diff options
author | Hsin-Yi Chen <hsinyichen@google.com> | 2020-02-21 22:57:15 +0800 |
---|---|---|
committer | Hsin-Yi Chen <hsinyichen@google.com> | 2020-03-11 14:13:32 +0800 |
commit | d78aabf83d4c971bdfd52828df2738ee2f19cf2c (patch) | |
tree | 13c6cfd32bf003d6ccd78b51826cf934a3b57be8 | |
parent | 2d354379a0ed78bf0a777bde65025557df077377 (diff) | |
download | vndk-d78aabf83d4c971bdfd52828df2738ee2f19cf2c.tar.gz |
Add vts_vndk_abi_test
This commit copies VtsVndkAbiTest.py to vts_vndk_abi_test.py, removes
the dependency on VTS framework, and adds a python_host_test module for
the new file. The module also includes the dump data converted from
prebuilts/abi-dumps/vndk.
Bug: 147454897
Test: ANDROID_SERIAL=1234 \
LD_LIBRARY_PATH=$ANDROID_HOST_OUT/lib64 \
$ANDROID_HOST_OUT/nativetest64/vts_vndk_abi_test/vts_vndk_abi_test \
--verbose
Test: LD_LIBRARY_PATH=$ANDROID_HOST_OUT/lib64 atest vts_vndk_abi_test
Change-Id: Ie9fbe764d6b57e2c10fad8541bd6effe7c5c34b6
Merged-In: Ie9fbe764d6b57e2c10fad8541bd6effe7c5c34b6
(cherry picked from commit a75e7230754d8f1a5cc54187c8c928ae2f13fa0c)
-rw-r--r-- | Android.bp | 16 | ||||
-rw-r--r-- | abi/vts_vndk_abi_test.py | 361 | ||||
-rw-r--r-- | abi/vts_vndk_abi_test.xml | 22 | ||||
-rw-r--r-- | golden/Android.bp | 10 | ||||
-rwxr-xr-x | golden/extract_lsdump.py | 53 | ||||
-rw-r--r-- | golden/vndk_data.py | 82 | ||||
-rw-r--r-- | utils.py | 48 |
7 files changed, 581 insertions, 11 deletions
@@ -51,6 +51,22 @@ python_defaults { } python_test_host { + name: "vts_vndk_abi_test", + defaults: ["vts_vndk_default"], + main: "abi/vts_vndk_abi_test.py", + srcs: [ + "abi/vts_vndk_abi_test.py", + ], + data: [ + ":vts_vndk_abi_dump_zip", + ], + test_suites: [ + "vts-core", + ], + test_config: "abi/vts_vndk_abi_test.xml", +} + +python_test_host { name: "vts_vndk_dependency_test", defaults: ["vts_vndk_default"], main: "dependency/vts_vndk_dependency_test.py", diff --git a/abi/vts_vndk_abi_test.py b/abi/vts_vndk_abi_test.py new file mode 100644 index 0000000..56a5220 --- /dev/null +++ b/abi/vts_vndk_abi_test.py @@ -0,0 +1,361 @@ +#!/usr/bin/env python3 +# +# Copyright (C) 2020 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. +# + +import json +import logging +import os +import shutil +import tempfile +import unittest + +from vts.testcases.vndk import utils +from vts.testcases.vndk.golden import vndk_data +from vts.utils.python.library import elf_parser +from vts.utils.python.library.vtable import vtable_dumper +from vts.utils.python.vndk import vndk_utils + + +class VtsVndkAbiTest(unittest.TestCase): + """A test module to verify ABI compliance of vendor libraries. + + Attributes: + _dut: the AndroidDevice under test. + _temp_dir: The temporary directory for libraries copied from device. + """ + + def setUp(self): + """Initializes data file path, device, and temporary directory.""" + serial_number = os.environ.get("ANDROID_SERIAL", "") + self.assertTrue(serial_number, "$ANDROID_SERIAL is empty") + self._dut = utils.AndroidDevice(serial_number) + self._temp_dir = tempfile.mkdtemp() + + def tearDown(self): + """Deletes the temporary directory.""" + logging.info("Delete %s", self._temp_dir) + shutil.rmtree(self._temp_dir) + + def _PullOrCreateDir(self, target_dir, host_dir): + """Copies a directory from device. Creates an empty one if not exist. + + Args: + target_dir: The directory to copy from device. + host_dir: The directory to copy to host. + """ + if not self._dut.IsDirectory(target_dir): + logging.info("%s doesn't exist. Create %s.", target_dir, host_dir) + os.makedirs(host_dir) + return + parent_dir = os.path.dirname(host_dir) + if parent_dir and not os.path.isdir(parent_dir): + os.makedirs(parent_dir) + logging.info("adb pull %s %s", target_dir, host_dir) + self._dut.AdbPull(target_dir, host_dir) + + def _ToHostPath(self, target_path): + """Maps target path to host path in self._temp_dir.""" + return os.path.join(self._temp_dir, *target_path.strip("/").split("/")) + + @staticmethod + def _LoadGlobalSymbolsFromDump(dump_obj): + """Loads global symbols from a dump object. + + Args: + dump_obj: A dict, the dump in JSON format. + + Returns: + A set of strings, the symbol names. + """ + symbols = set() + for key in ("elf_functions", "elf_objects"): + symbols.update( + symbol.get("name", "") for symbol in dump_obj.get(key, []) if + symbol.get("binding", "global") == "global") + return symbols + + def _DiffElfSymbols(self, dump_obj, parser): + """Checks if a library includes all symbols in a dump. + + Args: + dump_obj: A dict, the dump in JSON format. + parser: An elf_parser.ElfParser that loads the library. + + Returns: + A list of strings, the global symbols that are in the dump but not + in the library. + + Raises: + elf_parser.ElfError if fails to load the library. + """ + dump_symbols = self._LoadGlobalSymbolsFromDump(dump_obj) + lib_symbols = parser.ListGlobalDynamicSymbols(include_weak=True) + return sorted(dump_symbols.difference(lib_symbols)) + + @staticmethod + def _DiffVtableComponent(offset, expected_symbol, vtable): + """Checks if a symbol is in a vtable entry. + + Args: + offset: An integer, the offset of the expected symbol. + expected_symbol: A string, the name of the expected symbol. + vtable: A dict of {offset: [entry]} where offset is an integer and + entry is an instance of vtable_dumper.VtableEntry. + + Returns: + A list of strings, the actual possible symbols if expected_symbol + does not match the vtable entry. + None if expected_symbol matches the entry. + """ + if offset not in vtable: + return [] + + entry = vtable[offset] + if not entry.names: + return [hex(entry.value).rstrip('L')] + + if expected_symbol not in entry.names: + return entry.names + + def _DiffVtableComponents(self, dump_obj, dumper): + """Checks if a library includes all vtable entries in a dump. + + Args: + dump_obj: A dict, the dump in JSON format. + dumper: An vtable_dumper.VtableDumper that loads the library. + bitness: 32 or 64, the size of the vtable entries. + + Returns: + A list of tuples (VTABLE, OFFSET, EXPECTED_SYMBOL, ACTUAL). + ACTUAL can be "missing", a list of symbol names, or an ELF virtual + address. + + Raises: + vtable_dumper.VtableError if fails to dump vtable from the library. + """ + function_kinds = [ + "function_pointer", + "complete_dtor_pointer", + "deleting_dtor_pointer" + ] + non_function_kinds = [ + "vcall_offset", + "vbase_offset", + "offset_to_top", + "rtti", + "unused_function_pointer" + ] + default_vtable_component_kind = "function_pointer" + + global_symbols = self._LoadGlobalSymbolsFromDump(dump_obj) + + lib_vtables = {vtable.name: vtable + for vtable in dumper.DumpVtables()} + logging.debug("\n\n".join(str(vtable) + for _, vtable in lib_vtables.items())) + + vtables_diff = [] + for record_type in dump_obj.get("record_types", []): + # Since Android R, unique_id has been replaced with linker_set_key. + # unique_id starts with "_ZTI"; linker_set_key starts with "_ZTS". + type_name_symbol = record_type.get("unique_id", "") + if type_name_symbol: + vtable_symbol = type_name_symbol.replace("_ZTS", "_ZTV", 1) + else: + type_name_symbol = record_type.get("linker_set_key", "") + vtable_symbol = type_name_symbol.replace("_ZTI", "_ZTV", 1) + + # Skip if the vtable symbol isn't global. + if vtable_symbol not in global_symbols: + continue + + # Collect vtable entries from library dump. + if vtable_symbol in lib_vtables: + lib_vtable = {entry.offset: entry + for entry in lib_vtables[vtable_symbol].entries} + else: + lib_vtable = dict() + + for index, entry in enumerate(record_type.get("vtable_components", + [])): + entry_offset = index * dumper.bitness // 8 + entry_kind = entry.get("kind", default_vtable_component_kind) + entry_symbol = entry.get("mangled_component_name", "") + entry_is_pure = entry.get("is_pure", False) + + if entry_kind in non_function_kinds: + continue + + if entry_kind not in function_kinds: + logging.warning("%s: Unexpected vtable entry kind %s", + vtable_symbol, entry_kind) + + if entry_symbol not in global_symbols: + # Itanium cxx abi doesn't specify pure virtual vtable + # entry's behaviour. However we can still do some checks + # based on compiler behaviour. + # Even though we don't check weak symbols, we can still + # issue a warning when a pure virtual function pointer + # is missing. + if entry_is_pure and entry_offset not in lib_vtable: + logging.warning("%s: Expected pure virtual function" + "in %s offset %s", + vtable_symbol, vtable_symbol, + entry_offset) + continue + + diff_symbols = self._DiffVtableComponent( + entry_offset, entry_symbol, lib_vtable) + if diff_symbols is None: + continue + + vtables_diff.append( + (vtable_symbol, str(entry_offset), entry_symbol, + (",".join(diff_symbols) if diff_symbols else "missing"))) + + return vtables_diff + + def _ScanLibDirs(self, dump_zip, dump_paths, lib_dirs, dump_version): + """Compares dump files with libraries copied from device. + + Args: + dump_zip: A zip_file.ZipFile object containing the dumps. + dump_paths: A dict of {library name: dump resource path}. + lib_dirs: The list of directories containing libraries. + dump_version: The VNDK version of the dump files. If the device has + no VNDK version or has extension in vendor partition, + this method compares the unversioned VNDK directories + with the dump directories of the given version. + + Returns: + A list of strings, the incompatible libraries. + """ + error_list = [] + lib_paths = dict() + for lib_dir in lib_dirs: + for parent_dir, dir_names, lib_names in os.walk(lib_dir): + for lib_name in lib_names: + if lib_name not in lib_paths: + lib_paths[lib_name] = os.path.join(parent_dir, + lib_name) + for lib_name, dump_path in dump_paths.items(): + if lib_name not in lib_paths: + logging.info("%s: Not found on target", lib_name) + continue + lib_path = lib_paths[lib_name] + rel_path = os.path.relpath(lib_path, self._temp_dir) + + has_exception = False + missing_symbols = [] + vtable_diff = [] + + try: + with dump_zip.open(dump_path, "r") as dump_file: + dump_obj = json.load(dump_file) + with vtable_dumper.VtableDumper(lib_path) as dumper: + missing_symbols = self._DiffElfSymbols( + dump_obj, dumper) + vtable_diff = self._DiffVtableComponents( + dump_obj, dumper) + except (IOError, + elf_parser.ElfError, + vtable_dumper.VtableError) as e: + logging.exception("%s: Cannot diff ABI", rel_path) + has_exception = True + + if missing_symbols: + logging.error("%s: Missing Symbols:\n%s", + rel_path, "\n".join(missing_symbols)) + if vtable_diff: + logging.error("%s: Vtable Difference:\n" + "vtable offset expected actual\n%s", + rel_path, + "\n".join(" ".join(e) for e in vtable_diff)) + if (has_exception or missing_symbols or vtable_diff): + error_list.append(rel_path) + else: + logging.info("%s: Pass", rel_path) + return error_list + + @staticmethod + def _GetLinkerSearchIndex(target_path): + """Returns the key for sorting linker search paths.""" + index = 0 + for prefix in ("/odm", "/vendor", "/apex"): + if target_path.startswith(prefix): + return index + index += 1 + return index + + def _TestAbiCompatibility(self, bitness): + """Checks ABI compliance of VNDK libraries. + + Args: + bitness: 32 or 64, the bitness of the tested libraries. + """ + self.assertTrue(self._dut.IsRoot(), "This test requires adb root.") + primary_abi = self._dut.GetCpuAbiList()[0] + binder_bitness = self._dut.GetBinderBitness() + self.assertTrue(binder_bitness, "Cannot determine binder bitness.") + dump_version = self._dut.GetVndkVersion() + self.assertTrue(dump_version, "Cannot determine VNDK version.") + + dump_paths = vndk_data.GetAbiDumpPathsFromResources( + dump_version, + binder_bitness, + primary_abi, + bitness) + self.assertTrue( + dump_paths, + "No dump files. version: %s ABI: %s bitness: %d" % ( + dump_version, primary_abi, bitness)) + + target_dirs = vndk_utils.GetVndkExtDirectories(bitness) + target_dirs += vndk_utils.GetVndkSpExtDirectories(bitness) + target_dirs += [vndk_utils.GetVndkDirectory(bitness, dump_version)] + target_dirs.sort(key=self._GetLinkerSearchIndex) + + host_dirs = [self._ToHostPath(x) for x in target_dirs] + for target_dir, host_dir in zip(target_dirs, host_dirs): + self._PullOrCreateDir(target_dir, host_dir) + + with vndk_data.AbiDumpResource() as dump_resource: + assert_lines = self._ScanLibDirs(dump_resource.zip_file, + dump_paths, host_dirs, + dump_version) + + if assert_lines: + error_count = len(assert_lines) + if error_count > 20: + assert_lines = assert_lines[:20] + ["..."] + assert_lines.append("Total number of errors: " + str(error_count)) + self.fail("\n".join(assert_lines)) + + def testAbiCompatibility32(self): + """Checks ABI compliance of 32-bit VNDK libraries.""" + self._TestAbiCompatibility(32) + + def testAbiCompatibility64(self): + """Checks ABI compliance of 64-bit VNDK libraries.""" + if self._dut.GetCpuAbiList(64): + self._TestAbiCompatibility(64) + else: + logging.info("Skip the test as the device doesn't support 64-bit " + "ABI.") + + +if __name__ == "__main__": + unittest.main() diff --git a/abi/vts_vndk_abi_test.xml b/abi/vts_vndk_abi_test.xml new file mode 100644 index 0000000..7fc7321 --- /dev/null +++ b/abi/vts_vndk_abi_test.xml @@ -0,0 +1,22 @@ +<?xml version="1.0" encoding="utf-8"?> +<!-- Copyright (C) 2020 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. +--> +<configuration description="Config for vts_vndk_abi_test"> + <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer" /> + <test class="com.android.tradefed.testtype.python.PythonBinaryHostTest"> + <option name="par-file-name" value="vts_vndk_abi_test" /> + <option name="test-timeout" value="3m" /> + </test> +</configuration> diff --git a/golden/Android.bp b/golden/Android.bp index 20222e1..c9abdaa 100644 --- a/golden/Android.bp +++ b/golden/Android.bp @@ -26,3 +26,13 @@ python_binary_host { }, } } + +// TODO(b/150663999): Replace with gensrcs when the build system is able to +// process the large file group. +genrule { + name: "vts_vndk_abi_dump_zip", + tools: ["extract_lsdump"], + cmd: "$(location extract_lsdump) $(in) $(out)", + srcs: [":vndk_abi_dump_zip"], + out: ["vts/testcases/vndk/abi_dump.zip"], +} diff --git a/golden/extract_lsdump.py b/golden/extract_lsdump.py index a6d95c7..fd42be6 100755 --- a/golden/extract_lsdump.py +++ b/golden/extract_lsdump.py @@ -19,6 +19,7 @@ import argparse import gzip import json import os +import zipfile class LsdumpError(Exception): @@ -205,35 +206,62 @@ def _ParseVtablesFromLsdump(lsdump, output_dump): output_dump.record_types.append(record_type) -def ParseLsdumpFile(input_path, output_path): - """Converts an lsdump file to a dump file for the ABI test. +def _ParseLsdumpFileObject(lsdump_file): + """Converts an lsdump file to a dump object. Args: - input_path: The path to the (gzipped) lsdump file. - output_path: The path to the output dump file. + lsdump_file: The file object of the input lsdump. + + Returns: + The AttrDict object converted from the lsdump file. Raises: LsdumpError if fails to create the dump file. """ try: - with _OpenFileOrGzipped(input_path) as lsdump_file: - lsdump = json.load(lsdump_file, object_hook=AttrDict) - except (IOError, ValueError) as e: + lsdump = json.load(lsdump_file, object_hook=AttrDict) + except ValueError: raise LsdumpError(e) try: output_dump = AttrDict() _ParseVtablesFromLsdump(lsdump, output_dump) _ParseSymbolsFromLsdump(lsdump, output_dump) + return output_dump except AttributeError as e: raise LsdumpError(e) + +def _ParseLsdumpZipFile(lsdump_zip, output_zip): + """Converts zipped lsdump files to the dump files for ABI test.""" + for name in lsdump_zip.namelist(): + if name.endswith(".lsdump"): + with lsdump_zip.open(name, mode="r") as lsdump_file: + output_dump = _ParseLsdumpFileObject(lsdump_file) + output_str = json.dumps(output_dump, indent=1, + separators=(',', ':')) + output_zip.writestr(name, output_str) + + +def ParseLsdumpFile(input_path, output_path): + """Converts an lsdump file to a dump file for the ABI test. + + Args: + input_path: The path to the (gzipped) lsdump file. + output_path: The path to the output dump file. + + Raises: + LsdumpError if fails to create the dump file. + """ abs_output_path = os.path.abspath(output_path) abs_output_dir = os.path.dirname(abs_output_path) try: if abs_output_dir and not os.path.exists(abs_output_dir): os.makedirs(abs_output_dir) + + with _OpenFileOrGzipped(input_path) as lsdump_file: + output_dump = _ParseLsdumpFileObject(lsdump_file) with open(output_path, 'wb') as output_file: json.dump(output_dump, output_file, indent=1, separators=(',', ':')) @@ -251,6 +279,17 @@ def main(): help='output dump file path.') args = arg_parser.parse_args() + # TODO(b/150663999): Remove this when the build system is able to process + # the large file group. + if zipfile.is_zipfile(args.input_path): + with zipfile.ZipFile(args.input_path, mode='r') as input_zip: + # The zip will be added to a Python package. It is not necessary + # to reduce the file size. + with zipfile.ZipFile(args.output_path, mode='w', + compression=zipfile.ZIP_STORED) as output_zip: + _ParseLsdumpZipFile(input_zip, output_zip) + exit(0) + try: ParseLsdumpFile(args.input_path, args.output_path) except LsdumpError as e: diff --git a/golden/vndk_data.py b/golden/vndk_data.py index 4eb127d..ffa1527 100644 --- a/golden/vndk_data.py +++ b/golden/vndk_data.py @@ -15,9 +15,11 @@ # import collections +import json import logging import os import re +import zipfile try: from importlib import resources @@ -47,9 +49,16 @@ VNDK_SP = "VNDK-SP" # VNDK-SP dependencies that vendor modules cannot directly access. VNDK_SP_PRIVATE = "VNDK-SP-private" -# The ABI dump directories. 64-bit comes before 32-bit in order to sequentially -# search for longest prefix. -_ABI_NAMES = ("arm64", "arm", "mips64", "mips", "x86_64", "x86") +# The tuples of (ABI name, bitness, arch name). 64-bit comes before 32-bit in +# order to sequentially search for longest prefix. +_ABI_LIST = ( + ("arm64", 64, "arm64_armv8-a"), + ("arm64", 32, "arm_armv8-a"), + ("arm", 32, "arm_armv7-a-neon"), + ("x86_64", 64, "x86_x86_64"), + ("x86_64", 32, "x86_64"), + ("x86", 32, "x86"), +) # The data directory. _GOLDEN_DIR = os.path.join("vts", "testcases", "vndk", "golden") @@ -57,6 +66,9 @@ _GOLDEN_DIR = os.path.join("vts", "testcases", "vndk", "golden") # The data package. _RESOURCE_PACKAGE = "vts.testcases.vndk"; +# The name of the zip file containing ABI dumps. +_ABI_DUMP_ZIP_NAME = "abi_dump.zip" + # Regular expression prefix for library name patterns. _REGEX_PREFIX = "[regex]" @@ -95,7 +107,7 @@ def GetAbiDumpDirectory(data_file_path, version, binder_bitness, abi_name, None if there is no directory for the version and ABI. """ try: - abi_dir = next(x for x in _ABI_NAMES if abi_name.startswith(x)) + abi_dir = next(x[0] for x in _ABI_LIST if abi_name.startswith(x[0])) except StopIteration: logging.warning("Unknown ABI %s.", abi_name) return None @@ -117,6 +129,68 @@ def GetAbiDumpDirectory(data_file_path, version, binder_bitness, abi_name, return dump_dir +class AbiDumpResource: + """The class for loading ABI dumps from the zip in resources.""" + + def __init__(self): + self._resource = None + self.zip_file = None + + def __enter__(self): + self._resource = resources.open_binary(_RESOURCE_PACKAGE, + _ABI_DUMP_ZIP_NAME) + self.zip_file = zipfile.ZipFile(self._resource, "r") + return self + + def __exit__(self, exc_type, exc_val, traceback): + if self._resource: + self._resource.close() + if self.zip_file: + self.zip_file.close() + + +def GetAbiDumpPathsFromResources(version, binder_bitness, abi_name, abi_bitness): + """Returns the VNDK dump paths in resources. + + Args: + version: A string, the VNDK version. + binder_bitness: A string or an integer, 32 or 64. + abi_name: A string, the ABI of the library dump. + abi_bitness: A string or an integer, 32 or 64. + + Returns: + A dict of {library name: dump resource path}. For example, + {"libbase.so": "R/64/arm64_armv8-a/source-based/libbase.so.lsdump"}. + If there is no dump for the version and ABI, this function returns an + empty dict. + """ + if not resources: + logging.error("Could not import resources module.") + return dict() + + abi_bitness = int(abi_bitness) + try: + arch_name = next(x[2] for x in _ABI_LIST if + abi_name.startswith(x[0]) and x[1] == abi_bitness) + except StopIteration: + logging.warning("Unknown %d-bit ABI %s.", abi_bitness, abi_name) + return dict() + + # The separator in zipped path is always "/". + dump_dir = "/".join((version, str(binder_bitness), arch_name, + "source-based")) + "/" + + dump_paths = dict() + + with AbiDumpResource() as dump_resource: + for path in dump_resource.zip_file.namelist(): + if path.startswith(dump_dir) and path.endswith(".lsdump"): + lib_name = path[len(dump_dir):-len(".lsdump")] + dump_paths[lib_name] = path + + return dump_paths + + def _LoadVndkLibraryListsFile(vndk_lists, tags, vndk_lib_list_file): """Load VNDK libraries from the file to the specified tuple. @@ -18,8 +18,11 @@ # TODO(b/147454897): Keep the logic in sync with # test/vts/utils/python/controllers/android_device.py until # it is removed. +import gzip import logging +import os import subprocess +import tempfile class AndroidDevice(object): """This class controls the device via adb commands.""" @@ -141,6 +144,51 @@ class AndroidDevice(object): """Gets the VNDK version that the vendor partition requests.""" return self._GetProp("ro.vndk.version") + def GetKernelConfig(self, config_name): + """Gets kernel config from the device. + + Args: + config_name: A string, the name of the configuration. + + Returns: + "y" or "m" if the config is set. + "" if the config is not set. + None if fails to read config. + """ + line_prefix = config_name + "=" + with tempfile.NamedTemporaryFile(delete=False) as temp_file: + config_path = temp_file.name + try: + logging.debug("Pull config.gz to %s", config_path) + self.AdbPull("/proc/config.gz", config_path) + with gzip.open(config_path, "rt") as config_file: + for line in config_file: + if line.strip().startswith(line_prefix): + logging.debug("Found config: %s", line) + return line.strip()[len(line_prefix):] + logging.debug("%s is not set.", config_name) + return "" + except (subprocess.CalledProcessError, IOError) as e: + logging.exception("Cannot read kernel config.", e) + return None + finally: + os.remove(config_path) + + def GetBinderBitness(self): + """Returns the value of BINDER_IPC_32BIT in kernel config. + + Returns: + 32 or 64, binder bitness of the device. + None if fails to read config. + """ + config_value = self.GetKernelConfig("CONFIG_ANDROID_BINDER_IPC_32BIT") + if config_value is None: + return None + elif config_value: + return 32 + else: + return 64 + def IsRoot(self): """Returns whether adb has root privilege on the device.""" out, err, return_code = self.Execute("id") |