src/iostreamtop.c

   1 /*
   2  * Copyright (C) 2011-2012 Mathieu Bain <mathieu.bain@polymtl.ca>
   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 <stdlib.h>
  19 #include <unistd.h>
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <string.h>
  23 #include <babeltrace/babeltrace.h>
  24
  25 #include "lttngtoptypes.h"
  26 #include "common.h"
  27 #include "iostreamtop.h"
  28
  29 void add_file(struct processtop *proc, struct files *file, int fd)
  30 {
  31         struct files *tmp_file;
  32         struct processtop *parent;
  33         int size;
  34         int i;
  35
  36         size = proc->process_files_table->len;
  37         parent = proc->threadparent;
  38         if (parent)
  39                 insert_file(parent, fd);
  40         if (size <= fd) {
  41                 /* Add NULL file structures for undefined FDs */
  42                 for (i = size; i < fd; i++) {
  43                         g_ptr_array_add(proc->process_files_table, NULL);
  44                 }
  45                 g_ptr_array_add(proc->process_files_table, file);
  46         } else {
  47                 tmp_file = g_ptr_array_index(proc->process_files_table, fd);
  48                 if (tmp_file == NULL)
  49                         g_ptr_array_index(proc->process_files_table, fd) = file;
  50                 else {
  51                         if (strcmp(tmp_file->name, file->name) != 0) {
  52                                 size = proc->process_files_table->len;
  53                                 g_ptr_array_set_size(proc->process_files_table,
  54                                                                 size+1);
  55                                 g_ptr_array_index(proc->process_files_table,
  56                                                         size) = tmp_file;
  57                                 g_ptr_array_index(proc->process_files_table,
  58                                                         fd) = file;
  59                         } else
  60                                 tmp_file->flag = __NR_open;
  61                 }
  62         }
  63         /*
  64          * The file may have be created in the parent
  65          */
  66         if (file->flag == -1) {
  67                 file->fd = fd;
  68                 file->flag = __NR_open;
  69                 lttngtop.nbfiles++;
  70                 lttngtop.nbnewfiles++;
  71         }
  72 }
  73
  74 /*
  75  * Edit the file
  76  * Called by handled_statedump_filename
  77  */
  78 void edit_file(struct processtop *proc, struct files *file, int fd)
  79 {
  80         int size = proc->process_files_table->len;
  81         struct files *tmpfile;
  82
  83         if (fd >= size) {
  84                 add_file(proc, file, fd);
  85         } else {
  86                 tmpfile = g_ptr_array_index(proc->process_files_table, fd);
  87                 if (tmpfile) {
  88                         tmpfile->name = strdup(file->name);
  89                         free(file);
  90                 } else
  91                         add_file(proc, file, fd);
  92         }
  93 }
  94
  95 void insert_file(struct processtop *proc, int fd)
  96 {
  97         struct files *tmp;
  98         struct files *tmp_parent;
  99         struct processtop *parent;
 100
 101         if (fd < 0)
 102                 return;
 103         if (fd >= proc->process_files_table->len) {
 104                 tmp = g_new0(struct files, 1);
 105                 tmp->name = "Unknown";
 106                 tmp->read = 0;
 107                 tmp->write = 0;
 108                 tmp->fd = fd;
 109                 tmp->flag = -1;
 110                 add_file(proc, tmp, fd);
 111         } else {
 112                 tmp = g_ptr_array_index(proc->process_files_table, fd);
 113                 if (tmp == NULL) {
 114                         tmp = g_new0(struct files, 1);
 115                         tmp->name = "Unknown";
 116                         tmp->read = 0;
 117                         tmp->write = 0;
 118                         tmp->fd = fd;
 119                         tmp->flag = -1;
 120                         add_file(proc, tmp, fd);
 121                 } else {
 122                         parent = proc->threadparent;
 123                         if (parent) {
 124                                 tmp_parent = g_ptr_array_index(
 125                                         parent->process_files_table, fd);
 126                                 if (tmp_parent &&
 127                                    (strcmp(tmp->name, tmp_parent->name)) != 0)
