Clear pending signals targeting exiting threadnewlib-snapshot-20151023

	* cygtls.cc (_cygtls::remove): Call remove_pending_sigs.
	* cygtls.h (_cygtls::remove_pending_sigs): Declare.
	* sigproc.cc (pending_signals::clear): Define new method taking a
	_cygtls pointer argument.  Drop pending signals for that thread.
	(_cygtls::remove_pending_sigs): Call pending_signals::clear for this
	thread.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

1 files changed, 19 insertions, 1 deletions

diff --git a/winsup/cygwin/sigproc.cc b/winsup/cygwin/sigproc.cc
index 9f261c9b3..387a71a69 100644
--- a/winsup/cygwin/sigproc.cc
+++ b/winsup/cygwin/sigproc.cc
@@ -79,7 +79,8 @@ public:
   void add (sigpacket&);
   bool pending () {retry = true; return !!start.next;}
   void clear (int sig) {sigs[sig].si.si_signo = 0;}
-  friend void __reg1 sig_dispatch_pending (bool);;
+  void clear (_cygtls *tls);
+  friend void __reg1 sig_dispatch_pending (bool);
   friend void WINAPI wait_sig (VOID *arg);
   friend void sigproc_init ();
 };
@@ -397,6 +398,23 @@ sig_clear (int sig)
   sigq.clear (sig);
 }
 
+/* Clear pending signals of specific thread.  Called from
+   _cygtls::remove_pending_sigs. */
+void
+pending_signals::clear (_cygtls *tls)
+{
+  for (int sig = 0; sig < NSIG + 1; ++sig)
+    if (sigs[sig].sigtls == tls)
+      clear (sig);
+}
+
+/* Clear pending signals of specific thread.  Called from _cygtls::remove */
+void
+_cygtls::remove_pending_sigs ()
+{
+  sigq.clear (this);
+}
+
 extern "C" int
 sigpending (sigset_t *mask)
 {