NAME¶
utrace
—
insert user record in ktrace log
LIBRARY¶
Standard C Library (libc, -lc)
SYNOPSIS¶
#include
<sys/types.h>
#include
<sys/param.h>
#include
<sys/time.h>
#include
<sys/uio.h>
#include
<sys/ktrace.h>
int
utrace
(
const
void *addr,
size_t len);
DESCRIPTION¶
Adds a record to the process trace with information supplied by user. The record
contains
len bytes from memory pointed to by
addr. This call only has an effect if the
calling process is being traced.
RETURN VALUES¶
Upon successful completion, the value 0 is returned; otherwise the
value -1 is returned and the global variable
errno is set to indicate the error.
ERRORS¶
- [
EINVAL
]
- Specified data length len was bigger than
KTR_USER_MAXLEN
.
- [
ENOMEM
]
- Insufficient memory to honor the request.
- [
ENOSYS
]
- Currently running kernel was compiled without
ktrace(2) support
(
options KTRACE
).
SEE ALSO¶
kdump(1),
ktrace(1),
ktrace(2)
HISTORY¶
The
utrace
() system call first appeared in
FreeBSD 2.2.