[m-rev.] diff: fix stack bottom bug

Zoltan Somogyi zs at cs.mu.OZ.AU
Fri May 30 16:30:45 AEST 2003


runtime/mercury_debug.[ch]:
	Fix a bug: do not try to access the dummy frame at the bottom of the
	nondet stack, since its prevfr field doesn't and cannot contain a valid
	value.

Zoltan.

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Index: runtime/mercury_debug.c
===================================================================
RCS file: /home/mercury1/repository/mercury/runtime/mercury_debug.c,v
retrieving revision 1.15
diff -u -r1.15 mercury_debug.c
--- runtime/mercury_debug.c	2 Apr 2003 23:22:16 -0000	1.15
+++ runtime/mercury_debug.c	29 May 2003 17:36:14 -0000
@@ -488,8 +488,9 @@
 	MR_Word	*fr;
 
 	printf("\nnondstack dump\n");
-	for (fr = MR_maxfr; fr > MR_CONTEXT(MR_ctxt_nondetstack_zone)->min;
-			fr = MR_prevfr_slot(fr)) {
+	for (fr = MR_maxfr; fr > MR_nondet_stack_trace_bottom;
+		fr = MR_prevfr_slot(fr))
+	{
 		MR_dumpframe(fr);
 	}
 }
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