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 bt_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 bt_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 bt_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 bt_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, const 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         struct host *host;
 182
 183         /* if the PID already exists, we just rename the process */
 184         /* FIXME : need to integrate with clone/fork/exit to be accurate */
 185         newproc = find_process_tid(ctx, tid, comm);
 186
 187         if (!newproc) {
 188                 newproc = g_new0(struct processtop, 1);
 189                 newproc->tid = tid;
 190                 newproc->birth = timestamp;
 191                 newproc->process_files_table = g_ptr_array_new();
 192                 newproc->files_history = NULL;
 193                 newproc->totalfileread = 0;
 194                 newproc->totalfilewrite = 0;
 195                 newproc->fileread = 0;
 196                 newproc->filewrite = 0;
 197                 newproc->syscall_info = NULL;
 198                 newproc->threadparent = NULL;
 199                 newproc->threads = g_ptr_array_new();
 200                 newproc->perf = g_hash_table_new(g_str_hash, g_str_equal);
 201                 g_ptr_array_add(ctx->process_table, newproc);
 202                 g_hash_table_insert(ctx->process_hash_table,
 203                                 (gpointer) (unsigned long) tid, newproc);
 204                 if (lookup_tid_list(tid)) {
 205                         add_filter_tid_list(newproc);
 206                 }
 207                 ctx->nbnewthreads++;
 208                 ctx->nbthreads++;
 209         }
 210         newproc->comm = strdup(comm);
 211         if (hostname) {
 212                 host = lookup_hostname_list(hostname);
 213                 if (!host)
 214                         host = add_hostname_list(hostname, 0);
 215                 if (!newproc->host || (newproc->host != host))
 216                         newproc->host = host;
 217                 if (is_hostname_filtered(hostname)) {
 218                         add_filter_tid_list(newproc);
 219                 }
 220         }
 221
 222         return newproc;
 223 }
 224
 225 struct processtop* update_proc(struct processtop* proc, int pid, int tid,
 226                 int ppid, int vpid, int vtid, int vppid, char *comm, char *hostname)
 227 {
 228         struct host *host;
 229
 230         if (proc) {
 231                 proc->pid = pid;
 232                 proc->tid = tid;
 233                 proc->ppid = ppid;
 234                 proc->vpid = vpid;
 235                 proc->vtid = vtid;
 236                 proc->vppid = vppid;
 237                 if (strcmp(proc->comm, comm) != 0) {
 238                         free(proc->comm);
 239                         proc->comm = strdup(comm);
 240                 }
 241                 if (hostname && !proc->host) {
 242                         host = lookup_hostname_list(hostname);
 243                         if (!host)
 244                                 host = add_hostname_list(hostname, 0);
 245                         if (!proc->host || (proc->host != host))
 246                                 proc->host = host;
 247                         if (is_hostname_filtered(hostname)) {
 248                                 add_filter_tid_list(proc);
 249                         }
 250                 }
 251         }
 252         return proc;
 253 }
 254
 255 /*
 256  * This function just sets the time of death of a process.
 257  * When we rotate the cputime we remove it from the process list.
 258  */
 259 void death_proc(struct lttngtop *ctx, int tid, char *comm,
 260                 unsigned long timestamp)
 261 {
 262         struct processtop *tmp;
 263         tmp = find_process_tid(ctx, tid, comm);
 264
 265         g_hash_table_remove(ctx->process_hash_table,
 266                         (gpointer) (unsigned long) tid);
 267         if (tmp && strcmp(tmp->comm, comm) == 0) {
 268                 tmp->death = timestamp;
 269                 ctx->nbdeadthreads++;
 270                 ctx->nbthreads--;
 271         }
 272 }
 273
 274 struct processtop* get_proc(struct lttngtop *ctx, int tid, char *comm,
 275                 unsigned long timestamp, char *hostname)
 276 {
 277         struct processtop *tmp;
 278
 279         tmp = find_process_tid(ctx, tid, comm);
 280         if (tmp && strcmp(tmp->comm, comm) == 0) {
 281                 return tmp;
 282         }
 283         return add_proc(ctx, tid, comm, timestamp, hostname);
