2 * Copyright (C) 2006 Dan Carpenter.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
29 #include "expression.h"
36 unsigned long long uvalue
;
44 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
45 extern struct smatch_state undefined
;
46 extern struct smatch_state ghost
;
47 extern struct smatch_state merged
;
48 extern struct smatch_state true_state
;
49 extern struct smatch_state false_state
;
50 DECLARE_ALLOCATOR(smatch_state
);
52 static inline void *INT_PTR(int i
)
54 return (void *)(long)i
;
57 static inline int PTR_INT(void *p
)
67 DECLARE_ALLOCATOR(tracker
);
68 DECLARE_PTR_LIST(tracker_list
, struct tracker
);
69 DECLARE_PTR_LIST(stree_stack
, struct stree
);
71 /* The first 3 struct members must match struct tracker */
76 unsigned short merged
:1;
77 unsigned int nr_children
;
79 struct smatch_state
*state
;
81 struct sm_state
*left
;
82 struct sm_state
*right
;
83 struct state_list
*possible
;
90 DECLARE_ALLOCATOR(var_sym
);
91 DECLARE_PTR_LIST(var_sym_list
, struct var_sym
);
97 DECLARE_PTR_LIST(constraint_list
, struct constraint
);
107 ASSIGNMENT_HOOK_AFTER
,
109 GLOBAL_ASSIGNMENT_HOOK
,
114 WHOLE_CONDITION_HOOK
,
116 CALL_HOOK_AFTER_INLINE
,
117 FUNCTION_CALL_HOOK_AFTER_DB
,
118 CALL_ASSIGNMENT_HOOK
,
119 MACRO_ASSIGNMENT_HOOK
,
144 void add_hook(void *func
, enum hook_type type
);
145 typedef struct smatch_state
*(merge_func_t
)(struct smatch_state
*s1
, struct smatch_state
*s2
);
146 typedef struct smatch_state
*(unmatched_func_t
)(struct sm_state
*state
);
147 void add_merge_hook(int client_id
, merge_func_t
*func
);
148 void add_unmatched_state_hook(int client_id
, unmatched_func_t
*func
);
149 void add_pre_merge_hook(int client_id
, void (*hook
)(struct sm_state
*sm
));
150 typedef void (scope_hook
)(void *data
);
151 void add_scope_hook(scope_hook
*hook
, void *data
);
152 typedef void (func_hook
)(const char *fn
, struct expression
*expr
, void *data
);
153 typedef void (implication_hook
)(const char *fn
, struct expression
*call_expr
,
154 struct expression
*assign_expr
, void *data
);
155 typedef void (return_implies_hook
)(struct expression
*call_expr
,
156 int param
, char *key
, char *value
);
157 typedef int (implied_return_hook
)(struct expression
*call_expr
, void *info
, struct range_list
**rl
);
158 void add_function_hook(const char *look_for
, func_hook
*call_back
, void *data
);
160 void add_function_assign_hook(const char *look_for
, func_hook
*call_back
,
162 void add_implied_return_hook(const char *look_for
,
163 implied_return_hook
*call_back
,
165 void add_macro_assign_hook(const char *look_for
, func_hook
*call_back
,
167 void add_macro_assign_hook_extra(const char *look_for
, func_hook
*call_back
,
169 void return_implies_state(const char *look_for
, long long start
, long long end
,
170 implication_hook
*call_back
, void *info
);
171 void select_return_states_hook(int type
, return_implies_hook
*callback
);
172 void select_return_states_before(void (*fn
)(void));
173 void select_return_states_after(void (*fn
)(void));
174 int get_implied_return(struct expression
*expr
, struct range_list
**rl
);
175 void allocate_hook_memory(void);
177 struct modification_data
{
178 struct smatch_state
*prev
;
179 struct expression
*cur
;
182 typedef void (modification_hook
)(struct sm_state
*sm
, struct expression
*mod_expr
);
183 void add_modification_hook(int owner
, modification_hook
*call_back
);
184 void add_modification_hook_late(int owner
, modification_hook
*call_back
);
185 struct smatch_state
*get_modification_state(struct expression
*expr
);
187 int outside_of_function(void);
188 const char *get_filename(void);
189 const char *get_base_file(void);
190 char *get_function(void);
191 int get_lineno(void);
192 extern int final_pass
;
193 extern struct symbol
*cur_func_sym
;
194 extern int option_debug
;
195 extern int local_debug
;
196 extern int option_info
;
197 extern int option_spammy
;
198 extern char *trace_variable
;
199 extern struct stree
*global_states
;
200 int is_silenced_function(void);
202 /* smatch_impossible.c */
203 int is_impossible_path(void);
204 void set_path_impossible(void);
206 extern FILE *sm_outfd
;
207 extern FILE *sql_outfd
;
208 extern FILE *caller_info_fd
;
209 #define sm_printf(msg...) do { if (final_pass || option_debug || local_debug) fprintf(sm_outfd, msg); } while (0)
211 static inline void sm_prefix(void)
