utrace(2) - NetBSD Manual Pages

UTRACE(2)                 NetBSD System Calls Manual                 UTRACE(2)


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 char *label, void *addr, size_t len);


DESCRIPTION

     Adds a record to the 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 only has an effect if the calling process
     is being traced.


RETURN VALUES

     Upon successful completion, a value of 0 is returned.  Otherwise, a value
     of -1 is returned and errno is set to indicate the error.


ERRORS

     [ENOSYS]           Currently running kernel was compiled without
                        ktrace(2) support (option KTRACE).

     [EINVAL]           Specified data length len was bigger than
                        KTR_USER_MAXLEN.


SEE ALSO

     kdump(1), ktrace(1), ktruss(1), fktrace(2), ktrace(2), options(4)


HISTORY

     The utrace() system call first appeared in FreeBSD 2.2.  It was added to
     NetBSD in NetBSD 1.6.  The label argument is a NetBSD extension.

NetBSD 9.0                     December 28, 2000                    NetBSD 9.0