编程珠玑-续1 Pearls C/C++性能监测工具

参考

1. gprof、gprof2dot.py、dot使用方法简介
   

   

2. gcov、lcov与genhtml 使用心得

3. Linux平台代码覆盖率测试工具GCOV的前端工具LCOV简介
   

   

4. NetBeans C/C++远程开发环境

   
   

makefile文件留记

文件及目录

$ ls
descriptions.txt  Makefile  methods  p1.c  prime.h  README
$ls methods/
prime.c

Makefile 根据3. Linux平台代码覆盖率测试工具GCOV的前端工具LCOV简介 中lcov自带例子中的makefile修改。

p4.c

#include<stdio.h>
#include<math.h>
int root (int n)
{
  return (int) sqrt ((float) n);
}
int prime (int n)
{
  int i, bound;
  if (n % 2 == 0)
    return (n == 2);
  if (n % 3 == 0)
    return (n == 3);
  if (n % 5 == 0)
    return (n == 5);
  if (n % 7 == 0)
    return (n == 7);
  if (n % 11 == 0)
    return (n == 11);
  bound = root (n);
  for (i = 13; i <= bound; i=i+2)
    if (n % i == 0)
      return 0;
  return 1;
}
int main (int argc, char *argv[])
{
  int i, n;
  if (argc == 2)
    {
      n = atoi (argv[1]);
    }
  for (i = 2; i <= n; i++)
    if (prime (i))
      printf ("%d\n", i);
  return 0;
}

根据安装的lcov调整LCOV := /usr/bin/lcov，GENHTML := /usr/bin/genhtml，GENDESC := /usr/bin/gendesc
GENPNG := /usr/bin/genpng

#
# Makefile for the LCOV p4 program.
#
# Make targets:
#   - p4: compile the p4 program
#   - output:  run test cases on p4 program and create HTML output
#   - clean:   clean up directory
#

CC      := gcc
CFLAGS  := -Wall -I. -fprofile-arcs -ftest-coverage

LCOV    := /usr/bin/lcov
GENHTML := /usr/bin/genhtml
GENDESC := /usr/bin/gendesc
GENPNG  := /usr/bin/genpng

# Depending on the presence of the GD.pm perl module, we can use the
# special option '--frames' for genhtml
USE_GENPNG := $(shell $(GENPNG) --help >/dev/null 2>/dev/null; echo $$?)

ifeq ($(USE_GENPNG),0)
  FRAMES := --frames
else
  FRAMES :=
endif

.PHONY: clean output test_1000

all: output

p4: p4.o
    $(CC) p4.o -o p4 -lgcov -lm

p4.o: p4.c
    $(CC) $(CFLAGS) -c p4.c -o p4.o

output: p4 descriptions test_1000
    @echo
    @echo '*'
    @echo '* Generating HTML output'
    @echo '*'
    @echo
    $(GENHTML) trace_args.info \
           --output-directory output --title "Basic p4" \
           --show-details --description-file descriptions $(FRAMES) \
           --legend
    @echo
    @echo '*'
    @echo '* See '`pwd`/output/index.html
    @echo '*'
    @echo

descriptions: descriptions.txt
    $(GENDESC) descriptions.txt -o descriptions

all_tests: test_1000

test_1000:
    @echo '*'
    @echo '* Test case 1: running ./p4 100'
    @echo '*'
    @echo
    $(LCOV) --zerocounters --directory .
    ./p4 1000
    $(LCOV) --capture --directory . --output-file trace_args.info --test-nam
e "test_1000" --no-externalclean:
    rm -rf *.o *.bb *.bbg *.da *.gcno *.gcda *.info output p4 \
    descriptions