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#!/usr/bin/env python
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from __future__ import print_function, unicode_literals

import math, os, posixpath, shlex, shutil, subprocess, sys, traceback

def add_libdir_to_path():
    from os.path import dirname, exists, join, realpath
    js_src_dir = dirname(dirname(realpath(sys.argv[0])))
    assert exists(join(js_src_dir, 'jsapi.h'))
    sys.path.insert(0, join(js_src_dir, 'lib'))
    sys.path.insert(0, join(js_src_dir, 'tests', 'lib'))

add_libdir_to_path()

import jittests
from tests import get_jitflags, get_cpu_count, get_environment_overlay, \
                  change_env

# Python 3.3 added shutil.which, but we can't use that yet.
def which(name):
    if name.find(os.path.sep) != -1:
        return os.path.abspath(name)

    for path in os.environ["PATH"].split(os.pathsep):
        full = os.path.join(path, name)
        if os.path.exists(full):
            return os.path.abspath(full)

    return name

def main(argv):
    # The [TESTS] optional arguments are paths of test files relative
    # to the jit-test/tests directory.
    from optparse import OptionParser
    op = OptionParser(usage='%prog [options] JS_SHELL [TESTS]')
    op.add_option('-s', '--show-cmd', dest='show_cmd', action='store_true',
                  help='show js shell command run')
    op.add_option('-f', '--show-failed-cmd', dest='show_failed',
                  action='store_true',
                  help='show command lines of failed tests')
    op.add_option('-o', '--show-output', dest='show_output',
                  action='store_true',
                  help='show output from js shell')
    op.add_option('-F', '--failed-only', dest='failed_only',
                  action='store_true',
                  help="if --show-output is given, only print output for"
                  " failed tests")
    op.add_option('--no-show-failed', dest='no_show_failed',
                  action='store_true',
                  help="don't print output for failed tests"
                  " (no-op with --show-output)")
    op.add_option('-x', '--exclude', dest='exclude', action='append',
                  help='exclude given test dir or path')
    op.add_option('--slow', dest='run_slow', action='store_true',
                  help='also run tests marked as slow')
    op.add_option('--no-slow', dest='run_slow', action='store_false',
                  help='do not run tests marked as slow (the default)')
    op.add_option('-t', '--timeout', dest='timeout', type=float, default=150.0,
                  help='set test timeout in seconds')
    op.add_option('--no-progress', dest='hide_progress', action='store_true',
                  help='hide progress bar')
    op.add_option('--tinderbox', dest='format', action='store_const',
                  const='automation',
                  help='Use automation-parseable output format')
    op.add_option('--format', dest='format', default='none', type='choice',
                  choices=['automation', 'none'],
                  help='Output format. Either automation or none'
                  ' (default %default).')
    op.add_option('--args', dest='shell_args', default='',
                  help='extra args to pass to the JS shell')
    op.add_option('-w', '--write-failures', dest='write_failures',
                  metavar='FILE',
                  help='Write a list of failed tests to [FILE]')
    op.add_option('-r', '--read-tests', dest='read_tests', metavar='FILE',
                  help='Run test files listed in [FILE]')
    op.add_option('-R', '--retest', dest='retest', metavar='FILE',
                  help='Retest using test list file [FILE]')
    op.add_option('-g', '--debug', action='store_const', const='gdb', dest='debugger',
                  help='Run a single test under the gdb debugger')
    op.add_option('-G', '--debug-rr', action='store_const', const='rr', dest='debugger',
                  help='Run a single test under the rr debugger')
    op.add_option('--debugger', type='string',
                  help='Run a single test under the specified debugger')
    op.add_option('--valgrind', dest='valgrind', action='store_true',
                  help='Enable the |valgrind| flag, if valgrind is in $PATH.')
    op.add_option('--valgrind-all', dest='valgrind_all', action='store_true',
                  help='Run all tests with valgrind, if valgrind is in $PATH.')
    op.add_option('--jitflags', dest='jitflags', default='none', type='string',
                  help='IonMonkey option combinations. One of all, debug,'
                  ' ion, and none (default %default).')
    op.add_option('--avoid-stdio', dest='avoid_stdio', action='store_true',
                  help='Use js-shell file indirection instead of piping stdio.')
    op.add_option('--write-failure-output', dest='write_failure_output',
                  action='store_true',
                  help='With --write-failures=FILE, additionally write the'
                  ' output of failed tests to [FILE]')
    op.add_option('--ion', dest='ion', action='store_true',
                  help='Run tests once with --ion-eager and once with'
                  ' --baseline-eager (ignores --jitflags)')
    op.add_option('--tbpl', dest='tbpl', action='store_true',
                  help='Run tests with all IonMonkey option combinations'
                  ' (ignores --jitflags)')
    op.add_option('-j', '--worker-count', dest='max_jobs', type=int,
                  default=max(1, get_cpu_count()),
                  help='Number of tests to run in parallel (default %default)')
    op.add_option('--remote', action='store_true',
                  help='Run tests on a remote device')
    op.add_option('--deviceIP', action='store',
                  type='string', dest='device_ip',
                  help='IP address of remote device to test')
    op.add_option('--devicePort', action='store',
                  type=int, dest='device_port', default=20701,
                  help='port of remote device to test')
    op.add_option('--deviceSerial', action='store',
                  type='string', dest='device_serial', default=None,
                  help='ADB device serial number of remote device to test')
    op.add_option('--deviceTransport', action='store',
                  type='string', dest='device_transport', default='sut',
                  help='The transport to use to communicate with device:'
                  ' [adb|sut]; default=sut')
    op.add_option('--remoteTestRoot', dest='remote_test_root', action='store',
                  type='string', default='/data/local/tests',
                  help='The remote directory to use as test root'
                  ' (eg. /data/local/tests)')
    op.add_option('--localLib', dest='local_lib', action='store',
                  type='string',
                  help='The location of libraries to push -- preferably'
                  ' stripped')
    op.add_option('--repeat', type=int, default=1,
                  help='Repeat tests the given number of times.')
    op.add_option('--this-chunk', type=int, default=1,
                  help='The test chunk to run.')
    op.add_option('--total-chunks', type=int, default=1,
                  help='The total number of test chunks.')
    op.add_option('--ignore-timeouts', dest='ignore_timeouts', metavar='FILE',
                  help='Ignore timeouts of tests listed in [FILE]')

    options, args = op.parse_args(argv)
    if len(args) < 1:
        op.error('missing JS_SHELL argument')
    js_shell = which(args[0])
    test_args = args[1:]
    test_environment = get_environment_overlay(js_shell)

    if jittests.stdio_might_be_broken():
        # Prefer erring on the side of caution and not using stdio if
        # it might be broken on this platform.  The file-redirect
        # fallback should work on any platform, so at worst by
        # guessing wrong we might have slowed down the tests a bit.
        #
        # XXX technically we could check for broken stdio, but it
        # really seems like overkill.
        options.avoid_stdio = True

    if options.retest:
        options.read_tests = options.retest
        options.write_failures = options.retest

    test_list = []
    read_all = True

    # Forbid running several variants of the same asmjs test, when debugging.
    options.can_test_also_noasmjs = not options.debugger

    if test_args:
        read_all = False
        for arg in test_args:
            test_list += jittests.find_tests(arg)

    if options.read_tests:
        read_all = False
        try:
            f = open(options.read_tests)
            for line in f:
                test_list.append(os.path.join(jittests.TEST_DIR,
                                              line.strip('\n')))
            f.close()
        except IOError:
            if options.retest:
                read_all = True
            else:
                sys.stderr.write("Exception thrown trying to read test file"
                                 " '{}'\n".format(options.read_tests))
                traceback.print_exc()
                sys.stderr.write('---\n')

    if read_all:
        test_list = jittests.find_tests()

    if options.exclude:
        exclude_list = []
        for exclude in options.exclude:
            exclude_list += jittests.find_tests(exclude)
        test_list = [test for test in test_list
                     if test not in set(exclude_list)]

    if not test_list:
        print("No tests found matching command line arguments.",
              file=sys.stderr)
        sys.exit(0)

    test_list = [jittests.JitTest.from_file(_, options) for _ in test_list]

    if not options.run_slow:
        test_list = [_ for _ in test_list if not _.slow]

    # If chunking is enabled, determine which tests are part of this chunk.
    # This code was adapted from testing/mochitest/runtestsremote.py.
    if options.total_chunks > 1:
        total_tests = len(test_list)
        tests_per_chunk = math.ceil(total_tests / float(options.total_chunks))
        start = int(round((options.this_chunk - 1) * tests_per_chunk))
        end = int(round(options.this_chunk * tests_per_chunk))
        test_list = test_list[start:end]

    # The full test list is ready. Now create copies for each JIT configuration.
    job_list = []
    test_flags = []
    if options.tbpl:
        # Running all bits would take forever. Instead, we test a few
        # interesting combinations.
        test_flags = get_jitflags('all')
    elif options.ion:
        test_flags = get_jitflags('ion')
    else:
        test_flags = get_jitflags(options.jitflags)

    job_list = [_ for test in test_list
                for _ in test.copy_variants(test_flags)]

    if options.ignore_timeouts:
        read_all = False
        try:
            with open(options.ignore_timeouts) as f:
                options.ignore_timeouts = set(
                    [line.strip('\n') for line in f.readlines()])
        except IOError:
            sys.exit("Error reading file: " + options.ignore_timeouts)
    else:
        options.ignore_timeouts = set()

    prefix = [js_shell] + shlex.split(options.shell_args)
    prologue = os.path.join(jittests.LIB_DIR, 'prologue.js')
    if options.remote:
        prologue = posixpath.join(options.remote_test_root,
                                'jit-tests', 'jit-tests', 'lib', 'prologue.js')

    prefix += ['-f', prologue]

    # Clean up any remnants from previous crashes etc
    shutil.rmtree(jittests.JS_CACHE_DIR, ignore_errors=True)
    os.mkdir(jittests.JS_CACHE_DIR)

    if options.debugger:
        if len(job_list) > 1:
            print('Multiple tests match command line'
                  ' arguments, debugger can only run one')
            for tc in job_list:
                print('    {}'.format(tc.path))
            sys.exit(1)

        tc = job_list[0]
        if options.debugger == 'gdb':
            debug_cmd = ['gdb', '--args']
        elif options.debugger == 'lldb':
            debug_cmd = ['lldb', '--']
        elif options.debugger == 'rr':
            debug_cmd = ['rr', 'record']
        else:
            debug_cmd = options.debugger.split()

        with change_env(test_environment):
            subprocess.call(debug_cmd + tc.command(prefix, jittests.LIB_DIR))
            if options.debugger == 'rr':
                subprocess.call(['rr', 'replay'])
        sys.exit()

    try:
        ok = None
        if options.remote:
            ok = jittests.run_tests_remote(job_list, prefix, options)
        else:
            with change_env(test_environment):
                ok = jittests.run_tests(job_list, prefix, options)
        if not ok:
            sys.exit(2)
    except OSError:
        if not os.path.exists(prefix[0]):
            print("JS shell argument: file does not exist:"
                  " '{}'".format(prefix[0]), file=sys.stderr)
            sys.exit(1)
        else:
            raise

if __name__ == '__main__':
    main(sys.argv[1:])