Showing the changes to java/pkg/sun/tracing/dtrace/DTraceProbe.java (1 of 18352 files). Show all
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| 1 | /* | ||
| 2 | * Copyright (c) 2008, 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 sun.tracing.dtrace; | ||
| 27 | |||
| 28 | import java.lang.reflect.Method; | ||
| 29 | import java.lang.reflect.InvocationTargetException; | ||
| 30 | |||
| 31 | import sun.tracing.ProbeSkeleton; | ||
| 32 | |||
| 33 | class DTraceProbe extends ProbeSkeleton { | ||
| 34 | private Object proxy; | ||
| 35 | private Method declared_method; | ||
| 36 | private Method implementing_method; | ||
| 37 | |||
| 38 | DTraceProbe(Object proxy, Method m) { | ||
| 39 | super(m.getParameterTypes()); | ||
| 40 | this.proxy = proxy; | ||
| 41 | this.declared_method = m; | ||
| 42 | try { | ||
| 43 | // The JVM will override the proxy method's implementation with | ||
| 44 | // a version that will invoke the probe. | ||
| 45 | this.implementing_method = proxy.getClass().getMethod( | ||
| 46 | m.getName(), m.getParameterTypes()); | ||
| 47 | } catch (NoSuchMethodException e) { | ||
| 48 | throw new RuntimeException("Internal error, wrong proxy class"); | ||
| 49 | } | ||
| 50 | } | ||
| 51 | |||
| 52 | public boolean isEnabled() { | ||
| 53 | return JVM.isEnabled(implementing_method); | ||
| 54 | } | ||
| 55 | |||
| 56 | public void uncheckedTrigger(Object[] args) { | ||
| 57 | try { | ||
| 58 | implementing_method.invoke(proxy, args); | ||
| 59 | } catch (IllegalAccessException e) { | ||
| 60 | assert false; | ||
| 61 | } catch (InvocationTargetException e) { | ||
| 62 | assert false; | ||
| 63 | } | ||
| 64 | } | ||
| 65 | |||
| 66 | String getProbeName() { | ||
| 67 | return DTraceProvider.getProbeName(declared_method); | ||
| 68 | } | ||
| 69 | |||
| 70 | String getFunctionName() { | ||
| 71 | return DTraceProvider.getFunctionName(declared_method); | ||
| 72 | } | ||
| 73 | |||
| 74 | Method getMethod() { | ||
| 75 | return implementing_method; | ||
| 76 | } | ||
| 77 | |||
| 78 | Class<?>[] getParameterTypes() { | ||
| 79 | return this.parameters; | ||
| 80 | } | ||
| 81 | } | ||
| 82 | |||