1 /*
   2  * Copyright (c) 2011, 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.meta.Assumptions.AssumptionResult;
  26 import jdk.vm.ci.meta.Constant;
  27 import jdk.vm.ci.meta.ConstantPool;
  28 import jdk.vm.ci.meta.JavaConstant;
  29 import jdk.vm.ci.meta.JavaKind;
  30 import jdk.vm.ci.meta.JavaType;
  31 import jdk.vm.ci.meta.ResolvedJavaField;
  32 import jdk.vm.ci.meta.ResolvedJavaMethod;
  33 import jdk.vm.ci.meta.ResolvedJavaType;
  34 
  35 /**
  36  * Implementation of {@link JavaType} for resolved non-primitive HotSpot classes.
  37  */
  38 public interface HotSpotResolvedObjectType extends ResolvedJavaType {
  39 
  40     /**
  41      * Gets the JVMCI mirror for a {@link Class} object.
  42      *
  43      * @return the {@link HotSpotResolvedJavaType} corresponding to {@code javaClass}
  44      */
  45     static HotSpotResolvedObjectType fromObjectClass(Class<?> javaClass) {
  46         return HotSpotResolvedObjectTypeImpl.fromObjectClass(javaClass);
  47     }
  48 
  49     HotSpotResolvedObjectType getArrayClass();
  50 
  51     ResolvedJavaType getComponentType();
  52 
  53     AssumptionResult<ResolvedJavaType> findLeafConcreteSubtype();
  54 
  55     HotSpotResolvedObjectType getSuperclass();
  56 
  57     HotSpotResolvedObjectType[] getInterfaces();
  58 
  59     HotSpotResolvedObjectType getSupertype();
  60 
  61     HotSpotResolvedObjectType findLeastCommonAncestor(ResolvedJavaType otherType);
  62 
  63     HotSpotResolvedObjectType asExactType();
  64 
  65     default boolean isPrimitive() {
  66         return false;
  67     }
  68 
  69     default JavaKind getJavaKind() {
  70         return JavaKind.Object;
  71     }
  72 
  73     ConstantPool getConstantPool();
  74 
  75     /**
  76      * Gets the instance size of this type. If an instance of this type cannot be fast path
  77      * allocated, then the returned value is negative (its absolute value gives the size). Must not
  78      * be called if this is an array or interface type.
  79      */
  80     int instanceSize();
  81 
  82     int getVtableLength();
  83 
  84     @Override
  85     AssumptionResult<ResolvedJavaMethod> findUniqueConcreteMethod(ResolvedJavaMethod method);
  86 
  87     /**
  88      * Performs a fast-path check that this type is resolved in the context of a given accessing
  89      * class. A negative result does not mean this type is not resolved with respect to
  90      * {@code accessingClass}. That can only be determined by
  91      * {@linkplain HotSpotJVMCIRuntime#lookupType(String, HotSpotResolvedObjectType, boolean)
  92      * re-resolving} the type.
  93      */
  94     boolean isDefinitelyResolvedWithRespectTo(ResolvedJavaType accessingClass);
  95 
  96     /**
  97      * Gets the metaspace Klass boxed in a {@link JavaConstant}.
  98      */
  99     Constant klass();
 100 
 101     boolean isPrimaryType();
 102 
 103     int superCheckOffset();
 104 
 105     long prototypeMarkWord();
 106 
 107     int layoutHelper();
 108 
 109     HotSpotResolvedObjectType getEnclosingType();
 110 
 111     ResolvedJavaMethod getClassInitializer();
 112 
 113     ResolvedJavaField createField(String name, JavaType type, long offset, int modifiers);
 114 }