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
;
40 typedef long long mtag_t
;
46 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
47 extern struct smatch_state undefined
;
48 extern struct smatch_state ghost
;
49 extern struct smatch_state merged
;
50 extern struct smatch_state true_state
;
51 extern struct smatch_state false_state
;
52 DECLARE_ALLOCATOR(smatch_state
);
54 static inline void *INT_PTR(int i
)
56 return (void *)(long)i
;
59 static inline int PTR_INT(void *p
)
69 DECLARE_ALLOCATOR(tracker
);
70 DECLARE_PTR_LIST(tracker_list
, struct tracker
);
71 DECLARE_PTR_LIST(stree_stack
, struct stree
);
73 /* The first 3 struct members must match struct tracker */
78 unsigned short merged
:1;
79 unsigned short skip_implications
:1;
80 unsigned int nr_children
;
82 struct smatch_state
*state
;
84 struct sm_state
*left
;
85 struct sm_state
*right
;
86 struct state_list
*possible
;
93 DECLARE_ALLOCATOR(var_sym
);
94 DECLARE_PTR_LIST(var_sym_list
, struct var_sym
);
100 DECLARE_PTR_LIST(constraint_list
, struct constraint
);
110 ASSIGNMENT_HOOK_AFTER
,
112 GLOBAL_ASSIGNMENT_HOOK
,
117 WHOLE_CONDITION_HOOK
,
119 CALL_HOOK_AFTER_INLINE
,
120 FUNCTION_CALL_HOOK_AFTER_DB
,
121 CALL_ASSIGNMENT_HOOK
,
122 MACRO_ASSIGNMENT_HOOK
,
147 void add_hook(void *func
, enum hook_type type
);
148 typedef struct smatch_state
*(merge_func_t
)(struct smatch_state
*s1
, struct smatch_state
*s2
);
149 typedef struct smatch_state
*(unmatched_func_t
)(struct sm_state
*state
);
150 void add_merge_hook(int client_id
, merge_func_t
*func
);
151 void add_unmatched_state_hook(int client_id
, unmatched_func_t
*func
);
152 void add_pre_merge_hook(int client_id
, void (*hook
)(struct sm_state
*sm
));
153 typedef void (scope_hook
)(void *data
);
154 void add_scope_hook(scope_hook
*hook
, void *data
);
155 typedef void (func_hook
)(const char *fn
, struct expression
*expr
, void *data
);
156 typedef void (implication_hook
)(const char *fn
, struct expression
*call_expr
,
157 struct expression
*assign_expr
, void *data
);
158 typedef void (return_implies_hook
)(struct expression
*call_expr
,
159 int param
, char *key
, char *value
);
160 typedef int (implied_return_hook
)(struct expression
*call_expr
, void *info
, struct range_list
**rl
);
161 void add_function_hook(const char *look_for
, func_hook
*call_back
, void *data
);
163 void add_function_assign_hook(const char *look_for
, func_hook
*call_back
,
165 void add_implied_return_hook(const char *look_for
,
166 implied_return_hook
*call_back
,
168 void add_macro_assign_hook(const char *look_for
, func_hook
*call_back
,
170 void add_macro_assign_hook_extra(const char *look_for
, func_hook
*call_back
,
172 void return_implies_state(const char *look_for
, long long start
, long long end
,
173 implication_hook
*call_back
, void *info
);
174 void select_return_states_hook(int type
, return_implies_hook
*callback
);
175 void select_return_states_before(void (*fn
)(void));
176 void select_return_states_after(void (*fn
)(void));
177 int get_implied_return(struct expression
*expr
, struct range_list
**rl
);
178 void allocate_hook_memory(void);
180 struct modification_data
{
181 struct smatch_state
*prev
;
182 struct expression
*cur
;
185 typedef void (modification_hook
)(struct sm_state
*sm
, struct expression
*mod_expr
);
186 void add_modification_hook(int owner
, modification_hook
*call_back
);
187 void add_modification_hook_late(int owner
, modification_hook
*call_back
);
188 struct smatch_state
*get_modification_state(struct expression
*expr
);
190 int outside_of_function(void);
191 const char *get_filename(void);
192 const char *get_base_file(void);
193 char *get_function(void);
194 int get_lineno(void);
195 extern int final_pass
;
196 extern struct symbol
*cur_func_sym
;
197 extern int option_debug
;
198 extern int local_debug
;
199 extern int option_info
;
200 extern int option_spammy
;
201 extern char *trace_variable
;
202 extern struct stree
*global_states
;
203 int is_silenced_function(void);
205 /* smatch_impossible.c */
206 int is_impossible_path(void);
207 void set_path_impossible(void);
209 extern FILE *sm_outfd
;
210 extern FILE *sql_outfd
;
211 extern FILE *caller_info_fd
;
212 #define sm_printf(msg...) do { if (final_pass || option_debug || local_debug) fprintf(sm_outfd, msg); } while (0)
214 static inline void sm_prefix(void)
216 sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
219 static inline void print_implied_debug_msg();
221 #define sm_msg(msg...) \
223 print_implied_debug_msg(); \
224 if (!option_debug && !final_pass && !local_debug) \
226 if (!option_info && is_silenced_function()) \
233 #define local_debug(msg...) \
239 extern char *implied_debug_msg
;
240 static inline void print_implied_debug_msg(void)
242 static struct symbol
*last_printed
= NULL
;
244 if (!implied_debug_msg
)
246 if (last_printed
== cur_func_sym
)
248 last_printed
= cur_func_sym
;
249 sm_msg("%s", implied_debug_msg
);
252 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
254 #define sm_info(msg...) do { \
255 if (option_debug || (option_info && final_pass)) { \
257 sm_printf("info: "); \
263 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
265 struct smatch_state
*__get_state(int owner
, const char *name
, struct symbol
*sym
);
266 struct smatch_state
*get_state(int owner
, const char *name
, struct symbol
*sym
);
267 struct smatch_state
*get_state_expr(int owner
, struct expression
*expr
);
268 struct state_list
*get_possible_states(int owner
, const char *name
,
270 struct state_list
*get_possible_states_expr(int owner
, struct expression
*expr
);
271 struct sm_state
*set_state(int owner
, const char *name
, struct symbol
*sym
,
272 struct smatch_state
*state
);
273 struct sm_state
*set_state_expr(int owner
, struct expression
*expr
,
274 struct smatch_state
*state
);
275 void delete_state(int owner
, const char *name
, struct symbol
*sym
);
276 void delete_state_expr(int owner
, struct expression
*expr
);
277 void __delete_all_states_sym(struct symbol
*sym
);
278 void set_true_false_states(int owner
, const char *name
, struct symbol
*sym
,
279 struct smatch_state
*true_state
,
280 struct smatch_state
*false_state
);
281 void set_true_false_states_expr(int owner
, struct expression
*expr
,
282 struct smatch_state
*true_state
,
283 struct smatch_state
*false_state
);
285 struct stree
*get_all_states_from_stree(int owner
, struct stree
*source
);
286 struct stree
*get_all_states_stree(int id
);
287 struct stree
*__get_cur_stree(void);
288 int is_reachable(void);
289 void add_get_state_hook(void (*fn
)(int owner
, const char *name
, struct symbol
*sym
));
291 /* smatch_helper.c */
292 DECLARE_PTR_LIST(int_stack
, int);
293 char *alloc_string(const char *str
);
294 void free_string(char *str
);
295 void append(char *dest
, const char *data
, int buff_len
);
296 void remove_parens(char *str
);
297 struct smatch_state
*alloc_state_num(int num
);
298 struct smatch_state
*alloc_state_str(const char *name
);
299 struct smatch_state
*alloc_state_expr(struct expression
*expr
);
300 struct expression
*get_argument_from_call_expr(struct expression_list
*args
,
303 char *expr_to_var(struct expression
*expr
);
304 struct symbol
*expr_to_sym(struct expression
*expr
);
305 char *expr_to_str(struct expression
*expr
);
306 char *expr_to_str_sym(struct expression
*expr
,
307 struct symbol
**sym_ptr
);
308 char *expr_to_var_sym(struct expression
*expr
,
309 struct symbol
**sym_ptr
);
310 char *expr_to_known_chunk_sym(struct expression
*expr
, struct symbol
**sym
);
311 char *expr_to_chunk_sym_vsl(struct expression
*expr
, struct symbol
**sym
, struct var_sym_list
**vsl
);
312 int get_complication_score(struct expression
*expr
);
314 int sym_name_is(const char *name
, struct expression
*expr
);
315 int get_const_value(struct expression
*expr
, sval_t
*sval
);
316 int get_value(struct expression
*expr
, sval_t
*val
);
317 int get_implied_value(struct expression
*expr
, sval_t
*val
);
318 int get_implied_min(struct expression
*expr
, sval_t
*sval
);
319 int get_implied_max(struct expression
*expr
, sval_t
*val
);
320 int get_hard_max(struct expression
*expr
, sval_t
*sval
);
321 int get_fuzzy_min(struct expression
*expr
, sval_t
*min
);
322 int get_fuzzy_max(struct expression
*expr
, sval_t
*max
);
323 int get_absolute_min(struct expression
*expr
, sval_t
*sval
);
324 int get_absolute_max(struct expression
*expr
, sval_t
*sval
);
325 int parse_call_math(struct expression
*expr
, char *math
, sval_t
*val
);
326 int parse_call_math_rl(struct expression
*call
, char *math
, struct range_list
**rl
);
327 char *get_value_in_terms_of_parameter_math(struct expression
*expr
);
328 char *get_value_in_terms_of_parameter_math_var_sym(const char *var
, struct symbol
*sym
);
329 int is_zero(struct expression
*expr
);
330 int known_condition_true(struct expression
*expr
