Make sure we end up with an executable binary when juggling stripped binaries...

tools/valgrind/valgrind_test.py

 #!/usr/bin/python
 # Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # purify_test.py
 
 '''Runs an exe through Valgrind and puts the intermediate files in a
 directory.
 '''
@@ skipping 290 matching lines @@
         needs_dsymutil = False
       else:
         # fake_dsym is set.  dsym_file is a copy of the original test_command
         # before it was stripped.  Copy it back to test_command so that
         # dsymutil has unstripped input to work with.  Move the stripped
         # test_command out of the way, it will be restored when this is
         # done.
         saved_test_command = test_command + '.stripped'
         os.rename(test_command, saved_test_command)
         shutil.copyfile(dsym_file, test_command)
+        shutil.copymode(saved_test_command, test_command)
 
     if needs_dsymutil:
       if self._options.generate_dsym:
         # Remove the .dSYM bundle if it exists.
         shutil.rmtree(dsym_bundle, True)
 
         dsymutil_command = ['dsymutil', test_command]
 
         # dsymutil is crazy slow.  Let it run for up to a half hour.  I hope
         # that's enough.
@@ skipping 11 matching lines @@
     valgrind = ValgrindMac()
     retcode = valgrind.Main()
     sys.exit(retcode)
   elif sys.platform == 'linux2': # Linux
     valgrind = ValgrindLinux()
     retcode = valgrind.Main()
     sys.exit(retcode)
   else:
     logging.error("Unknown platform: %s" % sys.platform)
     sys.exit(1)