* dwarf2loc.c (dwarf_expr_frame_base): Add check for the return value of get_frame_block.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index c7a8346..cc89930 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2012-12-06  Hui Zhu  <hui_zhu@mentor.com>
+
+       * dwarf2loc.c (dwarf_expr_frame_base): Add check for the return
+       value of get_frame_block.
+
 2012-12-05  Pierre Muller  <muller@sourceware.org>
 
        Avoid memory leaks on struct cmd_list_element.doc field.

diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index cadcc17..0f8e9af 100644 (file)
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -332,11 +332,15 @@ dwarf_expr_frame_base (void *baton, const gdb_byte **start, size_t * length)
      this_base method.  */
   struct symbol *framefunc;
   struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
+  struct block *bl = get_frame_block (debaton->frame, NULL);
+
+  if (bl == NULL)
+    error (_("frame address is not available."));
 
   /* Use block_linkage_function, which returns a real (not inlined)
      function, instead of get_frame_function, which may return an
      inlined function.  */
-  framefunc = block_linkage_function (get_frame_block (debaton->frame, NULL));
+  framefunc = block_linkage_function (bl);
 
   /* If we found a frame-relative symbol then it was certainly within
      some function associated with a frame. If we can't find the frame,