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Concurrency in Mobile Browser Engines

IEEE PERVASIVE COMPUTING 2015年第3期14卷 14-19页

作者： Cascaval, Calin Ortego, Pablo Montesinos Robatmili, Behnam Gracia, Dario Suarez Qualcomm Res Silicon Valley San Diego CA 92108 USA

Web browsers are one of the most pervasive applications for an entire range of personal computing platforms--from mobile devices to desktops. Using Web technologies (HTML, CSS, javascript) to build "Web apps" has the promise of creating portable applications for all platforms. Thus browsers become application containers, requiring increased performance from browser engines. Here, the authors discuss advances in browser technologies that exploit multicore processing. They use the Zoomm browser and the MuscalietJS javascript engine as running examples of highly concurrent Web browser and javascript engines. They show how concurrency is effectively exploited at different levels: to speed up computation performance, preload network resources, and preprocess resources outside the critical path to speed up page loading and Web workloads.

关键词： Concurrency Computers Internet java Mobile Computing Multiprocessing Systems Online Front Ends Mobile Browser Engines Pervasive Applications Personal Computing Platforms Desktops Mobile Devices Web Technologies Portable Applications HTML CSS java script Zoomm Browser Muscaliet JS java script Engine Concurrent Web Browser Preload Network Resources Web Workloads Page Loading Browsers HTML Mobile Communication Cascading Style Sheets Prefetching Concurrent Computing Web Services Pervasive Computing Smartphones Mobile Internet Web Technologies Networking Hardware Browsers Web Technologies Web Apps Browser Engines

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javascript脚本恶意代码检测系统

JavaScript脚本恶意代码检测系统

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作者：赵梓旭哈尔滨工业大学

学位级别：硕士

现阶段人们更倾向使用快捷、方便的互联网服务,与此同时,由于人们对自身互联网安全意识薄弱,或因互联网具有很强的开放性而易于遭受黑客们的攻击。黑客们具有多种攻击方式,在浩繁的攻击方式中,一种非常盛行的进攻方式是将java script脚... 详细信息

现阶段人们更倾向使用快捷、方便的互联网服务,与此同时,由于人们对自身互联网安全意识薄弱,或因互联网具有很强的开放性而易于遭受黑客们的攻击。黑客们具有多种攻击方式,在浩繁的攻击方式中,一种非常盛行的进攻方式是将java script脚本直接作为攻击的载体,使用浏览器漏洞及其插件中的漏洞,对访问互联网的用户进行恶意攻击。这种在网页java script脚本中嵌入木马进攻方式对互联网的安全保障形成巨大威胁。人们对java script脚本攻击采用过一些办法,如传统的基于静态特征码的反病毒引擎检测方式主要采用特征码匹配的技术检测java script脚本木马,但这种防御方法具有一定局限性,其在于难以检测经过加密变形的恶意代码,同时静态特征库也会因时间变化而不断增大,从而使检测性能大幅降低。或如基于执行的动态检测方法,可以跟踪java script脚本代码对内存和栈的跟踪判断是否存在恶意操作,这种方法也有一定的局限性,在批量分析时,效率较低。因此,需要提出高效静态检测的算法,加入基于机器学习的回归预测计算,使其有效检测恶意java script脚本代码。本论文提出一种java script脚本检测方法,其可以实现对java script脚本是否恶意进行分类。该方法首先提出使用一种动静态结合的检测模型的检测方法,其实现方法为:对传统静态检测方法进行算法优化,提取适合本检测系统的特征,优化机器学习中支持向量机的部分算法,实现高效率的静态检测方式。随后提取机器代码的函数调用序列,提出了基于虚拟执行的技术作为模型中高级检测部分,实现基于动静态结合检测模型的java script脚本检测系统。本论文所提出的检测系统具有很高的检测性能,与同类反病毒引擎相比,其检测具有加密混淆的java script时效果更为出色,并提供给浏览器、反病毒引擎等接口,具有很高的应用价值。

关键词： java script 恶意检测动静态结合检测模型支持向量机虚拟执行

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基于B/S保险公司客户管理系统设计与实现

基于B/S保险公司客户管理系统设计与实现

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作者：闫晓莹吉林大学

学位级别：硕士

我国居民生活水平的提升使得居民投保意愿和投保数量也随之上升,进而使得近几年我国保险行业发展迅速。尽管居民投保意识有所增加,但各保险企业仍然需要对投保客户进行资源争夺,在争夺过程中保险企业的客户管理等将和产品起到决定性作... 详细信息

我国居民生活水平的提升使得居民投保意愿和投保数量也随之上升,进而使得近几年我国保险行业发展迅速。尽管居民投保意识有所增加,但各保险企业仍然需要对投保客户进行资源争夺,在争夺过程中保险企业的客户管理等将和产品起到决定性作用。因此能够快速、高效、多途径让投保客户了解保险产品成为有效途径。本论文在综合阐述保险业务办理流程的基础上,并依据本系统所划分的预期用户:系统管理员、投保客户(潜在投保客户)、保险公司业务人员(保险公司销售人员),总结了本系统的六个主要设计目标,根据可行性分析表明本系统具备一定的可行性。进而为实现本系统的设计目标,进行了系统功能性需求分析及功能设计、系统非功能性需求分析。在系统功能性需求分析及功能设计中,针对系统管理员、投保客户、保险公司业务人员这三类用户在系统操作中可能产生的需求,为满足上述操作需求,本文将系统主要功能总结为:系统用户登录、系统用户管理、投保客户信息管理、保险产品信息管理、投保单管理、投保合同信息管理等,并对各个总功能进行了详细划分,通过各主要功能实现对保险产品、投保单、投保客户等信息的管理(添加、查询、修改等)。基于需求分析和功能设计,将系统模块详细划分为七个功能模块,包括了系统登录模块、投保单管理模块等,在各功能模块设计中详细介绍各子功能的主要操作、实现流程图、操作时序图。为实现本系统,在系统设计基础上进行系统架构设计,采用了经典三层架构(表示层UILayer、业务逻辑层BLLayer、数据访问层DALayer)。本系统的数据库设计涵盖数据库概念结构设计和数据表设计,通过梳理各实体间的依赖关系,总结本系统的总体E-R图,详细设计了包含系统管理员信息表、投保客户信息表等六个信息实体表。依托B/S模式、java script、JSP等,采用Microsoft SQL Server 2005作为系统数据开发工具,实现了本系统的各功能。保险公司客户管理系统通过客户管理、保险产品管理等功能有利于对客户信息进行集中管理,多途径进行保险产品详细信息的查询,投保单和投保合同的线上录入、查询等,将有效提升业务员工作效率。同时从单元测试和集成测试两个方面进行了系统测试,并给出了主要测试用例的测试结果图,测试结果表明系统具备操作性。

关键词：保险公司客户管理系统 B/S模式 java script

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Oral-facial-digital syndrome type VI: is C5orf42 really the major gene?

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HUMAN GENETICS 2015年第1期134卷 123-126页

作者： Romani, Marta Mancini, Francesca Micalizzi, Alessia Poretti, Andrea Miccinilli, Elide Accorsi, Patrizia Avola, Emanuela Bertini, Enrico Borgatti, Renato Romaniello, Romina Ceylaner, Serdar Coppola, Giangennaro D'Arrigo, Stefano Giordano, Lucio Janecke, Andreas R. Lituania, Mario Ludwig, Kathrin Martorell, Loreto Mazza, Tommaso Odent, Sylvie Pinelli, Lorenzo Poo, Pilar Santucci, Margherita Signorini, Sabrina Simonati, Alessandro Spiegel, Ronen Stanzial, Franco Steinlin, Maja Tabarki, Brahim Wolf, Nicole I. Zibordi, Federica Boltshauser, Eugen Valente, Enza Maria IRCCS Casa Sollievo Sofferenza Lab Mendel I-00198 Rome Italy Univ Messina Dept Biol & Environm Sci Messina Italy Johns Hopkins Sch Med Div Pediat Radiol Sect Pediat Neuroradiol Baltimore MD USA Spedali Civil Brescia Pediat Neuropsychiat Div I-25125 Brescia Italy IRCCS Assoc Oasi Maria Santissima Unit Pediat & Med Genet Troina Italy Bambino Gesu Childrens Res Hosp Unit Neuromuscular & Neurodegenerat Disorders Mol Med Lab Rome Italy IRCCS Eugenio Medea Inst Sci Neuropsychiat & Neurorehabil Unit Bosisio Parini Lecco Italy Intergen Genet Diag Res & Educ Ctr Ankara Turkey Univ Salerno Dept Med & Surg Sect Neurosci I-84100 Salerno Italy Fdn IRCCS Ist Neurol C Besta Dev Neurol Div Milan Italy Med Univ Innsbruck Dept Pediat 1 A-6020 Innsbruck Austria Med Univ Innsbruck Div Human Genet A-6020 Innsbruck Austria Galliera Hosp Genoa Italy Univ Padua Dept Med DIMED Surg Pathol & Cytopathol Unit Padua Italy Hosp St Joan de Deu Dept Mol Genet Barcelona Spain CHU Hop Sud Gen Med Serv Rennes France Spedali Civil Brescia Dept Neuroradiol I-25125 Brescia Italy Hosp St Joan de Deu Dept Neurol Barcelona Spain IRCCS Ist Sci Neurol Pediat Neuropsychiat Unit Bologna Italy C Mondino Natl Neurol Inst Ctr Child Neuroophthalmol Unit Child Neurol & Psychiat Pavia Italy Univ Verona Dept Neurol Sci & Movement Neurol Child Neurol I-37100 Verona Italy Emek Med Ctr Genet Inst Afula Israel Reg Hosp Bolzano Genet Counselling Serv Dept Pediat Bolzano Italy Univ Childrens Hosp Dept Pediat Neurol Bern Switzerland Prince Sultan Mil Med City Div Pediat Neurol Riyadh Saudi Arabia

