161 строка
4.4 KiB
C
161 строка
4.4 KiB
C
/*
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* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License (not later!)
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <http://www.gnu.org/licenses>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "event-parse.h"
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static void write_state(struct trace_seq *s, int val)
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{
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const char states[] = "SDTtZXxW";
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int found = 0;
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int i;
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for (i = 0; i < (sizeof(states) - 1); i++) {
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if (!(val & (1 << i)))
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continue;
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if (found)
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trace_seq_putc(s, '|');
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found = 1;
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trace_seq_putc(s, states[i]);
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}
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if (!found)
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trace_seq_putc(s, 'R');
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}
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static void write_and_save_comm(struct format_field *field,
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struct pevent_record *record,
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struct trace_seq *s, int pid)
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{
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const char *comm;
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int len;
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comm = (char *)(record->data + field->offset);
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len = s->len;
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trace_seq_printf(s, "%.*s",
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field->size, comm);
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/* make sure the comm has a \0 at the end. */
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trace_seq_terminate(s);
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comm = &s->buffer[len];
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/* Help out the comm to ids. This will handle dups */
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pevent_register_comm(field->event->pevent, comm, pid);
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}
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static int sched_wakeup_handler(struct trace_seq *s,
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struct pevent_record *record,
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struct event_format *event, void *context)
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{
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struct format_field *field;
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unsigned long long val;
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if (pevent_get_field_val(s, event, "pid", record, &val, 1))
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return trace_seq_putc(s, '!');
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field = pevent_find_any_field(event, "comm");
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if (field) {
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write_and_save_comm(field, record, s, val);
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trace_seq_putc(s, ':');
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}
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trace_seq_printf(s, "%lld", val);
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if (pevent_get_field_val(s, event, "prio", record, &val, 0) == 0)
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trace_seq_printf(s, " [%lld]", val);
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if (pevent_get_field_val(s, event, "success", record, &val, 1) == 0)
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trace_seq_printf(s, " success=%lld", val);
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if (pevent_get_field_val(s, event, "target_cpu", record, &val, 0) == 0)
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trace_seq_printf(s, " CPU:%03llu", val);
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return 0;
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}
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static int sched_switch_handler(struct trace_seq *s,
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struct pevent_record *record,
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struct event_format *event, void *context)
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{
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struct format_field *field;
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unsigned long long val;
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if (pevent_get_field_val(s, event, "prev_pid", record, &val, 1))
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return trace_seq_putc(s, '!');
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field = pevent_find_any_field(event, "prev_comm");
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if (field) {
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write_and_save_comm(field, record, s, val);
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trace_seq_putc(s, ':');
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}
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trace_seq_printf(s, "%lld ", val);
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if (pevent_get_field_val(s, event, "prev_prio", record, &val, 0) == 0)
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trace_seq_printf(s, "[%d] ", (int) val);
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if (pevent_get_field_val(s, event, "prev_state", record, &val, 0) == 0)
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write_state(s, val);
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trace_seq_puts(s, " ==> ");
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if (pevent_get_field_val(s, event, "next_pid", record, &val, 1))
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return trace_seq_putc(s, '!');
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field = pevent_find_any_field(event, "next_comm");
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if (field) {
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write_and_save_comm(field, record, s, val);
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trace_seq_putc(s, ':');
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}
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trace_seq_printf(s, "%lld", val);
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if (pevent_get_field_val(s, event, "next_prio", record, &val, 0) == 0)
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trace_seq_printf(s, " [%d]", (int) val);
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return 0;
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}
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int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
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{
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pevent_register_event_handler(pevent, -1, "sched", "sched_switch",
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sched_switch_handler, NULL);
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pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup",
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sched_wakeup_handler, NULL);
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pevent_register_event_handler(pevent, -1, "sched", "sched_wakeup_new",
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sched_wakeup_handler, NULL);
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return 0;
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}
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void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
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{
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pevent_unregister_event_handler(pevent, -1, "sched", "sched_switch",
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sched_switch_handler, NULL);
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pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup",
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sched_wakeup_handler, NULL);
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pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup_new",
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sched_wakeup_handler, NULL);
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}
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