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many fixes (it does now work :-)

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git-svn-id: https://svn.code.sf.net/p/jode/code/trunk@410 379699f6-c40d-0410-875b-85095c16579e
stable
jochen 26 years ago
parent ebb0f39f23
commit 40f583a1f0
1 changed files with 230 additions and 107 deletions
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  1. 245
      jode/jode/jvm/Interpreter.java

245
jode/jode/jvm/Interpreter.java
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@ -18,6 +18,9 @@
*/
package jode.jvm;
import jode.bytecode.*;
import jode.decompiler.ClassAnalyzer;
import jode.MethodType;
import jode.Type;
import java.lang.reflect.*;
/**
@ -28,14 +31,109 @@ import java.lang.reflect.*;
* @author Jochen Hoenicke
*/
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 checkMethod(String typesig,
Class[] paramTypes, Class retType) {
if (typesig.charAt(0) != '(')
return false;
int pos = 1;
int i = 0;
while (typesig.charAt(pos) != ')') {
if (i >= paramTypes.length)
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();
}
public static Object interpretMethod
(ClassInfo currentClass, byte[] code, Value[] locals, Value[] stack)
(ClassAnalyzer ca, byte[] code, Value[] locals, Value[] stack)
throws InterpreterException, ClassFormatException {
try {
ConstantPool cpool = currentClass.getConstantPool();
ConstantPool cpool = ca.getClazz().getConstantPool();
int pc = 0;
int stacktop = 0;
for(;;) {
// System.err.print(pc+": [");
// for (int i=0; i<stacktop; i++) {
// if (i>0)
// System.err.print(",");
// System.err.print(stack[i]);
// if (stack[i].objectValue() instanceof char[]) {
// System.err.print(new String((char[])stack[i].objectValue()));
// }
// }
// System.err.println("]");
// System.err.print("local: [");
// for (int i=0; i<locals.length; i++)
// System.err.print(locals[i]+",");
// System.err.println("]");
int opcode = code[pc++] & 0xff;
switch (opcode) {
case opc_nop:
@ -97,8 +195,10 @@ public class Interpreter implements Opcodes {
Object array = stack[--stacktop].objectValue();
switch(opcode) {
case opc_baload:
stack[stacktop++].setInt(((byte[])array)[index]);
break;
stack[stacktop++].setInt
(array instanceof byte[]
? ((byte[])array)[index]
: ((boolean[])array)[index] ? 1 : 0);
case opc_caload:
stack[stacktop++].setInt(((char[])array)[index]);
break;
@ -106,19 +206,11 @@ public class Interpreter implements Opcodes {
stack[stacktop++].setInt(((short[])array)[index]);
break;
case opc_iaload:
stack[stacktop++].setInt(((int[])array)[index]);
break;
case opc_laload:
stack[stacktop++].setLong(((long[])array)[index]);
break;
case opc_faload:
stack[stacktop++].setFloat(((float[])array)[index]);
break;
case opc_daload:
stack[stacktop++].setDouble(((double[])array)[index]);
break;
case opc_aaload:
stack[stacktop++].setObject(((Object[])array)[index]);
stack[stacktop++].setObject(Array.get(array, index));
break;
}
break;
@ -146,30 +238,24 @@ public class Interpreter implements Opcodes {
int index = stack[--stacktop].intValue();
Object array = stack[--stacktop].objectValue();
switch(opcode) {
case opc_baload:
case opc_bastore:
if (array instanceof byte[])
((byte[])array)[index] = (byte) value.intValue();
else
((boolean[])array)[index] = value.intValue() != 0;
break;
case opc_caload:
case opc_castore:
((char[])array)[index] = (char) value.intValue();
