JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package jdk.vm.ci.hotspot;

import jdk.vm.ci.meta.ResolvedJavaType;
import jdk.vm.ci.services.Services;

/**
 * Indicates a path in HotSpot JVMCI related code that is unsupported in the current execution
 * environment. For example, certain operations are not supported by JVMCI code running in an ahead
 * of time compiled {@linkplain Services#IS_IN_NATIVE_IMAGE native image}. This usually reflects
 * functionality only needed in non-native image execution that would require a more complex
 * implementation to support in a native image.
 *
 * An example of such functionality is {@link ResolvedJavaType#isLocal()}. This can be conveniently
 * implemented when JVMCI is running on the HotSpot heap as we can obtain the {@link Class} mirror
 * for the {@link ResolvedJavaType} and call {@link Class#isLocalClass()}. In a native image, there
 * is no {@link Class} mirror available in the native image heap so implementing this would involve
 * a call into VM native code that in turn would make an upcall into Java code executing on the
 * HotSpot heap. We have opted to defer implementing functionality such as this until there's a
 * demonstrated need for it.
 */
public class HotSpotJVMCIUnsupportedOperationError extends Error {


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