1、安裝mtrace工具
centos ： sudo yum install glibc-utils
2、mtrace工具使用

/*************************************************************************
 > File Name: mtrace.c
 > Author:  jinshaohui
 > Mail:    [email protected]
 > Time:    18-11-07
 > Desc:
 ************************************************************************/
#include<assert.h>

#include<string.h>
#include<stdlib.h>
#include<stdio.h>
#include<mcheck.h>


int main()
{
        int *p = NULL;
        setenv("MALLOC_TRACE","1.log",1);
        mtrace();
        p = malloc(100);
        muntrace();
        return;
}
 

編譯的時候需要加-g

[[email protected] work]$ gcc -g mtrace.c
[[email protected] work]$
[[email protected] work]$ ./a.out
[[email protected] work]$ mtrace a.out 1.log

Memory not freed:
-----------------
   Address     Size     Caller
0x0904c428     0x64  at /home/jsh/workspace/Linux-C-C--learning/C/work/mtrace.c:21
 

很容易看出23行存在記憶體洩漏。