X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=scope.c;h=fe7cb2d5b0421aecfd590b6731111468aa291a94;hb=235db74f0c7445cd9b5ee77346db17e180d32b93;hp=9bc49f90619f3de7824308666a02c253fb7b8d94;hpb=a0d0e21ea6ea90a22318550944fe6cb09ae10cda;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/scope.c b/scope.c
index 9bc49f9..fe7cb2d 100644
--- a/scope.c
+++ b/scope.c
@@ -1,6 +1,6 @@
 /*    scope.c
  *
- *    Copyright (c) 1991-1994, Larry Wall
+ *    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.
@@ -16,33 +16,27 @@
 #include "perl.h"
 
 SV**
-stack_grow(sp, p, n)
-SV** sp;
-SV** p;
-int n;
+stack_grow(SV **sp, SV **p, int n)
 {
+    dTHR;
     stack_sp = sp;
-    av_extend(stack, (p - stack_base) + (n) + 128);
-#ifdef NOTDEF
-    stack_sp = AvARRAY(stack) + (sp - stack_base);
-    stack_base = AvARRAY(stack);
-    stack_max = stack_base + AvMAX(stack) - 1;
-#endif
+    av_extend(curstack, (p - stack_base) + (n) + 128);
     return stack_sp;
 }
 
 I32
-cxinc()
+cxinc(void)
 {
+    dTHR;
     cxstack_max = cxstack_max * 3 / 2;
-    Renew(cxstack, cxstack_max, CONTEXT);
+    Renew(cxstack, cxstack_max + 1, CONTEXT);	/* XXX should fix CXINC macro */
     return cxstack_ix + 1;
 }
 
 void
-push_return(retop)
-OP *retop;
+push_return(OP *retop)
 {
+    dTHR;
     if (retstack_ix == retstack_max) {
 	retstack_max = retstack_max * 3 / 2;
 	Renew(retstack, retstack_max, OP*);
@@ -51,8 +45,9 @@ OP *retop;
 }
 
 OP *
-pop_return()
+pop_return(void)
 {
+    dTHR;
     if (retstack_ix > 0)
 	return retstack[--retstack_ix];
     else
@@ -60,8 +55,9 @@ pop_return()
 }
 
 void
-push_scope()
+push_scope(void)
 {
+    dTHR;
     if (scopestack_ix == scopestack_max) {
 	scopestack_max = scopestack_max * 3 / 2;
 	Renew(scopestack, scopestack_max, I32);
@@ -71,15 +67,17 @@ push_scope()
 }
 
 void
-pop_scope()
+pop_scope(void)
 {
+    dTHR;
     I32 oldsave = scopestack[--scopestack_ix];
     LEAVE_SCOPE(oldsave);
 }
 
 void
-markstack_grow()
+markstack_grow(void)
 {
+    dTHR;
     I32 oldmax = markstack_max - markstack;
     I32 newmax = oldmax * 3 / 2;
 
@@ -89,15 +87,17 @@ markstack_grow()
 }
 
 void
-savestack_grow()
+savestack_grow(void)
 {
+    dTHR;
     savestack_max = savestack_max * 3 / 2;
     Renew(savestack, savestack_max, ANY);
 }
 
 void
-free_tmps()
+free_tmps(void)
 {
+    dTHR;
     /* XXX should tmps_floor live in cxstack? */
     I32 myfloor = tmps_floor;
     while (tmps_ix > myfloor) {      /* clean up after last statement */
@@ -112,116 +112,141 @@ free_tmps()
     }
 }
 
-SV *
-save_scalar(gv)
-GV *gv;
+static SV *
+save_scalar_at(SV **sptr)
 {
+    dTHR;
     register SV *sv;
-    SV *osv = GvSV(gv);
-
-    SSCHECK(3);
-    SSPUSHPTR(gv);
-    SSPUSHPTR(osv);
-    SSPUSHINT(SAVEt_SV);
+    SV *osv = *sptr;
 