213 sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
216 static inline void print_implied_debug_msg();
218 #define sm_msg(msg...) \
220 print_implied_debug_msg(); \
221 if (!option_debug && !final_pass && !local_debug) \
223 if (!option_info && is_silenced_function()) \
230 #define local_debug(msg...) \
236 extern char *implied_debug_msg
;
237 static inline void print_implied_debug_msg(void)
239 static struct symbol
*last_printed
= NULL
;
241 if (!implied_debug_msg
)
243 if (last_printed
== cur_func_sym
)
245 last_printed
= cur_func_sym
;
246 sm_msg("%s", implied_debug_msg
);
249 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
251 #define sm_info(msg...) do { \
252 if (option_debug || (option_info && final_pass)) { \
254 sm_printf("info: "); \
260 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
262 struct smatch_state
*__get_state(int owner
, const char *name
, struct symbol
*sym
);
263 struct smatch_state
*get_state(int owner
, const char *name
, struct symbol
*sym
);
264 struct smatch_state
*get_state_expr(int owner
, struct expression
*expr
);
265 struct state_list
*get_possible_states(int owner
, const char *name
,
267 struct state_list
*get_possible_states_expr(int owner
, struct expression
*expr
);
268 struct sm_state
*set_state(int owner
, const char *name
, struct symbol
*sym
,
269 struct smatch_state
*state
);
270 struct sm_state
*set_state_expr(int owner
, struct expression
*expr
,
271 struct smatch_state
*state
);
272 void delete_state(int owner
, const char *name
, struct symbol
*sym
);
273 void delete_state_expr(int owner
, struct expression
*expr
);
274 void __delete_all_states_sym(struct symbol
*sym
);
275 void set_true_false_states(int owner
, const char *name
, struct symbol
*sym
,
276 struct smatch_state
*true_state
,
277 struct smatch_state
*false_state
);
278 void set_true_false_states_expr(int owner
, struct expression
*expr
,
279 struct smatch_state
*true_state
,
280 struct smatch_state
*false_state
);
282 struct stree
*get_all_states_from_stree(int owner
, struct stree
*source
);
283 struct stree
*get_all_states_stree(int id
);
284 struct stree
*__get_cur_stree(void);
285 int is_reachable(void);
286 void add_get_state_hook(void (*fn
)(int owner
, const char *name
, struct symbol
*sym
));
288 /* smatch_helper.c */
289 DECLARE_PTR_LIST(int_stack
, int);
290 char *alloc_string(const char *str
);
291 void free_string(char *str
);
292 void append(char *dest
, const char *data
, int buff_len
);
293 void remove_parens(char *str
);
294 struct smatch_state
*alloc_state_num(int num
);
295 struct smatch_state
*alloc_state_str(const char *name
);
296 struct smatch_state
*alloc_state_expr(struct expression
*expr
);
297 struct expression
*get_argument_from_call_expr(struct expression_list
*args
,
300 char *expr_to_var(struct expression
*expr
);
301 struct symbol
*expr_to_sym(struct expression
*expr
);
302 char *expr_to_str(struct expression
*expr
);
303 char *expr_to_str_sym(struct expression
*expr
,
304 struct symbol
**sym_ptr
);
305 char *expr_to_var_sym(struct expression
*expr
,
306 struct symbol
**sym_ptr
);
307 char *expr_to_known_chunk_sym(struct expression
*expr
, struct symbol
**sym
);
308 char *expr_to_chunk_sym_vsl(struct expression
*expr
, struct symbol
**sym
, struct var_sym_list
**vsl
);
309 int get_complication_score(struct expression
*expr
);
311 int sym_name_is(const char *name
, struct expression
*expr
);
312 int get_const_value(struct expression
*expr
, sval_t
*sval
);
313 int get_value(struct expression
*expr
, sval_t
*val
);
314 int get_implied_value(struct expression
*expr
, sval_t
*val
);
315 int get_implied_min(struct expression
*expr
, sval_t
*sval
);
316 int get_implied_max(struct expression
*expr
, sval_t
*val
);
317 int get_hard_max(struct expression
*expr
, sval_t
*sval
);
318 int get_fuzzy_min(struct expression
*expr
, sval_t
*min
);
319 int get_fuzzy_max(struct expression
*expr
, sval_t
*max
);
320 int get_absolute_min(struct expression
*expr
, sval_t
*sval
);
321 int get_absolute_max(struct expression
*expr
, sval_t
*sval
);
322 int parse_call_math(struct expression
*expr
, char *math
, sval_t
*val
);
323 int parse_call_math_rl(struct expression
*call
, char *math
, struct range_list
**rl
);
324 char *get_value_in_terms_of_parameter_math(struct expression
*expr
);
325 char *get_value_in_terms_of_parameter_math_var_sym(const char *var
, struct symbol
*sym
);
326 int is_zero(struct expression
*expr
);
327 int known_condition_true(struct expression
*expr
);
328 int known_condition_false(struct expression
*expr
);
329 int implied_condition_true(struct expression
*expr
);
330 int implied_condition_false(struct expression
*expr
);
331 int can_integer_overflow(struct symbol
*type
, struct expression
*expr
);
333 int is_array(struct expression
*expr
);
334 struct expression
*get_array_base(struct expression
*expr
);
335 struct expression
*get_array_offset(struct expression
*expr
);
336 const char *show_state(struct smatch_state
*state
);
337 struct statement
*get_expression_statement(struct expression
*expr
);
338 struct expression
*strip_parens(struct expression
*expr
);
339 struct expression
*strip_expr(struct expression
*expr
);
340 void scoped_state(int my_id
, const char *name
, struct symbol
*sym
);
341 int is_error_return(struct expression
*expr
);
342 int getting_address(void);
343 int get_struct_and_member(struct expression
*expr
, const char **type
, const char **member
);
344 char *get_member_name(struct expression
*expr
);
345 char *get_fnptr_name(struct expression
*expr
);
346 int cmp_pos(struct position pos1
, struct position pos2
);
347 int positions_eq(struct position pos1
, struct position pos2
);
348 struct statement
*get_current_statement(void);
349 struct statement
*get_prev_statement(void);
350 int get_param_num_from_sym(struct symbol
*sym
);
351 int get_param_num(struct expression
*expr
);
352 int ms_since(struct timeval
*start
);
353 int parent_is_gone_var_sym(const char *name
, struct symbol
*sym
);
354 int parent_is_gone(struct expression
*expr
);
355 int invert_op(int op
);
356 int expr_equiv(struct expression
*one
, struct expression
*two
);
357 void push_int(struct int_stack
**stack
, int num
);
358 int pop_int(struct int_stack
**stack
);
361 struct symbol
*get_real_base_type(struct symbol
*sym
);
362 int type_bytes(struct symbol
*type
);
363 int array_bytes(struct symbol
*type
);
364 struct symbol
*get_pointer_type(struct expression
*expr
);
365 struct symbol
*get_type(struct expression
*expr
);
366 int type_signed(struct symbol
*base_type
);
367 int expr_unsigned(struct expression
*expr
);
368 int expr_signed(struct expression
*expr
);
369 int returns_unsigned(struct symbol
*base_type
);
370 int is_pointer(struct expression
*expr
);
371 int returns_pointer(struct symbol
*base_type
);
372 sval_t
sval_type_max(struct symbol
*base_type
);
373 sval_t
sval_type_min(struct symbol
*base_type
);
374 int nr_bits(struct expression
*expr
);
375 int is_void_pointer(struct expression
*expr
);
376 int is_char_pointer(struct expression
*expr
);
377 int is_string(struct expression
*expr
);
378 int is_static(struct expression
*expr
);
379 int is_local_variable(struct expression
*expr
);
380 int types_equiv(struct symbol
*one
, struct symbol
*two
);
382 const char *global_static();
383 struct symbol
*cur_func_return_type(void);
384 struct symbol
*get_arg_type(struct expression
*fn
, int arg
);
385 struct symbol
*get_member_type_from_key(struct expression
*expr
, char *key
);
386 int is_struct(struct expression
*expr
);
387 char *type_to_str(struct symbol
*type
);
389 /* smatch_ignore.c */
390 void add_ignore(int owner
, const char *name
, struct symbol
*sym
);
391 int is_ignored(int owner
, const char *name
, struct symbol
*sym
);
394 struct var_sym
*alloc_var_sym(const char *var
, struct symbol
*sym
);
395 struct var_sym_list
*expr_to_vsl(struct expression
*expr
);
396 void add_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
397 void add_var_sym_expr(struct var_sym_list
**list
, struct expression
*expr
);
398 void del_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
399 int in_var_sym_list(struct var_sym_list
*list
, const char *var
, struct symbol
*sym
);
400 struct var_sym_list
*clone_var_sym_list(struct var_sym_list
*from_vsl
);
401 void merge_var_sym_list(struct var_sym_list
**dest
, struct var_sym_list
*src
);
402 struct var_sym_list
*combine_var_sym_lists(struct var_sym_list
*one
, struct var_sym_list
*two
);
403 int var_sym_lists_equiv(struct var_sym_list
*one
, struct var_sym_list
*two
);
404 void free_var_sym_list(struct var_sym_list
**list
);
405 void free_var_syms_and_list(struct var_sym_list
**list
);
408 struct tracker
*alloc_tracker(int owner
, const char *name
, struct symbol
*sym
);
409 void add_tracker(struct tracker_list
**list
, int owner
, const char *name
