tsan: check stack in atexit4.cpp test

Reviewed By: vitalybuka, melver

Differential Revision: https://reviews.llvm.org/D114604

GitOrigin-RevId: c2f0de06c9595f34afec7905bae41d08cb46f150
diff --git a/test/tsan/atexit4.cpp b/test/tsan/atexit4.cpp
index 893f7b4..325f24b 100644
--- a/test/tsan/atexit4.cpp
+++ b/test/tsan/atexit4.cpp
@@ -27,3 +27,8 @@
 
 // CHECK: DONE
 // CHECK: WARNING: ThreadSanitizer: data race
+// CHECK:   Write of size 4
+// CHECK:     #0 thread
+// CHECK:   Previous write of size 4
+// CHECK:     #0 race
+// CHECK:     #1 at_exit_wrapper