Mercurial > hg > truffle
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/meta/HotSpotConstantReflectionProvider.java @ 16829:e3724f25056a
SL: use the new IntegerConditionProfile in simple language.
author | Christian Humer <christian.humer@gmail.com> |
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date | Thu, 14 Aug 2014 13:11:47 +0200 |
parents | b1be2a46cc5c |
children | c2270ad35f57 |
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/* * Copyright (c) 2011, 2012, 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 com.oracle.graal.hotspot.meta; import static com.oracle.graal.compiler.common.UnsafeAccess.*; import static com.oracle.graal.hotspot.replacements.HotSpotReplacementsUtil.*; import java.lang.reflect.*; import com.oracle.graal.api.meta.*; import com.oracle.graal.compiler.common.*; import com.oracle.graal.hotspot.*; /** * HotSpot implementation of {@link ConstantReflectionProvider}. */ public class HotSpotConstantReflectionProvider implements ConstantReflectionProvider { protected final HotSpotGraalRuntime runtime; public HotSpotConstantReflectionProvider(HotSpotGraalRuntime runtime) { this.runtime = runtime; } @Override public Boolean constantEquals(Constant x, Constant y) { return x.equals(y); } @Override public Integer readArrayLength(Constant array) { if (array.getKind() != Kind.Object || array.isNull() || !HotSpotObjectConstant.asObject(array).getClass().isArray()) { return null; } return Array.getLength(HotSpotObjectConstant.asObject(array)); } @Override public Constant readUnsafeConstant(Kind kind, Constant baseConstant, long initialDisplacement) { Object base; long displacement; if (baseConstant.getKind() == Kind.Object) { base = HotSpotObjectConstant.asObject(baseConstant); displacement = initialDisplacement; if (base == null) { return null; } } else if (baseConstant.getKind().isNumericInteger()) { long baseLong = baseConstant.asLong(); if (baseLong == 0L) { return null; } displacement = initialDisplacement + baseLong; base = null; } else { throw GraalInternalError.shouldNotReachHere(); } switch (kind) { case Boolean: return Constant.forBoolean(base == null ? unsafe.getByte(displacement) != 0 : unsafe.getBoolean(base, displacement)); case Byte: return Constant.forByte(base == null ? unsafe.getByte(displacement) : unsafe.getByte(base, displacement)); case Char: return Constant.forChar(base == null ? unsafe.getChar(displacement) : unsafe.getChar(base, displacement)); case Short: return Constant.forShort(base == null ? unsafe.getShort(displacement) : unsafe.getShort(base, displacement)); case Int: return Constant.forInt(base == null ? unsafe.getInt(displacement) : unsafe.getInt(base, displacement)); case Long: if (displacement == config().hubOffset && runtime.getConfig().useCompressedClassPointers) { if (base == null) { throw new GraalInternalError("Base of object must not be null"); } else { return Constant.forLong(runtime.getCompilerToVM().readUnsafeKlassPointer(base)); } } else { return Constant.forLong(base == null ? unsafe.getLong(displacement) : unsafe.getLong(base, displacement)); } case Float: return Constant.forFloat(base == null ? unsafe.getFloat(displacement) : unsafe.getFloat(base, displacement)); case Double: return Constant.forDouble(base == null ? unsafe.getDouble(displacement) : unsafe.getDouble(base, displacement)); case Object: { Object o = null; if (baseConstant.getKind() == Kind.Object) { o = unsafe.getObject(base, displacement); } else if (baseConstant instanceof HotSpotMetaspaceConstant) { Object metaspaceObject = HotSpotMetaspaceConstant.getMetaspaceObject(baseConstant); if (metaspaceObject instanceof HotSpotResolvedObjectType && initialDisplacement == runtime.getConfig().classMirrorOffset) { o = ((HotSpotResolvedObjectType) metaspaceObject).mirror(); } else { throw GraalInternalError.shouldNotReachHere(); } } else { throw GraalInternalError.shouldNotReachHere(); } return HotSpotObjectConstant.forObject(o); } default: throw GraalInternalError.shouldNotReachHere(); } } @Override public Constant readRawConstant(Kind kind, Constant baseConstant, long initialDisplacement, int bits) { Object base; long displacement; if (baseConstant.getKind() == Kind.Object) { base = HotSpotObjectConstant.asObject(baseConstant); displacement = initialDisplacement; if (base == null) { return null; } } else if (baseConstant.getKind().isNumericInteger()) { long baseLong = baseConstant.asLong(); if (baseLong == 0L) { return null; } displacement = initialDisplacement + baseLong; base = null; } else { throw GraalInternalError.shouldNotReachHere(); } long rawValue; switch (bits) { case 8: rawValue = base == null ? unsafe.getByte(displacement) : unsafe.getByte(base, displacement); break; case 16: rawValue = base == null ? unsafe.getShort(displacement) : unsafe.getShort(base, displacement); break; case 32: rawValue = base == null ? unsafe.getInt(displacement) : unsafe.getInt(base, displacement); break; case 64: rawValue = base == null ? unsafe.getLong(displacement) : unsafe.getLong(base, displacement); break; default: throw GraalInternalError.shouldNotReachHere(); } if (base != null && displacement == config().hubOffset) { if (config().useCompressedClassPointers) { assert bits == 32 && kind == Kind.Int; long klassPointer = config().getKlassEncoding().uncompress((int) rawValue); assert klassPointer == runtime.getCompilerToVM().readUnsafeKlassPointer(base); return HotSpotMetaspaceConstant.forMetaspaceObject(kind, rawValue, HotSpotResolvedObjectType.fromMetaspaceKlass(klassPointer)); } else { assert bits == 64 && kind == Kind.Long; return HotSpotMetaspaceConstant.forMetaspaceObject(kind, rawValue, HotSpotResolvedObjectType.fromMetaspaceKlass(rawValue)); } } else { switch (kind) { case Int: return Constant.forInt((int) rawValue); case Long: return Constant.forLong(rawValue); case Float: return Constant.forFloat(Float.intBitsToFloat((int) rawValue)); case Double: return Constant.forDouble(Double.longBitsToDouble(rawValue)); default: throw GraalInternalError.shouldNotReachHere(); } } } @Override public Constant readArrayElement(Constant array, int index) { if (array.getKind() != Kind.Object || array.isNull()) { return null; } Object a = HotSpotObjectConstant.asObject(array); if (index < 0 || index >= Array.getLength(a)) { return null; } if (a instanceof Object[]) { return HotSpotObjectConstant.forObject(((Object[]) a)[index]); } else { return Constant.forBoxedPrimitive(Array.get(a, index)); } } @Override public Constant boxPrimitive(Constant source) { if (!source.getKind().isPrimitive()) { return null; } return HotSpotObjectConstant.forObject(source.asBoxedPrimitive()); } @Override public Constant unboxPrimitive(Constant source) { if (!source.getKind().isObject()) { return null; } return Constant.forBoxedPrimitive(HotSpotObjectConstant.asObject(source)); } @Override public ResolvedJavaType asJavaType(Constant constant) { if (constant instanceof HotSpotObjectConstant) { Object obj = HotSpotObjectConstant.asObject(constant); if (obj instanceof Class) { return runtime.getHostProviders().getMetaAccess().lookupJavaType((Class<?>) obj); } } if (constant instanceof HotSpotMetaspaceConstant) { Object obj = HotSpotMetaspaceConstant.getMetaspaceObject(constant); if (obj instanceof HotSpotResolvedObjectType) { return (ResolvedJavaType) obj; } } return null; } }