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-rw-r--r--contrib/perl5/scope.c915
1 files changed, 915 insertions, 0 deletions
diff --git a/contrib/perl5/scope.c b/contrib/perl5/scope.c
new file mode 100644
index 0000000..067e29e
--- /dev/null
+++ b/contrib/perl5/scope.c
@@ -0,0 +1,915 @@
+/* scope.c
+ *
+ * Copyright (c) 1991-1997, Larry Wall
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Artistic License, as specified in the README file.
+ *
+ */
+
+/*
+ * "For the fashion of Minas Tirith was such that it was built on seven
+ * levels..."
+ */
+
+#include "EXTERN.h"
+#include "perl.h"
+
+SV**
+stack_grow(SV **sp, SV **p, int n)
+{
+ dTHR;
+#if defined(DEBUGGING) && !defined(USE_THREADS)
+ static int growing = 0;
+ if (growing++)
+ abort();
+#endif
+ PL_stack_sp = sp;
+#ifndef STRESS_REALLOC
+ av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
+#else
+ av_extend(PL_curstack, (p - PL_stack_base) + (n) + 1);
+#endif
+#if defined(DEBUGGING) && !defined(USE_THREADS)
+ growing--;
+#endif
+ return PL_stack_sp;
+}
+
+#ifndef STRESS_REALLOC
+#define GROW(old) ((old) * 3 / 2)
+#else
+#define GROW(old) ((old) + 1)
+#endif
+
+PERL_SI *
+new_stackinfo(I32 stitems, I32 cxitems)
+{
+ PERL_SI *si;
+ PERL_CONTEXT *cxt;
+ New(56, si, 1, PERL_SI);
+ si->si_stack = newAV();
+ AvREAL_off(si->si_stack);
+ av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
+ AvALLOC(si->si_stack)[0] = &PL_sv_undef;
+ AvFILLp(si->si_stack) = 0;
+ si->si_prev = 0;
+ si->si_next = 0;
+ si->si_cxmax = cxitems - 1;
+ si->si_cxix = -1;
+ si->si_type = PERLSI_UNDEF;
+ New(56, si->si_cxstack, cxitems, PERL_CONTEXT);
+ return si;
+}
+
+I32
+cxinc(void)
+{
+ dTHR;
+ cxstack_max = GROW(cxstack_max);
+ Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
+ return cxstack_ix + 1;
+}
+
+void
+push_return(OP *retop)
+{
+ dTHR;
+ if (PL_retstack_ix == PL_retstack_max) {
+ PL_retstack_max = GROW(PL_retstack_max);
+ Renew(PL_retstack, PL_retstack_max, OP*);
+ }
+ PL_retstack[PL_retstack_ix++] = retop;
+}
+
+OP *
+pop_return(void)
+{
+ dTHR;
+ if (PL_retstack_ix > 0)
+ return PL_retstack[--PL_retstack_ix];
+ else
+ return Nullop;
+}
+
+void
+push_scope(void)
+{
+ dTHR;
+ if (PL_scopestack_ix == PL_scopestack_max) {
+ PL_scopestack_max = GROW(PL_scopestack_max);
+ Renew(PL_scopestack, PL_scopestack_max, I32);
+ }
+ PL_scopestack[PL_scopestack_ix++] = PL_savestack_ix;
+
+}
+
+void
+pop_scope(void)
+{
+ dTHR;
+ I32 oldsave = PL_scopestack[--PL_scopestack_ix];
+ LEAVE_SCOPE(oldsave);
+}
+
+void
+markstack_grow(void)
+{
+ dTHR;
+ I32 oldmax = PL_markstack_max - PL_markstack;
+ I32 newmax = GROW(oldmax);
+
+ Renew(PL_markstack, newmax, I32);
+ PL_markstack_ptr = PL_markstack + oldmax;
+ PL_markstack_max = PL_markstack + newmax;
+}
+
+void
+savestack_grow(void)
+{
+ dTHR;
+ PL_savestack_max = GROW(PL_savestack_max) + 4;
