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cb19f2147e
Use universal_newlines as a convenient way of treating the process I/O as text, so string read/writes continue to succeed under python 3. Differential Revision: https://phabricator.services.mozilla.com/D81774
100 lines
3.4 KiB
Python
Executable File
100 lines
3.4 KiB
Python
Executable File
#!/usr/bin/python
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# vim:sw=4:ts=4:et:
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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# This script uses `fix-stacks` to post-process the entries produced by
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# MozFormatCodeAddress().
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from __future__ import absolute_import, print_function
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from subprocess import Popen, PIPE
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import atexit
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import os
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import platform
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import re
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import sys
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import six
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# Matches lines produced by MozFormatCodeAddress(), e.g.
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# `#01: ???[tests/example +0x43a0]`.
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line_re = re.compile("#\d+: .+\[.+ \+0x[0-9A-Fa-f]+\]")
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fix_stacks = None
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def fixSymbols(line, jsonMode=False, slowWarning=False, breakpadSymsDir=None, hide_errors=False):
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global fix_stacks
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line = six.ensure_str(line)
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result = line_re.search(line)
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if result is None:
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return line
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if not fix_stacks:
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# Look in MOZ_FETCHES_DIR (for automation), then in MOZBUILD_STATE_PATH
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# (for a local build where the user has that set), then in ~/.mozbuild
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# (for a local build with default settings).
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base = os.environ.get(
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'MOZ_FETCHES_DIR',
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os.environ.get(
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'MOZBUILD_STATE_PATH',
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os.path.expanduser('~/.mozbuild')
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)
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)
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fix_stacks_exe = base + '/fix-stacks/fix-stacks'
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if platform.system() == 'Windows':
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fix_stacks_exe = fix_stacks_exe + '.exe'
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if not (os.path.isfile(fix_stacks_exe) and os.access(fix_stacks_exe, os.X_OK)):
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raise Exception('cannot find `fix-stacks`; please run `./mach bootstrap`')
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args = [fix_stacks_exe]
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if jsonMode:
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args.append('-j')
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if breakpadSymsDir:
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# `fileid` should be packaged next to `fix_stacks.py`.
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here = os.path.dirname(__file__)
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fileid_exe = os.path.join(here, 'fileid')
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if platform.system() == 'Windows':
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fileid_exe = fileid_exe + '.exe'
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args.append('-b')
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args.append(breakpadSymsDir + "," + fileid_exe)
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# Sometimes we need to prevent errors from going to stderr.
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stderr = open(os.devnull) if hide_errors else None
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fix_stacks = Popen(args, stdin=PIPE, stdout=PIPE, stderr=stderr, universal_newlines=True)
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# Shut down the fix_stacks process on exit. We use `terminate()`
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# because it is more forceful than `wait()`, and the Python docs warn
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# about possible deadlocks with `wait()`.
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def cleanup(fix_stacks):
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fix_stacks.stdin.close()
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fix_stacks.terminate()
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atexit.register(cleanup, fix_stacks)
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if slowWarning:
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print("Initializing stack-fixing for the first stack frame, this may take a while...")
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# Sometimes `line` is lacking a trailing newline. If we pass such a `line`
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# to `fix-stacks` it will wait until it receives a newline, causing this
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# script to hang. So we add a newline if one is missing and then remove it
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# from the output.
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is_missing_newline = not line.endswith('\n')
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if is_missing_newline:
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line = line + "\n"
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fix_stacks.stdin.write(line)
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fix_stacks.stdin.flush()
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out = fix_stacks.stdout.readline()
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if is_missing_newline:
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out = out[:-1]
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return out
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if __name__ == "__main__":
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for line in sys.stdin:
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sys.stdout.write(fixSymbols(line))
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