Lcov for Linux Use

Source: Internet
Author: User
Tags gcov

  1. First install Lcov, I install the version is lcov-1.9

  2. write a app.c file with the following code:

    #include <stdio.h>
    # Include <time.h>
    #include <stdlib.h>
    Void Main ()
    {
     int a=3;
     int b=4;
     int c=5;

     if (a>b&&a>c)//Determine if A is the maximum
     {
      if (b>c)
      {
       printf ("A>b>c");
     }else
      {
       printf ("a>c>b");
     
     }
     else if (b>a&&b>c)//Determine if B is the maximum
     {
       if (a>c)
      {
       printf ("b>a>c");
     }else
      {
       printf ("B>c>a");
     
     }
     else if (c>b&&c>a)//Determine if C is the maximum
     {
       if (a>b)
      {
       printf ("c>a>b");
     }else
      {
       printf ("C>b>a");
     
     }
    }

  3. [Email protected] test]# Gcc-fprofile-arcs-ftest-coverage-o MYAPPAA app.c

  4. [Email protected] test]#./myapp

  5. [Email protected] test]# Gcov app.c
    File ' app.c '
    Lines executed:58.82% of 17
    App.c:creating ' App.c.gcov '

  6. [[email protected] test]# ls
    App.c App.c.gcov app.gcda app.gcno MyApp

  7. [Email protected] test]# lcov-d./-O Myapp.info-b. -C
    Capturing coverage data from./
    Found Gcov version:4.4.7
    Scanning./For. gcda files ...
    Found 1 data files in./
    Processing APP.GCDA
    Finished. Info-file Creation

  8. [[email protected] test]# ls
    App.c app.gcda app.gcno MyApp myapp.info

  9. [Email protected] test]# Genhtml-o Myapp_restul myapp.info
    Reading Data File Myapp.info
    Found 1 entries.
    Found common filename prefix "/opt"
    Writing. css and. png files.
    Generating output.
    Processing file zhaogh/test/app.c
    Writing Directory View page.
    Overall Coverage Rate:
    Lines ...: 58.8% (ten of lines)
    Functions.: 100.0% (1 of 1 function)
    Branches ...: 33.3% (6 of branches)

  10. SZ Myapp_restul

  11. Then open index to see the coverage of code execution

  12. 650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6F/25/wKioL1WTTwmQpUaZAARDsYBm_gM973.jpg "title=" Lcov.png "alt=" Wkiol1wttwmqpuazaardsybm_gm973.jpg "/>

This article is from the "bad-kbase" blog, make sure to keep this source http://bad51men.blog.51cto.com/3141086/1669649

Lcov for Linux Use

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