From fcb887ffcd896af0b53c7ac8808bfeed54b321e8 Mon Sep 17 00:00:00 2001
From: Jim Kingdon <jkingdon@engr.sgi.com>
Date: Mon, 22 Apr 1991 07:08:07 +0000
Subject: [PATCH] 	* breakpoint.c (bpstat_print): Try all elements on the
 bpstat 	chain before giving up with an internal error.

Sun Apr 21 21:43:10 1991  Jim Kingdon  (kingdon at cygint.cygnus.com)

	* value.h, values.c (value_{,free_to_}mark): New functions.
	breakpoint.c (bpstat_stop_status): Use them.
---
 gdb/ChangeLog    |  8 ++++++++
 gdb/breakpoint.c | 17 +++++++++++++++--
 gdb/value.h      |  2 ++
 gdb/values.c     | 25 +++++++++++++++++++++++++
 4 files changed, 50 insertions(+), 2 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0c209bb0e2d..4054dc36d28 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
+Mon Apr 22 00:02:43 1991  Jim Kingdon  (kingdon at cygint.cygnus.com)
+
+	* breakpoint.c (bpstat_print): Try all elements on the bpstat
+	chain before giving up with an internal error.
+
 Sun Apr 21 21:43:10 1991  Jim Kingdon  (kingdon at cygint.cygnus.com)
 
+	* value.h, values.c (value_{,free_to_}mark): New functions.
+	breakpoint.c (bpstat_stop_status): Use them.
+
 	* tm-i386v{,-g}.h: Remove N_SET_MAGIC define.
 
 Sat Apr 20 21:42:47 1991  Jim Kingdon  (kingdon at cygint.cygnus.com)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 4617e5d0279..e5d3c69c8d6 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -643,6 +643,13 @@ bpstat_print (bs)
       return 1;
     }
 
+  /* Maybe another breakpoint in the chain caused us to stop.
+     (Currently all watchpoints go on the bpstat whether hit or
+     not.  That probably could (should) be changed, provided care is taken
+     with respect to bpstat_explains_signal).  */
+  if (bs->next)
+    return bpstat_print (bs->next);
+
   fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n");
   return 0;
 }
@@ -742,10 +749,16 @@ bpstat_stop_status (pc, frame_address)
 
 	  if (within_current_scope)
 	    {
+	      /* We use value_{,free_to_}mark because it could be a
+		 *long* time before we return to the command level and
+		 call free_all_values.  */
+
+	      value mark = value_mark ();
 	      value new_val = evaluate_expression (b->exp);
-	      release_value (new_val);
 	      if (!value_equal (b->val, new_val))
 		{
+		  release_value (new_val);
+		  value_free_to_mark (mark);
 		  bs->old_val = b->val;
 		  b->val = new_val;
 		  /* We will stop here */
@@ -753,7 +766,7 @@ bpstat_stop_status (pc, frame_address)
 	      else
 		{
 		  /* Nothing changed, don't do anything.  */
-		  value_free (new_val);
+		  value_free_to_mark (mark);
 		  continue;
 		  /* We won't stop here */
 		}
diff --git a/gdb/value.h b/gdb/value.h
index e4ac10120d5..4afe8585c7f 100644
--- a/gdb/value.h
+++ b/gdb/value.h
@@ -196,6 +196,8 @@ value read_var_value ();
 value locate_var_value ();
 value allocate_value ();
 value allocate_repeat_value ();
+value value_mark ();
+void value_free_to_mark ();
 value value_string ();
 
 value value_binop ();
diff --git a/gdb/values.c b/gdb/values.c
index 196ea23b371..2449da5df4e 100644
--- a/gdb/values.c
+++ b/gdb/values.c
@@ -111,6 +111,31 @@ allocate_repeat_value (type, count)
   return val;
 }
 
+/* Return a mark in the value chain.  All values allocated after the
+   mark is obtained (except for those released) are subject to being freed
+   if a subsequent value_free_to_mark is passed the mark.  */
+value
+value_mark ()
+{
+  return all_values;
+}
+
+/* Free all values allocated since MARK was obtained by value_mark
+   (except for those released).  */
+void
+value_free_to_mark (mark)
+     value mark;
+{
+  value val, next;
+
+  for (val = all_values; val && val != mark; val = next)
+    {
+      next = VALUE_NEXT (val);
+      value_free (val);
+    }
+  all_values = val;
+}
+
 /* Free all the values that have been allocated (except for those released).
    Called after each command, successful or not.  */
 
-- 
2.30.2