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9th International Conference on Generative programming and Component Engineering

作者： Wuerthinger, Thomas Binder, Walter Ansaloni, Danilo Moret, Philippe Moessenboeck, Hanspeter Johannes Kepler Univ Linz Linz Austria Univ Lugano Lugano Switzerland

ISBN: (纸本)9781450301541

While dynamic code evolution in object-oriented systems is an important feature supported by dynamic languages, there is currently only limited support for dynamic code evolution in high-performance, state-of-the-art runtime systems for statically typed languages, such as the Java Virtual Machine. In this tool demonstration, we present the dynamic Code Evolution VM, which is based on a recent version of Oracle's state-of-the-art Java HotSpot (TM) VM and allows unlimited changes to loaded classes at runtime. Based on the dynamic Code Evolution VM, we developed an enhanced version of the Mantisse GUI builder (which is part of the NetBeans IDE) that allows adding GUI components without restarting the application under development. Furthermore, we redesigned the dynamic AOP framework HotWave to take advantage of the enhanced dynamic code evolution capabilities. The new version, HotWave2, now supports most aspectJ constructs, including around() advice and static cross-cutting. We will demonstrate both the enhanced Mantisse GUI builder as well as HotWave2, weaving several aspects for dynamic analysis in sizable applications at runtime.

关键词： Algorithms Languages dynamic aspect-oriented programming runtime weaving dynamic code evolution dynamic software updates code hotswapping Java Virtual Machine

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Applications of Enhanced dynamic Code Evolution for Java in GUI Development and dynamic aspect-oriented programming

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ACM SIGPLAN NOTICES 2011年第2期46卷 123-126页

作者： Wuerthinger, Thomas Binder, Walter Ansaloni, Danilo Moret, Philippe Moessenboeck, Hanspeter Johannes Kepler Univ Linz Linz Austria Univ Lugano Lugano Switzerland

关键词： Algorithms Languages dynamic aspect-oriented programming runtime weaving dynamic code evolution dynamic software updates code hotswapping Java Virtual Machine

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HotWave: Creating Adaptive Tools with dynamic aspect-oriented programming in Java 09

HotWave: Creating Adaptive Tools with Dynamic Aspect-Oriente...

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8th International Conference on Generative programming and Component Engineering

作者： Villazon, Alex Binder, Walter Ansaloni, Danilo Moret, Philippe Univ Lugano Fac Informat CH-6900 Lugano Switzerland

ISBN: (纸本)9781605584942

Developing tools for profiling, debugging, testing, and reverse engineering is error-prone, time-consuming, and therefore costly when using low-level techniques, such as bytecode instrumentation. As a solution to these problems, we promote tool development in Java using high-level aspect-oriented programming (AOP). We demonstrate that the use of aspects yields compact tools that are easy to develop and extend. As enabling technology, we rely on HotWave, a new tool for dynamic and comprehensive aspect weaving. HotWave reconciles compatibility with existing virtual machine and AOP technologies. It provides support for runtime adaptation of aspects and reweaving of previously loaded code, as well as the ability to weave aspects into all methods executing in a Java Virtual Machine, including methods in the standard Java class library. HotWave also features a new mechanism for efficiently passing data between advices that are woven into the same method. We demonstrate the benefits of HotWave's distinguishing features with two case studies in the area of profiling.

关键词： Algorithms Languages Measurement dynamic aspect-oriented programming runtime weaving bytecode instrumentation code hotswapping profiling aspectJ Java Virtual Machine

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Safe and Atomic Run-time Code Evolution for Java and its Application to dynamic AOP 11

Safe and Atomic Run-time Code Evolution for Java and its App...

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2th ACM International Conference on Systems, programming, Languages, and Applications: Software for Humanity (SPLASH)

作者： Wuerthinger, Thomas Ansaloni, Danilo Binder, Walter Wimmer, Christian Moessenboeck, Hanspeter Johannes Kepler Univ Linz Linz Austria

ISBN: (纸本)9781450309400

dynamic updates to running programs improve development productivity and reduce downtime of long-running applications. This feature is however severely limited in current virtual machines for object-oriented languages. In particular, changes to classes often apply only to methods invoked after a class change, but not to active methods on the call stack of threads. Additionally, adding and removing methods as well as fields is often not supported. We present a novel programming model for safe and atomic code updates of Java programs that also updates methods that are currently executed. We introduce safe update regions and pause threads only there before an update. We automatically convert the stack frames to suit the new versions of the methods. Our implementation is based on a production-quality Java virtual machine. Additionally, we present Safe Weave, a dynamic aspect-oriented programming system that exposes the atomic code updates through a high-level programming model. aspectJ advice can be added to and removed from a running application. Changes are atomic and correctness is guaranteed even though weaving happens in parallel to program execution, and the system fully supports the dynamic class loading of Java. We show that the enhanced evolution features do not incur any performance penalty before and after version changes.

关键词： Java virtual machine run-time evolution code evolution dynamic software updating update regions dynamic aspect-oriented programming AOP aspectJ

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Advanced Runtime Adaptation for Java 09

Advanced Runtime Adaptation for Java

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8th International Conference on Generative programming and Component Engineering

作者： Villazon, Alex Binder, Walter Ansaloni, Danilo Moret, Philippe Univ Lugano Fac Informat CH-6900 Lugano Switzerland

ISBN: (纸本)9781605584942

dynamic aspect-oriented programming (AOP) enables runtime adaptation of aspects, which is important for building sophisticated, aspect-based software engineering tools, such as adaptive profilers or debuggers that dynamically modify instrumentation code in response to user interactions. Today, many AOP frameworks for Java, notably aspectJ, focus on aspect weaving at compile-time or at load-time, and offer only limited support for aspect adaptation and reweaving at runtime. In this paper, we introduce HotWave, an AOP framework based on aspectJ for standard Java Virtual Machines (JVMs). HotWave supports dynamic (re) weaving of previously loaded classes, and it ensures that all classes loaded in a JVM can be (re) woven, including the classes of the standard Java class library. HotWave features a novel mechanism for inter-advice communication, enabling efficient data passing between advices that are woven into the same method. We explain HotWave's programming model and discuss our implementation techniques. As case study, we present an adaptive, aspect-based profiler that leverages HotWave's distinguishing features.

关键词： Algorithms Languages Measurement dynamic aspect-oriented programming runtime aspect adaptation and (re) weaving bytecode instrumentation code hotswapping aspectJ Java Virtual Machine

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