utrace2
Insert user record in ktrace log
Usage
#include <sys/param.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/ktrace.h>
int
utrace(const void *addr, size_t len);
Library
Standard C Library (libc, -lc)
Overview
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
The utrace() function returns the value 0 if successful; 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).
Releases
54 releases since FreeBSD 5.2-RELEASE; the text changed 33 times.