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#! /usr/bin/env python
# Copyright 2015 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 argparse
import collections
import os
import re
import shutil
import sys
import tempfile
import zipfile
import devil_chromium
from devil.android.sdk import dexdump
from pylib.constants import host_paths
sys.path.append(os.path.join(host_paths.DIR_SOURCE_ROOT, 'build', 'util', 'lib',
'common'))
import perf_tests_results_helper # pylint: disable=import-error
# Example dexdump output:
# DEX file header:
# magic : 'dex\n035\0'
# checksum : b664fc68
# signature : ae73...87f1
# file_size : 4579656
# header_size : 112
# link_size : 0
# link_off : 0 (0x000000)
# string_ids_size : 46148
# string_ids_off : 112 (0x000070)
# type_ids_size : 5730
# type_ids_off : 184704 (0x02d180)
# proto_ids_size : 8289
# proto_ids_off : 207624 (0x032b08)
# field_ids_size : 17854
# field_ids_off : 307092 (0x04af94)
# method_ids_size : 33699
# method_ids_off : 449924 (0x06dd84)
# class_defs_size : 2616
# class_defs_off : 719516 (0x0afa9c)
# data_size : 3776428
# data_off : 803228 (0x0c419c)
# For what these mean, refer to:
# https://source.android.com/devices/tech/dalvik/dex-format.html
CONTRIBUTORS_TO_DEX_CACHE = {'type_ids_size': 'types',
'string_ids_size': 'strings',
'method_ids_size': 'methods',
'field_ids_size': 'fields'}
def _ExtractSizesFromDexFile(dex_path):
counts = {}
for line in dexdump.DexDump(dex_path, file_summary=True):
if not line.strip():
# Each method, type, field, and string contributes 4 bytes (1 reference)
# to our DexCache size.
counts['dex_cache_size'] = (
sum(counts[x] for x in CONTRIBUTORS_TO_DEX_CACHE)) * 4
return counts
m = re.match(r'([a-z_]+_size) *: (\d+)', line)
if m:
counts[m.group(1)] = int(m.group(2))
raise Exception('Unexpected end of output.')
def ExtractSizesFromZip(path):
tmpdir = tempfile.mkdtemp(suffix='_dex_extract')
try:
counts = collections.defaultdict(int)
with zipfile.ZipFile(path, 'r') as z:
for subpath in z.namelist():
if not subpath.endswith('.dex'):
continue
extracted_path = z.extract(subpath, tmpdir)
cur_counts = _ExtractSizesFromDexFile(extracted_path)
for k in cur_counts:
counts[k] += cur_counts[k]
return dict(counts)
finally:
shutil.rmtree(tmpdir)
def main():
parser = argparse.ArgumentParser()
parser.add_argument(
'--apk-name', help='Name of the APK to which the dexfile corresponds.')
parser.add_argument('dexfile')
args = parser.parse_args()
devil_chromium.Initialize()
if not args.apk_name:
dirname, basename = os.path.split(args.dexfile)
while basename:
if 'apk' in basename:
args.apk_name = basename
break
dirname, basename = os.path.split(dirname)
else:
parser.error(
'Unable to determine apk name from %s, '
'and --apk-name was not provided.' % args.dexfile)
if os.path.splitext(args.dexfile)[1] in ('.zip', '.apk', '.jar'):
sizes = ExtractSizesFromZip(args.dexfile)
else:
sizes = _ExtractSizesFromDexFile(args.dexfile)
def print_result(name, value_key, description=None):
perf_tests_results_helper.PrintPerfResult(
'%s_%s' % (args.apk_name, name), 'total', [sizes[value_key]],
description or name)
for dex_header_name, readable_name in CONTRIBUTORS_TO_DEX_CACHE.iteritems():
print_result(readable_name, dex_header_name)
print_result(
'DexCache_size', 'dex_cache_size', 'bytes of permanent dirty memory')
return 0
if __name__ == '__main__':
sys.exit(main())
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