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 sun.security.action.LoadLibraryAction("jsdt"));
  40     }
  41 
  42     static long activate(String moduleName, DTraceProvider[] providers) {
  43         return activate0(moduleName, providers);
  44     }
  45 
  46     static void dispose(long handle) {
  47         dispose0(handle);
  48     }
  49 
  50     static boolean isEnabled(Method m) {
  51         return isEnabled0(m);
  52     }
  53 
  54     static boolean isSupported() {
  55         return isSupported0();
  56     }
  57 
  58     static Class<?> defineClass(
  59             ClassLoader loader, String name, byte[] b, int off, int len) {
  60         return defineClass0(loader, name, b, off, len);
  61     }
  62 
  63     private static native long activate0(
  64         String moduleName, DTraceProvider[] providers);
  65     private static native void dispose0(long activation_handle);
  66     private static native boolean isEnabled0(Method m);
  67     private static native boolean isSupported0();
  68     private static native Class<?> defineClass0(
  69         ClassLoader loader, String name, byte[] b, int off, int len);
  70 }