1 /* 2 * Copyright (c) 2002, 2020, 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 java.lang.reflect.Constructor; 29 import sun.jvm.hotspot.oops.*; 30 import sun.jvm.hotspot.utilities.*; 31 32 public class BytecodeDisassembler { 33 private Method method; 34 35 private static Map<Integer, Class> bytecode2Class = new HashMap<>(); 36 addBytecodeClass(int bytecode, Class clazz)37 private static void addBytecodeClass(int bytecode, Class clazz) { 38 bytecode2Class.put(bytecode, clazz); 39 } 40 getBytecodeClass(int bytecode)41 private static Class getBytecodeClass(int bytecode) { 42 return (Class) bytecode2Class.get(bytecode); 43 } 44 45 static { addBytecodeClass(Bytecodes._anewarray, BytecodeANewArray.class)46 addBytecodeClass(Bytecodes._anewarray, BytecodeANewArray.class); addBytecodeClass(Bytecodes._bipush, BytecodeBipush.class)47 addBytecodeClass(Bytecodes._bipush, BytecodeBipush.class); addBytecodeClass(Bytecodes._checkcast, BytecodeCheckCast.class)48 addBytecodeClass(Bytecodes._checkcast, BytecodeCheckCast.class); addBytecodeClass(Bytecodes._getfield, BytecodeGetField.class)49 addBytecodeClass(Bytecodes._getfield, BytecodeGetField.class); addBytecodeClass(Bytecodes._getstatic, BytecodeGetStatic.class)50 addBytecodeClass(Bytecodes._getstatic, BytecodeGetStatic.class); addBytecodeClass(Bytecodes._goto, BytecodeGoto.class)51 addBytecodeClass(Bytecodes._goto, BytecodeGoto.class); addBytecodeClass(Bytecodes._goto_w, BytecodeGotoW.class)52 addBytecodeClass(Bytecodes._goto_w, BytecodeGotoW.class); addBytecodeClass(Bytecodes._ifeq, BytecodeIf.class)53 addBytecodeClass(Bytecodes._ifeq, BytecodeIf.class); addBytecodeClass(Bytecodes._ifne, BytecodeIf.class)54 addBytecodeClass(Bytecodes._ifne, BytecodeIf.class); addBytecodeClass(Bytecodes._iflt, BytecodeIf.class)55 addBytecodeClass(Bytecodes._iflt, BytecodeIf.class); addBytecodeClass(Bytecodes._ifge, BytecodeIf.class)56 addBytecodeClass(Bytecodes._ifge, BytecodeIf.class); addBytecodeClass(Bytecodes._ifgt, BytecodeIf.class)57 addBytecodeClass(Bytecodes._ifgt, BytecodeIf.class); addBytecodeClass(Bytecodes._ifle, BytecodeIf.class)58 addBytecodeClass(Bytecodes._ifle, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpeq, BytecodeIf.class)59 addBytecodeClass(Bytecodes._if_icmpeq, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpne, BytecodeIf.class)60 addBytecodeClass(Bytecodes._if_icmpne, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmplt, BytecodeIf.class)61 addBytecodeClass(Bytecodes._if_icmplt, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpge, BytecodeIf.class)62 addBytecodeClass(Bytecodes._if_icmpge, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmpgt, BytecodeIf.class)63 addBytecodeClass(Bytecodes._if_icmpgt, BytecodeIf.class); addBytecodeClass(Bytecodes._if_icmple, BytecodeIf.class)64 addBytecodeClass(Bytecodes._if_icmple, BytecodeIf.class); addBytecodeClass(Bytecodes._if_acmpeq, BytecodeIf.class)65 addBytecodeClass(Bytecodes._if_acmpeq, BytecodeIf.class); addBytecodeClass(Bytecodes._if_acmpne, BytecodeIf.class)66 addBytecodeClass(Bytecodes._if_acmpne, BytecodeIf.class); addBytecodeClass(Bytecodes._ifnull, BytecodeIf.class)67 addBytecodeClass(Bytecodes._ifnull, BytecodeIf.class); addBytecodeClass(Bytecodes._ifnonnull, BytecodeIf.class)68 addBytecodeClass(Bytecodes._ifnonnull, BytecodeIf.class); addBytecodeClass(Bytecodes._iinc, BytecodeIinc.class)69 addBytecodeClass(Bytecodes._iinc, BytecodeIinc.class); addBytecodeClass(Bytecodes._instanceof, BytecodeInstanceOf.class)70 addBytecodeClass(Bytecodes._instanceof, BytecodeInstanceOf.class); addBytecodeClass(Bytecodes._invokevirtual, BytecodeInvoke.class)71 addBytecodeClass(Bytecodes._invokevirtual, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokestatic, BytecodeInvoke.class)72 addBytecodeClass(Bytecodes._invokestatic, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokespecial, BytecodeInvoke.class)73 addBytecodeClass(Bytecodes._invokespecial, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokeinterface, BytecodeInvoke.class)74 addBytecodeClass(Bytecodes._invokeinterface, BytecodeInvoke.class); addBytecodeClass(Bytecodes._invokedynamic, BytecodeInvoke.class)75 addBytecodeClass(Bytecodes._invokedynamic, BytecodeInvoke.class); addBytecodeClass(Bytecodes._jsr, BytecodeJsr.class)76 addBytecodeClass(Bytecodes._jsr, BytecodeJsr.class); addBytecodeClass(Bytecodes._jsr_w, BytecodeJsrW.class)77 addBytecodeClass(Bytecodes._jsr_w, BytecodeJsrW.class); addBytecodeClass(Bytecodes._iload, BytecodeLoad.class)78 