90 lines
2.8 KiB
Java
90 lines
2.8 KiB
Java
/*
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* Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.jdi;
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import com.sun.jdi.*;
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public class MonitorInfoImpl extends MirrorImpl
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implements MonitorInfo, ThreadListener {
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/* Once false, monitorInfo should not be used.
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* access synchronized on (vm.state())
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*/
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private boolean isValid = true;
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ObjectReference monitor;
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ThreadReference thread;
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int stack_depth;
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MonitorInfoImpl(VirtualMachine vm, ObjectReference mon,
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ThreadReferenceImpl thread, int dpth) {
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super(vm);
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this.monitor = mon;
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this.thread = thread;
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this.stack_depth = dpth;
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thread.addListener(this);
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}
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/*
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* ThreadListener implementation
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* Must be synchronized since we must protect against
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* sending defunct (isValid == false) stack ids to the back-end.
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*/
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public boolean threadResumable(ThreadAction action) {
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synchronized (vm.state()) {
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if (isValid) {
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isValid = false;
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return false; /* remove this stack frame as a listener */
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} else {
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throw new InternalException(
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"Invalid stack frame thread listener");
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}
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}
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}
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private void validateMonitorInfo() {
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if (!isValid) {
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throw new InvalidStackFrameException("Thread has been resumed");
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}
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}
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public ObjectReference monitor() {
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validateMonitorInfo();
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return monitor;
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}
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public int stackDepth() {
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validateMonitorInfo();
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return stack_depth;
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}
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public ThreadReference thread() {
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validateMonitorInfo();
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return thread;
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}
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}
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