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

The following examples show how to use org.apache.bcel.Const#LAND . 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: IncompatMask.java From spotbugs with GNU Lesser General Public License v2.1

6 votes

@Override
public void afterOpcode(int seen) {
    super.afterOpcode(seen);
    switch (seen) {
    case Const.IAND:
    case Const.LAND:
    case Const.IOR:
    case Const.LOR:
        if (stack.getStackDepth() > 0) {
            bitresultItem = stack.getStackItem(0);
        }
        break;
    default:
        break;
    }
}

Example 2

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 3

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

4 votes

private void pushByLongMath(int seen, Item lhs, Item rhs) {
    Item newValue = new Item("J");
    try {

        if ((rhs.getConstant() != null) && lhs.getConstant() != null) {

            long lhsValue = constantToLong(lhs);
            if (seen == Const.LSHL) {
                newValue = new Item("J", Long.valueOf(lhsValue << constantToInt(rhs)));
                if (constantToInt(rhs) >= 8) {
                    newValue.setSpecialKind(Item.LOW_8_BITS_CLEAR);
                }
            } else if (seen == Const.LSHR) {
                newValue = new Item("J", Long.valueOf(lhsValue >> constantToInt(rhs)));
            } else if (seen == Const.LUSHR) {
                newValue = new Item("J", Long.valueOf(lhsValue >>> constantToInt(rhs)));
            } else {
                long rhsValue = constantToLong(rhs);
                if (seen == Const.LADD) {
                    newValue = new Item("J", Long.valueOf(lhsValue + rhsValue));
                } else if (seen == Const.LSUB) {
                    newValue = new Item("J", Long.valueOf(lhsValue - rhsValue));
                } else if (seen == Const.LMUL) {
                    newValue = new Item("J", Long.valueOf(lhsValue * rhsValue));
                } else if (seen == Const.LDIV) {
                    if (rhsValue != 0) {
                        newValue = new Item("J", Long.valueOf(lhsValue / rhsValue));
                    } else {
                        // Code like "return 1L / (1L / 2);"
                        // Here we could report bug, because it will throw java.lang.ArithmeticException: / by zero,
                        // see #413
                    }
                } else if (seen == Const.LAND) {
                    newValue = new Item("J", Long.valueOf(lhsValue & rhsValue));
                    if ((rhsValue & 0xff) == 0 && rhsValue != 0 || (lhsValue & 0xff) == 0 && lhsValue != 0) {
                        newValue.setSpecialKind(Item.LOW_8_BITS_CLEAR);
                    }
                } else if (seen == Const.LOR) {
                    newValue = new Item("J", Long.valueOf(lhsValue | rhsValue));
                } else if (seen == Const.LXOR) {
                    newValue = new Item("J", Long.valueOf(lhsValue ^ rhsValue));
                } else if (seen == Const.LREM) {
                    if (rhsValue != 0) {
                        newValue = new Item("J", Long.valueOf(lhsValue % rhsValue));
                    } else {
                        // Code like "return 1L % (1L / 2);"
                        // Here we could report bug, because it will throw java.lang.ArithmeticException: / by zero,
                        // see #413
                    }
                }
            }
        } else if (rhs.getConstant() != null && seen == Const.LSHL && constantToInt(rhs) >= 8) {
            newValue.setSpecialKind(Item.LOW_8_BITS_CLEAR);
        } else if (lhs.getConstant() != null && seen == Const.LAND && (constantToLong(lhs) & 0xff) == 0) {
            newValue.setSpecialKind(Item.LOW_8_BITS_CLEAR);
        } else if (rhs.getConstant() != null && seen == Const.LAND && (constantToLong(rhs) & 0xff) == 0) {
            newValue.setSpecialKind(Item.LOW_8_BITS_CLEAR);
        }
    } catch (RuntimeException e) {
        // TODO: this catch is probably not needed anymore after fixes for issue 386 and 413
        // Added logging to see if there were even more issues with the code.
        String context = v != null ? v.getFullyQualifiedMethodName() : toString();
        AnalysisContext.logError(
                String.format("Exception processing 'pushByLongMath' with opcode %d, lhs %s and rhs %s in %s",
                        seen, String.valueOf(lhs), String.valueOf(rhs), context), e);
    }
    push(newValue);
}

Example 4

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

4 votes

/** @return type associated with the instruction
 */
@Override
public Type getType( final ConstantPoolGen cp ) {
    final short _opcode = super.getOpcode();
    switch (_opcode) {
        case Const.DADD:
        case Const.DDIV:
        case Const.DMUL:
        case Const.DNEG:
        case Const.DREM:
        case Const.DSUB:
            return Type.DOUBLE;
        case Const.FADD:
        case Const.FDIV:
        case Const.FMUL:
        case Const.FNEG:
        case Const.FREM:
        case Const.FSUB:
            return Type.FLOAT;
        case Const.IADD:
        case Const.IAND:
        case Const.IDIV:
        case Const.IMUL:
        case Const.INEG:
        case Const.IOR:
        case Const.IREM:
        case Const.ISHL:
        case Const.ISHR:
        case Const.ISUB:
        case Const.IUSHR:
        case Const.IXOR:
            return Type.INT;
        case Const.LADD:
        case Const.LAND:
        case Const.LDIV:
        case Const.LMUL:
        case Const.LNEG:
        case Const.LOR:
        case Const.LREM:
        case Const.LSHL:
        case Const.LSHR:
        case Const.LSUB:
        case Const.LUSHR:
        case Const.LXOR:
            return Type.LONG;
        default: // Never reached
            throw new ClassGenException("Unknown type " + _opcode);
    }
}