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 * For the fashion of Minas Tirith was such that it was built on seven
15 * [p.751 of _The Lord of the Rings_, V/i: "Minas Tirith"]
18 /* This file contains functions to manipulate several of Perl's stacks;
19 * in particular it contains code to push various types of things onto
20 * the savestack, then to pop them off and perform the correct restorative
21 * action for each one. This corresponds to the cleanup Perl does at
26 #define PERL_IN_SCOPE_C
30 Perl_stack_grow(pTHX_ SV **sp, SV **p, int n)
34 PERL_ARGS_ASSERT_STACK_GROW;
37 #ifndef STRESS_REALLOC
38 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
40 av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
45 #ifndef STRESS_REALLOC
46 #define GROW(old) ((old) * 3 / 2)
48 #define GROW(old) ((old) + 1)
52 Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
57 si->si_stack = newAV();
58 AvREAL_off(si->si_stack);
59 av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
60 AvALLOC(si->si_stack)[0] = &PL_sv_undef;
61 AvFILLp(si->si_stack) = 0;
64 si->si_cxmax = cxitems - 1;
66 si->si_type = PERLSI_UNDEF;
67 Newx(si->si_cxstack, cxitems, PERL_CONTEXT);
68 /* Without any kind of initialising PUSHSUBST()
69 * in pp_subst() will read uninitialised heap. */
70 PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT);
78 const IV old_max = cxstack_max;
79 cxstack_max = GROW(cxstack_max);
80 Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
81 /* Without any kind of initialising deep enough recursion
82 * will end up reading uninitialised PERL_CONTEXTs. */
83 PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
84 return cxstack_ix + 1;
91 if (PL_scopestack_ix == PL_scopestack_max) {
92 PL_scopestack_max = GROW(PL_scopestack_max);
93 Renew(PL_scopestack, PL_scopestack_max, I32);
95 Renew(PL_scopestack_name, PL_scopestack_max, const char*);
99 PL_scopestack_name[PL_scopestack_ix] = "unknown";
101 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
109 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
110 LEAVE_SCOPE(oldsave);
114 Perl_markstack_grow(pTHX)
117 const I32 oldmax = PL_markstack_max - PL_markstack;
118 const I32 newmax = GROW(oldmax);
120 Renew(PL_markstack, newmax, I32);
121 PL_markstack_ptr = PL_markstack + oldmax;
122 PL_markstack_max = PL_markstack + newmax;
126 Perl_savestack_grow(pTHX)
129 PL_savestack_max = GROW(PL_savestack_max) + 4;
130 Renew(PL_savestack, PL_savestack_max, ANY);
134 Perl_savestack_grow_cnt(pTHX_ I32 need)
137 PL_savestack_max = PL_savestack_ix + need;
138 Renew(PL_savestack, PL_savestack_max, ANY);
144 Perl_tmps_grow(pTHX_ I32 n)
147 #ifndef STRESS_REALLOC
149 n = (PL_tmps_max < 512) ? 128 : 512;
151 PL_tmps_max = PL_tmps_ix + n + 1;
152 Renew(PL_tmps_stack, PL_tmps_max, SV*);
160 /* XXX should tmps_floor live in cxstack? */
161 const I32 myfloor = PL_tmps_floor;
162 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
163 SV* const sv = PL_tmps_stack[PL_tmps_ix];
164 PL_tmps_stack[PL_tmps_ix--] = NULL;
165 if (sv && sv != &PL_sv_undef) {
167 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
173 S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
179 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
182 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
184 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
185 if (SvGMAGICAL(osv)) {
186 const bool oldtainted = PL_tainted;
187 SvFLAGS(osv) |= (SvFLAGS(osv) &
188 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
189 PL_tainted = oldtainted;
