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annotate graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/MetaAccessProvider.java @ 21556:48c1ebd24120

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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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1 /*
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2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.jvmci.meta;
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24
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25 import java.lang.reflect.*;
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26
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27 /**
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28 * Provides access to the metadata of a class typically provided in a class file.
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29 */
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30 public interface MetaAccessProvider {
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31
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32 /**
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33 * Returns the resolved Java type representing a given Java class.
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34 *
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35 * @param clazz the Java class object
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36 * @return the resolved Java type object
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37 */
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38 ResolvedJavaType lookupJavaType(Class<?> clazz);
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39
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40 /**
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41 * Returns the resolved Java types representing some given Java classes.
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42 *
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43 * @param classes the Java class objects
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44 * @return the resolved Java type objects
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45 */
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46 default ResolvedJavaType[] lookupJavaTypes(Class<?>[] classes) {
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47 ResolvedJavaType[] result = new ResolvedJavaType[classes.length];
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48 for (int i = 0; i < result.length; i++) {
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49 result[i] = lookupJavaType(classes[i]);
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50 }
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51 return result;
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52 }
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54 /**
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55 * Provides the {@link ResolvedJavaMethod} for a {@link Method} or {@link Constructor} obtained
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56 * via reflection.
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57 */
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58 ResolvedJavaMethod lookupJavaMethod(Executable reflectionMethod);
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59
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60 /**
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61 * Provides the {@link ResolvedJavaField} for a {@link Field} obtained via reflection.
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62 */
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63 ResolvedJavaField lookupJavaField(Field reflectionField);
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65 /**
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66 * Returns the resolved Java type of the given {@link JavaConstant} object.
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67 *
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68 * @return {@code null} if {@code constant.isNull() || !constant.kind.isObject()}
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69 */
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70 ResolvedJavaType lookupJavaType(JavaConstant constant);
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72 /**
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73 * Returns the number of bytes occupied by this constant value or constant object.
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74 *
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75 * @param constant the constant whose bytes should be measured
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76 * @return the number of bytes occupied by this constant
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77 */
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78 long getMemorySize(JavaConstant constant);
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80 /**
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81 * Parses a <a
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82 * href="http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.3.3">method
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83 * descriptor</a> into a {@link Signature}. The behavior of this method is undefined if the
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84 * method descriptor is not well formed.
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85 */
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86 Signature parseMethodDescriptor(String methodDescriptor);
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87
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88 /**
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89 * Encodes a deoptimization action and a deoptimization reason in an integer value.
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90 *
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91 * @param debugId an integer that can be used to track the origin of a deoptimization at
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92 * runtime. There is no guarantee that the runtime will use this value. The runtime
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93 * may even keep fewer than 32 bits.
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94 *
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95 * @return the encoded value as an integer
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96 */
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97 JavaConstant encodeDeoptActionAndReason(DeoptimizationAction action, DeoptimizationReason reason, int debugId);
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98
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99 DeoptimizationReason decodeDeoptReason(JavaConstant constant);
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100
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101 DeoptimizationAction decodeDeoptAction(JavaConstant constant);
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102
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103 int decodeDebugId(JavaConstant constant);
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104 }