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