[RFA] Fix failed assertion hit in check_typedef

[Joel Brobecker <brobecker@adacore.com>]

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[switching to gdb-patches]

Hi Daniel,

> How about doing it in the caller?  If you go to check_typedef, you'll
> see that there's already an example of the same thing.  If this is
> DWARF2 and only started happening recently it may be the fault of your
> recent fixes for what empty types constitute a declaration.

Duh, of course! I'm sorry for not having seen this.

Funny enough, just after I worked on this and sent this message to
this list, Someone from the Paris office hit this very same problem,
and I found a checkin in our tree waiting for me when I woke up.
I think the patch follows your suggestion, so here is a slightly
modified version.

2007-02-28  Jerome Guitton  <guitton@adacore.com>
            Joel Brobecker  <brobecker@adacore.com>

        * gdbtypes.c (check_typedef): Do not replace stub type if
        the resolved type is not defined in the same objfile.

I tested it on x86-linux, no regression. Also fixes the problem
at hand.

OK to commit?

Thanks,
-- 
Joel

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Index: gdbtypes.c
===================================================================
RCS file: /cvs/src/src/gdb/gdbtypes.c,v
retrieving revision 1.112
diff -u -p -r1.112 gdbtypes.c
--- gdbtypes.c	29 Jan 2007 17:31:05 -0000	1.112
+++ gdbtypes.c	27 Feb 2007 23:24:06 -0000
@@ -1514,7 +1514,15 @@ check_typedef (struct type *type)
 	}
       sym = lookup_symbol (name, 0, STRUCT_DOMAIN, 0, (struct symtab **) NULL);
       if (sym)
-	make_cv_type (is_const, is_volatile, SYMBOL_TYPE (sym), &type);
+        {
+          /* Same as above for opaque types, we can replace the stub
+             with the complete type only if they are int the same
+             objfile.  */
+	  if (TYPE_OBJFILE (SYMBOL_TYPE(sym)) == TYPE_OBJFILE (type))
+            make_cv_type (is_const, is_volatile, SYMBOL_TYPE (sym), &type);
+	  else
+	    type = SYMBOL_TYPE (sym);
+        }
     }
 
   if (TYPE_TARGET_STUB (type))