--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/compiler-rt/test/tsan/fork_atexit.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,37 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %env_tsan_opts=atexit_sleep_ms=50 %run %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+void foo() {
+  fprintf(stderr, "CHILD ATEXIT\n");
+}
+
+void *worker(void *unused) {
+  return 0;
+}
+
+int main() {
+  pthread_t t;
+  pthread_create(&t, NULL, worker, NULL);
+  int pid = fork();
+  if (pid == 0) {
+    // child
+    atexit(foo);
+    fprintf(stderr, "CHILD DONE\n");
+  } else {
+    pthread_join(t, 0);
+    if (waitpid(pid, 0, 0) == -1) {
+      perror("waitpid");
+      exit(1);
+    }
+    fprintf(stderr, "PARENT DONE\n");
+  }
+}
+
+// CHECK: CHILD DONE
+// CHECK: CHILD ATEXIT
+// CHECK: PARENT DONE