X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=scope.c;h=50798e47c735e8f7fdd2d06016b9b6d67b5ae0cd;hb=352e1c09cf09498d4917c120c2055943a4301c0a;hp=88fb53aac55e970b7541d6f6aa6e90ce0c399d63;hpb=c6ae76470e6575530141df6c32cf71111bc2e391;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/scope.c b/scope.c
index 88fb53a..50798e4 100644
--- a/scope.c
+++ b/scope.c
@@ -167,11 +167,14 @@ STATIC SV *
 S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
 {
     dVAR;
-    SV * const osv = *sptr;
-    register SV * const sv = *sptr = newSV(0);
+    SV * osv;
+    register SV *sv;
 
     PERL_ARGS_ASSERT_SAVE_SCALAR_AT;
 
+    osv = *sptr;
+    sv  = (flags & SAVEf_KEEPOLDELEM) ? osv : (*sptr = newSV(0));
+
     if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv) && SvTYPE(osv) != SVt_PVGV) {
 	if (SvGMAGICAL(osv)) {
 	    const bool oldtainted = PL_tainted;
@@ -179,11 +182,23 @@ S_save_scalar_at(pTHX_ SV **sptr, const U32 flags)
 	       (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
 	    PL_tainted = oldtainted;
 	}
-	mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
+	if (!(flags & SAVEf_KEEPOLDELEM))
+	    mg_localize(osv, sv, (flags & SAVEf_SETMAGIC) != 0);
     }
+
     return sv;
 }
 
+void
+Perl_save_pushptrptr(pTHX_ void *const ptr1, void *const ptr2, const int type)
+{
+    dVAR;
+    SSCHECK(3);
+    SSPUSHPTR(ptr1);
+    SSPUSHPTR(ptr2);
+    SSPUSHINT(type);
+}
+
 SV *
 Perl_save_scalar(pTHX_ GV *gv)
 {
@@ -195,10 +210,7 @@ Perl_save_scalar(pTHX_ GV *gv)
     PL_localizing = 1;
     SvGETMAGIC(*sptr);
     PL_localizing = 0;
-    SSCHECK(3);
-    SSPUSHPTR(SvREFCNT_inc_simple(gv));
-    SSPUSHPTR(SvREFCNT_inc(*sptr));
-    SSPUSHINT(SAVEt_SV);
+    save_pushptrptr(SvREFCNT_inc_simple(gv), SvREFCNT_inc(*sptr), SAVEt_SV);
     return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
 }
 
@@ -211,10 +223,7 @@ Perl_save_generic_svref(pTHX_ SV **sptr)
 
     PERL_ARGS_ASSERT_SAVE_GENERIC_SVREF;
 
-    SSCHECK(3);
-    SSPUSHPTR(sptr);
-    SSPUSHPTR(SvREFCNT_inc(*sptr));
-    SSPUSHINT(SAVEt_GENERIC_SVREF);
+    save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_GENERIC_SVREF);
 }
 
 /* Like save_pptr(), but also Safefree()s the new value if it is different
@@ -227,10 +236,7 @@ Perl_save_generic_pvref(pTHX_ char **str)
 
     PERL_ARGS_ASSERT_SAVE_GENERIC_PVREF;
 
-    SSCHECK(3);
-    SSPUSHPTR(*str);
-    SSPUSHPTR(str);
-    SSPUSHINT(SAVEt_GENERIC_PVREF);
+    save_pushptrptr(*str, str, SAVEt_GENERIC_PVREF);
 }
 
 /* Like save_generic_pvref(), but uses PerlMemShared_free() rather than Safefree().
@@ -243,10 +249,7 @@ Perl_save_shared_pvref(pTHX_ char **str)
 
     PERL_ARGS_ASSERT_SAVE_SHARED_PVREF;
 
-    SSCHECK(3);
-    SSPUSHPTR(str);
-    SSPUSHPTR(*str);
-    SSPUSHINT(SAVEt_SHARED_PVREF);
+    save_pushptrptr(str, *str, SAVEt_SHARED_PVREF);
 }
 
 /* set the SvFLAGS specified by mask to the values in val */
@@ -272,10 +275,7 @@ Perl_save_gp(pTHX_ GV *gv, I32 empty)
 
     PERL_ARGS_ASSERT_SAVE_GP;
 
-    SSGROW(3);
-    SSPUSHPTR(SvREFCNT_inc(gv));
-    SSPUSHPTR(GvGP(gv));
-    SSPUSHINT(SAVEt_GP);
+    save_pushptrptr(SvREFCNT_inc(gv), GvGP(gv), SAVEt_GP);
 
     if (empty) {
 	GP *gp = Perl_newGP(aTHX_ gv);
@@ -313,10 +313,7 @@ Perl_save_ary(pTHX_ GV *gv)
 
     if (!AvREAL(oav) && AvREIFY(oav))
 	av_reify(oav);
-    SSCHECK(3);
-    SSPUSHPTR(gv);
-    SSPUSHPTR(oav);
-    SSPUSHINT(SAVEt_AV);
+    save_pushptrptr(gv, oav, SAVEt_AV);
 
     GvAV(gv) = NULL;
     av = GvAVn(gv);
@@ -333,10 +330,7 @@ Perl_save_hash(pTHX_ GV *gv)
 
     PERL_ARGS_ASSERT_SAVE_HASH;
 
-    SSCHECK(3);
-    SSPUSHPTR(gv);
-    SSPUSHPTR(ohv = GvHVn(gv));
-    SSPUSHINT(SAVEt_HV);
+    save_pushptrptr(gv, (ohv = GvHVn(gv)), SAVEt_HV);
 
     GvHV(gv) = NULL;
     hv = GvHVn(gv);
@@ -353,36 +347,42 @@ Perl_save_item(pTHX_ register SV *item)
 
     PERL_ARGS_ASSERT_SAVE_ITEM;
 
-    SSCHECK(3);
-    SSPUSHPTR(item);		/* remember the pointer */
-    SSPUSHPTR(sv);		/* remember the value */
-    SSPUSHINT(SAVEt_ITEM);
+    save_pushptrptr(item, /* remember the pointer */
+		    sv,   /* remember the value */
+		    SAVEt_ITEM);
 }
 
 void
-Perl_save_int(pTHX_ int *intp)
+Perl_save_bool(pTHX_ bool *boolp)
 {
     dVAR;
 
-    PERL_ARGS_ASSERT_SAVE_INT;
+    PERL_ARGS_ASSERT_SAVE_BOOL;
 
     SSCHECK(3);
-    SSPUSHINT(*intp);
-    SSPUSHPTR(intp);
-    SSPUSHINT(SAVEt_INT);
+    SSPUSHBOOL(*boolp);
+    SSPUSHPTR(boolp);
+    SSPUSHINT(SAVEt_BOOL);
 }
 
 void
-Perl_save_bool(pTHX_ bool *boolp)
+Perl_save_pushi32ptr(pTHX_ const I32 i, void *const ptr, const int type)
 {
     dVAR;
+    SSCHECK(3);
+    SSPUSHINT(i);
+    SSPUSHPTR(ptr);
+    SSPUSHINT(type);
+}
 
-    PERL_ARGS_ASSERT_SAVE_BOOL;
+void
+Perl_save_int(pTHX_ int *intp)
+{
+    dVAR;
 
-    SSCHECK(3);
-    SSPUSHBOOL(*boolp);
-    SSPUSHPTR(boolp);
-    SSPUSHINT(SAVEt_BOOL);
+    PERL_ARGS_ASSERT_SAVE_INT;
+
+    save_pushi32ptr(*intp, intp, SAVEt_INT);
 }
 
 void
@@ -392,10 +392,7 @@ Perl_save_I8(pTHX_ I8 *bytep)
 
     PERL_ARGS_ASSERT_SAVE_I8;
 
-    SSCHECK(3);
-    SSPUSHINT(*bytep);
-    SSPUSHPTR(bytep);
-    SSPUSHINT(SAVEt_I8);
+    save_pushi32ptr(*bytep, bytep, SAVEt_I8);
 }
 
 void
@@ -405,10 +402,7 @@ Perl_save_I16(pTHX_ I16 *intp)
 
     PERL_ARGS_ASSERT_SAVE_I16;
 
-    SSCHECK(3);
-    SSPUSHINT(*intp);
-    SSPUSHPTR(intp);
-    SSPUSHINT(SAVEt_I16);
+    save_pushi32ptr(*intp, intp, SAVEt_I16);
 }
 
 void
@@ -418,10 +412,7 @@ Perl_save_I32(pTHX_ I32 *intp)
 
     PERL_ARGS_ASSERT_SAVE_I32;
 
-    SSCHECK(3);
-    SSPUSHINT(*intp);
-    SSPUSHPTR(intp);
-    SSPUSHINT(SAVEt_I32);
+    save_pushi32ptr(*intp, intp, SAVEt_I32);
 }
 
 /* Cannot use save_sptr() to store a char* since the SV** cast will
@@ -434,10 +425,7 @@ Perl_save_pptr(pTHX_ char **pptr)
 
     PERL_ARGS_ASSERT_SAVE_PPTR;
 
-    SSCHECK(3);
-    SSPUSHPTR(*pptr);
-    SSPUSHPTR(pptr);
-    SSPUSHINT(SAVEt_PPTR);
+    save_pushptrptr(*pptr, pptr, SAVEt_PPTR);
 }
 
 void
@@ -447,10 +435,7 @@ Perl_save_vptr(pTHX_ void *ptr)
 
     PERL_ARGS_ASSERT_SAVE_VPTR;
 
-    SSCHECK(3);
-    SSPUSHPTR(*(char**)ptr);
-    SSPUSHPTR(ptr);
-    SSPUSHINT(SAVEt_VPTR);
+    save_pushptrptr(*(char**)ptr, ptr, SAVEt_VPTR);
 }
 
 void
@@ -460,10 +445,7 @@ Perl_save_sptr(pTHX_ SV **sptr)
 
     PERL_ARGS_ASSERT_SAVE_SPTR;
 
-    SSCHECK(3);
-    SSPUSHPTR(*sptr);
-    SSPUSHPTR(sptr);
-    SSPUSHINT(SAVEt_SPTR);
+    save_pushptrptr(*sptr, sptr, SAVEt_SPTR);
 }
 
 void
@@ -485,10 +467,7 @@ Perl_save_hptr(pTHX_ HV **hptr)
 
     PERL_ARGS_ASSERT_SAVE_HPTR;
 
-    SSCHECK(3);
-    SSPUSHPTR(*hptr);
-    SSPUSHPTR(hptr);
-    SSPUSHINT(SAVEt_HPTR);
+    save_pushptrptr(*hptr, hptr, SAVEt_HPTR);
 }
 
 void
@@ -498,77 +477,66 @@ Perl_save_aptr(pTHX_ AV **aptr)
 
     PERL_ARGS_ASSERT_SAVE_APTR;
 
-    SSCHECK(3);
-    SSPUSHPTR(*aptr);
-    SSPUSHPTR(aptr);
-    SSPUSHINT(SAVEt_APTR);
+    save_pushptrptr(*aptr, aptr, SAVEt_APTR);
 }
 
 void
-Perl_save_freesv(pTHX_ SV *sv)
+Perl_save_pushptr(pTHX_ void *const ptr, const int type)
 {
     dVAR;
     SSCHECK(2);
-    SSPUSHPTR(sv);
-    SSPUSHINT(SAVEt_FREESV);
+    SSPUSHPTR(ptr);
+    SSPUSHINT(type);
 }
 
 void
-Perl_save_mortalizesv(pTHX_ SV *sv)
+Perl_save_clearsv(pTHX_ SV **svp)
 {
     dVAR;
 
-    PERL_ARGS_ASSERT_SAVE_MORTALIZESV;
+    PERL_ARGS_ASSERT_SAVE_CLEARSV;
 
+    ASSERT_CURPAD_ACTIVE("save_clearsv");
     SSCHECK(2);
-    SSPUSHPTR(sv);
-    SSPUSHINT(SAVEt_MORTALIZESV);
+    SSPUSHLONG((long)(svp-PL_curpad));
+    SSPUSHINT(SAVEt_CLEARSV);
+    SvPADSTALE_off(*svp); /* mark lexical as active */
 }
 
 void
-Perl_save_freeop(pTHX_ OP *o)
+Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
 {
     dVAR;
-    SSCHECK(2);
-    SSPUSHPTR(o);
-    SSPUSHINT(SAVEt_FREEOP);
-}
 
-void
-Perl_save_freepv(pTHX_ char *pv)
-{
-    dVAR;
-    SSCHECK(2);
-    SSPUSHPTR(pv);
-    SSPUSHINT(SAVEt_FREEPV);
+    PERL_ARGS_ASSERT_SAVE_DELETE;
+
+    save_pushptri32ptr(key, klen, SvREFCNT_inc_simple(hv), SAVEt_DELETE);
 }
 
 void
-Perl_save_clearsv(pTHX_ SV **svp)
+Perl_save_hdelete(pTHX_ HV *hv, SV *keysv)
 {
-    dVAR;
+    STRLEN len;
+    I32 klen;
+    const char *key;
 
-    PERL_ARGS_ASSERT_SAVE_CLEARSV;
+    PERL_ARGS_ASSERT_SAVE_HDELETE;
 
-    ASSERT_CURPAD_ACTIVE("save_clearsv");
-    SSCHECK(2);
-    SSPUSHLONG((long)(svp-PL_curpad));
-    SSPUSHINT(SAVEt_CLEARSV);
-    SvPADSTALE_off(*svp); /* mark lexical as active */
+    key  = SvPV_const(keysv, len);
+    klen = SvUTF8(keysv) ? -(I32)len : (I32)len;
+    SvREFCNT_inc_simple_void_NN(hv);
+    save_pushptri32ptr(savepvn(key, len), klen, hv, SAVEt_DELETE);
 }
 
 void
-Perl_save_delete(pTHX_ HV *hv, char *key, I32 klen)
+Perl_save_adelete(pTHX_ AV *av, I32 key)
 {
     dVAR;
 
-    PERL_ARGS_ASSERT_SAVE_DELETE;
+    PERL_ARGS_ASSERT_SAVE_ADELETE;
 
-    SSCHECK(4);
-    SSPUSHINT(klen);
-    SSPUSHPTR(key);
-    SSPUSHPTR(SvREFCNT_inc_simple(hv));
-    SSPUSHINT(SAVEt_DELETE);
+    SvREFCNT_inc_void(av);
+    save_pushi32ptr(key, av, SAVEt_ADELETE);
 }
 
 void
@@ -595,23 +563,51 @@ Perl_save_destructor_x(pTHX_ DESTRUCTORFUNC_t f, void* p)
 }
 
 void
-Perl_save_aelem(pTHX_ AV *av, I32 idx, SV **sptr)
+Perl_save_hints(pTHX)
+{
+    dVAR;
+    if (PL_compiling.cop_hints_hash) {
+	HINTS_REFCNT_LOCK;
+	    PL_compiling.cop_hints_hash->refcounted_he_refcnt++;
+	    HINTS_REFCNT_UNLOCK;
+    }
+    if (PL_hints & HINT_LOCALIZE_HH) {
+	save_pushptri32ptr(GvHV(PL_hintgv), PL_hints,
+			   PL_compiling.cop_hints_hash, SAVEt_HINTS);
+	GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv));
+    } else {
+	save_pushi32ptr(PL_hints, PL_compiling.cop_hints_hash, SAVEt_HINTS);
+    }
+}
+
+static void
+S_save_pushptri32ptr(pTHX_ void *const ptr1, const I32 i, void *const ptr2,
+			const int type)
+{
+    SSCHECK(4);
+    SSPUSHPTR(ptr1);
+    SSPUSHINT(i);
+    SSPUSHPTR(ptr2);
+    SSPUSHINT(type);
+}
+
+void
+Perl_save_aelem_flags(pTHX_ AV *av, I32 idx, SV **sptr, const U32 flags)
 {
     dVAR;
     SV *sv;
 
-    PERL_ARGS_ASSERT_SAVE_AELEM;
+    PERL_ARGS_ASSERT_SAVE_AELEM_FLAGS;
 
     SvGETMAGIC(*sptr);
-    SSCHECK(4);
-    SSPUSHPTR(SvREFCNT_inc_simple(av));
-    SSPUSHINT(idx);
-    SSPUSHPTR(SvREFCNT_inc(*sptr));
-    SSPUSHINT(SAVEt_AELEM);
+    save_pushptri32ptr(SvREFCNT_inc_simple(av), idx, SvREFCNT_inc(*sptr),
+		       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, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
+    save_scalar_at(sptr, flags); /* XXX - FIXME - see #60360 */
+    if (flags & SAVEf_KEEPOLDELEM)
+	return;
     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
@@ -636,6 +632,8 @@ Perl_save_helem_flags(pTHX_ HV *hv, SV *key, SV **sptr, const U32 flags)
     SSPUSHPTR(SvREFCNT_inc(*sptr));
     SSPUSHINT(SAVEt_HELEM);
     save_scalar_at(sptr, flags);
+    if (flags & SAVEf_KEEPOLDELEM)
+	return;
     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
@@ -653,22 +651,10 @@ Perl_save_svref(pTHX_ SV **sptr)
     PERL_ARGS_ASSERT_SAVE_SVREF;
 
