Enhance gdb.lookup_objfile so that it works with a symlinked binary.

gdb/Changelog:

	* objfiles.c (objfile_filename): New function.
	* objfiles.h (objfile_filename): Declare it.
	(objfile_name): Add function comment.
	* python/py-objfile.c (objfpy_lookup_objfile_by_name): Try both the
	bfd file name (which may be realpath'd), and the original name.

gdb/testsuite/ChangeLog:

	* gdb.python/py-objfile.exp: Test gdb.lookup_objfile on symlinked
	binary.

1 files changed, 12 insertions, 1 deletions

diff --git a/gdb/objfiles.c b/gdb/objfiles.c
index c397f6872c1..ff20bc8fcff 100644
--- a/gdb/objfiles.c
+++ b/gdb/objfiles.c
@@ -1492,7 +1492,7 @@ default_iterate_over_objfiles_in_search_order
     }
 }
 
-/* Return canonical name for OBJFILE.  */
+/* See objfiles.h.  */
 
 const char *
 objfile_name (const struct objfile *objfile)
@@ -1506,6 +1506,17 @@ objfile_name (const struct objfile *objfile)
 /* See objfiles.h.  */
 
 const char *
+objfile_filename (const struct objfile *objfile)
+{
+  if (objfile->obfd != NULL)
+    return bfd_get_filename (objfile->obfd);
+
+  return NULL;
+}
+
+/* See objfiles.h.  */
+
+const char *
 objfile_debug_name (const struct objfile *objfile)
 {
   return lbasename (objfile->original_name);