lttv/lttv/traceset.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2003-2004 Michel Dagenais
   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
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  16  * MA 02111-1307, USA.
  17  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include <config.h>
  21 #endif
  22
  23 #include <lttv/traceset.h>
  24 #include <lttv/iattribute.h>
  25 #include <lttv/state.h>
  26 #include <lttv/hook.h>
  27 #include <stdio.h>
  28 #include <babeltrace/babeltrace.h>
  29 #include <babeltrace/context.h>
  30 #include <babeltrace/ctf/iterator.h>
  31 #include <babeltrace/ctf/events.h>
  32
  33 /* To traverse a tree recursively */
  34 #include <fcntl.h>
  35 #include <fts.h>
  36 /* For the use of realpath*/
  37 #include <limits.h>
  38 #include <stdlib.h>
  39 /* For strcpy*/
  40 #include <string.h>
  41
  42 /* A trace is a sequence of events gathered in the same tracing session. The
  43    events may be stored in several tracefiles in the same directory.
  44    A trace set is defined when several traces are to be analyzed together,
  45    possibly to study the interactions between events in the different traces.
  46 */
  47
  48
  49 LttvTraceset *lttv_traceset_new(void)
  50 {
  51         LttvTraceset *s;
  52         struct bt_iter_pos begin_pos;
  53
  54         s = g_new(LttvTraceset, 1);
  55         s->filename = NULL;
  56         s->traces = g_ptr_array_new();
  57         s->context = bt_context_create();
  58         s->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
  59         //TODO remove this when we have really mecanism
  60         //s->tmpState = g_new(LttvTraceState *, 1);
  61         //lttv_trace_state_init(s->tmpState,0);
  62
  63         s->iter = 0;
  64         s->event_hooks = lttv_hooks_new();
  65
  66         s->state_trace_handle_index =  g_ptr_array_new();
  67
  68         return s;
  69 }
  70
  71 char * lttv_traceset_name(LttvTraceset * s)
  72 {
  73         return s->filename;
  74 }
  75
  76 #ifdef BABEL_CLEANUP
  77 LttvTrace *lttv_trace_new(LttTrace *t)
  78 {
  79         LttvTrace *new_trace;
  80
  81         new_trace = g_new(LttvTrace, 1);
  82         new_trace->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
  83         new_trace->id = t;
  84         new_trace->ref_count = 0;
  85         return new_trace;
  86 }
  87 #endif
  88 /*
  89  * get_absolute_pathname : Return the unique pathname in the system
  90  *
  91  * pathname is the relative path.
  92  *
  93  * abs_pathname is being set to the absolute path.
  94  *
  95  */
  96 void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
  97 {
  98   abs_pathname[0] = '\0';
  99
 100   if (realpath(pathname, abs_pathname) != NULL)
 101     return;
 102   else
 103   {
 104     /* error, return the original path unmodified */
 105     strcpy(abs_pathname, pathname);
 106     return;
 107   }
 108   return;
 109 }
 110
 111
 112
 113 /*
 114  * lttv_trace_create : Create a trace from a path
 115  *
 116  * ts is the traceset in which will be contained the trace
 117  *
 118  * path is the path where to find a trace. It is not recursive.
 119  *
 120  * This function is static since a trace should always be contained in a
 121  * traceset.
 122  *
 123  * return the created trace or NULL on failure
 124  */
 125 static LttvTrace *lttv_trace_create(LttvTraceset *ts, const char *path)
 126 {
 127   int id = bt_context_add_trace(lttv_traceset_get_context(ts),
 128             path,
 129             "ctf",
 130             NULL,
 131             NULL,
 132             NULL);
 133   if (id < 0) {
 134     return NULL;
 135   }
 136   // Create the trace and save the trace handle id returned by babeltrace
 137   LttvTrace *new_trace;
 138
 139   new_trace = g_new(LttvTrace, 1);
 140   new_trace->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
 141   new_trace->id = id;
 142   new_trace->ref_count = 0;
 143   new_trace->traceset = ts;
 144   new_trace->state = g_new(LttvTraceState,1);
 145   lttv_trace_state_init(new_trace->state,new_trace);
 146
 147   /* Add the state to the trace_handle to state index */
 148   g_ptr_array_set_size(ts->state_trace_handle_index,id+1);
 149   g_ptr_array_index(ts->state_trace_handle_index,id) = new_trace->state;
 150
 151   return new_trace;
 152 }
 153
 154 /*
 155  * lttv_trace_create : Create and add a single trace to a traceset
 156  *
 157  * ts is the traceset in which will be contained the trace
 158  *
 159  * path is the path where to find a trace. It is not recursive.
