOT(cv)) {
3171 Perl_ck_warner(aTHX_ packWARN(WARN_SIGNAL), "SIG%s handler \"%s\" not defined.\n",
3172 PL_sig_name[sig], (gv ? GvENAME(gv)
3179 sv = PL_psig_name[sig]
3180 ? SvREFCNT_inc_NN(PL_psig_name[sig])
3181 : newSVpv(PL_sig_name[sig],0);
3185 if (PL_signals & PERL_SIGNALS_UNSAFE_FLAG) {
3186 /* make sure our assumption about the size of the SAVEs are correct:
3187 * 3 for SAVEDESTRUCTOR_X, 2 for SAVEFREESV */
3188 assert(old_ss_ix + 2 + ((flags & 1) ? 3+5 : 0) == PL_savestack_ix);
3191 PUSHSTACKi(PERLSI_SIGNAL);
3194 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3196 struct sigaction oact;
3198 if (sigaction(sig, 0, &oact) == 0 && oact.sa_flags & SA_SIGINFO) {
3201 SV *rv = newRV_noinc(MUTABLE_SV(sih));
3202 /* The siginfo fields signo, code, errno, pid, uid,
3203 * addr, status, and band are defined by POSIX/SUSv3. */
3204 (void)hv_stores(sih, "signo", newSViv(sip->si_signo));
3205 (void)hv_stores(sih, "code", newSViv(sip->si_code));
3206 #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. */
3207 hv_stores(sih, "errno", newSViv(sip->si_errno));
3208 hv_stores(sih, "status", newSViv(sip->si_status));
3209 hv_stores(sih, "uid", newSViv(sip->si_uid));
3210 hv_stores(sih, "pid", newSViv(sip->si_pid));
3211 hv_stores(sih, "addr", newSVuv(PTR2UV(sip->si_addr)));
3212 hv_stores(sih, "band", newSViv(sip->si_band));
3216 mPUSHp((char *)sip, sizeof(*sip));
3224 errsv_save = newSVsv(ERRSV);
3226 call_sv(MUTABLE_SV(cv), G_DISCARD|G_EVAL);
3230 SV * const errsv = ERRSV;
3231 if (SvTRUE_NN(errsv)) {
3232 SvREFCNT_dec(errsv_save);
3234 /* Handler "died", for example to get out of a restart-able read().
3235 * Before we re-do that on its behalf re-enable the signal which was
3236 * blocked by the system when we entered.
3238 #ifdef HAS_SIGPROCMASK
3239 #if defined(HAS_SIGACTION) && defined(SA_SIGINFO)
3245 sigaddset(&set,sig);
3246 sigprocmask(SIG_UNBLOCK, &set, NULL);
3249 /* Not clear if this will work */
3250 (void)rsignal(sig, SIG_IGN);
3251 (void)rsignal(sig, PL_csighandlerp);
3253 #endif /* !PERL_MICRO */
3257 sv_setsv(errsv, errsv_save);
3258 SvREFCNT_dec(errsv_save);
3263 /* pop any of SAVEFREESV, SAVEDESTRUCTOR_X and "save in progress" */
3264 PL_savestack_ix = old_ss_ix;
3266 SvREFCNT_dec_NN(sv);
3267 PL_op = myop; /* Apparently not needed... */
3269 PL_Sv = tSv; /* Restore global temporaries. */
3276 S_restore_magic(pTHX_ const void *p)
3279 MGS* const mgs = SSPTR(PTR2IV(p), MGS*);
3280 SV* const sv = mgs->mgs_sv;
3286 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv)) {
3287 SvTEMP_off(sv); /* if it's still magical, this value isn't temporary */
3288 #ifdef PERL_OLD_COPY_ON_WRITE
3289 /* While magic was saved (and off) sv_setsv may well have seen
3290 this SV as a prime candidate for COW. */
3292 sv_force_normal_flags(sv, 0);
3294 if (mgs->mgs_readonly)
3296 if (mgs->mgs_magical)
3297 SvFLAGS(sv) |= mgs->mgs_magical;
3302 bumped = mgs->mgs_bumped;
3303 mgs->mgs_sv = NULL; /* mark the MGS structure as restored */
3305 /* If we're still on top of the stack, pop us off. (That condition
3306 * will be satisfied if restore_magic was called explicitly, but *not*
3307 * if it's being called via leave_scope.)
3308 * The reason for doing this is that otherwise, things like sv_2cv()
3309 * may leave alloc gunk on the savestack, and some code
3310 * (e.g. sighandler) doesn't expect that...
