286 lines
10 KiB
Java
286 lines
10 KiB
Java
/*
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* Copyright (c) 2014 SAP SE. All rights reserved.
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* Copyright (c) 2023, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import com.sun.jdi.AbsentInformationException;
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import com.sun.jdi.Bootstrap;
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import com.sun.jdi.LocalVariable;
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import com.sun.jdi.Location;
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import com.sun.jdi.ObjectReference;
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import com.sun.jdi.ReferenceType;
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import com.sun.jdi.StackFrame;
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import com.sun.jdi.ThreadReference;
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import com.sun.jdi.Value;
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import com.sun.jdi.VirtualMachine;
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import com.sun.jdi.connect.Connector;
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import com.sun.jdi.connect.Connector.Argument;
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import com.sun.jdi.connect.IllegalConnectorArgumentsException;
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import com.sun.jdi.connect.LaunchingConnector;
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import com.sun.jdi.connect.VMStartException;
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import com.sun.jdi.event.BreakpointEvent;
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import com.sun.jdi.event.ClassPrepareEvent;
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import com.sun.jdi.event.Event;
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import com.sun.jdi.event.EventQueue;
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import com.sun.jdi.event.EventSet;
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import com.sun.jdi.event.VMDeathEvent;
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import com.sun.jdi.event.VMDisconnectEvent;
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import com.sun.jdi.event.VMStartEvent;
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import com.sun.jdi.request.BreakpointRequest;
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import com.sun.jdi.request.ClassPrepareRequest;
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import com.sun.jdi.request.EventRequestManager;
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import jdk.test.lib.Utils;
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/*
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* @test GetObjectLockCount.java
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* @bug 8036666
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* @summary verify jvm returns correct lock recursion count
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* @requires vm.jvmti
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* @library /test/lib
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* @run compile -g RecursiveObjectLock.java
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* @run main/othervm GetObjectLockCount
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* @author axel.siebenborn@sap.com
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*/
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public class GetObjectLockCount {
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public static final String CLASS_NAME = "RecursiveObjectLock";
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public static final String METHOD_NAME = "breakpoint1";
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/**
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* Find a com.sun.jdi.CommandLineLaunch connector
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*/
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static LaunchingConnector findLaunchingConnector() {
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List <Connector> connectors = Bootstrap.virtualMachineManager().allConnectors();
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Iterator <Connector> iter = connectors.iterator();
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while (iter.hasNext()) {
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Connector connector = iter.next();
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if (connector.name().equals("com.sun.jdi.CommandLineLaunch")) {
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return (LaunchingConnector)connector;
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}
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}
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throw new Error("No launching connector");
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}
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static VirtualMachine launchTarget(String mainArgs) {
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LaunchingConnector connector = findLaunchingConnector();
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Map<String, Argument> arguments = connectorArguments(connector, mainArgs);
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try {
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return (VirtualMachine) connector.launch(arguments);
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} catch (IOException exc) {
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throw new Error("Unable to launch target VM: " + exc);
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} catch (IllegalConnectorArgumentsException exc) {
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throw new Error("Internal error: " + exc);
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} catch (VMStartException exc) {
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throw new Error("Target VM failed to initialize: " +
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exc.getMessage());
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}
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}
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/**
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* Return the launching connector's arguments.
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*/
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static Map <String,Connector.Argument> connectorArguments(LaunchingConnector connector, String mainArgs) {
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Map<String,Connector.Argument> arguments = connector.defaultArguments();
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Connector.Argument mainArg = (Connector.Argument)arguments.get("main");
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if (mainArg == null) {
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throw new Error("Bad launching connector");
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}
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mainArg.setValue(mainArgs);
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Connector.Argument optionsArg = (Connector.Argument)arguments.get("options");
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if (optionsArg == null) {
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throw new Error("Bad launching connector");
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}
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optionsArg.setValue(String.join(" ", Utils.getTestJavaOpts()));
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return arguments;
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}
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private static void addClassWatch(VirtualMachine vm) {
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EventRequestManager erm = vm.eventRequestManager();
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ClassPrepareRequest classPrepareRequest = erm
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.createClassPrepareRequest();
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classPrepareRequest.addClassFilter(CLASS_NAME);
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classPrepareRequest.setEnabled(true);
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}
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private static void addBreakpoint(VirtualMachine vm, ReferenceType refType) {
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Location breakpointLocation = null;
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List<Location> locs;
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try {
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locs = refType.allLineLocations();
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for (Location loc: locs) {
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if (loc.method().name().equals(METHOD_NAME)) {
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breakpointLocation = loc;
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break;
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}
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}
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} catch (AbsentInformationException e) {
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// TODO Auto-generated catch block
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e.printStackTrace();
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}
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if (breakpointLocation != null) {
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EventRequestManager evtReqMgr = vm.eventRequestManager();
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BreakpointRequest bReq = evtReqMgr.createBreakpointRequest(breakpointLocation);
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bReq.setSuspendPolicy(BreakpointRequest.SUSPEND_ALL);
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bReq.enable();
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}
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}
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/**
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* @param args
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* @throws InterruptedException
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*/
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public static void main(String[] args) throws InterruptedException {
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VirtualMachine vm = launchTarget(CLASS_NAME);
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// process events
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EventQueue eventQueue = vm.eventQueue();
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// resume the vm
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boolean launched = false;
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while (!launched) {
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EventSet eventSet = eventQueue.remove();
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for (Event event : eventSet) {
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if (event instanceof VMStartEvent) {
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System.out.println("Vm launched");
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// set watch field on already loaded classes
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List<ReferenceType> referenceTypes = vm.classesByName(CLASS_NAME);
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for (ReferenceType refType : referenceTypes) {
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System.out.println("Found Class");
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addBreakpoint(vm, refType);
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}
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// watch for loaded classes
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addClassWatch(vm);
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vm.resume();
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launched = true;
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}
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}
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}
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Process process = vm.process();
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// Copy target's output and error to our output and error.
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Thread outThread = new StreamRedirectThread("out reader", process.getInputStream());
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Thread errThread = new StreamRedirectThread("error reader", process.getErrorStream());
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int recursionCount = -1;
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errThread.start();
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outThread.start();
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boolean connected = true;
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while (connected) {
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EventSet eventSet = eventQueue.remove();
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for (Event event : eventSet) {
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if (event instanceof VMDeathEvent || event instanceof VMDisconnectEvent) {
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// exit
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connected = false;
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}
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else if (event instanceof ClassPrepareEvent) {
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// watch field on loaded class
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System.out.println("ClassPrepareEvent");
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ClassPrepareEvent classPrepEvent = (ClassPrepareEvent) event;
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ReferenceType refType = classPrepEvent.referenceType();
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addBreakpoint(vm, refType);
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} else if (event instanceof BreakpointEvent) {
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recursionCount = getLockRecursions(vm);
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System.out.println("resume...");
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}
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}
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eventSet.resume();
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}
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// Shutdown begins when event thread terminates
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try {
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errThread.join(); // Make sure output is forwarded
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outThread.join();
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} catch (InterruptedException e) {
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// we don't interrupt
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e.printStackTrace();
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}
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if (recursionCount != 3) {
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throw new AssertionError("recursions: expected 3, but was " + recursionCount);
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}
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}
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public static int getLockRecursions(VirtualMachine vm) {
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List <ThreadReference> threads = vm.allThreads();
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for (ThreadReference thread : threads) {
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if (thread.name().equals("main")) {
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System.out.println("Found main thread.");
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try{
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StackFrame frame = thread.frame(3);
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return frame.thisObject().entryCount();
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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System.out.println("Main thread not found!");
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}
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return -1;
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}
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}
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class StreamRedirectThread extends Thread {
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private final BufferedReader in;
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private static final int BUFFER_SIZE = 2048;
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/**
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* Set up for copy.
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* @param name Name of the thread
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* @param in Stream to copy from
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*/
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StreamRedirectThread(String name, InputStream in) {
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super(name);
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this.in = new BufferedReader(new InputStreamReader(in));
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}
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/**
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* Copy.
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*/
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public void run() {
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try {
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String line;
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while ((line = in.readLine ()) != null) {
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System.out.println("testvm: " + line);
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}
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System.out.flush();
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} catch(IOException exc) {
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System.err.println("Child I/O Transfer - " + exc);
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exc.printStackTrace();
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}
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}
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}
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