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11506 smatch resync


  62 static inline int PTR_INT(void *p)
  63 {
  64         return (int)(long)p;
  65 }
  66 
  67 struct tracker {
  68         char *name;
  69         struct symbol *sym;
  70         unsigned short owner;
  71 };
  72 DECLARE_ALLOCATOR(tracker);
  73 DECLARE_PTR_LIST(tracker_list, struct tracker);
  74 DECLARE_PTR_LIST(stree_stack, struct stree);
  75 
  76 /* The first 3 struct members must match struct tracker */
  77 struct sm_state {
  78         const char *name;
  79         struct symbol *sym;
  80         unsigned short owner;
  81         unsigned short merged:1;
  82         unsigned short skip_implications:1;
  83         unsigned int nr_children;
  84         unsigned int line;
  85         struct smatch_state *state;
  86         struct stree *pool;
  87         struct sm_state *left;
  88         struct sm_state *right;
  89         struct state_list *possible;
  90 };
  91 
  92 struct var_sym {
  93         char *var;
  94         struct symbol *sym;
  95 };
  96 DECLARE_ALLOCATOR(var_sym);
  97 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  98 
  99 struct constraint {
 100         int op;
 101         int id;
 102 };
 103 DECLARE_PTR_LIST(constraint_list, struct constraint);
 104 





 105 enum hook_type {
 106         EXPR_HOOK,
 107         STMT_HOOK,
 108         STMT_HOOK_AFTER,
 109         SYM_HOOK,
 110         STRING_HOOK,
 111         DECLARATION_HOOK,
 112         ASSIGNMENT_HOOK,
 113         ASSIGNMENT_HOOK_AFTER,
 114         RAW_ASSIGNMENT_HOOK,
 115         GLOBAL_ASSIGNMENT_HOOK,
 116         LOGIC_HOOK,
 117         CONDITION_HOOK,
 118         PRELOOP_HOOK,
 119         SELECT_HOOK,
 120         WHOLE_CONDITION_HOOK,
 121         FUNCTION_CALL_HOOK_BEFORE,
 122         FUNCTION_CALL_HOOK,
 123         CALL_HOOK_AFTER_INLINE,
 124         FUNCTION_CALL_HOOK_AFTER_DB,


 158 void add_scope_hook(scope_hook *hook, void *data);
 159 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 160 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 161                                 struct expression *assign_expr, void *data);
 162 typedef void (return_implies_hook)(struct expression *call_expr,
 163                                    int param, char *key, char *value);
 164 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 165 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 166 
 167 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 168                               void *info);
 169 void add_implied_return_hook(const char *look_for,
 170                              implied_return_hook *call_back,
 171                              void *info);
 172 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 173                               void *info);
 174 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 175                               void *info);
 176 void return_implies_state(const char *look_for, long long start, long long end,
 177                          implication_hook *call_back, void *info);


 178 void select_return_states_hook(int type, return_implies_hook *callback);
 179 void select_return_states_before(void (*fn)(void));
 180 void select_return_states_after(void (*fn)(void));
 181 int get_implied_return(struct expression *expr, struct range_list **rl);
 182 void allocate_hook_memory(void);
 183 
 184 struct modification_data {
 185         struct smatch_state *prev;
 186         struct expression *cur;
 187 };
 188 
 189 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 190 void add_modification_hook(int owner, modification_hook *call_back);
 191 void add_modification_hook_late(int owner, modification_hook *call_back);
 192 struct smatch_state *get_modification_state(struct expression *expr);
 193 
 194 int outside_of_function(void);
 195 const char *get_filename(void);
 196 const char *get_base_file(void);
 197 char *get_function(void);
 198 int get_lineno(void);
 199 extern int final_pass;
 200 extern struct symbol *cur_func_sym;
 201 extern int option_debug;
 202 extern int local_debug;
 203 extern int option_info;
 204 extern int option_spammy;
 205 extern int option_timeout;
 206 extern char *trace_variable;
 207 extern struct stree *global_states;
 208 int is_skipped_function(void);
 209 int is_silenced_function(void);

 210 
 211 /* smatch_impossible.c */
 212 int is_impossible_path(void);
 213 void set_path_impossible(void);
 214 
 215 extern FILE *sm_outfd;
 216 extern FILE *sql_outfd;
 217 extern FILE *caller_info_fd;
 218 extern int sm_nr_checks;
 219 extern int sm_nr_errors;
 220 extern const char *progname;
 221 
 222 /*
 223  * How to use these routines:
 224  *
 225  * sm_fatal(): an internal error of some kind that should immediately exit
 226  * sm_ierror(): an internal error
 227  * sm_perror(): an internal error from parsing input source
 228  * sm_error(): an error from input source
 229  * sm_warning(): a warning from input source


 349                            struct smatch_state *true_state,
 350                            struct smatch_state *false_state);
 351 void set_true_false_states_expr(int owner, struct expression *expr,
 352                            struct smatch_state *true_state,
 353                            struct smatch_state *false_state);
 354 
 355 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 356 struct stree *get_all_states_stree(int id);
 357 struct stree *__get_cur_stree(void);
 358 int is_reachable(void);
 359 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
 360 
 361 /* smatch_helper.c */
 362 DECLARE_PTR_LIST(int_stack, int);
 363 char *alloc_string(const char *str);
 364 void free_string(char *str);
 365 void append(char *dest, const char *data, int buff_len);
 366 void remove_parens(char *str);
 367 struct smatch_state *alloc_state_num(int num);
 368 struct smatch_state *alloc_state_str(const char *name);

 369 struct smatch_state *alloc_state_expr(struct expression *expr);
 370 struct expression *get_argument_from_call_expr(struct expression_list *args,
 371                                                int num);
 372 
 373 char *expr_to_var(struct expression *expr);
 374 struct symbol *expr_to_sym(struct expression *expr);
 375 char *expr_to_str(struct expression *expr);
 376 char *expr_to_str_sym(struct expression *expr,
 377                                      struct symbol **sym_ptr);
 378 char *expr_to_var_sym(struct expression *expr,
 379                              struct symbol **sym_ptr);
 380 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
 381 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
 382 int get_complication_score(struct expression *expr);
 383 
 384 int sym_name_is(const char *name, struct expression *expr);
 385 int get_const_value(struct expression *expr, sval_t *sval);
 386 int get_value(struct expression *expr, sval_t *val);
 387 int get_implied_value(struct expression *expr, sval_t *val);
 388 int get_implied_min(struct expression *expr, sval_t *sval);
 389 int get_implied_max(struct expression *expr, sval_t *val);
 390 int get_hard_max(struct expression *expr, sval_t *sval);
 391 int get_fuzzy_min(struct expression *expr, sval_t *min);
 392 int get_fuzzy_max(struct expression *expr, sval_t *max);
 393 int get_absolute_min(struct expression *expr, sval_t *sval);
 394 int get_absolute_max(struct expression *expr, sval_t *sval);
 395 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 396 int parse_call_math_rl(struct expression *call, char *math, struct range_list **rl);
 397 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 398 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 399 int is_zero(struct expression *expr);
 400 int known_condition_true(struct expression *expr);
 401 int known_condition_false(struct expression *expr);
 402 int implied_condition_true(struct expression *expr);
 403 int implied_condition_false(struct expression *expr);
 404 int can_integer_overflow(struct symbol *type, struct expression *expr);
 405 void clear_math_cache(void);
 406 
 407 int is_array(struct expression *expr);
 408 struct expression *get_array_base(struct expression *expr);
 409 struct expression *get_array_offset(struct expression *expr);
 410 const char *show_state(struct smatch_state *state);
 411 struct statement *get_expression_statement(struct expression *expr);
 412 struct expression *strip_parens(struct expression *expr);
 413 struct expression *strip_expr(struct expression *expr);
 414 struct expression *strip_expr_set_parent(struct expression *expr);
 415 void scoped_state(int my_id, const char *name, struct symbol *sym);
 416 int is_error_return(struct expression *expr);
 417 int getting_address(void);
 418 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
 419 char *get_member_name(struct expression *expr);
 420 char *get_fnptr_name(struct expression *expr);
 421 int cmp_pos(struct position pos1, struct position pos2);
 422 int positions_eq(struct position pos1, struct position pos2);
 423 struct statement *get_current_statement(void);
 424 struct statement *get_prev_statement(void);
 425 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
 426 int get_param_num_from_sym(struct symbol *sym);
 427 int get_param_num(struct expression *expr);
 428 int ms_since(struct timeval *start);
 429 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 430 int parent_is_gone(struct expression *expr);
 431 int invert_op(int op);

 432 int expr_equiv(struct expression *one, struct expression *two);
 433 void push_int(struct int_stack **stack, int num);
 434 int pop_int(struct int_stack **stack);
 435 
 436 /* smatch_type.c */
 437 struct symbol *get_real_base_type(struct symbol *sym);
 438 int type_bytes(struct symbol *type);
 439 int array_bytes(struct symbol *type);
 440 struct symbol *get_pointer_type(struct expression *expr);
 441 struct symbol *get_type(struct expression *expr);
 442 struct symbol *get_final_type(struct expression *expr);
 443 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
 444 int type_signed(struct symbol *base_type);
 445 int expr_unsigned(struct expression *expr);
 446 int expr_signed(struct expression *expr);
 447 int returns_unsigned(struct symbol *base_type);
 448 int is_pointer(struct expression *expr);
 449 int returns_pointer(struct symbol *base_type);
 450 sval_t sval_type_max(struct symbol *base_type);
 451 sval_t sval_type_min(struct symbol *base_type);


 489 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 490 void add_tracker(struct tracker_list **list, int owner, const char *name,
 491                 struct symbol *sym);
 492 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 493 void del_tracker(struct tracker_list **list, int owner, const char *name,
 494                 struct symbol *sym);
 495 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 496                 struct symbol *sym);
 497 void free_tracker_list(struct tracker_list **list);
 498 void free_trackers_and_list(struct tracker_list **list);
 499 
 500 /* smatch_conditions */
 501 int in_condition(void);
 502 
 503 /* smatch_flow.c */
 504 
 505 extern int __in_fake_assign;
 506 extern int __in_fake_parameter_assign;
 507 extern int __in_fake_struct_assign;
 508 extern int in_fake_env;
 509 void smatch (int argc, char **argv);
 510 int inside_loop(void);
 511 int definitely_inside_loop(void);
 512 struct expression *get_switch_expr(void);
 513 int in_expression_statement(void);
 514 void __process_post_op_stack(void);
 515 void __split_expr(struct expression *expr);
 516 void __split_label_stmt(struct statement *stmt);
 517 void __split_stmt(struct statement *stmt);
 518 extern int __in_function_def;
 519 extern int option_assume_loops;
 520 extern int option_two_passes;
 521 extern int option_no_db;
 522 extern int option_file_output;
 523 extern int option_time;
 524 extern struct expression_list *big_expression_stack;
 525 extern struct expression_list *big_condition_stack;
 526 extern struct statement_list *big_statement_stack;
 527 int is_assigned_call(struct expression *expr);
 528 int inlinable(struct expression *expr);
 529 extern int __inline_call;
 530 extern struct expression *__inline_fn;
 531 extern int __in_pre_condition;
 532 extern int __bail_on_rest_of_function;
 533 extern struct statement *__prev_stmt;
 534 extern struct statement *__cur_stmt;
 535 extern struct statement *__next_stmt;
 536 void init_fake_env(void);
 537 void end_fake_env(void);
 538 int time_parsing_function(void);

 539 
 540 /* smatch_struct_assignment.c */
 541 struct expression *get_faked_expression(void);
 542 void __fake_struct_member_assignments(struct expression *expr);
 543 
 544 /* smatch_project.c */
 545 int is_no_inline_function(const char *function);
 546 
 547 /* smatch_conditions */
 548 void __split_whole_condition(struct expression *expr);
 549 void __handle_logic(struct expression *expr);
 550 int is_condition(struct expression *expr);
 551 int __handle_condition_assigns(struct expression *expr);
 552 int __handle_select_assigns(struct expression *expr);
 553 int __handle_expr_statement_assigns(struct expression *expr);
 554 
 555 /* smatch_implied.c */
 556 extern int option_debug_implied;
 557 extern int option_debug_related;
 558 struct range_list_stack;
 559 void param_limit_implications(struct expression *expr, int param, char *key, char *value);
 560 struct stree *__implied_case_stree(struct expression *switch_expr,
 561                                    struct range_list *case_rl,
 562                                    struct range_list_stack **remaining_cases,
 563                                    struct stree **raw_stree);
 564 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
 565 int assume(struct expression *expr);
 566 void end_assume(void);
 567 int impossible_assumption(struct expression *left, int op, sval_t sval);
 568 




 569 /* smatch_extras.c */

 570 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */
 571 extern int RETURN_ID;
 572 
 573 struct data_range {
 574         sval_t min;
 575         sval_t max;
 576 };
 577 
 578 #define MTAG_ALIAS_BIT (1ULL << 63)
 579 #define MTAG_OFFSET_MASK 0xfffULL

 580 
 581 extern long long valid_ptr_min, valid_ptr_max;
 582 extern sval_t valid_ptr_min_sval, valid_ptr_max_sval;


 583 extern struct range_list *valid_ptr_rl;


 584 static const sval_t array_min_sval = {
 585         .type = &ptr_ctype,
 586         {.value = 100000},
 587 };
 588 static const sval_t array_max_sval = {
 589         .type = &ptr_ctype,
 590         {.value = 199999},
 591 };
 592 static const sval_t text_seg_min = {
 593         .type = &ptr_ctype,
 594         {.value = 100000000},
 595 };
 596 static const sval_t text_seg_max = {
 597         .type = &ptr_ctype,
 598         {.value = 177777777},
 599 };
 600 static const sval_t data_seg_min = {
 601         .type = &ptr_ctype,
 602         {.value = 200000000},
 603 };
 604 static const sval_t data_seg_max = {
 605         .type = &ptr_ctype,
 606         {.value = 277777777},
 607 };
 608 static const sval_t bss_seg_min = {
 609         .type = &ptr_ctype,
 610         {.value = 300000000},
 611 };
 612 static const sval_t bss_seg_max = {
 613         .type = &ptr_ctype,
 614         {.value = 377777777},
 615 };
 616 static const sval_t stack_seg_min = {
 617         .type = &ptr_ctype,
 618         {.value = 400000000},
 619 };
 620 static const sval_t stack_seg_max = {
 621         .type = &ptr_ctype,
 622         {.value = 477777777},
 623 };
 624 static const sval_t kmalloc_seg_min = {
 625         .type = &ptr_ctype,
 626         {.value = 500000000},
 627 };
 628 static const sval_t kmalloc_seg_max = {
 629         .type = &ptr_ctype,
 630         {.value = 577777777},
 631 };
 632 static const sval_t vmalloc_seg_min = {
 633         .type = &ptr_ctype,
 634         {.value = 600000000},
 635 };
 636 static const sval_t vmalloc_seg_max = {
 637         .type = &ptr_ctype,
 638         {.value = 677777777},
 639 };
 640 static const sval_t fn_ptr_min = {
 641         .type = &ptr_ctype,
 642         {.value = 700000000},
 643 };
 644 static const sval_t fn_ptr_max = {
 645         .type = &ptr_ctype,
 646         {.value = 777777777},
 647 };
 648 
 649 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 650 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 651 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 652 char *map_long_to_short_name_sym_nostack(const char *name, struct symbol *sym, struct symbol **new_sym);
 653 
 654 #define STRLEN_MAX_RET 1010101
 655 
 656 /* smatch_absolute.c */
 657 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 658 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 659 
 660 /* smatch_local_values.c */
 661 int get_local_rl(struct expression *expr, struct range_list **rl);
 662 int get_local_max_helper(struct expression *expr, sval_t *sval);
 663 int get_local_min_helper(struct expression *expr, sval_t *sval);
 664 
 665 /* smatch_type_value.c */
 666 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 667 /* smatch_data_val.c */
 668 int get_mtag_rl(struct expression *expr, struct range_list **rl);
 669 /* smatch_array_values.c */
 670 int get_array_rl(struct expression *expr, struct range_list **rl);
 671 
 672 /* smatch_states.c */


 766 
 767 /* smatch_function_hooks.c */
 768 void create_function_hook_hash(void);
 769 void __match_initializer_call(struct symbol *sym);
 770 
 771 /* smatch_db.c */
 772 enum info_type {
 773         INTERNAL        = 0,
 774         /*
 775          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 776          * number it can't be re-used right away so there may be gaps.
 777          * We select these in order by type so if the order matters, then give
 778          * it a number below 100-999,9000-9999 ranges. */
 779 
 780         PARAM_CLEARED   = 101,
 781         PARAM_LIMIT     = 103,
 782         PARAM_FILTER    = 104,
 783 
 784         PARAM_VALUE     = 1001,
 785         BUF_SIZE        = 1002,
 786         USER_DATA       = 1003,
 787         CAPPED_DATA     = 1004,
 788         RETURN_VALUE    = 1005,
 789         DEREFERENCE     = 1006,
 790         RANGE_CAP       = 1007,
 791         LOCK_HELD       = 1008,
 792         LOCK_RELEASED   = 1009,
 793         ABSOLUTE_LIMITS = 1010,
 794         PARAM_ADD       = 1012,
 795         PARAM_FREED     = 1013,
 796         DATA_SOURCE     = 1014,
 797         FUZZY_MAX       = 1015,

 798         STR_LEN         = 1016,
 799         ARRAY_LEN       = 1017,
 800         CAPABLE         = 1018,
 801         NS_CAPABLE      = 1019,
 802         CONTAINER       = 1020,
 803         CASTED_CALL     = 1021,
 804         TYPE_LINK       = 1022,
 805         UNTRACKED_PARAM = 1023,

 806         CULL_PATH       = 1024,
 807         PARAM_SET       = 1025,
 808         PARAM_USED      = 1026,
 809         BYTE_UNITS      = 1027,
 810         COMPARE_LIMIT   = 1028,
 811         PARAM_COMPARE   = 1029,
 812         CONSTRAINT      = 1031,
 813         PASSES_TYPE     = 1032,
 814         CONSTRAINT_REQUIRED = 1033,

 815         NOSPEC          = 1035,
 816         NOSPEC_WB       = 1036,
 817         STMT_CNT        = 1037,
 818         TERMINATED      = 1038,
 819 
 820         /* put random temporary stuff in the 7000-7999 range for testing */
 821         USER_DATA3      = 8017,
 822         USER_DATA3_SET  = 9017,
 823         NO_OVERFLOW     = 8018,
 824         NO_OVERFLOW_SIMPLE = 8019,
 825         LOCKED          = 8020,
 826         UNLOCKED        = 8021,
 827         SET_FS          = 8022,
 828         ATOMIC_INC      = 8023,
 829         ATOMIC_DEC      = 8024,
 830         NO_SIDE_EFFECT  = 8025,
 831         FN_ARG_LINK     = 8028,
 832         DATA_VALUE      = 8029,
 833         ARRAYSIZE_ARG   = 8033,
 834         SIZEOF_ARG      = 8034,
 835         MEMORY_TAG      = 8036,
 836         MTAG_ASSIGN     = 8035,
 837         STRING_VALUE    = 8041,






 838 };
 839 
 840 extern struct sqlite3 *smatch_db;
 841 extern struct sqlite3 *mem_db;
 842 extern struct sqlite3 *cache_db;
 843 
 844 void db_ignore_states(int id);
 845 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 846 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 847 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 848 void add_returned_member_callback(int owner, void (*callback)(int return_id, char *return_ranges, struct expression *expr, char *printed_name, struct smatch_state *state));
 849 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 850 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 851 struct range_list *db_return_vals(struct expression *expr);
 852 struct range_list *db_return_vals_from_str(const char *fn_name);
 853 char *return_state_to_var_sym(struct expression *expr, int param, const char *key, struct symbol **sym);
 854 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
 855 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
 856 const char *state_name_to_param_name(const char *state_name, const char *param_name);
 857 const char *get_param_name_var_sym(const char *name, struct symbol *sym);
 858 const char *get_param_name(struct sm_state *sm);
 859 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
 860 const char *get_mtag_name_expr(struct expression *expr);
 861 char *get_data_info_name(struct expression *expr);

 862 
 863 char *escape_newlines(const char *str);
 864 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 865 
 866 #define sql_helper(db, call_back, data, sql...)                                 \
 867 do {                                                                            \
 868         char sql_txt[1024];                                                     \
 869                                                                                 \
 870         sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql);                        \
 871         sm_debug("debug: %s\n", sql_txt);                                       \
 872         sql_exec(db, call_back, data, sql_txt);                                 \
 873 } while (0)
 874 
 875 
 876 #define run_sql(call_back, data, sql...)                                        \
 877 do {                                                                            \
 878         if (option_no_db)                                                       \
 879                 break;                                                          \
 880         sql_helper(smatch_db, call_back, data, sql);                            \
 881 } while (0)


 935 void sql_insert_caller_info(struct expression *call, int type, int param,
 936                 const char *key, const char *value);
 937 void sql_insert_function_ptr(const char *fn, const char *struct_name);
 938 void sql_insert_return_values(const char *return_values);
 939 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
 940 void sql_insert_function_type_size(const char *member, const char *ranges);
 941 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
 942 void sql_insert_type_info(int type, const char *member, const char *value);
 943 void sql_insert_local_values(const char *name, const char *value);
 944 void sql_insert_function_type_value(const char *type, const char *value);
 945 void sql_insert_function_type(int param, const char *value);
 946 void sql_insert_parameter_name(int param, const char *value);
 947 void sql_insert_data_info(struct expression *data, int type, const char *value);
 948 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
 949 void sql_save_constraint(const char *con);
 950 void sql_save_constraint_required(const char *data, int op, const char *limit);
 951 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
 952 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
 953 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
 954 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);
 955 void insert_mtag_data(sval_t sval, struct range_list *rl);
 956 void sql_insert_mtag_map(mtag_t tag, int offset, mtag_t container);
 957 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
 958 int mtag_map_select_container(mtag_t tag, int offset, mtag_t *container);
 959 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);


 960 
 961 void sql_select_return_states(const char *cols, struct expression *call,
 962         int (*callback)(void*, int, char**, char**), void *info);
 963 void sql_select_call_implies(const char *cols, struct expression *call,
 964         int (*callback)(void*, int, char**, char**));
 965 
 966 void open_smatch_db(char *db_file);
 967 
 968 /* smatch_files.c */
 969 int open_data_file(const char *filename);
 970 int open_schema_file(const char *schema);
 971 struct token *get_tokens_file(const char *filename);
 972 
 973 /* smatch.c */
 974 extern char *option_debug_check;
 975 extern char *option_project_str;
 976 extern char *bin_dir;
 977 extern char *data_dir;
 978 extern int option_no_data;
 979 extern int option_full_path;


 995 
 996 
 997 /* smatch_buf_size.c */
 998 int get_array_size(struct expression *expr);
 999 int get_array_size_bytes(struct expression *expr);
1000 int get_array_size_bytes_min(struct expression *expr);
1001 int get_array_size_bytes_max(struct expression *expr);
1002 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1003 int get_real_array_size(struct expression *expr);
1004 int last_member_is_resizable(struct symbol *type);
1005 /* smatch_strlen.c */
1006 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1007 int get_size_from_strlen(struct expression *expr);
1008 
1009 /* smatch_capped.c */
1010 int is_capped(struct expression *expr);
1011 int is_capped_var_sym(const char *name, struct symbol *sym);
1012 
1013 /* check_user_data.c */
1014 int is_user_macro(struct expression *expr);
1015 int is_user_data(struct expression *expr);
1016 int is_capped_user_data(struct expression *expr);
1017 int implied_user_data(struct expression *expr, struct range_list **rl);
1018 struct stree *get_user_stree(void);
1019 int get_user_rl(struct expression *expr, struct range_list **rl);
1020 int get_user_rl_spammy(struct expression *expr, struct range_list **rl);
1021 int is_user_rl(struct expression *expr);
1022 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);


1023 
1024 /* check_locking.c */
1025 void print_held_locks();
1026 
1027 /* check_assigned_expr.c */
1028 struct expression *get_assigned_expr(struct expression *expr);
1029 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1030 /* smatch_return_to_param.c */
1031 void __add_return_to_param_mapping(struct expression *assign, const char *return_string);
1032 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1033 
1034 /* smatch_comparison.c */
1035 struct compare_data {
1036         /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1037         struct expression *left;
1038         const char *left_var;
1039         struct var_sym_list *left_vsl;
1040         int comparison;
1041         struct expression *right;
1042         const char *right_var;
1043         struct var_sym_list *right_vsl;
1044 };
1045 DECLARE_ALLOCATOR(compare_data);
1046 struct smatch_state *alloc_compare_state(
1047                 struct expression *left,
1048                 const char *left_var, struct var_sym_list *left_vsl,
1049                 int comparison,
1050                 struct expression *right,
1051                 const char *right_var, struct var_sym_list *right_vsl);
1052 int filter_comparison(int orig, int op);
1053 int merge_comparisons(int one, int two);
1054 int combine_comparisons(int left_compare, int right_compare);
1055 int state_to_comparison(struct smatch_state *state);
1056 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1057 int get_comparison(struct expression *left, struct expression *right);

