Mercurial > hg > truffle
view agent/src/share/classes/sun/jvm/hotspot/runtime/Arguments.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 2004-2006 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.runtime; import java.util.*; import sun.jvm.hotspot.debugger.*; import sun.jvm.hotspot.runtime.*; import sun.jvm.hotspot.types.*; import sun.jvm.hotspot.utilities.*; /** This class represent VM's Arguments class -- command line args, flags etc.*/ public class Arguments { static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } }); } public static String getJVMFlags() { return buildString(jvmFlagsField, jvmFlagsCount); } public static String getJVMArgs() { return buildString(jvmArgsField, jvmArgsCount); } public static String getJavaCommand() { return getString(javaCommandField); } // Internals only below this point // Fields private static AddressField jvmFlagsField; private static AddressField jvmArgsField; private static AddressField javaCommandField; private static long jvmFlagsCount; private static long jvmArgsCount; private static synchronized void initialize(TypeDataBase db) { Type argumentsType = db.lookupType("Arguments"); jvmFlagsField = argumentsType.getAddressField("_jvm_flags_array"); jvmArgsField = argumentsType.getAddressField("_jvm_args_array"); javaCommandField = argumentsType.getAddressField("_java_command"); jvmArgsCount = argumentsType.getCIntegerField("_num_jvm_args").getValue(); jvmFlagsCount = argumentsType.getCIntegerField("_num_jvm_flags").getValue(); } private static String buildString(AddressField arrayField, long count) { StringBuilder sb = new StringBuilder(); if (count > 0) { sb.append(getStringAt(arrayField, 0)); for (long i = 1; i < count; i++) { sb.append(" "); sb.append(getStringAt(arrayField, i)); } } return sb.toString(); } private static String getString(AddressField field) { Address addr = field.getAddress(); return CStringUtilities.getString(addr); } private static String getStringAt(AddressField field, long index) { Address addr = field.getAddress(); return CStringUtilities.getString(addr.getAddressAt(index * VM.getVM().getAddressSize())); } }