|UTRACE(2)||FreeBSD System Calls Manual||UTRACE(2)|
NAMEutrace — insert user record in ktrace log
LIBRARYStandard 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>
utrace( const void *addr, size_t len);
DESCRIPTIONAdds 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 VALUESUpon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.
- [ 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).
HISTORYThe utrace() system call first appeared in FreeBSD 2.2.
|December 28, 2000||FreeBSD|