Examples of CheckClassAdapter

com.googlecode.aviator.asm.util.CheckClassAdapter
A {@link ClassAdapter} that checks that its methods are properly used. Moreprecisely this class adapter checks each method call individually, based only on its arguments, but does not check the sequence of method calls. For example, the invalid sequence visitField(ACC_PUBLIC, "i", "I", null) visitField(ACC_PUBLIC, "i", "D", null) will not be detected by this class adapter. @author Eric Bruneton
nginx.clojure.asm.util.CheckClassAdapter
bytes for the source class ClassReader cr = new ClassReader(is); ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS); ClassVisitor cv = new MyClassAdapter(new CheckClassAdapter(cw)); cr.accept(cv, 0); StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); CheckClassAdapter.verify(new ClassReader(cw.toByteArray()), false, pw); assertTrue(sw.toString(), sw.toString().length()==0); Above code runs transformed bytecode trough the CheckClassAdapter. It won't be exactly the same verification as JVM does, but it run data flow analysis for the code of each method and checks that expectations are met for each method instruction.
If method bytecode has errors, assertion text will show the erroneous instruction number and dump of the failed method with information about locals and stack slot for each instruction. For example (format is - insnNumber locals : stack):
```
 nginx.clojure.asm.tree.analysis.AnalyzerException: Error at instruction 71: Expected I, but found . at nginx.clojure.asm.tree.analysis.Analyzer.analyze(Analyzer.java:289) at nginx.clojure.asm.util.CheckClassAdapter.verify(CheckClassAdapter.java:135) ... remove()V 00000 LinkedBlockingQueue$Itr . . . . . . . .  : ICONST_0 00001 LinkedBlockingQueue$Itr . . . . . . . .  : I ISTORE 2 00001 LinkedBlockingQueue$Itr . I . . . . . .  : ... 00071 LinkedBlockingQueue$Itr . I . . . . . .  : ILOAD 1 00072 ? INVOKESPECIAL java/lang/Integer. (I)V ... 
```
In the above output you can see that variable 1 loaded by ILOAD 1 instruction at position 00071 is not initialized. You can also see that at the beginning of the method (code inserted by the transformation) variable 2 is initialized.
Note that when used like that, CheckClassAdapter.verify() can trigger additional class loading, because it is using SimpleVerifier. @author Eric Bruneton
org.deuce.objectweb.asm.util.CheckClassAdapter
bytes for the source class ClassReader cr = new ClassReader(is); ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_MAXS); ClassVisitor cv = new MyClassAdapter(new CheckClassAdapter(cw)); cr.accept(cv, 0); StringWriter sw = new StringWriter(); PrintWriter pw = new PrintWriter(sw); CheckClassAdapter.verify(new ClassReader(cw.toByteArray()), false, pw); assertTrue(sw.toString(), sw.toString().length()==0); Above code runs transformed bytecode trough the CheckClassAdapter. It won't be exactly the same verification as JVM does, but it run data flow analysis for the code of each method and checks that expectations are met for each method instruction.
If method bytecode has errors, assertion text will show the erroneous instruction number and dump of the failed method with information about locals and stack slot for each instruction. For example (format is - insnNumber locals : stack):
```
 org.deuce.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 71: Expected I, but found . at org.deuce.objectweb.asm.tree.analysis.Analyzer.analyze(Analyzer.java:289) at org.deuce.objectweb.asm.util.CheckClassAdapter.verify(CheckClassAdapter.java:135) ... remove()V 00000 LinkedBlockingQueue$Itr . . . . . . . .  : ICONST_0 00001 LinkedBlockingQueue$Itr . . . . . . . .  : I ISTORE 2 00001 LinkedBlockingQueue$Itr . I . . . . . .  : ... 00071 LinkedBlockingQueue$Itr . I . . . . . .  :  ILOAD 1 00072 ?                 INVOKESPECIAL java/lang/Integer. (I)V ... 
```
In the above output you can see that variable 1 loaded by ILOAD 1 instruction at position 00071 is not initialized. You can also see that at the beginning of the method (code inserted by the transformation) variable 2 is initialized.
Note that when used like that, CheckClassAdapter.verify() can trigger additional class loading, because it is using SimpleVerifier. @author Eric Bruneton
org.objectweb.asm.util.CheckClassAdapter
A {@link ClassAdapter ClassAdapter} that checks that its methods are properlyused. More precisely this class adapter checks each method call individually, based only on its arguments, but does not check the sequence of method calls. For example, the invalid sequence visitField(ACC_PUBLIC, "i", "I", null) visitField(ACC_PUBLIC, "i", "D", null) will not be detected by this class adapter. @author Eric Bruneton
org.ow2.easybeans.asm.util.CheckClassAdapter
This class manages the injection. @author Florent Benoit

Examples of org.objectweb.asm.util.CheckClassAdapter

        ClassNode ca = new ClassNode() {
            public void visitEnd() {
                //accept(cv);
            }
        };
        cr.accept(new CheckClassAdapter(ca), true);
        boolean failed = false;


        List methods = ca.methods;
        for (int i = 0; i < methods.size(); ++i) {
            MethodNode method = (MethodNode) methods.get(i);

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Examples of org.objectweb.asm.util.CheckClassAdapter

    }


    @SuppressWarnings("unchecked")
  public Class<T> generate() {
      ClassWriter out = new ClassWriter(ClassWriter.COMPUTE_MAXS);
      CheckClassAdapter writer = new CheckClassAdapter(out);
      
    int offset = 0;
      declareClass(writer);
      declareConstructor(writer);
      for (Method getter : inspector.getters) {
        offset = declareField(getter, writer, offset);
      }
      
      writer.visitEnd();
      
        return (Class<T>) new GeneratedClassLoader(options).defineClass(implementationName, out);
    }

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Examples of org.objectweb.asm.util.CheckClassAdapter

    }


    @SuppressWarnings("unchecked")
  public Class<I> generate() {
      ClassWriter out = new ClassWriter(ClassWriter.COMPUTE_MAXS);
      CheckClassAdapter writer = new CheckClassAdapter(out);
    declareClass(writer);
      declareConstructor(writer);
        declareAccessors(writer);
        customisation.customise(writer);
        return finish(out);

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Examples of org.objectweb.asm.util.CheckClassAdapter

 */
public final class Debugs {


  public static void debugByteCode(ClassDefinition classDefinition, PrintWriter writer) {
    ClassReader reader = new ClassReader(classDefinition.getBytecode());
    reader.accept(new CheckClassAdapter(new TraceClassVisitor(writer)), 0);


    File file = new File("/tmp/" + classDefinition.getInternalName() + ".class");
    file.getParentFile().mkdirs();
    writer.println(file);
    writer.flush();

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Examples of org.objectweb.asm.util.CheckClassAdapter

        
        ClassReader cr = new ClassReader(bytecode);
                
        ClassNode classNode = new ClassNode();
        final int flags = 0;  // Don't skip anything.
        cr.accept(new CheckClassAdapter(classNode), flags);
        
        List<?> methods = classNode.methods;
        for (int i = 0; i < methods.size(); ++i) {
            MethodNode method = (MethodNode)methods.get(i);
            if (method.instructions.size() > 0) {

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Examples of org.objectweb.asm.util.CheckClassAdapter

      ClassClassification classification = context.classify(classfileBuffer);
      ClassReader cr = new ClassReader(classfileBuffer);
      ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
      ClassVisitor cv = cw;
      //cv = new TraceClassVisitor(cv, new PrintWriter(System.err));
      cv = new CheckClassAdapter(cv, false);
      switch (classification) {
        case RESOURCE:
          // Transform checked classes
          cv = new ResourceClassVisitor(cv, context);
          break;

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Examples of org.objectweb.asm.util.CheckClassAdapter

          ClassClassification classification = context.classify(buffer);
          ClassReader cr = new ClassReader(buffer);
          ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS + ClassWriter.COMPUTE_FRAMES);
          ClassVisitor cv = cw;
          //cv = new TraceClassVisitor(cv, new PrintWriter(System.err));
          cv = new CheckClassAdapter(cv, false);
          switch (classification) {
            case RESOURCE:
              // Transform checked classes
              cv = new ResourceClassVisitor(cv, context);
              break;

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Examples of org.objectweb.asm.util.CheckClassAdapter


            if (name.startsWith("com.sun.tools.javac.")) {
                final InputStream classStream = getResourceAsStream(name.replace('.', '/') + ".class");


                final ClassWriter renamedCw = new ClassWriter(true, false);
                new ClassReader(classStream).accept(new RenamingVisitor(new CheckClassAdapter(renamedCw), new ResourceRenamer() {
                    public String getNewNameFor(final String pOldName) {
                        if (pOldName.startsWith(FileOutputStream.class.getName())) {
                            return FileOutputStreamProxy.class.getName();
                        }
                        if (pOldName.startsWith(FileInputStream.class.getName())) {

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Examples of org.objectweb.asm.util.CheckClassAdapter

    Exception e = null;
    String error = "";


    try {
      ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
      ClassVisitor cv = new CheckClassAdapter(cw, true);
      node.accept(cv);


      StringWriter sw = new StringWriter();
      PrintWriter pw = new PrintWriter(sw);
      CheckClassAdapter.verify(new ClassReader(cw.toByteArray()), false, pw);

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Examples of org.objectweb.asm.util.CheckClassAdapter




  private static final void check(byte[] b) {
    ClassReader cr = new ClassReader(b);
    ClassWriter cw = writer();
    ClassVisitor cv = new CheckClassAdapter(cw);
    cr.accept(cv, 0);


    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    CheckClassAdapter.verify(new ClassReader(cw.toByteArray()), false, pw);

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