utrace(2)
insert user record in ktrace log
LIBRARY
Lb libc
SYNOPSIS
In sys/types.h
In sys/param.h
In sys/time.h
In sys/uio.h
In sys/ktrace.h
Ft int
Fn utrace const void *addr size_t len
DESCRIPTION
Adds a record to the process trace with information supplied by user.
The record contains
Fa len
bytes from memory pointed to by
Fa addr .
This call only has an effect if the calling process is being traced.
RETURN VALUES
Rv -std
ERRORS
- Bq Er EINVAL
-
Specified data length
Fa len
was bigger than
KTR_USER_MAXLEN
- Bq Er ENOMEM
-
Insufficient memory to honor the request.
- Bq Er ENOSYS
-
Currently running kernel was compiled without
ktrace(2)
support
(options KTRACE
)
HISTORY
The
Fn utrace
system call first appeared in
Fx 2.2 .
