关于C++ code coverage tool 的研究（1)

http://www.taobaotesting.com/blogs/qa?bid=8447

实习快两个月了，发些研究成果与总结。关于覆盖测试的基本概念可以上网查阅，这里直接从研究对比开始讲吧。因为内容太多，开始之前先给个目录：

（1）覆盖测试工具的简要对比

（2）LINUX下工具GCOV的实现原理

（3）LINUX下工具GCOV的使用说明

(4 ) WINDOWS下工具coverage validator原理与使用说明

（5）修改GCOV适用于分布式测试覆盖率统计原理与方法

下面是部分C++ code coverage tool 的一个粗略的对比表格。这里重点研究了GCOV,COVTOOL,coverage validator，后续有时间的话，会针对旺旺重点研究下XCOVER. 有些工具没有具体研究，有兴趣的话，可以查看相应链接。

	Free orcommercial	Platform/complier	Coverage level	Show Execute counters	Easy to use	output	Useable in large	implement	others
gcov	Free	Linux ,only gcc	Decision coverage	Yes	yes	HTML report	No	Instrument as compiling	nonsupport shared library
COVTOOL	Free	linux	Line	boolean	no	Merge.db, ASCII report	yes	Instrument as compiling	Nonsupport thread
xcover	Free	platform-independent library, gcc4.3+	Line coverage	Yes	no	HTML report	?	Source file only,denpend on stlsoft	Written in c
GCT	Free	Unix,linux,Only for c	Branch/condition	no	yes	No HTML	yes	Instrument as compiling	Only for c,work well with if,case,for
Coverage validator	Commercial	Windows	decision	yes	yes	HTML,XML,	yes	No recompile,With pdb file	Powerful filters,do not affect performance
BullseyeCoverage	Commercial	Windows,unix,	Branch/condition	no	yes	Csv report,Easy to change to perl	yes	hook	Work well with vc,cppunit
Pure coverage	Commercial	Unix,windows	decision	yes	yes	HTML,XML,	yes	Object Code Insertion	Work well with Purify

其他可以参考：Testwell CTC++, CoverageMeter,Dynamic Code Coverage, TCAT C/C++,


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