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;
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