| /* |
| * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.jdi; |
| |
| import com.sun.jdi.ClassNotPreparedException; |
| import com.sun.jdi.InconsistentDebugInfoException; |
| import com.sun.jdi.ObjectCollectedException; |
| import com.sun.jdi.VMDisconnectedException; |
| import com.sun.jdi.VMOutOfMemoryException; |
| import com.sun.jdi.VirtualMachine; |
| import com.sun.jdi.event.ClassPrepareEvent; |
| import com.sun.jdi.event.ClassUnloadEvent; |
| import com.sun.jdi.event.Event; |
| import com.sun.jdi.event.EventIterator; |
| import com.sun.jdi.event.EventSet; |
| |
| public class InternalEventHandler implements Runnable |
| { |
| EventQueueImpl queue; |
| VirtualMachineImpl vm; |
| |
| InternalEventHandler(VirtualMachineImpl vm, EventQueueImpl queue) { |
| this.vm = vm; |
| this.queue = queue; |
| Thread thread = new Thread(vm.threadGroupForJDI(), this, |
| "JDI Internal Event Handler"); |
| thread.setDaemon(true); |
| thread.start(); |
| } |
| |
| public void run() { |
| if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) { |
| vm.printTrace("Internal event handler running"); |
| } |
| try { |
| while (true) { |
| try { |
| EventSet eventSet = queue.removeInternal(); |
| EventIterator it = eventSet.eventIterator(); |
| while (it.hasNext()) { |
| Event event = it.nextEvent(); |
| if (event instanceof ClassUnloadEvent) { |
| ClassUnloadEvent cuEvent = (ClassUnloadEvent)event; |
| vm.removeReferenceType(cuEvent.classSignature()); |
| |
| if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) { |
| vm.printTrace("Handled Unload Event for " + |
| cuEvent.classSignature()); |
| } |
| } else if (event instanceof ClassPrepareEvent) { |
| ClassPrepareEvent cpEvent = (ClassPrepareEvent)event; |
| ((ReferenceTypeImpl)cpEvent.referenceType()) |
| .markPrepared(); |
| |
| if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) { |
| vm.printTrace("Handled Prepare Event for " + |
| cpEvent.referenceType().name()); |
| } |
| } |
| } |
| |
| /* |
| * Handle exceptions that can occur in normal operation |
| * but which can't be accounted for by event builder |
| * methods. The thread should not be terminated if they |
| * occur. |
| * |
| * TO DO: We need a better way to log these conditions. |
| */ |
| } catch (VMOutOfMemoryException vmme) { |
| vmme.printStackTrace(); |
| } catch (InconsistentDebugInfoException idie) { |
| idie.printStackTrace(); |
| |
| /* |
| * If any of these exceptions below occurs, there is some |
| * sort of programming error that should be addressed in |
| * the JDI implemementation. However, it would cripple |
| * the implementation if we let this thread die due to |
| * one of them. So, a notification of the exception is |
| * given and we attempt to continue. |
| */ |
| } catch (ObjectCollectedException oce) { |
| oce.printStackTrace(); |
| } catch (ClassNotPreparedException cnpe) { |
| cnpe.printStackTrace(); |
| } |
| } |
| } catch (InterruptedException e) { // should we really die here |
| } catch (VMDisconnectedException e) { // time to die |
| } |
| if ((vm.traceFlags & VirtualMachine.TRACE_EVENTS) != 0) { |
| vm.printTrace("Internal event handler exiting"); |
| } |
| } |
| } |