 128                                         tmp->name = strdup(tmp_parent->name);
 129                         }
 130                 }
 131         }
 132 }
 133
 134 void close_file(struct processtop *proc, int fd)
 135 {
 136         struct files *file;
 137
 138         file = get_file(proc, fd);
 139         if (file != NULL) {
 140                 file->flag = __NR_close;
 141                 lttngtop.nbfiles--;
 142         }
 143         lttngtop.nbclosedfiles++;
 144 }
 145
 146 struct files *get_file(struct processtop *proc, int fd)
 147 {
 148         int len;
 149         struct files *tmp = NULL;
 150
 151         len = proc->process_files_table->len;
 152
 153         /*
 154          * It is possible that a file was open before taking the trace
 155          * and its fd could be greater than all of the others fd
 156          * used by the process
 157          */
 158         if (fd < len && fd >= 0)
 159                 tmp = g_ptr_array_index(proc->process_files_table, fd);
 160
 161         return tmp;
 162 }
 163
 164 void show_table(GPtrArray *tab)
 165 {
 166         int i;
 167         struct files *file;
 168
 169         for (i = 0 ; i < tab->len; i++) {
 170                 file = g_ptr_array_index(tab, i);
 171                 if (file == NULL)
 172                         fprintf(stderr, "NULL, ");
 173                 else
 174                         fprintf(stderr, "%s, ", file->name);
 175         }
 176         fprintf(stderr, "]\n\n");
 177 }
 178
 179 void show_history(struct file_history *history)
 180 {
 181         struct file_history *tmp = history;
 182
 183         while (tmp != NULL) {
 184                 fprintf(stderr, "fd = %d, name = %s\n", tmp->file->fd,
 185                                         tmp->file->name);
 186                 tmp = tmp->next;
 187         }
 188
 189 }
 190
 191 int update_iostream_ret(struct lttngtop *ctx, int tid, char *comm,
 192                 unsigned long timestamp, uint64_t cpu_id, int ret)
 193 {
 194         struct processtop *tmp;
 195         struct files *tmpfile;
 196         int err = 0;
 197
 198         tmp = get_proc(ctx, tid, comm, timestamp);
 199
 200         if (!tmp) {
 201                 err = -1;
 202                 goto end;
 203         }
 204         if (tmp->syscall_info != NULL) {
 205                 if (tmp->syscall_info->type == __NR_read
 206                         && ret > 0) {
 207                         tmp->totalfileread += ret;
 208                         tmp->fileread += ret;
 209                         tmpfile = get_file(tmp, tmp->syscall_info->fd);
 210                         if (tmpfile)
 211                                 tmpfile->read += ret;
 212                 } else if (tmp->syscall_info->type == __NR_write
 213                         && ret > 0) {
 214                         tmp->totalfilewrite += ret;
 215                         tmp->filewrite += ret;
 216                         tmpfile = get_file(tmp, tmp->syscall_info->fd);
 217                         if (tmpfile)
 218                                 tmpfile->write += ret;
 219                 } else if (tmp->syscall_info->type == __NR_open
 220                         && ret > 0) {
 221                         tmpfile = tmp->files_history->file;
 222                         add_file(tmp, tmpfile, ret);
 223                         tmpfile->fd = ret;
 224                 } else {
 225                         err = -1;
 226                 }
 227                 g_free(tmp->syscall_info);
 228                 tmp->syscall_info = NULL;
 229         }
 230
 231 end:
 232         return err;
 233 }
 234
 235 struct syscalls *create_syscall_info(unsigned int type, uint64_t cpu_id,
 236                 unsigned int tid, int fd)
 237 {
 238         struct syscalls *syscall_info;
 239
 240         syscall_info = g_new0(struct syscalls, 1);
 241         syscall_info->type = type;
 242         syscall_info->cpu_id = cpu_id;
 243         syscall_info->tid = tid;
 244         syscall_info->fd = fd;
 245
 246         return syscall_info;
 247 }
 248
 249 struct file_history *create_file(struct file_history *history, char *file_name)
 250 {
 251         struct files *new_file;
 252         struct file_history *new_history;
 253
 254         new_file = g_new0(struct files, 1);
 255         new_history = g_new0(struct file_history, 1);
 256         new_file->name = strdup(file_name);
 257         new_file->read = 0;
 258         new_file->write = 0;
 259         new_file->flag = -1;
 260         new_history->file = new_file;
 261         new_history->next = history;
 262
 263         return new_history;
 264 }
 265
 266 enum bt_cb_ret handle_exit_syscall(struct bt_ctf_event *call_data,
 267                 void *private_data)
 268 {
 269         const struct bt_definition *scope;
 270         unsigned long timestamp;
 271         char *comm;
 272         uint64_t ret, tid;
 273         uint64_t cpu_id;
 274
 275         timestamp = bt_ctf_get_timestamp(call_data);
 276         if (timestamp == -1ULL)
 277                 goto error;
 278
 279         comm = get_context_comm(call_data);
 280         tid = get_context_tid(call_data);
 281
 282         scope = bt_ctf_get_top_level_scope(call_data,
 283                         BT_EVENT_FIELDS);
 284         ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 285                                 scope, "_ret"));
 286         if (bt_ctf_field_get_error()) {
 287                 fprintf(stderr, "Missing ret context info\n");
 288                 goto error;
 289         }
 290
 291         cpu_id = get_cpu_id(call_data);
 292
 293         /*
 294          * if we encounter an exit_syscall and
 295          * it is not for a syscall read or write
 296          * we just abort the execution of this callback
 297          */
 298         if ((update_iostream_ret(&lttngtop, tid, comm, timestamp, cpu_id, ret)) < 0)
 299                 return BT_CB_ERROR_CONTINUE;
 300
 301         return BT_CB_OK;
 302
 303 error:
 304         return BT_CB_ERROR_STOP;
 305 }
 306
 307
 308 enum bt_cb_ret handle_sys_write(struct bt_ctf_event *call_data,
 309                 void *private_data)
 310 {
 311         const struct bt_definition *scope;
 312         struct processtop *tmp;
 313         unsigned long timestamp;
 314         uint64_t cpu_id;
 315         int64_t tid;
 316         char *procname;
 317         int fd;
 318
 319         timestamp = bt_ctf_get_timestamp(call_data);
 320         if (timestamp == -1ULL)
 321                 goto error;
 322
 323         tid = get_context_tid(call_data);
 324         cpu_id = get_cpu_id(call_data);
 325
 326         procname = get_context_comm(call_data);
 327
 328         scope = bt_ctf_get_top_level_scope(call_data,
 329                         BT_EVENT_FIELDS);
 330         fd = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
 331                                 scope, "_fd"));
 332         if (bt_ctf_field_get_error()) {
 333                 fprintf(stderr, "Missing fd context info\n");
 334                 goto error;
 335         }
 336
 337         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 338         if (!tmp)
 339                 goto end;
 340
 341         tmp->syscall_info = create_syscall_info(__NR_write, cpu_id, tid, fd);
 342
 343         insert_file(tmp, fd);
 344
 345 end:
 346         return BT_CB_OK;
 347
 348 error:
 349         return BT_CB_ERROR_STOP;
 350 }
 351
 352 enum bt_cb_ret handle_sys_read(struct bt_ctf_event *call_data,
 353                 void *private_data)
 354 {
 355         struct processtop *tmp;
 356         const struct bt_definition *scope;
 357         unsigned long timestamp;
 358         uint64_t cpu_id;
 359         int64_t tid;
 360         char *procname;
 361         int fd;
 362
 363         timestamp = bt_ctf_get_timestamp(call_data);
 364         if (timestamp == -1ULL)
 365                 goto error;
 366
 367         tid = get_context_tid(call_data);
 368         cpu_id = get_cpu_id(call_data);
 369
 370         procname = get_context_comm(call_data);
 371
 372         scope = bt_ctf_get_top_level_scope(call_data,
 373                         BT_EVENT_FIELDS);
 374         fd = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
 375                                 scope, "_fd"));
 376         if (bt_ctf_field_get_error()) {
 377                 fprintf(stderr, "Missing fd context info\n");
 378                 goto error;
 379         }
 380
 381         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 382         if (!tmp)
 383                 goto end;
 384
 385         tmp->syscall_info = create_syscall_info(__NR_read, cpu_id, tid, fd);
 386
 387         insert_file(tmp, fd);
 388
 389 end:
 390         return BT_CB_OK;
 391
 392 error:
 393         return BT_CB_ERROR_STOP;
 394 }
 395
 396
 397 enum bt_cb_ret handle_sys_open(struct bt_ctf_event *call_data,
 398                 void *private_data)
 399 {
 400
 401         struct processtop *tmp;
 402         const struct bt_definition *scope;
 403         unsigned long timestamp;
 404         uint64_t cpu_id;
 405         int64_t tid;
 406         char *procname;
 407         char *file;
 408
 409         timestamp = bt_ctf_get_timestamp(call_data);
 410         if (timestamp == -1ULL)
 411                 goto error;
 412
 413         tid = get_context_tid(call_data);
 414         cpu_id = get_cpu_id(call_data);
 415
 416         procname = get_context_comm(call_data);
 417
 418         scope = bt_ctf_get_top_level_scope(call_data,
 419                         BT_EVENT_FIELDS);
 420         file = bt_ctf_get_string(bt_ctf_get_field(call_data,
 421                                 scope, "_filename"));
 422         if (bt_ctf_field_get_error()) {
 423                 fprintf(stderr, "Missing file name context info\n");
 424                 goto error;
 425         }
 426
 427         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 428         if (!tmp)
 429                 goto end;
 430
 431         tmp->syscall_info = create_syscall_info(__NR_open, cpu_id, tid, -1);
 432
 433         tmp->files_history = create_file(tmp->files_history, file);
 434
 435 end:
 436         return BT_CB_OK;
 437
 438 error:
 439         return BT_CB_ERROR_STOP;
 440 }
 441
 442
 443 enum bt_cb_ret handle_sys_close(struct bt_ctf_event *call_data,
 444                 void *private_data)
 445 {
 446         const struct bt_definition *scope;
 447         struct processtop *tmp;
 448         unsigned long timestamp;
 449         int64_t tid;
 450         char *procname;
 451         int fd;
 452
 453         timestamp = bt_ctf_get_timestamp(call_data);
 454         if (timestamp == -1ULL)
 455                 goto error;
 456
 457         tid = get_context_tid(call_data);
 458
 459         procname = get_context_comm(call_data);
 460
 461         scope = bt_ctf_get_top_level_scope(call_data,
 462                         BT_EVENT_FIELDS);
 463         fd = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
 464                                 scope, "_fd"));
 465         if (bt_ctf_field_get_error()) {
 466                 fprintf(stderr, "Missing fd context info\n");
 467                 goto error;
 468         }
 469
 470         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 471         if (!tmp)
 472                 goto end;
 473
 474         close_file(tmp, fd);
 475
 476 end:
 477         return BT_CB_OK;
 478
 479 error:
 480         return BT_CB_ERROR_STOP;
 481 }
 482
 483 enum bt_cb_ret handle_statedump_file_descriptor(struct bt_ctf_event *call_data,
 484                 void *private_data)
 485 {
 486         const struct bt_definition *scope;
 487         struct processtop *parent;
 488         struct files *file;
 489         unsigned long timestamp;
 490         int64_t pid;
 491         char *file_name;
 492         int fd;
 493
 494         timestamp = bt_ctf_get_timestamp(call_data);
 495         if (timestamp == -1ULL)
 496                 goto error;
 497
 498         scope = bt_ctf_get_top_level_scope(call_data,
 499                          BT_EVENT_FIELDS);
 500         pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 501                              scope, "_pid"));
 502         if (bt_ctf_field_get_error()) {
 503                 fprintf(stderr, "Missing tid context info\n");
 504                 goto error;
 505         }
 506
 507         scope = bt_ctf_get_top_level_scope(call_data,
 508                         BT_EVENT_FIELDS);
 509         fd = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 510                                 scope, "_fd"));
 511         if (bt_ctf_field_get_error()) {
 512                 fprintf(stderr, "Missing fd context info\n");
 513                 goto error;
 514         }
 515
 516         scope = bt_ctf_get_top_level_scope(call_data,
 517                         BT_EVENT_FIELDS);
 518         file_name = bt_ctf_get_string(bt_ctf_get_field(call_data,
 519                                 scope, "_filename"));
 520         if (bt_ctf_field_get_error()) {
 521                 fprintf(stderr, "Missing file name context info\n");
 522                 goto error;
 523         }
 524
 525         parent = get_proc_pid(&lttngtop, pid, pid, timestamp);
 526         if (!parent)
 527                 goto end;
 528
 529         parent->files_history = create_file(parent->files_history, file_name);
 530         file = parent->files_history->file;
 531         edit_file(parent, file, fd);
 532
 533 end:
 534         return BT_CB_OK;
 535
 536 error:
 537         return BT_CB_ERROR_STOP;
 538 }