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/*
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* Copyright (c) 2011, 2017, 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.
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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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package jdk.vm.ci.hotspot;
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import static jdk.vm.ci.hotspot.CompilerToVM.compilerToVM;
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import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.runtime;
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import static jdk.vm.ci.hotspot.HotSpotVMConfig.config;
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import static jdk.vm.ci.hotspot.UnsafeAccess.UNSAFE;
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import java.lang.invoke.MethodHandle;
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import jdk.vm.ci.common.JVMCIError;
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import jdk.vm.ci.meta.ConstantPool;
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import jdk.vm.ci.meta.JavaConstant;
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import jdk.vm.ci.meta.JavaField;
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import jdk.vm.ci.meta.JavaMethod;
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import jdk.vm.ci.meta.JavaType;
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import jdk.vm.ci.meta.ResolvedJavaMethod;
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import jdk.vm.ci.meta.ResolvedJavaType;
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import jdk.vm.ci.meta.Signature;
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/**
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* Implementation of {@link ConstantPool} for HotSpot.
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*/
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public final class HotSpotConstantPool implements ConstantPool, MetaspaceWrapperObject {
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/**
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* Subset of JVM bytecode opcodes used by {@link HotSpotConstantPool}.
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*/
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public static class Bytecodes {
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public static final int LDC = 18; // 0x12
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public static final int LDC_W = 19; // 0x13
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public static final int LDC2_W = 20; // 0x14
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public static final int GETSTATIC = 178; // 0xB2
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public static final int PUTSTATIC = 179; // 0xB3
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public static final int GETFIELD = 180; // 0xB4
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public static final int PUTFIELD = 181; // 0xB5
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public static final int INVOKEVIRTUAL = 182; // 0xB6
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public static final int INVOKESPECIAL = 183; // 0xB7
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public static final int INVOKESTATIC = 184; // 0xB8
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public static final int INVOKEINTERFACE = 185; // 0xB9
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public static final int INVOKEDYNAMIC = 186; // 0xBA
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public static final int NEW = 187; // 0xBB
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public static final int NEWARRAY = 188; // 0xBC
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public static final int ANEWARRAY = 189; // 0xBD
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public static final int CHECKCAST = 192; // 0xC0
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public static final int INSTANCEOF = 193; // 0xC1
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public static final int MULTIANEWARRAY = 197; // 0xC5
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static boolean isInvoke(int opcode) {
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switch (opcode) {
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case INVOKEVIRTUAL:
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case INVOKESPECIAL:
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case INVOKESTATIC:
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case INVOKEINTERFACE:
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case INVOKEDYNAMIC:
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return true;
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default:
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return false;
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}
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}
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/**
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* See: {@code Rewriter::maybe_rewrite_invokehandle}.
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*/
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static boolean isInvokeHandleAlias(int opcode) {
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switch (opcode) {
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case INVOKEVIRTUAL:
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case INVOKESPECIAL:
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return true;
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default:
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return false;
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}
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}
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}
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/**
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* Enum of all {@code JVM_CONSTANT} constants used in the VM. This includes the public and
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* internal ones.
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*/
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private enum JVM_CONSTANT {
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// @formatter:off
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Utf8(config().jvmConstantUtf8),
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Integer(config().jvmConstantInteger),
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Long(config().jvmConstantLong),
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Float(config().jvmConstantFloat),
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Double(config().jvmConstantDouble),
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Class(config().jvmConstantClass),
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UnresolvedClass(config().jvmConstantUnresolvedClass),
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UnresolvedClassInError(config().jvmConstantUnresolvedClassInError),
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String(config().jvmConstantString),
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Fieldref(config().jvmConstantFieldref),
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MethodRef(config().jvmConstantMethodref),
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InterfaceMethodref(config().jvmConstantInterfaceMethodref),
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NameAndType(config().jvmConstantNameAndType),
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MethodHandle(config().jvmConstantMethodHandle),
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MethodHandleInError(config().jvmConstantMethodHandleInError),
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MethodType(config().jvmConstantMethodType),
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MethodTypeInError(config().jvmConstantMethodTypeInError),
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InvokeDynamic(config().jvmConstantInvokeDynamic);
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// @formatter:on
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private final int tag;
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private static final int ExternalMax = config().jvmConstantExternalMax;
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private static final int InternalMin = config().jvmConstantInternalMin;
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private static final int InternalMax = config().jvmConstantInternalMax;
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JVM_CONSTANT(int tag) {
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this.tag = tag;
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}
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/**
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* Maps JVM_CONSTANT tags to {@link JVM_CONSTANT} values. Using a separate class for lazy
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* initialization.
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*/
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static class TagValueMap {
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private static final JVM_CONSTANT[] table = new JVM_CONSTANT[ExternalMax + 1 + (InternalMax - InternalMin) + 1];
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static {
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assert InternalMin > ExternalMax;
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for (JVM_CONSTANT e : values()) {
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table[indexOf(e.tag)] = e;
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}
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}
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private static int indexOf(int tag) {
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if (tag >= InternalMin) {
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return tag - InternalMin + ExternalMax + 1;
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} else {
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assert tag <= ExternalMax;
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}
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return tag;
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}
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static JVM_CONSTANT get(int tag) {
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JVM_CONSTANT res = table[indexOf(tag)];
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if (res != null) {
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return res;
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}
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throw new JVMCIError("Unknown JVM_CONSTANT tag %s", tag);
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}
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}
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public static JVM_CONSTANT getEnum(int tag) {
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return TagValueMap.get(tag);
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}
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}
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private static class LookupTypeCacheElement {
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int lastCpi = Integer.MIN_VALUE;
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JavaType javaType;
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LookupTypeCacheElement(int lastCpi, JavaType javaType) {
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super();
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this.lastCpi = lastCpi;
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this.javaType = javaType;
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}
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}
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/**
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* Reference to the C++ ConstantPool object.
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*/
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private final long metaspaceConstantPool;
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private volatile LookupTypeCacheElement lastLookupType;
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/**
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* Gets the JVMCI mirror from a HotSpot constant pool.The VM is responsible for ensuring that
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* the ConstantPool is kept alive for the duration of this call and the
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* {@link HotSpotJVMCIMetaAccessContext} keeps it alive after that.
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*
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* Called from the VM.
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*
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* @param metaspaceConstantPool a metaspace ConstantPool object
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* @return the {@link HotSpotConstantPool} corresponding to {@code metaspaceConstantPool}
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*/
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@SuppressWarnings("unused")
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private static HotSpotConstantPool fromMetaspace(long metaspaceConstantPool) {
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HotSpotConstantPool cp = new HotSpotConstantPool(metaspaceConstantPool);
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runtime().metaAccessContext.add(cp);
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return cp;
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}
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private HotSpotConstantPool(long metaspaceConstantPool) {
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this.metaspaceConstantPool = metaspaceConstantPool;
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}
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/**
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* Gets the holder for this constant pool as {@link HotSpotResolvedObjectTypeImpl}.
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*
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* @return holder for this constant pool
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*/
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private HotSpotResolvedObjectType getHolder() {
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return compilerToVM().getResolvedJavaType(this, config().constantPoolHolderOffset, false);
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}
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/**
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* Converts a raw index from the bytecodes to a constant pool cache index by adding a
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* {@link HotSpotVMConfig#constantPoolCpCacheIndexTag constant}.
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*
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* @param rawIndex index from the bytecode
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* @param opcode bytecode to convert the index for
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* @return constant pool cache index
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*/
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private static int rawIndexToConstantPoolCacheIndex(int rawIndex, int opcode) {
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int index;
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if (opcode == Bytecodes.INVOKEDYNAMIC) {
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index = rawIndex;
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// See: ConstantPool::is_invokedynamic_index
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assert index < 0 : "not an invokedynamic constant pool index " + index;
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} else {
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assert opcode == Bytecodes.GETFIELD || opcode == Bytecodes.PUTFIELD || opcode == Bytecodes.GETSTATIC || opcode == Bytecodes.PUTSTATIC || opcode == Bytecodes.INVOKEINTERFACE ||
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opcode == Bytecodes.INVOKEVIRTUAL || opcode == Bytecodes.INVOKESPECIAL || opcode == Bytecodes.INVOKESTATIC : "unexpected invoke opcode " + opcode;
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index = rawIndex + config().constantPoolCpCacheIndexTag;
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}
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return index;
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}
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/**
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* Decode a constant pool cache index to a constant pool index.
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*
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* See {@code ConstantPool::decode_cpcache_index}.
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*
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* @param index constant pool cache index
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* @return decoded index
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*/
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private static int decodeConstantPoolCacheIndex(int index) {
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if (isInvokedynamicIndex(index)) {
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return decodeInvokedynamicIndex(index);
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} else {
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return index - config().constantPoolCpCacheIndexTag;
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}
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}
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/**
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* See {@code ConstantPool::is_invokedynamic_index}.
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*/
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private static boolean isInvokedynamicIndex(int index) {
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return index < 0;
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}
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/**
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* See {@code ConstantPool::decode_invokedynamic_index}.
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*/
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private static int decodeInvokedynamicIndex(int i) {
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assert isInvokedynamicIndex(i) : i;
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return ~i;
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}
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long getMetaspaceConstantPool() {
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return metaspaceConstantPool;
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}
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@Override
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public long getMetaspacePointer() {
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return getMetaspaceConstantPool();
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}
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/**
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* Gets the constant pool tag at index {@code index}.
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*
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* @param index constant pool index
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* @return constant pool tag
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*/
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private JVM_CONSTANT getTagAt(int index) {
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assert checkBounds(index);
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HotSpotVMConfig config = config();
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final long metaspaceConstantPoolTags = UNSAFE.getAddress(getMetaspaceConstantPool() + config.constantPoolTagsOffset);
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final int tag = UNSAFE.getByteVolatile(null, metaspaceConstantPoolTags + config.arrayU1DataOffset + index);
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if (tag == 0) {
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return null;
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}
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return JVM_CONSTANT.getEnum(tag);
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}
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/**
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* Gets the constant pool entry at index {@code index}.
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*
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* @param index constant pool index
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* @return constant pool entry
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*/
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long getEntryAt(int index) {
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assert checkBounds(index);
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int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
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return UNSAFE.getAddress(getMetaspaceConstantPool() + config().constantPoolSize + offset);
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}
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/**
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* Gets the integer constant pool entry at index {@code index}.
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*
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* @param index constant pool index
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* @return integer constant pool entry at index
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*/
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private int getIntAt(int index) {
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assert checkTag(index, JVM_CONSTANT.Integer);
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int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
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return UNSAFE.getInt(getMetaspaceConstantPool() + config().constantPoolSize + offset);
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}
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/**
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* Gets the long constant pool entry at index {@code index}.
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*
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* @param index constant pool index
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* @return long constant pool entry
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*/
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private long getLongAt(int index) {
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assert checkTag(index, JVM_CONSTANT.Long);
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int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
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return UNSAFE.getLong(getMetaspaceConstantPool() + config().constantPoolSize + offset);
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}
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/**
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* Gets the float constant pool entry at index {@code index}.
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*
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* @param index constant pool index
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* @return float constant pool entry
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*/
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private float getFloatAt(int index) {
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assert checkTag(index, JVM_CONSTANT.Float);
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int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
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return UNSAFE.getFloat(getMetaspaceConstantPool() + config().constantPoolSize + offset);
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}
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/**
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* Gets the double constant pool entry at index {@code index}.
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*
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* @param index constant pool index
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* @return float constant pool entry
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*/
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private double getDoubleAt(int index) {
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assert checkTag(index, JVM_CONSTANT.Double);
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int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
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return UNSAFE.getDouble(getMetaspaceConstantPool() + config().constantPoolSize + offset);
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}
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/**
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* Gets the {@code JVM_CONSTANT_NameAndType} constant pool entry at index {@code index}.
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*
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* @param index constant pool index
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* @return {@code JVM_CONSTANT_NameAndType} constant pool entry
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*/
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private int getNameAndTypeAt(int index) {
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assert checkTag(index, JVM_CONSTANT.NameAndType);
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int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
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return UNSAFE.getInt(getMetaspaceConstantPool() + config().constantPoolSize + offset);
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}
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/**
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* Gets the {@code JVM_CONSTANT_NameAndType} reference index constant pool entry at index
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* {@code index}.
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*
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* @param index constant pool index
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* @return {@code JVM_CONSTANT_NameAndType} reference constant pool entry
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*/
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private int getNameAndTypeRefIndexAt(int index) {
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return compilerToVM().lookupNameAndTypeRefIndexInPool(this, index);
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}
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/**
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* Gets the name of a {@code JVM_CONSTANT_NameAndType} constant pool entry referenced by another
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* entry denoted by {@code which}.
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*
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* @param which constant pool index or constant pool cache index
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* @return name as {@link String}
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*/
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private String getNameOf(int which) {
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return compilerToVM().lookupNameInPool(this, which);
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}
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/**
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* Gets the name reference index of a {@code JVM_CONSTANT_NameAndType} constant pool entry at
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* index {@code index}.
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*
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* @param index constant pool index
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* @return name reference index
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*/
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private int getNameRefIndexAt(int index) {
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final int refIndex = getNameAndTypeAt(index);
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// name ref index is in the low 16-bits.
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return refIndex & 0xFFFF;
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}
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/**
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* Gets the signature of a {@code JVM_CONSTANT_NameAndType} constant pool entry referenced by
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* another entry denoted by {@code which}.
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406 |
*
|
|
407 |
* @param which constant pool index or constant pool cache index
|
|
408 |
* @return signature as {@link String}
|
|
409 |
*/
|
|
410 |
private String getSignatureOf(int which) {
|
|
411 |
return compilerToVM().lookupSignatureInPool(this, which);
|
|
412 |
}
|
|
413 |
|
|
414 |
/**
|
|
415 |
* Gets the signature reference index of a {@code JVM_CONSTANT_NameAndType} constant pool entry
|
|
416 |
* at index {@code index}.
|
|
417 |
*
|
|
418 |
* @param index constant pool index
|
|
419 |
* @return signature reference index
|
|
420 |
*/
|
|
421 |
private int getSignatureRefIndexAt(int index) {
|
|
422 |
final int refIndex = getNameAndTypeAt(index);
|
|
423 |
// signature ref index is in the high 16-bits.
|
|
424 |
return refIndex >>> 16;
|
|
425 |
}
|
|
426 |
|
|
427 |
/**
|
|
428 |
* Gets the klass reference index constant pool entry at index {@code index}.
|
|
429 |
*
|
|
430 |
* @param index constant pool index
|
|
431 |
* @return klass reference index
|
|
432 |
*/
|
|
433 |
private int getKlassRefIndexAt(int index) {
|
|
434 |
return compilerToVM().lookupKlassRefIndexInPool(this, index);
|
|
435 |
}
|
|
436 |
|
|
437 |
/**
|
|
438 |
* Gets the uncached klass reference index constant pool entry at index {@code index}. See:
|
|
439 |
* {@code ConstantPool::uncached_klass_ref_index_at}.
|
|
440 |
*
|
|
441 |
* @param index constant pool index
|
|
442 |
* @return klass reference index
|
|
443 |
*/
|
|
444 |
private int getUncachedKlassRefIndexAt(int index) {
|
|
445 |
assert checkTagIsFieldOrMethod(index);
|
|
446 |
int offset = index * runtime().getHostJVMCIBackend().getTarget().wordSize;
|
|
447 |
final int refIndex = UNSAFE.getInt(getMetaspaceConstantPool() + config().constantPoolSize + offset);
|
|
448 |
// klass ref index is in the low 16-bits.
|
|
449 |
return refIndex & 0xFFFF;
|
|
450 |
}
|
|
451 |
|
|
452 |
/**
|
|
453 |
* Checks that the constant pool index {@code index} is in the bounds of the constant pool.
|
|
454 |
*
|
|
455 |
* @param index constant pool index
|
|
456 |
* @throws AssertionError if the check fails
|
|
457 |
*/
|
|
458 |
private boolean checkBounds(int index) {
|
|
459 |
assert 0 <= index && index < length() : "index " + index + " not between 0 and " + length();
|
|
460 |
return true;
|
|
461 |
}
|
|
462 |
|
|
463 |
/**
|
|
464 |
* Checks that the constant pool tag at index {@code index} is equal to {@code tag}.
|
|
465 |
*
|
|
466 |
* @param index constant pool index
|
|
467 |
* @param tag expected tag
|
|
468 |
* @throws AssertionError if the check fails
|
|
469 |
*/
|
|
470 |
private boolean checkTag(int index, JVM_CONSTANT tag) {
|
|
471 |
final JVM_CONSTANT tagAt = getTagAt(index);
|
|
472 |
assert tagAt == tag : "constant pool tag at index " + index + " is " + tagAt + " but expected " + tag;
|
|
473 |
return true;
|
|
474 |
}
|
|
475 |
|
|
476 |
/**
|
|
477 |
* Asserts that the constant pool tag at index {@code index} is a {@link JVM_CONSTANT#Fieldref},
|
|
478 |
* or a {@link JVM_CONSTANT#MethodRef}, or a {@link JVM_CONSTANT#InterfaceMethodref}.
|
|
479 |
*
|
|
480 |
* @param index constant pool index
|
|
481 |
* @throws AssertionError if the check fails
|
|
482 |
*/
|
|
483 |
private boolean checkTagIsFieldOrMethod(int index) {
|
|
484 |
final JVM_CONSTANT tagAt = getTagAt(index);
|
|
485 |
assert tagAt == JVM_CONSTANT.Fieldref || tagAt == JVM_CONSTANT.MethodRef || tagAt == JVM_CONSTANT.InterfaceMethodref : tagAt;
|
|
486 |
return true;
|
|
487 |
}
|
|
488 |
|
|
489 |
@Override
|
|
490 |
public int length() {
|
|
491 |
return UNSAFE.getInt(getMetaspaceConstantPool() + config().constantPoolLengthOffset);
|
|
492 |
}
|
|
493 |
|
48826
|
494 |
public boolean hasDynamicConstant() {
|
|
495 |
return (flags() & config().constantPoolHasDynamicConstant) != 0;
|
|
496 |
}
|
|
497 |
|
|
498 |
private int flags() {
|
|
499 |
return UNSAFE.getInt(getMetaspaceConstantPool() + config().constantPoolFlagsOffset);
|
|
500 |
}
|
|
501 |
|
43972
|
502 |
@Override
|
|
503 |
public Object lookupConstant(int cpi) {
|
|
504 |
assert cpi != 0;
|
|
505 |
final JVM_CONSTANT tag = getTagAt(cpi);
|
|
506 |
switch (tag) {
|
|
507 |
case Integer:
|
|
508 |
return JavaConstant.forInt(getIntAt(cpi));
|
|
509 |
case Long:
|
|
510 |
return JavaConstant.forLong(getLongAt(cpi));
|
|
511 |
case Float:
|
|
512 |
return JavaConstant.forFloat(getFloatAt(cpi));
|
|
513 |
case Double:
|
|
514 |
return JavaConstant.forDouble(getDoubleAt(cpi));
|
|
515 |
case Class:
|
|
516 |
case UnresolvedClass:
|
|
517 |
case UnresolvedClassInError:
|
|
518 |
final int opcode = -1; // opcode is not used
|
|
519 |
return lookupType(cpi, opcode);
|
|
520 |
case String:
|
|
521 |
/*
|
|
522 |
* Normally, we would expect a String here, but anonymous classes can have
|
|
523 |
* "pseudo strings" (arbitrary live objects) patched into a String entry. Such
|
|
524 |
* entries do not have a symbol in the constant pool slot.
|
|
525 |
*/
|
|
526 |
Object string = compilerToVM().resolvePossiblyCachedConstantInPool(this, cpi);
|
|
527 |
return HotSpotObjectConstantImpl.forObject(string);
|
|
528 |
case MethodHandle:
|
|
529 |
case MethodHandleInError:
|
|
530 |
case MethodType:
|
|
531 |
case MethodTypeInError:
|
|
532 |
Object obj = compilerToVM().resolveConstantInPool(this, cpi);
|
|
533 |
return HotSpotObjectConstantImpl.forObject(obj);
|
|
534 |
default:
|
|
535 |
throw new JVMCIError("Unknown constant pool tag %s", tag);
|
|
536 |
}
|
|
537 |
}
|
|
538 |
|
|
539 |
@Override
|
|
540 |
public String lookupUtf8(int cpi) {
|
|
541 |
assert checkTag(cpi, JVM_CONSTANT.Utf8);
|
|
542 |
return compilerToVM().getSymbol(getEntryAt(cpi));
|
|
543 |
}
|
|
544 |
|
|
545 |
@Override
|
|
546 |
public Signature lookupSignature(int cpi) {
|
|
547 |
return new HotSpotSignature(runtime(), lookupUtf8(cpi));
|
|
548 |
}
|
|
549 |
|
|
550 |
@Override
|
|
551 |
public JavaConstant lookupAppendix(int cpi, int opcode) {
|
|
552 |
assert Bytecodes.isInvoke(opcode);
|
47668
|
553 |
final int index = rawIndexToConstantPoolCacheIndex(cpi, opcode);
|
43972
|
554 |
Object appendix = compilerToVM().lookupAppendixInPool(this, index);
|
|
555 |
if (appendix == null) {
|
|
556 |
return null;
|
|
557 |
} else {
|
|
558 |
return HotSpotObjectConstantImpl.forObject(appendix);
|
|
559 |
}
|
|
560 |
}
|
|
561 |
|
|
562 |
/**
|
|
563 |
* Gets a {@link JavaType} corresponding a given resolved or unresolved type.
|
|
564 |
*
|
|
565 |
* @param type either a ResolvedJavaType or a String naming a unresolved type.
|
|
566 |
*/
|
|
567 |
private static JavaType getJavaType(final Object type) {
|
|
568 |
if (type instanceof String) {
|
|
569 |
String name = (String) type;
|
|
570 |
return HotSpotUnresolvedJavaType.create(runtime(), "L" + name + ";");
|
|
571 |
} else {
|
|
572 |
return (JavaType) type;
|
|
573 |
}
|
|
574 |
}
|
|
575 |
|
|
576 |
@Override
|
|
577 |
public JavaMethod lookupMethod(int cpi, int opcode) {
|
47668
|
578 |
final int index = rawIndexToConstantPoolCacheIndex(cpi, opcode);
|
43972
|
579 |
final HotSpotResolvedJavaMethod method = compilerToVM().lookupMethodInPool(this, index, (byte) opcode);
|
|
580 |
if (method != null) {
|
|
581 |
return method;
|
|
582 |
} else {
|
|
583 |
// Get the method's name and signature.
|
|
584 |
String name = getNameOf(index);
|
|
585 |
HotSpotSignature signature = new HotSpotSignature(runtime(), getSignatureOf(index));
|
|
586 |
if (opcode == Bytecodes.INVOKEDYNAMIC) {
|
|
587 |
HotSpotResolvedObjectType holder = HotSpotResolvedObjectTypeImpl.fromObjectClass(MethodHandle.class);
|
|
588 |
return new HotSpotMethodUnresolved(name, signature, holder);
|
|
589 |
} else {
|
|
590 |
final int klassIndex = getKlassRefIndexAt(index);
|
|
591 |
final Object type = compilerToVM().lookupKlassInPool(this, klassIndex);
|
|
592 |
JavaType holder = getJavaType(type);
|
|
593 |
return new HotSpotMethodUnresolved(name, signature, holder);
|
|
594 |
}
|
|
595 |
}
|
|
596 |
}
|
|
597 |
|
|
598 |
@Override
|
|
599 |
public JavaType lookupType(int cpi, int opcode) {
|
|
600 |
final LookupTypeCacheElement elem = this.lastLookupType;
|
|
601 |
if (elem != null && elem.lastCpi == cpi) {
|
|
602 |
return elem.javaType;
|
|
603 |
} else {
|
|
604 |
final Object type = compilerToVM().lookupKlassInPool(this, cpi);
|
|
605 |
JavaType result = getJavaType(type);
|
|
606 |
if (result instanceof ResolvedJavaType) {
|
|
607 |
this.lastLookupType = new LookupTypeCacheElement(cpi, result);
|
|
608 |
}
|
|
609 |
return result;
|
|
610 |
}
|
|
611 |
}
|
|
612 |
|
|
613 |
@Override
|
|
614 |
public JavaField lookupField(int cpi, ResolvedJavaMethod method, int opcode) {
|
47668
|
615 |
final int index = rawIndexToConstantPoolCacheIndex(cpi, opcode);
|
43972
|
616 |
final int nameAndTypeIndex = getNameAndTypeRefIndexAt(index);
|
|
617 |
final int typeIndex = getSignatureRefIndexAt(nameAndTypeIndex);
|
|
618 |
String typeName = lookupUtf8(typeIndex);
|
|
619 |
JavaType type = runtime().lookupType(typeName, getHolder(), false);
|
|
620 |
|
|
621 |
final int holderIndex = getKlassRefIndexAt(index);
|
|
622 |
JavaType holder = lookupType(holderIndex, opcode);
|
|
623 |
|
|
624 |
if (holder instanceof HotSpotResolvedObjectTypeImpl) {
|
|
625 |
int[] info = new int[3];
|
|
626 |
HotSpotResolvedObjectTypeImpl resolvedHolder;
|
|
627 |
try {
|
|
628 |
resolvedHolder = compilerToVM().resolveFieldInPool(this, index, (HotSpotResolvedJavaMethodImpl) method, (byte) opcode, info);
|
|
629 |
} catch (Throwable t) {
|
|
630 |
/*
|
|
631 |
* If there was an exception resolving the field we give up and return an unresolved
|
|
632 |
* field.
|
|
633 |
*/
|
|
634 |
return new HotSpotUnresolvedField(holder, lookupUtf8(getNameRefIndexAt(nameAndTypeIndex)), type);
|
|
635 |
}
|
|
636 |
final int flags = info[0];
|
|
637 |
final int offset = info[1];
|
|
638 |
final int fieldIndex = info[2];
|
|
639 |
HotSpotResolvedJavaField result = resolvedHolder.createField(type, offset, flags, fieldIndex);
|
|
640 |
return result;
|
|
641 |
} else {
|
|
642 |
return new HotSpotUnresolvedField(holder, lookupUtf8(getNameRefIndexAt(nameAndTypeIndex)), type);
|
|
643 |
}
|
|
644 |
}
|
|
645 |
|
47668
|
646 |
/*
|
|
647 |
* Converts a raw index from the bytecodes to a constant pool index
|
|
648 |
* (not a cache index).
|
|
649 |
*
|
|
650 |
* @param rawIndex index from the bytecode
|
|
651 |
* @param opcode bytecode to convert the index for
|
|
652 |
* @return constant pool index
|
|
653 |
*/
|
|
654 |
public int rawIndexToConstantPoolIndex(int index, int opcode) {
|
|
655 |
if (isInvokedynamicIndex(index)) {
|
|
656 |
assert opcode == Bytecodes.INVOKEDYNAMIC;
|
|
657 |
index = decodeInvokedynamicIndex(index) + config().constantPoolCpCacheIndexTag;
|
|
658 |
} else {
|
|
659 |
assert opcode != Bytecodes.INVOKEDYNAMIC;
|
|
660 |
index = rawIndexToConstantPoolCacheIndex(index, opcode);
|
|
661 |
}
|
|
662 |
return compilerToVM().constantPoolRemapInstructionOperandFromCache(this, index);
|
|
663 |
}
|
|
664 |
|
43972
|
665 |
@Override
|
|
666 |
@SuppressWarnings("fallthrough")
|
|
667 |
public void loadReferencedType(int cpi, int opcode) {
|
|
668 |
int index;
|
|
669 |
switch (opcode) {
|
|
670 |
case Bytecodes.CHECKCAST:
|
|
671 |
case Bytecodes.INSTANCEOF:
|
|
672 |
case Bytecodes.NEW:
|
|
673 |
case Bytecodes.ANEWARRAY:
|
|
674 |
case Bytecodes.MULTIANEWARRAY:
|
|
675 |
case Bytecodes.LDC:
|
|
676 |
case Bytecodes.LDC_W:
|
|
677 |
case Bytecodes.LDC2_W:
|
|
678 |
index = cpi;
|
|
679 |
break;
|
|
680 |
case Bytecodes.INVOKEDYNAMIC: {
|
|
681 |
// invokedynamic instructions point to a constant pool cache entry.
|
|
682 |
index = decodeConstantPoolCacheIndex(cpi) + config().constantPoolCpCacheIndexTag;
|
|
683 |
index = compilerToVM().constantPoolRemapInstructionOperandFromCache(this, index);
|
|
684 |
break;
|
|
685 |
}
|
|
686 |
case Bytecodes.GETSTATIC:
|
|
687 |
case Bytecodes.PUTSTATIC:
|
|
688 |
case Bytecodes.GETFIELD:
|
|
689 |
case Bytecodes.PUTFIELD:
|
|
690 |
case Bytecodes.INVOKEVIRTUAL:
|
|
691 |
case Bytecodes.INVOKESPECIAL:
|
|
692 |
case Bytecodes.INVOKESTATIC:
|
|
693 |
case Bytecodes.INVOKEINTERFACE: {
|
|
694 |
// invoke and field instructions point to a constant pool cache entry.
|
47668
|
695 |
index = rawIndexToConstantPoolCacheIndex(cpi, opcode);
|
43972
|
696 |
index = compilerToVM().constantPoolRemapInstructionOperandFromCache(this, index);
|
|
697 |
break;
|
|
698 |
}
|
|
699 |
default:
|
|
700 |
throw JVMCIError.shouldNotReachHere("Unexpected opcode " + opcode);
|
|
701 |
}
|
|
702 |
|
|
703 |
final JVM_CONSTANT tag = getTagAt(index);
|
|
704 |
if (tag == null) {
|
|
705 |
assert getTagAt(index - 1) == JVM_CONSTANT.Double || getTagAt(index - 1) == JVM_CONSTANT.Long;
|
|
706 |
return;
|
|
707 |
}
|
|
708 |
switch (tag) {
|
|
709 |
case MethodRef:
|
|
710 |
case Fieldref:
|
|
711 |
case InterfaceMethodref:
|
|
712 |
index = getUncachedKlassRefIndexAt(index);
|
|
713 |
// Read the tag only once because it could change between multiple reads.
