Java Code Examples for org.apache.bcel.Const#ARETURN

The following examples show how to use org.apache.bcel.Const#ARETURN . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: PreferZeroLengthArrays.java From spotbugs with GNU Lesser General Public License v2.1

6 votes

@Override
public void sawOpcode(int seen) {

    switch (seen) {
    case Const.ACONST_NULL:
        nullOnTOS = true;
        return;
    case Const.ARETURN:
        if (nullOnTOS) {
            SourceLineAnnotation sourceLineAnnotation = SourceLineAnnotation.fromVisitedInstruction(getClassContext(), this,
                    getPC());
            if (sourceLineAnnotation != null) {
                found.add(sourceLineAnnotation);
            }
        }
        break;
    default:
        break;
    }
    nullOnTOS = false;
}

Example 2

Source File: ReturnInstruction.java From commons-bcel with Apache License 2.0

6 votes

public Type getType() {
    final short _opcode = super.getOpcode();
    switch (_opcode) {
        case Const.IRETURN:
            return Type.INT;
        case Const.LRETURN:
            return Type.LONG;
        case Const.FRETURN:
            return Type.FLOAT;
        case Const.DRETURN:
            return Type.DOUBLE;
        case Const.ARETURN:
            return Type.OBJECT;
        case Const.RETURN:
            return Type.VOID;
        default: // Never reached
            throw new ClassGenException("Unknown type " + _opcode);
    }
}

Example 3

Source File: DismantleBytecode.java From spotbugs with GNU Lesser General Public License v2.1

5 votes

public boolean isReturn(int opcode) {
    switch (opcode) {
    case Const.IRETURN:
    case Const.ARETURN:
    case Const.LRETURN:
    case Const.DRETURN:
    case Const.FRETURN:
    case Const.RETURN:
        return true;
    default:
        return false;
    }
}

Example 4

Source File: Noise.java From spotbugs with GNU Lesser General Public License v2.1

4 votes

@Override
public void sawOpcode(int seen) {
    int priority;
    switch (seen) {
    case Const.INVOKEINTERFACE:
    case Const.INVOKEVIRTUAL:
    case Const.INVOKESPECIAL:
    case Const.INVOKESTATIC:
        hq.pushHash(getClassConstantOperand());
        if (getNameConstantOperand().indexOf('$') == -1) {
            hq.pushHash(getNameConstantOperand());
        }
        hq.pushHash(getSigConstantOperand());

        priority = hq.getPriority();
        if (priority <= Priorities.LOW_PRIORITY) {
            accumulator.accumulateBug(new BugInstance(this, "NOISE_METHOD_CALL", priority).addClassAndMethod(this)
                    .addCalledMethod(this), this);
        }
        break;
    case Const.GETFIELD:
    case Const.PUTFIELD:
    case Const.GETSTATIC:
    case Const.PUTSTATIC:
        hq.pushHash(getClassConstantOperand());
        if (getNameConstantOperand().indexOf('$') == -1) {
            hq.pushHash(getNameConstantOperand());
        }
        hq.pushHash(getSigConstantOperand());
        priority = hq.getPriority();
        if (priority <= Priorities.LOW_PRIORITY) {
            accumulator.accumulateBug(new BugInstance(this, "NOISE_FIELD_REFERENCE", priority).addClassAndMethod(this)
                    .addReferencedField(this), this);
        }
        break;
    case Const.CHECKCAST:
    case Const.INSTANCEOF:
    case Const.NEW:
        hq.pushHash(getClassConstantOperand());
        break;
    case Const.IFEQ:
    case Const.IFNE:
    case Const.IFNONNULL:
    case Const.IFNULL:
    case Const.IF_ICMPEQ:
    case Const.IF_ICMPNE:
    case Const.IF_ICMPLE:
    case Const.IF_ICMPGE:
    case Const.IF_ICMPGT:
    case Const.IF_ICMPLT:
    case Const.IF_ACMPEQ:
    case Const.IF_ACMPNE:
    case Const.RETURN:
    case Const.ARETURN:
    case Const.IRETURN:
    case Const.MONITORENTER:
    case Const.MONITOREXIT:
    case Const.IINC:
    case Const.NEWARRAY:
    case Const.TABLESWITCH:
    case Const.LOOKUPSWITCH:
    case Const.LCMP:
    case Const.INEG:
    case Const.IADD:
    case Const.IMUL:
    case Const.ISUB:
    case Const.IDIV:
    case Const.IREM:
    case Const.IXOR:
    case Const.ISHL:
    case Const.ISHR:
    case Const.IUSHR:
    case Const.IAND:
    case Const.IOR:
    case Const.LAND:
    case Const.LOR:
    case Const.LADD:
    case Const.LMUL:
    case Const.LSUB:
    case Const.LDIV:
    case Const.LSHL:
    case Const.LSHR:
    case Const.LUSHR:
    case Const.AALOAD:
    case Const.AASTORE:
    case Const.IALOAD:
    case Const.IASTORE:
    case Const.BALOAD:
    case Const.BASTORE:
        hq.push(seen);
        priority = hq.getPriority();
        if (priority <= Priorities.LOW_PRIORITY) {
            accumulator.accumulateBug(
                    new BugInstance(this, "NOISE_OPERATION", priority).addClassAndMethod(this).addString(Const.getOpcodeName(seen)),
                    this);
        }
        break;
    default:
        break;
    }
}

Example 5

Source File: TypeReturnNull.java From spotbugs with GNU Lesser General Public License v2.1

4 votes

@Override
public void sawOpcode(int seen) {
    if (seen == Const.ARETURN && getPrevOpcode(1) == Const.ACONST_NULL) {
        accumulateBug();
    }
}

Example 6

Source File: UselessSubclassMethod.java From spotbugs with GNU Lesser General Public License v2.1

4 votes

@Override
public void sawOpcode(int seen) {
    switch (state) {
    case SEEN_NOTHING:
        if (seen == Const.ALOAD_0) {
            argTypes = Type.getArgumentTypes(this.getMethodSig());
            curParm = 0;
            curParmOffset = 1;
            if (argTypes.length > 0) {
                state = State.SEEN_PARM;
            } else {
                state = State.SEEN_LAST_PARM;
            }
        } else {
            state = State.SEEN_INVALID;
        }
        break;

    case SEEN_PARM:
        if (curParm >= argTypes.length) {
            state = State.SEEN_INVALID;
        } else {
            String signature = argTypes[curParm++].getSignature();
            char typeChar0 = signature.charAt(0);
            if ((typeChar0 == 'L') || (typeChar0 == '[')) {
                checkParm(seen, Const.ALOAD_0, Const.ALOAD, 1);
            } else if (typeChar0 == 'D') {
                checkParm(seen, Const.DLOAD_0, Const.DLOAD, 2);
            } else if (typeChar0 == 'F') {
                checkParm(seen, Const.FLOAD_0, Const.FLOAD, 1);
            } else if (typeChar0 == 'I' || typeChar0 == 'Z' || typeChar0 == 'S' || typeChar0 == 'C') {
                checkParm(seen, Const.ILOAD_0, Const.ILOAD, 1);
            } else if (typeChar0 == 'J') {
                checkParm(seen, Const.LLOAD_0, Const.LLOAD, 2);
            } else {
                state = State.SEEN_INVALID;
            }

            if ((state != State.SEEN_INVALID) && (curParm >= argTypes.length)) {
                state = State.SEEN_LAST_PARM;
            }

        }
        break;

    case SEEN_LAST_PARM:
        if ((seen == Const.INVOKENONVIRTUAL) && getMethodName().equals(getNameConstantOperand())
                && getMethodSig().equals(getSigConstantOperand())) {
            invokePC = getPC();
            state = State.SEEN_INVOKE;
        } else {
            state = State.SEEN_INVALID;
        }
        break;

    case SEEN_INVOKE:
        Type returnType = getMethod().getReturnType();
        char retSigChar0 = returnType.getSignature().charAt(0);
        if ((retSigChar0 == 'V') && (seen == Const.RETURN)) {
            state = State.SEEN_RETURN;
        } else if (((retSigChar0 == 'L') || (retSigChar0 == '[')) && (seen == Const.ARETURN)) {
            state = State.SEEN_RETURN;
        } else if ((retSigChar0 == 'D') && (seen == Const.DRETURN)) {
            state = State.SEEN_RETURN;
        } else if ((retSigChar0 == 'F') && (seen == Const.FRETURN)) {
            state = State.SEEN_RETURN;
        } else if ((retSigChar0 == 'I' || retSigChar0 == 'S' || retSigChar0 == 'C' || retSigChar0 == 'B' || retSigChar0 == 'Z')
                && (seen == Const.IRETURN)) {
            state = State.SEEN_RETURN;
        } else if ((retSigChar0 == 'J') && (seen == Const.LRETURN)) {
            state = State.SEEN_RETURN;
        } else {
            state = State.SEEN_INVALID;
        }
        break;

    case SEEN_RETURN:
        state = State.SEEN_INVALID;
        break;
    default:
        break;
    }
}

Example 7

Source File: FindNoSideEffectMethods.java From spotbugs with GNU Lesser General Public License v2.1

4 votes

@Override
public void visit(Code obj) {
    uselessVoidCandidate = !classInit && !constructor && !getXMethod().isSynthetic() && Type.getReturnType(getMethodSig()) == Type.VOID;
    byte[] code = obj.getCode();
    if (code.length == 4 && (code[0] & 0xFF) == Const.GETSTATIC && (code[3] & 0xFF) == Const.ARETURN) {
        getStaticMethods.add(getMethodDescriptor());
        handleStatus();
        return;
    }

    if (code.length <= 2 && !getXMethod().isStatic() && (getXMethod().isPublic() || getXMethod().isProtected())
            && !getXMethod().isFinal() && (getXClass().isPublic() || getXClass().isProtected())) {
        for (byte[] stubMethod : STUB_METHODS) {
            if (Arrays.equals(stubMethod, code)
                    && (getClassName().endsWith("Visitor") || getClassName().endsWith("Listener") || !hasOtherImplementations(getXMethod()))) {
                // stub method which can be extended: assume it can be extended with possible side-effect
                status = SideEffectStatus.SIDE_EFFECT;
                handleStatus();
                return;
            }
        }
    }
    if (statusMap.containsKey(getMethodDescriptor())) {
        return;
    }
    finallyTargets = new HashSet<>();
    for (CodeException ex : getCode().getExceptionTable()) {
        if (ex.getCatchType() == 0) {
            finallyTargets.add(ex.getHandlerPC());
        }
    }
    finallyExceptionRegisters = new HashSet<>();
    try {
        super.visit(obj);
    } catch (EarlyExitException e) {
        // Ignore
    }
    if (uselessVoidCandidate && code.length > 1
            && (status == SideEffectStatus.UNSURE || status == SideEffectStatus.NO_SIDE_EFFECT)) {
        uselessVoidCandidates.add(getMethodDescriptor());
    }
    handleStatus();
}