f6c20c9c8dee3487dd480bfa37d6bb0cb570d2b4
[lttngtop.git] / src / common.c
1 /*
2 * Copyright (C) 2011-2012 Julien Desfossez
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 */
17
18 #include <babeltrace/ctf/events.h>
19 #include <stdlib.h>
20 #include <linux/unistd.h>
21 #include <string.h>
22 #include "common.h"
23
24 uint64_t get_cpu_id(const struct bt_ctf_event *event)
25 {
26 const struct bt_definition *scope;
27 uint64_t cpu_id;
28
29 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
30 cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(event, scope, "cpu_id"));
31 if (bt_ctf_field_get_error()) {
32 fprintf(stderr, "[error] get cpu_id\n");
33 return -1ULL;
34 }
35
36 return cpu_id;
37 }
38
39 uint64_t get_context_tid(const struct bt_ctf_event *event)
40 {
41 const struct bt_definition *scope;
42 uint64_t tid;
43
44 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
45 tid = bt_ctf_get_int64(bt_ctf_get_field(event,
46 scope, "_tid"));
47 if (bt_ctf_field_get_error()) {
48 fprintf(stderr, "Missing tid context info\n");
49 return -1ULL;
50 }
51
52 return tid;
53 }
54
55 uint64_t get_context_pid(const struct bt_ctf_event *event)
56 {
57 const struct bt_definition *scope;
58 uint64_t pid;
59
60 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
61 pid = bt_ctf_get_int64(bt_ctf_get_field(event,
62 scope, "_pid"));
63 if (bt_ctf_field_get_error()) {
64 fprintf(stderr, "Missing pid context info\n");
65 return -1ULL;
66 }
67
68 return pid;
69 }
70
71 uint64_t get_context_ppid(const struct bt_ctf_event *event)
72 {
73 const struct bt_definition *scope;
74 uint64_t ppid;
75
76 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
77 ppid = bt_ctf_get_int64(bt_ctf_get_field(event,
78 scope, "_ppid"));
79 if (bt_ctf_field_get_error()) {
80 fprintf(stderr, "Missing ppid context info\n");
81 return -1ULL;
82 }
83
84 return ppid;
85 }
86
87 uint64_t get_context_vtid(const struct bt_ctf_event *event)
88 {
89 const struct definition *scope;
90 uint64_t vtid;
91
92 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
93 vtid = bt_ctf_get_int64(bt_ctf_get_field(event,
94 scope, "_vtid"));
95 if (bt_ctf_field_get_error()) {
96 return -1ULL;
97 }
98
99 return vtid;
100 }
101
102 uint64_t get_context_vpid(const struct bt_ctf_event *event)
103 {
104 const struct definition *scope;
105 uint64_t vpid;
106
107 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
108 vpid = bt_ctf_get_int64(bt_ctf_get_field(event,
109 scope, "_vpid"));
110 if (bt_ctf_field_get_error()) {
111 return -1ULL;
112 }
113
114 return vpid;
115 }
116
117 uint64_t get_context_vppid(const struct bt_ctf_event *event)
118 {
119 const struct definition *scope;
120 uint64_t vppid;
121
122 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
123 vppid = bt_ctf_get_int64(bt_ctf_get_field(event,
124 scope, "_vppid"));
125 if (bt_ctf_field_get_error()) {
126 return -1ULL;
127 }
128
129 return vppid;
130 }
131
132 char *get_context_comm(const struct bt_ctf_event *event)
133 {
134 const struct bt_definition *scope;
135 char *comm;
136
137 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
138 comm = bt_ctf_get_char_array(bt_ctf_get_field(event,
139 scope, "_procname"));
140 if (bt_ctf_field_get_error()) {
141 fprintf(stderr, "Missing comm context info\n");
142 return NULL;
143 }
144
145 return comm;
146 }
147
148 char *get_context_hostname(const struct bt_ctf_event *event)
149 {
150 const struct definition *scope;
151 char *hostname;
152
153 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
154 hostname = bt_ctf_get_char_array(bt_ctf_get_field(event,
