- 下载
http://valgrind.org/downloads/current.html
- 解压
- 编译
./configure
make
sudo make install- 测试
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char **argv)
{
//char array[32] = {0};
char* buffer = NULL;
buffer = (char*)malloc(32);
//崩溃
buffer[56] = 0;
free(buffer);
return 0;
}编译运行
gcc -g test.c
valgrind --tool=memcheck --leak-check=full ./a.out显示如下：
==13794== Memcheck, a memory error detector
==13794== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==13794== Using Valgrind-3.14.0 and LibVEX; rerun with -h for copyright info
==13794== Command: ./a.out
==13794==
==13794== Invalid write of size 1
==13794== at 0x400593: main (test.c:11)
==13794== Address 0x5205078 is 24 bytes after a block of size 32 in arena "client"
==13794==
==13794==
==13794== HEAP SUMMARY:
==13794== in use at exit: 0 bytes in 0 blocks
==13794== total heap usage: 1 allocs, 1 frees, 32 bytes allocated
==13794==
==13794== All heap blocks were freed -- no leaks are possible
==13794==
==13794== For counts of detected and suppressed errors, rerun with: -v
==13794== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
注意其中：
==13794== Invalid write of size 1
==13794== at 0x400593: main (test.c:11)
- 实用性探讨
需要说明的是，对于类似char array[32] = {0};，提示上就要差一些
==13772== Invalid read of size 1
==13772== at 0x4E5B800: (below main) (libc-start.c:285)
==13772== Address 0x0 is not stack'd, malloc'd or (recently) free'd
具体情况，以后通过试用再做补充．
