1 files changed, 28 insertions, 0 deletions
diff --git a/compiler-rt/test/tsan/java_race.cpp b/compiler-rt/test/tsan/java_race.cpp
new file mode 100644
index 00000000000..140a2a3c19d
--- /dev/null
+++ b/compiler-rt/test/tsan/java_race.cpp
@@ -0,0 +1,28 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
+#include "java.h"
+
+void *Thread(void *p) {
+  barrier_wait(&barrier);
+  *(int*)p = 42;
+  return 0;
+}
+
+int main() {
+  barrier_init(&barrier, 2);
+  int const kHeapSize = 1024 * 1024;
+  jptr jheap = (jptr)malloc(kHeapSize + 8) + 8;
+  __tsan_java_init(jheap, kHeapSize);
+  const int kBlockSize = 16;
+  __tsan_java_alloc(jheap, kBlockSize);
+  pthread_t th;
+  pthread_create(&th, 0, Thread, (void*)jheap);
+  *(int*)jheap = 43;
+  barrier_wait(&barrier);
+  pthread_join(th, 0);
+  __tsan_java_free(jheap, kBlockSize);
+  fprintf(stderr, "DONE\n");
+  return __tsan_java_fini();
+}
+
+// CHECK: WARNING: ThreadSanitizer: data race
+// CHECK: DONE