Which threads execute _Thread_Handler ?

[Richi Dubey]

Also,

The stack trace for the thread looks like this:

Tasks (entry function) -> rtems_task_wake_after ->_Thread_Dispatch_direct
-> _Thread_Do_dispatch (where the _Context_switch function call lies), how
can then the heir thread start executing from the _Thread_Handler? I do not
see it in the trace at all.



On Sat, Dec 5, 2020 at 11:05 AM Richi Dubey <richidubey at gmail.com> wrote:

> I have currently no time to help you debugging this issue.
>
> Okay, even a hint would be helpful.
>
> returns to _Thread_Do_dispatch() or jumps to _Thread_Handler().
>
> When does it return to  _Thread_Do_dispatch() and when does it jump to
> _Thread_Handler() ? Is there a condition? How does it choose between what
> to do?
>
>
> On Fri, Dec 4, 2020 at 1:35 PM Sebastian Huber <
> sebastian.huber at embedded-brains.de> wrote:
>
>> On 04/12/2020 08:56, Richi Dubey wrote:
>>
>> >
>> > When I am trying to debug tm24 running on the Strong APA scheduler
>> > code, I can see that the thread which comes after the call
>> > to _CPU_Context_switch, resumes execution from the same code (next
>> > line in the _Thread_Do_dispatch function after _CPU_Context_switch),
>> > whereas when the same code is run on a different scheduler (the
>> > default sp scheduler) the heir thread that executes after the call
>> > to _CPU_Context_switch starts executing from  _Thread_Handler and does
>> > not resume its execution from the _Thread_Do_dispatch (which has the
>> > context_switch function call).
>> >
>> > Why is this happening? Is the scheduler responsible for this?
>>
>> I have currently no time to help you debugging this issue.
>>
>> Each thread starts the execution in _Thread_Handler(). A context switch
>> returns to _Thread_Do_dispatch() or jumps to _Thread_Handler(). The
>> _Thread_Handler() completes the context switch, does some general calls
>> to begin the thread execution and then calls the thread entry function.
>>
>> --
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