1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 package jdk.vm.ci.hotspot; 24 25 import jdk.vm.ci.common.*; 26 import jdk.vm.ci.compiler.Compiler; 27 import jdk.vm.ci.meta.*; 28 import jdk.vm.ci.runtime.*; 29 import sun.misc.*; 30 31 //JaCoCo Exclude 32 33 /** 34 * Configuration information for the HotSpot JVMCI runtime. 35 */ 36 public interface HotSpotJVMCIRuntimeProvider extends JVMCIRuntime { 37 38 HotSpotVMConfig getConfig(); 39 40 CompilerToVM getCompilerToVM(); 41 42 Compiler getCompiler(); 43 44 /** 45 * Converts a name to a Java type. This method attempts to resolve {@code name} to a 46 * {@link ResolvedJavaType}. 47 * 48 * @param name a well formed Java type in {@linkplain JavaType#getName() internal} format 49 * @param accessingType the context of resolution which must be non-null 50 * @param resolve specifies whether resolution failure results in an unresolved type being 51 * return or a {@link LinkageError} being thrown 52 * @return a Java type for {@code name} which is guaranteed to be of type 53 * {@link ResolvedJavaType} if {@code resolve == true} 54 * @throws LinkageError if {@code resolve == true} and the resolution failed 55 * @throws NullPointerException if {@code accessingClass} is {@code null} 56 */ 57 JavaType lookupType(String name, HotSpotResolvedObjectType accessingType, boolean resolve); 58 59 /** 60 * Gets the JVMCI mirror for a {@link Class} object. 61 * 62 * @return the {@link ResolvedJavaType} corresponding to {@code javaClass} 63 */ 64 ResolvedJavaType fromClass(Class<?> clazz); 65 66 JVMCIMetaAccessContext getMetaAccessContext(); 67 68 /** 69 * The offset from the origin of an array to the first element. 70 * 71 * @return the offset in bytes 72 */ 73 default int getArrayBaseOffset(JavaKind kind) { 74 switch (kind) { 75 case Boolean: 76 return Unsafe.ARRAY_BOOLEAN_BASE_OFFSET; 77 case Byte: 78 return Unsafe.ARRAY_BYTE_BASE_OFFSET; 79 case Char: 80 return Unsafe.ARRAY_CHAR_BASE_OFFSET; 81 case Short: 82 return Unsafe.ARRAY_SHORT_BASE_OFFSET; 83 case Int: 84 return Unsafe.ARRAY_INT_BASE_OFFSET; 85 case Long: 86 return Unsafe.ARRAY_LONG_BASE_OFFSET; 87 case Float: 88 return Unsafe.ARRAY_FLOAT_BASE_OFFSET; 89 case Double: 90 return Unsafe.ARRAY_DOUBLE_BASE_OFFSET; 91 case Object: 92 return Unsafe.ARRAY_OBJECT_BASE_OFFSET; 93 default: 94 throw new JVMCIError("%s", kind); 95 } 96 } 97 98 /** 99 * The scale used for the index when accessing elements of an array of this kind. 100 * 101 * @return the scale in order to convert the index into a byte offset 102 */ 103 default int getArrayIndexScale(JavaKind kind) { 104 switch (kind) { 105 case Boolean: 106 return Unsafe.ARRAY_BOOLEAN_INDEX_SCALE; 107 case Byte: 108 return Unsafe.ARRAY_BYTE_INDEX_SCALE; 109 case Char: 110 return Unsafe.ARRAY_CHAR_INDEX_SCALE; 111 case Short: 112 return Unsafe.ARRAY_SHORT_INDEX_SCALE; 113 case Int: 114 return Unsafe.ARRAY_INT_INDEX_SCALE; 115 case Long: 116 return Unsafe.ARRAY_LONG_INDEX_SCALE; 117 case Float: 118 return Unsafe.ARRAY_FLOAT_INDEX_SCALE; 119 case Double: 120 return Unsafe.ARRAY_DOUBLE_INDEX_SCALE; 121 case Object: 122 return Unsafe.ARRAY_OBJECT_INDEX_SCALE; 123 default: 124 throw new JVMCIError("%s", kind); 125 } 126 } 127 }