--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/jvmti/AttachOnDemand/attach041/attach041Agent00.cpp	Tue Aug 28 14:37:34 2018 -0700
@@ -0,0 +1,195 @@
+/*
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <jni.h>
+#include <jvmti.h>
+#include <aod.h>
+#include <jvmti_aod.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Expected agent work scenario:
+ *  - during initialization agent enables ThreadStart events
+ *  - target application starts thread
+ *  - agent receives ThreadStart event and tries to find thread provoked this event
+ *    in all VM thread groups and finishes work
+ */
+
+#define STARTED_TEST_THREAD_NAME "attach041-TestThread"
+
+static Options* options = NULL;
+static const char* agentName;
+
+int tryFindThread(jvmtiEnv *jvmti, jthreadGroup group, const char* threadNameToFind) {
+    jint threadsCount = 0;
+    jthread *threads = NULL;
+    jint groupsCount = 0;
+    jthreadGroup* groups = NULL;
+    jvmtiThreadGroupInfo groupInfo;
+    int i;
+    char threadGroupName[MAX_STRING_LENGTH];
+
+    if(!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetThreadGroupInfo, jvmti, group, &groupInfo))) {
+        return 0;
+    }
+
+    strcpy(threadGroupName, groupInfo.name);
+    nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)groupInfo.name);
+
+    NSK_DISPLAY3("%s: trying to find thread '%s' in group '%s'\n", agentName, threadNameToFind, threadGroupName);
+
+    if(!NSK_JVMTI_VERIFY(NSK_CPP_STUB6(GetThreadGroupChildren, jvmti, group, &threadsCount, &threads, &groupsCount, &groups))) {
+        return 0;
+    }
+
+    for (i = 0; i < threadsCount; i++) {
+        char threadName[MAX_STRING_LENGTH];
+        if (!nsk_jvmti_aod_getThreadName(jvmti, threads[i], threadName)) {
+            NSK_COMPLAIN1("%s: failed to get thread name\n", agentName);
+            nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)threads);
+            return 0;
+        }
+        if (!strcmp(threadName, threadNameToFind)) {
+            nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)threads);
+            nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)groups);
+            NSK_DISPLAY3("%s: thread '%s' was found in group '%s'\n", agentName, threadNameToFind, threadGroupName);
+            return 1;
+        }
+    }
+
+    // threads array isn't needed more
+    nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)threads);
+
+    NSK_DISPLAY3("%s: thread '%s' wasn't found in group '%s'\n", agentName, threadNameToFind, threadGroupName);
+
+    if (groupsCount != 0) {
+        for (i = 0; i < groupsCount; i++) {
+            if (tryFindThread(jvmti, groups[i], threadNameToFind)) {
+                nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)groups);
+                return 1;
+            }
+        }
+    }
+
+    nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)groups);
+
+    return 0;
+}
+
+void JNICALL threadStartHandler(jvmtiEnv *jvmti,
+        JNIEnv* jni,
+        jthread thread) {
+    char startedThreadName[MAX_STRING_LENGTH];
+
+    if (!nsk_jvmti_aod_getThreadName(jvmti, thread, startedThreadName)) {
+        nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_THREAD_START, 0, jvmti, jni);
+        return;
+    }
+
+    NSK_DISPLAY2("%s: ThreadStart event was received for thread '%s'\n", agentName, startedThreadName);
+
+    if (!strcmp(startedThreadName, STARTED_TEST_THREAD_NAME)) {
+        int success = 1;
+        int threadWasFound = 0;
+        jint groupsCount = 0;
+        jthreadGroup *topGroups;
+        int i;
+
+        if(!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetTopThreadGroups, jvmti, &groupsCount, &topGroups))) {
+            NSK_COMPLAIN1("%s: failed to get top thread groups\n", agentName);
+            nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_THREAD_START, 0, jvmti, jni);
+            return;
+        }
+
+        for (i = 0; i < groupsCount; i++) {
+            if (tryFindThread(jvmti, topGroups[i], startedThreadName)) {
+                threadWasFound = 1;
+                break;
+            }
+        }
+
+        nsk_jvmti_aod_deallocate(jvmti, (unsigned char*)topGroups);
+
+        if (!threadWasFound) {
+            success = 0;
+            NSK_COMPLAIN2("%s: failed to find thread '%s'\n", agentName, startedThreadName);
+        }
+
+        nsk_jvmti_aod_disableEventAndFinish(agentName, JVMTI_EVENT_THREAD_START, success, jvmti, jni);
+    }
+}
+
+#ifdef STATIC_BUILD
+JNIEXPORT jint JNI_OnLoad_attach041Agent00(JavaVM *jvm, char *options, void *reserved) {
+    return JNI_VERSION_1_8;
+}
+#endif
+
+JNIEXPORT jint JNICALL
+#ifdef STATIC_BUILD
+Agent_OnAttach_attach041Agent00(JavaVM *vm, char *optionsString, void *reserved)
+#else
+Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved)
+#endif
+{
+    jvmtiEventCallbacks eventCallbacks;
+    jvmtiEnv* jvmti;
+    JNIEnv* jni;
+
+    if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL))
+        return JNI_ERR;
+
+    agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION);
+
+    if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL)
+        return JNI_ERR;
+
+    if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL))
+        return JNI_ERR;
+
+    memset(&eventCallbacks,0, sizeof(eventCallbacks));
+    eventCallbacks.ThreadStart = threadStartHandler;
+    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks, jvmti, &eventCallbacks, sizeof(eventCallbacks))) ) {
+        return JNI_ERR;
+    }
+
+    if (!(nsk_jvmti_aod_enableEvent(jvmti, JVMTI_EVENT_THREAD_START))) {
+        return JNI_ERR;
+    }
+
+    NSK_DISPLAY1("%s: initialization was done\n", agentName);
+
+    if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName)))
+        return JNI_ERR;
+
+    return JNI_OK;
+}
+
+#ifdef __cplusplus
+}
+#endif