 284 }
 285
 286 struct processtop *get_proc_pid(struct lttngtop *ctx, int tid, int pid,
 287                 unsigned long timestamp, char *hostname)
 288 {
 289         struct processtop *tmp;
 290         tmp = find_process_tid(ctx, tid, NULL);
 291         if (tmp && tmp->pid == pid)
 292                 return tmp;
 293         return add_proc(ctx, tid, "Unknown", timestamp, hostname);
 294 }
 295
 296 void add_thread(struct processtop *parent, struct processtop *thread)
 297 {
 298         gint i;
 299         struct processtop *tmp;
 300
 301         if (!parent)
 302                 return;
 303
 304         for (i = 0; i < parent->threads->len; i++) {
 305                 tmp = g_ptr_array_index(parent->threads, i);
 306                 if (tmp == thread)
 307                         return;
 308         }
 309         g_ptr_array_add(parent->threads, thread);
 310 }
 311
 312 struct cputime* add_cpu(int cpu)
 313 {
 314         struct cputime *newcpu;
 315
 316         newcpu = g_new0(struct cputime, 1);
 317         newcpu->id = cpu;
 318         newcpu->current_task = NULL;
 319         newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
 320
 321         g_ptr_array_add(lttngtop.cpu_table, newcpu);
 322
 323         return newcpu;
 324 }
 325 struct cputime* get_cpu(int cpu)
 326 {
 327         gint i;
 328         struct cputime *tmp;
 329
 330         for (i = 0; i < lttngtop.cpu_table->len; i++) {
 331                 tmp = g_ptr_array_index(lttngtop.cpu_table, i);
 332                 if (tmp->id == cpu)
 333                         return tmp;
 334         }
 335
 336         return add_cpu(cpu);
 337 }
 338
 339 /*
 340  * At the end of a sampling period, we need to display the cpu time for each
 341  * process and to reset it to zero for the next period
 342  */
 343 void rotate_cputime(unsigned long end)
 344 {
 345         gint i;
 346         struct cputime *tmp;
 347         unsigned long elapsed;
 348
 349         for (i = 0; i < lttngtop.cpu_table->len; i++) {
 350                 tmp = g_ptr_array_index(lttngtop.cpu_table, i);
 351                 elapsed = end - tmp->task_start;
 352                 if (tmp->current_task) {
 353                         tmp->current_task->totalcpunsec += elapsed;
 354                         tmp->current_task->threadstotalcpunsec += elapsed;
 355                         if (tmp->current_task->pid != tmp->current_task->tid &&
 356                                         tmp->current_task->threadparent) {
 357                                 tmp->current_task->threadparent->threadstotalcpunsec += elapsed;
 358                         }
 359                 }
 360                 tmp->task_start = end;
 361         }
 362 }
 363
 364 void reset_perf_counter(gpointer key, gpointer value, gpointer user_data)
 365 {
 366         ((struct perfcounter*) value)->count = 0;
 367 }
 368
 369 void copy_perf_counter(gpointer key, gpointer value, gpointer new_table)
 370 {
 371         struct perfcounter *newperf;
 372
 373         newperf = g_new0(struct perfcounter, 1);
 374         newperf->count = ((struct perfcounter *) value)->count;
 375         newperf->visible = ((struct perfcounter *) value)->visible;
 376         newperf->sort = ((struct perfcounter *) value)->sort;
 377         g_hash_table_insert((GHashTable *) new_table, strdup(key), newperf);
 378 }
 379
 380 void copy_process_table(gpointer key, gpointer value, gpointer new_table)
 381 {
 382         g_hash_table_insert((GHashTable *) new_table, key, value);
 383 }
 384
 385 void rotate_perfcounter() {
 386         int i;
 387         struct processtop *tmp;
 388
 389         for (i = 0; i < lttngtop.process_table->len; i++) {
 390                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 391                 g_hash_table_foreach(tmp->perf, reset_perf_counter, NULL);
 392         }
 393 }
 394
 395 void cleanup_processtop()
 396 {
 397         gint i, j;
 398         struct processtop *tmp;
 399         struct files *tmpf; /* a temporary file */
 400
 401         for (i = 0; i < lttngtop.process_table->len; i++) {
 402                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 403                 tmp->totalcpunsec = 0;
 404                 tmp->threadstotalcpunsec = 0;
 405                 tmp->fileread = 0;
 406                 tmp->filewrite = 0;
 407
 408                 for (j = 0; j < tmp->process_files_table->len; j++) {
 409                         tmpf = g_ptr_array_index(tmp->process_files_table, j);
 410                         if (tmpf != NULL) {
 411                                 tmpf->read = 0;
