src/systemc/tests/verify.py - public/gem5 - Git at Google

 #!/usr/bin/env python3
 #
 # Copyright 2018 Google, Inc.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met: redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer;
 # redistributions in binary form must reproduce the above copyright
 # notice, this list of conditions and the following disclaimer in the
 # documentation and/or other materials provided with the distribution;
 # neither the name of the copyright holders nor the names of its
 # contributors may be used to endorse or promote products derived from
 # this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 import argparse
 import collections
 import difflib
 import functools
 import inspect
 import itertools
 import json
 import multiprocessing.pool
 import os
 import re
 import subprocess
 import sys

 script_path = os.path.abspath(inspect.getfile(inspect.currentframe()))
 script_dir = os.path.dirname(script_path)
 config_path = os.path.join(script_dir, 'config.py')
 # Parent directories if checked out as part of gem5.
 systemc_dir = os.path.dirname(script_dir)
 src_dir = os.path.dirname(systemc_dir)
 checkout_dir = os.path.dirname(src_dir)

 systemc_rel_path = 'systemc'
 tests_rel_path = os.path.join(systemc_rel_path, 'tests')
 json_rel_path = os.path.join(tests_rel_path, 'tests.json')


 def scons(*args):
     args = ['scons', '--with-systemc-tests'] + list(args)
     subprocess.check_call(args)


 class Test():
     def __init__(self, target, suffix, build_dir, props):
         self.target = target
         self.suffix = suffix
         self.build_dir = build_dir
         self.props = {}

         for key, val in props.items():
             self.set_prop(key, val)

     def set_prop(self, key, val):
         setattr(self, key, val)
         self.props[key] = val

     def dir(self):
         return os.path.join(self.build_dir, tests_rel_path, self.path)

     def src_dir(self):
         return os.path.join(script_dir, self.path)

     def expected_returncode_file(self):
         return os.path.join(self.src_dir(), 'expected_returncode')

     def golden_dir(self):
         return os.path.join(self.src_dir(), 'golden')

     def bin(self):
         return '.'.join([self.name, self.suffix])

     def full_path(self):
         return os.path.join(self.dir(), self.bin())

     def m5out_dir(self):
         return os.path.join(self.dir(), 'm5out.' + self.suffix)

     def returncode_file(self):
         return os.path.join(self.m5out_dir(), 'returncode')


 test_phase_classes = {}

 class TestPhaseMeta(type):
     def __init__(cls, name, bases, d):
         if not d.pop('abstract', False):
             test_phase_classes[d['name']] = cls

         super().__init__(name, bases, d)

 class TestPhaseBase(metaclass=TestPhaseMeta):
     abstract = True

     def __init__(self, main_args, *args):
         self.main_args = main_args
         self.args = args

     def __lt__(self, other):
         return self.number < other.number

 class CompilePhase(TestPhaseBase):
     name = 'compile'
     number = 1

     def run(self, tests):
         targets = list([test.full_path() for test in tests])

         parser = argparse.ArgumentParser()
         parser.add_argument('-j', type=int, default=0)
         args, leftovers = parser.parse_known_args(self.args)
         if args.j == 0:
             self.args = ('-j', str(self.main_args.j)) + self.args

         scons_args = [ '--directory', self.main_args.scons_dir,
                        'USE_SYSTEMC=1' ] + list(self.args) + targets
         scons(*scons_args)

 class RunPhase(TestPhaseBase):
     name = 'execute'
     number = 2

     def run(self, tests):
         parser = argparse.ArgumentParser()
         parser.add_argument('--timeout', type=int, metavar='SECONDS',
                             help='Time limit for each run in seconds, '
                             '0 to disable.',
                             default=60)
         parser.add_argument('-j', type=int, default=0,
                 help='How many tests to run in parallel.')
         args = parser.parse_args(self.args)

         timeout_cmd = [
             'timeout',
             '--kill-after', str(args.timeout * 2),
             str(args.timeout)
         ]
         def run_test(test):
             cmd = []
             if args.timeout:
                 cmd.extend(timeout_cmd)
             cmd.extend([
                 os.path.abspath(test.full_path()),
                 '-rd', os.path.abspath(test.m5out_dir()),
                 '--listener-mode=off',
                 '--quiet',
                 os.path.abspath(config_path),
             ])
             # Ensure the output directory exists.
             if not os.path.exists(test.m5out_dir()):
                 os.makedirs(test.m5out_dir())
             try:
                 subprocess.check_call(cmd, cwd=os.path.dirname(test.dir()))
             except subprocess.CalledProcessError as error:
                 returncode = error.returncode
             else:
                 returncode = 0
             with open(test.returncode_file(), 'w') as rc:
                 rc.write('%d\n' % returncode)

