Example usage for org.objectweb.asm MethodVisitor visitLdcInsn

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

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Introduction

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

Prototype

public void visitLdcInsn(final Object value)

Source Link

Document

Visits a LDC instruction.

Usage

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates _asActions() method as following:
 * //  www  . ja  v a2s  . com
 * if(name.equals("upload"))
 *    return upload();
 * else if(name.equals("save"))
 *    return save();
 * else if(name.equals("main"))
 *    return main();
 * else if(name.equals("redir"))
 *    return redir();
 * else
 *    throw new RuntimeException("no action named "+name);
 */
private void createActionMethod() {
    StringBuilder sb = new StringBuilder();
    sb.append("(").append(Type.getType(String.class)).append(")").append(Type.getType(Result.class));
    String desc = sb.toString();

    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asAction", desc, null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getActions().keySet()) {
        Label l0 = null;
        Label l1 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first) {
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        }
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), name,
                "()" + Type.getType(Result.class), false);
        mv.visitInsn(Opcodes.ARETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitTypeInsn(Opcodes.NEW, "java/lang/NoSuchMethodException");
    mv.visitInsn(Opcodes.DUP);
    mv.visitTypeInsn(Opcodes.NEW, "java/lang/StringBuilder");
    mv.visitInsn(Opcodes.DUP);
    mv.visitLdcInsn("no @Action named ");
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/StringBuilder", "<init>", "(Ljava/lang/String;)V",
            false);
    mv.visitVarInsn(Opcodes.ALOAD, 1);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "append",
            "(Ljava/lang/String;)Ljava/lang/StringBuilder;", false);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/StringBuilder", "toString", "()Ljava/lang/String;",
            false);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, "java/lang/NoSuchMethodException", "<init>",
            "(Ljava/lang/String;)V", false);
    mv.visitInsn(Opcodes.ATHROW);

    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, next, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, next, 1);

    mv.visitMaxs(5, 2);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates the _asParameter() getter as
 * //ww  w.  j  a v a 2s  .  c  o  m
 * public Object _asParameter(String name) {
 *    if(name.equals("name"))
 *       return getName();
 *    if(name.equals("date"))
 *       return getDate();
 *    ...
 *    return null;
 * }
 */
private void createParametersGetterMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameter",
            "(Ljava/lang/String;)Ljava/lang/Object;", null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getParameters().keySet()) {
        Label l0 = null;
        Label l1 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first)
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        String methodGetterName = reflector.getGetters().get(name).getName();
        String methodGetterDesc = "()" + Type.getDescriptor(reflector.getParameters().get(name));

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), methodGetterName,
                methodGetterDesc, false);
        mv.visitInsn(Opcodes.ARETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.ACONST_NULL);
    mv.visitInsn(Opcodes.ARETURN);
    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, variable, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, variable, 1);
    mv.visitMaxs(2, 2);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Creates the code as://from  w w w.  j  ava 2s . co m
 * 
 * public void _asParameter(String name, Object value) {
 *    if(name.equals("name") {
 *       setName((String)value);
 *       return;
 *    }
 *   if(name.equals("date") {
 *      setDate((Date)value);
 *      return;
 *   }
 *   ...
 *    return;
 * } 
 */
private void createParametersSetterMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asParameter",
            "(Ljava/lang/String;Ljava/lang/Object;)V", null, null);

    Label start = new Label();
    Label next = new Label();
    Label variable = new Label();
    boolean first = true;

    for (String name : reflector.getParameters().keySet()) {
        Label l0 = null;
        Label l1 = new Label();
        Label l2 = new Label();

        if (first) {
            l0 = new Label();
            first = false;
        } else {
            l0 = next;
            next = new Label();
        }

        mv.visitLabel(l0);
        if (!first)
            mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitLdcInsn(name);
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/lang/String", "equals", "(Ljava/lang/Object;)Z", false);
        mv.visitJumpInsn(Opcodes.IFEQ, next);

        Class<?> parameterType = reflector.getParameters().get(name);

        String setterMethodName = reflector.getSetters().get(name).getName();
        String setterMethodDesc = "(" + Type.getDescriptor(parameterType) + ")V";

        mv.visitLabel(l1);
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 2);
        mv.visitTypeInsn(Opcodes.CHECKCAST, Type.getInternalName(parameterType));
        mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, reflector.getClazzInternalName(), setterMethodName,
                setterMethodDesc, false);

        mv.visitLabel(l2);
        mv.visitInsn(Opcodes.RETURN);
    }

    mv.visitLabel(next);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitInsn(Opcodes.RETURN);

    mv.visitLabel(variable);
    mv.visitLocalVariable("this", reflector.getClazzDescriptor(), null, start, next, 0);
    mv.visitLocalVariable("name", "Ljava/lang/String;", null, start, next, 1);
    mv.visitLocalVariable("value", "Ljava/lang/Object;", null, start, next, 2);
    mv.visitMaxs(2, 3);
    mv.visitEnd();
}

From source file:io.syncframework.optimizer.OControllerClassVisitor.java

License:Apache License

/**
 * Generates the _asUrl() method with using a constant string
 * public String _asUrl() { return "/*"; }
 */// w  w  w . j a  va2s.  c  o  m
public void createUrlMethod() {
    MethodVisitor mv = cv.visitMethod(Opcodes.ACC_PUBLIC, "_asUrl", "()Ljava/lang/String;", null, null);
    mv.visitCode();
    Label l0 = new Label();
    mv.visitLabel(l0);
    mv.visitLdcInsn(reflector.getUrl());
    mv.visitInsn(Opcodes.ARETURN);
    Label l1 = new Label();
    mv.visitLocalVariable("this", Type.getDescriptor(reflector.getClazz()), null, l0, l1, 0);
    mv.visitMaxs(1, 1);
    mv.visitEnd();
}

From source file:jaspex.speculation.runtime.CodegenHelper.java

License:Open Source License

public static byte[] generateClass(Type codegenType) {
    // Obter id a partir do tipo
    String name = codegenType.commonName();
    name = name.replaceFirst(Matcher.quoteReplacement(CODEGEN_CLASS_PREFIX), "");
    int id = Integer.parseInt(name.substring(0, name.indexOf("$")));

    // Obter InvokedMethod
    InvokedMethod method = _idToMethodMap.get(id);

    Log.trace(color("[ CodeGen ]", "31") + " Generating wrapper for {}.{}{}", method.owner(), method.name(),
            method.desc());/*from w  w  w  .  j  a  v  a 2  s  . c  om*/

    UtilList<Type> arguments = method.argumentTypes();
    if (!method.isStatic())
        arguments.addFirst(method.owner());
    String argumentsDesc = "";
    for (Type type : arguments)
        argumentsDesc += type.bytecodeName();

    // Optimizao: Se mtodo for ()V e static, criamos um singleton apenas com o call,
    //      e tornamos o constructor private para que a classe no seja instanciada
    //      noutros locais
    boolean singletonMode = arguments.isEmpty();

    // Criar classe
    ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
    cw.visit(V1_6, ACC_PUBLIC | ACC_FINAL, codegenType.asmName(), null, CommonTypes.CALLABLE.asmName(),
            (Options.RVP ? new String[] { CommonTypes.PREDICTABLECALLABLE.asmName() } : null));
    cw.visitSource(color("JaSPEx Generated Wrapper Class", "31"), null);

    // Criar fields para conter argumentos
    {
        int fieldPos = 0;
        for (Type t : arguments) {
            cw.visitField(ACC_PRIVATE + ACC_FINAL, "arg" + (fieldPos++), t.bytecodeName(), null, null);
        }
    }

