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研究生： 李登碩
Teng-Shuo Lee
論文名稱： 基於使用信號機及共享記憶體的並行軟體測試
Concurrent Testing of Semaphore-based and Shared-memory Software
指導教授： 黃冠寰
Hwang, Gwan-Hwan
學位類別： 碩士
Master
系所名稱： 資訊工程學系
Department of Computer Science and Information Engineering
論文出版年： 2010
畢業學年度： 98
語文別： 英文
論文頁數： 84
中文關鍵詞： 並行程式 、信號機 、共享記憶體 、非確定性行為 、並行測試 、同步序列 、可達性測試 、動態敏捷測試
英文關鍵詞： Concurrent program, Semaphore, Shared-memory, Nondeterministic behavior, Concurrent testing, SYN-sequence, Reachability testing, Dynamic Effective Testing
論文種類： 學術論文
相關次數： 點閱：171  下載：1 
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    • 並行程式在現代的計算中已經變得非常地普遍。然而，因為並行程式的非確定性行為，在並行程式中的錯誤通常都很難被偵測到。在電腦科學中信號機是其中一個主要的同步機制，在多元程式規劃中，它通常被用來控制共享資料的存取。對信號機的誤用是一個非常嚴重的問題，因為這可能導致程式發生死結或是造成一些對共享資料的違規存取。
    在這篇論文中，我們會描述如何將動態敏捷測試應用到測試使用信號機的並行程式。我們提出了一些可以對信號機的運算做前綴重播(prefix-based replay)和當死結發生時能夠記錄下程式狀態的協定。我們也針對使用信號機的程式定義了新的同步序列格式。然後，我們提出了一個演算法用來過濾掉被競爭分析(race analyzer)產生的不可行的競爭變異(race variant)。最後，我們發展了一個壓縮的功能來解決被重複的事件所引起的狀態空間爆炸(state space explosion)問題。如此一來，我們可以成功地針對使用信號機和共享記憶體的並行程式做狀態全覆(state-cover)的動態測試，並且可以產生使用信號機以及共享記憶體的並行程式的所有狀態以及所有在程式中的死結。

    Concurrent program is becoming commonplace in modern computing. However, the bugs in concurrent program are usually difficult to be detected because of the non-deterministic behavior of concurrent programs. Semaphore is one of the major synchronization mechanisms in computer science. It often used to control the access of shared data in a multiprogramming environment. The misuse of semaphore is a very serious problem, because this may cause the program deadlock or make some inappropriate access of shared data.
    In this thesis, we describe how to apply dynamic effective testing to semaphore-based concurrent programs. We propose some protocols that can perform prefix-based replay on semaphore operations and record the program status when the deadlock happened. We also define a novel format for the SYN-sequence of semaphore-based program. Then, we have an algorithm to filter out the infeasible race variants generated by race analyzer in reachability testing. Last, we develop a compression function to deal with the state space explosion problem induced by the reiterative events. Thus, we can successfully perform state-cover testing for semaphore-based and shared memory concurrent programs and find out all the states of the concurrent programs which contain shared semaphores and shared memories and all the deadlocks in the programs.

    LIST OF TABLES vii LIST OF FIGURES viii 1. Introduction 1 1.1 Non-deterministic behavior of concurrent programs 1 1.2 Dynamic testing 2 1.3 Dynamic testing on semaphore-based concurrent program 6 2. Related Work 10 3. Collect PVRW-sequence from the execution of semaphore-based programs 15 3.1 Prefix-based replay 15 3.2 PVRW-sequence 16 3.3 Entry and exit protocols for semaphore operations 23 4. Generation of feasible race variant 37 4.1 Generation of race variants 37 4.2 Infeasible race variant 39 4.3 Semantic violation race variant filter 42 4.4 Semaphore and shared-memory 47 5. Compression 50 5.1 Reiterative patterns 50 5.2 Compression in one process 55 5.3 Compression between multiple processes 58 6. Implementation and Experimental Results 63 7. Conclusion and Future work 76 APPENDIX A : How to generate race variant 78 REFERENCES 81

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