Issue created by Chris Johns:
https://gitlab.rtems.org/rtems/rtos/rtems/-/work_items/5640
Assignee: Chris Johns
## Summary
Print the TCB or `Thread_Control` pointer in the thread extra info query
output. This is shown when you enter `info thread` at a GDB prompt.
The TCB is useful then inspecting objects that contain the TCB pointer. For
example:
```
(gdb) p *__mutex
$4 = {
_Queue = {
_Lock = {
_next_ticket = 7632,
_now_serving = 7632
},
_heads = 0x7f49308,
_owner = 0x7f44668,
_name = 0x0
}
}
(gdb) p __mutex->_Queue._owner
$5 = (_Thread_Control *) 0x7f44668
```
The `__mutex->_Queue._owner` field is the TCB and if the `info thread` command
shows the TCB for a thread you can see which it is without the need to dump
other thread specific details.
--
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/work_items/5640
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