view contrib/showstack.py @ 35669:39499bc31fcd

formatting: enforce clang-format on all .cc files as well as .c files

As part of my upcoming fuzzer patch we're going to grow some .cc
files. They're not part of the release build (they're only used for
fuzzing, which requires clang 6 which in turn implies a working C++
compiler), so I'm not terribly worried about growing some C++ files.

Differential Revision: https://phab.mercurial-scm.org/D1874

# 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
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 extsetup(ui):
    signal.signal(signal.SIGQUIT, sigshow)
    try:
        signal.signal(signal.SIGINFO, sigshow)
    except AttributeError:
        pass