         j = self.main_args.j if args.j == 0 else args.j

         runnable = filter(lambda t: not t.compile_only, tests)
         if j == 1:
             list(map(run_test, runnable))
         else:
             tp = multiprocessing.pool.ThreadPool(j)
             list(map(lambda t: tp.apply_async(run_test, (t,)), runnable))
             tp.close()
             tp.join()

 class Checker():
     def __init__(self, ref, test, tag):
         self.ref = ref
         self.test = test
         self.tag = tag

     def check(self):
         with open(self.test) as test_f, open(self.ref) as ref_f:
             return test_f.read() == ref_f.read()

 def tagged_filt(tag, num):
     return (r'\n{}: \({}{}\) .*\n(In file: .*\n)?'
             r'(In process: [\w.]* @ .*\n)?').format(tag, tag[0], num)

 def error_filt(num):
     return tagged_filt('Error', num)

 def warning_filt(num):
     return tagged_filt('Warning', num)

 def info_filt(num):
     return tagged_filt('Info', num)

 class DiffingChecker(Checker):
     def __init__(self, ref, test, tag, out_dir):
         super().__init__(ref, test, tag)
         self.out_dir = out_dir

     def is_bytes_mode(self):
         return False

     def do_diff(self, ref_lines, test_lines, ref_file, test_file):
         return difflib.unified_diff(ref_lines, test_lines,
                                     fromfile=ref_file, tofile=test_file)

     def diffing_check(self, ref_lines, test_lines):
         test_file = os.path.basename(self.test)
         ref_file = os.path.basename(self.ref)

         diff_file = '.'.join([ref_file, 'diff'])
         diff_path = os.path.join(self.out_dir, diff_file)
         if test_lines != ref_lines:
             flag = 'wb' if self.is_bytes_mode() else 'w'
             with open(diff_file, flag) as diff_f:
                 for line in self.do_diff(ref_lines, test_lines,
                                          ref_file, test_file):
                     diff_f.write(line)
             return False
         else:
             if os.path.exists(diff_path):
                 os.unlink(diff_path)
             return True

 class LogChecker(DiffingChecker):
     def merge_filts(*filts):
         filts = map(lambda f: '(' + f + ')', filts)
         filts = '|'.join(filts)
         return re.compile(filts.encode('utf-8'), flags=re.MULTILINE)

     def is_bytes_mode(self):
         return True

     def do_diff(self, ref_lines, test_lines, ref_file, test_file):
         return difflib.diff_bytes(
             difflib.unified_diff,
             ref_lines, test_lines,
             fromfile=ref_file.encode('utf-8'),
             tofile=test_file.encode('utf-8'))

     # The reporting mechanism will print the actual filename when running in
     # gem5, and the "golden" output will say "<removed by verify.py>". We want
     # to strip out both versions to make comparing the output sensible.
     in_file_filt = r'^In file: ((<removed by verify\.pl>)|([a-zA-Z0-9.:_/]*))$'

     ref_filt = merge_filts(
         r'^\nInfo: /OSCI/SystemC: Simulation stopped by user.\n',
         r'^SystemC Simulation\n',
         r'^\nInfo: \(I804\) /IEEE_Std_1666/deprecated: ' +
         r'You can turn off(.*\n){7}',
         r'^\nInfo: \(I804\) /IEEE_Std_1666/deprecated: \n' +
         r'    sc_clock\(const char(.*\n){3}',
         warning_filt(540),
         warning_filt(571),
         info_filt(804),
         info_filt(704),
         in_file_filt,
     )
     test_filt = merge_filts(
         r'^/.*:\d+: ',
         r'^Global frequency set at \d* ticks per second\n',
         r'info: Entering event queue @ \d*\.  Starting simulation\.\.\.\n',
         r'warn: Ignoring request to set stack size\.\n',
         r'^warn: No dot file generated. Please install pydot ' +
         r'to generate the dot file and pdf.\n',
         info_filt(804),
         in_file_filt,
     )

     def apply_filters(self, data, filts):
         re.sub(filt, b'', data)

     def check(self):
         with open(self.test, 'rb') as test_f, open(self.ref, 'rb') as ref_f:
             test = re.sub(self.test_filt, b'', test_f.read())
             ref = re.sub(self.ref_filt, b'', ref_f.read())
             return self.diffing_check(ref.splitlines(True),
                                       test.splitlines(True))

 class VcdChecker(DiffingChecker):
     def check(self):
         with open (self.test) as test_f, open(self.ref) as ref_f:
             ref = ref_f.read().splitlines(True)
             test = test_f.read().splitlines(True)
             # Strip off the first seven lines of the test output which are
             # date and version information.
             test = test[7:]

             return self.diffing_check(ref, test)

 class GoldenDir():
     def __init__(self, path, platform):
         self.path = path
         self.platform = platform

         contents = os.listdir(path)
         suffix = '.' + platform
         suffixed = filter(lambda c: c.endswith(suffix), contents)
         bases = map(lambda t: t[:-len(platform)], suffixed)
         common = filter(lambda t: not t.startswith(tuple(bases)), contents)

         self.entries = {}
         class Entry():
             def __init__(self, e_path):
                 self.used = False
                 self.path = os.path.join(path, e_path)

             def use(self):
                 self.used = True

         for entry in contents:
             self.entries[entry] = Entry(entry)

     def entry(self, name):
         def match(n):
             return (n == name) or n.startswith(name + '.')
         matches = { n: e for n, e in self.entries.items() if match(n) }

         for match in matches.values():
             match.use()

         platform_name = '.'.join([ name, self.platform ])
         if platform_name in matches:
             return matches[platform_name].path
         if name in matches:
             return matches[name].path
         else:
             return None

     def unused(self):
         items = self.entries.items()
         items = list(filter(lambda i: not i[1].used, items))

         items.sort()
         sources = []
         i = 0
         while i < len(items):
             root = items[i][0]
             sources.append(root)
             i += 1
             while i < len(items) and items[i][0].startswith(root):
                 i += 1
         return sources

 class VerifyPhase(TestPhaseBase):
     name = 'verify'
     number = 3

     def reset_status(self):
         self._passed = []
         self._failed = {}

     def passed(self, test):
         self._passed.append(test)

     def failed(self, test, cause, note=''):
         test.set_prop('note', note)
         self._failed.setdefault(cause, []).append(test)

     def print_status(self):
         total_passed = len(self._passed)
         total_failed = sum(map(len, self._failed.values()))
         print()
         print('Passed: {passed:4} - Failed: {failed:4}'.format(
                   passed=total_passed, failed=total_failed))

     def write_result_file(self, path):
         results = {
             'passed': list(map(lambda t: t.props, self._passed)),
             'failed': {
                 cause: list(map(lambda t: t.props, tests))
                 for cause, tests in self._failed.items()
             }
         }
         with open(path, 'w') as rf:
             json.dump(results, rf)

     def print_results(self):
         print()
         print('Passed:')
         for path in sorted(list([ t.path for t in self._passed ])):
             print('    ', path)

         print()
         print('Failed:')

         causes = []
         for cause, tests in sorted(self._failed.items()):
             block = '  ' + cause.capitalize() + ':\n'
             for test in sorted(tests, key=lambda t: t.path):
                 block += '    ' + test.path
                 if test.note:
                     block += ' - ' + test.note
                 block += '\n'
             causes.append(block)

         print('\n'.join(causes))

     def run(self, tests):
         parser = argparse.ArgumentParser()
         result_opts = parser.add_mutually_exclusive_group()
         result_opts.add_argument('--result-file', action='store_true',
                 help='Create a results.json file in the current directory.')
         result_opts.add_argument('--result-file-at', metavar='PATH',
                 help='Create a results json file at the given path.')
         parser.add_argument('--no-print-results', action='store_true',
                 help='Don\'t print a list of tests that passed or failed')
         args = parser.parse_args(self.args)

         self.reset_status()

         runnable = filter(lambda t: not t.compile_only, tests)
         compile_only = filter(lambda t: t.compile_only, tests)

         for test in compile_only:
             if os.path.exists(test.full_path()):
                 self.passed(test)
             else:
                 self.failed(test, 'compile failed')

         for test in runnable:
             with open(test.returncode_file()) as rc:
                 returncode = int(rc.read())

             expected_returncode = 0
             if os.path.exists(test.expected_returncode_file()):
                 with open(test.expected_returncode_file()) as erc:
                     expected_returncode = int(erc.read())

             if returncode == 124:
                 self.failed(test, 'time out')
                 continue
             elif returncode != expected_returncode:
                 if expected_returncode == 0:
                     self.failed(test, 'abort')
                 else:
                     self.failed(test, 'missed abort')
                 continue

             out_dir = test.m5out_dir()

