1 /*
2 * Copyright (c) 2004, 2014, 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 <string.h>
27
28 #include "jni.h"
29 #include "jni_util.h"
30 #include "jlong.h"
31 #include "jvm.h"
32 #include "jdk_util.h"
33
34 #include "sun_misc_VM.h"
35
36 JNIEXPORT jobject JNICALL
37 Java_sun_misc_VM_latestUserDefinedLoader(JNIEnv *env, jclass cls) {
38 return JVM_LatestUserDefinedLoader(env);
39 }
40
41 typedef void (JNICALL *GetJvmVersionInfo_fp)(JNIEnv*, jvm_version_info*, size_t);
42
43 JNIEXPORT void JNICALL
44 Java_sun_misc_VM_initialize(JNIEnv *env, jclass cls) {
45 GetJvmVersionInfo_fp func_p;
46
47 if (!JDK_InitJvmHandle()) {
48 JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup");
49 return;
50 }
51
52 func_p = (GetJvmVersionInfo_fp) JDK_FindJvmEntry("JVM_GetVersionInfo");
53 if (func_p != NULL) {
54 jvm_version_info info;
55
56 memset(&info, 0, sizeof(info));
57
58 /* obtain the JVM version info */
59 (*func_p)(env, &info, sizeof(info));
60 }
61 }
62
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1 /*
2 * Copyright (c) 2004, 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 <string.h>
27
28 #include "jni.h"
29 #include "jni_util.h"
30 #include "jlong.h"
31 #include "jvm.h"
32 #include "jdk_util.h"
33
34 #include "sun_misc_VM.h"
35
36 /* Only register the performance-critical methods */
37 static JNINativeMethod methods[] = {
38 {"getNanoTimeAdjustment", "(J)J", (void *)&JVM_GetNanoTimeAdjustment}
39 };
40
41 JNIEXPORT jobject JNICALL
42 Java_sun_misc_VM_latestUserDefinedLoader(JNIEnv *env, jclass cls) {
43 return JVM_LatestUserDefinedLoader(env);
44 }
45
46 typedef void (JNICALL *GetJvmVersionInfo_fp)(JNIEnv*, jvm_version_info*, size_t);
47
48 JNIEXPORT void JNICALL
49 Java_sun_misc_VM_initialize(JNIEnv *env, jclass cls) {
50 GetJvmVersionInfo_fp func_p;
51
52 if (!JDK_InitJvmHandle()) {
53 JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup");
54 return;
55 }
56
57 // Registers implementations of native methods described in methods[]
58 // above.
59 // In particular, registers JVM_GetNanoTimeAdjustment as the implementation
60 // of the native sun.misc.VM.getNanoTimeAdjustment - avoiding the cost of
61 // introducing a Java_sun_misc_VM_getNanoTimeAdjustment wrapper
62 (*env)->RegisterNatives(env, cls,
63 methods, sizeof(methods)/sizeof(methods[0]));
64
65 func_p = (GetJvmVersionInfo_fp) JDK_FindJvmEntry("JVM_GetVersionInfo");
66 if (func_p != NULL) {
67 jvm_version_info info;
68
69 memset(&info, 0, sizeof(info));
70
71 /* obtain the JVM version info */
72 (*func_p)(env, &info, sizeof(info));
73 }
74 }
75
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