Antoine Pitrou <pit...@free.fr> added the comment:
Right, but it seems that even if sigaddset() allowed you to "set" signals 32
and 33, that would be ignored by pthread_sigmask().
This is what I get here (Ubuntu 16.04, glibc 2.23):
>>> signal.pthread_sigmask(signal.SIG_BLOCK, range(1, 65))
set()
>>> signal.pthread_sigmask(signal.SIG_BLOCK, range(1, 65))
{<Signals.SIGHUP: 1>, <Signals.SIGINT: 2>, <Signals.SIGQUIT: 3>,
<Signals.SIGILL: 4>, <Signals.SIGTRAP: 5>, <Signals.SIGABRT: 6>,
<Signals.SIGBUS: 7>, <Signals.SIGFPE: 8>, <Signals.SIGUSR1: 10>,
<Signals.SIGSEGV: 11>, <Signals.SIGUSR2: 12>, <Signals.SIGPIPE: 13>,
<Signals.SIGALRM: 14>, <Signals.SIGTERM: 15>, 16, <Signals.SIGCHLD: 17>,
<Signals.SIGCONT: 18>, <Signals.SIGTSTP: 20>, <Signals.SIGTTIN: 21>,
<Signals.SIGTTOU: 22>, <Signals.SIGURG: 23>, <Signals.SIGXCPU: 24>,
<Signals.SIGXFSZ: 25>, <Signals.SIGVTALRM: 26>, <Signals.SIGPROF: 27>,
<Signals.SIGWINCH: 28>, <Signals.SIGIO: 29>, <Signals.SIGPWR: 30>,
<Signals.SIGSYS: 31>, <Signals.SIGRTMIN: 34>, 35, 36, 37, 38, 39, 40, 41, 42,
43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62,
63, <Signals.SIGRTMAX: 64>}
----------
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<https://bugs.python.org/issue33329>
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