view contrib/showstack.py @ 42191:ae68418cc3a1 stable

buildrpm: bump bundled Python version to 2.7.16 when building for centos{5,6}

When building rpm packages for centos 5 and 6, we bundle a mercurial-specific
version of Python 2.7 in /opt/python-hg.

This change is analogous to 5e947367606c, and bumps the embedded Python version
from 2.7.14 (released in 2017) to 2.7.16 (latest as of today).

# 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