-    sv = GvSV(gv) = NEWSV(0,0);
+    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 = tainted;
 	    mg_get(osv);
+	    if (tainting && 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;
+	    tainted = oldtainted;
 	}
 	SvMAGIC(sv) = SvMAGIC(osv);
 	SvFLAGS(sv) |= SvMAGICAL(osv);
-	localizing = TRUE;
+	localizing = 1;
 	SvSETMAGIC(sv);
-	localizing = FALSE;
+	localizing = 0;
     }
     return sv;
 }
 
-#ifdef INLINED_ELSEWHERE
-void
-save_gp(gv)
-GV *gv;
+SV *
+save_scalar(GV *gv)
 {
-    register GP *gp;
-    GP *ogp = GvGP(gv);
-
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(gv);
-    SSPUSHPTR(ogp);
-    SSPUSHINT(SAVEt_GP);
-
-    Newz(602,gp, 1, GP);
-    GvGP(gv) = gp;
-    GvREFCNT(gv) = 1;
-    GvSV(gv) = NEWSV(72,0);
-    GvLINE(gv) = curcop->cop_line;
-    GvEGV(gv) = gv;
+    SSPUSHPTR(GvSV(gv));
+    SSPUSHINT(SAVEt_SV);
+    return save_scalar_at(&GvSV(gv));
 }
-#endif
 
 SV*
-save_svref(sptr)
-SV **sptr;
+save_svref(SV **sptr)
 {
-    register SV *sv;
-    SV *osv = *sptr;
-
+    dTHR;
     SSCHECK(3);
-    SSPUSHPTR(*sptr);
     SSPUSHPTR(sptr);
+    SSPUSHPTR(*sptr);
     SSPUSHINT(SAVEt_SVREF);
+    return save_scalar_at(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)) {
-	    mg_get(osv);
-	    SvFLAGS(osv) |= (SvFLAGS(osv) &
-		(SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
-	}
-	SvMAGIC(sv) = SvMAGIC(osv);
-	SvFLAGS(sv) |= SvMAGICAL(osv);
-	localizing = TRUE;
-	SvSETMAGIC(sv);
-	localizing = FALSE;
+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;
+	Newz(602, gp, 1, GP);
+	GvGP(gv) = gp_ref(gp);
+	GvSV(gv) = NEWSV(72,0);
+	GvLINE(gv) = curcop->cop_line;
+	GvEGV(gv) = gv;
+    }
+    else {
+	gp_ref(GvGP(gv));
+	GvINTRO_on(gv);
     }
-    return sv;
 }
 
 AV *
-save_ary(gv)
-GV *gv;
+save_ary(GV *gv)
 {
+    dTHR;
+    AV *oav, *av;
+
     SSCHECK(3);
     SSPUSHPTR(gv);
-    SSPUSHPTR(GvAVn(gv));
+    SSPUSHPTR(oav = GvAVn(gv));
     SSPUSHINT(SAVEt_AV);
 
     GvAV(gv) = Null(AV*);
-    return GvAVn(gv);
+    av = GvAVn(gv);
+    if (SvMAGIC(oav)) {
+	SvMAGIC(av) = SvMAGIC(oav);
+	SvFLAGS(av) |= SvMAGICAL(oav);
+	SvMAGICAL_off(oav);
+	SvMAGIC(oav) = 0;
+	localizing = 1;
+	SvSETMAGIC((SV*)av);
+	localizing = 0;
+    }
+    return av;
 }
 
 HV *
-save_hash(gv)
-GV *gv;
+save_hash(GV *gv)
 {
+    dTHR;
+    HV *ohv, *hv;
+
     SSCHECK(3);
     SSPUSHPTR(gv);
-    SSPUSHPTR(GvHVn(gv));
+    SSPUSHPTR(ohv = GvHVn(gv));
     SSPUSHINT(SAVEt_HV);
 
