1 /* 2 * Copyright (c) 2000, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 package sun.jvm.hotspot.interpreter; 26 27 import java.util.*; 28 import sun.jvm.hotspot.code.*; 29 import sun.jvm.hotspot.debugger.*; 30 import sun.jvm.hotspot.runtime.*; 31 import sun.jvm.hotspot.types.*; 32 33 public class Interpreter { 34 private static AddressField codeField; 35 36 static { VM.registerVMInitializedObserver(new Observer() { public void update(Observable o, Object data) { initialize(VM.getVM().getTypeDataBase()); } })37 VM.registerVMInitializedObserver(new Observer() { 38 public void update(Observable o, Object data) { 39 initialize(VM.getVM().getTypeDataBase()); 40 } 41 }); 42 } 43 initialize(TypeDataBase db)44 private static synchronized void initialize(TypeDataBase db) { 45 Type type = db.lookupType("AbstractInterpreter"); 46 47 codeField = type.getAddressField("_code"); 48 } 49 Interpreter()50 public Interpreter() { 51 } 52 getCode()53 public StubQueue getCode() { 54 Address code = codeField.getValue(); 55 if (code == null) return null; 56 return new StubQueue(code, InterpreterCodelet.class); 57 } 58 contains(Address pc)59 public boolean contains(Address pc) { 60 return getCode().contains(pc); 61 } 62 63 /** Debugging/printing */ getCodeletContaining(Address pc)64 public InterpreterCodelet getCodeletContaining(Address pc) { 65 return (InterpreterCodelet) getCode().getStubContaining(pc); 66 } 67 } 68