89 lines
2.6 KiB
Python
89 lines
2.6 KiB
Python
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#!/usr/bin/env python
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#
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# Copyright 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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"""Symbolizes stack traces generated by Chromium for Android.
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Sample usage:
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adb logcat chromium:V | symbolize.py
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"""
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import os
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import re
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import sys
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from pylib import constants
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# Uses symbol.py from third_party/android_platform, not python's.
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sys.path.insert(0,
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os.path.join(constants.DIR_SOURCE_ROOT,
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'third_party/android_platform/development/scripts'))
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import symbol
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# Sample output from base/debug/stack_trace_android.cc
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#00 0x693cd34f /path/to/some/libfoo.so+0x0007434f
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TRACE_LINE = re.compile('(?P<frame>\#[0-9]+ 0x[0-9a-f]{8,8}) '
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'(?P<lib>[^+]+)\+0x(?P<addr>[0-9a-f]{8,8})')
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class Symbolizer(object):
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def __init__(self, output):
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self._output = output
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def write(self, data):
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while True:
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match = re.search(TRACE_LINE, data)
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if not match:
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self._output.write(data)
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break
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frame = match.group('frame')
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lib = match.group('lib')
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addr = match.group('addr')
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# TODO(scherkus): Doing a single lookup per line is pretty slow,
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# especially with larger libraries. Consider caching strategies such as:
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# 1) Have Python load the libraries and do symbol lookups instead of
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# calling out to addr2line each time.
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# 2) Have Python keep multiple addr2line instances open as subprocesses,
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# piping addresses and reading back symbols as we find them
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# 3) Read ahead the entire stack trace until we find no more, then batch
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# the symbol lookups.
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#
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# TODO(scherkus): These results are memoized, which could result in
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# incorrect lookups when running this script on long-lived instances
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# (e.g., adb logcat) when doing incremental development. Consider clearing
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# the cache when modification timestamp of libraries change.
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sym = symbol.SymbolInformation(lib, addr, False)[0][0]
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if not sym:
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post = match.end('addr')
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self._output.write(data[:post])
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data = data[post:]
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continue
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pre = match.start('frame')
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post = match.end('addr')
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self._output.write(data[:pre])
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self._output.write(frame)
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self._output.write(' ')
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self._output.write(sym)
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data = data[post:]
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def flush(self):
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self._output.flush()
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def main():
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symbolizer = Symbolizer(sys.stdout)
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for line in sys.stdin:
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symbolizer.write(line)
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symbolizer.flush()
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if __name__ == '__main__':
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main()
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