summaryrefslogtreecommitdiffstats
path: root/tools/perf/util/trace-event-parse.c
blob: 0715c843c2e73ad6fc61832854cb33571732a73f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
/*
 * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

#include "../perf.h"
#include "util.h"
#include "trace-event.h"

int header_page_size_size;
int header_page_ts_size;
int header_page_data_offset;

bool latency_format;

struct pevent *read_trace_init(int file_bigendian, int host_bigendian)
{
	struct pevent *pevent = pevent_alloc();

	if (pevent != NULL) {
		pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
		pevent_set_file_bigendian(pevent, file_bigendian);
		pevent_set_host_bigendian(pevent, host_bigendian);
	}

	return pevent;
}

static int get_common_field(struct scripting_context *context,
			    int *offset, int *size, const char *type)
{
	struct pevent *pevent = context->pevent;
	struct event_format *event;
	struct format_field *field;

	if (!*size) {
		if (!pevent->events)
			return 0;

		event = pevent->events[0];
		field = pevent_find_common_field(event, type);
		if (!field)
			return 0;
		*offset = field->offset;
		*size = field->size;
	}

	return pevent_read_number(pevent, context->event_data + *offset, *size);
}

int common_lock_depth(struct scripting_context *context)
{
	static int offset;
	static int size;
	int ret;

	ret = get_common_field(context, &size, &offset,
			       "common_lock_depth");
	if (ret < 0)
		return -1;

	return ret;
}

int common_flags(struct scripting_context *context)
{
	static int offset;
	static int size;
	int ret;

	ret = get_common_field(context, &size, &offset,
			       "common_flags");
	if (ret < 0)
		return -1;

	return ret;
}

int common_pc(struct scripting_context *context)
{
	static int offset;
	static int size;
	int ret;

	ret = get_common_field(context, &size, &offset,
			       "common_preempt_count");
	if (ret < 0)
		return -1;

	return ret;
}

unsigned long long
raw_field_value(struct event_format *event, const char *name, void *data)
{
	struct format_field *field;
	unsigned long long val;

	field = pevent_find_any_field(event, name);
	if (!field)
		return 0ULL;

	pevent_read_number_field(field, data, &val);

	return val;
}

void *raw_field_ptr(struct event_format *event, const char *name, void *data)
{
	struct format_field *field;

	field = pevent_find_any_field(event, name);
	if (!field)
		return NULL;

	if (field->flags & FIELD_IS_DYNAMIC) {
		int offset;

		offset = *(int *)(data + field->offset);
		offset &= 0xffff;

		return data + offset;
	}

	return data + field->offset;
}

int trace_parse_common_type(struct pevent *pevent, void *data)
{
	struct pevent_record record;

	record.data = data;
	return pevent_data_type(pevent, &record);
}

int trace_parse_common_pid(struct pevent *pevent, void *data)
{
	struct pevent_record record;

	record.data = data;
	return pevent_data_pid(pevent, &record);
}

unsigned long long read_size(struct pevent *pevent, void *ptr, int size)
{
	return pevent_read_number(pevent, ptr, size);
}

void print_trace_event(struct pevent *pevent, int cpu, void *data, int size)
{
	struct event_format *event;
	struct pevent_record record;
	struct trace_seq s;
	int type;

	type = trace_parse_common_type(pevent, data);

	event = pevent_find_event(pevent, type);
	if (!event) {
		warning("ug! no event found for type %d", type);
		return;
	}

	memset(&record, 0, sizeof(record));
	record.cpu = cpu;
	record.size = size;
	record.data = data;

	trace_seq_init(&s);
	pevent_event_info(&s, event, &record);
	trace_seq_do_printf(&s);
}

void print_event(struct pevent *pevent, int cpu, void *data, int size,
		 unsigned long long nsecs, char *comm)
{
	struct pevent_record record;
	struct trace_seq s;
	int pid;

	pevent->latency_format = latency_format;

	record.ts = nsecs;
	record.cpu = cpu;
	record.size = size;
	record.data = data;
	pid = pevent_data_pid(pevent, &record);

	if (!pevent_pid_is_registered(pevent, pid))
		pevent_register_comm(pevent, comm, pid);

	trace_seq_init(&s);
	pevent_print_event(pevent, &s, &record);
	trace_seq_do_printf(&s);
	printf("\n");
}

void parse_proc_kallsyms(struct pevent *pevent,
			 char *file, unsigned int size __unused)
{
	unsigned long long addr;
	char *func;
	char *line;
	char *next = NULL;
	char *addr_str;
	char *mod;
	char ch;

	line = strtok_r(file, "\n", &next);
	while (line) {
		mod = NULL;
		sscanf(line, "%as %c %as\t[%as",
		       (float *)(void *)&addr_str, /* workaround gcc warning */
		       &ch, (float *)(void *)&func, (float *)(void *)&mod);
		addr = strtoull(addr_str, NULL, 16);
		free(addr_str);

		/* truncate the extra ']' */
		if (mod)
			mod[strlen(mod) - 1] = 0;

		pevent_register_function(pevent, func, addr, mod);
		free(func);
		free(mod);

		line = strtok_r(NULL, "\n", &next);
	}
}

void parse_ftrace_printk(struct pevent *pevent,
			 char *file, unsigned int size __unused)
{
	unsigned long long addr;
	char *printk;
	char *line;
	char *next = NULL;
	char *addr_str;
	char *fmt;

	line = strtok_r(file, "\n", &next);
	while (line) {
		addr_str = strtok_r(line, ":", &fmt);
		if (!addr_str) {
			warning("printk format with empty entry");
			break;
		}
		addr = strtoull(addr_str, NULL, 16);
		/* fmt still has a space, skip it */
		printk = strdup(fmt+1);
		line = strtok_r(NULL, "\n", &next);
		pevent_register_print_string(pevent, printk, addr);
	}
}

int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
{
	return pevent_parse_event(pevent, buf, size, "ftrace");
}

int parse_event_file(struct pevent *pevent,
		     char *buf, unsigned long size, char *sys)
{
	return pevent_parse_event(pevent, buf, size, sys);
}

struct event_format *trace_find_next_event(struct pevent *pevent,
					   struct event_format *event)
{
	static int idx;

	if (!pevent->events)
		return NULL;

	if (!event) {
		idx = 0;
		return pevent->events[0];
	}

	if (idx < pevent->nr_events && event == pevent->events[idx]) {
		idx++;
		if (idx == pevent->nr_events)
			return NULL;
		return pevent->events[idx];
	}

	for (idx = 1; idx < pevent->nr_events; idx++) {
		if (event == pevent->events[idx - 1])
			return pevent->events[idx];
	}
	return NULL;
}

struct flag {
	const char *name;
	unsigned long long value;
};

static const struct flag flags[] = {
	{ "HI_SOFTIRQ", 0 },
	{ "TIMER_SOFTIRQ", 1 },
	{ "NET_TX_SOFTIRQ", 2 },
	{ "NET_RX_SOFTIRQ", 3 },
	{ "BLOCK_SOFTIRQ", 4 },
	{ "BLOCK_IOPOLL_SOFTIRQ", 5 },
	{ "TASKLET_SOFTIRQ", 6 },
	{ "SCHED_SOFTIRQ", 7 },
	{ "HRTIMER_SOFTIRQ", 8 },
	{ "RCU_SOFTIRQ", 9 },

	{ "HRTIMER_NORESTART", 0 },
	{ "HRTIMER_RESTART", 1 },
};

unsigned long long eval_flag(const char *flag)
{
	int i;

	/*
	 * Some flags in the format files do not get converted.
	 * If the flag is not numeric, see if it is something that
	 * we already know about.
	 */
	if (isdigit(flag[0]))
		return strtoull(flag, NULL, 0);

	for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
		if (strcmp(flags[i].name, flag) == 0)
			return flags[i].value;

	return 0;
}
OpenPOWER on IntegriCloud