1058 int get_comparison_strings(const char *one, const char *two);
1059 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1060 struct state_list *get_all_comparisons(struct expression *expr);
1061 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1062 void __add_return_comparison(struct expression *call, const char *range);
1063 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1064 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1065 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1066 char *expr_equal_to_param(struct expression *expr, int ignore);
1067 char *expr_lte_to_param(struct expression *expr, int ignore);
1068 char *expr_param_comparison(struct expression *expr, int ignore);
1069 int flip_comparison(int op);
1070 int negate_comparison(int op);
1071 int remove_unsigned_from_comparison(int op);
1072 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1073 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1074 struct sm_state *comparison_implication_hook(struct expression *expr,
1075                         struct state_list **true_stack,
1076                         struct state_list **false_stack);
1077 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,


1092 int sval_bits_used(sval_t sval);
1093 int sval_is_negative(sval_t sval);
1094 int sval_is_positive(sval_t sval);
1095 int sval_is_min(sval_t sval);
1096 int sval_is_max(sval_t sval);
1097 int sval_is_a_min(sval_t sval);
1098 int sval_is_a_max(sval_t sval);
1099 int sval_is_negative_min(sval_t sval);
1100 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1101 int sval_cmp_val(sval_t one, long long val);
1102 sval_t sval_min(sval_t one, sval_t two);
1103 sval_t sval_max(sval_t one, sval_t two);
1104 int sval_too_low(struct symbol *type, sval_t sval);
1105 int sval_too_high(struct symbol *type, sval_t sval);
1106 int sval_fits(struct symbol *type, sval_t sval);
1107 sval_t sval_cast(struct symbol *type, sval_t sval);
1108 sval_t sval_preop(sval_t sval, int op);
1109 sval_t sval_binop(sval_t left, int op, sval_t right);
1110 int sval_binop_overflows(sval_t left, int op, sval_t right);
1111 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);


1112 unsigned long long fls_mask(unsigned long long uvalue);
1113 unsigned long long sval_fls_mask(sval_t sval);
1114 const char *sval_to_str(sval_t sval);

1115 const char *sval_to_numstr(sval_t sval);
1116 sval_t ll_to_sval(long long val);
1117 
1118 /* smatch_string_list.c */
1119 int list_has_string(struct string_list *str_list, const char *str);
1120 void insert_string(struct string_list **str_list, const char *str);
1121 struct string_list *clone_str_list(struct string_list *orig);
1122 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1123 
1124 /* smatch_start_states.c */
1125 struct stree *get_start_states(void);
1126 
1127 /* smatch_recurse.c */
1128 int has_symbol(struct expression *expr, struct symbol *sym);
1129 int has_variable(struct expression *expr, struct expression *var);
1130 int has_inc_dec(struct expression *expr);
1131 
1132 /* smatch_stored_conditions.c */
1133 struct smatch_state *get_stored_condition(struct expression *expr);
1134 struct expression_list *get_conditions(struct expression *expr);
1135 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1136                         struct state_list **true_stack,
1137                         struct state_list **false_stack);
1138 
1139 /* check_string_len.c */
1140 int get_formatted_string_size(struct expression *call, int arg);

1141 
1142 /* smatch_param_set.c */
1143 int param_was_set(struct expression *expr);
1144 int param_was_set_var_sym(const char *name, struct symbol *sym);
1145 /* smatch_param_filter.c */
1146 int param_has_filter_data(struct sm_state *sm);
1147 
1148 /* smatch_links.c */
1149 void set_up_link_functions(int id, int linkid);
1150 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1151 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1152 
1153 /* smatch_auto_copy.c */
1154 void set_auto_copy(int owner);
1155 
1156 /* check_buf_comparison */
1157 struct expression *get_size_variable(struct expression *buf);

1158 struct expression *get_array_variable(struct expression *size);

1159 
1160 /* smatch_untracked_param.c */
1161 void mark_untracked(struct expression *expr, int param, const char *key, const char *value);
1162 void add_untracked_param_hook(void (func)(struct expression *call, int param));

1163 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1164 
1165 /* smatch_strings.c */
1166 struct state_list *get_strings(struct expression *expr);
1167 struct expression *fake_string_from_mtag(mtag_t tag);
1168 
1169 /* smatch_estate.c */
1170 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1171 
1172 /* smatch_address.c */
1173 int get_address_rl(struct expression *expr, struct range_list **rl);
1174 int get_member_offset(struct symbol *type, const char *member_name);
1175 int get_member_offset_from_deref(struct expression *expr);
1176 
1177 /* for now this is in smatch_used_parameter.c */
1178 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1179 
1180 /* smatch_buf_comparison.c */
1181 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1182 
1183 struct stree *get_all_return_states(void);
1184 struct stree_stack *get_all_return_strees(void);
1185 int on_atomic_dec_path(void);
1186 int was_inced(const char *name, struct symbol *sym);
1187 
1188 /* smatch_constraints.c */
1189 char *get_constraint_str(struct expression *expr);
1190 struct constraint_list *get_constraints(struct expression *expr);
1191 char *unmet_constraint(struct expression *data, struct expression *offset);
1192 char *get_required_constraint(const char *data_str);
1193 
1194 /* smatch_container_of.c */
1195 int get_param_from_container_of(struct expression *expr);
1196 int get_offset_from_container_of(struct expression *expr);

1197 
1198 /* smatch_mtag.c */
1199 int get_string_mtag(struct expression *expr, mtag_t *tag);
1200 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);
1201 int get_mtag(struct expression *expr, mtag_t *tag);
1202 int get_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1203 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1204 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1205 void update_mtag_data(struct expression *expr);
1206 int get_mtag_sval(struct expression *expr, sval_t *sval);
1207 int get_mtag_addr_sval(struct expression *expr, sval_t *sval);
1208 
1209 /* Trinity fuzzer stuff */
1210 const char *get_syscall_arg_type(struct symbol *sym);
1211 



1212 /* smatch_mem_tracker.c */
1213 extern int option_mem;

1214 unsigned long get_max_memory(void);
1215 
1216 /* check_is_nospec.c */
1217 bool is_nospec(struct expression *expr);

1218 
1219 /* smatch_nul_terminator.c */
1220 bool is_nul_terminated(struct expression *expr);


1221 








1222 static inline int type_bits(struct symbol *type)
1223 {
1224         if (!type)
1225                 return 0;
1226         if (type->type == SYM_PTR)  /* Sparse doesn't set this for &pointers */
1227                 return bits_in_pointer;
1228         if (type->type == SYM_ARRAY)
1229                 return bits_in_pointer;
1230         if (!type->examined)
1231                 examine_symbol_type(type);
1232         return type->bit_size;
1233 }
1234 
1235 static inline bool type_is_ptr(struct symbol *type)
1236 {
1237         return type && (type->type == SYM_PTR || type->type == SYM_ARRAY);
1238 }
1239 
1240 static inline int type_unsigned(struct symbol *base_type)
1241 {
1242         if (!base_type)
1243                 return 0;


1244         if (base_type->ctype.modifiers & MOD_UNSIGNED)
1245                 return 1;
1246         return 0;
1247 }
1248 
1249 static inline int type_positive_bits(struct symbol *type)
1250 {
1251         if (!type)
1252                 return 0;
1253         if (type->type == SYM_ARRAY)
1254                 return bits_in_pointer - 1;
1255         if (type_unsigned(type))
1256                 return type_bits(type);
1257         return type_bits(type) - 1;
1258 }
1259 
1260 static inline int sval_positive_bits(sval_t sval)
1261 {
1262         return type_positive_bits(sval.type);
1263 }
1264 
1265 /*
1266  * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1267  */
1268 static inline int sval_cmp(sval_t one, sval_t two)
1269 {
1270         struct symbol *type;
1271 
1272         type = one.type;
1273         if (sval_positive_bits(two) > sval_positive_bits(one))
1274                 type = two.type;




  62 static inline int PTR_INT(void *p)
  63 {
  64         return (int)(long)p;
  65 }
  66 
  67 struct tracker {
  68         char *name;
  69         struct symbol *sym;
  70         unsigned short owner;
  71 };
  72 DECLARE_ALLOCATOR(tracker);
  73 DECLARE_PTR_LIST(tracker_list, struct tracker);
  74 DECLARE_PTR_LIST(stree_stack, struct stree);
  75 
  76 /* The first 3 struct members must match struct tracker */
  77 struct sm_state {
  78         const char *name;
  79         struct symbol *sym;
  80         unsigned short owner;
  81         unsigned short merged:1;


  82         unsigned int line;
  83         struct smatch_state *state;
  84         struct stree *pool;
  85         struct sm_state *left;
  86         struct sm_state *right;
  87         struct state_list *possible;
  88 };
  89 
  90 struct var_sym {
  91         char *var;
  92         struct symbol *sym;
  93 };
  94 DECLARE_ALLOCATOR(var_sym);
  95 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  96 
  97 struct constraint {
  98         int op;
  99         int id;
 100 };
 101 DECLARE_PTR_LIST(constraint_list, struct constraint);
 102 
 103 struct bit_info {
 104         unsigned long long set;
 105         unsigned long long possible;
 106 };
 107 
 108 enum hook_type {
 109         EXPR_HOOK,
 110         STMT_HOOK,
 111         STMT_HOOK_AFTER,
 112         SYM_HOOK,
 113         STRING_HOOK,
 114         DECLARATION_HOOK,
 115         ASSIGNMENT_HOOK,
 116         ASSIGNMENT_HOOK_AFTER,
 117         RAW_ASSIGNMENT_HOOK,
 118         GLOBAL_ASSIGNMENT_HOOK,
 119         LOGIC_HOOK,
 120         CONDITION_HOOK,
 121         PRELOOP_HOOK,
 122         SELECT_HOOK,
 123         WHOLE_CONDITION_HOOK,
 124         FUNCTION_CALL_HOOK_BEFORE,
 125         FUNCTION_CALL_HOOK,
 126         CALL_HOOK_AFTER_INLINE,
 127         FUNCTION_CALL_HOOK_AFTER_DB,


 161 void add_scope_hook(scope_hook *hook, void *data);
 162 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 163 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 164                                 struct expression *assign_expr, void *data);
 165 typedef void (return_implies_hook)(struct expression *call_expr,
 166                                    int param, char *key, char *value);
 167 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 168 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 169 
 170 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 171                               void *info);
 172 void add_implied_return_hook(const char *look_for,
 173                              implied_return_hook *call_back,
 174                              void *info);
 175 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 176                               void *info);
 177 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 178                               void *info);
 179 void return_implies_state(const char *look_for, long long start, long long end,
 180                          implication_hook *call_back, void *info);
 181 void return_implies_state_sval(const char *look_for, sval_t start, sval_t end,
 182                          implication_hook *call_back, void *info);
 183 void select_return_states_hook(int type, return_implies_hook *callback);
 184 void select_return_states_before(void (*fn)(void));
 185 void select_return_states_after(void (*fn)(void));
 186 int get_implied_return(struct expression *expr, struct range_list **rl);
 187 void allocate_hook_memory(void);
 188 
 189 struct modification_data {
 190         struct smatch_state *prev;
 191         struct expression *cur;
 192 };
 193 
 194 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 195 void add_modification_hook(int owner, modification_hook *call_back);
 196 void add_modification_hook_late(int owner, modification_hook *call_back);
 197 struct smatch_state *get_modification_state(struct expression *expr);
 198 
 199 int outside_of_function(void);
 200 const char *get_filename(void);
 201 const char *get_base_file(void);
 202 char *get_function(void);
 203 int get_lineno(void);
 204 extern int final_pass;
 205 extern struct symbol *cur_func_sym;
 206 extern int option_debug;
 207 extern int local_debug;
 208 extern int option_info;
 209 extern int option_spammy;
 210 extern int option_timeout;
 211 extern char *trace_variable;
 212 extern struct stree *global_states;
 213 int is_skipped_function(void);
 214 int is_silenced_function(void);
 215 extern bool implications_off;
 216 
 217 /* smatch_impossible.c */
 218 int is_impossible_path(void);
 219 void set_path_impossible(void);
 220 
 221 extern FILE *sm_outfd;
 222 extern FILE *sql_outfd;
 223 extern FILE *caller_info_fd;
 224 extern int sm_nr_checks;
 225 extern int sm_nr_errors;
 226 extern const char *progname;
 227 
 228 /*
 229  * How to use these routines:
 230  *
 231  * sm_fatal(): an internal error of some kind that should immediately exit
 232  * sm_ierror(): an internal error
 233  * sm_perror(): an internal error from parsing input source
 234  * sm_error(): an error from input source
 235  * sm_warning(): a warning from input source


 355                            struct smatch_state *true_state,
 356                            struct smatch_state *false_state);
 357 void set_true_false_states_expr(int owner, struct expression *expr,
 358                            struct smatch_state *true_state,
 359                            struct smatch_state *false_state);
 360 
 361 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 362 struct stree *get_all_states_stree(int id);
 363 struct stree *__get_cur_stree(void);
 364 int is_reachable(void);
 365 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
 366 
 367 /* smatch_helper.c */
 368 DECLARE_PTR_LIST(int_stack, int);
 369 char *alloc_string(const char *str);
 370 void free_string(char *str);
 371 void append(char *dest, const char *data, int buff_len);
 372 void remove_parens(char *str);
 373 struct smatch_state *alloc_state_num(int num);
 374 struct smatch_state *alloc_state_str(const char *name);
 375 struct smatch_state *merge_str_state(struct smatch_state *s1, struct smatch_state *s2);
 376 struct smatch_state *alloc_state_expr(struct expression *expr);
 377 struct expression *get_argument_from_call_expr(struct expression_list *args,
 378                                                int num);
 379 
 380 char *expr_to_var(struct expression *expr);
 381 struct symbol *expr_to_sym(struct expression *expr);
 382 char *expr_to_str(struct expression *expr);
 383 char *expr_to_str_sym(struct expression *expr,
 384                                      struct symbol **sym_ptr);
 385 char *expr_to_var_sym(struct expression *expr,
 386                              struct symbol **sym_ptr);
 387 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
 388 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
 389 int get_complication_score(struct expression *expr);
 390 
 391 int sym_name_is(const char *name, struct expression *expr);
 392 int get_const_value(struct expression *expr, sval_t *sval);
 393 int get_value(struct expression *expr, sval_t *val);
 394 int get_implied_value(struct expression *expr, sval_t *val);
 395 int get_implied_min(struct expression *expr, sval_t *sval);
 396 int get_implied_max(struct expression *expr, sval_t *val);
 397 int get_hard_max(struct expression *expr, sval_t *sval);
 398 int get_fuzzy_min(struct expression *expr, sval_t *min);
 399 int get_fuzzy_max(struct expression *expr, sval_t *max);
 400 int get_absolute_min(struct expression *expr, sval_t *sval);
 401 int get_absolute_max(struct expression *expr, sval_t *sval);
 402 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 403 int parse_call_math_rl(struct expression *call, const char *math, struct range_list **rl);
 404 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 405 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 406 int is_zero(struct expression *expr);
 407 int known_condition_true(struct expression *expr);
 408 int known_condition_false(struct expression *expr);
 409 int implied_condition_true(struct expression *expr);
 410 int implied_condition_false(struct expression *expr);
 411 int can_integer_overflow(struct symbol *type, struct expression *expr);
 412 void clear_math_cache(void);
 413 
 414 int is_array(struct expression *expr);
 415 struct expression *get_array_base(struct expression *expr);
 416 struct expression *get_array_offset(struct expression *expr);
 417 const char *show_state(struct smatch_state *state);
 418 struct statement *get_expression_statement(struct expression *expr);
 419 struct expression *strip_parens(struct expression *expr);
 420 struct expression *strip_expr(struct expression *expr);
 421 struct expression *strip_expr_set_parent(struct expression *expr);
 422 void scoped_state(int my_id, const char *name, struct symbol *sym);
 423 int is_error_return(struct expression *expr);
 424 int getting_address(void);
 425 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
 426 char *get_member_name(struct expression *expr);
 427 char *get_fnptr_name(struct expression *expr);
 428 int cmp_pos(struct position pos1, struct position pos2);
 429 int positions_eq(struct position pos1, struct position pos2);
 430 struct statement *get_current_statement(void);
 431 struct statement *get_prev_statement(void);
 432 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
 433 int get_param_num_from_sym(struct symbol *sym);
 434 int get_param_num(struct expression *expr);
 435 int ms_since(struct timeval *start);
 436 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 437 int parent_is_gone(struct expression *expr);
 438 int invert_op(int op);
 439 int op_remove_assign(int op);
 440 int expr_equiv(struct expression *one, struct expression *two);
 441 void push_int(struct int_stack **stack, int num);
 442 int pop_int(struct int_stack **stack);
 443 
 444 /* smatch_type.c */
 445 struct symbol *get_real_base_type(struct symbol *sym);
 446 int type_bytes(struct symbol *type);
 447 int array_bytes(struct symbol *type);
 448 struct symbol *get_pointer_type(struct expression *expr);
 449 struct symbol *get_type(struct expression *expr);
 450 struct symbol *get_final_type(struct expression *expr);
 451 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
 452 int type_signed(struct symbol *base_type);
 453 int expr_unsigned(struct expression *expr);
 454 int expr_signed(struct expression *expr);
 455 int returns_unsigned(struct symbol *base_type);
 456 int is_pointer(struct expression *expr);
 457 int returns_pointer(struct symbol *base_type);
 458 sval_t sval_type_max(struct symbol *base_type);
 459 sval_t sval_type_min(struct symbol *base_type);


