DragonFly On-Line Manual Pages


UTRACE(2)		 DragonFly 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 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. [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. DragonFly 3.7 October 16, 2008 DragonFly 3.7