Re: [Valgrind-developers] thread-change callback

[Nicholas N. <nj...@cs...>]

On Thu, 21 Feb 2008, Bart Van Assche wrote:

> On Thu, Feb 21, 2008 at 6:38 PM, Vince Weaver <vi...@cs...> wrote:
>>  To do this properly, it would be nice if it were possible to be notified
>>  whenever a thread-change happened.  That way the statistics from the
>>  various threads could be kept separately.
>
> This would be useful for exp-drd too. What I do now is to compare the
> result of VG_(get_running_tid)() with a cached value in order to
> detect when Valgrind scheduled another thread. This test is performed
> upon every load, every store, and every time the stack pointer is
> modified.

I thought we had such an event -- I thought Josef used it in Callgrind.
In include/pub_tool_tooliface.h I see:

track_start_client_code
track_stop_client_code
track_pre_thread_ll_create
track_pre_thread_ll_create
track_pre_thread_ll_exit

Are any of these good enough?  (I really thought we had a 
track_thread_switch event...)

Nick