 497 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 498 void add_tracker(struct tracker_list **list, int owner, const char *name,
 499                 struct symbol *sym);
 500 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 501 void del_tracker(struct tracker_list **list, int owner, const char *name,
 502                 struct symbol *sym);
 503 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 504                 struct symbol *sym);
 505 void free_tracker_list(struct tracker_list **list);
 506 void free_trackers_and_list(struct tracker_list **list);
 507 
 508 /* smatch_conditions */
 509 int in_condition(void);
 510 
 511 /* smatch_flow.c */
 512 
 513 extern int __in_fake_assign;
 514 extern int __in_fake_parameter_assign;
 515 extern int __in_fake_struct_assign;
 516 extern int in_fake_env;
 517 void smatch (struct string_list *filelist);
 518 int inside_loop(void);
 519 int definitely_inside_loop(void);
 520 struct expression *get_switch_expr(void);
 521 int in_expression_statement(void);
 522 void __process_post_op_stack(void);
 523 void __split_expr(struct expression *expr);
 524 void __split_label_stmt(struct statement *stmt);
 525 void __split_stmt(struct statement *stmt);
 526 extern int __in_function_def;
 527 extern int option_assume_loops;
 528 extern int option_two_passes;
 529 extern int option_no_db;
 530 extern int option_file_output;
 531 extern int option_time;
 532 extern struct expression_list *big_expression_stack;
 533 extern struct expression_list *big_condition_stack;
 534 extern struct statement_list *big_statement_stack;
 535 int is_assigned_call(struct expression *expr);
 536 int inlinable(struct expression *expr);
 537 extern int __inline_call;
 538 extern struct expression *__inline_fn;
 539 extern int __in_pre_condition;
 540 extern int __bail_on_rest_of_function;
 541 extern struct statement *__prev_stmt;
 542 extern struct statement *__cur_stmt;
 543 extern struct statement *__next_stmt;
 544 void init_fake_env(void);
 545 void end_fake_env(void);
 546 int time_parsing_function(void);
 547 bool taking_too_long(void);
 548 
 549 /* smatch_struct_assignment.c */
 550 struct expression *get_faked_expression(void);
 551 void __fake_struct_member_assignments(struct expression *expr);
 552 
 553 /* smatch_project.c */
 554 int is_no_inline_function(const char *function);
 555 
 556 /* smatch_conditions */
 557 void __split_whole_condition(struct expression *expr);
 558 void __handle_logic(struct expression *expr);
 559 int is_condition(struct expression *expr);
 560 int __handle_condition_assigns(struct expression *expr);
 561 int __handle_select_assigns(struct expression *expr);
 562 int __handle_expr_statement_assigns(struct expression *expr);
 563 
 564 /* smatch_implied.c */


 565 struct range_list_stack;
 566 void param_limit_implications(struct expression *expr, int param, char *key, char *value);
 567 struct stree *__implied_case_stree(struct expression *switch_expr,
 568                                    struct range_list *case_rl,
 569                                    struct range_list_stack **remaining_cases,
 570                                    struct stree **raw_stree);
 571 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
 572 int assume(struct expression *expr);
 573 void end_assume(void);
 574 int impossible_assumption(struct expression *left, int op, sval_t sval);
 575 
 576 /* smatch_slist.h */
 577 bool has_dynamic_states(unsigned short owner);
 578 void set_dynamic_states(unsigned short owner);
 579 
 580 /* smatch_extras.c */
 581 int in_warn_on_macro(void);
 582 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */
 583 extern int RETURN_ID;
 584 
 585 struct data_range {
 586         sval_t min;
 587         sval_t max;
 588 };
 589 
 590 #define MTAG_ALIAS_BIT (1ULL << 63)
 591 #define MTAG_OFFSET_MASK 0xfffULL
 592 #define MTAG_SEED 0xdead << 12
 593 
 594 const extern unsigned long valid_ptr_min;
 595 extern unsigned long valid_ptr_max;
 596 extern const sval_t valid_ptr_min_sval;
 597 extern sval_t valid_ptr_max_sval;
 598 extern struct range_list *valid_ptr_rl;
 599 void alloc_valid_ptr_rl(void);
 600 
 601 static const sval_t array_min_sval = {
 602         .type = &ptr_ctype,
 603         {.value = 100000},
 604 };
 605 static const sval_t array_max_sval = {
 606         .type = &ptr_ctype,
 607         {.value = ULONG_MAX - 4095},
 608 };
 609 static const sval_t text_seg_min = {
 610         .type = &ptr_ctype,
 611         {.value = 4096},
 612 };
 613 static const sval_t text_seg_max = {
 614         .type = &ptr_ctype,
 615         {.value = ULONG_MAX - 4095},
 616 };
 617 static const sval_t data_seg_min = {
 618         .type = &ptr_ctype,
 619         {.value = 4096},
 620 };
 621 static const sval_t data_seg_max = {
 622         .type = &ptr_ctype,
 623         {.value = ULONG_MAX - 4095},
 624 };
 625 static const sval_t bss_seg_min = {
 626         .type = &ptr_ctype,
 627         {.value = 4096},
 628 };
 629 static const sval_t bss_seg_max = {
 630         .type = &ptr_ctype,
 631         {.value = ULONG_MAX - 4095},
 632 };
 633 static const sval_t stack_seg_min = {
 634         .type = &ptr_ctype,
 635         {.value = 4096},
 636 };
 637 static const sval_t stack_seg_max = {
 638         .type = &ptr_ctype,
 639         {.value = ULONG_MAX - 4095},
 640 };
 641 static const sval_t kmalloc_seg_min = {
 642         .type = &ptr_ctype,
 643         {.value = 4096},
 644 };
 645 static const sval_t kmalloc_seg_max = {
 646         .type = &ptr_ctype,
 647         {.value = ULONG_MAX - 4095},
 648 };
 649 static const sval_t vmalloc_seg_min = {
 650         .type = &ptr_ctype,
 651         {.value = 4096},
 652 };
 653 static const sval_t vmalloc_seg_max = {
 654         .type = &ptr_ctype,
 655         {.value = ULONG_MAX - 4095},
 656 };
 657 static const sval_t fn_ptr_min = {
 658         .type = &ptr_ctype,
 659         {.value = 4096},
 660 };
 661 static const sval_t fn_ptr_max = {
 662         .type = &ptr_ctype,
 663         {.value = ULONG_MAX - 4095},
 664 };
 665 
 666 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 667 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 668 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym, bool use_stack);

 669 
 670 #define STRLEN_MAX_RET 1010101
 671 
 672 /* smatch_absolute.c */
 673 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 674 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 675 
 676 /* smatch_local_values.c */
 677 int get_local_rl(struct expression *expr, struct range_list **rl);
 678 int get_local_max_helper(struct expression *expr, sval_t *sval);
 679 int get_local_min_helper(struct expression *expr, sval_t *sval);
 680 
 681 /* smatch_type_value.c */
 682 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 683 /* smatch_data_val.c */
 684 int get_mtag_rl(struct expression *expr, struct range_list **rl);
 685 /* smatch_array_values.c */
 686 int get_array_rl(struct expression *expr, struct range_list **rl);
 687 
 688 /* smatch_states.c */


 782 
 783 /* smatch_function_hooks.c */
 784 void create_function_hook_hash(void);
 785 void __match_initializer_call(struct symbol *sym);
 786 
 787 /* smatch_db.c */
 788 enum info_type {
 789         INTERNAL        = 0,
 790         /*
 791          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 792          * number it can't be re-used right away so there may be gaps.
 793          * We select these in order by type so if the order matters, then give
 794          * it a number below 100-999,9000-9999 ranges. */
 795 
 796         PARAM_CLEARED   = 101,
 797         PARAM_LIMIT     = 103,
 798         PARAM_FILTER    = 104,
 799 
 800         PARAM_VALUE     = 1001,
 801         BUF_SIZE        = 1002,

