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_host_rl(const char *fn, struct expression *expr, void *info)
 219 {
 220        struct expression *arg;
 221        struct range_list *rl = NULL;
 222        struct sm_state *sm;
 223        bool capped = false;
 224        bool new = false;
 225        int host_id;
 226        char *name;
 227
 228        host_id = id_from_name("register_kernel_host_data");
 229        if (!host_id) {
 230                sm_msg("no host id");
 231                return;
 232        }
 233
 234        arg = get_argument_from_call_expr(expr->args, 0);
 235        name = expr_to_str(arg);
 236
 237        get_host_rl(arg, &rl);
 238        if (rl)
 239                capped = user_rl_capped(arg);
 240        sm = get_sm_state_expr(host_id, arg);
 241        if (sm && estate_new(sm->state))
 242                new = true;
 243
 244        sm_msg("host rl: '%s' = '%s'%s %s sm='%s'", name, show_rl(rl),
 245               capped ? " (capped)" : "",
 246               new ? "(new)" : "(old)",
 247               show_sm(sm));
 248
 249        free_string(name);
 250 }
 251
 252 static void match_capped(const char *fn, struct expression *expr, void *info)
 253 {
 254         struct expression *arg;
 255         char *name;
 256
 257         arg = get_argument_from_call_expr(expr->args, 0);
 258         name = expr_to_str(arg);
 259         sm_msg("'%s' = '%s'", name, is_capped(arg) ? "capped" : "not capped");
 260         free_string(name);
 261 }
 262
 263 static void match_print_hard_max(const char *fn, struct expression *expr, void *info)
 264 {
 265         struct expression *arg;
 266         sval_t sval;
 267         char *name;
 268
 269         arg = get_argument_from_call_expr(expr->args, 0);
 270         name = expr_to_str(arg);
 271
 272         if (get_hard_max(arg, &sval))
 273                 sm_msg("hard max: %s = %s", name, sval_to_str(sval));
 274         else
 275                 sm_msg("hard max: %s = <unknown>", name);
 276
 277         free_string(name);
 278 }
 279
 280 static void match_print_fuzzy_max(const char *fn, struct expression *expr, void *info)
 281 {
 282         struct expression *arg;
 283         sval_t sval;
 284         char *name;
 285
 286         arg = get_argument_from_call_expr(expr->args, 0);
 287         name = expr_to_str(arg);
 288
 289         if (get_fuzzy_max(arg, &sval))
 290                 sm_msg("fuzzy max: %s = %s", name, sval_to_str(sval));
 291         else
 292                 sm_msg("fuzzy max: %s = <unknown>", name);
 293
 294         free_string(name);
 295 }
 296
 297 static void match_print_absolute(const char *fn, struct expression *expr, void *info)
 298 {
 299         struct expression *arg;
 300         struct range_list *rl;
 301         char *name;
 302
 303         arg = get_argument_from_call_expr(expr->args, 0);
 304         name = expr_to_str(arg);
 305
 306         get_absolute_rl(arg, &rl);
 307         sm_msg("absolute: %s = %s", name, show_rl(rl));
 308
 309         free_string(name);
 310 }
 311
 312 static void match_print_absolute_min(const char *fn, struct expression *expr, void *info)
 313 {
 314         struct expression *arg;
 315         sval_t sval;
 316         char *name;
 317
 318         arg = get_argument_from_call_expr(expr->args, 0);
 319         name = expr_to_str(arg);
 320
 321         if (get_absolute_min(arg, &sval))
 322                 sm_msg("absolute min: %s = %s", name, sval_to_str(sval));
 323         else
 324                 sm_msg("absolute min: %s = <unknown>", name);
 325
 326         free_string(name);
 327 }
 328
 329 static void match_print_absolute_max(const char *fn, struct expression *expr, void *info)
 330 {
 331         struct expression *arg;
 332         sval_t sval;
 333         char *name;
 334
 335         arg = get_argument_from_call_expr(expr->args, 0);
 336         get_absolute_max(arg, &sval);
 337
 338         name = expr_to_str(arg);
 339         sm_msg("absolute max: %s = %s", name, sval_to_str(sval));
 340         free_string(name);
 341 }
 342
 343 static void match_sval_info(const char *fn, struct expression *expr, void *info)
 344 {
 345         struct expression *arg;
 346         sval_t sval;
 347         char *name;
 348
 349         arg = get_argument_from_call_expr(expr->args, 0);
 350         name = expr_to_str(arg);
 351
 352         if (!get_implied_value(arg, &sval)) {
 353                 sm_msg("no sval for '%s'", name);
 354                 goto free;
 355         }
 356
 357         sm_msg("implied: %s %c%d ->value = %llx", name, sval_unsigned(sval) ? 'u' : 's', sval_bits(sval), sval.value);
 358 free:
 359         free_string(name);
 360 }
 361
 362 static void match_member_name(const char *fn, struct expression *expr, void *info)
 363 {
 364         struct expression *arg;
 365         char *name, *member_name;
 366
 367         arg = get_argument_from_call_expr(expr->args, 0);
 368         name = expr_to_str(arg);
 369         member_name = get_member_name(arg);
 370         sm_msg("member name: '%s => %s'", name, member_name);
 371         free_string(member_name);
 372         free_string(name);
 373 }
 374
 375 static void print_possible(struct sm_state *sm)
 376 {
 377         struct sm_state *tmp;
 378
 379         sm_msg("Possible values for %s", sm->name);
 380         FOR_EACH_PTR(sm->possible, tmp) {
 381                 printf("%s\n", tmp->state->name);
 382         } END_FOR_EACH_PTR(tmp);
 383         sm_msg("===");
 384 }
 385
 386 static void match_possible(const char *fn, struct expression *expr, void *info)
 387 {
 388         struct stree *stree;
 389         struct sm_state *tmp;
 390         struct expression *arg_expr;
 391
 392         arg_expr = get_argument_from_call_expr(expr->args, 0);
 393         if (arg_expr->type != EXPR_STRING) {
 394                 sm_error("the argument to %s is supposed to be a string literal", fn);
 395                 return;
 396         }
 397
 398         stree = __get_cur_stree();
 399         FOR_EACH_MY_SM(SMATCH_EXTRA, stree, tmp) {
 400                 if (!strcmp(tmp->name, arg_expr->string->data))
 401                         print_possible(tmp);
 402         } END_FOR_EACH_SM(tmp);
 403 }
 404
 405 static void match_strlen(const char *fn, struct expression *expr, void *info)
 406 {
 407         struct expression *arg;
 408         struct range_list *rl;
 409         char *name;
 410
 411         arg = get_argument_from_call_expr(expr->args, 0);
 412         get_implied_strlen(arg, &rl);
 413
 414         name = expr_to_str(arg);
 415         sm_msg("strlen: '%s' %s characters", name, show_rl(rl));
 416         free_string(name);
 417 }
 418
 419 static void match_buf_size(const char *fn, struct expression *expr, void *info)
 420 {
 421         struct expression *arg, *comp;
 422         struct range_list *rl;
 423         int elements, bytes;
 424         char *name;
 425         char buf[256] = "";
 426         int limit_type;
 427         int n;
 428         sval_t sval;
 429
 430         arg = get_argument_from_call_expr(expr->args, 0);
 431
 432         elements = get_array_size(arg);
 433         bytes = get_array_size_bytes_max(arg);
 434         rl = get_array_size_bytes_rl(arg);
 435         comp = get_size_variable(arg, &limit_type);
 436
 437         name = expr_to_str(arg);
 438         n = snprintf(buf, sizeof(buf), "buf size: '%s' %d elements, %d bytes", name, elements, bytes);
 439         free_string(name);
 440
 441         if (!rl_to_sval(rl, &sval))
 442                 n += snprintf(buf + n, sizeof(buf) - n, " (rl = %s)", show_rl(rl));
 443
 444         if (comp) {
 445                 name = expr_to_str(comp);
 446                 snprintf(buf + n, sizeof(buf) - n, "[size_var=%s %s]", limit_type_str(limit_type), name);
 447                 free_string(name);
 448         }
 449         sm_msg("%s", buf);
 450 }
 451
 452 static void match_note(const char *fn, struct expression *expr, void *info)
 453 {
 454         struct expression *arg_expr;
 455
 456         arg_expr = get_argument_from_call_expr(expr->args, 0);
 457         if (arg_expr->type != EXPR_STRING) {
 458                 sm_error("the argument to %s is supposed to be a string literal", fn);
 459                 return;
 460         }
 461         sm_msg("%s", arg_expr->string->data);
 462 }
 463
 464 static void print_related(struct sm_state *sm)
 465 {
 466         struct relation *rel;
 467
 468         if (!estate_related(sm->state))
 469                 return;
 470
 471         sm_prefix();
 472         sm_printf("%s: ", sm->name);
 473         FOR_EACH_PTR(estate_related(sm->state), rel) {
 474                 sm_printf("%s ", rel->name);
 475         } END_FOR_EACH_PTR(rel);
 476         sm_printf("\n");
 477 }
 478
 479 static void match_dump_related(const char *fn, struct expression *expr, void *info)
 480 {
 481         struct stree *stree;
 482         struct sm_state *tmp;
 483
 484         stree = __get_cur_stree();
 485         FOR_EACH_MY_SM(SMATCH_EXTRA, stree, tmp) {
 486                 print_related(tmp);
 487         } END_FOR_EACH_SM(tmp);
 488 }
 489
 490 static void match_compare(const char *fn, struct expression *expr, void *info)
 491 {
 492         struct expression *one, *two;
 493         char *one_name, *two_name;
 494         int comparison;
 495         char buf[16];
 496
 497         one = get_argument_from_call_expr(expr->args, 0);
 498         two = get_argument_from_call_expr(expr->args, 1);
 499
 500         comparison = get_comparison(one, two);
 501         if (!comparison)
 502                 snprintf(buf, sizeof(buf), "<none>");
 503         else
 504                 snprintf(buf, sizeof(buf), "%s", show_special(comparison));
 505
 506         one_name = expr_to_str(one);
 507         two_name = expr_to_str(two);
 508
 509         sm_msg("%s %s %s", one_name, buf, two_name);
 510
 511         free_string(one_name);
 512         free_string(two_name);
 513 }
 514
 515 static void match_debug_on(const char *fn, struct expression *expr, void *info)
 516 {
 517         option_debug = 1;
 518 }
 519
 520 static void match_debug_check(const char *fn, struct expression *expr, void *info)
 521 {
 522         struct expression *arg;
 523
 524         arg = get_argument_from_call_expr(expr->args, 0);
 525         if (!arg || arg->type != EXPR_STRING)
 526                 return;
 527         option_debug_check = arg->string->data;
 528         sm_msg("arg = '%s'", option_debug_check);
 529 }
 530
 531 static void match_debug_var(const char *fn, struct expression *expr, void *info)
 532 {
 533         struct expression *arg;
 534
 535         arg = get_argument_from_call_expr(expr->args, 0);
 536         if (!arg || arg->type != EXPR_STRING)
 537                 return;
 538         option_debug_var = arg->string->data;
 539         sm_msg("debug var = '%s'", option_debug_var);
 540 }
 541
 542 static void match_debug_off(const char *fn, struct expression *expr, void *info)
 543 {
 544         option_debug_check = NULL;
 545         option_debug_var = NULL;
 546         option_debug = 0;
 547 }
 548
 549 static void match_local_debug_on(const char *fn, struct expression *expr, void *info)
 550 {
 551         local_debug = 1;
 552         option_print_names++;
 553 }
 554
 555 static void match_local_debug_off(const char *fn, struct expression *expr, void *info)
