1 /*

     2  * Copyright (c) 2008, 2011, 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 <windows.h>

    27 #include <stdio.h>

    28 #include <string.h>

    29 #include <errno.h>

    30 

    31 #include <jvm.h>

    32 

    33 #include "jvm_symbols.h"

    34 

    35 JvmSymbols* lookupJvmSymbols() {

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

    37     if (syms != NULL) {

    38         HINSTANCE jvm = GetModuleHandle("jvm.dll");

    39         if (jvm == NULL) {

    40             free(syms);

    41             return NULL;

    42         }

    43         syms->GetVersion = (GetVersion_t)

    44             GetProcAddress(jvm, "JVM_DTraceGetVersion");

    45         syms->IsSupported = (IsSupported_t)

    46             GetProcAddress(jvm, "JVM_DTraceIsSupported");

    47         syms->Activate = (Activate_t)

    48             GetProcAddress(jvm, "JVM_DTraceActivate");

    49         syms->Dispose = (Dispose_t)

    50             GetProcAddress(jvm, "JVM_DTraceDispose");

    51         syms->IsProbeEnabled = (IsProbeEnabled_t)

    52             GetProcAddress(jvm, "JVM_DTraceIsProbeEnabled");

    53 

    54         (void)FreeLibrary(jvm);

    55         if ( syms->GetVersion == NULL || syms->IsSupported == NULL ||

    56              syms->Activate == NULL || syms->Dispose == NULL ||

    57              syms->IsProbeEnabled == NULL) {

    58             free(syms);

    59             syms = NULL;

    60         }

    61 

    62     }

    63     return syms;

    64 }