 802         CAPPED_DATA     = 1004,
 803         RETURN_VALUE    = 1005,
 804         DEREFERENCE     = 1006,
 805         RANGE_CAP       = 1007,
 806         LOCK_HELD       = 1008,
 807         LOCK_RELEASED   = 1009,
 808         ABSOLUTE_LIMITS = 1010,
 809         PARAM_ADD       = 1012,
 810         PARAM_FREED     = 1013,
 811         DATA_SOURCE     = 1014,
 812         FUZZY_MAX       = 1015,
 813         HARD_MAX        = 2015,
 814         STR_LEN         = 1016,
 815         ARRAY_LEN       = 1017,
 816         CAPABLE         = 1018,
 817         NS_CAPABLE      = 1019,
 818         CONTAINER       = 1020,
 819         CASTED_CALL     = 1021,
 820         TYPE_LINK       = 1022,
 821         UNTRACKED_PARAM = 1023,
 822         LOST_PARAM      = 2023,
 823         CULL_PATH       = 1024,
 824         PARAM_SET       = 1025,
 825         PARAM_USED      = 1026,
 826         BYTE_UNITS      = 1027,
 827         COMPARE_LIMIT   = 1028,
 828         PARAM_COMPARE   = 1029,
 829         CONSTRAINT      = 1031,
 830         PASSES_TYPE     = 1032,
 831         CONSTRAINT_REQUIRED = 1033,
 832         BIT_INFO        = 1034,
 833         NOSPEC          = 1035,
 834         NOSPEC_WB       = 1036,
 835         STMT_CNT        = 1037,
 836         TERMINATED      = 1038,
 837 
 838         /* put random temporary stuff in the 7000-7999 range for testing */
 839         USER_DATA       = 8017,
 840         USER_DATA_SET   = 9017,
 841         NO_OVERFLOW     = 8018,
 842         NO_OVERFLOW_SIMPLE = 8019,
 843         LOCKED          = 8020,
 844         UNLOCKED        = 8021,
 845         SET_FS          = 8022,
 846         ATOMIC_INC      = 8023,
 847         ATOMIC_DEC      = 8024,
 848         NO_SIDE_EFFECT  = 8025,
 849         FN_ARG_LINK     = 8028,
 850         DATA_VALUE      = 8029,
 851         ARRAYSIZE_ARG   = 8033,
 852         SIZEOF_ARG      = 8034,
 853         MEMORY_TAG      = 8036,
 854         MTAG_ASSIGN     = 8035,
 855         STRING_VALUE    = 8041,
 856 
 857         BYTE_COUNT      = 8050,
 858         ELEM_COUNT      = 8051,
 859         ELEM_LAST       = 8052,
 860         USED_LAST       = 8053,
 861         USED_COUNT      = 8054,
 862 };
 863 
 864 extern struct sqlite3 *smatch_db;
 865 extern struct sqlite3 *mem_db;
 866 extern struct sqlite3 *cache_db;
 867 
 868 void db_ignore_states(int id);
 869 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 870 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 871 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 872 void add_returned_member_callback(int owner, void (*callback)(int return_id, char *return_ranges, struct expression *expr, char *printed_name, struct smatch_state *state));
 873 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 874 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 875 struct range_list *db_return_vals(struct expression *expr);
 876 struct range_list *db_return_vals_from_str(const char *fn_name);
 877 char *return_state_to_var_sym(struct expression *expr, int param, const char *key, struct symbol **sym);
 878 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
 879 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
 880 const char *state_name_to_param_name(const char *state_name, const char *param_name);
 881 const char *get_param_name_var_sym(const char *name, struct symbol *sym);
 882 const char *get_param_name(struct sm_state *sm);
 883 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
 884 const char *get_mtag_name_expr(struct expression *expr);
 885 char *get_data_info_name(struct expression *expr);
 886 int is_recursive_member(const char *param_name);
 887 
 888 char *escape_newlines(const char *str);
 889 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 890 
 891 #define sql_helper(db, call_back, data, sql...)                                 \
 892 do {                                                                            \
 893         char sql_txt[1024];                                                     \
 894                                                                                 \
 895         sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql);                        \
 896         sm_debug("debug: %s\n", sql_txt);                                       \
 897         sql_exec(db, call_back, data, sql_txt);                                 \
 898 } while (0)
 899 
 900 
 901 #define run_sql(call_back, data, sql...)                                        \
 902 do {                                                                            \
 903         if (option_no_db)                                                       \
 904                 break;                                                          \
 905         sql_helper(smatch_db, call_back, data, sql);                            \
 906 } while (0)


 960 void sql_insert_caller_info(struct expression *call, int type, int param,
 961                 const char *key, const char *value);
 962 void sql_insert_function_ptr(const char *fn, const char *struct_name);
 963 void sql_insert_return_values(const char *return_values);
 964 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
 965 void sql_insert_function_type_size(const char *member, const char *ranges);
 966 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
 967 void sql_insert_type_info(int type, const char *member, const char *value);
 968 void sql_insert_local_values(const char *name, const char *value);
 969 void sql_insert_function_type_value(const char *type, const char *value);
 970 void sql_insert_function_type(int param, const char *value);
 971 void sql_insert_parameter_name(int param, const char *value);
 972 void sql_insert_data_info(struct expression *data, int type, const char *value);
 973 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
 974 void sql_save_constraint(const char *con);
 975 void sql_save_constraint_required(const char *data, int op, const char *limit);
 976 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
 977 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
 978 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
 979 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);

 980 void sql_insert_mtag_map(mtag_t tag, int offset, mtag_t container);
 981 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
 982 int mtag_map_select_container(mtag_t tag, int offset, mtag_t *container);
 983 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);
 984 struct smatch_state *swap_mtag_return(struct expression *expr, struct smatch_state *state);
 985 struct range_list *swap_mtag_seed(struct expression *expr, struct range_list *rl);
 986 
 987 void sql_select_return_states(const char *cols, struct expression *call,
 988         int (*callback)(void*, int, char**, char**), void *info);
 989 void sql_select_call_implies(const char *cols, struct expression *call,
 990         int (*callback)(void*, int, char**, char**));
 991 
 992 void open_smatch_db(char *db_file);
 993 
 994 /* smatch_files.c */
 995 int open_data_file(const char *filename);
 996 int open_schema_file(const char *schema);
 997 struct token *get_tokens_file(const char *filename);
 998 
 999 /* smatch.c */
1000 extern char *option_debug_check;
1001 extern char *option_project_str;
1002 extern char *bin_dir;
1003 extern char *data_dir;
1004 extern int option_no_data;
1005 extern int option_full_path;


1021 
1022 
1023 /* smatch_buf_size.c */
1024 int get_array_size(struct expression *expr);
1025 int get_array_size_bytes(struct expression *expr);
1026 int get_array_size_bytes_min(struct expression *expr);
1027 int get_array_size_bytes_max(struct expression *expr);
1028 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1029 int get_real_array_size(struct expression *expr);
1030 int last_member_is_resizable(struct symbol *type);
1031 /* smatch_strlen.c */
1032 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1033 int get_size_from_strlen(struct expression *expr);
1034 
1035 /* smatch_capped.c */
1036 int is_capped(struct expression *expr);
1037 int is_capped_var_sym(const char *name, struct symbol *sym);
1038 
1039 /* check_user_data.c */
1040 int is_user_macro(struct expression *expr);

1041 int is_capped_user_data(struct expression *expr);
1042 int implied_user_data(struct expression *expr, struct range_list **rl);
1043 struct stree *get_user_stree(void);
1044 int get_user_rl(struct expression *expr, struct range_list **rl);

1045 int is_user_rl(struct expression *expr);
1046 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1047 bool user_rl_capped(struct expression *expr);
1048 struct range_list *var_user_rl(struct expression *expr);
1049 
1050 /* check_locking.c */
1051 void print_held_locks();
1052 
1053 /* check_assigned_expr.c */
1054 struct expression *get_assigned_expr(struct expression *expr);
1055 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1056 /* smatch_return_to_param.c */
1057 void __add_return_to_param_mapping(struct expression *assign, const char *return_string);
1058 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1059 
1060 /* smatch_comparison.c */
1061 struct compare_data {
1062         /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1063         struct expression *left;
1064         const char *left_var;
1065         struct var_sym_list *left_vsl;
1066         int comparison;
1067         struct expression *right;
1068         const char *right_var;
1069         struct var_sym_list *right_vsl;
1070 };
1071 DECLARE_ALLOCATOR(compare_data);
1072 struct smatch_state *alloc_compare_state(
1073                 struct expression *left,
1074                 const char *left_var, struct var_sym_list *left_vsl,
1075                 int comparison,
1076                 struct expression *right,
1077                 const char *right_var, struct var_sym_list *right_vsl);
1078 int filter_comparison(int orig, int op);
1079 int merge_comparisons(int one, int two);
1080 int combine_comparisons(int left_compare, int right_compare);
1081 int state_to_comparison(struct smatch_state *state);
1082 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1083 int get_comparison(struct expression *left, struct expression *right);
1084 int get_comparison_no_extra(struct expression *a, struct expression *b);
1085 int get_comparison_strings(const char *one, const char *two);
1086 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1087 struct state_list *get_all_comparisons(struct expression *expr);
1088 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1089 void __add_return_comparison(struct expression *call, const char *range);
1090 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1091 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1092 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1093 char *expr_equal_to_param(struct expression *expr, int ignore);
1094 char *expr_lte_to_param(struct expression *expr, int ignore);
1095 char *expr_param_comparison(struct expression *expr, int ignore);
1096 int flip_comparison(int op);
1097 int negate_comparison(int op);
1098 int remove_unsigned_from_comparison(int op);
1099 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1100 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1101 struct sm_state *comparison_implication_hook(struct expression *expr,
1102                         struct state_list **true_stack,
1103                         struct state_list **false_stack);
1104 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,


1119 int sval_bits_used(sval_t sval);
1120 int sval_is_negative(sval_t sval);
1121 int sval_is_positive(sval_t sval);
1122 int sval_is_min(sval_t sval);
1123 int sval_is_max(sval_t sval);
1124 int sval_is_a_min(sval_t sval);
1125 int sval_is_a_max(sval_t sval);
1126 int sval_is_negative_min(sval_t sval);
1127 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1128 int sval_cmp_val(sval_t one, long long val);
1129 sval_t sval_min(sval_t one, sval_t two);
1130 sval_t sval_max(sval_t one, sval_t two);
1131 int sval_too_low(struct symbol *type, sval_t sval);
1132 int sval_too_high(struct symbol *type, sval_t sval);
1133 int sval_fits(struct symbol *type, sval_t sval);
1134 sval_t sval_cast(struct symbol *type, sval_t sval);
1135 sval_t sval_preop(sval_t sval, int op);
1136 sval_t sval_binop(sval_t left, int op, sval_t right);
1137 int sval_binop_overflows(sval_t left, int op, sval_t right);
1138 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);
1139 int find_first_zero_bit(unsigned long long uvalue);
1140 int sm_fls64(unsigned long long uvalue);
1141 unsigned long long fls_mask(unsigned long long uvalue);
1142 unsigned long long sval_fls_mask(sval_t sval);
1143 const char *sval_to_str(sval_t sval);
1144 const char *sval_to_str_or_err_ptr(sval_t sval);
1145 const char *sval_to_numstr(sval_t sval);
1146 sval_t ll_to_sval(long long val);
1147 
1148 /* smatch_string_list.c */
1149 int list_has_string(struct string_list *str_list, const char *str);
1150 int insert_string(struct string_list **str_list, const char *str);
1151 struct string_list *clone_str_list(struct string_list *orig);
1152 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1153 
1154 /* smatch_start_states.c */
1155 struct stree *get_start_states(void);
1156 
1157 /* smatch_recurse.c */
1158 int has_symbol(struct expression *expr, struct symbol *sym);
1159 int has_variable(struct expression *expr, struct expression *var);
1160 int has_inc_dec(struct expression *expr);
1161 
1162 /* smatch_stored_conditions.c */
1163 struct smatch_state *get_stored_condition(struct expression *expr);
1164 struct expression_list *get_conditions(struct expression *expr);
1165 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1166                         struct state_list **true_stack,
1167                         struct state_list **false_stack);
1168 
1169 /* check_string_len.c */
1170 int get_formatted_string_size(struct expression *call, int arg);
1171 int get_formatted_string_min_size(struct expression *call, int arg);
1172 
1173 /* smatch_param_set.c */
1174 int param_was_set(struct expression *expr);
1175 int param_was_set_var_sym(const char *name, struct symbol *sym);
1176 /* smatch_param_filter.c */
1177 int param_has_filter_data(struct sm_state *sm);
1178 
1179 /* smatch_links.c */
1180 void set_up_link_functions(int id, int linkid);
1181 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1182 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1183 
1184 /* smatch_auto_copy.c */
1185 void set_auto_copy(int owner);
1186 
1187 /* check_buf_comparison */
1188 const char *limit_type_str(unsigned int limit_type);
1189 struct expression *get_size_variable(struct expression *buf, int *limit_type);
1190 struct expression *get_array_variable(struct expression *size);
1191 int buf_comparison_index_ok(struct expression *expr);
1192 
1193 /* smatch_untracked_param.c */
1194 void mark_untracked(struct expression *expr, int param, const char *key, const char *value);
1195 void add_untracked_param_hook(void (func)(struct expression *call, int param));
1196 void add_lost_param_hook(void (func)(struct expression *call, int param));
1197 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1198 
1199 /* smatch_strings.c */
1200 struct state_list *get_strings(struct expression *expr);
1201 struct expression *fake_string_from_mtag(mtag_t tag);
1202 
1203 /* smatch_estate.c */
1204 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1205 
1206 /* smatch_address.c */
1207 int get_address_rl(struct expression *expr, struct range_list **rl);
1208 int get_member_offset(struct symbol *type, const char *member_name);
1209 int get_member_offset_from_deref(struct expression *expr);
1210 
1211 /* for now this is in smatch_used_parameter.c */
1212 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1213 
1214 /* smatch_buf_comparison.c */
1215 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1216 
1217 struct stree *get_all_return_states(void);
1218 struct stree_stack *get_all_return_strees(void);
1219 int on_atomic_dec_path(void);
1220 int was_inced(const char *name, struct symbol *sym);
1221 
1222 /* smatch_constraints.c */
1223 char *get_constraint_str(struct expression *expr);
1224 struct constraint_list *get_constraints(struct expression *expr);
1225 char *unmet_constraint(struct expression *data, struct expression *offset);
1226 char *get_required_constraint(const char *data_str);
1227 
1228 /* smatch_container_of.c */
1229 int get_param_from_container_of(struct expression *expr);
1230 int get_offset_from_container_of(struct expression *expr);
1231 char *get_container_name(struct expression *container, struct expression *expr);
1232 
1233 /* smatch_mtag.c */
1234 int get_string_mtag(struct expression *expr, mtag_t *tag);
1235 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);


1236 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1237 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1238 void update_mtag_data(struct expression *expr);
1239 int get_mtag_sval(struct expression *expr, sval_t *sval);

1240 
1241 /* Trinity fuzzer stuff */
1242 const char *get_syscall_arg_type(struct symbol *sym);
1243 
1244 /* smatch_bit_info.c */
1245 struct bit_info *get_bit_info(struct expression *expr);
1246 struct bit_info *get_bit_info_var_sym(const char *name, struct symbol *sym);
1247 /* smatch_mem_tracker.c */
1248 extern int option_mem;
1249 unsigned long get_mem_kb(void);
1250 unsigned long get_max_memory(void);
1251 
1252 /* check_is_nospec.c */
1253 bool is_nospec(struct expression *expr);
1254 long get_stmt_cnt(void);
1255 
1256 /* smatch_nul_terminator.c */
1257 bool is_nul_terminated(struct expression *expr);
1258 /* check_kernel.c  */
1259 bool is_ignored_kernel_data(const char *name);
1260 
1261 static inline bool type_is_ptr(struct symbol *type)
1262 {
1263         return type &&
1264                (type->type == SYM_PTR ||
1265                 type->type == SYM_ARRAY ||
1266                 type->type == SYM_FN);
1267 }
1268 
1269 static inline int type_bits(struct symbol *type)
1270 {
1271         if (!type)
1272                 return 0;
1273         if (type_is_ptr(type))
1274                 return bits_in_pointer;


1275         if (!type->examined)
1276                 examine_symbol_type(type);
1277         return type->bit_size;
1278 }
1279 





1280 static inline int type_unsigned(struct symbol *base_type)
1281 {
1282         if (!base_type)
1283                 return 0;
1284         if (is_ptr_type(base_type))
1285                 return 1;
1286         if (base_type->ctype.modifiers & MOD_UNSIGNED)
1287                 return 1;
1288         return 0;
1289 }
1290 
1291 static inline int type_positive_bits(struct symbol *type)
1292 {
1293         if (!type)
1294                 return 0;
1295         if (is_ptr_type(type))
1296                 return bits_in_pointer;
1297         if (type_unsigned(type))
1298                 return type_bits(type);
1299         return type_bits(type) - 1;
1300 }
1301 
1302 static inline int sval_positive_bits(sval_t sval)
1303 {
1304         return type_positive_bits(sval.type);
1305 }
1306 
1307 /*
1308  * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1309  */
1310 static inline int sval_cmp(sval_t one, sval_t two)
1311 {
1312         struct symbol *type;
1313 
1314         type = one.type;
1315         if (sval_positive_bits(two) > sval_positive_bits(one))
1316                 type = two.type;