 412                                 tmpf->write = 0;
 413
 414                                 if (tmpf->flag == __NR_close)
 415                                         g_ptr_array_index(
 416                                                 tmp->process_files_table, j
 417                                         ) = NULL;
 418                         }
 419                 }
 420         }
 421 }
 422
 423 void reset_global_counters()
 424 {
 425         lttngtop.nbnewproc = 0;
 426         lttngtop.nbdeadproc = 0;
 427         lttngtop.nbnewthreads = 0;
 428         lttngtop.nbdeadthreads = 0;
 429         lttngtop.nbnewfiles = 0;
 430         lttngtop.nbclosedfiles = 0;
 431 }
 432
 433 void copy_global_counters(struct lttngtop *dst)
 434 {
 435         dst->nbproc = lttngtop.nbproc;
 436         dst->nbnewproc = lttngtop.nbnewproc;
 437         dst->nbdeadproc = lttngtop.nbdeadproc;
 438         dst->nbthreads = lttngtop.nbthreads;
 439         dst->nbnewthreads = lttngtop.nbnewthreads;
 440         dst->nbdeadthreads = lttngtop.nbdeadthreads;
 441         dst->nbfiles = lttngtop.nbfiles;
 442         dst->nbnewfiles = lttngtop.nbnewfiles;
 443         dst->nbclosedfiles = lttngtop.nbclosedfiles;
 444         reset_global_counters();
 445 }
 446
 447 struct lttngtop* get_copy_lttngtop(unsigned long start, unsigned long end)
 448 {
 449         gint i, j;
 450         unsigned long time;
 451         struct lttngtop *dst;
 452         struct processtop *tmp, *tmp2, *new;
 453         struct cputime *tmpcpu, *newcpu;
 454         struct files *tmpfile, *newfile;
 455         struct kprobes *tmpprobe, *newprobe;
 456
 457         dst = g_new0(struct lttngtop, 1);
 458         dst->start = start;
 459         dst->end = end;
 460         copy_global_counters(dst);
 461         dst->process_table = g_ptr_array_new();
 462         dst->files_table = g_ptr_array_new();
 463         dst->cpu_table = g_ptr_array_new();
 464         dst->kprobes_table = g_ptr_array_new();
 465         dst->process_hash_table = g_hash_table_new(g_direct_hash, g_direct_equal);
 466         g_hash_table_foreach(lttngtop.process_hash_table, copy_process_table,
 467                         dst->process_hash_table);
 468
 469         rotate_cputime(end);
 470
 471         for (i = 0; i < lttngtop.process_table->len; i++) {
 472                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 473                 new = g_new0(struct processtop, 1);
 474
 475                 memcpy(new, tmp, sizeof(struct processtop));
 476                 new->threads = g_ptr_array_new();
 477                 new->comm = strdup(tmp->comm);
 478                 new->process_files_table = g_ptr_array_new();
 479                 new->files_history = tmp->files_history;
 480                 new->perf = g_hash_table_new(g_str_hash, g_str_equal);
 481                 g_hash_table_foreach(tmp->perf, copy_perf_counter, new->perf);
 482
 483                 /* compute the stream speed */
 484                 if (end - start != 0) {
 485                         time = (end - start) / NSEC_PER_SEC;
 486                         new->fileread = new->fileread/(time);
 487                         new->filewrite = new->filewrite/(time);
 488                 }
 489
 490                 for (j = 0; j < tmp->process_files_table->len; j++) {
 491                         tmpfile = g_ptr_array_index(tmp->process_files_table, j);
 492
 493                         newfile = malloc(sizeof(struct files));
 494
 495                         if (tmpfile != NULL) {
 496                                 memcpy(newfile, tmpfile, sizeof(struct files));
 497                                 newfile->name = strdup(tmpfile->name);
 498                                 newfile->ref = new;
 499                                 g_ptr_array_add(new->process_files_table,
 500                                                 newfile);
 501                                 g_ptr_array_add(dst->files_table, newfile);
 502                         } else {
 503                                 g_ptr_array_add(new->process_files_table, NULL);
 504                                 g_ptr_array_add(dst->files_table, NULL);
 505                         }
 506                         /*
 507                          * if the process died during the last period, we remove all
 508                          * files associated with if after the copy
 509                          */
 510                         if (tmp->death > 0 && tmp->death < end) {
 511                                 /* FIXME : close the files before */
 512                                 g_ptr_array_remove(tmp->process_files_table, tmpfile);
 513                                 g_free(tmpfile);
 514                         }
 515                 }
 516                 g_ptr_array_add(dst->process_table, new);
 517
 518                 /*
 519                  * if the process died during the last period, we remove it from
 520                  * the current process list after the copy
 521                  */
 522                 if (tmp->death > 0 && tmp->death < end) {
 523                         g_ptr_array_remove(lttngtop.process_table, tmp);
 524                         /* FIXME : TRUE does not mean clears the object in it */
 525                         g_ptr_array_free(tmp->threads, TRUE);
 526                         free(tmp->comm);
 527                         g_ptr_array_free(tmp->process_files_table, TRUE);
 528                         /* FIXME : clear elements */
 529                         g_hash_table_destroy(tmp->perf);
 530                         g_free(tmp);
 531                 }
 532         }
 533         rotate_perfcounter();
 534
 535         for (i = 0; i < lttngtop.cpu_table->len; i++) {
 536                 tmpcpu = g_ptr_array_index(lttngtop.cpu_table, i);
 537                 newcpu = g_new0(struct cputime, 1);
 538                 memcpy(newcpu, tmpcpu, sizeof(struct cputime));
 539                 newcpu->perf = g_hash_table_new(g_str_hash, g_str_equal);
 540                 g_hash_table_foreach(tmpcpu->perf, copy_perf_counter, newcpu->perf);
 541                 /*
 542                  * note : we don't care about the current process pointer in the copy
 543                  * so the reference is invalid after the memcpy
 544                  */
 545                 g_ptr_array_add(dst->cpu_table, newcpu);
 546         }
 547         if (lttngtop.kprobes_table) {
 548                 for (i = 0; i < lttngtop.kprobes_table->len; i++) {
 549                         tmpprobe = g_ptr_array_index(lttngtop.kprobes_table, i);
 550                         newprobe = g_new0(struct kprobes, 1);
 551                         memcpy(newprobe, tmpprobe, sizeof(struct kprobes));
 552                         tmpprobe->count = 0;
 553                         g_ptr_array_add(dst->kprobes_table, newprobe);
 554                 }
 555         }
 556         /* FIXME : better algo */
 557         /* create the threads index if required */
 558         for (i = 0; i < dst->process_table->len; i++) {
 559                 tmp = g_ptr_array_index(dst->process_table, i);
 560                 if (tmp->pid == tmp->tid) {
 561                         for (j = 0; j < dst->process_table->len; j++) {
 562                                 tmp2 = g_ptr_array_index(dst->process_table, j);
 563                                 if (tmp2->pid == tmp->pid) {
 564                                         tmp2->threadparent = tmp;
 565                                         g_ptr_array_add(tmp->threads, tmp2);
 566                                 }
 567                         }
 568                 }
 569         }
 570
 571         //  update_global_stats(dst);
 572         cleanup_processtop();
 573
 574         return dst;
 575 }
 576
 577
 578 enum bt_cb_ret handle_statedump_process_state(struct bt_ctf_event *call_data,
 579                 void *private_data)
 580 {
 581         const struct bt_definition *scope;
 582         struct processtop *proc;
 583         unsigned long timestamp;
 584         int64_t pid, tid, ppid, vtid, vpid, vppid;
 585         char *procname, *hostname = NULL;
 586
 587         timestamp = bt_ctf_get_timestamp(call_data);
 588         if (timestamp == -1ULL)
 589                 goto error;
 590
 591         scope = bt_ctf_get_top_level_scope(call_data,
 592                          BT_EVENT_FIELDS);
 593         pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 594                              scope, "_pid"));
 595         if (bt_ctf_field_get_error()) {
 596                 fprintf(stderr, "Missing pid context info\n");
 597                 goto error;
 598         }
 599         ppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 600                                 scope, "_ppid"));
 601         if (bt_ctf_field_get_error()) {
 602                 fprintf(stderr, "Missing ppid context info\n");
 603                 goto error;
 604         }
 605         tid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 606                                 scope, "_tid"));
 607         if (bt_ctf_field_get_error()) {
 608                 fprintf(stderr, "Missing tid context info\n");
 609                 goto error;
 610         }
 611         vtid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 612                                 scope, "_vtid"));
 613         if (bt_ctf_field_get_error()) {
 614                 fprintf(stderr, "Missing vtid context info\n");
 615                 goto error;
 616         }
 617         vpid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 618                                 scope, "_vpid"));
 619         if (bt_ctf_field_get_error()) {
 620                 fprintf(stderr, "Missing vpid context info\n");
 621                 goto error;
 622         }
 623         vppid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 624                                 scope, "_vppid"));
 625         if (bt_ctf_field_get_error()) {
 626                 fprintf(stderr, "Missing vppid context info\n");
 627                 goto error;
 628         }
 629
 630         scope = bt_ctf_get_top_level_scope(call_data,
 631                         BT_EVENT_FIELDS);
 632         procname = bt_ctf_get_char_array(bt_ctf_get_field(call_data,
 633                                 scope, "_name"));
 634         if (bt_ctf_field_get_error()) {
 635                 fprintf(stderr, "Missing process name context info\n");
 636                 goto error;
 637         }
 638
 639         proc = find_process_tid(&lttngtop, tid, procname);
 640         if (proc == NULL)
 641                 proc = add_proc(&lttngtop, tid, procname, timestamp, hostname);
 642         update_proc(proc, pid, tid, ppid, vpid, vtid, vppid, procname, hostname);
 643
 644         if (proc) {
 645                 free(proc->comm);
 646                 proc->comm = strdup(procname);
 647                 proc->pid = pid;
 648         }
 649
 650         return BT_CB_OK;
 651
 652 error:
 653         return BT_CB_ERROR_STOP;
 654 }
 655
 656 struct tm format_timestamp(uint64_t timestamp)
 657 {
 658         struct tm tm;
 659         uint64_t ts_sec = 0, ts_nsec;
 660         time_t time_s;
 661
 662         ts_nsec = timestamp;
 663         ts_sec += ts_nsec / NSEC_PER_SEC;
 664         ts_nsec = ts_nsec % NSEC_PER_SEC;
 665
 666         time_s = (time_t) ts_sec;
 667
 668         localtime_r(&time_s, &tm);
 669
 670         return tm;
 671 }
 672
 673 int *lookup_tid_list(int tid)
 674 {
 675         if (!tid_filter_list)
 676                 return NULL;
 677
 678         return g_hash_table_lookup(tid_filter_list, (gpointer) &tid);
 679 }
 680
 681 struct host *lookup_hostname_list(const char *hostname)
 682 {
 683         if (!hostname || !global_host_list)
 684                 return NULL;
 685
 686         return g_hash_table_lookup(global_host_list, (gpointer) hostname);
 687 }
 688
 689 int is_hostname_filtered(const char *hostname)
 690 {
 691         struct host *host;
 692
 693         host = lookup_hostname_list(hostname);
 694         if (host)
 695                 return host->filter;
 696         return 0;
 697 }
 698
 699 int *lookup_filter_tid_list(int tid)
 700 {
 701         return g_hash_table_lookup(global_filter_list, (gpointer) &tid);
 702 }
 703
 704 void add_filter_tid_list(struct processtop *proc)
 705 {
 706         unsigned long *hash_tid;
 707
 708         hash_tid = malloc(sizeof(unsigned long));
 709         *hash_tid = proc->tid;
 710         g_hash_table_insert(global_filter_list,
 711                         (gpointer) (unsigned long) hash_tid, proc);
 712 }
 713
 714 void remove_filter_tid_list(int tid)
 715 {
 716         g_hash_table_remove(global_filter_list,
 717                         (gpointer) (unsigned long) &tid);
 718 }
 719
 720 struct host *add_hostname_list(char *hostname, int filter)
 721 {
 722         struct host *host;
 723
 724         host = lookup_hostname_list(hostname);
 725         if (host)
 726                 return host;
 727
 728         host = g_new0(struct host, 1);
 729         host->hostname = strdup(hostname);
 730         host->filter = filter;
 731         g_hash_table_insert(global_host_list,
 732                         (gpointer) host->hostname,
 733                         (gpointer) host);
 734
 735         return host;
 736 }
 737
 738 void update_hostname_filter(struct host *host)
 739 {
 740         struct processtop *tmp;
 741         int i;
 742
 743         for (i = 0; i < lttngtop.process_table->len; i++) {
 744                 tmp = g_ptr_array_index(lttngtop.process_table, i);
 745                 if (tmp->host == host) {
 746                         if (host->filter)
 747                                 add_filter_tid_list(tmp);
 748                         else
 749                                 remove_filter_tid_list(tmp->tid);
 750                 }
 751         }
 752 }