Example usage for org.objectweb.asm MethodVisitor visitLabel

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

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Introduction

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

Prototype

public void visitLabel(final Label label)

Source Link

Document

Visits a label.

Usage

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void include(Include include, int event, MethodVisitor visitor) {
    visitor.visitVarInsn(ALOAD, event);/*from  www  .  j ava  2 s .  c  o m*/
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
            "getClass", BytecodeEventListenerGeneration.getClassMethod.getDescriptor(), false);
    Label returnLabel = new Label();
    Label continueLabel = new Label();
    for (Class clazz : include.value()) {
        visitor.visitInsn(DUP);
        visitor.visitLdcInsn(Type.getType(clazz));
        visitor.visitInsn(SWAP);
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.objectType.getInternalName(),
                "equals", BytecodeEventListenerGeneration.equalsMethod.getDescriptor(), false);
        visitor.visitJumpInsn(IFEQ, returnLabel);
    }
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void cancelled(Cancelled cancelled, int event, Class eventClass, MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();
    visitor.visitVarInsn(ALOAD, event);/*from  ww w  .  j  av a  2s  .  co m*/
    if (CancellableEvent.class.isAssignableFrom(eventClass)) { //Assume cancelled
        visitor.visitMethodInsn(INVOKEINTERFACE,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName(), "isCancelled",
                BytecodeEventListenerGeneration.isCancelledEventMethod.getDescriptor(), true);
        if (cancelled.value()) {
            visitor.visitJumpInsn(IFEQ, returnLabel);
        } else {
            visitor.visitJumpInsn(IFNE, returnLabel);
        }
    } else { //Check instance
        Label cleanLabel = new Label();
        Label continueLabel2 = new Label();
        visitor.visitInsn(DUP);
        visitor.visitTypeInsn(INSTANCEOF,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName());
        visitor.visitJumpInsn(IFEQ, cleanLabel);

        visitor.visitJumpInsn(GOTO, continueLabel2);

        visitor.visitLabel(cleanLabel);
        visitor.visitInsn(POP);
        visitor.visitJumpInsn(GOTO, continueLabel);

        visitor.visitLabel(continueLabel2);

