3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 2005, 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 * "For the fashion of Minas Tirith was such that it was built on seven
16 /* This file contains functions to manipulate several of Perl's stacks;
17 * in particular it contains code to push various types of things onto
18 * the savestack, then to pop them off and perform the correct restorative
19 * action for each one. This corresponds to the cleanup Perl does at
24 #define PERL_IN_SCOPE_C
28 Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
31 #ifndef STRESS_REALLOC
32 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
34 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
39 #ifndef STRESS_REALLOC
40 #define GROW(old) ((old) * 3 / 2)
42 #define GROW(old) ((old) + 1)
46 Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
49 New(56, si, 1, PERL_SI);
50 si->si_stack = newAV();
51 AvREAL_off(si->si_stack);
52 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
53 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
54 AvFILLp(si->si_stack) = 0;
57 si->si_cxmax = cxitems - 1;
59 si->si_type = PERLSI_UNDEF;
60 New(56, si->si_cxstack, cxitems, PERL_CONTEXT);
61 /* Without any kind of initialising PUSHSUBST()
62 * in pp_subst() will read uninitialised heap. */
63 Poison(si->si_cxstack, cxitems, PERL_CONTEXT);
70 const IV old_max = cxstack_max;
71 cxstack_max = GROW(cxstack_max);
72 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
73 /* Without any kind of initialising deep enough recursion
74 * will end up reading uninitialised PERL_CONTEXTs. */
75 Poison(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
76 return cxstack_ix + 1;
82 if (PL_scopestack_ix == PL_scopestack_max) {
83 PL_scopestack_max = GROW(PL_scopestack_max);
84 Renew(PL_scopestack, PL_scopestack_max, I32);
86 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
93 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
98 Perl_markstack_grow(pTHX)
100 const I32 oldmax = PL_markstack_max - PL_markstack;
101 const I32 newmax = GROW(oldmax);
103 Renew(PL_markstack, newmax, I32);
104 PL_markstack_ptr = PL_markstack + oldmax;
105 PL_markstack_max = PL_markstack + newmax;
109 Perl_savestack_grow(pTHX)
111 PL_savestack_max = GROW(PL_savestack_max) + 4;
112 Renew(PL_savestack, PL_savestack_max, ANY);
116 Perl_savestack_grow_cnt(pTHX_ I32 need)
118 PL_savestack_max = PL_savestack_ix + need;
119 Renew(PL_savestack, PL_savestack_max, ANY);
125 Perl_tmps_grow(pTHX_ I32 n)
127 #ifndef STRESS_REALLOC
129 n = (PL_tmps_max < 512) ? 128 : 512;
131 PL_tmps_max = PL_tmps_ix + n + 1;
132 Renew(PL_tmps_stack, PL_tmps_max, SV*);
139 /* XXX should tmps_floor live in cxstack? */
140 const I32 myfloor = PL_tmps_floor;
141 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
142 SV* const sv = PL_tmps_stack[PL_tmps_ix];
143 PL_tmps_stack[PL_tmps_ix--] = Nullsv;
144 if (sv && sv != &PL_sv_undef) {
146 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
152 S_save_scalar_at(pTHX_ SV **sptr)
154 SV * const osv = *sptr;
155 register SV * const sv = *sptr = NEWSV(0,0);
157 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
159 sv_upgrade(sv, SvTYPE(osv));
160 if (SvGMAGICAL(osv)) {
161 const bool oldtainted = PL_tainted;
162 mg_get(osv); /* note, can croak! */
163 if (PL_tainting && PL_tainted &&
164 (mg = mg_find(osv, PERL_MAGIC_taint))) {
165 SAVESPTR(mg->mg_obj);
168 SvFLAGS(osv) |= (SvFLAGS(osv) &
169 (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
170 PL_tainted = oldtainted;
172 SvMAGIC_set(sv, SvMAGIC(osv));
