Non-SFI Mode: Add nonsfi_loader and plumbing to test it

buildbot/buildbot_pnacl.py

 #!/usr/bin/python
 # Copyright (c) 2013 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import re
 
 from buildbot_lib import (
     BuildContext, BuildStatus, Command, ParseStandardCommandLine,
     RemoveSconsBuildDirectories, RemoveGypBuildDirectories, RunBuild, SCons,
@@ skipping 54 matching lines @@
   with Step('smoke_tests_sandboxed_fast', status):
     SCons(context, parallel=True, mode=irt_mode,
           args=flags_run + ['use_sandboxed_translator=1', 'translate_fast=1']
           + smoke_tests_irt)
 
   # Translator memory consumption regression test
   with Step('large_code_test', status):
     SCons(context, parallel=True, mode=irt_mode,
           args=flags_run + ['use_sandboxed_translator=1', 'large_code'])
 
+  # Test Non-SFI Mode.
+  with Step('nonsfi_tests', status):
+    # The only architectures that the PNaCl toolchain supports Non-SFI
+    # versions of are currently x86-32 and ARM, and ARM testing is covered
+    # by buildbot_pnacl.sh rather than this Python script.
+    if context['default_scons_platform'] == 'x86-32':
+      # TODO(mseaborn): Enable more tests here when they pass.
+      SCons(context, parallel=True, mode=irt_mode,
+            args=flags_run + ['nonsfi_nacl=1', 'run_hello_world_test_irt'])
+
 
 def Main():
   context = BuildContext()
   status = BuildStatus(context)
   ParseStandardCommandLine(context)
 
   if context.Linux():
     SetupLinuxEnvironment(context)
   else:
     raise Exception('Unsupported platform')
 
   RunBuild(BuildScriptX86, status)
 
 if __name__ == '__main__':
   Main()