     GvHV(gv) = Null(HV*);
-    return GvHVn(gv);
+    hv = GvHVn(gv);
+    if (SvMAGIC(ohv)) {
+	SvMAGIC(hv) = SvMAGIC(ohv);
+	SvFLAGS(hv) |= SvMAGICAL(ohv);
+	SvMAGICAL_off(ohv);
+	SvMAGIC(ohv) = 0;
+	localizing = 1;
+	SvSETMAGIC((SV*)hv);
+	localizing = 0;
+    }
+    return hv;
 }
 
 void
-save_item(item)
-register SV *item;
+save_item(register SV *item)
 {
+    dTHR;
     register SV *sv;
 
     SSCHECK(3);
@@ -233,9 +258,9 @@ register SV *item;
 }
 
 void
-save_int(intp)
-int *intp;
+save_int(int *intp)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -243,9 +268,9 @@ int *intp;
 }
 
 void
-save_long(longp)
-long *longp;
+save_long(long int *longp)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHLONG(*longp);
     SSPUSHPTR(longp);
@@ -253,9 +278,9 @@ long *longp;
 }
 
 void
-save_I32(intp)
-I32 *intp;
+save_I32(I32 *intp)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -263,11 +288,21 @@ I32 *intp;
 }
 
 void
-save_iv(ivp)
-IV *ivp;
+save_I16(I16 *intp)
+{
+    dTHR;
+    SSCHECK(3);
+    SSPUSHINT(*intp);
+    SSPUSHPTR(intp);
+    SSPUSHINT(SAVEt_I16);
+}
+
+void
+save_iv(IV *ivp)
 {
+    dTHR;
     SSCHECK(3);
-    SSPUSHINT(*ivp);
+    SSPUSHIV(*ivp);
     SSPUSHPTR(ivp);
     SSPUSHINT(SAVEt_IV);
 }
@@ -276,9 +311,9 @@ IV *ivp;
  * force word-alignment and we'll miss the pointer.
  */
 void
-save_pptr(pptr)
-char **pptr;
+save_pptr(char **pptr)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(*pptr);
     SSPUSHPTR(pptr);
@@ -286,9 +321,9 @@ char **pptr;
 }
 
 void
-save_sptr(sptr)
-SV **sptr;
+save_sptr(SV **sptr)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(*sptr);
     SSPUSHPTR(sptr);
@@ -296,18 +331,18 @@ SV **sptr;
 }
 
 void
-save_nogv(gv)
-GV *gv;
+save_nogv(GV *gv)
 {
+    dTHR;
     SSCHECK(2);
     SSPUSHPTR(gv);
     SSPUSHINT(SAVEt_NSTAB);
 }
 
 void
-save_hptr(hptr)
-HV **hptr;
+save_hptr(HV **hptr)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(*hptr);
     SSPUSHPTR(hptr);
@@ -315,9 +350,9 @@ HV **hptr;
 }
 
 void
-save_aptr(aptr)
-AV **aptr;
+save_aptr(AV **aptr)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(*aptr);
     SSPUSHPTR(aptr);
@@ -325,47 +360,45 @@ AV **aptr;
 }
 
 void
-save_freesv(sv)
-SV *sv;
+save_freesv(SV *sv)
 {
+    dTHR;
     SSCHECK(2);
     SSPUSHPTR(sv);
     SSPUSHINT(SAVEt_FREESV);
 }
 
 void
-save_freeop(op)
-OP *op;
+save_freeop(OP *o)
 {
+    dTHR;
     SSCHECK(2);
-    SSPUSHPTR(op);
+    SSPUSHPTR(o);
     SSPUSHINT(SAVEt_FREEOP);
 }
 
 void
-save_freepv(pv)
-char *pv;
+save_freepv(char *pv)
 {
+    dTHR;
     SSCHECK(2);
     SSPUSHPTR(pv);
     SSPUSHINT(SAVEt_FREEPV);
 }
 
 void
-save_clearsv(svp)
-SV** svp;
+save_clearsv(SV **svp)
 {
+    dTHR;
     SSCHECK(2);
-    SSPUSHPTR(svp);
+    SSPUSHLONG((long)(svp-curpad));
     SSPUSHINT(SAVEt_CLEARSV);
 }
 
 void
-save_delete(hv,key,klen)
-HV *hv;
-char *key;
-I32 klen;
+save_delete(HV *hv, char *key, I32 klen)
 {
+    dTHR;
     SSCHECK(4);
     SSPUSHINT(klen);
     SSPUSHPTR(key);
@@ -374,10 +407,9 @@ I32 klen;
 }
 
 void
-save_list(sarg,maxsarg)
-register SV **sarg;
-I32 maxsarg;
+save_list(register SV **sarg, I32 maxsarg)
 {
+    dTHR;
     register SV *sv;
     register I32 i;
 
