Example usage for org.objectweb.asm MethodVisitor visitEnd

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

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Introduction

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

Prototype

public void visitEnd()

Source Link

Document

Visits the end of the method.

Usage

From source file:erjang.EFun.java

License:Apache License

static byte[] gen_fun_class_data(int arity) {

    String self_type = EFUN_TYPE.getInternalName() + arity;

    ClassWriter cw = new ClassWriter(true);
    cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC | Opcodes.ACC_ABSTRACT, self_type, null,
            EFUN_TYPE.getInternalName(), null);

    make_invoke_method(cw, self_type, arity);

    CompilerVisitor.make_invoketail_method(cw, self_type, arity, 0);

    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "arity", "()I", null, null);
    mv.visitCode();/*from   www  .  j a v a  2s  .c o m*/
    mv.visitLdcInsn(new Integer(arity));
    mv.visitInsn(Opcodes.IRETURN);
    mv.visitMaxs(2, 2);
    mv.visitEnd();

    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "invoke", "(" + EPROC_TYPE.getDescriptor()
            + EOBJECT_ARR_TYPE.getDescriptor() + ")" + EOBJECT_TYPE.getDescriptor(), null, PAUSABLE_EX);
    mv.visitCode();
    mv.visitVarInsn(Opcodes.ALOAD, 0); // load this
    mv.visitVarInsn(Opcodes.ALOAD, 1); // load proc
    for (int i = 0; i < arity; i++) {
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        push_int(mv, i);
        mv.visitInsn(Opcodes.AALOAD);
    }

    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, self_type, "invoke", EUtil.getSignature(arity, true));

    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(arity + 2, arity + 2);
    mv.visitEnd();

    mv = cw.visitMethod(Opcodes.ACC_PROTECTED, "<init>", "()V", null, null);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, EFUN_TYPE.getInternalName(), "<init>", "()V");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    make_cast_method(cw, arity);

    cw.visitEnd();

    byte[] data = cw.toByteArray();
    return data;
}

From source file:erjang.EFun.java

License:Apache License

public static EFun get_fun_with_handler(String module, String function, int arity, EFunHandler handler,
        ClassLoader loader) {// ww w  .  jav a  2s.  co m
    String signature = module + function + arity;
    Constructor<? extends EFun> h = handlers.get(signature);

    if (h == null) {

        get_fun_class(arity);

        String safe_function = JAVA_ID.matcher(function).matches() ? function : make_valid_java_id(function);
        StringBuffer sb = new StringBuffer();
        String self_type = sb.append(EFUN_TYPE.getInternalName()).append(module).append(safe_function)
                .append("Handler").append(arity).toString();

        ClassWriter cw = new ClassWriter(true);
        String super_class_name = EFUN_TYPE.getInternalName() + arity;
        cw.visit(Opcodes.V1_4, ACC_PUBLIC, self_type, null, super_class_name, null);

        // create handler field
        cw.visitField(ACC_PRIVATE, "handler", EFUNHANDLER_TYPE.getDescriptor(), null, null).visitEnd();
        cw.visitField(ACC_PRIVATE | ACC_FINAL, "module_name", EATOM_DESC, null, null).visitEnd();
        cw.visitField(ACC_PRIVATE | ACC_FINAL, "function_name", EATOM_DESC, null, null).visitEnd();

        // make constructor
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "(" + EFUNHANDLER_TYPE.getDescriptor() + ")V",
                null, null);
        mv.visitCode();

        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, super_class_name, "<init>", "()V");

        mv.visitVarInsn(ALOAD, 0);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitFieldInsn(PUTFIELD, self_type, "handler", EFUNHANDLER_TYPE.getDescriptor());
        mv.visitVarInsn(ALOAD, 0);
        mv.visitLdcInsn(module);
        mv.visitMethodInsn(INVOKESTATIC, EATOM_TYPE.getInternalName(), "intern",
                "(Ljava/lang/String;)Lerjang/EAtom;");
        mv.visitFieldInsn(PUTFIELD, self_type, "module_name", EATOM_DESC);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitLdcInsn(function);
        mv.visitMethodInsn(INVOKESTATIC, EATOM_TYPE.getInternalName(), "intern",
                "(Ljava/lang/String;)Lerjang/EAtom;");
        mv.visitFieldInsn(PUTFIELD, self_type, "function_name", EATOM_DESC);

        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();

        /** forward toString to handler */
        mv = cw.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0); // load self
        mv.visitFieldInsn(GETFIELD, self_type, "handler", EFUNHANDLER_TYPE.getDescriptor());
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
        mv.visitInsn(ARETURN);
        mv.visitMaxs(3, 3);
        mv.visitEnd();

        // make invoke_tail method
        //CompilerVisitor.make_invoketail_method(cw, self_type, arity, 0);
        make_invoke_method(cw, self_type, arity);
        make_go_method(cw, self_type, arity);
        make_encode_method(cw, self_type, arity);

        cw.visitEnd();
        byte[] data = cw.toByteArray();

        data = weave(data);