 160  *
 161  * return a positive integer (>=0)on success or -1 on failure
 162  */
 163 static int lttv_traceset_create_trace(LttvTraceset *ts, const char *path)
 164 {
 165   LttvTrace *trace = lttv_trace_create(ts, path);
 166   if (trace == NULL) {
 167     return -1;
 168   }
 169   lttv_traceset_add(ts, trace);
 170   return 0;
 171 }
 172
 173 LttvTraceset *lttv_traceset_copy(LttvTraceset *s_orig)
 174 {
 175         guint i;
 176         LttvTraceset *s;
 177         LttvTrace * trace;
 178
 179         s = g_new(LttvTraceset, 1);
 180         s->filename = NULL;
 181         s->traces = g_ptr_array_new();
 182         s->state_trace_handle_index = g_ptr_array_new();
 183         for(i=0;i<s_orig->traces->len;i++)
 184         {
 185                 trace = g_ptr_array_index(s_orig->traces, i);
 186                 trace->ref_count++;
 187
 188                 /* WARNING: this is an alias, not a copy. */
 189                 g_ptr_array_add(s->traces, trace);
 190
 191                 g_ptr_array_set_size(s->state_trace_handle_index,trace->id+1);
 192                 g_ptr_array_index(s->state_trace_handle_index,trace->id) = trace->state;
 193
 194         }
 195         s->context = s_orig->context;
 196         bt_context_get(s->context);
 197         s->a = LTTV_ATTRIBUTE(lttv_iattribute_deep_copy(LTTV_IATTRIBUTE(s_orig->a)));
 198         return s;
 199 }
 200
 201
 202 LttvTraceset *lttv_traceset_load(const gchar *filename)
 203 {
 204         LttvTraceset *s = g_new(LttvTraceset,1);
 205         FILE *tf;
 206
 207         s->filename = g_strdup(filename);
 208         tf = fopen(filename,"r");
 209
 210         g_critical("NOT IMPLEMENTED : load traceset data from a XML file");
 211
 212         fclose(tf);
 213         return s;
 214 }
 215
 216 gint lttv_traceset_save(LttvTraceset *s)
 217 {
 218         FILE *tf;
 219
 220         tf = fopen(s->filename, "w");
 221
 222         g_critical("NOT IMPLEMENTED : save traceset data in a XML file");
 223
 224         fclose(tf);
 225         return 0;
 226 }
 227
 228 void lttv_traceset_destroy(LttvTraceset *s)
 229 {
 230         guint i;
 231
 232         for(i=0;i<s->traces->len;i++) {
 233                 LttvTrace *trace = g_ptr_array_index(s->traces, i);
 234                 lttv_trace_unref(trace);
 235                 // todo mdenis 2012-03-27: uncomment when babeltrace gets fixed
 236                 //bt_context_remove_trace(lttv_traceset_get_context(s), trace->id);
 237                 if(lttv_trace_get_ref_number(trace) == 0)
 238                         lttv_trace_destroy(trace);
 239         }
 240         g_ptr_array_free(s->traces, TRUE);
 241         bt_context_put(s->context);
 242         g_object_unref(s->a);
 243         g_free(s);
 244 }
 245
 246 struct bt_context *lttv_traceset_get_context(LttvTraceset *s)
 247 {
 248         return s->context;
 249 }
 250
 251 LttvTraceset *lttv_trace_get_traceset(LttvTrace *trace)
 252 {
 253         return trace->traceset;
 254 }
 255
 256 LttvHooks *lttv_traceset_get_hooks(LttvTraceset *s)
 257 {
 258         return s->event_hooks;
 259 }
 260
 261 void lttv_trace_destroy(LttvTrace *t)
 262 {
 263         g_object_unref(t->a);
 264         g_free(t);
 265 }
 266
 267 void lttv_traceset_add(LttvTraceset *s, LttvTrace *t)
 268 {
 269         t->ref_count++;
 270         g_ptr_array_add(s->traces, t);
 271 }
 272
 273 int lttv_traceset_add_path(LttvTraceset *ts, char *trace_path)
 274 {
 275
 276         FTS *tree;
 277         FTSENT *node;
 278         char * const paths[2] = { trace_path, NULL };
 279         int ret = -1;
 280
 281         ts->filename = trace_path;
 282
 283         tree = fts_open(paths, FTS_NOCHDIR | FTS_LOGICAL, 0);
 284         if (tree == NULL) {
 285                 g_warning("Cannot traverse \"%s\" for reading.\n",
 286                                 trace_path);
 287                 return ret;
 288         }
 289
 290         int dirfd, metafd;
