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fix in checkcast

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simplification of opcodes


git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@496 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent 7cbfee8e50
commit 4b6fdba442
1 changed files with 81 additions and 122 deletions
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  1. 203
      jode/jode/jvm/Interpreter.java

203
jode/jode/jvm/Interpreter.java
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@ -1,26 +1,26 @@
/*
* Opcodes (c) 1998 Jochen Hoenicke
/* Interpreter Copyright (C) 1999 Jochen Hoenicke.
*
* You may distribute under the terms of the GNU General Public License.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* IN NO EVENT SHALL JOCHEN HOENICKE BE LIABLE TO ANY PARTY FOR DIRECT,
* INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF
* THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF JOCHEN HOENICKE
* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* This program 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 for more details.
*
* JOCHEN HOENICKE SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS"
* BASIS, AND JOCHEN HOENICKE HAS NO OBLIGATION TO PROVIDE MAINTENANCE,
* SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package jode.jvm;
import jode.*;
import jode.bytecode.*;
import jode.decompiler.ClassAnalyzer;
import jode.MethodType;
import jode.Type;
import java.lang.reflect.*;
/**
@ -32,84 +32,46 @@ import java.lang.reflect.*;
*/
public class Interpreter implements Opcodes {
static int checkType(String typesig, int pos, Class type) {
switch (typesig.charAt(pos++)) {
case 'Z':
if (type != Boolean.TYPE)
return -1;
break;
case 'B':
if (type != Byte.TYPE)
return -1;
break;
case 'C':
if (type != Character.TYPE)
return -1;
break;
case 'S':
if (type != Short.TYPE)
return -1;
break;
case 'I':
if (type != Integer.TYPE)
return -1;
break;
case 'J':
if (type != Long.TYPE)
return -1;
break;
case 'F':
if (type != Float.TYPE)
return -1;
break;
case 'D':
if (type != Double.TYPE)
return -1;
break;
case 'V':
if (type != Void.TYPE)
return -1;
break;
case '[':
if (!type.isArray())
return -1;
pos = checkType(typesig, pos, type.getComponentType());
break;
case 'L': {
int index = typesig.indexOf(';', pos);
if (index == -1)
return -1;
if (!type.getName().replace('.','/')
.equals(typesig.substring(pos, index)))
return -1;
pos = index+1;
break;
}
default:
return -1;
}
return pos;
static boolean checkType(Type type1, Class type2) {
if (type1 == Type.tBoolean) {
return type2 == Boolean.TYPE;
} else if (type1 == Type.tByte) {
return type2 == Byte.TYPE;
} else if (type1 == Type.tChar) {
return type2 == Character.TYPE;
} else if (type1 == Type.tShort) {
return type2 == Short.TYPE;
} else if (type1 == Type.tInt) {
return type2 == Integer.TYPE;
} else if (type1 == Type.tLong) {
return type2 == Long.TYPE;
} else if (type1 == Type.tFloat) {
return type2 == Float.TYPE;
} else if (type1 == Type.tDouble) {
return type2 == Double.TYPE;
} else if (type1 == Type.tVoid) {
return type2 == Void.TYPE;
} else if (type1 instanceof ArrayType) {
if (!type2.isArray())
return false;
return checkType(((ArrayType)type1).getElementType(),
type2.getComponentType());
} else if (type1 instanceof ClassInterfacesType) {
return type1.equals(Type.tClass(type2.getName()));
} else
return false;
}
static boolean checkMethod(String typesig,
static boolean checkMethod(MethodType methodType,
Class[] paramTypes, Class retType) {
if (typesig.charAt(0) != '(')
Type[] params = methodType.getParameterTypes();
if (params.length != paramTypes.length)
return false;
int pos = 1;
int i = 0;
while (typesig.charAt(pos) != ')') {
if (i >= paramTypes.length)
for (int i=0; i < params.length; i++) {
if (!checkType(params[i], paramTypes[i]))
return false;
pos = checkType(typesig, pos, paramTypes[i++]);
if (pos == -1) {
return false;
}
}
if (i != paramTypes.length)
return false;
pos++;
pos = checkType(typesig, pos, retType);
return pos == typesig.length();
return checkType(methodType.getReturnType(), retType);
}
public static Object interpretMethod
@ -139,17 +101,7 @@ public class Interpreter implements Opcodes {
switch (opcode) {
case opc_nop:
break;
case opc_aconst_null:
case opc_iconst_m1:
case opc_iconst_0: case opc_iconst_1: case opc_iconst_2:
case opc_iconst_3: case opc_iconst_4: case opc_iconst_5:
case opc_lconst_0: case opc_lconst_1:
case opc_fconst_0: case opc_fconst_1: case opc_fconst_2:
case opc_dconst_0: case opc_dconst_1:
case opc_bipush:
case opc_sipush:
case opc_ldc:
case opc_ldc_w:
case opc_ldc2_w: {
