view contrib/showstack.py @ 47869:bf47cc3799ea stable

clone: verify the local clone in test-clone-stream.t This will help detecting corruption. Differential Revision: https://phab.mercurial-scm.org/D11338
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Wed, 25 Aug 2021 10:42:09 +0200
parents 2372284d9457
children 6000f5b25c9b
line wrap: on
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# showstack.py - extension to dump a Python stack trace on signal
#
# binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)
r"""dump stack trace when receiving SIGQUIT (Ctrl-\) or SIGINFO (Ctrl-T on BSDs)
"""

from __future__ import absolute_import, print_function
import signal
import sys
import traceback


def sigshow(*args):
    sys.stderr.write("\n")
    traceback.print_stack(args[1], limit=10, file=sys.stderr)
    sys.stderr.write("----\n")


def sigexit(*args):
    sigshow(*args)
    print('alarm!')
    sys.exit(1)


def extsetup(ui):
    signal.signal(signal.SIGQUIT, sigshow)
    signal.signal(signal.SIGALRM, sigexit)
    try:
        signal.signal(signal.SIGINFO, sigshow)
    except AttributeError:
        pass