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
read_trace_init(int file_bigendian,int host_bigendian)31 struct 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
get_common_field(struct scripting_context * context,int * offset,int * size,const char * type)44 static 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
common_lock_depth(struct scripting_context * context)66 int 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
common_flags(struct scripting_context * context)80 int 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
common_pc(struct scripting_context * context)94 int 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
108 unsigned long long
raw_field_value(struct event_format * event,const char * name,void * data)109 raw_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
raw_field_ptr(struct event_format * event,const char * name,void * data)123 void *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
trace_parse_common_type(struct pevent * pevent,void * data)143 int 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
trace_parse_common_pid(struct pevent * pevent,void * data)151 int 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
read_size(struct event_format * event,void * ptr,int size)159 unsigned long long read_size(struct event_format *event, void *ptr, int size)
160 {
161 return pevent_read_number(event->pevent, ptr, size);
162 }
163
event_format__print(struct event_format * event,int cpu,void * data,int size)164 void 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
parse_proc_kallsyms(struct pevent * pevent,char * file,unsigned int size __maybe_unused)180 void 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
parse_ftrace_printk(struct pevent * pevent,char * file,unsigned int size __maybe_unused)210 void 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
parse_ftrace_file(struct pevent * pevent,char * buf,unsigned long size)235 int parse_ftrace_file(struct pevent *pevent, char *buf, unsigned long size)
236 {
237 return pevent_parse_event(pevent, buf, size, "ftrace");
238 }
239
parse_event_file(struct pevent * pevent,char * buf,unsigned long size,char * sys)240 int 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
trace_find_next_event(struct pevent * pevent,struct event_format * event)246 struct 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
273 struct flag {
274 const char *name;
275 unsigned long long value;
276 };
277
278 static 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
eval_flag(const char * flag)294 unsigned 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