src/iostreamtop.c

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