|
|
714 |
final JVM_CONSTANT klassTag = getTagAt(index);
|
|
715 |
assert klassTag == JVM_CONSTANT.Class || klassTag == JVM_CONSTANT.UnresolvedClass || klassTag == JVM_CONSTANT.UnresolvedClassInError : klassTag;
|
|
716 |
// fall through
|
|
717 |
case Class:
|
|
718 |
case UnresolvedClass:
|
|
719 |
case UnresolvedClassInError:
|
|
720 |
final HotSpotResolvedObjectTypeImpl type = compilerToVM().resolveTypeInPool(this, index);
|
|
721 |
Class<?> klass = type.mirror();
|
|
722 |
if (!klass.isPrimitive() && !klass.isArray()) {
|
|
723 |
UNSAFE.ensureClassInitialized(klass);
|
|
724 |
}
|
|
725 |
if (tag == JVM_CONSTANT.MethodRef) {
|
|
726 |
if (Bytecodes.isInvokeHandleAlias(opcode) && isSignaturePolymorphicHolder(type)) {
|
47668
|
727 |
final int methodRefCacheIndex = rawIndexToConstantPoolCacheIndex(cpi, opcode);
|
43972
|
728 |
assert checkTag(compilerToVM().constantPoolRemapInstructionOperandFromCache(this, methodRefCacheIndex), JVM_CONSTANT.MethodRef);
|
|
729 |
compilerToVM().resolveInvokeHandleInPool(this, methodRefCacheIndex);
|
|
730 |
}
|
|
731 |
}
|
|
732 |
|
|
733 |
break;
|
|
734 |
case InvokeDynamic:
|
|
735 |
if (isInvokedynamicIndex(cpi)) {
|
|
736 |
compilerToVM().resolveInvokeDynamicInPool(this, cpi);
|
|
737 |
}
|
|
738 |
break;
|
|
739 |
default:
|
|
740 |
// nothing
|
|
741 |
break;
|
|
742 |
}
|
|
743 |
|
|
744 |
}
|
|
745 |
|
|
746 |
// Lazily initialized.
|
|
747 |
private static String[] signaturePolymorphicHolders;
|
|
748 |
|
|
749 |
/**
|
|
750 |
* Determines if {@code type} contains signature polymorphic methods.
|
|
751 |
*/
|
|
752 |
static boolean isSignaturePolymorphicHolder(final ResolvedJavaType type) {
|
|
753 |
String name = type.getName();
|
|
754 |
if (signaturePolymorphicHolders == null) {
|
|
755 |
signaturePolymorphicHolders = compilerToVM().getSignaturePolymorphicHolders();
|
|
756 |
}
|
|
757 |
for (String holder : signaturePolymorphicHolders) {
|
|
758 |
if (name.equals(holder)) {
|
|
759 |
return true;
|
|
760 |
}
|
|
761 |
}
|
|
762 |
return false;
|
|
763 |
}
|
|
764 |
|
47668
|
765 |
/**
|
|
766 |
* Check for a resolved dynamic adapter method at the specified index,
|
|
767 |
* resulting from either a resolved invokedynamic or invokevirtual on a signature polymorphic
|
|
768 |
* MethodHandle method (HotSpot invokehandle).
|
|
769 |
*
|
|
770 |
* @param cpi the constant pool index
|
|
771 |
* @param opcode the opcode of the instruction for which the lookup is being performed
|
|
772 |
* @return {@code true} if a signature polymorphic method reference was found, otherwise {@code false}
|
|
773 |
*/
|
|
774 |
public boolean isResolvedDynamicInvoke(int cpi, int opcode) {
|
|
775 |
if (Bytecodes.isInvokeHandleAlias(opcode)) {
|
|
776 |
final int methodRefCacheIndex = rawIndexToConstantPoolCacheIndex(cpi, opcode);
|
|
777 |
assert checkTag(compilerToVM().constantPoolRemapInstructionOperandFromCache(this, methodRefCacheIndex), JVM_CONSTANT.MethodRef);
|
|
778 |
int op = compilerToVM().isResolvedInvokeHandleInPool(this, methodRefCacheIndex);
|
|
779 |
return op == opcode;
|
|
780 |
}
|
|
781 |
return false;
|
|
782 |
}
|
|
783 |
|
43972
|
784 |
@Override
|
|
785 |
public String toString() {
|
|
786 |
HotSpotResolvedObjectType holder = getHolder();
|
|
787 |
return "HotSpotConstantPool<" + holder.toJavaName() + ">";
|
|
788 |
}
|
|
789 |
}
|