1 /*

     2  * Copyright (c) 2008, 2012, 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 }