[Crash-utility] finding information about threads

[Ananth N Mavinakayanahalli]

On Fri, Sep 29, 2006 at 01:39:49PM -0400, Dave Anderson wrote:
> Guy Streeter wrote:
> 
> > How can I find out what other tasks are threads of (or with) a given
> > task?
> >
> > --Guy
> 
> There's no direct command to do it.  But, for example,
> all threads of a task should have the same name and the
> same task->tgid right?

All threads of a process will be in the task_struct->thread_group list
of the process' group_leader. Wouldn't that be easier/faster to do?

Ananth

> 
> So for example, I just executed a task named "mkthreads", pid 27610,
> which in turn creates 10 threads of itself, all of which will have
> the same task->tgid:
> 
> crash> foreach mkthreads task | grep -e COMMAND -e tgid
> PID: 27610  TASK: ddb2c000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27611  TASK: c82de000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27612  TASK: d016a000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27613  TASK: c3f2e000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27614  TASK: db95e000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27615  TASK: d6dfa000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27616  TASK: ddad6000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27617  TASK: cd1a4000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27618  TASK: d45de000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27619  TASK: cef58000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> PID: 27620  TASK: cdc38000  CPU: 0   COMMAND: "mkthreads"
>   tgid = 27610,
> crash>
> 
> Dave
> 

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