1 /*
 2  * Copyright (c) 2004, 2020, 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 "jni.h"
27 #include "jni_util.h"
28 #include "jvm.h"
29 #include "jdk_util.h"
30 
31 #include "jdk_internal_misc_VM.h"
32 
33 /* Only register the performance-critical methods */
34 static JNINativeMethod methods[] = {
35     {"getNanoTimeAdjustment", "(J)J", (void *)&JVM_GetNanoTimeAdjustment}
36 };
37 
38 JNIEXPORT jobject JNICALL
39 Java_jdk_internal_misc_VM_latestUserDefinedLoader0(JNIEnv *env, jclass cls) {
40     return JVM_LatestUserDefinedLoader(env);
41 }
42 
43 JNIEXPORT void JNICALL
44 Java_jdk_internal_misc_VM_initialize(JNIEnv *env, jclass cls) {
45     // Registers implementations of native methods described in methods[]
46     // above.
47     // In particular, registers JVM_GetNanoTimeAdjustment as the implementation
48     // of the native VM.getNanoTimeAdjustment - avoiding the cost of
49     // introducing a Java_jdk_internal_misc_VM_getNanoTimeAdjustment wrapper
50     (*env)->RegisterNatives(env, cls,
51                             methods, sizeof(methods)/sizeof(methods[0]));
52 }
53 
54 JNIEXPORT jobjectArray JNICALL
55 Java_jdk_internal_misc_VM_getRuntimeArguments(JNIEnv *env, jclass cls) {
56     return JVM_GetVmArguments(env);
57 }