Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.meta/src/com/oracle/jvmci/meta/ResolvedJavaType.java @ 21591:6c5327245831
LinearScan: fix intervals context.
author | Josef Eisl <josef.eisl@jku.at> |
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date | Fri, 29 May 2015 10:59:03 +0200 |
parents | 48c1ebd24120 |
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/* * Copyright (c) 2009, 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.annotation.*; import java.net.*; import com.oracle.jvmci.meta.Assumptions.AssumptionResult; /** * Represents a resolved Java type. Types include primitives, objects, {@code void}, and arrays * thereof. Types, like fields and methods, are resolved through {@link ConstantPool constant pools} * . */ public interface ResolvedJavaType extends JavaType, ModifiersProvider { /** * Gets the runtime representation of the Java class object of this type. */ JavaConstant getJavaClass(); /** * Gets the runtime representation of the "hub" of this type--that is, the closest part of the * type representation which is typically stored in the object header. */ Constant getObjectHub(); /** * Checks whether this type has a finalizer method. * * @return {@code true} if this class has a finalizer */ boolean hasFinalizer(); /** * Checks whether this type has any finalizable subclasses so far. Any decisions based on this * information require the registration of a dependency, since this information may change. * * @return {@code true} if this class has any subclasses with finalizers */ AssumptionResult<Boolean> hasFinalizableSubclass(); /** * Checks whether this type is an interface. * * @return {@code true} if this type is an interface */ boolean isInterface(); /** * Checks whether this type is an instance class. * * @return {@code true} if this type is an instance class */ boolean isInstanceClass(); /** * Checks whether this type is an array class. * * @return {@code true} if this type is an array class */ boolean isArray(); /** * Checks whether this type is primitive. * * @return {@code true} if this type is primitive */ boolean isPrimitive(); /** * {@inheritDoc} * <p> * Only the flags specified in the JVM specification will be included in the returned mask. This * method is identical to {@link Class#getModifiers()} in terms of the value return for this * type. */ int getModifiers(); /** * Checks whether this type is initialized. If a type is initialized it implies that it was * {@link #isLinked() linked} and that the static initializer has run. * * @return {@code true} if this type is initialized */ boolean isInitialized(); /** * Initializes this type. */ void initialize(); /** * Checks whether this type is linked and verified. When a type is linked the static initializer * has not necessarily run. An {@link #isInitialized() initialized} type is always linked. * * @return {@code true} if this type is linked */ boolean isLinked(); /** * Determines if this type is either the same as, or is a superclass or superinterface of, the * type represented by the specified parameter. This method is identical to * {@link Class#isAssignableFrom(Class)} in terms of the value return for this type. */ boolean isAssignableFrom(ResolvedJavaType other); /** * Returns true if this type is exactly the type {@link java.lang.Object}. */ default boolean isJavaLangObject() { // Removed assertion due to https://bugs.eclipse.org/bugs/show_bug.cgi?id=434442 return getSuperclass() == null && !isInterface() && getKind() == Kind.Object; } /** * Checks whether the specified object is an instance of this type. * * @param obj the object to test * @return {@code true} if the object is an instance of this type */ boolean isInstance(JavaConstant obj); /** * Returns this type if it is an exact type otherwise returns null. This type is exact if it is * void, primitive, final, or an array of a final or primitive type. * * @return this type if it is exact; {@code null} otherwise */ ResolvedJavaType asExactType(); /** * Gets the super class of this type. If this type represents either the {@code Object} class, * an interface, a primitive type, or void, then null is returned. If this object represents an * array class then the type object representing the {@code Object} class is returned. */ ResolvedJavaType getSuperclass(); /** * Gets the interfaces implemented or extended by this type. This method is analogous to * {@link Class#getInterfaces()} and as such, only returns the interfaces directly implemented * or extended by this type. */ ResolvedJavaType[] getInterfaces(); /** * Gets the single implementor of this type. Calling this method on a non-interface type causes * an exception. * <p> * If the compiler uses the result of this method for its compilation, the usage must be guarded * because the verifier can not guarantee that the assigned type really implements this * interface. Additionally, class loading can invalidate the result of this method. * * @return {@code null} if there is no implementor, the implementor if there is only one, or * {@code this} if there are more than one. */ ResolvedJavaType getSingleImplementor(); /** * Walks the class hierarchy upwards and returns the least common class that is a superclass of * both the current and the given type. * * @return the least common type that is a super type of both the current and the given type, or * {@code null} if primitive types are involved. */ ResolvedJavaType findLeastCommonAncestor(ResolvedJavaType otherType); /** * Attempts to get a leaf concrete subclass of this type. * <p> * For an {@linkplain #isArray() array} type A, the leaf concrete subclass is A if the * {@linkplain #getElementalType() elemental} type of A is final (which includes primitive * types). Otherwise {@code null} is returned for A. * <p> * For a non-array type T, the result is the leaf concrete type in the current hierarchy of T. * <p> * A runtime may decide not to manage or walk a large hierarchy and so the result is * conservative. That is, a non-null result is guaranteed to be the leaf concrete class in T's * hierarchy <b>at the current point in time</b> but a null