3312 if (PL_savestack_ix == mgs->mgs_ss_ix)
3314 UV popval = SSPOPUV;
3315 assert(popval == SAVEt_DESTRUCTOR_X);
3316 PL_savestack_ix -= 2;
3318 assert((popval & SAVE_MASK) == SAVEt_ALLOC);
3319 PL_savestack_ix -= popval >> SAVE_TIGHT_SHIFT;
3322 if (SvREFCNT(sv) == 1) {
3323 /* We hold the last reference to this SV, which implies that the
3324 SV was deleted as a side effect of the routines we called.
3325 So artificially keep it alive a bit longer.
3326 We avoid turning on the TEMP flag, which can cause the SV's
3327 buffer to get stolen (and maybe other stuff). */
3332 SvREFCNT_dec_NN(sv); /* undo the inc in S_save_magic() */
3336 /* clean up the mess created by Perl_sighandler().
3337 * Note that this is only called during an exit in a signal handler;
3338 * a die is trapped by the call_sv() and the SAVEDESTRUCTOR_X manually
3342 S_unwind_handler_stack(pTHX_ const void *p)
3347 PL_savestack_ix -= 5; /* Unprotect save in progress. */
3351 =for apidoc magic_sethint
3353 Triggered by a store to %^H, records the key/value pair to
3354 C<PL_compiling.cop_hints_hash>. It is assumed that hints aren't storing
3355 anything that would need a deep copy. Maybe we should warn if we find a
3361 Perl_magic_sethint(pTHX_ SV *sv, MAGIC *mg)
3364 SV *key = (mg->mg_len == HEf_SVKEY) ? MUTABLE_SV(mg->mg_ptr)
3365 : newSVpvn_flags(mg->mg_ptr, mg->mg_len, SVs_TEMP);
3367 PERL_ARGS_ASSERT_MAGIC_SETHINT;
3369 /* mg->mg_obj isn't being used. If needed, it would be possible to store
3370 an alternative leaf in there, with PL_compiling.cop_hints being used if
3371 it's NULL. If needed for threads, the alternative could lock a mutex,
3372 or take other more complex action. */
3374 /* Something changed in %^H, so it will need to be restored on scope exit.
3375 Doing this here saves a lot of doing it manually in perl code (and
3376 forgetting to do it, and consequent subtle errors. */
3377 PL_hints |= HINT_LOCALIZE_HH;
3378 CopHINTHASH_set(&PL_compiling,
3379 cophh_store_sv(CopHINTHASH_get(&PL_compiling), key, 0, sv, 0));
3384 =for apidoc magic_clearhint
3386 Triggered by a delete from %^H, records the key to
3387 C<PL_compiling.cop_hints_hash>.
3392 Perl_magic_clearhint(pTHX_ SV *sv, MAGIC *mg)
3396 PERL_ARGS_ASSERT_MAGIC_CLEARHINT;
3397 PERL_UNUSED_ARG(sv);
3399 PL_hints |= HINT_LOCALIZE_HH;
3400 CopHINTHASH_set(&PL_compiling,
3401 mg->mg_len == HEf_SVKEY
3402 ? cophh_delete_sv(CopHINTHASH_get(&PL_compiling),
3403 MUTABLE_SV(mg->mg_ptr), 0, 0)
3404 : cophh_delete_pvn(CopHINTHASH_get(&PL_compiling),
3405 mg->mg_ptr, mg->mg_len, 0, 0));
3410 =for apidoc magic_clearhints
3412 Triggered by clearing %^H, resets C<PL_compiling.cop_hints_hash>.
3417 Perl_magic_clearhints(pTHX_ SV *sv, MAGIC *mg)
3419 PERL_ARGS_ASSERT_MAGIC_CLEARHINTS;
3420 PERL_UNUSED_ARG(sv);
3421 PERL_UNUSED_ARG(mg);
3422 cophh_free(CopHINTHASH_get(&PL_compiling));
3423 CopHINTHASH_set(&PL_compiling, cophh_new_empty());
3428 Perl_magic_copycallchecker(pTHX_ SV *sv, MAGIC *mg, SV *nsv,
3429 const char *name, I32 namlen)
3433 PERL_ARGS_ASSERT_MAGIC_COPYCALLCHECKER;
3434 PERL_UNUSED_ARG(sv);
3435 PERL_UNUSED_ARG(name);
3436 PERL_UNUSED_ARG(namlen);
3438 sv_magic(nsv, &PL_sv_undef, mg->mg_type, NULL, 0);
3439 nmg = mg_find(nsv, mg->mg_type);
3440 if (nmg->mg_flags & MGf_REFCOUNTED) SvREFCNT_dec(nmg->mg_obj);
3441 nmg->mg_ptr = mg->mg_ptr;
3442 nmg->mg_obj = SvREFCNT_inc_simple(mg->mg_obj);
3443 nmg->mg_flags |= MGf_REFCOUNTED;
3449 * c-indentation-style: bsd
3451 * indent-tabs-mode: nil
3454 * ex: set ts=8 sts=4 sw=4 et: