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检索条件"任意字段=7th International Conference on Principles and Practice of Programming in Java, PPPJ 2009"

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Proceedings of the 7th international conference on principles and practice of programming in java, pppj 2009

Proceedings of the 7th International Conference on Principle...

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7th international conference on principles and practice of programming in java, pppj 2009

ISBN: (纸本)9781605585987

the proceedings contain 22 papers. the topics discussed include: actor frameworks for the JVM platform: a comparative analysis;development of a java-based unified and flexible natural language discourse system;java for high performance computing: assessment of current research and practice;a framework for constructing peer-to-peer overlay networks in java;unit test support for java via reflection and annotations;three approaches to object evolution;parsing fortress syntax;a discipline of tree processing;automatic parallelization for graphics processing units;the use of hardware transactional memory for the trace-based parallelization of recursive java programs;parallelizing calling context profiling in virtual machines on multicores;and analyzing performance and dynamic behavior of embedded java software with calling-context cross-profiling.

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MAJOR: Rapid tool development with aspect-oriented programming 09

MAJOR: Rapid tool development with aspect-oriented programmi...

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Villazón, Alex Binder, Walter Moret, Philippe Ansaloni, Danilo Faculty of Informatics University of Lugano Switzerland

ISBN: (纸本)9781605585987

the use of low-level techniques, such as bytecode instrumentation to develop tools for profiling, debugging, testing, and reverse engineering is error-prone, time-consuming, and therefore costly. As a solution to these problems, we promote high-level aspect-oriented programming for rapid tool development so as to hide low-level instrumentation details from the developer. We show that our aspect-based approach yields concise tools that are easy to develop and extend, hence reducing development and testing costs. As enabling technology, we rely on MAJOR, a new tool for comprehensive aspect weaving, which ensures that aspects are woven into all methods executing in a java Virtual Machine (after an initial bootstrapping phase), including methods in the standard java class library. MAJOR also supports efficient access to a complete and customizable calling context representation thanks to the pluggable module CARAJillo. Both comprehensive aspect weaving and efficient access to calling context information are of paramount importance in the aforementioned domains. Copyright 2009 ACM.

关键词： Reverse engineering

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the use of hardware transactional memory for the trace-based parallelization of recursive java programs 09

The use of hardware transactional memory for the trace-based...

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Bradel, Borys J. Abdelrahman, Tarek S. Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ON M5S 3G4 Canada

ISBN: (纸本)9781605585987

We describe a framework for trace-based parallelization of recursive java programs. We also explore and evaluate the feasibility of using a hardware transactional memory (HTM) system to handle dependences. We design, implement, and evaluate a system that takes as input a sequential program, identifies traces on it, and groups these traces into coarse-grain units of computation, or tasks. We then insert code that allows tasks to execute in parallel transactions using a fork/join paradigm. We also present a software algorithm that ensures sequential program order is maintained by transactional memory. We identify the associated issues and describe criteria that are necessary for java programs to execute successfully on HTM systems. Our evaluation using JOlden benchmarks indicates that the computational phases of the benchmarks can be executed effectively on HTM systems. the average speedup is 2.7 for four processors. We conclude that HTM is a viable solution to dealing with dependences when performing trace-based parallelization. Copyright 2009 ACM.

关键词： java programming language

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Safer typing of complex API usage through java generics 09

Safer typing of complex API usage through java generics

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Harrison, William Lievens, David Simeoni, Fabio Software Structure Group Dept. of Computer Science Trinity College Dublin Ireland Dept. of Computer and Information Sciences University of Strathclyde United Kingdom

ISBN: (纸本)9781605585987

When several incompatible implementations of a single API are in use in a java program, the danger exists that instances from different implementations may inadvertently be mixed, leading to errors. In this paper we show how to use generics to prevent such mixing. the core idea of the approach is to add a type parameter to the interfaces of the API, and tie the classes that make up an implementation to a unique choice of type parameter. In this way methods of the API can only be invoked with arguments that belong to the same implementation. We show that the presence of a type parameter in the interfaces does not violate the principle of interface-based programming: clients can still completely abstract over the choice of implementation. In addition, we demonstrate how code can be reused between different implementations, how implementations can be defined as extensions of other implementations, and how different implementations may be mixed in a controlled and safe manner. To explore the feasibility of the approach, gauge its usability, and identify any issues that may crop up in practical usage, we have refactored a fairly large existing API-based application suite, and we report on the experience gained in the process. Copyright 2009 ACM.

关键词： java programming language

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Virtual reuse distance analysis of SPECjvm2008 data locality 09

Virtual reuse distance analysis of SPECjvm2008 data locality

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Gu, Xiaoming Li, Xiao-Feng Cheng, Buqi Huang, Eric Intel China Research Center China

ISBN: (纸本)9781605585987

Reuse distance analysis has been proved promising in evaluating and predicting data locality for programs written in Fortran or C/C++. But its e ect has not been examined for applications in managed runtime environments, where there is no concept of memory address. For this reason, traditional reuse distance analysis based on memory addresses is not directly applicable to these applications. this paper presents the Virtual Reuse Distance Analysis (ViRDA), which resolves the difficulties associated with runtime environments and provides insights into the high-level locality in dynamic applications. ViRDA addresses the problem caused by managed runtime artifacts, garbage collection in particular, by using virtual data identities, obtained through a standard profiling interface, to capture inherent data locality. the effectiveness of ViRDA is evaluated using a subset of the SPECjvm2008 benchmark suite. the new analysis reveals the reuse distance signatures of these programs and helps to explain the cause of excessive cache misses. It also predicts locality for large inputs based on training analysis of several small inputs. the prediction error is no more than 6% for the 4 scimark workloads. Copyright 2009 ACM.

关键词： C++ (programming language)

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Tracking performance across software revisions 09

Tracking performance across software revisions

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Mostafa, Nagy Krintz, Chandra Computer Science Department University of California Santa Barbara CA United States

ISBN: (纸本)9781605585987

Repository-based revision control systems such as CVS, RCS, Subversion, and GIT, are extremely useful tools that enable software developers to concurrently modify source code, manage conflicting changes, and commit updates as new revisions. Such systems facilitate collaboration with and concurrent contribution to shared source code by large developer bases. In this work, we investigate a framework for "performance-aware" repository and revision control for java programs. Our system automatically tracks behavioral differences across revisions to provide developers with feedback as to how their change impacts performance of the application. It does so as part of the repository commit process by profiling the performance of the program or component, and performing automatic analyses that identify differences in the dynamic behavior or performance between two code revisions. In this paper, we present our system that is based upon and extends prior work on calling context tree (CCT) profiling and performance differencing. Our framework couples the use of precise CCT information annotated with performance metrics and call-site information, with a simple tree comparison technique and novel heuristics that together target the cause of performance differences between code revisions without knowledge of program semantics. We evaluate the efficacy of the framework using a number of open source java applications and present a case study in which we use the framework to distinguish two revisions of the popular FindBugs application. Copyright 2009 ACM.

关键词： java programming language

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Parallelizing calling context profiling in virtual machines on multicores 09

Parallelizing calling context profiling in virtual machines ...

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Binder, Walter Ansaloni, Danilo Villazón, Alex Moret, Philippe Faculty of Informatics University of Lugano Switzerland

ISBN: (纸本)9781605585987

the Calling Context Tree (CCT) is a prevailing datastructure for calling context profiling. As generating a complete CCT reflecting every method call is expensive, recent research has focused on efficiently approximating the CCT with sampling techniques. However, for tasks such as debugging, testing, and reverse engineering, complete and accurate CCTs are often needed. In this paper, we introduce the ParCCT, a novel approach to parallelizing application code and CCT generation on multicores. Each thread maintains a shadow stack and generates "packets" of method calls and returns that correspond to partial CCTs. Each packet includes a copy of the shadow stack, indicating the calling context of the first method call in the packet. Hence, packets are independent of each other and can be processed out-of-order and in parallel in order to update the CCT. Our portable and extensible implementation targets standard java Virtual Machines, thanks to instrumentation techniques that ensure complete bytecode coverage and efficiently support custom calling context representations. the ParCCT is more than 110% faster than a primitive, non-parallel approach to CCT construction, when more than two cores are available. this speedup stems both from reduced contention and from parallelization. Copyright 2009 ACM.

