3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
4 * 2000, 2001, 2002, 2003, 2004, 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 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_scope(pTHX)
113 if (PL_scopestack_ix == PL_scopestack_max) {
114 PL_scopestack_max = GROW(PL_scopestack_max);
115 Renew(PL_scopestack, PL_scopestack_max, I32);
117 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
124 I32 oldsave = PL_scopestack[--PL_scopestack_ix];
125 LEAVE_SCOPE(oldsave);
129 Perl_markstack_grow(pTHX)
131 I32 oldmax = PL_markstack_max - PL_markstack;
132 I32 newmax = GROW(oldmax);
134 Renew(PL_markstack, newmax, I32);
135 PL_markstack_ptr = PL_markstack + oldmax;
136 PL_markstack_max = PL_markstack + newmax;
140 Perl_savestack_grow(pTHX)
142 PL_savestack_max = GROW(PL_savestack_max) + 4;
143 Renew(PL_savestack, PL_savestack_max, ANY);
147 Perl_savestack_grow_cnt(pTHX_ I32 need)
149 PL_savestack_max = PL_savestack_ix + need;
150 Renew(PL_savestack, PL_savestack_max, ANY);
156 Perl_tmps_grow(pTHX_ I32 n)
158 #ifndef STRESS_REALLOC
160 n = (PL_tmps_max < 512) ? 128 : 512;
162 PL_tmps_max = PL_tmps_ix + n + 1;
163 Renew(PL_tmps_stack, PL_tmps_max, SV*);
170 /* XXX should tmps_floor live in cxstack? */
171 I32 myfloor = PL_tmps_floor;
172 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
173 SV* sv = PL_tmps_stack[PL_tmps_ix];
174 PL_tmps_stack[PL_tmps_ix--] = Nullsv;
175 if (sv && sv != &PL_sv_undef) {
177 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
183 S_save_scalar_at(pTHX_ SV **sptr)
188 sv = *sptr = NEWSV(0,0);
189 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
191 sv_upgrade(sv, SvTYPE(osv));
192 if (SvGMAGICAL(osv)) {
193 bool oldtainted = PL_tainted;
194 mg_get(osv); /* note, can croak! */
195 if (PL_tainting && PL_tainted &&
196 (mg = mg_find(osv, PERL_MAGIC_taint))) {
197 SAVESPTR(mg->mg_obj);
200 SvFLAGS(osv) |= (SvFLAGS(osv) &
201 (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
202 PL_tainted = oldtainted;
204 SvMAGIC(sv) = SvMAGIC(osv);
205 /* if it's a special scalar or if it has no 'set' magic,
206 * propagate the SvREADONLY flag. --rgs 20030922 */
207 for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
208 if (mg->mg_type == '\0'
209 || !(mg->mg_virtual && mg->mg_virtual->svt_set))
211 SvFLAGS(sv) |= SvREADONLY(osv);
215 SvFLAGS(sv) |= SvMAGICAL(osv);
216 /* XXX SvMAGIC() is *shared* between osv and sv. This can
217 * lead to coredumps when both SVs are destroyed without one
218 * of their SvMAGIC() slots being NULLed. */
227 Perl_save_scalar(pTHX_ GV *gv)
229 SV **sptr = &GvSV(gv);
231 SSPUSHPTR(SvREFCNT_inc(gv));
232 SSPUSHPTR(SvREFCNT_inc(*sptr));
234 return save_scalar_at(sptr);
238 Perl_save_svref(pTHX_ SV **sptr)
242 SSPUSHPTR(SvREFCNT_inc(*sptr));
243 SSPUSHINT(SAVEt_SVREF);
244 return save_scalar_at(sptr);
247 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
248 * restore a global SV to its prior contents, freeing new value. */
250 Perl_save_generic_svref(pTHX_ SV **sptr)
254 SSPUSHPTR(SvREFCNT_inc(*sptr));
255 SSPUSHINT(SAVEt_GENERIC_SVREF);
258 /* Like save_pptr(), but also Safefree()s the new value if it is different
259 * from the old one. Can be used to restore a global char* to its prior
260 * contents, freeing new value. */
262 Perl_save_generic_pvref(pTHX_ char **str)
267 SSPUSHINT(SAVEt_GENERIC_PVREF);
270 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
271 * Can be used to restore a shared global char* to its prior
272 * contents, freeing new value. */
274 Perl_save_shared_pvref(pTHX_ char **str)
279 SSPUSHINT(SAVEt_SHARED_PVREF);
282 /* set the SvFLAGS specified by mask to the values in val */
285 Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
291 SSPUSHINT(SAVEt_SET_SVFLAGS);
295 Perl_save_gp(pTHX_ GV *gv, I32 empty)
298 SSPUSHIV((IV)SvLEN(gv));
