* gdb/breakpoint.c (insert_bp_location): Remember the failing

	watchpoint address and pass to remove_breakpoint.
	(remove_breakpoints, remove_hw_watchpoints, reattach_breakpoints,
	detach_breakpoints): Adjust remove_breakpoint call.
	(remove_breakpoint): Add VAL_FAILED parameter.  Stop removing
	watchpoint addresses when it is reached.
	(delete_breakpoint): Adjust remove_breakpoint call.

2 files changed, 30 insertions, 17 deletions

diff --git a/ChangeLog.csl b/ChangeLog.csl
index d22ce1a..5ccd8ce 100644
--- a/ChangeLog.csl
+++ b/ChangeLog.csl
@@ -1,3 +1,13 @@
+2006-06-01  Nathan Sidwell  <nathan@codesourcery.com>
+
+	* gdb/breakpoint.c (insert_bp_location): Remember the failing
+	watchpoint address and pass to remove_breakpoint.
+	(remove_breakpoints, remove_hw_watchpoints, reattach_breakpoints,
+	detach_breakpoints): Adjust remove_breakpoint call.
+	(remove_breakpoint): Add VAL_FAILED parameter.  Stop removing
+	watchpoint addresses when it is reached.
+	(delete_breakpoint): Adjust remove_breakpoint call.
+
 2006-05-24  Nathan Sidwell  <nathan@codesourcery.com>
 
 	* gdb/remote-fileio.c (remote_fileio_reset): New.
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 472d8d0..91eb563 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -129,7 +129,8 @@ typedef enum
   }
 insertion_state_t;
 
-static int remove_breakpoint (struct bp_location *, insertion_state_t);
+static int remove_breakpoint (struct bp_location *, insertion_state_t,
+			      struct value *);
 
 static enum print_stop_action print_it_typical (bpstat);
 
@@ -948,6 +949,7 @@ insert_bp_location (struct bp_location *bpt,
 
       if (within_current_scope)
 	{
+	  struct value *val_failed = NULL;
 	  free_valchain (bpt);
 
 	  /* Evaluate the expression and cut the chain of values
@@ -995,13 +997,8 @@ insert_bp_location (struct bp_location *bpt,
 		      val = target_insert_watchpoint (addr, len, type);
 		      if (val == -1)
 			{
-			  /* Don't exit the loop, try to insert
-			     every value on the value chain.  That's
-			     because we will be removing all the
-			     watches below, and removing a
-			     watchpoint we didn't insert could have
-			     adverse effects.  */
-			  bpt->inserted = 0;
+			  val_failed = v;
+			  break;
 			}
 		      val = 0;
 		    }
@@ -1009,9 +1006,10 @@ insert_bp_location (struct bp_location *bpt,
 	    }
 	  /* Failure to insert a watchpoint on any memory value in the
 	     value chain brings us here.  */
-	  if (!bpt->inserted)
+	  if (val_failed)
 	    {
-	      remove_breakpoint (bpt, mark_uninserted);
+	      remove_breakpoint (bpt, mark_uninserted, val_failed);
+	      bpt->inserted = 0;
 	      *hw_breakpoint_error = 1;
 	      fprintf_unfiltered (tmp_error_stream,
 				  "Could not insert hardware watchpoint %d.\n", 
@@ -1199,7 +1197,7 @@ remove_breakpoints (void)
   {
     if (b->inserted)
       {
-	val = remove_breakpoint (b, mark_uninserted);
+	val = remove_breakpoint (b, mark_uninserted, NULL);
 	if (val != 0)
 	  return val;
       }
@@ -1217,7 +1215,7 @@ remove_hw_watchpoints (void)
   {
     if (b->inserted && b->loc_type == bp_loc_hardware_watchpoint)
       {
-	val = remove_breakpoint (b, mark_uninserted);
+	val = remove_breakpoint (b, mark_uninserted, NULL);
 	if (val != 0)
 	  return val;
       }
@@ -1238,7 +1236,7 @@ reattach_breakpoints (int pid)
   {
     if (b->inserted)
       {
-	remove_breakpoint (b, mark_inserted);
+	remove_breakpoint (b, mark_inserted, NULL);
 	if (b->loc_type == bp_loc_hardware_breakpoint)
 	  val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
 	else
@@ -1406,7 +1404,7 @@ detach_breakpoints (int pid)
   {
     if (b->inserted)
       {
-	val = remove_breakpoint (b, mark_inserted);
+	val = remove_breakpoint (b, mark_inserted, NULL);
 	if (val != 0)
 	  {
 	    do_cleanups (old_chain);
@@ -1418,8 +1416,13 @@ detach_breakpoints (int pid)
   return 0;
 }
 
+/* Remove the breakpoints for B.  FAILED_VAL, if non-null is the value
+   in the bpt->owner->val_chain that failed to be inserted.  We stop
+   at that point.  */
+
 static int
-remove_breakpoint (struct bp_location *b, insertion_state_t is)
+remove_breakpoint (struct bp_location *b, insertion_state_t is,
+		   struct value *val_failed)
 {
   int val;
 
@@ -1503,7 +1506,7 @@ remove_breakpoint (struct bp_location *b, insertion_state_t is)
 
       b->inserted = (is == mark_inserted);
       /* Walk down the saved value chain.  */
-      for (v = b->owner->val_chain; v; v = value_next (v))
+      for (v = b->owner->val_chain; v != val_failed; v = value_next (v))
 	{
 	  /* For each memory reference remove the watchpoint
 	     at that address.  */
@@ -6775,7 +6778,7 @@ delete_breakpoint (struct breakpoint *bpt)
   breakpoint_delete_event (bpt->number);
 
   if (bpt->loc->inserted)
-    remove_breakpoint (bpt->loc, mark_inserted);
+    remove_breakpoint (bpt->loc, mark_inserted, NULL);
 
   free_valchain (bpt->loc);