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