Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/compiler-rt/test/tsan/static_init2.cc

@@ -0,0 +1,33 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+struct Cache {
+  int x;
+  explicit Cache(int x)
+    : x(x) {
+  }
+};
+
+void foo(Cache *my) {
+  static Cache *c = my ? my : new Cache(rand());
+  if (c->x >= RAND_MAX)
+    exit(1);
+}
+
+void *Thread(void *x) {
+  foo(new Cache(rand()));
+  return 0;
+}
+
+int main() {
+  pthread_t t[2];
+  pthread_create(&t[0], 0, Thread, 0);
+  pthread_create(&t[1], 0, Thread, 0);
+  pthread_join(t[0], 0);
+  pthread_join(t[1], 0);
+  fprintf(stderr, "PASS\n");
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer: data race