1 files changed, 38 insertions, 0 deletions
diff --git a/compiler-rt/test/tsan/fork_deadlock.cpp b/compiler-rt/test/tsan/fork_deadlock.cpp
new file mode 100644
index 00000000000..32006e2ae53
--- /dev/null
+++ b/compiler-rt/test/tsan/fork_deadlock.cpp
@@ -0,0 +1,38 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %env_tsan_opts=atexit_sleep_ms=50 %run %t 2>&1 | FileCheck %s
+#include "test.h"
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int counter;
+
+static void *incrementer(void *p) {
+  for (;;)
+    __sync_fetch_and_add(&counter, 1);
+  return 0;
+}
+
+int main() {
+  barrier_init(&barrier, 2);
+  pthread_t th1;
+  pthread_create(&th1, 0, incrementer, 0);
+  for (int i = 0; i < 10; i++) {
+    switch (fork()) {
+    default:  // parent
+      while (wait(0) < 0) {}
+      fprintf(stderr, ".");
+      break;
+    case 0:  // child
+      __sync_fetch_and_add(&counter, 1);
+      exit(0);
+      break;
+    case -1:  // error
+      fprintf(stderr, "failed to fork (%d)\n", errno);
+      exit(1);
+    }
+  }
+  fprintf(stderr, "OK\n");
+}
+
+// CHECK: OK
+