statedump_process_state & problems patches
[lttngtop.git] / src / lttngtop.c
1 /*
2 * Copyright (C) 2011 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 #define _GNU_SOURCE
19 #include <config.h>
20 #include <stdio.h>
21 #include <stdint.h>
22 #include <babeltrace/babeltrace.h>
23 #include <babeltrace/ctf/events.h>
24 #include <babeltrace/ctf/callbacks.h>
25 #include <babeltrace/ctf/iterator.h>
26 #include <fcntl.h>
27 #include <pthread.h>
28 #include <popt.h>
29 #include <stdlib.h>
30 #include <ftw.h>
31 #include <dirent.h>
32 #include <ctype.h>
33 #include <sys/stat.h>
34 #include <unistd.h>
35 #include <string.h>
36 #include <errno.h>
37 #include <sys/types.h>
38 #include <fts.h>
39 #include <assert.h>
40
41 #include "lttngtoptypes.h"
42 #include "cputop.h"
43 #include "iostreamtop.h"
44 #include "cursesdisplay.h"
45 #include "common.h"
46
47 #define DEFAULT_FILE_ARRAY_SIZE 1
48
49 const char *opt_input_path;
50
51 struct lttngtop *copy;
52 pthread_t display_thread;
53 pthread_t timer_thread;
54
55 unsigned long refresh_display = 1 * NSEC_PER_SEC;
56 unsigned long last_display_update = 0;
57 int quit = 0;
58
59 enum {
60 OPT_NONE = 0,
61 OPT_HELP,
62 OPT_LIST,
63 OPT_VERBOSE,
64 OPT_DEBUG,
65 OPT_NAMES,
66 };
67
68 static struct poptOption long_options[] = {
69 /* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
70 { "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
71 { NULL, 0, 0, NULL, 0, NULL, NULL },
72 };
73
74 void *refresh_thread(void *p)
75 {
76 while (1) {
77 if (quit)
78 return NULL;
79 sem_wait(&pause_sem);
80 sem_post(&pause_sem);
81 sem_post(&timer);
82 sleep(refresh_display/NSEC_PER_SEC);
83 }
84 }
85
86 void *ncurses_display(void *p)
87 {
88 unsigned int current_display_index = 0;
89
90 sem_wait(&bootstrap);
91 init_ncurses();
92
93 while (1) {
94 sem_wait(&timer);
95 sem_wait(&goodtodisplay);
96 sem_wait(&pause_sem);
97
98 copy = g_ptr_array_index(copies, current_display_index);
99 assert(copy);
100 display(current_display_index++);
101
102 sem_post(&goodtoupdate);
103 sem_post(&pause_sem);
104
105 if (quit) {
106 reset_ncurses();
107 pthread_exit(0);
108 }
109 }
110 }
111
112 /*
113 * hook on each event to check the timestamp and refresh the display if
114 * necessary
115 */
116 enum bt_cb_ret check_timestamp(struct bt_ctf_event *call_data, void *private_data)
117 {
118 unsigned long timestamp;
119
120 timestamp = bt_ctf_get_timestamp(call_data);
121 if (timestamp == -1ULL)
122 goto error;
123
124 if (last_display_update == 0)
125 last_display_update = timestamp;
126
127 if (timestamp - last_display_update >= refresh_display) {
128 sem_wait(&goodtoupdate);
129 g_ptr_array_add(copies, get_copy_lttngtop(last_display_update,
130 timestamp));
131 sem_post(&goodtodisplay);
132 sem_post(&bootstrap);
133 last_display_update = timestamp;
134 }
135 return BT_CB_OK;
136
137 error:
138 fprintf(stderr, "check_timestamp callback error\n");
139 return BT_CB_ERROR_STOP;
140 }
141
142 /*
143 * get_perf_counter : get or create and return a perf_counter struct for
144 * either a process or a cpu (only one of the 2 parameters mandatory)
145 */
146 struct perfcounter *get_perf_counter(const char *name, struct processtop *proc,
147 struct cputime *cpu)
148 {
149 struct perfcounter *ret, *global;
150 GHashTable *table;
151
152 if (proc)
153 table = proc->perf;
154 else if (cpu)
155 table = cpu->perf;
156 else
157 goto error;
158
159 ret = g_hash_table_lookup(table, (gpointer) name);
160 if (ret)
161 goto end;
162
163 ret = g_new0(struct perfcounter, 1);
164 /* by default, make it visible in the UI */
165 ret->visible = 1;
166 g_hash_table_insert(table, (gpointer) strdup(name), ret);
167
168 global = g_hash_table_lookup(lttngtop.perf_list, (gpointer) name);
169 if (!global) {
170 global = g_new0(struct perfcounter, 1);
171 memcpy(global, ret, sizeof(struct perfcounter));
172 /* by default, sort on the first perf context */
173 if (g_hash_table_size(lttngtop.perf_list) == 0)
174 global->sort = 1;
175 g_hash_table_insert(lttngtop.perf_list, (gpointer) strdup(name), global);
176 }
177
178 end:
179 return ret;
180
181 error:
182 return NULL;
183 }
184
185 void update_perf_value(struct processtop *proc, struct cputime *cpu,
186 const char *name, int value)
187 {
188 struct perfcounter *cpu_perf, *process_perf;
189
190 cpu_perf = get_perf_counter(name, NULL, cpu);
191 if (cpu_perf->count < value) {
192 process_perf = get_perf_counter(name, proc, NULL);
193 process_perf->count += value - cpu_perf->count;
194 cpu_perf->count = value;
195 }
196 }
197
198 void extract_perf_counter_scope(const struct bt_ctf_event *event,
199 const struct definition *scope,
200 struct processtop *proc,
201 struct cputime *cpu)
202 {
203 struct definition const * const *list = NULL;
204 unsigned int count;
205 int i, ret;
206
207 if (!scope)
208 goto end;
209
210 ret = bt_ctf_get_field_list(event, scope, &list, &count);
211 if (ret < 0)
212 goto end;
213
214 for (i = 0; i < count; i++) {
215 const char *name = bt_ctf_field_name(list[i]);
216 if (strncmp(name, "perf_", 5) == 0) {
217 int value = bt_ctf_get_uint64(list[i]);
218 if (bt_ctf_field_get_error())
219 continue;
220 update_perf_value(proc, cpu, name, value);
221 }
222 }
223
224 end:
225 return;
226 }
227
228 void update_perf_counter(struct processtop *proc, const struct bt_ctf_event *event)
229 {
230 struct cputime *cpu;
231 const struct definition *scope;
232
233 cpu = get_cpu(get_cpu_id(event));
234
235 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_EVENT_CONTEXT);
236 extract_perf_counter_scope(event, scope, proc, cpu);
237
238 scope = bt_ctf_get_top_level_scope(event, BT_STREAM_PACKET_CONTEXT);
239 extract_perf_counter_scope(event, scope, proc, cpu);
240
241 scope = bt_ctf_get_top_level_scope(event, BT_EVENT_CONTEXT);
242 extract_perf_counter_scope(event, scope, proc, cpu);
243 }
244
245 enum bt_cb_ret fix_process_table(struct bt_ctf_event *call_data,
246 void *private_data)
247 {
248 int pid, tid, ppid;
249 char *comm;
250 struct processtop *parent, *child;
251 unsigned long timestamp;
252
253 /* FIXME : display nice error when missing context pid, tid, ppid and comm */
254
255 timestamp = bt_ctf_get_timestamp(call_data);
256 if (timestamp == -1ULL)
257 goto error;
258
259 pid = get_context_pid(call_data);
260 if (pid == -1ULL) {
261 // fprintf(stderr, "Missing pid context info\n");
262 goto error;
263 }
264 tid = get_context_tid(call_data);
265 if (tid == -1ULL) {
266 // fprintf(stderr, "Missing tid context info\n");
267 goto error;
268 }
269 ppid = get_context_ppid(call_data);
270 if (ppid == -1ULL) {
271 // fprintf(stderr, "Missing ppid context info\n");
272 goto error;
273 }
274 comm = get_context_comm(call_data);
275 if (!comm) {
276 // fprintf(stderr, "Missing procname context info\n");
277 goto error;
278 }
279
280 /* find or create the current process */
281 child = find_process_tid(&lttngtop, tid, comm);
282 if (!child)
283 child = add_proc(&lttngtop, tid, comm, timestamp);
284 update_proc(child, pid, tid, ppid, comm);
285
286 if (pid != tid) {
287 /* find or create the parent */
288 parent = find_process_tid(&lttngtop, pid, comm);
289 if (!parent) {
290 parent = add_proc(&lttngtop, pid, comm, timestamp);
291 parent->pid = pid;
292 }
293
294 /* attach the parent to the current process */
295 child->threadparent = parent;
296 add_thread(parent, child);
297 }
298
299 update_perf_counter(child, call_data);
300
301 return BT_CB_OK;
302
303 error:
304 return BT_CB_ERROR_STOP;
305 }
306
307 void init_lttngtop()
308 {
309 copies = g_ptr_array_new();
310 lttngtop.perf_list = g_hash_table_new(g_str_hash, g_str_equal);
311
312 sem_init(&goodtodisplay, 0, 0);
313 sem_init(&goodtoupdate, 0, 1);
314 sem_init(&timer, 0, 1);
315 sem_init(&bootstrap, 0, 0);
316 sem_init(&pause_sem, 0, 1);
317 sem_init(&end_trace_sem, 0, 0);
318
319 reset_global_counters();
320 lttngtop.nbproc = 0;
321 lttngtop.nbthreads = 0;
322 lttngtop.nbfiles = 0;
323
324 lttngtop.process_table = g_ptr_array_new();
325 lttngtop.files_table = g_ptr_array_new();
326 lttngtop.cpu_table = g_ptr_array_new();
327 }
328
329 void usage(FILE *fp)
330 {
331 fprintf(fp, "LTTngTop %s\n\n", VERSION);
332 fprintf(fp, "Usage : lttngtop /path/to/trace\n");
333 }
334
335 /*
336 * Return 0 if caller should continue, < 0 if caller should return
337 * error, > 0 if caller should exit without reporting error.
338 */
339 static int parse_options(int argc, char **argv)
340 {
341 poptContext pc;
342 int opt, ret = 0;
343
344 if (argc == 1) {
345 usage(stdout);
346 return 1; /* exit cleanly */
347 }
348
349 pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
350 poptReadDefaultConfig(pc, 0);
351
352 while ((opt = poptGetNextOpt(pc)) != -1) {
353 switch (opt) {
354 case OPT_HELP:
355 usage(stdout);
356 ret = 1; /* exit cleanly */
357 goto end;
358 case OPT_LIST:
359 // list_formats(stdout);
360 ret = 1;
361 goto end;
362 case OPT_VERBOSE:
363 // babeltrace_verbose = 1;
364 break;
365 case OPT_DEBUG:
366 // babeltrace_debug = 1;
367 break;
368 case OPT_NAMES:
369 // opt_field_names = 1;
370 break;
371 default:
372 ret = -EINVAL;
373 goto end;
374 }
375 }
376
377 opt_input_path = poptGetArg(pc);
378 if (!opt_input_path) {
379 ret = -EINVAL;
380 goto end;
381 }
382 end:
383 if (pc) {
384 poptFreeContext(pc);
385 }
386 return ret;
387 }
388
389 void iter_trace(struct bt_context *bt_ctx)
390 {
391 struct bt_ctf_iter *iter;
392 struct bt_iter_pos begin_pos;
393 const struct bt_ctf_event *event;
394 int ret = 0;
395
396 begin_pos.type = BT_SEEK_BEGIN;
397 iter = bt_ctf_iter_create(bt_ctx, &begin_pos, NULL);
398
399 /* at each event check if we need to refresh */
400 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
401 check_timestamp,
402 NULL, NULL, NULL);
403 /* at each event, verify the status of the process table */
404 bt_ctf_iter_add_callback(iter, 0, NULL, 0,
405 fix_process_table,
406 NULL, NULL, NULL);
407 /* to handle the scheduling events */
408 bt_ctf_iter_add_callback(iter,
409 g_quark_from_static_string("sched_switch"),
410 NULL, 0, handle_sched_switch, NULL, NULL, NULL);
411 /* to clean up the process table */
412 bt_ctf_iter_add_callback(iter,
413 g_quark_from_static_string("sched_process_free"),
414 NULL, 0, handle_sched_process_free, NULL, NULL, NULL);
415 /* to get all the process from the statedumps */
416 bt_ctf_iter_add_callback(iter,
417 g_quark_from_static_string(
418 "lttng_statedump_process_state"),
419 NULL, 0, handle_statedump_process_state,
420 NULL, NULL, NULL);
421
422 /* for IO top */
423 bt_ctf_iter_add_callback(iter,
424 g_quark_from_static_string("exit_syscall"),
425 NULL, 0, handle_exit_syscall, NULL, NULL, NULL);
426 bt_ctf_iter_add_callback(iter,
427 g_quark_from_static_string("sys_write"),
428 NULL, 0, handle_sys_write, NULL, NULL, NULL);
429 bt_ctf_iter_add_callback(iter,
430 g_quark_from_static_string("sys_read"),
431 NULL, 0, handle_sys_read, NULL, NULL, NULL);
432 bt_ctf_iter_add_callback(iter,
433 g_quark_from_static_string("sys_open"),
434 NULL, 0, handle_sys_open, NULL, NULL, NULL);
435 bt_ctf_iter_add_callback(iter,
436 g_quark_from_static_string("sys_close"),
437 NULL, 0, handle_sys_close, NULL, NULL, NULL);
438 bt_ctf_iter_add_callback(iter,
439 g_quark_from_static_string(
440 "lttng_statedump_file_descriptor"),
441 NULL, 0, handle_statedump_file_descriptor,
442 NULL, NULL, NULL);
443
444 while ((event = bt_ctf_iter_read_event(iter)) != NULL) {
445 ret = bt_iter_next(bt_ctf_get_iter(iter));
446 if (ret < 0)
447 goto end_iter;
448 }
449
450 /* block until quit, we reached the end of the trace */
451 sem_wait(&end_trace_sem);
452
453 end_iter:
454 bt_ctf_iter_destroy(iter);
455 }
456
457 /*
458 * bt_context_add_traces_recursive: Open a trace recursively
459 * (copied from BSD code in converter/babeltrace.c)
460 *
461 * Find each trace present in the subdirectory starting from the given
462 * path, and add them to the context. The packet_seek parameter can be
463 * NULL: this specify to use the default format packet_seek.
464 *
465 * Return: 0 on success, nonzero on failure.
466 * Unable to open toplevel: failure.
467 * Unable to open some subdirectory or file: warn and continue;
468 */
469 int bt_context_add_traces_recursive(struct bt_context *ctx, const char *path,
470 const char *format_str,
471 void (*packet_seek)(struct stream_pos *pos,
472 size_t offset, int whence))
473 {
474 FTS *tree;
475 FTSENT *node;
476 GArray *trace_ids;
477 char lpath[PATH_MAX];
478 char * const paths[2] = { lpath, NULL };
479 int ret;
480
481 /*
482 * Need to copy path, because fts_open can change it.
483 * It is the pointer array, not the strings, that are constant.
484 */
485 strncpy(lpath, path, PATH_MAX);
486 lpath[PATH_MAX - 1] = '\0';
487
488 tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
489 if (tree == NULL) {
490 fprintf(stderr, "[error] [Context] Cannot traverse \"%s\" for reading.\n",
491 path);
492 return -EINVAL;
493 }
494
495 trace_ids = g_array_new(FALSE, TRUE, sizeof(int));
496
497 while ((node = fts_read(tree))) {
498 int dirfd, metafd;
499
500 if (!(node->fts_info & FTS_D))
501 continue;
502
503 dirfd = open(node->fts_accpath, 0);
504 if (dirfd < 0) {
505 fprintf(stderr, "[error] [Context] Unable to open trace "
506 "directory file descriptor.\n");
507 ret = dirfd;
508 goto error;
509 }
510 metafd = openat(dirfd, "metadata", O_RDONLY);
511 if (metafd < 0) {
512 ret = close(dirfd);
513 if (ret < 0) {
514 perror("close");
515 goto error;
516 }
517 } else {
518 int trace_id;
519
520 ret = close(metafd);
521 if (ret < 0) {
522 perror("close");
523 goto error;
524 }
525 ret = close(dirfd);
526 if (ret < 0) {
527 perror("close");
528 goto error;
529 }
530
531 trace_id = bt_context_add_trace(ctx,
532 node->fts_accpath, format_str,
533 packet_seek, NULL, NULL);
534 if (trace_id < 0) {
535 fprintf(stderr, "[error] [Context] opening trace \"%s\" from %s "
536 "for reading.\n", node->fts_accpath, path);
537 ret = trace_id;
538 goto error;
539 }
540 g_array_append_val(trace_ids, trace_id);
541 }
542 }
543
544 g_array_free(trace_ids, TRUE);
545 return 0;
546
547 error:
548 return ret;
549 }
550
551 int main(int argc, char **argv)
552 {
553 int ret;
554 struct bt_context *bt_ctx = NULL;
555
556 ret = parse_options(argc, argv);
557 if (ret < 0) {
558 fprintf(stdout, "Error parsing options.\n\n");
559 usage(stdout);
560 exit(EXIT_FAILURE);
561 } else if (ret > 0) {
562 exit(EXIT_SUCCESS);
563 }
564
565 init_lttngtop();
566
567 bt_ctx = bt_context_create();
568 ret = bt_context_add_traces_recursive(bt_ctx, opt_input_path, "ctf", NULL);
569 if (ret < 0) {
570 printf("[error] Opening the trace\n");
571 goto end;
572 }
573
574 pthread_create(&display_thread, NULL, ncurses_display, (void *) NULL);
575 pthread_create(&timer_thread, NULL, refresh_thread, (void *) NULL);
576
577 iter_trace(bt_ctx);
578
579 quit = 1;
580 pthread_join(display_thread, NULL);
581 pthread_join(timer_thread, NULL);
582
583 end:
584 bt_context_put(bt_ctx);
585 return 0;
586 }
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