LCOV - the LTP GCOV extension

LCOV - the LTP GCOV extension
gcov—a Test Coverage Program

// -- $ mkdir src; vim src/hello.c --
#include <stdio.h>

int main (void)
{
  int i, total;

  total = 0;

  for (i = 0; i < 10; i++)
    total += i;

  if (total != 45)
    printf ("Failure\n");
  else
    printf ("Success\n");
  return 0;
}

// -- makefile --
all: results/index.html
	firefox results/index.html

results/index.html: hello.info
	genhtml -o results hello.info

hello.info: hello.c.gcov
	lcov --directory . --capture --output-file hello.info

hello.c.gcov: hello.gcda
	gcov ./src/hello.c
	cat hello.c.gcov

hello.gcda: hello
	./hello

hello: src/hello.c
	gcc -fprofile-arcs -ftest-coverage -o hello ./src/hello.c

clean:
	rm -f hello*
	rm -rf results/

//-- make --
$ make all
gcc -fprofile-arcs -ftest-coverage -o hello ./src/hello.c
./hello
Success
gcov ./src/hello.c
File './src/hello.c'
Lines executed:87.50% of 8
./src/hello.c:creating 'hello.c.gcov'

cat hello.c.gcov
        -:    0:Source:./src/hello.c
        -:    0:Graph:hello.gcno
        -:    0:Data:hello.gcda
        -:    0:Runs:1
        -:    0:Programs:1
        -:    1:#include 
        -:    2:
        -:    3:int main (void)
        1:    4:{
        -:    5:  int i, total;
        -:    6:
        1:    7:  total = 0;
        -:    8:
       11:    9:  for (i = 0; i < 10; i++)
       10:   10:    total += i;
        -:   11:
        1:   12:  if (total != 45)
    #####:   13:    printf ("Failure\n");
        -:   14:  else
        1:   15:    printf ("Success\n");
        1:   16:  return 0;
        -:   17:}
        -:   18:
lcov --directory . --capture --output-file hello.info
Capturing coverage data from .
Found gcov version: 4.3.3
Scanning . for .gcda files ...
Found 1 data files in .
Processing ./hello.gcda
Finished .info-file creation
genhtml -o results hello.info
Reading data file hello.info
Found 1 entries.
Found common filename prefix "/home/solomon"
Writing .css and .png files.
Generating output.
Processing file c2/src/hello.c
Writing directory view page.
Overall coverage rate: 7 of 8 lines (87.5%)
firefox results/index.html