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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 | } | ||