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