Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/memory/CompactingPermGenGen.java @ 271:818a18cd69a8
6730514: assertion failure in mangling code when expanding by 0 bytes
Summary: An expansion by 0 bytes was not anticipated when the assertion was composed.
Reviewed-by: jjh, jcoomes, apetrusenko
author | jmasa |
---|---|
date | Wed, 30 Jul 2008 11:54:00 -0700 |
parents | a61af66fc99e |
children | c18cbe5936b8 |
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/* * Copyright 2000-2005 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.io.*; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; /** This is the "generation" view of a CompactingPermGen. */ public class CompactingPermGenGen extends OneContigSpaceCardGeneration { private static AddressField unsharedBottomField; private static AddressField unsharedEndField; private static AddressField sharedBottomField; private static AddressField sharedEndField; private static AddressField readOnlyBottomField; private static AddressField readOnlyEndField; private static AddressField readWriteBottomField; private static AddressField readWriteEndField; private static AddressField roSpaceField; private static AddressField rwSpaceField; 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("CompactingPermGenGen"); unsharedBottomField = type.getAddressField("unshared_bottom"); unsharedEndField = type.getAddressField("unshared_end"); sharedBottomField = type.getAddressField("shared_bottom"); sharedEndField = type.getAddressField("shared_end"); readOnlyBottomField = type.getAddressField("readonly_bottom"); readOnlyEndField = type.getAddressField("readonly_end"); readWriteBottomField = type.getAddressField("readwrite_bottom"); readWriteEndField = type.getAddressField("readwrite_end"); roSpaceField = type.getAddressField("_ro_space"); rwSpaceField = type.getAddressField("_rw_space"); } public boolean isSharingEnabled() { return VM.getVM().isSharingEnabled(); } // NEEDS_CLEANUP public CompactingPermGenGen(Address addr) { super(addr); } public OffsetTableContigSpace roSpace() { return newOffsetTableContigSpace(roSpaceField.getValue(addr)); } public OffsetTableContigSpace rwSpace() { return newOffsetTableContigSpace(rwSpaceField.getValue(addr)); } public String name() { return "compacting permanent generation"; } public static Address unsharedBottom() { return unsharedBottomField.getValue(); } public static Address unsharedEnd() { return unsharedEndField.getValue(); } public static Address sharedBottom() { return sharedBottomField.getValue(); } public static Address sharedEnd() { return sharedEndField.getValue(); } public static Address readOnlyBottom() { return readOnlyBottomField.getValue(); } public static Address readOnlyEnd() { return readOnlyEndField.getValue(); } public static Address readWriteBottom() { return readWriteBottomField.getValue(); } public static Address readWriteEnd() { return readWriteEndField.getValue(); } public static boolean isShared(Address p) { return sharedBottom().lessThanOrEqual(p) && sharedEnd().greaterThan(p); } public static boolean isSharedReadOnly(Address p) { return readOnlyBottom().lessThanOrEqual(p) && readOnlyEnd().greaterThan(p); } public static boolean isSharedReadWrite(Address p) { return readWriteBottom().lessThanOrEqual(p) && readWriteEnd().greaterThan(p); } public boolean isIn(Address p) { return unsharedBottom().lessThanOrEqual(p) && sharedEnd().greaterThan(p); } public void spaceIterate(SpaceClosure blk, boolean usedOnly) { super.spaceIterate(blk, usedOnly); if (isSharingEnabled()) { blk.doSpace(roSpace()); blk.doSpace(rwSpace()); } } public void printOn(PrintStream tty) { tty.print(" perm"); theSpace().printOn(tty); if (isSharingEnabled()) { tty.print(" ro space: "); roSpace().printOn(tty); tty.print(", rw space: "); rwSpace().printOn(tty); } } private OffsetTableContigSpace newOffsetTableContigSpace(Address addr) { return (OffsetTableContigSpace) VMObjectFactory.newObject( OffsetTableContigSpace.class, addr); } }