PNaCl: Allow translator to produce an unsandboxed, native executable

SConstruct

 #! -*- python -*-
 # Copyright (c) 2012 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 atexit
 import os
 import platform
 import re
 import subprocess
@@ skipping 289 matching lines @@
 
   BitFromArgument(env, 'use_sandboxed_translator', default=False,
     desc='use pnacl sandboxed translator for linking (not available for arm)')
 
   BitFromArgument(env, 'pnacl_generate_pexe', default=env.Bit('bitcode'),
     desc='use pnacl to generate pexes and translate in a separate step')
 
   BitFromArgument(env, 'translate_in_build_step', default=True,
     desc='Run translation during build phase (e.g. if do_not_run_tests=1)')
 
+  BitFromArgument(env, 'pnacl_unsandboxed', default=False,
+    desc='Translate pexe to an unsandboxed, host executable')
+
   BitFromArgument(env, 'browser_headless', default=False,
     desc='Where possible, set up a dummy display to run the browser on '
       'when running browser tests.  On Linux, this runs the browser through '
       'xvfb-run.  This Scons does not need to be run with an X11 display '
       'and we do not open a browser window on the user\'s desktop.  '
       'Unfortunately there is no equivalent on Mac OS X.')
 
   BitFromArgument(env, 'disable_crash_dialog', default=True,
     desc='Disable Windows\' crash dialog box, which Windows pops up when a '
       'process exits with an unhandled fault.  Windows enables this by '
@@ skipping 1191 matching lines @@
       env['TRUSTED_ENV'].Bit('windows')):
     return []
 
   # The nexe might be a pexe that needs finalization, and translation.
   nexe = env.GetTranslatedNexe(nexe)
 
   command = [nexe]
   if args is not None:
     command += args
 
+  if env.Bit('pnacl_unsandboxed'):
+    # Run unsandboxed executable directly, without sel_ldr.
+    return env.CommandTest(name, command, size, **extra)
+
   if loader is None:
     loader = env.GetSelLdr()
     if loader is None:
       print 'WARNING: no sel_ldr found. Skipping test %s' % name
       return []
 
   # Avoid problems with [] as default arguments
   if sel_ldr_flags is None:
     sel_ldr_flags = []
   else:
@@ skipping 2165 matching lines @@
   nacl_env.ValidateSdk()
 
 if BROKEN_TEST_COUNT > 0:
   msg = "There are %d broken tests." % BROKEN_TEST_COUNT
   if GetOption('brief_comstr'):
     msg += " Add --verbose to the command line for more information."
   print msg
 
 # separate warnings from actual build output
 Banner('B U I L D - O U T P U T:')