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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 | } | ||