📄 frame.java
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push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
} else {
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value1));
break;
}
throw new AnalyzerException("Illegal use of DUP2");
case Opcodes.DUP2_X1:
value1 = pop();
if (value1.getSize() == 1) {
value2 = pop();
if (value2.getSize() == 1) {
value3 = pop();
if (value3.getSize() == 1) {
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value3));
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
}
} else {
value2 = pop();
if (value2.getSize() == 1) {
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
}
throw new AnalyzerException("Illegal use of DUP2_X1");
case Opcodes.DUP2_X2:
value1 = pop();
if (value1.getSize() == 1) {
value2 = pop();
if (value2.getSize() == 1) {
value3 = pop();
if (value3.getSize() == 1) {
value4 = pop();
if (value4.getSize() == 1) {
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value4));
push(interpreter.copyOperation(insn, value3));
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
} else {
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value3));
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
}
} else {
value2 = pop();
if (value2.getSize() == 1) {
value3 = pop();
if (value3.getSize() == 1) {
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value3));
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
} else {
push(interpreter.copyOperation(insn, value1));
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
}
}
throw new AnalyzerException("Illegal use of DUP2_X2");
case Opcodes.SWAP:
value2 = pop();
value1 = pop();
if (value1.getSize() != 1 || value2.getSize() != 1) {
throw new AnalyzerException("Illegal use of SWAP");
}
push(interpreter.copyOperation(insn, value2));
push(interpreter.copyOperation(insn, value1));
break;
case Opcodes.IADD:
case Opcodes.LADD:
case Opcodes.FADD:
case Opcodes.DADD:
case Opcodes.ISUB:
case Opcodes.LSUB:
case Opcodes.FSUB:
case Opcodes.DSUB:
case Opcodes.IMUL:
case Opcodes.LMUL:
case Opcodes.FMUL:
case Opcodes.DMUL:
case Opcodes.IDIV:
case Opcodes.LDIV:
case Opcodes.FDIV:
case Opcodes.DDIV:
case Opcodes.IREM:
case Opcodes.LREM:
case Opcodes.FREM:
case Opcodes.DREM:
value2 = pop();
value1 = pop();
push(interpreter.binaryOperation(insn, value1, value2));
break;
case Opcodes.INEG:
case Opcodes.LNEG:
case Opcodes.FNEG:
case Opcodes.DNEG:
push(interpreter.unaryOperation(insn, pop()));
break;
case Opcodes.ISHL:
case Opcodes.LSHL:
case Opcodes.ISHR:
case Opcodes.LSHR:
case Opcodes.IUSHR:
case Opcodes.LUSHR:
case Opcodes.IAND:
case Opcodes.LAND:
case Opcodes.IOR:
case Opcodes.LOR:
case Opcodes.IXOR:
case Opcodes.LXOR:
value2 = pop();
value1 = pop();
push(interpreter.binaryOperation(insn, value1, value2));
break;
case Opcodes.IINC:
var = ((IincInsnNode) insn).var;
setLocal(var, interpreter.unaryOperation(insn, getLocal(var)));
break;
case Opcodes.I2L:
case Opcodes.I2F:
case Opcodes.I2D:
case Opcodes.L2I:
case Opcodes.L2F:
case Opcodes.L2D:
case Opcodes.F2I:
case Opcodes.F2L:
case Opcodes.F2D:
case Opcodes.D2I:
case Opcodes.D2L:
case Opcodes.D2F:
case Opcodes.I2B:
case Opcodes.I2C:
case Opcodes.I2S:
push(interpreter.unaryOperation(insn, pop()));
break;
case Opcodes.LCMP:
case Opcodes.FCMPL:
case Opcodes.FCMPG:
case Opcodes.DCMPL:
case Opcodes.DCMPG:
value2 = pop();
value1 = pop();
push(interpreter.binaryOperation(insn, value1, value2));
break;
case Opcodes.IFEQ:
case Opcodes.IFNE:
case Opcodes.IFLT:
case Opcodes.IFGE:
case Opcodes.IFGT:
case Opcodes.IFLE:
interpreter.unaryOperation(insn, pop());
break;
case Opcodes.IF_ICMPEQ:
case Opcodes.IF_ICMPNE:
case Opcodes.IF_ICMPLT:
case Opcodes.IF_ICMPGE:
case Opcodes.IF_ICMPGT:
case Opcodes.IF_ICMPLE:
case Opcodes.IF_ACMPEQ:
case Opcodes.IF_ACMPNE:
value2 = pop();
value1 = pop();
interpreter.binaryOperation(insn, value1, value2);
break;
case Opcodes.GOTO:
break;
case Opcodes.JSR:
push(interpreter.newOperation(insn));
break;
case Opcodes.RET:
break;
case Opcodes.TABLESWITCH:
case Opcodes.LOOKUPSWITCH:
case Opcodes.IRETURN:
case Opcodes.LRETURN:
case Opcodes.FRETURN:
case Opcodes.DRETURN:
case Opcodes.ARETURN:
interpreter.unaryOperation(insn, pop());
break;
case Opcodes.RETURN:
break;
case Opcodes.GETSTATIC:
push(interpreter.newOperation(insn));
break;
case Opcodes.PUTSTATIC:
interpreter.unaryOperation(insn, pop());
break;
case Opcodes.GETFIELD:
push(interpreter.unaryOperation(insn, pop()));
break;
case Opcodes.PUTFIELD:
value2 = pop();
value1 = pop();
interpreter.binaryOperation(insn, value1, value2);
break;
case Opcodes.INVOKEVIRTUAL:
case Opcodes.INVOKESPECIAL:
case Opcodes.INVOKESTATIC:
case Opcodes.INVOKEINTERFACE:
values = new ArrayList();
String desc = ((MethodInsnNode) insn).desc;
for (int i = Type.getArgumentTypes(desc).length; i > 0; --i) {
values.add(0, pop());
}
if (insn.getOpcode() != Opcodes.INVOKESTATIC) {
values.add(0, pop());
}
if (Type.getReturnType(desc) == Type.VOID_TYPE) {
interpreter.naryOperation(insn, values);
} else {
push(interpreter.naryOperation(insn, values));
}
break;
case Opcodes.NEW:
push(interpreter.newOperation(insn));
break;
case Opcodes.NEWARRAY:
case Opcodes.ANEWARRAY:
case Opcodes.ARRAYLENGTH:
push(interpreter.unaryOperation(insn, pop()));
break;
case Opcodes.ATHROW:
interpreter.unaryOperation(insn, pop());
break;
case Opcodes.CHECKCAST:
case Opcodes.INSTANCEOF:
push(interpreter.unaryOperation(insn, pop()));
break;
case Opcodes.MONITORENTER:
case Opcodes.MONITOREXIT:
interpreter.unaryOperation(insn, pop());
break;
case Opcodes.MULTIANEWARRAY:
values = new ArrayList();
for (int i = ((MultiANewArrayInsnNode) insn).dims; i > 0; --i) {
values.add(0, pop());
}
push(interpreter.naryOperation(insn, values));
break;
case Opcodes.IFNULL:
case Opcodes.IFNONNULL:
interpreter.unaryOperation(insn, pop());
break;
default:
throw new RuntimeException("Illegal opcode");
}
}
/**
* Merges this frame with the given frame.
*
* @param frame a frame.
* @param interpreter the interpreter used to merge values.
* @return <tt>true</tt> if this frame has been changed as a result of the
* merge operation, or <tt>false</tt> otherwise.
* @throws AnalyzerException if the frames have incompatible sizes.
*/
public boolean merge(final Frame frame, final Interpreter interpreter)
throws AnalyzerException
{
if (top != frame.top) {
throw new AnalyzerException("Incompatible stack heights");
}
boolean changes = false;
for (int i = 0; i < locals + top; ++i) {
Value v = interpreter.merge(values[i], frame.values[i]);
if (v != values[i]) {
values[i] = v;
changes |= true;
}
}
return changes;
}
/**
* Merges this frame with the given frame (case of a RET instruction).
*
* @param frame a frame
* @param access the local variables that have been accessed by the
* subroutine to which the RET instruction corresponds.
* @return <tt>true</tt> if this frame has been changed as a result of the
* merge operation, or <tt>false</tt> otherwise.
*/
public boolean merge(final Frame frame, final boolean[] access) {
boolean changes = false;
for (int i = 0; i < locals; ++i) {
if (!access[i] && !values[i].equals(frame.values[i])) {
values[i] = frame.values[i];
changes = true;
}
}
return changes;
}
/**
* Returns a string representation of this frame.
*
* @return a string representation of this frame.
*/
public String toString() {
StringBuffer b = new StringBuffer();
for (int i = 0; i < getLocals(); ++i) {
b.append(getLocal(i));
}
b.append(' ');
for (int i = 0; i < getStackSize(); ++i) {
b.append(getStack(i).toString());
}
return b.toString();
}
}
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