tools/tracebox

#!/usr/bin/env python3
# Copyright (C) 2021 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.

# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
# DO NOT EDIT. Auto-generated by tools/gen_amalgamated_python_tools
# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

# This file should do the same thing when being invoked in any of these ways:
# ./tracebox
# python tracebox
# bash tracebox
# cat ./tracebox | bash
# cat ./tracebox | python -

BASH_FALLBACK=""" "
exec python3 - "$@" <<'#'EOF
#"""  # yapf: disable


# ----- Amalgamator: begin of python/perfetto/prebuilts/manifests/tracebox.py
# This file has been generated by: tools/release/roll-prebuilts v55.2
TRACEBOX_MANIFEST = [{
    'arch':
        'mac-amd64',
    'file_name':
        'tracebox',
    'file_size':
        2280360,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/mac-amd64/tracebox',
    'sha256':
        '5bb01b2c4833419e790070118176747766391fb5ee92f015d09e02d91c561477',
    'platform':
        'darwin',
    'machine': ['x86_64']
}, {
    'arch':
        'mac-arm64',
    'file_name':
        'tracebox',
    'file_size':
        2112584,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/mac-arm64/tracebox',
    'sha256':
        'bba1b2d13644059f5d58560adc1856ce617ff6706d874de2d66ba305897098ce',
    'platform':
        'darwin',
    'machine': ['arm64']
}, {
    'arch':
        'linux-amd64',
    'file_name':
        'tracebox',
    'file_size':
        3155472,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/linux-amd64/tracebox',
    'sha256':
        '2058bc770c73b9dabea111379f2e30cc2ed72875f2e25093a13a4694cc41f304',
    'platform':
        'linux',
    'machine': ['x86_64']
}, {
    'arch':
        'linux-arm',
    'file_name':
        'tracebox',
    'file_size':
        1953940,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/linux-arm/tracebox',
    'sha256':
        'cdf8affe1612529567f1bf9b88c7dbd280bc55f6bafc4c53a9f0766d5a40c207',
    'platform':
        'linux',
    'machine': ['armv6l', 'armv7l', 'armv8l']
}, {
    'arch':
        'linux-arm64',
    'file_name':
        'tracebox',
    'file_size':
        3017088,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/linux-arm64/tracebox',
    'sha256':
        '08d7e5d3e483ddd513f4b8ef6baef737396f8845af1d76a1d423249630eb6887',
    'platform':
        'linux',
    'machine': ['aarch64']
}, {
    'arch':
        'android-arm',
    'file_name':
        'tracebox',
    'file_size':
        1788368,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/android-arm/tracebox',
    'sha256':
        'aa07196b29fbf89fd367c2a220a3272e4808bc6cbfd285a714f2c1098450b2a8'
}, {
    'arch':
        'android-arm64',
    'file_name':
        'tracebox',
    'file_size':
        2774424,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/android-arm64/tracebox',
    'sha256':
        '5ff770460695f8c983470d8bcad54d4075ca5c58a92450d3eb28b3f59f7ff7b8'
}, {
    'arch':
        'android-x86',
    'file_name':
        'tracebox',
    'file_size':
        3060984,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/android-x86/tracebox',
    'sha256':
        'a7c14ecf08b20bd9c7d3095a7c2633fecaddb5daa902821060cb150bb9b03636'
}, {
    'arch':
        'android-x64',
    'file_name':
        'tracebox',
    'file_size':
        2831984,
    'url':
        'https://commondatastorage.googleapis.com/perfetto-luci-artifacts/v55.2/android-x64/tracebox',
    'sha256':
        '9ce5df7a6f851286bc8c3105174ace39e249b6dbbd3df70e35cf59c8bdd0dce5'
}]

# ----- Amalgamator: end of python/perfetto/prebuilts/manifests/tracebox.py

# ----- Amalgamator: begin of python/perfetto/prebuilts/perfetto_prebuilts.py
# Copyright (C) 2021 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.
"""
Functions to fetch pre-pinned Perfetto prebuilts.

This function is used in different places:
- Into the //tools/{trace_processor, traceconv} scripts, which are just plain
  wrappers around executables.
- Into the //tools/{heap_profiler, record_android_trace} scripts, which contain
  some other hand-written python code.

The manifest argument looks as follows:
TRACECONV_MANIFEST = [
  {
    'arch': 'mac-amd64',
    'file_name': 'traceconv',
    'file_size': 7087080,
    'url': https://commondatastorage.googleapis.com/.../trace_to_text',
    'sha256': 7d957c005b0dc130f5bd855d6cec27e060d38841b320d04840afc569f9087490',
    'platform': 'darwin',
    'machine': 'x86_64'
  },
  ...
]

The intended usage is:

  from perfetto.prebuilts.manifests.traceconv import TRACECONV_MANIFEST
  bin_path = get_perfetto_prebuilt(TRACECONV_MANIFEST)
  subprocess.call(bin_path, ...)
"""

import hashlib
import os
import platform
import random
import subprocess
import sys


def download_or_get_cached(file_name, url, sha256):
  """ Downloads a prebuilt or returns a cached version

  The first time this is invoked, it downloads the |url| and caches it into
  ~/.local/share/perfetto/prebuilts/$tool_name. On subsequent invocations it
  just runs the cached version.
  """
  dir = os.path.join(
      os.path.expanduser('~'), '.local', 'share', 'perfetto', 'prebuilts')
  os.makedirs(dir, exist_ok=True)
  bin_path = os.path.join(dir, file_name)
  sha256_path = os.path.join(dir, file_name + '.sha256')
  needs_download = True

  # Avoid recomputing the SHA-256 on each invocation. The SHA-256 of the last
  # download is cached into file_name.sha256, just check if that matches.
  if os.path.exists(bin_path) and os.path.exists(sha256_path):
    with open(sha256_path, 'rb') as f:
      digest = f.read().decode()
      if digest == sha256:
        needs_download = False

  if needs_download:  # The file doesn't exist or the SHA256 doesn't match.
    # Use a unique random file to guard against concurrent executions.
    # See https://github.com/google/perfetto/issues/786 .
    tmp_path = '%s.%d.tmp' % (bin_path, random.randint(0, 100000))
    print('Downloading ' + url)
    subprocess.check_call(['curl', '-f', '-L', '-#', '-o', tmp_path, url])
    with open(tmp_path, 'rb') as fd:
      actual_sha256 = hashlib.sha256(fd.read()).hexdigest()
    if actual_sha256 != sha256:
      raise Exception('Checksum mismatch for %s (actual: %s, expected: %s)' %
                      (url, actual_sha256, sha256))
    os.chmod(tmp_path, 0o755)
    os.replace(tmp_path, bin_path)
    with open(tmp_path, 'w') as f:
      f.write(sha256)
    os.replace(tmp_path, sha256_path)
  return bin_path


def get_perfetto_prebuilt(manifest, soft_fail=False, arch=None):
  """ Downloads the prebuilt, if necessary, and returns its path on disk. """
  plat = sys.platform.lower()
  machine = platform.machine().lower()
  manifest_entry = None
  for entry in manifest:
    # If the caller overrides the arch, just match that (for Android prebuilts).
    if arch:
      if entry.get('arch') == arch:
        manifest_entry = entry
        break
      continue
    # Otherwise guess the local machine arch.
    if entry.get('platform') == plat and machine in entry.get('machine', []):
      manifest_entry = entry
      break
  if manifest_entry is None:
    if soft_fail:
      return None
    raise Exception(
        ('No prebuilts available for %s-%s\n' % (plat, machine)) +
        'See https://perfetto.dev/docs/contributing/build-instructions')

  # Placeholder entries (e.g. before a release has been rolled) have an empty
  # URL. Treat them the same as a missing entry when soft_fail is set.
  if not manifest_entry.get('url'):
    if soft_fail:
      return None
    raise Exception('No prebuilt URL available for %s on %s-%s. '
                    'The prebuilt may not have been rolled yet.' %
                    (manifest_entry.get('file_name', '?'), plat, machine))

  return download_or_get_cached(
      file_name=manifest_entry['file_name'],
      url=manifest_entry['url'],
      sha256=manifest_entry['sha256'])


def run_perfetto_prebuilt(manifest):
  bin_path = get_perfetto_prebuilt(manifest)
  if sys.platform.lower() == 'win32':
    sys.exit(subprocess.check_call([bin_path, *sys.argv[1:]]))
  os.execv(bin_path, [bin_path] + sys.argv[1:])


# ----- Amalgamator: end of python/perfetto/prebuilts/perfetto_prebuilts.py

if __name__ == '__main__':
  run_perfetto_prebuilt(TRACEBOX_MANIFEST)

#EOF