addBytecodeClass(Bytecodes._iload, BytecodeLoad.class); addBytecodeClass(Bytecodes._lload, BytecodeLoad.class)79 addBytecodeClass(Bytecodes._lload, BytecodeLoad.class); addBytecodeClass(Bytecodes._fload, BytecodeLoad.class)80 addBytecodeClass(Bytecodes._fload, BytecodeLoad.class); addBytecodeClass(Bytecodes._dload, BytecodeLoad.class)81 addBytecodeClass(Bytecodes._dload, BytecodeLoad.class); addBytecodeClass(Bytecodes._aload, BytecodeLoad.class)82 addBytecodeClass(Bytecodes._aload, BytecodeLoad.class); addBytecodeClass(Bytecodes._ldc, BytecodeLoadConstant.class)83 addBytecodeClass(Bytecodes._ldc, BytecodeLoadConstant.class); addBytecodeClass(Bytecodes._ldc_w, BytecodeLoadConstant.class)84 addBytecodeClass(Bytecodes._ldc_w, BytecodeLoadConstant.class); addBytecodeClass(Bytecodes._ldc2_w, BytecodeLoadConstant.class)85 addBytecodeClass(Bytecodes._ldc2_w, BytecodeLoadConstant.class); addBytecodeClass(Bytecodes._lookupswitch, BytecodeLookupswitch.class)86 addBytecodeClass(Bytecodes._lookupswitch, BytecodeLookupswitch.class); addBytecodeClass(Bytecodes._multianewarray, BytecodeMultiANewArray.class)87 addBytecodeClass(Bytecodes._multianewarray, BytecodeMultiANewArray.class); addBytecodeClass(Bytecodes._new, BytecodeNew.class)88 addBytecodeClass(Bytecodes._new, BytecodeNew.class); addBytecodeClass(Bytecodes._newarray, BytecodeNewArray.class)89 addBytecodeClass(Bytecodes._newarray, BytecodeNewArray.class); addBytecodeClass(Bytecodes._putfield, BytecodePutField.class)90 addBytecodeClass(Bytecodes._putfield, BytecodePutField.class); addBytecodeClass(Bytecodes._putstatic, BytecodePutStatic.class)91 addBytecodeClass(Bytecodes._putstatic, BytecodePutStatic.class); addBytecodeClass(Bytecodes._ret, BytecodeRet.class)92 addBytecodeClass(Bytecodes._ret, BytecodeRet.class); addBytecodeClass(Bytecodes._sipush, BytecodeSipush.class)93 addBytecodeClass(Bytecodes._sipush, BytecodeSipush.class); addBytecodeClass(Bytecodes._istore, BytecodeStore.class)94 addBytecodeClass(Bytecodes._istore, BytecodeStore.class); addBytecodeClass(Bytecodes._lstore, BytecodeStore.class)95 addBytecodeClass(Bytecodes._lstore, BytecodeStore.class); addBytecodeClass(Bytecodes._fstore, BytecodeStore.class)96 addBytecodeClass(Bytecodes._fstore, BytecodeStore.class); addBytecodeClass(Bytecodes._dstore, BytecodeStore.class)97 addBytecodeClass(Bytecodes._dstore, BytecodeStore.class); addBytecodeClass(Bytecodes._astore, BytecodeStore.class)98 addBytecodeClass(Bytecodes._astore, BytecodeStore.class); addBytecodeClass(Bytecodes._tableswitch, BytecodeTableswitch.class)99 addBytecodeClass(Bytecodes._tableswitch, BytecodeTableswitch.class); 100 } 101 BytecodeDisassembler(Method method)102 public BytecodeDisassembler(Method method) { 103 this.method = method; 104 } 105 getMethod()106 public Method getMethod() { 107 return method; 108 } 109 decode(BytecodeVisitor visitor)110 public void decode(BytecodeVisitor visitor) { 111 visitor.prologue(method); 112 113 BytecodeStream stream = new BytecodeStream(method); 114 int javacode = Bytecodes._illegal; 115 while ( (javacode = stream.next()) != Bytecodes._illegal) { 116 // look for special Bytecode class 117 int bci = stream.bci(); 118 int hotspotcode = method.getBytecodeOrBPAt(bci); 119 Class<?> clazz = getBytecodeClass(javacode); 120 if (clazz == null) { 121 // check for fast_(i|a)_access_0 122 clazz = getBytecodeClass(hotspotcode); 123 if (clazz == null) { 124 // use generic bytecode class 125 clazz = Bytecode.class; 126 } 127 } 128 129 // All bytecode classes must have a constructor with signature 130 // (Lsun/jvm/hotspot/oops/Method;I)V 131 132 Constructor cstr = null; 133 try { 134 cstr = clazz.getDeclaredConstructor(new Class[] { Method.class, Integer.TYPE }); 135 } catch(NoSuchMethodException nomethod) { 136 if (Assert.ASSERTS_ENABLED) { 137 Assert.that(false, "Bytecode class without proper constructor!"); 138 } 139 } 140 141 Bytecode bytecodeObj = null; 142 try { 143 bytecodeObj = (Bytecode)cstr.newInstance(new Object[] { method, bci}); 144 } catch (Exception exp) { 145 if (Assert.ASSERTS_ENABLED) { 146 Assert.that(false, "Bytecode instance of class " 147 + clazz.getName() + " can not be created!"); 148 } 149 } 150 151 if (stream.isWide()) { 152 visitor.visit(new Bytecode(method, bci - 1)); 153 } 154 155 try { 156 visitor.visit(bytecodeObj); 157 } catch(ClassCastException castfail) { 158 castfail.printStackTrace(); 159 System.err.println(method.getAddress() + " " + bci); 160 } 161 } 162 163 visitor.epilogue(); 164 } 165 } 166