+ Renew(PL_savestack, PL_savestack_max, ANY);
+}
+
+#undef GROW
+
+void
+free_tmps(void)
+{
+ dTHR;
+ /* XXX should tmps_floor live in cxstack? */
+ I32 myfloor = PL_tmps_floor;
+ while (PL_tmps_ix > myfloor) { /* clean up after last statement */
+ SV* sv = PL_tmps_stack[PL_tmps_ix];
+ PL_tmps_stack[PL_tmps_ix--] = Nullsv;
+ if (sv) {
+#ifdef DEBUGGING
+ SvTEMP_off(sv);
+#endif
+ SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
+ }
+ }
+}
+
+STATIC SV *
+save_scalar_at(SV **sptr)
+{
+ dTHR;
+ register SV *sv;
+ SV *osv = *sptr;
+
+ sv = *sptr = NEWSV(0,0);
+ if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
+ sv_upgrade(sv, SvTYPE(osv));
+ if (SvGMAGICAL(osv)) {
+ MAGIC* mg;
+ bool oldtainted = PL_tainted;
+ mg_get(osv);
+ if (PL_tainting && PL_tainted && (mg = mg_find(osv, 't'))) {
+ SAVESPTR(mg->mg_obj);
+ mg->mg_obj = osv;
+ }
+ SvFLAGS(osv) |= (SvFLAGS(osv) &
+ (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ PL_tainted = oldtainted;
+ }
+ SvMAGIC(sv) = SvMAGIC(osv);
+ SvFLAGS(sv) |= SvMAGICAL(osv);
+ PL_localizing = 1;
+ SvSETMAGIC(sv);
+ PL_localizing = 0;
+ }
+ return sv;
+}
+
+SV *
+save_scalar(GV *gv)
+{
+ dTHR;
+ SV **sptr = &GvSV(gv);
+ SSCHECK(3);
+ SSPUSHPTR(SvREFCNT_inc(gv));
+ SSPUSHPTR(SvREFCNT_inc(*sptr));
+ SSPUSHINT(SAVEt_SV);
+ return save_scalar_at(sptr);
+}
+
+SV*
+save_svref(SV **sptr)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHPTR(sptr);
+ SSPUSHPTR(SvREFCNT_inc(*sptr));
+ SSPUSHINT(SAVEt_SVREF);
+ return save_scalar_at(sptr);
+}
+
+void
+save_gp(GV *gv, I32 empty)
+{
+ dTHR;
+ SSCHECK(6);
+ SSPUSHIV((IV)SvLEN(gv));
+ SvLEN(gv) = 0; /* forget that anything was allocated here */
+ SSPUSHIV((IV)SvCUR(gv));
+ SSPUSHPTR(SvPVX(gv));
+ SvPOK_off(gv);
+ SSPUSHPTR(SvREFCNT_inc(gv));
+ SSPUSHPTR(GvGP(gv));
+ SSPUSHINT(SAVEt_GP);
+
+ if (empty) {
+ register GP *gp;
+
+ if (GvCVu(gv))
+ PL_sub_generation++; /* taking a method out of circulation */
+ Newz(602, gp, 1, GP);
+ GvGP(gv) = gp_ref(gp);
+ GvSV(gv) = NEWSV(72,0);
+ GvLINE(gv) = PL_curcop->cop_line;
+ GvEGV(gv) = gv;
+ }
+ else {
+ gp_ref(GvGP(gv));
+ GvINTRO_on(gv);
+ }
+}
+
+AV *
+save_ary(GV *gv)
+{
+ dTHR;
+ AV *oav = GvAVn(gv);
+ AV *av;
+
+ if (!AvREAL(oav) && AvREIFY(oav))
+ av_reify(oav);
+ SSCHECK(3);
+ SSPUSHPTR(gv);
+ SSPUSHPTR(oav);
+ SSPUSHINT(SAVEt_AV);
+
+ GvAV(gv) = Null(AV*);
+ av = GvAVn(gv);
+ if (SvMAGIC(oav)) {
+ SvMAGIC(av) = SvMAGIC(oav);
+ SvFLAGS(av) |= SvMAGICAL(oav);
+ SvMAGICAL_off(oav);
+ SvMAGIC(oav) = 0;
+ PL_localizing = 1;
+ SvSETMAGIC((SV*)av);
+ PL_localizing = 0;
+ }
+ return av;
+}
+
+HV *
+save_hash(GV *gv)
+{
+ dTHR;
+ HV *ohv, *hv;
+
+ SSCHECK(3);
+ SSPUSHPTR(gv);
+ SSPUSHPTR(ohv = GvHVn(gv));
+ SSPUSHINT(SAVEt_HV);
+
+ GvHV(gv) = Null(HV*);
+ hv = GvHVn(gv);
+ if (SvMAGIC(ohv)) {
+ SvMAGIC(hv) = SvMAGIC(ohv);
