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_scalar(pTHX_ GV *gv)
191 SV ** const sptr = &GvSVn(gv);
193 PERL_ARGS_ASSERT_SAVE_SCALAR;
199 SSPUSHPTR(SvREFCNT_inc_simple(gv));
200 SSPUSHPTR(SvREFCNT_inc(*sptr));
202 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
205 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
206 * restore a global SV to its prior contents, freeing new value. */
208 Perl_save_generic_svref(pTHX_ SV **sptr)
212 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
216 SSPUSHPTR(SvREFCNT_inc(*sptr));
217 SSPUSHINT(SAVEt_GENERIC_SVREF);
220 /* Like save_pptr(), but also Safefree()s the new value if it is different
221 * from the old one. Can be used to restore a global char* to its prior
222 * contents, freeing new value. */
224 Perl_save_generic_pvref(pTHX_ char **str)
228 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
233 SSPUSHINT(SAVEt_GENERIC_PVREF);
236 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
237 * Can be used to restore a shared global char* to its prior
238 * contents, freeing new value. */
240 Perl_save_shared_pvref(pTHX_ char **str)
244 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
249 SSPUSHINT(SAVEt_SHARED_PVREF);
252 /* set the SvFLAGS specified by mask to the values in val */
255 Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
259 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
265 SSPUSHINT(SAVEt_SET_SVFLAGS);
269 Perl_save_gp(pTHX_ GV *gv, I32 empty)
273 PERL_ARGS_ASSERT_SAVE_GP;
276 SSPUSHPTR(SvREFCNT_inc(gv));
281 GP *gp = Perl_newGP(aTHX_ gv);
284 mro_method_changed_in(GvSTASH(gv)); /* taking a method out of circulation ("local")*/
285 if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
287 IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
289 #ifdef PERL_DONT_CREATE_GVSV
290 if (gv == PL_errgv) {
291 /* We could scatter this logic everywhere by changing the
292 definition of ERRSV from GvSV() to GvSVn(), but it seems more
293 efficient to do this check once here. */
294 gp->gp_sv = newSV(0);
306 Perl_save_ary(pTHX_ GV *gv)
309 AV * const oav = GvAVn(gv);
312 PERL_ARGS_ASSERT_SAVE_ARY;
314 if (!AvREAL(oav) && AvREIFY(oav))
324 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
329 Perl_save_hash(pTHX_ GV *gv)
334 PERL_ARGS_ASSERT_SAVE_HASH;
338 SSPUSHPTR(ohv = GvHVn(gv));
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;
357 SSPUSHPTR(item); /* remember the pointer */
358 SSPUSHPTR(sv); /* remember the value */
359 SSPUSHINT(SAVEt_ITEM);
363 Perl_save_int(pTHX_ int *intp)
367 PERL_ARGS_ASSERT_SAVE_INT;
372 SSPUSHINT(SAVEt_INT);
376 Perl_save_bool(pTHX_ bool *boolp)
380 PERL_ARGS_ASSERT_SAVE_BOOL;
385 SSPUSHINT(SAVEt_BOOL);
389 Perl_save_I8(pTHX_ I8 *bytep)
393 PERL_ARGS_ASSERT_SAVE_I8;
402 Perl_save_I16(pTHX_ I16 *intp)
406 PERL_ARGS_ASSERT_SAVE_I16;
411 SSPUSHINT(SAVEt_I16);
415 Perl_save_I32(pTHX_ I32 *intp)
419 PERL_ARGS_ASSERT_SAVE_I32;
424 SSPUSHINT(SAVEt_I32);
427 /* Cannot use save_sptr() to store a char* since the SV** cast will
428 * force word-alignment and we'll miss the pointer.
431 Perl_save_pptr(pTHX_ char **pptr)
435 PERL_ARGS_ASSERT_SAVE_PPTR;
440 SSPUSHINT(SAVEt_PPTR);
444 Perl_save_vptr(pTHX_ void *ptr)
448 PERL_ARGS_ASSERT_SAVE_VPTR;
451 SSPUSHPTR(*(char**)ptr);
453 SSPUSHINT(SAVEt_VPTR);
457 Perl_save_sptr(pTHX_ SV **sptr)
461 PERL_ARGS_ASSERT_SAVE_SPTR;
466 SSPUSHINT(SAVEt_SPTR);
470 Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
474 ASSERT_CURPAD_ACTIVE("save_padsv");
475 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
476 SSPUSHPTR(PL_comppad);
477 SSPUSHLONG((long)off);
478 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
482 Perl_save_hptr(pTHX_ HV **hptr)
486 PERL_ARGS_ASSERT_SAVE_HPTR;
491 SSPUSHINT(SAVEt_HPTR);
495 Perl_save_aptr(pTHX_ AV **aptr)
499 PERL_ARGS_ASSERT_SAVE_APTR;
504 SSPUSHINT(SAVEt_APTR);
508 Perl_save_pushptr(pTHX_ void *const ptr, const int type)
517 Perl_save_clearsv(pTHX_ SV **svp)
521 PERL_ARGS_ASSERT_SAVE_CLEARSV;
523 ASSERT_CURPAD_ACTIVE("save_clearsv");
525 SSPUSHLONG((long)(svp-PL_curpad));
526 SSPUSHINT(SAVEt_CLEARSV);
527 SvPADSTALE_off(*svp); /* mark lexical as active */
531 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
535 PERL_ARGS_ASSERT_SAVE_DELETE;
540 SSPUSHPTR(SvREFCNT_inc_simple(hv));
541 SSPUSHINT(SAVEt_DELETE);
545 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
549 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
554 SSPUSHINT(SAVEt_DESTRUCTOR);
558 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
564 SSPUSHINT(SAVEt_DESTRUCTOR_X);
568 Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
573 PERL_ARGS_ASSERT_SAVE_AELEM;
577 SSPUSHPTR(SvREFCNT_inc_simple(av));
579 SSPUSHPTR(SvREFCNT_inc(*sptr));
580 SSPUSHINT(SAVEt_AELEM);
581 /* if it gets reified later, the restore will have the wrong refcnt */
582 if (!AvREAL(av) && AvREIFY(av))
583 SvREFCNT_inc_void(*sptr);
584 save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
586 /* If we're localizing a tied array element, this new sv
587 * won't actually be stored in the array - so it won't get
588 * reaped when the localize ends. Ensure it gets reaped by
589 * mortifying it instead. DAPM */
590 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
595 Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
600 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
604 SSPUSHPTR(SvREFCNT_inc_simple(hv));
605 SSPUSHPTR(newSVsv(key));
606 SSPUSHPTR(SvREFCNT_inc(*sptr));
607 SSPUSHINT(SAVEt_HELEM);
608 save_scalar_at(sptr, flags);
610 /* If we're localizing a tied hash element, this new sv
611 * won't actually be stored in the hash - so it won't get
612 * reaped when the localize ends. Ensure it gets reaped by
613 * mortifying it instead. DAPM */
614 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
619 Perl_save_svref(pTHX_ SV **sptr)
623 PERL_ARGS_ASSERT_SAVE_SVREF;
628 SSPUSHPTR(SvREFCNT_inc(*sptr));
629 SSPUSHINT(SAVEt_SVREF);
630 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
634 Perl_save_alloc(pTHX_ I32 size, I32 pad)
637 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
638 - (char*)PL_savestack);
639 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
643 PL_savestack_ix += elems;
645 SSPUSHINT(SAVEt_ALLOC);
650 Perl_leave_scope(pTHX_ I32 base)
663 Perl_croak(aTHX_ "panic: corrupt saved stack index");
664 while (PL_savestack_ix > base) {
668 case SAVEt_ITEM: /* normal string */
669 value = MUTABLE_SV(SSPOPPTR);
670 sv = MUTABLE_SV(SSPOPPTR);
671 sv_replace(sv,value);
676 case SAVEt_SV: /* scalar reference */
677 value = MUTABLE_SV(SSPOPPTR);
678 gv = MUTABLE_GV(SSPOPPTR);
680 av = MUTABLE_AV(gv); /* what to refcnt_dec */
689 if (av) /* actually an av, hv or gv */
692 case SAVEt_GENERIC_PVREF: /* generic pv */
694 str = (char*)SSPOPPTR;
695 if (*(char**)ptr != str) {
696 Safefree(*(char**)ptr);
700 case SAVEt_SHARED_PVREF: /* shared pv */
701 str = (char*)SSPOPPTR;
703 if (*(char**)ptr != str) {
705 PerlMem_free(*(char**)ptr);
707 PerlMemShared_free(*(char**)ptr);
712 case SAVEt_GENERIC_SVREF: /* generic sv */
713 value = MUTABLE_SV(SSPOPPTR);
720 case SAVEt_AV: /* array reference */
721 av = MUTABLE_AV(SSPOPPTR);
722 gv = MUTABLE_GV(SSPOPPTR);
724 SvREFCNT_dec(GvAV(gv));
729 SvSETMAGIC(MUTABLE_SV(av));
733 case SAVEt_HV: /* hash reference */
734 hv = MUTABLE_HV(SSPOPPTR);
735 gv = MUTABLE_GV(SSPOPPTR);
737 SvREFCNT_dec(GvHV(gv));
742 SvSETMAGIC(MUTABLE_SV(hv));
746 case SAVEt_INT: /* int reference */
748 *(int*)ptr = (int)SSPOPINT;
750 case SAVEt_BOOL: /* bool reference */
752 *(bool*)ptr = (bool)SSPOPBOOL;
754 case SAVEt_I32: /* I32 reference */
756 #ifdef PERL_DEBUG_READONLY_OPS
758 const I32 val = SSPOPINT;
759 if (*(I32*)ptr != val)
763 *(I32*)ptr = (I32)SSPOPINT;
766 case SAVEt_SPTR: /* SV* reference */
768 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
770 case SAVEt_VPTR: /* random* reference */
771 case SAVEt_PPTR: /* char* reference */
773 *(char**)ptr = (char*)SSPOPPTR;
775 case SAVEt_HPTR: /* HV* reference */
777 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
779 case SAVEt_APTR: /* AV* reference */
781 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
783 case SAVEt_GP: /* scalar reference */
785 gv = MUTABLE_GV(SSPOPPTR);
788 /* putting a method back into circulation ("local")*/
789 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
790 mro_method_changed_in(hv);
795 SvREFCNT_dec(MUTABLE_SV(ptr));
797 case SAVEt_MORTALIZESV:
799 sv_2mortal(MUTABLE_SV(ptr));
803 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
811 ptr = (void*)&PL_curpad[SSPOPLONG];
814 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
815 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
816 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
817 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
818 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
821 /* Can clear pad variable in place? */
822 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
824 * if a my variable that was made readonly is going out of
825 * scope, we want to remove the readonlyness so that it can
826 * go out of scope quietly
828 if (SvPADMY(sv) && !SvFAKE(sv))
831 if (SvTHINKFIRST(sv))
832 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
836 switch (SvTYPE(sv)) {
840 av_clear(MUTABLE_AV(sv));
843 hv_clear(MUTABLE_HV(sv));
846 Perl_croak(aTHX_ "panic: leave_scope pad code");
851 SvPADSTALE_on(sv); /* mark as no longer live */
853 else { /* Someone has a claim on this, so abandon it. */
854 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
855 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
856 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
857 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
858 default: *(SV**)ptr = newSV(0); break;
860 SvREFCNT_dec(sv); /* Cast current value to the winds. */
861 /* preserve pad nature, but also mark as not live
862 * for any closure capturing */
863 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
868 hv = MUTABLE_HV(ptr);
870 (void)hv_delete(hv, (char*)ptr, (I32)SSPOPINT, G_DISCARD);
874 case SAVEt_DESTRUCTOR_X:
876 (*SSPOPDXPTR)(aTHX_ ptr);
878 case SAVEt_REGCONTEXT:
881 PL_savestack_ix -= i; /* regexp must have croaked */
883 case SAVEt_STACK_POS: /* Position on Perl stack */
885 PL_stack_sp = PL_stack_base + i;
887 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
889 cxstack[i].blk_oldsp = SSPOPINT;
891 case SAVEt_AELEM: /* array element */
892 value = MUTABLE_SV(SSPOPPTR);
894 av = MUTABLE_AV(SSPOPPTR);
895 ptr = av_fetch(av,i,1);
896 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
900 if (sv && sv != &PL_sv_undef) {
901 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
902 SvREFCNT_inc_void_NN(sv);
909 case SAVEt_HELEM: /* hash element */
910 value = MUTABLE_SV(SSPOPPTR);
911 sv = MUTABLE_SV(SSPOPPTR);
912 hv = MUTABLE_HV(SSPOPPTR);
913 ptr = hv_fetch_ent(hv, sv, 1, 0);
915 const SV * const oval = HeVAL((HE*)ptr);
916 if (oval && oval != &PL_sv_undef) {
917 ptr = &HeVAL((HE*)ptr);
918 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
919 SvREFCNT_inc_void(*(SV**)ptr);
921 av = MUTABLE_AV(hv); /* what to refcnt_dec */
930 PL_op = (OP*)SSPOPPTR;
933 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
934 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
935 GvHV(PL_hintgv) = NULL;
937 *(I32*)&PL_hints = (I32)SSPOPINT;
938 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
939 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
940 if (PL_hints & HINT_LOCALIZE_HH) {
941 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
942 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
943 assert(GvHV(PL_hintgv));
944 } else if (!GvHV(PL_hintgv)) {
945 /* Need to add a new one manually, else gv_fetchpv() can
946 add one in this code:
948 if (SvTYPE(gv) == SVt_PVGV) {
951 gv_init_sv(gv, sv_type);
952 if (*name=='!' && sv_type == SVt_PVHV && len==1)
958 and it won't have the magic set. */
960 HV *const hv = newHV();
961 hv_magic(hv, NULL, PERL_MAGIC_hints);
962 GvHV(PL_hintgv) = hv;
964 assert(GvHV(PL_hintgv));
967 PL_comppad = (PAD*)SSPOPPTR;
969 PL_curpad = AvARRAY(PL_comppad);
973 case SAVEt_PADSV_AND_MORTALIZE:
975 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
979 svp = AvARRAY((PAD*)ptr) + off;
980 /* This mortalizing used to be done by POPLOOP() via itersave.
981 But as we have all the information here, we can do it here,
982 save even having to have itersave in the struct. */
984 *svp = MUTABLE_SV(SSPOPPTR);
987 case SAVEt_SAVESWITCHSTACK:
990 AV *const t = MUTABLE_AV(SSPOPPTR);
991 AV *const f = MUTABLE_AV(SSPOPPTR);
993 PL_curstackinfo->si_stack = f;
996 case SAVEt_SET_SVFLAGS:
998 const U32 val = (U32)SSPOPINT;
999 const U32 mask = (U32)SSPOPINT;
1000 sv = MUTABLE_SV(SSPOPPTR);
1001 SvFLAGS(sv) &= ~mask;
1006 /* This would be a mathom, but Perl_save_svref() calls a static
1007 function, S_save_scalar_at(), so has to stay in this file. */
1008 case SAVEt_SVREF: /* scalar reference */
1009 value = MUTABLE_SV(SSPOPPTR);
1011 av = NULL; /* what to refcnt_dec */
1014 /* These are only saved in mathoms.c */
1016 gv = MUTABLE_GV(SSPOPPTR);
1017 (void)sv_clear(MUTABLE_SV(gv));
1019 case SAVEt_LONG: /* long reference */
1021 *(long*)ptr = (long)SSPOPLONG;
1023 case SAVEt_IV: /* IV reference */
1025 *(IV*)ptr = (IV)SSPOPIV;
1028 case SAVEt_I16: /* I16 reference */
1030 *(I16*)ptr = (I16)SSPOPINT;
1032 case SAVEt_I8: /* I8 reference */
1034 *(I8*)ptr = (I8)SSPOPINT;
1036 case SAVEt_DESTRUCTOR:
1040 case SAVEt_COP_ARYBASE:
1043 CopARYBASE_set((COP *)ptr, i);
1045 case SAVEt_COMPILE_WARNINGS:
1048 if (!specialWARN(PL_compiling.cop_warnings))
1049 PerlMemShared_free(PL_compiling.cop_warnings);
1051 PL_compiling.cop_warnings = (STRLEN*)ptr;
1053 case SAVEt_RE_STATE:
1055 const struct re_save_state *const state
1056 = (struct re_save_state *)
1057 (PL_savestack + PL_savestack_ix
1058 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1059 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1061 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1062 Safefree(PL_reg_start_tmp);
1064 if (PL_reg_poscache != state->re_state_reg_poscache) {
1065 Safefree(PL_reg_poscache);
1067 Copy(state, &PL_reg_state, 1, struct re_save_state);
1072 parser_free((yy_parser *) ptr);
1075 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1081 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1085 PERL_ARGS_ASSERT_CX_DUMP;
1088 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1089 if (CxTYPE(cx) != CXt_SUBST) {
1090 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1091 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1092 PTR2UV(cx->blk_oldcop));
1093 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1094 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1095 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1096 PTR2UV(cx->blk_oldpm));
1097 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1099 switch (CxTYPE(cx)) {
1104 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1105 PTR2UV(cx->blk_format.cv));
1106 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1107 PTR2UV(cx->blk_format.gv));
1108 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1109 PTR2UV(cx->blk_format.dfoutgv));
1110 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
1111 (int)CxHASARGS(cx));
1112 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1113 PTR2UV(cx->blk_format.retop));
1116 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1117 PTR2UV(cx->blk_sub.cv));
1118 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1119 (long)cx->blk_sub.olddepth);
1120 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1121 (int)CxHASARGS(cx));
1122 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
1123 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1124 PTR2UV(cx->blk_sub.retop));
1127 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1128 (long)CxOLD_IN_EVAL(cx));
1129 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1130 PL_op_name[CxOLD_OP_TYPE(cx)],
1131 PL_op_desc[CxOLD_OP_TYPE(cx)]);
1132 if (cx->blk_eval.old_namesv)
1133 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1134 SvPVX_const(cx->blk_eval.old_namesv));
1135 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1136 PTR2UV(cx->blk_eval.old_eval_root));
1137 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1138 PTR2UV(cx->blk_eval.retop));
1141 case CXt_LOOP_LAZYIV:
1142 case CXt_LOOP_LAZYSV:
1144 case CXt_LOOP_PLAIN:
1145 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
1146 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1147 (long)cx->blk_loop.resetsp);
1148 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1149 PTR2UV(cx->blk_loop.my_op));
1150 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1151 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
1152 /* XXX: not accurate for LAZYSV/IV */
1153 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1154 PTR2UV(cx->blk_loop.state_u.ary.ary));
1155 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1156 (long)cx->blk_loop.state_u.ary.ix);
1157 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1158 PTR2UV(CxITERVAR(cx)));
1162 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1163 (long)cx->sb_iters);
1164 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1165 (long)cx->sb_maxiters);
1166 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1167 (long)cx->sb_rflags);
1168 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1170 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1172 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1173 PTR2UV(cx->sb_dstr));
1174 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1175 PTR2UV(cx->sb_targ));
1176 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1178 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1180 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1181 PTR2UV(cx->sb_strend));
1182 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1183 PTR2UV(cx->sb_rxres));
1187 PERL_UNUSED_CONTEXT;
1188 PERL_UNUSED_ARG(cx);
1189 #endif /* DEBUGGING */
1194 * c-indentation-style: bsd
1196 * indent-tabs-mode: t
1199 * ex: set ts=8 sts=4 sw=4 noet: