diff -r c63bdf53a1a7 -r 44839fbb20db test/hotspot/jtreg/vmTestbase/nsk/share/aod/AgentsAttacher.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/share/aod/AgentsAttacher.java	Mon Apr 30 18:10:24 2018 -0700
@@ -0,0 +1,137 @@
+/*
+ * Copyright (c) 2008, 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.
+ */
+package nsk.share.aod;
+
+import nsk.share.*;
+import java.io.IOException;
+import java.util.*;
+import com.sun.tools.attach.*;
+
+/*
+ * This class loads java and native agents in the running VM using Attach API
+ * (API from package com.sun.tools.attach).
+ */
+public class AgentsAttacher {
+
+    protected String targetVMId;
+
+    protected List<AgentInformation> agents;
+
+    protected Log log;
+
+    public AgentsAttacher(String targetVMId, List<AgentInformation> agents, Log log) {
+        this.targetVMId = targetVMId;
+        this.agents = agents;
+        this.log = log;
+    }
+
+    public void attachAgents() {
+        VirtualMachine vm = null;
+
+        try {
+            log.display("Trying to get VirtualMachine object");
+            vm = VirtualMachine.attach(targetVMId);
+        } catch (AttachNotSupportedException e) {
+            log.complain("Unexpected AttachNotSupportedException during VirtualMachine.attach: " + e);
+            e.printStackTrace(log.getOutStream());
+        } catch (IOException e) {
+            log.complain("Unexpected IOException during VirtualMachine.attach: " + e);
+            e.printStackTrace(log.getOutStream());
+        }
+
+        if (vm == null) {
+            failed("Unable to create VirtualMachine object");
+        }
+
+        log.display("VirtualMachine was created: " + vm);
+
+        try {
+            for (AgentInformation agentInfo : agents) {
+                tryToLoadAgent(vm, agentInfo.pathToAgent, agentInfo.agentOptions, agentInfo.jarAgent);
+            }
+        } finally {
+            try {
+                log.display("Detaching from the VM '" + vm + "'");
+                vm.detach();
+            } catch (IOException e) {
+                failed("Unexpected IOException during detaching: " + e, e);
+            }
+        }
+    }
+
+    protected void tryToLoadAgent(VirtualMachine vm, String agent, String agentOptions, boolean jarAgent) {
+        boolean agentLoaded = false;
+
+        Throwable failureCause = null;
+
+        try {
+            if (jarAgent) {
+                log.display("Trying to load jar agent: '" + agent + "' (agent options: '" + agentOptions + "')");
+                vm.loadAgent(agent, agentOptions);
+            } else {
+                log.display("Trying to load native agent: '" + agent + "' (agent options: '" + agentOptions + "')");
+                vm.loadAgentLibrary(agent, agentOptions);
+            }
+            log.display("Agent was loaded");
+            agentLoaded = true;
+        } catch (AgentLoadException e) {
+            failureCause = e;
+            log.complain("Unexpected AgentLoadException during agent loading: " + e);
+            if (jarAgent) {
+                log.complain("(probably the agent does not exist, or cannot be started in the manner specified in "
+                        + "the java.lang.instrument specification)");
+            } else {
+                log.complain("(probably agent library does not exist, or cannot be loaded for another reason)");
+            }
+            e.printStackTrace(log.getOutStream());
+        } catch (AgentInitializationException e) {
+            failureCause = e;
+            log.complain("Unexpected AgentInitializationException during agent loading: " + e);
+            if (jarAgent) {
+                log.complain("(agentmain have thrown an exception)");
+            } else {
+                log.complain("Agent_OnAttach function returned an error: " + e.returnValue());
+            }
+            e.printStackTrace(log.getOutStream());
+        } catch (IOException e) {
+            failureCause = e;
+            log.complain("Unexpected IOException during agent loading: " + e);
+            e.printStackTrace(log.getOutStream());
+        }
+
+        if (!agentLoaded) {
+            if (failureCause != null)
+                failed("Couldn't attach agent to the target application", failureCause);
+            else
+                failed("Couldn't attach agent to the target application");
+        }
+    }
+
+    private void failed(String errorMessage) {
+        throw new Failure(errorMessage);
+    }
+
+    private void failed(String errorMessage, Throwable t) {
+        throw new Failure(errorMessage, t);
+    }
+}