,
411 void add_tracker_expr(struct tracker_list
**list
, int owner
, struct expression
*expr
);
412 void del_tracker(struct tracker_list
**list
, int owner
, const char *name
,
414 int in_tracker_list(struct tracker_list
*list
, int owner
, const char *name
,
416 void free_tracker_list(struct tracker_list
**list
);
417 void free_trackers_and_list(struct tracker_list
**list
);
419 /* smatch_conditions */
420 int in_condition(void);
424 extern int __in_fake_assign
;
425 void smatch (int argc
, char **argv
);
426 int inside_loop(void);
427 int definitely_inside_loop(void);
428 struct expression
*get_switch_expr(void);
429 int in_expression_statement(void);
430 void __process_post_op_stack(void);
431 void __split_expr(struct expression
*expr
);
432 void __split_label_stmt(struct statement
*stmt
);
433 void __split_stmt(struct statement
*stmt
);
434 extern int __in_function_def
;
435 extern int option_assume_loops
;
436 extern int option_two_passes
;
437 extern int option_no_db
;
438 extern int option_file_output
;
439 extern int option_time
;
440 extern struct expression_list
*big_expression_stack
;
441 extern struct expression_list
*big_condition_stack
;
442 extern struct statement_list
*big_statement_stack
;
443 int is_assigned_call(struct expression
*expr
);
444 int inlinable(struct expression
*expr
);
445 extern int __inline_call
;
446 extern struct expression
*__inline_fn
;
447 extern int __in_pre_condition
;
448 extern int __bail_on_rest_of_function
;
449 extern struct statement
*__prev_stmt
;
450 extern struct statement
*__cur_stmt
;
451 extern struct statement
*__next_stmt
;
452 void init_fake_env(void);
453 void end_fake_env(void);
455 /* smatch_struct_assignment.c */
456 struct expression
*get_faked_expression(void);
457 void __fake_struct_member_assignments(struct expression
*expr
);
459 /* smatch_project.c */
460 int is_no_inline_function(const char *function
);
462 /* smatch_conditions */
463 void __split_whole_condition(struct expression
*expr
);
464 void __handle_logic(struct expression
*expr
);
465 int is_condition(struct expression
*expr
);
466 int __handle_condition_assigns(struct expression
*expr
);
467 int __handle_select_assigns(struct expression
*expr
);
468 int __handle_expr_statement_assigns(struct expression
*expr
);
470 /* smatch_implied.c */
471 extern int option_debug_implied
;
472 extern int option_debug_related
;
473 struct range_list_stack
;
474 void param_limit_implications(struct expression
*expr
, int param
, char *key
, char *value
);
475 struct stree
*__implied_case_stree(struct expression
*switch_expr
,
476 struct range_list
*case_rl
,
477 struct range_list_stack
**remaining_cases
,
478 struct stree
**raw_stree
);
479 void overwrite_states_using_pool(struct sm_state
*gate_sm
, struct sm_state
*pool_sm
);
480 int assume(struct expression
*expr
);
481 void end_assume(void);
483 /* smatch_extras.c */
484 #define SMATCH_EXTRA 4 /* this is my_id from smatch extra set in smatch.c */
485 extern int RETURN_ID
;
492 extern long long valid_ptr_min
, valid_ptr_max
;
493 extern sval_t valid_ptr_min_sval
, valid_ptr_max_sval
;
494 static const sval_t array_min_sval
= {
498 static const sval_t array_max_sval
= {
502 static const sval_t text_seg_min
= {
504 {.value
= 100000000},
506 static const sval_t text_seg_max
= {
508 {.value
= 177777777},
510 static const sval_t data_seg_min
= {
512 {.value
= 200000000},
514 static const sval_t data_seg_max
= {
516 {.value
= 277777777},
518 static const sval_t bss_seg_min
= {
520 {.value
= 300000000},
522 static const sval_t bss_seg_max
= {
524 {.value
= 377777777},
526 static const sval_t stack_seg_min
= {
528 {.value
= 400000000},
530 static const sval_t stack_seg_max
= {
532 {.value
= 477777777},
534 static const sval_t kmalloc_seg_min
= {
536 {.value
= 500000000},
538 static const sval_t kmalloc_seg_max
= {
540 {.value
= 577777777},
542 static const sval_t vmalloc_seg_min
= {
544 {.value
= 600000000},
546 static const sval_t vmalloc_seg_max
= {
548 {.value
= 677777777},
550 static const sval_t fn_ptr_min
= {
552 {.value
= 700000000},
554 static const sval_t fn_ptr_max
= {
556 {.value
= 777777777},
559 char *get_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
560 char *map_call_to_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
561 char *map_long_to_short_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
562 char *map_long_to_short_name_sym_nostack(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
564 #define STRLEN_MAX_RET 1010101
566 /* smatch_absolute.c */
567 int get_absolute_min_helper(struct expression
*expr
, sval_t
*sval
);
568 int get_absolute_max_helper(struct expression
*expr
, sval_t
*sval
);
570 /* smatch_local_values.c */
571 int get_local_rl(struct expression
*expr
, struct range_list
**rl
);
572 int get_local_max_helper(struct expression
*expr
, sval_t
*sval
);
573 int get_local_min_helper(struct expression
*expr
, sval_t
*sval
);
575 /* smatch_type_value.c */
576 int get_db_type_rl(struct expression
*expr
, struct range_list
**rl
);
577 /* smatch_data_val.c */
578 int get_db_data_rl(struct expression
*expr
, struct range_list
**rl
);
580 /* smatch_states.c */
581 void __swap_cur_stree(struct stree
*stree
);
582 void __push_fake_cur_stree();
583 struct stree
*__pop_fake_cur_stree();
584 void __free_fake_cur_stree();
585 void __set_fake_cur_stree_fast(struct stree
*stree
);
586 void __pop_fake_cur_stree_fast(void);
587 void __merge_stree_into_cur(struct stree
*stree
);
589 int unreachable(void);
590 void __set_sm(struct sm_state
*sm
);
591 void __set_sm_cur_stree(struct sm_state
*sm
);
592 void __set_sm_fake_stree(struct sm_state
*sm
);
593 void __set_true_false_sm(struct sm_state
*true_state
,
594 struct sm_state
*false_state
);
595 void nullify_path(void);
596 void __match_nullify_path_hook(const char *fn
, struct expression
*expr
,
598 void __unnullify_path(void);
599 int __path_is_null(void);
600 void save_all_states(void);
601 void restore_all_states(void);
602 void free_goto_stack(void);
603 void clear_all_states(void);
605 struct sm_state
*get_sm_state(int owner
, const char *name
,
607 struct sm_state
*get_sm_state_expr(int owner
, struct expression
*expr
);
608 void __push_true_states(void);
609 void __use_false_states(void);
610 void __discard_false_states(void);
611 void __merge_false_states(void);
612 void __merge_true_states(void);
614 void __negate_cond_stacks(void);
615 void __use_pre_cond_states(void);
616 void __use_cond_true_states(void);
617 void __use_cond_false_states(void);
618 void __push_cond_stacks(void);
619 void __fold_in_set_states(void);
620 void __free_set_states(void);
621 struct stree
*__copy_cond_true_states(void);
622 struct stree
*__copy_cond_false_states(void);
623 struct stree
*__pop_cond_true_stack(void);
624 struct stree
*__pop_cond_false_stack(void);
625 void __and_cond_states(void);
626 void __or_cond_states(void);
627 void __save_pre_cond_states(void);
628 void __discard_pre_cond_states(void);
629 struct stree
*__get_true_states(void);
630 struct stree
*__get_false_states(void);
631 void __use_cond_states(void);
632 extern struct state_list
*__last_base_slist
;
634 void __push_continues(void);
635 void __discard_continues(void);
636 void __process_continues(void);
637 void __merge_continues(void);
639 void __push_breaks(void);
640 void __process_breaks(void);
641 int __has_breaks(void);
642 void __merge_breaks(void);
643 void __use_breaks(void);
645 void __save_switch_states(struct expression
*switch_expr
);
646 void __discard_switches(void);
647 void __merge_switches(struct expression
*switch_expr
, struct range_list
*case_rl
);
648 void __push_default(void);
649 void __set_default(void);
650 int __pop_default(void);
652 void __push_conditions(void);
653 void __discard_conditions(void);
655 void __save_gotos(const char *name
, struct symbol
*sym
);
656 void __merge_gotos(const char *name
, struct symbol
*sym
);
658 void __print_cur_stree(void);
661 void __pass_to_client(void *data
, enum hook_type type
);
662 void __pass_to_client_no_data(enum hook_type type
);
663 void __pass_case_to_client(struct expression
*switch_expr
,
664 struct range_list
*rl
);
665 int __has_merge_function(int client_id
);
666 struct smatch_state
*__client_merge_function(int owner
,
667 struct smatch_state
*s1
,
668 struct smatch_state
*s2
);
669 struct smatch_state
*__client_unmatched_state_function(struct sm_state
*sm
);
670 void call_pre_merge_hook(struct sm_state
*sm
);
671 void __push_scope_hooks(void);
672 void __call_scope_hooks(void);
674 /* smatch_function_hooks.c */
675 void create_function_hook_hash(void);
676 void __match_initializer_call(struct symbol
*sym
);
682 * Changing these numbers is a pain. Don't do it. If you ever use a
683 * number it can't be re-used right away so there may be gaps.
