Example usage for org.objectweb.asm Opcodes RETURN

List of usage examples for org.objectweb.asm Opcodes RETURN

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Prototype

int RETURN

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Usage

From source file:org.batoo.jpa.core.impl.instance.Enhancer.java

License:Open Source License

private static void createNoArgConstructor(final String enhancingClassName, final String enhancedClassName,
        final String descEnhancer, final ClassWriter cw) {
    final MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, Enhancer.CONSTRUCTOR_INIT,
            Enhancer.makeDescription(Void.TYPE), null, null);
    mv.visitCode();//  www .j a va  2  s .  com

    final Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, enhancingClassName, Enhancer.CONSTRUCTOR_INIT,
            Enhancer.makeDescription(Void.TYPE));

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitFieldInsn(Opcodes.PUTFIELD, enhancedClassName, Enhancer.FIELD_ENHANCED_ID,
            Enhancer.DESCRIPTOR_OBJECT);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitFieldInsn(Opcodes.PUTFIELD, enhancedClassName, Enhancer.FIELD_ENHANCED_TYPE,
            Enhancer.DESCRIPTOR_CLASS);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitFieldInsn(Opcodes.PUTFIELD, enhancedClassName, Enhancer.FIELD_ENHANCED_SESSION,
            Enhancer.DESCRIPTOR_SESSION);

    mv.visitInsn(Opcodes.RETURN);

    final Label l1 = new Label();
    mv.visitLabel(l1);
    mv.visitLocalVariable(Enhancer.THIS, descEnhancer, null, l0, l1, 0);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.batoo.jpa.core.impl.instance.Enhancer.java

License:Open Source License

private static void createOverrriddenMethod(final String enhancingClassName, final String enhancedClassName,
        final String descEnhancer, final ClassWriter cw, Method method) {
    final String methodDescription = Enhancer.makeDescription(method.getReturnType(),
            method.getParameterTypes());

    // TODO Exception types
    for (int i = 0; i < method.getExceptionTypes().length; i++) {
    }/* w  w w.  j  av a 2s.c  o m*/

    final MethodVisitor mv = cw.visitMethod(method.getModifiers(), method.getName(), methodDescription, null,
            null);
    mv.visitCode();

    // this.__enhanced_$$__check();
    final Label lCheck = new Label();
    mv.visitLabel(lCheck);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, enhancedClassName, Enhancer.METHOD_ENHANCED_CHECK,
            Enhancer.makeDescription(Void.TYPE));

    mv.visitVarInsn(Opcodes.ALOAD, 0); // load this

    // infer the method parameters
    for (int i = 0, r = 1; i < method.getParameterTypes().length; i++, r++) {
        final Class<?> paramClass = method.getParameterTypes()[i];
        mv.visitVarInsn(Enhancer.getLoadType(paramClass), r); // load parameter

        if ((paramClass == Double.TYPE) || (paramClass == Long.TYPE)) {
            r++;
        }
    }

    // super.method(...);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, enhancingClassName, method.getName(), methodDescription);

    if (method.getReturnType() != Void.TYPE) {
        // non void return
        mv.visitInsn(Enhancer.getReturnType(method.getReturnType()));
    } else {
        // void return
        mv.visitInsn(Opcodes.RETURN);
    }

    final Label lOut = new Label();
    mv.visitLabel(lOut);
    Enhancer.registerLocals(descEnhancer, method, mv, lCheck, lOut);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.boretti.drools.integration.drools5.DroolsClassVisitor.java

License:Open Source License

@Override
public void visitEnd() {
    FieldVisitor fv = null;/*ww w.ja va 2 s  .c  om*/
    if (isNeedChangeForBoth()) {
        fv = super.visitField(Opcodes.ACC_PRIVATE, DROOLS_FIELD_NAME, Type.BOOLEAN_TYPE.getDescriptor(), null,
                null);
        if (fv != null) {
            AnnotationVisitor av = fv.visitAnnotation(Type.getType(Generated.class).getDescriptor(), true);
            AnnotationVisitor value = av.visitArray("value");
            value.visit("", "Generated by Drools5IntegrationHelper Maven plugin");
            value.visitEnd();
            av.visit("date", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz").format(current));
            av.visitEnd();
            fv.visitEnd();
        }
    }
    if (isNeedChangeForField()) {
        fv = super.visitField(Opcodes.ACC_PRIVATE, DROOLS_FIELD_RULE,
                Type.getType(RuleBase.class).getDescriptor(), null, null);
        if (fv != null) {
            AnnotationVisitor av = fv.visitAnnotation(Type.getType(Generated.class).getDescriptor(), true);
            AnnotationVisitor value = av.visitArray("value");
            value.visit("", "Generated by Drools5IntegrationHelper Maven plugin");
            value.visitEnd();
            av.visit("date", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz").format(current));
            av.visitEnd();
            fv.visitEnd();
        }
        MethodVisitor mv = super.visitMethod(Opcodes.ACC_PRIVATE, DROOLS_METHOD_RUN, "()V", null, null);
        AnnotationVisitor av = mv.visitAnnotation(Type.getType(Generated.class).getDescriptor(), true);
        AnnotationVisitor value = av.visitArray("value");
        value.visit("", "Generated by Drools5IntegrationHelper Maven plugin");
        value.visitEnd();
        av.visit("date", new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ssz").format(current));
        av.visitEnd();
        mv.visitCode();
        Label start = new Label();
        mv.visitLabel(start);
        Label doIt = new Label();
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, Type.getObjectType(me).getInternalName(), DROOLS_FIELD_NAME,
                Type.BOOLEAN_TYPE.getDescriptor());
        mv.visitJumpInsn(Opcodes.IFEQ, doIt);
        mv.visitInsn(Opcodes.RETURN);
        mv.visitLabel(doIt);
        mv.visitFrame(Opcodes.F_SAME, 1, new Object[] { Type.getObjectType(me).getInternalName() }, 0,
                new Object[] {});
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitFieldInsn(Opcodes.GETFIELD, Type.getObjectType(me).getInternalName(), DROOLS_FIELD_RULE,
                Type.getType(RuleBase.class).getDescriptor());
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getType(RuleBase.class).getInternalName(),
                "newStatelessSession", "()Lorg/drools/StatelessSession;");
        mv.visitInsn(Opcodes.DUP);
        mv.visitLdcInsn(FIELD_NAME_LOGGER);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, Type.getType(Object.class).getInternalName(), "getClass",
                "()Ljava/lang/Class;");
        mv.visitMethodInsn(Opcodes.INVOKESTATIC, Type.getType(org.apache.log4j.Logger.class).getInternalName(),
                "getLogger", "(Ljava/lang/Class;)Lorg/apache/log4j/Logger;");
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getType(StatelessSession.class).getInternalName(),
                "setGlobal", "(Ljava/lang/String;Ljava/lang/Object;)V");
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEINTERFACE, Type.getType(StatelessSession.class).getInternalName(),
                "execute", "(Ljava/lang/Object;)V");
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitInsn(Opcodes.ICONST_1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, Type.getObjectType(me).getInternalName(), DROOLS_FIELD_NAME,
                Type.BOOLEAN_TYPE.getDescriptor());
        mv.visitInsn(Opcodes.RETURN);
        Label end = new Label();
        mv.visitLabel(end);
        mv.visitLocalVariable("this", Type.getObjectType(me).getDescriptor(), null, start, end, 0);
        mv.visitMaxs(4, 1);
        mv.visitEnd();
    }
    super.visitEnd();
}

From source file:org.brutusin.instrumentation.Instrumentator.java

License:Apache License

private void addTraceReturn() {

    InsnList il = this.mn.instructions;

    Iterator<AbstractInsnNode> it = il.iterator();
    while (it.hasNext()) {
        AbstractInsnNode abstractInsnNode = it.next();

        switch (abstractInsnNode.getOpcode()) {
        case Opcodes.RETURN:
            il.insertBefore(abstractInsnNode, getVoidReturnTraceInstructions());
            break;
        case Opcodes.IRETURN:
        case Opcodes.LRETURN:
        case Opcodes.FRETURN:
        case Opcodes.ARETURN:
        case Opcodes.DRETURN:
            il.insertBefore(abstractInsnNode, getReturnTraceInstructions());
        }//www. j  a va2  s.  c  om
    }
}

From source file:org.cacheonix.impl.transformer.ByteInstructionTest.java

License:LGPL

/**
 * Test method for {@link ByteInstruction#getReturnCode(String desc)} .
 *//*  ww  w . j a v  a  2s .  c  o m*/
public void testGetReturnCode() {

    String desc = "(IF)V";
    int ret = ByteInstruction.getReturnCode(desc);
    assertEquals(ret, Opcodes.RETURN);

    desc = "(IF)I";
    ret = ByteInstruction.getReturnCode(desc);
    assertEquals(ret, Opcodes.IRETURN);

    desc = "(IF)D";
    ret = ByteInstruction.getReturnCode(desc);
    assertEquals(ret, Opcodes.DRETURN);

    desc = "(IF)Ljava/lang/Object;";
    ret = ByteInstruction.getReturnCode(desc);
    assertEquals(ret, Opcodes.ARETURN);

}

From source file:org.codehaus.groovy.reflection.MethodHandleFactory.java

License:Apache License

private static void genConstructor(ClassWriter cw, final String superClass) {
    MethodVisitor mv;// w w w. ja v  a  2  s . co  m
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superClass, "<init>", "()V");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.codehaus.groovy.runtime.callsite.CallSiteGenerator.java

License:Apache License

private static void genConstructor(ClassWriter cw, final String superClass, String internalName) {
    MethodVisitor mv;/*from  w  w  w.  j  av a2 s .  c  o m*/
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>",
            "(Lorg/codehaus/groovy/runtime/callsite/CallSite;Lgroovy/lang/MetaClassImpl;Lgroovy/lang/MetaMethod;[Ljava/lang/Class;Ljava/lang/reflect/Constructor;)V",
            null, null);
    mv.visitCode();
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitVarInsn(Opcodes.ALOAD, 2);
    mv.visitVarInsn(Opcodes.ALOAD, 3);
    mv.visitVarInsn(Opcodes.ALOAD, 4);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, superClass, "<init>",
            "(Lorg/codehaus/groovy/runtime/callsite/CallSite;Lgroovy/lang/MetaClassImpl;Lgroovy/lang/MetaMethod;[Ljava/lang/Class;)V",
            false);

    mv.visitVarInsn(Opcodes.ALOAD, 5);
    mv.visitFieldInsn(Opcodes.PUTSTATIC, internalName, "__constructor__", "Ljava/lang/reflect/Constructor;");

    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:org.coldswap.transformer.ClInitTransformer.java

License:Open Source License

@SuppressWarnings("unchecked")
@Override//from   www  .  j a  v a 2s  .  co m
public byte[] transform(ClassLoader classLoader, String s, Class<?> aClass, ProtectionDomain protectionDomain,
        byte[] bytes) throws IllegalClassFormatException {
    if (s != null && !"".equals(s)) {
        for (String pack : ClassUtil.skipTransforming) {
            if (s.startsWith(pack)) {
                return bytes;
            }
        }

        ClassNode cn = new ClassNode(Opcodes.ASM5);
        ClassReader cr = new ClassReader(bytes);
        ClassWriter cw = new ClassWriter(cr, ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
        // create adapter for method insertion.
        cr.accept(cn, 0);
        // insert <clinit>V if it is not inserted
        List methods = cn.methods;
        boolean clInitFound = false;
        for (MethodNode methodNode : (List<MethodNode>) methods) {
            if ("<clinit>".equals(methodNode.name)) {
                clInitFound = true;
            }
        }

        if (!clInitFound) {
            MethodNode mn = new MethodNode(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
            InsnList insnList = mn.instructions;
            insnList.add(new LabelNode());
            insnList.add(new InsnNode(Opcodes.RETURN));
            cn.methods.add(mn);
        }

        cn.accept(cw);
        byte[] toRet = cw.toByteArray();
        if (toRet != null) {
            logger.info("Successful transformation!");
            return toRet;
        } else {
            logger.severe("Could not transform class");
            return bytes;
        }
    }
    return bytes;
}

From source file:org.coldswap.util.ByteCodeGenerator.java

License:Open Source License

/**
 * Creates a new class containing the new static field.
 *
 * @param classNode        containing the old class.
 * @param fieldNode        containing the old field.
 * @param initInstructions a list of instructions that goes into <clinit>.
 * @param className        the name of the new class to be generated.
 * @return an array of bytes which builds the new class.
 */// www.  j  a v a 2s . c  o m
@SuppressWarnings("unchecked")
public static byte[] newFieldClass(ClassNode classNode, FieldNode fieldNode, InsnList initInstructions,
        String className) {
    ClassNode newClass = new ClassNode();
    newClass.version = classNode.version;
    newClass.access = Opcodes.ACC_PUBLIC;
    newClass.signature = "L" + className + ";";
    newClass.name = className;
    newClass.superName = "java/lang/Object";
    newClass.fields.add(
            new FieldNode(fieldNode.access, fieldNode.name, fieldNode.desc, fieldNode.desc, fieldNode.value));
    if (initInstructions != null) {
        if (initInstructions.size() > 0) {
            MethodNode mn = new MethodNode(Opcodes.ACC_STATIC, "<clinit>", "()V", null, null);
            InsnList il = mn.instructions;
            il.add(new LabelNode());
            il.add(initInstructions);
            il.add(new FieldInsnNode(Opcodes.PUTSTATIC, className, fieldNode.name, fieldNode.desc));
            il.add(new InsnNode(Opcodes.RETURN));
            newClass.methods.add(mn);
        }
    }

    ClassWriter newCWriter = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS);
    newClass.accept(newCWriter);
    return newCWriter.toByteArray();
}

From source file:org.compass.core.util.reflection.asm.AsmReflectionConstructorGenerator.java

License:Apache License

private static void createConstructor(ClassWriter cw) {
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();/*ww w . j  a  va2 s . co m*/
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}