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