1 files changed, 47 insertions, 0 deletions
diff --git a/compiler-rt/lib/tsan/lit_tests/race_on_heap.cc b/compiler-rt/lib/tsan/lit_tests/race_on_heap.cc
new file mode 100644
index 00000000000..1fdf54d84c6
--- /dev/null
+++ b/compiler-rt/lib/tsan/lit_tests/race_on_heap.cc
@@ -0,0 +1,47 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+void *Thread1(void *p) {
+  *(int*)p = 42;
+  return 0;
+}
+
+void *Thread2(void *p) {
+  *(int*)p = 44;
+  return 0;
+}
+
+void *alloc() {
+  return malloc(99);
+}
+
+void *AllocThread(void* arg) {
+  return alloc();
+}
+
+int main() {
+  void *p = 0;
+  pthread_t t[2];
+  pthread_create(&t[0], 0, AllocThread, 0);
+  pthread_join(t[0], &p);
+  fprintf(stderr, "addr=%p\n", p);
+  pthread_create(&t[0], 0, Thread1, (char*)p + 16);
+  pthread_create(&t[1], 0, Thread2, (char*)p + 16);
+  pthread_join(t[0], 0);
+  pthread_join(t[1], 0);
+  return 0;
+}
+
+// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
+// CHECK: WARNING: ThreadSanitizer: data race
+// ...
+// CHECK:   Location is heap block of size 99 at [[ADDR]] allocated by thread 1:
+// CHCEKL     #0 malloc
+// CHECK:     #1 alloc
+// CHECK:     #2 AllocThread
+// ...
+// CHECK:   Thread 1 (finished) created at:
+// CHECK:     #0 pthread_create
+// CHECK:     #1 main