155 scope, "_hostname"));
156 if (bt_ctf_field_get_error()) {
157 return NULL;
158 }
159
160 return hostname;
161 }
162
163 /*
164 * To get the parent process, put the pid in the tid field
165 * because the parent process gets pid = tid
166 */
167 struct processtop *find_process_tid(struct lttngtop *ctx, int tid, char *comm)
168 {
169 struct processtop *tmp;
170
171 tmp = g_hash_table_lookup(ctx->process_hash_table,
172 (gconstpointer) (unsigned long) tid);
173
174 return tmp;
175 }
176
177 struct processtop* add_proc(struct lttngtop *ctx, int tid, char *comm,
178 unsigned long timestamp)
179 {
180 struct processtop *newproc;
181
182 /* if the PID already exists, we just rename the process */
183 /* FIXME : need to integrate with clone/fork/exit to be accurate */
184 newproc = find_process_tid(ctx, tid, comm);
185
186 if (!newproc) {
187 newproc = g_new0(struct processtop, 1);
188 newproc->tid = tid;
189 newproc->birth = timestamp;
190 newproc->process_files_table = g_ptr_array_new();
191 newproc->files_history = NULL;
192 newproc->totalfileread = 0;
193 newproc->totalfilewrite = 0;
194 newproc->fileread = 0;
195 newproc->filewrite = 0;
196 newproc->syscall_info = NULL;
197 newproc->threadparent = NULL;
198 newproc->threads = g_ptr_array_new();
199 newproc->perf = g_hash_table_new(g_str_hash, g_str_equal);
200 g_ptr_array_add(ctx->process_table, newproc);
201 g_hash_table_insert(ctx->process_hash_table,
202 (gpointer) (unsigned long) tid, newproc);
203
204 ctx->nbnewthreads++;
205 ctx->nbthreads++;
206 }
207 newproc->comm = strdup(comm);
208
209 return newproc;
210 }
211
212 struct processtop* update_proc(struct processtop* proc, int pid, int tid,
213 int ppid, int vpid, int vtid, int vppid, char *comm, char *hostname)
214 {
215 if (proc) {
216 proc->pid = pid;
217 proc->tid = tid;
218 proc->ppid = ppid;
219 proc->vpid = vpid;
220 proc->vtid = vtid;
221 proc->vppid = vppid;
222 if (strcmp(proc->comm, comm) != 0) {
223 free(proc->comm);
224 proc->comm = strdup(comm);
225 }
226 if (hostname) {
227 if (proc->hostname && strcmp(proc->hostname, hostname) != 0) {
228 free(proc->hostname);
229 }
230 proc->hostname = strdup(hostname);
231 }
232 }
233 return proc;
234 }
235
236 /*
237 * This function just sets the time of death of a process.
238 * When we rotate the cputime we remove it from the process list.
239 */
240 void death_proc(struct lttngtop *ctx, int tid, char *comm,
241 unsigned long timestamp)
242 {
243 struct processtop *tmp;
244 tmp = find_process_tid(ctx, tid, comm);
245
246 g_hash_table_remove(ctx->process_hash_table,
247 (gpointer) (unsigned long) tid);
248 if (tmp && strcmp(tmp->comm, comm) == 0) {
249 tmp->death = timestamp;
250 ctx->nbdeadthreads++;
251 ctx->nbthreads--;
252 }
253 }
254
255 struct processtop* get_proc(struct lttngtop *ctx, int tid, char *comm,
256 unsigned long timestamp)
257 {
258 struct processtop *tmp;
259 tmp = find_process_tid(ctx, tid, comm);
260 if (tmp && strcmp(tmp->comm, comm) == 0)
261 return tmp;
262 return add_proc(ctx, tid, comm, timestamp);
263 }
264
265 struct processtop *get_proc_pid(struct lttngtop *ctx, int tid, int pid,
266 unsigned long timestamp)
267 {
268 struct processtop *tmp;
269 tmp = find_process_tid(ctx, tid, NULL);
270 if (tmp && tmp->pid == pid)
271 return tmp;
272 return add_proc(ctx, tid, "Unknown", timestamp);
273 }
274
275 void add_thread(struct processtop *parent, struct processtop *thread)
276 {
277 gint i;
278 struct processtop *tmp;
279
280 if (!parent)
281 return;
282
283 for (i = 0; i < parent->threads->len; i++) {
