强制将内存分配始终分配给相同的虚拟地址 [英] Force memory allocation always to the same virtual address

问题描述

我正在尝试使用一种检测工具 Pin 根据我的变量的内存地址来计算一些统计信息.我想用我的检测工具收集的信息重新运行程序，但是对于虚拟内存地址，通过不同的运行保持相同至关重要.

I'm experimenting with Pin, an instrumentation tool, which I use to compute some statistics based on memory address of my variables. I want to re-run my program with the information gathered by my instrumentation tool, but for that it's crucial that virtual memory addresses remain the same through different runs.

通常，我应该让操作系统处理内存分配，但是在这种情况下，我需要某种方式来强制它始终分配给相同的虚拟地址.特别是，我对一个很长的数组感兴趣，尽管我可以使用其他数组，但我目前正在使用numa_alloc_onnode()进行分配.

In general, I should let the OS handle memory allocation, but in this case I need some kind of way to force it to always allocate to the same virtual address. In particular, I'm interested in a very long array, which I'm currently allocating with numa_alloc_onnode(), though I could use something else.

正确的进行方式是什么?

What would be the correct way to proceed?

谢谢

推荐答案

您可以尝试mmap(2).

You could try mmap(2).

程序的检测版本将使用与原始程序不同的内存布局，因为引脚需要用于动态翻译的内存等，并且会更改内存布局. (如果我没记错的话)

The instrumented version of your program will use a different memory layout than the original program because pin needs memory for the dynamic translation etc. and will change the memory layout. (if I recall correctly)

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