+ SvFLAGS(hv) |= SvMAGICAL(ohv);
+ SvMAGICAL_off(ohv);
+ SvMAGIC(ohv) = 0;
+ PL_localizing = 1;
+ SvSETMAGIC((SV*)hv);
+ PL_localizing = 0;
+ }
+ return hv;
+}
+
+void
+save_item(register SV *item)
+{
+ dTHR;
+ register SV *sv = NEWSV(0,0);
+
+ sv_setsv(sv,item);
+ SSCHECK(3);
+ SSPUSHPTR(item); /* remember the pointer */
+ SSPUSHPTR(sv); /* remember the value */
+ SSPUSHINT(SAVEt_ITEM);
+}
+
+void
+save_int(int *intp)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHINT(*intp);
+ SSPUSHPTR(intp);
+ SSPUSHINT(SAVEt_INT);
+}
+
+void
+save_long(long int *longp)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHLONG(*longp);
+ SSPUSHPTR(longp);
+ SSPUSHINT(SAVEt_LONG);
+}
+
+void
+save_I32(I32 *intp)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHINT(*intp);
+ SSPUSHPTR(intp);
+ SSPUSHINT(SAVEt_I32);
+}
+
+void
+save_I16(I16 *intp)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHINT(*intp);
+ SSPUSHPTR(intp);
+ SSPUSHINT(SAVEt_I16);
+}
+
+void
+save_iv(IV *ivp)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHIV(*ivp);
+ SSPUSHPTR(ivp);
+ SSPUSHINT(SAVEt_IV);
+}
+
+/* Cannot use save_sptr() to store a char* since the SV** cast will
+ * force word-alignment and we'll miss the pointer.
+ */
+void
+save_pptr(char **pptr)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHPTR(*pptr);
+ SSPUSHPTR(pptr);
+ SSPUSHINT(SAVEt_PPTR);
+}
+
+void
+save_sptr(SV **sptr)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHPTR(*sptr);
+ SSPUSHPTR(sptr);
+ SSPUSHINT(SAVEt_SPTR);
+}
+
+SV **
+save_threadsv(PADOFFSET i)
+{
+#ifdef USE_THREADS
+ dTHR;
+ SV **svp = &THREADSV(i); /* XXX Change to save by offset */
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(), "save_threadsv %u: %p %p:%s\n",
+ i, svp, *svp, SvPEEK(*svp)));
+ save_svref(svp);
+ return svp;
+#else
+ croak("panic: save_threadsv called in non-threaded perl");
+ return 0;
+#endif /* USE_THREADS */
+}
+
+void
+save_nogv(GV *gv)
+{
+ dTHR;
+ SSCHECK(2);
+ SSPUSHPTR(gv);
+ SSPUSHINT(SAVEt_NSTAB);
+}
+
+void
+save_hptr(HV **hptr)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHPTR(*hptr);
+ SSPUSHPTR(hptr);
+ SSPUSHINT(SAVEt_HPTR);
+}
+
+void
+save_aptr(AV **aptr)
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHPTR(*aptr);
+ SSPUSHPTR(aptr);
+ SSPUSHINT(SAVEt_APTR);
+}
+
+void
+save_freesv(SV *sv)
+{
+ dTHR;
+ SSCHECK(2);
+ SSPUSHPTR(sv);
+ SSPUSHINT(SAVEt_FREESV);
+}
+
+void
+save_freeop(OP *o)
+{
+ dTHR;
+ SSCHECK(2);
+ SSPUSHPTR(o);
+ SSPUSHINT(SAVEt_FREEOP);
+}
+
+void
+save_freepv(char *pv)
+{
+ dTHR;
+ SSCHECK(2);
+ SSPUSHPTR(pv);
+ SSPUSHINT(SAVEt_FREEPV);
+}
+
+void
+save_clearsv(SV **svp)
+{
+ dTHR;
+ SSCHECK(2);
+ SSPUSHLONG((long)(svp-PL_curpad));
+ SSPUSHINT(SAVEt_CLEARSV);
+}
+
+void
+save_delete(HV *hv, char *key, I32 klen)
+{
+ dTHR;
+ SSCHECK(4);
+ SSPUSHINT(klen);
+ SSPUSHPTR(key);
+ SSPUSHPTR(SvREFCNT_inc(hv));
+ SSPUSHINT(SAVEt_DELETE);
+}
+
+void
+save_list(register SV **sarg, I32 maxsarg)
+{
+ dTHR;
+ register SV *sv;
+ register I32 i;
+
+ for (i = 1; i <= maxsarg; i++) {
+ sv = NEWSV(0,0);
+ sv_setsv(sv,sarg[i]);
+ SSCHECK(3);
+ SSPUSHPTR(sarg[i]); /* remember the pointer */
+ SSPUSHPTR(sv); /* remember the value */
+ SSPUSHINT(SAVEt_ITEM);
+ }
+}
+
+void
+#ifdef PERL_OBJECT
+save_destructor(DESTRUCTORFUNC f, void* p)
+#else
+save_destructor(void (*f) (void *), void *p)
+#endif
+{
+ dTHR;
+ SSCHECK(3);
+ SSPUSHDPTR(f);
+ SSPUSHPTR(p);
+ SSPUSHINT(SAVEt_DESTRUCTOR);
+}
+
+void
+save_aelem(AV *av, I32 idx, SV **sptr)
+{
+ dTHR;
+ SSCHECK(4);
+ SSPUSHPTR(SvREFCNT_inc(av));
+ SSPUSHINT(idx);
+ SSPUSHPTR(SvREFCNT_inc(*sptr));
+ SSPUSHINT(SAVEt_AELEM);
+ save_scalar_at(sptr);
+}
+
+void
+save_helem(HV *hv, SV *key, SV **sptr)
+{
+ dTHR;
+ SSCHECK(4);
+ SSPUSHPTR(SvREFCNT_inc(hv));
+ SSPUSHPTR(SvREFCNT_inc(key));
+ SSPUSHPTR(SvREFCNT_inc(*sptr));
+ SSPUSHINT(SAVEt_HELEM);
+ save_scalar_at(sptr);
+}
+
+void
+save_op(void)
+{
+ dTHR;
+ SSCHECK(2);
+ SSPUSHPTR(PL_op);
+ SSPUSHINT(SAVEt_OP);
+}
+
+void
+leave_scope(I32 base)
+{
+ dTHR;
+ register SV *sv;
+ register SV *value;
+ register GV *gv;
+ register AV *av;
+ register HV *hv;
+ register void* ptr;
+ I32 i;
+
+ if (base < -1)
+ croak("panic: corrupt saved stack index");
+ while (PL_savestack_ix > base) {
+ switch (SSPOPINT) {
+ case SAVEt_ITEM: /* normal string */
+ value = (SV*)SSPOPPTR;
+ sv = (SV*)SSPOPPTR;
+ sv_replace(sv,value);
+ PL_localizing = 2;
+ SvSETMAGIC(sv);
+ PL_localizing = 0;
+ break;
+ case SAVEt_SV: /* scalar reference */
+ value = (SV*)SSPOPPTR;
+ gv = (GV*)SSPOPPTR;
+ ptr = &GvSV(gv);
+ SvREFCNT_dec(gv);
+ goto restore_sv;
+ case SAVEt_SVREF: /* scalar reference */
+ value = (SV*)SSPOPPTR;
+ ptr = SSPOPPTR;
+ restore_sv:
+ sv = *(SV**)ptr;
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(),
+ "restore svref: %p %p:%s -> %p:%s\n",
+ ptr, sv, SvPEEK(sv), value, SvPEEK(value)));
+ if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
+ SvTYPE(sv) != SVt_PVGV)
+ {
+ (void)SvUPGRADE(value, SvTYPE(sv));
+ SvMAGIC(value) = SvMAGIC(sv);
+ SvFLAGS(value) |= SvMAGICAL(sv);
+ SvMAGICAL_off(sv);
+ SvMAGIC(sv) = 0;
+ }
+ else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
+ SvTYPE(value) != SVt_PVGV)
+ {
+ SvFLAGS(value) |= (SvFLAGS(value) &
+ (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ SvMAGICAL_off(value);
+ SvMAGIC(value) = 0;
+ }
+ SvREFCNT_dec(sv);
+ *(SV**)ptr = value;
+ PL_localizing = 2;
+ SvSETMAGIC(value);
+ PL_localizing = 0;
+ SvREFCNT_dec(value);
+ break;
+ case SAVEt_AV: /* array reference */
+ av = (AV*)SSPOPPTR;
+ gv = (GV*)SSPOPPTR;
+ if (GvAV(gv)) {
+ AV *goner = GvAV(gv);
+ SvMAGIC(av) = SvMAGIC(goner);
+ SvFLAGS(av) |= SvMAGICAL(goner);
+ SvMAGICAL_off(goner);
+ SvMAGIC(goner) = 0;
+ SvREFCNT_dec(goner);
+ }
+ GvAV(gv) = av;
+ if (SvMAGICAL(av)) {
+ PL_localizing = 2;
+ SvSETMAGIC((SV*)av);
+ PL_localizing = 0;
+ }
+ break;
+ case SAVEt_HV: /* hash reference */
+ hv = (HV*)SSPOPPTR;
+ gv = (GV*)SSPOPPTR;
+ if (GvHV(gv)) {
+ HV *goner = GvHV(gv);
+ SvMAGIC(hv) = SvMAGIC(goner);
+ SvFLAGS(hv) |= SvMAGICAL(goner);
+ SvMAGICAL_off(goner);
+ SvMAGIC(goner) = 0;
+ SvREFCNT_dec(goner);
+ }
+ GvHV(gv) = hv;
+ if (SvMAGICAL(hv)) {
+ PL_localizing = 2;
+ SvSETMAGIC((SV*)hv);
+ PL_localizing = 0;
+ }
+ break;
+ case SAVEt_INT: /* int reference */
+ ptr = SSPOPPTR;
+ *(int*)ptr = (int)SSPOPINT;
+ break;
+ case SAVEt_LONG: /* long reference */
+ ptr = SSPOPPTR;
+ *(long*)ptr = (long)SSPOPLONG;
+ break;
+ case SAVEt_I32: /* I32 reference */
+ ptr = SSPOPPTR;
+ *(I32*)ptr = (I32)SSPOPINT;
+ break;
+ case SAVEt_I16: /* I16 reference */
+ ptr = SSPOPPTR;
+ *(I16*)ptr = (I16)SSPOPINT;
+ break;
+ case SAVEt_IV: /* IV reference */
+ ptr = SSPOPPTR;
+ *(IV*)ptr = (IV)SSPOPIV;
+ break;
+ case SAVEt_SPTR: /* SV* reference */
+ ptr = SSPOPPTR;
+ *(SV**)ptr = (SV*)SSPOPPTR;
+ break;
+ case SAVEt_PPTR: /* char* reference */
+ ptr = SSPOPPTR;
+ *(char**)ptr = (char*)SSPOPPTR;
+ break;
+ case SAVEt_HPTR: /* HV* reference */
+ ptr = SSPOPPTR;
+ *(HV**)ptr = (HV*)SSPOPPTR;
+ break;
+ case SAVEt_APTR: /* AV* reference */
+ ptr = SSPOPPTR;
+ *(AV**)ptr = (AV*)SSPOPPTR;
+ break;
+ case SAVEt_NSTAB:
+ gv = (GV*)SSPOPPTR;
+ (void)sv_clear((SV*)gv);
+ break;
+ case SAVEt_GP: /* scalar reference */
+ ptr = SSPOPPTR;
+ gv = (GV*)SSPOPPTR;
+ if (SvPVX(gv) && SvLEN(gv) > 0) {
+ Safefree(SvPVX(gv));
+ }
+ SvPVX(gv) = (char *)SSPOPPTR;
+ SvCUR(gv) = (STRLEN)SSPOPIV;
+ SvLEN(gv) = (STRLEN)SSPOPIV;
+ gp_free(gv);
+ GvGP(gv) = (GP*)ptr;
+ if (GvCVu(gv))
+ PL_sub_generation++; /* putting a method back into circulation */
+ SvREFCNT_dec(gv);
+ break;
+ case SAVEt_FREESV:
+ ptr = SSPOPPTR;
+ SvREFCNT_dec((SV*)ptr);
+ break;
+ case SAVEt_FREEOP:
+ ptr = SSPOPPTR;
+ if (PL_comppad)
+ PL_curpad = AvARRAY(PL_comppad);
+ op_free((OP*)ptr);
+ break;
+ case SAVEt_FREEPV:
+ ptr = SSPOPPTR;
+ Safefree((char*)ptr);
+ break;
+ case SAVEt_CLEARSV:
+ ptr = (void*)&PL_curpad[SSPOPLONG];
+ sv = *(SV**)ptr;
+ /* Can clear pad variable in place? */
+ if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
+ if (SvTHINKFIRST(sv)) {
+ if (SvREADONLY(sv))
+ croak("panic: leave_scope clearsv");
+ if (SvROK(sv))
+ sv_unref(sv);
+ }
+ if (SvMAGICAL(sv))
+ mg_free(sv);
+
+ switch (SvTYPE(sv)) {
+ case SVt_NULL:
+ break;
+ case SVt_PVAV:
+ av_clear((AV*)sv);
+ break;
+ case SVt_PVHV:
+ hv_clear((HV*)sv);
+ break;
+ case SVt_PVCV:
+ croak("panic: leave_scope pad code");
+ case SVt_RV:
+ case SVt_IV:
+ case SVt_NV:
+ (void)SvOK_off(sv);
+ break;
+ default:
+ (void)SvOK_off(sv);
+ (void)SvOOK_off(sv);
+ break;
+ }
+ }
+ else { /* Someone has a claim on this, so abandon it. */
+ U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
+ switch (SvTYPE(sv)) { /* Console ourselves with a new value */
+ case SVt_PVAV: *(SV**)ptr = (SV*)newAV(); break;
+ case SVt_PVHV: *(SV**)ptr = (SV*)newHV(); break;
+ default: *(SV**)ptr = NEWSV(0,0); break;
+ }
+ SvREFCNT_dec(sv); /* Cast current value to the winds. */
+ SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
+ }
+ break;
+ case SAVEt_DELETE:
+ ptr = SSPOPPTR;
+ hv = (HV*)ptr;
+ ptr = SSPOPPTR;
+ (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
+ SvREFCNT_dec(hv);
+ Safefree(ptr);
+ break;
+ case SAVEt_DESTRUCTOR:
+ ptr = SSPOPPTR;
+ (CALLDESTRUCTOR)(ptr);
+ break;
+ case SAVEt_REGCONTEXT:
+ i = SSPOPINT;
+ PL_savestack_ix -= i; /* regexp must have croaked */
+ break;
+ case SAVEt_STACK_POS: /* Position on Perl stack */
+ i = SSPOPINT;
+ PL_stack_sp = PL_stack_base + i;
+ break;
+ case SAVEt_AELEM: /* array element */
+ value = (SV*)SSPOPPTR;
+ i = SSPOPINT;
+ av = (AV*)SSPOPPTR;
+ ptr = av_fetch(av,i,1);
+ if (ptr) {
+ sv = *(SV**)ptr;
+ if (sv && sv != &PL_sv_undef) {
+ if (SvRMAGICAL(av) && mg_find((SV*)av, 'P'))
+ (void)SvREFCNT_inc(sv);
+ SvREFCNT_dec(av);
+ goto restore_sv;
+ }
+ }
+ SvREFCNT_dec(av);
+ SvREFCNT_dec(value);
+ break;
+ case SAVEt_HELEM: /* hash element */
+ value = (SV*)SSPOPPTR;
+ sv = (SV*)SSPOPPTR;
+ hv = (HV*)SSPOPPTR;
+ ptr = hv_fetch_ent(hv, sv, 1, 0);
+ if (ptr) {
+ SV *oval = HeVAL((HE*)ptr);
+ if (oval && oval != &PL_sv_undef) {
+ ptr = &HeVAL((HE*)ptr);
+ if (SvRMAGICAL(hv) && mg_find((SV*)hv, 'P'))
+ (void)SvREFCNT_inc(*(SV**)ptr);
+ SvREFCNT_dec(hv);
+ SvREFCNT_dec(sv);
+ goto restore_sv;
+ }
+ }
+ SvREFCNT_dec(hv);
+ SvREFCNT_dec(sv);
+ SvREFCNT_dec(value);
+ break;
+ case SAVEt_OP:
+ PL_op = (OP*)SSPOPPTR;
+ break;
+ case SAVEt_HINTS:
+ if (GvHV(PL_hintgv)) {
+ SvREFCNT_dec((SV*)GvHV(PL_hintgv));
+ GvHV(PL_hintgv) = NULL;
+ }
+ *(I32*)&PL_hints = (I32)SSPOPINT;
+ break;
+ default:
+ croak("panic: leave_scope inconsistency");
+ }
+ }
+}
+
+void
+cx_dump(PERL_CONTEXT *cx)
+{
+#ifdef DEBUGGING
+ dTHR;
+ PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), block_type[cx->cx_type]);
+ if (cx->cx_type != CXt_SUBST) {
+ PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
+ PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
+ PerlIO_printf(Perl_debug_log, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
+ PerlIO_printf(Perl_debug_log, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
+ PerlIO_printf(Perl_debug_log, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
+ PerlIO_printf(Perl_debug_log, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
+ PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
+ }
+ switch (cx->cx_type) {
+ case CXt_NULL:
+ case CXt_BLOCK:
+ break;
+ case CXt_SUB:
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
+ (long)cx->blk_sub.cv);
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
+ (long)cx->blk_sub.gv);
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
+ (long)cx->blk_sub.dfoutgv);
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
+ (long)cx->blk_sub.olddepth);
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
+ (int)cx->blk_sub.hasargs);
+ break;
+ case CXt_EVAL:
+ PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
+ (long)cx->blk_eval.old_in_eval);
+ PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_OP_TYPE = %s (%s)\n",
+ op_name[cx->blk_eval.old_op_type],
+ op_desc[cx->blk_eval.old_op_type]);
+ PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
+ cx->blk_eval.old_name);
+ PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
+ (long)cx->blk_eval.old_eval_root);
+ break;
+
+ case CXt_LOOP:
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
+ cx->blk_loop.label);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
+ (long)cx->blk_loop.resetsp);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
+ (long)cx->blk_loop.redo_op);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
+ (long)cx->blk_loop.next_op);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
+ (long)cx->blk_loop.last_op);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
+ (long)cx->blk_loop.iterix);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
+ (long)cx->blk_loop.iterary);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
+ (long)cx->blk_loop.itervar);
+ if (cx->blk_loop.itervar)
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERSAVE = 0x%lx\n",
+ (long)cx->blk_loop.itersave);
+ PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERLVAL = 0x%lx\n",
+ (long)cx->blk_loop.iterlval);
+ break;
+
+ case CXt_SUBST:
+ PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
+ (long)cx->sb_iters);
+ PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
+ (long)cx->sb_maxiters);
+ PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
+ (long)cx->sb_safebase);
+ PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
+ (long)cx->sb_once);
+ PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
+ cx->sb_orig);
+ PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
+ (long)cx->sb_dstr);
+ PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
+ (long)cx->sb_targ);
+ PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
+ (long)cx->sb_s);
+ PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
+ (long)cx->sb_m);
+ PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
+ (long)cx->sb_strend);
+ PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%lx\n",
+ (long)cx->sb_rxres);
+ break;
+ }
+#endif /* DEBUGGING */
+}
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