Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

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

@@ -0,0 +1,23 @@
+// RUN: %clang_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <setjmp.h>
+
+int foo(jmp_buf env) {
+  longjmp(env, 42);
+}
+
+int main() {
+  jmp_buf env;
+  if (setjmp(env) == 42) {
+    fprintf(stderr, "JUMPED\n");
+    return 0;
+  }
+  foo(env);
+  fprintf(stderr, "FAILED\n");
+  return 0;
+}
+
+// CHECK-NOT: FAILED
+// CHECK: JUMPED