YuuichiNakamura opened a new pull request #2044:
URL: https://github.com/apache/incubator-nuttx/pull/2044
## Summary
Add the option for syscall instrumentation to save arguments passed to
syscalls
## Impact
- `struct note_syscall_enter_s` will be changed to keep argc and args.
- `trace mode +a` command will be added to enable the feature
## Testing
spesense:smp
When the feature is enabled, `trace dump` can show what arguments are passed
to syscalls as follows:
```
trace-7 [0] 8.060000000: sys_open(arg0: 0xd01aa54, arg1: 0x0, arg2:
0x1)
trace-7 [0] 8.060000000: sys_open -> 0x3
trace-7 [0] 8.060000000: sys_nxsched_get_streams()
trace-7 [0] 8.060000000: sys_nxsched_get_streams -> 0xd02bfcc
trace-7 [0] 8.060000000: sys_ioctl(arg0: 0x3, arg1: 0x2c01, arg2:
0xd02c888)
trace-7 [0] 8.060000000: sys_ioctl -> 0x0
trace-7 [0] 8.060000000: sys_ioctl(arg0: 0x3, arg1: 0x2c02, arg2:
0xd02c888)
```
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