    // Criar constructor
    {
        MethodVisitor mv = cw.visitMethod((singletonMode ? ACC_PRIVATE : ACC_PUBLIC), "<init>",
                "(" + argumentsDesc + ")V", null, null);
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, Type.OBJECT.asmName(), "<init>", "()V");
        int localsPos = 0;
        int fieldPos = 0;
        for (Type t : arguments) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitVarInsn(t.getLoadInsn(), localsPos + 1);
            mv.visitFieldInsn(PUTFIELD, codegenType.asmName(), "arg" + fieldPos++, t.bytecodeName());
            localsPos += t.getNumberSlots();
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    // Criar mtodo esttico como "bridge" para o constructor
    // A ideia deste mtodo  resolver o problema de j termos os argumentos para a invocao na stack
    // quando descobrimos que queremos criar uma instncia desta classe. Assim, em vez de andar a
    // fazer swaps at colocarmos a instncia desta classe por baixo dos argumentos para o seu
    // construtor, chamamos este mtodo esttico para fazer esse trabalho por ns.
    // O que este mtodo  basicamente:
    // public static codegenType newInstance(args) { return new codegenType(args); }
    if (!singletonMode) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "newInstance",
                "(" + argumentsDesc + ")" + codegenType.bytecodeName(), null, null);
        mv.visitCode();
        mv.visitTypeInsn(NEW, codegenType.asmName());
        mv.visitInsn(DUP);
        int localsPos = 0;
        for (Type t : arguments) {
            mv.visitVarInsn(t.getLoadInsn(), localsPos);
            localsPos += t.getNumberSlots();
        }
        mv.visitMethodInsn(INVOKESPECIAL, codegenType.asmName(), "<init>", "(" + argumentsDesc + ")V");
        mv.visitInsn(ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    // Criar mtodos call e call_nonspeculative
    for (String[] target : new String[][] { { "call", method.name() },
            { "call_nonspeculative", method.name().replace("$speculative", "$non_speculative") } }) {
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, target[0], "()" + Type.OBJECT.bytecodeName(), null, null);
        mv.visitCode();
        int fieldPos = 0;
        for (Type t : arguments) {
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, codegenType.asmName(), "arg" + fieldPos++, t.bytecodeName());
        }
        mv.visitMethodInsn(method.opcode() == INVOKESPECIAL ? INVOKEVIRTUAL : method.opcode(),
                method.owner().asmName(), target[1], method.desc());
        if (method.returnType().equals(Type.PRIM_VOID)) {
            if (!jaspex.Options.FASTMODE)
                mv.visitLdcInsn("JASPEX VOID RETURN VALUE");
            else
                mv.visitInsn(ACONST_NULL);
        } else if (method.returnType().isPrimitive())
            boxWrap(method.returnType(), mv);
        mv.visitInsn(ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    if (singletonMode) {
        // Criar field com singleton
        cw.visitField(ACC_STATIC | ACC_FINAL | ACC_PUBLIC, "INSTANCE", codegenType.bytecodeName(), null, null);
    }

    if (Options.RVP) {
        // Field com previso
        cw.visitField(ACC_PRIVATE | ACC_STATIC | ACC_FINAL, "PREDICTOR", CommonTypes.PREDICTOR.bytecodeName(),
                null, null);

        { // Mtodo de acesso  previso
            MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "predict", "()" + Type.OBJECT.bytecodeName(), null,
                    null);
            mv.visitCode();
            if (method.returnType().equals(Type.PRIM_VOID)) {
                mv.visitTypeInsn(NEW, "java/lang/AssertionError");
                mv.visitInsn(DUP);
                mv.visitLdcInsn("Asked for prediction for Void method");
                mv.visitMethodInsn(INVOKESPECIAL, "java/lang/AssertionError", "<init>",
                        "(Ljava/lang/Object;)V");
                mv.visitInsn(ATHROW);
            } else {
                mv.visitFieldInsn(GETSTATIC, codegenType.asmName(), "PREDICTOR",
                        CommonTypes.PREDICTOR.bytecodeName());
                mv.visitMethodInsn(INVOKEVIRTUAL, CommonTypes.PREDICTOR.asmName(), "predict",
                        "()" + Type.OBJECT.bytecodeName());
                mv.visitInsn(ARETURN);
            }
            mv.visitMaxs(0, 0);
            mv.visitEnd();
        }
        { // Mtodo de actualizao da previso
            MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "updatePrediction",
                    "(" + Type.OBJECT.bytecodeName() + ")V", null, null);
            mv.visitCode();
            if (!method.returnType().equals(Type.PRIM_VOID)) {
                mv.visitFieldInsn(GETSTATIC, codegenType.asmName(), "PREDICTOR",
                        CommonTypes.PREDICTOR.bytecodeName());
                mv.visitVarInsn(ALOAD, 1);
                mv.visitMethodInsn(INVOKEVIRTUAL, CommonTypes.PREDICTOR.asmName(), "updatePrediction",
                        "(" + Type.OBJECT.bytecodeName() + ")V");
            }
            mv.visitInsn(RETURN);
            mv.visitMaxs(0, 0);
            mv.visitEnd();
        }

    }

    // Gerar clinit caso existam fields para inicializar
    if (singletonMode || Options.RVP) {
        // Adicionar static initializer
        MethodVisitor mv = cw.visitMethod(ACC_STATIC, "<clinit>", "()V", null, null);
        mv.visitCode();
        if (singletonMode) {
            mv.visitTypeInsn(NEW, codegenType.asmName());
            mv.visitInsn(DUP);
            mv.visitMethodInsn(INVOKESPECIAL, codegenType.asmName(), "<init>", "()V");
            mv.visitFieldInsn(PUTSTATIC, codegenType.asmName(), "INSTANCE", codegenType.bytecodeName());
        }
        if (Options.RVP) {
            mv.visitLdcInsn(method.returnType().bytecodeName());
            mv.visitMethodInsn(INVOKESTATIC, CommonTypes.PREDICTORFACTORY.asmName(), "newPredictor",
                    "(" + Type.STRING.bytecodeName() + ")" + CommonTypes.PREDICTOR.bytecodeName());
            mv.visitFieldInsn(PUTSTATIC, codegenType.asmName(), "PREDICTOR",
                    CommonTypes.PREDICTOR.bytecodeName());
        }
        mv.visitInsn(RETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    // Criar toString
    {
        Type sb = Type.fromClass(StringBuilder.class);
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "toString", "()" + Type.STRING.bytecodeName(), null,
                null);
        mv.visitCode();
        mv.visitTypeInsn(NEW, sb.asmName());
        mv.visitInsn(DUP);
        mv.visitVarInsn(ALOAD, 0);
        mv.visitMethodInsn(INVOKESPECIAL, Type.OBJECT.asmName(), "toString", "()" + Type.STRING.bytecodeName());
        mv.visitMethodInsn(INVOKESPECIAL, sb.asmName(), "<init>", "(" + Type.STRING.bytecodeName() + ")V");
        mv.visitVarInsn(ASTORE, 1);
        mv.visitVarInsn(ALOAD, 1);
        mv.visitLdcInsn("{");
        mv.visitMethodInsn(INVOKEVIRTUAL, sb.asmName(), "append",
                "(" + Type.STRING.bytecodeName() + ")" + sb.bytecodeName());
        int fieldPos = 0;
        boolean first = true;
        for (Type t : arguments) {
            mv.visitVarInsn(ALOAD, 1);
            mv.visitLdcInsn((first ? "" : ", ") + "arg" + fieldPos + ": ");
            first = false;
            mv.visitMethodInsn(INVOKEVIRTUAL, sb.asmName(), "append",
                    "(" + Type.STRING.bytecodeName() + ")" + sb.bytecodeName());
            mv.visitVarInsn(ALOAD, 1);
            mv.visitVarInsn(ALOAD, 0);
            mv.visitFieldInsn(GETFIELD, codegenType.asmName(), "arg" + fieldPos++, t.bytecodeName());
            if (t.isPrimitive())
                boxWrap(t, mv);
            mv.visitMethodInsn(INVOKESTATIC, Type.STRING.asmName(), "valueOf",
                    "(" + Type.OBJECT.bytecodeName() + ")" + Type.STRING.bytecodeName());
            mv.visitMethodInsn(INVOKEVIRTUAL, sb.asmName(), "append",
                    "(" + Type.STRING.bytecodeName() + ")" + sb.bytecodeName());
        }
        mv.visitVarInsn(ALOAD, 1);
        mv.visitLdcInsn("} ");
        mv.visitMethodInsn(INVOKEVIRTUAL, sb.asmName(), "append",
                "(" + Type.STRING.bytecodeName() + ")" + sb.bytecodeName());
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKEVIRTUAL, Type.OBJECT.asmName(), "toString", "()" + Type.STRING.bytecodeName());
        mv.visitInsn(ARETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    if (Options.ALLOWDUMMYTX && SpeculationSkiplist.useDummyTransaction(method)) {
        Log.info("Setting isDummy transaction flag for " + method.owner().commonName() + "." + method.name());

