J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /** |
| 25 | * @test |
| 26 | * @bug 6496524 |
| 27 | * @summary Setting breakpoint in jdb crashes Hotspot JVM |
| 28 | * |
| 29 | * @author jjh |
| 30 | * |
| 31 | * @run build TestScaffold VMConnection TargetListener TargetAdapter |
| 32 | * @run compile -g BreakpointTest.java |
| 33 | * @run main BreakpointTest |
| 34 | */ |
| 35 | import com.sun.jdi.*; |
| 36 | import com.sun.jdi.event.*; |
| 37 | import com.sun.jdi.request.*; |
| 38 | |
| 39 | import java.util.*; |
| 40 | |
| 41 | // The debuggee just runs in a loop. The debugger |
| 42 | // sets a bkpt on the Math.random call. When the |
| 43 | // bkpt is hit, the debugger disables it, resumes |
| 44 | // the debuggee, waits a bit, and enables the bkpt again. |
| 45 | |
| 46 | class BreakpointTarg { |
| 47 | public final static int BKPT_LINE = 54; |
| 48 | // LINE NUMBER SENSITIVE |
| 49 | |
| 50 | public static long count; |
| 51 | static void doit() { |
| 52 | Object[] roots = new Object[200000]; |
| 53 | while (true) { |
| 54 | int index = (int) (Math.random() * roots.length); // BKPT_LINE |
| 55 | // This println makes the test pass |
| 56 | //System.out.println("Debuggee: index = " + index); |
| 57 | roots[index] = new Object(); // bkpt here passes |
| 58 | // and null instead of new Object() |
| 59 | // passes |
| 60 | count++; |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | public static void main(String[] args) { |
| 65 | doit(); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | /********** test program **********/ |
| 70 | |
| 71 | public class BreakpointTest extends TestScaffold { |
| 72 | ClassType targetClass; |
| 73 | ThreadReference mainThread; |
| 74 | |
| 75 | BreakpointTest (String args[]) { |
| 76 | super(args); |
| 77 | } |
| 78 | |
| 79 | public static void main(String[] args) throws Exception { |
| 80 | new BreakpointTest(args).startTests(); |
| 81 | } |
| 82 | |
| 83 | /********** event handlers **********/ |
| 84 | |
| 85 | static int maxBkpts = 50; |
| 86 | int bkptCount; |
| 87 | BreakpointRequest bkptRequest; |
| 88 | Field debuggeeCountField; |
| 89 | |
| 90 | // When we get a bkpt we want to disable the request, |
| 91 | // resume the debuggee, and then re-enable the request |
| 92 | public void breakpointReached(BreakpointEvent event) { |
| 93 | System.out.println("Got BreakpointEvent: " + bkptCount + |
| 94 | ", debuggeeCount = " + |
| 95 | ((LongValue)targetClass. |
| 96 | getValue(debuggeeCountField)).value() |
| 97 | ); |
| 98 | bkptRequest.disable(); |
| 99 | } |
| 100 | |
| 101 | public void eventSetComplete(EventSet set) { |
| 102 | set.resume(); |
| 103 | |
| 104 | // The main thread watchs the bkptCount to |
| 105 | // see if bkpts stop coming in. The |
| 106 | // test _should_ fail well before maxBkpts bkpts. |
| 107 | if (bkptCount++ < maxBkpts) { |
| 108 | try { |
| 109 | Thread.sleep(100); |
| 110 | } catch (InterruptedException ee) { |
| 111 | } |
| 112 | bkptRequest.enable(); |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | public void vmDisconnected(VMDisconnectEvent event) { |
| 117 | println("Got VMDisconnectEvent"); |
| 118 | } |
| 119 | |
| 120 | /********** test core **********/ |
| 121 | |
| 122 | protected void runTests() throws Exception { |
| 123 | /* |
| 124 | * Get to the top of main() |
| 125 | * to determine targetClass and mainThread |
| 126 | */ |
| 127 | BreakpointEvent bpe = startToMain("BreakpointTarg"); |
| 128 | targetClass = (ClassType)bpe.location().declaringType(); |
| 129 | mainThread = bpe.thread(); |
| 130 | EventRequestManager erm = vm().eventRequestManager(); |
| 131 | |
| 132 | Location loc1 = findLocation( |
| 133 | targetClass, |
| 134 | BreakpointTarg.BKPT_LINE); |
| 135 | |
| 136 | bkptRequest = erm.createBreakpointRequest(loc1); |
| 137 | bkptRequest.enable(); |
| 138 | debuggeeCountField = targetClass.fieldByName("count"); |
| 139 | try { |
| 140 | |
| 141 | addListener (this); |
| 142 | } catch (Exception ex){ |
| 143 | ex.printStackTrace(); |
| 144 | failure("failure: Could not add listener"); |
| 145 | throw new Exception("BreakpointTest: failed"); |
| 146 | } |
| 147 | |
| 148 | int prevBkptCount; |
| 149 | vm().resume(); |
| 150 | while (!vmDisconnected && bkptCount < maxBkpts) { |
| 151 | try { |
| 152 | Thread.sleep(5000); |
| 153 | } catch (InterruptedException ee) { |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | println("done with loop, final count = " + |
| 158 | ((LongValue)targetClass. |
| 159 | getValue(debuggeeCountField)).value()); |
| 160 | bkptRequest.disable(); |
| 161 | removeListener(this); |
| 162 | |
| 163 | |
| 164 | /* |
| 165 | * deal with results of test |
| 166 | * if anything has called failure("foo") testFailed will be true |
| 167 | */ |
| 168 | if (!testFailed) { |
| 169 | println("BreakpointTest: passed"); |
| 170 | } else { |
| 171 | throw new Exception("BreakpointTest: failed"); |
| 172 | } |
| 173 | } |
| 174 | } |