Re: [gdbserver/win32] (4/11) New interrupting method

[Lerele <lerele at champenstudios dot com>]

Pedro Alves escribió:
> Hi,
>
> Here is the new method to stop the inferior, based on a mix of
> Leo's and mine patches.  The idea is simple.  Loop through all
> the inferior threads suspending them.
>
> This version doesn't contain the gdbserver priority handling,
> which means that there is a higher chance of the inferior
> breaking the method, since the operation is not atomic.  For
> example by tweaking its own thread's priorities or if the
> inferior is calling ResumeThread in its own threads while
> gdbserver is stopping them.
>
> The next patch will minimize those chances, by elevating
> gdbserver's priority while stopping the inferior with
> this method.
>
> Leo, did I miss anything?
>
> Regtested on a local i686-pc-cygwin gdbserver.
>
> Cheers,
> Pedro Alves
I think this patch breaks interrupt functionality.
The function suspend_one_thread in the new patch does not seem to 
retreive the thread context and sets the thread suspend count to 1, so 
the next call to thread_rec that should happen in gdbserver will get 
incorrect thread context.

My interrupt patch I sent initially used thread_rec to pause the child 
threads, so get context should work here.
I think it's more correct anyway to use thread_rec everywhere so that 
SuspendThread is centralized in one unique function.

Is this correct, or is there something I may have slipped reading your 
patch?

Leo.