             Diff = collections.namedtuple(
                     'Diff', 'ref, test, tag, ref_filter')

             diffs = []

             gd = GoldenDir(test.golden_dir(), 'linux64')

             missing = []
             log_file = '.'.join([test.name, 'log'])
             log_path = gd.entry(log_file)
             simout_path = os.path.join(out_dir, 'simout')
             if not os.path.exists(simout_path):
                 missing.append('log output')
             elif log_path:
                 diffs.append(LogChecker(log_path, simout_path,
                                         log_file, out_dir))

             for name in gd.unused():
                 test_path = os.path.join(out_dir, name)
                 ref_path = gd.entry(name)
                 if not os.path.exists(test_path):
                     missing.append(name)
                 elif name.endswith('.vcd'):
                     diffs.append(VcdChecker(ref_path, test_path,
                                             name, out_dir))
                 else:
                     diffs.append(Checker(ref_path, test_path, name))

             if missing:
                 self.failed(test, 'missing output', ' '.join(missing))
                 continue

             failed_diffs = list(filter(lambda d: not d.check(), diffs))
             if failed_diffs:
                 tags = map(lambda d: d.tag, failed_diffs)
                 self.failed(test, 'failed diffs', ' '.join(tags))
                 continue

             self.passed(test)

         if not args.no_print_results:
             self.print_results()

         self.print_status()

         result_path = None
         if args.result_file:
             result_path = os.path.join(os.getcwd(), 'results.json')
         elif args.result_file_at:
             result_path = args.result_file_at

         if result_path:
             self.write_result_file(result_path)


 parser = argparse.ArgumentParser(description='SystemC test utility')

 parser.add_argument('build_dir', metavar='BUILD_DIR',
                     help='The build directory (ie. build/ARM).')

 parser.add_argument('--update-json', action='store_true',
                     help='Update the json manifest of tests.')

 parser.add_argument('--flavor', choices=['debug', 'opt', 'fast'],
                     default='opt',
                     help='Flavor of binary to test.')

 parser.add_argument('--list', action='store_true',
                     help='List the available tests')

 parser.add_argument('-j', type=int, default=1,
                     help='Default level of parallelism, can be overriden '
                     'for individual stages')

 parser.add_argument('-C', '--scons-dir', metavar='SCONS_DIR',
                     default=checkout_dir,
                     help='Directory to run scons from')

 filter_opts = parser.add_mutually_exclusive_group()
 filter_opts.add_argument('--filter', default='True',
                          help='Python expression which filters tests based '
                          'on their properties')
 filter_opts.add_argument('--filter-file', default=None,
                          type=argparse.FileType('r'),
                          help='Same as --filter, but read from a file')

 def collect_phases(args):
     phase_groups = [list(g) for k, g in
                     itertools.groupby(args, lambda x: x != '--phase') if k]
     main_args = parser.parse_args(phase_groups[0][1:])
     phases = []
     names = []
     for group in phase_groups[1:]:
         name = group[0]
         if name in names:
             raise RuntimeException('Phase %s specified more than once' % name)
         phase = test_phase_classes[name]
         phases.append(phase(main_args, *group[1:]))
     phases.sort()
     return main_args, phases

 main_args, phases = collect_phases(sys.argv)

 if len(phases) == 0:
     phases = [
         CompilePhase(main_args),
         RunPhase(main_args),
         VerifyPhase(main_args)
     ]


 json_path = os.path.join(main_args.build_dir, json_rel_path)

 if main_args.update_json:
     scons('--directory', main_args.scons_dir, os.path.join(json_path))

 with open(json_path) as f:
     test_data = json.load(f)

     if main_args.filter_file:
         f = main_args.filter_file
         filt = compile(f.read(), f.name, 'eval')
     else:
         filt = compile(main_args.filter, '<string>', 'eval')

     filtered_tests = {
         target: props for (target, props) in
                     test_data.items() if eval(filt, dict(props))
     }

     if len(filtered_tests) == 0:
         print('All tests were filtered out.')
         exit()

     if main_args.list:
         for target, props in sorted(filtered_tests.items()):
             print('%s.%s' % (target, main_args.flavor))
             for key, val in props.items():
                 print('    %s: %s' % (key, val))
         print('Total tests: %d' % len(filtered_tests))
     else:
         tests_to_run = list([
             Test(target, main_args.flavor, main_args.build_dir, props) for
                 target, props in sorted(filtered_tests.items())
         ])

         for phase in phases:
             phase.run(tests_to_run)
	#!/usr/bin/env python3
	#
	# Copyright 2018 Google, Inc.
	#
	# Redistribution and use in source and binary forms, with or without
	# modification, are permitted provided that the following conditions are
	# met: redistributions of source code must retain the above copyright
	# notice, this list of conditions and the following disclaimer;
	# redistributions in binary form must reproduce the above copyright
	# notice, this list of conditions and the following disclaimer in the
	# documentation and/or other materials provided with the distribution;
	# neither the name of the copyright holders nor the names of its
	# contributors may be used to endorse or promote products derived from
	# this software without specific prior written permission.
	#
	# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

	import argparse
	import collections
	import difflib
	import functools
	import inspect
	import itertools
	import json
	import multiprocessing.pool
	import os
	import re
	import subprocess
	import sys

	script_path = os.path.abspath(inspect.getfile(inspect.currentframe()))
	script_dir = os.path.dirname(script_path)
	config_path = os.path.join(script_dir, 'config.py')
	# Parent directories if checked out as part of gem5.
	systemc_dir = os.path.dirname(script_dir)
	src_dir = os.path.dirname(systemc_dir)
	checkout_dir = os.path.dirname(src_dir)

	systemc_rel_path = 'systemc'
	tests_rel_path = os.path.join(systemc_rel_path, 'tests')
	json_rel_path = os.path.join(tests_rel_path, 'tests.json')



	def scons(*args):
	args = ['scons', '--with-systemc-tests'] + list(args)
	subprocess.check_call(args)



	class Test():
	def __init__(self, target, suffix, build_dir, props):
	self.target = target
	self.suffix = suffix
	self.build_dir = build_dir
	self.props = {}

	for key, val in props.items():
	self.set_prop(key, val)

	def set_prop(self, key, val):
	setattr(self, key, val)
	self.props[key] = val

	def dir(self):
	return os.path.join(self.build_dir, tests_rel_path, self.path)

	def src_dir(self):
	return os.path.join(script_dir, self.path)

	def expected_returncode_file(self):
	return os.path.join(self.src_dir(), 'expected_returncode')

	def golden_dir(self):
	return os.path.join(self.src_dir(), 'golden')

	def bin(self):
	return '.'.join([self.name, self.suffix])

	def full_path(self):
	return os.path.join(self.dir(), self.bin())

	def m5out_dir(self):
	return os.path.join(self.dir(), 'm5out.' + self.suffix)

	def returncode_file(self):
	return os.path.join(self.m5out_dir(), 'returncode')



	test_phase_classes = {}

	class TestPhaseMeta(type):
	def __init__(cls, name, bases, d):
	if not d.pop('abstract', False):
	test_phase_classes[d['name']] = cls

	super().__init__(name, bases, d)

	class TestPhaseBase(metaclass=TestPhaseMeta):
	abstract = True

	def __init__(self, main_args, *args):
	self.main_args = main_args
	self.args = args

	def __lt__(self, other):
	return self.number < other.number

	class CompilePhase(TestPhaseBase):
	name = 'compile'
	number = 1

	def run(self, tests):
	targets = list([test.full_path() for test in tests])

	parser = argparse.ArgumentParser()
	parser.add_argument('-j', type=int, default=0)
	args, leftovers = parser.parse_known_args(self.args)
	if args.j == 0:
	self.args = ('-j', str(self.main_args.j)) + self.args

	scons_args = [ '--directory', self.main_args.scons_dir,
	'USE_SYSTEMC=1' ] + list(self.args) + targets
	scons(*scons_args)

	class RunPhase(TestPhaseBase):
	name = 'execute'
	number = 2

	def run(self, tests):
	parser = argparse.ArgumentParser()
	parser.add_argument('--timeout', type=int, metavar='SECONDS',
	help='Time limit for each run in seconds, '
	'0 to disable.',
	default=60)
	parser.add_argument('-j', type=int, default=0,
	help='How many tests to run in parallel.')
	args = parser.parse_args(self.args)

	timeout_cmd = [
	'timeout',
	'--kill-after', str(args.timeout * 2),
	str(args.timeout)
	]
	def run_test(test):
	cmd = []
	if args.timeout:
	cmd.extend(timeout_cmd)
	cmd.extend([
	os.path.abspath(test.full_path()),
	'-rd', os.path.abspath(test.m5out_dir()),
	'--listener-mode=off',
	'--quiet',
	os.path.abspath(config_path),
	])
	# Ensure the output directory exists.
	if not os.path.exists(test.m5out_dir()):
	os.makedirs(test.m5out_dir())
	try:
	subprocess.check_call(cmd, cwd=os.path.dirname(test.dir()))
	except subprocess.CalledProcessError as error:
	returncode = error.returncode
	else:
	returncode = 0
	with open(test.returncode_file(), 'w') as rc:
	rc.write('%d\n' % returncode)

