内存检测工具Valgrind

内存检测工具Valgrind
Valgrind可以检测如下的内存问题：
1，使用未初始化的内存；
2，使用已经释放的内存；
3，使用超过malloc分配的内存空间；
4，对堆栈的非法访问；
5，内存泄露；
6，mallock/free/new/delete非匹配的使用内存申请和释放函数；
7，使用memcpy等函数源地址和目的地址重叠错误。
选项看这里：


举个例子：
//example1.c

int main(void) {
    int i[3];
    if(i[0] == 1)
        i[1] = 0;
    return 0;
}

编译后
[xchunhua@localhost Exp]$ valgrind --tool=memcheck --leak-check=yes --show-reachable=yes ./example1

==3099== Memcheck, a memory error detector.
==3099== Copyright (C) 2002-2007, and GNU GPL'd, by Julian Seward et al.
==3099== Using LibVEX rev 1732, a library for dynamic binary translation.
==3099== Copyright (C) 2004-2007, and GNU GPL'd, by OpenWorks LLP.
==3099== Using valgrind-3.2.3, a dynamic binary instrumentation framework.
==3099== Copyright (C) 2000-2007, and GNU GPL'd, by Julian Seward et al.
==3099== For more details, rerun with: -v
==3099==
==3099==
==3099== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 12 from 1)
==3099== malloc/free: in use at exit: 0 bytes in 0 blocks.
==3099== malloc/free: 0 allocs, 0 frees, 0 bytes allocated.
==3099== For counts of detected errors, rerun with: -v
==3099== All heap blocks were freed -- no leaks are possible.