break;
case opc_saload:
case opc_sastore:
((short[])array)[index] = (short) value.intValue();
break;
case opc_iaload:
((int[])array)[index] = value.intValue();
break;
case opc_laload:
((long[])array)[index] = value.longValue();
break;
case opc_faload:
((float[])array)[index] = value.floatValue();
break;
case opc_daload:
((double[])array)[index] = value.doubleValue();
break;
case opc_aaload:
((Object[])array)[index] = value.objectValue();
break;
case opc_iastore:
case opc_lastore:
case opc_fastore:
case opc_dastore:
case opc_aastore:
Array.set(array, index, value.objectValue());
}
break;
}
@ -177,25 +263,27 @@ public class Interpreter implements Opcodes {
stacktop -= opcode - (opc_pop-1);
break;
case opc_dup: case opc_dup_x1: case opc_dup_x2: {
int depth = (opcode - opc_dup)%3;
int depth = opcode - opc_dup;
for (int i=0; i < depth+1; i++)
stack[stacktop+1-i].setValue(stack[stacktop-i]);
stack[stacktop-depth].setValue(stack[stacktop]);
stack[stacktop-i].setValue(stack[stacktop-i-1]);
stack[stacktop-depth-1].setValue(stack[stacktop]);
stacktop++;
break;
}
case opc_dup2: case opc_dup2_x1: case opc_dup2_x2: {
int depth = (opcode - opc_dup)%3;
int depth = opcode - opc_dup2;
for (int i=0; i < depth+2; i++)
stack[stacktop+2-i] = stack[stacktop-i];
stack[stacktop-depth].setValue(stack[stacktop+1]);
stack[stacktop-depth-1].setValue(stack[stacktop]);
stack[stacktop+1-i].setValue(stack[stacktop-1-i]);
stack[stacktop-depth-1].setValue(stack[stacktop+1]);
stack[stacktop-depth-2].setValue(stack[stacktop]);
stacktop += 2;
break;
}
case opc_swap: {
Value tmp = stack[stacktop-1];
stack[stacktop-1] = stack[stacktop-2];
stack[stacktop-2] = tmp;
break;
}
case opc_iadd:
stack[stacktop-2].setInt(stack[stacktop-2].intValue()
@ -506,7 +594,7 @@ public class Interpreter implements Opcodes {
|| value < 0 && (opcode == opc_iflt || opcode == opc_ifle)
|| value == 0 && (opcode == opc_ifge || opcode == opc_ifle
|| opcode == opc_ifeq))
pc += opcode;
pc += offset;
break;
}
case opc_jsr:
@ -523,12 +611,16 @@ public class Interpreter implements Opcodes {
int value = stack[--stacktop].intValue();
int start = pc - 1;
pc += 3-(start % 4);
int dest = ((code[pc++] << 8) | (code[pc++] & 0xff));
int low = ((code[pc++] << 8) | (code[pc++] & 0xff));
int high = ((code[pc++] << 8) | (code[pc++] & 0xff));
int dest = (code[pc++] << 24 | (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8 | (code[pc++] & 0xff));
int low = (code[pc++] << 24 | (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8 | (code[pc++] & 0xff));
int high = (code[pc++] << 24 | (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8 | (code[pc++] & 0xff));
if (value >= low && value <= high) {
pc += (value - low) << 1;
dest = ((code[pc] << 8) | (code[pc+1] & 0xff));
pc += (value - low) << 2;
dest = (code[pc++] << 24 | (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8 | (code[pc++] & 0xff));
}
pc = start + dest;
break;
@ -537,11 +629,23 @@ public class Interpreter implements Opcodes {
int value = stack[--stacktop].intValue();
int start = pc - 1;
pc += 3-(start % 4);
int dest = ((code[pc++] << 8) | (code[pc++] & 0xff));
int npairs = ((code[pc++] << 8) | (code[pc++] & 0xff));
int dest = (code[pc++] << 24
| (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8
| (code[pc++] & 0xff));
int npairs = (code[pc++] << 24
| (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8
