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 PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
103 const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
104 LEAVE_SCOPE(oldsave);
108 Perl_markstack_grow(pTHX)
111 const I32 oldmax = PL_markstack_max - PL_markstack;
112 const I32 newmax = GROW(oldmax);
114 Renew(PL_markstack, newmax, I32);
115 PL_markstack_ptr = PL_markstack + oldmax;
116 PL_markstack_max = PL_markstack + newmax;
120 Perl_savestack_grow(pTHX)
123 PL_savestack_max = GROW(PL_savestack_max) + 4;
124 Renew(PL_savestack, PL_savestack_max, ANY);
128 Perl_savestack_grow_cnt(pTHX_ I32 need)
131 PL_savestack_max = PL_savestack_ix + need;
132 Renew(PL_savestack, PL_savestack_max, ANY);
138 Perl_tmps_grow(pTHX_ I32 n)
141 #ifndef STRESS_REALLOC
143 n = (PL_tmps_max < 512) ? 128 : 512;
145 PL_tmps_max = PL_tmps_ix + n + 1;
146 Renew(PL_tmps_stack, PL_tmps_max, SV*);
154 /* XXX should tmps_floor live in cxstack? */
155 const I32 myfloor = PL_tmps_floor;
156 while (PL_tmps_ix > myfloor) { /* clean up after last statement */
157 SV* const sv = PL_tmps_stack[PL_tmps_ix];
158 PL_tmps_stack[PL_tmps_ix--] = NULL;
159 if (sv && sv != &PL_sv_undef) {
161 SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
167 S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
170 SV * const osv = *sptr;
171 register SV * const sv = *sptr = newSV(0);
173 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
175 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
176 if (SvGMAGICAL(osv)) {
177 const bool oldtainted = PL_tainted;
178 SvFLAGS(osv) |= (SvFLAGS(osv) &
179 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
180 PL_tainted = oldtainted;
182 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
188 Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
198 Perl_save_scalar(pTHX_ GV *gv)
201 SV ** const sptr = &GvSVn(gv);
203 PERL_ARGS_ASSERT_SAVE_SCALAR;
208 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
209 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
212 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
213 * restore a global SV to its prior contents, freeing new value. */
215 Perl_save_generic_svref(pTHX_ SV **sptr)
219 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
221 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
224 /* Like save_pptr(), but also Safefree()s the new value if it is different
225 * from the old one. Can be used to restore a global char* to its prior
226 * contents, freeing new value. */
228 Perl_save_generic_pvref(pTHX_ char **str)
232 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
234 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
237 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
238 * Can be used to restore a shared global char* to its prior
239 * contents, freeing new value. */
241 Perl_save_shared_pvref(pTHX_ char **str)
245 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
247 save_pushptrptr(str, *str, 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)
257 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
263 SSPUSHINT(SAVEt_SET_SVFLAGS);
267 Perl_save_gp(pTHX_ GV *gv, I32 empty)
271 PERL_ARGS_ASSERT_SAVE_GP;
273 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
276 GP *gp = Perl_newGP(aTHX_ gv);
279 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
280 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
282 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
284 #ifdef PERL_DONT_CREATE_GVSV
285 if (gv == PL_errgv) {
286 /* We could scatter this logic everywhere by changing the
287 definition of ERRSV from GvSV() to GvSVn(), but it seems more
288 efficient to do this check once here. */
289 gp->gp_sv = newSV(0);
301 Perl_save_ary(pTHX_ GV *gv)
304 AV * const oav = GvAVn(gv);
307 PERL_ARGS_ASSERT_SAVE_ARY;
309 if (!AvREAL(oav) && AvREIFY(oav))
311 save_pushptrptr(gv, oav, SAVEt_AV);
316 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
321 Perl_save_hash(pTHX_ GV *gv)
326 PERL_ARGS_ASSERT_SAVE_HASH;
328 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
333 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
338 Perl_save_item(pTHX_ register SV *item)
341 register SV * const sv = newSVsv(item);
343 PERL_ARGS_ASSERT_SAVE_ITEM;
345 save_pushptrptr(item, /* remember the pointer */
346 sv, /* remember the value */
351 Perl_save_bool(pTHX_ bool *boolp)
355 PERL_ARGS_ASSERT_SAVE_BOOL;
360 SSPUSHINT(SAVEt_BOOL);
364 Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
374 Perl_save_int(pTHX_ int *intp)
378 PERL_ARGS_ASSERT_SAVE_INT;
380 save_pushi32ptr(*intp, intp, SAVEt_INT);
384 Perl_save_I8(pTHX_ I8 *bytep)
388 PERL_ARGS_ASSERT_SAVE_I8;
390 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
394 Perl_save_I16(pTHX_ I16 *intp)
398 PERL_ARGS_ASSERT_SAVE_I16;
400 save_pushi32ptr(*intp, intp, SAVEt_I16);
404 Perl_save_I32(pTHX_ I32 *intp)
408 PERL_ARGS_ASSERT_SAVE_I32;
410 save_pushi32ptr(*intp, intp, SAVEt_I32);
413 /* Cannot use save_sptr() to store a char* since the SV** cast will
414 * force word-alignment and we'll miss the pointer.
417 Perl_save_pptr(pTHX_ char **pptr)
421 PERL_ARGS_ASSERT_SAVE_PPTR;
423 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
427 Perl_save_vptr(pTHX_ void *ptr)
431 PERL_ARGS_ASSERT_SAVE_VPTR;
433 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
437 Perl_save_sptr(pTHX_ SV **sptr)
441 PERL_ARGS_ASSERT_SAVE_SPTR;
443 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
447 Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
451 ASSERT_CURPAD_ACTIVE("save_padsv");
452 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
453 SSPUSHPTR(PL_comppad);
454 SSPUSHLONG((long)off);
455 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
459 Perl_save_hptr(pTHX_ HV **hptr)
463 PERL_ARGS_ASSERT_SAVE_HPTR;
465 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
469 Perl_save_aptr(pTHX_ AV **aptr)
473 PERL_ARGS_ASSERT_SAVE_APTR;
475 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
479 Perl_save_pushptr(pTHX_ void *const ptr, const int type)
488 Perl_save_clearsv(pTHX_ SV **svp)
492 PERL_ARGS_ASSERT_SAVE_CLEARSV;
494 ASSERT_CURPAD_ACTIVE("save_clearsv");
496 SSPUSHLONG((long)(svp-PL_curpad));
497 SSPUSHINT(SAVEt_CLEARSV);
498 SvPADSTALE_off(*svp); /* mark lexical as active */
502 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
506 PERL_ARGS_ASSERT_SAVE_DELETE;
511 SSPUSHPTR(SvREFCNT_inc_simple(hv));
512 SSPUSHINT(SAVEt_DELETE);
516 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
520 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
525 SSPUSHINT(SAVEt_DESTRUCTOR);
529 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
535 SSPUSHINT(SAVEt_DESTRUCTOR_X);
539 Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
544 PERL_ARGS_ASSERT_SAVE_AELEM;
548 SSPUSHPTR(SvREFCNT_inc_simple(av));
550 SSPUSHPTR(SvREFCNT_inc(*sptr));
551 SSPUSHINT(SAVEt_AELEM);
552 /* if it gets reified later, the restore will have the wrong refcnt */
553 if (!AvREAL(av) && AvREIFY(av))
554 SvREFCNT_inc_void(*sptr);
555 save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
557 /* If we're localizing a tied array element, this new sv
558 * won't actually be stored in the array - so it won't get
559 * reaped when the localize ends. Ensure it gets reaped by
560 * mortifying it instead. DAPM */
561 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
566 Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
571 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
575 SSPUSHPTR(SvREFCNT_inc_simple(hv));
576 SSPUSHPTR(newSVsv(key));
577 SSPUSHPTR(SvREFCNT_inc(*sptr));
578 SSPUSHINT(SAVEt_HELEM);
579 save_scalar_at(sptr, flags);
581 /* If we're localizing a tied hash element, this new sv
582 * won't actually be stored in the hash - so it won't get
583 * reaped when the localize ends. Ensure it gets reaped by
584 * mortifying it instead. DAPM */
585 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
590 Perl_save_svref(pTHX_ SV **sptr)
594 PERL_ARGS_ASSERT_SAVE_SVREF;
597 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
598 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
602 Perl_save_alloc(pTHX_ I32 size, I32 pad)
605 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
606 - (char*)PL_savestack);
607 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
611 PL_savestack_ix += elems;
613 SSPUSHINT(SAVEt_ALLOC);
618 Perl_leave_scope(pTHX_ I32 base)
631 Perl_croak(aTHX_ "panic: corrupt saved stack index");
632 while (PL_savestack_ix > base) {
636 case SAVEt_ITEM: /* normal string */
637 value = MUTABLE_SV(SSPOPPTR);
638 sv = MUTABLE_SV(SSPOPPTR);
639 sv_replace(sv,value);
644 case SAVEt_SV: /* scalar reference */
645 value = MUTABLE_SV(SSPOPPTR);
646 gv = MUTABLE_GV(SSPOPPTR);
648 av = MUTABLE_AV(gv); /* what to refcnt_dec */
657 if (av) /* actually an av, hv or gv */
660 case SAVEt_GENERIC_PVREF: /* generic pv */
662 str = (char*)SSPOPPTR;
663 if (*(char**)ptr != str) {
664 Safefree(*(char**)ptr);
668 case SAVEt_SHARED_PVREF: /* shared pv */
669 str = (char*)SSPOPPTR;
671 if (*(char**)ptr != str) {
673 PerlMem_free(*(char**)ptr);
675 PerlMemShared_free(*(char**)ptr);
680 case SAVEt_GENERIC_SVREF: /* generic sv */
681 value = MUTABLE_SV(SSPOPPTR);
688 case SAVEt_AV: /* array reference */
689 av = MUTABLE_AV(SSPOPPTR);
690 gv = MUTABLE_GV(SSPOPPTR);
692 SvREFCNT_dec(GvAV(gv));
697 SvSETMAGIC(MUTABLE_SV(av));
701 case SAVEt_HV: /* hash reference */
702 hv = MUTABLE_HV(SSPOPPTR);
703 gv = MUTABLE_GV(SSPOPPTR);
705 SvREFCNT_dec(GvHV(gv));
710 SvSETMAGIC(MUTABLE_SV(hv));
714 case SAVEt_INT: /* int reference */
716 *(int*)ptr = (int)SSPOPINT;
718 case SAVEt_BOOL: /* bool reference */
720 *(bool*)ptr = (bool)SSPOPBOOL;
722 case SAVEt_I32: /* I32 reference */
724 #ifdef PERL_DEBUG_READONLY_OPS
726 const I32 val = SSPOPINT;
727 if (*(I32*)ptr != val)
731 *(I32*)ptr = (I32)SSPOPINT;
734 case SAVEt_SPTR: /* SV* reference */
736 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
738 case SAVEt_VPTR: /* random* reference */
739 case SAVEt_PPTR: /* char* reference */
741 *(char**)ptr = (char*)SSPOPPTR;
743 case SAVEt_HPTR: /* HV* reference */
745 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
747 case SAVEt_APTR: /* AV* reference */
749 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
751 case SAVEt_GP: /* scalar reference */
753 gv = MUTABLE_GV(SSPOPPTR);
756 /* putting a method back into circulation ("local")*/
757 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
758 mro_method_changed_in(hv);
763 SvREFCNT_dec(MUTABLE_SV(ptr));
765 case SAVEt_MORTALIZESV:
767 sv_2mortal(MUTABLE_SV(ptr));
771 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
779 ptr = (void*)&PL_curpad[SSPOPLONG];
782 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
783 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
784 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
785 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
786 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
789 /* Can clear pad variable in place? */
790 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
792 * if a my variable that was made readonly is going out of
793 * scope, we want to remove the readonlyness so that it can
794 * go out of scope quietly
796 if (SvPADMY(sv) && !SvFAKE(sv))
799 if (SvTHINKFIRST(sv))
800 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
804 switch (SvTYPE(sv)) {
808 av_clear(MUTABLE_AV(sv));
811 hv_clear(MUTABLE_HV(sv));
814 Perl_croak(aTHX_ "panic: leave_scope pad code");
819 SvPADSTALE_on(sv); /* mark as no longer live */
821 else { /* Someone has a claim on this, so abandon it. */
822 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
823 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
824 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
825 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
826 default: *(SV**)ptr = newSV(0); break;
828 SvREFCNT_dec(sv); /* Cast current value to the winds. */
829 /* preserve pad nature, but also mark as not live
830 * for any closure capturing */
831 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
836 hv = MUTABLE_HV(ptr);
838 (void)hv_delete(hv, (char*)ptr, (I32)SSPOPINT, G_DISCARD);
842 case SAVEt_DESTRUCTOR_X:
844 (*SSPOPDXPTR)(aTHX_ ptr);
846 case SAVEt_REGCONTEXT:
849 PL_savestack_ix -= i; /* regexp must have croaked */
851 case SAVEt_STACK_POS: /* Position on Perl stack */
853 PL_stack_sp = PL_stack_base + i;
855 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
857 cxstack[i].blk_oldsp = SSPOPINT;
859 case SAVEt_AELEM: /* array element */
860 value = MUTABLE_SV(SSPOPPTR);
862 av = MUTABLE_AV(SSPOPPTR);
863 ptr = av_fetch(av,i,1);
864 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
868 if (sv && sv != &PL_sv_undef) {
869 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
870 SvREFCNT_inc_void_NN(sv);
877 case SAVEt_HELEM: /* hash element */
878 value = MUTABLE_SV(SSPOPPTR);
879 sv = MUTABLE_SV(SSPOPPTR);
880 hv = MUTABLE_HV(SSPOPPTR);
881 ptr = hv_fetch_ent(hv, sv, 1, 0);
883 const SV * const oval = HeVAL((HE*)ptr);
884 if (oval && oval != &PL_sv_undef) {
885 ptr = &HeVAL((HE*)ptr);
886 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
887 SvREFCNT_inc_void(*(SV**)ptr);
889 av = MUTABLE_AV(hv); /* what to refcnt_dec */
898 PL_op = (OP*)SSPOPPTR;
901 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
902 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
903 GvHV(PL_hintgv) = NULL;
905 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
906 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
907 *(I32*)&PL_hints = (I32)SSPOPINT;
908 if (PL_hints & HINT_LOCALIZE_HH) {
909 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
910 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
911 assert(GvHV(PL_hintgv));
912 } else if (!GvHV(PL_hintgv)) {
913 /* Need to add a new one manually, else gv_fetchpv() can
914 add one in this code:
916 if (SvTYPE(gv) == SVt_PVGV) {
919 gv_init_sv(gv, sv_type);
920 if (*name=='!' && sv_type == SVt_PVHV && len==1)
926 and it won't have the magic set. */
928 HV *const hv = newHV();
929 hv_magic(hv, NULL, PERL_MAGIC_hints);
930 GvHV(PL_hintgv) = hv;
932 assert(GvHV(PL_hintgv));
935 PL_comppad = (PAD*)SSPOPPTR;
937 PL_curpad = AvARRAY(PL_comppad);
941 case SAVEt_PADSV_AND_MORTALIZE:
943 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
947 svp = AvARRAY((PAD*)ptr) + off;
948 /* This mortalizing used to be done by POPLOOP() via itersave.
949 But as we have all the information here, we can do it here,
950 save even having to have itersave in the struct. */
952 *svp = MUTABLE_SV(SSPOPPTR);
955 case SAVEt_SAVESWITCHSTACK:
958 AV *const t = MUTABLE_AV(SSPOPPTR);
959 AV *const f = MUTABLE_AV(SSPOPPTR);
961 PL_curstackinfo->si_stack = f;
964 case SAVEt_SET_SVFLAGS:
966 const U32 val = (U32)SSPOPINT;
967 const U32 mask = (U32)SSPOPINT;
968 sv = MUTABLE_SV(SSPOPPTR);
969 SvFLAGS(sv) &= ~mask;
974 /* This would be a mathom, but Perl_save_svref() calls a static
975 function, S_save_scalar_at(), so has to stay in this file. */
976 case SAVEt_SVREF: /* scalar reference */
977 value = MUTABLE_SV(SSPOPPTR);
979 av = NULL; /* what to refcnt_dec */
982 /* These are only saved in mathoms.c */
984 gv = MUTABLE_GV(SSPOPPTR);
985 (void)sv_clear(MUTABLE_SV(gv));
987 case SAVEt_LONG: /* long reference */
989 *(long*)ptr = (long)SSPOPLONG;
991 case SAVEt_IV: /* IV reference */
993 *(IV*)ptr = (IV)SSPOPIV;
996 case SAVEt_I16: /* I16 reference */
998 *(I16*)ptr = (I16)SSPOPINT;
1000 case SAVEt_I8: /* I8 reference */
1002 *(I8*)ptr = (I8)SSPOPINT;
1004 case SAVEt_DESTRUCTOR:
1008 case SAVEt_COP_ARYBASE:
1011 CopARYBASE_set((COP *)ptr, i);
1013 case SAVEt_COMPILE_WARNINGS:
1016 if (!specialWARN(PL_compiling.cop_warnings))
1017 PerlMemShared_free(PL_compiling.cop_warnings);
1019 PL_compiling.cop_warnings = (STRLEN*)ptr;
1021 case SAVEt_RE_STATE:
1023 const struct re_save_state *const state
1024 = (struct re_save_state *)
1025 (PL_savestack + PL_savestack_ix
1026 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1027 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1029 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1030 Safefree(PL_reg_start_tmp);
1032 if (PL_reg_poscache != state->re_state_reg_poscache) {
1033 Safefree(PL_reg_poscache);
1035 Copy(state, &PL_reg_state, 1, struct re_save_state);
1040 parser_free((yy_parser *) ptr);
1043 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1049 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1053 PERL_ARGS_ASSERT_CX_DUMP;
1056 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1057 if (CxTYPE(cx) != CXt_SUBST) {
1058 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1059 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1060 PTR2UV(cx->blk_oldcop));
1061 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1062 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1063 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1064 PTR2UV(cx->blk_oldpm));
1065 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1067 switch (CxTYPE(cx)) {
1072 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1073 PTR2UV(cx->blk_format.cv));
1074 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1075 PTR2UV(cx->blk_format.gv));
1076 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1077 PTR2UV(cx->blk_format.dfoutgv));
1078 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
1079 (int)CxHASARGS(cx));
1080 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1081 PTR2UV(cx->blk_format.retop));
1084 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1085 PTR2UV(cx->blk_sub.cv));
1086 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1087 (long)cx->blk_sub.olddepth);
1088 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1089 (int)CxHASARGS(cx));
1090 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
1091 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1092 PTR2UV(cx->blk_sub.retop));
1095 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1096 (long)CxOLD_IN_EVAL(cx));
1097 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1098 PL_op_name[CxOLD_OP_TYPE(cx)],
1099 PL_op_desc[CxOLD_OP_TYPE(cx)]);
1100 if (cx->blk_eval.old_namesv)
1101 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1102 SvPVX_const(cx->blk_eval.old_namesv));
1103 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1104 PTR2UV(cx->blk_eval.old_eval_root));
1105 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1106 PTR2UV(cx->blk_eval.retop));
1109 case CXt_LOOP_LAZYIV:
1110 case CXt_LOOP_LAZYSV:
1112 case CXt_LOOP_PLAIN:
1113 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
1114 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1115 (long)cx->blk_loop.resetsp);
1116 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1117 PTR2UV(cx->blk_loop.my_op));
1118 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1119 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
1120 /* XXX: not accurate for LAZYSV/IV */
1121 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1122 PTR2UV(cx->blk_loop.state_u.ary.ary));
1123 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1124 (long)cx->blk_loop.state_u.ary.ix);
1125 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1126 PTR2UV(CxITERVAR(cx)));
1130 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1131 (long)cx->sb_iters);
1132 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1133 (long)cx->sb_maxiters);
1134 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1135 (long)cx->sb_rflags);
1136 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1138 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1140 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1141 PTR2UV(cx->sb_dstr));
1142 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1143 PTR2UV(cx->sb_targ));
1144 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1146 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1148 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1149 PTR2UV(cx->sb_strend));
1150 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1151 PTR2UV(cx->sb_rxres));
1155 PERL_UNUSED_CONTEXT;
1156 PERL_UNUSED_ARG(cx);
1157 #endif /* DEBUGGING */
1162 * c-indentation-style: bsd
1164 * indent-tabs-mode: t
1167 * ex: set ts=8 sts=4 sw=4 noet: