src/java.base/share/native/libjava/VM.c
author rriggs
Fri, 09 Nov 2018 13:28:16 -0500
changeset 52478 b915bd68d907
parent 50951 b96466cdfc45
child 58493 55a8d95c7787
permissions -rw-r--r--
8185496: Improve performance of system properties initialization in initPhase1 8213424: VersionProps duplicate and skipped initialization Reviewed-by: mchung, redestad, dholmes
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/*
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 * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.  Oracle designates this
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 * particular file as subject to the "Classpath" exception as provided
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 * by Oracle in the LICENSE file that accompanied this code.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include "jni.h"
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#include "jni_util.h"
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#include "jvm.h"
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#include "jdk_util.h"
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#include "jdk_internal_misc_VM.h"
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/* Only register the performance-critical methods */
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static JNINativeMethod methods[] = {
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    {"getNanoTimeAdjustment", "(J)J", (void *)&JVM_GetNanoTimeAdjustment}
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};
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JNIEXPORT jobject JNICALL
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Java_jdk_internal_misc_VM_latestUserDefinedLoader0(JNIEnv *env, jclass cls) {
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    return JVM_LatestUserDefinedLoader(env);
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}
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JNIEXPORT void JNICALL
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Java_jdk_internal_misc_VM_initialize(JNIEnv *env, jclass cls) {
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    if (!JDK_InitJvmHandle()) {
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        JNU_ThrowInternalError(env, "Handle for JVM not found for symbol lookup");
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        return;
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    }
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    // Registers implementations of native methods described in methods[]
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    // above.
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    // In particular, registers JVM_GetNanoTimeAdjustment as the implementation
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    // of the native VM.getNanoTimeAdjustment - avoiding the cost of
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    // introducing a Java_jdk_internal_misc_VM_getNanoTimeAdjustment wrapper
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    (*env)->RegisterNatives(env, cls,
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                            methods, sizeof(methods)/sizeof(methods[0]));
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}
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JNIEXPORT jobjectArray JNICALL
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Java_jdk_internal_misc_VM_getRuntimeArguments(JNIEnv *env, jclass cls) {
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    return JVM_GetVmArguments(env);
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}
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JNIEXPORT void JNICALL
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Java_jdk_internal_misc_VM_initializeFromArchive(JNIEnv *env, jclass ignore,
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                                                jclass c) {
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    JVM_InitializeFromArchive(env, c);
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}