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scope.c
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/* scope.c
*
* Copyright (c) 1991-2000, 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"
#define PERL_IN_SCOPE_C
#include "perl.h"
#if defined(PERL_FLEXIBLE_EXCEPTIONS)
void *
Perl_default_protect(pTHX_ volatile JMPENV *pcur_env, int *excpt,
protect_body_t body, ...)
{
void *ret;
va_list args;
va_start(args, body);
ret = vdefault_protect(pcur_env, excpt, body, &args);
va_end(args);
return ret;
}
void *
Perl_vdefault_protect(pTHX_ volatile JMPENV *pcur_env, int *excpt,
protect_body_t body, va_list *args)
{
dTHR;
int ex;
void *ret;
JMPENV_PUSH(ex);
if (ex)
ret = NULL;
else
ret = CALL_FPTR(body)(aTHX_ *args);
*excpt = ex;
JMPENV_POP;
return ret;
}
#endif
SV**
Perl_stack_grow(pTHX_ 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 *
Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
{
PERL_SI *si;
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
Perl_cxinc(pTHX)
{
dTHR;
cxstack_max = GROW(cxstack_max);
Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
return cxstack_ix + 1;
}
void
Perl_push_return(pTHX_ 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 *
Perl_pop_return(pTHX)
{
dTHR;
if (PL_retstack_ix > 0)
return PL_retstack[--PL_retstack_ix];
else
return Nullop;
}
void
Perl_push_scope(pTHX)
{
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
Perl_pop_scope(pTHX)
{
dTHR;
I32 oldsave = PL_scopestack[--PL_scopestack_ix];
LEAVE_SCOPE(oldsave);
}
void
Perl_markstack_grow(pTHX)
{
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
Perl_savestack_grow(pTHX)
{
dTHR;
PL_savestack_max = GROW(PL_savestack_max) + 4;
Renew(PL_savestack, PL_savestack_max, ANY);
}
#undef GROW
void
Perl_tmps_grow(pTHX_ I32 n)
{
dTHR;
#ifndef STRESS_REALLOC
if (n < 128)
n = (PL_tmps_max < 512) ? 128 : 512;
#endif
PL_tmps_max = PL_tmps_ix + n + 1;
Renew(PL_tmps_stack, PL_tmps_max, SV*);
}
void
Perl_free_tmps(pTHX)
{
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) {
SvTEMP_off(sv);
SvREFCNT_dec(sv); /* note, can modify tmps_ix!!! */
}
}
}
STATIC SV *
S_save_scalar_at(pTHX_ 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 *
Perl_save_scalar(pTHX_ 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*
Perl_save_svref(pTHX_ SV **sptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(sptr);
SSPUSHPTR(SvREFCNT_inc(*sptr));
SSPUSHINT(SAVEt_SVREF);
return save_scalar_at(sptr);
}
/* Like save_sptr(), but also SvREFCNT_dec()s the new value. Can be used to
* restore a global SV to its prior contents, freeing new value. */
void
Perl_save_generic_svref(pTHX_ SV **sptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(sptr);
SSPUSHPTR(SvREFCNT_inc(*sptr));
SSPUSHINT(SAVEt_GENERIC_SVREF);
}
/* Like save_pptr(), but also Safefree()s the new value if it is different
* from the old one. Can be used to restore a global char* to its prior
* contents, freeing new value. */
void
Perl_save_generic_pvref(pTHX_ char **str)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(str);
SSPUSHPTR(*str);
SSPUSHINT(SAVEt_GENERIC_PVREF);
}
void
Perl_save_gp(pTHX_ 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;
Newz(602, gp, 1, GP);
if (GvCVu(gv))
PL_sub_generation++; /* taking a method out of circulation */
if (GvIOp(gv) && (IoFLAGS(GvIOp(gv)) & IOf_ARGV)) {
gp->gp_io = newIO();
IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
}
GvGP(gv) = gp_ref(gp);
GvSV(gv) = NEWSV(72,0);
GvLINE(gv) = CopLINE(PL_curcop);
GvEGV(gv) = gv;
}
else {
gp_ref(GvGP(gv));
GvINTRO_on(gv);
}
}
AV *
Perl_save_ary(pTHX_ 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((SV*)av) |= SvMAGICAL(oav);
SvMAGICAL_off(oav);
SvMAGIC(oav) = 0;
PL_localizing = 1;
SvSETMAGIC((SV*)av);
PL_localizing = 0;
}
return av;
}
HV *
Perl_save_hash(pTHX_ 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((SV*)hv) |= SvMAGICAL(ohv);
SvMAGICAL_off(ohv);
SvMAGIC(ohv) = 0;
PL_localizing = 1;
SvSETMAGIC((SV*)hv);
PL_localizing = 0;
}
return hv;
}
void
Perl_save_item(pTHX_ 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
Perl_save_int(pTHX_ int *intp)
{
dTHR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
SSPUSHINT(SAVEt_INT);
}
void
Perl_save_long(pTHX_ long int *longp)
{
dTHR;
SSCHECK(3);
SSPUSHLONG(*longp);
SSPUSHPTR(longp);
SSPUSHINT(SAVEt_LONG);
}
void
Perl_save_I32(pTHX_ I32 *intp)
{
dTHR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
SSPUSHINT(SAVEt_I32);
}
void
Perl_save_I16(pTHX_ I16 *intp)
{
dTHR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
SSPUSHINT(SAVEt_I16);
}
void
Perl_save_I8(pTHX_ I8 *bytep)
{
dTHR;
SSCHECK(3);
SSPUSHINT(*bytep);
SSPUSHPTR(bytep);
SSPUSHINT(SAVEt_I8);
}
void
Perl_save_iv(pTHX_ 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
Perl_save_pptr(pTHX_ char **pptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(*pptr);
SSPUSHPTR(pptr);
SSPUSHINT(SAVEt_PPTR);
}
void
Perl_save_vptr(pTHX_ void *ptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(*(char**)ptr);
SSPUSHPTR(ptr);
SSPUSHINT(SAVEt_VPTR);
}
void
Perl_save_sptr(pTHX_ SV **sptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(*sptr);
SSPUSHPTR(sptr);
SSPUSHINT(SAVEt_SPTR);
}
SV **
Perl_save_threadsv(pTHX_ PADOFFSET i)
{
#ifdef USE_THREADS
dTHR;
SV **svp = &THREADSV(i); /* XXX Change to save by offset */
DEBUG_S(PerlIO_printf(Perl_debug_log, "save_threadsv %"UVuf": %p %p:%s\n",
(UV)i, svp, *svp, SvPEEK(*svp)));
save_svref(svp);
return svp;
#else
Perl_croak(aTHX_ "panic: save_threadsv called in non-threaded perl");
return 0;
#endif /* USE_THREADS */
}
void
Perl_save_nogv(pTHX_ GV *gv)
{
dTHR;
SSCHECK(2);
SSPUSHPTR(gv);
SSPUSHINT(SAVEt_NSTAB);
}
void
Perl_save_hptr(pTHX_ HV **hptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(*hptr);
SSPUSHPTR(hptr);
SSPUSHINT(SAVEt_HPTR);
}
void
Perl_save_aptr(pTHX_ AV **aptr)
{
dTHR;
SSCHECK(3);
SSPUSHPTR(*aptr);
SSPUSHPTR(aptr);
SSPUSHINT(SAVEt_APTR);
}
void
Perl_save_freesv(pTHX_ SV *sv)
{
dTHR;
SSCHECK(2);
SSPUSHPTR(sv);
SSPUSHINT(SAVEt_FREESV);
}
void
Perl_save_freeop(pTHX_ OP *o)
{
dTHR;
SSCHECK(2);
SSPUSHPTR(o);
SSPUSHINT(SAVEt_FREEOP);
}
void
Perl_save_freepv(pTHX_ char *pv)
{
dTHR;
SSCHECK(2);
SSPUSHPTR(pv);
SSPUSHINT(SAVEt_FREEPV);
}
void
Perl_save_clearsv(pTHX_ SV **svp)
{
dTHR;
SSCHECK(2);
SSPUSHLONG((long)(svp-PL_curpad));
SSPUSHINT(SAVEt_CLEARSV);
}
void
Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
{
dTHR;
SSCHECK(4);
SSPUSHINT(klen);
SSPUSHPTR(key);
SSPUSHPTR(SvREFCNT_inc(hv));
SSPUSHINT(SAVEt_DELETE);
}
void
Perl_save_list(pTHX_ 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
Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
{
dTHR;
SSCHECK(3);
SSPUSHDPTR(f);
SSPUSHPTR(p);
SSPUSHINT(SAVEt_DESTRUCTOR);
}
void
Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
{
dTHR;
SSCHECK(3);
SSPUSHDXPTR(f);
SSPUSHPTR(p);
SSPUSHINT(SAVEt_DESTRUCTOR_X);
}
void
Perl_save_aelem(pTHX_ 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
Perl_save_helem(pTHX_ 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
Perl_save_op(pTHX)
{
dTHR;
SSCHECK(2);
SSPUSHPTR(PL_op);
SSPUSHINT(SAVEt_OP);
}
I32
Perl_save_alloc(pTHX_ I32 size, I32 pad)
{
dTHR;
register I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
- (char*)PL_savestack);
register I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
/* SSCHECK may not be good enough */
while (PL_savestack_ix + elems + 2 > PL_savestack_max)
savestack_grow();
PL_savestack_ix += elems;
SSPUSHINT(elems);
SSPUSHINT(SAVEt_ALLOC);
return start;
}
void
Perl_leave_scope(pTHX_ I32 base)
{
dTHR;
register SV *sv;
register SV *value;
register GV *gv;
register AV *av;
register HV *hv;
register void* ptr;
register char* str;
I32 i;
if (base < -1)
Perl_croak(aTHX_ "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_GENERIC_PVREF: /* generic pv */
str = (char*)SSPOPPTR;
ptr = SSPOPPTR;
if (*(char**)ptr != str) {
Safefree(*(char**)ptr);
*(char**)ptr = str;
}
break;
case SAVEt_GENERIC_SVREF: /* generic sv */
value = (SV*)SSPOPPTR;
ptr = SSPOPPTR;
sv = *(SV**)ptr;
*(SV**)ptr = value;
SvREFCNT_dec(sv);
SvREFCNT_dec(value);
break;
case SAVEt_SVREF: /* scalar reference */
value = (SV*)SSPOPPTR;
ptr = SSPOPPTR;
restore_sv:
sv = *(SV**)ptr;
DEBUG_S(PerlIO_printf(Perl_debug_log,
"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((SV*)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_I8: /* I8 reference */
ptr = SSPOPPTR;
*(I8*)ptr = (I8)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_VPTR: /* random* reference */
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))
sv_force_normal(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:
Perl_croak(aTHX_ "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;
(*SSPOPDPTR)(ptr);
break;
case SAVEt_DESTRUCTOR_X:
ptr = SSPOPPTR;
(*SSPOPDXPTR)(aTHXo_ ptr);
break;
case SAVEt_REGCONTEXT:
case SAVEt_ALLOC:
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 (SvTIED_mg((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 (SvTIED_mg((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;
case SAVEt_COMPPAD:
PL_comppad = (AV*)SSPOPPTR;
if (PL_comppad)
PL_curpad = AvARRAY(PL_comppad);
else
PL_curpad = Null(SV**);
break;
default:
Perl_croak(aTHX_ "panic: leave_scope inconsistency");
}
}
}
void
Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
{
#ifdef DEBUGGING
dTHR;
PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
if (CxTYPE(cx) != CXt_SUBST) {
PerlIO_printf(Perl_debug_log, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
PerlIO_printf(Perl_debug_log, "BLK_OLDCOP = 0x%"UVxf"\n",
PTR2UV(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%"UVxf"\n",
PTR2UV(cx->blk_oldpm));
PerlIO_printf(Perl_debug_log, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
}
switch (CxTYPE(cx)) {
case CXt_NULL:
case CXt_BLOCK:
break;
case CXt_FORMAT:
PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
PTR2UV(cx->blk_sub.cv));
PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%"UVxf"\n",
PTR2UV(cx->blk_sub.gv));
PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%"UVxf"\n",
PTR2UV(cx->blk_sub.dfoutgv));
PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
(int)cx->blk_sub.hasargs);
break;
case CXt_SUB: