YuuichiNakamura opened a new pull request #2142:
URL: https://github.com/apache/incubator-nuttx/pull/2142
## Summary
Currently, trace dump can show the task name of only newly created task
because only `struct note_start_s` has the task name information.
This PR adds the interface to record the task name corresponding to the
given pid which is used while instrumentation.
By this extension, trace dump command can show all task names.
Before:
```
<noname>-3 [0] 2.300000000: sys_sched_unlock()
<noname>-3 [0] 2.300000000: sys_sched_unlock -> 0x0
<noname>-3 [0] 2.300000000: sys_nxsched_get_streams()
<noname>-3 [0] 2.300000000: sys_nxsched_get_streams -> 0xd029edc
<noname>-3 [0] 2.300000000: sys_ioctl(arg0: 0x1, arg1: 0x118, arg2: 0x5)
<noname>-3 [0] 2.300000000: sys_ioctl -> 0xffffffff
<noname>-3 [0] 2.300000000: sys_waitpid(arg0: 0x5, arg1: 0xd02a6e4,
arg2: 0x4)
<noname>-3 [0] 2.300000000: sched_switch: prev_comm=<noname> prev_pid=3
prev_state=S ==> next_comm=trace next_pid=5
trace-5 [0] 2.300000000: irq_handler_entry: irq=11
trace-5 [0] 2.300000000: irq_handler_exit: irq=11
trace-5 [0] 2.300000000: sys_open(arg0: 0xd01aa0c, arg1: 0x0, arg2:
0x1)
trace-5 [0] 2.300000000: sys_open -> 0x3
trace-5 [0] 2.300000000: sys_nxsched_get_streams()
trace-5 [0] 2.300000000: sys_nxsched_get_streams -> 0xd02bfcc
trace-5 [0] 2.300000000: sys_ioctl(arg0: 0x3, arg1: 0x2c01, arg2:
0xd02c888)
trace-5 [0] 2.300000000: sys_ioctl -> 0x0
trace-5 [0] 2.300000000: sys_ioctl(arg0: 0x3, arg1: 0x2c02, arg2:
0xd02c888)
```
After:
```
init-3 [0] 1.660000000: sys_sched_unlock -> 0x0
init-3 [0] 1.660000000: sys_nxsched_get_streams()
init-3 [0] 1.660000000: sys_nxsched_get_streams -> 0xd029edc
init-3 [0] 1.660000000: sys_ioctl(arg0: 0x1, arg1: 0x118, arg2: 0x5)
init-3 [0] 1.660000000: sys_ioctl -> 0xffffffff
init-3 [0] 1.660000000: sys_waitpid(arg0: 0x5, arg1: 0xd02a6e4,
arg2: 0x4)
init-3 [0] 1.660000000: sched_switch: prev_comm=init prev_pid=3
prev_state=S ==> next_comm=trace next_pid=5
trace-5 [0] 1.660000000: irq_handler_entry: irq=11
trace-5 [0] 1.660000000: irq_handler_exit: irq=11
trace-5 [0] 1.660000000: sys_open(arg0: 0xd01ab44, arg1: 0x0, arg2:
0x1)
trace-5 [0] 1.660000000: sys_open -> 0x3
trace-5 [0] 1.660000000: sys_nxsched_get_streams()
trace-5 [0] 1.660000000: sys_nxsched_get_streams -> 0xd02bfcc
trace-5 [0] 1.660000000: sys_ioctl(arg0: 0x3, arg1: 0x2c01, arg2:
0xd02c888)
trace-5 [0] 1.660000000: sys_ioctl -> 0x0
trace-5 [0] 1.660000000: sys_ioctl(arg0: 0x3, arg1: 0x2c02, arg2:
0xd02c888)
```
## Impact
- New kernel configuration `SCHED_INSTRUMENTATION_RECORD_TASKNAME` and
`DRIVER_NOTERAM_TASKNAME_BUFSIZE` are added.
- New note driver interface `sched_note_add_taskname` is added.
## Testing
Tested with spresense:smp
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