     SvGETMAGIC(*sptr);
-    SSCHECK(3);
-    SSPUSHPTR(sptr);
-    SSPUSHPTR(SvREFCNT_inc(*sptr));
-    SSPUSHINT(SAVEt_SVREF);
+    save_pushptrptr(sptr, SvREFCNT_inc(*sptr), SAVEt_SVREF);
     return save_scalar_at(sptr, SAVEf_SETMAGIC); /* XXX - FIXME - see #60360 */
 }
 
-void
-Perl_save_op(pTHX)
-{
-    dVAR;
-    SSCHECK(2);
-    SSPUSHPTR(PL_op);
-    SSPUSHINT(SAVEt_OP);
-}
-
 I32
 Perl_save_alloc(pTHX_ I32 size, I32 pad)
 {
@@ -697,6 +683,8 @@ Perl_leave_scope(pTHX_ I32 base)
     void* ptr;
     register char* str;
     I32 i;
+    /* Localise the effects of the TAINT_NOT inside the loop.  */
+    const bool was = PL_tainted;
 
     if (base < -1)
 	Perl_croak(aTHX_ "panic: corrupt saved stack index");
@@ -905,11 +893,19 @@ Perl_leave_scope(pTHX_ I32 base)
 	case SAVEt_DELETE:
 	    ptr = SSPOPPTR;
 	    hv = MUTABLE_HV(ptr);
+	    i = SSPOPINT;
 	    ptr = SSPOPPTR;
-	    (void)hv_delete(hv, (char*)ptr, (I32)SSPOPINT, G_DISCARD);
+	    (void)hv_delete(hv, (char*)ptr, i, G_DISCARD);
 	    SvREFCNT_dec(hv);
 	    Safefree(ptr);
 	    break;
+	case SAVEt_ADELETE:
+	    ptr = SSPOPPTR;
+	    av = MUTABLE_AV(ptr);
+	    i = SSPOPINT;
+	    (void)av_delete(av, i, G_DISCARD);
+	    SvREFCNT_dec(av);
+	    break;
 	case SAVEt_DESTRUCTOR_X:
 	    ptr = SSPOPPTR;
 	    (*SSPOPDXPTR)(aTHX_ ptr);
@@ -950,19 +946,18 @@ Perl_leave_scope(pTHX_ I32 base)
 	    sv = MUTABLE_SV(SSPOPPTR);
 	    hv = MUTABLE_HV(SSPOPPTR);
 	    ptr = hv_fetch_ent(hv, sv, 1, 0);
+	    SvREFCNT_dec(sv);
 	    if (ptr) {
 		const SV * const oval = HeVAL((HE*)ptr);
 		if (oval && oval != &PL_sv_undef) {
 		    ptr = &HeVAL((HE*)ptr);
 		    if (SvTIED_mg((const SV *)hv, PERL_MAGIC_tied))
 			SvREFCNT_inc_void(*(SV**)ptr);
-		    SvREFCNT_dec(sv);
 		    av = MUTABLE_AV(hv); /* what to refcnt_dec */
 		    goto restore_sv;
 		}
 	    }
 	    SvREFCNT_dec(hv);
-	    SvREFCNT_dec(sv);
 	    SvREFCNT_dec(value);
 	    break;
 	case SAVEt_OP:
@@ -973,9 +968,9 @@ Perl_leave_scope(pTHX_ I32 base)
 		SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
 		GvHV(PL_hintgv) = NULL;
 	    }
-	    *(I32*)&PL_hints = (I32)SSPOPINT;
 	    Perl_refcounted_he_free(aTHX_ PL_compiling.cop_hints_hash);
 	    PL_compiling.cop_hints_hash = (struct refcounted_he *) SSPOPPTR;
+	    *(I32*)&PL_hints = (I32)SSPOPINT;
 	    if (PL_hints & HINT_LOCALIZE_HH) {
 		SvREFCNT_dec(MUTABLE_SV(GvHV(PL_hintgv)));
 		GvHV(PL_hintgv) = MUTABLE_HV(SSPOPPTR);
@@ -1114,6 +1109,8 @@ Perl_leave_scope(pTHX_ I32 base)
 	    Perl_croak(aTHX_ "panic: leave_scope inconsistency");
 	}
     }
+
+    PL_tainted = was;
 }
 
 void