Add a TRY_CATCH to get_prev_frame_always to better manage errors during unwind.

[deliverable/binutils-gdb.git] / gdb / frame.h

diff --git a/gdb/frame.h b/gdb/frame.h
index 79881521d7a9472d59e3cd4c1ef4228ae5421fc4..59564f9f6609e4e3aebff03e64e841d28fec7307 100644 (file)
--- a/gdb/frame.h
+++ b/gdb/frame.h
@@ -501,10 +501,23 @@ enum unwind_stop_reason
 
 enum unwind_stop_reason get_frame_unwind_stop_reason (struct frame_info *);
 
-/* Translate a reason code to an informative string.  */
+/* Translate a reason code to an informative string.  This converts the
+   generic stop reason codes into a generic string describing the code.
+   For a possibly frame specific string explaining the stop reason, use
+   FRAME_STOP_REASON_STRING instead.  */
 
 const char *unwind_stop_reason_to_string (enum unwind_stop_reason);
 
+/* Return a possibly frame specific string explaining why the unwind
+   stopped here.  E.g., if unwinding tripped on a memory error, this
+   will return the error description string, which includes the address
+   that we failed to access.  If there's no specific reason stored for
+   a frame then a generic reason string will be returned.
+
+   Should only be called for frames that don't have a previous frame.  */
+
+const char *frame_stop_reason_string (struct frame_info *);
+
 /* Unwind the stack frame so that the value of REGNUM, in the previous
    (up, older) frame is returned.  If VALUEP is NULL, don't
    fetch/compute the value.  Instead just return the location of the