Oral-facial-digital type VI syndrome (OFDVI) is a rare phenotype of Joubert syndrome (JS). Recently, C5orf42 was suggested as the major OFDVI gene, being mutated in 9 of 11 families (82 %). We sequenced C5orf42 in 313 JS probands and identified mutations in 28 (8.9 %), most with a phenotype of pure JS. Only 2 out of 17 OFDVI patients (11.7 %) were mutated. A comparison of mutated vs. non-mutated OFDVI patients showed that preaxial and mesoaxial polydactyly, hypothalamic hamartoma and other congenital defects may predict C5orf42 mutations, while tongue hamartomas are more common in negative patients.

关键词： Congenital defect major genes Phenotype C5orf42 gene MUTATE virtual instrument java script

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John Resig: Building JQuery

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COMPUTER 2015年第5期48卷 7-8页

作者： Severance, Charles Univ Michigan Sch Informat Ann Arbor MI 48109 USA

John Resig discusses the birth of the javascript library jQuery and how it came to play a key role in the browser software ecosystem.

关键词： Browser Software Computing Conversations John Resig J Query java script

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Vamonos: Embeddable Visualizations of Advanced Algorithms 45

Vamonos: Embeddable Visualizations of Advanced Algorithms

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45th Annual Frontiers in Education Conference (FIE)

作者： Carmer, Brent Rosulek, Mike Oregon State Univ Corvallis OR 97331 USA

ISBN: (纸本)9781479984541

We present Vamonos: a new framework for algorithm visualization, designed from the beginning to support embedding, interaction, and unlimited scope. Visualizations are executed entirely client-side on any device that supports a modern web browser;they can be embedded into any website or online textbook. Users can specify breakpoints, watched variables, provide inputs to the algorithm (e.g., by drawing a graph using a mouse), and be prompted for interaction by the visualization. The core framework supports any algorithms and data structures that can be implemented in javascript. We have implemented a wide range of visualizations of advanced algorithms topics, including dynamic programming and graph algorithms (e.g., spanning tree, max-flow, bipartite matching algorithms).

关键词： Visualization Web Browser algorithms Graph algorithms Breakpoints websites dynamic programming java script Maximum Flow

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A Simple framework for extending BOM/DOM APIs on Chromium based browser for Android OS 12

A Simple framework for extending BOM/DOM APIs on Chromium ba...

