| /* |
| * 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.code; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.runtime.*; |
| |
| /** ScopeDescs contain the information that makes source-level |
| debugging of nmethods possible; each scopeDesc describes a method |
| activation */ |
| |
| public class ScopeDesc { |
| /** NMethod information */ |
| private NMethod code; |
| private Method method; |
| private int bci; |
| /** Decoding offsets */ |
| private int decodeOffset; |
| private int senderDecodeOffset; |
| private int localsDecodeOffset; |
| private int expressionsDecodeOffset; |
| private int monitorsDecodeOffset; |
| |
| public ScopeDesc(NMethod code, int decodeOffset) { |
| this.code = code; |
| this.decodeOffset = decodeOffset; |
| |
| // Decode header |
| DebugInfoReadStream stream = streamAt(decodeOffset); |
| |
| senderDecodeOffset = stream.readInt(); |
| method = (Method) VM.getVM().getObjectHeap().newOop(stream.readOopHandle()); |
| bci = stream.readBCI(); |
| // Decode offsets for body and sender |
| localsDecodeOffset = stream.readInt(); |
| expressionsDecodeOffset = stream.readInt(); |
| monitorsDecodeOffset = stream.readInt(); |
| } |
| |
| public NMethod getNMethod() { return code; } |
| public Method getMethod() { return method; } |
| public int getBCI() { return bci; } |
| |
| /** Returns a List<ScopeValue> */ |
| public List getLocals() { |
| return decodeScopeValues(localsDecodeOffset); |
| } |
| |
| /** Returns a List<ScopeValue> */ |
| public List getExpressions() { |
| return decodeScopeValues(expressionsDecodeOffset); |
| } |
| |
| /** Returns a List<MonitorValue> */ |
| public List getMonitors() { |
| return decodeMonitorValues(monitorsDecodeOffset); |
| } |
| |
| /** Stack walking. Returns null if this is the outermost scope. */ |
| public ScopeDesc sender() { |
| if (isTop()) { |
| return null; |
| } |
| |
| return new ScopeDesc(code, senderDecodeOffset); |
| } |
| |
| /** Returns where the scope was decoded */ |
| public int getDecodeOffset() { |
| return decodeOffset; |
| } |
| |
| /** Tells whether sender() returns null */ |
| public boolean isTop() { |
| return (senderDecodeOffset == DebugInformationRecorder.SERIALIZED_NULL); |
| } |
| |
| public boolean equals(Object arg) { |
| if (arg == null) { |
| return false; |
| } |
| |
| if (!(arg instanceof ScopeDesc)) { |
| return false; |
| } |
| |
| ScopeDesc sd = (ScopeDesc) arg; |
| |
| return (sd.method.equals(method) && (sd.bci == bci)); |
| } |
| |
| public void printValue() { |
| printValueOn(System.out); |
| } |
| |
| public void printValueOn(PrintStream tty) { |
| tty.print("ScopeDesc for "); |
| method.printValueOn(tty); |
| tty.println(" @bci " + bci); |
| } |
| |
| // FIXME: add more accessors |
| |
| //-------------------------------------------------------------------------------- |
| // Internals only below this point |
| // |
| |
| private DebugInfoReadStream streamAt(int decodeOffset) { |
| return new DebugInfoReadStream(code, decodeOffset); |
| } |
| |
| /** Returns a List<ScopeValue> or null if no values were present */ |
| private List decodeScopeValues(int decodeOffset) { |
| if (decodeOffset == DebugInformationRecorder.SERIALIZED_NULL) { |
| return null; |
| } |
| DebugInfoReadStream stream = streamAt(decodeOffset); |
| int length = stream.readInt(); |
| List res = new ArrayList(length); |
| for (int i = 0; i < length; i++) { |
| res.add(ScopeValue.readFrom(stream)); |
| } |
| return res; |
| } |
| |
| /** Returns a List<MonitorValue> or null if no values were present */ |
| private List decodeMonitorValues(int decodeOffset) { |
| if (decodeOffset == DebugInformationRecorder.SERIALIZED_NULL) { |
| return null; |
| } |
| DebugInfoReadStream stream = streamAt(decodeOffset); |
| int length = stream.readInt(); |
| List res = new ArrayList(length); |
| for (int i = 0; i < length; i++) { |
| res.add(new MonitorValue(stream)); |
| } |
| return res; |
| } |
| } |