check_debug.c

   1 /*
   2  * Copyright (C) 2009 Dan Carpenter.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
  16  */
  17
  18 #include <string.h>
  19
  20 #include "smatch.h"
  21 #include "smatch_slist.h"
  22 #include "smatch_extra.h"
  23
  24 void show_sname_alloc(void);
  25 void show_data_range_alloc(void);
  26 void show_ptrlist_alloc(void);
  27 void show_rl_ptrlist_alloc(void);
  28 void show_sm_state_alloc(void);
  29
  30 int local_debug;
  31 static int my_id;
  32 char *trace_variable;
  33
  34 static void match_all_values(const char *fn, struct expression *expr, void *info)
  35 {
  36         struct stree *stree;
  37
  38         stree = get_all_states_stree(SMATCH_EXTRA);
  39         __print_stree(stree);
  40         free_stree(&stree);
  41 }
  42
  43 static void match_cur_stree(const char *fn, struct expression *expr, void *info)
  44 {
  45         __print_cur_stree();
  46 }
  47
  48 static void match_state(const char *fn, struct expression *expr, void *info)
  49 {
  50         struct expression *check_arg, *state_arg;
  51         struct sm_state *sm;
  52         int found = 0;
  53
  54         check_arg = get_argument_from_call_expr(expr->args, 0);
  55         if (check_arg->type != EXPR_STRING) {
  56                 sm_error("the check_name argument to %s is supposed to be a string literal", fn);
  57                 return;
  58         }
  59         state_arg = get_argument_from_call_expr(expr->args, 1);
  60         if (!state_arg || state_arg->type != EXPR_STRING) {
  61                 sm_error("the state_name argument to %s is supposed to be a string literal", fn);
  62                 return;
  63         }
  64
  65         FOR_EACH_SM(__get_cur_stree(), sm) {
  66                 if (strcmp(check_name(sm->owner), check_arg->string->data) != 0)
  67                         continue;
  68                 if (strcmp(sm->name, state_arg->string->data) != 0)
  69                         continue;
  70                 sm_msg("'%s' = '%s'", sm->name, sm->state->name);
  71                 found = 1;
  72         } END_FOR_EACH_SM(sm);
  73
  74         if (!found)
  75                 sm_msg("%s '%s' not found", check_arg->string->data, state_arg->string->data);
  76 }
  77
  78 static void match_states(const char *fn, struct expression *expr, void *info)
  79 {
  80         struct expression *check_arg;
  81
  82         check_arg = get_argument_from_call_expr(expr->args, 0);
  83         if (check_arg->type != EXPR_STRING) {
  84                 sm_error("the check_name argument to %s is supposed to be a string literal", fn);
  85                 return;
  86         }
  87
  88         if (__print_states(check_arg->string->data))
  89                 return;
  90
  91         if (!id_from_name(check_arg->string->data))
  92                 sm_msg("invalid check name '%s'", check_arg->string->data);
  93         else
  94                 sm_msg("%s: no states", check_arg->string->data);
  95 }
  96
  97 static void match_print_value(const char *fn, struct expression *expr, void *info)
  98 {
  99         struct stree *stree;
 100         struct sm_state *tmp;
 101         struct expression *arg_expr;
 102
 103         arg_expr = get_argument_from_call_expr(expr->args, 0);
 104         if (arg_expr->type != EXPR_STRING) {
 105                 sm_error("the argument to %s is supposed to be a string literal", fn);
 106                 return;
 107         }
 108
 109         stree = __get_cur_stree();
 110         FOR_EACH_MY_SM(SMATCH_EXTRA, stree, tmp) {
 111                 if (!strcmp(tmp->name, arg_expr->string->data))
 112                         sm_msg("%s = %s", tmp->name, tmp->state->name);
 113         } END_FOR_EACH_SM(tmp);
 114 }
 115
 116 static void match_print_known(const char *fn, struct expression *expr, void *info)
 117 {
 118         struct expression *arg;
 119         struct range_list *rl = NULL;
 120         char *name;
 121         int known = 0;
 122         sval_t sval;
 123
 124         arg = get_argument_from_call_expr(expr->args, 0);
 125         if (get_value(arg, &sval))
 126                 known = 1;
 127
 128         get_implied_rl(arg, &rl);
 129
 130         name = expr_to_str(arg);
 131         sm_msg("known: '%s' = '%s'.  implied = '%s'", name, known ? sval_to_str(sval) : "<unknown>", show_rl(rl));
 132         free_string(name);
 133 }
 134
 135 static void match_print_implied(const char *fn, struct expression *expr, void *info)
 136 {
 137         struct expression *arg;
 138         struct range_list *rl = NULL;
 139         char *name;
 140
 141         arg = get_argument_from_call_expr(expr->args, 0);
 142         get_implied_rl(arg, &rl);
 143
 144         name = expr_to_str(arg);
 145         sm_msg("implied: %s = '%s'", name, show_rl(rl));
 146         free_string(name);
 147 }
 148
 149 static void match_real_absolute(const char *fn, struct expression *expr, void *info)
 150 {
 151         struct expression *arg;
 152         struct range_list *rl = NULL;
 153         char *name;
 154
 155         arg = get_argument_from_call_expr(expr->args, 0);
 156         get_real_absolute_rl(arg, &rl);
 157
 158         name = expr_to_str(arg);
 159         sm_msg("real absolute: %s = '%s'", name, show_rl(rl));
 160         free_string(name);
 161 }
 162
 163 static void match_print_implied_min(const char *fn, struct expression *expr, void *info)
 164 {
 165         struct expression *arg;
 166         sval_t sval;
 167         char *name;
 168
 169         arg = get_argument_from_call_expr(expr->args, 0);
 170         name = expr_to_str(arg);
 171
 172         if (get_implied_min(arg, &sval))
 173                 sm_msg("implied min: %s = %s", name, sval_to_str(sval));
 174         else
 175                 sm_msg("implied min: %s = <unknown>", name);
 176
 177         free_string(name);
 178 }
 179
 180 static void match_print_implied_max(const char *fn, struct expression *expr, void *info)
 181 {
 182         struct expression *arg;
 183         sval_t sval;
 184         char *name;
 185
 186         arg = get_argument_from_call_expr(expr->args, 0);
 187         name = expr_to_str(arg);
 188
 189         if (get_implied_max(arg, &sval))
 190                 sm_msg("implied max: %s = %s", name, sval_to_str(sval));
 191         else
 192                 sm_msg("implied max: %s = <unknown>", name);
 193
 194         free_string(name);
 195 }
 196
 197 static void match_user_rl(const char *fn, struct expression *expr, void *info)
 198 {
 199         struct expression *arg;
 200         struct range_list *rl = NULL;
 201         bool capped = false;
 202         char *name;
 203
 204         if (option_project != PROJ_KERNEL)
 205                 sm_msg("no user data for project = '%s'", option_project_str);
 206
 207         arg = get_argument_from_call_expr(expr->args, 0);
 208         name = expr_to_str(arg);
 209
 210         get_user_rl(arg, &rl);
 211         if (rl)
 212                 capped = user_rl_capped(arg);
 213         sm_msg("user rl: '%s' = '%s'%s", name, show_rl(rl), capped ? " (capped)" : "");
 214
 215         free_string(name);
 216 }
 217
 218 static void match_capped(const char *fn, struct expression *expr, void *info)
 219 {
 220         struct expression *arg;
 221         char *name;
 222
 223         arg = get_argument_from_call_expr(expr->args, 0);
 224         name = expr_to_str(arg);
 225         sm_msg("'%s' = '%s'", name, is_capped(arg) ? "capped" : "not capped");
 226         free_string(name);
 227 }
 228
 229 static void match_print_hard_max(const char *fn, struct expression *expr, void *info)
 230 {
 231         struct expression *arg;
 232         sval_t sval;
 233         char *name;
 234
 235         arg = get_argument_from_call_expr(expr->args, 0);
 236         name = expr_to_str(arg);
 237
 238         if (get_hard_max(arg, &sval))
 239                 sm_msg("hard max: %s = %s", name, sval_to_str(sval));
 240         else
 241                 sm_msg("hard max: %s = <unknown>", name);
 242
 243         free_string(name);
 244 }
 245
 246 static void match_print_fuzzy_max(const char *fn, struct expression *expr, void *info)
 247 {
 248         struct expression *arg;
 249         sval_t sval;
 250         char *name;
 251
 252         arg = get_argument_from_call_expr(expr->args, 0);
 253         name = expr_to_str(arg);
 254
 255         if (get_fuzzy_max(arg, &sval))
 256                 sm_msg("fuzzy max: %s = %s", name, sval_to_str(sval));
 257         else
 258                 sm_msg("fuzzy max: %s = <unknown>", name);
 259
 260         free_string(name);
 261 }
 262
 263 static void match_print_absolute(const char *fn, struct expression *expr, void *info)
 264 {
 265         struct expression *arg;
 266         struct range_list *rl;
 267         char *name;
 268
 269         arg = get_argument_from_call_expr(expr->args, 0);
 270         name = expr_to_str(arg);
 271
 272         get_absolute_rl(arg, &rl);
 273         sm_msg("absolute: %s = %s", name, show_rl(rl));
 274
 275         free_string(name);
 276 }
 277
 278 static void match_print_absolute_min(const char *fn, struct expression *expr, void *info)
 279 {
 280         struct expression *arg;
 281         sval_t sval;
 282         char *name;
 283
 284         arg = get_argument_from_call_expr(expr->args, 0);
 285         name = expr_to_str(arg);
 286
 287         if (get_absolute_min(arg, &sval))
 288                 sm_msg("absolute min: %s = %s", name, sval_to_str(sval));
 289         else
 290                 sm_msg("absolute min: %s = <unknown>", name);
 291
 292         free_string(name);
 293 }
 294
 295 static void match_print_absolute_max(const char *fn, struct expression *expr, void *info)
 296 {
 297         struct expression *arg;
 298         sval_t sval;
 299         char *name;
 300
 301         arg = get_argument_from_call_expr(expr->args, 0);
 302         get_absolute_max(arg, &sval);
 303
 304         name = expr_to_str(arg);
 305         sm_msg("absolute max: %s = %s", name, sval_to_str(sval));
 306         free_string(name);
 307 }
 308
 309 static void match_sval_info(const char *fn, struct expression *expr, void *info)
 310 {
 311         struct expression *arg;
 312         sval_t sval;
 313         char *name;
 314
 315         arg = get_argument_from_call_expr(expr->args, 0);
 316         name = expr_to_str(arg);
 317
 318         if (!get_implied_value(arg, &sval)) {
 319                 sm_msg("no sval for '%s'", name);
 320                 goto free;
 321         }
 322
 323         sm_msg("implied: %s %c%d ->value = %llx", name, sval_unsigned(sval) ? 'u' : 's', sval_bits(sval), sval.value);
 324 free:
 325         free_string(name);
 326 }
 327
 328 static void match_member_name(const char *fn, struct expression *expr, void *info)
 329 {
 330         struct expression *arg;
 331         char *name, *member_name;
 332
 333         arg = get_argument_from_call_expr(expr->args, 0);
 334         name = expr_to_str(arg);
 335         member_name = get_member_name(arg);
 336         sm_msg("member name: '%s => %s'", name, member_name);
 337         free_string(member_name);
 338         free_string(name);
 339 }
 340
 341 static void print_possible(struct sm_state *sm)
 342 {
 343         struct sm_state *tmp;
 344
 345         sm_msg("Possible values for %s", sm->name);
 346         FOR_EACH_PTR(sm->possible, tmp) {
 347                 printf("%s\n", tmp->state->name);
 348         } END_FOR_EACH_PTR(tmp);
 349         sm_msg("===");
 350 }
 351
 352 static void match_possible(const char *fn, struct expression *expr, void *info)
 353 {
 354         struct stree *stree;
 355         struct sm_state *tmp;
 356         struct expression *arg_expr;
 357
 358         arg_expr = get_argument_from_call_expr(expr->args, 0);
 359         if (arg_expr->type != EXPR_STRING) {
 360                 sm_error("the argument to %s is supposed to be a string literal", fn);
 361                 return;
 362         }
 363
 364         stree = __get_cur_stree();
 365         FOR_EACH_MY_SM(SMATCH_EXTRA, stree, tmp) {
 366                 if (!strcmp(tmp->name, arg_expr->string->data))
