Example usage for org.objectweb.asm MethodVisitor visitEnd

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

  1. HOME
  2. Java
  3. org.objectweb.asm
  4. org.objectweb.asm.*
  5. MethodVisitor
  6. visitEnd

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.ETuple.java

License:Apache License

private static void create_tuple_nth(int n_cells, ClassAdapter cw, String this_class_name) {
    MethodVisitor mv;
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "elm", "(I)" + ETERM_TYPE.getDescriptor(), null, null);
    mv.visitCode();/*from w  ww . jav  a  2 s  .c  om*/

    Label dflt = new Label();
    Label[] labels = new Label[n_cells];
    for (int i = 0; i < n_cells; i++) {
        labels[i] = new Label();
    }

    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitTableSwitchInsn(1, n_cells, dflt, labels);

    for (int zbase = 0; zbase < n_cells; zbase++) {

        mv.visitLabel(labels[zbase]);

        mv.visitVarInsn(Opcodes.ALOAD, 0); // load this
        String field = "elem" + (zbase + 1);

        mv.visitFieldInsn(Opcodes.GETFIELD, this_class_name, field, ETERM_TYPE.getDescriptor());
        mv.visitInsn(Opcodes.ARETURN);
    }

    mv.visitLabel(dflt);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, ETUPLE_NAME, "bad_nth", "(I)" + ETERM_TYPE.getDescriptor());
    mv.visitInsn(Opcodes.ARETURN); // make compiler happy

    mv.visitMaxs(3, 2);
    mv.visitEnd();
}

From source file:erjang.ETuple.java

License:Apache License

private static void create_tuple_set(int n_cells, ClassAdapter cw, String this_class_name) {
    MethodVisitor mv;
    mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "set", "(I" + ETERM_TYPE.getDescriptor() + ")V", null, null);
    mv.visitCode();//  w  w  w .  j  av a  2  s  .c  o  m

    Label dflt = new Label();
    Label[] labels = new Label[n_cells];
    for (int i = 0; i < n_cells; i++) {
        labels[i] = new Label();
    }

    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitTableSwitchInsn(1, n_cells, dflt, labels);

    for (int zbase = 0; zbase < n_cells; zbase++) {

        mv.visitLabel(labels[zbase]);

        mv.visitVarInsn(Opcodes.ALOAD, 0); // load this
        mv.visitVarInsn(Opcodes.ALOAD, 2); // load term

        String field = "elem" + (zbase + 1);

        mv.visitFieldInsn(Opcodes.PUTFIELD, this_class_name, field, ETERM_TYPE.getDescriptor());
        mv.visitInsn(Opcodes.RETURN);
    }

    mv.visitLabel(dflt);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ILOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, ETUPLE_NAME, "bad_nth", "(I)" + ETERM_TYPE.getDescriptor());
    mv.visitInsn(Opcodes.POP);
    mv.visitInsn(Opcodes.RETURN); // make compiler happy

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

From source file:erjang.ETuple.java

License:Apache License

private static void create_count(ClassAdapter cw, int n) {
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "arity", "()I", null, null);
    mv.visitCode();// w w w .  ja  v a  2s . c  o  m

    if (n <= 5) {
        mv.visitInsn(Opcodes.ICONST_0 + n);
    } else {
        mv.visitLdcInsn(new Integer(n));
    }
    mv.visitInsn(Opcodes.IRETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:erjang.ETuple.java

License:Apache License

private static void create_cast(ClassAdapter cw, int n) {
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "cast",
            "(L" + ETUPLE_NAME + ";)L" + ETUPLE_NAME + n + ";", null, null);
    mv.visitCode();//  w ww  .  j a  v  a 2  s .  co  m

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, ETUPLE_NAME, "arity", "()I");

    if (n <= 5) {
        mv.visitInsn(Opcodes.ICONST_0 + n);
    } else {
        mv.visitLdcInsn(new Integer(n));
    }

    Label fail = new Label();

    mv.visitJumpInsn(Opcodes.IF_ICMPNE, fail);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitTypeInsn(Opcodes.CHECKCAST, ETUPLE_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.ETuple.java

License:Apache License

private static void create_cast2(ClassAdapter cw, int n) {
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "cast",
            "(L" + Type.getInternalName(EObject.class) + ";)L" + ETUPLE_NAME + n + ";", null, null);
    mv.visitCode();//w  w  w. j av  a2 s.  co m

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitInsn(Opcodes.DUP);
    mv.visitTypeInsn(Opcodes.INSTANCEOF, ETUPLE_NAME + n);

    Label fail = new Label();

    mv.visitJumpInsn(Opcodes.IFEQ, fail);
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitTypeInsn(Opcodes.CHECKCAST, ETUPLE_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.ETuple.java

License:Apache License

private static void create_constructor(ClassAdapter cw, String super_class_name) {
    MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitCode();/*from   w w  w  .j a v  a2s  . c  o  m*/
    mv.visitVarInsn(Opcodes.ALOAD, 0); // load this
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, super_class_name, "<init>", "()V");
    mv.visitInsn(Opcodes.RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:formatasm.FormatASM.java

License:Open Source License

public static byte[] generateBytes(String klazz, String subklazz, List<Spec> specs) {
    klazz = klazz.replace('.', '/');
    subklazz = subklazz.replace('.', '/');

    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    MethodVisitor mv;

    cw.visit(V1_7, ACC_PUBLIC + ACC_SUPER, subklazz, null, klazz, null);

    {// ww w  .j ava2s . c o m
        mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, klazz, "<init>", "()V");
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    {
        mv = cw.visitMethod(ACC_PUBLIC + ACC_VARARGS, "format", "([Ljava/lang/Object;)Ljava/lang/String;", null,
                null);

        /// StringBuilder sb = new StringBuilder();
        mv.visitCode();
        mv.visitTypeInsn(NEW, "java/lang/StringBuilder");
        mv.visitInsn(DUP);
        mv.visitMethodInsn(INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "()V");
        mv.visitVarInsn(ASTORE, 2);

        for (Spec spec : specs) {
            switch (spec.type) {
            case CONTENT:
                copyTemplateASM(klazz, mv, spec.begin, spec.end);
                // Skip further processing
                continue;

            case PERCENT:
                mv.visitVarInsn(ALOAD, 2);
                mv.visitIntInsn(BIPUSH, '%');
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
                        "(C)Ljava/lang/StringBuilder;");
                mv.visitInsn(POP);
                // Skip further processing
                continue;

            case INT:
                formatIntegerASM(mv, spec);
                break;

            case INT_HEX:
                formatHexidecimalASM(mv, spec);
                break;

            case OCTAL:
                formatOctalASM(mv, spec);
                break;

            case BOOL:
            case CHAR:
                // text = args[?].toString();
                mv.visitVarInsn(ALOAD, 1);
                mv.visitIntInsn(BIPUSH, spec.index);
                mv.visitInsn(AALOAD);
                mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Object", "toString", "()Ljava/lang/String;");
                mv.visitVarInsn(ASTORE, 3);
                break;

            case STRING:
                // text = (String) args[?]
                mv.visitVarInsn(ALOAD, 1);
                mv.visitIntInsn(BIPUSH, spec.index);
                mv.visitInsn(AALOAD);
                mv.visitTypeInsn(CHECKCAST, "java/lang/String");
                mv.visitVarInsn(ASTORE, 3);
                break;

            case DATETIME:
                formatDateTimeASM(mv, spec);
                break;

            default:
                break;
            }

            if (spec.upper && spec.type != Type.DATETIME) {
                toUpperCaseASM(mv);
            }

            if (spec.width > 0 && !spec.leftFlag) {
                addWidthASM(mv, spec);
            }

            appendTextASM(mv);

            if (spec.width > 0 && spec.leftFlag) {
                addWidthASM(mv, spec);
            }
        }

        /// return sb.toString();
        mv.visitVarInsn(ALOAD, 2);
        mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;");
        mv.visitInsn(ARETURN);

        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }
    cw.visitEnd();

    return cw.toByteArray();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeGenerationGoloIrVisitor.java

License:Apache License

private void writeModuleState(LocalReference moduleState) {
    String name = moduleState.getName();
    classWriter.visitField(ACC_PRIVATE | ACC_STATIC, name, "Ljava/lang/Object;", null, null).visitEnd();

    MethodVisitor mv = classWriter.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, name,
            "()Ljava/lang/Object;", null, null);
    mv.visitCode();/*from  ww  w.j a v  a 2  s.  c  o  m*/
    mv.visitFieldInsn(GETSTATIC, jvmKlass, name, "Ljava/lang/Object;");
    mv.visitInsn(ARETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();

    mv = classWriter.visitMethod(ACC_PRIVATE | ACC_STATIC | ACC_SYNTHETIC, name, "(Ljava/lang/Object;)V", null,
            null);
    mv.visitCode();
    mv.visitVarInsn(ALOAD, 0);
    mv.visitFieldInsn(PUTSTATIC, jvmKlass, name, "Ljava/lang/Object;");
    mv.visitInsn(RETURN);
    mv.visitMaxs(0, 0);
    mv.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeSetMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "set",
            "(Ljava/lang/String;Ljava/lang/Object;)Lgololang/GoloStruct;", null, null);
    visitor.visitCode();//from   ww w . ja  va2s  .c  o m
    insertPrivateElementCheck(struct, visitor);
    Label nextCase = new Label();
    for (String member : struct.getMembers()) {
        visitor.visitLdcInsn(member);
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitJumpInsn(IF_ACMPNE, nextCase);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitVarInsn(ALOAD, 2);
        visitor.visitMethodInsn(INVOKEVIRTUAL, owner, member, "(Ljava/lang/Object;)Lgololang/GoloStruct;");
        visitor.visitInsn(ARETURN);
        visitor.visitLabel(nextCase);
        nextCase = new Label();
    }
    insertUnknowElementCode(struct, visitor);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}

From source file:fr.insalyon.citi.golo.compiler.JavaBytecodeStructGenerator.java

License:Apache License

private void makeGetMethod(ClassWriter classWriter, Struct struct) {
    String owner = struct.getPackageAndClass().toJVMType();
    MethodVisitor visitor = classWriter.visitMethod(ACC_PUBLIC, "get", "(Ljava/lang/String;)Ljava/lang/Object;",
            null, null);//from w  w  w .  j  av a  2  s. c  o  m
    visitor.visitCode();
    insertPrivateElementCheck(struct, visitor);
    Label nextCase = new Label();
    for (String member : struct.getMembers()) {
        visitor.visitLdcInsn(member);
        visitor.visitVarInsn(ALOAD, 1);
        visitor.visitJumpInsn(IF_ACMPNE, nextCase);
        visitor.visitVarInsn(ALOAD, 0);
        visitor.visitMethodInsn(INVOKEVIRTUAL, owner, member, "()Ljava/lang/Object;");
        visitor.visitInsn(ARETURN);
        visitor.visitLabel(nextCase);
        nextCase = new Label();
    }
    insertUnknowElementCode(struct, visitor);
    visitor.visitMaxs(0, 0);
    visitor.visitEnd();
}