blob: 34c2f47a83ffe0ce6e7b0fb6f6f3d570f54f6f48 [file] [log] [blame]
# Copyright 2019 The Chromium OS 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 base64, dbus, json, logging, os
from subprocess import Popen, PIPE
from threading import Thread
from autotest_lib.client.bin import test
from autotest_lib.client.common_lib import error
from autotest_lib.client.cros import debugd_util
class PipeReader():
The class to read from a pipe. Intended for running off the main thread.
def __init__(self, pipe_r):
self.pipe_r = pipe_r
def read(self):
Drain from self.pipe_r and store the result in self.result. This method
runs in a new thread.
# Read feedback logs content (JSON) from pipe_r.
self.result = os.fdopen(self.pipe_r, 'r').read()
class platform_DebugDaemonPerfDataInFeedbackLogs(test.test):
This autotest tests perf profile in feedback logs. It calls the debugd
method GetBigFeedbackLogs and checks whether 'perf-data' is present in the
returned logs. The perf data is base64-encoded lzma-compressed quipper
version = 1
def xz_decompress_string(self, compressed_input):
xz-decompresses a string.
@param compressed_input: The input string to be decompressed.
The decompressed string.
process = Popen('/usr/bin/xz -d', stdout=PIPE, stderr=PIPE, stdin=PIPE,
out, err = process.communicate(input=compressed_input)
if len(err) > 0:
raise error.TestFail('decompress() failed with %s' % err)'decompress() %d -> %d bytes', len(compressed_input),
return out
def validate_perf_data_in_feedback_logs(self):
Validate that feedback logs contain valid perf data.
pipe_r, pipe_w = os.pipe()
# GetBigFeedbackReport transfers large content through the pipe. We
# need to read from the pipe off-thread to prevent a deadlock.
pipe_reader = PipeReader(pipe_r)
thread = Thread(target =
# Use 180-sec timeout because GetBigFeedbackLogs runs arc-bugreport,
# which takes a while to finish.
debugd_util.iface().GetBigFeedbackLogs(dbus.types.UnixFd(pipe_w), '',
signature='hs', timeout=180)
# pipe_w is dup()'d in calling dbus. Close in this process.
# Decode into a dictionary.
logs = json.loads(pipe_reader.result)
if len(logs) == 0:
raise error.TestFail('GetBigFeedbackLogs() returned no data')'GetBigFeedbackLogs() returned %d elements.', len(logs))
perf_data = logs['perf-data']
if perf_data is None:
raise error.TestFail('perf-data not found in feedback logs')
BLOB_START_TOKEN = '<base64>: '
blob_start = perf_data.index(BLOB_START_TOKEN)
raise error.TestFail(("perf-data doesn't include base64 encoded"
# Skip description text and BLOB_START_TOKEN
perf_data = perf_data[blob_start + len(BLOB_START_TOKEN):]'base64 perf data: %d bytes', len(perf_data))
# This raises TypeError if input is invalid base64-encoded data.
compressed_data = base64.b64decode(perf_data)
protobuff = self.xz_decompress_string(compressed_data)
if len(protobuff) < 10:
raise error.TestFail('Perf output too small (%d bytes)' %
if protobuff.startswith('<process exited with status: '):
raise error.TestFail('Failed to capture a profile: %s' %
def run_once(self, *args, **kwargs):
Primary autotest function.