[PATCH v9 18/29] frame: do not assume unwinding will succeed

[Markus Metzger <markus.t.metzger@intel.com>]

In get_frame_unwind_stop_reason, remove the assumption that further frame
unwinding will succeed.

gdb/
2013-02-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* frame.c (get_frame_unwind_stop_reason): Unconditionally call
	get_prev_frame_1.


---
 gdb/frame.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/gdb/frame.c b/gdb/frame.c
index 8facdc00..8dd4714 100644
--- a/gdb/frame.c
+++ b/gdb/frame.c
@@ -2533,13 +2533,10 @@ get_frame_sp (struct frame_info *this_frame)
 enum unwind_stop_reason
 get_frame_unwind_stop_reason (struct frame_info *frame)
 {
-  /* If we haven't tried to unwind past this point yet, then assume
-     that unwinding would succeed.  */
-  if (frame->prev_p == 0)
-    return UNWIND_NO_REASON;
+  /* Fill-in STOP_REASON.  */
+  get_prev_frame_1 (frame);
+  gdb_assert (frame->prev_p);
 
-  /* Otherwise, we set a reason when we succeeded (or failed) to
-     unwind.  */
   return frame->stop_reason;
 }
 
-- 
1.8.3.1