result does not necessarily imply * that there is no leaf concrete class in T's hierarchy. * <p> * If the compiler uses the result of this method for its compilation, it must register the * {@link AssumptionResult} in its {@link Assumptions} because dynamic class loading can * invalidate the result of this method. * * @return an {@link AssumptionResult} containing the leaf concrete subclass for this type as * described above */ AssumptionResult<ResolvedJavaType> findLeafConcreteSubtype(); ResolvedJavaType getComponentType(); default ResolvedJavaType getElementalType() { ResolvedJavaType t = this; while (t.isArray()) { t = t.getComponentType(); } return t; } ResolvedJavaType getArrayClass(); /** * Resolves the method implementation for virtual dispatches on objects of this dynamic type. * This resolution process only searches "up" the class hierarchy of this type. * * @param method the method to select the implementation of * @param callerType the caller or context type used to perform access checks * @param includeAbstract whether abstract methods should be returned. If it is {@code false} * this method behaves like {@link #resolveConcreteMethod}. This is just a temporary * parameter to highlight the changed semantics of this method. TODO (je) remove this * flag. * @return the link-time resolved method (might be abstract) or {@code null} if it can not be * linked */ ResolvedJavaMethod resolveMethod(ResolvedJavaMethod method, ResolvedJavaType callerType, boolean includeAbstract); /** * Resolves the method implementation for virtual dispatches on objects of this dynamic type. * This resolution process only searches "up" the class hierarchy of this type. A broader search * that also walks "down" the hierarchy is implemented by * {@link #findUniqueConcreteMethod(ResolvedJavaMethod)}. * * @param method the method to select the implementation of * @param callerType the caller or context type used to perform access checks * @return the concrete method that would be selected at runtime, or {@code null} if there is no * concrete implementation of {@code method} in this type or any of its superclasses */ ResolvedJavaMethod resolveConcreteMethod(ResolvedJavaMethod method, ResolvedJavaType callerType); /** * Given a {@link ResolvedJavaMethod} A, returns a concrete {@link ResolvedJavaMethod} B that is * the only possible unique target for a virtual call on A(). Returns {@code null} if either no * such concrete method or more than one such method exists. Returns the method A if A is a * concrete method that is not overridden. * <p> * If the compiler uses the result of this method for its compilation, it must register an * assumption because dynamic class loading can invalidate the result of this method. * * @param method the method A for which a unique concrete target is searched * @return the unique concrete target or {@code null} if no such target exists or assumptions * are not supported by this runtime */ AssumptionResult<ResolvedJavaMethod> findUniqueConcreteMethod(ResolvedJavaMethod method); /** * Returns the instance fields of this class, including * {@linkplain ResolvedJavaField#isInternal() internal} fields. A zero-length array is returned * for array and primitive types. The order of fields returned by this method is stable. That * is, for a single JVM execution the same order is returned each time this method is called. It * is also the "natural" order, which means that the JVM would expect the fields in this order * if no specific order is given. * * @param includeSuperclasses if true, then instance fields for the complete hierarchy of this * type are included in the result * @return an array of instance fields */ ResolvedJavaField[] getInstanceFields(boolean includeSuperclasses); /** * Returns the static fields of this class, including * {@linkplain ResolvedJavaField#isInternal() internal} fields. A zero-length array is returned * for array and primitive types. The order of fields returned by this method is stable. That * is, for a single JVM execution the same order is returned each time this method is called. */ ResolvedJavaField[] getStaticFields(); /** * Returns the annotation for the specified type of this class, if such an annotation is * present. * * @param annotationClass the Class object corresponding to the annotation type * @return this element's annotation for the specified annotation type if present on this class, * else {@code null} */ <T extends Annotation> T getAnnotation(Class<T> annotationClass); /** * Returns the instance field of this class (or one of its super classes) at the given offset, * or {@code null} if there is no such field. * * @param offset the offset of the field to look for * @return the field with the given offset, or {@code null} if there is no such field. */ ResolvedJavaField findInstanceFieldWithOffset(long offset, Kind expectedKind); /** * Returns name of source file of this type. */ String getSourceFileName(); /** * Returns the class file path - if available - of this type, or {@code null}. */ URL getClassFilePath(); /** * Returns {@code true} if the type is a local type. */ boolean isLocal(); /** * Returns {@code true} if the type is a member type. */ boolean isMember(); /** * Returns the enclosing type of this type, if it exists, or {@code null}. */ ResolvedJavaType getEnclosingType(); /** * Returns an array reflecting all the constructors declared by this type. This method is * similar to {@link Class#getDeclaredConstructors()} in terms of returned constructors. */ ResolvedJavaMethod[] getDeclaredConstructors(); /** * Returns an array reflecting all the methods declared by this type. This method is similar to * {@link Class#getDeclaredMethods()} in terms of returned methods. */ ResolvedJavaMethod[] getDeclaredMethods(); /** * Returns the {@code <clinit>} method for this class if there is one. */ ResolvedJavaMethod getClassInitializer(); /** * Returns true if this type represents an interface and it should be trusted even in places * where the JVM verifier would not give any guarantees other than {@link Object}. */ boolean isTrustedInterfaceType(); }