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
31 #include "expression.h"
33 #include "smatch_constants.h"
35 typedef long long mtag_t
;
41 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
42 #define GLOBAL_STATE(_x) struct smatch_state _x = { .name = #_x }
43 extern struct smatch_state undefined
;
44 extern struct smatch_state merged
;
45 extern struct smatch_state true_state
;
46 extern struct smatch_state false_state
;
47 extern struct smatch_state unit_bit
;
48 extern struct smatch_state unit_byte
;
49 extern struct smatch_state unit_array_size
;
50 extern struct smatch_state unit_long
;
51 extern struct smatch_state unit_page
;
52 extern struct smatch_state unit_msec
;
53 extern struct smatch_state unit_ns
;
54 extern struct smatch_state unit_jiffy
;
55 DECLARE_ALLOCATOR(smatch_state
);
57 static inline void *INT_PTR(int i
)
59 return (void *)(long)i
;
62 static inline int PTR_INT(void *p
)
72 DECLARE_ALLOCATOR(tracker
);
73 DECLARE_PTR_LIST(tracker_list
, struct tracker
);
74 DECLARE_PTR_LIST(stree_stack
, struct stree
);
76 /* The first 3 struct members must match struct tracker */
81 unsigned short merged
:1;
82 unsigned short leaf
:1;
84 struct smatch_state
*state
;
86 struct sm_state
*left
;
87 struct sm_state
*right
;
88 struct state_list
*possible
;
95 DECLARE_ALLOCATOR(var_sym
);
96 DECLARE_PTR_LIST(var_sym_list
, struct var_sym
);
102 DECLARE_PTR_LIST(constraint_list
, struct constraint
);
108 extern struct alloc_info
*alloc_funcs
;
111 unsigned long long set
;
112 unsigned long long possible
;
123 DECLARATION_HOOK_AFTER
,
125 ASSIGNMENT_HOOK_AFTER
,
127 GLOBAL_ASSIGNMENT_HOOK
,
132 AFTER_LOOP_NO_BREAKS
,
134 WHOLE_CONDITION_HOOK
,
135 FUNCTION_CALL_HOOK_BEFORE
,
137 CALL_HOOK_AFTER_INLINE
,
138 FUNCTION_CALL_HOOK_AFTER_DB
,
139 CALL_ASSIGNMENT_HOOK
,
140 MACRO_ASSIGNMENT_HOOK
,
143 DEREF_HOOK
, /* DEREF_HOOK is junk. Better to use add_dereference_hook() */
165 typedef void (void_fn
)(void);
166 typedef void (expr_func
)(struct expression
*expr
);
167 typedef void (stmt_func
)(struct statement
*stmt
);
168 typedef bool (bool_stmt_func
)(struct statement
*stmt
);
169 typedef void (sym_func
)(struct symbol
*sym
);
170 typedef void (name_sym_hook
)(struct expression
*expr
, const char *name
, struct symbol
*sym
);
171 typedef void (sm_hook
)(struct sm_state
*sm
, struct expression
*mod_expr
);
172 typedef void (string_hook
)(struct expression
*expr
, const char *str
);
173 DECLARE_PTR_LIST(void_fn_list
, void_fn
);
174 DECLARE_PTR_LIST(expr_fn_list
, expr_func
);
175 DECLARE_PTR_LIST(stmt_fn_list
, stmt_func
);
176 DECLARE_PTR_LIST(bool_stmt_fn_list
, bool_stmt_func
);
177 DECLARE_PTR_LIST(sym_fn_list
, sym_func
);
178 DECLARE_PTR_LIST(name_sym_fn_list
, name_sym_hook
);
179 DECLARE_PTR_LIST(string_hook_list
, string_hook
);
180 void call_void_fns(struct void_fn_list
*list
);
181 void call_expr_fns(struct expr_fn_list
*list
, struct expression
*expr
);
182 void call_stmt_fns(struct stmt_fn_list
*list
, struct statement
*stmt
);
183 void call_sym_fns(struct sym_fn_list
*list
, struct symbol
*sym
);
184 void call_name_sym_fns(struct name_sym_fn_list
*list
, struct expression
*expr
, const char *name
, struct symbol
*sym
);
185 void call_string_hooks(struct string_hook_list
*list
, struct expression
*expr
, const char *str
);
187 void add_dereference_hook(expr_func
*fn
);
189 struct allocation_info
{
191 const char *size_str
;
192 struct expression
*total_size
;
193 struct expression
*nr_elems
;
194 struct expression
*elem_size
;
197 bool safe
; /* safe from overflows */
199 typedef void (alloc_hook
)(struct expression
*expr
, const char *name
, struct symbol
*sym
, struct allocation_info
*info
);
200 void add_allocation_hook(alloc_hook
*func
);
202 void add_hook(void *func
, enum hook_type type
);
203 typedef struct smatch_state
*(merge_func_t
)(struct smatch_state
*s1
, struct smatch_state
*s2
);
204 typedef struct smatch_state
*(unmatched_func_t
)(struct sm_state
*state
);
205 void add_merge_hook(int client_id
, merge_func_t
*func
);
206 void add_unmatched_state_hook(int client_id
, unmatched_func_t
*func
);
207 void add_pre_merge_hook(int client_id
, void (*hook
)(struct sm_state
*cur
, struct sm_state
*other
));
208 typedef void (scope_hook
)(void *data
);
209 void add_scope_hook(scope_hook
*hook
, void *data
);
210 void add_return_string_hook(string_hook
*fn
);
211 typedef void (param_key_hook
)(struct expression
*expr
, const char *name
, struct symbol
*sym
, void *data
);
212 typedef void (func_hook
)(const char *fn
, struct expression
*expr
, void *data
);
213 typedef void (implication_hook
)(const char *fn
, struct expression
*call_expr
,
214 struct expression
*assign_expr
, void *data
);
215 typedef void (return_implies_hook
)(struct expression
*call_expr
,
216 int param
, char *key
, char *value
);
217 typedef int (implied_return_hook
)(struct expression
*call_expr
, void *info
, struct range_list
**rl
);
218 void add_function_hook_early(const char *look_for
, func_hook
*call_back
, void *data
);
219 void add_function_hook(const char *look_for
, func_hook
*call_back
, void *data
);
220 void add_function_hook_late(const char *look_for
, func_hook
*call_back
, void *info
);
222 void add_function_assign_hook(const char *look_for
, func_hook
*call_back
,
224 void register_func_hooks_from_file(const char *file
,
225 func_hook
*call_back
, void *info
);
226 void register_assign_hooks_from_file(const char *file
,
227 func_hook
*call_back
, void *info
);
228 void add_implied_return_hook(const char *look_for
,
229 implied_return_hook
*call_back
,
231 void add_macro_assign_hook(const char *look_for
, func_hook
*call_back
,
233 void add_macro_assign_hook_extra(const char *look_for
, func_hook
*call_back
,
235 void return_implies_state(const char *look_for
, long long start
, long long end
,
236 implication_hook
*call_back
, void *info
);
237 void return_implies_state_sval(const char *look_for
, sval_t start
, sval_t end
,
238 implication_hook
*call_back
, void *info
);
239 void return_implies_exact(const char *look_for
, sval_t start
, sval_t end
,
240 implication_hook
*call_back
, void *info
);
241 struct range_list
*get_range_implications(const char *fn
);
242 void select_return_states_hook(int type
, return_implies_hook
*callback
);
243 void select_return_states_before(void (*fn
)(void));
244 void select_return_states_after(void (*fn
)(void));
245 void add_function_param_key_hook(const char *look_for
, param_key_hook
*call_back
,
246 int param
, const char *key
, void *info
);
247 void add_function_param_key_hook_early(const char *look_for
, param_key_hook
*call_back
,
248 int param
, const char *key
, void *info
);
249 void add_function_param_key_hook_late(const char *look_for
, param_key_hook
*call_back
,
250 int param
, const char *key
, void *info
);
251 void return_implies_param_key(const char *look_for
, sval_t start
, sval_t end
,
252 param_key_hook
*call_back
,
253 int param
, const char *key
, void *info
);
254 void return_implies_param_key_exact(const char *look_for
, sval_t start
, sval_t end
,
255 param_key_hook
*call_back
,
256 int param
, const char *key
, void *info
);
257 void select_return_param_key(int type
, param_key_hook
*callback
);
258 bool get_implied_return(struct expression
*expr
, struct range_list
**rl
);
259 void allocate_hook_memory(void);
260 void allocate_tracker_array(int num_checks
);
262 struct modification_data
{
263 struct smatch_state
*prev
;
264 struct expression
*cur
;
267 void allocate_modification_hooks(void);
268 bool is_sub_member(const char *name
, struct symbol
*sym
, struct sm_state
*sm
);
269 void add_all_modifications_hook(int owner
, name_sym_hook
*hook
);
270 void add_modification_hook(int owner
, sm_hook
*call_back
);
271 void add_modification_hook_late(int owner
, sm_hook
*call_back
);
272 struct smatch_state
*get_modification_state(struct expression
*expr
);
274 int outside_of_function(void);
275 const char *get_filename(void);
276 extern int base_file_stream
;
277 const char *get_base_file(void);
278 unsigned long long get_file_id(void);
279 unsigned long long get_base_file_id(void);
280 char *get_function(void);
281 extern int __smatch_lineno
;
282 int get_lineno(void);
283 extern int final_pass
;
284 extern struct symbol
*cur_func_sym
;
285 extern int option_debug
;
286 extern int local_debug
;
288 extern bool implied_debug
