/* scope.c
*
- * Copyright (c) 1991-2000, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 2004, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* levels..."
*/
+/* This file contains functions to manipulate several of Perl's stacks;
+ * in particular it contains code to push various types of things onto
+ * the savestack, then to pop them off and perform the correct restorative
+ * action for each one. This corresponds to the cleanup Perl does at
+ * each scope exit.
+ */
+
#include "EXTERN.h"
#define PERL_IN_SCOPE_C
#include "perl.h"
Perl_vdefault_protect(pTHX_ volatile JMPENV *pcur_env, int *excpt,
protect_body_t body, va_list *args)
{
- dTHR;
int ex;
void *ret;
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;
}
Perl_new_stackinfo(pTHX_ 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);
si->si_cxix = -1;
si->si_type = PERLSI_UNDEF;
New(56, si->si_cxstack, cxitems, PERL_CONTEXT);
+ /* Without any kind of initialising PUSHSUBST()
+ * in pp_subst() will read uninitialised heap. */
+ Poison(si->si_cxstack, cxitems, PERL_CONTEXT);
return si;
}
I32
Perl_cxinc(pTHX)
{
- dTHR;
+ IV old_max = cxstack_max;
cxstack_max = GROW(cxstack_max);
Renew(cxstack, cxstack_max + 1, PERL_CONTEXT); /* XXX should fix CXINC macro */
+ /* Without any kind of initialising deep enough recursion
+ * will end up reading uninitialised PERL_CONTEXTs. */
+ Poison(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
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);
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);
void
Perl_savestack_grow(pTHX)
{
- dTHR;
- PL_savestack_max = GROW(PL_savestack_max) + 4;
+ PL_savestack_max = GROW(PL_savestack_max) + 4;
+ Renew(PL_savestack, PL_savestack_max, ANY);
+}
+
+void
+Perl_savestack_grow_cnt(pTHX_ I32 need)
+{
+ PL_savestack_max = PL_savestack_ix + need;
Renew(PL_savestack, PL_savestack_max, ANY);
}
void
Perl_tmps_grow(pTHX_ I32 n)
{
- dTHR;
#ifndef STRESS_REALLOC
if (n < 128)
n = (PL_tmps_max < 512) ? 128 : 512;
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) {
+ if (sv && sv != &PL_sv_undef) {
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) {
+ MAGIC *mg;
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'))) {
+ mg_get(osv); /* note, can croak! */
+ if (PL_tainting && PL_tainted &&
+ (mg = mg_find(osv, PERL_MAGIC_taint))) {
SAVESPTR(mg->mg_obj);
mg->mg_obj = osv;
}
SvFLAGS(osv) |= (SvFLAGS(osv) &
- (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
PL_tainted = oldtainted;
}
SvMAGIC(sv) = SvMAGIC(osv);
+ /* if it's a special scalar or if it has no 'set' magic,
+ * propagate the SvREADONLY flag. --rgs 20030922 */
+ for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
+ if (mg->mg_type == '\0'
+ || !(mg->mg_virtual && mg->mg_virtual->svt_set))
+ {
+ SvFLAGS(sv) |= SvREADONLY(osv);
+ break;
+ }
+ }
SvFLAGS(sv) |= SvMAGICAL(osv);
+ /* XXX SvMAGIC() is *shared* between osv and sv. This can
+ * lead to coredumps when both SVs are destroyed without one
+ * of their SvMAGIC() slots being NULLed. */
PL_localizing = 1;
SvSETMAGIC(sv);
PL_localizing = 0;
SV *
Perl_save_scalar(pTHX_ GV *gv)
{
- dTHR;
SV **sptr = &GvSV(gv);
SSCHECK(3);
SSPUSHPTR(SvREFCNT_inc(gv));
SV*
Perl_save_svref(pTHX_ SV **sptr)
{
- dTHR;
SSCHECK(3);
SSPUSHPTR(sptr);
SSPUSHPTR(SvREFCNT_inc(*sptr));
return save_scalar_at(sptr);
}
-/* Like save_svref(), but doesn't deal with magic. Can be used to
+/* 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)
+{
+ SSCHECK(3);
+ SSPUSHPTR(str);
+ SSPUSHPTR(*str);
+ SSPUSHINT(SAVEt_GENERIC_PVREF);
+}
+
+/* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
+ * Can be used to restore a shared global char* to its prior
+ * contents, freeing new value. */
+void
+Perl_save_shared_pvref(pTHX_ char **str)
+{
+ SSCHECK(3);
+ SSPUSHPTR(str);
+ SSPUSHPTR(*str);
+ SSPUSHINT(SAVEt_SHARED_PVREF);
+}
+
+/* set the SvFLAGS specified by mask to the values in val */
+
+void
+Perl_save_set_svflags(pTHX_ SV* sv, U32 mask, U32 val)
+{
+ SSCHECK(4);
+ SSPUSHPTR(sv);
+ SSPUSHINT(mask);
+ SSPUSHINT(val);
+ SSPUSHINT(SAVEt_SET_SVFLAGS);
+}
+
void
Perl_save_gp(pTHX_ GV *gv, I32 empty)
{
- dTHR;
- SSCHECK(6);
+ SSGROW(6);
SSPUSHIV((IV)SvLEN(gv));
SvLEN(gv) = 0; /* forget that anything was allocated here */
SSPUSHIV((IV)SvCUR(gv));
GvGP(gv) = gp_ref(gp);
GvSV(gv) = NEWSV(72,0);
GvLINE(gv) = CopLINE(PL_curcop);
+ GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
GvEGV(gv) = gv;
}
else {
AV *
Perl_save_ary(pTHX_ GV *gv)
{
- dTHR;
AV *oav = GvAVn(gv);
AV *av;
av = GvAVn(gv);
if (SvMAGIC(oav)) {
SvMAGIC(av) = SvMAGIC(oav);
- SvFLAGS(av) |= SvMAGICAL(oav);
+ SvFLAGS((SV*)av) |= SvMAGICAL(oav);
SvMAGICAL_off(oav);
SvMAGIC(oav) = 0;
PL_localizing = 1;
HV *
Perl_save_hash(pTHX_ GV *gv)
{
- dTHR;
HV *ohv, *hv;
SSCHECK(3);
hv = GvHVn(gv);
if (SvMAGIC(ohv)) {
SvMAGIC(hv) = SvMAGIC(ohv);
- SvFLAGS(hv) |= SvMAGICAL(ohv);
+ SvFLAGS((SV*)hv) |= SvMAGICAL(ohv);
SvMAGICAL_off(ohv);
SvMAGIC(ohv) = 0;
PL_localizing = 1;
void
Perl_save_item(pTHX_ register SV *item)
{
- dTHR;
register SV *sv = NEWSV(0,0);
sv_setsv(sv,item);
void
Perl_save_int(pTHX_ int *intp)
{
- dTHR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
void
Perl_save_long(pTHX_ long int *longp)
{
- dTHR;
SSCHECK(3);
SSPUSHLONG(*longp);
SSPUSHPTR(longp);
}
void
+Perl_save_bool(pTHX_ bool *boolp)
+{
+ SSCHECK(3);
+ SSPUSHBOOL(*boolp);
+ SSPUSHPTR(boolp);
+ SSPUSHINT(SAVEt_BOOL);
+}
+
+void
Perl_save_I32(pTHX_ I32 *intp)
{
- dTHR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
void
Perl_save_I16(pTHX_ I16 *intp)
{
- dTHR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
void
Perl_save_I8(pTHX_ I8 *bytep)
{
- dTHR;
SSCHECK(3);
SSPUSHINT(*bytep);
SSPUSHPTR(bytep);
void
Perl_save_iv(pTHX_ IV *ivp)
{
- dTHR;
SSCHECK(3);
SSPUSHIV(*ivp);
SSPUSHPTR(ivp);
void
Perl_save_pptr(pTHX_ char **pptr)
{
- dTHR;
SSCHECK(3);
SSPUSHPTR(*pptr);
SSPUSHPTR(pptr);
void
Perl_save_vptr(pTHX_ void *ptr)
{
- dTHR;
SSCHECK(3);
SSPUSHPTR(*(char**)ptr);
SSPUSHPTR(ptr);
void
Perl_save_sptr(pTHX_ SV **sptr)
{
- dTHR;
SSCHECK(3);
SSPUSHPTR(*sptr);
SSPUSHPTR(sptr);
SSPUSHINT(SAVEt_SPTR);
}
+void
+Perl_save_padsv(pTHX_ PADOFFSET off)
+{
+ SSCHECK(4);
+ ASSERT_CURPAD_ACTIVE("save_padsv");
+ SSPUSHPTR(PL_curpad[off]);
+ SSPUSHPTR(PL_comppad);
+ SSPUSHLONG((long)off);
+ SSPUSHINT(SAVEt_PADSV);
+}
+
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);
void
Perl_save_aptr(pTHX_ AV **aptr)
{
- dTHR;
SSCHECK(3);
SSPUSHPTR(*aptr);
SSPUSHPTR(aptr);
void
Perl_save_freesv(pTHX_ SV *sv)
{
- dTHR;
SSCHECK(2);
SSPUSHPTR(sv);
SSPUSHINT(SAVEt_FREESV);
}
void
+Perl_save_mortalizesv(pTHX_ SV *sv)
+{
+ SSCHECK(2);
+ SSPUSHPTR(sv);
+ SSPUSHINT(SAVEt_MORTALIZESV);
+}
+
+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;
+ ASSERT_CURPAD_ACTIVE("save_clearsv");
SSCHECK(2);
SSPUSHLONG((long)(svp-PL_curpad));
SSPUSHINT(SAVEt_CLEARSV);
+ SvPADSTALE_off(*svp); /* mark lexical as active */
}
void
Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
{
- dTHR;
SSCHECK(4);
SSPUSHINT(klen);
SSPUSHPTR(key);
void
Perl_save_list(pTHX_ register SV **sarg, I32 maxsarg)
{
- dTHR;
register SV *sv;
register I32 i;
void
Perl_save_destructor(pTHX_ DESTRUCTORFUNC_NOCONTEXT_t f, void* p)
{
- dTHR;
SSCHECK(3);
SSPUSHDPTR(f);
SSPUSHPTR(p);
void
Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
{
- dTHR;
SSCHECK(3);
SSPUSHDXPTR(f);
SSPUSHPTR(p);
void
Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
{
- dTHR;
+ SV *sv;
SSCHECK(4);
SSPUSHPTR(SvREFCNT_inc(av));
SSPUSHINT(idx);
SSPUSHPTR(SvREFCNT_inc(*sptr));
SSPUSHINT(SAVEt_AELEM);
+ /* if it gets reified later, the restore will have the wrong refcnt */
+ if (!AvREAL(av) && AvREIFY(av))
+ SvREFCNT_inc(*sptr);
save_scalar_at(sptr);
+ sv = *sptr;
+ /* If we're localizing a tied array element, this new sv
+ * won't actually be stored in the array - so it won't get
+ * reaped when the localize ends. Ensure it gets reaped by
+ * mortifying it instead. DAPM */
+ if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
+ sv_2mortal(sv);
}
void
Perl_save_helem(pTHX_ HV *hv, SV *key, SV **sptr)
{
- dTHR;
+ SV *sv;
SSCHECK(4);
SSPUSHPTR(SvREFCNT_inc(hv));
SSPUSHPTR(SvREFCNT_inc(key));
SSPUSHPTR(SvREFCNT_inc(*sptr));
SSPUSHINT(SAVEt_HELEM);
save_scalar_at(sptr);
