Examples with QMethod com.mebigfatguy.fbcontrib.utils.QMethod used on opensource projects

Example 11 with QMethod

use of com.mebigfatguy.fbcontrib.utils.QMethod in project fb-contrib by mebigfatguy.

the class NonRecycleableTaglibs method getAttributes.

/**
 * collect all possible attributes given the name of methods available.
 *
 * @param cls
 *            the class to look for setter methods to infer properties
 * @return the map of possible attributes/types
 */
private static Map<QMethod, String> getAttributes(JavaClass cls) {
    Map<QMethod, String> atts = new HashMap<>();
    Method[] methods = cls.getMethods();
    for (Method m : methods) {
        String name = m.getName();
        if (name.startsWith("set") && m.isPublic() && !m.isStatic()) {
            String sig = m.getSignature();
            List<String> args = SignatureUtils.getParameterSignatures(sig);
            if ((args.size() == 1) && Values.SIG_VOID.equals(SignatureUtils.getReturnSignature(sig))) {
                String parmSig = args.get(0);
                if (validAttrTypes.contains(parmSig)) {
                    Code code = m.getCode();
                    if ((code != null) && (code.getCode().length < MAX_ATTRIBUTE_CODE_LENGTH)) {
                        atts.put(new QMethod(name, sig), parmSig);
                    }
                }
            }
        }
    }
    return atts;
}

Example 12 with QMethod

use of com.mebigfatguy.fbcontrib.utils.QMethod in project fb-contrib by mebigfatguy.

the class ModifyingUnmodifiableCollection method sawOpcode.

/**
 * overrides the visitor to find method mutations on collections that have previously been determined to have been created as immutable collections
 *
 * @param seen
 *            the currently parsed opcode
 */
@Override
public void sawOpcode(int seen) {
    ImmutabilityType imType = null;
    try {
        stack.precomputation(this);
        switch(seen) {
            case INVOKESTATIC:
            case INVOKEINTERFACE:
            case INVOKESPECIAL:
            case INVOKEVIRTUAL:
                {
                    String className = getClassConstantOperand();
                    String methodName = getNameConstantOperand();
                    String signature = getSigConstantOperand();
                    MethodInfo mi = Statistics.getStatistics().getMethodStatistics(className, methodName, signature);
                    imType = mi.getImmutabilityType();
                    if (seen == INVOKEINTERFACE) {
                        Integer collectionOffset = MODIFYING_METHODS.get(new QMethod(methodName, signature));
                        if ((collectionOffset != null) && CollectionUtils.isListSetMap(className) && (stack.getStackDepth() > collectionOffset.intValue())) {
                            OpcodeStack.Item item = stack.getStackItem(collectionOffset.intValue());
                            ImmutabilityType type = (ImmutabilityType) item.getUserValue();
                            if ((type == ImmutabilityType.IMMUTABLE) || ((type == ImmutabilityType.POSSIBLY_IMMUTABLE) && (reportedType != ImmutabilityType.POSSIBLY_IMMUTABLE))) {
                                bugReporter.reportBug(new BugInstance(this, BugType.MUC_MODIFYING_UNMODIFIABLE_COLLECTION.name(), (type == ImmutabilityType.IMMUTABLE) ? HIGH_PRIORITY : NORMAL_PRIORITY).addClass(this).addMethod(this).addSourceLine(this));
                                if (type == ImmutabilityType.IMMUTABLE) {
                                    throw new StopOpcodeParsingException();
                                }
                                reportedType = type;
                            }
                        }
                    }
                }
                break;
            default:
                break;
        }
    } catch (ClassNotFoundException cnfe) {
        bugReporter.reportMissingClass(cnfe);
    } finally {
        stack.sawOpcode(this, seen);
        if ((imType != null) && (stack.getStackDepth() > 0)) {
            OpcodeStack.Item item = stack.getStackItem(0);
            item.setUserValue(imType);
        }
    }
}

Example 13 with QMethod

use of com.mebigfatguy.fbcontrib.utils.QMethod in project fb-contrib by mebigfatguy.

the class CollectStatistics method performModifyStateClosure.

private void performModifyStateClosure(JavaClass cls) {
    boolean foundNewCall = true;
    Statistics statistics = Statistics.getStatistics();
    String clsName = cls.getClassName();
    while (foundNewCall && !selfCallTree.isEmpty()) {
        foundNewCall = false;
        Iterator<Map.Entry<QMethod, Set<CalledMethod>>> callerIt = selfCallTree.entrySet().iterator();
        while (callerIt.hasNext()) {
            Map.Entry<QMethod, Set<CalledMethod>> callerEntry = callerIt.next();
            QMethod caller = callerEntry.getKey();
            MethodInfo callerMi = statistics.getMethodStatistics(clsName, caller.getMethodName(), caller.getSignature());
            if (callerMi == null) {
                // odd, shouldn't happen
                foundNewCall = true;
            } else if (callerMi.getModifiesState()) {
                foundNewCall = true;
            } else {
                for (CalledMethod calledMethod : callerEntry.getValue()) {
                    if (calledMethod.isSuper) {
                        callerMi.setModifiesState(true);
                        foundNewCall = true;
                        break;
                    }
                    MethodInfo calleeMi = statistics.getMethodStatistics(clsName, calledMethod.callee.getMethodName(), calledMethod.callee.getSignature());
                    if (calleeMi == null) {
                        // a super or sub class probably implements this method so just assume it
                        // modifies state
                        callerMi.setModifiesState(true);
                        foundNewCall = true;
                        break;
                    }
                    if (calleeMi.getModifiesState()) {
                        callerMi.setModifiesState(true);
                        foundNewCall = true;
                        break;
                    }
                }
            }
            if (foundNewCall) {
                callerIt.remove();
            }
        }
    }
    selfCallTree.clear();
}

Example 14 with QMethod

use of com.mebigfatguy.fbcontrib.utils.QMethod in project fb-contrib by mebigfatguy.

the class CollectStatistics method sawOpcode.

@Override
public void sawOpcode(int seen) {
    try {
        switch(seen) {
            case Const.INVOKEVIRTUAL:
            case Const.INVOKEINTERFACE:
            case Const.INVOKESPECIAL:
            case Const.INVOKESTATIC:
            case Const.INVOKEDYNAMIC:
                numMethodCalls++;
                if (seen != Const.INVOKESTATIC) {
                    int numParms = SignatureUtils.getNumParameters(getSigConstantOperand());
                    if (stack.getStackDepth() > numParms) {
                        OpcodeStack.Item itm = stack.getStackItem(numParms);
                        if (itm.getRegisterNumber() == 0) {
                            Set<CalledMethod> calledMethods;
                            if (curMethod == null) {
                                curMethod = new QMethod(getMethodName(), getMethodSig());
                                calledMethods = new HashSet<>();
                                selfCallTree.put(curMethod, calledMethods);
                            } else {
                                calledMethods = selfCallTree.get(curMethod);
                            }
                            calledMethods.add(new CalledMethod(new QMethod(getNameConstantOperand(), getSigConstantOperand()), seen == Const.INVOKESPECIAL));
                        }
                    }
                }
                break;
            case Const.PUTSTATIC:
            case Const.PUTFIELD:
                modifiesState = true;
                break;
            default:
                break;
        }
    } finally {
        stack.sawOpcode(this, seen);
    }
}