299 SvLEN(gv) = 0; /* forget that anything was allocated here */
300 SSPUSHIV((IV)SvCUR(gv));
301 SSPUSHPTR(SvPVX(gv));
303 SSPUSHPTR(SvREFCNT_inc(gv));
310 Newz(602, gp, 1, GP);
313 PL_sub_generation++; /* taking a method out of circulation */
314 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
316 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
318 GvGP(gv) = gp_ref(gp);
319 GvSV(gv) = NEWSV(72,0);
320 GvLINE(gv) = CopLINE(PL_curcop);
321 GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
331 Perl_save_ary(pTHX_ GV *gv)
336 if (!AvREAL(oav) && AvREIFY(oav))
343 GvAV(gv) = Null(AV*);
346 SvMAGIC(av) = SvMAGIC(oav);
347 SvFLAGS((SV*)av) |= SvMAGICAL(oav);
358 Perl_save_hash(pTHX_ GV *gv)
364 SSPUSHPTR(ohv = GvHVn(gv));
367 GvHV(gv) = Null(HV*);
370 SvMAGIC(hv) = SvMAGIC(ohv);
371 SvFLAGS((SV*)hv) |= SvMAGICAL(ohv);
382 Perl_save_item(pTHX_ register SV *item)
384 register SV *sv = NEWSV(0,0);
388 SSPUSHPTR(item); /* remember the pointer */
389 SSPUSHPTR(sv); /* remember the value */
390 SSPUSHINT(SAVEt_ITEM);
394 Perl_save_int(pTHX_ int *intp)
399 SSPUSHINT(SAVEt_INT);
403 Perl_save_long(pTHX_ long int *longp)
408 SSPUSHINT(SAVEt_LONG);
412 Perl_save_bool(pTHX_ bool *boolp)
417 SSPUSHINT(SAVEt_BOOL);
421 Perl_save_I32(pTHX_ I32 *intp)
426 SSPUSHINT(SAVEt_I32);
430 Perl_save_I16(pTHX_ I16 *intp)
435 SSPUSHINT(SAVEt_I16);
439 Perl_save_I8(pTHX_ I8 *bytep)
448 Perl_save_iv(pTHX_ IV *ivp)
456 /* Cannot use save_sptr() to store a char* since the SV** cast will
457 * force word-alignment and we'll miss the pointer.
460 Perl_save_pptr(pTHX_ char **pptr)
465 SSPUSHINT(SAVEt_PPTR);
469 Perl_save_vptr(pTHX_ void *ptr)
472 SSPUSHPTR(*(char**)ptr);
474 SSPUSHINT(SAVEt_VPTR);
478 Perl_save_sptr(pTHX_ SV **sptr)
483 SSPUSHINT(SAVEt_SPTR);
487 Perl_save_padsv(pTHX_ PADOFFSET off)
490 ASSERT_CURPAD_ACTIVE("save_padsv");
491 SSPUSHPTR(PL_curpad[off]);
492 SSPUSHPTR(PL_comppad);
493 SSPUSHLONG((long)off);
494 SSPUSHINT(SAVEt_PADSV);
498 Perl_save_threadsv(pTHX_ PADOFFSET i)
500 Perl_croak(aTHX_ "panic: save_threadsv called in non-threaded perl");
505 Perl_save_nogv(pTHX_ GV *gv)
509 SSPUSHINT(SAVEt_NSTAB);
513 Perl_save_hptr(pTHX_ HV **hptr)
518 SSPUSHINT(SAVEt_HPTR);
522 Perl_save_aptr(pTHX_ AV **aptr)
527 SSPUSHINT(SAVEt_APTR);
531 Perl_save_freesv(pTHX_ SV *sv)
535 SSPUSHINT(SAVEt_FREESV);
539 Perl_save_mortalizesv(pTHX_ SV *sv)
543 SSPUSHINT(SAVEt_MORTALIZESV);
547 Perl_save_freeop(pTHX_ OP *o)
551 SSPUSHINT(SAVEt_FREEOP);
555 Perl_save_freepv(pTHX_ char *pv)
559 SSPUSHINT(SAVEt_FREEPV);
563 Perl_save_clearsv(pTHX_ SV **svp)
565 ASSERT_CURPAD_ACTIVE("save_clearsv");
567 SSPUSHLONG((long)(svp-PL_curpad));
568 SSPUSHINT(SAVEt_CLEARSV);
569 SvPADSTALE_off(*svp); /* mark lexical as active */
573 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
578 SSPUSHPTR(SvREFCNT_inc(hv));
579 SSPUSHINT(SAVEt_DELETE);
583 Perl_save_list(pTHX_ register SV **sarg, I32 maxsarg)
588 for (i = 1; i <= maxsarg; i++) {
590 sv_setsv(sv,sarg[i]);
592 SSPUSHPTR(sarg[i]); /* remember the pointer */
593 SSPUSHPTR(sv); /* remember the value */
594 SSPUSHINT(SAVEt_ITEM);
599 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
604 SSPUSHINT(SAVEt_DESTRUCTOR);
608 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
613 SSPUSHINT(SAVEt_DESTRUCTOR_X);
617 Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
621 SSPUSHPTR(SvREFCNT_inc(av));
623 SSPUSHPTR(SvREFCNT_inc(*sptr));
624 SSPUSHINT(SAVEt_AELEM);
625 /* if it gets reified later, the restore will have the wrong refcnt */
626 if (!AvREAL(av) && AvREIFY(av))
628 save_scalar_at(sptr);
630 /* If we're localizing a tied array element, this new sv
631 * won't actually be stored in the array - so it won't get
632 * reaped when the localize ends. Ensure it gets reaped by
633 * mortifying it instead. DAPM */
634 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
639 Perl_save_helem(pTHX_ HV *hv, SV *key, SV **sptr)
643 SSPUSHPTR(SvREFCNT_inc(hv));
644 SSPUSHPTR(SvREFCNT_inc(key));
645 SSPUSHPTR(SvREFCNT_inc(*sptr));
646 SSPUSHINT(SAVEt_HELEM);
647 save_scalar_at(sptr);
649 /* If we're localizing a tied hash element, this new sv
650 * won't actually be stored in the hash - so it won't get
651 * reaped when the localize ends. Ensure it gets reaped by
652 * mortifying it instead. DAPM */
653 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
666 Perl_save_alloc(pTHX_ I32 size, I32 pad)
668 register I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
669 - (char*)PL_savestack);
670 register I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
672 /* SSCHECK may not be good enough */
673 while (PL_savestack_ix + elems + 2 > PL_savestack_max)
676 PL_savestack_ix += elems;
678 SSPUSHINT(SAVEt_ALLOC);
683 Perl_leave_scope(pTHX_ I32 base)
695 Perl_croak(aTHX_ "panic: corrupt saved stack index");
696 while (PL_savestack_ix > base) {
698 case SAVEt_ITEM: /* normal string */
699 value = (SV*)SSPOPPTR;
701 sv_replace(sv,value);
706 case SAVEt_SV: /* scalar reference */
707 value = (SV*)SSPOPPTR;
710 av = (AV*)gv; /* what to refcnt_dec */
712 case SAVEt_GENERIC_PVREF: /* generic pv */
713 str = (char*)SSPOPPTR;
715 if (*(char**)ptr != str) {
716 Safefree(*(char**)ptr);
720 case SAVEt_SHARED_PVREF: /* shared pv */
721 str = (char*)SSPOPPTR;
723 if (*(char**)ptr != str) {
725 PerlMem_free(*(char**)ptr);
727 PerlMemShared_free(*(char**)ptr);
732 case SAVEt_GENERIC_SVREF: /* generic sv */
733 value = (SV*)SSPOPPTR;
740 case SAVEt_SVREF: /* scalar reference */
741 value = (SV*)SSPOPPTR;
743 av = Nullav; /* what to refcnt_dec */
746 DEBUG_S(PerlIO_printf(Perl_debug_log,
747 "restore svref: %p %p:%s -> %p:%s\n",
748 ptr, sv, SvPEEK(sv), value, SvPEEK(value)));
749 if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
750 SvTYPE(sv) != SVt_PVGV)
752 (void)SvUPGRADE(value, SvTYPE(sv));
753 SvMAGIC(value) = SvMAGIC(sv);
754 SvFLAGS(value) |= SvMAGICAL(sv);
758 /* XXX This branch is pretty bogus. This code irretrievably
759 * clears(!) the magic on the SV (either to avoid further
760 * croaking that might ensue when the SvSETMAGIC() below is
761 * called, or to avoid two different SVs pointing at the same
762 * SvMAGIC()). This needs a total rethink. --GSAR */
763 else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
764 SvTYPE(value) != SVt_PVGV)
766 SvFLAGS(value) |= (SvFLAGS(value) &
767 (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
768 SvMAGICAL_off(value);
769 /* XXX this is a leak when we get here because the
770 * mg_get() in save_scalar_at() croaked */
779 if (av) /* actually an av, hv or gv */
782 case SAVEt_AV: /* array reference */
786 AV *goner = GvAV(gv);
787 SvMAGIC(av) = SvMAGIC(goner);
788 SvFLAGS((SV*)av) |= SvMAGICAL(goner);
789 SvMAGICAL_off(goner);
800 case SAVEt_HV: /* hash reference */
804 HV *goner = GvHV(gv);
805 SvMAGIC(hv) = SvMAGIC(goner);
806 SvFLAGS(hv) |= SvMAGICAL(goner);
807 SvMAGICAL_off(goner);
818 case SAVEt_INT: /* int reference */
820 *(int*)ptr = (int)SSPOPINT;
822 case SAVEt_LONG: /* long reference */
824 *(long*)ptr = (long)SSPOPLONG;
826 case SAVEt_BOOL: /* bool reference */
828 *(bool*)ptr = (bool)SSPOPBOOL;
830 case SAVEt_I32: /* I32 reference */
832 *(I32*)ptr = (I32)SSPOPINT;
834 case SAVEt_I16: /* I16 reference */
836 *(I16*)ptr = (I16)SSPOPINT;
838 case SAVEt_I8: /* I8 reference */
840 *(I8*)ptr = (I8)SSPOPINT;
842 case SAVEt_IV: /* IV reference */
844 *(IV*)ptr = (IV)SSPOPIV;
846 case SAVEt_SPTR: /* SV* reference */
848 *(SV**)ptr = (SV*)SSPOPPTR;
850 case SAVEt_VPTR: /* random* reference */
851 case SAVEt_PPTR: /* char* reference */
853 *(char**)ptr = (char*)SSPOPPTR;
855 case SAVEt_HPTR: /* HV* reference */
