Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/gc_interface/CollectedHeap.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 2000, 2005, 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 sun.jvm.hotspot.gc_interface; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.memory.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; public class CollectedHeap extends VMObject { private static long reservedFieldOffset; 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("CollectedHeap"); reservedFieldOffset = type.getField("_reserved").getOffset(); } public CollectedHeap(Address addr) { super(addr); } /** Returns the lowest address of the heap. */ public Address start() { return reservedRegion().start(); } public long capacity() { return 0; } public long used() { return 0; } public MemRegion reservedRegion() { return new MemRegion(addr.addOffsetTo(reservedFieldOffset)); } public boolean isIn(Address a) { return isInReserved(a); } public boolean isInReserved(Address a) { return reservedRegion().contains(a); } public CollectedHeapName kind() { return CollectedHeapName.ABSTRACT; } public void print() { printOn(System.out); } public void printOn(PrintStream tty) { MemRegion mr = reservedRegion(); tty.println("unknown subtype of CollectedHeap @ " + getAddress() + " (" + mr.start() + "," + mr.end() + ")"); } }