        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "useDummyTransaction", "()Z", null, null);
        mv.visitCode();
        mv.visitInsn(ICONST_1);
        mv.visitInsn(IRETURN);
        mv.visitMaxs(0, 0);
        mv.visitEnd();
    }

    cw.visitEnd();

    byte[] newClass = cw.toByteArray();

    //if (speculation.SpeculativeClassLoader.PRINTCLASS) asmlib.Util.printClass(newClass);

    if (Options.WRITECLASS) {
        try {
            new java.io.File("output" + java.io.File.separatorChar).mkdir();
            java.io.FileOutputStream fos = new java.io.FileOutputStream(
                    "output" + java.io.File.separatorChar + codegenType.commonName() + ".class");
            fos.write(newClass);
            fos.close();
        } catch (java.io.FileNotFoundException e) {
            throw new Error(e);
        } catch (java.io.IOException e) {
            throw new Error(e);
        }
    }

    return newClass;
}

From source file:javalin.expr.Exp.java

License:Open Source License

byte[] compile(final String name) {
    // class header
    final String[] itfs = { DoubleExpression.class.getName().replaceAll("\\.", "/") };
    final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);

    cw.visit(V1_5, ACC_PUBLIC + ACC_SUPER, name, null, "java/lang/Object", itfs);

    // default public constructor
    MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
    mv.visitVarInsn(ALOAD, 0);/* ww w .  jav a  2 s . c om*/
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
    mv.visitInsn(RETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    // eval method
    mv = cw.visitMethod(ACC_PUBLIC, "eval", "(Ljava/util/Map;)D",
            "(Ljava/util/Map<Ljava/lang/String;Ljava/lang/Double;>;)D", null);
    compile(mv);
    mv.visitInsn(DRETURN);
    // max stack and max locals automatically computed
    mv.visitMaxs(0, 0);
    mv.visitEnd();

    mv = cw.visitMethod(ACC_PUBLIC, "toString", "()Ljava/lang/String;", null, null);
    mv.visitLdcInsn(toString());
    mv.visitInsn(ARETURN);
    mv.visitMaxs(1, 1);
    mv.visitEnd();

