Feature Location via Information Retrieval based Filtering of a Single Scenario Execution Trace
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1 Feature Location via Information Retrieval based Filtering of a Single Scenario Execution Trace Dapeng Liu, Andrian Marcus, Denys Poshyvanyk, Václav Rajlich SEVERE
2 Incremental Change of Software Change request Feature location Impact analysis Implementation Change propagation Testing
3 Incremental Change of Software Change request Feature location Impact analysis Implementation Change propagation Testing
4 Feature Location with Regular Expressions
5 Feature Location with Information Retrieval [Marcus 04]
6 Feature Location with Information Retrieval and Formal Concept Analysis [Poshyvanyk 07]
7 Feature Location with Software Reconnaissance Scenario NOT exercising the feature readanddispatch -- org.eclipse.swt.widgets.display checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display [Wilde 92] Scenario exercising the feature checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display WM_TIMER -- org.eclipse.swt.widgets.progressbar
![eclipse.swt.graphics.eclipse.swt.widgets.display WM_TIMER -- org.eclipse.swt.widgets.progressbar [Antoniol 06]](/docs-images/80/81928405/images/8-2.jpg)
8 Feature Location with Scenario-based Probabilistic Ranking Scenario NOT exercising the feature readanddispatch -- org.eclipse.swt.widgets.display checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display Scenario exercising the feature checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display WM_TIMER -- org.eclipse.swt.widgets.progressbar [Antoniol 06]
9 Feature Location with Probabilistic Ranking Of MEthodS and Information Retrieval Scenario NOT exercising the feature readanddispatch -- org.eclipse.swt.widgets.display checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display Scenario exercising the feature checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display [Poshyvanyk 07]
10 Single Execution Trace readanddispatch -- org.eclipse.swt.widgets.display checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display readanddispatch -- org.eclipse.swt.widgets.display checkdevice -- org.eclipse.swt.widgets.display isdisposed -- org.eclipse.swt.graphics.device drawmenubars -- org.eclipse.swt.widgets.display runpopups -- org.eclipse.swt.widgets.display filtermessage -- org.eclipse.swt.widgets.display SITIR = SIngle Trace + Information Retrieval (SITIR)
11 Filtering Single Execution Trace with Information Retrieval 1 Query Information Retrieval Engine 5 Indexes 6 Ranks User 7 Results SITIR Source Code 4 Execution trace 2 Scenario 3 Tracer Events
12 Collecting Execution Traces Java Platform Debugger Architecture (JPDA) 1 Infrastructure to build end-user debugging applications for Java platform JPDA highlights: Debugger works on a separate virtual machine Minimal interference of a tracing tool with a subject program Separate thread-based traces Marked traces (start/stop recording) 1
13 Indexing Source Code with Latent Semantic Indexing Parsing to extract semantic information (i.e., comments and identifiers) Pre-processing: split_identifiers & SplitIdentifiers Representing software systems as a termdocument matrix
14 Example of using SITIR Locating a feature in JEdit Feature: showing white-space as a visible symbol in the text area Steps: Run scenario Run query Explore results
15 Example of using SITIR Locating a Feature in JEdit Start Tracing
16 Example of using SITIR Locating a Feature in JEdit Stop Tracing
17 Example of using SITIR Results SITIR IR-based ranking Single Trace Number of methods in single trace 284 The position of the first relevant method according to IR ranking 56 Position of the first relevant method according to SITIR - 7
18 Case Studies Locating features in JEdit Locating features associated with bugs in Eclipse Case study objectives: Compare SITIR with other approaches Study the impact of full and marked traces on the results Study the impact of user queries on the results
19 Locating Features in JEdit Evaluation the position of the first relevant method Feature MARKED TRACE LSI SITIR Search (36) 1 14 (9) Show whitespace (43) 7 (5) Add marker Refined queries are in parentheses
20 Different Users and Queries Feature # Query Search Show white space Add marker 1 search find phrase word text 2 search final all forward backward case sensitive 3 find search locate match indexof findnext 4 searchdialog find findbtn searchselection save searchfileset searchandreplace 1 red dot newline whitespace view show display tab 2 show hide whitespace blank space display 3 symbol replace changecolor setvisible addlayer whitespace loadsymbol 4 userinput textareapainter paint whitespace newline pnt 1 marker select word display text 2 add remove marker markers 3 select highlight mark change background 4 buffer addmarker marker selection
21 Results for Different Users and Queries Full Marked Feature Dev LSI Trace Trace SITIR full SITIR marked Search Show white space Add marker
22 Full versus Marked Traces in SITIR Re-formulating queries on full traces brings no visible improvement to the results Using marked traces vice full with the same query always produces noticeable improvement to the results Observed improvement: reformulating a query and marking the trace at the same time!
23 Locating Features in Eclipse Comparing SITIR with PROMESIR Eclipse K classes; 89K methods; 2.3MLOC; 57K unique words Features associated with bugs: Well-known, documented and reproducible Approved patches applied in recent releases We locate the part of the feature associated with the bug
24 Locating Features in Eclipse - Results Feature SINGLE TRACE SPR PROMESIR SITIR Select Add files Search
25 Discussion Uses only single scenario Less sensitive to scenario selection Unobtrusive tracing mechanism IR-based indexing of source code can be easily extended to other languages SITIR results are comparable or better than other feature location methods
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