 367                         print_possible(tmp);
 368         } END_FOR_EACH_SM(tmp);
 369 }
 370
 371 static void match_strlen(const char *fn, struct expression *expr, void *info)
 372 {
 373         struct expression *arg;
 374         struct range_list *rl;
 375         char *name;
 376
 377         arg = get_argument_from_call_expr(expr->args, 0);
 378         get_implied_strlen(arg, &rl);
 379
 380         name = expr_to_str(arg);
 381         sm_msg("strlen: '%s' %s characters", name, show_rl(rl));
 382         free_string(name);
 383 }
 384
 385 static void match_buf_size(const char *fn, struct expression *expr, void *info)
 386 {
 387         struct expression *arg, *comp;
 388         struct range_list *rl;
 389         int elements, bytes;
 390         char *name;
 391         char buf[256] = "";
 392         int limit_type;
 393         int n;
 394         sval_t sval;
 395
 396         arg = get_argument_from_call_expr(expr->args, 0);
 397
 398         elements = get_array_size(arg);
 399         bytes = get_array_size_bytes_max(arg);
 400         rl = get_array_size_bytes_rl(arg);
 401         comp = get_size_variable(arg, &limit_type);
 402
 403         name = expr_to_str(arg);
 404         n = snprintf(buf, sizeof(buf), "buf size: '%s' %d elements, %d bytes", name, elements, bytes);
 405         free_string(name);
 406
 407         if (!rl_to_sval(rl, &sval))
 408                 n += snprintf(buf + n, sizeof(buf) - n, " (rl = %s)", show_rl(rl));
 409
 410         if (comp) {
 411                 name = expr_to_str(comp);
 412                 snprintf(buf + n, sizeof(buf) - n, "[size_var=%s %s]", limit_type_str(limit_type), name);
 413                 free_string(name);
 414         }
 415         sm_msg("%s", buf);
 416 }
 417
 418 static void match_note(const char *fn, struct expression *expr, void *info)
 419 {
 420         struct expression *arg_expr;
 421
 422         arg_expr = get_argument_from_call_expr(expr->args, 0);
 423         if (arg_expr->type != EXPR_STRING) {
 424                 sm_error("the argument to %s is supposed to be a string literal", fn);
 425                 return;
 426         }
 427         sm_msg("%s", arg_expr->string->data);
 428 }
 429
 430 static void print_related(struct sm_state *sm)
 431 {
 432         struct relation *rel;
 433
 434         if (!estate_related(sm->state))
 435                 return;
 436
 437         sm_prefix();
 438         sm_printf("%s: ", sm->name);
 439         FOR_EACH_PTR(estate_related(sm->state), rel) {
 440                 sm_printf("%s ", rel->name);
 441         } END_FOR_EACH_PTR(rel);
 442         sm_printf("\n");
 443 }
 444
 445 static void match_dump_related(const char *fn, struct expression *expr, void *info)
 446 {
 447         struct stree *stree;
 448         struct sm_state *tmp;
 449
 450         stree = __get_cur_stree();
 451         FOR_EACH_MY_SM(SMATCH_EXTRA, stree, tmp) {
 452                 print_related(tmp);
 453         } END_FOR_EACH_SM(tmp);
 454 }
 455
 456 static void match_compare(const char *fn, struct expression *expr, void *info)
 457 {
 458         struct expression *one, *two;
 459         char *one_name, *two_name;
 460         int comparison;
 461         char buf[16];
 462
 463         one = get_argument_from_call_expr(expr->args, 0);
 464         two = get_argument_from_call_expr(expr->args, 1);
 465
 466         comparison = get_comparison(one, two);
 467         if (!comparison)
 468                 snprintf(buf, sizeof(buf), "<none>");
 469         else
 470                 snprintf(buf, sizeof(buf), "%s", show_special(comparison));
 471
 472         one_name = expr_to_str(one);
 473         two_name = expr_to_str(two);
 474
 475         sm_msg("%s %s %s", one_name, buf, two_name);
 476
 477         free_string(one_name);
 478         free_string(two_name);
 479 }
 480
 481 static void match_debug_on(const char *fn, struct expression *expr, void *info)
 482 {
 483         option_debug = 1;
 484 }
 485
 486 static void match_debug_check(const char *fn, struct expression *expr, void *info)
 487 {
 488         struct expression *arg;
 489
 490         arg = get_argument_from_call_expr(expr->args, 0);
 491         if (!arg || arg->type != EXPR_STRING)
 492                 return;
 493         option_debug_check = arg->string->data;
 494         sm_msg("arg = '%s'", option_debug_check);
 495 }
 496
 497 static void match_debug_var(const char *fn, struct expression *expr, void *info)
 498 {
 499         struct expression *arg;
 500
 501         arg = get_argument_from_call_expr(expr->args, 0);
 502         if (!arg || arg->type != EXPR_STRING)
 503                 return;
 504         option_debug_var = arg->string->data;
 505         sm_msg("debug var = '%s'", option_debug_var);
 506 }
 507
 508 static void match_debug_off(const char *fn, struct expression *expr, void *info)
 509 {
 510         option_debug_check = NULL;
 511         option_debug_var = NULL;
 512         option_debug = 0;
 513 }
 514
 515 static void match_local_debug_on(const char *fn, struct expression *expr, void *info)
 516 {
 517         local_debug = 1;
 518 }
 519
 520 static void match_local_debug_off(const char *fn, struct expression *expr, void *info)
 521 {
 522         local_debug = 0;
 523 }
 524
 525 static void match_debug_db_on(const char *fn, struct expression *expr, void *info)
 526 {
 527         debug_db = 1;
 528 }
 529
 530 static void match_debug_db_off(const char *fn, struct expression *expr, void *info)
 531 {
 532         debug_db = 0;
 533 }
 534
 535 static void match_debug_implied_on(const char *fn, struct expression *expr, void *info)
 536 {
 537         implied_debug = true;
 538 }
 539
 540 static void match_debug_implied_off(const char *fn, struct expression *expr, void *info)
 541 {
 542         implied_debug = false;
 543 }
 544
 545 static void mtag_info(struct expression *expr)
 546 {
 547         mtag_t tag = 0;
 548         int offset = 0;
 549         struct range_list *rl = NULL;
 550
 551         expr_to_mtag_offset(expr, &tag, &offset);
 552         get_mtag_rl(expr, &rl);
 553         sm_msg("mtag = %llu offset = %d rl = '%s'", tag, offset, show_rl(rl));
 554 }
 555
 556 static void match_about(const char *fn, struct expression *expr, void *info)
 557 {
 558         struct expression *arg;
 559         struct range_list *rl;
 560         struct sm_state *sm;
 561         char *name;
 562
 563         sm_msg("---- about ----");
 564         match_print_implied(fn, expr, NULL);
 565         match_buf_size(fn, expr, NULL);
 566         match_strlen(fn, expr, NULL);
 567         match_real_absolute(fn, expr, NULL);
 568         mtag_info(expr);
 569
 570         arg = get_argument_from_call_expr(expr->args, 0);
 571         name = expr_to_str(arg);
 572         if (!name) {
 573                 sm_msg("info: not a straight forward variable.");
 574                 return;
 575         }
 576
 577         if (get_user_rl(arg, &rl))
 578                 sm_msg("user_rl = '%s'", show_rl(rl));
 579         if (points_to_user_data(arg))
 580                 sm_msg("points to user data");
 581
 582         FOR_EACH_SM(__get_cur_stree(), sm) {
 583                 if (strcmp(sm->name, name) != 0)
 584                         continue;
 585                 sm_msg("%s", show_sm(sm));
 586         } END_FOR_EACH_SM(sm);
 587 }
 588
 589 static void match_intersection(const char *fn, struct expression *expr, void *info)
 590 {
 591         struct expression *one, *two;
 592         struct range_list *one_rl, *two_rl;
 593         struct range_list *res;
 594
 595         one = get_argument_from_call_expr(expr->args, 0);
 596         two = get_argument_from_call_expr(expr->args, 1);
 597
 598         get_absolute_rl(one, &one_rl);
 599         get_absolute_rl(two, &two_rl);
 600
 601         res = rl_intersection(one_rl, two_rl);
 602         sm_msg("'%s' intersect '%s' is '%s'", show_rl(one_rl), show_rl(two_rl), show_rl(res));
 603 }
 604
 605 static void match_type(const char *fn, struct expression *expr, void *info)
 606 {
 607         struct expression *one;
 608         struct symbol *type;
 609         char *name;
 610
 611         one = get_argument_from_call_expr(expr->args, 0);
 612         type = get_type(one);
 613         name = expr_to_str(one);
 614         sm_msg("type of '%s' is: '%s'", name, type_to_str(type));
 615         free_string(name);
 616 }
 617
 618 static int match_type_rl_return(struct expression *call, void *unused, struct range_list **rl)
 619 {
 620         struct expression *one, *two;
 621         struct symbol *type;
 622
 623         one = get_argument_from_call_expr(call->args, 0);
 624         type = get_type(one);
 625
 626         two = get_argument_from_call_expr(call->args, 1);
 627         if (!two || two->type != EXPR_STRING) {
 628                 sm_msg("expected: __smatch_type_rl(type, \"string\")");
 629                 return 0;
 630         }
 631         call_results_to_rl(call, type, two->string->data, rl);
 632         return 1;
 633 }
 634
 635 static void print_left_right(struct sm_state *sm)
 636 {
 637         if (!sm)
 638                 return;
 639         if (!sm->left && !sm->right)
 640                 return;
 641
 642         sm_printf("[ ");
 643         if (sm->left)
 644                 sm_printf("(%d: %s->'%s')", get_stree_id(sm->left->pool),  sm->left->name, sm->left->state->name);
 645         else
 646                 sm_printf(" - ");
 647
 648
 649         print_left_right(sm->left);
 650
 651         if (sm->right)
 652                 sm_printf("(%d: %s->'%s')", get_stree_id(sm->right->pool),  sm->right->name, sm->right->state->name);
 653         else
 654                 sm_printf(" - ");
 655
 656         print_left_right(sm->right);
 657 }
 658
 659 static void match_print_merge_tree(const char *fn, struct expression *expr, void *info)
 660 {
 661         struct sm_state *sm;
 662         struct expression *arg;
 663         char *name;
 664
 665         arg = get_argument_from_call_expr(expr->args, 0);
 666         name = expr_to_str(arg);
 667
 668         sm = get_sm_state_expr(SMATCH_EXTRA, arg);
 669         if (!sm) {
 670                 sm_msg("no sm state for '%s'", name);
 671                 goto free;
 672         }
 673
 674         sm_prefix();
 675         sm_printf("merge tree: %s -> %s", name, sm->state->name);
 676         print_left_right(sm);
 677         sm_printf("\n");
 678
 679 free:
 680         free_string(name);
 681 }
 682
 683 static void match_print_stree_id(const char *fn, struct expression *expr, void *info)
 684 {
 685         sm_msg("stree_id %d", __stree_id);
 686 }
 687
 688 static void match_bits(const char *fn, struct expression *expr, void *_unused)
 689 {
 690         struct expression *arg;
 691         struct bit_info *info;
 692         char *name;
 693
 694         arg = get_argument_from_call_expr(expr->args, 0);
 695         name = expr_to_str(arg);
 696
 697         info = get_bit_info(arg);
 698
 699         sm_msg("bit info '%s': definitely set 0x%llx.  possibly set 0x%llx.",
 700                name, info->set, info->possible);
 701 }
 702
 703 static void match_mtag(const char *fn, struct expression *expr, void *info)
 704 {
 705         struct expression *arg;
 706         char *name;
 707         mtag_t tag = 0;
 708         int offset = 0;
 709
 710         arg = get_argument_from_call_expr(expr->args, 0);
 711         name = expr_to_str(arg);
 712         expr_to_mtag_offset(arg, &tag, &offset);
 713         sm_msg("mtag: '%s' => tag: %llu %d", name, tag, offset);
 714         free_string(name);
 715 }
 716
 717 static void match_mtag_data_offset(const char *fn, struct expression *expr, void *info)
 718 {
 719         struct expression *arg;
 720         char *name;
 721         mtag_t tag = 0;
 722         int offset = -1;
 723
 724         arg = get_argument_from_call_expr(expr->args, 0);
 725         name = expr_to_str(arg);
 726         expr_to_mtag_offset(arg, &tag, &offset);
 727         sm_msg("mtag: '%s' => tag: %lld, offset: %d", name, tag, offset);
 728         free_string(name);
 729 }
 730
 731 static void match_container(const char *fn, struct expression *expr, void *info)
 732 {
 733         struct expression *container, *x;
 734         char *cont, *name, *str;
 735
 736         container = get_argument_from_call_expr(expr->args, 0);
 737         x = get_argument_from_call_expr(expr->args, 1);
 738
 739         str = get_container_name(container, x);
 740         cont = expr_to_str(container);
 741         name = expr_to_str(x);
 742         sm_msg("container: '%s' vs '%s' --> '%s'", cont, name, str);
 743         free_string(cont);
 744         free_string(name);
 745 }
 746
 747 static struct timeval debug_timer;
 748 static void match_timer_start(const char *fn, struct expression *expr, void *info)
 749 {
 750         gettimeofday(&debug_timer, NULL);
 751 }
 752
 753 static void match_timer_stop(const char *fn, struct expression *expr, void *info)
 754 {
 755         struct timeval stop;
 756         long sec, usec, msec;
 757
 758         gettimeofday(&stop, NULL);
 759
 760         sec = stop.tv_sec - debug_timer.tv_sec;
 761         usec = stop.tv_usec - debug_timer.tv_usec;
 762         msec = sec * 1000 + usec / 1000;
 763
 764         sm_msg("timer: %ld msec", msec);
 765         gettimeofday(&debug_timer, NULL);
 766 }
 767
 768 static void match_expr(const char *fn, struct expression *expr, void *info)
 769 {
 770         struct expression *arg, *str, *new;
 771         char *name, *new_name;
 772
 773         str = get_argument_from_call_expr(expr->args, 0);
 774         arg = get_argument_from_call_expr(expr->args, 1);
 775         if (!arg || !str)
 776                 return;
 777
 778         if (str->type != EXPR_STRING)
 779                 return;
 780
 781         new = gen_expression_from_key(arg, str->string->data);
 782         name = expr_to_str(arg);
 783         new_name = expr_to_str(new);
 784
 785         sm_msg("str = '%s', arg = '%s' expr = '%s'", str->string->data, name, new_name);
 786
 787         free_string(new_name);
 788         free_string(name);
 789 }
 790 static void match_state_count(const char *fn, struct expression *expr, void *info)
 791 {
 792         sm_msg("state_count = %d\n", sm_state_counter);
 793 }
 794
 795 static void match_mem(const char *fn, struct expression *expr, void *info)
 796 {
 797         show_sname_alloc();
 798         show_data_range_alloc();
 799         show_rl_ptrlist_alloc();
 800         show_ptrlist_alloc();
 801         sm_msg("%lu pools", get_pool_count());
 802         sm_msg("%d strees", unfree_stree);
 803         show_smatch_state_alloc();
 804         show_sm_state_alloc();
 805 }
 806
 807 static void match_exit(const char *fn, struct expression *expr, void *info)
 808 {
 809         exit(0);
 810 }
 811
 812 static struct stree *old_stree;
 813 static void trace_var(struct statement *stmt)
 814 {
 815         struct sm_state *sm, *old;
 816         int printed = 0;
 817
 818         if (!trace_variable)
 819                 return;
 820         if (__inline_fn)
 821                 return;
 822
 823         FOR_EACH_SM(__get_cur_stree(), sm) {
 824                 if (strcmp(sm->name, trace_variable) != 0)
 825                         continue;
 826                 old = get_sm_state_stree(old_stree, sm->owner, sm->name, sm->sym);
 827                 if (old && old->state == sm->state)
 828                         continue;
 829                 sm_msg("[%d] %s '%s': '%s' => '%s'", stmt->type,
 830                        check_name(sm->owner),
 831                        sm->name, old ? old->state->name : "<none>", sm->state->name);
 832                 printed = 1;
 833         } END_FOR_EACH_SM(sm);
 834
 835         if (printed) {
 836                 free_stree(&old_stree);
 837                 old_stree = clone_stree(__get_cur_stree());
 838         }
 839 }
 840
 841 static void free_old_stree(struct symbol *sym)
 842 {
 843         free_stree(&old_stree);
 844 }
 845
 846 void check_debug(int id)
 847 {
 848         my_id = id;
 849         add_function_hook("__smatch_about", &match_about, NULL);
 850         add_function_hook("__smatch_all_values", &match_all_values, NULL);
 851         add_function_hook("__smatch_state", &match_state, NULL);
 852         add_function_hook("__smatch_states", &match_states, NULL);
 853         add_function_hook("__smatch_value", &match_print_value, NULL);
 854         add_function_hook("__smatch_known", &match_print_known, NULL);
 855         add_function_hook("__smatch_implied", &match_print_implied, NULL);
 856         add_function_hook("__smatch_implied_min", &match_print_implied_min, NULL);
 857         add_function_hook("__smatch_implied_max", &match_print_implied_max, NULL);
 858         add_function_hook("__smatch_user_rl", &match_user_rl, NULL);
 859         add_function_hook("__smatch_capped", &match_capped, NULL);
 860         add_function_hook("__smatch_hard_max", &match_print_hard_max, NULL);
 861         add_function_hook("__smatch_fuzzy_max", &match_print_fuzzy_max, NULL);
 862         add_function_hook("__smatch_absolute", &match_print_absolute, NULL);
 863         add_function_hook("__smatch_absolute_min", &match_print_absolute_min, NULL);
 864         add_function_hook("__smatch_absolute_max", &match_print_absolute_max, NULL);
 865         add_function_hook("__smatch_real_absolute", &match_real_absolute, NULL);
 866         add_function_hook("__smatch_sval_info", &match_sval_info, NULL);
 867         add_function_hook("__smatch_member_name", &match_member_name, NULL);
 868         add_function_hook("__smatch_possible", &match_possible, NULL);
 869         add_function_hook("__smatch_cur_stree", &match_cur_stree, NULL);
 870         add_function_hook("__smatch_strlen", &match_strlen, NULL);
 871         add_function_hook("__smatch_buf_size", &match_buf_size, NULL);
 872         add_function_hook("__smatch_note", &match_note, NULL);
 873         add_function_hook("__smatch_dump_related", &match_dump_related, NULL);
 874         add_function_hook("__smatch_compare", &match_compare, NULL);
 875         add_function_hook("__smatch_debug_on", &match_debug_on, NULL);
 876         add_function_hook("__smatch_debug_check", &match_debug_check, NULL);
 877         add_function_hook("__smatch_debug_var", &match_debug_var, NULL);
 878         add_function_hook("__smatch_debug_off", &match_debug_off, NULL);
 879         add_function_hook("__smatch_local_debug_on", &match_local_debug_on, NULL);
 880         add_function_hook("__smatch_local_debug_off", &match_local_debug_off, NULL);
 881         add_function_hook("__smatch_debug_db_on", &match_debug_db_on, NULL);
 882         add_function_hook("__smatch_debug_db_off", &match_debug_db_off, NULL);
 883         add_function_hook("__smatch_debug_implied_on", &match_debug_implied_on, NULL);
 884         add_function_hook("__smatch_debug_implied_off", &match_debug_implied_off, NULL);
 885         add_function_hook("__smatch_intersection", &match_intersection, NULL);
 886         add_function_hook("__smatch_type", &match_type, NULL);
 887         add_implied_return_hook("__smatch_type_rl_helper", &match_type_rl_return, NULL);
 888         add_function_hook("__smatch_merge_tree", &match_print_merge_tree, NULL);
 889         add_function_hook("__smatch_stree_id", &match_print_stree_id, NULL);
 890         add_function_hook("__smatch_bits", &match_bits, NULL);
 891         add_function_hook("__smatch_mtag", &match_mtag, NULL);
 892         add_function_hook("__smatch_mtag_data", &match_mtag_data_offset, NULL);
 893         add_function_hook("__smatch_expr", &match_expr, NULL);
 894         add_function_hook("__smatch_state_count", &match_state_count, NULL);
 895         add_function_hook("__smatch_mem", &match_mem, NULL);
 896         add_function_hook("__smatch_exit", &match_exit, NULL);
 897         add_function_hook("__smatch_container", &match_container, NULL);
 898         add_function_hook("__smatch_timer_start", &match_timer_start, NULL);
 899         add_function_hook("__smatch_timer_stop", &match_timer_stop, NULL);
 900
 901         add_hook(free_old_stree, AFTER_FUNC_HOOK);
 902         add_hook(trace_var, STMT_HOOK_AFTER);
 903 }