1 files changed, 37 insertions, 0 deletions
diff --git a/compiler-rt/test/tsan/fd_socketpair_norace.cpp b/compiler-rt/test/tsan/fd_socketpair_norace.cpp
new file mode 100644
index 00000000000..bee030dd324
--- /dev/null
+++ b/compiler-rt/test/tsan/fd_socketpair_norace.cpp
@@ -0,0 +1,37 @@
+// RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
+#include <pthread.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+int fds[2];
+int X;
+
+void *Thread1(void *x) {
+  X = 42;
+  write(fds[1], "a", 1);
+  close(fds[1]);
+  return NULL;
+}
+
+void *Thread2(void *x) {
+  char buf;
+  while (read(fds[0], &buf, 1) != 1) {
+  }
+  X = 43;
+  close(fds[0]);
+  return NULL;
+}
+
+int main() {
+  socketpair(AF_UNIX, SOCK_STREAM, 0, fds);
+  pthread_t t[2];
+  pthread_create(&t[0], NULL, Thread1, NULL);
+  pthread_create(&t[1], NULL, Thread2, NULL);
+  pthread_join(t[0], NULL);
+  pthread_join(t[1], NULL);
+  fprintf(stderr, "OK\n");
+}
+
+// CHECK-NOT: WARNING: ThreadSanitizer: data race