Hardware watchpoint for read

[Luis Gustavo]

Hi,

On 04/24/2012 10:02 AM, Xin Tong wrote:
> Hello
>
> I am wondering that can gdb insert hardware watch point for read to
> the watched memory ? can other debugger do that ? is it supported in
> hardware watchpoint ?
>
> Thanks
>
> Xin
>

Read watchpoints are hard to implement as soft-watchpoints, so they're 
usually implemented as hardware watchpoints.

If a debugger knows how to properly set the bits in the hardware, either 
through ptrace or other means, it can configure a read/write/read-write 
watchpoint. Depends on hardware support really.

Regards,
Luis