1 /* |
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2 * Copyright (c) 2008, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.tracing.dtrace; |
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27 |
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28 import java.lang.reflect.Method; |
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29 import java.lang.reflect.InvocationTargetException; |
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30 |
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31 import sun.tracing.ProbeSkeleton; |
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32 |
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33 class DTraceProbe extends ProbeSkeleton { |
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34 private Object proxy; |
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35 private Method declared_method; |
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36 private Method implementing_method; |
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37 |
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38 DTraceProbe(Object proxy, Method m) { |
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39 super(m.getParameterTypes()); |
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40 this.proxy = proxy; |
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41 this.declared_method = m; |
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42 try { |
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43 // The JVM will override the proxy method's implementation with |
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44 // a version that will invoke the probe. |
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45 this.implementing_method = proxy.getClass().getMethod( |
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46 m.getName(), m.getParameterTypes()); |
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47 } catch (NoSuchMethodException e) { |
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48 throw new RuntimeException("Internal error, wrong proxy class"); |
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49 } |
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50 } |
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51 |
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52 public boolean isEnabled() { |
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53 return JVM.isEnabled(implementing_method); |
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54 } |
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55 |
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56 public void uncheckedTrigger(Object[] args) { |
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57 try { |
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58 implementing_method.invoke(proxy, args); |
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59 } catch (IllegalAccessException e) { |
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60 assert false; |
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61 } catch (InvocationTargetException e) { |
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62 assert false; |
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63 } |
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64 } |
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65 |
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66 String getProbeName() { |
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67 return DTraceProvider.getProbeName(declared_method); |
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68 } |
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69 |
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70 String getFunctionName() { |
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71 return DTraceProvider.getFunctionName(declared_method); |
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72 } |
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73 |
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74 Method getMethod() { |
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75 return implementing_method; |
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76 } |
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77 |
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78 Class<?>[] getParameterTypes() { |
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79 return this.parameters; |
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80 } |
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81 } |
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82 |
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