Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/MetaAccessProvider.java @ 21591:6c5327245831
LinearScan: fix intervals context.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Fri, 29 May 2015 10:59:03 +0200 |
parents | 48c1ebd24120 |
children |
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/* * Copyright (c) 2012, 2014, 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.jvmci.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); /** * Returns the resolved Java types representing some given Java classes. * * @param classes the Java class objects * @return the resolved Java type objects */ default ResolvedJavaType[] lookupJavaTypes(Class<?>[] classes) { ResolvedJavaType[] result = new ResolvedJavaType[classes.length]; for (int i = 0; i < result.length; i++) { result[i] = lookupJavaType(classes[i]); } return result; } /** * Provides the {@link ResolvedJavaMethod} for a {@link Method} or {@link Constructor} obtained * via reflection. */ ResolvedJavaMethod lookupJavaMethod(Executable reflectionMethod); /** * Provides the {@link ResolvedJavaField} for a {@link Field} obtained via reflection. */ ResolvedJavaField lookupJavaField(Field reflectionField); /** * Returns the resolved Java type of the given {@link JavaConstant} object. * * @return {@code null} if {@code constant.isNull() || !constant.kind.isObject()} */ ResolvedJavaType lookupJavaType(JavaConstant constant); /** * Returns the number of bytes occupied by this constant value or constant object. * * @param constant the constant whose bytes should be measured * @return the number of bytes occupied by this constant */ long getMemorySize(JavaConstant 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); /** * Encodes a deoptimization action and a deoptimization reason in an integer value. * * @param debugId an integer that can be used to track the origin of a deoptimization at * runtime. There is no guarantee that the runtime will use this value. The runtime * may even keep fewer than 32 bits. * * @return the encoded value as an integer */ JavaConstant encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason, int debugId); DeoptimizationReason decodeDeoptReason(JavaConstant constant); DeoptimizationAction decodeDeoptAction(JavaConstant constant); int decodeDebugId(JavaConstant constant); }