C + + code coverage generation

There is only one source code file in the initial state

[Email protected]:testcov> lstest.c[email Protected]:testcov>

The first step: compiling, linking, executing the executable file

Gcc-o a-coverage Test.c-lgcov &&. A

The required record file (*.GCDA,*.GCNO) is generated

[Email protected]:testcov> LSA  test.c  test.gcda  test.gcno[email protected]:testcov>

Step two: Analyze the target file

[Email protected]:testcov>'test.c'Lines executed:100.00  -  'test.c.gcov'[email protected]:testcov>

This will generate *.gcov files, which may have more than one of the files we only need to open the Gcov file corresponding to the target file.

[Email protected]:testcov> vim Test.c.gcov

The results are as follows

-:0: source:test.c-:0: Graph:test.gcno-:0:D ATA:TEST.GCDA-:0: Runs:1-:0:P Rograms:1-:1: #include <stdio.h>-:2:        -:3:Charvisit[Wuyi]; -:4:intans[Wuyi]; -:5:intN; -:6:intcnt[ One]; -:7:    #####:    8:voidForemptycheck ()-:9:{    #####:   Ten: Puts (" Here"); #####:    One:}        -: A:        -: -:intSum ()-: -:{        -: the:intI, j, Sum =0;  -: -: for(i =0; i < N; ++i) { the: -:intMin =Ans[i]; 336: -: for(j = i; j < N; + +)j) { -: +:if(Ans[j] <min) {        -: -: Min =Ans[j]; -: +:            }        -: A:        }        the: at: Sum + =min; -: -:    }        -: -:    ++Cnt[sum];  -: -:returnSum; -: -:}        -: -:        -: in:voidDFS (intSintCNT)-: -:{        -: to:inti;  -: +:Charover =1;  -: -: visit[s] =1;  -: the: ans[cnt] = s +1;  the: *: for(i =0; i < N; ++i) { the: $:if(!Visit[i]) {        -:Panax Notoginseng: over =0;  -: -: DFS (i, CNT +1);  -: the: visit[i] =0; -: +:        }        -: A:    }        -: the:if(over) { -: +: for(i =0; i < N; ++i) { the: -: printf ("%d", Ans[i]); -: $:        }        -: $: printf ("\t%d\n", Sum ()); -: -:    }        -: -:}        -: the:        1: -:intMain ()-:Wuyi:{        -: the:inti; 1: -: N =4; 5: Wu: for(i =0; i < N; ++i) {4: -: DFS (I,0); 4: About: visit[i] =0; -: $:    }        8: -: for(i=4; i<=Ten; ++i)-: -:    {        7: -: printf ("%d", Cnt[i]); -: A:    }        1: +: Puts (""); 1: the:return 0; -: -:}

where Foremptycheck () is preceded by the word "#####" of the token string, indicating that the function has not been called;

Sum () preceded by a labeled number "24", indicating that the function was called 24 times, just corresponding to the 4!=24

C + + code coverage generation