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12 IEEE Int C Elect Energy Env Communications Computer Control

作者： Singhai, Amit Kumar, Praveen Laker, Priyesh Bansal, Aditi Samsung R&D Inst India Bangalore SRI B Web Solut Grp Bangalore Karnataka India

ISBN: (纸本)9781467365406

In this paper we propose a simple solution for the problem of providing additional functionality for web content apart from what a typical web browser provides by default. There are multiple solutions such as browser plugins which are installed separately and have their own lifecycle. Some browsers provide custom java script objects to access additional functionality by embedding precompiled javascript and native code. In this research we find out an application layer approach to add and expose additional functionality into a chromium engine based browser. The functionality is exposed as very generic extension to BOM/DOM APIs, so that the content developers do not have to deal with customized object names which vary from browser vendor to vendor. This BOM/DOM extension also helps the browser vendors in reducing dependence on out of the box plugin installations at the same time make content development easy with typical javascript or other UI libraries. As part of same research we find out typical execution time for executing various API calls, which can help architects and designers in designing such a system with optimal performance needed for their respective web applications.

关键词： Browser object model web browser Document object model java script chromium android Content View

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A Parallel Abstract Interpreter for javascript

A Parallel Abstract Interpreter for JavaScript

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Proceedings of the IEEE/ACM International Symposium on Code Generation and Optimization (CGO)

作者： Dewey, Kyle Kashyap, Vineeth Hardekopf, Ben Univ Calif Santa Barbara Santa Barbara CA 93106 USA

ISBN: (纸本)9781479981625

We investigate parallelizing flow- and context-sensitive static analysis for javascript. Previous attempts to parallelize such analyses for other languages typically start with the traditional framework of sequential dataflow analysis, and then propose methods to parallelize the existing sequential algorithms within this framework. However, we show that this approach is non-optimal and propose a new perspective on program analysis based on abstract interpretation that separates the analysis into two components: (1) an embarrassingly parallel state exploration of a state transition system;and (2) a separate component that controls the size of the state space by selectively merging states, thus injecting sequential dependencies into the system. This perspective simplifies the parallelization problem and exposes useful opportunities to exploit the natural parallelism of the analysis. We apply our insights to parallelize a javascript abstract interpreter. Because of javascript's dynamic nature and tricky semantics, static analysis of javascript is difficult to scale-one of our benchmarks with only 2.8 KLOC takes over 22 hours to analyze using the sequential javascript abstract interpreter. Thus, javascript is an excellent case study for the benefits of our approach. Our resulting parallel implementation sees significant benefits on real-world javascript programs, with speedups between 2-4x on average with a superlinear maximum of 36.9x on 12 hardware threads.

关键词： state space analysis programme interpreters java script State Change Sequential Parallel Lines BENCHMARKS

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WebSee: A Tool for Debugging HTML Presentation Failures 8

WebSee: A Tool for Debugging HTML Presentation Failures

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8th IEEE International Conference on Software Testing, Verification and Validation Workshops (ICSTW)

作者： Mahajan, Sonal Halfond, William G. J. Univ Southern Calif Los Angeles CA 90089 USA

ISBN: (纸本)9781479971251

Presentation failures in a website can negatively impact end users' perception of the quality of the website, the services it delivers, and the branding a company is trying to achieve. Presentation failures can occur easily in modern web applications because of the highly complex and dynamic nature of the HTML, CSS, and javascript that define a web page's visual appearance. Debugging such failures manually is time consuming and error-prone, and existing techniques do not provide an automated debugging solution. In this paper, we present our tool, WebSee, that provides a fully automated debugging solution for presentation failures in web applications. When run on real-world web applications, WebSee was able to accurately and quickly identify faulty HTML elements.

关键词： web applications Debugging HyperText Markup Language websites java script error prone presentation Presentation failures

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Detecting Concurrency Errors in Client-side javascript Web Applications

Detecting Concurrency Errors in Client-side JavaScript Web A...

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7th IEEE International Conference on Software Testing, Verification and Validation (ICST)

作者： Hong, Shin Park, Yongbae Kim, Moonzoo Korea Adv Inst Sci & Technol Dept Comp Sci Taejon South Korea

ISBN: (纸本)9780769551852

As web technologies have evolved, the complexity of dynamic web applications has increased significantly and web applications suffer concurrency errors due to unexpected orders of interactions among web browsers, users, the network, and so forth. In this paper, we present WAVE (Web Application's Virtual Environment), a testing framework to detect concurrency errors in client-side web applications written in javascript. WAVE generates various sequences of operations as test cases for a web application and executes a sequence of operations by dynamically controlling interactions of a target web application with the execution environment. We demonstrate that WAVE is effective and efficient for detecting concurrency errors through experiments on eight examples and five non-trivial real-world web applications.

关键词： automated testing concurrency bug java script web testing

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