Loading...
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
31int header_page_size_size;
32int header_page_ts_size;
33int header_page_data_offset;
34
35struct pevent *perf_pevent;
36static struct pevent *pevent;
37
38bool latency_format;
39
40int read_trace_init(int file_bigendian, int host_bigendian)
41{
42 if (pevent)
43 return 0;
44
45 perf_pevent = pevent_alloc();
46 pevent = perf_pevent;
47
48 pevent_set_flag(pevent, PEVENT_NSEC_OUTPUT);
49 pevent_set_file_bigendian(pevent, file_bigendian);
50 pevent_set_host_bigendian(pevent, host_bigendian);
51
52 return 0;
53}
54
55static int get_common_field(struct scripting_context *context,
56 int *offset, int *size, const char *type)
57{
58 struct event_format *event;
59 struct format_field *field;
60
61 if (!*size) {
62 if (!pevent->events)
63 return 0;
64
65 event = pevent->events[0];
66 field = pevent_find_common_field(event, type);
67 if (!field)
68 return 0;
69 *offset = field->offset;
70 *size = field->size;
71 }
72
73 return pevent_read_number(pevent, context->event_data + *offset, *size);
74}
75
76int common_lock_depth(struct scripting_context *context)
77{
78 static int offset;
79 static int size;
80 int ret;
81
82 ret = get_common_field(context, &size, &offset,
83 "common_lock_depth");
84 if (ret < 0)
85 return -1;
86
87 return ret;
88}
89
90int common_flags(struct scripting_context *context)
91{
92 static int offset;
93 static int size;
94 int ret;
95
96 ret = get_common_field(context, &size, &offset,
97 "common_flags");
98 if (ret < 0)
99 return -1;
100
101 return ret;
102}
103
104int common_pc(struct scripting_context *context)
105{
106 static int offset;
107 static int size;
108 int ret;
109
110 ret = get_common_field(context, &size, &offset,
111 "common_preempt_count");
112 if (ret < 0)
113 return -1;
114
115 return ret;
116}
117
118unsigned long long
119raw_field_value(struct event_format *event, const char *name, void *data)
120{
121 struct format_field *field;
122 unsigned long long val;
123
124 field = pevent_find_any_field(event, name);
125 if (!field)
126 return 0ULL;
127
128 pevent_read_number_field(field, data, &val);
129
130 return val;
131}
132
133void *raw_field_ptr(struct event_format *event, const char *name, void *data)
134{
135 struct format_field *field;
136
137 field = pevent_find_any_field(event, name);
138 if (!field)
139 return NULL;
140
141 if (field->flags & FIELD_IS_DYNAMIC) {
142 int offset;
143
144 offset = *(int *)(data + field->offset);
145 offset &= 0xffff;
146
147 return data + offset;
148 }
149
150 return data + field->offset;
151}
152
153int trace_parse_common_type(void *data)
154{
155 struct pevent_record record;
156
157 record.data = data;
158 return pevent_data_type(pevent, &record);
159}
160
161int trace_parse_common_pid(void *data)
162{
163 struct pevent_record record;
164
165 record.data = data;
166 return pevent_data_pid(pevent, &record);
167}
168
169unsigned long long read_size(void *ptr, int size)
170{
171 return pevent_read_number(pevent, ptr, size);
172}
173
174struct event_format *trace_find_event(int type)
175{
176 return pevent_find_event(pevent, type);
177}
178
179
180void print_trace_event(int cpu, void *data, int size)
181{
182 struct event_format *event;
183 struct pevent_record record;
184 struct trace_seq s;
185 int type;
186
187 type = trace_parse_common_type(data);
188
189 event = trace_find_event(type);
190 if (!event) {
191 warning("ug! no event found for type %d", type);
192 return;
193 }
194
195 memset(&record, 0, sizeof(record));
196 record.cpu = cpu;
197 record.size = size;
198 record.data = data;
199
200 trace_seq_init(&s);
201 pevent_event_info(&s, event, &record);
202 trace_seq_do_printf(&s);
203}
