view contrib/showstack.py @ 39422:adacefb0b7ea stable

dirstate: use tuple interface to fix leak in pack_dirstate()

Spotted by ASAN.

Unlike PyTuple_GET_ITEM(), PySequence_ITEM() returns a new reference. This
bug could be fixed by inserting Py_CLEAR() and Py_XDECREF() appropriately,
but I think requiring a tuple object is simpler and less error-prone.

The cext version is jumped to 10 since 6..9 are used in the default branch.
We'll need to bump it again at merge.

# 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