contrib/showstack.py
author Pierre-Yves David <pierre-yves.david@octobus.net>
Mon, 18 Jan 2021 10:20:58 +0100
branchstable
changeset 46474 dd926ce1de28
parent 43076 2372284d9457
child 48875 6000f5b25c9b
permissions -rw-r--r--
relnote: remove the reference to `debugstrip` The `debug` namespace is not intended for end user and advertising it is a path to confusion and trouble. I think we should wait for the `admin` namespace to exists and the command to be available as `admin--strip` before we advertise it. Differential Revision: https://phab.mercurial-scm.org/D9817

# 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