stack[stacktop++].setObject(instr.objData);
break;
@ -600,12 +552,11 @@ public class Interpreter implements Opcodes {
case opc_invokespecial:
case opc_invokestatic :
case opc_invokeinterface: {
String[] ref = (String[]) instr.objData;
Reference ref = (Reference) instr.objData;
if (ref[0].equals(ca.getClazz().getName().replace('.','/'))) {
boolean isStatic = opcode == opc_invokestatic;
MethodType mt = new MethodType(isStatic, ref[2]);
BytecodeInfo info = ca.getMethod(ref[1], mt)
if (ref.getClazz().equals(ca.getClazz().getName())) {
MethodType mt = (MethodType) Type.tType(ref.getType());
BytecodeInfo info = ca.getMethod(ref.getName(), mt)
.getCode().getBytecodeInfo();
Value[] newLocals = new Value[info.getMaxLocals()];
for (int i=0; i< newLocals.length; i++)
@ -613,8 +564,14 @@ public class Interpreter implements Opcodes {
Value[] newStack = new Value[info.getMaxStack()];
for (int i=0; i< newStack.length; i++)
newStack[i] = new Value();
for (int i=mt.getParameterTypes().length - 1; i >= 0; i--)
newLocals[i].setValue(stack[--stacktop]);
int param = mt.getParameterTypes().length;
int slot = 0;
if (opcode != opc_invokestatic)
newLocals[slot++].setValue(stack[stacktop-param-1]);
for (int i = 0; i < param; i++) {
newLocals[slot].setValue(stack[stacktop-param+i]);
slot += mt.getParameterTypes()[i].stackSize();
}
Object result = interpretMethod(ca, info,
newLocals, newStack);
if (mt.getReturnType() != Type.tVoid)
@ -622,41 +579,43 @@ public class Interpreter implements Opcodes {
} else {
Class clazz;
try {
clazz = Class.forName(ref[0].replace('/','.'));
clazz = Class.forName(ref.getClazz());
} catch (ClassNotFoundException ex) {
throw new InterpreterException
("Class "+ref[0]+" not found");
("Class "+ref.getClazz()+" not found");
}
try {
if (ref[1].equals("<init>")) {
if (ref.getName().equals("<init>")) {
Constructor[] cs = clazz.getConstructors();
Constructor c = null;
for (int i=0; i< cs.length; i++) {
if (checkMethod(ref[2], cs[i].getParameterTypes(),
if (checkMethod((MethodType)
Type.tType(ref.getType()),
cs[i].getParameterTypes(),
Void.TYPE)) {
c = cs[i];
break;
}
}
if (c == null)
throw new InterpreterException("Constructor "
+ref[0]+"."
+ref[1]+" not found.");
throw new InterpreterException
("Constructor " + ref + " not found.");
Object[] args
= new Object[c.getParameterTypes().length];
for (int i=args.length - 1; i >= 0; i--)
args[i] = stack[--stacktop].objectValue();
NewObject newObj = stack[--stacktop].getNewObject();
if (!newObj.getType().equals(ref[0]))
throw new InterpreterException("constructor not called"
+" on new instance");
if (!newObj.getType().equals(ref.getClazz()))
throw new InterpreterException
("constructor called on wrong type");
newObj.setObject(c.newInstance(args));
} else {
Method[] ms = clazz.getMethods();
Method m = null;
for (int i=0; i< ms.length; i++) {
if (ms[i].getName().equals(ref[1])) {
if (checkMethod(ref[2],
if (ms[i].getName().equals(ref.getName())) {
if (checkMethod((MethodType)
Type.tType(ref.getType()),
ms[i].getParameterTypes(),
ms[i].getReturnType())) {
m = ms[i];
@ -665,8 +624,8 @@ public class Interpreter implements Opcodes {
}
}
if (m == null)
throw new InterpreterException("Method "+ref[0]+"."
+ref[1]+" not found.");
throw new InterpreterException
("Method " + ref + " not found.");
Object obj = null;
Object[] args
= new Object[m.getParameterTypes().length];
@ -681,13 +640,13 @@ public class Interpreter implements Opcodes {
}
} catch (IllegalAccessException ex) {
throw new InterpreterException
("Method "+ref[0]+"."+ref[1]+" not accessible");
("Method " + ref + " not accessible");
} catch (InstantiationException ex) {
throw new InterpreterException
("InstantiationException in "+ref[0]+"."+ref[1]+".");
("InstantiationException in " + ref + ".");
} catch (InvocationTargetException ex) {
throw new InterpreterException
("Method "+ref[0]+"."+ref[1]+" throwed an exception");
("Method " + ref + " throwed an exception");
/*XXX exception handler?*/
}
}
@ -758,7 +717,7 @@ public class Interpreter implements Opcodes {
throw new InterpreterException
("Class "+ex.getMessage()+" not found");
}
Object obj = stack[--stacktop].objectValue();
Object obj = stack[stacktop-1].objectValue();
if (obj != null && !clazz.isInstance(obj)) {
/*XXX*/
throw new InterpreterException
@ -796,7 +755,7 @@ public class Interpreter implements Opcodes {
}
int dimension = instr.intData;
int[] dims = new int[dimension];
for (int i=dimension-1; i >= 0; i--)
for (int i=dimension - 1; i >= 0; i--)
dims[i-1] = stack[--stacktop].intValue();
stack[stacktop++].setObject(Array.newInstance(clazz, dims));
break;

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