tsan: even if races between atomic and plain memory accesses are turned off (report_atomic_races=0),

still report races between atomic accesses and free().

llvm-svn: 174175

1 files changed, 19 insertions, 0 deletions

diff --git a/compiler-rt/lib/tsan/lit_tests/atomic_free.cc b/compiler-rt/lib/tsan/lit_tests/atomic_free.cc
new file mode 100644
index 00000000000..ba9bd5ac4ae
--- /dev/null
+++ b/compiler-rt/lib/tsan/lit_tests/atomic_free.cc
@@ -0,0 +1,19 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <unistd.h>
+
+void *Thread(void *a) {
+  __atomic_fetch_add((int*)a, 1, __ATOMIC_SEQ_CST);
+  return 0;
+}
+
+int main() {
+  int *a = new int(0);
+  pthread_t t;
+  pthread_create(&t, 0, Thread, a);
+  sleep(1);
+  delete a;
+  pthread_join(t, 0);
+}
+
+// CHECK: WARNING: ThreadSanitizer: data race