kprobe support
[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 struct kprobes *tmpprobe, *newprobe;
434
435 dst = g_new0(struct lttngtop, 1);
436 dst->start = start;
437 dst->end = end;
438 copy_global_counters(dst);
439 dst->process_table = g_ptr_array_new();
440 dst->files_table = g_ptr_array_new();
441 dst->cpu_table = g_ptr_array_new();
442 dst->kprobes_table = g_ptr_array_new();
443 dst->process_hash_table = g_hash_table_new(g_direct_hash, g_direct_equal);
444 g_hash_table_foreach(lttngtop.process_hash_table, copy_process_table,
445 dst->process_hash_table);
446
447 rotate_cputime(end);
448
449 for (i = 0; i < lttngtop.process_table->len; i++) {
450 tmp = g_ptr_array_index(lttngtop.process_table, i);
451 new = g_new0(struct processtop, 1);
452
453 memcpy(new, tmp, sizeof(struct processtop));
454 new->threads = g_ptr_array_new();
455 new->comm = strdup(tmp->comm);
456 new->process_files_table = g_ptr_array_new();
457 new->files_history = tmp->files_history;
458 new->perf = g_hash_table_new(g_str_hash, g_str_equal);
459 g_hash_table_foreach(tmp->perf, copy_perf_counter, new->perf);
460
461 /* compute the stream speed */
462 if (end - start != 0) {
463 time = (end - start) / NSEC_PER_SEC;
464 new->fileread = new->fileread/(time);
465 new->filewrite = new->filewrite/(time);
466 }
467
468 for (j = 0; j < tmp->process_files_table->len; j++) {
469 tmpfile = g_ptr_array_index(tmp->process_files_table, j);
470
471 newfile = malloc(sizeof(struct files));
472
473 if (tmpfile != NULL) {
474 memcpy(newfile, tmpfile, sizeof(struct files));
475 newfile->name = strdup(tmpfile->name);
476 newfile->ref = new;
477 g_ptr_array_add(new->process_files_table,
478 newfile);
479 g_ptr_array_add(dst->files_table, newfile);
480 } else {
481 g_ptr_array_add(new->process_files_table, NULL);
482 g_ptr_array_add(dst->files_table, NULL);
483 }
484 /*
485 * if the process died during the last period, we remove all
486 * files associated with if after the copy
487 */
488 if (tmp->death > 0 && tmp->death < end) {
489 /* FIXME : close the files before */
490 g_ptr_array_remove(tmp->process_files_table, tmpfile);
491 g_free(tmpfile);
492 }
493 }
494 g_ptr_array_add(dst->process_table, new);
495
496 /*
497 * if the process died during the last period, we remove it from
498 * the current process list after the copy
499 */
500 if (tmp->death > 0 && tmp->death < end) {
501 g_ptr_array_remove(lttngtop.process_table, tmp);
502 /* FIXME : TRUE does not mean clears the object in it */
503 g_ptr_array_free(tmp->threads, TRUE);
504 free(tmp->comm);
505 g_ptr_array_free(tmp->process_files_table, TRUE);
506 /* FIXME : clear elements */
507 g_hash_table_destroy(tmp->perf);
508 g_free(tmp);
509 }
510 }
511 rotate_perfcounter();
512
513 for (i = 0; i < lttngtop.cpu_table->len; i++) {
514 tmpcpu = g_ptr_array_index(lttngtop.cpu_table, i);
515 newcpu = g_new0(struct cputime, 1);
516 memcpy(newcpu, tmpcpu, sizeof(struct cputime));
517 newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
518 g_hash_table_foreach(tmpcpu->perf, copy_perf_counter, newcpu->perf);
519 /*
520 * note : we don't care about the current process pointer in the copy
521 * so the reference is invalid after the memcpy
522 */
523 g_ptr_array_add(dst->cpu_table, newcpu);
524 }
525 for (i = 0; i < lttngtop.kprobes_table->len; i++) {
526 tmpprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
527 newprobe = g_new0(struct kprobes, 1);
528 memcpy(newprobe, tmpprobe, sizeof(struct kprobes));
529 tmpprobe->count = 0;
530 g_ptr_array_add(dst->kprobes_table, newprobe);
531 }
532 /* FIXME : better algo */
533 /* create the threads index if required */
534 for (i = 0; i < dst->process_table->len; i++) {
535 tmp = g_ptr_array_index(dst->process_table, i);
536 if (tmp->pid == tmp->tid) {
537 for (j = 0; j < dst->process_table->len; j++) {
538 tmp2 = g_ptr_array_index(dst->process_table, j);
539 if (tmp2->pid == tmp->pid) {
540 tmp2->threadparent = tmp;
541 g_ptr_array_add(tmp->threads, tmp2);
542 }
543 }
544 }
545 }
546
547 // update_global_stats(dst);
548 cleanup_processtop();
549
550 return dst;
551 }
552
553
554 enum bt_cb_ret handle_statedump_process_state(struct bt_ctf_event *call_data,
555 void *private_data)
556 {
557 const struct bt_definition *scope;
558 struct processtop *proc;
559 unsigned long timestamp;
560 int64_t pid, tid, ppid, vtid, vpid, vppid;
561 char *procname;
562
563 timestamp = bt_ctf_get_timestamp(call_data);
564 if (timestamp == -1ULL)
565 goto error;
566
567 scope = bt_ctf_get_top_level_scope(call_data,
568 BT_EVENT_FIELDS);
569 pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
570 scope, "_pid"));
571 if (bt_ctf_field_get_error()) {
572 fprintf(stderr, "Missing pid context info\n");
573 goto error;
574 }
575 ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
576 scope, "_ppid"));
577 if (bt_ctf_field_get_error()) {
578 fprintf(stderr, "Missing ppid context info\n");
579 goto error;
580 }
581 tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
582 scope, "_tid"));
583 if (bt_ctf_field_get_error()) {
584 fprintf(stderr, "Missing tid context info\n");
585 goto error;
586 }
587 vtid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
588 scope, "_vtid"));
589 if (bt_ctf_field_get_error()) {
590 fprintf(stderr, "Missing vtid context info\n");
591 goto error;
592 }
593 vpid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
594 scope, "_vpid"));
595 if (bt_ctf_field_get_error()) {
596 fprintf(stderr, "Missing vpid context info\n");
597 goto error;
598 }
599 vppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
600 scope, "_vppid"));
601 if (bt_ctf_field_get_error()) {
602 fprintf(stderr, "Missing vppid context info\n");
603 goto error;
604 }
605
606 scope = bt_ctf_get_top_level_scope(call_data,
607 BT_EVENT_FIELDS);
608 procname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
609 scope, "_name"));
610 if (bt_ctf_field_get_error()) {
611 fprintf(stderr, "Missing process name context info\n");
612 goto error;
613 }
614
615 proc = find_process_tid(&lttngtop, tid, procname);
616 if (proc == NULL)
617 proc = add_proc(&lttngtop, tid, procname, timestamp);
618 update_proc(proc, pid, tid, ppid, vpid, vtid, vppid, procname, NULL);
619
620 if (proc) {
621 free(proc->comm);
622 proc->comm = strdup(procname);
623 proc->pid = pid;
624 }
625
626 return BT_CB_OK;
627
628 error:
629 return BT_CB_ERROR_STOP;
630 }
631
632 struct tm format_timestamp(uint64_t timestamp)
633 {
634 struct tm tm;
635 uint64_t ts_sec = 0, ts_nsec;
636 time_t time_s;
637
638 ts_nsec = timestamp;
639 ts_sec += ts_nsec / NSEC_PER_SEC;
640 ts_nsec = ts_nsec % NSEC_PER_SEC;
641
642 time_s = (time_t) ts_sec;
643
644 localtime_r(&time_s, &tm);
645
646 return tm;
647 }
648
649 int *lookup_tid_list(int tid)
650 {
651 return g_hash_table_lookup(tid_list, (gpointer) &tid);
652 }
653
654 char *lookup_hostname_list(const char *hostname)
655 {
656 if (!hostname)
657 return NULL;
658
659 return g_hash_table_lookup(hostname_list, (gpointer) hostname);
660 }
This page took 0.064908 seconds and 4 git commands to generate.