Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/interpreter/InterpreterCodelet.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 2000-2004 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.interpreter; import java.io.*; import java.util.*; import sun.jvm.hotspot.code.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; /** An InterpreterCodelet is a piece of interpreter code. All interpreter code is generated into little codelets which contain extra information for debugging and printing purposes. */ public class InterpreterCodelet extends Stub { private static long instanceSize; private static CIntegerField sizeField; // the size in bytes private static AddressField descriptionField; // a description of the codelet, for debugging & printing private static CIntegerField bytecodeField; // associated bytecode if any 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("InterpreterCodelet"); sizeField = type.getCIntegerField("_size"); descriptionField = type.getAddressField("_description"); bytecodeField = type.getCIntegerField("_bytecode"); instanceSize = type.getSize(); } public InterpreterCodelet(Address addr) { super(addr); } public long getSize() { return sizeField.getValue(addr); } public Address codeBegin() { return addr.addOffsetTo(instanceSize); } public Address codeEnd() { return addr.addOffsetTo(getSize()); } public long codeSize() { return codeEnd().minus(codeBegin()); } public String getDescription() { return CStringUtilities.getString(descriptionField.getValue(addr)); } public void verify() { } public void printOn(PrintStream tty) { String desc = getDescription(); if (desc != null) { tty.print(desc); } // FIXME: add printing of bytecode tty.println(" [" + codeBegin() + ", " + codeEnd() + ") " + codeSize() + " bytes "); // FIXME: add disassembly } }