我可以在 C++ 中使用指针分配特定的内存地址吗?

2021-12-13 00:00:00 memory pointers c++

我可以在 C++ 中使用指针分配特定的内存地址吗?

Can I Allocate a specitic memory address using pointers in c++ ?

例如:分配这个内存地址25D4C3FA，并在里面放4.

For example: Allocate This memory address 25D4C3FA and put 4 in it.

推荐答案

在进程的地址空间中分配一个特定的地址是一个有点棘手且特定于平台的问题.在 Unix 系统上，mmap() 可能是您将要得到的最接近的值.Windows 等效项是 VirtualAlloc().当然，由于地址可能已被使用，因此无法保证.

Allocating a specific address in your process's address space is a bit tricky and platform-specific. On Unix systems, mmap() is probably the closest you're going to get. The Windows equivalent is VirtualAlloc(). There are, of course, no guarantees since the address might already be in use.

写入到特定地址很简单:

char *p = (char*)0x25D4C3FA;
*p = 4;

我认为您有充分的理由想要这样做.

I assume you have good reasons to want to do that.

相关文章