284 tmp = g_ptr_array_index(parent->threads, i);
285 if (tmp == thread)
286 return;
287 }
288 g_ptr_array_add(parent->threads, thread);
289 }
290
291 struct cputime* add_cpu(int cpu)
292 {
293 struct cputime *newcpu;
294
295 newcpu = g_new0(struct cputime, 1);
296 newcpu->id = cpu;
297 newcpu->current_task = NULL;
298 newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
299
300 g_ptr_array_add(lttngtop.cpu_table, newcpu);
301
302 return newcpu;
303 }
304 struct cputime* get_cpu(int cpu)
305 {
306 gint i;
307 struct cputime *tmp;
308
309 for (i = 0; i < lttngtop.cpu_table->len; i++) {
310 tmp = g_ptr_array_index(lttngtop.cpu_table, i);
311 if (tmp->id == cpu)
312 return tmp;
313 }
314
315 return add_cpu(cpu);
316 }
317
318 /*
319 * At the end of a sampling period, we need to display the cpu time for each
320 * process and to reset it to zero for the next period
321 */
322 void rotate_cputime(unsigned long end)
323 {
324 gint i;
325 struct cputime *tmp;
326 unsigned long elapsed;
327
328 for (i = 0; i < lttngtop.cpu_table->len; i++) {
329 tmp = g_ptr_array_index(lttngtop.cpu_table, i);
330 elapsed = end - tmp->task_start;
331 if (tmp->current_task) {
332 tmp->current_task->totalcpunsec += elapsed;
333 tmp->current_task->threadstotalcpunsec += elapsed;
334 if (tmp->current_task->pid != tmp->current_task->tid &&
335 tmp->current_task->threadparent) {
336 tmp->current_task->threadparent->threadstotalcpunsec += elapsed;
337 }
338 }
339 tmp->task_start = end;
340 }
341 }
342
343 void reset_perf_counter(gpointer key, gpointer value, gpointer user_data)
344 {
345 ((struct perfcounter*) value)->count = 0;
346 }
347
348 void copy_perf_counter(gpointer key, gpointer value, gpointer new_table)
349 {
350 struct perfcounter *newperf;
351
352 newperf = g_new0(struct perfcounter, 1);
353 newperf->count = ((struct perfcounter *) value)->count;
354 newperf->visible = ((struct perfcounter *) value)->visible;
355 newperf->sort = ((struct perfcounter *) value)->sort;
356 g_hash_table_insert((GHashTable *) new_table, strdup(key), newperf);
357 }
358
359 void copy_process_table(gpointer key, gpointer value, gpointer new_table)
360 {
361 g_hash_table_insert((GHashTable *) new_table, key, value);
362 }
363
364 void rotate_perfcounter() {
365 int i;
366 struct processtop *tmp;
367 for (i = 0; i < lttngtop.process_table->len; i++) {
368 tmp = g_ptr_array_index(lttngtop.process_table, i);
369 g_hash_table_foreach(tmp->perf, reset_perf_counter, NULL);
370 }
371 }
372
373 void cleanup_processtop()
374 {
375 gint i, j;
376 struct processtop *tmp;
377 struct files *tmpf; /* a temporary file */
378
379 for (i = 0; i < lttngtop.process_table->len; i++) {
380 tmp = g_ptr_array_index(lttngtop.process_table, i);
381 tmp->totalcpunsec = 0;
382 tmp->threadstotalcpunsec = 0;
383 tmp->fileread = 0;
384 tmp->filewrite = 0;
385
386 for (j = 0; j < tmp->process_files_table->len; j++) {
387 tmpf = g_ptr_array_index(tmp->process_files_table, j);
388 if (tmpf != NULL) {
389 tmpf->read = 0;
390 tmpf->write = 0;
391
392 if (tmpf->flag == __NR_close)
393 g_ptr_array_index(
394 tmp->process_files_table, j
395 ) = NULL;
396 }
397 }
398 }
399 }
400
401 void reset_global_counters()
402 {
403 lttngtop.nbnewproc = 0;
404 lttngtop.nbdeadproc = 0;
405 lttngtop.nbnewthreads = 0;
406 lttngtop.nbdeadthreads = 0;
407 lttngtop.nbnewfiles = 0;
408 lttngtop.nbclosedfiles = 0;
409 }
410
411 void copy_global_counters(struct lttngtop *dst)
412 {
413 dst->nbproc = lttngtop.nbproc;
414 dst->nbnewproc = lttngtop.nbnewproc;
415 dst->nbdeadproc = lttngtop.nbdeadproc;
416 dst->nbthreads = lttngtop.nbthreads;