204
205void print_event(int cpu, void *data, int size, unsigned long long nsecs,
206 char *comm)
207{
208 struct pevent_record record;
209 struct trace_seq s;
210 int pid;
211
212 pevent->latency_format = latency_format;
213
214 record.ts = nsecs;
215 record.cpu = cpu;
216 record.size = size;
217 record.data = data;
218 pid = pevent_data_pid(pevent, &record);
219
220 if (!pevent_pid_is_registered(pevent, pid))
221 pevent_register_comm(pevent, comm, pid);
222
223 trace_seq_init(&s);
224 pevent_print_event(pevent, &s, &record);
225 trace_seq_do_printf(&s);
226 printf("\n");
227}
228
229void parse_proc_kallsyms(char *file, unsigned int size __unused)
230{
231 unsigned long long addr;
232 char *func;
233 char *line;
234 char *next = NULL;
235 char *addr_str;
236 char *mod;
237 char ch;
238
239 line = strtok_r(file, "\n", &next);
240 while (line) {
241 mod = NULL;
242 sscanf(line, "%as %c %as\t[%as",
243 (float *)(void *)&addr_str, /* workaround gcc warning */
244 &ch, (float *)(void *)&func, (float *)(void *)&mod);
245 addr = strtoull(addr_str, NULL, 16);
246 free(addr_str);
247
248 /* truncate the extra ']' */
249 if (mod)
250 mod[strlen(mod) - 1] = 0;
251
252 pevent_register_function(pevent, func, addr, mod);
253 free(func);
254 free(mod);
255
256 line = strtok_r(NULL, "\n", &next);
257 }
258}
259
260void parse_ftrace_printk(char *file, unsigned int size __unused)
261{
262 unsigned long long addr;
263 char *printk;
264 char *line;
265 char *next = NULL;
266 char *addr_str;
267 char *fmt;
268
269 line = strtok_r(file, "\n", &next);
270 while (line) {
271 addr_str = strtok_r(line, ":", &fmt);
272 if (!addr_str) {
273 warning("printk format with empty entry");
274 break;
275 }
276 addr = strtoull(addr_str, NULL, 16);
277 /* fmt still has a space, skip it */
278 printk = strdup(fmt+1);
279 line = strtok_r(NULL, "\n", &next);
280 pevent_register_print_string(pevent, printk, addr);
281 }
282}
283
284int parse_ftrace_file(char *buf, unsigned long size)
285{
286 return pevent_parse_event(pevent, buf, size, "ftrace");
287}
288
289int parse_event_file(char *buf, unsigned long size, char *sys)
290{
291 return pevent_parse_event(pevent, buf, size, sys);
292}
293
294struct event_format *trace_find_next_event(struct event_format *event)
295{
296 static int idx;
297
298 if (!pevent->events)
299 return NULL;
300
301 if (!event) {
302 idx = 0;
303 return pevent->events[0];
304 }
305
306 if (idx < pevent->nr_events && event == pevent->events[idx]) {
307 idx++;
308 if (idx == pevent->nr_events)
309 return NULL;
310 return pevent->events[idx];
311 }
312
313 for (idx = 1; idx < pevent->nr_events; idx++) {
314 if (event == pevent->events[idx - 1])
315 return pevent->events[idx];
316 }
317 return NULL;
318}
319
320struct flag {
321 const char *name;
322 unsigned long long value;
323};
324
325static const struct flag flags[] = {
326 { "HI_SOFTIRQ", 0 },
327 { "TIMER_SOFTIRQ", 1 },
328 { "NET_TX_SOFTIRQ", 2 },
329 { "NET_RX_SOFTIRQ", 3 },
330 { "BLOCK_SOFTIRQ", 4 },
331 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
332 { "TASKLET_SOFTIRQ", 6 },
333 { "SCHED_SOFTIRQ", 7 },
334 { "HRTIMER_SOFTIRQ", 8 },
335 { "RCU_SOFTIRQ", 9 },
336
337 { "HRTIMER_NORESTART", 0 },
338 { "HRTIMER_RESTART", 1 },
339};
340
341unsigned long long eval_flag(const char *flag)
342{
343 int i;
344
345 /*
346 * Some flags in the format files do not get converted.
347 * If the flag is not numeric, see if it is something that
348 * we already know about.
349 */
350 if (isdigit(flag[0]))
351 return strtoull(flag, NULL, 0);
352
353 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
354 if (strcmp(flags[i].name, flag) == 0)
355 return flags[i].value;
356
357 return 0;
358}