191 if (!(flags & SAVEf_KEEPOLDELEM))
192 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
199 Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
209 Perl_save_scalar(pTHX_ GV *gv)
212 SV ** const sptr = &GvSVn(gv);
214 PERL_ARGS_ASSERT_SAVE_SCALAR;
219 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
220 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
223 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
224 * restore a global SV to its prior contents, freeing new value. */
226 Perl_save_generic_svref(pTHX_ SV **sptr)
230 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
232 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
235 /* Like save_pptr(), but also Safefree()s the new value if it is different
236 * from the old one. Can be used to restore a global char* to its prior
237 * contents, freeing new value. */
239 Perl_save_generic_pvref(pTHX_ char **str)
243 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
245 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
248 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
249 * Can be used to restore a shared global char* to its prior
250 * contents, freeing new value. */
252 Perl_save_shared_pvref(pTHX_ char **str)
256 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
258 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
261 /* set the SvFLAGS specified by mask to the values in val */
264 Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
268 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
274 SSPUSHINT(SAVEt_SET_SVFLAGS);
278 Perl_save_gp(pTHX_ GV *gv, I32 empty)
282 PERL_ARGS_ASSERT_SAVE_GP;
284 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
287 GP *gp = Perl_newGP(aTHX_ gv);
290 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
291 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
293 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
295 #ifdef PERL_DONT_CREATE_GVSV
296 if (gv == PL_errgv) {
297 /* We could scatter this logic everywhere by changing the
298 definition of ERRSV from GvSV() to GvSVn(), but it seems more
299 efficient to do this check once here. */
300 gp->gp_sv = newSV(0);
312 Perl_save_ary(pTHX_ GV *gv)
315 AV * const oav = GvAVn(gv);
318 PERL_ARGS_ASSERT_SAVE_ARY;
320 if (!AvREAL(oav) && AvREIFY(oav))
322 save_pushptrptr(gv, oav, SAVEt_AV);
327 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
332 Perl_save_hash(pTHX_ GV *gv)
337 PERL_ARGS_ASSERT_SAVE_HASH;
339 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
344 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
349 Perl_save_item(pTHX_ register SV *item)
352 register SV * const sv = newSVsv(item);
354 PERL_ARGS_ASSERT_SAVE_ITEM;
356 save_pushptrptr(item, /* remember the pointer */
357 sv, /* remember the value */
362 Perl_save_bool(pTHX_ bool *boolp)
366 PERL_ARGS_ASSERT_SAVE_BOOL;
371 SSPUSHINT(SAVEt_BOOL);
375 Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
385 Perl_save_int(pTHX_ int *intp)
389 PERL_ARGS_ASSERT_SAVE_INT;
391 save_pushi32ptr(*intp, intp, SAVEt_INT);
395 Perl_save_I8(pTHX_ I8 *bytep)
399 PERL_ARGS_ASSERT_SAVE_I8;
401 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
405 Perl_save_I16(pTHX_ I16 *intp)
409 PERL_ARGS_ASSERT_SAVE_I16;
411 save_pushi32ptr(*intp, intp, SAVEt_I16);
415 Perl_save_I32(pTHX_ I32 *intp)
419 PERL_ARGS_ASSERT_SAVE_I32;
421 save_pushi32ptr(*intp, intp, SAVEt_I32);
424 /* Cannot use save_sptr() to store a char* since the SV** cast will
425 * force word-alignment and we'll miss the pointer.
428 Perl_save_pptr(pTHX_ char **pptr)
432 PERL_ARGS_ASSERT_SAVE_PPTR;
434 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
438 Perl_save_vptr(pTHX_ void *ptr)
442 PERL_ARGS_ASSERT_SAVE_VPTR;
444 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
448 Perl_save_sptr(pTHX_ SV **sptr)
452 PERL_ARGS_ASSERT_SAVE_SPTR;
454 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
458 Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
462 ASSERT_CURPAD_ACTIVE("save_padsv");
463 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
464 SSPUSHPTR(PL_comppad);
465 SSPUSHLONG((long)off);
466 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
470 Perl_save_hptr(pTHX_ HV **hptr)
474 PERL_ARGS_ASSERT_SAVE_HPTR;
476 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
480 Perl_save_aptr(pTHX_ AV **aptr)
484 PERL_ARGS_ASSERT_SAVE_APTR;
486 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
490 Perl_save_pushptr(pTHX_ void *const ptr, const int type)
499 Perl_save_clearsv(pTHX_ SV **svp)
503 PERL_ARGS_ASSERT_SAVE_CLEARSV;
505 ASSERT_CURPAD_ACTIVE("save_clearsv");
507 SSPUSHLONG((long)(svp-PL_curpad));
508 SSPUSHINT(SAVEt_CLEARSV);
509 SvPADSTALE_off(*svp); /* mark lexical as active */
513 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
517 PERL_ARGS_ASSERT_SAVE_DELETE;
519 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
523 Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
529 PERL_ARGS_ASSERT_SAVE_HDELETE;
531 key = SvPV_const(keysv, len);
532 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
533 SvREFCNT_inc_simple_void_NN(hv);
534 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
538 Perl_save_adelete(pTHX_ AV *av, I32 key)
542 PERL_ARGS_ASSERT_SAVE_ADELETE;
544 SvREFCNT_inc_void(av);
545 save_pushi32ptr(key, av, SAVEt_ADELETE);
549 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
553 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
558 SSPUSHINT(SAVEt_DESTRUCTOR);
562 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
568 SSPUSHINT(SAVEt_DESTRUCTOR_X);
572 Perl_save_hints(pTHX)
575 if (PL_compiling.cop_hints_hash) {
577 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
580 if (PL_hints & HINT_LOCALIZE_HH) {
581 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
582 PL_compiling.cop_hints_hash, SAVEt_HINTS);
583 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
585 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
590 S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
601 Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
606 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
609 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
611 /* if it gets reified later, the restore will have the wrong refcnt */
612 if (!AvREAL(av) && AvREIFY(av))
613 SvREFCNT_inc_void(*sptr);
614 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
615 if (flags & SAVEf_KEEPOLDELEM)
618 /* If we're localizing a tied array element, this new sv
619 * won't actually be stored in the array - 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((const SV *)av, PERL_MAGIC_tied))
627 Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
632 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
636 SSPUSHPTR(SvREFCNT_inc_simple(hv));
637 SSPUSHPTR(newSVsv(key));
638 SSPUSHPTR(SvREFCNT_inc(*sptr));
639 SSPUSHINT(SAVEt_HELEM);
640 save_scalar_at(sptr, flags);
641 if (flags & SAVEf_KEEPOLDELEM)
644 /* If we're localizing a tied hash element, this new sv
645 * won't actually be stored in the hash - so it won't get
646 * reaped when the localize ends. Ensure it gets reaped by
647 * mortifying it instead. DAPM */
648 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
653 Perl_save_svref(pTHX_ SV **sptr)
657 PERL_ARGS_ASSERT_SAVE_SVREF;
660 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
661 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
665 Perl_save_alloc(pTHX_ I32 size, I32 pad)
668 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
669 - (char*)PL_savestack);
670 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
674 PL_savestack_ix += elems;
676 SSPUSHINT(SAVEt_ALLOC);
681 Perl_leave_scope(pTHX_ I32 base)
692 /* Localise the effects of the TAINT_NOT inside the loop. */
693 const bool was = PL_tainted;
696 Perl_croak(aTHX_ "panic: corrupt saved stack index");
697 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
698 (long)PL_savestack_ix, (long)base));
699 while (PL_savestack_ix > base) {
703 case SAVEt_ITEM: /* normal string */
704 value = MUTABLE_SV(SSPOPPTR);
705 sv = MUTABLE_SV(SSPOPPTR);
706 sv_replace(sv,value);
711 case SAVEt_SV: /* scalar reference */
712 value = MUTABLE_SV(SSPOPPTR);
713 gv = MUTABLE_GV(SSPOPPTR);
715 av = MUTABLE_AV(gv); /* what to refcnt_dec */
724 if (av) /* actually an av, hv or gv */
727 case SAVEt_GENERIC_PVREF: /* generic pv */
729 str = (char*)SSPOPPTR;
730 if (*(char**)ptr != str) {
731 Safefree(*(char**)ptr);
735 case SAVEt_SHARED_PVREF: /* shared pv */
736 str = (char*)SSPOPPTR;
738 if (*(char**)ptr != str) {
740 PerlMem_free(*(char**)ptr);
742 PerlMemShared_free(*(char**)ptr);
747 case SAVEt_GENERIC_SVREF: /* generic sv */
748 value = MUTABLE_SV(SSPOPPTR);
755 case SAVEt_AV: /* array reference */
756 av = MUTABLE_AV(SSPOPPTR);
757 gv = MUTABLE_GV(SSPOPPTR);
758 SvREFCNT_dec(GvAV(gv));
762 SvSETMAGIC(MUTABLE_SV(av));
766 case SAVEt_HV: /* hash reference */
767 hv = MUTABLE_HV(SSPOPPTR);
768 gv = MUTABLE_GV(SSPOPPTR);
769 SvREFCNT_dec(GvHV(gv));
773 SvSETMAGIC(MUTABLE_SV(hv));
777 case SAVEt_INT: /* int reference */
779 *(int*)ptr = (int)SSPOPINT;
781 case SAVEt_BOOL: /* bool reference */
783 *(bool*)ptr = cBOOL(SSPOPBOOL);
785 case SAVEt_I32: /* I32 reference */
787 #ifdef PERL_DEBUG_READONLY_OPS
789 const I32 val = SSPOPINT;
790 if (*(I32*)ptr != val)
794 *(I32*)ptr = (I32)SSPOPINT;
797 case SAVEt_SPTR: /* SV* reference */
799 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
801 case SAVEt_VPTR: /* random* reference */
802 case SAVEt_PPTR: /* char* reference */
804 *(char**)ptr = (char*)SSPOPPTR;
806 case SAVEt_HPTR: /* HV* reference */
808 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
810 case SAVEt_APTR: /* AV* reference */
812 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
814 case SAVEt_GP: /* scalar reference */
816 gv = MUTABLE_GV(SSPOPPTR);
819 /* putting a method back into circulation ("local")*/
820 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
821 mro_method_changed_in(hv);
826 SvREFCNT_dec(MUTABLE_SV(ptr));
828 case SAVEt_MORTALIZESV:
830 sv_2mortal(MUTABLE_SV(ptr));
834 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
842 ptr = (void*)&PL_curpad[SSPOPLONG];
845 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
846 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
847 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
848 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
849 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
852 /* Can clear pad variable in place? */
853 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
855 * if a my variable that was made readonly is going out of
856 * scope, we want to remove the readonlyness so that it can
857 * go out of scope quietly
859 if (SvPADMY(sv) && !SvFAKE(sv))
862 if (SvTHINKFIRST(sv))
863 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
867 switch (SvTYPE(sv)) {
871 av_clear(MUTABLE_AV(sv));
874 hv_clear(MUTABLE_HV(sv));
877 Perl_croak(aTHX_ "panic: leave_scope pad code");
882 SvPADSTALE_on(sv); /* mark as no longer live */
884 else { /* Someone has a claim on this, so abandon it. */
885 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
886 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
887 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
888 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
889 default: *(SV**)ptr = newSV(0); break;
891 SvREFCNT_dec(sv); /* Cast current value to the winds. */
892 /* preserve pad nature, but also mark as not live
893 * for any closure capturing */
894 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
899 hv = MUTABLE_HV(ptr);
902 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
908 av = MUTABLE_AV(ptr);
910 (void)av_delete(av, i, G_DISCARD);
913 case SAVEt_DESTRUCTOR_X:
915 (*SSPOPDXPTR)(aTHX_ ptr);
917 case SAVEt_REGCONTEXT:
920 PL_savestack_ix -= i; /* regexp must have croaked */
922 case SAVEt_STACK_POS: /* Position on Perl stack */
924 PL_stack_sp = PL_stack_base + i;
926 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
928 cxstack[i].blk_oldsp = SSPOPINT;
930 case SAVEt_AELEM: /* array element */
931 value = MUTABLE_SV(SSPOPPTR);
933 av = MUTABLE_AV(SSPOPPTR);
934 ptr = av_fetch(av,i,1);
935 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
939 if (sv && sv != &PL_sv_undef) {
940 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
941 SvREFCNT_inc_void_NN(sv);
948 case SAVEt_HELEM: /* hash element */
949 value = MUTABLE_SV(SSPOPPTR);
950 sv = MUTABLE_SV(SSPOPPTR);
951 hv = MUTABLE_HV(SSPOPPTR);
952 ptr = hv_fetch_ent(hv, sv, 1, 0);
955 const SV * const oval = HeVAL((HE*)ptr);
956 if (oval && oval != &PL_sv_undef) {
957 ptr = &HeVAL((HE*)ptr);
958 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
959 SvREFCNT_inc_void(*(SV**)ptr);
960 av = MUTABLE_AV(hv); /* what to refcnt_dec */
968 PL_op = (OP*)SSPOPPTR;
971 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
972 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
973 GvHV(PL_hintgv) = NULL;
975 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
976 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
977 *(I32*)&PL_hints = (I32)SSPOPINT;
978 if (PL_hints & HINT_LOCALIZE_HH) {
979 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
980 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
981 assert(GvHV(PL_hintgv));
982 } else if (!GvHV(PL_hintgv)) {
983 /* Need to add a new one manually, else gv_fetchpv() can
984 add one in this code:
986 if (SvTYPE(gv) == SVt_PVGV) {
989 gv_init_sv(gv, sv_type);
990 if (*name=='!' && sv_type == SVt_PVHV && len==1)
996 and it won't have the magic set. */
998 HV *const hv = newHV();
999 hv_magic(hv, NULL, PERL_MAGIC_hints);
1000 GvHV(PL_hintgv) = hv;
1002 assert(GvHV(PL_hintgv));
1005 PL_comppad = (PAD*)SSPOPPTR;
1007 PL_curpad = AvARRAY(PL_comppad);
1011 case SAVEt_PADSV_AND_MORTALIZE:
1013 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
1017 svp = AvARRAY((PAD*)ptr) + off;
1018 /* This mortalizing used to be done by POPLOOP() via itersave.
1019 But as we have all the information here, we can do it here,
1020 save even having to have itersave in the struct. */
1022 *svp = MUTABLE_SV(SSPOPPTR);
1025 case SAVEt_SAVESWITCHSTACK:
1028 AV *const t = MUTABLE_AV(SSPOPPTR);
1029 AV *const f = MUTABLE_AV(SSPOPPTR);
1031 PL_curstackinfo->si_stack = f;
1034 case SAVEt_SET_SVFLAGS:
1036 const U32 val = (U32)SSPOPINT;
1037 const U32 mask = (U32)SSPOPINT;
1038 sv = MUTABLE_SV(SSPOPPTR);
1039 SvFLAGS(sv) &= ~mask;
1044 /* This would be a mathom, but Perl_save_svref() calls a static
1045 function, S_save_scalar_at(), so has to stay in this file. */
1046 case SAVEt_SVREF: /* scalar reference */
1047 value = MUTABLE_SV(SSPOPPTR);
1049 av = NULL; /* what to refcnt_dec */
1052 /* These are only saved in mathoms.c */
1054 gv = MUTABLE_GV(SSPOPPTR);
1055 (void)sv_clear(MUTABLE_SV(gv));
1057 case SAVEt_LONG: /* long reference */
1059 *(long*)ptr = (long)SSPOPLONG;
1061 case SAVEt_IV: /* IV reference */
1063 *(IV*)ptr = (IV)SSPOPIV;
1066 case SAVEt_I16: /* I16 reference */
1068 *(I16*)ptr = (I16)SSPOPINT;
1070 case SAVEt_I8: /* I8 reference */
1072 *(I8*)ptr = (I8)SSPOPINT;
1074 case SAVEt_DESTRUCTOR:
1078 case SAVEt_COP_ARYBASE:
1081 CopARYBASE_set((COP *)ptr, i);
1083 case SAVEt_COMPILE_WARNINGS:
1086 if (!specialWARN(PL_compiling.cop_warnings))
1087 PerlMemShared_free(PL_compiling.cop_warnings);
1089 PL_compiling.cop_warnings = (STRLEN*)ptr;
1091 case SAVEt_RE_STATE:
1093 const struct re_save_state *const state
1094 = (struct re_save_state *)
1095 (PL_savestack + PL_savestack_ix
1096 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1097 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1099 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1100 Safefree(PL_reg_start_tmp);
1102 if (PL_reg_poscache != state->re_state_reg_poscache) {
1103 Safefree(PL_reg_poscache);
1105 Copy(state, &PL_reg_state, 1, struct re_save_state);
1110 parser_free((yy_parser *) ptr);
1113 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1123 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1127 PERL_ARGS_ASSERT_CX_DUMP;
1130 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1131 if (CxTYPE(cx) != CXt_SUBST) {
1132 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1133 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1134 PTR2UV(cx->blk_oldcop));
1135 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1136 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1137 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1138 PTR2UV(cx->blk_oldpm));
1139 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1141 switch (CxTYPE(cx)) {
1146 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1147 PTR2UV(cx->blk_format.cv));
1148 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1149 PTR2UV(cx->blk_format.gv));
1150 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1151 PTR2UV(cx->blk_format.dfoutgv));
1152 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
1153 (int)CxHASARGS(cx));
1154 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1155 PTR2UV(cx->blk_format.retop));
1158 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1159 PTR2UV(cx->blk_sub.cv));
1160 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1161 (long)cx->blk_sub.olddepth);
1162 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1163 (int)CxHASARGS(cx));
1164 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
1165 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1166 PTR2UV(cx->blk_sub.retop));
1169 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1170 (long)CxOLD_IN_EVAL(cx));
1171 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1172 PL_op_name[CxOLD_OP_TYPE(cx)],
1173 PL_op_desc[CxOLD_OP_TYPE(cx)]);
1174 if (cx->blk_eval.old_namesv)
1175 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1176 SvPVX_const(cx->blk_eval.old_namesv));
1177 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1178 PTR2UV(cx->blk_eval.old_eval_root));
1179 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1180 PTR2UV(cx->blk_eval.retop));
1183 case CXt_LOOP_LAZYIV:
1184 case CXt_LOOP_LAZYSV:
1186 case CXt_LOOP_PLAIN:
1187 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
1188 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1189 (long)cx->blk_loop.resetsp);
1190 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1191 PTR2UV(cx->blk_loop.my_op));
1192 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1193 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
1194 /* XXX: not accurate for LAZYSV/IV */
1195 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1196 PTR2UV(cx->blk_loop.state_u.ary.ary));
1197 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1198 (long)cx->blk_loop.state_u.ary.ix);
1199 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1200 PTR2UV(CxITERVAR(cx)));
1204 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1205 (long)cx->sb_iters);
1206 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1207 (long)cx->sb_maxiters);
1208 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1209 (long)cx->sb_rflags);
1210 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1212 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1214 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1215 PTR2UV(cx->sb_dstr));
1216 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1217 PTR2UV(cx->sb_targ));
1218 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1220 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1222 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1223 PTR2UV(cx->sb_strend));
1224 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1225 PTR2UV(cx->sb_rxres));
1229 PERL_UNUSED_CONTEXT;
1230 PERL_UNUSED_ARG(cx);
1231 #endif /* DEBUGGING */
1236 * c-indentation-style: bsd
1238 * indent-tabs-mode: t
1241 * ex: set ts=8 sts=4 sw=4 noet: