# Copyright (C) 2013 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
class DumpReader(object):
"""Base class for breakpad dump readers."""
def __init__(self, host, build_dir):
self._host = host
self._build_dir = build_dir
def check_is_functional(self):
"""This routine must be implemented by subclasses.
Returns True if this reader is functional.
"""
raise NotImplementedError()
def crash_dumps_directory(self):
return self._host.filesystem.join(self._build_dir, 'crash-dumps')
def clobber_old_results(self):
if self._host.filesystem.isdir(self.crash_dumps_directory()):
self._host.filesystem.rmtree(self.crash_dumps_directory())
def look_for_new_crash_logs(self, crashed_processes, start_time):
if not crashed_processes:
return None
if not self.check_is_functional():
return None
pid_to_minidump = dict()
for root, _, files in self._host.filesystem.walk(
self.crash_dumps_directory()):
for dmp in [
f for f in files if f.endswith(self._file_extension())
]:
dmp_file = self._host.filesystem.join(root, dmp)
if self._host.filesystem.mtime(dmp_file) < start_time:
continue
pid = self._get_pid_from_dump(dmp_file)
if pid:
pid_to_minidump[pid] = dmp_file
result = dict()
for test, _, pid in crashed_processes:
if str(pid) in pid_to_minidump:
stack = self._get_stack_from_dump(pid_to_minidump[str(pid)])
if stack:
# TODO(xiaochengh): Find the real crash site.
result[test] = (
stack,
'Placeholder crash site generated by DumpReader')
return result
def _get_pid_from_dump(self, dump_file):
"""This routine must be implemented by subclasses.
This routine returns the PID of the crashed process that produced the given dump_file.
"""
raise NotImplementedError()
def _get_stack_from_dump(self, dump_file):
"""This routine must be implemented by subclasses.
Returns the stack stored in the given breakpad dump_file.
"""
raise NotImplementedError()
def _file_extension(self):
"""This routine must be implemented by subclasses.
Returns the file extension of crash dumps written by breakpad.
"""
raise NotImplementedError()
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