	j = self.main_args.j if args.j == 0 else args.j

	runnable = filter(lambda t: not t.compile_only, tests)
	if j == 1:
	list(map(run_test, runnable))
	else:
	tp = multiprocessing.pool.ThreadPool(j)
	list(map(lambda t: tp.apply_async(run_test, (t,)), runnable))
	tp.close()
	tp.join()

	class Checker():
	def __init__(self, ref, test, tag):
	self.ref = ref
	self.test = test
	self.tag = tag

	def check(self):
	with open(self.test) as test_f, open(self.ref) as ref_f:
	return test_f.read() == ref_f.read()

	def tagged_filt(tag, num):
	return (r'\n{}: \({}{}\) .\n(In file: .\n)?'
	r'(In process: [\w.]* @ .*\n)?').format(tag, tag[0], num)

	def error_filt(num):
	return tagged_filt('Error', num)

	def warning_filt(num):
	return tagged_filt('Warning', num)

	def info_filt(num):
	return tagged_filt('Info', num)

	class DiffingChecker(Checker):
	def __init__(self, ref, test, tag, out_dir):
	super().__init__(ref, test, tag)
	self.out_dir = out_dir

	def is_bytes_mode(self):
	return False

	def do_diff(self, ref_lines, test_lines, ref_file, test_file):
	return difflib.unified_diff(ref_lines, test_lines,
	fromfile=ref_file, tofile=test_file)

	def diffing_check(self, ref_lines, test_lines):
	test_file = os.path.basename(self.test)
	ref_file = os.path.basename(self.ref)

	diff_file = '.'.join([ref_file, 'diff'])
	diff_path = os.path.join(self.out_dir, diff_file)
	if test_lines != ref_lines:
	flag = 'wb' if self.is_bytes_mode() else 'w'
	with open(diff_file, flag) as diff_f:
	for line in self.do_diff(ref_lines, test_lines,
	ref_file, test_file):
	diff_f.write(line)
	return False
	else:
	if os.path.exists(diff_path):
	os.unlink(diff_path)
	return True

	class LogChecker(DiffingChecker):
	def merge_filts(*filts):
	filts = map(lambda f: '(' + f + ')', filts)
	filts = '\|'.join(filts)
	return re.compile(filts.encode('utf-8'), flags=re.MULTILINE)

	def is_bytes_mode(self):
	return True

	def do_diff(self, ref_lines, test_lines, ref_file, test_file):
	return difflib.diff_bytes(
	difflib.unified_diff,
	ref_lines, test_lines,
	fromfile=ref_file.encode('utf-8'),
	tofile=test_file.encode('utf-8'))

	# The reporting mechanism will print the actual filename when running in
	# gem5, and the "golden" output will say "<removed by verify.py>". We want
	# to strip out both versions to make comparing the output sensible.
	in_file_filt = r'^In file: ((<removed by verify\.pl>)\|([a-zA-Z0-9.:_/]*))$'

	ref_filt = merge_filts(
	r'^\nInfo: /OSCI/SystemC: Simulation stopped by user.\n',
	r'^SystemC Simulation\n',
	r'^\nInfo: \(I804\) /IEEE_Std_1666/deprecated: ' +
	r'You can turn off(.*\n){7}',
	r'^\nInfo: \(I804\) /IEEE_Std_1666/deprecated: \n' +
	r' sc_clock\(const char(.*\n){3}',
	warning_filt(540),
	warning_filt(571),
	info_filt(804),
	info_filt(704),
	in_file_filt,
	)
	test_filt = merge_filts(
	r'^/.*:\d+: ',
	r'^Global frequency set at \d* ticks per second\n',
	r'info: Entering event queue @ \d*\. Starting simulation\.\.\.\n',
	r'warn: Ignoring request to set stack size\.\n',
	r'^warn: No dot file generated. Please install pydot ' +
	r'to generate the dot file and pdf.\n',
	info_filt(804),
	in_file_filt,
	)

	def apply_filters(self, data, filts):
	re.sub(filt, b'', data)

	def check(self):
	with open(self.test, 'rb') as test_f, open(self.ref, 'rb') as ref_f:
	test = re.sub(self.test_filt, b'', test_f.read())
	ref = re.sub(self.ref_filt, b'', ref_f.read())
	return self.diffing_check(ref.splitlines(True),
	test.splitlines(True))

	class VcdChecker(DiffingChecker):
	def check(self):
	with open (self.test) as test_f, open(self.ref) as ref_f:
	ref = ref_f.read().splitlines(True)
	test = test_f.read().splitlines(True)
	# Strip off the first seven lines of the test output which are
	# date and version information.
	test = test[7:]

	return self.diffing_check(ref, test)

	class GoldenDir():
	def __init__(self, path, platform):
	self.path = path
	self.platform = platform

	contents = os.listdir(path)
	suffix = '.' + platform
	suffixed = filter(lambda c: c.endswith(suffix), contents)
	bases = map(lambda t: t[:-len(platform)], suffixed)
	common = filter(lambda t: not t.startswith(tuple(bases)), contents)

	self.entries = {}
	class Entry():
	def __init__(self, e_path):
	self.used = False
	self.path = os.path.join(path, e_path)

	def use(self):
	self.used = True

	for entry in contents:
	self.entries[entry] = Entry(entry)

	def entry(self, name):
	def match(n):
	return (n == name) or n.startswith(name + '.')
	matches = { n: e for n, e in self.entries.items() if match(n) }

	for match in matches.values():
	match.use()

	platform_name = '.'.join([ name, self.platform ])
	if platform_name in matches:
	return matches[platform_name].path
	if name in matches:
	return matches[name].path
	else:
	return None

	def unused(self):
	items = self.entries.items()
	items = list(filter(lambda i: not i[1].used, items))

	items.sort()
	sources = []
	i = 0
	while i < len(items):
	root = items[i][0]
	sources.append(root)
	i += 1
	while i < len(items) and items[i][0].startswith(root):
	i += 1
	return sources

	class VerifyPhase(TestPhaseBase):
	name = 'verify'
	number = 3

	def reset_status(self):
	self._passed = []
	self._failed = {}

	def passed(self, test):
	self._passed.append(test)

	def failed(self, test, cause, note=''):
	test.set_prop('note', note)
	self._failed.setdefault(cause, []).append(test)

	def print_status(self):
	total_passed = len(self._passed)
	total_failed = sum(map(len, self._failed.values()))
	print()
	print('Passed: {passed:4} - Failed: {failed:4}'.format(
	passed=total_passed, failed=total_failed))

	def write_result_file(self, path):
	results = {
	'passed': list(map(lambda t: t.props, self._passed)),
	'failed': {
	cause: list(map(lambda t: t.props, tests))
	for cause, tests in self._failed.items()
	}
	}
	with open(path, 'w') as rf:
	json.dump(results, rf)

	def print_results(self):
	print()
	print('Passed:')
	for path in sorted(list([ t.path for t in self._passed ])):
	print(' ', path)

	print()
	print('Failed:')

	causes = []
	for cause, tests in sorted(self._failed.items()):
	block = ' ' + cause.capitalize() + ':\n'
	for test in sorted(tests, key=lambda t: t.path):
	block += ' ' + test.path
	if test.note:
	block += ' - ' + test.note
	block += '\n'
	causes.append(block)

	print('\n'.join(causes))

	def run(self, tests):
	parser = argparse.ArgumentParser()
	result_opts = parser.add_mutually_exclusive_group()
	result_opts.add_argument('--result-file', action='store_true',
	help='Create a results.json file in the current directory.')
	result_opts.add_argument('--result-file-at', metavar='PATH',
	help='Create a results json file at the given path.')
	parser.add_argument('--no-print-results', action='store_true',
	help='Don\'t print a list of tests that passed or failed')
	args = parser.parse_args(self.args)

	self.reset_status()

	runnable = filter(lambda t: not t.compile_only, tests)
	compile_only = filter(lambda t: t.compile_only, tests)

	for test in compile_only:
	if os.path.exists(test.full_path()):
	self.passed(test)
	else:
	self.failed(test, 'compile failed')

	for test in runnable:
	with open(test.returncode_file()) as rc:
	returncode = int(rc.read())

	expected_returncode = 0
	if os.path.exists(test.expected_returncode_file()):
	with open(test.expected_returncode_file()) as erc:
	expected_returncode = int(erc.read())

	if returncode == 124:
	self.failed(test, 'time out')
	continue
	elif returncode != expected_returncode:
	if expected_returncode == 0:
	self.failed(test, 'abort')
	else:
	self.failed(test, 'missed abort')
	continue

	out_dir = test.m5out_dir()

	Diff = collections.namedtuple(
	'Diff', 'ref, test, tag, ref_filter')

	diffs = []

	gd = GoldenDir(test.golden_dir(), 'linux64')

	missing = []
	log_file = '.'.join([test.name, 'log'])
	log_path = gd.entry(log_file)
	simout_path = os.path.join(out_dir, 'simout')
	if not os.path.exists(simout_path):
	missing.append('log output')
	elif log_path:
	diffs.append(LogChecker(log_path, simout_path,
	log_file, out_dir))

	for name in gd.unused():
	test_path = os.path.join(out_dir, name)
	ref_path = gd.entry(name)
	if not os.path.exists(test_path):
	missing.append(name)
	elif name.endswith('.vcd'):
	diffs.append(VcdChecker(ref_path, test_path,
	name, out_dir))
	else:
	diffs.append(Checker(ref_path, test_path, name))

	if missing:
	self.failed(test, 'missing output', ' '.join(missing))
	continue

	failed_diffs = list(filter(lambda d: not d.check(), diffs))
	if failed_diffs:
	tags = map(lambda d: d.tag, failed_diffs)
	self.failed(test, 'failed diffs', ' '.join(tags))
	continue

	self.passed(test)

	if not args.no_print_results:
	self.print_results()

	self.print_status()

	result_path = None
	if args.result_file:
	result_path = os.path.join(os.getcwd(), 'results.json')
	elif args.result_file_at:
	result_path = args.result_file_at

	if result_path:
	self.write_result_file(result_path)


	parser = argparse.ArgumentParser(description='SystemC test utility')

	parser.add_argument('build_dir', metavar='BUILD_DIR',
	help='The build directory (ie. build/ARM).')

	parser.add_argument('--update-json', action='store_true',
	help='Update the json manifest of tests.')

	parser.add_argument('--flavor', choices=['debug', 'opt', 'fast'],
	default='opt',
	help='Flavor of binary to test.')

	parser.add_argument('--list', action='store_true',
	help='List the available tests')

	parser.add_argument('-j', type=int, default=1,
	help='Default level of parallelism, can be overriden '
	'for individual stages')

	parser.add_argument('-C', '--scons-dir', metavar='SCONS_DIR',
	default=checkout_dir,
	help='Directory to run scons from')

	filter_opts = parser.add_mutually_exclusive_group()
	filter_opts.add_argument('--filter', default='True',
	help='Python expression which filters tests based '
	'on their properties')
	filter_opts.add_argument('--filter-file', default=None,
	type=argparse.FileType('r'),
	help='Same as --filter, but read from a file')

	def collect_phases(args):
	phase_groups = [list(g) for k, g in
	itertools.groupby(args, lambda x: x != '--phase') if k]
	main_args = parser.parse_args(phase_groups[0][1:])
	phases = []
	names = []
	for group in phase_groups[1:]:
	name = group[0]
	if name in names:
	raise RuntimeException('Phase %s specified more than once' % name)
	phase = test_phase_classes[name]
	phases.append(phase(main_args, *group[1:]))
	phases.sort()
	return main_args, phases

	main_args, phases = collect_phases(sys.argv)

	if len(phases) == 0:
	phases = [
	CompilePhase(main_args),
	RunPhase(main_args),
	VerifyPhase(main_args)
	]



	json_path = os.path.join(main_args.build_dir, json_rel_path)

	if main_args.update_json:
	scons('--directory', main_args.scons_dir, os.path.join(json_path))

	with open(json_path) as f:
	test_data = json.load(f)

	if main_args.filter_file:
	f = main_args.filter_file
	filt = compile(f.read(), f.name, 'eval')
	else:
	filt = compile(main_args.filter, '<string>', 'eval')

	filtered_tests = {
	target: props for (target, props) in
	test_data.items() if eval(filt, dict(props))
	}

	if len(filtered_tests) == 0:
	print('All tests were filtered out.')
	exit()

	if main_args.list:
	for target, props in sorted(filtered_tests.items()):
	print('%s.%s' % (target, main_args.flavor))
	for key, val in props.items():
	print(' %s: %s' % (key, val))
	print('Total tests: %d' % len(filtered_tests))
	else:
	tests_to_run = list([
	Test(target, main_args.flavor, main_args.build_dir, props) for
	target, props in sorted(filtered_tests.items())
	])

	for phase in phases:
	phase.run(tests_to_run)