Question

我试图在C ++中挂钩new / delete 说到malloc / free，很简单：只需阅读： http://www.gnu.org/software/libc/manual/html_node/Hooks-for-Malloc.html

但是，使用new / delete在C ++中进行分配呢？

P.S。我的意思是G ++ / GCC

Answer 1

这很简单，只需重载new / new [] / delete / delete []函数：

void* operator new(size_t size)
void* operator new[](size_t size)
void  operator delete(void* ptr)
void  operator delete[](void* ptr)

参见Overloading Global operator new and delete 有关默认新/删除功能的详细信息，请参阅here

Answer 2

仅全局重载new和delete运算符。我在下面写了一个简单的例子。

void * operator new(size_t size){
    int *p=(int*)malloc(size);
    cout<<*p<<" "<<p<<endl;
    return p;
}
void operator delete(void *p)
{   free(p);
}
void * operator new[](size_t size){
    void *p=malloc(size);
    return p;
}
void operator delete[](void *p){
     free(p);
}

挂钩新/删除C ++

2 个答案: