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, char *hostname)
 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                 if (lookup_tid_list(tid)) {
 204                         add_filter_tid_list(tid, newproc);
 205                 }
 206                 ctx->nbnewthreads++;
 207                 ctx->nbthreads++;
 208         }
 209         newproc->comm = strdup(comm);
 210         if (hostname) {
 211                 if (newproc->hostname && strcmp(newproc->hostname, hostname) != 0) {
 212                         free(newproc->hostname);
 213                 }
 214                 newproc->hostname = strdup(hostname);
 215                 if (is_hostname_filtered(hostname)) {
 216                         add_filter_tid_list(tid, newproc);
 217                 }
 218         }
 219
 220         return newproc;
 221 }
 222
 223 struct processtop* update_proc(struct processtop* proc, int pid, int tid,
 224                 int ppid, int vpid, int vtid, int vppid, char *comm, char *hostname)
 225 {
 226         if (proc) {
 227                 proc->pid = pid;
 228                 proc->tid = tid;
 229                 proc->ppid = ppid;
 230                 proc->vpid = vpid;
 231                 proc->vtid = vtid;
 232                 proc->vppid = vppid;
 233                 if (strcmp(proc->comm, comm) != 0) {
 234                         free(proc->comm);
 235                         proc->comm = strdup(comm);
 236                 }
 237                 if (hostname && !proc->hostname) {
 238                         proc->hostname = strdup(hostname);
 239                         if (is_hostname_filtered(hostname)) {
 240                                 add_filter_tid_list(tid, proc);
 241                         }
 242                 }
 243         }
 244         return proc;
 245 }
 246
 247 /*
 248  * This function just sets the time of death of a process.
 249  * When we rotate the cputime we remove it from the process list.
 250  */
 251 void death_proc(struct lttngtop *ctx, int tid, char *comm,
 252                 unsigned long timestamp)
 253 {
 254         struct processtop *tmp;
 255         tmp = find_process_tid(ctx, tid, comm);
 256
 257         g_hash_table_remove(ctx->process_hash_table,
 258                         (gpointer) (unsigned long) tid);
 259         if (tmp && strcmp(tmp->comm, comm) == 0) {
 260                 tmp->death = timestamp;
 261                 ctx->nbdeadthreads++;
 262                 ctx->nbthreads--;
 263         }
 264 }
 265
 266 struct processtop* get_proc(struct lttngtop *ctx, int tid, char *comm,
 267                 unsigned long timestamp, char *hostname)
 268 {
 269         struct processtop *tmp;
 270
 271         tmp = find_process_tid(ctx, tid, comm);
 272         if (tmp && strcmp(tmp->comm, comm) == 0) {
 273                 return tmp;
 274         }
 275         return add_proc(ctx, tid, comm, timestamp, hostname);
 276 }
 277
 278 struct processtop *get_proc_pid(struct lttngtop *ctx, int tid, int pid,
 279                 unsigned long timestamp, char *hostname)
 280 {
 281         struct processtop *tmp;
 282         tmp = find_process_tid(ctx, tid, NULL);
 283         if (tmp && tmp->pid == pid)
 284                 return tmp;
 285         return add_proc(ctx, tid, "Unknown", timestamp, hostname);
 286 }
 287
 288 void add_thread(struct processtop *parent, struct processtop *thread)
 289 {
 290         gint i;
 291         struct processtop *tmp;
 292
 293         if (!parent)
 294                 return;
 295
 296         for (i = 0; i < parent->threads->len; i++) {
 297                 tmp = g_ptr_array_index(parent->threads, i);
 298                 if (tmp == thread)
 299                         return;
 300         }
 301         g_ptr_array_add(parent->threads, thread);
 302 }
 303
 304 struct cputime* add_cpu(int cpu)
 305 {
 306         struct cputime *newcpu;
 307
 308         newcpu = g_new0(struct cputime, 1);
 309         newcpu->id = cpu;
 310         newcpu->current_task = NULL;
 311         newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
 312
 313         g_ptr_array_add(lttngtop.cpu_table, newcpu);
 314
 315         return newcpu;
 316 }
 317 struct cputime* get_cpu(int cpu)
 318 {
 319         gint i;
 320         struct cputime *tmp;
 321
 322         for (i = 0; i < lttngtop.cpu_table->len; i++) {
 323                 tmp = g_ptr_array_index(lttngtop.cpu_table, i);
 324                 if (tmp->id == cpu)
 325                         return tmp;
 326         }
 327
 328         return add_cpu(cpu);
 329 }
 330
 331 /*
 332  * At the end of a sampling period, we need to display the cpu time for each
 333  * process and to reset it to zero for the next period
 334  */
 335 void rotate_cputime(unsigned long end)
 336 {
 337         gint i;
 338         struct cputime *tmp;
 339         unsigned long elapsed;
 340
 341         for (i = 0; i < lttngtop.cpu_table->len; i++) {
 342                 tmp = g_ptr_array_index(lttngtop.cpu_table, i);
 343                 elapsed = end - tmp->task_start;
 344                 if (tmp->current_task) {
 345                         tmp->current_task->totalcpunsec += elapsed;
 346                         tmp->current_task->threadstotalcpunsec += elapsed;
 347                         if (tmp->current_task->pid != tmp->current_task->tid &&
 348                                         tmp->current_task->threadparent) {
 349                                 tmp->current_task->threadparent->threadstotalcpunsec += elapsed;
 350                         }
 351                 }
 352                 tmp->task_start = end;
 353         }
 354 }
 355
 356 void reset_perf_counter(gpointer key, gpointer value, gpointer user_data)
 357 {
 358         ((struct perfcounter*) value)->count = 0;
 359 }
 360
 361 void copy_perf_counter(gpointer key, gpointer value, gpointer new_table)
 362 {
 363         struct perfcounter *newperf;
 364
 365         newperf = g_new0(struct perfcounter, 1);
 366         newperf->count = ((struct perfcounter *) value)->count;
 367         newperf->visible = ((struct perfcounter *) value)->visible;
 368         newperf->sort = ((struct perfcounter *) value)->sort;
 369         g_hash_table_insert((GHashTable *) new_table, strdup(key), newperf);
 370 }
 371
 372 void copy_process_table(gpointer key, gpointer value, gpointer new_table)
 373 {
 374         g_hash_table_insert((GHashTable *) new_table, key, value);
 375 }
 376
 377 void rotate_perfcounter() {
 378         int i;
 379         struct processtop *tmp;
 380         for (i = 0; i < lttngtop.process_table->len; i++) {
 381                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 382                 g_hash_table_foreach(tmp->perf, reset_perf_counter, NULL);
 383         }
 384 }
 385
 386 void cleanup_processtop()
 387 {
 388         gint i, j;
 389         struct processtop *tmp;
 390         struct files *tmpf; /* a temporary file */
 391
 392         for (i = 0; i < lttngtop.process_table->len; i++) {
 393                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 394                 tmp->totalcpunsec = 0;
 395                 tmp->threadstotalcpunsec = 0;
 396                 tmp->fileread = 0;
 397                 tmp->filewrite = 0;
 398
 399                 for (j = 0; j < tmp->process_files_table->len; j++) {
 400                         tmpf = g_ptr_array_index(tmp->process_files_table, j);
 401                         if (tmpf != NULL) {
 402                                 tmpf->read = 0;
 403                                 tmpf->write = 0;
 404
 405                                 if (tmpf->flag == __NR_close)
 406                                         g_ptr_array_index(
 407                                                 tmp->process_files_table, j
 408                                         ) = NULL;
 409                         }
 410                 }
 411         }
 412 }
 413
 414 void reset_global_counters()
 415 {
 416         lttngtop.nbnewproc = 0;
 417         lttngtop.nbdeadproc = 0;
 418         lttngtop.nbnewthreads = 0;
 419         lttngtop.nbdeadthreads = 0;
 420         lttngtop.nbnewfiles = 0;
 421         lttngtop.nbclosedfiles = 0;
 422 }
 423
 424 void copy_global_counters(struct lttngtop *dst)
 425 {
 426         dst->nbproc = lttngtop.nbproc;
 427         dst->nbnewproc = lttngtop.nbnewproc;
 428         dst->nbdeadproc = lttngtop.nbdeadproc;
 429         dst->nbthreads = lttngtop.nbthreads;
 430         dst->nbnewthreads = lttngtop.nbnewthreads;
 431         dst->nbdeadthreads = lttngtop.nbdeadthreads;
 432         dst->nbfiles = lttngtop.nbfiles;
 433         dst->nbnewfiles = lttngtop.nbnewfiles;
 434         dst->nbclosedfiles = lttngtop.nbclosedfiles;
 435         reset_global_counters();
 436 }
 437
 438 struct lttngtop* get_copy_lttngtop(unsigned long start, unsigned long end)
 439 {
 440         gint i, j;
 441         unsigned long time;
 442         struct lttngtop *dst;
 443         struct processtop *tmp, *tmp2, *new;
 444         struct cputime *tmpcpu, *newcpu;
 445         struct files *tmpfile, *newfile;
 446         struct kprobes *tmpprobe, *newprobe;
 447
 448         dst = g_new0(struct lttngtop, 1);
 449         dst->start = start;
 450         dst->end = end;
 451         copy_global_counters(dst);
 452         dst->process_table = g_ptr_array_new();
 453         dst->files_table = g_ptr_array_new();
 454         dst->cpu_table = g_ptr_array_new();
 455         dst->kprobes_table = g_ptr_array_new();
 456         dst->process_hash_table = g_hash_table_new(g_direct_hash, g_direct_equal);
 457         g_hash_table_foreach(lttngtop.process_hash_table, copy_process_table,
 458                         dst->process_hash_table);
 459
 460         rotate_cputime(end);
 461
 462         for (i = 0; i < lttngtop.process_table->len; i++) {
 463                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 464                 new = g_new0(struct processtop, 1);
 465
 466                 memcpy(new, tmp, sizeof(struct processtop));
 467                 new->threads = g_ptr_array_new();
 468                 new->comm = strdup(tmp->comm);
 469                 new->process_files_table = g_ptr_array_new();
 470                 new->files_history = tmp->files_history;
 471                 new->perf = g_hash_table_new(g_str_hash, g_str_equal);
 472                 g_hash_table_foreach(tmp->perf, copy_perf_counter, new->perf);
 473
 474                 /* compute the stream speed */
 475                 if (end - start != 0) {
 476                         time = (end - start) / NSEC_PER_SEC;
 477                         new->fileread = new->fileread/(time);
 478                         new->filewrite = new->filewrite/(time);
 479                 }
 480
 481                 for (j = 0; j < tmp->process_files_table->len; j++) {
 482                         tmpfile = g_ptr_array_index(tmp->process_files_table, j);
 483
 484                         newfile = malloc(sizeof(struct files));
 485
 486                         if (tmpfile != NULL) {
 487                                 memcpy(newfile, tmpfile, sizeof(struct files));
 488                                 newfile->name = strdup(tmpfile->name);
 489                                 newfile->ref = new;
 490                                 g_ptr_array_add(new->process_files_table,
 491                                                 newfile);
 492                                 g_ptr_array_add(dst->files_table, newfile);
 493                         } else {
 494                                 g_ptr_array_add(new->process_files_table, NULL);
 495                                 g_ptr_array_add(dst->files_table, NULL);
 496                         }
 497                         /*
 498                          * if the process died during the last period, we remove all
 499                          * files associated with if after the copy
 500                          */
 501                         if (tmp->death > 0 && tmp->death < end) {
 502                                 /* FIXME : close the files before */
 503                                 g_ptr_array_remove(tmp->process_files_table, tmpfile);
 504                                 g_free(tmpfile);
 505                         }
 506                 }
 507                 g_ptr_array_add(dst->process_table, new);
 508
 509                 /*
 510                  * if the process died during the last period, we remove it from
 511                  * the current process list after the copy
 512                  */
 513                 if (tmp->death > 0 && tmp->death < end) {
 514                         g_ptr_array_remove(lttngtop.process_table, tmp);
 515                         /* FIXME : TRUE does not mean clears the object in it */
 516                         g_ptr_array_free(tmp->threads, TRUE);
 517                         free(tmp->comm);
 518                         g_ptr_array_free(tmp->process_files_table, TRUE);
 519                         /* FIXME : clear elements */
 520                         g_hash_table_destroy(tmp->perf);
 521                         g_free(tmp);
 522                 }
 523         }
 524         rotate_perfcounter();
 525
 526         for (i = 0; i < lttngtop.cpu_table->len; i++) {
 527                 tmpcpu = g_ptr_array_index(lttngtop.cpu_table, i);
 528                 newcpu = g_new0(struct cputime, 1);
 529                 memcpy(newcpu, tmpcpu, sizeof(struct cputime));
 530                 newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
 531                 g_hash_table_foreach(tmpcpu->perf, copy_perf_counter, newcpu->perf);
 532                 /*
 533                  * note : we don't care about the current process pointer in the copy
 534                  * so the reference is invalid after the memcpy
 535                  */
 536                 g_ptr_array_add(dst->cpu_table, newcpu);
 537         }
 538         if (lttngtop.kprobes_table) {
 539                 for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 540                         tmpprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 541                         newprobe = g_new0(struct kprobes, 1);
 542                         memcpy(newprobe, tmpprobe, sizeof(struct kprobes));
 543                         tmpprobe->count = 0;
 544                         g_ptr_array_add(dst->kprobes_table, newprobe);
 545                 }
 546         }
 547         /* FIXME : better algo */
 548         /* create the threads index if required */
 549         for (i = 0; i < dst->process_table->len; i++) {
 550                 tmp = g_ptr_array_index(dst->process_table, i);
 551                 if (tmp->pid == tmp->tid) {
 552                         for (j = 0; j < dst->process_table->len; j++) {
 553                                 tmp2 = g_ptr_array_index(dst->process_table, j);
 554                                 if (tmp2->pid == tmp->pid) {
 555                                         tmp2->threadparent = tmp;
 556                                         g_ptr_array_add(tmp->threads, tmp2);
 557                                 }
 558                         }
 559                 }
 560         }
 561
 562         //  update_global_stats(dst);
 563         cleanup_processtop();
 564
 565         return dst;
 566 }
 567
 568
 569 enum bt_cb_ret handle_statedump_process_state(struct bt_ctf_event *call_data,
 570                 void *private_data)
 571 {
 572         const struct bt_definition *scope;
 573         struct processtop *proc;
 574         unsigned long timestamp;
 575         int64_t pid, tid, ppid, vtid, vpid, vppid;
 576         char *procname, *hostname = NULL;
 577
 578         timestamp = bt_ctf_get_timestamp(call_data);
 579         if (timestamp == -1ULL)
 580                 goto error;
 581
 582         scope = bt_ctf_get_top_level_scope(call_data,
 583                          BT_EVENT_FIELDS);
 584         pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 585                              scope, "_pid"));
 586         if (bt_ctf_field_get_error()) {
 587                 fprintf(stderr, "Missing pid context info\n");
 588                 goto error;
 589         }
 590         ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 591                                 scope, "_ppid"));
 592         if (bt_ctf_field_get_error()) {
 593                 fprintf(stderr, "Missing ppid context info\n");
 594                 goto error;
 595         }
 596         tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 597                                 scope, "_tid"));
 598         if (bt_ctf_field_get_error()) {
 599                 fprintf(stderr, "Missing tid context info\n");
 600                 goto error;
 601         }
 602         vtid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 603                                 scope, "_vtid"));
 604         if (bt_ctf_field_get_error()) {
 605                 fprintf(stderr, "Missing vtid context info\n");
 606                 goto error;
 607         }
 608         vpid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 609                                 scope, "_vpid"));
 610         if (bt_ctf_field_get_error()) {
 611                 fprintf(stderr, "Missing vpid context info\n");
 612                 goto error;
 613         }
 614         vppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 615                                 scope, "_vppid"));
 616         if (bt_ctf_field_get_error()) {
 617                 fprintf(stderr, "Missing vppid context info\n");
 618                 goto error;
 619         }
 620
 621         scope = bt_ctf_get_top_level_scope(call_data,
 622                         BT_EVENT_FIELDS);
 623         procname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
 624                                 scope, "_name"));
 625         if (bt_ctf_field_get_error()) {
 626                 fprintf(stderr, "Missing process name context info\n");
 627                 goto error;
 628         }
 629         /*
 630         hostname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
 631                                 scope, "_hostname"));
 632         if (bt_ctf_field_get_error()) {
 633         }
 634         */
 635
 636         proc = find_process_tid(&lttngtop, tid, procname);
 637         if (proc == NULL)
 638                 proc = add_proc(&lttngtop, tid, procname, timestamp, hostname);
 639         update_proc(proc, pid, tid, ppid, vpid, vtid, vppid, procname, hostname);
 640
 641         if (proc) {
 642                 free(proc->comm);
 643                 proc->comm = strdup(procname);
 644                 proc->pid = pid;
 645         }
 646
 647         return BT_CB_OK;
 648
 649 error:
 650         return BT_CB_ERROR_STOP;
 651 }
 652
 653 struct tm format_timestamp(uint64_t timestamp)
 654 {
 655         struct tm tm;
 656         uint64_t ts_sec = 0, ts_nsec;
 657         time_t time_s;
 658
 659         ts_nsec = timestamp;
 660         ts_sec += ts_nsec / NSEC_PER_SEC;
 661         ts_nsec = ts_nsec % NSEC_PER_SEC;
 662
 663         time_s = (time_t) ts_sec;
 664
 665         localtime_r(&time_s, &tm);
 666
 667         return tm;
 668 }
 669
 670 int *lookup_tid_list(int tid)
 671 {
 672         if (!tid_filter_list)
 673                 return NULL;
 674
 675         return g_hash_table_lookup(tid_filter_list, (gpointer) &tid);
 676 }
 677
 678 struct host *lookup_hostname_list(const char *hostname)
 679 {
 680         if (!hostname || !global_host_list)
 681                 return NULL;
 682
 683         return g_hash_table_lookup(global_host_list, (gpointer) hostname);
 684 }
 685
 686 int is_hostname_filtered(const char *hostname)
 687 {
 688         struct host *host;
 689
 690         host = lookup_hostname_list(hostname);
 691         if (host)
 692                 return host->filter;
 693         return 0;
 694 }
 695
 696 int *lookup_filter_tid_list(int tid)
 697 {
 698         return g_hash_table_lookup(global_filter_list, (gpointer) &tid);
 699 }
 700
 701 void add_filter_tid_list(int tid, struct processtop *newproc)
 702 {
 703         unsigned long *hash_tid;
 704
 705         hash_tid = malloc(sizeof(unsigned long));
 706         *hash_tid = tid;
 707         g_hash_table_insert(global_filter_list,
 708                         (gpointer) (unsigned long) hash_tid, newproc);
 709 }
 710
 711 void remove_filter_tid_list(int tid)
 712 {
 713         g_hash_table_remove(global_filter_list,
 714                         (gpointer) (unsigned long) &tid);
 715 }