1 /*
2 * Copyright (c) 2003, 2017, 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 "jni_util.h"
29 #include "jvm.h"
30 #include "management.h"
31
32 #define ERR_MSG_SIZE 128
33
34 const JmmInterface* jmm_interface = NULL;
35 JavaVM* jvm = NULL;
36 jint jmm_version = 0;
37
38 JNIEXPORT jint JNICALL
DEF_JNI_OnLoad(JavaVM * vm,void * reserved)39 DEF_JNI_OnLoad(JavaVM *vm, void *reserved) {
40 JNIEnv* env;
41
42 jvm = vm;
43 if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_2) != JNI_OK) {
44 return JNI_ERR;
45 }
46
47 jmm_interface = (JmmInterface*) JVM_GetManagement(JMM_VERSION);
48 if (jmm_interface == NULL) {
49 JNU_ThrowInternalError(env, "Unsupported Management version");
50 return JNI_ERR;
51 }
52
53 jmm_version = jmm_interface->GetVersion(env);
54 return (*env)->GetVersion(env);
55 }
56
throw_internal_error(JNIEnv * env,const char * msg)57 void throw_internal_error(JNIEnv* env, const char* msg) {
58 char errmsg[128];
59
60 sprintf(errmsg, "errno: %d error: %s\n", errno, msg);
61 JNU_ThrowInternalError(env, errmsg);
62 }
63