@@ -392,10 +424,9 @@ I32 maxsarg;
 }
 
 void
-save_destructor(f,p)
-void (*f) _((void*));
-void* p;
+save_destructor(void (*f) (void *), void *p)
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHDPTR(f);
     SSPUSHPTR(p);
@@ -403,9 +434,18 @@ void* p;
 }
 
 void
-leave_scope(base)
-I32 base;
+save_op(void)
+{
+    dTHR;
+    SSCHECK(2);
+    SSPUSHPTR(op);
+    SSPUSHINT(SAVEt_OP);
+}
+
+void
+leave_scope(I32 base)
 {
+    dTHR;
     register SV *sv;
     register SV *value;
     register GV *gv;
@@ -421,55 +461,78 @@ I32 base;
 	    value = (SV*)SSPOPPTR;
 	    sv = (SV*)SSPOPPTR;
 	    sv_replace(sv,value);
-	    localizing = TRUE;
+	    localizing = 2;
 	    SvSETMAGIC(sv);
-	    localizing = FALSE;
+	    localizing = 0;
 	    break;
         case SAVEt_SV:				/* scalar reference */
 	    value = (SV*)SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
-	    sv = GvSV(gv);
-	    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;
-	    }
-            SvREFCNT_dec(sv);
-            GvSV(gv) = value;
-	    localizing = TRUE;
-	    SvSETMAGIC(value);
-	    localizing = FALSE;
-            break;
+	    ptr = &GvSV(gv);
+	    goto restore_sv;
         case SAVEt_SVREF:			/* scalar reference */
+	    value = (SV*)SSPOPPTR;
 	    ptr = SSPOPPTR;
+	restore_sv:
 	    sv = *(SV**)ptr;
-	    value = (SV*)SSPOPPTR;
-	    if (SvTYPE(sv) >= SVt_PVMG && SvTYPE(sv) != SVt_PVGV) {
+	    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;
-	    localizing = TRUE;
+	    localizing = 2;
 	    SvSETMAGIC(value);
-	    localizing = FALSE;
+	    localizing = 0;
             break;
         case SAVEt_AV:				/* array reference */
 	    av = (AV*)SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
-            SvREFCNT_dec(GvAV(gv));
+	    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)) {
+		localizing = 2;
+		SvSETMAGIC((SV*)av);
+		localizing = 0;
+	    }
             break;
         case SAVEt_HV:				/* hash reference */
 	    hv = (HV*)SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
-            SvREFCNT_dec(GvHV(gv));
+	    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)) {
+		localizing = 2;
+		SvSETMAGIC((SV*)hv);
+		localizing = 0;
+	    }
             break;
 	case SAVEt_INT:				/* int reference */
 	    ptr = SSPOPPTR;
@@ -483,6 +546,10 @@ I32 base;
 	    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;
@@ -505,13 +572,20 @@ I32 base;
 	    break;
 	case SAVEt_NSTAB:
 	    gv = (GV*)SSPOPPTR;
-	    (void)sv_clear(gv);
+	    (void)sv_clear((SV*)gv);
 	    break;
-        case SAVEt_GP:				/* scalar reference */
