Mercurial > hg > graal-compiler
diff agent/src/share/classes/sun/jvm/hotspot/memory/MemRegion.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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/memory/MemRegion.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,172 @@ +/* + * Copyright 2000-2001 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.memory; + +import java.util.*; + +import sun.jvm.hotspot.debugger.*; +import sun.jvm.hotspot.runtime.*; +import sun.jvm.hotspot.types.*; +import sun.jvm.hotspot.utilities.*; + +/** A very simple data structure representing a contigous region of + address space. */ + +public class MemRegion implements Cloneable { + private Address start; + private long byteSize; + + private static AddressField startField; + private static CIntegerField wordSizeField; + + static { + VM.registerVMInitializedObserver(new Observer() { + public void update(Observable o, Object data) { + initialize(VM.getVM().getTypeDataBase()); + } + }); + } + + private static synchronized void initialize(TypeDataBase db) { + Type type = db.lookupType("MemRegion"); + + startField = type.getAddressField("_start"); + wordSizeField = type.getCIntegerField("_word_size"); + } + + public MemRegion() { + } + + /** This constructor takes a "MemRegion*" in the target process */ + public MemRegion(Address memRegionAddr) { + this(startField.getValue(memRegionAddr), + wordSizeField.getValue(memRegionAddr)); + } + + public MemRegion(Address start, long wordSize) { + setStart(start); + setWordSize(wordSize); + } + + public MemRegion(Address start, Address limit) { + setStart(start); + byteSize = limit.minus(start); + } + + public Object clone() { + return new MemRegion(start, byteSize); + } + + public MemRegion copy() { + return (MemRegion) clone(); + } + + public MemRegion intersection(MemRegion mr2) { + MemRegion res = new MemRegion(); + if (AddressOps.gt(mr2.start(), start())) { + res.setStart(mr2.start()); + } else { + res.setStart(start()); + } + Address resEnd; + Address end = end(); + Address mr2End = mr2.end(); + if (AddressOps.lt(end, mr2End)) { + resEnd = end; + } else { + resEnd = mr2End; + } + if (AddressOps.lt(resEnd, res.start())) { + res.setStart(null); + res.setWordSize(0); + } else { + res.setEnd(resEnd); + } + return res; + } + + public MemRegion union(MemRegion mr2) { + MemRegion res = new MemRegion(); + if (AddressOps.lt(mr2.start(), start())) { + res.setStart(mr2.start()); + } else { + res.setStart(start()); + } + Address resEnd; + Address end = end(); + Address mr2End = mr2.end(); + if (AddressOps.gt(end, mr2End)) { + resEnd = end; + } else { + resEnd = mr2End; + } + res.setEnd(resEnd); + return res; + } + + public Address start() { + return start; + } + + public OopHandle startAsOopHandle() { + return start().addOffsetToAsOopHandle(0); + } + + public Address end() { + return start.addOffsetTo(byteSize); + } + + public OopHandle endAsOopHandle() { + return end().addOffsetToAsOopHandle(0); + } + + public void setStart(Address start) { + this.start = start; + } + + public void setEnd(Address end) { + byteSize = end.minus(start); + } + + public void setWordSize(long wordSize) { + byteSize = VM.getVM().getAddressSize() * wordSize; + } + + public boolean contains(MemRegion mr2) { + return AddressOps.lte(start, mr2.start) && AddressOps.gte(end(), mr2.end()); + } + + public boolean contains(Address addr) { + return AddressOps.gte(addr, start()) && AddressOps.lt(addr, end()); + } + + public long byteSize() { + return byteSize; + } + + public long wordSize() { + return byteSize / VM.getVM().getAddressSize(); + } +}