J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2002 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.example.debug.bdi; |
| 27 | |
| 28 | import com.sun.jdi.*; |
| 29 | import java.util.List; |
| 30 | import java.util.ArrayList; |
| 31 | import java.util.Iterator; |
| 32 | |
| 33 | //### Should handle target VM death or connection failure cleanly. |
| 34 | |
| 35 | public class ThreadInfo { |
| 36 | |
| 37 | private ThreadReference thread; |
| 38 | private int status; |
| 39 | |
| 40 | private int frameCount; |
| 41 | |
| 42 | Object userObject; // User-supplied annotation. |
| 43 | |
| 44 | private boolean interrupted = false; |
| 45 | |
| 46 | private void assureInterrupted() throws VMNotInterruptedException { |
| 47 | if (!interrupted) { |
| 48 | throw new VMNotInterruptedException(); |
| 49 | } |
| 50 | } |
| 51 | |
| 52 | ThreadInfo (ThreadReference thread) { |
| 53 | this.thread = thread; |
| 54 | this.frameCount = -1; |
| 55 | } |
| 56 | |
| 57 | public ThreadReference thread() { |
| 58 | return thread; |
| 59 | } |
| 60 | |
| 61 | public int getStatus() throws VMNotInterruptedException { |
| 62 | assureInterrupted(); |
| 63 | update(); |
| 64 | return status; |
| 65 | } |
| 66 | |
| 67 | public int getFrameCount() throws VMNotInterruptedException { |
| 68 | assureInterrupted(); |
| 69 | update(); |
| 70 | return frameCount; |
| 71 | } |
| 72 | |
| 73 | public StackFrame getFrame(int index) throws VMNotInterruptedException { |
| 74 | assureInterrupted(); |
| 75 | update(); |
| 76 | try { |
| 77 | return thread.frame(index); |
| 78 | } catch (IncompatibleThreadStateException e) { |
| 79 | // Should not happen |
| 80 | interrupted = false; |
| 81 | throw new VMNotInterruptedException(); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | public Object getUserObject() { |
| 86 | return userObject; |
| 87 | } |
| 88 | |
| 89 | public void setUserObject(Object obj) { |
| 90 | userObject = obj; |
| 91 | } |
| 92 | |
| 93 | // Refresh upon first access after cache is cleared. |
| 94 | |
| 95 | void update() throws VMNotInterruptedException { |
| 96 | if (frameCount == -1) { |
| 97 | try { |
| 98 | status = thread.status(); |
| 99 | frameCount = thread.frameCount(); |
| 100 | } catch (IncompatibleThreadStateException e) { |
| 101 | // Should not happen |
| 102 | interrupted = false; |
| 103 | throw new VMNotInterruptedException(); |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | // Called from 'ExecutionManager'. |
| 109 | |
| 110 | void validate() { |
| 111 | interrupted = true; |
| 112 | } |
| 113 | |
| 114 | void invalidate() { |
| 115 | interrupted = false; |
| 116 | frameCount = -1; |
| 117 | status = ThreadReference.THREAD_STATUS_UNKNOWN; |
| 118 | } |
| 119 | |
| 120 | } |