1 files changed, 45 insertions, 0 deletions
diff --git a/compiler-rt/test/tsan/mutexset3.cpp b/compiler-rt/test/tsan/mutexset3.cpp
new file mode 100644
index 00000000000..6e5d9cce2aa
--- /dev/null
+++ b/compiler-rt/test/tsan/mutexset3.cpp
@@ -0,0 +1,45 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
+#include "test.h"
+
+int Global;
+pthread_mutex_t mtx1;
+pthread_mutex_t mtx2;
+
+void *Thread1(void *x) {
+  barrier_wait(&barrier);
+  pthread_mutex_lock(&mtx1);
+  pthread_mutex_lock(&mtx2);
+  Global++;
+  pthread_mutex_unlock(&mtx2);
+  pthread_mutex_unlock(&mtx1);
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  Global--;
+  barrier_wait(&barrier);
+  return NULL;
+}
+
+int main() {
+  barrier_init(&barrier, 2);
+  // CHECK: WARNING: ThreadSanitizer: data race
+  // CHECK: Write of size 4 at {{.*}} by thread T1
+  // CHECK:               (mutexes: write [[M1:M[0-9]+]], write [[M2:M[0-9]+]]):
+  // CHECK:   Previous write of size 4 at {{.*}} by thread T2:
+  // CHECK:   Mutex [[M1]] (0x{{.*}}) created at:
+  // CHECK:     #0 pthread_mutex_init
+  // CHECK:     #1 main {{.*}}mutexset3.cpp:[[@LINE+4]]
+  // CHECK:   Mutex [[M2]] (0x{{.*}}) created at:
+  // CHECK:     #0 pthread_mutex_init
+  // CHECK:     #1 main {{.*}}mutexset3.cpp:[[@LINE+2]]
+  pthread_mutex_init(&mtx1, 0);
+  pthread_mutex_init(&mtx2, 0);
+  pthread_t t[2];
+  pthread_create(&t[0], NULL, Thread1, NULL);
+  pthread_create(&t[1], NULL, Thread2, NULL);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  pthread_mutex_destroy(&mtx1);
+  pthread_mutex_destroy(&mtx2);
+}