857 *(HV**)ptr = (HV*)SSPOPPTR;
859 case SAVEt_APTR: /* AV* reference */
861 *(AV**)ptr = (AV*)SSPOPPTR;
865 (void)sv_clear((SV*)gv);
867 case SAVEt_GP: /* scalar reference */
870 if (SvPVX(gv) && SvLEN(gv) > 0) {
873 SvPVX(gv) = (char *)SSPOPPTR;
874 SvCUR(gv) = (STRLEN)SSPOPIV;
875 SvLEN(gv) = (STRLEN)SSPOPIV;
879 PL_sub_generation++; /* putting a method back into circulation */
884 SvREFCNT_dec((SV*)ptr);
886 case SAVEt_MORTALIZESV:
888 sv_2mortal((SV*)ptr);
892 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
897 Safefree((char*)ptr);
900 ptr = (void*)&PL_curpad[SSPOPLONG];
903 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
904 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
905 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
906 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
907 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
910 /* Can clear pad variable in place? */
911 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
913 * if a my variable that was made readonly is going out of
914 * scope, we want to remove the readonlyness so that it can
915 * go out of scope quietly
917 if (SvPADMY(sv) && !SvFAKE(sv))
920 if (SvTHINKFIRST(sv))
921 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
925 switch (SvTYPE(sv)) {
935 Perl_croak(aTHX_ "panic: leave_scope pad code");
940 SvPADSTALE_on(sv); /* mark as no longer live */
942 else { /* Someone has a claim on this, so abandon it. */
943 U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
944 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
945 case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
946 case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
947 default: *(SV**)ptr = NEWSV(0,0); break;
949 SvREFCNT_dec(sv); /* Cast current value to the winds. */
950 /* preserve pad nature, but also mark as not live
951 * for any closure capturing */
952 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
959 (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
963 case SAVEt_DESTRUCTOR:
967 case SAVEt_DESTRUCTOR_X:
969 (*SSPOPDXPTR)(aTHX_ ptr);
971 case SAVEt_REGCONTEXT:
974 PL_savestack_ix -= i; /* regexp must have croaked */
976 case SAVEt_STACK_POS: /* Position on Perl stack */
978 PL_stack_sp = PL_stack_base + i;
980 case SAVEt_AELEM: /* array element */
981 value = (SV*)SSPOPPTR;
984 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
986 ptr = av_fetch(av,i,1);
989 if (sv && sv != &PL_sv_undef) {
990 if (SvTIED_mg((SV*)av, PERL_MAGIC_tied))
991 (void)SvREFCNT_inc(sv);
998 case SAVEt_HELEM: /* hash element */
999 value = (SV*)SSPOPPTR;
1002 ptr = hv_fetch_ent(hv, sv, 1, 0);
1004 SV *oval = HeVAL((HE*)ptr);
1005 if (oval && oval != &PL_sv_undef) {
1006 ptr = &HeVAL((HE*)ptr);
1007 if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
1008 (void)SvREFCNT_inc(*(SV**)ptr);
1010 av = (AV*)hv; /* what to refcnt_dec */
1016 SvREFCNT_dec(value);
1019 PL_op = (OP*)SSPOPPTR;
1022 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
1023 SvREFCNT_dec((SV*)GvHV(PL_hintgv));
1024 GvHV(PL_hintgv) = NULL;
1026 *(I32*)&PL_hints = (I32)SSPOPINT;
1027 if (PL_hints & HINT_LOCALIZE_HH) {
1028 SvREFCNT_dec((SV*)GvHV(PL_hintgv));
1029 GvHV(PL_hintgv) = (HV*)SSPOPPTR;
1034 PL_comppad = (PAD*)SSPOPPTR;
1036 PL_curpad = AvARRAY(PL_comppad);
1038 PL_curpad = Null(SV**);
1042 PADOFFSET off = (PADOFFSET)SSPOPLONG;
1045 AvARRAY((PAD*)ptr)[off] = (SV*)SSPOPPTR;
1048 case SAVEt_SAVESWITCHSTACK:
1051 AV* t = (AV*)SSPOPPTR;
1052 AV* f = (AV*)SSPOPPTR;
1054 PL_curstackinfo->si_stack = f;
1057 case SAVEt_SET_SVFLAGS:
1059 U32 val = (U32)SSPOPINT;
1060 U32 mask = (U32)SSPOPINT;
1062 SvFLAGS(sv) &= ~mask;
1067 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1073 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1076 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1077 if (CxTYPE(cx) != CXt_SUBST) {
