#!/usr/bin/env python3
#
# Copyright (C) 2016 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Module containing common logic from python testing tools."""
import abc
import os
import signal
import shlex
import shutil
import time
from enum
import Enum
from enum
import unique
from subprocess
import DEVNULL
from subprocess
import check_call
from subprocess
import PIPE
from subprocess
import Popen
from subprocess
import STDOUT
from subprocess
import TimeoutExpired
from tempfile
import mkdtemp
from tempfile
import NamedTemporaryFile
# Temporary directory path on device.
DEVICE_TMP_PATH =
'/data/local/tmp'
# Architectures supported in dalvik cache.
DALVIK_CACHE_ARCHS = [
'arm',
'arm64',
'x86',
'x86_64']
@unique
class RetCode(Enum):
"""Enum representing normalized return codes."""
SUCCESS =
0
TIMEOUT =
1
ERROR =
2
NOTCOMPILED =
3
NOTRUN =
4
@unique
class LogSeverity(Enum):
VERBOSE =
0
DEBUG =
1
INFO =
2
WARNING =
3
ERROR =
4
FATAL =
5
SILENT =
6
@property
def symbol(self):
return self.name[
0]
@classmethod
def FromSymbol(cls, s):
for log_severity
in LogSeverity:
if log_severity.symbol == s:
return log_severity
raise ValueError(
"{0} is not a valid log severity symbol".format(s))
def __ge__(self, other):
if self.__class__
is other.__class__:
return self.value >= other.value
return NotImplemented
def __gt__(self, other):
if self.__class__
is other.__class__:
return self.value > other.value
return NotImplemented
def __le__(self, other):
if self.__class__
is other.__class__:
return self.value <= other.value
return NotImplemented
def __lt__(self, other):
if self.__class__
is other.__class__:
return self.value < other.value
return NotImplemented
def GetEnvVariableOrError(variable_name):
"""Gets value of an environmental variable.
If the variable
is not set raises FatalError.
Args:
variable_name: string, name of variable to get.
Returns:
string, value of requested variable.
Raises:
FatalError: Requested variable
is not set.
"""
top = os.environ.get(variable_name)
if top
is None:
raise FatalError(
'{0} environmental variable not set.'.format(
variable_name))
return top
def _DexArchCachePaths(android_data_path):
"""Returns paths to architecture specific caches.
Args:
android_data_path: string, path dalvik-cache resides
in.
Returns:
Iterable paths to architecture specific caches.
"""
return (
'{0}/dalvik-cache/{1}'.format(android_data_path, arch)
for arch
in DALVIK_CACHE_ARCHS)
def RunCommandForOutput(cmd, env, stdout, stderr, timeout=
60):
"""Runs command piping output to files, stderr or stdout.
Args:
cmd: list of strings, command to run.
env: shell environment to run the command
with.
stdout: file handle
or one of Subprocess.PIPE, Subprocess.STDOUT,
Subprocess.DEVNULL, see Popen.
stderr: file handle
or one of Subprocess.PIPE, Subprocess.STDOUT,
Subprocess.DEVNULL, see Popen.
timeout: int, timeout
in seconds.
Returns:
tuple (string, string, RetCode) stdout output, stderr output, normalized
return code.
"""
proc = Popen(cmd, stdout=stdout, stderr=stderr, env=env,
universal_newlines=
True, start_new_session=
True)
try:
(output, stderr_output) = proc.communicate(timeout=timeout)
if proc.returncode ==
0:
retcode = RetCode.SUCCESS
else:
retcode = RetCode.ERROR
except TimeoutExpired:
os.killpg(os.getpgid(proc.pid), signal.SIGTERM)
(output, stderr_output) = proc.communicate()
retcode = RetCode.TIMEOUT
return (output, stderr_output, retcode)
def _LogCmdOutput(logfile, cmd, output, retcode):
"""Logs output of a command.
Args:
logfile: file handle to logfile.
cmd: list of strings, command.
output: command output.
retcode: RetCode, normalized retcode.
"""
logfile.write(
'Command:\n{0}\n{1}\nReturn code: {2}\n'.format(
CommandListToCommandString(cmd), output, retcode))
def RunCommand(cmd, out, err, timeout=
5):
"""Executes a command, and returns its return code.
Args:
cmd: list of strings, a command to execute
out: string, file name to open
for stdout (
or None)
err: string, file name to open
for stderr (
or None)
timeout: int, time out
in seconds
Returns:
RetCode,
return code of running command (forced RetCode.TIMEOUT
on timeout)
"""
devnull = DEVNULL
outf = devnull
if out
is not None:
outf = open(out, mode=
'w')
errf = devnull
if err
is not None:
errf = open(err, mode=
'w')
(_, _, retcode) = RunCommandForOutput(cmd,
None, outf, errf, timeout)
if outf != devnull:
outf.close()
if errf != devnull:
errf.close()
return retcode
def CommandListToCommandString(cmd):
"""Converts shell command represented as list of strings to a single string.
Each element of the list
is wrapped
in double quotes.
Args:
cmd: list of strings, shell command.
Returns:
string, shell command.
"""
return ' '.join([shlex.quote(segment)
for segment
in cmd])
class FatalError(Exception):
"""Fatal error in script."""
class ITestEnv(object):
"""Test environment abstraction.
Provides unified interface
for interacting
with host
and device test
environments. Creates a test directory
and expose methods to modify test files
and run commands.
"""
__meta_class__ = abc.ABCMeta
@abc.abstractmethod
def CreateFile(self, name=
None):
"""Creates a file in test directory.
Returned path to file can be used
in commands run
in the environment.
Args:
name: string, file name.
If None file
is named arbitrarily.
Returns:
string, environment specific path to file.
"""
@abc.abstractmethod
def WriteLines(self, file_path, lines):
"""Writes lines to a file in test directory.
If file exists it gets overwritten.
If file doest
not exist it
is created.
Args:
file_path: string, environment specific path to file.
lines: list of strings to write.
"""
@abc.abstractmethod
def RunCommand(self, cmd, log_severity=LogSeverity.ERROR):
"""Runs command in environment.
Args:
cmd: list of strings, command to run.
log_severity: LogSeverity, minimum severity of logs included
in output.
Returns:
tuple (string, int) output,
return code.
"""
@abc.abstractproperty
def logfile(self):
"""Gets file handle to logfile residing on host."""
class HostTestEnv(ITestEnv):
"""Host test environment. Concrete implementation of ITestEnv.
Maintains a test directory
in /tmp/. Runs commands on the host
in modified
shell environment. Mimics art script behavior.
For methods documentation see base
class.
"""
def __init__(self, directory_prefix, cleanup=
True, logfile_path=
None,
timeout=
60, x64=
False):
"""Constructor.
Args:
directory_prefix: string, prefix
for environment directory name.
cleanup: boolean,
if True remove test directory
in destructor.
logfile_path: string, can be used to specify custom logfile location.
timeout: int, seconds, time to wait
for single test run to finish.
x64: boolean, whether to setup
in x64 mode.
"""
self._cleanup = cleanup
self._timeout = timeout
self._env_path = mkdtemp(dir=
'/tmp/', prefix=directory_prefix)
if logfile_path
is None:
self._logfile = open(
'{0}/log'.format(self._env_path),
'w+')
else:
self._logfile = open(logfile_path,
'w+')
os.mkdir(
'{0}/dalvik-cache'.format(self._env_path))
for arch_cache_path
in _DexArchCachePaths(self._env_path):
os.mkdir(arch_cache_path)
lib =
'lib64' if x64
else 'lib'
android_root = GetEnvVariableOrError(
'ANDROID_HOST_OUT')
android_i18n_root = android_root +
'/com.android.i18n'
android_art_root = android_root +
'/com.android.art'
android_tzdata_root = android_root +
'/com.android.tzdata'
library_path = android_root +
'/' + lib
path = android_root +
'/bin'
self._shell_env = os.environ.copy()
self._shell_env[
'ANDROID_DATA'] = self._env_path
self._shell_env[
'ANDROID_ROOT'] = android_root
self._shell_env[
'ANDROID_I18N_ROOT'] = android_i18n_root
self._shell_env[
'ANDROID_ART_ROOT'] = android_art_root
self._shell_env[
'ANDROID_TZDATA_ROOT'] = android_tzdata_root
self._shell_env[
'LD_LIBRARY_PATH'] = library_path
self._shell_env[
'DYLD_LIBRARY_PATH'] = library_path
self._shell_env[
'PATH'] = (path +
':' + self._shell_env[
'PATH'])
# Using dlopen requires load bias on the host.
self._shell_env[
'LD_USE_LOAD_BIAS'] =
'1'
def __del__(self):
if self._cleanup:
shutil.rmtree(self._env_path)
def CreateFile(self, name=
None):
if name
is None:
f = NamedTemporaryFile(dir=self._env_path, delete=
False)
else:
f = open(
'{0}/{1}'.format(self._env_path, name),
'w+')
return f.name
def WriteLines(self, file_path, lines):
with open(file_path,
'w')
as f:
f.writelines(
'{0}\n'.format(line)
for line
in lines)
return
def RunCommand(self, cmd, log_severity=LogSeverity.ERROR):
self._EmptyDexCache()
env = self._shell_env.copy()
env.update({
'ANDROID_LOG_TAGS':
'*:' + log_severity.symbol.lower()})
(output, err_output, retcode) = RunCommandForOutput(
cmd, env, PIPE, PIPE, self._timeout)
# We append err_output to output to stay consistent with DeviceTestEnv
# implementation.
output += err_output
_LogCmdOutput(self._logfile, cmd, output, retcode)
return (output, retcode)
@property
def logfile(self):
return self._logfile
def _EmptyDexCache(self):
"""Empties dex cache.
Iterate over files
in architecture specific cache directories
and remove
them.
"""
for arch_cache_path
in _DexArchCachePaths(self._env_path):
for file_path
in os.listdir(arch_cache_path):
file_path =
'{0}/{1}'.format(arch_cache_path, file_path)
if os.path.isfile(file_path):
os.unlink(file_path)
class DeviceTestEnv(ITestEnv):
"""Device test environment. Concrete implementation of ITestEnv.
For methods documentation see base
class.
"""
def __init__(self, directory_prefix, cleanup=
True, logfile_path=
None,
timeout=
60, specific_device=
None):
"""Constructor.
Args:
directory_prefix: string, prefix
for environment directory name.
cleanup: boolean,
if True remove test directory
in destructor.
logfile_path: string, can be used to specify custom logfile location.
timeout: int, seconds, time to wait
for single test run to finish.
specific_device: string, serial number of device to use.
"""
self._cleanup = cleanup
self._timeout = timeout
self._specific_device = specific_device
self._host_env_path = mkdtemp(dir=
'/tmp/', prefix=directory_prefix)
if logfile_path
is None:
self._logfile = open(
'{0}/log'.format(self._host_env_path),
'w+')
else:
self._logfile = open(logfile_path,
'w+')
self._device_env_path =
'{0}/{1}'.format(
DEVICE_TMP_PATH, os.path.basename(self._host_env_path))
self._shell_env = os.environ.copy()
self._AdbMkdir(
'{0}/dalvik-cache'.format(self._device_env_path))
for arch_cache_path
in _DexArchCachePaths(self._device_env_path):
self._AdbMkdir(arch_cache_path)
def __del__(self):
if self._cleanup:
shutil.rmtree(self._host_env_path)
check_call(shlex.split(
'adb shell if [ -d "{0}" ]; then rm -rf "{0}"; fi'
.format(self._device_env_path)))
def CreateFile(self, name=
None):
with NamedTemporaryFile(mode=
'w')
as temp_file:
self._AdbPush(temp_file.name, self._device_env_path)
if name
is None:
name = os.path.basename(temp_file.name)
return '{0}/{1}'.format(self._device_env_path, name)
def WriteLines(self, file_path, lines):
with NamedTemporaryFile(mode=
'w')
as temp_file:
temp_file.writelines(
'{0}\n'.format(line)
for line
in lines)
temp_file.flush()
self._AdbPush(temp_file.name, file_path)
return
def _ExtractPid(self, brief_log_line):
"""Extracts PID from a single logcat line in brief format."""
pid_start_idx = brief_log_line.find(
'(') +
2
if pid_start_idx == -
1:
return None
pid_end_idx = brief_log_line.find(
')', pid_start_idx)
if pid_end_idx == -
1:
return None
return brief_log_line[pid_start_idx:pid_end_idx]
def _ExtractSeverity(self, brief_log_line):
"""Extracts LogSeverity from a single logcat line in brief format."""
if not brief_log_line:
return None
return LogSeverity.FromSymbol(brief_log_line[
0])
def RunCommand(self, cmd, log_severity=LogSeverity.ERROR):
self._EmptyDexCache()
env_vars_cmd =
'ANDROID_DATA={0} ANDROID_LOG_TAGS=*:i'.format(
self._device_env_path)
adb_cmd = [
'adb']
if self._specific_device:
adb_cmd += [
'-s', self._specific_device]
logcat_cmd = adb_cmd + [
'logcat',
'-v',
'brief',
'-s',
'-b',
'main',
'-T',
'1',
'dex2oat:*',
'dex2oatd:*']
logcat_proc = Popen(logcat_cmd, stdout=PIPE, stderr=STDOUT,
universal_newlines=
True)
cmd_str = CommandListToCommandString(cmd)
# Print PID of the shell and exec command. We later retrieve this PID and
# use it to filter dex2oat logs, keeping those with matching parent PID.
device_cmd = (
'echo $$ && ' + env_vars_cmd +
' exec ' + cmd_str)
cmd = adb_cmd + [
'shell', device_cmd]
(output, _, retcode) = RunCommandForOutput(cmd, self._shell_env, PIPE,
STDOUT, self._timeout)
# We need to make sure to only kill logcat once all relevant logs arrive.
# Sleep is used for simplicity.
time.sleep(
0.
5)
logcat_proc.kill()
end_of_first_line = output.find(
'\n')
if end_of_first_line != -
1:
parent_pid = output[:end_of_first_line]
output = output[end_of_first_line +
1:]
logcat_output, _ = logcat_proc.communicate()
logcat_lines = logcat_output.splitlines(keepends=
True)
dex2oat_pids = []
for line
in logcat_lines:
# Dex2oat was started by our runtime instance.
if 'Running dex2oat (parent PID = ' + parent_pid
in line:
dex2oat_pids.append(self._ExtractPid(line))
break
if dex2oat_pids:
for line
in logcat_lines:
if (self._ExtractPid(line)
in dex2oat_pids
and
self._ExtractSeverity(line) >= log_severity):
output += line
_LogCmdOutput(self._logfile, cmd, output, retcode)
return (output, retcode)
@property
def logfile(self):
return self._logfile
def PushClasspath(self, classpath):
"""Push classpath to on-device test directory.
Classpath can contain multiple colon separated file paths, each file
is
pushed. Returns analogous classpath
with paths valid on device.
Args:
classpath: string, classpath
in format
'a/b/c:d/e/f'.
Returns:
string, classpath valid on device.
"""
paths = classpath.split(
':')
device_paths = []
for path
in paths:
device_paths.append(
'{0}/{1}'.format(
self._device_env_path, os.path.basename(path)))
self._AdbPush(path, self._device_env_path)
return ':'.join(device_paths)
def _AdbPush(self, what, where):
check_call(shlex.split(
'adb push "{0}" "{1}"'.format(what, where)),
stdout=self._logfile, stderr=self._logfile)
def _AdbMkdir(self, path):
check_call(shlex.split(
'adb shell mkdir "{0}" -p'.format(path)),
stdout=self._logfile, stderr=self._logfile)
def _EmptyDexCache(self):
"""Empties dex cache."""
for arch_cache_path
in _DexArchCachePaths(self._device_env_path):
cmd =
'adb shell if [ -d "{0}" ]; then rm -f "{0}"/*; fi'.format(
arch_cache_path)
check_call(shlex.split(cmd), stdout=self._logfile, stderr=self._logfile)