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#!/usr/bin/env python
# Copyright (c) 2012 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.
"""Sets environment variables needed to run a chromium unit test."""
import os
import stat
import subprocess
import sys
# This is hardcoded to be src/ relative to this script.
ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
CHROME_SANDBOX_ENV = 'CHROME_DEVEL_SANDBOX'
CHROME_SANDBOX_PATH = '/opt/chromium/chrome_sandbox'
def should_enable_sandbox(cmd, sandbox_path):
"""Return a boolean indicating that the current slave is capable of using the
sandbox and should enable it. This should return True iff the slave is a
Linux host with the sandbox file present and configured correctly."""
if not (sys.platform.startswith('linux') and
os.path.exists(sandbox_path)):
return False
# Copy the check in tools/build/scripts/slave/runtest.py.
if '--lsan=1' in cmd:
return False
sandbox_stat = os.stat(sandbox_path)
if ((sandbox_stat.st_mode & stat.S_ISUID) and
(sandbox_stat.st_mode & stat.S_IRUSR) and
(sandbox_stat.st_mode & stat.S_IXUSR) and
(sandbox_stat.st_uid == 0)):
return True
return False
def get_sandbox_env(cmd, env, verbose=False):
"""Checks enables the sandbox if it is required, otherwise it disables it.
Returns the environment flags to set."""
extra_env = {}
chrome_sandbox_path = env.get(CHROME_SANDBOX_ENV, CHROME_SANDBOX_PATH)
if should_enable_sandbox(cmd, chrome_sandbox_path):
if verbose:
print 'Enabling sandbox. Setting environment variable:'
print ' %s="%s"' % (CHROME_SANDBOX_ENV, chrome_sandbox_path)
extra_env[CHROME_SANDBOX_ENV] = chrome_sandbox_path
else:
if verbose:
print 'Disabling sandbox. Setting environment variable:'
print ' CHROME_DEVEL_SANDBOX=""'
extra_env['CHROME_DEVEL_SANDBOX'] = ''
return extra_env
def trim_cmd(cmd):
"""Removes internal flags from cmd since they're just used to communicate from
the host machine to this script running on the swarm slaves."""
internal_flags = frozenset(['--asan=0', '--asan=1', '--lsan=0', '--lsan=1'])
return [i for i in cmd if i not in internal_flags]
def fix_python_path(cmd):
"""Returns the fixed command line to call the right python executable."""
out = cmd[:]
if out[0] == 'python':
out[0] = sys.executable
elif out[0].endswith('.py'):
out.insert(0, sys.executable)
return out
def get_asan_env(cmd, lsan):
"""Returns the envirnoment flags needed for ASan and LSan."""
extra_env = {}
# Instruct GTK to use malloc while running ASan or LSan tests.
extra_env['G_SLICE'] = 'always-malloc'
extra_env['NSS_DISABLE_ARENA_FREE_LIST'] = '1'
extra_env['NSS_DISABLE_UNLOAD'] = '1'
# TODO(glider): remove the symbolizer path once
# https://code.google.com/p/address-sanitizer/issues/detail?id=134 is fixed.
symbolizer_path = os.path.abspath(os.path.join(ROOT_DIR, 'third_party',
'llvm-build', 'Release+Asserts', 'bin', 'llvm-symbolizer'))
asan_options = []
if lsan:
asan_options.append('detect_leaks=1')
if sys.platform == 'linux2':
# Use the debug version of libstdc++ under LSan. If we don't, there will
# be a lot of incomplete stack traces in the reports.
extra_env['LD_LIBRARY_PATH'] = '/usr/lib/x86_64-linux-gnu/debug:'
# LSan is not sandbox-compatible, so we can use online symbolization. In
# fact, it needs symbolization to be able to apply suppressions.
symbolization_options = ['symbolize=1',
'external_symbolizer_path=%s' % symbolizer_path]
suppressions_file = os.path.join(ROOT_DIR, 'tools', 'lsan',
'suppressions.txt')
lsan_options = ['suppressions=%s' % suppressions_file,
'print_suppressions=1']
extra_env['LSAN_OPTIONS'] = ' '.join(lsan_options)
else:
# ASan uses a script for offline symbolization.
# Important note: when running ASan with leak detection enabled, we must use
# the LSan symbolization options above.
symbolization_options = ['symbolize=0']
# Set the path to llvm-symbolizer to be used by asan_symbolize.py
extra_env['LLVM_SYMBOLIZER_PATH'] = symbolizer_path
asan_options.extend(symbolization_options)
extra_env['ASAN_OPTIONS'] = ' '.join(asan_options)
if sys.platform == 'darwin':
isolate_output_dir = os.path.abspath(os.path.dirname(cmd[0]))
# This is needed because the test binary has @executable_path embedded in it
# it that the OS tries to resolve to the cache directory and not the mapped
# directory.
extra_env['DYLD_LIBRARY_PATH'] = str(isolate_output_dir)
return extra_env
def run_executable(cmd, env):
"""Runs an executable with:
- environment variable CR_SOURCE_ROOT set to the root directory.
- environment variable LANGUAGE to en_US.UTF-8.
- environment variable CHROME_DEVEL_SANDBOX set if need
- Reuses sys.executable automatically.
"""
extra_env = {}
# Many tests assume a English interface...
extra_env['LANG'] = 'en_US.UTF-8'
# Used by base/base_paths_linux.cc as an override. Just make sure the default
# logic is used.
env.pop('CR_SOURCE_ROOT', None)
extra_env.update(get_sandbox_env(cmd, env))
# Copy logic from tools/build/scripts/slave/runtest.py.
asan = '--asan=1' in cmd
lsan = '--lsan=1' in cmd
if asan:
extra_env.update(get_asan_env(cmd, lsan))
if lsan:
cmd.append('--no-sandbox')
cmd = trim_cmd(cmd)
# Ensure paths are correctly separated on windows.
cmd[0] = cmd[0].replace('/', os.path.sep)
cmd = fix_python_path(cmd)
print('Additional test environment:\n%s\n'
'Command: %s\n' % (
'\n'.join(' %s=%s' %
(k, v) for k, v in sorted(extra_env.iteritems())),
' '.join(cmd)))
env.update(extra_env or {})
try:
# See above comment regarding offline symbolization.
if asan and not lsan:
# Need to pipe to the symbolizer script.
p1 = subprocess.Popen(cmd, env=env, stdout=subprocess.PIPE,
stderr=sys.stdout)
p2 = subprocess.Popen(["../tools/valgrind/asan/asan_symbolize.py"],
env=env, stdin=p1.stdout)
p1.stdout.close() # Allow p1 to receive a SIGPIPE if p2 exits.
p1.wait()
p2.wait()
return p1.returncode
else:
return subprocess.call(cmd, env=env)
except OSError:
print >> sys.stderr, 'Failed to start %s' % cmd
raise
def main():
return run_executable(sys.argv[1:], os.environ.copy())
if __name__ == '__main__':
sys.exit(main())
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