/* scope.c
*
- * Copyright (c) 1991-2002, Larry Wall
+ * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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"
-#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)
-{
- 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)
{
+ dVAR;
PL_stack_sp = sp;
#ifndef STRESS_REALLOC
av_extend(PL_curstack, (p - PL_stack_base) + (n) + 128);
PERL_SI *
Perl_new_stackinfo(pTHX_ I32 stitems, I32 cxitems)
{
+ dVAR;
PERL_SI *si;
- New(56, si, 1, PERL_SI);
+ Newx(si, 1, PERL_SI);
si->si_stack = newAV();
AvREAL_off(si->si_stack);
av_extend(si->si_stack, stitems > 0 ? stitems-1 : 0);
si->si_cxmax = cxitems - 1;
si->si_cxix = -1;
si->si_type = PERLSI_UNDEF;
- New(56, si->si_cxstack, cxitems, PERL_CONTEXT);
+ Newx(si->si_cxstack, cxitems, PERL_CONTEXT);
+ /* Without any kind of initialising PUSHSUBST()
+ * in pp_subst() will read uninitialised heap. */
+ PoisonNew(si->si_cxstack, cxitems, PERL_CONTEXT);
return si;
}
I32
Perl_cxinc(pTHX)
{
+ dVAR;
+ const 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. */
+ PoisonNew(cxstack + old_max + 1, cxstack_max - old_max, PERL_CONTEXT);
return cxstack_ix + 1;
}
void
-Perl_push_return(pTHX_ OP *retop)
-{
- 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)
-{
- if (PL_retstack_ix > 0)
- return PL_retstack[--PL_retstack_ix];
- else
- return Nullop;
-}
-
-void
Perl_push_scope(pTHX)
{
+ dVAR;
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)
{
- I32 oldsave = PL_scopestack[--PL_scopestack_ix];
+ dVAR;
+ const I32 oldsave = PL_scopestack[--PL_scopestack_ix];
LEAVE_SCOPE(oldsave);
}
void
Perl_markstack_grow(pTHX)
{
- I32 oldmax = PL_markstack_max - PL_markstack;
- I32 newmax = GROW(oldmax);
+ dVAR;
+ const I32 oldmax = PL_markstack_max - PL_markstack;
+ const I32 newmax = GROW(oldmax);
Renew(PL_markstack, newmax, I32);
PL_markstack_ptr = PL_markstack + oldmax;
void
Perl_savestack_grow(pTHX)
{
+ dVAR;
PL_savestack_max = GROW(PL_savestack_max) + 4;
Renew(PL_savestack, PL_savestack_max, ANY);
}
+void
+Perl_savestack_grow_cnt(pTHX_ I32 need)
+{
+ dVAR;
+ PL_savestack_max = PL_savestack_ix + need;
+ Renew(PL_savestack, PL_savestack_max, ANY);
+}
+
#undef GROW
void
Perl_tmps_grow(pTHX_ I32 n)
{
+ dVAR;
#ifndef STRESS_REALLOC
if (n < 128)
n = (PL_tmps_max < 512) ? 128 : 512;
void
Perl_free_tmps(pTHX)
{
+ dVAR;
/* XXX should tmps_floor live in cxstack? */
- I32 myfloor = PL_tmps_floor;
+ const 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;
+ SV* const sv = PL_tmps_stack[PL_tmps_ix];
+ PL_tmps_stack[PL_tmps_ix--] = NULL;
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)
{
- register SV *sv;
- SV *osv = *sptr;
+ dVAR;
+ SV * const osv = *sptr;
+ register SV * const sv = *sptr = newSV(0);
+
+#ifdef PERL_MAD
+ /* FIXME for MAD - this is causing ext/Safe/t/safeops.t to abort. */
+ if (PL_formfeed && sv == PL_formfeed)
+ abort();
+#endif
- 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); /* note, can croak! */
- if (PL_tainting && PL_tainted &&
- (mg = mg_find(osv, PERL_MAGIC_taint))) {
- SAVESPTR(mg->mg_obj);
- mg->mg_obj = osv;
- }
+ const bool oldtainted = PL_tainted;
SvFLAGS(osv) |= (SvFLAGS(osv) &
- (SVp_NOK|SVp_POK)) >> PRIVSHIFT;
+ (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
PL_tainted = oldtainted;
}
- SvMAGIC(sv) = SvMAGIC(osv);
- 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;
+ mg_localize(osv, sv);
}
return sv;
}
SV *
Perl_save_scalar(pTHX_ GV *gv)
{
- SV **sptr = &GvSV(gv);
+ dVAR;
+ SV ** const sptr = &GvSVn(gv);
+#ifdef PERL_MAD
+ if (PL_formfeed && *sptr == PL_formfeed)
+ abort();
+#endif
+ PL_localizing = 1;
+ SvGETMAGIC(*sptr);
+ PL_localizing = 0;
SSCHECK(3);
- SSPUSHPTR(SvREFCNT_inc(gv));
+ SSPUSHPTR(SvREFCNT_inc_simple(gv));
SSPUSHPTR(SvREFCNT_inc(*sptr));
SSPUSHINT(SAVEt_SV);
return save_scalar_at(sptr);
}
-SV*
-Perl_save_svref(pTHX_ SV **sptr)
-{
- 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)
{
+ dVAR;
+#ifdef PERL_MAD
+ if (PL_formfeed && *sptr == PL_formfeed)
+ abort();
+#endif
SSCHECK(3);
SSPUSHPTR(sptr);
SSPUSHPTR(SvREFCNT_inc(*sptr));
void
Perl_save_generic_pvref(pTHX_ char **str)
{
+ dVAR;
SSCHECK(3);
- SSPUSHPTR(str);
SSPUSHPTR(*str);
+ SSPUSHPTR(str);
SSPUSHINT(SAVEt_GENERIC_PVREF);
}
void
Perl_save_shared_pvref(pTHX_ char **str)
{
+ dVAR;
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)
+{
+ dVAR;
+ SSCHECK(4);
+ SSPUSHPTR(sv);
+ SSPUSHINT(mask);
+ SSPUSHINT(val);
+ SSPUSHINT(SAVEt_SET_SVFLAGS);
+}
+
void
Perl_save_gp(pTHX_ GV *gv, I32 empty)
{
- 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);
+ dVAR;
+ SSGROW(3);
SSPUSHPTR(SvREFCNT_inc(gv));
SSPUSHPTR(GvGP(gv));
SSPUSHINT(SAVEt_GP);
if (empty) {
register GP *gp;
- Newz(602, gp, 1, GP);
+ Newxz(gp, 1, GP);
if (GvCVu(gv))
PL_sub_generation++; /* taking a method out of circulation */
IoFLAGS(gp->gp_io) |= IOf_ARGV|IOf_START;
}
GvGP(gv) = gp_ref(gp);
- GvSV(gv) = NEWSV(72,0);
+#ifndef PERL_DONT_CREATE_GVSV
+ GvSV(gv) = newSV(0);
+#endif
GvLINE(gv) = CopLINE(PL_curcop);
- GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : "";
+ /* XXX Ideally this cast would be replaced with a change to const char*
+ in the struct. */
+ GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) "";
GvEGV(gv) = gv;
}
else {
AV *
Perl_save_ary(pTHX_ GV *gv)
{
- AV *oav = GvAVn(gv);
+ dVAR;
+ AV * const oav = GvAVn(gv);
AV *av;
if (!AvREAL(oav) && AvREIFY(oav))
SSPUSHPTR(oav);
SSPUSHINT(SAVEt_AV);
- GvAV(gv) = Null(AV*);
+ GvAV(gv) = NULL;
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;
- }
+ if (SvMAGIC(oav))
+ mg_localize((SV*)oav, (SV*)av);
return av;
}
HV *
Perl_save_hash(pTHX_ GV *gv)
{
+ dVAR;
HV *ohv, *hv;
SSCHECK(3);
SSPUSHPTR(ohv = GvHVn(gv));
SSPUSHINT(SAVEt_HV);
- GvHV(gv) = Null(HV*);
+ GvHV(gv) = NULL;
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;
- }
+ if (SvMAGIC(ohv))
+ mg_localize((SV*)ohv, (SV*)hv);
return hv;
}
void
Perl_save_item(pTHX_ register SV *item)
{
- register SV *sv = NEWSV(0,0);
+ dVAR;
+ register SV * const sv = newSVsv(item);
+
+#ifdef PERL_MAD
+ if (PL_formfeed && item == PL_formfeed)
+ abort();
+#endif
- sv_setsv(sv,item);
SSCHECK(3);
SSPUSHPTR(item); /* remember the pointer */
SSPUSHPTR(sv); /* remember the value */
void
Perl_save_int(pTHX_ int *intp)
{
+ dVAR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
}
void
-Perl_save_long(pTHX_ long int *longp)
+Perl_save_bool(pTHX_ bool *boolp)
{
+ dVAR;
SSCHECK(3);
- SSPUSHLONG(*longp);
- SSPUSHPTR(longp);
- SSPUSHINT(SAVEt_LONG);
+ SSPUSHBOOL(*boolp);
+ SSPUSHPTR(boolp);
+ SSPUSHINT(SAVEt_BOOL);
}
void
Perl_save_I32(pTHX_ I32 *intp)
{
+ dVAR;
SSCHECK(3);
SSPUSHINT(*intp);
SSPUSHPTR(intp);
SSPUSHINT(SAVEt_I32);
}
-void
-Perl_save_I16(pTHX_ I16 *intp)
-{
- SSCHECK(3);
- SSPUSHINT(*intp);
- SSPUSHPTR(intp);
- SSPUSHINT(SAVEt_I16);
-}
-
-void
-Perl_save_I8(pTHX_ I8 *bytep)
-{
- SSCHECK(3);
- SSPUSHINT(*bytep);
- SSPUSHPTR(bytep);
- SSPUSHINT(SAVEt_I8);
-}
-
-void
-Perl_save_iv(pTHX_ IV *ivp)
-{
- 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)
{
+ dVAR;
SSCHECK(3);
SSPUSHPTR(*pptr);
SSPUSHPTR(pptr);
void
Perl_save_vptr(pTHX_ void *ptr)
{
+ dVAR;
SSCHECK(3);
SSPUSHPTR(*(char**)ptr);
SSPUSHPTR(ptr);
void
Perl_save_sptr(pTHX_ SV **sptr)
{
+ dVAR;
SSCHECK(3);
SSPUSHPTR(*sptr);
SSPUSHPTR(sptr);
void
Perl_save_padsv(pTHX_ PADOFFSET off)
{
+ dVAR;
SSCHECK(4);
+ ASSERT_CURPAD_ACTIVE("save_padsv");
SSPUSHPTR(PL_curpad[off]);
- SSPUSHPTR(PL_curpad);
+ SSPUSHPTR(PL_comppad);
SSPUSHLONG((long)off);
SSPUSHINT(SAVEt_PADSV);
}
-SV **
-Perl_save_threadsv(pTHX_ PADOFFSET i)
-{
-#ifdef USE_5005THREADS
- 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_5005THREADS */
-}
-
-void
-Perl_save_nogv(pTHX_ GV *gv)
-{
- SSCHECK(2);
- SSPUSHPTR(gv);
- SSPUSHINT(SAVEt_NSTAB);
-}
-
void
Perl_save_hptr(pTHX_ HV **hptr)
{
+ dVAR;
SSCHECK(3);
SSPUSHPTR(*hptr);
SSPUSHPTR(hptr);
void
Perl_save_aptr(pTHX_ AV **aptr)
{
+ dVAR;
SSCHECK(3);
SSPUSHPTR(*aptr);
SSPUSHPTR(aptr);
void
Perl_save_freesv(pTHX_ SV *sv)
{
+ dVAR;
SSCHECK(2);
SSPUSHPTR(sv);
SSPUSHINT(SAVEt_FREESV);
void
Perl_save_mortalizesv(pTHX_ SV *sv)
{
+ dVAR;
SSCHECK(2);
SSPUSHPTR(sv);
SSPUSHINT(SAVEt_MORTALIZESV);
void
Perl_save_freeop(pTHX_ OP *o)
{
+ dVAR;
SSCHECK(2);
SSPUSHPTR(o);
SSPUSHINT(SAVEt_FREEOP);
void
Perl_save_freepv(pTHX_ char *pv)
{
+ dVAR;
SSCHECK(2);
SSPUSHPTR(pv);
SSPUSHINT(SAVEt_FREEPV);
void
Perl_save_clearsv(pTHX_ SV **svp)
{
+ dVAR;
+ 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)
{
+ dVAR;
SSCHECK(4);
SSPUSHINT(klen);
SSPUSHPTR(key);
- SSPUSHPTR(SvREFCNT_inc(hv));
+ SSPUSHPTR(SvREFCNT_inc_simple(hv));
SSPUSHINT(SAVEt_DELETE);
}
void
-Perl_save_list(pTHX_ register SV **sarg, I32 maxsarg)
-{
- 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)
-{
- SSCHECK(3);
- SSPUSHDPTR(f);
- SSPUSHPTR(p);
- SSPUSHINT(SAVEt_DESTRUCTOR);
-}
-
-void
Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
{
+ dVAR;
SSCHECK(3);
SSPUSHDXPTR(f);
SSPUSHPTR(p);
void
Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
{
+ dVAR;
+ SV *sv;
+ SvGETMAGIC(*sptr);
SSCHECK(4);
- SSPUSHPTR(SvREFCNT_inc(av));
+ SSPUSHPTR(SvREFCNT_inc_simple(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_void(*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)
{
+ dVAR;
+ SV *sv;
+ SvGETMAGIC(*sptr);
SSCHECK(4);
- SSPUSHPTR(SvREFCNT_inc(hv));
- SSPUSHPTR(SvREFCNT_inc(key));
+ SSPUSHPTR(SvREFCNT_inc_simple(hv));
+ SSPUSHPTR(SvREFCNT_inc_simple(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);
+}
+
+SV*
+Perl_save_svref(pTHX_ SV **sptr)
+{
+ dVAR;
+#ifdef PERL_MAD
+ if (PL_formfeed && *sptr == PL_formfeed)
+ abort();
+#endif
+ SvGETMAGIC(*sptr);
+ SSCHECK(3);
+ SSPUSHPTR(sptr);
+ SSPUSHPTR(SvREFCNT_inc(*sptr));
+ SSPUSHINT(SAVEt_SVREF);
+ return save_scalar_at(sptr);
}
void
Perl_save_op(pTHX)
{
+ dVAR;
SSCHECK(2);
SSPUSHPTR(PL_op);
SSPUSHINT(SAVEt_OP);
I32
Perl_save_alloc(pTHX_ I32 size, I32 pad)
{
- register I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
+ dVAR;
+ register const I32 start = pad + ((char*)&PL_savestack[PL_savestack_ix]
- (char*)PL_savestack);
- register I32 elems = 1 + ((size + pad - 1) / sizeof(*PL_savestack));
+ register const 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();
+ SSGROW(elems + 2);
PL_savestack_ix += elems;
SSPUSHINT(elems);
void
Perl_leave_scope(pTHX_ I32 base)
{
+ dVAR;
register SV *sv;
register SV *value;
register GV *gv;
register AV *av;
register HV *hv;
- register void* ptr;
+ void* ptr;
register char* str;
I32 i;
value = (SV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
ptr = &GvSV(gv);
- SvREFCNT_dec(gv);
- goto restore_sv;
+ av = (AV*)gv; /* 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)));
+ *(SV**)ptr = value;
+ SvREFCNT_dec(sv);
+ PL_localizing = 2;
+ SvSETMAGIC(value);
+ PL_localizing = 0;
+ SvREFCNT_dec(value);
+ if (av) /* actually an av, hv or gv */
+ SvREFCNT_dec(av);
+ break;
case SAVEt_GENERIC_PVREF: /* generic pv */
- str = (char*)SSPOPPTR;
ptr = SSPOPPTR;
+ str = (char*)SSPOPPTR;
if (*(char**)ptr != str) {
Safefree(*(char**)ptr);
*(char**)ptr = str;
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;
- }
- /* 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_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;
- 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);
+ AV * const goner = GvAV(gv);
+ /* FIXME - this is a temporary hack until we work out what
