minix/kernel/system/do_profbuf.c
Ben Gras 7195fe3325 System statistical and call profiling
support by Rogier Meurs <rogier@meurs.org>.
2006-10-30 15:53:38 +00:00

55 lines
1.6 KiB
C

/* The kernel call that is implemented in this file:
* m_type: SYS_PROFBUF
*
* The parameters for this kernel call are:
* m7_p1: PROF_CTL_PTR (location of control struct)
* m7_p2: PROF_MEM_PTR (location of profiling table)
*
* Changes:
* 14 Aug, 2006 Created (Rogier Meurs)
*/
#include "../system.h"
#if CPROFILE
/*===========================================================================*
* do_profbuf *
*===========================================================================*/
PUBLIC int do_profbuf(m_ptr)
register message *m_ptr; /* pointer to request message */
{
/* This kernel call is used by profiled system processes when Call
* Profiling is enabled. It is called on the first execution of procentry.
* By means of this kernel call, the profiled processes inform the kernel
* about the location of their profiling table and the control structure
* which is used to enable the kernel to have the tables cleared.
*/
int proc_nr, len;
vir_bytes vir_dst;
struct proc *rp;
/* Store process name, control struct, table locations. */
isokendpt(m_ptr->m_source, &proc_nr);
rp = proc_addr(proc_nr);
cprof_proc_info[cprof_procs_no].endpt = who_e;
cprof_proc_info[cprof_procs_no].name = rp->p_name;
len = (phys_bytes) sizeof (void *);
vir_dst = (vir_bytes) m_ptr->PROF_CTL_PTR;
cprof_proc_info[cprof_procs_no].ctl =
numap_local(proc_nr, vir_dst, len);
vir_dst = (vir_bytes) m_ptr->PROF_MEM_PTR;
cprof_proc_info[cprof_procs_no].buf =
numap_local(proc_nr, vir_dst, len);
cprof_procs_no++;
return OK;
}
#endif /* CPROFILE */