--- a/compiler-rt/test/tsan/signal_sync2.cpp	Tue Jun 15 19:13:43 2021 +0900
+++ b/compiler-rt/test/tsan/signal_sync2.cpp	Tue Jun 15 19:15:29 2021 +0900
@@ -1,19 +1,13 @@
 // RUN: %clangxx_tsan -O1 %s -o %t && %run %t 2>&1 | FileCheck %s
 // UNSUPPORTED: darwin
-#include <pthread.h>
-#include <stdio.h>
-#include <stdlib.h>
+#include "test.h"
+#include <errno.h>
 #include <signal.h>
+#include <sys/time.h>
 #include <sys/types.h>
-#include <sys/time.h>
-#include <unistd.h>
-#include <errno.h>
 
 // Test synchronization in signal handled within IgnoreSync region.
 
-extern "C" void AnnotateIgnoreSyncBegin(const char *f, int l);
-extern "C" void AnnotateIgnoreSyncEnd(const char *f, int l);
-
 const int kSignalCount = 500;
 
 __thread int process_signals;