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, 11 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.python/py-objfile.exp b/gdb/testsuite/gdb.python/py-objfile.exp
index 50339a6..cddbd3d 100644
--- a/gdb/testsuite/gdb.python/py-objfile.exp
+++ b/gdb/testsuite/gdb.python/py-objfile.exp
@@ -115,3 +115,14 @@ if { [get_python_valueof "sep_objfile.build_id" "None"] != "None" } {
     gdb_test "python print (gdb.lookup_objfile (sep_objfile.build_id, by_build_id=True))" \
 	"Objfile not found\\.\r\n${python_error_text}"
 }
+
+# An objfile that was a symlink to a differently named file is still
+# findable with its original name.
+set symlink_binary [standard_output_file "symlink-binary"]
+remote_exec host "rm -f ${symlink_binary}"
+remote_exec host "ln -sf ${testfile} ${symlink_binary}"
+if [remote_file host exists "${symlink_binary}"] {
+    clean_restart "${symlink_binary}"
+    gdb_test "python print (gdb.lookup_objfile (\"${symlink_binary}\").filename)" \
+	"${testfile}" "gdb.lookup_objfile of symlinked binary"
+}