Example usage for org.objectweb.asm.tree ClassNode ClassNode

Introduction

In this page you can find the example usage for org.objectweb.asm.tree ClassNode ClassNode.

Prototype

public ClassNode()

Source Link

Document

Constructs a new ClassNode .

Usage

From source file:com.navercorp.pinpoint.profiler.instrument.ASMClassNodeLoader.java

License:Apache License

public static ClassNode get(final String classInternalName) throws Exception {
    ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
    ClassReader cr = new ClassReader(
            classLoader.getResourceAsStream(classInternalName.replace('.', '/') + ".class"));
    ClassNode classNode = new ClassNode();
    cr.accept(classNode, ClassReader.EXPAND_FRAMES);

    return classNode;
}

From source file:com.navercorp.pinpoint.profiler.instrument.ASMClassPool.java

License:Apache License

@Override
public InstrumentClass getClass(InstrumentContext instrumentContext, ClassLoader classLoader,
        String classInternalName, byte[] classFileBuffer) throws NotFoundInstrumentException {
    if (classInternalName == null) {
        throw new NullPointerException("class internal name must not be null.");
    }//from  w w w .  ja v a  2  s.  com

    try {
        if (classFileBuffer == null) {
            ASMClassNodeAdapter classNode = ASMClassNodeAdapter.get(classLoader,
                    classInternalName.replace('.', '/'));
            if (classNode == null) {
                return null;
            }

            return new ASMClass(instrumentContext, interceptorRegistryBinder, classLoader, classNode);
        }

        // Use ASM tree api.
        final ClassReader classReader = new ClassReader(classFileBuffer);
        final ClassNode classNode = new ClassNode();
        classReader.accept(classNode, 0);

        return new ASMClass(instrumentContext, interceptorRegistryBinder, classLoader, classNode);
    } catch (Exception e) {
        throw new NotFoundInstrumentException(e);
    }
}

From source file:com.navercorp.pinpoint.profiler.instrument.ASMEngine.java

License:Apache License

@Override
public InstrumentClass getClass(InstrumentContext instrumentContext, ClassLoader classLoader, String className,
        byte[] classFileBuffer) throws NotFoundInstrumentException {
    if (className == null) {
        throw new NullPointerException("class name must not be null.");
    }/*  w  w  w.  ja  v a 2 s  .co  m*/

    try {
        if (classFileBuffer == null) {
            ASMClassNodeAdapter classNode = ASMClassNodeAdapter.get(instrumentContext, classLoader,
                    JavaAssistUtils.javaNameToJvmName(className));
            if (classNode == null) {
                return null;
            }
            ApiMetaDataService apiMetaDataService = this.apiMetaDataService.get();
            return new ASMClass(objectBinderFactory, instrumentContext, interceptorRegistryBinder,
                    apiMetaDataService, classLoader, classNode);
        }

        // Use ASM tree api.
        final ClassReader classReader = new ClassReader(classFileBuffer);
        final ClassNode classNode = new ClassNode();
        classReader.accept(classNode, 0);

        ApiMetaDataService apiMetaDataService = this.apiMetaDataService.get();
        return new ASMClass(objectBinderFactory, instrumentContext, interceptorRegistryBinder,
                apiMetaDataService, classLoader, classNode);
    } catch (Exception e) {
        throw new NotFoundInstrumentException(e);
    }
}

From source file:com.offbynull.coroutines.instrumenter.asm.SimpleClassWriterTest.java

License:Open Source License

@Before
public void setUp() throws IOException {
    byte[] classData = readZipFromResource("SimpleStub.zip").get("SimpleStub.class");

    ClassReader classReader = new ClassReader(classData);
    classNode = new ClassNode();
    classReader.accept(classNode, 0);/*from   w  w w.ja  va  2  s . c o m*/

    methodNode = classNode.methods.get(1); // stub should be here
}

From source file:com.offbynull.coroutines.instrumenter.testhelpers.TestUtils.java

License:Open Source License

/**
 * Load up a ZIP resource from the classpath and generate a {@link ClassNode} for each file with a class extension in that ZIP.
 * Behaviour is ZIP or classes within are not a parseable.
 * @param path path of ZIP resource//  w  w w.  j av a 2  s.  co m
 * @return {@link ClassNode} representation of class files in ZIP
 * @throws NullPointerException if any argument is {@code null}
 * @throws IOException if any IO error occurs
 * @throws IllegalArgumentException if {@code path} cannot be found
 */
public static Map<String, ClassNode> readZipResourcesAsClassNodes(String path) throws IOException {
    Validate.notNull(path);

    Map<String, byte[]> files = readZipFromResource(path);
    Map<String, ClassNode> ret = new LinkedHashMap<>();
    for (Entry<String, byte[]> entry : files.entrySet()) {
        if (!entry.getKey().toLowerCase().endsWith(".class")) {
            continue;
        }

        ClassReader cr = new ClassReader(new ByteArrayInputStream(entry.getValue()));
        ClassNode classNode = new ClassNode();
        cr.accept(classNode, 0);

        ret.put(entry.getKey(), classNode);
    }

    return ret;
}

From source file:com.replaymod.pixelcam.coremod.CameraTiltCT.java

License:Apache License

private byte[] transform(byte[] bytes, String name_orientCamera) {
    ClassReader classReader = new ClassReader(bytes);
    ClassNode classNode = new ClassNode();
    classReader.accept(classNode, 0);/*from w  ww . j  av a  2s.com*/

    boolean success = false;
    for (MethodNode m : classNode.methods) {
        if ("(F)V".equals(m.desc) && name_orientCamera.equals(m.name)) {
            inject(m.instructions.iterator());
            success = true;
        }
    }
    if (!success) {
        throw new NoSuchMethodError();
    }

    ClassWriter classWriter = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    classNode.accept(classWriter);
    return classWriter.toByteArray();
}

From source file:com.retroduction.carma.transformer.asm.AbstractASMTransition.java

License:Open Source License

public List<Mutant> applyTransitions(byte[] byteCode) {

    ClassNode classNode = new ClassNode();

    ClassReader reader = new ClassReader(byteCode);

    reader.accept(classNode, new Attribute[] { new CharacterRangeTable() }, 0);

    List<Mutant> result = new ArrayList<Mutant>();

    int methodIndex = 0;

    for (MethodNode methodNode : (List<MethodNode>) classNode.methods) {

        Iterator<AbstractInsnNode> instructionIterator = methodNode.instructions.iterator();

        CharacterRangeTable crt = null;//from   w  ww.  ja  v  a 2s  .  c  om

        if (methodNode.attrs != null) {
            for (Attribute attr : (List<Attribute>) methodNode.attrs) {
                if (attr instanceof CharacterRangeTable) {
                    crt = (CharacterRangeTable) attr;
                }
            }
        }

        CRTEntry crtEntry = new CRTEntry();

        while (instructionIterator.hasNext()) {

            AbstractInsnNode node = instructionIterator.next();

            if (node instanceof LineNumberNode) {
                if (crt == null) {
                    crtEntry.setStartPos(((LineNumberNode) node).line << 10);
                    crtEntry.setEndPos(((LineNumberNode) node).line << 10);
                }
                continue;
            }

            if ((node instanceof LabelNode)) {

                if (crt == null)
                    continue;

                if (crt.getLabelOffsets().containsKey(((LabelNode) node).getLabel())) {
                    crtEntry = crt.getLabelOffsets().get(((LabelNode) node).getLabel());
                }
                continue;
            }

            this.checkNode(classNode, methodNode, result, crtEntry, node);

        }
        methodIndex++;

    }

    return result;
}

From source file:com.samczsun.helios.LoadedFile.java

License:Apache License

public ClassNode getClassNode(String name) {
    if (name.endsWith(".class")) {
        name = name.substring(0, name.length() - 6);
    }/* www  .  j  a  va 2 s  .  com*/
    if (!classes.containsKey(name)) {
        byte[] bytes = getFiles().get(name + ".class");
        if (bytes != null) {
            try {
                ClassReader reader = new ClassReader(bytes);
                ClassNode classNode = new ClassNode();
                reader.accept(classNode, ClassReader.EXPAND_FRAMES);
                classes.put(name, new WrappedClassNode(this, classNode));
            } catch (Exception t) {
                ExceptionHandler.handle(t);
            }
        }
    }
    return classes.get(name) != null ? classes.get(name).getClassNode() : null;
}

From source file:com.samczsun.helios.LoadedFile.java

License:Apache License

private void load(String entryName, InputStream inputStream) throws IOException {
    ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
    IOUtils.copy(inputStream, outputStream);
    if (entryName.endsWith(".class")) {
        try {//  w ww  . j a  va 2  s. c  o m
            ClassReader reader = new ClassReader(outputStream.toByteArray());
            ClassNode classNode = new ClassNode();
            reader.accept(classNode, ClassReader.SKIP_CODE | ClassReader.SKIP_DEBUG | ClassReader.SKIP_FRAMES);
            emptyClasses.put(classNode.name, new WrappedClassNode(this, classNode));
        } catch (Exception e) { //Malformed class
        }
    }
    if (!files.containsKey(entryName)) {
        files.put(entryName, outputStream.toByteArray());
    } else {
        System.out.println("Uh oh. Duplicate file...");
    }
}

From source file:com.samczsun.helios.transformers.Transformer.java

License:Apache License

protected byte[] fixBytes(byte[] in) {
    ClassReader reader = new ClassReader(in);
    ClassNode node = new ClassNode();
    reader.accept(node, ClassReader.EXPAND_FRAMES);
    ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    node.accept(writer);//ww w .  j a  v  a2 s  .co m
    return writer.toByteArray();
}