        visitor.visitTypeInsn(CHECKCAST,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName());
        visitor.visitMethodInsn(INVOKEINTERFACE,
                BytecodeEventListenerGeneration.cancellableEventType.getInternalName(), "isCancelled",
                BytecodeEventListenerGeneration.isCancelledEventMethod.getDescriptor(), true);
        if (cancelled.value()) {
            visitor.visitJumpInsn(IFEQ, returnLabel);
        } else {
            visitor.visitJumpInsn(IFNE, returnLabel);
        }
    }
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void firstCause(FirstCause firstCause, Class type, int param, int event, MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);// ww  w .  j a v a 2s  . c  om
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "cause", BytecodeEventListenerGeneration.eventCauseMethod.getDescriptor(), true);
    visitor.visitLdcInsn(Type.getType(type));
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.causeType.getInternalName(), "first",
            BytecodeEventListenerGeneration.causeFirstMethod.getDescriptor(), false);
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void lastCause(LastCause lastCause, Class type, int param, int event, MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);/*w ww .  j av  a  2  s  .  c  o m*/
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "cause", BytecodeEventListenerGeneration.eventCauseMethod.getDescriptor(), true);
    visitor.visitLdcInsn(Type.getType(type));
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.causeType.getInternalName(), "last",
            BytecodeEventListenerGeneration.causeLastMethod.getDescriptor(), false);
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void getContext(GetContext getContext, String paramName, Class type, int param, int event,
        MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);// w  ww .  j  ava  2  s. c o  m
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "context", BytecodeEventListenerGeneration.eventContextMethod.getDescriptor(), true);
    visitor.visitLdcInsn(getContext.value().equals(GetContext.REFER_TO_PARAM) ? param : getContext.value());
    visitor.visitLdcInsn(Type.getType(type));
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.contextType.getInternalName(), "get",
            BytecodeEventListenerGeneration.contextGetMethod.getDescriptor(), false);
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void firstContext(FirstContext firstContext, boolean asPair, Class type, int param, int event,
        MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);//w w w . ja  v  a2  s  .c  o  m
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "context", BytecodeEventListenerGeneration.eventContextMethod.getDescriptor(), true);
    visitor.visitLdcInsn(Type.getType(type));
    if (asPair) {
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.contextType.getInternalName(),
                "first", BytecodeEventListenerGeneration.contextFirstMethod.getDescriptor(), false);
    } else {
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.contextType.getInternalName(),
                "firstSimple", BytecodeEventListenerGeneration.contextSimpleFirstMethod.getDescriptor(), false);
    }
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(asPair ? Type.getType(Pair.class) : Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void lastContext(LastContext lastContext, boolean asPair, Class type, int param, int event,
        MethodVisitor visitor) {
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);//ww w. j  a  v a 2 s. com
    visitor.visitMethodInsn(INVOKEINTERFACE, BytecodeEventListenerGeneration.eventType.getInternalName(),
            "context", BytecodeEventListenerGeneration.eventContextMethod.getDescriptor(), true);
    visitor.visitLdcInsn(Type.getType(type));
    if (asPair) {
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.contextType.getInternalName(),
                "last", BytecodeEventListenerGeneration.contextLastMethod.getDescriptor(), false);
    } else {
        visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.contextType.getInternalName(),
                "lastSimple", BytecodeEventListenerGeneration.contextSimpleLastMethod.getDescriptor(), false);
    }
    visitor.visitInsn(DUP);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "isPresent", BytecodeEventListenerGeneration.isPresentMethod.getDescriptor(), false);
    visitor.visitJumpInsn(IFEQ, returnLabel);
    visitor.visitMethodInsn(INVOKEVIRTUAL, BytecodeEventListenerGeneration.optionalType.getInternalName(),
            "get", BytecodeEventListenerGeneration.getMethod.getDescriptor(), false);
    BytecodeEventListenerGeneration.checkCast(asPair ? Type.getType(Pair.class) : Type.getType(type), visitor);
    visitor.visitVarInsn(ASTORE, param);
    visitor.visitJumpInsn(GOTO, continueLabel);
    visitor.visitLabel(returnLabel);
    visitor.visitInsn(RETURN);
    visitor.visitLabel(continueLabel);
}

From source file:com.gmail.socraticphoenix.nebula.event.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void get(Get get, Parameter parameter, Class eventClass, int param, int event,
        MethodVisitor visitor) {
    try {/*from w w  w .ja v a2s .  c o  m*/
        String name = EventListenerWrapper.name(get, parameter, eventClass).get();
        Type eventType = Type.getType(eventClass);
        Method rMethod = eventClass.getMethod(name);
        Type method = Type.getType(rMethod);
        Type type = Type.getType(parameter.getType());
        visitor.visitVarInsn(ALOAD, event);
        if (eventClass.isInterface()) {
            visitor.visitMethodInsn(INVOKEINTERFACE, eventType.getInternalName(), name, method.getDescriptor(),
                    true);
        } else {
            visitor.visitMethodInsn(INVOKEVIRTUAL, eventType.getInternalName(), name, method.getDescriptor(),
                    false);
        }
        if (get.nonnull() && method.getReturnType().getDescriptor().startsWith("L")) {
            Label continueLabel = new Label();
            visitor.visitInsn(DUP);
            visitor.visitJumpInsn(IFNONNULL, continueLabel);
            visitor.visitInsn(RETURN);
            visitor.visitLabel(continueLabel);
            visitor.visitVarInsn(ASTORE, param);
        } else {
            if (!method.getReturnType().getDescriptor().startsWith("L")) {
                Type boxing = Type.getType(Reflections.boxingType(rMethod.getReturnType()));
                visitor.visitTypeInsn(NEW, boxing.getInternalName());
                visitor.visitInsn(DUP_X1);
                visitor.visitInsn(SWAP);
                visitor.visitMethodInsn(INVOKESPECIAL, boxing.getInternalName(), "<init>",
                        Type.getMethodDescriptor(Type.VOID_TYPE, method.getReturnType()), false);
            }
            visitor.visitVarInsn(ASTORE, param);
        }
    } catch (NoSuchMethodException e) {
        //Meh
    }
}

From source file:com.gmail.socraticphoenix.occurence.wrappers.BytecodeEventListenerGeneration.java

