diff -r a2f1923b3e16 -r e409244ce72e test/hotspot/jtreg/vmTestbase/nsk/share/gc/lock/jni/FloatArrayCriticalLocker.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/share/gc/lock/jni/FloatArrayCriticalLocker.cpp	Tue Aug 28 14:37:34 2018 -0700
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2007, 2018, 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 <jni.h>
+#include <stdio.h>
+#include <time.h>
+#include "jni_tools.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static jfieldID objFieldId = NULL;
+
+/*
+ * Class:     nsk_share_gc_lock_jni_FloatArrayCriticalLocker
+ * Method:    criticalNative
+ * Signature: ([Z)Z
+ */
+JNIEXPORT jfloat JNICALL Java_nsk_share_gc_lock_jni_FloatArrayCriticalLocker_criticalNative
+(JNIEnv *env, jobject o, jlong enterTime, jlong sleepTime) {
+        jsize size, i;
+        jfloatArray arr;
+        jfloat *pa;
+        jfloat hash = 0;
+        time_t start_time, current_time;
+
+        if (objFieldId == NULL) {
+                jclass klass = env->GetObjectClass(o);
+                if (klass == NULL) {
+                        printf("Error: GetObjectClass returned NULL\n");
+                        return 0;
+                }
+                objFieldId = env->GetFieldID(klass, "obj", "Ljava/lang/Object;");
+                if (objFieldId == NULL) {
+                        printf("Error: GetFieldID returned NULL\n");
+                        return 0;
+                }
+        }
+        arr = (jfloatArray) env->GetObjectField(o, objFieldId);
+        if (arr == NULL) {
+                printf("Error: GetObjectField returned NULL\n");
+                return JNI_FALSE;
+        }
+        env->SetObjectField(o, objFieldId, NULL);
+        size = env->GetArrayLength(arr);
+        start_time = time(NULL);
+        enterTime /= 1000;
+        current_time = 0;
+        while (current_time - start_time < enterTime) {
+                pa = (jfloat*) env->GetPrimitiveArrayCritical(arr, NULL);
+                if (pa != NULL) {
+                        for (i = 0; i < size; ++i)
+                                hash += pa[i];
+                } else {
+                        hash = 0;
+                }
+                mssleep((long) sleepTime);
+                env->ReleasePrimitiveArrayCritical(arr, pa, 0);
+                mssleep((long) sleepTime);
+                current_time = time(NULL);
+        }
+        env->SetObjectField(o, objFieldId, arr);
+        return hash;
+}
+
+#ifdef __cplusplus
+}
+#endif