        Class<? extends EFun> clazz = ERT.defineClass(loader, self_type.replace('/', '.'), data);

        try {
            h = clazz.getConstructor(EFunHandler.class);
        } catch (Exception e) {
            throw new Error(e);
        }

        handlers.put(signature, h);
    }

    try {
        return h.newInstance(handler);
    } catch (Exception e) {
        throw new Error(e);
    }
}

From source file:erjang.EFun.java

License:Apache License

private static void make_cast_method(ClassWriter cw, int n) {
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "cast",
            "(" + EOBJECT_DESC + ")L" + EFUN_NAME + n + ";", null, null);
    mv.visitCode();//from w  w  w  .  ja  va 2 s.c o m

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitTypeInsn(INSTANCEOF, EFUN_NAME + n);

    Label fail = new Label();

    mv.visitJumpInsn(Opcodes.IFEQ, fail);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitTypeInsn(Opcodes.CHECKCAST, EFUN_NAME + n);
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitLabel(fail);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

From source file:erjang.EFun.java

License:Apache License

private static void make_go_method(ClassWriter cw, String self_type, int arity) {
    MethodVisitor mv;
    mv = cw.visitMethod(ACC_PUBLIC, "go", GO_DESC, null, PAUSABLE_EX);
    mv.visitCode();//from  w  w  w  .  j av a  2s .c om

    for (int i = 0; i < arity; i++) {
        mv.visitVarInsn(ALOAD, 1);
        mv.visitFieldInsn(GETFIELD, EPROC_NAME, "arg" + i, EOBJECT_DESC);
        mv.visitVarInsn(ASTORE, i + 2);
    }
    for (int i = 0; i < arity; i++) {
        mv.visitVarInsn(ALOAD, 1);
        mv.visitInsn(ACONST_NULL);
        mv.visitFieldInsn(PUTFIELD, EPROC_NAME, "arg" + i, EOBJECT_DESC);
    }

    // load handler
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, self_type, "handler", EFUNHANDLER_TYPE.getDescriptor());

    // load proc
    mv.visitVarInsn(ALOAD, 1);

    // create array
    mv.visitLdcInsn(new Integer(arity));
    mv.visitTypeInsn(ANEWARRAY, EOBJECT_TYPE.getInternalName());

    for (int i = 0; i < arity; i++) {
        mv.visitInsn(DUP);
        mv.visitLdcInsn(new Integer(i));
        mv.visitVarInsn(ALOAD, i + 2);
        mv.visitInsn(AASTORE);
    }

    mv.visitMethodInsn(INVOKEINTERFACE, EFUNHANDLER_TYPE.getInternalName(), "invoke",
            "(" + EPROC_TYPE.getDescriptor() + "[" + EOBJECT_DESC + ")" + EOBJECT_DESC);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(arity + 2, arity + 2);
    mv.visitEnd();

    cw.visitEnd();
}

From source file:erjang.EFun.java

License:Apache License

private static void make_invoke_method(ClassWriter cw, String self_type, int arity) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "invoke", EUtil.getSignature(arity, true), null, PAUSABLE_EX);
    mv.visitCode();//from  www  .  j ava 2  s  .  c  o m
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 1);
    for (int i = 0; i < arity; i++) {
        mv.visitVarInsn(ALOAD, i + 2);
    }
    mv.visitMethodInsn(INVOKEVIRTUAL, self_type, "invoke_tail", EUtil.getSignature(arity, true));
    mv.visitVarInsn(ASTORE, arity + 2);

    Label done = new Label();
    Label loop = new Label();
    mv.visitLabel(loop);
    mv.visitVarInsn(ALOAD, arity + 2);
    if (EProc.TAIL_MARKER == null) {
        mv.visitJumpInsn(IFNONNULL, done);
    } else {
        mv.visitFieldInsn(GETSTATIC, EPROC_TYPE.getInternalName(), "TAIL_MARKER", EOBJECT_TYPE.getDescriptor());
        mv.visitJumpInsn(IF_ACMPNE, done);
    }

    // load proc
    mv.visitVarInsn(ALOAD, 1);
    mv.visitFieldInsn(GETFIELD, EPROC_TYPE.getInternalName(), "tail", EFUN_TYPE.getDescriptor());
    mv.visitVarInsn(ALOAD, 1);

    mv.visitMethodInsn(INVOKEVIRTUAL, EFUN_TYPE.getInternalName(), "go", GO_DESC);
    mv.visitVarInsn(ASTORE, arity + 2);

    mv.visitJumpInsn(GOTO, loop);

    mv.visitLabel(done);
    mv.visitVarInsn(ALOAD, arity + 2);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(arity + 2, arity + 2);
    mv.visitEnd();
}

From source file:erjang.EFun.java

License:Apache License

static void make_encode_method(ClassWriter cw, String className, int arity) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "encode",
            "(" + Type.getDescriptor(EOutputStream.class) + ")V", null, null);
    mv.visitCode();/*from   w  ww  . ja  v  a2s .  c o  m*/

    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "module_name", EATOM_DESC);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "function_name", EATOM_DESC);
    mv.visitLdcInsn(new Integer(arity));

    mv.visitMethodInsn(INVOKEVIRTUAL, Type.getInternalName(EOutputStream.class), "write_external_fun",
            "(" + EATOM_DESC + EATOM_DESC + "I)V");

    mv.visitInsn(RETURN);
    mv.visitMaxs(4, 1);
    mv.visitEnd();
}

From source file:erjang.EFun.java

License:Apache License

static byte[] get_exported_fun_class_data(int arity) {
    /* Code template:/*from  w  w  w  .  j  a v  a  2s.  co  m*/
     * public abstract class EFun{arity}Exported extends EFun{arity} {
     *   protected final EAtom module_name, function_name;
     *   protected EFun{arity}Exported(String m, String f) {
     *     module_name   = EAtom.intern(m);
     *     function_name = EAtom.intern(f);
     *   }
     * }
     */

    ensure(arity); // Ensure presence of superclass.
    String super_type = EFUN_TYPE.getInternalName() + arity;
    String self_type = super_type + "Exported";

    ClassWriter cw = new ClassWriter(true);
    cw.visit(Opcodes.V1_5, Opcodes.ACC_PUBLIC | Opcodes.ACC_ABSTRACT, self_type, null, super_type, null);

    cw.visitField(ACC_PROTECTED | ACC_FINAL, "module_name", EATOM_TYPE.getDescriptor(), null, null).visitEnd();

    cw.visitField(ACC_PROTECTED | ACC_FINAL, "function_name", EATOM_TYPE.getDescriptor(), null, null)
            .visitEnd();

    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PROTECTED, "<init>",
            "(Ljava/lang/String;Ljava/lang/String;)V", null, null);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, super_type, "<init>", "()V");

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, EATOM_TYPE.getInternalName(), "intern",
            "(Ljava/lang/String;)Lerjang/EAtom;");
    mv.visitFieldInsn(Opcodes.PUTFIELD, self_type, "module_name", EATOM_DESC);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 2);
    mv.visitMethodInsn(Opcodes.INVOKESTATIC, EATOM_TYPE.getInternalName(), "intern",
            "(Ljava/lang/String;)Lerjang/EAtom;");
    mv.visitFieldInsn(Opcodes.PUTFIELD, self_type, "function_name", EATOM_DESC);

    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(3, 3);
    mv.visitEnd();

    make_encode_method_for_exported(cw, self_type, arity);

    cw.visitEnd();

    byte[] data = cw.toByteArray();
    return data;
}

From source file:erjang.EFun.java

License:Apache License

static void make_encode_method_for_exported(ClassWriter cw, String className, int arity) {
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "encode",
            "(" + Type.getDescriptor(EOutputStream.class) + ")V", null, null);
    mv.visitCode();//  w  w w  .  j av  a2 s.com

    mv.visitVarInsn(ALOAD, 1);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "module_name", EATOM_DESC);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(GETFIELD, className, "function_name", EATOM_DESC);
    mv.visitLdcInsn(new Integer(arity));

    mv.visitMethodInsn(INVOKEVIRTUAL, Type.getInternalName(EOutputStream.class), "write_external_fun",
            "(" + EATOM_DESC + EATOM_DESC + "I)V");

    mv.visitInsn(RETURN);
    mv.visitMaxs(4, 1);
    mv.visitEnd();
}

From source file:erjang.ETuple.java

License:Apache License

private static void create_tuple_copy(int i, ClassAdapter cw, String this_class_name, String super_class_name) {
    MethodVisitor mv;
    make_blank_bridge(cw, this_class_name, super_class_name);

    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "blank", "()L" + this_class_name + ";", null, null);
    mv.visitCode();/*  www.  j  a v a2 s. co m*/
    mv.visitTypeInsn(Opcodes.NEW, this_class_name);
    mv.visitInsn(Opcodes.DUP);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, this_class_name, "<init>", "()V");

    mv.visitInsn(Opcodes.ARETURN);

    mv.visitMaxs(3, 3);
    mv.visitEnd();
}

From source file:erjang.ETuple.java

License:Apache License

private static void make_blank_bridge(ClassAdapter cw, String this_class_name, String super_class_name) {
    MethodVisitor mv;
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC | Opcodes.ACC_BRIDGE, "blank",
            "()L" + super_class_name + ";", null, null);
    mv.visitCode();/*www . j av  a 2  s .c  o m*/
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, this_class_name, "blank", "()L" + this_class_name + ";");
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}