J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2001 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any 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 | } |