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# Copyright 2016 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.
import contextlib
import os
import sys
from pylib import constants
DIR_SOURCE_ROOT = os.environ.get(
'CHECKOUT_SOURCE_ROOT',
os.path.abspath(os.path.join(os.path.dirname(__file__),
os.pardir, os.pardir, os.pardir, os.pardir)))
BUILD_COMMON_PATH = os.path.join(
DIR_SOURCE_ROOT, 'build', 'util', 'lib', 'common')
# third-party libraries
ANDROID_PLATFORM_DEVELOPMENT_SCRIPTS_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'android_platform', 'development',
'scripts')
DEVIL_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'catapult', 'devil')
PYMOCK_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'pymock')
TRACING_PATH = os.path.join(
DIR_SOURCE_ROOT, 'third_party', 'catapult', 'tracing')
@contextlib.contextmanager
def SysPath(path, position=None):
if position is None:
sys.path.append(path)
else:
sys.path.insert(position, path)
try:
yield
finally:
if sys.path[-1] == path:
sys.path.pop()
else:
sys.path.remove(path)
# Map of CPU architecture name to (toolchain_name, binprefix) pairs.
# TODO(digit): Use the build_vars.txt file generated by gn.
_TOOL_ARCH_MAP = {
'arm': ('arm-linux-androideabi-4.9', 'arm-linux-androideabi'),
'arm64': ('aarch64-linux-android-4.9', 'aarch64-linux-android'),
'x86': ('x86-4.9', 'i686-linux-android'),
'x86_64': ('x86_64-4.9', 'x86_64-linux-android'),
'x64': ('x86_64-4.9', 'x86_64-linux-android'),
'mips': ('mipsel-linux-android-4.9', 'mipsel-linux-android'),
}
# Cache used to speed up the results of ToolPath()
# Maps (arch, tool_name) pairs to fully qualified program paths.
# Useful because ToolPath() is called repeatedly for demangling C++ symbols.
_cached_tool_paths = {}
def ToolPath(tool, cpu_arch):
"""Return a fully qualifed path to an arch-specific toolchain program.
Args:
tool: Unprefixed toolchain program name (e.g. 'objdump')
cpu_arch: Target CPU architecture (e.g. 'arm64')
Returns:
Fully qualified path (e.g. ..../aarch64-linux-android-objdump')
Raises:
Exception if the toolchain could not be found.
"""
tool_path = _cached_tool_paths.get((tool, cpu_arch))
if tool_path:
return tool_path
toolchain_source, toolchain_prefix = _TOOL_ARCH_MAP.get(
cpu_arch, (None, None))
if not toolchain_source:
raise Exception('Could not find tool chain for ' + cpu_arch)
toolchain_subdir = (
'toolchains/%s/prebuilt/linux-x86_64/bin' % toolchain_source)
tool_path = os.path.join(constants.ANDROID_NDK_ROOT,
toolchain_subdir,
toolchain_prefix + '-' + tool)
_cached_tool_paths[(tool, cpu_arch)] = tool_path
return tool_path
def GetAaptPath():
"""Returns the path to the 'aapt' executable."""
return os.path.join(constants.ANDROID_SDK_TOOLS, 'aapt')
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