Example usage for org.objectweb.asm MethodVisitor visitVarInsn

List of usage examples for org.objectweb.asm MethodVisitor visitVarInsn

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Introduction

In this page you can find the example usage for org.objectweb.asm MethodVisitor visitVarInsn.

Prototype

public void visitVarInsn(final int opcode, final int var)

Source Link

Document

Visits a local variable instruction.

Usage

From source file:com.asakusafw.dag.compiler.builtin.MasterJoinOperatorGenerator.java

License:Apache License

private static void performJoin(MethodVisitor method, Context context, UserOperator operator,
        LocalVarRef masterRef, LocalVarRef txRef, FieldRef impl, Map<OperatorProperty, FieldRef> dependencies,
        ClassDescription target) {/*from  w  w w.j a v a2s.c  o  m*/
    OperatorInput master = operator.getInput(MasterJoin.ID_INPUT_MASTER);
    OperatorInput tx = operator.getInput(MasterJoin.ID_INPUT_TRANSACTION);
    OperatorOutput joined = operator.getOutput(MasterJoin.ID_OUTPUT_JOINED);

    method.visitVarInsn(Opcodes.ALOAD, 0);
    getField(method, target, FIELD_BUFFER, typeOf(joined.getDataType()));
    LocalVarRef bufferVar = putLocalVar(method, Type.OBJECT, 3);

    bufferVar.load(method);
    method.visitMethodInsn(Opcodes.INVOKEVIRTUAL, typeOf(joined.getDataType()).getInternalName(), "reset",
            Type.getMethodDescriptor(Type.VOID_TYPE), false);

    List<PropertyMapping> mappings = Invariants
            .safe(() -> JoinedModelUtil.getPropertyMappings(context.getClassLoader(), operator));
    Map<OperatorInput, ValueRef> inputs = new HashMap<>();
    Map<OperatorOutput, ValueRef> outputs = new HashMap<>();
    inputs.put(master, masterRef);
    inputs.put(tx, txRef);
    outputs.put(joined, bufferVar);
    mapping(method, context.getDataModelLoader(), mappings, inputs, outputs);
    bufferVar.load(method);
}

From source file:com.asakusafw.dag.compiler.builtin.SummarizeOperatorGenerator.java

License:Apache License

static ClassDescription generateMapperClass(Context context, UserOperator operator, ClassDescription outer) {
    ClassDescription target = getMapperName(outer);

    OperatorInput input = operator.getInput(Summarize.ID_INPUT);
    OperatorOutput output = operator.getOutput(Summarize.ID_OUTPUT);

    ClassWriter writer = newWriter(target, Object.class, Function.class);
    writer.visitOuterClass(outer.getInternalName(), target.getSimpleName(), null);

    FieldRef buffer = defineField(writer, target, "buffer", typeOf(output.getDataType()));
    defineEmptyConstructor(writer, Object.class, method -> {
        method.visitVarInsn(Opcodes.ALOAD, 0);
        getNew(method, output.getDataType());
        putField(method, buffer);/*from w ww .  ja  v  a2  s .co m*/
    });

    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, "apply",
            Type.getMethodDescriptor(typeOf(Object.class), typeOf(Object.class)), null, null);

    LocalVarRef inputVar = cast(method, 1, input.getDataType());
    buffer.load(method);
    LocalVarRef outputVar = putLocalVar(method, Type.OBJECT, 2);

    outputVar.load(method);
    resetDataModel(method, output.getDataType());

    List<PropertyFolding> foldings = Invariants
            .safe(() -> SummarizedModelUtil.getPropertyFoldings(context.getClassLoader(), operator));
    DataModelReference inputModel = context.getDataModelLoader().load(input.getDataType());
    DataModelReference outputModel = context.getDataModelLoader().load(output.getDataType());
    Set<PropertyReference> nullChecked = new HashSet<>();
    for (PropertyFolding folding : foldings) {
        PropertyMapping mapping = folding.getMapping();
        Aggregation aggregation = folding.getAggregation();
        PropertyReference src = Invariants.requireNonNull(inputModel.findProperty(mapping.getSourceProperty()));
        PropertyReference dst = Invariants
                .requireNonNull(outputModel.findProperty(mapping.getDestinationProperty()));
        mapping(method, target, aggregation, src, dst, inputVar, outputVar, nullChecked);
    }

    outputVar.load(method);
    method.visitInsn(Opcodes.ARETURN);
    method.visitMaxs(0, 0);
    method.visitEnd();

    if (nullChecked.isEmpty() == false) {
        defineCheckNull(writer, operator, inputModel);
    }

    return context.addClassFile(new ClassData(target, writer::toByteArray));
}

From source file:com.asakusafw.dag.compiler.builtin.Util.java

License:Apache License

static void setOperatorField(MethodVisitor method, UserOperator operator, FieldRef field) {
    method.visitVarInsn(Opcodes.ALOAD, 0);
    AsmUtil.getNew(method, operator.getImplementationClass());
    AsmUtil.putField(method, field);/*from   w  w w. j av a 2s  .c o m*/
}

From source file:com.asakusafw.dag.compiler.builtin.Util.java

License:Apache License

static void getGroupList(MethodVisitor method, Context context, OperatorInput input) {
    method.visitVarInsn(Opcodes.ALOAD, 1);
    getInt(method, context.getGroupIndex(input));
    method.visitMethodInsn(Opcodes.INVOKESTATIC, AsmUtil.typeOf(CoGroupOperationUtil.class).getInternalName(),
            "getList", Type.getMethodDescriptor(AsmUtil.typeOf(List.class),
                    AsmUtil.typeOf(CoGroupOperation.Input.class), Type.INT_TYPE),
            false);// w w w.  ja  v a  2s.  c  om
}

From source file:com.asakusafw.dag.compiler.builtin.Util.java

License:Apache License

static void getGroupIterable(MethodVisitor method, Context context, OperatorInput input) {
    method.visitVarInsn(Opcodes.ALOAD, 1);
    getInt(method, context.getGroupIndex(input));
    method.visitMethodInsn(Opcodes.INVOKESTATIC, AsmUtil.typeOf(CoGroupOperationUtil.class).getInternalName(),
            "getIterable", Type.getMethodDescriptor(AsmUtil.typeOf(Iterable.class),
                    AsmUtil.typeOf(CoGroupOperation.Input.class), Type.INT_TYPE),
            false);/* ww w. ja v  a  2  s  .c  om*/
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds an empty constructor.//  w ww. j  av  a2  s.  c  o  m
 * @param writer the target class
 * @param superClass the super class
 * @param body the constructor body
 */
public static void defineEmptyConstructor(ClassWriter writer, Class<?> superClass,
        Consumer<MethodVisitor> body) {
    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE), null, null);
    method.visitVarInsn(Opcodes.ALOAD, 0);
    method.visitMethodInsn(Opcodes.INVOKESPECIAL, typeOf(superClass).getInternalName(), CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE), false);
    body.accept(method);
    method.visitInsn(Opcodes.RETURN);
    method.visitMaxs(0, 0);
    method.visitEnd();
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Adds an adapter constructor./*  w  w  w  . ja  v  a 2  s .c o  m*/
 * @param writer the target class
 * @param superClass the super class
 * @param body the constructor body
 */
public static void defineAdapterConstructor(ClassWriter writer, Class<?> superClass,
        Consumer<MethodVisitor> body) {
    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE, typeOf(VertexProcessorContext.class)), null, null);
    method.visitVarInsn(Opcodes.ALOAD, 0);
    method.visitVarInsn(Opcodes.ALOAD, 1);
    method.visitMethodInsn(Opcodes.INVOKESPECIAL, typeOf(superClass).getInternalName(), CONSTRUCTOR_NAME,
            Type.getMethodDescriptor(Type.VOID_TYPE, typeOf(VertexProcessorContext.class)), false);
    body.accept(method);
    method.visitInsn(Opcodes.RETURN);
    method.visitMaxs(0, 0);
    method.visitEnd();
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Performs {@code T_STORE} instruction.
 * @param method the target method//from  w ww  .j a  v  a  2  s .c o  m
 * @param sort the target type sort
 * @param index the target local variable index
 * @return the target local variable ref
 */
public static LocalVarRef putLocalVar(MethodVisitor method, int sort, int index) {
    int load;
    int store;
    switch (sort) {
    case Type.BOOLEAN:
    case Type.BYTE:
    case Type.SHORT:
    case Type.CHAR:
    case Type.INT:
        load = Opcodes.ILOAD;
        store = Opcodes.ISTORE;
        break;
    case Type.LONG:
        load = Opcodes.LLOAD;
        store = Opcodes.LSTORE;
        break;
    case Type.FLOAT:
        load = Opcodes.FLOAD;
        store = Opcodes.FSTORE;
        break;
    case Type.DOUBLE:
        load = Opcodes.DLOAD;
        store = Opcodes.DSTORE;
        break;
    case Type.ARRAY:
    case Type.OBJECT:
        load = Opcodes.ALOAD;
        store = Opcodes.ASTORE;
        break;
    default:
        throw new AssertionError(sort);
    }
    method.visitVarInsn(store, index);
    return new LocalVarRef(load, index);
}

From source file:com.asakusafw.dag.compiler.codegen.AsmUtil.java

License:Apache License

/**
 * Cast the local variable.//from  w ww.j  a v  a  2 s.  com
 * @param method the writer
 * @param index the variable index
 * @param type the target type
 * @return the target variable
 */
public static LocalVarRef cast(MethodVisitor method, int index, TypeDescription type) {
    method.visitVarInsn(Opcodes.ALOAD, index);
    method.visitTypeInsn(Opcodes.CHECKCAST, AsmUtil.typeOf(type).getInternalName());
    return putLocalVar(method, Type.OBJECT, index);
}

From source file:com.asakusafw.dag.compiler.codegen.OperationGenerator.java

License:Apache License

private static void addConstructor(ClassWriter writer, ClassDescription target, List<VertexElement> elements,
        Function<VertexElement, String> ids) {
    MethodVisitor method = writer.visitMethod(Opcodes.ACC_PUBLIC, "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE, typeOf(OperationAdapter.Context.class)), null, null);
    method.visitVarInsn(Opcodes.ALOAD, 0);
    method.visitMethodInsn(Opcodes.INVOKESPECIAL, typeOf(Object.class).getInternalName(), "<init>",
            Type.getMethodDescriptor(Type.VOID_TYPE), false);

    method.visitVarInsn(Opcodes.ALOAD, 0);
    method.visitVarInsn(Opcodes.ALOAD, 1);
    method.visitFieldInsn(Opcodes.PUTFIELD, target.getInternalName(), FIELD_CONTEXT,
            typeOf(OperationAdapter.Context.class).getDescriptor());

    for (VertexElement element : elements) {
        method.visitVarInsn(Opcodes.ALOAD, 0);
        method.visitMethodInsn(Opcodes.INVOKESPECIAL, target.getInternalName(), ids.apply(element),
                Type.getMethodDescriptor(Type.VOID_TYPE), false);
    }//from   w w w .j  ava  2 s  .c o m
    method.visitInsn(Opcodes.RETURN);
    method.visitMaxs(0, 0);
    method.visitEnd();
}