684 * We select these in order by type so if the order matters, then give
685 * it a number below 100-999,9000-9999 ranges. */
699 LOCK_RELEASED
= 1009,
700 ABSOLUTE_LIMITS
= 1010,
712 UNTRACKED_PARAM
= 1023,
717 COMPARE_LIMIT
= 1028,
718 PARAM_COMPARE
= 1029,
721 CONSTRAINT_REQUIRED
= 1033,
723 /* put random temporary stuff in the 7000-7999 range for testing */
725 USER_DATA3_SET
= 9017,
727 NO_OVERFLOW_SIMPLE
= 8019,
733 NO_SIDE_EFFECT
= 8025,
736 ARRAYSIZE_ARG
= 8033,
740 void debug_sql(const char *sql
);
741 void debug_mem_sql(const char *sql
);
742 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
);
743 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
));
744 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
));
745 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
));
746 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
747 struct range_list
*db_return_vals(struct expression
*expr
);
748 struct range_list
*db_return_vals_from_str(const char *fn_name
);
749 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
);
750 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
);
751 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
);
752 const char *state_name_to_param_name(const char *state_name
, const char *param_name
);
753 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
);
754 const char *get_param_name(struct sm_state
*sm
);
755 char *get_data_info_name(struct expression
*expr
);
757 #define run_sql(call_back, data, sql...) \
759 char sql_txt[1024]; \
762 snprintf(sql_txt, 1024, sql); \
763 debug_sql(sql_txt); \
764 sql_exec(call_back, data, sql_txt); \
767 /* like run_sql() but for the in-memory database */
768 #define mem_sql(call_back, data, sql...) \
770 char sql_txt[1024]; \
772 snprintf(sql_txt, sizeof(sql_txt), sql); \
773 sm_debug("in-mem: %s\n", sql_txt); \
774 debug_mem_sql(sql_txt); \
775 sql_mem_exec(call_back, data, sql_txt); \
778 char *get_static_filter(struct symbol
*sym
);
780 void sql_insert_return_states(int return_id
, const char *return_ranges
,
781 int type
, int param
, const char *key
, const char *value
);
782 void sql_insert_caller_info(struct expression
*call
, int type
, int param
,
783 const char *key
, const char *value
);
784 void sql_insert_function_ptr(const char *fn
, const char *struct_name
);
785 void sql_insert_return_values(const char *return_values
);
786 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
);
787 void sql_insert_function_type_size(const char *member
, const char *ranges
);
788 void sql_insert_local_values(const char *name
, const char *value
);
789 void sql_insert_function_type_value(const char *type
, const char *value
);
790 void sql_insert_function_type(int param
, const char *value
);
791 void sql_insert_parameter_name(int param
, const char *value
);
792 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
);
793 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
);
794 void sql_save_constraint(const char *con
);
795 void sql_save_constraint_required(const char *data
, int op
, const char *limit
);
796 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
);
797 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
);
799 void sql_select_return_states(const char *cols
, struct expression
*call
,
800 int (*callback
)(void*, int, char**, char**), void *info
);
801 void sql_select_call_implies(const char *cols
, struct expression
*call
,
802 int (*callback
)(void*, int, char**, char**));
804 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
);
805 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
);
807 void open_smatch_db(void);
810 int open_data_file(const char *filename
);
811 struct token
*get_tokens_file(const char *filename
);
814 extern char *option_debug_check
;
815 extern char *option_project_str
;
816 extern char *data_dir
;
817 extern int option_no_data
;
818 extern int option_full_path
;
819 extern int option_param_mapper
;
820 extern int option_call_tree
;
821 extern int num_checks
;
829 extern enum project_type option_project
;
830 const char *check_name(unsigned short id
);
831 int id_from_name(const char *name
);
834 /* smatch_buf_size.c */
835 int get_array_size(struct expression
*expr
);
836 int get_array_size_bytes(struct expression
*expr
);
837 int get_array_size_bytes_min(struct expression
*expr
);
838 int get_array_size_bytes_max(struct expression
*expr
);
839 struct range_list
*get_array_size_bytes_rl(struct expression
*expr
);
840 int get_real_array_size(struct expression
*expr
);
841 /* smatch_strlen.c */
842 int get_implied_strlen(struct expression
*expr
, struct range_list
**rl
);
843 int get_size_from_strlen(struct expression
*expr
);
845 /* smatch_capped.c */
846 int is_capped(struct expression
*expr
);
847 int is_capped_var_sym(const char *name
, struct symbol
*sym
);
849 /* check_user_data.c */
850 int is_user_macro(struct expression
*expr
);
851 int is_user_data(struct expression
*expr
);
852 int is_capped_user_data(struct expression
*expr
);
853 int implied_user_data(struct expression
*expr
, struct range_list
**rl
);
854 int get_user_rl(struct expression
*expr
, struct range_list
**rl
);
855 int get_user_rl_var_sym(const char *name
, struct symbol
*sym
, struct range_list
**rl
);
857 /* check_locking.c */
858 void print_held_locks();
860 /* check_assigned_expr.c */
861 struct expression
*get_assigned_expr(struct expression
*expr
);
862 struct expression
*get_assigned_expr_name_sym(const char *name
, struct symbol
*sym
);
863 /* smatch_return_to_param.c */
864 void __add_return_to_param_mapping(struct expression
*assign
, const char *return_string
);
865 char *map_call_to_param_name_sym(struct expression
*expr
, struct symbol
**sym
);
867 /* smatch_comparison.c */
868 struct compare_data
{
870 struct var_sym_list
*vsl1
;
873 struct var_sym_list
*vsl2
;
875 DECLARE_ALLOCATOR(compare_data
);
876 struct smatch_state
*alloc_compare_state(
877 const char *var1
, struct var_sym_list
*vsl1
,
879 const char *var2
, struct var_sym_list
*vsl2
);
880 int merge_comparisons(int one
, int two
);
881 int combine_comparisons(int left_compare
, int right_compare
);
882 int state_to_comparison(struct smatch_state
*state
);
883 struct smatch_state
*merge_compare_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
884 int get_comparison(struct expression
*left
, struct expression
*right
);
885 int get_comparison_strings(const char *one
, const char *two
);
886 int possible_comparison(struct expression
*a
, int comparison
, struct expression
*b
);
887 struct state_list
*get_all_comparisons(struct expression
*expr
);
888 struct state_list
*get_all_possible_equal_comparisons(struct expression
*expr
);
889 void __add_return_comparison(struct expression
*call
, const char *range
);
890 void __add_comparison_info(struct expression
*expr
, struct expression
*call
, const char *range
);
891 char *get_printed_param_name(struct expression
*call
, const char *param_name
, struct symbol
*param_sym
);
892 char *name_sym_to_param_comparison(const char *name
, struct symbol
*sym
);
893 char *expr_equal_to_param(struct expression
*expr
, int ignore
);
894 char *expr_lte_to_param(struct expression
*expr
, int ignore
);
895 char *expr_param_comparison(struct expression
*expr
, int ignore
);
896 int flip_comparison(int op
);
897 int negate_comparison(int op
);
898 int param_compare_limit_is_impossible(struct expression
*expr
, int left_param
, char *left_key
, char *value
);
899 void filter_by_comparison(struct range_list
**rl
, int comparison
, struct range_list
*right
);
900 struct sm_state
*comparison_implication_hook(struct expression
*expr
,
901 struct state_list
**true_stack
,
902 struct state_list
**false_stack
);
903 void __compare_param_limit_hook(struct expression
*left_expr
, struct expression
*right_expr
,
904 const char *state_name
,
905 struct smatch_state
*true_state
, struct smatch_state
*false_state
);
909 sval_t
*sval_alloc(sval_t sval
);
910 sval_t
*sval_alloc_permanent(sval_t sval
);
911 sval_t
sval_blank(struct expression
*expr
);
912 sval_t
sval_type_val(struct symbol
*type
, long long val
);
913 sval_t
sval_from_val(struct expression
*expr
, long long val
);
914 int sval_unsigned(sval_t sval
);
915 int sval_signed(sval_t sval
);
916 int sval_bits(sval_t sval
);
917 int sval_bits_used(sval_t sval
);
918 int sval_is_negative(sval_t sval
);
919 int sval_is_positive(sval_t sval
);
920 int sval_is_min(sval_t sval
);
921 int sval_is_max(sval_t sval
);
922 int sval_is_a_min(sval_t sval
);
923 int sval_is_a_max(sval_t sval
);
924 int sval_is_negative_min(sval_t sval
);
925 int sval_cmp_t(struct symbol
*type
, sval_t one
, sval_t two
);
926 int sval_cmp_val(sval_t one
, long long val
);
927 sval_t
sval_min(sval_t one
, sval_t two
);
928 sval_t
sval_max(sval_t one
, sval_t two
);
929 int sval_too_low(struct symbol
*type
, sval_t sval
);
930 int sval_too_high(struct symbol
*type
, sval_t sval
);
931 int sval_fits(struct symbol
*type
, sval_t sval
);
932 sval_t
sval_cast(struct symbol
*type
, sval_t sval
);
933 sval_t
sval_preop(sval_t sval
, int op
);
934 sval_t
sval_binop(sval_t left
, int op
, sval_t right
);
935 int sval_binop_overflows(sval_t left
, int op
, sval_t right
);
936 unsigned long long fls_mask(unsigned long long uvalue
);
937 unsigned long long sval_fls_mask(sval_t sval
);
938 const char *sval_to_str(sval_t sval
);
939 const char *sval_to_numstr(sval_t sval
