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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2002, Oracle and/or its affiliates. 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. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.tools.example.debug.bdi; | |
| 27 | + | |
| 28 | +import com.sun.jdi.*; | |
| 29 | + | |
| 30 | +//### Should handle target VM death or connection failure cleanly. | |
| 31 | + | |
| 32 | +public class ThreadInfo { | |
| 33 | + | |
| 34 | + private ThreadReference thread; | |
| 35 | + private int status; | |
| 36 | + | |
| 37 | + private int frameCount; | |
| 38 | + | |
| 39 | + Object userObject; // User-supplied annotation. | |
| 40 | + | |
| 41 | + private boolean interrupted = false; | |
| 42 | + | |
| 43 | + private void assureInterrupted() throws VMNotInterruptedException { | |
| 44 | + if (!interrupted) { | |
| 45 | + throw new VMNotInterruptedException(); | |
| 46 | + } | |
| 47 | + } | |
| 48 | + | |
| 49 | + ThreadInfo (ThreadReference thread) { | |
| 50 | + this.thread = thread; | |
| 51 | + this.frameCount = -1; | |
| 52 | + } | |
| 53 | + | |
| 54 | + public ThreadReference thread() { | |
| 55 | + return thread; | |
| 56 | + } | |
| 57 | + | |
| 58 | + public int getStatus() throws VMNotInterruptedException { | |
| 59 | + assureInterrupted(); | |
| 60 | + update(); | |
| 61 | + return status; | |
| 62 | + } | |
| 63 | + | |
| 64 | + public int getFrameCount() throws VMNotInterruptedException { | |
| 65 | + assureInterrupted(); | |
| 66 | + update(); | |
| 67 | + return frameCount; | |
| 68 | + } | |
| 69 | + | |
| 70 | + public StackFrame getFrame(int index) throws VMNotInterruptedException { | |
| 71 | + assureInterrupted(); | |
| 72 | + update(); | |
| 73 | + try { | |
| 74 | + return thread.frame(index); | |
| 75 | + } catch (IncompatibleThreadStateException e) { | |
| 76 | + // Should not happen | |
| 77 | + interrupted = false; | |
| 78 | + throw new VMNotInterruptedException(); | |
| 79 | + } | |
| 80 | + } | |
| 81 | + | |
| 82 | + public Object getUserObject() { | |
| 83 | + return userObject; | |
| 84 | + } | |
| 85 | + | |
| 86 | + public void setUserObject(Object obj) { | |
| 87 | + userObject = obj; | |
| 88 | + } | |
| 89 | + | |
| 90 | + // Refresh upon first access after cache is cleared. | |
| 91 | + | |
| 92 | + void update() throws VMNotInterruptedException { | |
| 93 | + if (frameCount == -1) { | |
| 94 | + try { | |
| 95 | + status = thread.status(); | |
| 96 | + frameCount = thread.frameCount(); | |
| 97 | + } catch (IncompatibleThreadStateException e) { | |
| 98 | + // Should not happen | |
| 99 | + interrupted = false; | |
| 100 | + throw new VMNotInterruptedException(); | |
| 101 | + } | |
| 102 | + } | |
| 103 | + } | |
| 104 | + | |
| 105 | + // Called from 'ExecutionManager'. | |
| 106 | + | |
| 107 | + void validate() { | |
| 108 | + interrupted = true; | |
| 109 | + } | |
| 110 | + | |
| 111 | + void invalidate() { | |
| 112 | + interrupted = false; | |
| 113 | + frameCount = -1; | |
| 114 | + status = ThreadReference.THREAD_STATUS_UNKNOWN; | |
| 115 | + } | |
| 116 | + | |
| 117 | +} | |