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
27 #if defined(PERL_FLEXIBLE_EXCEPTIONS)
29 Perl_default_protect(pTHX_ volatile JMPENV *pcur_env, int *excpt,
30 protect_body_t body, ...)
35 ret = vdefault_protect(pcur_env, excpt, body, &args);
41 Perl_vdefault_protect(pTHX_ volatile JMPENV *pcur_env, int *excpt,
42 protect_body_t body, va_list *args)
51 ret = CALL_FPTR(body)(aTHX_ *args);
59 Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
62 #ifndef STRESS_REALLOC
63 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
65 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
70 #ifndef STRESS_REALLOC
71 #define GROW(old) ((old) * 3 / 2)
73 #define GROW(old) ((old) + 1)
77 Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
80 New(56, si, 1, PERL_SI);
81 si->si_stack = newAV();
82 AvREAL_off(si->si_stack);
83 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
84 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
85 AvFILLp(si->si_stack) = 0;
88 si->si_cxmax = cxitems - 1;
90 si->si_type = PERLSI_UNDEF;
91 New(56, si->si_cxstack, cxitems, PERL_CONTEXT);
92 /* Without any kind of initialising PUSHSUBST()
93 * in pp_subst() will read uninitialised heap. */
94 Poison(si->si_cxstack, cxitems, PERL_CONTEXT);
101 const IV old_max = cxstack_max;
102 cxstack_max = GROW(cxstack_max);
103 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
104 /* Without any kind of initialising deep enough recursion
105 * will end up reading uninitialised PERL_CONTEXTs. */
106 Poison(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
107 return cxstack_ix + 1;
111 Perl_push_return(pTHX_ OP *retop)
113 if (PL_retstack_ix == PL_retstack_max) {
114 PL_retstack_max = GROW(PL_retstack_max);
115 Renew(PL_retstack, PL_retstack_max, OP*);
117 PL_retstack[PL_retstack_ix++] = retop;
121 Perl_pop_return(pTHX)
123 if (PL_retstack_ix > 0)
124 return PL_retstack[--PL_retstack_ix];
130 Perl_push_scope(pTHX)
132 if (PL_scopestack_ix == PL_scopestack_max) {
133 PL_scopestack_max = GROW(PL_scopestack_max);
134 Renew(PL_scopestack, PL_scopestack_max, I32);
136 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
143 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
144 LEAVE_SCOPE(oldsave);
148 Perl_markstack_grow(pTHX)
150 const I32 oldmax = PL_markstack_max - PL_markstack;
151 const I32 newmax = GROW(oldmax);
153 Renew(PL_markstack, newmax, I32);
154 PL_markstack_ptr = PL_markstack + oldmax;
155 PL_markstack_max = PL_markstack + newmax;
159 Perl_savestack_grow(pTHX)
161 PL_savestack_max = GROW(PL_savestack_max) + 4;
162 Renew(PL_savestack, PL_savestack_max, ANY);
166 Perl_savestack_grow_cnt(pTHX_ I32 need)
168 PL_savestack_max = PL_savestack_ix + need;
169 Renew(PL_savestack, PL_savestack_max, ANY);
175 Perl_tmps_grow(pTHX_ I32 n)
177 #ifndef STRESS_REALLOC
179 n = (PL_tmps_max < 512) ? 128 : 512;
181 PL_tmps_max = PL_tmps_ix + n + 1;
182 Renew(PL_tmps_stack, PL_tmps_max, SV*);
189 /* XXX should tmps_floor live in cxstack? */
190 const I32 myfloor = PL_tmps_floor;
191 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
192 SV* sv = PL_tmps_stack[PL_tmps_ix];
193 PL_tmps_stack[PL_tmps_ix--] = Nullsv;
194 if (sv && sv != &PL_sv_undef) {
196 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
202 S_save_scalar_at(pTHX_ SV **sptr)
207 sv = *sptr = NEWSV(0,0);
208 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
209 sv_upgrade(sv, SvTYPE(osv));
210 if (SvGMAGICAL(osv)) {
212 const bool oldtainted = PL_tainted;
213 mg_get(osv); /* note, can croak! */
214 if (PL_tainting && PL_tainted &&
215 (mg = mg_find(osv, PERL_MAGIC_taint))) {
216 SAVESPTR(mg->mg_obj);
219 SvFLAGS(osv) |= (SvFLAGS(osv) &
220 (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
221 PL_tainted = oldtainted;
223 SvMAGIC_set(sv, SvMAGIC(osv));
224 SvFLAGS(sv) |= SvMAGICAL(osv);
225 /* XXX SvMAGIC() is *shared* between osv and sv. This can
226 * lead to coredumps when both SVs are destroyed without one
227 * of their SvMAGIC() slots being NULLed. */
236 Perl_save_scalar(pTHX_ GV *gv)
238 SV **sptr = &GvSV(gv);
240 SSPUSHPTR(SvREFCNT_inc(gv));
241 SSPUSHPTR(SvREFCNT_inc(*sptr));
243 return save_scalar_at(sptr);
247 Perl_save_svref(pTHX_ SV **sptr)
251 SSPUSHPTR(SvREFCNT_inc(*sptr));
252 SSPUSHINT(SAVEt_SVREF);
253 return save_scalar_at(sptr);
256 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
257 * restore a global SV to its prior contents, freeing new value. */
259 Perl_save_generic_svref(pTHX_ SV **sptr)
263 SSPUSHPTR(SvREFCNT_inc(*sptr));
264 SSPUSHINT(SAVEt_GENERIC_SVREF);
267 /* Like save_pptr(), but also Safefree()s the new value if it is different
268 * from the old one. Can be used to restore a global char* to its prior
269 * contents, freeing new value. */
271 Perl_save_generic_pvref(pTHX_ char **str)
276 SSPUSHINT(SAVEt_GENERIC_PVREF);
279 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
280 * Can be used to restore a shared global char* to its prior
281 * contents, freeing new value. */
283 Perl_save_shared_pvref(pTHX_ char **str)
288 SSPUSHINT(SAVEt_SHARED_PVREF);
292 Perl_save_gp(pTHX_ GV *gv, I32 empty)
295 SSPUSHIV((IV)SvLEN(gv));
296 SvLEN_set(gv, 0); /* forget that anything was allocated here */
297 SSPUSHIV((IV)SvCUR(gv));
298 SSPUSHPTR(SvPVX_const(gv));
300 SSPUSHPTR(SvREFCNT_inc(gv));
307 Newz(602, gp, 1, GP);
310 PL_sub_generation++; /* taking a method out of circulation */
311 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
313 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
315 GvGP(gv) = gp_ref(gp);
316 GvSV(gv) = NEWSV(72,0);
317 GvLINE(gv) = CopLINE(PL_curcop);
318 /* XXX Ideally this cast would be replaced with a change to const char*
320 GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) "";
330 Perl_save_ary(pTHX_ GV *gv)
335 if (!AvREAL(oav) && AvREIFY(oav))
342 GvAV(gv) = Null(AV*);
345 SvMAGIC_set(av, SvMAGIC(oav));
346 SvFLAGS((SV*)av) |= SvMAGICAL(oav);
348 SvMAGIC_set(oav, NULL);
357 Perl_save_hash(pTHX_ GV *gv)
363 SSPUSHPTR(ohv = GvHVn(gv));
366 GvHV(gv) = Null(HV*);
369 SvMAGIC_set(hv, SvMAGIC(ohv));
370 SvFLAGS((SV*)hv) |= SvMAGICAL(ohv);
372 SvMAGIC_set(ohv, NULL);
381 Perl_save_item(pTHX_ register SV *item)
383 register SV *sv = newSVsv(item);
386 SSPUSHPTR(item); /* remember the pointer */
387 SSPUSHPTR(sv); /* remember the value */
388 SSPUSHINT(SAVEt_ITEM);
392 Perl_save_int(pTHX_ int *intp)
397 SSPUSHINT(SAVEt_INT);
401 Perl_save_long(pTHX_ long int *longp)
406 SSPUSHINT(SAVEt_LONG);
410 Perl_save_bool(pTHX_ bool *boolp)
415 SSPUSHINT(SAVEt_BOOL);
419 Perl_save_I32(pTHX_ I32 *intp)
424 SSPUSHINT(SAVEt_I32);
428 Perl_save_I16(pTHX_ I16 *intp)
433 SSPUSHINT(SAVEt_I16);
437 Perl_save_I8(pTHX_ I8 *bytep)
446 Perl_save_iv(pTHX_ IV *ivp)
454 /* Cannot use save_sptr() to store a char* since the SV** cast will
455 * force word-alignment and we'll miss the pointer.
458 Perl_save_pptr(pTHX_ char **pptr)
463 SSPUSHINT(SAVEt_PPTR);
467 Perl_save_vptr(pTHX_ void *ptr)
470 SSPUSHPTR(*(char**)ptr);
472 SSPUSHINT(SAVEt_VPTR);
476 Perl_save_sptr(pTHX_ SV **sptr)
481 SSPUSHINT(SAVEt_SPTR);
485 Perl_save_padsv(pTHX_ PADOFFSET off)
488 ASSERT_CURPAD_ACTIVE("save_padsv");
489 SSPUSHPTR(PL_curpad[off]);
490 SSPUSHPTR(PL_comppad);
491 SSPUSHLONG((long)off);
492 SSPUSHINT(SAVEt_PADSV);
496 Perl_save_threadsv(pTHX_ PADOFFSET i)
498 #ifdef USE_5005THREADS
499 SV **svp = &THREADSV(i); /* XXX Change to save by offset */
500 DEBUG_S(PerlIO_printf(Perl_debug_log, "save_threadsv %"UVuf": %p %p:%s\n",
501 (UV)i, svp, *svp, SvPEEK(*svp)));
505 Perl_croak(aTHX_ "panic: save_threadsv called in non-threaded perl");
507 NORETURN_FUNCTION_END;
508 #endif /* USE_5005THREADS */
512 Perl_save_nogv(pTHX_ GV *gv)
516 SSPUSHINT(SAVEt_NSTAB);
520 Perl_save_hptr(pTHX_ HV **hptr)
525 SSPUSHINT(SAVEt_HPTR);
529 Perl_save_aptr(pTHX_ AV **aptr)
534 SSPUSHINT(SAVEt_APTR);
538 Perl_save_freesv(pTHX_ SV *sv)
542 SSPUSHINT(SAVEt_FREESV);
546 Perl_save_mortalizesv(pTHX_ SV *sv)
550 SSPUSHINT(SAVEt_MORTALIZESV);
554 Perl_save_freeop(pTHX_ OP *o)
558 SSPUSHINT(SAVEt_FREEOP);
562 Perl_save_freepv(pTHX_ char *pv)
566 SSPUSHINT(SAVEt_FREEPV);
570 Perl_save_clearsv(pTHX_ SV **svp)
572 ASSERT_CURPAD_ACTIVE("save_clearsv");
574 SSPUSHLONG((long)(svp-PL_curpad));
575 SSPUSHINT(SAVEt_CLEARSV);
579 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
584 SSPUSHPTR(SvREFCNT_inc(hv));
585 SSPUSHINT(SAVEt_DELETE);
589 Perl_save_list(pTHX_ register SV **sarg, I32 maxsarg)
594 for (i = 1; i <= maxsarg; i++) {
596 sv_setsv(sv,sarg[i]);
598 SSPUSHPTR(sarg[i]); /* remember the pointer */
599 SSPUSHPTR(sv); /* remember the value */
600 SSPUSHINT(SAVEt_ITEM);
605 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
610 SSPUSHINT(SAVEt_DESTRUCTOR);
614 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
619 SSPUSHINT(SAVEt_DESTRUCTOR_X);
623 Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
627 SSPUSHPTR(SvREFCNT_inc(av));
629 SSPUSHPTR(SvREFCNT_inc(*sptr));
630 SSPUSHINT(SAVEt_AELEM);
631 /* if it gets reified later, the restore will have the wrong refcnt */
632 if (!AvREAL(av) && AvREIFY(av))
633 (void)SvREFCNT_inc(*sptr);
634 save_scalar_at(sptr);
636 /* If we're localizing a tied array element, this new sv
637 * won't actually be stored in the array - so it won't get
638 * reaped when the localize ends. Ensure it gets reaped by
639 * mortifying it instead. DAPM */
640 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
645 Perl_save_helem(pTHX_ HV *hv, SV *key, SV **sptr)
649 SSPUSHPTR(SvREFCNT_inc(hv));
650 SSPUSHPTR(SvREFCNT_inc(key));
651 SSPUSHPTR(SvREFCNT_inc(*sptr));
652 SSPUSHINT(SAVEt_HELEM);
653 save_scalar_at(sptr);
655 /* If we're localizing a tied hash element, this new sv
656 * won't actually be stored in the hash - so it won't get
657 * reaped when the localize ends. Ensure it gets reaped by
658 * mortifying it instead. DAPM */
659 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
672 Perl_save_alloc(pTHX_ I32 size, I32 pad)
674 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
675 - (char*)PL_savestack);
676 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
678 /* SSCHECK may not be good enough */
679 while (PL_savestack_ix + elems + 2 > PL_savestack_max)
682 PL_savestack_ix += elems;
684 SSPUSHINT(SAVEt_ALLOC);
689 Perl_leave_scope(pTHX_ I32 base)
