int tracecmd_ftrace_overrides(struct tracecmd_input *handle,
struct tracecmd_ftrace *finfo)
{
struct tep_handle *pevent;
struct tep_event *event;
finfo->handle = handle;
pevent = tracecmd_get_pevent(handle);
tep_register_event_handler(pevent, -1, "ftrace", "function",
function_handler, NULL);
tep_register_event_handler(pevent, -1, "ftrace", "funcgraph_entry",
fgraph_ent_handler, finfo);
tep_register_event_handler(pevent, -1, "ftrace", "funcgraph_exit",
fgraph_ret_handler, finfo);
tep_register_event_handler(pevent, -1, "ftrace", "kernel_stack",
trace_stack_handler, finfo);
trace_util_add_options("ftrace", trace_ftrace_options);
/* Store the func ret id and event for later use */
event = tep_find_event_by_name(pevent, "ftrace", "funcgraph_exit");
if (!event)
return 0;
finfo->long_size = tracecmd_long_size(handle);
finfo->fgraph_ret_id = event->id;
finfo->fgraph_ret_event = event;
return 0;
}
static void find_long_size(struct tracecmd_ftrace *finfo)
{
finfo->long_size = tracecmd_long_size(finfo->handle);
}
static void do_trace_hist(struct tracecmd_input *handle)
{
struct pevent *pevent = tracecmd_get_pevent(handle);
struct event_format *event;
struct pevent_record *record;
int cpus;
int cpu;
int ret;
ret = tracecmd_init_data(handle);
if (ret < 0)
die("failed to init data");
if (ret > 0)
die("trace-cmd hist does not work with latency traces\n");
cpus = tracecmd_cpus(handle);
/* Need to get any event */
for (cpu = 0; cpu < cpus; cpu++) {
record = tracecmd_peek_data(handle, cpu);
if (record)
break;
}
if (!record)
die("No records found in file");
ret = pevent_data_type(pevent, record);
event = pevent_data_event_from_type(pevent, ret);
long_size = tracecmd_long_size(handle);
common_type_field = pevent_find_common_field(event, "common_type");
if (!common_type_field)
die("Can't find a 'type' field?");
common_pid_field = pevent_find_common_field(event, "common_pid");
if (!common_pid_field)
die("Can't find a 'pid' field?");
update_sched_wakeup(pevent);
update_sched_wakeup_new(pevent);
update_sched_switch(pevent);
update_function(pevent);
update_function_graph_entry(pevent);
update_function_graph_exit(pevent);
update_kernel_stack(pevent);
for (cpu = 0; cpu < cpus; cpu++) {
for (;;) {
struct pevent_record *record;
record = tracecmd_read_data(handle, cpu);
if (!record)
break;
/* If we missed events, just flush out the current stack */
if (record->missed_events)
flush_stack();
process_record(pevent, record);
free_record(record);
}
}
if (current_pid >= 0)
save_call_chain(current_pid, ips, ips_idx, 0);
if (pending_pid >= 0)
save_call_chain(pending_pid, pending_ips, pending_ips_idx, 1);
save_stored_stacks();
sort_chains();
print_chains(pevent);
}