 556 {
 557         option_print_names--;
 558         local_debug = 0;
 559 }
 560
 561 static void match_debug_db_on(const char *fn, struct expression *expr, void *info)
 562 {
 563         debug_db = 1;
 564 }
 565
 566 static void match_debug_db_off(const char *fn, struct expression *expr, void *info)
 567 {
 568         debug_db = 0;
 569 }
 570
 571 static void match_debug_implied_on(const char *fn, struct expression *expr, void *info)
 572 {
 573         implied_debug = true;
 574 }
 575
 576 static void match_debug_implied_off(const char *fn, struct expression *expr, void *info)
 577 {
 578         implied_debug = false;
 579 }
 580
 581 static void mtag_info(struct expression *expr)
 582 {
 583         mtag_t tag = 0;
 584         int offset = 0;
 585         struct range_list *rl = NULL;
 586
 587         expr_to_mtag_offset(expr, &tag, &offset);
 588         get_mtag_rl(expr, &rl);
 589         sm_msg("mtag = %llu offset = %d rl = '%s'", tag, offset, show_rl(rl));
 590 }
 591
 592 static void match_about(const char *fn, struct expression *expr, void *info)
 593 {
 594         struct expression *arg;
 595         struct range_list *rl;
 596         struct sm_state *sm;
 597         char *name;
 598
 599         sm_msg("---- about ----");
 600         match_print_implied(fn, expr, NULL);
 601         match_buf_size(fn, expr, NULL);
 602         match_strlen(fn, expr, NULL);
 603         match_real_absolute(fn, expr, NULL);
 604         mtag_info(expr);
 605
 606         arg = get_argument_from_call_expr(expr->args, 0);
 607         name = expr_to_str(arg);
 608         if (!name) {
 609                 sm_msg("info: not a straight forward variable.");
 610                 return;
 611         }
 612
 613         if (get_user_rl(arg, &rl))
 614                 sm_msg("user_rl = '%s'", show_rl(rl));
 615         if (points_to_user_data(arg))
 616                 sm_msg("points to user data");
 617
 618         FOR_EACH_SM(__get_cur_stree(), sm) {
 619                 if (strcmp(sm->name, name) != 0)
 620                         continue;
 621                 sm_msg("%s", show_sm(sm));
 622         } END_FOR_EACH_SM(sm);
 623 }
 624
 625 static void match_intersection(const char *fn, struct expression *expr, void *info)
 626 {
 627         struct expression *one, *two;
 628         struct range_list *one_rl, *two_rl;
 629         struct range_list *res;
 630
 631         one = get_argument_from_call_expr(expr->args, 0);
 632         two = get_argument_from_call_expr(expr->args, 1);
 633
 634         get_absolute_rl(one, &one_rl);
 635         get_absolute_rl(two, &two_rl);
 636
 637         res = rl_intersection(one_rl, two_rl);
 638         sm_msg("'%s' intersect '%s' is '%s'", show_rl(one_rl), show_rl(two_rl), show_rl(res));
 639 }
 640
 641 static void match_type(const char *fn, struct expression *expr, void *info)
 642 {
 643         struct expression *one;
 644         struct symbol *type;
 645         char *name;
 646
 647         one = get_argument_from_call_expr(expr->args, 0);
 648         type = get_type(one);
 649         name = expr_to_str(one);
 650         sm_msg("type of '%s' is: '%s'", name, type_to_str(type));
 651         free_string(name);
 652 }
 653
 654 static int match_type_rl_return(struct expression *call, void *unused, struct range_list **rl)
 655 {
 656         struct expression *one, *two;
 657         struct symbol *type;
 658
 659         one = get_argument_from_call_expr(call->args, 0);
 660         type = get_type(one);
 661
 662         two = get_argument_from_call_expr(call->args, 1);
 663         if (!two || two->type != EXPR_STRING) {
 664                 sm_msg("expected: __smatch_type_rl(type, \"string\")");
 665                 return 0;
 666         }
 667         call_results_to_rl(call, type, two->string->data, rl);
 668         return 1;
 669 }
 670
 671 static void print_left_right(struct sm_state *sm)
 672 {
 673         if (!sm)
 674                 return;
 675         if (!sm->left && !sm->right)
 676                 return;
 677
 678         sm_printf("[ ");
 679         if (sm->left)
 680                 sm_printf("(%d: %s->'%s')", get_stree_id(sm->left->pool),  sm->left->name, sm->left->state->name);
 681         else
 682                 sm_printf(" - ");
 683
 684
 685         print_left_right(sm->left);
 686
 687         if (sm->right)
 688                 sm_printf("(%d: %s->'%s')", get_stree_id(sm->right->pool),  sm->right->name, sm->right->state->name);
 689         else
 690                 sm_printf(" - ");
 691
 692         print_left_right(sm->right);
 693 }
 694
 695 static void match_print_merge_tree(const char *fn, struct expression *expr, void *info)
 696 {
 697         struct sm_state *sm;
 698         struct expression *arg;
 699         char *name;
 700
 701         arg = get_argument_from_call_expr(expr->args, 0);
 702         name = expr_to_str(arg);
 703
 704         sm = get_sm_state_expr(SMATCH_EXTRA, arg);
 705         if (!sm) {
 706                 sm_msg("no sm state for '%s'", name);
 707                 goto free;
 708         }
 709
 710         sm_prefix();
 711         sm_printf("merge tree: %s -> %s", name, sm->state->name);
 712         print_left_right(sm);
 713         sm_printf("\n");
 714
 715 free:
 716         free_string(name);
 717 }
 718
 719 static void match_print_stree_id(const char *fn, struct expression *expr, void *info)
 720 {
 721         sm_msg("stree_id %d", __stree_id);
 722 }
 723
 724 static void match_bits(const char *fn, struct expression *expr, void *_unused)
 725 {
 726         struct expression *arg;
 727         struct bit_info *info;
 728         char *name;
 729
 730         arg = get_argument_from_call_expr(expr->args, 0);
 731         name = expr_to_str(arg);
 732
 733         info = get_bit_info(arg);
 734
 735         sm_msg("bit info '%s': definitely set 0x%llx.  possibly set 0x%llx.",
 736                name, info->set, info->possible);
 737 }
 738
 739 static void match_mtag(const char *fn, struct expression *expr, void *info)
 740 {
 741         struct expression *arg;
 742         char *name;
 743         mtag_t tag = 0;
 744         int offset = 0;
 745
 746         arg = get_argument_from_call_expr(expr->args, 0);
 747         name = expr_to_str(arg);
 748         expr_to_mtag_offset(arg, &tag, &offset);
 749         sm_msg("mtag: '%s' => tag: %llu %d", name, tag, offset);
 750         free_string(name);
 751 }
 752
 753 static void match_mtag_data_offset(const char *fn, struct expression *expr, void *info)
 754 {
 755         struct expression *arg;
 756         char *name;
 757         mtag_t tag = 0;
 758         int offset = -1;
 759
 760         arg = get_argument_from_call_expr(expr->args, 0);
 761         name = expr_to_str(arg);
 762         expr_to_mtag_offset(arg, &tag, &offset);
 763         sm_msg("mtag: '%s' => tag: %lld, offset: %d", name, tag, offset);
 764         free_string(name);
 765 }
 766
 767 static void match_container(const char *fn, struct expression *expr, void *info)
 768 {
 769         struct expression *container, *x;
 770         char *cont, *name, *str;
 771
 772         container = get_argument_from_call_expr(expr->args, 0);
 773         x = get_argument_from_call_expr(expr->args, 1);
 774
 775         str = get_container_name(container, x);
 776         cont = expr_to_str(container);
 777         name = expr_to_str(x);
 778         sm_msg("container: '%s' vs '%s' --> '%s'", cont, name, str);
 779         free_string(cont);
 780         free_string(name);
 781 }
 782
 783 static struct timeval debug_timer;
 784 static void match_timer_start(const char *fn, struct expression *expr, void *info)
 785 {
 786         gettimeofday(&debug_timer, NULL);
 787 }
 788
 789 static void match_timer_stop(const char *fn, struct expression *expr, void *info)
 790 {
 791         struct timeval stop;
 792         long sec, usec, msec;
 793
 794         gettimeofday(&stop, NULL);
 795
 796         sec = stop.tv_sec - debug_timer.tv_sec;
 797         usec = stop.tv_usec - debug_timer.tv_usec;
 798         msec = sec * 1000 + usec / 1000;
 799
 800         sm_msg("timer: %ld msec", msec);
 801         gettimeofday(&debug_timer, NULL);
 802 }
 803
 804 static void match_expr(const char *fn, struct expression *expr, void *info)
 805 {
 806         struct expression *arg, *str, *new;
 807         char *name, *new_name;
 808
 809         str = get_argument_from_call_expr(expr->args, 0);
 810         arg = get_argument_from_call_expr(expr->args, 1);
 811         if (!arg || !str)
 812                 return;
 813
 814         if (str->type != EXPR_STRING)
 815                 return;
 816
 817         new = gen_expression_from_key(arg, str->string->data);
 818         name = expr_to_str(arg);
 819         new_name = expr_to_str(new);
 820
 821         sm_msg("str = '%s', arg = '%s' expr = '%s'", str->string->data, name, new_name);
 822
 823         free_string(new_name);
 824         free_string(name);
 825 }
 826 static void match_state_count(const char *fn, struct expression *expr, void *info)
 827 {
 828         sm_msg("state_count = %d\n", sm_state_counter);
 829 }
 830
 831 static void match_mem(const char *fn, struct expression *expr, void *info)
 832 {
 833         show_sname_alloc();
 834         show_data_range_alloc();
 835         show_rl_ptrlist_alloc();
 836         show_ptrlist_alloc();
 837         sm_msg("%lu pools", get_pool_count());
 838         sm_msg("%d strees", unfree_stree);
 839         show_smatch_state_alloc();
 840         show_sm_state_alloc();
 841 }
 842
 843 static void match_exit(const char *fn, struct expression *expr, void *info)
 844 {
 845         exit(0);
 846 }
 847
 848 static struct stree *old_stree;
 849 static void trace_var(struct statement *stmt)
 850 {
 851         struct sm_state *sm, *old;
 852         int printed = 0;
 853
 854         if (!trace_variable)
 855                 return;
 856         if (__inline_fn)
 857                 return;
 858
 859         FOR_EACH_SM(__get_cur_stree(), sm) {
 860                 if (strcmp(sm->name, trace_variable) != 0)
 861                         continue;
 862                 old = get_sm_state_stree(old_stree, sm->owner, sm->name, sm->sym);
 863                 if (old && old->state == sm->state)
 864                         continue;
 865                 sm_msg("[%d] %s '%s': '%s' => '%s'", stmt->type,
 866                        check_name(sm->owner),
 867                        sm->name, old ? old->state->name : "<none>", sm->state->name);
 868                 printed = 1;
 869         } END_FOR_EACH_SM(sm);
 870
 871         if (printed) {
 872                 free_stree(&old_stree);
 873                 old_stree = clone_stree(__get_cur_stree());
 874         }
 875 }
 876
 877 static void free_old_stree(struct symbol *sym)
 878 {
 879         free_stree(&old_stree);
 880 }
 881
 882 void check_debug(int id)
 883 {
 884         my_id = id;
 885         add_function_hook("__smatch_about", &match_about, NULL);
 886         add_function_hook("__smatch_all_values", &match_all_values, NULL);
 887         add_function_hook("__smatch_state", &match_state, NULL);
 888         add_function_hook("__smatch_states", &match_states, NULL);
 889         add_function_hook("__smatch_value", &match_print_value, NULL);
 890         add_function_hook("__smatch_known", &match_print_known, NULL);