417 dst->nbnewthreads = lttngtop.nbnewthreads;
418 dst->nbdeadthreads = lttngtop.nbdeadthreads;
419 dst->nbfiles = lttngtop.nbfiles;
420 dst->nbnewfiles = lttngtop.nbnewfiles;
421 dst->nbclosedfiles = lttngtop.nbclosedfiles;
422 reset_global_counters();
423 }
424
425 struct lttngtop* get_copy_lttngtop(unsigned long start, unsigned long end)
426 {
427 gint i, j;
428 unsigned long time;
429 struct lttngtop *dst;
430 struct processtop *tmp, *tmp2, *new;
431 struct cputime *tmpcpu, *newcpu;
432 struct files *tmpfile, *newfile;
433
434 dst = g_new0(struct lttngtop, 1);
435 dst->start = start;
436 dst->end = end;
437 copy_global_counters(dst);
438 dst->process_table = g_ptr_array_new();
439 dst->files_table = g_ptr_array_new();
440 dst->cpu_table = g_ptr_array_new();
441 dst->process_hash_table = g_hash_table_new(g_direct_hash, g_direct_equal);
442 g_hash_table_foreach(lttngtop.process_hash_table, copy_process_table,
443 dst->process_hash_table);
444
445 rotate_cputime(end);
446
447 for (i = 0; i < lttngtop.process_table->len; i++) {
448 tmp = g_ptr_array_index(lttngtop.process_table, i);
449 new = g_new0(struct processtop, 1);
450
451 memcpy(new, tmp, sizeof(struct processtop));
452 new->threads = g_ptr_array_new();
453 new->comm = strdup(tmp->comm);
454 new->process_files_table = g_ptr_array_new();
455 new->files_history = tmp->files_history;
456 new->perf = g_hash_table_new(g_str_hash, g_str_equal);
457 g_hash_table_foreach(tmp->perf, copy_perf_counter, new->perf);
458
459 /* compute the stream speed */
460 if (end - start != 0) {
461 time = (end - start) / NSEC_PER_SEC;
462 new->fileread = new->fileread/(time);
463 new->filewrite = new->filewrite/(time);
464 }
465
466 for (j = 0; j < tmp->process_files_table->len; j++) {
467 tmpfile = g_ptr_array_index(tmp->process_files_table, j);
468
469 newfile = malloc(sizeof(struct files));
470
471 if (tmpfile != NULL) {
472 memcpy(newfile, tmpfile, sizeof(struct files));
473 newfile->name = strdup(tmpfile->name);
474 newfile->ref = new;
475 g_ptr_array_add(new->process_files_table,
476 newfile);
477 g_ptr_array_add(dst->files_table, newfile);
478 } else {
479 g_ptr_array_add(new->process_files_table, NULL);
480 g_ptr_array_add(dst->files_table, NULL);
481 }
482 /*
483 * if the process died during the last period, we remove all
484 * files associated with if after the copy
485 */
486 if (tmp->death > 0 && tmp->death < end) {
487 /* FIXME : close the files before */
488 g_ptr_array_remove(tmp->process_files_table, tmpfile);
489 g_free(tmpfile);
490 }
491 }
492 g_ptr_array_add(dst->process_table, new);
493
494 /*
495 * if the process died during the last period, we remove it from
496 * the current process list after the copy
497 */
498 if (tmp->death > 0 && tmp->death < end) {
499 g_ptr_array_remove(lttngtop.process_table, tmp);
500 /* FIXME : TRUE does not mean clears the object in it */
501 g_ptr_array_free(tmp->threads, TRUE);
502 free(tmp->comm);
503 g_ptr_array_free(tmp->process_files_table, TRUE);
504 /* FIXME : clear elements */
505 g_hash_table_destroy(tmp->perf);
506 g_free(tmp);
507 }
508 }
509 rotate_perfcounter();
510
511 for (i = 0; i < lttngtop.cpu_table->len; i++) {
512 tmpcpu = g_ptr_array_index(lttngtop.cpu_table, i);
513 newcpu = g_new0(struct cputime, 1);
514 memcpy(newcpu, tmpcpu, sizeof(struct cputime));
515 newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
516 g_hash_table_foreach(tmpcpu->perf, copy_perf_counter, newcpu->perf);
517 /*
518 * note : we don't care about the current process pointer in the copy
