зеркало из https://github.com/mozilla/gecko-dev.git
105 строки
3.4 KiB
Python
Executable File
105 строки
3.4 KiB
Python
Executable File
#!/usr/bin/env python3
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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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# 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 initFixStacks(jsonMode, slowWarning, breakpadSymsDir, hide_errors):
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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("MOZBUILD_STATE_PATH", os.path.expanduser("~/.mozbuild")),
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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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args.append("-b")
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args.append(breakpadSymsDir)
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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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global fix_stacks
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fix_stacks = Popen(
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args, stdin=PIPE, stdout=PIPE, stderr=stderr, universal_newlines=True
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)
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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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for fn in [fix_stacks.stdin.close, fix_stacks.terminate]:
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try:
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fn()
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except OSError:
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pass
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atexit.register(cleanup, fix_stacks)
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if slowWarning:
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print(
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"Initializing stack-fixing for the first stack frame, this may take a while..."
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)
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def fixSymbols(
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line, jsonMode=False, slowWarning=False, breakpadSymsDir=None, hide_errors=False
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):
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is_bytes = isinstance(line, bytes)
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line_str = line.decode("utf-8") if is_bytes else line
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if line_re.search(line_str) is None:
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return line
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if not fix_stacks:
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initFixStacks(jsonMode, slowWarning, breakpadSymsDir, hide_errors)
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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_str.endswith("\n")
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if is_missing_newline:
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line_str = line_str + "\n"
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fix_stacks.stdin.write(line_str)
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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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if is_bytes and not isinstance(out, bytes):
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out = out.encode("utf-8")
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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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