Christian at 17:20, 20 August 2016

2016-08-20T17:20:30Z

← Older revision		Revision as of 19:20, 20 August 2016
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	~~(copy from Hung Viet Nguyen's thesis)~~		Change introduces conflict into software ecosystems: breaking changes may ripple through the ecosystem and trigger rework for users of a package, but often developers can invest additional effort or accept opportunity costs to alleviate or delay downstream costs. We performed a multiple case study of three software ecosystems with different tooling and philosophies toward change, Eclipse, R/CRAN, and Node.js/npm, to understand how developers make decisions about change and change-related costs and what practices, tooling, and policies are used. We found that all three ecosystems differ substantially in their practices and expectations toward change and that those differences can be explained largely by different community values in each ecosystem. Our results illustrate that there is a large design space in how to build an ecosystem, its policies and its supporting infrastructure; and there is value in making community values and accepted tradeoffs explicit and transparent in order to resolve conflicts and negotiate change-related costs.

	~~Web applications have become one of~~ the ~~most important~~ and ~~prevalent types~~ of
	~~software~~. ~~In modern web applications, the display~~ of ~~any web page is usually an interplay~~
	~~of multiple languages~~ and ~~involves code execution at different locations (the server side~~,
	~~the database side~~, and ~~the client side)~~. ~~These characteristics~~ make ~~it hard to write~~ and
	~~maintain web applications. Much of the existing research~~ and ~~tool support often deals~~
	~~with one single language~~ and ~~therefore is still limited in addressing those challenges~~.
	~~To fill~~ in ~~this gap, this work is aims at developing an infrastructure for cross-~~
	~~language program analysis for dynamic web applications to support creating reliable~~ and
	~~robust web applications with higher quality~~ and ~~lower costs. To reach~~ that ~~goal, we~~
	~~have developed the following research components~~. ~~First, to understand the client-side~~
	~~code~~ that is ~~embedded~~ in ~~the server-side code, we develop~~ an ~~output-oriented symbolic~~
	~~execution engine that approximates all possible outputs of a server-side program. Second~~,
	~~we use variability-aware parsing, a technique recently developed for parsing conditional~~
	~~code~~ in ~~software product lines, to parse those outputs into a compact tree representation~~
	~~(called VarDOM ) that represents all possible DOM variants of a web application. Third,~~
	~~we leverage the VarDOM to extract semantic information from the server-side code.~~
	~~Specifically, we develop novel concepts, techniques,~~ and ~~tools (1) to build call graphs~~
	~~for embedded client code~~ in ~~different languages, (2)~~ to ~~compute cross-language program~~
	~~slices,~~ and ~~(3) to compute a novel test coverage criterion called output coverage that~~
	~~aids testers in creating effective test suites for detecting output~~-related ~~bugs. The results~~
	~~have been demonstrated in a wide range of applications for web programs such as IDE~~
	~~services, fault localization, bug detection, and testing~~.

Christian: Created page with "(copy from Hung Viet Nguyen's thesis) Web applications have become one of the most important and prevalent types of software. In modern web applications, the display of any w..."

2016-08-12T12:35:37Z

Created page with "(copy from Hung Viet Nguyen's thesis) Web applications have become one of the most important and prevalent types of software. In modern web applications, the display of any w..."

New page

(copy from Hung Viet Nguyen's thesis)

Web applications have become one of the most important and prevalent types of
software. In modern web applications, the display of any web page is usually an interplay
of multiple languages and involves code execution at different locations (the server side,
the database side, and the client side). These characteristics make it hard to write and
maintain web applications. Much of the existing research and tool support often deals
with one single language and therefore is still limited in addressing those challenges.
To fill in this gap, this work is aims at developing an infrastructure for cross-
language program analysis for dynamic web applications to support creating reliable and
robust web applications with higher quality and lower costs. To reach that goal, we
have developed the following research components. First, to understand the client-side
code that is embedded in the server-side code, we develop an output-oriented symbolic
execution engine that approximates all possible outputs of a server-side program. Second,
we use variability-aware parsing, a technique recently developed for parsing conditional
code in software product lines, to parse those outputs into a compact tree representation
(called VarDOM ) that represents all possible DOM variants of a web application. Third,
we leverage the VarDOM to extract semantic information from the server-side code.
Specifically, we develop novel concepts, techniques, and tools (1) to build call graphs
for embedded client code in different languages, (2) to compute cross-language program
slices, and (3) to compute a novel test coverage criterion called output coverage that
aids testers in creating effective test suites for detecting output-related bugs. The results
have been demonstrated in a wide range of applications for web programs such as IDE
services, fault localization, bug detection, and testing.

WG211/M16Kaestner - Revision history

Christian at 17:20, 20 August 2016

Christian: Created page with "(copy from Hung Viet Nguyen's thesis) Web applications have become one of the most important and prevalent types of software. In modern web applications, the display of any w..."