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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2008, 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.jdi; | |
| 27 | + | |
| 28 | +import com.sun.jdi.*; | |
| 29 | +import java.util.*; | |
| 30 | + | |
| 31 | +public class ThreadGroupReferenceImpl extends ObjectReferenceImpl | |
| 32 | + implements ThreadGroupReference, VMListener | |
| 33 | +{ | |
| 34 | + // Cached components that cannot change | |
| 35 | + String name; | |
| 36 | + ThreadGroupReference parent; | |
| 37 | + boolean triedParent; | |
| 38 | + | |
| 39 | + // This is cached only while the VM is suspended | |
| 40 | + private static class Cache extends ObjectReferenceImpl.Cache { | |
| 41 | + JDWP.ThreadGroupReference.Children kids = null; | |
| 42 | + } | |
| 43 | + | |
| 44 | + protected ObjectReferenceImpl.Cache newCache() { | |
| 45 | + return new Cache(); | |
| 46 | + } | |
| 47 | + | |
| 48 | + ThreadGroupReferenceImpl(VirtualMachine aVm,long aRef) { | |
| 49 | + super(aVm,aRef); | |
| 50 | + vm.state().addListener(this); | |
| 51 | + } | |
| 52 | + | |
| 53 | + protected String description() { | |
| 54 | + return "ThreadGroupReference " + uniqueID(); | |
| 55 | + } | |
| 56 | + | |
| 57 | + public String name() { | |
| 58 | + if (name == null) { | |
| 59 | + // Does not need synchronization, since worst-case | |
| 60 | + // static info is fetched twice (Thread group name | |
| 61 | + // cannot change) | |
| 62 | + try { | |
| 63 | + name = JDWP.ThreadGroupReference.Name. | |
| 64 | + process(vm, this).groupName; | |
| 65 | + } catch (JDWPException exc) { | |
| 66 | + throw exc.toJDIException(); | |
| 67 | + } | |
| 68 | + } | |
| 69 | + return name; | |
| 70 | + } | |
| 71 | + | |
| 72 | + public ThreadGroupReference parent() { | |
| 73 | + if (!triedParent) { | |
| 74 | + // Does not need synchronization, since worst-case | |
| 75 | + // static info is fetched twice (Thread group parent cannot | |
| 76 | + // change) | |
| 77 | + try { | |
| 78 | + parent = JDWP.ThreadGroupReference.Parent. | |
| 79 | + process(vm, this).parentGroup; | |
| 80 | + triedParent = true; | |
| 81 | + } catch (JDWPException exc) { | |
| 82 | + throw exc.toJDIException(); | |
| 83 | + } | |
| 84 | + } | |
| 85 | + return parent; | |
| 86 | + } | |
| 87 | + | |
| 88 | + public void suspend() { | |
| 89 | + for (ThreadReference thread : threads()) { | |
| 90 | + thread.suspend(); | |
| 91 | + } | |
| 92 | + | |
| 93 | + for (ThreadGroupReference threadGroup : threadGroups()) { | |
| 94 | + threadGroup.suspend(); | |
| 95 | + } | |
| 96 | + } | |
| 97 | + | |
| 98 | + public void resume() { | |
| 99 | + for (ThreadReference thread : threads()) { | |
| 100 | + thread.resume(); | |
| 101 | + } | |
| 102 | + | |
| 103 | + for (ThreadGroupReference threadGroup : threadGroups()) { | |
| 104 | + threadGroup.resume(); | |
| 105 | + } | |
| 106 | + } | |
| 107 | + | |
| 108 | + private JDWP.ThreadGroupReference.Children kids() { | |
| 109 | + JDWP.ThreadGroupReference.Children kids = null; | |
| 110 | + try { | |
| 111 | + Cache local = (Cache)getCache(); | |
| 112 | + | |
| 113 | + if (local != null) { | |
| 114 | + kids = local.kids; | |
| 115 | + } | |
| 116 | + if (kids == null) { | |
| 117 | + kids = JDWP.ThreadGroupReference.Children | |
| 118 | + .process(vm, this); | |
| 119 | + if (local != null) { | |
| 120 | + local.kids = kids; | |
| 121 | + if ((vm.traceFlags & vm.TRACE_OBJREFS) != 0) { | |
| 122 | + vm.printTrace(description() + | |
| 123 | + " temporarily caching children "); | |
| 124 | + } | |
| 125 | + } | |
| 126 | + } | |
| 127 | + } catch (JDWPException exc) { | |
| 128 | + throw exc.toJDIException(); | |
| 129 | + } | |
| 130 | + return kids; | |
| 131 | + } | |
| 132 | + | |
| 133 | + public List<ThreadReference> threads() { | |
| 134 | + return Arrays.asList((ThreadReference[])kids().childThreads); | |
| 135 | + } | |
| 136 | + | |
| 137 | + public List<ThreadGroupReference> threadGroups() { | |
| 138 | + return Arrays.asList((ThreadGroupReference[])kids().childGroups); | |
| 139 | + } | |
| 140 | + | |
| 141 | + public String toString() { | |
| 142 | + return "instance of " + referenceType().name() + | |
| 143 | + "(name='" + name() + "', " + "id=" + uniqueID() + ")"; | |
| 144 | + } | |
| 145 | + | |
| 146 | + byte typeValueKey() { | |
| 147 | + return JDWP.Tag.THREAD_GROUP; | |
| 148 | + } | |
| 149 | +} | |