1 /*

     2  * Copyright (c) 2015, 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 <stdio.h>

    27 #include <jni.h>

    28 #include "jvm.h"

    29 #include "management_ext.h"

    30 

    31 #define ERR_MSG_SIZE 128

    32 

    33 const JmmInterface* jmm_interface = NULL;

    34 JavaVM* jvm = NULL;

    35 jint jmm_version = 0;

    36 

    37 JNIEXPORT jint JNICALL

    38    JNI_OnLoad(JavaVM *vm, void *reserved) {

    39     JNIEnv* env;

    40 

    41     jvm = vm;

    42     if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_2) != JNI_OK) {

    43         return JNI_ERR;

    44     }

    45 

    46     jmm_interface = (JmmInterface*) JVM_GetManagement(JMM_VERSION_1_0);

    47     if (jmm_interface == NULL) {

    48         JNU_ThrowInternalError(env, "Unsupported Management version");

    49         return JNI_ERR;

    50     }

    51 

    52     jmm_version = jmm_interface->GetVersion(env);

    53     return (*env)->GetVersion(env);

    54 }

    55 

    56 void throw_internal_error(JNIEnv* env, const char* msg) {

    57     char errmsg[128];

    58 

    59     sprintf(errmsg, "errno: %d error: %s\n", errno, msg);

    60     JNU_ThrowInternalError(env, errmsg);

    61 }