Examples with JavaClass org.apache.bcel.classfile.JavaClass used on opensource projects

Example 91 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class Section508Compliance method visitClassContext.

/**
 * implements the visitor to create and clear the stack
 *
 * @param classContext
 *            the context object of the currently visited class
 */
@Override
public void visitClassContext(ClassContext classContext) {
    try {
        if ((jcomponentClass != null) && (accessibleClass != null)) {
            JavaClass cls = classContext.getJavaClass();
            if (cls.instanceOf(jcomponentClass) && !cls.implementationOf(accessibleClass)) {
                bugReporter.reportBug(new BugInstance(this, BugType.S508C_NON_ACCESSIBLE_JCOMPONENT.name(), NORMAL_PRIORITY).addClass(cls));
            }
        }
        stack = new OpcodeStack();
        fieldLabels = new HashSet<>();
        localLabels = new HashMap<>();
        super.visitClassContext(classContext);
        for (XField fa : fieldLabels) {
            bugReporter.reportBug(new BugInstance(this, BugType.S508C_NO_SETLABELFOR.name(), NORMAL_PRIORITY).addClass(this).addField(fa));
        }
    } catch (ClassNotFoundException cnfe) {
        bugReporter.reportMissingClass(cnfe);
    } finally {
        stack = null;
        fieldLabels = null;
        localLabels = null;
    }
}

Example 92 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class Section508Compliance method processSetColorOps.

/**
 * looks for calls to set the color of components where the color isn't from UIManager
 *
 * @param methodName
 *            the method that is called
 *
 * @throws ClassNotFoundException
 *             if the gui component class can't be found
 */
private void processSetColorOps(String methodName) throws ClassNotFoundException {
    if ("setBackground".equals(methodName) || "setForeground".equals(methodName)) {
        int argCount = SignatureUtils.getNumParameters(getSigConstantOperand());
        if (stack.getStackDepth() > argCount) {
            OpcodeStack.Item item = stack.getStackItem(0);
            if (S508UserValue.FROM_UIMANAGER != item.getUserValue()) {
                item = stack.getStackItem(argCount);
                JavaClass cls = item.getJavaClass();
                if (((jcomponentClass != null) && cls.instanceOf(jcomponentClass)) || ((componentClass != null) && cls.instanceOf(componentClass))) {
                    bugReporter.reportBug(new BugInstance(this, BugType.S508C_SET_COMP_COLOR.name(), NORMAL_PRIORITY).addClass(this).addMethod(this).addSourceLine(this));
                }
            }
        }
    }
}

Example 93 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class SillynessPotPourri method sawOpcode.

/**
 * implements the visitor to look for various silly bugs
 *
 * @param seen
 *            the opcode of the currently parsed instruction
 */
@edu.umd.cs.findbugs.annotations.SuppressFBWarnings(value = "SF_SWITCH_FALLTHROUGH", justification = "This fall-through is deliberate and documented")
@Override
public void sawOpcode(int seen) {
    int reg = -1;
    SPPUserValue userValue = null;
    try {
        stack.precomputation(this);
        checkTrimLocations();
        if (isBranchByteCode(seen)) {
            Integer branchTarget = Integer.valueOf(getBranchTarget());
            BitSet branchInsSet = branchTargets.get(branchTarget);
            if (branchInsSet == null) {
                branchInsSet = new BitSet();
                branchTargets.put(branchTarget, branchInsSet);
            }
            branchInsSet.set(getPC());
        }
        // branch also matter here.
        if ((seen == Const.IFEQ) || (seen == Const.IFLE) || (seen == Const.IFNE)) {
            checkForEmptyStringAndNullChecks(seen);
        }
        // see above, several opcodes hit multiple branches.
        if ((seen == Const.IFEQ) || (seen == Const.IFNE) || (seen == Const.IFGT)) {
            checkSizeEquals0();
        }
        if (seen == Const.IFEQ) {
            checkNullAndInstanceOf();
        }
        switch(seen) {
            case Const.IFNE:
                checkNotEqualsStringBuilderLength();
                break;
            case Const.IFEQ:
                checkEqualsStringBufferLength();
                break;
            case Const.IRETURN:
                {
                    if (lastIfEqWasBoolean) {
                        checkForUselessTernaryReturn();
                    }
                }
            // $FALL-THROUGH$
            case Const.LRETURN:
            case Const.DRETURN:
            case Const.FRETURN:
            case Const.ARETURN:
                trimLocations.clear();
                break;
            case Const.LDC2_W:
                checkApproximationsOfMathConstants();
                break;
            case Const.DCMPL:
                checkCompareToNaNDouble();
                break;
            case Const.FCMPL:
                checkCompareToNaNFloat();
                break;
            case Const.ICONST_0:
            case Const.ICONST_1:
            case Const.ICONST_2:
            case Const.ICONST_3:
                userValue = sawIntConst();
                break;
            case Const.CALOAD:
                checkImproperToCharArrayUse();
                break;
            case Const.INVOKESTATIC:
                userValue = sawInvokeStatic();
                break;
            case Const.INVOKEVIRTUAL:
                userValue = sawInvokeVirtual();
                break;
            case Const.INVOKESPECIAL:
                sawInvokeSpecial();
                break;
            case Const.INVOKEINTERFACE:
                userValue = sawInvokeInterface();
                break;
            case Const.IFNULL:
            case Const.IFNONNULL:
                if (stack.getStackDepth() > 0) {
                    OpcodeStack.Item itm = stack.getStackItem(0);
                    JavaClass cls = itm.getJavaClass();
                    if ((cls != null) && optionalClasses.contains(cls.getClassName())) {
                        bugReporter.reportBug(new BugInstance(this, BugType.SPP_NULL_CHECK_ON_OPTIONAL.name(), NORMAL_PRIORITY).addClass(this).addMethod(this).addSourceLine(this));
                    }
                }
                break;
            default:
                if (OpcodeUtils.isALoad(seen)) {
                    sawLoad(seen);
                } else if (OpcodeUtils.isAStore(seen)) {
                    reg = RegisterUtils.getAStoreReg(this, seen);
                    checkTrimDupStore();
                    checkStutterdAssignment(seen, reg);
                    checkImmutableUsageOfStringBuilder(reg);
                }
        }
    } catch (ClassNotFoundException cnfe) {
        bugReporter.reportMissingClass(cnfe);
    } finally {
        TernaryPatcher.pre(stack, seen);
        stack.sawOpcode(this, seen);
        TernaryPatcher.post(stack, seen);
        if ((stack.getStackDepth() > 0)) {
            OpcodeStack.Item item = stack.getStackItem(0);
            if (userValue != null) {
                item.setUserValue(userValue);
            } else {
                SPPUserValue uv = (SPPUserValue) item.getUserValue();
                if ((((uv != null) && (uv.getMethod() == SPPMethod.ITERATOR)) && (seen == Const.GETFIELD)) || (seen == Const.ALOAD) || ((seen >= Const.ALOAD_0) && (seen <= Const.ALOAD_3))) {
                    item.setUserValue(null);
                }
            }
        }
        lastOpcode = seen;
        lastReg = reg;
        System.arraycopy(lastPCs, 1, lastPCs, 0, 3);
        lastPCs[3] = getPC();
    }
}

Example 94 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class SillynessPotPourri method calendarBeforeAfterSilliness.

private void calendarBeforeAfterSilliness() {
    if (stack.getStackDepth() > 1) {
        OpcodeStack.Item item = stack.getStackItem(0);
        String itemSig = item.getSignature();
        // (BUG)
        if (!Values.SIG_JAVA_LANG_OBJECT.equals(itemSig) && !"Ljava/util/Calendar;".equals(itemSig) && !"Ljava/util/GregorianCalendar;".equals(itemSig)) {
            try {
                JavaClass cls = Repository.lookupClass(SignatureUtils.stripSignature(itemSig));
                if (!cls.instanceOf(calendarClass)) {
                    bugReporter.reportBug(new BugInstance(this, BugType.SPP_INVALID_CALENDAR_COMPARE.name(), NORMAL_PRIORITY).addClass(this).addMethod(this).addSourceLine(this));
                }
            } catch (ClassNotFoundException cnfe) {
                bugReporter.reportMissingClass(cnfe);
            }
        }
    }
}

Example 95 with JavaClass

use of org.apache.bcel.classfile.JavaClass in project fb-contrib by mebigfatguy.

the class SillynessPotPourri method defaultToStringSilliness.

private void defaultToStringSilliness() throws ClassNotFoundException {
    if (stack.getStackDepth() >= 1) {
        OpcodeStack.Item item = stack.getStackItem(0);
        JavaClass toStringClass = item.getJavaClass();
        if (toStringClass != null) {
            String toStringClassName = toStringClass.getClassName();
            if (!toStringClass.isInterface() && !toStringClass.isAbstract() && !Values.DOTTED_JAVA_LANG_OBJECT.equals(toStringClassName) && !Values.DOTTED_JAVA_LANG_STRING.equals(toStringClassName) && toStringClasses.add(toStringClassName)) {
                try {
                    JavaClass cls = Repository.lookupClass(toStringClassName);
                    if (!hasToString(cls)) {
                        bugReporter.reportBug(new BugInstance(this, BugType.SPP_NON_USEFUL_TOSTRING.name(), toStringClass.isFinal() ? NORMAL_PRIORITY : LOW_PRIORITY).addClass(this).addMethod(this).addSourceLine(this));
                    }
                } catch (ClassNotFoundException cnfe) {
                    bugReporter.reportMissingClass(cnfe);
                }
            }
        }
    }
}