    return cw.toByteArray();
}

From source file:javaone2015.con7442.indyprotector.BootstrapMethodGenerator.java

License:Apache License

/**
 * Generate bootstrap method//from  www  . ja  v  a 2  s . c om
 */
public void insertMethod(ClassVisitor target) {
    MethodVisitor mv = target.visitMethod(ACC_PRIVATE + ACC_STATIC, BSM_NAME, BSM_SIG, null, null);
    mv.visitCode();
    Label l0 = new Label();
    Label l1 = new Label();
    Label l2 = new Label();
    mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
    mv.visitInsn(ACONST_NULL);
    mv.visitVarInsn(ASTORE, 7);
    mv.visitLabel(l0);
    mv.visitVarInsn(ALOAD, 4);
    mv.visitMethodInsn(INVOKESTATIC, "java/lang/Class", "forName", "(Ljava/lang/String;)Ljava/lang/Class;",
            false);
    mv.visitVarInsn(ASTORE, 8);
    mv.visitLdcInsn(Type.getType(targetClassName));
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Class", "getClassLoader", "()Ljava/lang/ClassLoader;", false);
    mv.visitVarInsn(ASTORE, 9);
    mv.visitVarInsn(ALOAD, 6);
    mv.visitVarInsn(ALOAD, 9);
    mv.visitMethodInsn(INVOKESTATIC, "java/lang/invoke/MethodType", "fromMethodDescriptorString",
            "(Ljava/lang/String;Ljava/lang/ClassLoader;)Ljava/lang/invoke/MethodType;", false);
    mv.visitVarInsn(ASTORE, 10);
    mv.visitVarInsn(ILOAD, 3);
    Label l3 = new Label();
    Label l4 = new Label();
    Label l5 = new Label();
    mv.visitTableSwitchInsn(182, 185, l4, new Label[] { l3, l4, l5, l3 });
    mv.visitLabel(l5);
    mv.visitFrame(Opcodes.F_FULL, 11,
            new Object[] { "java/lang/invoke/MethodHandles$Lookup", "java/lang/String",
                    "java/lang/invoke/MethodType", Opcodes.INTEGER, "java/lang/String", "java/lang/String",
                    "java/lang/String", "java/lang/invoke/MethodHandle", "java/lang/Class",
                    "java/lang/ClassLoader", "java/lang/invoke/MethodType" },
            0, new Object[] {});
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 8);
    mv.visitVarInsn(ALOAD, 5);
    mv.visitVarInsn(ALOAD, 10);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandles$Lookup", "findStatic",
            "(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;",
            false);
    mv.visitVarInsn(ASTORE, 7);
    Label l6 = new Label();
    mv.visitJumpInsn(GOTO, l6);
    mv.visitLabel(l3);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, 0);
    mv.visitVarInsn(ALOAD, 8);
    mv.visitVarInsn(ALOAD, 5);
    mv.visitVarInsn(ALOAD, 10);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandles$Lookup", "findVirtual",
            "(Ljava/lang/Class;Ljava/lang/String;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;",
            false);
    mv.visitVarInsn(ASTORE, 7);
    mv.visitJumpInsn(GOTO, l6);
    mv.visitLabel(l4);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitTypeInsn(NEW, "java/lang/BootstrapMethodError");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/BootstrapMethodError", "<init>", "()V", false);
    mv.visitInsn(ATHROW);
    mv.visitLabel(l6);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitVarInsn(ALOAD, 7);
    mv.visitVarInsn(ALOAD, 2);
    mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/invoke/MethodHandle", "asType",
            "(Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;", false);
    mv.visitVarInsn(ASTORE, 7);
    mv.visitLabel(l1);
    Label l7 = new Label();
    mv.visitJumpInsn(GOTO, l7);
    mv.visitLabel(l2);
    mv.visitFrame(Opcodes.F_FULL, 8,
            new Object[] { "java/lang/invoke/MethodHandles$Lookup", "java/lang/String",
                    "java/lang/invoke/MethodType", Opcodes.INTEGER, "java/lang/String", "java/lang/String",
                    "java/lang/String", "java/lang/invoke/MethodHandle" },
            1, new Object[] { "java/lang/Exception" });
    mv.visitVarInsn(ASTORE, 8);
    mv.visitTypeInsn(NEW, "java/lang/BootstrapMethodError");
    mv.visitInsn(DUP);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/BootstrapMethodError", "<init>", "()V", false);
    mv.visitInsn(ATHROW);
    mv.visitLabel(l7);
    mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null);
    mv.visitTypeInsn(NEW, "java/lang/invoke/ConstantCallSite");
    mv.visitInsn(DUP);
    mv.visitVarInsn(ALOAD, 7);
    mv.visitMethodInsn(INVOKESPECIAL, "java/lang/invoke/ConstantCallSite", "<init>",
            "(Ljava/lang/invoke/MethodHandle;)V", false);
    mv.visitInsn(ARETURN);
    mv.visitMaxs(4, 11);
    mv.visitEnd();

}

From source file:jerl.bcm.inj.impl.InjectCollection.java

License:Apache License

public void injectIDRegistration(MethodVisitor mv, int id) {
    // TODO: change to correct call
    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    mv.visitLdcInsn("entry: " + id);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
}

From source file:jerl.bcm.inj.impl.InjectCollection.java

License:Apache License

public void injectSystemOut(MethodVisitor mv, String str) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    mv.visitLdcInsn(str);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V");
}

From source file:jerl.bcm.inj.impl.InjectCollection.java

License:Apache License

public void injectMemberFieldSystemOut(MethodVisitor mv, String clazz, String field, String type,
        String printType, String prefix, boolean isStatic) {
    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    mv.visitLdcInsn(prefix);
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "print", "(Ljava/lang/String;)V");

    mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;");
    if (isStatic) {
        mv.visitFieldInsn(Opcodes.GETSTATIC, clazz, field, type);
    } else {//from  www  .j  a va  2  s  .c o  m
        mv.visitVarInsn(Opcodes.ALOAD, 0); // this
        mv.visitFieldInsn(Opcodes.GETFIELD, clazz, field, type);
    }
    mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream", "println", "(" + printType + ")V");
}