minix/kernel/system/do_cprofile.c

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/* The kernel call that is implemented in this file:
* m_type: SYS_CPROFILE
*
* The parameters for this kernel call are:
* m7_i1: PROF_ACTION (get/reset profiling data)
* m7_i2: PROF_MEM_SIZE (available memory for data)
* m7_i4: PROF_ENDPT (endpoint of caller)
* m7_p1: PROF_CTL_PTR (location of info struct)
* m7_p2: PROF_MEM_PTR (location of memory for data)
*
* Changes:
* 14 Aug, 2006 Created (Rogier Meurs)
*/
#include "../system.h"
#if CPROFILE
#include <string.h>
/*===========================================================================*
* do_cprofile *
*===========================================================================*/
PUBLIC int do_cprofile(m_ptr)
register message *m_ptr; /* pointer to request message */
{
int proc_nr, i, err = 0, k = 0;
vir_bytes vir_dst;
phys_bytes phys_src, phys_dst, len;
switch (m_ptr->PROF_ACTION) {
case PROF_RESET:
/* Reset profiling tables. */
cprof_ctl_inst.reset = 1;
kprintf("CPROFILE notice: resetting tables:");
for (i=0; i<cprof_procs_no; i++) {
kprintf(" %s", cprof_proc_info[i].name);
/* Test whether proc still alive. */
if (!isokendpt(cprof_proc_info[i].endpt, &proc_nr)) {
kprintf("endpt not valid %u (%s)\n",
cprof_proc_info[i].endpt, cprof_proc_info[i].name);
continue;
}
/* Set reset flag. */
phys_src = vir2phys((vir_bytes) &cprof_ctl_inst.reset);
phys_dst = (phys_bytes) cprof_proc_info[i].ctl;
len = (phys_bytes) sizeof(cprof_ctl_inst.reset);
phys_copy(phys_src, phys_dst, len);
}
kprintf("\n");
return OK;
case PROF_GET:
/* Get profiling data.
*
* Calculate physical addresses of user pointers. Copy to user
* program the info struct. Copy to user program the profiling
* tables of the profiled processes.
*/
if(!isokendpt(m_ptr->PROF_ENDPT, &proc_nr))
return EINVAL;
vir_dst = (vir_bytes) m_ptr->PROF_CTL_PTR;
len = (phys_bytes) sizeof (int *);
cprof_info_addr = numap_local(proc_nr, vir_dst, len);
vir_dst = (vir_bytes) m_ptr->PROF_MEM_PTR;
len = (phys_bytes) sizeof (char *);
cprof_data_addr = numap_local(proc_nr, vir_dst, len);
cprof_mem_size = m_ptr->PROF_MEM_SIZE;
kprintf("CPROFILE notice: getting tables:");
/* Copy control structs of profiled processes to calculate total
* nr of bytes to be copied to user program and find out if any
* errors happened. */
cprof_info.mem_used = 0;
cprof_info.err = 0;
for (i=0; i<cprof_procs_no; i++) {
kprintf(" %s", cprof_proc_info[i].name);
/* Test whether proc still alive. */
if (!isokendpt(cprof_proc_info[i].endpt, &proc_nr)) {
kprintf("endpt not valid %u (%s)\n",
cprof_proc_info[i].endpt, cprof_proc_info[i].name);
continue;
}
/* Copy control struct from proc to local variable. */
phys_src = cprof_proc_info[i].ctl;
phys_dst = vir2phys((vir_bytes) &cprof_ctl_inst);
len = (phys_bytes) sizeof(cprof_ctl_inst);
phys_copy(phys_src, phys_dst, len);
/* Calculate memory used. */
cprof_proc_info[i].slots_used = cprof_ctl_inst.slots_used;
cprof_info.mem_used += CPROF_PROCNAME_LEN;
cprof_info.mem_used += sizeof(cprof_proc_info_inst.slots_used);
cprof_info.mem_used += cprof_proc_info[i].slots_used *
sizeof(cprof_tbl_inst);
/* Collect errors. */
cprof_info.err |= cprof_ctl_inst.err;
}
kprintf("\n");
/* Do we have the space available? */
if (cprof_mem_size < cprof_info.mem_used) cprof_info.mem_used = -1;
/* Copy the info struct to the user process. */
phys_copy(vir2phys((vir_bytes) &cprof_info), cprof_info_addr,
(phys_bytes) sizeof(cprof_info));
/* If there is no space or errors occurred, don't bother copying. */
if (cprof_info.mem_used == -1 || cprof_info.err) return OK;
/* For each profiled process, copy its name, slots_used and profiling
* table to the user process. */
phys_dst = cprof_data_addr;
for (i=0; i<cprof_procs_no; i++) {
phys_src = vir2phys((vir_bytes) cprof_proc_info[i].name);
len = (phys_bytes) strlen(cprof_proc_info[i].name);
phys_copy(phys_src, phys_dst, len);
phys_dst += CPROF_PROCNAME_LEN;
phys_src = cprof_proc_info[i].ctl +
sizeof(cprof_ctl_inst.reset);
len = (phys_bytes) sizeof(cprof_ctl_inst.slots_used);
phys_copy(phys_src, phys_dst, len);
phys_dst += len;
phys_src = cprof_proc_info[i].buf;
len = (phys_bytes)
(sizeof(cprof_tbl_inst) * cprof_proc_info[i].slots_used);
phys_copy(phys_src, phys_dst, len);
phys_dst += len;
}
return OK;
default:
return EINVAL;
}
}
#endif /* CPROFILE */