 891         add_function_hook("__smatch_implied", &match_print_implied, NULL);
 892         add_function_hook("__smatch_implied_min", &match_print_implied_min, NULL);
 893         add_function_hook("__smatch_implied_max", &match_print_implied_max, NULL);
 894         add_function_hook("__smatch_user_rl", &match_user_rl, NULL);
 895         add_function_hook("__smatch_host_rl", &match_host_rl, NULL);
 896         add_function_hook("__smatch_capped", &match_capped, NULL);
 897         add_function_hook("__smatch_hard_max", &match_print_hard_max, NULL);
 898         add_function_hook("__smatch_fuzzy_max", &match_print_fuzzy_max, NULL);
 899         add_function_hook("__smatch_absolute", &match_print_absolute, NULL);
 900         add_function_hook("__smatch_absolute_min", &match_print_absolute_min, NULL);
 901         add_function_hook("__smatch_absolute_max", &match_print_absolute_max, NULL);
 902         add_function_hook("__smatch_real_absolute", &match_real_absolute, NULL);
 903         add_function_hook("__smatch_sval_info", &match_sval_info, NULL);
 904         add_function_hook("__smatch_member_name", &match_member_name, NULL);
 905         add_function_hook("__smatch_possible", &match_possible, NULL);
 906         add_function_hook("__smatch_cur_stree", &match_cur_stree, NULL);
 907         add_function_hook("__smatch_strlen", &match_strlen, NULL);
 908         add_function_hook("__smatch_buf_size", &match_buf_size, NULL);
 909         add_function_hook("__smatch_note", &match_note, NULL);
 910         add_function_hook("__smatch_dump_related", &match_dump_related, NULL);
 911         add_function_hook("__smatch_compare", &match_compare, NULL);
 912         add_function_hook("__smatch_debug_on", &match_debug_on, NULL);
 913         add_function_hook("__smatch_debug_check", &match_debug_check, NULL);
 914         add_function_hook("__smatch_debug_var", &match_debug_var, NULL);
 915         add_function_hook("__smatch_debug_off", &match_debug_off, NULL);
 916         add_function_hook("__smatch_local_debug_on", &match_local_debug_on, NULL);
 917         add_function_hook("__smatch_local_debug_off", &match_local_debug_off, NULL);
 918         add_function_hook("__smatch_debug_db_on", &match_debug_db_on, NULL);
 919         add_function_hook("__smatch_debug_db_off", &match_debug_db_off, NULL);
 920         add_function_hook("__smatch_debug_implied_on", &match_debug_implied_on, NULL);
 921         add_function_hook("__smatch_debug_implied_off", &match_debug_implied_off, NULL);
 922         add_function_hook("__smatch_intersection", &match_intersection, NULL);
 923         add_function_hook("__smatch_type", &match_type, NULL);
 924         add_implied_return_hook("__smatch_type_rl_helper", &match_type_rl_return, NULL);
 925         add_function_hook("__smatch_merge_tree", &match_print_merge_tree, NULL);
 926         add_function_hook("__smatch_stree_id", &match_print_stree_id, NULL);
 927         add_function_hook("__smatch_bits", &match_bits, NULL);
 928         add_function_hook("__smatch_mtag", &match_mtag, NULL);
 929         add_function_hook("__smatch_mtag_data", &match_mtag_data_offset, NULL);
 930         add_function_hook("__smatch_expr", &match_expr, NULL);
 931         add_function_hook("__smatch_state_count", &match_state_count, NULL);
 932         add_function_hook("__smatch_mem", &match_mem, NULL);
 933         add_function_hook("__smatch_exit", &match_exit, NULL);
 934         add_function_hook("__smatch_container", &match_container, NULL);
 935         add_function_hook("__smatch_timer_start", &match_timer_start, NULL);
 936         add_function_hook("__smatch_timer_stop", &match_timer_stop, NULL);
 937
 938         add_hook(free_old_stree, AFTER_FUNC_HOOK);
 939         add_hook(trace_var, STMT_HOOK_AFTER);
 940 }