perf session: Event statistics also are per session
[linux-2.6.git] / tools / perf / builtin-trace.c
1 #include "builtin.h"
2
3 #include "util/util.h"
4 #include "util/cache.h"
5 #include "util/symbol.h"
6 #include "util/thread.h"
7 #include "util/header.h"
8 #include "util/exec_cmd.h"
9 #include "util/trace-event.h"
10 #include "util/session.h"
11
12 static char const               *script_name;
13 static char const               *generate_script_lang;
14
15 static int default_start_script(const char *script __attribute((unused)))
16 {
17         return 0;
18 }
19
20 static int default_stop_script(void)
21 {
22         return 0;
23 }
24
25 static int default_generate_script(const char *outfile __attribute ((unused)))
26 {
27         return 0;
28 }
29
30 static struct scripting_ops default_scripting_ops = {
31         .start_script           = default_start_script,
32         .stop_script            = default_stop_script,
33         .process_event          = print_event,
34         .generate_script        = default_generate_script,
35 };
36
37 static struct scripting_ops     *scripting_ops;
38
39 static void setup_scripting(void)
40 {
41         /* make sure PERF_EXEC_PATH is set for scripts */
42         perf_set_argv_exec_path(perf_exec_path());
43
44         setup_perl_scripting();
45
46         scripting_ops = &default_scripting_ops;
47 }
48
49 static int cleanup_scripting(void)
50 {
51         return scripting_ops->stop_script();
52 }
53
54 #include "util/parse-options.h"
55
56 #include "perf.h"
57 #include "util/debug.h"
58
59 #include "util/trace-event.h"
60 #include "util/exec_cmd.h"
61
62 static char const               *input_name = "perf.data";
63
64 static int process_sample_event(event_t *event, struct perf_session *session)
65 {
66         struct sample_data data;
67         struct thread *thread;
68
69         memset(&data, 0, sizeof(data));
70         data.time = -1;
71         data.cpu = -1;
72         data.period = 1;
73
74         event__parse_sample(event, session->sample_type, &data);
75
76         dump_printf("(IP, %d): %d/%d: %p period: %Ld\n",
77                 event->header.misc,
78                 data.pid, data.tid,
79                 (void *)(long)data.ip,
80                 (long long)data.period);
81
82         thread = perf_session__findnew(session, event->ip.pid);
83         if (thread == NULL) {
84                 pr_debug("problem processing %d event, skipping it.\n",
85                          event->header.type);
86                 return -1;
87         }
88
89         if (session->sample_type & PERF_SAMPLE_RAW) {
90                 /*
91                  * FIXME: better resolve from pid from the struct trace_entry
92                  * field, although it should be the same than this perf
93                  * event pid
94                  */
95                 scripting_ops->process_event(data.cpu, data.raw_data,
96                                              data.raw_size,
97                                              data.time, thread->comm);
98         }
99
100         session->events_stats.total += data.period;
101         return 0;
102 }
103
104 static int sample_type_check(struct perf_session *session)
105 {
106         if (!(session->sample_type & PERF_SAMPLE_RAW)) {
107                 fprintf(stderr,
108                         "No trace sample to read. Did you call perf record "
109                         "without -R?");
110                 return -1;
111         }
112
113         return 0;
114 }
115
116 static struct perf_event_ops event_ops = {
117         .process_sample_event   = process_sample_event,
118         .process_comm_event     = event__process_comm,
119         .sample_type_check      = sample_type_check,
120 };
121
122 static int __cmd_trace(struct perf_session *session)
123 {
124         return perf_session__process_events(session, &event_ops);
125 }
126
127 struct script_spec {
128         struct list_head        node;
129         struct scripting_ops    *ops;
130         char                    spec[0];
131 };
132
133 LIST_HEAD(script_specs);
134
135 static struct script_spec *script_spec__new(const char *spec,
136                                             struct scripting_ops *ops)
137 {
138         struct script_spec *s = malloc(sizeof(*s) + strlen(spec) + 1);
139
140         if (s != NULL) {
141                 strcpy(s->spec, spec);
142                 s->ops = ops;
143         }
144
145         return s;
146 }
147
148 static void script_spec__delete(struct script_spec *s)
149 {
150         free(s->spec);
151         free(s);
152 }
153
154 static void script_spec__add(struct script_spec *s)
155 {
156         list_add_tail(&s->node, &script_specs);
157 }
158
159 static struct script_spec *script_spec__find(const char *spec)
160 {
161         struct script_spec *s;
162
163         list_for_each_entry(s, &script_specs, node)
164                 if (strcasecmp(s->spec, spec) == 0)
165                         return s;
166         return NULL;
167 }
168
169 static struct script_spec *script_spec__findnew(const char *spec,
170                                                 struct scripting_ops *ops)
171 {
172         struct script_spec *s = script_spec__find(spec);
173
174         if (s)
175                 return s;
176
177         s = script_spec__new(spec, ops);
178         if (!s)
179                 goto out_delete_spec;
180
181         script_spec__add(s);
182
183         return s;
184
185 out_delete_spec:
186         script_spec__delete(s);
187
188         return NULL;
189 }
190
191 int script_spec_register(const char *spec, struct scripting_ops *ops)
192 {
193         struct script_spec *s;
194
195         s = script_spec__find(spec);
196         if (s)
197                 return -1;
198
199         s = script_spec__findnew(spec, ops);
200         if (!s)
201                 return -1;
202
203         return 0;
204 }
205
206 static struct scripting_ops *script_spec__lookup(const char *spec)
207 {
208         struct script_spec *s = script_spec__find(spec);
209         if (!s)
210                 return NULL;
211
212         return s->ops;
213 }
214
215 static void list_available_languages(void)
216 {
217         struct script_spec *s;
218
219         fprintf(stderr, "\n");
220         fprintf(stderr, "Scripting language extensions (used in "
221                 "perf trace -s [spec:]script.[spec]):\n\n");
222
223         list_for_each_entry(s, &script_specs, node)
224                 fprintf(stderr, "  %-42s [%s]\n", s->spec, s->ops->name);
225
226         fprintf(stderr, "\n");
227 }
228
229 static int parse_scriptname(const struct option *opt __used,
230                             const char *str, int unset __used)
231 {
232         char spec[PATH_MAX];
233         const char *script, *ext;
234         int len;
235
236         if (strcmp(str, "list") == 0) {
237                 list_available_languages();
238                 return 0;
239         }
240
241         script = strchr(str, ':');
242         if (script) {
243                 len = script - str;
244                 if (len >= PATH_MAX) {
245                         fprintf(stderr, "invalid language specifier");
246                         return -1;
247                 }
248                 strncpy(spec, str, len);
249                 spec[len] = '\0';
250                 scripting_ops = script_spec__lookup(spec);
251                 if (!scripting_ops) {
252                         fprintf(stderr, "invalid language specifier");
253                         return -1;
254                 }
255                 script++;
256         } else {
257                 script = str;
258                 ext = strchr(script, '.');
259                 if (!ext) {
260                         fprintf(stderr, "invalid script extension");
261                         return -1;
262                 }
263                 scripting_ops = script_spec__lookup(++ext);
264                 if (!scripting_ops) {
265                         fprintf(stderr, "invalid script extension");
266                         return -1;
267                 }
268         }
269
270         script_name = strdup(script);
271
272         return 0;
273 }
274
275 static const char * const annotate_usage[] = {
276         "perf trace [<options>] <command>",
277         NULL
278 };
279
280 static const struct option options[] = {
281         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
282                     "dump raw trace in ASCII"),
283         OPT_BOOLEAN('v', "verbose", &verbose,
284                     "be more verbose (show symbol address, etc)"),
285         OPT_BOOLEAN('l', "latency", &latency_format,
286                     "show latency attributes (irqs/preemption disabled, etc)"),
287         OPT_CALLBACK('s', "script", NULL, "name",
288                      "script file name (lang:script name, script name, or *)",
289                      parse_scriptname),
290         OPT_STRING('g', "gen-script", &generate_script_lang, "lang",
291                    "generate perf-trace.xx script in specified language"),
292
293         OPT_END()
294 };
295
296 int cmd_trace(int argc, const char **argv, const char *prefix __used)
297 {
298         int err;
299         struct perf_session *session;
300
301         symbol__init(0);
302
303         setup_scripting();
304
305         argc = parse_options(argc, argv, options, annotate_usage, 0);
306         if (argc) {
307                 /*
308                  * Special case: if there's an argument left then assume tha
309                  * it's a symbol filter:
310                  */
311                 if (argc > 1)
312                         usage_with_options(annotate_usage, options);
313         }
314
315         setup_pager();
316
317         session = perf_session__new(input_name, O_RDONLY, 0, NULL);
318         if (session == NULL)
319                 return -ENOMEM;
320
321         if (generate_script_lang) {
322                 struct stat perf_stat;
323
324                 int input = open(input_name, O_RDONLY);
325                 if (input < 0) {
326                         perror("failed to open file");
327                         exit(-1);
328                 }
329
330                 err = fstat(input, &perf_stat);
331                 if (err < 0) {
332                         perror("failed to stat file");
333                         exit(-1);
334                 }
335
336                 if (!perf_stat.st_size) {
337                         fprintf(stderr, "zero-sized file, nothing to do!\n");
338                         exit(0);
339                 }
340
341                 scripting_ops = script_spec__lookup(generate_script_lang);
342                 if (!scripting_ops) {
343                         fprintf(stderr, "invalid language specifier");
344                         return -1;
345                 }
346
347                 perf_header__read(&session->header, input);
348                 err = scripting_ops->generate_script("perf-trace");
349                 goto out;
350         }
351
352         if (script_name) {
353                 err = scripting_ops->start_script(script_name);
354                 if (err)
355                         goto out;
356         }
357
358         err = __cmd_trace(session);
359
360         perf_session__delete(session);
361         cleanup_scripting();
362 out:
363         return err;
364 }