Add support for running the tests through valgrind.

tools/test.py

 #!/usr/bin/env python
 #
 # Copyright 2008 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 1060 matching lines @@
       default=False, action="store_true")
   result.add_option("-s", "--suite", help="A test suite",
       default=[], action="append")
   result.add_option("-t", "--timeout", help="Timeout in seconds",
       default=60, type="int")
   result.add_option("--arch", help='The architecture to run tests for',
       default='none')
   result.add_option("--simulator", help="Run tests with architecture simulator",
       default='none')
   result.add_option("--special-command", default=None)
+  result.add_option("--valgrind", help="Run tests through valgrind",
+      default=False, action="store_true")
   result.add_option("--cat", help="Print the source of the tests",
       default=False, action="store_true")
   result.add_option("--warn-unused", help="Report unused rules",
       default=False, action="store_true")
   result.add_option("-j", help="The number of parallel tasks to run",
       default=1, type="int")
   result.add_option("--time", help="Print timing information after running",
       default=False, action="store_true")
   result.add_option("--suppress-dialogs", help="Suppress Windows dialogs for crashing tests",
         dest="suppress_dialogs", default=True, action="store_true")
@@ skipping 116 matching lines @@
 
   root = LiteralTestSuite(repositories)
   if len(args) == 0:
     paths = [SplitPath(t) for t in BUILT_IN_TESTS]
   else:
     paths = [ ]
     for arg in args:
       path = SplitPath(arg)
       paths.append(path)
 
+  # Check for --valgrind option. If enabled, we overwrite the special
+  # command flag with a command that uses the run-valgrind.py script.
+  if options.valgrind:
+    run_valgrind = join(workspace, "tools", "run-valgrind.py")
+    options.special_command = "python -u " + run_valgrind + " @"
+
   # First build the required targets
   buildspace = abspath('.')
   context = Context(workspace, buildspace, VERBOSE,
                     join(buildspace, 'shell'),
                     options.timeout,
-                    GetSpecialCommandProcessor(options.special_command), 
+                    GetSpecialCommandProcessor(options.special_command),
                     options.suppress_dialogs)
   if options.j != 1:
     options.scons_flags += ['-j', str(options.j)]
   if not options.no_build:
     reqs = [ ]
     for path in paths:
       reqs += root.GetBuildRequirements(path, context)
     reqs = list(set(reqs))
     if len(reqs) > 0:
       if not BuildRequirements(context, reqs, options.mode, options.scons_flags):
@@ skipping 74 matching lines @@
     for entry in timed_tests[:20]:
       t = FormatTime(entry.duration)
       sys.stderr.write("%4i (%s) %s\n" % (index, t, entry.GetLabel()))
       index += 1
 
   return result
 
 
 if __name__ == '__main__':
   sys.exit(Main())