173 /* if it's a special scalar or if it has no 'set' magic,
174 * propagate the SvREADONLY flag. --rgs 20030922 */
175 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
176 if (mg->mg_type == '\0'
177 || !(mg->mg_virtual && mg->mg_virtual->svt_set))
179 SvFLAGS(sv) |= SvREADONLY(osv);
183 SvFLAGS(sv) |= SvMAGICAL(osv);
184 /* XXX SvMAGIC() is *shared* between osv and sv. This can
185 * lead to coredumps when both SVs are destroyed without one
186 * of their SvMAGIC() slots being NULLed. */
195 Perl_save_scalar(pTHX_ GV *gv)
197 SV **sptr = &GvSV(gv);
199 SSPUSHPTR(SvREFCNT_inc(gv));
200 SSPUSHPTR(SvREFCNT_inc(*sptr));
202 return save_scalar_at(sptr);
206 Perl_save_svref(pTHX_ SV **sptr)
210 SSPUSHPTR(SvREFCNT_inc(*sptr));
211 SSPUSHINT(SAVEt_SVREF);
212 return save_scalar_at(sptr);
215 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
216 * restore a global SV to its prior contents, freeing new value. */
218 Perl_save_generic_svref(pTHX_ SV **sptr)
222 SSPUSHPTR(SvREFCNT_inc(*sptr));
223 SSPUSHINT(SAVEt_GENERIC_SVREF);
226 /* Like save_pptr(), but also Safefree()s the new value if it is different
227 * from the old one. Can be used to restore a global char* to its prior
228 * contents, freeing new value. */
230 Perl_save_generic_pvref(pTHX_ char **str)
235 SSPUSHINT(SAVEt_GENERIC_PVREF);
238 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
239 * Can be used to restore a shared global char* to its prior
240 * contents, freeing new value. */
242 Perl_save_shared_pvref(pTHX_ char **str)
247 SSPUSHINT(SAVEt_SHARED_PVREF);
250 /* set the SvFLAGS specified by mask to the values in val */
253 Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
259 SSPUSHINT(SAVEt_SET_SVFLAGS);
263 Perl_save_gp(pTHX_ GV *gv, I32 empty)
266 SSPUSHIV((IV)SvLEN(gv));
267 SvLEN_set(gv, 0); /* forget that anything was allocated here */
268 SSPUSHIV((IV)SvCUR(gv));
269 SSPUSHPTR(SvPVX_const(gv));
271 SSPUSHPTR(SvREFCNT_inc(gv));
278 Newz(602, gp, 1, GP);
281 PL_sub_generation++; /* taking a method out of circulation */
282 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
284 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
286 GvGP(gv) = gp_ref(gp);
287 GvSV(gv) = NEWSV(72,0);
288 GvLINE(gv) = CopLINE(PL_curcop);
289 /* XXX Ideally this cast would be replaced with a change to const char*
291 GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) "";
301 Perl_save_ary(pTHX_ GV *gv)
303 AV * const oav = GvAVn(gv);
306 if (!AvREAL(oav) && AvREIFY(oav))
313 GvAV(gv) = Null(AV*);
316 SvMAGIC_set(av, SvMAGIC(oav));
317 SvFLAGS((SV*)av) |= SvMAGICAL(oav);
319 SvMAGIC_set(oav, NULL);
328 Perl_save_hash(pTHX_ GV *gv)
334 SSPUSHPTR(ohv = GvHVn(gv));
337 GvHV(gv) = Null(HV*);
340 SvMAGIC_set(hv, SvMAGIC(ohv));
341 SvFLAGS((SV*)hv) |= SvMAGICAL(ohv);
343 SvMAGIC_set(ohv, NULL);
352 Perl_save_item(pTHX_ register SV *item)
354 register SV * const sv = newSVsv(item);
357 SSPUSHPTR(item); /* remember the pointer */
358 SSPUSHPTR(sv); /* remember the value */
359 SSPUSHINT(SAVEt_ITEM);
363 Perl_save_int(pTHX_ int *intp)
368 SSPUSHINT(SAVEt_INT);
372 Perl_save_long(pTHX_ long int *longp)
377 SSPUSHINT(SAVEt_LONG);
381 Perl_save_bool(pTHX_ bool *boolp)
386 SSPUSHINT(SAVEt_BOOL);
390 Perl_save_I32(pTHX_ I32 *intp)
395 SSPUSHINT(SAVEt_I32);
399 Perl_save_I16(pTHX_ I16 *intp)
404 SSPUSHINT(SAVEt_I16);
408 Perl_save_I8(pTHX_ I8 *bytep)
417 Perl_save_iv(pTHX_ IV *ivp)
425 /* Cannot use save_sptr() to store a char* since the SV** cast will
426 * force word-alignment and we'll miss the pointer.
