| #!/usr/bin/env python |
| # Copyright (C) 2017 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. |
| |
| from __future__ import print_function |
| import argparse |
| import datetime |
| import os |
| import subprocess |
| import sys |
| |
| """Pulls all format files from an Android device. |
| |
| Usage: ./tools/pull_ftrace_format_files.py [-s serial] [-p directory_prefix] |
| """ |
| |
| ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) |
| ADB_PATH = os.path.join(ROOT_DIR, 'buildtools/android_sdk/platform-tools/adb') |
| |
| def adb(*cmd, **kwargs): |
| serial = kwargs.get('serial', None) |
| prefix = [ADB_PATH] |
| if serial: |
| prefix += ['-s', serial] |
| cmd = prefix + list(cmd) |
| output = subprocess.check_output(cmd).replace('\r', '') |
| return output |
| |
| |
| def get_devices(): |
| # adb devices output looks like: |
| # List of devices attached |
| # 557dccd8\tdevice |
| # With a trailing newline. |
| serials = [s.split('\t')[0] for s in adb('devices').split('\n')[1:] if s] |
| return serials |
| |
| |
| def ensure_output_directory_empty(path): |
| if os.path.isfile(path): |
| print('The output directory {} exists as a file.'.format(path)) |
| sys.exit(1) |
| |
| if os.path.isdir(path) and os.listdir(path): |
| print('The output directory {} exists but is not empty.'.format(path)) |
| sys.exit(1) |
| |
| if not os.path.isdir(path): |
| os.makedirs(path) |
| |
| |
| def ensure_dir(path): |
| try: |
| os.makedirs(path) |
| except OSError: |
| if not os.path.isdir(path): |
| raise |
| |
| |
| def ensure_single_device(serial): |
| serials = get_devices() |
| if serial is None and len(serials) == 1: |
| return serials[0] |
| |
| if serial in serials: |
| return serial |
| |
| if not serials: |
| print('No devices connected.') |
| elif serial is None: |
| print('More than one device connected, use -s.') |
| else: |
| print('No device with serial {} found.'.format(serial)) |
| sys.exit(1) |
| |
| |
| def pull_format_files(serial, output_directory): |
| # Pulling each file individually is 100x slower so we pipe all together then |
| # split them on the host. |
| cmd = "find /sys/kernel/debug/tracing/ " \ |
| "-name available_events -o " \ |
| "-name format -o " \ |
| "-name header_event -o " \ |
| "-name header_page | " \ |
| "while read f; do echo 'path:' $f; cat $f; done" |
| |
| output = adb('shell', cmd, serial=serial) |
| sections = output.split('path: /sys/kernel/debug/tracing/') |
| for section in sections: |
| if not section: |
| continue |
| path, rest = section.split('\n', 1) |
| path = os.path.join(output_directory, path) |
| ensure_dir(os.path.dirname(path)) |
| with open(path, 'wb') as f: |
| f.write(rest) |
| |
| |
| # Produces output of the form: prefix_android_seed_N2F62_3.10.49 |
| def get_output_directory(prefix=None, serial=None): |
| build_id = adb('shell', 'getprop', 'ro.build.id', serial=serial).strip() |
| product = adb('shell', 'getprop', 'ro.build.product', serial=serial).strip() |
| kernel = adb('shell', 'uname', '-r', serial=serial).split('-')[0].strip() |
| parts = ['android', product, build_id, kernel] |
| if prefix: |
| parts = [prefix] + parts |
| return '_'.join(parts) |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser(description='Pull format files.') |
| parser.add_argument('-p', dest='prefix', default=None, |
| help='the output directory prefix') |
| parser.add_argument('-s', dest='serial', default=None, |
| help='use device with the given serial') |
| args = parser.parse_args() |
| |
| prefix = args.prefix |
| serial = args.serial |
| |
| serial = ensure_single_device(serial) |
| output_directory = get_output_directory(prefix, serial) |
| |
| ensure_output_directory_empty(output_directory) |
| pull_format_files(serial, output_directory) |
| |
| return 0 |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |
| |