;
289 bool debug_implied(void);
290 bool debug_on(const char *check_name
, const char *var
);
291 extern int option_info
;
292 extern int option_spammy
;
293 extern int option_pedantic
;
294 extern int option_print_names
;
295 extern char *trace_variable
;
296 extern struct stree
*global_states
;
297 void set_function_skipped(void);
298 int is_skipped_function(void);
299 int is_silenced_function(void);
300 extern bool implications_off
;
302 /* smatch_impossible.c */
303 int is_impossible_path(void);
304 void set_true_path_impossible(void);
305 void set_false_path_impossible(void);
306 void set_path_impossible(void);
308 extern FILE *sm_outfd
;
309 extern FILE *sql_outfd
;
310 extern FILE *caller_info_fd
;
311 extern int sm_nr_checks
;
312 extern int sm_nr_errors
;
315 * How to use these routines:
317 * sm_fatal(): an internal error of some kind that should immediately exit
318 * sm_ierror(): an internal error
319 * sm_perror(): an internal error from parsing input source
320 * sm_error(): an error from input source
321 * sm_warning(): a warning from input source
322 * sm_info(): info message (from option_info)
323 * sm_debug(): debug message
324 * sm_msg(): other message (please avoid using this)
327 #define sm_printf(msg...) do { \
328 if (final_pass || option_debug || local_debug || debug_db) \
329 fprintf(sm_outfd, msg); \
332 static inline void sm_prefix(void)
334 sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
335 if (option_info
|| !option_print_names
)
337 sm_printf("[smatch.%s] ", __CHECKNAME__
);
340 static inline void print_implied_debug_msg();
342 extern bool __silence_warnings_for_stmt
;
344 #define sm_print_msg(type, msg...) \
346 print_implied_debug_msg(); \
347 if (!final_pass && !option_debug && !local_debug && !debug_db) \
349 if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
351 if (!option_info && is_silenced_function()) \
355 sm_printf("warn: "); \
357 } else if (type == 2) { \
358 sm_printf("error: "); \
360 } else if (type == 3) { \
361 sm_printf("parse error: "); \
363 } else if (type == 4) { \
364 sm_printf("pedantic: "); \
370 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
372 extern char *implied_debug_msg
;
373 static inline void print_implied_debug_msg(void)
375 static struct symbol
*last_printed
= NULL
;
377 if (!implied_debug_msg
)
379 if (last_printed
== cur_func_sym
)
381 last_printed
= cur_func_sym
;
382 sm_msg("%s", implied_debug_msg
);
385 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
386 #define db_debug(msg...) do { if (option_debug || debug_db) sm_printf(msg); } while (0)
388 #define sm_info(msg...) do { \
389 if (option_debug || (option_info && final_pass)) { \
391 sm_printf("info: "); \
397 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
398 #define sm_warning_line(line, msg...) do { \
399 int __orig = __smatch_lineno; \
400 __smatch_lineno = line; \
401 sm_print_msg(1, msg); \
402 __smatch_lineno = __orig; \
404 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
405 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
406 #define sm_pedantic(msg...) do { if (option_pedantic) sm_print_msg(4, msg); } while (0)
408 static inline void sm_fatal(const char *fmt
, ...)
413 vfprintf(sm_outfd
, fmt
, args
);
416 fprintf(sm_outfd
, "\n");
421 static inline void sm_ierror(const char *fmt
, ...)
427 fprintf(sm_outfd
, "internal error: ");
430 vfprintf(sm_outfd
, fmt
, args
);
433 fprintf(sm_outfd
, "\n");
435 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
437 bool has_states(struct stree
*stree
, int owner
);
438 struct smatch_state
*__get_state(int owner
, const char *name
, struct symbol
*sym
);
439 struct smatch_state
*get_state(int owner
, const char *name
, struct symbol
*sym
);
440 struct smatch_state
*get_state_expr(int owner
, struct expression
*expr
);
441 bool has_possible_state(int owner
, const char *name
, struct symbol
*sym
, struct smatch_state
*state
);
442 bool expr_has_possible_state(int owner
, struct expression
*expr
, struct smatch_state
*state
);
443 struct state_list
*get_possible_states(int owner
, const char *name
,
445 struct state_list
*get_possible_states_expr(int owner
, struct expression
*expr
);
446 struct sm_state
*set_state(int owner
, const char *name
, struct symbol
*sym
,
447 struct smatch_state
*state
);
448 struct sm_state
*set_state_expr(int owner
, struct expression
*expr
,
449 struct smatch_state
*state
);
450 void __delete_state(int owner
, const char *name
, struct symbol
*sym
);
451 void __delete_all_states_sym(struct symbol
*sym
);
452 void set_true_false_states(int owner
, const char *name
, struct symbol
*sym
,
453 struct smatch_state
*true_state
,
454 struct smatch_state
*false_state
);
455 void set_true_false_states_expr(int owner
, struct expression
*expr
,
456 struct smatch_state
*true_state
,
457 struct smatch_state
*false_state
);
459 struct stree
*get_all_states_from_stree(int owner
, struct stree
*source
);
460 struct stree
*get_all_states_stree(int id
);
461 struct stree
*__get_cur_stree(void);
462 int is_reachable(void);
463 void add_get_state_hook(void (*fn
)(int owner
, const char *name
, struct symbol
*sym
));
466 char *ssa_name(const char *name
);
467 void set_ssa_state(int owner
, const char *name
, struct symbol
*sym
, struct smatch_state
*state
);
468 void update_ssa_state(int owner
, const char *name
, struct symbol
*sym
,
469 struct smatch_state
*state
);
470 void update_ssa_sm(int owner
, struct sm_state
*sm
, struct smatch_state
*state
);
471 void set_ssa_state_expr(int owner
, struct expression
*expr
, struct smatch_state
*state
);
472 struct sm_state
*get_ssa_sm_state(int owner
, const char *name
, struct symbol
*sym
);
473 struct sm_state
*get_ssa_sm_state_expr(int owner
, struct expression
*expr
);
474 struct smatch_state
*get_ssa_state(int owner
, const char *name
, struct symbol
*sym
);
475 struct smatch_state
*get_ssa_state_expr(int owner
, struct expression
*expr
);
477 /* smatch_helper.c */
478 DECLARE_PTR_LIST(int_stack
, int);
479 char *alloc_string(const char *str
);
480 char *alloc_string_newline(const char *str
);
481 void free_string(char *str
);
482 void remove_parens(char *str
);
483 struct smatch_state
*alloc_state_num(int num
);
484 struct smatch_state
*alloc_state_str(const char *name
);
485 struct smatch_state
*merge_str_state(struct smatch_state
*s1
, struct smatch_state
*s2
);
486 struct smatch_state
*alloc_state_expr(struct expression
*expr
);
487 struct expression
*get_assigned_call(struct expression
*expr
);
488 struct expression
*get_argument_from_call_expr(struct expression_list
*args
,
490 struct expression
*get_array_expr(struct expression
*expr
);
492 char *expr_to_var(struct expression
*expr
);
493 struct symbol
*expr_to_sym(struct expression
*expr
);
494 char *expr_to_str(struct expression
*expr
);
495 char *expr_to_str_sym(struct expression
*expr
,
496 struct symbol
**sym_ptr
);
497 char *expr_to_var_sym(struct expression
*expr
,
498 struct symbol
**sym_ptr
);
499 char *expr_to_known_chunk_sym(struct expression
*expr
, struct symbol
**sym
);
500 char *expr_to_chunk_sym_vsl(struct expression
*expr
, struct symbol
**sym
, struct var_sym_list
**vsl
);
501 int get_complication_score(struct expression
*expr
);
503 int sym_name_is(const char *name
, struct expression
*expr
);
504 int get_const_value(struct expression
*expr
, sval_t
*sval
);
505 int get_value(struct expression
*expr
, sval_t
*val
);
506 int get_implied_value(struct expression
*expr
, sval_t
*val
);
507 int get_implied_value_fast(struct expression
*expr
, sval_t
*sval
);
508 int get_implied_min(struct expression
*expr
, sval_t
*sval
);
509 int get_implied_max(struct expression
*expr
, sval_t
*val
);
510 int get_hard_max(struct expression
*expr
, sval_t
*sval
);
511 int get_fuzzy_min(struct expression
*expr
, sval_t
*min
);
512 int get_fuzzy_max(struct expression
*expr
, sval_t
*max
);
513 int get_absolute_min(struct expression
*expr
, sval_t
*sval
);
514 int get_absolute_max(struct expression
*expr
, sval_t
*sval
);
515 int parse_call_math(struct expression
*expr
, char *math
, sval_t
*val
);
516 int parse_call_math_rl(struct expression
*call
, const char *math
, struct range_list
**rl
);
517 const char *get_allocation_math(struct expression
*expr
);
518 char *get_value_in_terms_of_parameter_math(struct expression
*expr
);
519 char *get_value_in_terms_of_parameter_math_var_sym(const char *var
, struct symbol
*sym
);
520 int expr_is_zero(struct expression
*expr
);
521 int known_condition_true(struct expression
*expr
);
522 int known_condition_false(struct expression
*expr
);
523 int implied_condition_true(struct expression
*expr
);
524 int implied_condition_false(struct expression
*expr
);
525 int can_integer_overflow(struct symbol
*type
, struct expression
*expr
);
526 void clear_math_cache(void);
527 void clear_strip_cache(void);
528 void set_fast_math_only(void);
529 void clear_fast_math_only(void);
531 int is_array(struct expression
*expr
);
532 struct expression
*get_array_base(struct expression
*expr
);
533 struct expression
*get_array_offset(struct expression
*expr
);
534 const char *show_state(struct smatch_state
*state
);
535 struct statement
*get_expression_statement(struct expression
*expr
);
536 struct expression
*strip__builtin_choose_expr(struct expression
*expr
);
537 struct expression
*strip_Generic(struct expression
*expr
);
538 struct expression
*strip_parens(struct expression
*expr
);
539 struct expression
*strip_expr(struct expression
*expr
);
540 struct expression
*strip_no_cast(struct expression
*expr
);
541 struct expression
*strip_expr_set_parent(struct expression
*expr
);
542 void scoped_state(int my_id
, const char *name
, struct symbol
*sym
);
543 int is_error_return(struct expression
*expr
);
544 int getting_address(struct expression
*expr
);
545 int get_struct_and_member(struct expression
*expr
, const char **type
, const char **member
);
546 char *get_member_name(struct expression
*expr
);
547 char *get_fnptr_name(struct expression
*expr
);
548 int cmp_pos(struct position pos1
, struct position pos2
);
549 int positions_eq(struct position pos1
, struct position pos2
);
550 struct statement
*get_current_statement(void);
551 struct statement
*get_prev_statement(void);
552 struct expression
*get_last_expr_from_expression_stmt(struct expression
*expr
);
554 enum { RET_SUCCESS
, RET_FAIL
, RET_UNKNOWN
};
555 int success_fail_return(struct range_list
*rl
);
557 #define RETURN_VAR -1
558 #define LOCAL_SCOPE -2
559 #define FILE_SCOPE -3
560 #define GLOBAL_SCOPE -4
561 #define UNKNOWN_SCOPE -5
563 char *swap_names(const char *orig
, const char *remove
, const char *add
);
564 char *get_param_var_sym_var_sym(const char *name
, struct symbol
*sym
, struct expression
*ret_expr
, struct symbol
**sym_p
);
565 char *get_param_name_sym(struct expression
*expr
, struct symbol
**sym_p
);
566 int get_return_param_key_from_var_sym(const char *name
, struct symbol
*sym
,
567 struct expression
*ret_expr
,
569 int get_param_key_from_var_sym(const char *name
, struct symbol
*sym
,
570 struct expression
*ret_expr
,
572 int get_param_key_from_sm(struct sm_state
*sm
, struct expression
*ret_expr
,
574 int get_param_key_from_expr(struct expression
*expr
, struct expression
*ret_expr
,
576 const char *get_param_key_swap_dollar(struct expression
*expr
);
577 int map_to_param(const char *name
, struct symbol
*sym
);
578 int get_param_num_from_sym(struct symbol
*sym
);
579 int get_param_num(struct expression
*expr
);
580 struct symbol
*get_param_sym_from_num(int num
);
581 struct expression
*map_container_of_to_simpler_expr_key(struct expression
*expr
, const char *orig_key
, char **new_key
);
582 const char *get_container_of_str(struct expression
*expr
);
583 bool get_offset_param(const char *ret_str
, int *offset
, int *param
);
584 /* smatch_points_to_container.c */
585 struct expression
*get_stored_container(struct expression
*expr
, int offset
);
587 int ms_since(struct timeval
*start
);
588 int parent_is_gone_var_sym(const char *name
, struct symbol
*sym
);
589 int parent_is_gone(struct expression
*expr
);
590 bool is_noderef_ptr(struct expression
*expr
);
591 int invert_op(int op
);
592 int op_remove_assign(int op
);
593 int expr_equiv(struct expression
*one
, struct expression
*two
);
594 void push_int(struct int_stack
**stack
, int num
);
595 int pop_int(struct int_stack
**stack
);
596 bool macro_to_ul(const char *macro
, unsigned long *val
);
599 struct symbol
*get_real_base_type(struct symbol
*sym
);
600 int type_bytes(struct symbol
*type
);
601 int array_bytes(struct symbol
*type
);
602 struct symbol
*get_pointer_type(struct expression
*expr
);
603 struct symbol
*get_type(struct expression
*expr
);
604 struct symbol
*get_comparison_type(struct expression
*expr
);
605 struct symbol
*get_final_type(struct expression
*expr
);
606 struct symbol
*get_promoted_type(struct symbol
*left
, struct symbol
*right
);
607 int type_signed(struct symbol
*base_type
);
608 int expr_unsigned(struct expression
*expr
);
609 int expr_signed(struct expression
*expr
);
610 int returns_unsigned(struct symbol
*base_type
);
611 int is_pointer(struct expression
*expr
);
612 bool is_void_ptr(struct symbol
*type
);
613 int returns_pointer(struct symbol
*base_type
);
614 sval_t
sval_type_max(struct symbol
*base_type
);
615 sval_t
sval_type_min(struct symbol
*base_type
);
616 int nr_bits(struct expression
*expr
);
617 int is_void_pointer(struct expression
*expr
);
618 int is_char_pointer(struct expression
*expr
);
619 int is_string(struct expression
*expr
);
620 bool is_struct_ptr(struct symbol
*type
);
621 int is_static(struct expression
*expr
);
622 bool is_local_variable(struct expression
*expr
);
623 int types_equiv(struct symbol
*one
, struct symbol
*two
);
624 bool type_fits(struct symbol
*type
, struct symbol
*test
);
626 const char *global_static();
627 struct symbol
*cur_func_return_type(void);
628 struct symbol
*get_arg_type(struct expression
*fn
, int arg
);
629 struct symbol
*get_member_type_from_key(struct expression
*expr
, const char *key
);
630 struct symbol
*get_arg_type_from_key(struct expression
*fn
, int param
, struct expression
*arg
, const char *key
);
631 int is_struct(struct expression
*expr
);
632 char *type_to_str(struct symbol
*type
);
634 /* smatch_ignore.c */
635 void add_ignore(int owner
, const char *name
, struct symbol
*sym
);
636 int is_ignored(int owner
, const char *name
, struct symbol
*sym
);
637 void add_ignore_expr(int owner
, struct expression
*expr
);
638 int is_ignored_expr(int owner
, struct expression
*expr
);
641 struct smatch_state
*alloc_var_sym_state(const char *var
, struct symbol
*sym
);
642 struct var_sym
*alloc_var_sym(const char *var
, struct symbol
*sym
);
643 struct var_sym_list
*expr_to_vsl(struct expression
*expr
);
644 void add_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
645 void add_var_sym_expr(struct var_sym_list
**list
, struct expression
*expr
);
646 void del_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
647 int in_var_sym_list(struct var_sym_list
*list
, const char *var
, struct symbol
*sym
);
648 struct var_sym_list
*clone_var_sym_list(struct var_sym_list
*from_vsl
);
649 void merge_var_sym_list(struct var_sym_list
**dest
, struct var_sym_list
*src
);
650 struct var_sym_list
*combine_var_sym_lists(struct var_sym_list
*one
, struct var_sym_list
*two
);
651 int var_sym_lists_equiv(struct var_sym_list
*one
, struct var_sym_list
*two
);
652 void free_var_sym_list(struct var_sym_list
**list
);
653 void free_var_syms_and_list(struct var_sym_list
**list
);
656 struct tracker
*alloc_tracker(int owner
, const char *name
, struct symbol
*sym
);
657 void add_tracker(struct tracker_list
**list
, int owner
, const char *name
,
659 void add_tracker_expr(struct tracker_list
**list
, int owner
, struct expression
*expr
);
660 void del_tracker(struct tracker_list
**list
, int owner
, const char *name
,
662 int in_tracker_list(struct tracker_list
*list
, int owner
, const char *name
,
664 void free_tracker_list(struct tracker_list
**list
);
665 void free_trackers_and_list(struct tracker_list
**list
);
667 /* smatch_conditions */
668 int in_condition(void);
672 extern int __in_fake_assign
;
673 extern int __in_fake_parameter_assign
;
674 extern int __in_fake_struct_assign
;
675 extern int __in_buf_clear
;
676 extern int __in_fake_var_assign
;
677 extern int __in_builtin_overflow_func
;
678 extern int __fake_state_cnt
;
679 extern int __debug_skip
;
680 extern int in_fake_env
;
681 bool is_fake_var_assign(struct expression
*expr
);
682 void smatch (struct string_list
*filelist
);
683 int inside_loop(void);
684 int definitely_inside_loop(void);
685 void add_once_through_hook(bool_stmt_func
*fn
);
686 struct expression
*get_switch_expr(void);
687 int in_expression_statement(void);
688 void __process_post_op_stack(void);
689 void __split_expr(struct expression
*expr
);
690 void __split_label_stmt(struct statement
*stmt
);
691 void __split_stmt(struct statement
*stmt
);
692 extern int __in_function_def
;
693 extern int __in_unmatched_hook
;
694 extern int option_assume_loops
;
695 extern int option_two_passes
;
696 extern int option_no_db
;
697 extern int option_file_output
;
698 extern int option_time
;
699 extern int option_time_stmt
;
700 extern struct expression_list
*big_expression_stack
;
701 extern struct expression_list
*big_condition_stack
;
702 extern struct statement_list
*big_statement_stack
;
703 int is_condition_call(struct expression
*expr
);
704 int is_assigned_call(struct expression
*expr
);
705 int is_fake_assigned_call(struct expression
*expr
);
706 void add_function_data(unsigned long *fn_data
);
707 int inlinable(struct expression
*expr
);
708 extern int __inline_call
;
709 extern struct expression
*__inline_fn
;
710 extern int __in_pre_condition
;
711 extern int __bail_on_rest_of_function
;
712 extern struct statement
*__prev_stmt
;
713 extern struct statement
*__cur_stmt
;
714 extern struct statement
*__next_stmt
;
715 void init_fake_env(void);
716 void end_fake_env(void);
717 int time_parsing_function(void);
718 bool taking_too_long(void);
719 struct statement
*get_last_stmt(void);
720 int is_last_stmt(struct statement
*cur_stmt
);
722 /* smatch_struct_assignment.c */
723 struct expression
*get_faked_expression(void);
724 void __fake_struct_member_assignments(struct expression
*expr
);
725 void create_recursive_fake_assignments(struct expression
*expr
,
726 void (*assign_handler
)(struct expression
*expr
, void *data
),
729 /* smatch_project.c */
730 int is_no_inline_function(const char *function
);
732 /* smatch_conditions */
733 void __split_whole_condition(struct expression
*expr
);
734 void __handle_logic(struct expression
*expr
);
735 int is_condition(struct expression
*expr
);
736 int __handle_condition_assigns(struct expression
*expr
);
737 int __handle_select_assigns(struct expression
*expr
);
738 int __handle_expr_statement_assigns(struct expression
*expr
);
740 /* smatch_implied.c */
741 struct range_list_stack
;
742 void param_limit_implications(struct expression
*expr
, int param
, char *key
, char *value
, struct stree
**implied
);
743 struct stree
*__implied_case_stree(struct expression
*switch_expr
,
744 struct range_list
*case_rl
,
745 struct range_list_stack
**remaining_cases
,
746 struct stree
**raw_stree
);
747 void overwrite_states_using_pool(struct sm_state
*gate_sm
, struct sm_state
*pool_sm
);
748 int assume(struct expression
*expr
);
749 void end_assume(void);
750 int impossible_assumption(struct expression
*left
, int op
, sval_t sval
);
753 bool has_dynamic_states(unsigned short owner
);
754 void set_dynamic_states(unsigned short owner
);
756 /* smatch_extras.c */
757 int in_warn_on_macro(void);
758 extern int SMATCH_EXTRA
;
759 extern int RETURN_ID
;
766 char *get_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
767 char *map_call_to_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
768 char *map_long_to_short_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
, bool use_stack
);
770 #define STRLEN_MAX_RET 1010101
772 /* smatch_absolute.c */
773 int get_absolute_min_helper(struct expression
*expr
, sval_t
*sval
);
774 int get_absolute_max_helper(struct expression
*expr
, sval_t
*sval
);
776 /* smatch_type_value.c */
777 void disable_type_val_lookups(void);
778 void enable_type_val_lookups(void);
779 void clear_type_value_cache(void);
780 int get_db_type_rl(struct expression
*expr
, struct range_list
**rl
);
782 /* smatch_data_val.c */
783 int get_mtag_rl(struct expression
*expr
, struct range_list
**rl
);
784 /* smatch_array_values.c */
785 void clear_array_values_cache(void);
786 int get_array_rl(struct expression
*expr
, struct range_list
**rl
);
788 /* smatch_states.c */
789 struct stree
*__swap_cur_stree(struct stree
*stree
);
790 void __push_fake_cur_stree();
791 struct stree
*__pop_fake_cur_stree();
792 void __free_fake_cur_stree();
793 void __set_fake_cur_stree_fast(struct stree
*stree
);
794 void __pop_fake_cur_stree_fast(void);
795 void __merge_stree_into_cur(struct stree
*stree
);
797 int unreachable(void);
798 void __set_cur_stree_readonly(void);
799 void __set_cur_stree_writable(void);
800 void __set_sm(struct sm_state
*sm
);
801 void __set_sm_cur_stree(struct sm_state
*sm
);
802 void __set_true_false_sm(struct sm_state
*true_state
,
803 struct sm_state
*false_state
);
804 void nullify_path(void);
805 void __match_nullify_path_hook(const char *fn
, struct expression
*expr
,
807 void __unnullify_path(void);
808 int __path_is_null(void);
809 void save_all_states(void);
810 void restore_all_states(void);
811 void free_goto_stack(void);
812 void clear_all_states(void);
814 struct sm_state
*get_sm_state(int owner
, const char *name
,
816 struct sm_state
*get_sm_state_expr(int owner
, struct expression
*expr
);
817 void __push_true_states(void);
818 void __use_false_states(void);
819 void __discard_false_states(void);
820 void __merge_false_states(void);
821 void __merge_true_states(void);
823 void __negate_cond_stacks(void);
824 void __use_pre_cond_states(void);
825 void __use_cond_true_states(void);
826 void __use_cond_false_states(void);
827 void __push_cond_stacks(void);
828 void __fold_in_set_states(void);
829 void __free_set_states(void);
830 struct stree
*__copy_cond_true_states(void);
831 struct stree
*__copy_cond_false_states(void);
832 struct stree
*__pop_cond_true_stack(void);
833 struct stree
*__pop_cond_false_stack(void);
834 void __and_cond_states(void);
835 void __or_cond_states(void);
836 void __save_pre_cond_states(void);
837 void __discard_pre_cond_states(void);
838 struct stree
*__get_true_states(void);
839 struct stree
*__get_false_states(void);
840 void __use_cond_states(void);
841 extern struct state_list
*__last_base_slist
;
843 void __push_continues(void);
844 void __discard_continues(void);
845 void __process_continues(void);
846 void __merge_continues(void);
848 void __push_breaks(void);
849 void __process_breaks(void);
850 int __has_breaks(void);
851 void __merge_breaks(void);
852 void __use_breaks(void);
854 void __save_switch_states(struct expression
*switch_expr
);
855 void __discard_switches(void);
856 int have_remaining_cases(void);
857 void __merge_switches(struct expression
*switch_expr
, struct range_list
*case_rl
);
858 void __push_default(void);
859 void __set_default(void);
860 bool __has_default_case(void);
861 int __pop_default(void);
863 void __push_conditions(void);
864 void __discard_conditions(void);
866 void __save_gotos(const char *name
, struct symbol
*sym
);
867 void __merge_gotos(const char *name
, struct symbol
*sym
);
869 void __discard_fake_states(struct expression
*call
);
871 void __print_cur_stree(void);
872 bool __print_states(const char *owner
);
873 typedef void (check_tracker_hook
)(int owner
, const char *name
, struct symbol
*sym
, struct smatch_state
*state
);
874 void add_check_tracker(const char *check_name
, check_tracker_hook
*fn
);
877 void __pass_to_client(void *data
, enum hook_type type
);
878 void __pass_case_to_client(struct expression
*switch_expr
,
879 struct range_list
*rl
);
880 int __has_merge_function(int client_id
);
881 struct smatch_state
*__client_merge_function(int owner
,
882 struct smatch_state
*s1
,
883 struct smatch_state
*s2
);
884 struct smatch_state
*__client_unmatched_state_function(struct sm_state
*sm
);
885 void call_pre_merge_hook(struct sm_state
*cur
, struct sm_state
*other
);
886 void __push_scope_hooks(void);
887 void __call_scope_hooks(void);
888 void add_array_initialized_hook(void (*hook
)(struct expression
*array
, int nr
));
889 void __call_array_initialized_hooks(struct expression
*array
, int nr
);
891 /* smatch_function_hooks.c */
892 void add_fake_call_after_return(struct expression
*call
);
893 void create_function_hook_hash(void);
894 void __match_initializer_call(struct symbol
*sym
);
896 struct expression
*get_unfaked_call(void);
897 void fake_param_assign_helper(struct expression
*call
, struct expression
*fake_assign
);
903 * Changing these numbers is a pain. Don't do it. If you ever use a
904 * number it can't be re-used right away so there may be gaps.
905 * We select these in order by type so if the order matters, then give
906 * it a number below 100-999,9000-9999 ranges. */
921 ABSOLUTE_LIMITS
= 1010,
935 UNTRACKED_PARAM
= 1023,
941 COMPARE_LIMIT
= 1028,
942 PARAM_COMPARE
= 1029,
945 CONSTRAINT_REQUIRED
= 1033,
956 POWER_OF_TWO_SET
= 1049,
962 NEGATIVE_ERROR
= 1057,
966 /* put random temporary stuff in the 7000-7999 range for testing */
968 HOST_DATA_SET
= 7017,
972 USER_DATA_SET
= 9017,
976 NO_OVERFLOW_SIMPLE
= 8019,
982 KNOWN_UNLOCKED
= 9025,
987 REFCOUNT_INIT
= 9025,
990 NO_SIDE_EFFECT
= 8025,
993 ARRAYSIZE_ARG
= 8033,
1007 /* Do not use numbers above 100k */
1010 extern struct sqlite3
*smatch_db
;
1011 extern struct sqlite3
*mem_db
;
1012 extern struct sqlite3
*cache_db
;
1014 bool db_incomplete(void);
1015 void db_ignore_states(int id
);
1016 typedef bool (delete_hook
)(struct expression
*expr
);
1017 void add_delete_return_hook(delete_hook
*hook
);
1018 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
);
1019 void select_caller_name_sym(void (*fn
)(const char *name
, struct symbol
*sym
, char *value
), int type
);
1020 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
));
1021 void add_caller_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
));
1022 void add_return_info_callback(int owner
,
1023 void (*callback
)(int return_id
, char *return_ranges
,
1024 struct expression
*returned_expr
,
1026 const char *printed_name
,
1027 struct sm_state
*sm
));
1028 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
));
1029 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
));
1030 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
1031 void select_return_implies_hook_early(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
1032 void select_return_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
1033 struct range_list
*db_return_vals(struct expression
*expr
);
1034 struct range_list
*db_return_vals_from_str(const char *fn_name
);
1035 struct range_list
*db_return_vals_no_args(struct expression
*expr
);
1036 bool split_param_key(const char *value
, int *param
, char *key
, int len
);
1037 bool get_implied_rl_from_call_str(struct expression
*expr
, const char *data
, struct range_list
**rl
);
1038 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
);
1039 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
);
1040 char *get_name_sym_from_param_key(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
);
1041 char *get_param_name_var_sym(const char *name
, struct symbol
*sym
);
1042 char *get_param_name(struct sm_state
*sm
);
1043 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
);
1044 const char *get_mtag_name_expr(struct expression
*expr
);
1045 char *get_data_info_name(struct expression
*expr
);
1046 char *sm_to_arg_name(struct expression
*expr
, struct sm_state
*sm
);
1047 int is_recursive_member(const char *param_name
);
1049 char *escape_newlines(const char *str
);
1050 void sql_exec(struct sqlite3
*db
, int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
);
1052 #define sql_helper(db, call_back, data, sql...) \
1054 char sql_txt[1024]; \
1056 sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql); \
1057 db_debug("debug: %s\n", sql_txt); \
1058 sql_exec(db, call_back, data, sql_txt); \
1062 #define run_sql(call_back, data, sql...) \
1066 sql_helper(smatch_db, call_back, data, sql); \
1069 #define mem_sql(call_back, data, sql...) \
1070 sql_helper(mem_db, call_back, data, sql)
1072 #define cache_sql(call_back, data, sql...) \
1073 sql_helper(cache_db, call_back, data, sql)
1075 #define sql_insert_helper(table, db, ignore, late, values...) \
1077 struct sqlite3 *_db = db; \
1079 if (__inline_fn && !_db) \
1083 char *err, *p = buf; \
1086 p += snprintf(p, buf + sizeof(buf) - p, \
1087 "insert %sinto %s values (", \
1088 ignore ? "or ignore " : "", #table); \
1089 p += snprintf(p, buf + sizeof(buf) - p, values); \
1090 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
1091 db_debug("mem-db: %s\n", buf); \
1092 rc = sqlite3_exec(_db, buf, NULL, NULL, &err); \
1093 if (rc != SQLITE_OK) { \
1094 sm_ierror("SQL error #2: %s", err); \
1095 sm_ierror("SQL: '%s'", buf); \
1100 if (option_info) { \
1101 FILE *tmp_fd = sm_outfd; \
1102 sm_outfd = sql_outfd; \
1104 sm_printf("SQL%s: insert %sinto " #table " values(", \
1105 late ? "_late" : "", ignore ? "or ignore " : ""); \
1106 sm_printf(values); \
1107 sm_printf(");\n"); \
1108 sm_outfd = tmp_fd; \
1112 #define sql_insert(table, values...) sql_insert_helper(table, NULL, 0, 0, values);
1113 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, NULL, 1, 0, values);
1114 #define sql_insert_late(table, values...) sql_insert_helper(table, NULL, 0, 1, values);
1115 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1116 #define sql_insert_cache_or_ignore(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1118 char *get_static_filter(struct symbol
*sym
);
1120 void sql_insert_return_states(int return_id
, const char *return_ranges
,
1121 int type
, int param
, const char *key
, const char *value
);
1122 void sql_insert_caller_info(struct expression
*call
, int type
, int param
,
1123 const char *key
, const char *value
);
1124 void sql_insert_function_ptr(const char *fn
, const char *struct_name
);
1125 void sql_insert_return_values(const char *return_values
);
1126 void sql_insert_return_implies(int type
, int param
, const char *key
, const char *value
);
1127 void sql_insert_function_type_size(const char *member
, const char *ranges
);
1128 void sql_insert_function_type_info(int type
, const char *struct_type
, const char *member
, const char *value
);
1129 void sql_insert_type_info(int type
, const char *member
, const char *value
);
1130 void sql_insert_local_values(const char *name
, const char *value
);
1131 void sql_insert_function_type_value(const char *type
, const char *value
);
1132 void sql_insert_function_type(int param
, const char *value
);
1133 void sql_insert_parameter_name(int param
, const char *value
);
1134 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
);
1135 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
);
1136 void sql_save_constraint(const char *con
);
1137 void sql_save_constraint_required(const char *data
, int op
, const char *limit
);
1138 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
);
1139 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
);
1140 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
);
1141 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
);
1142 void sql_insert_mtag_info(mtag_t tag
, int type
, const char *value
);
1143 void sql_insert_mtag_map(mtag_t container
, int container_offset
, mtag_t tag
, int tag_offset
);
1144 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
);
1145 int mtag_map_select_container(mtag_t tag
, int container_offset
, mtag_t
*container
);
1146 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
);
1147 struct smatch_state
*get_mtag_return(struct expression
*expr
, struct smatch_state
*state
);
1148 struct range_list
*swap_mtag_seed(struct expression
*expr
, struct range_list
*rl
);
1150 bool is_fn_ptr(struct expression
*fn
);
1151 void sql_select_return_states(const char *cols
, struct expression
*call
,
1152 int (*callback
)(void*, int, char**, char**), void *info
);
1153 void sql_select_call_implies(const char *cols
, struct expression
*call
,
1154 int (*callback
)(void*, int, char**, char**));
1156 void open_smatch_db(char *db_file
);
1158 /* smatch_files.c */
1159 int open_data_file(const char *filename
);
1160 int open_schema_file(const char *schema
);
1161 struct token
*get_tokens_file(const char *filename
);
1162 struct string_list
*load_strings_from_file(const char *project
, const char *filename
);
1165 extern char *option_debug_check
;
1166 extern char *option_debug_var
;
1167 extern char *option_process_function
;
1168 extern char *option_project_str
;
1169 extern char *bin_dir
;
1170 extern char *data_dir
;
1171 extern int option_no_data
;
1172 extern int option_full_path
;
1173 extern int option_call_tree
;
1174 extern int num_checks
;
1180 PROJ_ILLUMOS_KERNEL
,
1184 extern enum project_type option_project
;
1185 const char *check_name(unsigned short id
);
1186 int id_from_name(const char *name
);
1189 /* smatch_buf_size.c */
1190 int bytes_to_elements(struct expression
*expr
, int bytes
);
1191 int get_array_size(struct expression
*expr
);
1192 int get_array_size_bytes(struct expression
*expr
);
1193 int get_array_size_bytes_min(struct expression
*expr
);
1194 int get_array_size_bytes_max(struct expression
*expr
);
1195 struct range_list
*get_array_size_bytes_rl(struct expression
*expr
);
1196 int get_real_array_size(struct expression
*expr
);
1197 int last_member_is_resizable(struct symbol
*type
);
1198 /* smatch_strlen.c */
1199 bool is_strlen(struct expression
*expr
);
1200 int get_implied_strlen(struct expression
*expr
, struct range_list
**rl
);
1201 int get_size_from_strlen(struct expression
*expr
);
1203 /* smatch_capped.c */
1204 int is_capped(struct expression
*expr
);
1205 int is_capped_var_sym(const char *name
, struct symbol
*sym
);
1207 /* smatch_kernel_user_data.c */
1208 int is_user_macro(struct expression
*expr
);
1209 int is_capped_user_data(struct expression
*expr
);
1210 int implied_user_data(struct expression
*expr
, struct range_list
**rl
);
1211 struct stree
*get_user_stree(void);
1212 int get_user_rl(struct expression
*expr
, struct range_list
**rl
);
1213 int is_user_rl(struct expression
*expr
);
1214 int get_user_rl_var_sym(const char *name
, struct symbol
*sym
, struct range_list
**rl
);
1215 void mark_as_user_data(struct expression
*expr
, bool isnew
);
1216 bool user_rl_capped_var_sym(const char *name
, struct symbol
*sym
);
1217 bool user_rl_capped(struct expression
*expr
);
1218 struct range_list
*var_user_rl(struct expression
*expr
);
1219 bool we_pass_user_data(struct expression
*call
);
1220 /* smatch_points_to_user_data.c */
1221 bool is_user_data_fn(struct symbol
*fn
);
1222 bool is_skb_data(struct expression
*expr
);
1223 bool is_socket_stuff(struct symbol
*sym
);
1224 bool points_to_user_data(struct expression
*expr
);
1225 void set_array_user_ptr(struct expression
*expr
, bool is_new
);
1227 /* smatch_kernel_host_data.c */
1228 int is_host_macro(struct expression
*expr
);
1229 int get_host_data_fn_param(const char *fn
);
1230 int is_capped_host_data(struct expression
*expr
);
1231 int implied_host_data(struct expression
*expr
, struct range_list
**rl
);
1232 struct stree
*get_host_stree(void);
1233 int get_host_rl(struct expression
*expr
, struct range_list
**rl
);
1234 int is_host_rl(struct expression
*expr
);
1235 int get_host_rl_var_sym(const char *name
, struct symbol
*sym
, struct range_list
**rl
);
1236 bool host_rl_capped(struct expression
*expr
);
1237 struct range_list
*var_host_rl(struct expression
*expr
);
1238 bool we_pass_host_data(struct expression
*call
);
1239 /* smatch_points_to_host_data.c */
1240 bool is_host_data_fn(struct symbol
*fn
);
1241 bool points_to_host_data(struct expression
*expr
);
1242 void set_points_to_host_data(struct expression
*expr
, bool is_new
);
1243 bool is_fn_points_to_host_data(const char *fn
);
1244 /* check_locking.c */
1245 void print_held_locks();
1247 void __preempt_add(void);
1248 void __preempt_sub(void);
1249 int get_preempt_cnt(void);
1250 void clear_preempt_cnt(void);
1251 bool function_decrements_preempt(void);
1252 void add_sleep_callback(expr_func
*fn
);
1253 unsigned long GFP_DIRECT_RECLAIM(void);
1254 unsigned long GFP_ATOMIC(void);
1256 /* check_assigned_expr.c */
1257 extern int check_assigned_expr_id
;
1258 struct expression
*get_assigned_expr(struct expression
*expr
);
1259 struct sm_state
*get_assigned_sm(struct expression
*expr
);
1260 struct expression
*get_assigned_expr_recurse(struct expression
*expr
);
1261 struct expression
*get_assigned_expr_name_sym(const char *name
, struct symbol
*sym
);
1262 struct expression
*get_assigned_expr_name_sym_recurse(const char *name
, struct symbol
*sym
);
1264 /* smatch_return_to_param.c */
1265 char *map_call_to_param_name_sym(struct expression
*expr
, struct symbol
**sym
);
1267 /* smatch_comparison.c */
1268 extern int comparison_id
;
1269 #define UNKNOWN_COMPARISON 0
1270 #define IMPOSSIBLE_COMPARISON -1
1271 struct compare_data
{
1272 /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1273 struct expression
*left
;
1274 const char *left_var
;
1275 struct var_sym_list
*left_vsl
;
1277 struct expression
*right
;
1278 const char *right_var
;
1279 struct var_sym_list
*right_vsl
;
1281 DECLARE_ALLOCATOR(compare_data
);
1282 struct smatch_state
*alloc_compare_state(
1283 struct expression
*left
,
1284 const char *left_var
, struct var_sym_list
*left_vsl
,
1286 struct expression
*right
,
1287 const char *right_var
, struct var_sym_list
*right_vsl
);
1288 int comparison_intersection(int orig
, int op
);
1289 int merge_comparisons(int one
, int two
);
1290 int combine_comparisons(int left_compare
, int right_compare
);
1291 int state_to_comparison(struct smatch_state
*state
);
1292 struct smatch_state
*merge_compare_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
1293 int get_comparison(struct expression
*left
, struct expression
*right
);
1294 int get_comparison_no_extra(struct expression
*a
, struct expression
*b
);
1295 int get_comparison_strings(const char *one
, const char *two
);
1296 int possible_comparison(struct expression
*a
, int comparison
, struct expression
*b
);
1297 struct state_list
*get_all_comparisons(struct expression
*expr
);
1298 struct state_list
*get_all_possible_equal_comparisons(struct expression
*expr
);
1299 void __add_comparison_info(struct expression
*expr
, struct expression
*call
, const char *range
);
1300 char *get_printed_param_name(struct expression
*call
, const char *param_name
, struct symbol
*param_sym
);
1301 char *name_sym_to_param_comparison(const char *name
, struct symbol
*sym
);
1302 char *expr_equal_to_param(struct expression
*expr
, int ignore
);
1303 char *expr_lte_to_param(struct expression
*expr
, int ignore
);
1304 char *expr_param_comparison(struct expression
*expr
, int ignore
);
1305 int flip_comparison(int op
);
1306 int negate_comparison(int op
);
1307 int remove_unsigned_from_comparison(int op
);
1308 int param_compare_limit_is_impossible(struct expression
*expr
, int left_param
, char *left_key
, char *value
);
1309 void filter_by_comparison(struct range_list
**rl
, int comparison
, struct range_list
*right
);
1310 void __compare_param_limit_hook(struct expression
*left_expr
, struct expression
*right_expr
,
1311 const char *state_name
,
1312 struct smatch_state
*true_state
, struct smatch_state
*false_state
);
1313 int impossibly_high_comparison(struct expression
*expr
);
1314 void add_comparison_var_sym(
1315 struct expression
*left_expr
,
1316 const char *left_name
, struct var_sym_list
*left_vsl
,
1318 struct expression
*right_expr
,
1319 const char *right_name
, struct var_sym_list
*right_vsl
,
1320 struct expression
*mod_expr
);
1323 sval_t
*sval_alloc(sval_t sval
);
1324 sval_t
*sval_alloc_permanent(sval_t sval
);
1325 sval_t
sval_blank(struct expression
*expr
);
1326 sval_t
sval_type_val(struct symbol
*type
, long long val
);
1327 sval_t
sval_type_fval(struct symbol
*type
, long double fval
);
1328 sval_t
sval_from_val(struct expression
*expr
, long long val
);
1329 sval_t
sval_from_fval(struct expression
*expr
, long double fval
);
1330 int sval_is_ptr(sval_t sval
);
1331 bool sval_is_fp(sval_t sval
);
1332 int sval_unsigned(sval_t sval
);
1333 int sval_signed(sval_t sval
);
1334 int sval_bits(sval_t sval
);
1335 int sval_bits_used(sval_t sval
);
1336 int sval_is_negative(sval_t sval
);
1337 int sval_is_positive(sval_t sval
);
1338 int sval_is_min(sval_t sval
);
1339 int sval_is_max(sval_t sval
);
1340 int sval_is_a_min(sval_t sval
);
1341 int sval_is_a_max(sval_t sval
);
1342 int sval_is_negative_min(sval_t sval
);
1343 int sval_cmp_t(struct symbol
*type
, sval_t one
, sval_t two
);
1344 int sval_cmp_val(sval_t one
, long long val
);
1345 sval_t
sval_min(sval_t one
, sval_t two
);
1346 sval_t
sval_min_nonneg(sval_t one
, sval_t two
);
1347 sval_t
sval_max(sval_t one
, sval_t two
);
1348 int sval_too_low(struct symbol
*type
, sval_t sval
);
1349 int sval_too_high(struct symbol
*type
, sval_t sval
);
1350 int sval_fits(struct symbol
*type
, sval_t sval
);
1351 sval_t
sval_cast(struct symbol
*type
, sval_t sval
);
1352 sval_t
sval_preop(sval_t sval
, int op
);
1353 sval_t
sval_binop(sval_t left
, int op
, sval_t right
);
1354 int sval_binop_overflows(sval_t left
, int op
, sval_t right
);
1355 int sval_binop_overflows_no_sign(sval_t left
, int op
, sval_t right
);
1356 int find_first_zero_bit(unsigned long long uvalue
);
1357 int sm_fls64(unsigned long long uvalue
);
1358 unsigned long long fls_mask(unsigned long long uvalue
);
1359 unsigned long long sval_fls_mask(sval_t sval
);
1360 const char *sval_to_str(sval_t sval
);
1361 const char *sval_to_str_or_err_ptr(sval_t sval
);
1362 const char *sval_to_numstr(sval_t sval
);
1363 sval_t
ll_to_sval(long long val
);
1365 /* smatch_string_list.c */
1366 int list_has_string(struct string_list
*str_list
, const char *str
);
1367 int insert_string(struct string_list
**str_list
, const char *str
);
1368 struct string_list
*clone_str_list(struct string_list
*orig
);
1369 struct string_list
*combine_string_lists(struct string_list
*one
, struct string_list
*two
);
1371 /* smatch_start_states.c */
1372 struct stree
*get_start_states(void);
1374 /* smatch_recurse.c */
1375 int recurse(struct expression
*expr
,
1376 int (func
)(struct expression
*expr
, void *p
),
1377 void *param
, int nr
);
1378 int has_symbol(struct expression
*expr
, struct symbol
*sym
);
1379 int has_variable(struct expression
*expr
, struct expression
*var
);
1380 int has_inc_dec(struct expression
*expr
);
1382 /* smatch_stored_conditions.c */
1383 struct smatch_state
*get_stored_condition(struct expression
*expr
);
1384 struct expression_list
*get_conditions(struct expression
*expr
);
1385 struct sm_state
*stored_condition_implication_hook(struct expression
*expr
,
1386 struct state_list
**true_stack
,
1387 struct state_list
**false_stack
);
1388 /* smatch_parsed_conditions.c */
1389 struct sm_state
*parsed_condition_implication_hook(struct expression
*expr
,
1390 struct state_list
**true_stack
,
1391 struct state_list
**false_stack
);
1392 /* smatch_comparison.c */
1393 struct sm_state
*comparison_implication_hook(struct expression
*expr
,
1394 struct state_list
**true_stack
,
1395 struct state_list
**false_stack
);
1397 /* check_string_len.c */
1398 int get_formatted_string_size(struct expression
*call
, int arg
);
1399 int get_formatted_string_min_size(struct expression
*call
, int arg
);
1401 /* smatch_param_set.c */
1402 int param_was_set(struct expression
*expr
);
1403 int param_was_set_var_sym(const char *name
, struct symbol
*sym
);
1404 void print_limited_param_set(int return_id
, char *return_ranges
, struct expression
*expr
);
1406 void __promote_sets_to_clears(int return_id
, char *return_ranges
, struct expression
*expr
);
1407 bool parent_was_PARAM_CLEAR(const char *name
, struct symbol
*sym
);
1408 bool parent_was_PARAM_CLEAR_ZERO(const char *name
, struct symbol
*sym
);
1410 /* smatch_param_filter.c */
1411 int param_has_filter_data(struct sm_state
*sm
);
1413 /* smatch_links.c */
1414 void set_up_link_functions(int id
, int linkid
);
1415 struct smatch_state
*merge_link_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
1416 void store_link(int link_id
, const char *name
, struct symbol
*sym
, const char *link_name
, struct symbol
*link_sym
);
1418 /* check_buf_comparison */
1419 const char *limit_type_str(unsigned int limit_type
);
1420 struct expression
*get_size_variable(struct expression
*buf
, int *limit_type
);
1421 struct expression
*get_array_variable(struct expression
*size
);
1422 int buf_comparison_index_ok(struct expression
*expr
);
1423 bool buf_comp_has_bytes(struct expression
*buf
, struct expression
*var
);
1424 bool buf_comp2_has_bytes(struct expression
*buf_expr
, struct expression
*var
);
1426 /* smatch_untracked_param.c */
1427 void mark_untracked(struct expression
*expr
, int param
, const char *key
, const char *value
);
1428 void mark_call_params_untracked(struct expression
*call
);
1429 void add_untracked_param_hook(void (func
)(struct expression
*call
, int param
));
1430 void add_lost_param_hook(void (func
)(struct expression
*call
, int param
));
1431 void mark_all_params_untracked(int return_id
, char *return_ranges
, struct expression
*expr
);
1432 /* smatch_untracked_var.c */
1433 bool is_untracked(struct expression
*expr
);
1435 /* smatch_strings.c */
1436 struct state_list
*get_strings(struct expression
*expr
);
1437 struct expression
*fake_string_from_mtag(mtag_t tag
);
1439 /* smatch_estate.c */
1440 int estate_get_single_value(struct smatch_state
*state
, sval_t
*sval
);
1442 /* smatch_address.c */
1443 int get_address_rl(struct expression
*expr
, struct range_list
**rl
);
1444 int get_member_offset(struct symbol
*type
, const char *member_name
);
1445 int get_member_offset_from_deref(struct expression
*expr
);
1447 /* for now this is in smatch_used_parameter.c */
1448 void __get_state_hook(int owner
, const char *name
, struct symbol
*sym
);
1449 extern int __ignore_param_used
;
1451 /* smatch_buf_comparison.c */
1452 int db_var_is_array_limit(struct expression
*array
, const char *name
, struct var_sym_list
*vsl
);
1454 struct range_list
*get_fs(void);
1456 struct stree
*get_all_return_states(void);
1457 struct stree_stack
*get_all_return_strees(void);
1458 int on_atomic_dec_path(void);
1459 int was_inced(const char *name
, struct symbol
*sym
);
1460 void set_refcount_inc(char *name
, struct symbol
*sym
);
1461 void set_refcount_dec(char *name
, struct symbol
*sym
);
1462 void add_refcount_init_hook(name_sym_hook
*hook
);
1463 void add_refcount_inc_hook(name_sym_hook
*hook
);
1464 void add_refcount_dec_hook(name_sym_hook
*hook
);
1466 /* smatch_constraints.c */
1467 char *get_constraint_str(struct expression
*expr
);
1468 struct constraint_list
*get_constraints(struct expression
*expr
);
1469 char *unmet_constraint(struct expression
*data
, struct expression
*offset
);
1470 char *get_required_constraint(const char *data_str
);
1472 /* smatch_container_of.c */
1473 int get_param_from_container_of(struct expression
*expr
);
1474 int get_offset_from_container_of(struct expression
*expr
);
1475 char *get_container_name(struct expression
*container
, struct expression
*expr
);
1478 unsigned long long str_to_llu_hash_helper(const char *str
);
1479 unsigned long long str_to_llu_hash(const char *str
);
1480 struct symbol
*get_symbol_from_mtag(mtag_t tag
);
1481 mtag_t
str_to_mtag(const char *str
);
1482 int get_string_mtag(struct expression
*expr
, mtag_t
*tag
);
1483 int get_toplevel_mtag(struct symbol
*sym
, mtag_t
*tag
);
1484 int create_mtag_alias(mtag_t tag
, struct expression
*expr
, mtag_t
*new);
1485 int expr_to_mtag_offset(struct expression
*expr
, mtag_t
*tag
, int *offset
);
1486 void update_mtag_data(struct expression
*expr
, struct smatch_state
*state
);
1487 int get_mtag_sval(struct expression
*expr
, sval_t
*sval
);
1489 /* Trinity fuzzer stuff */
1490 const char *get_syscall_arg_type(struct symbol
*sym
);
1493 int binfo_equiv(struct bit_info
*one
, struct bit_info
*two
);
1494 struct bit_info
*alloc_bit_info(unsigned long long set
, unsigned long long possible
);
1495 struct smatch_state
*alloc_bstate(unsigned long long set
, unsigned long long possible
);
1496 struct smatch_state
*merge_bstates(struct smatch_state
*one_state
, struct smatch_state
*two_state
);
1498 /* smatch_param_bits_set.c */
1499 void __set_param_modified_helper(struct expression
*expr
, struct smatch_state
*state
);
1500 void __set_param_modified_helper_sym(const char *name
, struct symbol
*sym
,
1501 struct smatch_state
*state
);
1503 /* smatch_param_bits_clear.c */
1504 void __set_param_modified_helper_clear(struct expression
*expr
, struct smatch_state
*state
);
1505 void __set_param_modified_helper_sym_clear(const char *name
, struct symbol
*sym
,
1506 struct smatch_state
*state
);
1508 /* smatch_bit_info.c */
1509 struct bit_info
*rl_to_binfo(struct range_list
*rl
);
1510 struct bit_info
*get_bit_info(struct expression
*expr
);
1511 struct bit_info
*get_bit_info_var_sym(const char *name
, struct symbol
*sym
);
1513 /* smatch_mem_tracker.c */
1514 extern int option_mem
;
1515 unsigned long get_mem_kb(void);
1516 unsigned long get_max_memory(void);
1518 /* smatch_goto_tracker.c */
1519 struct sm_state
*get_goto_sm_state(void);
1521 /* check_is_nospec.c */
1522 bool is_nospec(struct expression
*expr
);
1523 long get_stmt_cnt(void);
1525 /* check_kernel_units.c */
1526 struct smatch_state
*get_units(struct expression
*expr
);
1527 char *get_unit_str(struct expression
*expr
);
1528 bool is_array_size_units(struct expression
*expr
);
1529 /* smatch_nul_terminator.c */
1530 bool is_nul_terminated_var_sym(const char *name
, struct symbol
*sym
);
1531 bool is_nul_terminated(struct expression
*expr
);
1532 /* check_kernel.c */
1533 bool is_ignored_kernel_data(const char *name
);
1534 int get_gfp_param(struct expression
*expr
);
1535 struct expression
*get_netdev_priv(struct expression
*dev
);
1537 bool is_fresh_alloc_var_sym(const char *var
, struct symbol
*sym
);
1538 bool is_fresh_alloc(struct expression
*expr
);
1539 bool is_freed_var_sym(const char *name
, struct symbol
*sym
);
1540 void track_freed_param(struct expression
*expr
, struct smatch_state
*state
);
1541 void track_freed_param_var_sym(const char *name
, struct symbol
*sym
,
1542 struct smatch_state
*state
);
1543 bool is_part_of_condition(struct expression
*expr
);
1544 bool is_percent_p_print(struct expression
*expr
);
1546 void add_free_hook(name_sym_hook
*hook
);
1548 /* smatch_unconstant_macros.c */
1549 int is_unconstant_macro(struct expression
*expr
);
1551 /* smatch_assigned_state.c */
1552 void add_state_assigned_hook(int owner
, sm_hook
*call_back
);
1553 void add_ssa_state_assigned_hook(int owner
, sm_hook
*call_back
);
1555 bool possible_err_ptr(struct expression
*expr
);
1557 static inline bool type_is_ptr(struct symbol
*type
)
1560 (type
->type
== SYM_PTR
||
1561 type
->type
== SYM_ARRAY
||
1562 type
->type
== SYM_FN
);
1565 static inline bool type_is_fp(struct symbol
*type
)
1568 (type
== &float_ctype
||
1569 type
== &double_ctype
||
1570 type
== &ldouble_ctype
);
1573 static inline int type_bits(struct symbol
*type
)
1577 if (type_is_ptr(type
))
1578 return bits_in_pointer
;
1579 if (!type
->examined
)
1580 examine_symbol_type(type
);
1581 return type
->bit_size
;
1584 static inline int type_unsigned(struct symbol
*base_type
)
1588 if (is_ptr_type(base_type
))
1590 if (base_type
->ctype
.modifiers
& MOD_UNSIGNED
)
1595 static inline int type_positive_bits(struct symbol
*type
)
1599 if (is_ptr_type(type
))
1600 return bits_in_pointer
;
1601 if (type_unsigned(type
))
1602 return type_bits(type
);
1603 return type_bits(type
) - 1;
1606 static inline int sval_positive_bits(sval_t sval
)
1608 return type_positive_bits(sval
.type
);
1612 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1615 static inline int fp_cmp(sval_t one
, sval_t two
)
1617 struct symbol
*type
;
1619 if (sval_is_fp(one
) && sval_is_fp(two
))
1620 type
= type_bits(one
.type
) > type_bits(two
.type
) ? one
.type
: two
.type
;
1621 else if (sval_is_fp(one
))
1626 one
= sval_cast(type
, one
);
1627 two
= sval_cast(type
, two
);
1629 if (one
.type
== &float_ctype
) {
1630 if (one
.fvalue
< two
.fvalue
)
1632 if (one
.fvalue
== two
.fvalue
)
1636 if (one
.type
== &double_ctype
) {
1637 if (one
.dvalue
< two
.dvalue
)
1639 if (one
.dvalue
== two
.dvalue
)
1643 if (one
.type
== &ldouble_ctype
) {
1644 if (one
.ldvalue
< two
.ldvalue
)
1646 if (one
.ldvalue
== two
.ldvalue
)
1650 sm_perror("bad type in fp_cmp(): %s", type_to_str(type
));
1654 static inline int sval_cmp(sval_t one
, sval_t two
)
1656 struct symbol
*type
;
1658 if (sval_is_fp(one
) || sval_is_fp(two
))
1659 return fp_cmp(one
, two
);
1662 if (sval_positive_bits(two
) > sval_positive_bits(one
))
1664 if (type_bits(type
) < 31)
1667 one
= sval_cast(type
, one
);
1668 two
= sval_cast(type
, two
);
1670 if (type_unsigned(type
)) {
1671 if (one
.uvalue
< two
.uvalue
)
1673 if (one
.uvalue
== two
.uvalue
)
1677 /* fix me handle type promotion and unsigned values */
1678 if (one
.value
< two
.value
)
1680 if (one
.value
== two
.value
)
1685 #endif /* !SMATCH_H_ */