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 
  30 /**
  31  * Container class for JVM interface native methods
  32  *
  33  * @since 1.7
  34  */
  35 class JVM {
  36 
  37     static {
  38         java.security.AccessController.doPrivileged(
  39             new java.security.PrivilegedAction<Void>() {
  40                 public Void run() {
  41                     System.loadLibrary("jsdt");
  42                     return null;
  43                 }
  44             });
  45     }
  46 
  47     static long activate(String moduleName, DTraceProvider[] providers) {
  48         return activate0(moduleName, providers);
  49     }
  50 
  51     static void dispose(long handle) {
  52         dispose0(handle);
  53     }
  54 
  55     static boolean isEnabled(Method m) {
  56         return isEnabled0(m);
  57     }
  58 
  59     static boolean isSupported() {
  60         return isSupported0();
  61     }
  62 
  63     static Class<?> defineClass(
  64             ClassLoader loader, String name, byte[] b, int off, int len) {
  65         return defineClass0(loader, name, b, off, len);
  66     }
  67 
  68     private static native long activate0(
  69         String moduleName, DTraceProvider[] providers);
  70     private static native void dispose0(long activation_handle);
  71     private static native boolean isEnabled0(Method m);
  72     private static native boolean isSupported0();
  73     private static native Class<?> defineClass0(
  74         ClassLoader loader, String name, byte[] b, int off, int len);
  75 }