Re: [ECOS] gdb - info thread

[Gary Thomas <gary at mlbassoc dot com>]

On Thu, 2004-06-10 at 13:28, Phungte-Ha wrote:
> Hello all,
> 
> I am running  twothreads.c on a ppc405 platform, which has redboot
> compiled with gdb multi-thread debug. The application is loaded using gdb,
> connected by serial line.
> 
> Everything seems to work fine, but I wonder about info thread.
> I changed twothreads.c, added a 3rd thread to it, and info thread command
> invariably returns:
> 
> (gdb) info thread
>   2 Thread 2 ( Name: main, State: ready, Priority: 10 )  0xfffeadf0 in ?? ()
> * 1 Thread 1 ( Name: Idle Thread, State: running, Priority: 31 )  simple_program_2 (
>     data=4) at twothreads.c:122
> (gdb) 
> 
> The 3 threads started fine as stated by the printf from the application:
> [New Thread 1]
> 0xfffee85c in ?? ()
> $1 = 0x17400
> Entering twothreads' cyg_user_start() function
> resuming threads
> Beginning execution; thread data is 0
> Beginning execution; thread data is 1
> Beginning execution; thread data is 2
> Thread 0: and now a delay of 100 clock ticks
> Thread 1: and now a delay of 100 clock ticks
> Thread 2: and now a delay of 100 clock ticks
> Thread 0: and now a delay of 100 clock ticks
> Thread 1: and now a delay of 100 clock ticks
> Thread 2: and now a delay of 100 clock ticks
> 
> 
> The questions are:
>     . is the info thread command printing out the thread information of
>     redboot rather than the one from twothreads?
>     . is it possible to get real twothreads' thread information (the list would
>     have at least 3 threads then) while running the application this way
>     (application running ontop of redboot, instead of gdb stub)?
> 
> Thanks a lot for your ideas.

The 'info threads' command only tells you about the threads that exist
at the time of the command (since threads in eCos are totally dynamic).
I think that if you set a breakpoint somewhere in your program, *after*
the three threads have been created, it would tell you something quite
different than what you show.

-- 
Gary Thomas <gary@mlbassoc.com>
MLB Associates


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