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| 1 | +/* | |
| 2 | + * Copyright (c) 1998, 2001, 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 com.sun.jdi.event.*; | |
| 30 | +import java.util.*; | |
| 31 | + | |
| 32 | +public class InternalEventHandler implements Runnable | |
| 33 | +{ | |
| 34 | + EventQueueImpl queue; | |
| 35 | + VirtualMachineImpl vm; | |
| 36 | + | |
| 37 | + InternalEventHandler(VirtualMachineImpl vm, EventQueueImpl queue) | |
| 38 | + { | |
| 39 | + this.vm = vm; | |
| 40 | + this.queue = queue; | |
| 41 | + Thread thread = new Thread(vm.threadGroupForJDI(), this, | |
| 42 | + "JDI Internal Event Handler"); | |
| 43 | + thread.setDaemon(true); | |
| 44 | + thread.start(); | |
| 45 | + } | |
| 46 | + | |
| 47 | + public void run() { | |
| 48 | + if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) { | |
| 49 | + vm.printTrace("Internal event handler running"); | |
| 50 | + } | |
| 51 | + try { | |
| 52 | + while (true) { | |
| 53 | + try { | |
| 54 | + EventSet eventSet = queue.removeInternal(); | |
| 55 | + EventIterator it = eventSet.eventIterator(); | |
| 56 | + while (it.hasNext()) { | |
| 57 | + Event event = it.nextEvent(); | |
| 58 | + if (event instanceof ClassUnloadEvent) { | |
| 59 | + ClassUnloadEvent cuEvent = (ClassUnloadEvent)event; | |
| 60 | + vm.removeReferenceType(cuEvent.classSignature()); | |
| 61 | + | |
| 62 | + if ((vm.traceFlags & vm.TRACE_EVENTS) != 0) { | |
| 63 | + vm.printTrace("Handled Unload Event for " + | |
| 64 | + cuEvent.classSignature()); | |
| 65 | + } | |
| 66 | + } else if (event instanceof ClassPrepareEvent) { | |
| 67 | + ClassPrepareEvent cpEvent = (ClassPrepareEvent)event; | |
| 68 | + ((ReferenceTypeImpl)cpEvent.referenceType()) | |
| 69 | + .markPrepared(); | |
| 70 | + | |
| 71 | + if ((vm.traceFlags & vm.TRACE_EVENTS) != 0) { | |
| 72 | + vm.printTrace("Handled Prepare Event for " + | |
| 73 | + cpEvent.referenceType().name()); | |
| 74 | + } | |
| 75 | + } | |
| 76 | + | |
| 77 | + } | |
| 78 | + | |
| 79 | + /* | |
| 80 | + * Handle exceptions that can occur in normal operation | |
| 81 | + * but which can't be accounted for by event builder | |
| 82 | + * methods. The thread should not be terminated if they | |
| 83 | + * occur. | |
| 84 | + * | |
| 85 | + * TO DO: We need a better way to log these conditions. | |
| 86 | + */ | |
| 87 | + } catch (VMOutOfMemoryException vmme) { | |
| 88 | + vmme.printStackTrace(); | |
| 89 | + } catch (InconsistentDebugInfoException idie) { | |
| 90 | + idie.printStackTrace(); | |
| 91 | + | |
| 92 | + /* | |
| 93 | + * If any of these exceptions below occurs, there is some | |
| 94 | + * sort of programming error that should be addressed in | |
| 95 | + * the JDI implemementation. However, it would cripple | |
| 96 | + * the implementation if we let this thread die due to | |
| 97 | + * one of them. So, a notification of the exception is | |
| 98 | + * given and we attempt to continue. | |
| 99 | + */ | |
| 100 | + } catch (ObjectCollectedException oce) { | |
| 101 | + oce.printStackTrace(); | |
| 102 | + } catch (ClassNotPreparedException cnpe) { | |
| 103 | + cnpe.printStackTrace(); | |
| 104 | + } | |
| 105 | + } | |
| 106 | + } catch (InterruptedException e) { // should we really die here | |
| 107 | + } catch (VMDisconnectedException e) { // time to die | |
| 108 | + } | |
| 109 | + if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) { | |
| 110 | + vm.printTrace("Internal event handler exiting"); | |
| 111 | + } | |
| 112 | + } | |
| 113 | +} | |