+ the correct behaviour for magic should be. */
+ sv_unmagic((SV*)goner, PERL_MAGIC_arylen_p);
+ SvMAGIC_set(av, SvMAGIC(goner));
SvFLAGS((SV*)av) |= SvMAGICAL(goner);
SvMAGICAL_off(goner);
- SvMAGIC(goner) = 0;
+ SvMAGIC_set(goner, NULL);
SvREFCNT_dec(goner);
}
GvAV(gv) = av;
hv = (HV*)SSPOPPTR;
gv = (GV*)SSPOPPTR;
if (GvHV(gv)) {
- HV *goner = GvHV(gv);
- SvMAGIC(hv) = SvMAGIC(goner);
+ HV * const goner = GvHV(gv);
+ SvMAGIC_set(hv, SvMAGIC(goner));
SvFLAGS(hv) |= SvMAGICAL(goner);
SvMAGICAL_off(goner);
- SvMAGIC(goner) = 0;
+ SvMAGIC_set(goner, NULL);
SvREFCNT_dec(goner);
}
GvHV(gv) = hv;
ptr = SSPOPPTR;
*(int*)ptr = (int)SSPOPINT;
break;
- case SAVEt_LONG: /* long reference */
+ case SAVEt_BOOL: /* bool reference */
ptr = SSPOPPTR;
- *(long*)ptr = (long)SSPOPLONG;
+ *(bool*)ptr = (bool)SSPOPBOOL;
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;
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))
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:
ptr = SSPOPPTR;
- Safefree((char*)ptr);
+ Safefree(ptr);
break;
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)) {
/*
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);
+ const 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;
+ default: *(SV**)ptr = newSV(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:
ptr = SSPOPPTR;
hv = (HV*)ptr;
ptr = SSPOPPTR;
- (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
+ (void)hv_delete(hv, (char*)ptr, (I32)SSPOPINT, G_DISCARD);
SvREFCNT_dec(hv);
Safefree(ptr);
break;
- case SAVEt_DESTRUCTOR:
- ptr = SSPOPPTR;
- (*SSPOPDPTR)(ptr);
- break;
case SAVEt_DESTRUCTOR_X:
ptr = SSPOPPTR;
(*SSPOPDXPTR)(aTHX_ ptr);
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, PERL_MAGIC_tied))
- (void)SvREFCNT_inc(sv);
- SvREFCNT_dec(av);
+ SvREFCNT_inc_void_NN(sv);
goto restore_sv;
}
}
hv = (HV*)SSPOPPTR;
ptr = hv_fetch_ent(hv, sv, 1, 0);
if (ptr) {
- SV *oval = HeVAL((HE*)ptr);
+ const SV * const oval = HeVAL((HE*)ptr);
if (oval && oval != &PL_sv_undef) {
ptr = &HeVAL((HE*)ptr);
if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied))
- (void)SvREFCNT_inc(*(SV**)ptr);
- SvREFCNT_dec(hv);
+ SvREFCNT_inc_void(*(SV**)ptr);
SvREFCNT_dec(sv);
+ av = (AV*)hv; /* what to refcnt_dec */
goto restore_sv;
}
}
GvHV(PL_hintgv) = NULL;
}
*(I32*)&PL_hints = (I32)SSPOPINT;
+ Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints);
+ PL_compiling.cop_hints = (struct refcounted_he *) SSPOPPTR;
+ if (PL_hints & HINT_LOCALIZE_HH) {
+ SvREFCNT_dec((SV*)GvHV(PL_hintgv));
+ GvHV(PL_hintgv) = (HV*)SSPOPPTR;
+ assert(GvHV(PL_hintgv));
+ } else if (!GvHV(PL_hintgv)) {
+ /* Need to add a new one manually, else gv_fetchpv() can
+ add one in this code:
+
+ if (SvTYPE(gv) == SVt_PVGV) {
+ if (add) {
+ GvMULTI_on(gv);
+ gv_init_sv(gv, sv_type);
+ if (*name=='!' && sv_type == SVt_PVHV && len==1)
+ require_errno(gv);
+ }
+ return gv;
+ }
+
+ and it won't have the magic set. */
+
+ HV *const hv = newHV();
+ hv_magic(hv, NULL, PERL_MAGIC_hints);
+ GvHV(PL_hintgv) = hv;
+ }
+ assert(GvHV(PL_hintgv));
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**);
+ PL_curpad = NULL;
break;
case SAVEt_PADSV:
{
- PADOFFSET off = (PADOFFSET)SSPOPLONG;
+ const PADOFFSET off = (PADOFFSET)SSPOPLONG;
ptr = SSPOPPTR;
if (ptr)
- ((SV**)ptr)[off] = (SV*)SSPOPPTR;
+ AvARRAY((PAD*)ptr)[off] = (SV*)SSPOPPTR;
+ }
+ break;
+ case SAVEt_SAVESWITCHSTACK:
+ {
+ dSP;
+ AV* const t = (AV*)SSPOPPTR;
+ AV* const f = (AV*)SSPOPPTR;
+ SWITCHSTACK(t,f);
+ PL_curstackinfo->si_stack = f;
+ }
+ break;
+ case SAVEt_SET_SVFLAGS:
+ {
+ const U32 val = (U32)SSPOPINT;
+ const U32 mask = (U32)SSPOPINT;
+ sv = (SV*)SSPOPPTR;
+ SvFLAGS(sv) &= ~mask;
+ SvFLAGS(sv) |= val;
+ }
+ break;
+ /* These are only saved in mathoms.c */
+ case SAVEt_SVREF: /* scalar reference */
+ value = (SV*)SSPOPPTR;
+ ptr = SSPOPPTR;
+ av = NULL; /* what to refcnt_dec */
+ goto restore_sv;
+ case SAVEt_LONG: /* long reference */
+ ptr = SSPOPPTR;
+ *(long*)ptr = (long)SSPOPLONG;
+ 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_NSTAB:
+ gv = (GV*)SSPOPPTR;
+ (void)sv_clear((SV*)gv);
+ break;
+ case SAVEt_DESTRUCTOR:
+ ptr = SSPOPPTR;
+ (*SSPOPDPTR)(ptr);
+ break;
+ case SAVEt_COP_ARYBASE:
+ ptr = SSPOPPTR;
+ i = SSPOPINT;
+ CopARYBASE_set((COP *)ptr, i);
+ break;
+ case SAVEt_COMPILE_WARNINGS:
+ ptr = SSPOPPTR;
+
+ if (!specialWARN(PL_compiling.cop_warnings))
+ PerlMemShared_free(PL_compiling.cop_warnings);
+
+ PL_compiling.cop_warnings = ptr;
+ break;
+ case SAVEt_RE_STATE:
+ {
+ const struct re_save_state *const state
+ = (struct re_save_state *)
+ (PL_savestack + PL_savestack_ix
+ - SAVESTACK_ALLOC_FOR_RE_SAVE_STATE);
+ PL_savestack_ix -= SAVESTACK_ALLOC_FOR_RE_SAVE_STATE;
+
+ if (PL_reg_start_tmp != state->re_state_reg_start_tmp) {
+ Safefree(PL_reg_start_tmp);
+ }
+ if (PL_reg_poscache != state->re_state_reg_poscache) {
+ Safefree(PL_reg_poscache);
+ }
+ Copy(state, &PL_reg_state, 1, struct re_save_state);
}
break;
default:
void
Perl_cx_dump(pTHX_ PERL_CONTEXT *cx)
{
+ dVAR;
#ifdef DEBUGGING
PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), PL_block_type[CxTYPE(cx)]);
if (CxTYPE(cx) != CXt_SUBST) {
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",
PL_op_desc[cx->blk_eval.old_op_type]);
if (cx->blk_eval.old_namesv)
PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_NAME = %s\n",
- SvPVX(cx->blk_eval.old_namesv));
+ SvPVX_const(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:
PTR2UV(cx->sb_rxres));
break;
}
+#else
+ PERL_UNUSED_CONTEXT;
+ PERL_UNUSED_ARG(cx);
#endif /* DEBUGGING */
}
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */
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