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annotate contrib/showstack.py @ 40788:41f0529b5112 stable

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commandserver: get around ETIMEDOUT raised by selectors2 selector.select() should exits with an empty event list on timed out, but selectors2 raises OSError if timeout expires while recovering from EINTR. Spotted while debugging new chg feature.
author Yuya Nishihara <yuya@tcha.org>
date Mon, 03 Dec 2018 21:45:15 +0900
parents acf5dbe39478
children 6dae1f31c6c9
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1 # showstack.py - extension to dump a Python stack trace on signal
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2 #
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3 # binds to both SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)
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4 """dump stack trace when receiving SIGQUIT (Ctrl-\) and SIGINFO (Ctrl-T on BSDs)
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5 """
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6
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7 from __future__ import absolute_import, print_function
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8 import signal
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9 import sys
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10 import traceback
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11
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12 def sigshow(*args):
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13 sys.stderr.write("\n")
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14 traceback.print_stack(args[1], limit=10, file=sys.stderr)
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15 sys.stderr.write("----\n")
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16
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17 def sigexit(*args):
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18 sigshow(*args)
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19 print('alarm!')
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20 sys.exit(1)
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21
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22 def extsetup(ui):
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23 signal.signal(signal.SIGQUIT, sigshow)
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24 signal.signal(signal.SIGALRM, sigexit)
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25 try:
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26 signal.signal(signal.SIGINFO, sigshow)
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27 except AttributeError:
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28 pass