 291         while ((node = fts_read(tree))) {
 292
 293                 if (!(node->fts_info & FTS_D))
 294                         continue;
 295
 296                 dirfd = open(node->fts_accpath, 0);
 297                 if (dirfd < 0) {
 298                         g_warning("Unable to open trace "
 299                                         "directory file descriptor : %s.", node->fts_accpath);
 300                         ret = dirfd;
 301                         goto error;
 302                 }
 303
 304                 // Check if a metadata file exists in the current directory
 305                 metafd = openat(dirfd, "metadata", O_RDONLY);
 306                 if (metafd < 0) {
 307                         ret = close(dirfd);
 308                         if (ret < 0) {
 309                                 g_warning("Unable to open metadata "
 310                                                 "file descriptor : %s.", node->fts_accpath);
 311                                 goto error;
 312                         }
 313                 } else {
 314                         ret = close(metafd);
 315                         if (ret < 0) {
 316                                 g_warning("Unable to close metadata "
 317                                                 "file descriptor : %s.", node->fts_accpath);
 318                                 goto error;
 319                         }
 320                         ret = close(dirfd);
 321                         if (ret < 0) {
 322                                 g_warning("Unable to close trace "
 323                                                 "directory file descriptor : %s.", node->fts_accpath);
 324                                 goto error;
 325                         }
 326
 327                         ret = lttv_traceset_create_trace(ts, node->fts_accpath);
 328                         if (ret < 0) {
 329                                 g_warning("Opening trace \"%s\" from %s "
 330                                                 "for reading.", node->fts_accpath, trace_path);
 331                                 goto error;
 332                         }
 333                 }
 334         }
 335
 336 error:
 337         ret = fts_close(tree);
 338         if (ret < 0) {
 339                 g_warning("Unable to close tree  "
 340                                 "file descriptor : %s.", trace_path);
 341         }
 342         return ret;
 343 }
 344
 345 unsigned lttv_traceset_number(LttvTraceset *s)
 346 {
 347         return s->traces->len;
 348 }
 349
 350
 351 LttvTrace *lttv_traceset_get(LttvTraceset *s, unsigned i)
 352 {
 353         g_assert(s->traces->len > i);
 354         return ((LttvTrace *)s->traces->pdata[i]);
 355 }
 356
 357
 358 void lttv_traceset_remove(LttvTraceset *s, unsigned i)
 359 {
 360         LttvTrace * t;
 361         g_assert(s->traces->len > i);
 362         t = (LttvTrace *)s->traces->pdata[i];
 363         t->ref_count--;
 364         bt_context_remove_trace(lttv_traceset_get_context(s), t->id);
 365         g_ptr_array_remove_index(s->traces, i);
 366 }
 367
 368
 369 /* A set of attributes is attached to each trace set, trace and tracefile
 370          to store user defined data as needed. */
 371
 372 LttvAttribute *lttv_traceset_attribute(LttvTraceset *s)
 373 {
 374         return s->a;
 375 }
 376
 377
 378 LttvAttribute *lttv_trace_attribute(LttvTrace *t)
 379 {
 380         return t->a;
 381 }
 382
 383
 384 gint lttv_trace_get_id(LttvTrace *t)
 385 {
 386   return t->id;
 387 }
 388
 389 guint lttv_trace_get_ref_number(LttvTrace * t)
 390 {
 391         // todo mdenis: adapt to babeltrace
 392         return t->ref_count;
 393 }
 394
 395 guint lttv_trace_ref(LttvTrace * t)
 396 {
 397         t->ref_count++;
 398
 399         return t->ref_count;
 400 }
 401
 402 guint lttv_trace_unref(LttvTrace * t)
 403 {
 404         if(likely(t->ref_count > 0))
 405                 t->ref_count--;
 406
 407         return t->ref_count;
 408 }
 409
 410 guint lttv_trace_get_num_cpu(LttvTrace *t)
 411 {
 412 #warning "TODO - Set the right number of CPU"
 413         return 24;
 414 }
 415
 416 LttvTracesetPosition *lttv_traceset_create_position(LttvTraceset *traceset)
 417 {
 418         LttvTracesetPosition *traceset_pos;
 419
 420         traceset_pos = g_new(LttvTracesetPosition, 1);
 421
 422         /* Check in the new passed */
 423         if(traceset_pos == NULL) {
 424                 return NULL;
 425         }
 426
 427         traceset_pos->iter = traceset->iter;
 428         traceset_pos->bt_pos = bt_iter_get_pos(bt_ctf_get_iter(traceset->iter));
 429
 430         return traceset_pos;
 431 }
 432
 433 void lttv_traceset_destroy_position(LttvTracesetPosition *traceset_pos)
 434 {
 435         bt_iter_free_pos(traceset_pos->bt_pos);
 436         g_free(traceset_pos);
 437 }
 438
 439 void lttv_traceset_seek_to_position(LttvTracesetPosition *traceset_pos)
 440 {
 441         bt_iter_set_pos(traceset_pos->iter, traceset_pos->bt_pos);
 442 }
 443
 444 guint lttv_traceset_get_cpuid_from_event(LttvEvent *event)
 445 {
 446         struct definition *scope;
 447         unsigned long timestamp;
 448         unsigned int cpu_id;
 449
 450         struct bt_ctf_event *ctf_event = event->bt_event;
 451         timestamp = bt_ctf_get_timestamp(ctf_event);
 452         if (timestamp == -1ULL) {
 453                 return 0;
 454         }
 455         scope = bt_ctf_get_top_level_scope(ctf_event, BT_STREAM_PACKET_CONTEXT);
 456         if (bt_ctf_field_get_error()) {
 457                 return 0;
 458         }
 459         cpu_id = bt_ctf_get_uint64(bt_ctf_get_field(ctf_event, scope, "cpu_id"));
 460         if (bt_ctf_field_get_error()) {
 461                 return 0;
 462         } else {
 463                 return cpu_id;
 464         }
 465 }
 466 /*
 467  * lttv_traceset_get_timestamp_begin : returns the  minimum timestamp of
 468  * all the traces in the traceset.
 469  *
 470  */
 471
 472 guint64 lttv_traceset_get_timestamp_begin(LttvTraceset *traceset)
 473 {
 474   struct bt_context *bt_ctx;
 475   bt_ctx = lttv_traceset_get_context(traceset);
 476   guint64 timestamp_min = G_MAXUINT64, timestamp_cur = 0;
 477   int i;
 478   int trace_count;
 479   LttvTrace *currentTrace;
 480   trace_count = traceset->traces->len;
 481   if(trace_count == 0)
 482     timestamp_min = 0;
 483   else{
 484     timestamp_min = G_MAXUINT64;
 485
 486     for(i = 0; i < trace_count;i++)
 487     {
 488       currentTrace = g_ptr_array_index(traceset->traces,i);
 489       timestamp_cur = bt_trace_handle_get_timestamp_begin(bt_ctx, currentTrace->id);
 490       if(timestamp_cur < timestamp_min)
 491         timestamp_min = timestamp_cur;
 492     }
 493   }
 494   return timestamp_min;
 495 }
 496
 497 /*
 498  * lttv_traceset_get_timestamp_end: returns the maximum timestamp of
 499  * all the traces in the traceset.
 500  *
 501  */
 502 guint64 lttv_traceset_get_timestamp_end(LttvTraceset *traceset)
 503 {
 504   struct bt_context *bt_ctx;
 505   bt_ctx = lttv_traceset_get_context(traceset);
 506   guint64 timestamp_max, timestamp_cur = 0;
 507   int i;
 508   int trace_count;
 509   LttvTrace *currentTrace;
 510   trace_count = traceset->traces->len;
 511
 512   if(trace_count == 0)
 513     timestamp_max = 1;
 514   else
 515   {
 516     timestamp_max = 0;
 517     for(i =0; i < trace_count;i++)
 518     {
 519       currentTrace = g_ptr_array_index(traceset->traces,i);
 520       timestamp_cur = bt_trace_handle_get_timestamp_end(bt_ctx, currentTrace->id);
 521       if(timestamp_cur > timestamp_max)
 522         timestamp_max = timestamp_cur;
 523     }
 524   }
 525   return timestamp_max;
 526
 527 }
 528
 529 const char *lttv_traceset_get_name_from_event(LttvEvent *event)
 530 {
 531         return bt_ctf_event_name(event->bt_event);
 532 }