fix benign data race in pthread_attr_init

access to defaults should be protected against concurrent changes.

diff --git a/src/thread/pthread_attr_init.c b/src/thread/pthread_attr_init.c
index a962b46..398990d 100644 (file)
--- a/src/thread/pthread_attr_init.c
+++ b/src/thread/pthread_attr_init.c
@@ -6,7 +6,9 @@ extern size_t __default_guardsize;
 int pthread_attr_init(pthread_attr_t *a)
 {
        *a = (pthread_attr_t){0};
+       __acquire_ptc();
        a->_a_stacksize = __default_stacksize;
        a->_a_guardsize = __default_guardsize;
+       __release_ptc();
        return 0;
 }