Mercurial > hg > truffle
diff 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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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/types/basic/BasicNarrowOopField.java Sun Apr 13 17:43:42 2008 -0400 @@ -0,0 +1,65 @@ +/* + * 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(); + } +}