GCOV+LCOV 代码调试和覆盖率统计工具

AderXCoding/system/tools/gdb/gcov

1 GCOV介绍

2 GCOV使用方法

gcov

Linux

GCC

C/C++

gcov

.gocv

.gcov

-

#####

profiling

gcov

GCOV PREFIX

GCOV PREFIX STRIP

/user/build/foo.o

/user/build/foo.gcda

/target/run/build/foo.gcda

gcda

gcov

gcc

g++

-fprofile-arcs -ftest-coverage

-fprofile-arcs -ftest-coverage

Makefile

CFLAGS

LDFLAGS

undefined reference to '__gcov_init'

-lgocv

gcda

*.gcda

gcov

.gcov

gcov *.c

gcov *.cpp

*.cpp

*.c

*.gcda

*.c.gcov

*.cpp.gcov

lcov

info

*.gcov

linux

lcov

lcov -d . -t '表格名称' -o '文件名称.info' -b . -c

gethtml

html

info

html

genhtml -o 输出目录名 文件名.info

html

index

3 示例

3.1 示例程序

test.c

main.c

gcov

gcc

2

-fprofile-arcs -ftest-coverage

// test.c
#include <stdio.h>

void test(int count)
{
int i;
for (i = 1; i < count; i++)
{
if (i % 3 == 0)
printf ("%d is divisible by 3\n", i);
if (i % 11 == 0)
printf ("%d is divisible by 11\n", i);
if (i % 13 == 0)
printf ("%d is divisible by 13\n", i);
}
}

// main.c
#include <stdio.h>
#include <stdlib.h>

void test(int vount);

int main(int argc, char *argv[])
{
int i = 0;
if(argc == 2)
i = atoi(argv[1]);
else
i = 10;

printf("arg is %d\n", i);

test(i);

return EXIT_SUCCESS;
}

// Makefile
GCOV_FLAGS=-fprofile-arcs -ftest-coverage
CFLAGS+=$(GCOV_FLAGS)
LDFLAGS+=-lpthread $(GCOV_FLAGS)

target=main

all:$(target)

main : test.o main.o
$(CC) $(CFLAGS) $^ -o $@ $(LDFLAGS)
@echo "gdb-gcov测试程序覆盖率..."

%.o : %.c
$(CC) -g -c $^ -o $@  $(CFLAGS) $(DEFINES)

.PHONY : clean
clean :
rm -rf *.o
rm -rf $(target)
rm -rf  *.gcov *.gcda *.gcno

3.2 编译程序

main

C

*.gcno

gcc

"-ftest-coverage"

*.gcno

3.3 运行程序

main

./main

main.gcda

"-fprofile-arcs"

3.4 GCOV 生成代码覆盖数据

gcov

gcov main.c
gcov test.c

#####

lcov

html

3.5

lcov

生成

info

数据

lcov

main_test.info

main_test.info

1genhtml

genhtml

lcov

3.6 生成

html

数据

genhtml -o result main_test.info

result

html

web server

4 参考