Mercurial > hg > truffle
diff agent/src/share/classes/sun/jvm/hotspot/runtime/Arguments.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/Arguments.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,96 @@ +/* + * 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())); + } +}