);
940 sval_t
ll_to_sval(long long val
);
942 /* smatch_string_list.c */
943 int list_has_string(struct string_list
*str_list
, const char *str
);
944 void insert_string(struct string_list
**str_list
, const char *str
);
945 struct string_list
*clone_str_list(struct string_list
*orig
);
946 struct string_list
*combine_string_lists(struct string_list
*one
, struct string_list
*two
);
948 /* smatch_start_states.c */
949 struct stree
*get_start_states(void);
951 /* smatch_recurse.c */
952 int has_symbol(struct expression
*expr
, struct symbol
*sym
);
953 int has_variable(struct expression
*expr
, struct expression
*var
);
954 int has_inc_dec(struct expression
*expr
);
956 /* smatch_stored_conditions.c */
957 struct smatch_state
*get_stored_condition(struct expression
*expr
);
958 struct expression_list
*get_conditions(struct expression
*expr
);
959 struct sm_state
*stored_condition_implication_hook(struct expression
*expr
,
960 struct state_list
**true_stack
,
961 struct state_list
**false_stack
);
963 /* check_string_len.c */
964 int get_formatted_string_size(struct expression
*call
, int arg
);
966 /* smatch_param_set.c */
967 int param_was_set(struct expression
*expr
);
968 int param_was_set_var_sym(const char *name
, struct symbol
*sym
);
969 /* smatch_param_filter.c */
970 int param_has_filter_data(struct sm_state
*sm
);
973 void set_up_link_functions(int id
, int linkid
);
974 struct smatch_state
*merge_link_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
975 void store_link(int link_id
, const char *name
, struct symbol
*sym
, const char *link_name
, struct symbol
*link_sym
);
977 /* smatch_auto_copy.c */
978 void set_auto_copy(int owner
);
980 /* check_buf_comparison */
981 struct expression
*get_size_variable(struct expression
*buf
);
983 /* smatch_untracked_param.c */
984 void mark_untracked(struct expression
*expr
, int param
, const char *key
, const char *value
);
985 void add_untracked_param_hook(void (func
)(struct expression
*call
, int param
));
987 /* smatch_strings.c */
988 struct state_list
*get_strings(struct expression
*expr
);
990 /* smatch_estate.c */
991 int estate_get_single_value(struct smatch_state
*state
, sval_t
*sval
);
993 /* smatch_address.c */
994 int get_address_rl(struct expression
*expr
, struct range_list
**rl
);
995 int get_member_offset(struct symbol
*type
, char *member_name
);
996 int get_member_offset_from_deref(struct expression
*expr
);
998 /* for now this is in smatch_used_parameter.c */
999 void __get_state_hook(int owner
, const char *name
, struct symbol
*sym
);
1001 /* smatch_buf_comparison.c */
1002 int db_var_is_array_limit(struct expression
*array
, const char *name
, struct var_sym_list
*vsl
);
1004 struct stree
*get_all_return_states(void);
1005 struct stree_stack
*get_all_return_strees(void);
1006 int was_inced(const char *name
, struct symbol
*sym
);
1008 /* smatch_constraints.c */
1009 char *get_constraint_str(struct expression
*expr
);
1010 struct constraint_list
*get_constraints(struct expression
*expr
);
1011 char *unmet_constraint(struct expression
*data
, struct expression
*offset
);
1012 char *get_required_constraint(const char *data_str
);
1014 /* smatch_container_of.c */
1015 int get_param_from_container_of(struct expression
*expr
);
1016 int get_offset_from_container_of(struct expression
*expr
);
1018 static inline int type_bits(struct symbol
*type
)
1022 if (type
->type
== SYM_PTR
) /* Sparse doesn't set this for &pointers */
1023 return bits_in_pointer
;
1024 if (type
->type
== SYM_ARRAY
)
1025 return bits_in_pointer
;
1026 if (!type
->examined
)
1027 examine_symbol_type(type
);
1028 return type
->bit_size
;
1031 static inline int type_unsigned(struct symbol
*base_type
)
1035 if (base_type
->ctype
.modifiers
& MOD_UNSIGNED
)
1040 static inline int type_positive_bits(struct symbol
*type
)
1044 if (type
->type
== SYM_ARRAY
)
1045 return bits_in_pointer
- 1;
1046 if (type_unsigned(type
))
1047 return type_bits(type
);
1048 return type_bits(type
) - 1;
1051 static inline int sval_positive_bits(sval_t sval
)
1053 return type_positive_bits(sval
.type
);
1057 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1059 static inline int sval_cmp(sval_t one
, sval_t two
)
1061 struct symbol
*type
;
1064 if (sval_positive_bits(two
) > sval_positive_bits(one
))
1066 if (type_bits(type
) < 31)
1069 one
= sval_cast(type
, one
);
1070 two
= sval_cast(type
, two
);
1072 if (type_unsigned(type
)) {
1073 if (one
.uvalue
< two
.uvalue
)
1075 if (one
.uvalue
== two
.uvalue
)
1079 /* fix me handle type promotion and unsigned values */
1080 if (one
.value
< two
.value
)
1082 if (one
.value
== two
.value
)
1087 #endif /* !SMATCH_H_ */