);
331 int known_condition_false(struct expression
*expr
);
332 int implied_condition_true(struct expression
*expr
);
333 int implied_condition_false(struct expression
*expr
);
334 int can_integer_overflow(struct symbol
*type
, struct expression
*expr
);
336 int is_array(struct expression
*expr
);
337 struct expression
*get_array_base(struct expression
*expr
);
338 struct expression
*get_array_offset(struct expression
*expr
);
339 const char *show_state(struct smatch_state
*state
);
340 struct statement
*get_expression_statement(struct expression
*expr
);
341 struct expression
*strip_parens(struct expression
*expr
);
342 struct expression
*strip_expr(struct expression
*expr
);
343 void scoped_state(int my_id
, const char *name
, struct symbol
*sym
);
344 int is_error_return(struct expression
*expr
);
345 int getting_address(void);
346 int get_struct_and_member(struct expression
*expr
, const char **type
, const char **member
);
347 char *get_member_name(struct expression
*expr
);
348 char *get_fnptr_name(struct expression
*expr
);
349 int cmp_pos(struct position pos1
, struct position pos2
);
350 int positions_eq(struct position pos1
, struct position pos2
);
351 struct statement
*get_current_statement(void);
352 struct statement
*get_prev_statement(void);
353 int get_param_num_from_sym(struct symbol
*sym
);
354 int get_param_num(struct expression
*expr
);
355 int ms_since(struct timeval
*start
);
356 int parent_is_gone_var_sym(const char *name
, struct symbol
*sym
);
357 int parent_is_gone(struct expression
*expr
);
358 int invert_op(int op
);
359 int expr_equiv(struct expression
*one
, struct expression
*two
);
360 void push_int(struct int_stack
**stack
, int num
);
361 int pop_int(struct int_stack
**stack
);
364 struct symbol
*get_real_base_type(struct symbol
*sym
);
365 int type_bytes(struct symbol
*type
);
366 int array_bytes(struct symbol
*type
);
367 struct symbol
*get_pointer_type(struct expression
*expr
);
368 struct symbol
*get_type(struct expression
*expr
);
369 int type_signed(struct symbol
*base_type
);
370 int expr_unsigned(struct expression
*expr
);
371 int expr_signed(struct expression
*expr
);
372 int returns_unsigned(struct symbol
*base_type
);
373 int is_pointer(struct expression
*expr
);
374 int returns_pointer(struct symbol
*base_type
);
375 sval_t
sval_type_max(struct symbol
*base_type
);
376 sval_t
sval_type_min(struct symbol
*base_type
);
377 int nr_bits(struct expression
*expr
);
378 int is_void_pointer(struct expression
*expr
);
379 int is_char_pointer(struct expression
*expr
);
380 int is_string(struct expression
*expr
);
381 int is_static(struct expression
*expr
);
382 int is_local_variable(struct expression
*expr
);
383 int types_equiv(struct symbol
*one
, struct symbol
*two
);
385 const char *global_static();
386 struct symbol
*cur_func_return_type(void);
387 struct symbol
*get_arg_type(struct expression
*fn
, int arg
);
388 struct symbol
*get_member_type_from_key(struct expression
*expr
, const char *key
);
389 int is_struct(struct expression
*expr
);
390 char *type_to_str(struct symbol
*type
);
392 /* smatch_ignore.c */
393 void add_ignore(int owner
, const char *name
, struct symbol
*sym
);
394 int is_ignored(int owner
, const char *name
, struct symbol
*sym
);
395 void add_ignore_expr(int owner
, struct expression
*expr
);
396 int is_ignored_expr(int owner
, struct expression
*expr
);
399 struct var_sym
*alloc_var_sym(const char *var
, struct symbol
*sym
);
400 struct var_sym_list
*expr_to_vsl(struct expression
*expr
);
401 void add_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
402 void add_var_sym_expr(struct var_sym_list
**list
, struct expression
*expr
);
403 void del_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
404 int in_var_sym_list(struct var_sym_list
*list
, const char *var
, struct symbol
*sym
);
405 struct var_sym_list
*clone_var_sym_list(struct var_sym_list
*from_vsl
);
406 void merge_var_sym_list(struct var_sym_list
**dest
, struct var_sym_list
*src
);
407 struct var_sym_list
*combine_var_sym_lists(struct var_sym_list
*one
, struct var_sym_list
*two
);
408 int var_sym_lists_equiv(struct var_sym_list
*one
, struct var_sym_list
*two
);
409 void free_var_sym_list(struct var_sym_list
**list
);
410 void free_var_syms_and_list(struct var_sym_list
**list
);
413 struct tracker
*alloc_tracker(int owner
, const char *name
, struct symbol
*sym
);
414 void add_tracker(struct tracker_list
**list
, int owner
, const char *name
,
416 void add_tracker_expr(struct tracker_list
**list
, int owner
, struct expression
*expr
);
417 void del_tracker(struct tracker_list
**list
, int owner
, const char *name
,
419 int in_tracker_list(struct tracker_list
*list
, int owner
, const char *name
,
421 void free_tracker_list(struct tracker_list
**list
);
422 void free_trackers_and_list(struct tracker_list
**list
);
424 /* smatch_conditions */
425 int in_condition(void);
429 extern int __in_fake_assign
;
430 void smatch (int argc
, char **argv
);
431 int inside_loop(void);
432 int definitely_inside_loop(void);
433 struct expression
*get_switch_expr(void);
434 int in_expression_statement(void);
435 void __process_post_op_stack(void);
436 void __split_expr(struct expression
*expr
);
437 void __split_label_stmt(struct statement
*stmt
);
438 void __split_stmt(struct statement
*stmt
);
439 extern int __in_function_def
;
440 extern int option_assume_loops
;
441 extern int option_two_passes
;
442 extern int option_no_db
;
443 extern int option_file_output
;
444 extern int option_time
;
445 extern struct expression_list
*big_expression_stack
;
446 extern struct expression_list
*big_condition_stack
;
447 extern struct statement_list
*big_statement_stack
;
448 int is_assigned_call(struct expression
*expr
);
449 int inlinable(struct expression
*expr
);
450 extern int __inline_call
;
451 extern struct expression
*__inline_fn
;
452 extern int __in_pre_condition
;
453 extern int __bail_on_rest_of_function
;
454 extern struct statement
*__prev_stmt
;
455 extern struct statement
*__cur_stmt
;
456 extern struct statement
*__next_stmt
;
457 void init_fake_env(void);
458 void end_fake_env(void);
459 int time_parsing_function(void);
461 /* smatch_struct_assignment.c */
462 struct expression
*get_faked_expression(void);
463 void __fake_struct_member_assignments(struct expression
*expr
);
465 /* smatch_project.c */
466 int is_no_inline_function(const char *function
);
468 /* smatch_conditions */
469 void __split_whole_condition(struct expression
*expr
);
470 void __handle_logic(struct expression
*expr
);
471 int is_condition(struct expression
*expr
);
472 int __handle_condition_assigns(struct expression
*expr
);
473 int __handle_select_assigns(struct expression
*expr
);
474 int __handle_expr_statement_assigns(struct expression
*expr
);
476 /* smatch_implied.c */
477 extern int option_debug_implied
;
478 extern int option_debug_related
;
479 struct range_list_stack
;
480 void param_limit_implications(struct expression
*expr
, int param
, char *key
, char *value
);
481 struct stree
*__implied_case_stree(struct expression
*switch_expr
,
482 struct range_list
*case_rl
,
483 struct range_list_stack
**remaining_cases
,
484 struct stree
**raw_stree
);
485 void overwrite_states_using_pool(struct sm_state
*gate_sm
, struct sm_state
*pool_sm
);
486 int assume(struct expression
*expr
);
487 void end_assume(void);
489 /* smatch_extras.c */
490 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */
491 extern int RETURN_ID
;
498 extern long long valid_ptr_min
, valid_ptr_max
;
499 extern sval_t valid_ptr_min_sval
, valid_ptr_max_sval
;
500 static const sval_t array_min_sval
= {
504 static const sval_t array_max_sval
= {
508 static const sval_t text_seg_min
= {
510 {.value
= 100000000},
512 static const sval_t text_seg_max
= {
514 {.value
= 177777777},
516 static const sval_t data_seg_min
= {
518 {.value
= 200000000},
520 static const sval_t data_seg_max
= {
522 {.value
= 277777777},
524 static const sval_t bss_seg_min
= {
526 {.value
= 300000000},
528 static const sval_t bss_seg_max
= {
530 {.value
= 377777777},
532 static const sval_t stack_seg_min
= {
534 {.value
= 400000000},
536 static const sval_t stack_seg_max
= {
538 {.value
= 477777777},
540 static const sval_t kmalloc_seg_min
= {
542 {.value
= 500000000},
544 static const sval_t kmalloc_seg_max
= {
546 {.value
= 577777777},
548 static const sval_t vmalloc_seg_min
= {
550 {.value
= 600000000},
552 static const sval_t vmalloc_seg_max
= {
554 {.value
= 677777777},
556 static const sval_t fn_ptr_min
= {
558 {.value
= 700000000},
560 static const sval_t fn_ptr_max
= {
562 {.value
= 777777777},
565 char *get_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
566 char *map_call_to_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
567 char *map_long_to_short_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
568 char *map_long_to_short_name_sym_nostack(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
570 #define STRLEN_MAX_RET 1010101
572 /* smatch_absolute.c */
573 int get_absolute_min_helper(struct expression
*expr
, sval_t
*sval
);
574 int get_absolute_max_helper(struct expression
*expr
, sval_t
*sval
);
576 /* smatch_local_values.c */
577 int get_local_rl(struct expression
*expr
, struct range_list
**rl
);
578 int get_local_max_helper(struct expression
*expr
, sval_t
*sval
);
579 int get_local_min_helper(struct expression
*expr
, sval_t
*sval
);
581 /* smatch_type_value.c */
582 int get_db_type_rl(struct expression
*expr
, struct range_list
**rl
);
583 /* smatch_data_val.c */
584 int get_db_data_rl(struct expression
*expr
, struct range_list
**rl
);
586 /* smatch_states.c */
587 void __swap_cur_stree(struct stree
*stree
);
588 void __push_fake_cur_stree();
589 struct stree
*__pop_fake_cur_stree();
590 void __free_fake_cur_stree();
591 void __set_fake_cur_stree_fast(struct stree
*stree
);
592 void __pop_fake_cur_stree_fast(void);
593 void __merge_stree_into_cur(struct stree
*stree
);
595 int unreachable(void);
596 void __set_sm(struct sm_state
*sm
);
597 void __set_sm_cur_stree(struct sm_state
*sm
);
598 void __set_sm_fake_stree(struct sm_state
*sm
);
599 void __set_true_false_sm(struct sm_state
*true_state
,
600 struct sm_state
*false_state
);
601 void nullify_path(void);
602 void __match_nullify_path_hook(const char *fn
, struct expression
*expr
,
604 void __unnullify_path(void);
605 int __path_is_null(void);
606 void save_all_states(void);
607 void restore_all_states(void);
608 void free_goto_stack(void);
609 void clear_all_states(void);
611 struct sm_state
*get_sm_state(int owner
, const char *name
,
613 struct sm_state
*get_sm_state_expr(int owner
, struct expression
*expr
);
614 void __push_true_states(void);
615 void __use_false_states(void);
616 void __discard_false_states(void);
617 void __merge_false_states(void);
618 void __merge_true_states(void);
620 void __negate_cond_stacks(void);
621 void __use_pre_cond_states(void);
622 void __use_cond_true_states(void);
623 void __use_cond_false_states(void);
624 void __push_cond_stacks(void);
625 void __fold_in_set_states(void);
626 void __free_set_states(void);
627 struct stree
*__copy_cond_true_states(void);
628 struct stree
*__copy_cond_false_states(void);
629 struct stree
*__pop_cond_true_stack(void);
630 struct stree
*__pop_cond_false_stack(void);
631 void __and_cond_states(void);
632 void __or_cond_states(void);
633 void __save_pre_cond_states(void);
634 void __discard_pre_cond_states(void);
635 struct stree
*__get_true_states(void);
636 struct stree
*__get_false_states(void);
637 void __use_cond_states(void);
638 extern struct state_list
*__last_base_slist
;
640 void __push_continues(void);
641 void __discard_continues(void);
642 void __process_continues(void);
643 void __merge_continues(void);
645 void __push_breaks(void);
646 void __process_breaks(void);
647 int __has_breaks(void);
648 void __merge_breaks(void);
649 void __use_breaks(void);
651 void __save_switch_states(struct expression
*switch_expr
);
652 void __discard_switches(void);
653 void __merge_switches(struct expression
*switch_expr
, struct range_list
*case_rl
);
654 void __push_default(void);
655 void __set_default(void);
656 int __pop_default(void);
658 void __push_conditions(void);
659 void __discard_conditions(void);
661 void __save_gotos(const char *name
, struct symbol
*sym
);
662 void __merge_gotos(const char *name
, struct symbol
*sym
);
664 void __print_cur_stree(void);
667 void __pass_to_client(void *data
, enum hook_type type
);
668 void __pass_to_client_no_data(enum hook_type type
);
669 void __pass_case_to_client(struct expression
*switch_expr
,
670 struct range_list
*rl
);
671 int __has_merge_function(int client_id
);
672 struct smatch_state
*__client_merge_function(int owner
,
673 struct smatch_state
*s1
,
674 struct smatch_state
*s2
);
675 struct smatch_state
*__client_unmatched_state_function(struct sm_state
*sm
);
676 void call_pre_merge_hook(struct sm_state
*sm
);
677 void __push_scope_hooks(void);
678 void __call_scope_hooks(void);
680 /* smatch_function_hooks.c */
681 void create_function_hook_hash(void);
682 void __match_initializer_call(struct symbol
*sym
);
688 * Changing these numbers is a pain. Don't do it. If you ever use a
689 * number it can't be re-used right away so there may be gaps.
690 * We select these in order by type so if the order matters, then give
691 * it a number below 100-999,9000-9999 ranges. */
705 LOCK_RELEASED
= 1009,
706 ABSOLUTE_LIMITS
= 1010,
718 UNTRACKED_PARAM
= 1023,
723 COMPARE_LIMIT
= 1028,
724 PARAM_COMPARE
= 1029,
727 CONSTRAINT_REQUIRED
= 1033,
729 /* put random temporary stuff in the 7000-7999 range for testing */
731 USER_DATA3_SET
= 9017,
733 NO_OVERFLOW_SIMPLE
= 8019,
739 NO_SIDE_EFFECT
= 8025,
742 ARRAYSIZE_ARG
= 8033,
748 void debug_sql(const char *sql
);
749 void debug_mem_sql(const char *sql
);
750 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
);
751 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
));
752 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
));
753 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
));
754 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
755 struct range_list
*db_return_vals(struct expression
*expr
);
756 struct range_list
*db_return_vals_from_str(const char *fn_name
);
757 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
);
758 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
);
759 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
);
760 const char *state_name_to_param_name(const char *state_name
, const char *param_name
);
761 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
);
762 const char *get_param_name(struct sm_state
*sm
);
763 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
);
764 const char *get_mtag_name_expr(struct expression
*expr
);
765 char *get_data_info_name(struct expression
*expr
);
767 #define run_sql(call_back, data, sql...) \
769 char sql_txt[1024]; \
772 snprintf(sql_txt, 1024, sql); \
773 debug_sql(sql_txt); \
774 sql_exec(call_back, data, sql_txt); \
777 /* like run_sql() but for the in-memory database */
778 #define mem_sql(call_back, data, sql...) \
780 char sql_txt[1024]; \
782 snprintf(sql_txt, sizeof(sql_txt), sql); \
783 sm_debug("in-mem: %s\n", sql_txt); \
784 debug_mem_sql(sql_txt); \
785 sql_mem_exec(call_back, data, sql_txt); \
788 char *get_static_filter(struct symbol
*sym
);
790 void sql_insert_return_states(int return_id
, const char *return_ranges
,
791 int type
, int param
, const char *key
, const char *value
);
792 void sql_insert_caller_info(struct expression
*call
, int type
, int param
,
793 const char *key
, const char *value
);
794 void sql_insert_function_ptr(const char *fn
, const char *struct_name
);
795 void sql_insert_return_values(const char *return_values
);
796 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
);
797 void sql_insert_function_type_size(const char *member
, const char *ranges
);
798 void sql_insert_local_values(const char *name
, const char *value
);
799 void sql_insert_function_type_value(const char *type
, const char *value
);
800 void sql_insert_function_type(int param
, const char *value
);
801 void sql_insert_parameter_name(int param
, const char *value
);
802 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
);
803 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
);
804 void sql_save_constraint(const char *con
);
805 void sql_save_constraint_required(const char *data
, int op
, const char *limit
);
806 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
);
807 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
);
808 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
);
809 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
);
810 void insert_mtag_data(mtag_t tag
, const char *data_name
, int offset
, struct range_list
*rl
);
811 void sql_insert_mtag_map(mtag_t tag
, int offset
, mtag_t container
);
812 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
);
813 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
);
815 void sql_select_return_states(const char *cols
, struct expression
*call
,
816 int (*callback
)(void*, int, char**, char**), void *info
);
817 void sql_select_call_implies(const char *cols
, struct expression
*call
,
818 int (*callback
)(void*, int, char**, char**));
820 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
);
821 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
);
823 void open_smatch_db(void);
826 int open_data_file(const char *filename
);
827 struct token
*get_tokens_file(const char *filename
);
830 extern char *option_debug_check
;
831 extern char *option_project_str
;
832 extern char *data_dir
;
833 extern int option_no_data
;
834 extern int option_full_path
;
835 extern int option_param_mapper
;
836 extern int option_call_tree
;
837 extern int num_checks
;
845 extern enum project_type option_project
;
846 const char *check_name(unsigned short id
);
847 int id_from_name(const char *name
);
850 /* smatch_buf_size.c */
851 int get_array_size(struct expression
*expr
);
852 int get_array_size_bytes(struct expression
*expr
);
853 int get_array_size_bytes_min(struct expression
*expr
);
854 int get_array_size_bytes_max(struct expression
*expr
);
855 struct range_list
*get_array_size_bytes_rl(struct expression
*expr
);
856 int get_real_array_size(struct expression
*expr
);
857 int last_member_is_resizable(struct symbol
*type
);
858 /* smatch_strlen.c */
859 int get_implied_strlen(struct expression
*expr
, struct range_list
**rl
);
860 int get_size_from_strlen(struct expression
*expr
);
862 /* smatch_capped.c */
863 int is_capped(struct expression
*expr
);
864 int is_capped_var_sym(const char *name
, struct symbol
*sym
);
866 /* check_user_data.c */
867 int is_user_macro(struct expression
*expr
);
868 int is_user_data(struct expression
*expr
);
869 int is_capped_user_data(struct expression
*expr
);
870 int implied_user_data(struct expression
*expr
, struct range_list
**rl
);
871 int get_user_rl(struct expression
*expr
, struct range_list
**rl
);
872 int get_user_rl_var_sym(const char *name
, struct symbol
*sym
, struct range_list
**rl
);
874 /* check_locking.c */
875 void print_held_locks();
877 /* check_assigned_expr.c */
878 struct expression
*get_assigned_expr(struct expression
*expr
);
879 struct expression
*get_assigned_expr_name_sym(const char *name
, struct symbol
*sym
);
880 /* smatch_return_to_param.c */
881 void __add_return_to_param_mapping(struct expression
*assign
, const char *return_string
);
882 char *map_call_to_param_name_sym(struct expression
*expr
, struct symbol
**sym
);
884 /* smatch_comparison.c */
885 struct compare_data
{
886 /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
887 struct expression
*left
;
888 const char *left_var
;
889 struct var_sym_list
*left_vsl
;
891 struct expression
*right
;
892 const char *right_var
;
893 struct var_sym_list
*right_vsl
;
895 DECLARE_ALLOCATOR(compare_data
);
896 struct smatch_state
*alloc_compare_state(
897 struct expression
*left
,
898 const char *left_var
, struct var_sym_list
*left_vsl
,
900 struct expression
*right
,
901 const char *right_var
, struct var_sym_list
*right_vsl
);
902 int merge_comparisons(int one
, int two
);
903 int combine_comparisons(int left_compare
, int right_compare
);
904 int state_to_comparison(struct smatch_state
*state
);
905 struct smatch_state
*merge_compare_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
906 int get_comparison(struct expression
*left
, struct expression
*right
);
907 int get_comparison_strings(const char *one
, const char *two
);
908 int possible_comparison(struct expression
*a
, int comparison
, struct expression
*b
);
909 struct state_list
*get_all_comparisons(struct expression
*expr
);
910 struct state_list
*get_all_possible_equal_comparisons(struct expression
*expr
);
911 void __add_return_comparison(struct expression
*call
, const char *range
);
912 void __add_comparison_info(struct expression
*expr
, struct expression
*call
, const char *range
);
913 char *get_printed_param_name(struct expression
*call
, const char *param_name
, struct symbol
*param_sym
);
914 char *name_sym_to_param_comparison(const char *name
, struct symbol
*sym
);
915 char *expr_equal_to_param(struct expression
*expr
, int ignore
);
916 char *expr_lte_to_param(struct expression
*expr
, int ignore
);
917 char *expr_param_comparison(struct expression
*expr
, int ignore
);
918 int flip_comparison(int op
);
919 int negate_comparison(int op
);
920 int remove_unsigned_from_comparison(int op
);
921 int param_compare_limit_is_impossible(struct expression
*expr
, int left_param
, char *left_key
, char *value
);
922 void filter_by_comparison(struct range_list
**rl
, int comparison
, struct range_list
*right
);
923 struct sm_state
*comparison_implication_hook(struct expression
*expr
,
924 struct state_list
**true_stack
,
925 struct state_list
**false_stack
);
926 void __compare_param_limit_hook(struct expression
*left_expr
, struct expression
*right_expr
,
927 const char *state_name
,
928 struct smatch_state
*true_state
, struct smatch_state
*false_state
);
932 sval_t
*sval_alloc(sval_t sval
);
933 sval_t
*sval_alloc_permanent(sval_t sval
);
934 sval_t
sval_blank(struct expression
*expr
);
935 sval_t
sval_type_val(struct symbol
*type
, long long val
);
936 sval_t
sval_from_val(struct expression
*expr
, long long val
);
937 int sval_unsigned(sval_t sval
);
938 int sval_signed(sval_t sval
);
939 int sval_bits(sval_t sval
);
940 int sval_bits_used(sval_t sval
);
941 int sval_is_negative(sval_t sval
);
942 int sval_is_positive(sval_t sval
);
943 int sval_is_min(sval_t sval
);
944 int sval_is_max(sval_t sval
);
945 int sval_is_a_min(sval_t sval
);
946 int sval_is_a_max(sval_t sval
);
947 int sval_is_negative_min(sval_t sval
);
948 int sval_cmp_t(struct symbol
*type
, sval_t one
, sval_t two
);
949 int sval_cmp_val(sval_t one
, long long val
);
950 sval_t
sval_min(sval_t one
, sval_t two
);
951 sval_t
sval_max(sval_t one
, sval_t two
);
952 int sval_too_low(struct symbol
*type
, sval_t sval
);
953 int sval_too_high(struct symbol
*type
, sval_t sval
);
954 int sval_fits(struct symbol
*type
, sval_t sval
);
955 sval_t
sval_cast(struct symbol
*type
, sval_t sval
);
956 sval_t
sval_preop(sval_t sval
, int op
);
957 sval_t
sval_binop(sval_t left
, int op
, sval_t right
);
958 int sval_binop_overflows(sval_t left
, int op
, sval_t right
);
959 unsigned long long fls_mask(unsigned long long uvalue
);
960 unsigned long long sval_fls_mask(sval_t sval
);
961 const char *sval_to_str(sval_t sval
);
962 const char *sval_to_numstr(sval_t sval
);
963 sval_t
ll_to_sval(long long val
);
965 /* smatch_string_list.c */
966 int list_has_string(struct string_list
*str_list
, const char *str
);
967 void insert_string(struct string_list
**str_list
, const char *str
);
968 struct string_list
*clone_str_list(struct string_list
*orig
);
969 struct string_list
*combine_string_lists(struct string_list
*one
, struct string_list
*two
);
971 /* smatch_start_states.c */
972 struct stree
*get_start_states(void);
974 /* smatch_recurse.c */
975 int has_symbol(struct expression
*expr
, struct symbol
*sym
);
976 int has_variable(struct expression
*expr
, struct expression
*var
);
977 int has_inc_dec(struct expression
*expr
);
979 /* smatch_stored_conditions.c */
980 struct smatch_state
*get_stored_condition(struct expression
*expr
);
981 struct expression_list
*get_conditions(struct expression
*expr
);
982 struct sm_state
*stored_condition_implication_hook(struct expression
*expr
,
983 struct state_list
**true_stack
,
984 struct state_list
**false_stack
);
986 /* check_string_len.c */
987 int get_formatted_string_size(struct expression
*call
, int arg
);
989 /* smatch_param_set.c */
990 int param_was_set(struct expression
*expr
);
991 int param_was_set_var_sym(const char *name
, struct symbol
*sym
);
992 /* smatch_param_filter.c */
993 int param_has_filter_data(struct sm_state
*sm
);
996 void set_up_link_functions(int id
, int linkid
);
997 struct smatch_state
*merge_link_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
998 void store_link(int link_id
, const char *name
, struct symbol
*sym
, const char *link_name
, struct symbol
*link_sym
);
1000 /* smatch_auto_copy.c */
1001 void set_auto_copy(int owner
);
1003 /* check_buf_comparison */
1004 struct expression
*get_size_variable(struct expression
*buf
);
1005 struct expression
*get_array_variable(struct expression
*size
);
1007 /* smatch_untracked_param.c */
1008 void mark_untracked(struct expression
*expr
, int param
, const char *key
, const char *value
);
1009 void add_untracked_param_hook(void (func
)(struct expression
*call
, int param
));
1011 /* smatch_strings.c */
1012 struct state_list
*get_strings(struct expression
*expr
);
1014 /* smatch_estate.c */
1015 int estate_get_single_value(struct smatch_state
*state
, sval_t
*sval
);
1017 /* smatch_address.c */
1018 int get_address_rl(struct expression
*expr
, struct range_list
**rl
);
1019 int get_member_offset(struct symbol
*type
, const char *member_name
);
1020 int get_member_offset_from_deref(struct expression
*expr
);
1022 /* for now this is in smatch_used_parameter.c */
1023 void __get_state_hook(int owner
, const char *name
, struct symbol
*sym
);
1025 /* smatch_buf_comparison.c */
1026 int db_var_is_array_limit(struct expression
*array
, const char *name
, struct var_sym_list
*vsl
);
1028 struct stree
*get_all_return_states(void);
1029 struct stree_stack
*get_all_return_strees(void);
1030 int on_atomic_dec_path(void);
1031 int was_inced(const char *name
, struct symbol
*sym
);
1033 /* smatch_constraints.c */
1034 char *get_constraint_str(struct expression
*expr
);
1035 struct constraint_list
*get_constraints(struct expression
*expr
);
1036 char *unmet_constraint(struct expression
*data
, struct expression
*offset
);
1037 char *get_required_constraint(const char *data_str
);
1039 /* smatch_container_of.c */
1040 int get_param_from_container_of(struct expression
*expr
);
1041 int get_offset_from_container_of(struct expression
*expr
);
1044 int get_toplevel_mtag(struct symbol
*sym
, mtag_t
*tag
);
1045 int get_mtag(struct expression
*expr
, mtag_t
*tag
);
1046 int create_mtag_alias(mtag_t tag
, struct expression
*expr
, mtag_t
*new);
1047 int expr_to_mtag_name_offset(struct expression
*expr
, mtag_t
*tag
, char **name
, int *offset
);
1049 static inline int type_bits(struct symbol
*type
)
1053 if (type
->type
== SYM_PTR
) /* Sparse doesn't set this for &pointers */
1054 return bits_in_pointer
;
1055 if (type
->type
== SYM_ARRAY
)
1056 return bits_in_pointer
;
1057 if (!type
->examined
)
1058 examine_symbol_type(type
);
1059 return type
->bit_size
;
1062 static inline int type_unsigned(struct symbol
*base_type
)
1066 if (base_type
->ctype
.modifiers
& MOD_UNSIGNED
)
1071 static inline int type_positive_bits(struct symbol
*type
)
1075 if (type
->type
== SYM_ARRAY
)
1076 return bits_in_pointer
- 1;
1077 if (type_unsigned(type
))
1078 return type_bits(type
);
1079 return type_bits(type
) - 1;
1082 static inline int sval_positive_bits(sval_t sval
)
1084 return type_positive_bits(sval
.type
);
1088 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1090 static inline int sval_cmp(sval_t one
, sval_t two
)
1092 struct symbol
*type
;
1095 if (sval_positive_bits(two
) > sval_positive_bits(one
))
1097 if (type_bits(type
) < 31)
1100 one
= sval_cast(type
, one
);
1101 two
= sval_cast(type
, two
);
1103 if (type_unsigned(type
)) {
1104 if (one
.uvalue
< two
.uvalue
)
1106 if (one
.uvalue
== two
.uvalue
)
1110 /* fix me handle type promotion and unsigned values */
1111 if (one
.value
< two
.value
)
1113 if (one
.value
== two
.value
)
1118 #endif /* !SMATCH_H_ */