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Command: utrace | Section: 2 | Source: OpenBSD | File: utrace.2
UTRACE(2) FreeBSD System Calls Manual UTRACE(2)
NAME
utrace - insert user record in ktrace log
SYNOPSIS
#include <sys/types.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 the 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, the value 0 is returned; otherwise the
value -1 is returned and the global variable errno is set to indicate the
error.
ERRORS
[ENOSYS] The currently running kernel was compiled without
ktrace(2) support (option KTRACE).
[ENAMETOOLONG] The length of the label string was longer than
KTR_USER_MAXIDLEN-1.
[EINVAL] The specified data length len was bigger than
KTR_USER_MAXLEN.
SEE ALSO
kdump(1), ktrace(1), ktrace(2), options(4)
HISTORY
The utrace() system call first appeared in FreeBSD 2.2. It was added to
OpenBSD in OpenBSD 5.4. The label argument is an extension.
FreeBSD 14.1-RELEASE-p8 February 23, 2023 FreeBSD 14.1-RELEASE-p8