+ sv = *sptr;
+ /* If we're localizing a tied hash element, this new sv
+ * won't actually be stored in the hash - so it won't get
+ * reaped when the localize ends. Ensure it gets reaped by
+ * mortifying it instead. DAPM */
+ if (SvTIED_mg(sv, PERL_MAGIC_tiedelem))
+ sv_2mortal(sv);
}
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);
+ - (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();
+ savestack_grow();
PL_savestack_ix += elems;
SSPUSHINT(elems);
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)
SvSETMAGIC(sv);
PL_localizing = 0;
break;
- case SAVEt_SV: /* scalar reference */
+ case SAVEt_SV: /* scalar reference */
value = (SV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
ptr = &GvSV(gv);
- SvREFCNT_dec(gv);
+ av = (AV*)gv; /* what to refcnt_dec */
goto restore_sv;
- case SAVEt_GENERIC_SVREF: /* generic sv */
- value = (SV*)SSPOPPTR;
+ case SAVEt_GENERIC_PVREF: /* generic pv */
+ str = (char*)SSPOPPTR;
ptr = SSPOPPTR;
- if (ptr) {
- sv = *(SV**)ptr;
- *(SV**)ptr = value;
- SvREFCNT_dec(sv);
+ if (*(char**)ptr != str) {
+ Safefree(*(char**)ptr);
+ *(char**)ptr = str;
+ }
+ break;
+ case SAVEt_SHARED_PVREF: /* shared pv */
+ str = (char*)SSPOPPTR;
+ ptr = SSPOPPTR;
+ if (*(char**)ptr != str) {
+#ifdef NETWARE
+ PerlMem_free(*(char**)ptr);
+#else
+ PerlMemShared_free(*(char**)ptr);
+#endif
+ *(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 */
+ case SAVEt_SVREF: /* scalar reference */
value = (SV*)SSPOPPTR;
ptr = SSPOPPTR;
+ av = Nullav; /* what to refcnt_dec */
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)));
+ ptr, sv, SvPEEK(sv), value, SvPEEK(value)));
if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv) &&
SvTYPE(sv) != SVt_PVGV)
{
SvMAGICAL_off(sv);
SvMAGIC(sv) = 0;
}
+ /* XXX This branch is pretty bogus. This code irretrievably
+ * clears(!) the magic on the SV (either to avoid further
+ * croaking that might ensue when the SvSETMAGIC() below is
+ * called, or to avoid two different SVs pointing at the same
+ * SvMAGIC()). This needs a total rethink. --GSAR */
else if (SvTYPE(value) >= SVt_PVMG && SvMAGIC(value) &&
SvTYPE(value) != SVt_PVGV)
{
SvFLAGS(value) |= (SvFLAGS(value) &
- (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
SvMAGICAL_off(value);
+ /* XXX this is a leak when we get here because the
+ * mg_get() in save_scalar_at() croaked */
SvMAGIC(value) = 0;
}
- SvREFCNT_dec(sv);
*(SV**)ptr = value;
+ SvREFCNT_dec(sv);
PL_localizing = 2;
SvSETMAGIC(value);
PL_localizing = 0;
SvREFCNT_dec(value);
- break;
- case SAVEt_AV: /* array reference */
+ if (av) /* actually an av, hv or gv */
+ SvREFCNT_dec(av);
+ 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);
+ SvFLAGS((SV*)av) |= SvMAGICAL(goner);
SvMAGICAL_off(goner);
SvMAGIC(goner) = 0;
SvREFCNT_dec(goner);
}
- GvAV(gv) = av;
+ GvAV(gv) = av;
if (SvMAGICAL(av)) {
PL_localizing = 2;
SvSETMAGIC((SV*)av);
PL_localizing = 0;
}
- break;
- case SAVEt_HV: /* hash reference */
+ break;
+ case SAVEt_HV: /* hash reference */
hv = (HV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
if (GvHV(gv)) {
SvMAGIC(goner) = 0;
SvREFCNT_dec(goner);
}
- GvHV(gv) = hv;
+ GvHV(gv) = hv;
if (SvMAGICAL(hv)) {
PL_localizing = 2;
SvSETMAGIC((SV*)hv);
PL_localizing = 0;
}
- break;
+ break;
case SAVEt_INT: /* int reference */
ptr = SSPOPPTR;
*(int*)ptr = (int)SSPOPINT;
ptr = SSPOPPTR;
*(long*)ptr = (long)SSPOPLONG;
break;
+ case SAVEt_BOOL: /* bool reference */
+ ptr = SSPOPPTR;
+ *(bool*)ptr = (bool)SSPOPBOOL;
+ break;
case SAVEt_I32: /* I32 reference */
ptr = SSPOPPTR;
*(I32*)ptr = (I32)SSPOPINT;
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 (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;
+ break;
case SAVEt_FREESV:
ptr = SSPOPPTR;
SvREFCNT_dec((SV*)ptr);
break;
+ case SAVEt_MORTALIZESV:
+ ptr = SSPOPPTR;
+ sv_2mortal((SV*)ptr);
+ break;
case SAVEt_FREEOP:
ptr = SSPOPPTR;
- if (PL_comppad)
- PL_curpad = AvARRAY(PL_comppad);
+ ASSERT_CURPAD_LEGAL("SAVEt_FREEOP"); /* XXX DAPM tmp */
op_free((OP*)ptr);
break;
case SAVEt_FREEPV:
case SAVEt_CLEARSV:
ptr = (void*)&PL_curpad[SSPOPLONG];
sv = *(SV**)ptr;
+
+ DEBUG_Xv(PerlIO_printf(Perl_debug_log,
+ "Pad 0x%"UVxf"[0x%"UVxf"] clearsv: %ld sv=0x%"UVxf"<%"IVdf"> %s\n",
+ PTR2UV(PL_comppad), PTR2UV(PL_curpad),
+ (long)((SV **)ptr-PL_curpad), PTR2UV(sv), (IV)SvREFCNT(sv),
+ (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) ? "clear" : "abandon"
+ ));
+
/* Can clear pad variable in place? */
if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
+ /*
+ * if a my variable that was made readonly is going out of
+ * scope, we want to remove the readonlyness so that it can
+ * go out of scope quietly
+ */
+ if (SvPADMY(sv) && !SvFAKE(sv))
+ SvREADONLY_off(sv);
+
if (SvTHINKFIRST(sv))
- sv_force_normal(sv);
+ sv_force_normal_flags(sv, SV_IMMEDIATE_UNREF);
if (SvMAGICAL(sv))
mg_free(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);
+ SvOK_off(sv);
break;
}
+ SvPADSTALE_on(sv); /* mark as no longer live */
}
else { /* Someone has a claim on this, so abandon it. */
- U32 padflags = SvFLAGS(sv) & (SVs_PADBUSY|SVs_PADMY|SVs_PADTMP);
+ U32 padflags = SvFLAGS(sv) & (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 */
+ /* preserve pad nature, but also mark as not live
+ * for any closure capturing */
+ SvFLAGS(*(SV**)ptr) |= padflags | SVs_PADSTALE;
}
break;
case SAVEt_DELETE:
break;
case SAVEt_DESTRUCTOR_X:
ptr = SSPOPPTR;
- (*SSPOPDXPTR)(aTHXo_ ptr);
+ (*SSPOPDXPTR)(aTHX_ ptr);
break;
case SAVEt_REGCONTEXT:
case SAVEt_ALLOC:
value = (SV*)SSPOPPTR;
i = SSPOPINT;
av = (AV*)SSPOPPTR;
+ if (!AvREAL(av) && AvREIFY(av)) /* undo reify guard */
+ SvREFCNT_dec(value);
ptr = av_fetch(av,i,1);
if (ptr) {
sv = *(SV**)ptr;
if (sv && sv != &PL_sv_undef) {
- if (SvTIED_mg((SV*)av, 'P'))
+ if (SvTIED_mg((SV*)av, PERL_MAGIC_tied))
(void)SvREFCNT_inc(sv);
- SvREFCNT_dec(av);
goto restore_sv;
}
}
SV *oval = HeVAL((HE*)ptr);
if (oval && oval != &PL_sv_undef) {
ptr = &HeVAL((HE*)ptr);
- if (SvTIED_mg((SV*)hv, 'P'))
+ if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
(void)SvREFCNT_inc(*(SV**)ptr);
- SvREFCNT_dec(hv);
SvREFCNT_dec(sv);
+ av = (AV*)hv; /* what to refcnt_dec */
goto restore_sv;
}
}
PL_op = (OP*)SSPOPPTR;
break;
case SAVEt_HINTS:
- if (GvHV(PL_hintgv)) {
+ if ((PL_hints & HINT_LOCALIZE_HH) && GvHV(PL_hintgv)) {
SvREFCNT_dec((SV*)GvHV(PL_hintgv));
GvHV(PL_hintgv) = NULL;
}
*(I32*)&PL_hints = (I32)SSPOPINT;
+ if (PL_hints & HINT_LOCALIZE_HH) {
+ SvREFCNT_dec((SV*)GvHV(PL_hintgv));
+ GvHV(PL_hintgv) = (HV*)SSPOPPTR;
+ }
+
break;
case SAVEt_COMPPAD:
- PL_comppad = (AV*)SSPOPPTR;
+ PL_comppad = (PAD*)SSPOPPTR;
if (PL_comppad)
PL_curpad = AvARRAY(PL_comppad);
else
PL_curpad = Null(SV**);
break;
+ case SAVEt_PADSV:
+ {
+ PADOFFSET off = (PADOFFSET)SSPOPLONG;
+ ptr = SSPOPPTR;
+ if (ptr)
+ AvARRAY((PAD*)ptr)[off] = (SV*)SSPOPPTR;
+ }
+ break;
+ case SAVEt_SAVESWITCHSTACK:
+ {
+ dSP;
+ AV* t = (AV*)SSPOPPTR;
+ AV* f = (AV*)SSPOPPTR;
+ SWITCHSTACK(t,f);
+ PL_curstackinfo->si_stack = f;
+ }
+ break;
+ case SAVEt_SET_SVFLAGS:
+ {
+ U32 val = (U32)SSPOPINT;
+ U32 mask = (U32)SSPOPINT;
+ sv = (SV*)SSPOPPTR;
+ SvFLAGS(sv) &= ~mask;
+ SvFLAGS(sv) |= val;
+ }
+ break;
default:
Perl_croak(aTHX_ "panic: leave_scope inconsistency");
}
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);
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");
PTR2UV(cx->blk_sub.dfoutgv));
PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
(int)cx->blk_sub.hasargs);
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
+ PTR2UV(cx->blk_sub.retop));
break;
case CXt_SUB:
PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%"UVxf"\n",
(int)cx->blk_sub.hasargs);
PerlIO_printf(Perl_debug_log, "BLK_SUB.LVAL = %d\n",
(int)cx->blk_sub.lval);
+ PerlIO_printf(Perl_debug_log, "BLK_SUB.RETOP = 0x%"UVxf"\n",
+ PTR2UV(cx->blk_sub.retop));
break;
case CXt_EVAL:
PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
SvPVX(cx->blk_eval.old_namesv));
PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%"UVxf"\n",
PTR2UV(cx->blk_eval.old_eval_root));
+ PerlIO_printf(Perl_debug_log, "BLK_EVAL.RETOP = 0x%"UVxf"\n",
+ PTR2UV(cx->blk_eval.retop));
break;
case CXt_LOOP:
https://perl5.git.perl.org / perl5.git / blobdiff