License:Open Source License

public static void get(Get get, Parameter parameter, Class eventClass, int param, int event,
        MethodVisitor visitor) {
    try {//from  www . ja v  a 2  s . com
        String name = EventListenerWrapper.name(get, parameter, eventClass).get();
        Type eventType = Type.getType(eventClass);
        Method rMethod = eventClass.getMethod(name);
        Type method = Type.getType(rMethod);
        visitor.visitVarInsn(ALOAD, event);
        if (eventClass.isInterface()) {
            visitor.visitMethodInsn(INVOKEINTERFACE, eventType.getInternalName(), name, method.getDescriptor(),
                    true);
        } else {
            visitor.visitMethodInsn(INVOKEVIRTUAL, eventType.getInternalName(), name, method.getDescriptor(),
                    false);
        }
        if (get.nonnull() && method.getReturnType().getDescriptor().startsWith("L")) {
            Label continueLabel = new Label();
            visitor.visitInsn(DUP);
            visitor.visitJumpInsn(IFNONNULL, continueLabel);
            visitor.visitInsn(RETURN);
            visitor.visitLabel(continueLabel);
            visitor.visitVarInsn(ASTORE, param);
        } else {
            if (!method.getReturnType().getDescriptor().startsWith("L")) {
                Type boxing = Type.getType(Reflections.boxingType(rMethod.getReturnType()));
                visitor.visitTypeInsn(NEW, boxing.getInternalName());
                visitor.visitInsn(DUP_X1);
                visitor.visitInsn(SWAP);
                visitor.visitMethodInsn(INVOKESPECIAL, boxing.getInternalName(), "<init>",
                        Type.getMethodDescriptor(Type.VOID_TYPE, method.getReturnType()), false);
            }
            visitor.visitVarInsn(ASTORE, param);
        }
    } catch (NoSuchMethodException e) {
        //Meh
    }
}

From source file:com.google.code.jconts.instrument.gen.ComputationClassGenerator.java

License:Apache License

private void generateConstructor(ClassVisitor cv) {
    final String name = info.computationClassName;
    final Type outerType = Type.getObjectType(info.owner);

    // Constructor have form either <init>(OuterClass this$0, State state)
    // or <init>(State state)
    String ctorDesc;/*ww w .j  a  v a  2s.c  om*/
    if (info.isStatic()) {
        ctorDesc = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { info.stateType });
    } else {
        cv.visitField(Opcodes.ACC_PRIVATE | Opcodes.ACC_FINAL, "this$0", 'L' + info.owner + ';', null, null);

        ctorDesc = Type.getMethodDescriptor(Type.VOID_TYPE, new Type[] { outerType, info.stateType });
    }

    // Generate constructor
    MethodVisitor mv = cv.visitMethod(0, CTOR_NAME, ctorDesc, null, null);
    mv.visitCode();
    Label start = new Label();
    Label end = new Label();
    mv.visitLabel(start);

    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitMethodInsn(Opcodes.INVOKESPECIAL, OBJECT_NAME, CTOR_NAME, DEFAULT_CTOR_DESC);

    // Save state field
    mv.visitVarInsn(Opcodes.ALOAD, 0);
    mv.visitVarInsn(Opcodes.ALOAD, 1 + info.thisOffset);
    mv.visitFieldInsn(Opcodes.PUTFIELD, name, "state", stateDesc);

    // Save outer this
    if (!info.isStatic()) {
        mv.visitVarInsn(Opcodes.ALOAD, 0);
        mv.visitVarInsn(Opcodes.ALOAD, 1);
        mv.visitFieldInsn(Opcodes.PUTFIELD, name, "this$0", outerType.getDescriptor());
    }
    mv.visitInsn(Opcodes.RETURN);
    mv.visitLabel(end);

    mv.visitLocalVariable("this", 'L' + name + ';', signature, start, end, 0);
    if (!info.isStatic()) {
        mv.visitLocalVariable("this$0", outerType.getDescriptor(), null, start, end, 1);
    }
    mv.visitLocalVariable("state", stateDesc, null, start, end, 1 + info.thisOffset);

    mv.visitMaxs(2, 2 + info.thisOffset);
    mv.visitEnd();
}