Example usage for org.objectweb.asm Label Label

List of usage examples for org.objectweb.asm Label Label

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

Introduction

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

Prototype

public Label()

Source Link

Document

Constructs a new 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 a  v a2  s .com*/
    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  w ww  . j av a2s . c  o  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);/*from   w w w .j a  va  2 s. 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);/*from w  ww.  j av a 2s.  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) {/*  www . j ava  2 s . c  o  m*/
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);
    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) {//from  w w  w  .j  a v  a2 s  .com
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);
    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) {/*from w  ww . j a v a2s . c o  m*/
    Label returnLabel = new Label();
    Label continueLabel = new Label();

    visitor.visitVarInsn(ALOAD, event);
    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) {//from   w w  w .  jav  a  2  s.  c  o  m
    try {
        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) {//  w w  w. j a v  a2s.co m
    try {
        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.AsyncMethodAdapter.java

License:Apache License

private void checkProlog() {
    // Generate only once (at the beginning)
    if (prologGenerated) {
        return;//from w w  w  . jav  a 2s .c  om
    }
    prologGenerated = true;

    // try...catch around the whole body. Should be added last (after all
    // other try..catch blocks).
    // Actually, we are making an assumption that reader will emit
    // visitTryCatchBlock BEFORE generating any bytecode.
    // We cannot call visitTryCatchBlock at the end since it should
    // be called before all its labels are visited (which we generate
    // in this block).
    mv.visitTryCatchBlock(tryLabel, dispatchLabel, catchLabel, null);

    // Goto to table switch dispatcher
    mv.visitJumpInsn(Opcodes.GOTO, dispatchLabel);

    // Wrap the whole original body with try...catch that will invoke
    // cont.setException(Throwable t)
    mv.visitLabel(tryLabel);

    // Restore the frame as it was before changing method arguments
    Type[] locs = info.entryLocals;
    Object[] frame = new Object[info.isStatic() ? locs.length : locs.length + 1];

    // Frame
    if (!info.isStatic()) {
        frame[0] = info.owner;
    }

    int off = info.isStatic() ? 0 : 1;
    for (int i = 0; i < locs.length; ++i) {
        frame[off + i] = Frames.toFrameType(locs[i]);
    }

    mv.visitFrame(Opcodes.F_FULL, frame.length, frame, 0, new Object[0]);
    Label label = new Label();
    dispatchTable.add(label);
    mv.visitLabel(label);

    if (!info.isStatic()) {
        locals.add(Type.getObjectType(info.owner));
    }
    Collections.addAll(locals, locs);

    // Restore the original method arguments
    // argX = state.varX
    String[] names = info.entryLocalsVars;
    for (int i = 0; i < info.entryLocals.length; ++i) {
        // We go directly to target, introduced var used
        target.visitVarInsn(Opcodes.ALOAD, info.isStatic() ? 0 : 1);
        mv.visitFieldInsn(Opcodes.GETFIELD, info.stateClassName, names[i], info.entryLocals[i].getDescriptor());
        mv.visitVarInsn(info.entryLocals[i].getOpcode(Opcodes.ISTORE), info.isStatic() ? i : i + 1);

    }
}