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
31struct pevent *read_trace_init(int file_bigendian, int host_bigendian)
32{
33	struct pevent *pevent = pevent_alloc();
34
35	if (pevent != NULL) {
36		pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
37		pevent_set_file_bigendian(pevent, file_bigendian);
38		pevent_set_host_bigendian(pevent, host_bigendian);
39	}
40
41	return pevent;
42}
43
44static int get_common_field(struct scripting_context *context,
45			    int *offset, int *size, const char *type)
46{
47	struct pevent *pevent = context->pevent;
48	struct event_format *event;
49	struct format_field *field;
50
51	if (!*size) {
52		if (!pevent->events)
53			return 0;
54
55		event = pevent->events[0];
56		field = pevent_find_common_field(event, type);
57		if (!field)
58			return 0;
59		*offset = field->offset;
60		*size = field->size;
61	}
62
63	return pevent_read_number(pevent, context->event_data + *offset, *size);
64}
65
66int common_lock_depth(struct scripting_context *context)
67{
68	static int offset;
69	static int size;
70	int ret;
71
72	ret = get_common_field(context, &size, &offset,
73			       "common_lock_depth");
74	if (ret < 0)
75		return -1;
76
77	return ret;
78}
79
80int common_flags(struct scripting_context *context)
81{
82	static int offset;
83	static int size;
84	int ret;
85
86	ret = get_common_field(context, &size, &offset,
87			       "common_flags");
88	if (ret < 0)
89		return -1;
90
91	return ret;
92}
93
94int common_pc(struct scripting_context *context)
95{
96	static int offset;
97	static int size;
98	int ret;
99
100	ret = get_common_field(context, &size, &offset,
101			       "common_preempt_count");
102	if (ret < 0)
103		return -1;
104
105	return ret;
106}
107
108unsigned long long
109raw_field_value(struct event_format *event, const char *name, void *data)
110{
111	struct format_field *field;
112	unsigned long long val;
113
114	field = pevent_find_any_field(event, name);
115	if (!field)
116		return 0ULL;
117
118	pevent_read_number_field(field, data, &val);
119
120	return val;
121}
122
123void *raw_field_ptr(struct event_format *event, const char *name, void *data)
124{
125	struct format_field *field;
126
127	field = pevent_find_any_field(event, name);
128	if (!field)
129		return NULL;
130
131	if (field->flags & FIELD_IS_DYNAMIC) {
132		int offset;
133
134		offset = *(int *)(data + field->offset);
135		offset &= 0xffff;
136
137		return data + offset;
138	}
139
140	return data + field->offset;
141}
142
143int trace_parse_common_type(struct pevent *pevent, void *data)
144{
145	struct pevent_record record;
146
147	record.data = data;
148	return pevent_data_type(pevent, &record);
149}
150
151int trace_parse_common_pid(struct pevent *pevent, void *data)
152{
153	struct pevent_record record;
154
155	record.data = data;
156	return pevent_data_pid(pevent, &record);
157}
158
159unsigned long long read_size(struct event_format *event, void *ptr, int size)
160{
161	return pevent_read_number(event->pevent, ptr, size);
162}
163
164void event_format__print(struct event_format *event,
165			 int cpu, void *data, int size)
166{
167	struct pevent_record record;
168	struct trace_seq s;
169
170	memset(&record, 0, sizeof(record));
171	record.cpu = cpu;
172	record.size = size;
173	record.data = data;
174
175	trace_seq_init(&s);
176	pevent_event_info(&s, event, &record);
177	trace_seq_do_printf(&s);
178}
179
180void parse_proc_kallsyms(struct pevent *pevent,
181			 char *file, unsigned int size __maybe_unused)
182{
183	unsigned long long addr;
184	char *func;
185	char *line;
186	char *next = NULL;
187	char *addr_str;
188	char *mod;
189	char *fmt = NULL;
190
191	line = strtok_r(file, "\n", &next);
192	while (line) {
193		mod = NULL;
194		addr_str = strtok_r(line, " ", &fmt);
195		addr = strtoull(addr_str, NULL, 16);
196		/* skip character */
197		strtok_r(NULL, " ", &fmt);
198		func = strtok_r(NULL, "\t", &fmt);
199		mod = strtok_r(NULL, "]", &fmt);
200		/* truncate the extra '[' */
201		if (mod)
202			mod = mod + 1;
203
204		pevent_register_function(pevent, func, addr, mod);
205
206		line = strtok_r(NULL, "\n", &next);
207	}
208}
209
210void parse_ftrace_printk(struct pevent *pevent,
211			 char *file, unsigned int size __maybe_unused)
212{
213	unsigned long long addr;
214	char *printk;
215	char *line;
216	char *next = NULL;
217	char *addr_str;
218	char *fmt;
219
220	line = strtok_r(file, "\n", &next);
221	while (line) {
222		addr_str = strtok_r(line, ":", &fmt);
223		if (!addr_str) {
224			warning("printk format with empty entry");
225			break;
226		}
227		addr = strtoull(addr_str, NULL, 16);
228		/* fmt still has a space, skip it */
229		printk = strdup(fmt+1);
230		line = strtok_r(NULL, "\n", &next);
231		pevent_register_print_string(pevent, printk, addr);
232	}
233}
234
235int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
236{
237	return pevent_parse_event(pevent, buf, size, "ftrace");
238}
239
240int parse_event_file(struct pevent *pevent,
241		     char *buf, unsigned long size, char *sys)
242{
243	return pevent_parse_event(pevent, buf, size, sys);
244}
245
246struct event_format *trace_find_next_event(struct pevent *pevent,
247					   struct event_format *event)
248{
249	static int idx;
250
251	if (!pevent || !pevent->events)
252		return NULL;
253
254	if (!event) {
255		idx = 0;
256		return pevent->events[0];
257	}
258
259	if (idx < pevent->nr_events && event == pevent->events[idx]) {
260		idx++;
261		if (idx == pevent->nr_events)
262			return NULL;
263		return pevent->events[idx];
264	}
265
266	for (idx = 1; idx < pevent->nr_events; idx++) {
267		if (event == pevent->events[idx - 1])
268			return pevent->events[idx];
269	}
270	return NULL;
271}
272
273struct flag {
274	const char *name;
275	unsigned long long value;
276};
277
278static const struct flag flags[] = {
279	{ "HI_SOFTIRQ", 0 },
280	{ "TIMER_SOFTIRQ", 1 },
281	{ "NET_TX_SOFTIRQ", 2 },
282	{ "NET_RX_SOFTIRQ", 3 },
283	{ "BLOCK_SOFTIRQ", 4 },
284	{ "BLOCK_IOPOLL_SOFTIRQ", 5 },
285	{ "TASKLET_SOFTIRQ", 6 },
286	{ "SCHED_SOFTIRQ", 7 },
287	{ "HRTIMER_SOFTIRQ", 8 },
288	{ "RCU_SOFTIRQ", 9 },
289
290	{ "HRTIMER_NORESTART", 0 },
291	{ "HRTIMER_RESTART", 1 },
292};
293
294unsigned long long eval_flag(const char *flag)
295{
296	int i;
297
298	/*
299	 * Some flags in the format files do not get converted.
300	 * If the flag is not numeric, see if it is something that
301	 * we already know about.
302	 */
303	if (isdigit(flag[0]))
304		return strtoull(flag, NULL, 0);
305
306	for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
307		if (strcmp(flags[i].name, flag) == 0)
308			return flags[i].value;
309
310	return 0;
311}
312