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view agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeDisassembler.java @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | bc32f286fae0 |
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/* * Copyright 2002 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.interpreter; import java.util.*; import java.lang.reflect.Constructor; import sun.jvm.hotspot.oops.*; import sun.jvm.hotspot.utilities.*; public class BytecodeDisassembler { private Method method; private static Map bytecode2Class = new HashMap(); // Map<int, Class> private static void addBytecodeClass(int bytecode, Class clazz) { bytecode2Class.put(new Integer(bytecode), clazz); } private static Class getBytecodeClass(int bytecode) { return (Class) bytecode2Class.get(new Integer(bytecode)); } static { addBytecodeClass(Bytecodes._anewarray, BytecodeANewArray.class); addBytecodeClass(Bytecodes._bipush, BytecodeBipush.class); addBytecodeClass(Bytecodes._checkcast, BytecodeCheckCast.class); addBytecodeClass(Bytecodes._getfield, BytecodeGetField.class); addBytecodeClass(Bytecodes._getstatic, BytecodeGetStatic.class); addBytecodeClass(Bytecodes._goto, BytecodeGoto.class); addBytecodeClass(Bytecodes._goto_w, BytecodeGotoW.class); addBytecodeClass(Bytecodes._ifeq, BytecodeIf.class); addBytecodeClass(Bytecodes._ifne, BytecodeIf.class); addBytecodeClass(Bytecodes._iflt, BytecodeIf.class); addBytecodeClass(Bytecodes._ifge, BytecodeIf.class); addBytecodeClass(Bytecodes._ifgt, BytecodeIf.class); addBytecodeClass(Bytecodes._ifle, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpeq, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpne, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmplt, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpge, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpgt, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmple, BytecodeIf.class); addBytecodeClass(Bytecodes._if_acmpeq, BytecodeIf.class); addBytecodeClass(Bytecodes._if_acmpne, BytecodeIf.class); addBytecodeClass(Bytecodes._ifnull, BytecodeIf.class); addBytecodeClass(Bytecodes._ifnonnull, BytecodeIf.class); addBytecodeClass(Bytecodes._iinc, BytecodeIinc.class); addBytecodeClass(Bytecodes._instanceof, BytecodeInstanceOf.class); addBytecodeClass(Bytecodes._invokevirtual, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokestatic, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokespecial, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokeinterface, BytecodeInvoke.class); addBytecodeClass(Bytecodes._jsr, BytecodeJsr.class); addBytecodeClass(Bytecodes._jsr_w, BytecodeJsrW.class); addBytecodeClass(Bytecodes._iload, BytecodeLoad.class); addBytecodeClass(Bytecodes._lload, BytecodeLoad.class); addBytecodeClass(Bytecodes._fload, BytecodeLoad.class); addBytecodeClass(Bytecodes._dload, BytecodeLoad.class); addBytecodeClass(Bytecodes._aload, BytecodeLoad.class); addBytecodeClass(Bytecodes._ldc, BytecodeLoadConstant.class); addBytecodeClass(Bytecodes._ldc_w, BytecodeLoadConstant.class); addBytecodeClass(Bytecodes._ldc2_w, BytecodeLoadConstant.class); addBytecodeClass(Bytecodes._lookupswitch, BytecodeLookupswitch.class); addBytecodeClass(Bytecodes._multianewarray, BytecodeMultiANewArray.class); addBytecodeClass(Bytecodes._new, BytecodeNew.class); addBytecodeClass(Bytecodes._newarray, BytecodeNewArray.class); addBytecodeClass(Bytecodes._putfield, BytecodePutField.class); addBytecodeClass(Bytecodes._putstatic, BytecodePutStatic.class); addBytecodeClass(Bytecodes._ret, BytecodeRet.class); addBytecodeClass(Bytecodes._sipush, BytecodeSipush.class); addBytecodeClass(Bytecodes._istore, BytecodeStore.class); addBytecodeClass(Bytecodes._lstore, BytecodeStore.class); addBytecodeClass(Bytecodes._fstore, BytecodeStore.class); addBytecodeClass(Bytecodes._dstore, BytecodeStore.class); addBytecodeClass(Bytecodes._astore, BytecodeStore.class); addBytecodeClass(Bytecodes._tableswitch, BytecodeTableswitch.class); // only special fast_xxx cases. others are handled differently. addBytecodeClass(Bytecodes._fast_iaccess_0, BytecodeFastAAccess0.class); addBytecodeClass(Bytecodes._fast_aaccess_0, BytecodeFastIAccess0.class); } public BytecodeDisassembler(Method method) { this.method = method; } public Method getMethod() { return method; } public void decode(BytecodeVisitor visitor) { visitor.prologue(method); BytecodeStream stream = new BytecodeStream(method); int javacode = Bytecodes._illegal; while ( (javacode = stream.next()) != Bytecodes._illegal) { // look for special Bytecode class int bci = stream.bci(); int hotspotcode = method.getBytecodeOrBPAt(bci); Class clazz = getBytecodeClass(javacode); if (clazz == null) { // check for fast_(i|a)_access_0 clazz = getBytecodeClass(hotspotcode); if (clazz == null) { // use generic bytecode class clazz = Bytecode.class; } } // All bytecode classes must have a constructor with signature // (Lsun/jvm/hotspot/oops/Method;I)V Constructor cstr = null; try { cstr = clazz.getDeclaredConstructor(new Class[] { Method.class, Integer.TYPE }); } catch(NoSuchMethodException nomethod) { if (Assert.ASSERTS_ENABLED) { Assert.that(false, "Bytecode class without proper constructor!"); } } Object bytecodeObj = null; try { bytecodeObj = cstr.newInstance(new Object[] { method, new Integer(bci) }); } catch (Exception exp) { if (Assert.ASSERTS_ENABLED) { Assert.that(false, "Bytecode instance of class " + clazz.getName() + " can not be created!"); } } if (stream.isWide()) { visitor.visit(new Bytecode(method, bci - 1)); } try { visitor.visit((Bytecode) bytecodeObj); } catch(ClassCastException castfail) { if (Assert.ASSERTS_ENABLED) { Assert.that(false, clazz.getName() + " is not derived from Bytecode!"); } } } visitor.epilogue(); } }