Mercurial > hg > truffle
diff graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/MetaAccessProvider.java @ 21556:48c1ebd24120
renamed com.oracle.graal.api[meta|code] modules to com.oracle.jvmci.[meta|code] (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Wed, 27 May 2015 00:36:16 +0200 |
parents | graal/com.oracle.graal.api.meta/src/com/oracle/graal/api/meta/MetaAccessProvider.java@2906b3cc3e2f |
children |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/MetaAccessProvider.java Wed May 27 00:36:16 2015 +0200 @@ -0,0 +1,104 @@ +/* + * 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); +}