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Fixes issue #9535: Fix pending signals that have been received but not 

yet handled by Python to not persist after os.fork() in the child process.
This commit is contained in:
Gregory P. Smith 2012-11-10 20:33:39 -08:00
parent ec6dfcffa0 9463e3ac8b
commit 34b14951ee
2 changed files with 19 additions and 0 deletions
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3
Misc/NEWS
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@ -12,6 +12,9 @@ What's New in Python 3.3.1?
Core and Builtins Core and Builtins
----------------- -----------------
- Issue #9535: Fix pending signals that have been received but not yet
handled by Python to not persist after os.fork() in the child process.
- Issue #15001: fix segfault on "del sys.module['__main__']". Patch by Victor - Issue #15001: fix segfault on "del sys.module['__main__']". Patch by Victor
Stinner. Stinner.

16
Modules/signalmodule.c
View File

@ -1394,9 +1394,25 @@ PyOS_InterruptOccurred(void)
return 0; return 0;
} }
static void
_clear_pending_signals(void)
{
int i;
if (!is_tripped)
return;
is_tripped = 0;
for (i = 1; i < NSIG; ++i) {
Handlers[i].tripped = 0;
}
}
void void
PyOS_AfterFork(void) PyOS_AfterFork(void)
{ {
/* Clear the signal flags after forking so that they aren't handled
* in both processes if they came in just before the fork() but before
* the interpreter had an opportunity to call the handlers. issue9535. */
_clear_pending_signals();
#ifdef WITH_THREAD #ifdef WITH_THREAD
/* PyThread_ReInitTLS() must be called early, to make sure that the TLS API /* PyThread_ReInitTLS() must be called early, to make sure that the TLS API
* can be called safely. */ * can be called safely. */