--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/jvmti/GetTopThreadGroups/topthrgrp001/topthrgrp001.cpp	Tue Aug 28 14:37:34 2018 -0700
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2003, 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 <stdio.h>
+#include <string.h>
+#include "jvmti.h"
+#include "agent_common.h"
+#include "JVMTITools.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef JNI_ENV_ARG
+
+#ifdef __cplusplus
+#define JNI_ENV_ARG(x, y) y
+#define JNI_ENV_PTR(x) x
+#else
+#define JNI_ENV_ARG(x,y) x, y
+#define JNI_ENV_PTR(x) (*x)
+#endif
+
+#endif
+
+#define PASSED 0
+#define STATUS_FAILED 2
+
+static jvmtiEnv *jvmti = NULL;
+static jint result = PASSED;
+static jboolean printdump = JNI_FALSE;
+
+#ifdef STATIC_BUILD
+JNIEXPORT jint JNICALL Agent_OnLoad_topthrgrp001(JavaVM *jvm, char *options, void *reserved) {
+    return Agent_Initialize(jvm, options, reserved);
+}
+JNIEXPORT jint JNICALL Agent_OnAttach_topthrgrp001(JavaVM *jvm, char *options, void *reserved) {
+    return Agent_Initialize(jvm, options, reserved);
+}
+JNIEXPORT jint JNI_OnLoad_topthrgrp001(JavaVM *jvm, char *options, void *reserved) {
+    return JNI_VERSION_1_8;
+}
+#endif
+jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
+    jint res;
+
+    if (options != NULL && strcmp(options, "printdump") == 0) {
+        printdump = JNI_TRUE;
+    }
+
+    res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),
+        JVMTI_VERSION_1_1);
+    if (res != JNI_OK || jvmti == NULL) {
+        printf("Wrong result of a valid call to GetEnv!\n");
+        return JNI_ERR;
+    }
+
+    return JNI_OK;
+}
+
+JNIEXPORT jint JNICALL
+Java_nsk_jvmti_GetTopThreadGroups_topthrgrp001_check(JNIEnv *env, jclass cls) {
+    jvmtiError err;
+    jint i, groupCount = 0;
+    jthreadGroup *groups = NULL;
+    jvmtiThreadGroupInfo inf;
+
+    if (jvmti == NULL) {
+        printf("JVMTI client was not properly loaded!\n");
+        return STATUS_FAILED;
+    }
+
+    if (printdump == JNI_TRUE) {
+        printf(">>> getting top thread groups list ...\n");
+    }
+    err = jvmti->GetTopThreadGroups(&groupCount, &groups);
+    if (err != JVMTI_ERROR_NONE) {
+        printf("(GetTopThreadGroups) unexpected error: %s (%d)\n",
+               TranslateError(err), err);
+        result = STATUS_FAILED;
+    }
+
+    if (printdump == JNI_TRUE) {
+        printf(">>> getting info about groups ...\n");
+    }
+    for (i = 0; i < groupCount; i++) {
+        err = jvmti->GetThreadGroupInfo(groups[i], &inf);
+        if (err != JVMTI_ERROR_NONE) {
+            printf("(GetThreadGroupInfo#%d) unexpected error: %s (%d)\n",
+                   i, TranslateError(err), err);
+            result = STATUS_FAILED;
+        } else {
+            if (printdump == JNI_TRUE) {
+                printf(">>> group %d ----------------\n", i);
+                printf(">>>           name: %s\n", inf.name);
+                printf(">>>         parent: 0x%p\n", inf.parent);
+                printf(">>>   max priority: %d\n", inf.max_priority);
+                printf(">>>      is daemon: %s\n",
+                       (inf.is_daemon==JNI_TRUE) ? "true" : "false");
+            }
+            if (inf.parent != NULL) {
+                printf("ERROR: thread group is not parentless!\n");
+                printf("   group name: %s\n", inf.name);
+                printf("       parent: 0x%p\n", inf.parent);
+                result = STATUS_FAILED;
+            }
+        }
+    }
+
+    if (printdump == JNI_TRUE) {
+        printf(">>> done ...\n");
+    }
+
+    return result;
+}
+
+#ifdef __cplusplus
+}
+#endif