701 Perl_croak(aTHX_ "panic: corrupt saved stack index");
702 while (PL_savestack_ix > base) {
704 case SAVEt_ITEM: /* normal string */
705 value = (SV*)SSPOPPTR;
707 sv_replace(sv,value);
712 case SAVEt_SV: /* scalar reference */
713 value = (SV*)SSPOPPTR;
716 av = (AV*)gv; /* what to refcnt_dec */
718 case SAVEt_GENERIC_PVREF: /* generic pv */
719 str = (char*)SSPOPPTR;
721 if (*(char**)ptr != str) {
722 Safefree(*(char**)ptr);
726 case SAVEt_SHARED_PVREF: /* shared pv */
727 str = (char*)SSPOPPTR;
729 if (*(char**)ptr != str) {
731 PerlMem_free(*(char**)ptr);
733 PerlMemShared_free(*(char**)ptr);
738 case SAVEt_GENERIC_SVREF: /* generic sv */
739 value = (SV*)SSPOPPTR;
746 case SAVEt_SVREF: /* scalar reference */
747 value = (SV*)SSPOPPTR;
749 av = Nullav; /* what to refcnt_dec */
752 DEBUG_S(PerlIO_printf(Perl_debug_log,
753 "restore svref: %p %p:%s -> %p:%s\n",
754 ptr, sv, SvPEEK(sv), value, SvPEEK(value)));
755 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
756 SvTYPE(sv) != SVt_PVGV)
758 (void)SvUPGRADE(value, SvTYPE(sv));
759 SvMAGIC_set(value, SvMAGIC(sv));
760 SvFLAGS(value) |= SvMAGICAL(sv);
764 /* XXX This branch is pretty bogus. This code irretrievably
765 * clears(!) the magic on the SV (either to avoid further
766 * croaking that might ensue when the SvSETMAGIC() below is
767 * called, or to avoid two different SVs pointing at the same
768 * SvMAGIC()). This needs a total rethink. --GSAR */
769 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
770 SvTYPE(value) != SVt_PVGV)
772 SvFLAGS(value) |= (SvFLAGS(value) &
773 (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
774 SvMAGICAL_off(value);
775 /* XXX this is a leak when we get here because the
776 * mg_get() in save_scalar_at() croaked */
777 SvMAGIC_set(value, NULL);
785 if (av) /* actually an av, hv or gv */
788 case SAVEt_AV: /* array reference */
792 AV * const goner = GvAV(gv);
793 SvMAGIC_set(av, SvMAGIC(goner));
794 SvFLAGS((SV*)av) |= SvMAGICAL(goner);
795 SvMAGICAL_off(goner);
796 SvMAGIC_set(goner, NULL);
806 case SAVEt_HV: /* hash reference */
810 HV * const goner = GvHV(gv);
811 SvMAGIC_set(hv, SvMAGIC(goner));
812 SvFLAGS(hv) |= SvMAGICAL(goner);
813 SvMAGICAL_off(goner);
814 SvMAGIC_set(goner, NULL);
824 case SAVEt_INT: /* int reference */
826 *(int*)ptr = (int)SSPOPINT;
828 case SAVEt_LONG: /* long reference */
830 *(long*)ptr = (long)SSPOPLONG;
832 case SAVEt_BOOL: /* bool reference */
834 *(bool*)ptr = (bool)SSPOPBOOL;
836 case SAVEt_I32: /* I32 reference */
838 *(I32*)ptr = (I32)SSPOPINT;
840 case SAVEt_I16: /* I16 reference */
842 *(I16*)ptr = (I16)SSPOPINT;
844 case SAVEt_I8: /* I8 reference */
846 *(I8*)ptr = (I8)SSPOPINT;
848 case SAVEt_IV: /* IV reference */
850 *(IV*)ptr = (IV)SSPOPIV;
852 case SAVEt_SPTR: /* SV* reference */
854 *(SV**)ptr = (SV*)SSPOPPTR;
856 case SAVEt_VPTR: /* random* reference */
857 case SAVEt_PPTR: /* char* reference */
859 *(char**)ptr = (char*)SSPOPPTR;
861 case SAVEt_HPTR: /* HV* reference */
863 *(HV**)ptr = (HV*)SSPOPPTR;
865 case SAVEt_APTR: /* AV* reference */
867 *(AV**)ptr = (AV*)SSPOPPTR;
871 (void)sv_clear((SV*)gv);
873 case SAVEt_GP: /* scalar reference */
876 if (SvPVX_const(gv) && SvLEN(gv) > 0) {
877 Safefree(SvPVX_const(gv));
879 SvPV_set(gv, (char *)SSPOPPTR);
880 SvCUR_set(gv, (STRLEN)SSPOPIV);
881 SvLEN_set(gv, (STRLEN)SSPOPIV);
885 PL_sub_generation++; /* putting a method back into circulation */
890 SvREFCNT_dec((SV*)ptr);
