jdk/src/java.base/share/classes/jdk/internal/access/JavaLangInvokeAccess.java

/*
 * Copyright (c) 2015, 2022, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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
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package jdk.internal.access;

import jdk.internal.invoke.NativeEntryPoint;

import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.invoke.MethodType;
import java.lang.invoke.VarHandle;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.nio.ByteOrder;
import java.util.List;
import java.util.Map;
import java.util.stream.Stream;

public interface JavaLangInvokeAccess {
    /**
     * Create a new MemberName instance. Used by {@code StackFrameInfo}.
     */
    Object newMemberName();

    /**
     * Returns the name for the given MemberName. Used by {@code StackFrameInfo}.
     */
    String getName(Object mname);

    /**
     * Returns the {@code MethodType} for the given MemberName.
     * Used by {@code StackFrameInfo}.
     */
    MethodType getMethodType(Object mname);

    /**
     * Returns the descriptor for the given MemberName.
     * Used by {@code StackFrameInfo}.
     */
    String getMethodDescriptor(Object mname);

    /**
     * Returns {@code true} if the given MemberName is a native method.
     * Used by {@code StackFrameInfo}.
     */
    boolean isNative(Object mname);

    /**
     * Returns the declaring class for the given MemberName.
     * Used by {@code StackFrameInfo}.
     */
    Class<?> getDeclaringClass(Object mname);

    /**
     * Returns a map of class name in internal forms to its corresponding
     * class bytes per the given stream of LF_RESOLVE and SPECIES_RESOLVE
     * trace logs. Used by GenerateJLIClassesPlugin to enable generation
     * of such classes during the jlink phase.
     */
    Map<String, byte[]> generateHolderClasses(Stream<String> traces);

    /**
     * Returns a var handle view of a given memory segment.
     * Used by {@code jdk.internal.foreign.LayoutPath} and
     * {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle memorySegmentViewHandle(Class<?> carrier, long alignmentMask, ByteOrder order);

    /**
     * Var handle carrier combinator.
     * Used by {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle filterValue(VarHandle target, MethodHandle filterToTarget, MethodHandle filterFromTarget);

    /**
     * Var handle filter coordinates combinator.
     * Used by {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle filterCoordinates(VarHandle target, int pos, MethodHandle... filters);

    /**
     * Var handle drop coordinates combinator.
     * Used by {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle dropCoordinates(VarHandle target, int pos, Class<?>... valueTypes);

    /**
     * Var handle permute coordinates combinator.
     * Used by {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle permuteCoordinates(VarHandle target, List<Class<?>> newCoordinates, int... reorder);

    /**
     * Var handle collect coordinates combinator.
     * Used by {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle collectCoordinates(VarHandle target, int pos, MethodHandle filter);

    /**
     * Var handle insert coordinates combinator.
     * Used by {@code java.lang.invoke.MethodHandles}.
     */
    VarHandle insertCoordinates(VarHandle target, int pos, Object... values);

    /**
     * Returns a native method handle with given arguments as fallback and steering info.
     *
     * Will allow JIT to intrinsify.
     *
     * @param nep the native entry point
     * @param fallback the fallback handle
     * @return the native method handle
     */
    MethodHandle nativeMethodHandle(NativeEntryPoint nep, MethodHandle fallback);

    /**
     * Ensure given method handle is customized
     *
     * @param mh the method handle
     */
    void ensureCustomized(MethodHandle mh);

    /**
     * Produces a method handle unreflecting from a {@code Constructor} with
     * the trusted lookup
     */
    MethodHandle unreflectConstructor(Constructor<?> ctor) throws IllegalAccessException;

    /**
     * Produces a method handle unreflecting from a {@code Field} with
     * the trusted lookup
     */
    MethodHandle unreflectField(Field field, boolean isSetter) throws IllegalAccessException;

    /**
     * Produces a method handle of a virtual method with the trusted lookup.
     */
    MethodHandle findVirtual(Class<?> defc, String name, MethodType type) throws IllegalAccessException;

    /**
     * Produces a method handle of a static method with the trusted lookup.
     */
    MethodHandle findStatic(Class<?> defc, String name, MethodType type) throws IllegalAccessException;

    /**
     * Returns a method handle of an invoker class injected for core reflection
     * implementation with the following signature:
     *     reflect_invoke_V(MethodHandle mh, Object target, Object[] args)
     *
     * The invoker class is a hidden class which has the same
     * defining class loader, runtime package, and protection domain
     * as the given caller class.
     */
    MethodHandle reflectiveInvoker(Class<?> caller);

    /**
     * Defines a hidden class of the given name and bytes with class data.
     * The given bytes is trusted.
     */
    Lookup defineHiddenClassWithClassData(Lookup caller, String name, byte[] bytes, Object classData, boolean initialize);

    /**
     * A best-effort method that tries to find any exceptions thrown by the given method handle.
     * @param handle the handle to check
     * @return an array of exceptions, or {@code null}.
     */
    Class<?>[] exceptionTypes(MethodHandle handle);
}