view contrib/showstack.py @ 39625:c06c585f166b

cext: stop preprocessing a partial function call

MSVC++ 14 yelled:

    mercurial/cext/revlog.c(1913): fatal error C1057: unexpected end of file in
                                   macro expansion

At this point, the C extensions build (with warnings), and it dies in win32.py
because the `_fields_` strings in the ctypes classes are being converted to
bytes by the source translator.

# 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