1078 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1079 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1080 PTR2UV(cx->blk_oldcop));
1081 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1082 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1083 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1084 PTR2UV(cx->blk_oldpm));
1085 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1087 switch (CxTYPE(cx)) {
1092 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1093 PTR2UV(cx->blk_sub.cv));
1094 PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%"UVxf"\n",
1095 PTR2UV(cx->blk_sub.gv));
1096 PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%"UVxf"\n",
1097 PTR2UV(cx->blk_sub.dfoutgv));
1098 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1099 (int)cx->blk_sub.hasargs);
1100 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1101 PTR2UV(cx->blk_sub.retop));
1104 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1105 PTR2UV(cx->blk_sub.cv));
1106 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1107 (long)cx->blk_sub.olddepth);
1108 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1109 (int)cx->blk_sub.hasargs);
1110 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n",
1111 (int)cx->blk_sub.lval);
1112 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1113 PTR2UV(cx->blk_sub.retop));
1116 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1117 (long)cx->blk_eval.old_in_eval);
1118 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1119 PL_op_name[cx->blk_eval.old_op_type],
1120 PL_op_desc[cx->blk_eval.old_op_type]);
1121 if (cx->blk_eval.old_namesv)
1122 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1123 SvPVX(cx->blk_eval.old_namesv));
1124 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1125 PTR2UV(cx->blk_eval.old_eval_root));
1126 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1127 PTR2UV(cx->blk_eval.retop));
1131 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
1132 cx->blk_loop.label);
1133 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1134 (long)cx->blk_loop.resetsp);
1135 PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%"UVxf"\n",
1136 PTR2UV(cx->blk_loop.redo_op));
1137 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1138 PTR2UV(cx->blk_loop.next_op));
1139 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%"UVxf"\n",
1140 PTR2UV(cx->blk_loop.last_op));
1141 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1142 (long)cx->blk_loop.iterix);
1143 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1144 PTR2UV(cx->blk_loop.iterary));
1145 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1146 PTR2UV(CxITERVAR(cx)));
1148 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%"UVxf"\n",
1149 PTR2UV(cx->blk_loop.itersave));
1150 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%"UVxf"\n",
1151 PTR2UV(cx->blk_loop.iterlval));
1155 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1156 (long)cx->sb_iters);
1157 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1158 (long)cx->sb_maxiters);
1159 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1160 (long)cx->sb_rflags);
1161 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1163 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1165 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1166 PTR2UV(cx->sb_dstr));
1167 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1168 PTR2UV(cx->sb_targ));
1169 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1171 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1173 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1174 PTR2UV(cx->sb_strend));
1175 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1176 PTR2UV(cx->sb_rxres));
1179 #endif /* DEBUGGING */