X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=scope.c;h=01b1fa9f5962c91cbcac306f2c281b94b017f224;hb=6d4ff0d2f86d3c242b3f29bee3c2734df9ab8a3a;hp=7a891c4e427f3756f61e0863d85a9917587a9296;hpb=93a17b20b6d176db3f04f51a63b0a781e5ffd11c;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/scope.c b/scope.c
index 7a891c4..01b1fa9 100644
--- a/scope.c
+++ b/scope.c
@@ -1,21 +1,38 @@
-/* $RCSfile: op.c,v $$Revision: 4.1 $$Date: 92/08/07 17:19:16 $
+/*    scope.c
  *
- *    Copyright (c) 1991, 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.
  *
- * $Log:	op.c,v $
+ */
+
+/*
+ * "For the fashion of Minas Tirith was such that it was built on seven
+ * levels..."
  */
 
 #include "EXTERN.h"
 #include "perl.h"
 
+SV**
+stack_grow(sp, p, n)
+SV** sp;
+SV** p;
+int n;
+{
+    dTHR;
+    stack_sp = sp;
+    av_extend(curstack, (p - stack_base) + (n) + 128);
+    return stack_sp;
+}
+
 I32
 cxinc()
 {
+    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;
 }
 
@@ -23,6 +40,7 @@ void
 push_return(retop)
 OP *retop;
 {
+    dTHR;
     if (retstack_ix == retstack_max) {
 	retstack_max = retstack_max * 3 / 2;
 	Renew(retstack, retstack_max, OP*);
@@ -33,6 +51,7 @@ OP *retop;
 OP *
 pop_return()
 {
+    dTHR;
     if (retstack_ix > 0)
 	return retstack[--retstack_ix];
     else
@@ -42,6 +61,7 @@ pop_return()
 void
 push_scope()
 {
+    dTHR;
     if (scopestack_ix == scopestack_max) {
 	scopestack_max = scopestack_max * 3 / 2;
 	Renew(scopestack, scopestack_max, I32);
@@ -53,14 +73,27 @@ push_scope()
 void
 pop_scope()
 {
+    dTHR;
     I32 oldsave = scopestack[--scopestack_ix];
-    if (savestack_ix > oldsave)
-	leave_scope(oldsave);
+    LEAVE_SCOPE(oldsave);
+}
+
+void
+markstack_grow()
+{
+    dTHR;
+    I32 oldmax = markstack_max - markstack;
+    I32 newmax = oldmax * 3 / 2;
+
+    Renew(markstack, newmax, I32);
+    markstack_ptr = markstack + oldmax;
+    markstack_max = markstack + newmax;
 }
 
 void
 savestack_grow()
 {
+    dTHR;
     savestack_max = savestack_max * 3 / 2;
     Renew(savestack, savestack_max, ANY);
 }
@@ -68,88 +101,107 @@ savestack_grow()
 void
 free_tmps()
 {
+    dTHR;
     /* XXX should tmps_floor live in cxstack? */
     I32 myfloor = tmps_floor;
     while (tmps_ix > myfloor) {      /* clean up after last statement */
 	SV* sv = tmps_stack[tmps_ix];
 	tmps_stack[tmps_ix--] = Nullsv;
-	if (sv)
-	    sv_free(sv);		/* note, can modify tmps_ix!!! */
+	if (sv) {
+#ifdef DEBUGGING
+	    SvTEMP_off(sv);
+#endif
+	    SvREFCNT_dec(sv);		/* note, can modify tmps_ix!!! */
+	}
     }
 }
 
-SV *
-save_scalar(gv)
-GV *gv;
+static SV *
+save_scalar_at(sptr)
+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);
-    if (SvTYPE(osv) >= SVt_PVMG && SvMAGIC(osv)) {
+    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);
-	localizing = TRUE;
+	SvFLAGS(sv) |= SvMAGICAL(osv);
+	localizing = 1;
 	SvSETMAGIC(sv);
-	localizing = FALSE;
+	localizing = 0;
     }
     return sv;
 }
 
-#ifdef INLINED_ELSEWHERE
-void
-save_gp(gv)
+SV *
+save_scalar(gv)
 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;
 {
-    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(sv)) {
-	sv_upgrade(sv, SvTYPE(osv));
-	SvMAGIC(sv) = SvMAGIC(osv);
-	localizing = TRUE;
-	SvSETMAGIC(sv);
-	localizing = FALSE;
+void
+save_gp(gv, empty)
+GV *gv;
+I32 empty;
+{
+    dTHR;
+    SSCHECK(3);
+    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;
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(gv);
     SSPUSHPTR(GvAVn(gv));
@@ -163,6 +215,7 @@ HV *
 save_hash(gv)
 GV *gv;
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(gv);
     SSPUSHPTR(GvHVn(gv));
@@ -176,6 +229,7 @@ void
 save_item(item)
 register SV *item;
 {
+    dTHR;
     register SV *sv;
 
     SSCHECK(3);
@@ -190,6 +244,7 @@ void
 save_int(intp)
 int *intp;
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -197,9 +252,21 @@ int *intp;
 }
 
 void
+save_long(longp)
+long *longp;
+{
+    dTHR;
+    SSCHECK(3);
+    SSPUSHLONG(*longp);
+    SSPUSHPTR(longp);
+    SSPUSHINT(SAVEt_LONG);
+}
+
+void
 save_I32(intp)
 I32 *intp;
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHINT(*intp);
     SSPUSHPTR(intp);
@@ -207,9 +274,46 @@ I32 *intp;
 }
 
 void
+save_I16(intp)
+I16 *intp;
+{
+    dTHR;
+    SSCHECK(3);
+    SSPUSHINT(*intp);
+    SSPUSHPTR(intp);
+    SSPUSHINT(SAVEt_I16);
+}
+
+void
+save_iv(ivp)
+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
+save_pptr(pptr)
+char **pptr;
+{
+    dTHR;
+    SSCHECK(3);
+    SSPUSHPTR(*pptr);
+    SSPUSHPTR(pptr);
+    SSPUSHINT(SAVEt_PPTR);
+}
+
+void
 save_sptr(sptr)
 SV **sptr;
 {
+    dTHR;
     SSCHECK(3);
     SSPUSHPTR(*sptr);
     SSPUSHPTR(sptr);
@@ -220,6 +324,7 @@ void
 save_nogv(gv)
 GV *gv;
 {
+    dTHR;
     SSCHECK(2);
     SSPUSHPTR(gv);
     SSPUSHINT(SAVEt_NSTAB);
@@ -229,8 +334,9 @@ void
 save_hptr(hptr)
 HV **hptr;
 {
+    dTHR;
     SSCHECK(3);
-    SSPUSHINT(*hptr);
+    SSPUSHPTR(*hptr);
     SSPUSHPTR(hptr);
     SSPUSHINT(SAVEt_HPTR);
 }
@@ -239,17 +345,73 @@ void
 save_aptr(aptr)
 AV **aptr;
 {
+    dTHR;
     SSCHECK(3);
-    SSPUSHINT(*aptr);
+    SSPUSHPTR(*aptr);
     SSPUSHPTR(aptr);
     SSPUSHINT(SAVEt_APTR);
 }
 
 void
+save_freesv(sv)
+SV *sv;
+{
+    dTHR;
+    SSCHECK(2);
+    SSPUSHPTR(sv);
+    SSPUSHINT(SAVEt_FREESV);
+}
+
+void
+save_freeop(o)
+OP *o;
+{
+    dTHR;
+    SSCHECK(2);
+    SSPUSHPTR(o);
+    SSPUSHINT(SAVEt_FREEOP);
+}
+
+void
+save_freepv(pv)
+char *pv;
+{
+    dTHR;
+    SSCHECK(2);
+    SSPUSHPTR(pv);
+    SSPUSHINT(SAVEt_FREEPV);
+}
+
+void
+save_clearsv(svp)
+SV** svp;
+{
+    dTHR;
+    SSCHECK(2);
+    SSPUSHLONG((long)(svp-curpad));
+    SSPUSHINT(SAVEt_CLEARSV);
+}
+
+void
+save_delete(hv,key,klen)
+HV *hv;
+char *key;
+I32 klen;
+{
+    dTHR;
+    SSCHECK(4);
+    SSPUSHINT(klen);
+    SSPUSHPTR(key);
+    SSPUSHPTR(hv);
+    SSPUSHINT(SAVEt_DELETE);
+}
+
+void
 save_list(sarg,maxsarg)
 register SV **sarg;
 I32 maxsarg;
 {
+    dTHR;
     register SV *sv;
     register I32 i;
 
@@ -264,9 +426,31 @@ I32 maxsarg;
 }
 
 void
+save_destructor(f,p)
+void (*f) _((void*));
+void* p;
+{
+    dTHR;
+    SSCHECK(3);
+    SSPUSHDPTR(f);
+    SSPUSHPTR(p);
+    SSPUSHINT(SAVEt_DESTRUCTOR);
+}
+
+void
+save_op()
+{
+    dTHR;
+    SSCHECK(2);
+    SSPUSHPTR(op);
+    SSPUSHINT(SAVEt_OP);
+}
+
+void
 leave_scope(base)
 I32 base;
 {
+    dTHR;
     register SV *sv;
     register SV *value;
     register GV *gv;
@@ -275,58 +459,90 @@ I32 base;
     register void* ptr;
 
     if (base < -1)
-	fatal("panic: corrupt saved stack index");
+	croak("panic: corrupt saved stack index");
     while (savestack_ix > base) {
 	switch (SSPOPINT) {
 	case SAVEt_ITEM:			/* normal string */
 	    value = (SV*)SSPOPPTR;
 	    sv = (SV*)SSPOPPTR;
 	    sv_replace(sv,value);
+	    localizing = 2;
 	    SvSETMAGIC(sv);
+	    localizing = 0;
 	    break;
         case SAVEt_SV:				/* scalar reference */
 	    value = (SV*)SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
-	    sv = GvSV(gv);
-	    if (SvTYPE(sv) >= SVt_PVMG)
-		SvMAGIC(sv) = 0;
-            sv_free(sv);
-            GvSV(gv) = sv = value;
-	    SvSETMAGIC(sv);
-            break;
+	    ptr = &GvSV(gv);
+	    goto restore_sv;
         case SAVEt_SVREF:			/* scalar reference */
+	    value = (SV*)SSPOPPTR;
 	    ptr = SSPOPPTR;
+	restore_sv:
 	    sv = *(SV**)ptr;
-	    if (SvTYPE(sv) >= SVt_PVMG)
+	    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;
-            sv_free(sv);
-	    *(SV**)ptr = sv = (SV*)SSPOPPTR;
-	    SvSETMAGIC(sv);
+	    }
+	    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 = 2;
+	    SvSETMAGIC(value);
+	    localizing = 0;
             break;
         case SAVEt_AV:				/* array reference */
 	    av = (AV*)SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
-            av_free(GvAV(gv));
+            SvREFCNT_dec(GvAV(gv));
             GvAV(gv) = av;
             break;
         case SAVEt_HV:				/* hash reference */
 	    hv = (HV*)SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
-            (void)hv_free(GvHV(gv), FALSE);
+            SvREFCNT_dec(GvHV(gv));
             GvHV(gv) = hv;
             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_IV:				/* IV reference */
+	    ptr = SSPOPPTR;
+	    *(IV*)ptr = (IV)SSPOPIV;
+	    break;
 	case SAVEt_SPTR:			/* SV* reference */
 	    ptr = SSPOPPTR;
 	    *(SV**)ptr = (SV*)SSPOPPTR;
 	    break;
+	case SAVEt_PPTR:			/* char* reference */
+	    ptr = SSPOPPTR;
+	    *(char**)ptr = (char*)SSPOPPTR;
+	    break;
 	case SAVEt_HPTR:			/* HV* reference */
 	    ptr = SSPOPPTR;
 	    *(HV**)ptr = (HV*)SSPOPPTR;
@@ -337,16 +553,200 @@ I32 base;
 	    break;
 	case SAVEt_NSTAB:
 	    gv = (GV*)SSPOPPTR;
-	    (void)sv_clear(gv);
+	    (void)sv_clear((SV*)gv);
 	    break;
         case SAVEt_GP:				/* scalar reference */
 	    ptr = SSPOPPTR;
 	    gv = (GV*)SSPOPPTR;
             gp_free(gv);
             GvGP(gv) = (GP*)ptr;
+	    SvREFCNT_dec(gv);
             break;
+	case SAVEt_FREESV:
+	    ptr = SSPOPPTR;
+	    SvREFCNT_dec((SV*)ptr);
+	    break;
+	case SAVEt_FREEOP:
+	    ptr = SSPOPPTR;
+	    if (comppad)
+		curpad = AvARRAY(comppad);
+	    op_free((OP*)ptr);
+	    break;
+	case SAVEt_FREEPV:
+	    ptr = SSPOPPTR;
+	    Safefree((char*)ptr);
+	    break;
+	case SAVEt_CLEARSV:
+	    ptr = (void*)&curpad[SSPOPLONG];
+	    sv = *(SV**)ptr;
+	    if (SvREFCNT(sv) <= 1) { /* Can clear pad variable in place. */
+		if (SvTHINKFIRST(sv)) {
+		    if (SvREADONLY(sv))
