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;
285 SSPUSHINT(SvFAKE(gv));
287 SSPUSHPTR(SvREFCNT_inc(gv));
290 /* Don't let the localized GV coerce into non-glob, otherwise we would
291 * not be able to restore GP upon leave from context if that happened */
295 GP *gp = Perl_newGP(aTHX_ gv);
298 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
299 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
301 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
303 #ifdef PERL_DONT_CREATE_GVSV
304 if (gv == PL_errgv) {
305 /* We could scatter this logic everywhere by changing the
306 definition of ERRSV from GvSV() to GvSVn(), but it seems more
307 efficient to do this check once here. */
308 gp->gp_sv = newSV(0);
320 Perl_save_ary(pTHX_ GV *gv)
323 AV * const oav = GvAVn(gv);
326 PERL_ARGS_ASSERT_SAVE_ARY;
328 if (!AvREAL(oav) && AvREIFY(oav))
330 save_pushptrptr(gv, oav, SAVEt_AV);
335 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
340 Perl_save_hash(pTHX_ GV *gv)
345 PERL_ARGS_ASSERT_SAVE_HASH;
347 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
352 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
357 Perl_save_item(pTHX_ register SV *item)
360 register SV * const sv = newSVsv(item);
362 PERL_ARGS_ASSERT_SAVE_ITEM;
364 save_pushptrptr(item, /* remember the pointer */
365 sv, /* remember the value */
370 Perl_save_bool(pTHX_ bool *boolp)
374 PERL_ARGS_ASSERT_SAVE_BOOL;
379 SSPUSHINT(SAVEt_BOOL);
383 Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
393 Perl_save_int(pTHX_ int *intp)
397 PERL_ARGS_ASSERT_SAVE_INT;
399 save_pushi32ptr(*intp, intp, SAVEt_INT);
403 Perl_save_I8(pTHX_ I8 *bytep)
407 PERL_ARGS_ASSERT_SAVE_I8;
409 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
413 Perl_save_I16(pTHX_ I16 *intp)
417 PERL_ARGS_ASSERT_SAVE_I16;
419 save_pushi32ptr(*intp, intp, SAVEt_I16);
423 Perl_save_I32(pTHX_ I32 *intp)
427 PERL_ARGS_ASSERT_SAVE_I32;
429 save_pushi32ptr(*intp, intp, SAVEt_I32);
432 /* Cannot use save_sptr() to store a char* since the SV** cast will
433 * force word-alignment and we'll miss the pointer.
436 Perl_save_pptr(pTHX_ char **pptr)
440 PERL_ARGS_ASSERT_SAVE_PPTR;
442 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
446 Perl_save_vptr(pTHX_ void *ptr)
450 PERL_ARGS_ASSERT_SAVE_VPTR;
452 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
456 Perl_save_sptr(pTHX_ SV **sptr)
460 PERL_ARGS_ASSERT_SAVE_SPTR;
462 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
466 Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
470 ASSERT_CURPAD_ACTIVE("save_padsv");
471 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
472 SSPUSHPTR(PL_comppad);
473 SSPUSHLONG((long)off);
474 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
478 Perl_save_hptr(pTHX_ HV **hptr)
482 PERL_ARGS_ASSERT_SAVE_HPTR;
484 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
488 Perl_save_aptr(pTHX_ AV **aptr)
492 PERL_ARGS_ASSERT_SAVE_APTR;
494 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
498 Perl_save_pushptr(pTHX_ void *const ptr, const int type)
507 Perl_save_clearsv(pTHX_ SV **svp)
511 PERL_ARGS_ASSERT_SAVE_CLEARSV;
513 ASSERT_CURPAD_ACTIVE("save_clearsv");
515 SSPUSHLONG((long)(svp-PL_curpad));
516 SSPUSHINT(SAVEt_CLEARSV);
517 SvPADSTALE_off(*svp); /* mark lexical as active */
521 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
525 PERL_ARGS_ASSERT_SAVE_DELETE;
527 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
531 Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
537 PERL_ARGS_ASSERT_SAVE_HDELETE;
539 key = SvPV_const(keysv, len);
540 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
541 SvREFCNT_inc_simple_void_NN(hv);
542 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
546 Perl_save_adelete(pTHX_ AV *av, I32 key)
550 PERL_ARGS_ASSERT_SAVE_ADELETE;
552 SvREFCNT_inc_void(av);
553 save_pushi32ptr(key, av, SAVEt_ADELETE);
557 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
561 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
566 SSPUSHINT(SAVEt_DESTRUCTOR);
570 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
576 SSPUSHINT(SAVEt_DESTRUCTOR_X);
580 Perl_save_hints(pTHX)
583 if (PL_compiling.cop_hints_hash) {
585 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
588 if (PL_hints & HINT_LOCALIZE_HH) {
589 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
590 PL_compiling.cop_hints_hash, SAVEt_HINTS);
591 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
593 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
598 S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
609 Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
614 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
617 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
619 /* if it gets reified later, the restore will have the wrong refcnt */
620 if (!AvREAL(av) && AvREIFY(av))
621 SvREFCNT_inc_void(*sptr);
622 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
623 if (flags & SAVEf_KEEPOLDELEM)
626 /* If we're localizing a tied array element, this new sv
627 * won't actually be stored in the array - so it won't get
628 * reaped when the localize ends. Ensure it gets reaped by
629 * mortifying it instead. DAPM */
630 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
635 Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
640 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
644 SSPUSHPTR(SvREFCNT_inc_simple(hv));
645 SSPUSHPTR(newSVsv(key));
646 SSPUSHPTR(SvREFCNT_inc(*sptr));
647 SSPUSHINT(SAVEt_HELEM);
648 save_scalar_at(sptr, flags);
649 if (flags & SAVEf_KEEPOLDELEM)
652 /* If we're localizing a tied hash element, this new sv
653 * won't actually be stored in the hash - so it won't get
654 * reaped when the localize ends. Ensure it gets reaped by
655 * mortifying it instead. DAPM */
656 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
661 Perl_save_svref(pTHX_ SV **sptr)
665 PERL_ARGS_ASSERT_SAVE_SVREF;
668 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
669 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
673 Perl_save_alloc(pTHX_ I32 size, I32 pad)
676 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
677 - (char*)PL_savestack);
678 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
682 PL_savestack_ix += elems;
684 SSPUSHINT(SAVEt_ALLOC);
689 Perl_leave_scope(pTHX_ I32 base)
700 /* Localise the effects of the TAINT_NOT inside the loop. */
701 const bool was = PL_tainted;
704 Perl_croak(aTHX_ "panic: corrupt saved stack index");
705 DEBUG_l(Perl_deb(aTHX_ "savestack: releasing items %ld -> %ld\n",
706 (long)PL_savestack_ix, (long)base));
707 while (PL_savestack_ix > base) {
711 case SAVEt_ITEM: /* normal string */
712 value = MUTABLE_SV(SSPOPPTR);
713 sv = MUTABLE_SV(SSPOPPTR);
714 sv_replace(sv,value);
719 case SAVEt_SV: /* scalar reference */
720 value = MUTABLE_SV(SSPOPPTR);
721 gv = MUTABLE_GV(SSPOPPTR);
723 av = MUTABLE_AV(gv); /* what to refcnt_dec */
732 if (av) /* actually an av, hv or gv */
735 case SAVEt_GENERIC_PVREF: /* generic pv */
737 str = (char*)SSPOPPTR;
738 if (*(char**)ptr != str) {
739 Safefree(*(char**)ptr);
743 case SAVEt_SHARED_PVREF: /* shared pv */
744 str = (char*)SSPOPPTR;
746 if (*(char**)ptr != str) {
748 PerlMem_free(*(char**)ptr);
750 PerlMemShared_free(*(char**)ptr);
755 case SAVEt_GENERIC_SVREF: /* generic sv */
756 value = MUTABLE_SV(SSPOPPTR);
763 case SAVEt_AV: /* array reference */
764 av = MUTABLE_AV(SSPOPPTR);
765 gv = MUTABLE_GV(SSPOPPTR);
766 SvREFCNT_dec(GvAV(gv));
770 SvSETMAGIC(MUTABLE_SV(av));
774 case SAVEt_HV: /* hash reference */
775 hv = MUTABLE_HV(SSPOPPTR);
776 gv = MUTABLE_GV(SSPOPPTR);
777 SvREFCNT_dec(GvHV(gv));
781 SvSETMAGIC(MUTABLE_SV(hv));
785 case SAVEt_INT: /* int reference */
787 *(int*)ptr = (int)SSPOPINT;
789 case SAVEt_BOOL: /* bool reference */
791 *(bool*)ptr = cBOOL(SSPOPBOOL);
793 case SAVEt_I32: /* I32 reference */
795 #ifdef PERL_DEBUG_READONLY_OPS
797 const I32 val = SSPOPINT;
798 if (*(I32*)ptr != val)
802 *(I32*)ptr = (I32)SSPOPINT;
805 case SAVEt_SPTR: /* SV* reference */
807 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
809 case SAVEt_VPTR: /* random* reference */
810 case SAVEt_PPTR: /* char* reference */
812 *(char**)ptr = (char*)SSPOPPTR;
814 case SAVEt_HPTR: /* HV* reference */
816 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
818 case SAVEt_APTR: /* AV* reference */
820 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
822 case SAVEt_GP: /* scalar reference */
823 gv = MUTABLE_GV(SSPOPPTR);
825 GvGP(gv) = (GP*)SSPOPPTR;
828 /* putting a method back into circulation ("local")*/
829 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
830 mro_method_changed_in(hv);
835 SvREFCNT_dec(MUTABLE_SV(ptr));
837 case SAVEt_MORTALIZESV:
839 sv_2mortal(MUTABLE_SV(ptr));
843 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
851 ptr = (void*)&PL_curpad[SSPOPLONG];
854 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
855 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
856 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
857 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
858 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
861 /* Can clear pad variable in place? */
862 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
864 * if a my variable that was made readonly is going out of
865 * scope, we want to remove the readonlyness so that it can
866 * go out of scope quietly
868 if (SvPADMY(sv) && !SvFAKE(sv))
871 if (SvTHINKFIRST(sv))
872 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
876 switch (SvTYPE(sv)) {
880 av_clear(MUTABLE_AV(sv));
883 hv_clear(MUTABLE_HV(sv));
886 Perl_croak(aTHX_ "panic: leave_scope pad code");
891 SvPADSTALE_on(sv); /* mark as no longer live */
893 else { /* Someone has a claim on this, so abandon it. */
894 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
895 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
896 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
897 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
898 default: *(SV**)ptr = newSV(0); break;
900 SvREFCNT_dec(sv); /* Cast current value to the winds. */
901 /* preserve pad nature, but also mark as not live
902 * for any closure capturing */
903 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
908 hv = MUTABLE_HV(ptr);
911 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
917 av = MUTABLE_AV(ptr);
919 (void)av_delete(av, i, G_DISCARD);
922 case SAVEt_DESTRUCTOR_X:
924 (*SSPOPDXPTR)(aTHX_ ptr);
926 case SAVEt_REGCONTEXT:
929 PL_savestack_ix -= i; /* regexp must have croaked */
931 case SAVEt_STACK_POS: /* Position on Perl stack */
933 PL_stack_sp = PL_stack_base + i;
935 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
937 cxstack[i].blk_oldsp = SSPOPINT;
939 case SAVEt_AELEM: /* array element */
940 value = MUTABLE_SV(SSPOPPTR);
942 av = MUTABLE_AV(SSPOPPTR);
943 ptr = av_fetch(av,i,1);
944 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
948 if (sv && sv != &PL_sv_undef) {
949 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
950 SvREFCNT_inc_void_NN(sv);
957 case SAVEt_HELEM: /* hash element */
958 value = MUTABLE_SV(SSPOPPTR);
959 sv = MUTABLE_SV(SSPOPPTR);
960 hv = MUTABLE_HV(SSPOPPTR);
961 ptr = hv_fetch_ent(hv, sv, 1, 0);
964 const SV * const oval = HeVAL((HE*)ptr);
965 if (oval && oval != &PL_sv_undef) {
966 ptr = &HeVAL((HE*)ptr);
967 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
968 SvREFCNT_inc_void(*(SV**)ptr);
969 av = MUTABLE_AV(hv); /* what to refcnt_dec */
977 PL_op = (OP*)SSPOPPTR;
980 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
981 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
982 GvHV(PL_hintgv) = NULL;
984 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
985 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
986 *(I32*)&PL_hints = (I32)SSPOPINT;
987 if (PL_hints & HINT_LOCALIZE_HH) {
988 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
989 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
990 assert(GvHV(PL_hintgv));
991 } else if (!GvHV(PL_hintgv)) {
992 /* Need to add a new one manually, else gv_fetchpv() can
993 add one in this code:
995 if (SvTYPE(gv) == SVt_PVGV) {
998 gv_init_sv(gv, sv_type);
999 if (*name=='!' && sv_type == SVt_PVHV && len==1)
1005 and it won't have the magic set. */
1007 HV *const hv = newHV();
1008 hv_magic(hv, NULL, PERL_MAGIC_hints);
1009 GvHV(PL_hintgv) = hv;
1011 assert(GvHV(PL_hintgv));
1014 PL_comppad = (PAD*)SSPOPPTR;
1016 PL_curpad = AvARRAY(PL_comppad);
1020 case SAVEt_PADSV_AND_MORTALIZE:
1022 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
1026 svp = AvARRAY((PAD*)ptr) + off;
1027 /* This mortalizing used to be done by POPLOOP() via itersave.
1028 But as we have all the information here, we can do it here,
1029 save even having to have itersave in the struct. */
1031 *svp = MUTABLE_SV(SSPOPPTR);
1034 case SAVEt_SAVESWITCHSTACK:
1037 AV *const t = MUTABLE_AV(SSPOPPTR);
1038 AV *const f = MUTABLE_AV(SSPOPPTR);
1040 PL_curstackinfo->si_stack = f;
1043 case SAVEt_SET_SVFLAGS:
1045 const U32 val = (U32)SSPOPINT;
1046 const U32 mask = (U32)SSPOPINT;
1047 sv = MUTABLE_SV(SSPOPPTR);
1048 SvFLAGS(sv) &= ~mask;
1053 /* This would be a mathom, but Perl_save_svref() calls a static
1054 function, S_save_scalar_at(), so has to stay in this file. */
1055 case SAVEt_SVREF: /* scalar reference */
1056 value = MUTABLE_SV(SSPOPPTR);
1058 av = NULL; /* what to refcnt_dec */
1061 /* These are only saved in mathoms.c */
1063 gv = MUTABLE_GV(SSPOPPTR);
1064 (void)sv_clear(MUTABLE_SV(gv));
1066 case SAVEt_LONG: /* long reference */
1068 *(long*)ptr = (long)SSPOPLONG;
1070 case SAVEt_IV: /* IV reference */
1072 *(IV*)ptr = (IV)SSPOPIV;
1075 case SAVEt_I16: /* I16 reference */
1077 *(I16*)ptr = (I16)SSPOPINT;
1079 case SAVEt_I8: /* I8 reference */
1081 *(I8*)ptr = (I8)SSPOPINT;
1083 case SAVEt_DESTRUCTOR:
1087 case SAVEt_COP_ARYBASE:
1090 CopARYBASE_set((COP *)ptr, i);
1092 case SAVEt_COMPILE_WARNINGS:
1095 if (!specialWARN(PL_compiling.cop_warnings))
1096 PerlMemShared_free(PL_compiling.cop_warnings);
1098 PL_compiling.cop_warnings = (STRLEN*)ptr;
1100 case SAVEt_RE_STATE:
1102 const struct re_save_state *const state
1103 = (struct re_save_state *)
1104 (PL_savestack + PL_savestack_ix
1105 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1106 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1108 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1109 Safefree(PL_reg_start_tmp);
1111 if (PL_reg_poscache != state->re_state_reg_poscache) {
1112 Safefree(PL_reg_poscache);
1114 Copy(state, &PL_reg_state, 1, struct re_save_state);
1119 parser_free((yy_parser *) ptr);
1122 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1132 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1136 PERL_ARGS_ASSERT_CX_DUMP;
1139 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1140 if (CxTYPE(cx) != CXt_SUBST) {
1141 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1142 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1143 PTR2UV(cx->blk_oldcop));
1144 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1145 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1146 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1147 PTR2UV(cx->blk_oldpm));
1148 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1150 switch (CxTYPE(cx)) {
1155 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1156 PTR2UV(cx->blk_format.cv));
1157 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1158 PTR2UV(cx->blk_format.gv));
1159 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1160 PTR2UV(cx->blk_format.dfoutgv));
1161 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
1162 (int)CxHASARGS(cx));
1163 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1164 PTR2UV(cx->blk_format.retop));
1167 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1168 PTR2UV(cx->blk_sub.cv));
1169 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1170 (long)cx->blk_sub.olddepth);
1171 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1172 (int)CxHASARGS(cx));
1173 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
1174 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1175 PTR2UV(cx->blk_sub.retop));
1178 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1179 (long)CxOLD_IN_EVAL(cx));
1180 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1181 PL_op_name[CxOLD_OP_TYPE(cx)],
1182 PL_op_desc[CxOLD_OP_TYPE(cx)]);
1183 if (cx->blk_eval.old_namesv)
1184 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1185 SvPVX_const(cx->blk_eval.old_namesv));
1186 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1187 PTR2UV(cx->blk_eval.old_eval_root));
1188 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1189 PTR2UV(cx->blk_eval.retop));
1192 case CXt_LOOP_LAZYIV:
1193 case CXt_LOOP_LAZYSV:
1195 case CXt_LOOP_PLAIN:
1196 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
1197 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1198 (long)cx->blk_loop.resetsp);
1199 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1200 PTR2UV(cx->blk_loop.my_op));
1201 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1202 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
1203 /* XXX: not accurate for LAZYSV/IV */
1204 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1205 PTR2UV(cx->blk_loop.state_u.ary.ary));
1206 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1207 (long)cx->blk_loop.state_u.ary.ix);
1208 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1209 PTR2UV(CxITERVAR(cx)));
1213 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1214 (long)cx->sb_iters);
1215 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1216 (long)cx->sb_maxiters);
1217 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1218 (long)cx->sb_rflags);
1219 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1221 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1223 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1224 PTR2UV(cx->sb_dstr));
1225 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1226 PTR2UV(cx->sb_targ));
1227 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1229 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1231 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1232 PTR2UV(cx->sb_strend));
1233 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1234 PTR2UV(cx->sb_rxres));
1238 PERL_UNUSED_CONTEXT;
1239 PERL_UNUSED_ARG(cx);
1240 #endif /* DEBUGGING */
1245 * c-indentation-style: bsd
1247 * indent-tabs-mode: t
1250 * ex: set ts=8 sts=4 sw=4 noet: