Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/SharedHeap.java @ 4670:41034914e2ee
add MethodContents assumption to fix debbugging issue
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Wed, 22 Feb 2012 17:04:27 +0100 |
parents | c18cbe5936b8 |
children | da91efe96a93 |
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/* * Copyright (c) 2002, 2003, 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.memory; import java.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.gc_interface.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; public abstract class SharedHeap extends CollectedHeap { private static AddressField permGenField; private static VirtualConstructor ctor; 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("SharedHeap"); permGenField = type.getAddressField("_perm_gen"); ctor = new VirtualConstructor(db); ctor.addMapping("CompactingPermGen", CompactingPermGen.class); ctor.addMapping("CMSPermGen", CMSPermGen.class); } public SharedHeap(Address addr) { super(addr); } /** These functions return the "permanent" generation, in which reflective objects are allocated and stored. Two versions, the second of which returns the view of the perm gen as a generation. (FIXME: this distinction is strange and seems unnecessary, and should be cleaned up.) */ public PermGen perm() { return (PermGen) ctor.instantiateWrapperFor(permGenField.getValue(addr)); } public CollectedHeapName kind() { return CollectedHeapName.SHARED_HEAP; } public Generation permGen() { return perm().asGen(); } }