tsan: add another test for setuid



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@236130 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/tsan/setuid2.c b/test/tsan/setuid2.c
new file mode 100644
index 0000000..67a6fd1
--- /dev/null
+++ b/test/tsan/setuid2.c
@@ -0,0 +1,21 @@
+// RUN: %clang_tsan -O1 %s -o %t && TSAN_OPTIONS="flush_memory_ms=1 memory_limit_mb=1" %run %t 2>&1 | FileCheck %s
+#include "test.h"
+#include <sys/types.h>
+#include <unistd.h>
+#include <time.h>
+
+// Test that setuid call works in presence of stoptheworld.
+
+int main() {
+  struct timespec tp0, tp1;
+  clock_gettime(CLOCK_MONOTONIC, &tp0);
+  clock_gettime(CLOCK_MONOTONIC, &tp1);
+  while (tp1.tv_sec - tp0.tv_sec < 3) {
+    clock_gettime(CLOCK_MONOTONIC, &tp1);
+    setuid(0);
+  }
+  fprintf(stderr, "DONE\n");
+  return 0;
+}
+
+// CHECK: DONE