ignore futex notify if no successful futex wait was performed in the same location...

diff --git a/futex.cc b/futex.cc
index 0647337bc725b61d0110953e8670bc01784b6a7f..11685d3826e0c117d724cb60e877f1925402f530 100644 (file)
--- a/futex.cc
+++ b/futex.cc
@@ -61,6 +61,10 @@ namespace std _GLIBCXX_VISIBILITY(default)
                // INT_MAX wakes all the waiters at the address __addr
                ModelExecution *execution = model->get_execution();
                cdsc::condition_variable *v = execution->getCondMap()->get( (pthread_cond_t *) __addr);
+
+               if (v == NULL)
+                       return;         // do nothing
+
                v->notify_all();
        }