[Python-checkins] cpython (3.2): Fixes issue #9535: Fix pending signals that have been received but not
gregory.p.smith
python-checkins at python.org
Sun Nov 11 05:34:50 CET 2012
http://hg.python.org/cpython/rev/ba45976c2801
changeset: 80358:ba45976c2801
branch: 3.2
parent: 80354:a1db815d0829
user: Gregory P. Smith <greg at krypto.org>
date: Sat Nov 10 20:33:07 2012 -0800
summary:
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.
files:
Misc/NEWS | 3 +++
Modules/signalmodule.c | 16 ++++++++++++++++
2 files changed, 19 insertions(+), 0 deletions(-)
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -10,6 +10,9 @@
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
Stinner.
diff --git a/Modules/signalmodule.c b/Modules/signalmodule.c
--- a/Modules/signalmodule.c
+++ b/Modules/signalmodule.c
@@ -987,9 +987,25 @@
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
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
/* PyThread_ReInitTLS() must be called early, to make sure that the TLS API
* can be called safely. */
--
Repository URL: http://hg.python.org/cpython
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