+	case SAVEt_GP:				/* scalar reference */
 	    ptr = SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
             gp_free(gv);
             GvGP(gv) = (GP*)ptr;
+            if (SvPOK(gv) && SvLEN(gv) > 0) {
+                Safefree(SvPVX(gv));
+            }
+            SvPVX(gv) = (char *)SSPOPPTR;
+            SvCUR(gv) = (STRLEN)SSPOPIV;
+            SvLEN(gv) = (STRLEN)SSPOPIV;
+	    SvREFCNT_dec(gv);
             break;
 	case SAVEt_FREESV:
 	    ptr = SSPOPPTR;
@@ -519,7 +593,8 @@ I32 base;
 	    break;
 	case SAVEt_FREEOP:
 	    ptr = SSPOPPTR;
-	    curpad = AvARRAY(comppad);
+	    if (comppad)
+		curpad = AvARRAY(comppad);
 	    op_free((OP*)ptr);
 	    break;
 	case SAVEt_FREEPV:
@@ -527,9 +602,10 @@ I32 base;
 	    Safefree((char*)ptr);
 	    break;
 	case SAVEt_CLEARSV:
-	    ptr = SSPOPPTR;
+	    ptr = (void*)&curpad[SSPOPLONG];
 	    sv = *(SV**)ptr;
-	    if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
+	    /* Can clear pad variable in place? */
+	    if (SvREFCNT(sv) <= 1 && !SvOBJECT(sv)) {
 		if (SvTHINKFIRST(sv)) {
 		    if (SvREADONLY(sv))
 			croak("panic: leave_scope clearsv");
@@ -549,37 +625,54 @@ I32 base;
 		    hv_clear((HV*)sv);
 		    break;
 		case SVt_PVCV:
-		    sub_generation++;
-		    cv_undef((CV*)sv);
+		    croak("panic: leave_scope pad code");
+		case SVt_RV:
+		case SVt_IV:
+		case SVt_NV:
+		    (void)SvOK_off(sv);
 		    break;
 		default:
-		    if (SvPOK(sv) && SvLEN(sv))
-			(void)SvOOK_off(sv);
 		    (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);
 		SvREFCNT_dec(sv);	/* Cast current value to the winds. */
 		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;
 		}
+		SvFLAGS(*(SV**)ptr) |= padflags; /* preserve pad nature */
 	    }
 	    break;
 	case SAVEt_DELETE:
 	    ptr = SSPOPPTR;
 	    hv = (HV*)ptr;
 	    ptr = SSPOPPTR;
-	    hv_delete(hv, (char*)ptr, (U32)SSPOPINT);
+	    (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
+	    Safefree(ptr);
 	    break;
 	case SAVEt_DESTRUCTOR:
 	    ptr = SSPOPPTR;
 	    (*SSPOPDPTR)(ptr);
 	    break;
 	case SAVEt_REGCONTEXT:
-	    savestack_ix -= SSPOPINT;	/* regexp must have croaked */
+	    {
+		I32 delta = SSPOPINT;
+		savestack_ix -= delta;	/* regexp must have croaked */
+	    }
+	    break;
+	case SAVEt_STACK_POS:		/* Position on Perl stack */
+	    {
+		I32 delta = SSPOPINT;
+		stack_sp = stack_base + delta;
+	    }
+	    break;
+	case SAVEt_OP:
+	    op = (OP*)SSPOPPTR;
 	    break;
 	default:
 	    croak("panic: leave_scope inconsistency");
@@ -588,92 +681,96 @@ I32 base;
 }
 
