diff a/test/jdk/java/lang/ProcessBuilder/checkHandles/libCheckHandles.c b/test/jdk/java/lang/ProcessBuilder/checkHandles/libCheckHandles.c
--- /dev/null
+++ b/test/jdk/java/lang/ProcessBuilder/checkHandles/libCheckHandles.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef _WIN32
+
+#include "jni.h"
+#include "jni_util.h"
+#include <windows.h>
+
+JNIEXPORT jlong JNICALL Java_CheckHandles_getProcessHandleCount(JNIEnv *env)
+{
+    DWORD handleCount;
+    HANDLE handle = GetCurrentProcess();
+    if (GetProcessHandleCount(handle, &handleCount)) {
+        return (jlong)handleCount;
+    } else {
+        return -1L;
+    }
+}
+
+#endif  /*  _WIN32 */