utrace - insert user record to ktrace records
Standard C Library (libc, -lc)
utrace(const char *label, void *addr, size_t len);
Adds a record to process trace with information supplied by user. The
record is identified by label and contains len bytes from memory pointed
to by addr. This call has only effect if the caller process is being
Upon successful completion, a value of 0 is returned. Otherwise, a value
of -1 is returned and errno is set to indicate the error.
[ENOSYS] Currently running kernel was compiled without
ktrace(2) support (option KTRACE).
[EINVAL] Specified data length len was bigger than
kdump(1), ktrace(1), ktruss(1), fktrace(2), ktrace(2), options(4)
The utrace() system call first appeared in FreeBSD 2.2. It was added to
NetBSD in NetBSD 1.6. The label argument is NetBSD extension.
BSD December 28, 2000 BSD
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