429 Perl_save_pptr(pTHX_ char **pptr)
434 SSPUSHINT(SAVEt_PPTR);
438 Perl_save_vptr(pTHX_ void *ptr)
441 SSPUSHPTR(*(char**)ptr);
443 SSPUSHINT(SAVEt_VPTR);
447 Perl_save_sptr(pTHX_ SV **sptr)
452 SSPUSHINT(SAVEt_SPTR);
456 Perl_save_padsv(pTHX_ PADOFFSET off)
459 ASSERT_CURPAD_ACTIVE("save_padsv");
460 SSPUSHPTR(PL_curpad[off]);
461 SSPUSHPTR(PL_comppad);
462 SSPUSHLONG((long)off);
463 SSPUSHINT(SAVEt_PADSV);
467 Perl_save_threadsv(pTHX_ PADOFFSET i)
469 Perl_croak(aTHX_ "panic: save_threadsv called in non-threaded perl");
471 NORETURN_FUNCTION_END;
475 Perl_save_nogv(pTHX_ GV *gv)
479 SSPUSHINT(SAVEt_NSTAB);
483 Perl_save_hptr(pTHX_ HV **hptr)
488 SSPUSHINT(SAVEt_HPTR);
492 Perl_save_aptr(pTHX_ AV **aptr)
497 SSPUSHINT(SAVEt_APTR);
501 Perl_save_freesv(pTHX_ SV *sv)
505 SSPUSHINT(SAVEt_FREESV);
509 Perl_save_mortalizesv(pTHX_ SV *sv)
513 SSPUSHINT(SAVEt_MORTALIZESV);
517 Perl_save_freeop(pTHX_ OP *o)
521 SSPUSHINT(SAVEt_FREEOP);
525 Perl_save_freepv(pTHX_ char *pv)
529 SSPUSHINT(SAVEt_FREEPV);
533 Perl_save_clearsv(pTHX_ SV **svp)
535 ASSERT_CURPAD_ACTIVE("save_clearsv");
537 SSPUSHLONG((long)(svp-PL_curpad));
538 SSPUSHINT(SAVEt_CLEARSV);
539 SvPADSTALE_off(*svp); /* mark lexical as active */
543 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
548 SSPUSHPTR(SvREFCNT_inc(hv));
549 SSPUSHINT(SAVEt_DELETE);
553 Perl_save_list(pTHX_ register SV **sarg, I32 maxsarg)
557 for (i = 1; i <= maxsarg; i++) {
558 register SV * const sv = NEWSV(0,0);
559 sv_setsv(sv,sarg[i]);
561 SSPUSHPTR(sarg[i]); /* remember the pointer */
562 SSPUSHPTR(sv); /* remember the value */
563 SSPUSHINT(SAVEt_ITEM);
568 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
573 SSPUSHINT(SAVEt_DESTRUCTOR);
577 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
582 SSPUSHINT(SAVEt_DESTRUCTOR_X);
586 Perl_save_aelem(pTHX_ const AV *av, I32 idx, SV **sptr)
590 SSPUSHPTR(SvREFCNT_inc(av));
592 SSPUSHPTR(SvREFCNT_inc(*sptr));
593 SSPUSHINT(SAVEt_AELEM);
594 /* if it gets reified later, the restore will have the wrong refcnt */
595 if (!AvREAL(av) && AvREIFY(av))
596 (void)SvREFCNT_inc(*sptr);
597 save_scalar_at(sptr);
599 /* If we're localizing a tied array element, this new sv
600 * won't actually be stored in the array - so it won't get
601 * reaped when the localize ends. Ensure it gets reaped by
602 * mortifying it instead. DAPM */
603 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
608 Perl_save_helem(pTHX_ HV *hv, SV *key, SV **sptr)
612 SSPUSHPTR(SvREFCNT_inc(hv));
613 SSPUSHPTR(SvREFCNT_inc(key));
614 SSPUSHPTR(SvREFCNT_inc(*sptr));
615 SSPUSHINT(SAVEt_HELEM);
616 save_scalar_at(sptr);
618 /* If we're localizing a tied hash element, this new sv
619 * won't actually be stored in the hash - so it won't get
620 * reaped when the localize ends. Ensure it gets reaped by
621 * mortifying it instead. DAPM */
622 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
635 Perl_save_alloc(pTHX_ I32 size, I32 pad)
637 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
638 - (char*)PL_savestack);
639 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
641 /* SSCHECK may not be good enough */
642 while (PL_savestack_ix + elems + 2 > PL_savestack_max)
645 PL_savestack_ix += elems;
647 SSPUSHINT(SAVEt_ALLOC);
652 Perl_leave_scope(pTHX_ I32 base)
664 Perl_croak(aTHX_ "panic: corrupt saved stack index");
665 while (PL_savestack_ix > base) {
667 case SAVEt_ITEM: /* normal string */
668 value = (SV*)SSPOPPTR;
670 sv_replace(sv,value);
675 case SAVEt_SV: /* scalar reference */
676 value = (SV*)SSPOPPTR;
679 av = (AV*)gv; /* what to refcnt_dec */
681 case SAVEt_GENERIC_PVREF: /* generic pv */
682 str = (char*)SSPOPPTR;
684 if (*(char**)ptr != str) {
685 Safefree(*(char**)ptr);
689 case SAVEt_SHARED_PVREF: /* shared pv */
690 str = (char*)SSPOPPTR;
692 if (*(char**)ptr != str) {
694 PerlMem_free(*(char**)ptr);
696 PerlMemShared_free(*(char**)ptr);
701 case SAVEt_GENERIC_SVREF: /* generic sv */
702 value = (SV*)SSPOPPTR;
709 case SAVEt_SVREF: /* scalar reference */
710 value = (SV*)SSPOPPTR;
712 av = Nullav; /* what to refcnt_dec */
715 DEBUG_S(PerlIO_printf(Perl_debug_log,
716 "restore svref: %p %p:%s -> %p:%s\n",
717 ptr, sv, SvPEEK(sv), value, SvPEEK(value)));
718 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
719 SvTYPE(sv) != SVt_PVGV)
721 SvUPGRADE(value, SvTYPE(sv));
722 SvMAGIC_set(value, SvMAGIC(sv));
723 SvFLAGS(value) |= SvMAGICAL(sv);
727 /* XXX This branch is pretty bogus. This code irretrievably
728 * clears(!) the magic on the SV (either to avoid further
729 * croaking that might ensue when the SvSETMAGIC() below is
730 * called, or to avoid two different SVs pointing at the same
731 * SvMAGIC()). This needs a total rethink. --GSAR */
732 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
733 SvTYPE(value) != SVt_PVGV)
735 SvFLAGS(value) |= (SvFLAGS(value) &
736 (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
737 SvMAGICAL_off(value);
738 /* XXX this is a leak when we get here because the
739 * mg_get() in save_scalar_at() croaked */
740 SvMAGIC_set(value, NULL);
748 if (av) /* actually an av, hv or gv */
751 case SAVEt_AV: /* array reference */
755 AV * const goner = GvAV(gv);
756 /* FIXME - this is a temporary hack until we work out what
757 the correct behaviour for magic should be. */
758 sv_unmagic((SV*)goner, PERL_MAGIC_arylen_p);
759 SvMAGIC_set(av, SvMAGIC(goner));
760 SvFLAGS((SV*)av) |= SvMAGICAL(goner);
761 SvMAGICAL_off(goner);
762 SvMAGIC_set(goner, NULL);
772 case SAVEt_HV: /* hash reference */
776 HV * const goner = GvHV(gv);
777 SvMAGIC_set(hv, SvMAGIC(goner));
778 SvFLAGS(hv) |= SvMAGICAL(goner);
779 SvMAGICAL_off(goner);
780 SvMAGIC_set(goner, NULL);
790 case SAVEt_INT: /* int reference */
792 *(int*)ptr = (int)SSPOPINT;
794 case SAVEt_LONG: /* long reference */
796 *(long*)ptr = (long)SSPOPLONG;
798 case SAVEt_BOOL: /* bool reference */
800 *(bool*)ptr = (bool)SSPOPBOOL;
802 case SAVEt_I32: /* I32 reference */
804 *(I32*)ptr = (I32)SSPOPINT;
806 case SAVEt_I16: /* I16 reference */
808 *(I16*)ptr = (I16)SSPOPINT;
810 case SAVEt_I8: /* I8 reference */
812 *(I8*)ptr = (I8)SSPOPINT;
814 case SAVEt_IV: /* IV reference */
816 *(IV*)ptr = (IV)SSPOPIV;
818 case SAVEt_SPTR: /* SV* reference */
820 *(SV**)ptr = (SV*)SSPOPPTR;
822 case SAVEt_VPTR: /* random* reference */
823 case SAVEt_PPTR: /* char* reference */
825 *(char**)ptr = (char*)SSPOPPTR;
827 case SAVEt_HPTR: /* HV* reference */
829 *(HV**)ptr = (HV*)SSPOPPTR;
831 case SAVEt_APTR: /* AV* reference */
833 *(AV**)ptr = (AV*)SSPOPPTR;
837 (void)sv_clear((SV*)gv);
839 case SAVEt_GP: /* scalar reference */
842 if (SvPVX_const(gv) && SvLEN(gv) > 0) {
843 Safefree(SvPVX_const(gv));
845 SvPV_set(gv, (char *)SSPOPPTR);
846 SvCUR_set(gv, (STRLEN)SSPOPIV);
847 SvLEN_set(gv, (STRLEN)SSPOPIV);
851 PL_sub_generation++; /* putting a method back into circulation */
856 SvREFCNT_dec((SV*)ptr);
858 case SAVEt_MORTALIZESV:
860 sv_2mortal((SV*)ptr);
864 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
872 ptr = (void*)&PL_curpad[SSPOPLONG];
875 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
