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

Introduction

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

Prototype

InsnList

Source Link

Usage

From source file:de.sanandrew.core.manpack.transformer.TransformPlayerDismountCtrl.java

License:Creative Commons License

/**
 * Transforms the EntityPlayer.class by hooking into the updateRidden method and adding a call to _SAP_canDismountOnInput
 * in order for the ridden entity to control whether or not the rider can dismount via sneaking.
 *
 * @param bytes     the class bytes to be transformed
 * @return the transformed class bytes/*from   w  ww  .j a va 2 s. co m*/
 */
private static byte[] transformPlayer(byte[] bytes) {
    ClassNode clazz = ASMHelper.createClassNode(bytes);
    MethodNode method = ASMHelper.findMethod(clazz, ASMNames.MD_PLAYER_UPDATE_RIDDEN);

    InsnList needle = new InsnList();
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_PLAYER_WORLD_OBJ));
    needle.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_WORLD_IS_REMOTE));
    LabelNode ln1 = new LabelNode();
    needle.add(new JumpInsnNode(Opcodes.IFNE, ln1));
    needle.add(new VarInsnNode(Opcodes.ALOAD, 0));
    needle.add(ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_PLAYER_IS_SNEAKING, false));
    needle.add(new JumpInsnNode(Opcodes.IFEQ, ln1));

    AbstractInsnNode insertPoint = ASMHelper.findLastNodeFromNeedle(method.instructions, needle);

    InsnList injectList = new InsnList();
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(ASMHelper.getFieldInsnNode(Opcodes.GETFIELD, ASMNames.FD_PLAYER_RIDING_ENTITY));
    injectList.add(new VarInsnNode(Opcodes.ALOAD, 0));
    injectList.add(
            ASMHelper.getMethodInsnNode(Opcodes.INVOKEVIRTUAL, ASMNames.MD_SAP_CAN_DISMOUNT_ON_INPUT, false));
    injectList.add(new JumpInsnNode(Opcodes.IFEQ, ((JumpInsnNode) insertPoint).label));

    method.instructions.insert(insertPoint, injectList);

    bytes = ASMHelper.createBytes(clazz, /*ClassWriter.COMPUTE_FRAMES |*/ ClassWriter.COMPUTE_MAXS);

    return bytes;
}

---

From source file:de.scoopgmbh.copper.instrument.TryCatchBlockHandler.java

License:Apache License

@SuppressWarnings("unchecked")
public void instrument(ClassNode cn) {
    //if (1 == 1) return;

    for (MethodNode m : (List<MethodNode>) cn.methods) {
        if (!m.exceptions.contains(INTERRUPT_EXCEPTION_NAME) || m.tryCatchBlocks.isEmpty()) {
            continue;
        }/*from   w w  w .  j  a  v  a2  s . co  m*/
        logger.info("Instrument " + cn.name + "." + m.name);
        HashSet<Label> labels = new HashSet<Label>();
        for (TryCatchBlockNode catchNode : (List<TryCatchBlockNode>) m.tryCatchBlocks) {
            if (labels.contains(catchNode.handler.getLabel())) {
                // some handlers share their handling code - check it out to prevent double instrumentation
                logger.info("skipping node");
                continue;
            }
            labels.add(catchNode.handler.getLabel());

            LabelNode labelNode = catchNode.handler;
            AbstractInsnNode lineNumberNode = labelNode.getNext() instanceof LineNumberNode
                    ? labelNode.getNext()
                    : labelNode;
            FrameNode frameNode = (FrameNode) lineNumberNode.getNext();
            VarInsnNode varInsnNode = (VarInsnNode) frameNode.getNext();
            AbstractInsnNode insertPoint = varInsnNode;

            if (catchNode.type == null) {
                // this is probably a finally block;
                if (insertPoint.getNext() != null && insertPoint.getNext() instanceof LabelNode) {
                    insertPoint = insertPoint.getNext();
                }
            }

            LabelNode labelNode4ifeg = new LabelNode();
            InsnList newCode = new InsnList();
            newCode.add(new VarInsnNode(Opcodes.ALOAD, varInsnNode.var));
            newCode.add(new TypeInsnNode(Opcodes.INSTANCEOF, INTERRUPT_EXCEPTION_NAME));
            newCode.add(new JumpInsnNode(Opcodes.IFEQ, labelNode4ifeg));
            newCode.add(new VarInsnNode(Opcodes.ALOAD, varInsnNode.var));
            newCode.add(new TypeInsnNode(Opcodes.CHECKCAST, INTERRUPT_EXCEPTION_NAME));
            newCode.add(new InsnNode(Opcodes.ATHROW));
            newCode.add(labelNode4ifeg);
            m.instructions.insert(insertPoint, newCode);
        }
    }
}

---

From source file:de.tuberlin.uebb.jbop.access.ConstructorBuilder.java

License:Open Source License

/**
 * Creates a constructor with all fields of <code>object</code> as parameters
 * and adds it to the method-List of <code>node</code>.
 * A List with all Values (in order of the parameters) is returned.
 * /*  w w w .ja  v  a2s  . c om*/
 * If such a constructor already exists, only the parameters are returned,
 * no change is made to to the classNode.
 * 
 * @param node
 *          the ClassNode
 * @param object
 *          the input Object
 * @return the value list
 * @throws JBOPClassException
 *           if the Constructor couldn't be created.
 */
public static List<Object> createConstructor(final ClassNode node, final Object object)
        throws JBOPClassException {
    final Class<? extends Object> clazz = object.getClass();
    int param = 1;
    final StringBuilder desc = new StringBuilder("(");
    final MethodNode constructor = createMethodNode(node);
    final List<Object> params = new ArrayList<>();
    for (final FieldNode field : node.fields) {
        final InsnList instructions = new InsnList();
        param = createInstructions(param, field, node, instructions);
        final Object value = getValue(clazz, field, object);
        params.add(value);
        constructor.instructions.add(instructions);
        desc.append(expand(field.desc, false));
    }
    constructor.instructions.add(new InsnNode(Opcodes.RETURN));
    desc.append(")V");
    constructor.desc = desc.toString();
    for (final MethodNode method : node.methods) {
        if ("<init>".equals(method.name)) {
            if (constructor.desc.equals(method.desc)) {
                return params;
            }
        }
    }
    node.methods.add(constructor);
    return params;
}

---

From source file:de.tuberlin.uebb.jbop.access.ConstructorBuilder.java

License:Open Source License

private static MethodNode createMethodNode(final ClassNode node) {
    final MethodNode constructor = new MethodNode();
    constructor.access = Opcodes.ACC_PUBLIC;
    constructor.name = "<init>";
    constructor.exceptions = Collections.emptyList();
    final InsnList list = new InsnList();
    // currently only call to noarg super constructor is supported
    final AbstractInsnNode nThis = new VarInsnNode(Opcodes.ALOAD, 0);
    final AbstractInsnNode nSuperConstructor = new MethodInsnNode(Opcodes.INVOKESPECIAL, node.superName,
            "<init>", "()V");
    list.add(nThis);/* w  w w .  j  a  v a2s  .co  m*/
    list.add(nSuperConstructor);
    constructor.instructions = list;
    return constructor;
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.array.FieldArrayValueInlinerTest.java

License:Open Source License

private InsnList initArray() {

    final InsnList list = new InsnList();
    list.add(new VarInsnNode(ALOAD, 0));
    list.add(new InsnNode(ICONST_1));
    list.add(new TypeInsnNode(ANEWARRAY, "de/tuberlin/uebb/jbop/optimizer/array/A"));
    list.add(new InsnNode(DUP));
    list.add(new InsnNode(ICONST_0));
    list.add(new TypeInsnNode(NEW, "de/tuberlin/uebb/jbop/optimizer/array/A"));
    list.add(new InsnNode(DUP));
    list.add(new MethodInsnNode(INVOKESPECIAL, "de/tuberlin/uebb/jbop/optimizer/array/A", "<init>", "()V"));
    list.add(new InsnNode(AASTORE));
    list.add(new FieldInsnNode(PUTFIELD, "de/tuberlin/uebb/jbop/optimizer/array/ChainedTestClass", "a",
            "[Lde/tuberlin/uebb/jbop/optimizer/array/A;"));
    return list;/*from   w  w w . j  ava  2  s .  c  o m*/
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.ClassNodeBuilder.java

License:Open Source License

/**
 * Appends a Constructor with the given descriptors.
 * /*ww  w  . j a v  a2s  .co  m*/
 * @param constructorDesc
 *          the constructor desc
 * @param superConstructorDesc
 *          the super constructor desc
 * @return the class node builder
 */
public ClassNodeBuilder addConstructor(final String constructorDesc, final String superConstructorDesc) {
    if (isInterface) {
        return this;
    }
    addMethod("<init>", constructorDesc);//
    lastConstructorVarIndex = 1;
    final InsnList list = new InsnList();
    list.add(new VarInsnNode(Opcodes.ALOAD, 0));
    final Type methodType = Type.getMethodType(superConstructorDesc);
    for (final Type parameterType : methodType.getArgumentTypes()) {
        list.add(new VarInsnNode(parameterType.getOpcode(ILOAD), lastConstructorVarIndex));
        lastConstructorVarIndex += parameterType.getSize();
    }
    list.add(new MethodInsnNode(Opcodes.INVOKESPECIAL, classNode.superName, "<init>", superConstructorDesc));
    list.add(new InsnNode(Opcodes.RETURN));
    addToConstructor(list);
    return this;
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.ClassNodeBuilder.java

License:Open Source License

/**
 * Initializes a classField in the default lastConstructor
 * (eg: if fieldType of field "field" is "TestObject", field = new TestObject() is called).
 * /*from   w  w w. jav a 2 s  .c  o m*/
 * Numbers and Strings are used to assign "field", every other value leads to new Object.
 * 
 * @param object
 *          the object to Use.
 * @return the abstract optimizer test
 */
public ClassNodeBuilder initWith(final Object object) {
    if (isInterface) {
        return this;
    }
    final InsnList list = new InsnList();
    if (object instanceof String || object instanceof Number || object instanceof Boolean
            || object instanceof Character) {
        list.add(new VarInsnNode(Opcodes.ALOAD, 0));
        final AbstractInsnNode numberNode = NodeHelper.getInsnNodeFor(object);
        list.add(numberNode);
        if (lastField.desc.startsWith("L") && object instanceof Number) {
            list.add(ConstructorBuilder.getBoxingNode(lastField));
        }
        list.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, lastField.name, lastField.desc));
    } else {
        list.add(new VarInsnNode(ALOAD, 0));
        list.add(newObject(lastField.desc));
        list.add(new MethodInsnNode(INVOKESPECIAL,
                StringUtils.removeEnd(StringUtils.removeStart(lastField.desc, "L"), ";"), "<init>", "()V"));
        list.add(new FieldInsnNode(Opcodes.PUTFIELD, classNode.name, lastField.name, lastField.desc));

    }
    addToConstructor(list);
    return this;
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.ClassNodeBuilder.java

License:Open Source License

/**
 * Creates Instruction to instantiate a new Object of type "desc".
 * // ww  w  .  jav a  2  s. c  o m
 * @param desc
 *          the desc
 * @return the insn list
 */
private InsnList newObject(final String desc) {
    final InsnList list = new InsnList();
    final String fieldDesc = StringUtils.removeEnd(StringUtils.removeStart(desc, "L"), ";");
    final TypeInsnNode node = new TypeInsnNode(Opcodes.NEW, fieldDesc);
    list.add(node);
    list.add(new InsnNode(DUP));
    return list;
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.ClassNodeBuilder.java

License:Open Source License

/**
 * Inits the multi array with.//from   ww  w  .  j  a  v a  2  s .  c om
 * 
 * @param value
 *          the value
 * @param indexes
 *          the indexes
 * @return the class node builder
 */
public ClassNodeBuilder initMultiArrayWith(final Object value, final int... indexes) {
    if (isInterface) {
        return this;
    }
    final InsnList list = new InsnList();
    list.add(new VarInsnNode(Opcodes.ALOAD, 0));
    list.add(new FieldInsnNode(Opcodes.GETFIELD, classNode.name, lastField.name, lastField.desc));
    for (int i = 0; i < indexes.length - 1; ++i) {
        list.add(NodeHelper.getInsnNodeFor(indexes[i]));
        list.add(new InsnNode(Opcodes.AALOAD));
    }
    list.add(NodeHelper.getInsnNodeFor(indexes[indexes.length - 1]));
    list.add(NodeHelper.getInsnNodeFor(value));
    final Type elementType = Type.getType(lastField.desc).getElementType();
    if (elementType.getDescriptor().startsWith("L")) {
        list.add(new InsnNode(Opcodes.AASTORE));
    } else {
        list.add(new InsnNode(toPrimitive(Type.getType(value.getClass())).getOpcode(Opcodes.IASTORE)));

    }
    addToConstructor(list);
    return this;
}

---

From source file:de.tuberlin.uebb.jbop.optimizer.ClassNodeBuilder.java

License:Open Source License

private void initArrayInternal(final int opcode, final Object... values) {
    final InsnList list = new InsnList();
    final int length = values.length;
    initArray(length);/*from   w w  w.j a  v a  2 s  .  co  m*/
    int index = 0;
    for (final Object number : values) {
        list.add(new VarInsnNode(Opcodes.ALOAD, lastConstructorVarIndex));
        final AbstractInsnNode indexNode = NodeHelper.getInsnNodeFor(index++);
        list.add(indexNode);
        final AbstractInsnNode numberNode = NodeHelper.getInsnNodeFor(number);
        list.add(numberNode);
        if (number instanceof Number && opcode == Opcodes.ASTORE) {
            list.add(ConstructorBuilder.getBoxingNode(lastField));
        }
        list.add(new InsnNode(opcode));
    }
    addToConstructor(list);
}

---

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