contrib/showstack.py
author Matt Harbison <matt_harbison@yahoo.com>
Thu, 11 Mar 2021 19:21:58 -0500
branchstable
changeset 46694 d6601547f22b
parent 43076 2372284d9457
child 48875 6000f5b25c9b
permissions -rw-r--r--
subrepo: handle unexpected file types from git gracefully This was flagged by pytype because `tar.extractfile(...)` can return None if the entry is not a file or symlink. I don't think that git supports other types, but better safe than sorry. Differential Revision: https://phab.mercurial-scm.org/D10179

# 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