Showing the changes to java/pkg/sun/tracing/dtrace/DTraceProbe.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,82 @@ | ||
| 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 | + | |