Mercurial > hg > truffle
view graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/MetaAccessProvider.java @ 12045:0fc653a9e019
made GraalCodeCacheProvider independent of CodeCacheProvider and renamed the former to LoweringProvider (GRAAL-511)
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 10 Oct 2013 20:50:54 +0200 |
parents | 0e2cceed1caf |
children | 0afe7370260c |
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/* * Copyright (c) 2012, 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.api.meta; import java.lang.reflect.*; /** * Provides access to the metadata of a class typically provided in a class file. */ public interface MetaAccessProvider { /** * Returns the resolved Java type representing a given Java class. * * @param clazz the Java class object * @return the resolved Java type object */ ResolvedJavaType lookupJavaType(Class<?> clazz); /** * Provides the {@link ResolvedJavaMethod} for a {@link Method} obtained via reflection. */ ResolvedJavaMethod lookupJavaMethod(Method reflectionMethod); /** * Provides the {@link ResolvedJavaMethod} for a {@link Constructor} obtained via reflection. */ ResolvedJavaMethod lookupJavaConstructor(Constructor reflectionConstructor); /** * Provides the {@link ResolvedJavaField} for a {@link Field} obtained via reflection. */ ResolvedJavaField lookupJavaField(Field reflectionField); /** * Returns the resolved Java type of the given {@link Constant} object. * * @return {@code null} if {@code constant.isNull() || !constant.kind.isObject()} */ ResolvedJavaType lookupJavaType(Constant constant); /** * Parses a <a * href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">method * descriptor</a> into a {@link Signature}. The behavior of this method is undefined if the * method descriptor is not well formed. */ Signature parseMethodDescriptor(String methodDescriptor); /** * Compares two constants for equality. This is used instead of {@link Constant#equals(Object)} * in case the runtime has an interpretation for object equality other than * {@code x.asObject() == y.asObject()}. For primitive constants, this is equivalent to calling * {@code x.equals(y)}. The equality relationship is symmetric. * * @return {@code true} if the two parameters represent the same runtime object, {@code false} * otherwise */ boolean constantEquals(Constant x, Constant y); /** * Returns the length of an array that is wrapped in a {@link Constant} object. If {@code array} * is not an array, or the array length is not available at this point, the return value is * {@code null}. */ Integer lookupArrayLength(Constant array); /** * Reads a value of this kind using a base address and a displacement. * * @param base the base address from which the value is read * @param displacement the displacement within the object in bytes * @param compressible whether this is a read of a compressed or an uncompressed pointer * @return the read value encapsulated in a {@link Constant} object, or {@code null} if the * value cannot be read. */ Constant readUnsafeConstant(Kind kind, Object base, long displacement, boolean compressible); /** * Determines if a given foreign call is side-effect free. Deoptimization cannot return * execution to a point before a foreign call that has a side effect. */ boolean isReexecutable(ForeignCallDescriptor descriptor); /** * Gets the set of memory locations killed by a given foreign call. Returning the special value * {@link LocationIdentity#ANY_LOCATION} denotes that the call kills all memory locations. * Returning any empty array denotes that the call does not kill any memory locations. */ LocationIdentity[] getKilledLocations(ForeignCallDescriptor descriptor); /** * Determines if deoptimization can occur during a given foreign call. */ boolean canDeoptimize(ForeignCallDescriptor descriptor); /** * Encodes a deoptimization action and a deoptimization reason in an integer value. * * @return the encoded value as an integer */ Constant encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason); }