+			croak("panic: leave_scope clearsv");
+		    if (SvROK(sv))
+			sv_unref(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:
+		    croak("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);
+		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;
+	    (void)hv_delete(hv, (char*)ptr, (U32)SSPOPINT, G_DISCARD);
+	    Safefree(ptr);
+	    break;
+	case SAVEt_DESTRUCTOR:
+	    ptr = SSPOPPTR;
+	    (*SSPOPDPTR)(ptr);
+	    break;
+	case SAVEt_REGCONTEXT:
+	    {
+		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:
-	    fatal("panic: leave_scope inconsistency");
+	    croak("panic: leave_scope inconsistency");
 	}
     }
 }
+
+#ifdef DEBUGGING
+
+void
+cx_dump(cx)
+CONTEXT* cx;
+{
+    dTHR;
+    PerlIO_printf(Perl_debug_log, "CX %d = %s\n", cx - cxstack, block_type[cx->cx_type]);
+    if (cx->cx_type != CXt_SUBST) {
+	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:
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.CV = 0x%lx\n",
+		(long)cx->blk_sub.cv);
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.GV = 0x%lx\n",
+		(long)cx->blk_sub.gv);
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.DFOUTGV = 0x%lx\n",
+		(long)cx->blk_sub.dfoutgv);
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.OLDDEPTH = %ld\n",
+		(long)cx->blk_sub.olddepth);
+	PerlIO_printf(Perl_debug_log, "BLK_SUB.HASARGS = %d\n",
+		(int)cx->blk_sub.hasargs);
+	break;
+    case CXt_EVAL:
+	PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_IN_EVAL = %ld\n",
+		(long)cx->blk_eval.old_in_eval);
+	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);
+	PerlIO_printf(Perl_debug_log, "BLK_EVAL.OLD_EVAL_ROOT = 0x%lx\n",
+		(long)cx->blk_eval.old_eval_root);
+	break;
+
+    case CXt_LOOP:
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.LABEL = %s\n",
+		cx->blk_loop.label);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.RESETSP = %ld\n",
+		(long)cx->blk_loop.resetsp);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.REDO_OP = 0x%lx\n",
+		(long)cx->blk_loop.redo_op);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.NEXT_OP = 0x%lx\n",
+		(long)cx->blk_loop.next_op);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.LAST_OP = 0x%lx\n",
+		(long)cx->blk_loop.last_op);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERIX = %ld\n",
+		(long)cx->blk_loop.iterix);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERARY = 0x%lx\n",
+		(long)cx->blk_loop.iterary);
+	PerlIO_printf(Perl_debug_log, "BLK_LOOP.ITERVAR = 0x%lx\n",
+		(long)cx->blk_loop.itervar);
+	if (cx->blk_loop.itervar)
+	    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:
+	PerlIO_printf(Perl_debug_log, "SB_ITERS = %ld\n",
+		(long)cx->sb_iters);
+	PerlIO_printf(Perl_debug_log, "SB_MAXITERS = %ld\n",
+		(long)cx->sb_maxiters);
+	PerlIO_printf(Perl_debug_log, "SB_SAFEBASE = %ld\n",
+		(long)cx->sb_safebase);
+	PerlIO_printf(Perl_debug_log, "SB_ONCE = %ld\n",
+		(long)cx->sb_once);
+	PerlIO_printf(Perl_debug_log, "SB_ORIG = %s\n",
+		cx->sb_orig);
+	PerlIO_printf(Perl_debug_log, "SB_DSTR = 0x%lx\n",
+		(long)cx->sb_dstr);
+	PerlIO_printf(Perl_debug_log, "SB_TARG = 0x%lx\n",
+		(long)cx->sb_targ);
+	PerlIO_printf(Perl_debug_log, "SB_S = 0x%lx\n",
+		(long)cx->sb_s);
+	PerlIO_printf(Perl_debug_log, "SB_M = 0x%lx\n",
+		(long)cx->sb_m);
+	PerlIO_printf(Perl_debug_log, "SB_STREND = 0x%lx\n",
+		(long)cx->sb_strend);
+	PerlIO_printf(Perl_debug_log, "SB_RXRES = 0x%lx\n",
+		(long)cx->sb_rxres);
+	break;
+    }
+}
+#endif