876 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
877 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
878 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
879 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
882 /* Can clear pad variable in place? */
883 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
885 * if a my variable that was made readonly is going out of
886 * scope, we want to remove the readonlyness so that it can
887 * go out of scope quietly
889 if (SvPADMY(sv) && !SvFAKE(sv))
892 if (SvTHINKFIRST(sv))
893 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
897 switch (SvTYPE(sv)) {
907 Perl_croak(aTHX_ "panic: leave_scope pad code");
912 SvPADSTALE_on(sv); /* mark as no longer live */
914 else { /* Someone has a claim on this, so abandon it. */
915 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
916 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
917 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
918 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
919 default: *(SV**)ptr = NEWSV(0,0); break;
921 SvREFCNT_dec(sv); /* Cast current value to the winds. */
922 /* preserve pad nature, but also mark as not live
923 * for any closure capturing */
924 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
931 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
935 case SAVEt_DESTRUCTOR:
939 case SAVEt_DESTRUCTOR_X:
941 (*SSPOPDXPTR)(aTHX_ ptr);
943 case SAVEt_REGCONTEXT:
946 PL_savestack_ix -= i; /* regexp must have croaked */
948 case SAVEt_STACK_POS: /* Position on Perl stack */
950 PL_stack_sp = PL_stack_base + i;
952 case SAVEt_AELEM: /* array element */
953 value = (SV*)SSPOPPTR;
956 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
958 ptr = av_fetch(av,i,1);
961 if (sv && sv != &PL_sv_undef) {
962 if (SvTIED_mg((SV*)av, PERL_MAGIC_tied))
963 (void)SvREFCNT_inc(sv);
970 case SAVEt_HELEM: /* hash element */
971 value = (SV*)SSPOPPTR;
974 ptr = hv_fetch_ent(hv, sv, 1, 0);
976 const SV * const oval = HeVAL((HE*)ptr);
977 if (oval && oval != &PL_sv_undef) {
978 ptr = &HeVAL((HE*)ptr);
979 if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
980 (void)SvREFCNT_inc(*(SV**)ptr);
982 av = (AV*)hv; /* what to refcnt_dec */
991 PL_op = (OP*)SSPOPPTR;
994 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
995 SvREFCNT_dec((SV*)GvHV(PL_hintgv));
996 GvHV(PL_hintgv) = NULL;
998 *(I32*)&PL_hints = (I32)SSPOPINT;
999 if (PL_hints & HINT_LOCALIZE_HH) {
1000 SvREFCNT_dec((SV*)GvHV(PL_hintgv));
1001 GvHV(PL_hintgv) = (HV*)SSPOPPTR;
1006 PL_comppad = (PAD*)SSPOPPTR;
1008 PL_curpad = AvARRAY(PL_comppad);
1010 PL_curpad = Null(SV**);
1014 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
1017 AvARRAY((PAD*)ptr)[off] = (SV*)SSPOPPTR;
1020 case SAVEt_SAVESWITCHSTACK:
1023 AV* t = (AV*)SSPOPPTR;
1024 AV* f = (AV*)SSPOPPTR;
1026 PL_curstackinfo->si_stack = f;
1029 case SAVEt_SET_SVFLAGS:
1031 const U32 val = (U32)SSPOPINT;
1032 const U32 mask = (U32)SSPOPINT;
1034 SvFLAGS(sv) &= ~mask;
1039 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1045 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1048 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1049 if (CxTYPE(cx) != CXt_SUBST) {
1050 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1051 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1052 PTR2UV(cx->blk_oldcop));
1053 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1054 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1055 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1056 PTR2UV(cx->blk_oldpm));
