| #!/usr/bin/env python2 |
| # 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 io |
| import os |
| import signal |
| import stat |
| import subprocess |
| import sys |
| import time |
| |
| # 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 get_sandbox_env(env): |
| """Returns the environment flags needed for the SUID sandbox to work.""" |
| extra_env = {} |
| chrome_sandbox_path = env.get(CHROME_SANDBOX_ENV, CHROME_SANDBOX_PATH) |
| # The above would silently disable the SUID sandbox if the env value were |
| # an empty string. We don't want to allow that. http://crbug.com/245376 |
| # TODO(jln): Remove this check once it's no longer possible to disable the |
| # sandbox that way. |
| if not chrome_sandbox_path: |
| chrome_sandbox_path = CHROME_SANDBOX_PATH |
| extra_env[CHROME_SANDBOX_ENV] = chrome_sandbox_path |
| |
| 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.""" |
| sanitizers = ['asan', 'lsan', 'msan', 'tsan'] |
| internal_flags = frozenset('--%s=%d' % (name, value) |
| for name in sanitizers |
| for value in [0, 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_sanitizer_env(cmd, asan, lsan, msan, tsan, cfi_diag): |
| """Returns the envirnoment flags needed for sanitizer tools.""" |
| |
| extra_env = {} |
| |
| # Instruct GTK to use malloc while running sanitizer-instrumented 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.join(ROOT_DIR, |
| 'third_party', 'llvm-build', 'Release+Asserts', 'bin', 'llvm-symbolizer') |
| |
| if lsan or tsan: |
| # 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] |
| elif (asan or msan or cfi_diag) and sys.platform not in ['win32', 'cygwin']: |
| # ASan uses a script for offline symbolization, except on Windows. |
| # 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 |
| else: |
| symbolization_options = [] |
| |
| # Leverage sanitizer to print stack trace on abort (e.g. assertion failure). |
| symbolization_options.append('handle_abort=1') |
| |
| if asan: |
| asan_options = symbolization_options[:] |
| if lsan: |
| asan_options.append('detect_leaks=1') |
| |
| if asan_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 that the OS tries to resolve to the cache directory and not the |
| # mapped directory. |
| extra_env['DYLD_LIBRARY_PATH'] = str(isolate_output_dir) |
| |
| if lsan: |
| if asan or msan: |
| lsan_options = [] |
| else: |
| lsan_options = symbolization_options[:] |
| 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:' |
| |
| extra_env['LSAN_OPTIONS'] = ' '.join(lsan_options) |
| |
| if msan: |
| msan_options = symbolization_options[:] |
| if lsan: |
| msan_options.append('detect_leaks=1') |
| extra_env['MSAN_OPTIONS'] = ' '.join(msan_options) |
| |
| if tsan: |
| tsan_options = symbolization_options[:] |
| extra_env['TSAN_OPTIONS'] = ' '.join(tsan_options) |
| |
| # CFI uses the UBSan runtime to provide diagnostics. |
| if cfi_diag: |
| ubsan_options = symbolization_options[:] + ['print_stacktrace=1'] |
| extra_env['UBSAN_OPTIONS'] = ' '.join(ubsan_options) |
| |
| return extra_env |
| |
| |
| def get_sanitizer_symbolize_command(json_path=None, executable_path=None): |
| """Construct the command to invoke offline symbolization script.""" |
| script_path = os.path.join( |
| ROOT_DIR, 'tools', 'valgrind', 'asan', 'asan_symbolize.py') |
| cmd = [sys.executable, script_path] |
| if json_path is not None: |
| cmd.append('--test-summary-json-file=%s' % json_path) |
| if executable_path is not None: |
| cmd.append('--executable-path=%s' % executable_path) |
| return cmd |
| |
| |
| def get_json_path(cmd): |
| """Extract the JSON test summary path from a command line.""" |
| json_path_flag = '--test-launcher-summary-output=' |
| for arg in cmd: |
| if arg.startswith(json_path_flag): |
| return arg.split(json_path_flag).pop() |
| return None |
| |
| |
| def symbolize_snippets_in_json(cmd, env): |
| """Symbolize output snippets inside the JSON test summary.""" |
| json_path = get_json_path(cmd) |
| if json_path is None: |
| return |
| |
| try: |
| symbolize_command = get_sanitizer_symbolize_command( |
| json_path=json_path, executable_path=cmd[0]) |
| p = subprocess.Popen(symbolize_command, stderr=subprocess.PIPE, env=env) |
| (_, stderr) = p.communicate() |
| except OSError as e: |
| print >> sys.stderr, 'Exception while symbolizing snippets: %s' % e |
| raise |
| |
| if p.returncode != 0: |
| print >> sys.stderr, "Error: failed to symbolize snippets in JSON:\n" |
| print >> sys.stderr, stderr |
| raise subprocess.CalledProcessError(p.returncode, symbolize_command) |
| |
| |
| def run_command_with_output(argv, stdoutfile, env=None, cwd=None): |
| """Run command and stream its stdout/stderr to the console & |stdoutfile|. |
| |
| Also forward_signals to obey |
| https://chromium.googlesource.com/infra/luci/luci-py/+/master/appengine/swarming/doc/Bot.md#graceful-termination_aka-the-sigterm-and-sigkill-dance |
| |
| Returns: |
| integer returncode of the subprocess. |
| """ |
| print('Running %r in %r (env: %r)' % (argv, cwd, env)) |
| assert stdoutfile |
| with io.open(stdoutfile, 'wb') as writer, \ |
| io.open(stdoutfile, 'rb', 1) as reader: |
| process = _popen(argv, env=env, cwd=cwd, stdout=writer, |
| stderr=subprocess.STDOUT) |
| forward_signals([process]) |
| while process.poll() is None: |
| sys.stdout.write(reader.read()) |
| # This sleep is needed for signal propagation. See the |
| # wait_with_signals() docstring. |
| time.sleep(0.1) |
| # Read the remaining. |
| sys.stdout.write(reader.read()) |
| print('Command %r returned exit code %d' % (argv, process.returncode)) |
| return process.returncode |
| |
| |
| def run_command(argv, env=None, cwd=None, log=True): |
| """Run command and stream its stdout/stderr both to stdout. |
| |
| Also forward_signals to obey |
| https://chromium.googlesource.com/infra/luci/luci-py/+/master/appengine/swarming/doc/Bot.md#graceful-termination_aka-the-sigterm-and-sigkill-dance |
| |
| Returns: |
| integer returncode of the subprocess. |
| """ |
| if log: |
| print('Running %r in %r (env: %r)' % (argv, cwd, env)) |
| process = _popen(argv, env=env, cwd=cwd, stderr=subprocess.STDOUT) |
| forward_signals([process]) |
| return wait_with_signals(process) |
| |
| |
| def run_command_output_to_handle(argv, file_handle, env=None, cwd=None): |
| """Run command and stream its stdout/stderr both to |file_handle|. |
| |
| Also forward_signals to obey |
| https://chromium.googlesource.com/infra/luci/luci-py/+/master/appengine/swarming/doc/Bot.md#graceful-termination_aka-the-sigterm-and-sigkill-dance |
| |
| Returns: |
| integer returncode of the subprocess. |
| """ |
| print('Running %r in %r (env: %r)' % (argv, cwd, env)) |
| process = _popen( |
| argv, env=env, cwd=cwd, stderr=file_handle, stdout=file_handle) |
| forward_signals([process]) |
| exit_code = wait_with_signals(process) |
| print('Command returned exit code %d' % exit_code) |
| return exit_code |
| |
| |
| def wait_with_signals(process): |
| """A version of process.wait() that works cross-platform. |
| |
| This version properly surfaces the SIGBREAK signal. |
| |
| From reading the subprocess.py source code, it seems we need to explicitly |
| call time.sleep(). The reason is that subprocess.Popen.wait() on Windows |
| directly calls WaitForSingleObject(), but only time.sleep() properly surface |
| the SIGBREAK signal. |
| |
| Refs: |
| https://github.com/python/cpython/blob/v2.7.15/Lib/subprocess.py#L692 |
| https://github.com/python/cpython/blob/v2.7.15/Modules/timemodule.c#L1084 |
| |
| Returns: |
| returncode of the process. |
| """ |
| while process.poll() is None: |
| time.sleep(0.1) |
| return process.returncode |
| |
| |
| def forward_signals(procs): |
| """Forwards unix's SIGTERM or win's CTRL_BREAK_EVENT to the given processes. |
| |
| This plays nicely with swarming's timeout handling. See also |
| https://chromium.googlesource.com/infra/luci/luci-py/+/master/appengine/swarming/doc/Bot.md#graceful-termination_aka-the-sigterm-and-sigkill-dance |
| |
| Args: |
| procs: A list of subprocess.Popen objects representing child processes. |
| """ |
| assert all(isinstance(p, subprocess.Popen) for p in procs) |
| def _sig_handler(sig, _): |
| for p in procs: |
| if p.poll() is not None: |
| continue |
| # SIGBREAK is defined only for win32. |
| if sys.platform == 'win32' and sig == signal.SIGBREAK: |
| p.send_signal(signal.CTRL_BREAK_EVENT) |
| else: |
| p.send_signal(sig) |
| if sys.platform == 'win32': |
| signal.signal(signal.SIGBREAK, _sig_handler) |
| else: |
| signal.signal(signal.SIGTERM, _sig_handler) |
| signal.signal(signal.SIGINT, _sig_handler) |
| |
| |
| def run_executable(cmd, env, stdoutfile=None): |
| """Runs an executable with: |
| - CHROME_HEADLESS set to indicate that the test is running on a |
| bot and shouldn't do anything interactive like show modal dialogs. |
| - environment variable CR_SOURCE_ROOT set to the root directory. |
| - environment variable LANGUAGE to en_US.UTF-8. |
| - environment variable CHROME_DEVEL_SANDBOX set |
| - Reuses sys.executable automatically. |
| """ |
| extra_env = { |
| # Set to indicate that the executable is running non-interactively on |
| # a bot. |
| 'CHROME_HEADLESS': '1', |
| |
| # Many tests assume a English interface... |
| '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(env)) |
| |
| # Copy logic from tools/build/scripts/slave/runtest.py. |
| asan = '--asan=1' in cmd |
| lsan = '--lsan=1' in cmd |
| msan = '--msan=1' in cmd |
| tsan = '--tsan=1' in cmd |
| cfi_diag = '--cfi-diag=1' in cmd |
| if stdoutfile or sys.platform in ['win32', 'cygwin']: |
| # Symbolization works in-process on Windows even when sandboxed. |
| use_symbolization_script = False |
| else: |
| # If any sanitizer is enabled, we print unsymbolized stack trace |
| # that is required to run through symbolization script. |
| use_symbolization_script = (asan or msan or cfi_diag or lsan or tsan) |
| |
| if asan or lsan or msan or tsan or cfi_diag: |
| extra_env.update(get_sanitizer_env(cmd, asan, lsan, msan, tsan, cfi_diag)) |
| |
| if lsan or tsan: |
| # LSan and TSan are not sandbox-friendly. |
| 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) |
| |
| # We also want to print the GTEST env vars that were set by the caller, |
| # because you need them to reproduce the task properly. |
| env_to_print = extra_env.copy() |
| for env_var_name in ('GTEST_SHARD_INDEX', 'GTEST_TOTAL_SHARDS'): |
| if env_var_name in env: |
| env_to_print[env_var_name] = env[env_var_name] |
| |
| print('Additional test environment:\n%s\n' |
| 'Command: %s\n' % ( |
| '\n'.join(' %s=%s' % |
| (k, v) for k, v in sorted(env_to_print.iteritems())), |
| ' '.join(cmd))) |
| sys.stdout.flush() |
| env.update(extra_env or {}) |
| try: |
| if stdoutfile: |
| # Write to stdoutfile and poll to produce terminal output. |
| return run_command_with_output(cmd, env=env, stdoutfile=stdoutfile) |
| elif use_symbolization_script: |
| # See above comment regarding offline symbolization. |
| # Need to pipe to the symbolizer script. |
| p1 = _popen(cmd, env=env, stdout=subprocess.PIPE, |
| stderr=sys.stdout) |
| p2 = _popen( |
| get_sanitizer_symbolize_command(executable_path=cmd[0]), |
| env=env, stdin=p1.stdout) |
| p1.stdout.close() # Allow p1 to receive a SIGPIPE if p2 exits. |
| forward_signals([p1, p2]) |
| wait_with_signals(p1) |
| wait_with_signals(p2) |
| # Also feed the out-of-band JSON output to the symbolizer script. |
| symbolize_snippets_in_json(cmd, env) |
| return p1.returncode |
| else: |
| return run_command(cmd, env=env, log=False) |
| except OSError: |
| print >> sys.stderr, 'Failed to start %s' % cmd |
| raise |
| |
| |
| def _popen(*args, **kwargs): |
| assert 'creationflags' not in kwargs |
| if sys.platform == 'win32': |
| # Necessary for signal handling. See crbug.com/733612#c6. |
| kwargs['creationflags'] = subprocess.CREATE_NEW_PROCESS_GROUP |
| return subprocess.Popen(*args, **kwargs) |
| |
| |
| def main(): |
| return run_executable(sys.argv[1:], os.environ.copy()) |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |