contrib/showstack.py
author Gregory Szorc <gregory.szorc@gmail.com>
Tue, 22 Jan 2019 17:08:53 -0800
changeset 41317 4ad002b2584d
parent 40036 acf5dbe39478
child 41548 6dae1f31c6c9
permissions -rw-r--r--
config: reject str sections and keys on Python 3 Otherwise we could end up with a dict having both the str and bytes versions of a particular config item. This may cause some tests to regress. I haven't checked. But it is better behavior to fail fast. We could just as easily change this to normalize the values. But I like catching all non-compliant call sites first. Differential Revision: https://phab.mercurial-scm.org/D5649

# 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