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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.
"""A manual version of trace_inputs.py that is specialized in tracing each
google-test test case individually.
This is mainly written to work around bugs in strace w.r.t. browser_tests.
"""
import fnmatch
import json
import multiprocessing
import optparse
import os
import sys
import tempfile
import time
import list_test_cases
import trace_inputs
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
ROOT_DIR = os.path.dirname(os.path.dirname(BASE_DIR))
def trace_test_case(
test_case, executable, root_dir, cwd_dir, product_dir, leak):
"""Traces a single test case and returns the .isolate compatible variable
dict.
"""
# Resolve any symlink
root_dir = os.path.realpath(root_dir)
api = trace_inputs.get_api()
cmd = [executable, '--gtest_filter=%s' % test_case]
if not leak:
f, logname = tempfile.mkstemp(prefix='trace')
os.close(f)
else:
logname = '%s.%s.log' % (executable, test_case.replace('/', '-'))
f = None
try:
for i in range(3):
start = time.time()
returncode, output = trace_inputs.trace(
logname, cmd, os.path.join(root_dir, cwd_dir), api, True)
if returncode and i != 2:
print '\nFailed while running: %s' % ' '.join(cmd)
print 'Trying again!'
continue
duration = time.time() - start
try:
_, _, _, _, simplified = trace_inputs.load_trace(logname, root_dir, api)
break
except Exception:
print '\nFailed loading the trace for: %s' % ' '.join(cmd)
print 'Trying again!'
variables = trace_inputs.generate_dict(simplified, cwd_dir, product_dir)
return {
'case': test_case,
'variables': variables,
'result': returncode,
'duration': duration,
'output': output,
}
finally:
if f:
os.remove(logname)
def task(args):
"""Adaptor for multiprocessing.Pool().imap_unordered().
It is executed asynchronously.
"""
return trace_test_case(*args)
def get_test_cases(executable, skip):
"""Returns the filtered list of test cases.
This is done synchronously.
"""
try:
out = list_test_cases.gtest_list_tests(executable)
except list_test_cases.Failure, e:
print e.args[0]
return None
tests = list_test_cases.parse_gtest_cases(out)
tests = [t for t in tests if not any(fnmatch.fnmatch(t, s) for s in skip)]
print 'Found %d test cases in %s' % (len(tests), os.path.basename(executable))
return tests
def trace_test_cases(
executable, root_dir, cwd_dir, product_dir, leak, skip, jobs, timeout):
"""Traces test cases one by one."""
tests = get_test_cases(executable, skip)
if not tests:
return
last_line = ''
out = {}
index = 0
pool = multiprocessing.Pool(processes=jobs)
start = time.time()
try:
g = ((t, executable, root_dir, cwd_dir, product_dir, leak) for t in tests)
it = pool.imap_unordered(task, g)
while True:
try:
result = it.next(timeout=timeout)
except StopIteration:
break
case = result.pop('case')
index += 1
line = '%d of %d (%.1f%%), %.1fs: %s' % (
index,
len(tests),
index * 100. / len(tests),
time.time() - start,
case)
sys.stdout.write(
'\r%s%s' % (line, ' ' * max(0, len(last_line) - len(line))))
sys.stdout.flush()
last_line = line
# TODO(maruel): Retry failed tests.
out[case] = result
return 0
except multiprocessing.TimeoutError, e:
print 'Got a timeout while processing a task item %s' % e
# Be sure to stop the pool on exception.
pool.terminate()
return 1
except Exception, e:
# Be sure to stop the pool on exception.
pool.terminate()
raise
finally:
with open('%s.test_cases' % executable, 'w') as f:
json.dump(out, f, indent=2, sort_keys=True)
pool.close()
pool.join()
def main():
"""CLI frontend to validate arguments."""
parser = optparse.OptionParser(
usage='%prog <options> [gtest]')
parser.allow_interspersed_args = False
parser.add_option(
'-c', '--cwd',
default='chrome',
help='Signal to start the process from this relative directory. When '
'specified, outputs the inputs files in a way compatible for '
'gyp processing. Should be set to the relative path containing the '
'gyp file, e.g. \'chrome\' or \'net\'')
parser.add_option(
'-p', '--product-dir',
default='out/Release',
help='Directory for PRODUCT_DIR. Default: %default')
parser.add_option(
'--root-dir',
default=ROOT_DIR,
help='Root directory to base everything off. Default: %default')
parser.add_option(
'-l', '--leak',
action='store_true',
help='Leak trace files')
parser.add_option(
'-s', '--skip',
default=[],
action='append',
help='filter to apply to test cases to skip, wildcard-style')
parser.add_option(
'-j', '--jobs',
type='int',
help='number of parallel jobs')
parser.add_option(
'-t', '--timeout',
default=120,
type='int',
help='number of parallel jobs')
options, args = parser.parse_args()
if len(args) != 1:
parser.error(
'Please provide the executable line to run, if you need fancy things '
'like xvfb, start this script from inside xvfb, it\'ll be faster.')
executable = os.path.join(options.root_dir, options.product_dir, args[0])
return trace_test_cases(
executable,
options.root_dir,
options.cwd,
options.product_dir,
options.leak,
options.skip,
options.jobs,
options.timeout)
if __name__ == '__main__':
sys.exit(main())
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