1/*
2 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
3 *
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License (not later!)
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18 *
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 */
21#include <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24#include <ctype.h>
25#include <errno.h>
26
27#include "../perf.h"
28#include "util.h"
29#include "trace-event.h"
30
31static int get_common_field(struct scripting_context *context,
32			    int *offset, int *size, const char *type)
33{
34	struct pevent *pevent = context->pevent;
35	struct event_format *event;
36	struct format_field *field;
37
38	if (!*size) {
39		if (!pevent->events)
40			return 0;
41
42		event = pevent->events[0];
43		field = pevent_find_common_field(event, type);
44		if (!field)
45			return 0;
46		*offset = field->offset;
47		*size = field->size;
48	}
49
50	return pevent_read_number(pevent, context->event_data + *offset, *size);
51}
52
53int common_lock_depth(struct scripting_context *context)
54{
55	static int offset;
56	static int size;
57	int ret;
58
59	ret = get_common_field(context, &size, &offset,
60			       "common_lock_depth");
61	if (ret < 0)
62		return -1;
63
64	return ret;
65}
66
67int common_flags(struct scripting_context *context)
68{
69	static int offset;
70	static int size;
71	int ret;
72
73	ret = get_common_field(context, &size, &offset,
74			       "common_flags");
75	if (ret < 0)
76		return -1;
77
78	return ret;
79}
80
81int common_pc(struct scripting_context *context)
82{
83	static int offset;
84	static int size;
85	int ret;
86
87	ret = get_common_field(context, &size, &offset,
88			       "common_preempt_count");
89	if (ret < 0)
90		return -1;
91
92	return ret;
93}
94
95unsigned long long
96raw_field_value(struct event_format *event, const char *name, void *data)
97{
98	struct format_field *field;
99	unsigned long long val;
100
101	field = pevent_find_any_field(event, name);
102	if (!field)
103		return 0ULL;
104
105	pevent_read_number_field(field, data, &val);
106
107	return val;
108}
109
110unsigned long long read_size(struct event_format *event, void *ptr, int size)
111{
112	return pevent_read_number(event->pevent, ptr, size);
113}
114
115void event_format__fprintf(struct event_format *event,
116			   int cpu, void *data, int size, FILE *fp)
117{
118	struct pevent_record record;
119	struct trace_seq s;
120
121	memset(&record, 0, sizeof(record));
122	record.cpu = cpu;
123	record.size = size;
124	record.data = data;
125
126	trace_seq_init(&s);
127	pevent_event_info(&s, event, &record);
128	trace_seq_do_fprintf(&s, fp);
129	trace_seq_destroy(&s);
130}
131
132void event_format__print(struct event_format *event,
133			 int cpu, void *data, int size)
134{
135	return event_format__fprintf(event, cpu, data, size, stdout);
136}
137
138void parse_ftrace_printk(struct pevent *pevent,
139			 char *file, unsigned int size __maybe_unused)
140{
141	unsigned long long addr;
142	char *printk;
143	char *line;
144	char *next = NULL;
145	char *addr_str;
146	char *fmt = NULL;
147
148	line = strtok_r(file, "\n", &next);
149	while (line) {
150		addr_str = strtok_r(line, ":", &fmt);
151		if (!addr_str) {
152			warning("printk format with empty entry");
153			break;
154		}
155		addr = strtoull(addr_str, NULL, 16);
156		/* fmt still has a space, skip it */
157		printk = strdup(fmt+1);
158		line = strtok_r(NULL, "\n", &next);
159		pevent_register_print_string(pevent, printk, addr);
160	}
161}
162
163int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
164{
165	return pevent_parse_event(pevent, buf, size, "ftrace");
166}
167
168int parse_event_file(struct pevent *pevent,
169		     char *buf, unsigned long size, char *sys)
170{
171	return pevent_parse_event(pevent, buf, size, sys);
172}
173
174struct event_format *trace_find_next_event(struct pevent *pevent,
175					   struct event_format *event)
176{
177	static int idx;
178
179	if (!pevent || !pevent->events)
180		return NULL;
181
182	if (!event) {
183		idx = 0;
184		return pevent->events[0];
185	}
186
187	if (idx < pevent->nr_events && event == pevent->events[idx]) {
188		idx++;
189		if (idx == pevent->nr_events)
190			return NULL;
191		return pevent->events[idx];
192	}
193
194	for (idx = 1; idx < pevent->nr_events; idx++) {
195		if (event == pevent->events[idx - 1])
196			return pevent->events[idx];
197	}
198	return NULL;
199}
200
201struct flag {
202	const char *name;
203	unsigned long long value;
204};
205
206static const struct flag flags[] = {
207	{ "HI_SOFTIRQ", 0 },
208	{ "TIMER_SOFTIRQ", 1 },
209	{ "NET_TX_SOFTIRQ", 2 },
210	{ "NET_RX_SOFTIRQ", 3 },
211	{ "BLOCK_SOFTIRQ", 4 },
212	{ "BLOCK_IOPOLL_SOFTIRQ", 5 },
213	{ "TASKLET_SOFTIRQ", 6 },
214	{ "SCHED_SOFTIRQ", 7 },
215	{ "HRTIMER_SOFTIRQ", 8 },
216	{ "RCU_SOFTIRQ", 9 },
217
218	{ "HRTIMER_NORESTART", 0 },
219	{ "HRTIMER_RESTART", 1 },
220};
221
222unsigned long long eval_flag(const char *flag)
223{
224	int i;
225
226	/*
227	 * Some flags in the format files do not get converted.
228	 * If the flag is not numeric, see if it is something that
229	 * we already know about.
230	 */
231	if (isdigit(flag[0]))
232		return strtoull(flag, NULL, 0);
233
234	for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
235		if (strcmp(flags[i].name, flag) == 0)
236			return flags[i].value;
237
238	return 0;
239}
240