| (code[pc++] & 0xff));
for (int i=0; i < npairs; i++) {
if (value == ((code[pc++] << 8) | (code[pc++] & 0xff))) {
dest = ((code[pc++] << 8) | (code[pc++] & 0xff));
if (value == (code[pc++] << 24
| (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8
| (code[pc++] & 0xff))) {
dest = (code[pc++] << 24
| (code[pc++] & 0xff) << 16
| (code[pc++] & 0xff) << 8
| (code[pc++] & 0xff));
break;
}
pc+=2;
@ -569,15 +673,28 @@ public class Interpreter implements Opcodes {
int argcount= (opcode == opc_invokeinterface)
? (code[pc++] << 8) | (code[pc++] & 0xff) : -1;
// if (ref[0] == currentClass.getName()) {
// /* invoke interpreter again */
// } else {
if (ref[0].equals(ca.getClazz().getName().replace('.','/'))) {
boolean isStatic = opcode == opc_invokestatic;
MethodType mt = new MethodType(isStatic, ref[2]);
CodeInfo info = ca.getMethod(ref[1], mt)
.getCode().getCodeInfo();
Value[] newLocals = new Value[info.getMaxLocals()];
for (int i=0; i< newLocals.length; i++)
newLocals[i] = new Value();
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]);
Object result = interpretMethod(ca, info.getCode(),
newLocals, newStack);
if (mt.getReturnType() != Type.tVoid) {
stack[stacktop++].setObject(result);
}
} else {
Class clazz;
try {
clazz = Class.forName
(cpool.getClassName((code[pc++] << 8) & 0xff00
| code[pc++] & 0xff)
.replace('/','.'));
clazz = Class.forName(ref[0].replace('/','.'));
} catch (ClassNotFoundException ex) {
throw new InterpreterException
("Class "+ref[0]+" not found");
@ -587,10 +704,12 @@ public class Interpreter implements Opcodes {
Constructor[] cs = clazz.getConstructors();
Constructor c = null;
for (int i=0; i< cs.length; i++) {
/* check types XXX */
if (checkMethod(ref[2], cs[i].getParameterTypes(),
Void.TYPE)) {
c = cs[i];
break;
}
}
if (c == null)
throw new InterpreterException("Constructor "
+ref[0]+"."
@ -599,9 +718,8 @@ public class Interpreter implements Opcodes {
= new Object[c.getParameterTypes().length];
for (int i=args.length - 1; i >= 0; i--)
args[i] = stack[--stacktop].objectValue();
NewObject newObj =
(NewObject) stack[--stacktop].objectValue();
if (!newObj.getClass().equals(ref[0]))
NewObject newObj = stack[--stacktop].getNewObject();
if (!newObj.getType().equals(ref[0]))
throw new InterpreterException("constructor not called"
+" on new instance");
newObj.setObject(c.newInstance(args));
@ -610,11 +728,14 @@ public class Interpreter implements Opcodes {
Method m = null;
for (int i=0; i< ms.length; i++) {
if (ms[i].getName().equals(ref[1])) {
/* check types XXX */
if (checkMethod(ref[2],
ms[i].getParameterTypes(),
ms[i].getReturnType())) {
m = ms[i];
break;
}
}
}
if (m == null)
throw new InterpreterException("Method "+ref[0]+"."
+ref[1]+" not found.");
@ -641,12 +762,13 @@ public class Interpreter implements Opcodes {
("Method "+ref[0]+"."+ref[1]+" throwed an exception");
/*XXX exception handler?*/
}
}
break;
}
case opc_new: {
String clazz = cpool.getClassName((code[pc++] << 8) & 0xff00
| code[pc++] & 0xff);
stack[stacktop++].setObject(new NewObject(clazz));
stack[stacktop++].setNewObject(new NewObject(clazz));
break;
}
case opc_newarray: {
@ -805,6 +927,7 @@ public class Interpreter implements Opcodes {
}
}
} catch(RuntimeException ex) {
ex.printStackTrace();
throw new InterpreterException("Caught RuntimeException: "
+ ex.toString());
}

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