test/jdk/com/sun/jdi/BreakpointTest.java
author erikj
Tue, 12 Sep 2017 19:03:39 +0200
changeset 47216 71c04702a3d5
parent 44529 jdk/test/com/sun/jdi/BreakpointTest.java@c1e6dd7a7326
permissions -rw-r--r--
8187443: Forest Consolidation: Move files to unified layout Reviewed-by: darcy, ihse
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/*
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 * Copyright (c) 2001, 2017, 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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//    THIS TEST IS LINE NUMBER SENSITIVE
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/**
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 * @test
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 * @bug 6496524
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 * @key intermittent
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 * @summary Setting breakpoint in jdb crashes Hotspot JVM
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 * @author jjh
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 *
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 * @run build TestScaffold VMConnection TargetListener TargetAdapter
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 * @run compile -g BreakpointTest.java
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 * @run driver BreakpointTest
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 */
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import com.sun.jdi.*;
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import com.sun.jdi.event.*;
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import com.sun.jdi.request.*;
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import java.util.*;
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// The debuggee just runs in a loop. The debugger
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// sets a bkpt on the Math.random call.  When the
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// bkpt is hit, the debugger disables it, resumes
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// the debuggee, waits a bit, and enables the bkpt again.
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class BreakpointTarg {
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    public final static int BKPT_LINE = 56;
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    public static long count;
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    static void doit() {
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        Object[] roots = new Object[200000];
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        while (true) {
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            int index = (int) (Math.random() * roots.length); // BKPT_LINE
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            // This println makes the test pass
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            //System.out.println("Debuggee: index = " + index);
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            roots[index] = new Object();   // bkpt here passes
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                                           // and null instead of new Object()
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                                           // passes
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            count++;
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        }
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    }
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    public static void main(String[] args) {
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        doit();
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    }
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}
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    /********** test program **********/
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public class BreakpointTest extends TestScaffold {
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    ClassType targetClass;
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    ThreadReference mainThread;
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    BreakpointTest (String args[]) {
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        super(args);
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    }
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    public static void main(String[] args)      throws Exception {
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        new BreakpointTest(args).startTests();
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    }
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    /********** event handlers **********/
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    static int maxBkpts = 50;
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    int bkptCount;
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    BreakpointRequest bkptRequest;
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    Field debuggeeCountField;
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    // When we get a bkpt we want to disable the request,
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    // resume the debuggee, and then re-enable the request
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    public void breakpointReached(BreakpointEvent event) {
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        System.out.println("Got BreakpointEvent: " + bkptCount +
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                           ", debuggeeCount = " +
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                           ((LongValue)targetClass.
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                            getValue(debuggeeCountField)).value()
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                           );
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        bkptRequest.disable();
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    }
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    public void eventSetComplete(EventSet set) {
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        set.resume();
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        // The main thread watchs the bkptCount to
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        // see if bkpts stop coming in.  The
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        // test _should_ fail well before maxBkpts bkpts.
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        if (bkptCount++ < maxBkpts) {
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            try {
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                Thread.sleep(100);
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            } catch (InterruptedException ee) {
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            }
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            bkptRequest.enable();
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        }
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    }
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    public void vmDisconnected(VMDisconnectEvent event) {
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        println("Got VMDisconnectEvent");
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    }
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    /********** test core **********/
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    protected void runTests() throws Exception {
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        /*
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         * Get to the top of main()
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         * to determine targetClass and mainThread
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         */
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        BreakpointEvent bpe = startToMain("BreakpointTarg");
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        targetClass = (ClassType)bpe.location().declaringType();
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        mainThread = bpe.thread();
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        EventRequestManager erm = vm().eventRequestManager();
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        Location loc1 = findLocation(
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                            targetClass,
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                            BreakpointTarg.BKPT_LINE);
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        bkptRequest = erm.createBreakpointRequest(loc1);
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        bkptRequest.enable();
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        debuggeeCountField = targetClass.fieldByName("count");
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        try {
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            addListener (this);
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        } catch (Exception ex){
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            ex.printStackTrace();
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            failure("failure: Could not add listener");
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            throw new Exception("BreakpointTest: failed");
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        }
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        int prevBkptCount;
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        vm().resume();
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        while (!vmDisconnected && bkptCount < maxBkpts) {
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            try {
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                Thread.sleep(5000);
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            } catch (InterruptedException ee) {
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            }
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        }
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        println("done with loop, final count = " +
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                    ((LongValue)targetClass.
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                     getValue(debuggeeCountField)).value());
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        bkptRequest.disable();
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        removeListener(this);
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        /*
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         * deal with results of test
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         * if anything has called failure("foo") testFailed will be true
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         */
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        if (!testFailed) {
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            println("BreakpointTest: passed");
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        } else {
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            throw new Exception("BreakpointTest: failed");
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        }
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    }
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}