Mercurial > hg > graal-compiler
view agent/src/share/classes/sun/jvm/hotspot/types/basic/BasicNarrowOopField.java @ 113:ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold
author | coleenp |
---|---|
date | Sun, 13 Apr 2008 17:43:42 -0400 |
parents | |
children | c18cbe5936b8 |
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/* * Copyright 2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ package sun.jvm.hotspot.types.basic; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.types.*; /** A specialization of BasicField which represents a field containing an oop value and which adds typechecked getValue() routines returning OopHandles. */ public class BasicNarrowOopField extends BasicOopField implements NarrowOopField { private static final boolean DEBUG = false; public BasicNarrowOopField (OopField oopf) { super(oopf); } public BasicNarrowOopField(BasicTypeDataBase db, Type containingType, String name, Type type, boolean isStatic, long offset, Address staticFieldAddress) { super(db, containingType, name, type, isStatic, offset, staticFieldAddress); if (DEBUG) { System.out.println(" name " + name + " type " + type + " isStatic " + isStatic + " offset " + offset + " static addr " + staticFieldAddress); } if (!type.isOopType()) { throw new WrongTypeException("Type of a BasicOopField must be an oop type"); } } /** The field must be nonstatic and the type of the field must be a Java oop, or a WrongTypeException will be thrown. */ public OopHandle getValue(Address addr) throws UnmappedAddressException, UnalignedAddressException, WrongTypeException { return getNarrowOopHandle(addr); } /** The field must be static and the type of the field must be a Java oop, or a WrongTypeException will be thrown. */ public OopHandle getValue() throws UnmappedAddressException, UnalignedAddressException, WrongTypeException { return getNarrowOopHandle(); } }