892 case SAVEt_MORTALIZESV:
894 sv_2mortal((SV*)ptr);
898 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
906 ptr = (void*)&PL_curpad[SSPOPLONG];
909 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
910 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
911 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
912 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
913 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
916 /* Can clear pad variable in place? */
917 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
919 * if a my variable that was made readonly is going out of
920 * scope, we want to remove the readonlyness so that it can
921 * go out of scope quietly
923 if (SvPADMY(sv) && !SvFAKE(sv))
926 if (SvTHINKFIRST(sv))
927 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
931 switch (SvTYPE(sv)) {
941 Perl_croak(aTHX_ "panic: leave_scope pad code");
947 else { /* Someone has a claim on this, so abandon it. */
949 = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
950 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
951 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
952 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
953 default: *(SV**)ptr = NEWSV(0,0); break;
955 SvREFCNT_dec(sv); /* Cast current value to the winds. */
956 SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
963 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
967 case SAVEt_DESTRUCTOR:
971 case SAVEt_DESTRUCTOR_X:
973 (*SSPOPDXPTR)(aTHX_ ptr);
975 case SAVEt_REGCONTEXT:
978 PL_savestack_ix -= i; /* regexp must have croaked */
980 case SAVEt_STACK_POS: /* Position on Perl stack */
982 PL_stack_sp = PL_stack_base + i;
984 case SAVEt_AELEM: /* array element */
985 value = (SV*)SSPOPPTR;
988 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
990 ptr = av_fetch(av,i,1);
993 if (sv && sv != &PL_sv_undef) {
994 if (SvTIED_mg((SV*)av, PERL_MAGIC_tied))
995 (void)SvREFCNT_inc(sv);
1000 SvREFCNT_dec(value);
1002 case SAVEt_HELEM: /* hash element */
1003 value = (SV*)SSPOPPTR;
1006 ptr = hv_fetch_ent(hv, sv, 1, 0);
1008 const SV * const oval = HeVAL((HE*)ptr);
1009 if (oval && oval != &PL_sv_undef) {
1010 ptr = &HeVAL((HE*)ptr);
1011 if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1012 (void)SvREFCNT_inc(*(SV**)ptr);
1014 av = (AV*)hv; /* what to refcnt_dec */
1020 SvREFCNT_dec(value);
1023 PL_op = (OP*)SSPOPPTR;
1026 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
1027 SvREFCNT_dec((SV*)GvHV(PL_hintgv));
1028 GvHV(PL_hintgv) = NULL;
1030 *(I32*)&PL_hints = (I32)SSPOPINT;
1031 if (PL_hints & HINT_LOCALIZE_HH) {
1032 SvREFCNT_dec((SV*)GvHV(PL_hintgv));
1033 GvHV(PL_hintgv) = (HV*)SSPOPPTR;
1038 PL_comppad = (PAD*)SSPOPPTR;
1040 PL_curpad = AvARRAY(PL_comppad);
1042 PL_curpad = Null(SV**);
1046 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
1049 AvARRAY((PAD*)ptr)[off] = (SV*)SSPOPPTR;
1052 case SAVEt_SAVESWITCHSTACK:
1055 AV* t = (AV*)SSPOPPTR;
1056 AV* f = (AV*)SSPOPPTR;
1058 PL_curstackinfo->si_stack = f;
1062 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1068 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1071 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1072 if (CxTYPE(cx) != CXt_SUBST) {
1073 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1074 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1075 PTR2UV(cx->blk_oldcop));
1076 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1077 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1078 PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
1079 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1080 PTR2UV(cx->blk_oldpm));
1081 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1083 switch (CxTYPE(cx)) {
1088 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1089 PTR2UV(cx->blk_sub.cv));
1090 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%"UVxf"\n",
1091 PTR2UV(cx->blk_sub.gv));
1092 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%"UVxf"\n",
1093 PTR2UV(cx->blk_sub.dfoutgv));
1094 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1095 (int)cx->blk_sub.hasargs);
1098 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1099 PTR2UV(cx->blk_sub.cv));
1100 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1101 (long)cx->blk_sub.olddepth);
1102 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1103 (int)cx->blk_sub.hasargs);
1104 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n",
1105 (int)cx->blk_sub.lval);
1108 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1109 (long)cx->blk_eval.old_in_eval);
1110 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1111 PL_op_name[cx->blk_eval.old_op_type],
1112 PL_op_desc[cx->blk_eval.old_op_type]);
1113 if (cx->blk_eval.old_namesv)
1114 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1115 SvPVX_const(cx->blk_eval.old_namesv));
1116 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1117 PTR2UV(cx->blk_eval.old_eval_root));
1121 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
1122 cx->blk_loop.label);
1123 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1124 (long)cx->blk_loop.resetsp);
1125 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%"UVxf"\n",
1126 PTR2UV(cx->blk_loop.redo_op));
1127 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1128 PTR2UV(cx->blk_loop.next_op));
1129 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%"UVxf"\n",
1130 PTR2UV(cx->blk_loop.last_op));
1131 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1132 (long)cx->blk_loop.iterix);
1133 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1134 PTR2UV(cx->blk_loop.iterary));
1135 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1136 PTR2UV(CxITERVAR(cx)));
1138 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%"UVxf"\n",
1139 PTR2UV(cx->blk_loop.itersave));
1140 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%"UVxf"\n",
1141 PTR2UV(cx->blk_loop.iterlval));
1145 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1146 (long)cx->sb_iters);
1147 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1148 (long)cx->sb_maxiters);
1149 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1150 (long)cx->sb_rflags);
1151 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1153 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1155 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1156 PTR2UV(cx->sb_dstr));
1157 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1158 PTR2UV(cx->sb_targ));
1159 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1161 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1163 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1164 PTR2UV(cx->sb_strend));
1165 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1166 PTR2UV(cx->sb_rxres));
1169 #endif /* DEBUGGING */
1174 * c-indentation-style: bsd
1176 * indent-tabs-mode: t
1179 * ex: set ts=8 sts=4 sw=4 noet: