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)
173 PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
176 sv = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
178 if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
179 if (SvGMAGICAL(osv)) {
180 const bool oldtainted = PL_tainted;
181 SvFLAGS(osv) |= (SvFLAGS(osv) &
182 (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
183 PL_tainted = oldtainted;
185 if (!(flags & SAVEf_KEEPOLDELEM))
186 mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
193 Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
203 Perl_save_scalar(pTHX_ GV *gv)
206 SV ** const sptr = &GvSVn(gv);
208 PERL_ARGS_ASSERT_SAVE_SCALAR;
213 save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
214 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
217 /* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
218 * restore a global SV to its prior contents, freeing new value. */
220 Perl_save_generic_svref(pTHX_ SV **sptr)
224 PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
226 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
229 /* Like save_pptr(), but also Safefree()s the new value if it is different
230 * from the old one. Can be used to restore a global char* to its prior
231 * contents, freeing new value. */
233 Perl_save_generic_pvref(pTHX_ char **str)
237 PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
239 save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
242 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
243 * Can be used to restore a shared global char* to its prior
244 * contents, freeing new value. */
246 Perl_save_shared_pvref(pTHX_ char **str)
250 PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
252 save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
255 /* set the SvFLAGS specified by mask to the values in val */
258 Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
262 PERL_ARGS_ASSERT_SAVE_SET_SVFLAGS;
268 SSPUSHINT(SAVEt_SET_SVFLAGS);
272 Perl_save_gp(pTHX_ GV *gv, I32 empty)
276 PERL_ARGS_ASSERT_SAVE_GP;
278 save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
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))
316 save_pushptrptr(gv, oav, SAVEt_AV);
321 mg_localize(MUTABLE_SV(oav), MUTABLE_SV(av), TRUE);
326 Perl_save_hash(pTHX_ GV *gv)
331 PERL_ARGS_ASSERT_SAVE_HASH;
333 save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
338 mg_localize(MUTABLE_SV(ohv), MUTABLE_SV(hv), TRUE);
343 Perl_save_item(pTHX_ register SV *item)
346 register SV * const sv = newSVsv(item);
348 PERL_ARGS_ASSERT_SAVE_ITEM;
350 save_pushptrptr(item, /* remember the pointer */
351 sv, /* remember the value */
356 Perl_save_bool(pTHX_ bool *boolp)
360 PERL_ARGS_ASSERT_SAVE_BOOL;
365 SSPUSHINT(SAVEt_BOOL);
369 Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
379 Perl_save_int(pTHX_ int *intp)
383 PERL_ARGS_ASSERT_SAVE_INT;
385 save_pushi32ptr(*intp, intp, SAVEt_INT);
389 Perl_save_I8(pTHX_ I8 *bytep)
393 PERL_ARGS_ASSERT_SAVE_I8;
395 save_pushi32ptr(*bytep, bytep, SAVEt_I8);
399 Perl_save_I16(pTHX_ I16 *intp)
403 PERL_ARGS_ASSERT_SAVE_I16;
405 save_pushi32ptr(*intp, intp, SAVEt_I16);
409 Perl_save_I32(pTHX_ I32 *intp)
413 PERL_ARGS_ASSERT_SAVE_I32;
415 save_pushi32ptr(*intp, intp, SAVEt_I32);
418 /* Cannot use save_sptr() to store a char* since the SV** cast will
419 * force word-alignment and we'll miss the pointer.
422 Perl_save_pptr(pTHX_ char **pptr)
426 PERL_ARGS_ASSERT_SAVE_PPTR;
428 save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
432 Perl_save_vptr(pTHX_ void *ptr)
436 PERL_ARGS_ASSERT_SAVE_VPTR;
438 save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
442 Perl_save_sptr(pTHX_ SV **sptr)
446 PERL_ARGS_ASSERT_SAVE_SPTR;
448 save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
452 Perl_save_padsv_and_mortalize(pTHX_ PADOFFSET off)
456 ASSERT_CURPAD_ACTIVE("save_padsv");
457 SSPUSHPTR(SvREFCNT_inc_simple_NN(PL_curpad[off]));
458 SSPUSHPTR(PL_comppad);
459 SSPUSHLONG((long)off);
460 SSPUSHINT(SAVEt_PADSV_AND_MORTALIZE);
464 Perl_save_hptr(pTHX_ HV **hptr)
468 PERL_ARGS_ASSERT_SAVE_HPTR;
470 save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
474 Perl_save_aptr(pTHX_ AV **aptr)
478 PERL_ARGS_ASSERT_SAVE_APTR;
480 save_pushptrptr(*aptr, aptr, SAVEt_APTR);
484 Perl_save_pushptr(pTHX_ void *const ptr, const int type)
493 Perl_save_clearsv(pTHX_ SV **svp)
497 PERL_ARGS_ASSERT_SAVE_CLEARSV;
499 ASSERT_CURPAD_ACTIVE("save_clearsv");
501 SSPUSHLONG((long)(svp-PL_curpad));
502 SSPUSHINT(SAVEt_CLEARSV);
503 SvPADSTALE_off(*svp); /* mark lexical as active */
507 Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
511 PERL_ARGS_ASSERT_SAVE_DELETE;
513 save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
517 Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
523 PERL_ARGS_ASSERT_SAVE_HDELETE;
525 key = SvPV_const(keysv, len);
526 klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
527 SvREFCNT_inc_simple_void_NN(hv);
528 save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
532 Perl_save_adelete(pTHX_ AV *av, I32 key)
536 PERL_ARGS_ASSERT_SAVE_ADELETE;
538 SvREFCNT_inc_void(av);
539 save_pushi32ptr(key, av, SAVEt_ADELETE);
543 Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
547 PERL_ARGS_ASSERT_SAVE_DESTRUCTOR;
552 SSPUSHINT(SAVEt_DESTRUCTOR);
556 Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
562 SSPUSHINT(SAVEt_DESTRUCTOR_X);
566 Perl_save_hints(pTHX)
569 if (PL_compiling.cop_hints_hash) {
571 PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
574 if (PL_hints & HINT_LOCALIZE_HH) {
575 save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
576 PL_compiling.cop_hints_hash, SAVEt_HINTS);
577 GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
579 save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
584 S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
595 Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
600 PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
603 save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
605 /* if it gets reified later, the restore will have the wrong refcnt */
606 if (!AvREAL(av) && AvREIFY(av))
607 SvREFCNT_inc_void(*sptr);
608 save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
609 if (flags & SAVEf_KEEPOLDELEM)
612 /* If we're localizing a tied array element, this new sv
613 * won't actually be stored in the array - so it won't get
614 * reaped when the localize ends. Ensure it gets reaped by
615 * mortifying it instead. DAPM */
616 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
621 Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
626 PERL_ARGS_ASSERT_SAVE_HELEM_FLAGS;
630 SSPUSHPTR(SvREFCNT_inc_simple(hv));
631 SSPUSHPTR(newSVsv(key));
632 SSPUSHPTR(SvREFCNT_inc(*sptr));
633 SSPUSHINT(SAVEt_HELEM);
634 save_scalar_at(sptr, flags);
635 if (flags & SAVEf_KEEPOLDELEM)
638 /* If we're localizing a tied hash element, this new sv
639 * won't actually be stored in the hash - so it won't get
640 * reaped when the localize ends. Ensure it gets reaped by
641 * mortifying it instead. DAPM */
642 if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
647 Perl_save_svref(pTHX_ SV **sptr)
651 PERL_ARGS_ASSERT_SAVE_SVREF;
654 save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
655 return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
659 Perl_save_alloc(pTHX_ I32 size, I32 pad)
662 register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
663 - (char*)PL_savestack);
664 register const I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
668 PL_savestack_ix += elems;
670 SSPUSHINT(SAVEt_ALLOC);
675 Perl_leave_scope(pTHX_ I32 base)
686 /* Localise the effects of the TAINT_NOT inside the loop. */
687 const bool was = PL_tainted;
690 Perl_croak(aTHX_ "panic: corrupt saved stack index");
691 while (PL_savestack_ix > base) {
695 case SAVEt_ITEM: /* normal string */
696 value = MUTABLE_SV(SSPOPPTR);
697 sv = MUTABLE_SV(SSPOPPTR);
698 sv_replace(sv,value);
703 case SAVEt_SV: /* scalar reference */
704 value = MUTABLE_SV(SSPOPPTR);
705 gv = MUTABLE_GV(SSPOPPTR);
707 av = MUTABLE_AV(gv); /* what to refcnt_dec */
716 if (av) /* actually an av, hv or gv */
719 case SAVEt_GENERIC_PVREF: /* generic pv */
721 str = (char*)SSPOPPTR;
722 if (*(char**)ptr != str) {
723 Safefree(*(char**)ptr);
727 case SAVEt_SHARED_PVREF: /* shared pv */
728 str = (char*)SSPOPPTR;
730 if (*(char**)ptr != str) {
732 PerlMem_free(*(char**)ptr);
734 PerlMemShared_free(*(char**)ptr);
739 case SAVEt_GENERIC_SVREF: /* generic sv */
740 value = MUTABLE_SV(SSPOPPTR);
747 case SAVEt_AV: /* array reference */
748 av = MUTABLE_AV(SSPOPPTR);
749 gv = MUTABLE_GV(SSPOPPTR);
750 SvREFCNT_dec(GvAV(gv));
754 SvSETMAGIC(MUTABLE_SV(av));
758 case SAVEt_HV: /* hash reference */
759 hv = MUTABLE_HV(SSPOPPTR);
760 gv = MUTABLE_GV(SSPOPPTR);
761 SvREFCNT_dec(GvHV(gv));
765 SvSETMAGIC(MUTABLE_SV(hv));
769 case SAVEt_INT: /* int reference */
771 *(int*)ptr = (int)SSPOPINT;
773 case SAVEt_BOOL: /* bool reference */
775 *(bool*)ptr = (bool)SSPOPBOOL;
777 case SAVEt_I32: /* I32 reference */
779 #ifdef PERL_DEBUG_READONLY_OPS
781 const I32 val = SSPOPINT;
782 if (*(I32*)ptr != val)
786 *(I32*)ptr = (I32)SSPOPINT;
789 case SAVEt_SPTR: /* SV* reference */
791 *(SV**)ptr = MUTABLE_SV(SSPOPPTR);
793 case SAVEt_VPTR: /* random* reference */
794 case SAVEt_PPTR: /* char* reference */
796 *(char**)ptr = (char*)SSPOPPTR;
798 case SAVEt_HPTR: /* HV* reference */
800 *(HV**)ptr = MUTABLE_HV(SSPOPPTR);
802 case SAVEt_APTR: /* AV* reference */
804 *(AV**)ptr = MUTABLE_AV(SSPOPPTR);
806 case SAVEt_GP: /* scalar reference */
808 gv = MUTABLE_GV(SSPOPPTR);
811 /* putting a method back into circulation ("local")*/
812 if (GvCVu(gv) && (hv=GvSTASH(gv)) && HvNAME_get(hv))
813 mro_method_changed_in(hv);
818 SvREFCNT_dec(MUTABLE_SV(ptr));
820 case SAVEt_MORTALIZESV:
822 sv_2mortal(MUTABLE_SV(ptr));
826 ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
834 ptr = (void*)&PL_curpad[SSPOPLONG];
837 DEBUG_Xv(PerlIO_printf(Perl_debug_log,
838 "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
839 PTR2UV(PL_comppad), PTR2UV(PL_curpad),
840 (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
841 (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
844 /* Can clear pad variable in place? */
845 if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
847 * if a my variable that was made readonly is going out of
848 * scope, we want to remove the readonlyness so that it can
849 * go out of scope quietly
851 if (SvPADMY(sv) && !SvFAKE(sv))
854 if (SvTHINKFIRST(sv))
855 sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
859 switch (SvTYPE(sv)) {
863 av_clear(MUTABLE_AV(sv));
866 hv_clear(MUTABLE_HV(sv));
869 Perl_croak(aTHX_ "panic: leave_scope pad code");
874 SvPADSTALE_on(sv); /* mark as no longer live */
876 else { /* Someone has a claim on this, so abandon it. */
877 const U32 padflags = SvFLAGS(sv) & (SVs_PADMY|SVs_PADTMP);
878 switch (SvTYPE(sv)) { /* Console ourselves with a new value */
879 case SVt_PVAV: *(SV**)ptr = MUTABLE_SV(newAV()); break;
880 case SVt_PVHV: *(SV**)ptr = MUTABLE_SV(newHV()); break;
881 default: *(SV**)ptr = newSV(0); break;
883 SvREFCNT_dec(sv); /* Cast current value to the winds. */
884 /* preserve pad nature, but also mark as not live
885 * for any closure capturing */
886 SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
891 hv = MUTABLE_HV(ptr);
894 (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
900 av = MUTABLE_AV(ptr);
902 (void)av_delete(av, i, G_DISCARD);
905 case SAVEt_DESTRUCTOR_X:
907 (*SSPOPDXPTR)(aTHX_ ptr);
909 case SAVEt_REGCONTEXT:
912 PL_savestack_ix -= i; /* regexp must have croaked */
914 case SAVEt_STACK_POS: /* Position on Perl stack */
916 PL_stack_sp = PL_stack_base + i;
918 case SAVEt_STACK_CXPOS: /* blk_oldsp on context stack */
920 cxstack[i].blk_oldsp = SSPOPINT;
922 case SAVEt_AELEM: /* array element */
923 value = MUTABLE_SV(SSPOPPTR);
925 av = MUTABLE_AV(SSPOPPTR);
926 ptr = av_fetch(av,i,1);
927 if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
931 if (sv && sv != &PL_sv_undef) {
932 if (SvTIED_mg((const SV *)av, PERL_MAGIC_tied))
933 SvREFCNT_inc_void_NN(sv);
940 case SAVEt_HELEM: /* hash element */
941 value = MUTABLE_SV(SSPOPPTR);
942 sv = MUTABLE_SV(SSPOPPTR);
943 hv = MUTABLE_HV(SSPOPPTR);
944 ptr = hv_fetch_ent(hv, sv, 1, 0);
947 const SV * const oval = HeVAL((HE*)ptr);
948 if (oval && oval != &PL_sv_undef) {
949 ptr = &HeVAL((HE*)ptr);
950 if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
951 SvREFCNT_inc_void(*(SV**)ptr);
952 av = MUTABLE_AV(hv); /* what to refcnt_dec */
960 PL_op = (OP*)SSPOPPTR;
963 if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
964 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
965 GvHV(PL_hintgv) = NULL;
967 Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
968 PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
969 *(I32*)&PL_hints = (I32)SSPOPINT;
970 if (PL_hints & HINT_LOCALIZE_HH) {
971 SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
972 GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
973 assert(GvHV(PL_hintgv));
974 } else if (!GvHV(PL_hintgv)) {
975 /* Need to add a new one manually, else gv_fetchpv() can
976 add one in this code:
978 if (SvTYPE(gv) == SVt_PVGV) {
981 gv_init_sv(gv, sv_type);
982 if (*name=='!' && sv_type == SVt_PVHV && len==1)
988 and it won't have the magic set. */
990 HV *const hv = newHV();
991 hv_magic(hv, NULL, PERL_MAGIC_hints);
992 GvHV(PL_hintgv) = hv;
994 assert(GvHV(PL_hintgv));
997 PL_comppad = (PAD*)SSPOPPTR;
999 PL_curpad = AvARRAY(PL_comppad);
1003 case SAVEt_PADSV_AND_MORTALIZE:
1005 const PADOFFSET off = (PADOFFSET)SSPOPLONG;
1009 svp = AvARRAY((PAD*)ptr) + off;
1010 /* This mortalizing used to be done by POPLOOP() via itersave.
1011 But as we have all the information here, we can do it here,
1012 save even having to have itersave in the struct. */
1014 *svp = MUTABLE_SV(SSPOPPTR);
1017 case SAVEt_SAVESWITCHSTACK:
1020 AV *const t = MUTABLE_AV(SSPOPPTR);
1021 AV *const f = MUTABLE_AV(SSPOPPTR);
1023 PL_curstackinfo->si_stack = f;
1026 case SAVEt_SET_SVFLAGS:
1028 const U32 val = (U32)SSPOPINT;
1029 const U32 mask = (U32)SSPOPINT;
1030 sv = MUTABLE_SV(SSPOPPTR);
1031 SvFLAGS(sv) &= ~mask;
1036 /* This would be a mathom, but Perl_save_svref() calls a static
1037 function, S_save_scalar_at(), so has to stay in this file. */
1038 case SAVEt_SVREF: /* scalar reference */
1039 value = MUTABLE_SV(SSPOPPTR);
1041 av = NULL; /* what to refcnt_dec */
1044 /* These are only saved in mathoms.c */
1046 gv = MUTABLE_GV(SSPOPPTR);
1047 (void)sv_clear(MUTABLE_SV(gv));
1049 case SAVEt_LONG: /* long reference */
1051 *(long*)ptr = (long)SSPOPLONG;
1053 case SAVEt_IV: /* IV reference */
1055 *(IV*)ptr = (IV)SSPOPIV;
1058 case SAVEt_I16: /* I16 reference */
1060 *(I16*)ptr = (I16)SSPOPINT;
1062 case SAVEt_I8: /* I8 reference */
1064 *(I8*)ptr = (I8)SSPOPINT;
1066 case SAVEt_DESTRUCTOR:
1070 case SAVEt_COP_ARYBASE:
1073 CopARYBASE_set((COP *)ptr, i);
1075 case SAVEt_COMPILE_WARNINGS:
1078 if (!specialWARN(PL_compiling.cop_warnings))
1079 PerlMemShared_free(PL_compiling.cop_warnings);
1081 PL_compiling.cop_warnings = (STRLEN*)ptr;
1083 case SAVEt_RE_STATE:
1085 const struct re_save_state *const state
1086 = (struct re_save_state *)
1087 (PL_savestack + PL_savestack_ix
1088 - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
1089 PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
1091 if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
1092 Safefree(PL_reg_start_tmp);
1094 if (PL_reg_poscache != state->re_state_reg_poscache) {
1095 Safefree(PL_reg_poscache);
1097 Copy(state, &PL_reg_state, 1, struct re_save_state);
1102 parser_free((yy_parser *) ptr);
1105 Perl_croak(aTHX_ "panic: leave_scope inconsistency");
1113 Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
1117 PERL_ARGS_ASSERT_CX_DUMP;
1120 PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
1121 if (CxTYPE(cx) != CXt_SUBST) {
1122 PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
1123 PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
1124 PTR2UV(cx->blk_oldcop));
1125 PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
1126 PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
1127 PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%"UVxf"\n",
1128 PTR2UV(cx->blk_oldpm));
1129 PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
1131 switch (CxTYPE(cx)) {
1136 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.CV = 0x%"UVxf"\n",
1137 PTR2UV(cx->blk_format.cv));
1138 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.GV = 0x%"UVxf"\n",
1139 PTR2UV(cx->blk_format.gv));
1140 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.DFOUTGV = 0x%"UVxf"\n",
1141 PTR2UV(cx->blk_format.dfoutgv));
1142 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.HASARGS = %d\n",
1143 (int)CxHASARGS(cx));
1144 PerlIO_printf(Perl_debug_log, "BLK_FORMAT.RETOP = 0x%"UVxf"\n",
1145 PTR2UV(cx->blk_format.retop));
1148 PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
1149 PTR2UV(cx->blk_sub.cv));
1150 PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
1151 (long)cx->blk_sub.olddepth);
1152 PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
1153 (int)CxHASARGS(cx));
1154 PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n", (int)CxLVAL(cx));
1155 PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
1156 PTR2UV(cx->blk_sub.retop));
1159 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
1160 (long)CxOLD_IN_EVAL(cx));
1161 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
1162 PL_op_name[CxOLD_OP_TYPE(cx)],
1163 PL_op_desc[CxOLD_OP_TYPE(cx)]);
1164 if (cx->blk_eval.old_namesv)
1165 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
1166 SvPVX_const(cx->blk_eval.old_namesv));
1167 PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
1168 PTR2UV(cx->blk_eval.old_eval_root));
1169 PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
1170 PTR2UV(cx->blk_eval.retop));
1173 case CXt_LOOP_LAZYIV:
1174 case CXt_LOOP_LAZYSV:
1176 case CXt_LOOP_PLAIN:
1177 PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n", CxLABEL(cx));
1178 PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
1179 (long)cx->blk_loop.resetsp);
1180 PerlIO_printf(Perl_debug_log, "BLK_LOOP.MY_OP = 0x%"UVxf"\n",
1181 PTR2UV(cx->blk_loop.my_op));
1182 PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%"UVxf"\n",
1183 PTR2UV(CX_LOOP_NEXTOP_GET(cx)));
1184 /* XXX: not accurate for LAZYSV/IV */
1185 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%"UVxf"\n",
1186 PTR2UV(cx->blk_loop.state_u.ary.ary));
1187 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
1188 (long)cx->blk_loop.state_u.ary.ix);
1189 PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%"UVxf"\n",
1190 PTR2UV(CxITERVAR(cx)));
1194 PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
1195 (long)cx->sb_iters);
1196 PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
1197 (long)cx->sb_maxiters);
1198 PerlIO_printf(Perl_debug_log, "SB_RFLAGS = %ld\n",
1199 (long)cx->sb_rflags);
1200 PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
1202 PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
1204 PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%"UVxf"\n",
1205 PTR2UV(cx->sb_dstr));
1206 PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%"UVxf"\n",
1207 PTR2UV(cx->sb_targ));
1208 PerlIO_printf(Perl_debug_log, "SB_S = 0x%"UVxf"\n",
1210 PerlIO_printf(Perl_debug_log, "SB_M = 0x%"UVxf"\n",
1212 PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%"UVxf"\n",
1213 PTR2UV(cx->sb_strend));
1214 PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%"UVxf"\n",
1215 PTR2UV(cx->sb_rxres));
1219 PERL_UNUSED_CONTEXT;
1220 PERL_UNUSED_ARG(cx);
1221 #endif /* DEBUGGING */
1226 * c-indentation-style: bsd
1228 * indent-tabs-mode: t
1231 * ex: set ts=8 sts=4 sw=4 noet: