1 files changed, 25 insertions, 0 deletions
diff --git a/test/tsan/malloc_stack.cc b/test/tsan/malloc_stack.cc
new file mode 100644
index 000000000000..6027360754aa
--- /dev/null
+++ b/test/tsan/malloc_stack.cc
@@ -0,0 +1,25 @@
+// RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
+#include <pthread.h>
+#include <unistd.h>
+
+_Atomic(int*) p;
+
+void *thr(void *a) {
+  sleep(1);
+  int *pp = __c11_atomic_load(&p, __ATOMIC_RELAXED);
+  *pp = 42;
+  return 0;
+}
+
+int main() {
+  pthread_t th;
+  pthread_create(&th, 0, thr, p);
+  __c11_atomic_store(&p, new int, __ATOMIC_RELAXED);
+  pthread_join(th, 0);
+}
+
+// CHECK: data race
+// CHECK:   Previous write
+// CHECK:     #0 operator new
+// CHECK:   Location is heap block
+// CHECK:     #0 operator new