[Crash-utility] finding information about threads

[Dave Anderson]

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?
>
> 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

I'll whip up a "ps -g" option for the next release, whlch will look
like "ps -c" in that, for each task whose pid equals its tgid, will
then list its threads indented underneath.

(BTW, I've implemented your previous suggestion for a ps
option to dump the full command line and all of a task's
environment variable dumps as well...)

Thanks,
  Dave

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