 #ifdef DEBUGGING
+
 void
-cx_dump(cx)
-CONTEXT* cx;
+cx_dump(CONTEXT *cx)
 {
-    fprintf(stderr, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
+    dTHR;
+    PerlIO_printf(Perl_debug_log, "CX %ld = %s\n", (long)(cx - cxstack), block_type[cx->cx_type]);
     if (cx->cx_type != CXt_SUBST) {
-	fprintf(stderr, "BLK_OLDSP = %ld\n", (long)cx->blk_oldsp);
-	fprintf(stderr, "BLK_OLDCOP = 0x%lx\n", (long)cx->blk_oldcop);
-	fprintf(stderr, "BLK_OLDMARKSP = %ld\n", (long)cx->blk_oldmarksp);
-	fprintf(stderr, "BLK_OLDSCOPESP = %ld\n", (long)cx->blk_oldscopesp);
-	fprintf(stderr, "BLK_OLDRETSP = %ld\n", (long)cx->blk_oldretsp);
-	fprintf(stderr, "BLK_OLDPM = 0x%lx\n", (long)cx->blk_oldpm);
-	fprintf(stderr, "BLK_GIMME = %s\n", cx->blk_gimme ? "LIST" : "SCALAR");
+	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:
-	fprintf(stderr, "BLK_SUB.CV = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
 		(long)cx->blk_sub.cv);
-	fprintf(stderr, "BLK_SUB.GV = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
 		(long)cx->blk_sub.gv);
-	fprintf(stderr, "BLK_SUB.DFOUTGV = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
 		(long)cx->blk_sub.dfoutgv);
-	fprintf(stderr, "BLK_SUB.OLDDEPTH = %ld\n",
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
 		(long)cx->blk_sub.olddepth);
-	fprintf(stderr, "BLK_SUB.HASARGS = %d\n",
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
 		(int)cx->blk_sub.hasargs);
 	break;
     case CXt_EVAL:
-	fprintf(stderr, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
+	PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
 		(long)cx->blk_eval.old_in_eval);
-	fprintf(stderr, "BLK_EVAL.OLD_OP_TYPE = %s\n",
-		op_name[cx->blk_eval.old_op_type]);
-	fprintf(stderr, "BLK_EVAL.OLD_NAME = %s\n",
+	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);
-	fprintf(stderr, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
 		(long)cx->blk_eval.old_eval_root);
 	break;
 
     case CXt_LOOP:
-	fprintf(stderr, "BLK_LOOP.LABEL = %s\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
 		cx->blk_loop.label);
-	fprintf(stderr, "BLK_LOOP.RESETSP = %ld\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
 		(long)cx->blk_loop.resetsp);
-	fprintf(stderr, "BLK_LOOP.REDO_OP = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
 		(long)cx->blk_loop.redo_op);
-	fprintf(stderr, "BLK_LOOP.NEXT_OP = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
 		(long)cx->blk_loop.next_op);
-	fprintf(stderr, "BLK_LOOP.LAST_OP = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
 		(long)cx->blk_loop.last_op);
-	fprintf(stderr, "BLK_LOOP.ITERIX = %ld\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
 		(long)cx->blk_loop.iterix);
-	fprintf(stderr, "BLK_LOOP.ITERARY = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
 		(long)cx->blk_loop.iterary);
-	fprintf(stderr, "BLK_LOOP.ITERVAR = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
 		(long)cx->blk_loop.itervar);
 	if (cx->blk_loop.itervar)
-	    fprintf(stderr, "BLK_LOOP.ITERSAVE = 0x%lx\n",
+	    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:
-	fprintf(stderr, "SB_ITERS = %ld\n",
+	PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
 		(long)cx->sb_iters);
-	fprintf(stderr, "SB_MAXITERS = %ld\n",
+	PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
 		(long)cx->sb_maxiters);
-	fprintf(stderr, "SB_SAFEBASE = %ld\n",
+	PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
 		(long)cx->sb_safebase);
-	fprintf(stderr, "SB_ONCE = %ld\n",
+	PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
 		(long)cx->sb_once);
-	fprintf(stderr, "SB_ORIG = %s\n",
+	PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
 		cx->sb_orig);
-	fprintf(stderr, "SB_DSTR = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
 		(long)cx->sb_dstr);
-	fprintf(stderr, "SB_TARG = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
 		(long)cx->sb_targ);
-	fprintf(stderr, "SB_S = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
 		(long)cx->sb_s);
-	fprintf(stderr, "SB_M = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
 		(long)cx->sb_m);
-	fprintf(stderr, "SB_STREND = 0x%lx\n",
+	PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
 		(long)cx->sb_strend);
-	fprintf(stderr, "SB_SUBBASE = 0x%lx\n",
-		(long)cx->sb_subbase);
+	PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%lx\n",
+		(long)cx->sb_rxres);
 	break;
     }
 }