/*
* Copyright (c) 2002, 2012, 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.
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*/
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._invokedynamic, 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);
}
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!");
}
}
Bytecode bytecodeObj = null;
try {
bytecodeObj = (Bytecode)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(bytecodeObj);
} catch(ClassCastException castfail) {
castfail.printStackTrace();
System.err.println(method.getAddress() + " " + bci);
}
}
visitor.epilogue();
}
}