Examples of org.objectweb.asm.tree.analysis.Analyzer.analyze()

Class org.objectweb.asm.tree.analysis.Analyzer

Examples of org.objectweb.asm.tree.analysis.Analyzer.analyze()

org.objectweb.asm.tree.analysis.Analyzer.analyze()
Analyzes the given method. @param c the class to which the method belongs. @param m the method to be analyzed. @return the symbolic state of the execution stack frame at each bytecodeinstruction of the method. The size of the returned array is equal to the number of instructions (and labels) of the method. A given frame is null if and only if the corresponding instruction cannot be reached (dead code). @throws AnalyzerException if a problem occurs during the analysis.

                    throw new RuntimeException(e.toString()+" " +cl, e);
                }
            }
        });
        try {
            a.analyze(owner, meth);
        } catch (AnalyzerException e) {
            error = e.getMessage();
            if (error.startsWith("Error at instruction ")) {
                error = error.substring("Error at instruction ".length());
                errorInsn = Integer.parseInt(error.substring(0, error

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      protected void newControlFlowEdge(int src, int dst) {
        Node s = (Node) getFrames()[src];
        s.successors.add((Node) getFrames()[dst]);
      }
    };
    a.analyze(owner, mn);
    Frame[] frames = a.getFrames();
    int edges = 0;
    int nodes = 0;
    for (int i = 0; i < frames.length; ++i) {
      if (frames[i] != null) {

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  public void visitEnd() {
    MethodNode mn = (MethodNode) mv;
    Analyzer a = new Analyzer(new BasicInterpreter());
    try {
      a.analyze(owner, mn);
      Frame[] frames = a.getFrames();
      AbstractInsnNode[] insns = mn.instructions.toArray();
      for (int i = 0; i < frames.length; ++i) {
        if (frames[i] == null && !(insns[i] instanceof LabelNode)) {
          mn.instructions.remove(insns[i]);

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  public List<AbstractInsnNode> findNullDereferences(String owner,
      MethodNode mn) throws AnalyzerException {
    List<AbstractInsnNode> result = new ArrayList<AbstractInsnNode>();
    Analyzer a = new Analyzer(new IsNullInterpreter());
    a.analyze(owner, mn);
    Frame[] frames = a.getFrames();
    AbstractInsnNode[] insns = mn.instructions.toArray();
    for (int i = 0; i < insns.length; ++i) {
      AbstractInsnNode insn = insns[i];
      if (frames[i] != null) {

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  }


  public void transform(MethodNode mn) {
    Analyzer a = new Analyzer(new SimpleVerifier());
    try {
      a.analyze(owner, mn);
      Frame[] frames = a.getFrames();
      AbstractInsnNode[] insns = mn.instructions.toArray();
      for (int i = 0; i < insns.length; ++i) {
        AbstractInsnNode insn = insns[i];
        if (insn.getOpcode() == CHECKCAST) {

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  public void visitEnd() {
    MethodNode mn = (MethodNode) mv;
    Analyzer a = new Analyzer(new BasicVerifier());
    try {
      a.analyze(owner, mn);
    } catch (AnalyzerException e) {
      throw new RuntimeException(e.getMessage());
    }
    mn.accept(next);
  }

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        for (int k = 0; k < methods.size(); ++k) {
          MethodNode method = (MethodNode) methods.get(k);
          if (method.instructions.size() > 0) {
            Analyzer a = new Analyzer(new BasicInterpreter());
            try {
              a.analyze(cn.name, method);
            } catch (Throwable th) {
              ++errors;
            }
          }
        }

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        for (int k = 0; k < methods.size(); ++k) {
          MethodNode method = (MethodNode) methods.get(k);
          if (method.instructions.size() > 0) {
            Analyzer a = new Analyzer(new SimpleVerifier());
            try {
              a.analyze(cn.name, method);
            } catch (Throwable th) {
              ++errors;
            }
          }
        }

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      MethodNode method = (MethodNode)methods.get(i);
      if (method.instructions.size() > 0) {
        if (!analyze(ca.classNode, method)) {
          Analyzer a = new Analyzer(new BasicVerifier());
          try {
            a.analyze(ca.classNode, method);
          } catch (Exception ignored) {
          }
          final Frame[] frames = a.getFrames();
          
          TraceCodeVisitor cv = new TraceCodeVisitor(null) {

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   * (in the control flow graph).
   */
  
  public static boolean analyze (ClassNode c, MethodNode m) throws Exception {
    Analyzer a = new Analyzer(new DataflowInterpreter());
    Frame[] frames = a.analyze(c, m);


    // for each xLOAD instruction, we find the xSTORE instructions that can 
    // produce the value loaded by this instruction, and we put them in 'stores'
    Set stores = new HashSet();
    for (int i = 0; i < m.instructions.size(); ++i) {

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