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 #include <dlfcn.h>

    27 #include <stdlib.h>

    28 

    29 #include <jvm.h>

    30 

    31 #include "jvm_symbols.h"

    32 

    33 JvmSymbols* lookupJvmSymbols() {

    34     JvmSymbols* syms = (JvmSymbols*)malloc(sizeof(JvmSymbols));

    35     if (syms != NULL) {

    36         syms->GetVersion = (GetVersion_t)

    37             dlsym(RTLD_DEFAULT, "JVM_DTraceGetVersion");

    38         syms->IsSupported = (IsSupported_t)

    39             dlsym(RTLD_DEFAULT, "JVM_DTraceIsSupported");

    40         syms->Activate = (Activate_t)

    41             dlsym(RTLD_DEFAULT, "JVM_DTraceActivate");

    42         syms->Dispose = (Dispose_t)

    43             dlsym(RTLD_DEFAULT, "JVM_DTraceDispose");

    44         syms->IsProbeEnabled = (IsProbeEnabled_t)

    45             dlsym(RTLD_DEFAULT, "JVM_DTraceIsProbeEnabled");

    46 

    47         if ( syms->GetVersion == NULL || syms->Activate == NULL ||

    48              syms->IsProbeEnabled == NULL || syms->Dispose == NULL ||

    49              syms->IsSupported == NULL) {

    50             free(syms);

    51             syms = NULL;

    52         }

    53     }

    54     return syms;

    55 }