Re: Why does "target remote" to a non-stop target stop one thread

[Luis Machado <lgustavo@codesourcery.com>]

On 06/28/2013 10:06 AM, Jeremy Bennett wrote:
> On 28/06/13 10:14, Yao Qi wrote:
>> On 06/28/2013 04:38 AM, Jeremy Bennett wrote:
>>> hen I connect to the target, even in non-stop mode, it insists on
>>> stopping one thread. The comment in notice_new_inferior () is:
>>>
>>>>>        /* We're going to install breakpoints, and poke at memory,
>>>>>      ensure that the inferior is stopped for a moment while we do
>>>>>      that.  */
>>> My question is, why we need to stop any thread. Surely the whole point
>>> of non-stop mode is that we don't generally want to stop any threads if
>>> it can be avoided.
>>
>> Hi Jeremy,
>> AFAIK, "non-stop" means when GDB is examining one stopped thread while
>> other threads are _not stopped_.
>>
>> See
>> http://sourceware.org/gdb/onlinedocs/gdb/Non_002dStop-Mode.html#Non_002dStop-Mode
>>
>>
>> GDB needs the thread stopped because ptrace can't be performed on the
>> running thread.
>>
> Hi Yao,
>
> Thanks for the explanation. Since I am working on a RTOS that does not
> use ptrace, and can perform actions on running threads, I don't need to
> stop. So it looks like something like the patch suggested by Raphael
> Zulliger that makes this configurable depending on the target would be a
> useful.
>
> I'll work on this.
>
>
> Jeremy
>

Does "set may-interrupt off" help any?

Luis