tools/test.py

#!/usr/bin/env python2.7

# Copyright 2015, VIXL authors
# All rights reserved.
#
# 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 ARM Limited 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 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
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import argparse
import fcntl
import git
import itertools
import multiprocessing
import os
from os.path import join
import platform
import subprocess
import sys
import time

import config
import clang_format
import lint
import printer
import test
import threaded_tests
import util


dir_root = config.dir_root


# Remove duplicates from a list
def RemoveDuplicates(values):
  # Convert the list into a set and back to list
  # as sets guarantee items are unique.
  return list(set(values))


# Custom argparse.Action to automatically add and handle an 'all' option.
# If no 'default' value is set, it will default to 'all.
# If accepted options are set using 'choices' then only these values will be
# allowed.
# If they're set using 'soft_choices' then 'all' will default to these values,
# but other values will also be accepted.
class AllChoiceAction(argparse.Action):

  # At least one option was set by the user.
  WasSetByUser = False

  def __init__(self, **kwargs):
    if 'choices' in kwargs:
      assert 'soft_choices' not in kwargs,\
          "Can't have both 'choices' and 'soft_choices' options"
      self.all_choices = list(kwargs['choices'])
      kwargs['choices'].append('all')
    else:
      self.all_choices = kwargs['soft_choices']
      kwargs['help'] += ' Supported values: {' + ','.join(
          ['all'] + self.all_choices) + '}'
      del kwargs['soft_choices']
    if 'default' not in kwargs:
      kwargs['default'] = self.all_choices
    super(AllChoiceAction, self).__init__(**kwargs)

  def __call__(self, parser, namespace, values, option_string=None):
    AllChoiceAction.WasSetByUser = True
    if 'all' in values:
      # Substitute 'all' by the actual values.
      values = self.all_choices + [value for value in values if value != 'all']

    setattr(namespace, self.dest, RemoveDuplicates(values))


def BuildOptions():
  args = argparse.ArgumentParser(
    description =
    '''This tool runs all tests matching the specified filters for multiple
    environment, build options, and runtime options configurations.''',
    # Print default values.
    formatter_class=argparse.ArgumentDefaultsHelpFormatter)

  args.add_argument('filters', metavar='filter', nargs='*',
                    help='Run tests matching all of the (regexp) filters.')

  # We automatically build the script options from the options to be tested.
  test_arguments = args.add_argument_group(
    'Test options',
    'These options indicate what should be tested')
  test_arguments.add_argument(
      '--negative_testing',
      help='Tests with negative testing enabled.',
      action='store_const',
      const='on',
      default='off')
  test_arguments.add_argument(
      '--compiler',
      help='Test for the specified compilers.',
      soft_choices=config.tested_compilers,
      action=AllChoiceAction,
      nargs="+")
  test_arguments.add_argument(
      '--mode',
      help='Test with the specified build modes.',
      choices=config.build_options_modes,
      action=AllChoiceAction,
      nargs="+")
  test_arguments.add_argument(
      '--std',
      help='Test with the specified C++ standard.',
      soft_choices=config.tested_cpp_standards,
      action=AllChoiceAction,
      nargs="+")
  test_arguments.add_argument(
      '--target',
      help='Test with the specified isa enabled.',
      soft_choices=config.build_options_target,
      action=AllChoiceAction,
      nargs="+")

  general_arguments = args.add_argument_group('General options')
  general_arguments.add_argument('--dry-run', action='store_true',
                                 help='''Don't actually build or run anything,
                                 but print the configurations that would be
                                 tested.''')
  general_arguments.add_argument('--verbose', action='store_true',
                                 help='''Print extra information.''')
  general_arguments.add_argument(
    '--jobs', '-j', metavar='N', type=int, nargs='?',
    default=multiprocessing.cpu_count(),
    const=multiprocessing.cpu_count(),
    help='''Runs the tests using N jobs. If the option is set but no value is
    provided, the script will use as many jobs as it thinks useful.''')
  general_arguments.add_argument('--clang-format',
                                 default=clang_format.DEFAULT_CLANG_FORMAT,
                                 help='Path to clang-format.')
  general_arguments.add_argument('--nobench', action='store_true',
                                 help='Do not run benchmarks.')
  general_arguments.add_argument('--nolint', action='store_true',
                                 help='Do not run the linter.')
  general_arguments.add_argument('--noclang-format', action='store_true',
                                 help='Do not run clang-format.')
  general_arguments.add_argument('--notest', action='store_true',
                                 help='Do not run tests.')
  general_arguments.add_argument('--fail-early', action='store_true',
                                 help='Exit as soon as a test fails.')
  general_arguments.add_argument(
    '--under_valgrind', action='store_true',
    help='''Run the test-runner commands under Valgrind.
            Note that a few tests are known to fail because of
            issues in Valgrind''')
  return args.parse_args()


def RunCommand(command, environment_options = None):
  # Create a copy of the environment. We do not want to pollute the environment
  # of future commands run.
  environment = os.environ.copy()

  printable_command = ''
  if environment_options:
    # Add the environment options to the environment:
    environment.update(environment_options)
    printable_command += ' ' + DictToString(environment_options) + ' '
  printable_command += ' '.join(command)

  printable_command_orange = \
    printer.COLOUR_ORANGE + printable_command + printer.NO_COLOUR
  printer.PrintOverwritableLine(printable_command_orange)
  sys.stdout.flush()

  # Start a process for the command.
  # Interleave `stderr` and `stdout`.
  p = subprocess.Popen(command,
                       stdout=subprocess.PIPE,
                       stderr=subprocess.STDOUT,
                       env=environment)

  # We want to be able to display a continuously updated 'work indicator' while
  # the process is running. Since the process can hang if the `stdout` pipe is
  # full, we need to pull from it regularly. We cannot do so via the
  # `readline()` function because it is blocking, and would thus cause the
  # indicator to not be updated properly. So use file control mechanisms
  # instead.
  indicator = ' (still working: %d seconds elapsed)'

  # Mark the process output as non-blocking.
  flags = fcntl.fcntl(p.stdout, fcntl.F_GETFL)
  fcntl.fcntl(p.stdout, fcntl.F_SETFL, flags | os.O_NONBLOCK)

  t_start = time.time()
  t_current = t_start
  t_last_indication = t_start
  t_current = t_start
  process_output = ''

  # Keep looping as long as the process is running.
  while p.poll() is None:
    # Avoid polling too often.
    time.sleep(0.1)
    # Update the progress indicator.
    t_current = time.time()
    if (t_current - t_start >= 2) and (t_current - t_last_indication >= 1):
      printer.PrintOverwritableLine(
        printable_command_orange + indicator % int(t_current - t_start))
      sys.stdout.flush()
      t_last_indication = t_current
    # Pull from the process output.
    while True:
      try:
        line = os.read(p.stdout.fileno(), 1024)
      except OSError:
        line = ''
        break
      if line == '': break
      process_output += line

  # The process has exited. Don't forget to retrieve the rest of its output.
  out, err = p.communicate()
  rc = p.poll()
  process_output += out

  printable_command += ' (took %d seconds)' % int(t_current - t_start)
  if rc == 0:
    printer.Print(printer.COLOUR_GREEN + printable_command + printer.NO_COLOUR)
  else:
    printer.Print(printer.COLOUR_RED + printable_command + printer.NO_COLOUR)
    printer.Print(process_output)
  return rc


def RunLinter(jobs):
  rc, default_tracked_files = lint.GetDefaultFilesToLint()
  if rc:
    return rc
  return lint.RunLinter(map(lambda x: join(dir_root, x), default_tracked_files),
                        jobs = args.jobs, progress_prefix = 'cpp lint: ')


def RunClangFormat(clang_path, jobs):
  return clang_format.ClangFormatFiles(clang_format.GetCppSourceFilesToFormat(),
                                       clang_path, jobs = jobs,
                                       progress_prefix = 'clang-format: ')


def BuildAll(build_options, jobs, environment_options):
  scons_command = ['scons', '-C', dir_root, 'all', '-j', str(jobs)]
  if util.IsCommandAvailable('ccache'):
    scons_command += ['compiler_wrapper=ccache']
    # Fixes warnings for ccache 3.3.1 and lower:
    environment_options = environment_options.copy()
    environment_options["CCACHE_CPP2"] = 'yes'
  scons_command += DictToString(build_options).split()
  return RunCommand(scons_command, environment_options)


def CanRunAarch64(options, args):
  for target in options['target']:
    if target in ['aarch64', 'a64']:
      return True

  return False


def CanRunAarch32(options, args):
  for target in options['target']:
    if target in ['aarch32', 'a32', 't32']:
      return True
  return False


def RunBenchmarks(options, args):
  rc = 0
  if CanRunAarch32(options, args):
    benchmark_names = util.ListCCFilesWithoutExt(config.dir_aarch32_benchmarks)
    for bench in benchmark_names:
      rc |= RunCommand(
        [os.path.realpath(
          join(config.dir_build_latest, 'benchmarks/aarch32', bench)), '10'])
  if CanRunAarch64(options, args):
    benchmark_names = util.ListCCFilesWithoutExt(config.dir_aarch64_benchmarks)
    for bench in benchmark_names:
      rc |= RunCommand(
        [util.relrealpath(
            join(config.dir_build_latest,
                'benchmarks/aarch64', bench)), '10'])
  return rc



# It is a precommit run if the user did not specify any of the
# options that would affect the automatically generated combinations.
def IsPrecommitRun(args):
  return args.negative_testing == "off" and not AllChoiceAction.WasSetByUser

# Generate a list of all the possible combinations of the passed list:
# ListCombinations( a = [a0, a1], b = [b0, b1] ) will return
# [ {a : a0, b : b0}, {a : a0, b : b1}, {a: a1, b : b0}, {a : a1, b : b1}]
def ListCombinations(**kwargs):
  # End of recursion: no options passed
  if not kwargs:
    return [{}]
  option, values = kwargs.popitem()
  configs = ListCombinations(**kwargs)
  retval = []
  if not isinstance(values, list):
    values = [values]
  for value in values:
    for config in configs:
      new_config = config.copy()
      new_config[option] = value
      retval.append(new_config)
  return retval

# Convert a dictionary into a space separated string
# {a : a0, b : b0} --> "a=a0 b=b0"
def DictToString(options):
  return " ".join(
      ["{}={}".format(option, value) for option, value in options.items()])


if __name__ == '__main__':
  util.require_program('scons')

  args = BuildOptions()

  rc = util.ReturnCode(args.fail_early, printer.Print)

  if args.under_valgrind:
    util.require_program('valgrind')

  tests = threaded_tests.TestQueue(args.under_valgrind)
  if not args.nolint and not args.dry_run:
    rc.Combine(RunLinter(args.jobs))

  if not args.noclang_format and not args.dry_run:
    rc.Combine(RunClangFormat(args.clang_format, args.jobs))

  list_options = []
  if IsPrecommitRun(args):
    # Maximize the coverage for precommit testing.

    # Debug builds with negative testing and all targets enabled.
    list_options += ListCombinations(
        compiler = args.compiler,
        negative_testing = 'on',
        mode = 'debug',
        target = 'a64,a32,t32')

    # Release builds with all targets enabled.
    list_options += ListCombinations(
        compiler = args.compiler,
        negative_testing = 'off',
        std = args.std,
        mode = 'release',
        target = 'a64,a32,t32')

    # c++98 builds for Thumb32 target only.
    list_options += ListCombinations(
        compiler = args.compiler,
        negative_testing = 'off',
        std = 'c++98',
        mode = args.mode,
        target = 't32')

    # c++11 builds for Aarch64 target only.
    list_options += ListCombinations(
        compiler = args.compiler,
        negative_testing = 'off',
        std = 'c++11',
        mode = args.mode,
        target = 'a64')
  else:
    list_options = ListCombinations(
        compiler = args.compiler,
        negative_testing = args.negative_testing,
        std = args.std,
        mode = args.mode,
        target = args.target)

  for options in list_options:
    if (args.dry_run):
      print(DictToString(options))
      continue
    # Convert 'compiler' into an environment variable:
    environment_options = {'CXX': options['compiler']}
    del options['compiler']

    # Avoid going through the build stage if we are not using the build
    # result.
    if not (args.notest and args.nobench):
      build_rc = BuildAll(options, args.jobs, environment_options)
      # Don't run the tests for this configuration if the build failed.
      if build_rc != 0:
        rc.Combine(build_rc)
        continue

      # Use the realpath of the test executable so that the commands printed
      # can be copy-pasted and run.
      test_executable = util.relrealpath(
        join(config.dir_build_latest, 'test', 'test-runner'))

      if not args.notest:
        printer.Print(test_executable)
        tests.Add(
            test_executable,
            args.filters,
            list())

      if not args.nobench:
        rc.Combine(RunBenchmarks(options, args))

  rc.Combine(tests.Run(args.jobs, args.verbose))
  if not args.dry_run:
    rc.PrintStatus()

  sys.exit(rc.Value)