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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 os
import shutil
import tempfile
from xml.etree import ElementTree
from devil.utils import cmd_helper
from pylib import constants
DEXDUMP_PATH = os.path.join(constants.ANDROID_SDK_TOOLS, 'dexdump')
def Dump(apk_path):
"""Dumps class and method information from a APK into a dict via dexdump.
Args:
apk_path: An absolute path to an APK file to dump.
Returns:
A dict in the following format:
{
<package_name>: {
'classes': {
<class_name>: {
'methods': [<method_1>, <method_2>]
}
}
}
}
"""
# TODO(mikecase): Support multi-dex
try:
dexfile_dir = tempfile.mkdtemp()
# Python zipfile module is unable to unzip APKs.
cmd_helper.RunCmd(['unzip', apk_path, 'classes.dex'], cwd=dexfile_dir)
dexfile = os.path.join(dexfile_dir, 'classes.dex')
output_xml = cmd_helper.GetCmdOutput([DEXDUMP_PATH, '-l', 'xml', dexfile])
return _ParseRootNode(ElementTree.fromstring(output_xml))
finally:
shutil.rmtree(dexfile_dir)
def _ParseRootNode(root):
"""Parses the XML output of dexdump. This output is in the following format.
This is a subset of the information contained within dexdump output.
<api>
<package name="foo.bar">
<class name="Class" extends="foo.bar.SuperClass">
<field name="Field">
</field>
<constructor name="Method">
<parameter name="Param" type="int">
</parameter>
</constructor>
<method name="Method">
<parameter name="Param" type="int">
</parameter>
</method>
</class>
</package>
</api>
"""
results = {}
for child in root:
if child.tag == 'package':
package_name = child.attrib['name']
parsed_node = _ParsePackageNode(child)
if package_name in results:
results[package_name]['classes'].update(parsed_node['classes'])
else:
results[package_name] = parsed_node
return results
def _ParsePackageNode(package_node):
"""Parses a <package> node from the dexdump xml output.
Returns:
A dict in the format:
{
'classes': {
<class_1>: {
'methods': [<method_1>, <method_2>]
},
<class_2>: {
'methods': [<method_1>, <method_2>]
},
}
}
"""
classes = {}
for child in package_node:
if child.tag == 'class':
classes[child.attrib['name']] = _ParseClassNode(child)
return {'classes': classes}
def _ParseClassNode(class_node):
"""Parses a <class> node from the dexdump xml output.
Returns:
A dict in the format:
{
'methods': [<method_1>, <method_2>]
}
"""
methods = []
for child in class_node:
if child.tag == 'method':
methods.append(child.attrib['name'])
return {'methods': methods, 'superclass': class_node.attrib['extends']}
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