Examples of org.apache.bcel.classfile.Code

org.apache.bcel.classfile.Code
This class represents a chunk of Java byte code contained in a method. It is instantiated by the Attribute.readAttribute() method. A Code attribute contains informations about operand stack, local variables, byte code and the exceptions handled within this method. This attribute has attributes itself, namely LineNumberTable which is used for debugging purposes and LocalVariableTable which contains information about the local variables. @version $Id: Code.java 386056 2006-03-15 11:31:56Z tcurdt $ @author M. Dahm @see Attribute @see CodeException @see LineNumberTable @see LocalVariableTable

        } else if (etaba != null || etabb != null) {
            return false;
        }
        
        // compare the exception handling details
        Code acode = a.getCode();
        Code bcode = b.getCode();
        CodeException[] acexs = acode.getExceptionTable();
        CodeException[] bcexs = bcode.getExceptionTable();
        if (acexs.length == bcexs.length) {
            for (int i = 0; i < acexs.length; i++) {
                CodeException acex = acexs[i];
                CodeException bcex = bcexs[i];
                if (acex.getCatchType() != bcex.getCatchType() ||
                    acex.getStartPC() != bcex.getStartPC() ||
                    acex.getEndPC() != bcex.getEndPC() ||
                    acex.getHandlerPC() != bcex.getHandlerPC()) {
                    return false;
                }
            }
        }
        
        // finally compare the actual byte codes
        return Arrays.equals(acode.getCode(), bcode.getCode());
    }

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    public TypeAnalysis(Method method, MethodGen methodGen, CFG cfg, DepthFirstSearch dfs, TypeMerger typeMerger,
            TypeFrameModelingVisitor visitor, RepositoryLookupFailureCallback lookupFailureCallback,
            ExceptionSetFactory exceptionSetFactory) {
        super(dfs);
        this.method = method;
        Code code = method.getCode();
        if (code == null) {
            throw new IllegalArgumentException(method.getName() + " has no code");
        }
        for (Attribute a : code.getAttributes()) {
            if (a instanceof LocalVariableTypeTable) {
                visitor.setLocalTypeTable((LocalVariableTypeTable) a);
            }
        }
        this.methodGen = methodGen;

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                    String methodName = method.getName();
                    if (!methodName.startsWith("access$")) {
                        continue;
                    }


                    Code code = method.getCode();
                    if (code == null) {
                        continue;
                    }


                    if (DEBUG) {
                        System.out.println("Analyzing " + className + "." + method.getName()
                                + " as an inner-class access method...");
                    }


                    byte[] instructionList = code.getCode();
                    String methodSig = method.getSignature();
                    InstructionCallback callback = new InstructionCallback(javaClass, methodName, methodSig, instructionList);
                    //                    try {
                    new BytecodeScanner().scan(instructionList, callback);
                    //                    } catch (LookupFailure lf) {

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    public static SourceLineAnnotation forEntireMethod(JavaClass javaClass, @CheckForNull Method method) {
        String sourceFile = javaClass.getSourceFileName();
        if (method == null) {
            return createUnknown(javaClass.getClassName(), sourceFile);
        }
        Code code = method.getCode();
        LineNumberTable lineNumberTable = method.getLineNumberTable();
        if (code == null || lineNumberTable == null) {
            return createUnknown(javaClass.getClassName(), sourceFile);
        }


        return forEntireMethod(javaClass.getClassName(), sourceFile, lineNumberTable, code.getLength());
    }

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        int endLine = lineNumberTable.getSourceLine(end.getPosition());
        return new SourceLineAnnotation(className, sourceFile, startLine, endLine, start.getPosition(), end.getPosition());
    }


    private static LineNumberTable getLineNumberTable(PreorderVisitor visitor) {
        Code code = visitor.getMethod().getCode();
        if (code == null) {
            return null;
        }
        return code.getLineNumberTable();
    }

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        return false;
    }


    static SourceLineAnnotation getSourceAnnotationForMethod(String className, String methodName, String methodSig) {
        JavaClassAndMethod targetMethod = null;
        Code code = null;


        try {
            JavaClass targetClass = AnalysisContext.currentAnalysisContext().lookupClass(className);
            targetMethod = Hierarchy.findMethod(targetClass, methodName, methodSig);
            if (targetMethod != null) {
                Method method = targetMethod.getMethod();
                if (method != null) {
                    code = method.getCode();
                }
            }


        } catch (ClassNotFoundException e) {
            AnalysisContext.reportMissingClass(e);
        }
        SourceInfoMap sourceInfoMap = AnalysisContext.currentAnalysisContext().getSourceInfoMap();
        SourceInfoMap.SourceLineRange range = sourceInfoMap.getMethodLine(className, methodName, methodSig);


        if (range != null) {
            return new SourceLineAnnotation(className, AnalysisContext.currentAnalysisContext().lookupSourceFile(className),
                    range.getStart(), range.getEnd(), 0, code == null ? -1 : code.getLength());
        }


        if (sourceInfoMap.fallBackToClassfile() && targetMethod != null) {
            return forEntireMethod(targetMethod.getJavaClass(), targetMethod.getMethod());
        }

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        int firstLine = Integer.MAX_VALUE;


        try {
            JavaClass targetClass = AnalysisContext.currentAnalysisContext().lookupClass(className);
            for (Method m : targetClass.getMethods()) {
                Code c = m.getCode();
                if (c != null) {
                    LineNumberTable table = c.getLineNumberTable();
                    if (table != null) {
                        for (LineNumber line : table.getLineNumberTable()) {
                            lastLine = Math.max(lastLine, line.getLineNumber());
                            firstLine = Math.min(firstLine, line.getLineNumber());
                        }

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        // System.out.println(getFullyQualifiedMethodName());
        isPublicStaticVoidMain = method.isPublic() && method.isStatic() && getMethodName().equals("main")
                || cName.toLowerCase().indexOf("benchmark") >= 0;
                prevOpcodeWasReadLine = false;
                Code code = method.getCode();
                if (code != null) {
                    this.exceptionTable = code.getExceptionTable();
                }
                if (this.exceptionTable == null) {
                    this.exceptionTable = new CodeException[0];
                }
                primitiveObjCtorSeen = null;

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        int position = location.getHandle().getPosition();


        if (calledMethod.getClassName().equals("java.lang.Integer")) {


            ConstantPool constantPool = classContext.getJavaClass().getConstantPool();
            Code code = method.getCode();


            int catchSize;


            catchSize = Util.getSizeOfSurroundingTryBlock(constantPool, code, "java/lang/NumberFormatException", position);
            if (catchSize < Integer.MAX_VALUE) {

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     * .classfile.IAnalysisCache, java.lang.Object)
     */
    @Override
    public MethodBytecodeSet analyze(IAnalysisCache analysisCache, MethodDescriptor descriptor) throws CheckedAnalysisException {
        Method method = analysisCache.getMethodAnalysis(Method.class, descriptor);
        Code code = method.getCode();
        if (code == null) {
            return null;
        }


        byte[] instructionList = code.getCode();


        // Create callback
        UnpackedBytecodeCallback callback = new UnpackedBytecodeCallback(instructionList.length);


        // Scan the method.

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