关键词： Aspect oriented programming

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java for high performance computing: Assessment of current research and practice 09

Java for high performance computing: Assessment of current r...

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7th international conference on principles and practice of programming in java, pppj 2009

作者： Taboada, Guillermo L. Touriño, Juan Doallo, Ramón Computer Architecture Group University of a Coruña A Coruña Spain

ISBN: (纸本)9781605585987

the rising interest in java for High Performance Computing (HPC) is based on the appealing features of this language for programming multi-core cluster architectures, particularly the built-in networking and multithreading support, and the continuous increase in java Virtual Machine (JVM) performance. However, its adoption in this area is being delayed by the lack of analysis of the existing programming options in java for HPC and evaluations of their performance, as well as the unawareness of the current research projects in this field, whose solutions are needed in order to boost the embracement of java in HPC. this paper analyzes the current state of java for HPC, both for shared and distributed memory programming, presents related research projects, and finally, evaluates the performance of current java HPC solutions and research developments on a multi-core cluster with a high-speed network, InfiniBand, and a 24-core shared memory machine. the main conclusions are that: (1) the significant interest on java for HPC has led to the development of numerous projects, although usually quite modest, which may have prevented a higher development of java in this field;and (2) java can achieve almost similar performance to native languages, both for sequential and parallel applications, being an alternative for HPC programming. thus, the good prospects of java in this area are attracting the attention of both industry and academia, which can take significant advantage of java adoption in HPC. Copyright 2009 ACM.

关键词： Message passing

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Object reuse and behavior adaptation in java-like languages* 11

Object reuse and behavior adaptation in Java-like languages*

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9th international conference on principles and practice of programming in java, pppj 2011

作者： Bettini, Lorenzo Venneri, Betti Dip. di Informatica Università di Torino Corso Svizzera 185 10149 Torino Italy Dip. di Sistemi e Informatica Universitá di Firenze Viale Morgagni 65 50134 Firenze Italy

ISBN: (纸本)9781450309356

Inheritance, which is a basic mechanism in mainstream objectoriented languages, introduces a strong coupling which limits modularity and code reuse. Furthermore, static class hierarchies cannot easily deal with unpredictable dynamic adaptations of the object behavior. In order to overcome these limitations, we propose new linguistic constructs for composing objects in a java-like language. Objects are intended as featherweight components which can be used in multiple compositions, and object types specify not only the implemented functionalities, but also the required methods, which will be provided by other components during composition. thus the language supports flexible object reuse and adaptation of the object behavior at run time. the static type discipline guarantees that method calls on well-typed object compositions are safe. © 2011 ACM.

关键词： java programming language

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A prototypical java-like language with records and traits 10

A prototypical Java-like language with records and traits

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Proceedings of the 8th international conference on the principles and practice of programming in java

作者： Bettini, Lorenzo Damiani, Ferruccio Schaefer, Ina Strocco, Fabio Dipartimento di Informatica Università di Torino C.so Svizzera 185 10149 Torino Italy Chalmers University of Technology 421 96 Gothenburg Sweden

ISBN: (纸本)9781450302692

Traits have been designed as units of fine-grained behavior reuse in the object-oriented paradigm. In this paper, we present the language Sugared Welterweight Record-Trait java (SWRTJ), a java dialect with records and traits. Records have been devised to complement traits for fine-grained state reuse. Records and traits can be composed by explicit linguistic operations, allowing code manipulations to achieve fine-grained code reuse. Classes are assembled from (composite) records and traits and instantiated to generate objects. We present the prototypical implementation of SWRTJ using Xtext, an Eclipse framework for the development of programming languages as well as other domain-specific languages. Our implementation comprises an Eclipse-based editor for SWRTJ with typical IDE functionalities, and a stand-alone compiler, which translates SWRTJ programs into standard java programs. © 2010 ACM.

关键词： java programming language

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