Bcov coverage rate statistics

Kcov is implemented on the basis of bcov, which has not been maintained for a long time;

First, download the dependent library libdwraft and specify it in configure:

./Configure -- With-libdwarf =/usr/local/lib

Then make; make install

(1) Sadly, errors occurred during compilation.

'Ptrace _ o_traceclone 'was not declared in this scope

Add a header file <sys/ptrace>

At the same time, the place where ptrace is called is forced type conversion, for example, the original is

Ptrace (ptrace_getregs, activechild, 0, & regs );

Then change

Ptrace (_ ptrace_request) ptrace_getregs, activechild, 0, & regs );

Compilation is successful;

(2) You can use it after installation. You need to add the-G parameter to the source program compilation; otherwise, no information is collected.

g++ t.cpp -O0 -g

 

Use bcov to start the program:

bcov ./a.out  & 

　　

Startup will display

probing debug information...found active lines in 1 source filesset 11 breakpoints

Then killall

killall -9 a.out 

Display

program terminatedcoverage info written to .bcovdump

　　

In this case, the coverage file. bcovdump is generated

bcov-report ./.bcovdump ~/httpd/htdocs/bcov-report.DhblLi

View:

 

 

Statistical analysis of service-type test coverage compared with gcov

(1) bcov does not need to add compilation parameters and connection parameters, but needs to add the-G option;

(2) gcov needs to set environment variables during startup, while bcov needs to use the bcov command to start the program under test;

(3) Merge multiple files. We can see that the bcov output file is. bcovdump is a bunch of numbers and it seems easier to edit.: