| /* |
| * Copyright (c) 2004, 2006, 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.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())); |
| } |
| } |