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->syscall_info != NULL) {
 201                 if (tmp->syscall_info->type == __NR_read
 202                         && ret > 0) {
 203                         tmp->totalfileread += ret;
 204                         tmp->fileread += ret;
 205                         tmpfile = get_file(tmp, tmp->syscall_info->fd);
 206                         if (tmpfile)
 207                                 tmpfile->read += ret;
 208                 } else if (tmp->syscall_info->type == __NR_write
 209                         && ret > 0) {
 210                         tmp->totalfilewrite += ret;
 211                         tmp->filewrite += ret;
 212                         tmpfile = get_file(tmp, tmp->syscall_info->fd);
 213                         if (tmpfile)
 214                                 tmpfile->write += ret;
 215                 } else if (tmp->syscall_info->type == __NR_open
 216                         && ret > 0) {
 217                         tmpfile = tmp->files_history->file;
 218                         add_file(tmp, tmpfile, ret);
 219                         tmpfile->fd = ret;
 220                 } else {
 221                         err = -1;
 222                 }
 223                 g_free(tmp->syscall_info);
 224                 tmp->syscall_info = NULL;
 225         }
 226         return err;
 227 }
 228
 229 struct syscalls *create_syscall_info(unsigned int type, uint64_t cpu_id,
 230                 unsigned int tid, int fd)
 231 {
 232         struct syscalls *syscall_info;
 233
 234         syscall_info = g_new0(struct syscalls, 1);
 235         syscall_info->type = type;
 236         syscall_info->cpu_id = cpu_id;
 237         syscall_info->tid = tid;
 238         syscall_info->fd = fd;
 239
 240         return syscall_info;
 241 }
 242
 243 struct file_history *create_file(struct file_history *history, char *file_name)
 244 {
 245         struct files *new_file;
 246         struct file_history *new_history;
 247
 248         new_file = g_new0(struct files, 1);
 249         new_history = g_new0(struct file_history, 1);
 250         new_file->name = strdup(file_name);
 251         new_file->read = 0;
 252         new_file->write = 0;
 253         new_file->flag = -1;
 254         new_history->file = new_file;
 255         new_history->next = history;
 256
 257         return new_history;
 258 }
 259
 260 enum bt_cb_ret handle_exit_syscall(struct bt_ctf_event *call_data,
 261                 void *private_data)
 262 {
 263         const struct definition *scope;
 264         unsigned long timestamp;
 265         char *comm;
 266         uint64_t ret, tid;
 267         uint64_t cpu_id;
 268
 269         timestamp = bt_ctf_get_timestamp(call_data);
 270         if (timestamp == -1ULL)
 271                 goto error;
 272
 273         comm = get_context_comm(call_data);
 274         tid = get_context_tid(call_data);
 275
 276         scope = bt_ctf_get_top_level_scope(call_data,
 277                         BT_EVENT_FIELDS);
 278         ret = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 279                                 scope, "_ret"));
 280         if (bt_ctf_field_get_error()) {
 281                 fprintf(stderr, "Missing ret context info\n");
 282                 goto error;
 283         }
 284
 285         cpu_id = get_cpu_id(call_data);
 286
 287         /*
 288          * if we encounter an exit_syscall and
 289          * it is not for a syscall read or write
 290          * we just abort the execution of this callback
 291          */
 292         if ((update_iostream_ret(&lttngtop, tid, comm, timestamp, cpu_id, ret)) < 0)
 293                 return BT_CB_ERROR_CONTINUE;
 294
 295         return BT_CB_OK;
 296
 297 error:
 298         return BT_CB_ERROR_STOP;
 299 }
 300
 301
 302 enum bt_cb_ret handle_sys_write(struct bt_ctf_event *call_data,
 303                 void *private_data)
 304 {
 305         const struct definition *scope;
 306         struct processtop *tmp;
 307         unsigned long timestamp;
 308         uint64_t cpu_id;
 309         int64_t tid;
 310         char *procname;
 311         int fd;
 312
 313         timestamp = bt_ctf_get_timestamp(call_data);
 314         if (timestamp == -1ULL)
 315                 goto error;
 316
 317         tid = get_context_tid(call_data);
 318         cpu_id = get_cpu_id(call_data);
 319
 320         procname = get_context_comm(call_data);
 321
 322         scope = bt_ctf_get_top_level_scope(call_data,
 323                         BT_EVENT_FIELDS);
 324         fd = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
 325                                 scope, "_fd"));
 326         if (bt_ctf_field_get_error()) {
 327                 fprintf(stderr, "Missing fd context info\n");
 328                 goto error;
 329         }
 330
 331         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 332         tmp->syscall_info = create_syscall_info(__NR_write, cpu_id, tid, fd);
 333
 334         insert_file(tmp, fd);
 335
 336         return BT_CB_OK;
 337
 338 error:
 339         return BT_CB_ERROR_STOP;
 340 }
 341
 342 enum bt_cb_ret handle_sys_read(struct bt_ctf_event *call_data,
 343                 void *private_data)
 344 {
 345         struct processtop *tmp;
 346         const struct definition *scope;
 347         unsigned long timestamp;
 348         uint64_t cpu_id;
 349         int64_t tid;
 350         char *procname;
 351         int fd;
 352
 353         timestamp = bt_ctf_get_timestamp(call_data);
 354         if (timestamp == -1ULL)
 355                 goto error;
 356
 357         tid = get_context_tid(call_data);
 358         cpu_id = get_cpu_id(call_data);
 359
 360         procname = get_context_comm(call_data);
 361
 362         scope = bt_ctf_get_top_level_scope(call_data,
 363                         BT_EVENT_FIELDS);
 364         fd = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
 365                                 scope, "_fd"));
 366         if (bt_ctf_field_get_error()) {
 367                 fprintf(stderr, "Missing fd context info\n");
 368                 goto error;
 369         }
 370
 371         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 372         tmp->syscall_info = create_syscall_info(__NR_read, cpu_id, tid, fd);
 373
 374         insert_file(tmp, fd);
 375
 376         return BT_CB_OK;
 377
 378 error:
 379         return BT_CB_ERROR_STOP;
 380 }
 381
 382
 383 enum bt_cb_ret handle_sys_open(struct bt_ctf_event *call_data,
 384                 void *private_data)
 385 {
 386
 387         struct processtop *tmp;
 388         const struct definition *scope;
 389         unsigned long timestamp;
 390         uint64_t cpu_id;
 391         int64_t tid;
 392         char *procname;
 393         char *file;
 394
 395         timestamp = bt_ctf_get_timestamp(call_data);
 396         if (timestamp == -1ULL)
 397                 goto error;
 398
 399         tid = get_context_tid(call_data);
 400         cpu_id = get_cpu_id(call_data);
 401
 402         procname = get_context_comm(call_data);
 403
 404         scope = bt_ctf_get_top_level_scope(call_data,
 405                         BT_EVENT_FIELDS);
 406         file = bt_ctf_get_string(bt_ctf_get_field(call_data,
 407                                 scope, "_filename"));
 408         if (bt_ctf_field_get_error()) {
 409                 fprintf(stderr, "Missing file name context info\n");
 410                 goto error;
 411         }
 412
 413         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 414         tmp->syscall_info = create_syscall_info(__NR_open, cpu_id, tid, -1);
 415
 416         tmp->files_history = create_file(tmp->files_history, file);
 417
 418         return BT_CB_OK;
 419
 420 error:
 421         return BT_CB_ERROR_STOP;
 422 }
 423
 424
 425 enum bt_cb_ret handle_sys_close(struct bt_ctf_event *call_data,
 426                 void *private_data)
 427 {
 428         const struct definition *scope;
 429         struct processtop *tmp;
 430         unsigned long timestamp;
 431         int64_t tid;
 432         char *procname;
 433         int fd;
 434
 435         timestamp = bt_ctf_get_timestamp(call_data);
 436         if (timestamp == -1ULL)
 437                 goto error;
 438
 439         tid = get_context_tid(call_data);
 440
 441         procname = get_context_comm(call_data);
 442
 443         scope = bt_ctf_get_top_level_scope(call_data,
 444                         BT_EVENT_FIELDS);
 445         fd = bt_ctf_get_uint64(bt_ctf_get_field(call_data,
 446                                 scope, "_fd"));
 447         if (bt_ctf_field_get_error()) {
 448                 fprintf(stderr, "Missing fd context info\n");
 449                 goto error;
 450         }
 451
 452         tmp = get_proc(&lttngtop, tid, procname, timestamp);
 453
 454         close_file(tmp, fd);
 455
 456         return BT_CB_OK;
 457
 458 error:
 459         return BT_CB_ERROR_STOP;
 460 }
 461
 462 enum bt_cb_ret handle_statedump_file_descriptor(struct bt_ctf_event *call_data,
 463                 void *private_data)
 464 {
 465         const struct definition *scope;
 466         struct processtop *parent;
 467         struct files *file;
 468         unsigned long timestamp;
 469         int64_t pid;
 470         char *file_name;
 471         int fd;
 472
 473         timestamp = bt_ctf_get_timestamp(call_data);
 474         if (timestamp == -1ULL)
 475                 goto error;
 476
 477         scope = bt_ctf_get_top_level_scope(call_data,
 478                          BT_EVENT_FIELDS);
 479         pid = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 480                              scope, "_pid"));
 481         if (bt_ctf_field_get_error()) {
 482                 fprintf(stderr, "Missing tid context info\n");
 483                 goto error;
 484         }
 485
 486         scope = bt_ctf_get_top_level_scope(call_data,
 487                         BT_EVENT_FIELDS);
 488         fd = bt_ctf_get_int64(bt_ctf_get_field(call_data,
 489                                 scope, "_fd"));
 490         if (bt_ctf_field_get_error()) {
 491                 fprintf(stderr, "Missing fd context info\n");
 492                 goto error;
 493         }
 494
 495         scope = bt_ctf_get_top_level_scope(call_data,
 496                         BT_EVENT_FIELDS);
 497         file_name = bt_ctf_get_string(bt_ctf_get_field(call_data,
 498                                 scope, "_filename"));
 499         if (bt_ctf_field_get_error()) {
 500                 fprintf(stderr, "Missing file name context info\n");
 501                 goto error;
 502         }
 503
 504         parent = get_proc_pid(&lttngtop, pid, pid, timestamp);
 505         parent->files_history = create_file(parent->files_history, file_name);
 506         file = parent->files_history->file;
 507         edit_file(parent, file, fd);
 508
 509         return BT_CB_OK;
 510
 511 error:
 512         return BT_CB_ERROR_STOP;
 513 }