static void __notrace vmm_profile_enter(void *ip, void *parent_ip)
{
int index;
irq_flags_t flags;
if (pctrl.is_in_trace)
return;
pctrl.is_in_trace = 1;
index = kallsyms_get_symbol_pos((long unsigned int)ip, NULL, NULL);
if (pctrl.stat[index].is_tracing == 1) {
goto out;
}
if (pctrl.stat[index].time_in != 0) {
goto out;
}
flags = vmm_spin_lock_irqsave(&pctrl.lock);
pctrl.stat[index].counter++;
pctrl.stat[index].is_tracing = 1;
pctrl.stat[index].time_in = vmm_timer_timestamp_for_profile();
vmm_spin_unlock_irqrestore(&pctrl.lock, flags);
out:
pctrl.is_in_trace = 0;
}
__notrace int kallsyms_lookup_symbol_name(unsigned long addr, char *symname)
{
unsigned long pos;
symname[0] = '\0';
symname[KSYM_NAME_LEN - 1] = '\0';
pos = kallsyms_get_symbol_pos(addr, NULL, NULL);
/* Grab name */
kallsyms_expand_symbol(kallsyms_get_symbol_offset(pos), symname);
return 0;
}
__notrace int kallsyms_lookup_symbol_attrs(unsigned long addr, unsigned long *size,
unsigned long *offset, char *name)
{
unsigned long pos;
name[0] = '\0';
name[KSYM_NAME_LEN - 1] = '\0';
pos = kallsyms_get_symbol_pos(addr, size, offset);
/* Grab name */
kallsyms_expand_symbol(kallsyms_get_symbol_offset(pos), name);
return 0;
}
const __notrace char *kallsyms_lookup(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset, char *namebuf)
{
unsigned long pos;
namebuf[KSYM_NAME_LEN - 1] = 0;
namebuf[0] = 0;
pos = kallsyms_get_symbol_pos(addr, symbolsize, offset);
/* Grab name */
kallsyms_expand_symbol(kallsyms_get_symbol_offset(pos), namebuf);
return namebuf;
}
static void __notrace vmm_profile_exit(void *ip, void *parent_ip)
{
int index;
u64 time;
irq_flags_t flags;
if (pctrl.is_in_trace) {
return;
}
pctrl.is_in_trace = 1;
index = kallsyms_get_symbol_pos((long unsigned int)ip, NULL, NULL);
// If this function was no traced yet ...
// we just return as we can't get the start timer
if (pctrl.stat[index].is_tracing != 1) {
goto out;
}
if (pctrl.stat[index].time_in == 0) {
goto out;
}
flags = vmm_spin_lock_irqsave(&pctrl.lock);
time = vmm_timer_timestamp_for_profile();
if (pctrl.stat[index].time_in < time) {
pctrl.stat[index].time += time - pctrl.stat[index].time_in;
} else {
//vmm_printf("negative time\n");
}
vmm_spin_unlock_irqrestore(&pctrl.lock, flags);
out:
pctrl.stat[index].time_in = 0;
// OK we don't trace this function anymore
pctrl.stat[index].is_tracing = 0;
pctrl.is_in_trace = 0;
}
static int cmd_profile_count_iterator(void *data, const char *name,
unsigned long addr)
{
struct count_record *ptr = data;
u32 index = kallsyms_get_symbol_pos(addr, NULL, NULL);
u32 count = vmm_profiler_get_function_count(addr);
u64 time = vmm_profiler_get_function_total_time(addr);
ptr += index;
/* It would be nice to have the strncpy variant */
strcpy(ptr->function_name, name);
ptr->function_name[39] = 0;
ptr->count = count;
ptr->total_time = time;
if (count) {
ptr->time_per_call = udiv64(time, (u64)count);
}
return VMM_OK;
}
u64 vmm_profiler_get_function_total_time(unsigned long addr)
{
return pctrl.stat[kallsyms_get_symbol_pos(addr, NULL, NULL)].time;
}
u64 vmm_profiler_get_function_count(unsigned long addr)
{
return pctrl.stat[kallsyms_get_symbol_pos(addr, NULL, NULL)].counter;
}
/*
* Lookup an address but don't bother to find any names.
*/
__notrace int kallsyms_lookup_size_offset(unsigned long addr,
unsigned long *symbolsize,
unsigned long *offset)
{
return ! !kallsyms_get_symbol_pos(addr, symbolsize, offset);
}