519 * so the reference is invalid after the memcpy
520 */
521 g_ptr_array_add(dst->cpu_table, newcpu);
522 }
523 /* FIXME : better algo */
524 /* create the threads index if required */
525 for (i = 0; i < dst->process_table->len; i++) {
526 tmp = g_ptr_array_index(dst->process_table, i);
527 if (tmp->pid == tmp->tid) {
528 for (j = 0; j < dst->process_table->len; j++) {
529 tmp2 = g_ptr_array_index(dst->process_table, j);
530 if (tmp2->pid == tmp->pid) {
531 tmp2->threadparent = tmp;
532 g_ptr_array_add(tmp->threads, tmp2);
533 }
534 }
535 }
536 }
537
538 // update_global_stats(dst);
539 cleanup_processtop();
540
541 return dst;
542 }
543
544
545 enum bt_cb_ret handle_statedump_process_state(struct bt_ctf_event *call_data,
546 void *private_data)
547 {
548 const struct bt_definition *scope;
549 struct processtop *proc;
550 unsigned long timestamp;
551 int64_t pid, tid, ppid, vtid, vpid, vppid;
552 char *procname;
553
554 timestamp = bt_ctf_get_timestamp(call_data);
555 if (timestamp == -1ULL)
556 goto error;
557
558 scope = bt_ctf_get_top_level_scope(call_data,
559 BT_EVENT_FIELDS);
560 pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
561 scope, "_pid"));
562 if (bt_ctf_field_get_error()) {
563 fprintf(stderr, "Missing pid context info\n");
564 goto error;
565 }
566 ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
567 scope, "_ppid"));
568 if (bt_ctf_field_get_error()) {
569 fprintf(stderr, "Missing ppid context info\n");
570 goto error;
571 }
572 tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
573 scope, "_tid"));
574 if (bt_ctf_field_get_error()) {
575 fprintf(stderr, "Missing tid context info\n");
576 goto error;
577 }
578 vtid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
579 scope, "_vtid"));
580 if (bt_ctf_field_get_error()) {
581 fprintf(stderr, "Missing vtid context info\n");
582 goto error;
583 }
584 vpid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
585 scope, "_vpid"));
586 if (bt_ctf_field_get_error()) {
587 fprintf(stderr, "Missing vpid context info\n");
588 goto error;
589 }
590 vppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
591 scope, "_vppid"));
592 if (bt_ctf_field_get_error()) {
593 fprintf(stderr, "Missing vppid context info\n");
594 goto error;
595 }
596
597 scope = bt_ctf_get_top_level_scope(call_data,
598 BT_EVENT_FIELDS);
599 procname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
600 scope, "_name"));
601 if (bt_ctf_field_get_error()) {
602 fprintf(stderr, "Missing process name context info\n");
603 goto error;
604 }
605
606 proc = find_process_tid(&lttngtop, tid, procname);
607 if (proc == NULL)
608 proc = add_proc(&lttngtop, tid, procname, timestamp);
609 update_proc(proc, pid, tid, ppid, vpid, vtid, vppid, procname, NULL);
610
611 if (proc) {
612 free(proc->comm);
613 proc->comm = strdup(procname);
614 proc->pid = pid;
615 }
616
617 return BT_CB_OK;
618
619 error:
620 return BT_CB_ERROR_STOP;
621 }
622
623 struct tm format_timestamp(uint64_t timestamp)
624 {
625 struct tm tm;
626 uint64_t ts_sec = 0, ts_nsec;
627 time_t time_s;
628
629 ts_nsec = timestamp;
630 ts_sec += ts_nsec / NSEC_PER_SEC;
631 ts_nsec = ts_nsec % NSEC_PER_SEC;
632
633 time_s = (time_t) ts_sec;
634
635 localtime_r(&time_s, &tm);
636
637 return tm;
638 }
639
640 int *lookup_tid_list(int tid)
641 {
642 return g_hash_table_lookup(tid_list, (gpointer) &tid);
643 }
644
645 char *lookup_hostname_list(const char *hostname)
646 {
647 if (!hostname)
648 return NULL;
649
650 return g_hash_table_lookup(hostname_list, (gpointer) hostname);
651 }
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