83 lines
2.7 KiB
Java
83 lines
2.7 KiB
Java
/*
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* Copyright (c) 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 sun.tracing.dtrace;
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import java.lang.reflect.Method;
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import java.lang.reflect.InvocationTargetException;
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import sun.tracing.ProbeSkeleton;
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class DTraceProbe extends ProbeSkeleton {
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private Object proxy;
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private Method declared_method;
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private Method implementing_method;
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DTraceProbe(Object proxy, Method m) {
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super(m.getParameterTypes());
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this.proxy = proxy;
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this.declared_method = m;
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try {
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// The JVM will override the proxy method's implementation with
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// a version that will invoke the probe.
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this.implementing_method = proxy.getClass().getMethod(
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m.getName(), m.getParameterTypes());
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} catch (NoSuchMethodException e) {
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throw new RuntimeException("Internal error, wrong proxy class");
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}
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}
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public boolean isEnabled() {
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return JVM.isEnabled(implementing_method);
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}
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public void uncheckedTrigger(Object[] args) {
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try {
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implementing_method.invoke(proxy, args);
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} catch (IllegalAccessException e) {
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assert false;
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} catch (InvocationTargetException e) {
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assert false;
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}
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}
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String getProbeName() {
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return DTraceProvider.getProbeName(declared_method);
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}
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String getFunctionName() {
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return DTraceProvider.getFunctionName(declared_method);
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}
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Method getMethod() {
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return implementing_method;
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}
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Class<?>[] getParameterTypes() {
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return this.parameters;
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}
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}
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