1057 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1059 switch (CxTYPE(cx)) {
1064 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1065 PTR2UV(cx->blk_sub.cv));
1066 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%"UVxf"\n",
1067 PTR2UV(cx->blk_sub.gv));
1068 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%"UVxf"\n",
1069 PTR2UV(cx->blk_sub.dfoutgv));
1070 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1071 (int)cx->blk_sub.hasargs);
1072 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1073 PTR2UV(cx->blk_sub.retop));
1076 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1077 PTR2UV(cx->blk_sub.cv));
1078 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1079 (long)cx->blk_sub.olddepth);
1080 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1081 (int)cx->blk_sub.hasargs);
1082 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n",
1083 (int)cx->blk_sub.lval);
1084 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1085 PTR2UV(cx->blk_sub.retop));
1088 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1089 (long)cx->blk_eval.old_in_eval);
1090 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1091 PL_op_name[cx->blk_eval.old_op_type],
1092 PL_op_desc[cx->blk_eval.old_op_type]);
1093 if (cx->blk_eval.old_namesv)
1094 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1095 SvPVX_const(cx->blk_eval.old_namesv));
1096 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1097 PTR2UV(cx->blk_eval.old_eval_root));
1098 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1099 PTR2UV(cx->blk_eval.retop));
1103 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
1104 cx->blk_loop.label);
1105 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1106 (long)cx->blk_loop.resetsp);
1107 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%"UVxf"\n",
1108 PTR2UV(cx->blk_loop.redo_op));
1109 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1110 PTR2UV(cx->blk_loop.next_op));
1111 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%"UVxf"\n",
1112 PTR2UV(cx->blk_loop.last_op));
1113 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1114 (long)cx->blk_loop.iterix);
1115 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1116 PTR2UV(cx->blk_loop.iterary));
1117 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1118 PTR2UV(CxITERVAR(cx)));
1120 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%"UVxf"\n",
1121 PTR2UV(cx->blk_loop.itersave));
1122 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%"UVxf"\n",
1123 PTR2UV(cx->blk_loop.iterlval));
1127 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1128 (long)cx->sb_iters);
1129 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1130 (long)cx->sb_maxiters);
1131 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1132 (long)cx->sb_rflags);
1133 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1135 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1137 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1138 PTR2UV(cx->sb_dstr));
1139 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1140 PTR2UV(cx->sb_targ));
1141 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1143 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1145 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1146 PTR2UV(cx->sb_strend));
1147 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1148 PTR2UV(cx->sb_rxres));
1151 #endif /* DEBUGGING */
1156 * c-indentation-style: bsd
1158 * indent-tabs-mode: t
1161 * ex: set ts=8 sts=4 sw=4 noet: