| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.tools.jdi; |
| 27 | |
| 28 | import com.sun.jdi.*; |
| 29 | |
| 30 | public class MonitorInfoImpl extends MirrorImpl |
| 31 | implements MonitorInfo, ThreadListener { |
| 32 | |
| 33 | /* Once false, monitorInfo should not be used. |
| 34 | * access synchronized on (vm.state()) |
| 35 | */ |
| 36 | private boolean isValid = true; |
| 37 | |
| 38 | ObjectReference monitor; |
| 39 | ThreadReference thread; |
| 40 | int stack_depth; |
| 41 | |
| 42 | MonitorInfoImpl(VirtualMachine vm, ObjectReference mon, |
| 43 | ThreadReference thread, int dpth) { |
| 44 | super(vm); |
| 45 | this.monitor = mon; |
| 46 | this.thread = thread; |
| 47 | this.stack_depth = dpth; |
| 48 | } |
| 49 | |
| 50 | |
| 51 | /* |
| 52 | * ThreadListener implementation |
| 53 | * Must be synchronized since we must protect against |
| 54 | * sending defunct (isValid == false) stack ids to the back-end. |
| 55 | */ |
| 56 | public boolean threadResumable(ThreadAction action) { |
| 57 | synchronized (vm.state()) { |
| 58 | if (isValid) { |
| 59 | isValid = false; |
| 60 | return false; /* remove this stack frame as a listener */ |
| 61 | } else { |
| 62 | throw new InternalException( |
| 63 | "Invalid stack frame thread listener"); |
| 64 | } |
| 65 | } |
| 66 | } |
| 67 | |
| 68 | private void validateMonitorInfo() { |
| 69 | if (!isValid) { |
| 70 | throw new InvalidStackFrameException("Thread has been resumed"); |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | public ObjectReference monitor() { |
| 75 | validateMonitorInfo(); |
| 76 | return monitor; |
| 77 | } |
| 78 | |
| 79 | public int stackDepth() { |
| 80 | validateMonitorInfo(); |
| 81 | return stack_depth; |
| 82 | } |
| 83 | |
| 84 | public ThreadReference thread() { |
| 85 | validateMonitorInfo(); |
| 86 | return thread; |
| 87 | } |
| 88 | } |