[llvm-dev] how to monitor read operation to special memory blocks?

[慕冬亮 via llvm-dev]

In LLVM, is there any way to monitor read operation to some special blocks?
For example, I have a memory block from A1 to A2 to protect. Any read
operation to the address between A1 and A2 will be caught.
And I can return other values, not true values to them or just report
errors about this read operation.

    - mudongliang