contrib/showstack.py
author Rodrigo Damazio <rdamazio@google.com>
Fri, 12 Oct 2018 17:57:36 +0200
changeset 40292 9c6473d2038b
parent 40036 acf5dbe39478
child 41548 6dae1f31c6c9
permissions -rw-r--r--
help: splitting the topics by category Differential Revision: https://phab.mercurial-scm.org/D5066

# showstack.py - extension to dump a Python stack trace on signal
#
# binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)
"""dump stack trace when receiving SIGQUIT (Ctrl-\) and 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