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 extern struct smatch_state undefined
;
43 extern struct smatch_state merged
;
44 extern struct smatch_state true_state
;
45 extern struct smatch_state false_state
;
46 DECLARE_ALLOCATOR(smatch_state
);
48 static inline void *INT_PTR(int i
)
50 return (void *)(long)i
;
53 static inline int PTR_INT(void *p
)
63 DECLARE_ALLOCATOR(tracker
);
64 DECLARE_PTR_LIST(tracker_list
, struct tracker
);
65 DECLARE_PTR_LIST(stree_stack
, struct stree
);
67 /* The first 3 struct members must match struct tracker */
72 unsigned short merged
:1;
73 unsigned short leaf
:1;
75 struct smatch_state
*state
;
77 struct sm_state
*left
;
78 struct sm_state
*right
;
79 struct state_list
*possible
;
86 DECLARE_ALLOCATOR(var_sym
);
87 DECLARE_PTR_LIST(var_sym_list
, struct var_sym
);
93 DECLARE_PTR_LIST(constraint_list
, struct constraint
);
99 extern struct alloc_info
*alloc_funcs
;
102 unsigned long long set
;
103 unsigned long long possible
;
114 DECLARATION_HOOK_AFTER
,
116 ASSIGNMENT_HOOK_AFTER
,
118 GLOBAL_ASSIGNMENT_HOOK
,
123 AFTER_LOOP_NO_BREAKS
,
125 WHOLE_CONDITION_HOOK
,
126 FUNCTION_CALL_HOOK_BEFORE
,
128 CALL_HOOK_AFTER_INLINE
,
129 FUNCTION_CALL_HOOK_AFTER_DB
,
130 CALL_ASSIGNMENT_HOOK
,
131 MACRO_ASSIGNMENT_HOOK
,
156 typedef void (void_fn
)(void);
157 typedef void (expr_func
)(struct expression
*expr
);
158 typedef void (stmt_func
)(struct statement
*stmt
);
159 typedef void (sym_func
)(struct symbol
*sym
);
160 typedef void (name_sym_hook
)(struct expression
*expr
, const char *name
, struct symbol
*sym
);
161 typedef void (sm_hook
)(struct sm_state
*sm
, struct expression
*mod_expr
);
162 typedef void (string_hook
)(struct expression
*expr
, const char *str
);
163 DECLARE_PTR_LIST(void_fn_list
, void_fn
);
164 DECLARE_PTR_LIST(expr_fn_list
, expr_func
);
165 DECLARE_PTR_LIST(stmt_fn_list
, stmt_func
);
166 DECLARE_PTR_LIST(sym_fn_list
, sym_func
);
167 DECLARE_PTR_LIST(name_sym_fn_list
, name_sym_hook
);
168 DECLARE_PTR_LIST(string_hook_list
, string_hook
);
169 void call_void_fns(struct void_fn_list
*list
);
170 void call_expr_fns(struct expr_fn_list
*list
, struct expression
*expr
);
171 void call_stmt_fns(struct stmt_fn_list
*list
, struct statement
*stmt
);
172 void call_sym_fns(struct sym_fn_list
*list
, struct symbol
*sym
);
173 void call_name_sym_fns(struct name_sym_fn_list
*list
, struct expression
*expr
, const char *name
, struct symbol
*sym
);
174 void call_string_hooks(struct string_hook_list
*list
, struct expression
*expr
, const char *str
);
176 struct allocation_info
{
178 const char *size_str
;
179 struct expression
*total_size
;
180 struct expression
*nr_elems
;
181 struct expression
*elem_size
;
184 bool safe
; /* safe from overflows */
186 typedef void (alloc_hook
)(struct expression
*expr
, const char *name
, struct symbol
*sym
, struct allocation_info
*info
);
187 void add_allocation_hook(alloc_hook
*func
);
189 void add_hook(void *func
, enum hook_type type
);
190 typedef struct smatch_state
*(merge_func_t
)(struct smatch_state
*s1
, struct smatch_state
*s2
);
191 typedef struct smatch_state
*(unmatched_func_t
)(struct sm_state
*state
);
192 void add_merge_hook(int client_id
, merge_func_t
*func
);
193 void add_unmatched_state_hook(int client_id
, unmatched_func_t
*func
);
194 void add_pre_merge_hook(int client_id
, void (*hook
)(struct sm_state
*cur
, struct sm_state
*other
));
195 typedef void (scope_hook
)(void *data
);
196 void add_scope_hook(scope_hook
*hook
, void *data
);
197 void add_return_string_hook(string_hook
*fn
);
198 typedef void (param_key_hook
)(struct expression
*expr
, const char *name
, struct symbol
*sym
, void *data
);
199 typedef void (func_hook
)(const char *fn
, struct expression
*expr
, void *data
);
200 typedef void (implication_hook
)(const char *fn
, struct expression
*call_expr
,
201 struct expression
*assign_expr
, void *data
);
202 typedef void (return_implies_hook
)(struct expression
*call_expr
,
203 int param
, char *key
, char *value
);
204 typedef int (implied_return_hook
)(struct expression
*call_expr
, void *info
, struct range_list
**rl
);
205 void add_function_hook(const char *look_for
, func_hook
*call_back
, void *data
);
206 void add_function_hook_late(const char *look_for
, func_hook
*call_back
, void *info
);
208 void add_function_assign_hook(const char *look_for
, func_hook
*call_back
,
210 void register_func_hooks_from_file(const char *file
,
211 func_hook
*call_back
, void *info
);
212 void register_assign_hooks_from_file(const char *file
,
213 func_hook
*call_back
, void *info
);
214 void add_implied_return_hook(const char *look_for
,
215 implied_return_hook
*call_back
,
217 void add_macro_assign_hook(const char *look_for
, func_hook
*call_back
,
219 void add_macro_assign_hook_extra(const char *look_for
, func_hook
*call_back
,
221 void return_implies_state(const char *look_for
, long long start
, long long end
,
222 implication_hook
*call_back
, void *info
);
223 void return_implies_state_sval(const char *look_for
, sval_t start
, sval_t end
,
224 implication_hook
*call_back
, void *info
);
225 void return_implies_exact(const char *look_for
, sval_t start
, sval_t end
,
226 implication_hook
*call_back
, void *info
);
227 struct range_list
*get_range_implications(const char *fn
);
228 void select_return_states_hook(int type
, return_implies_hook
*callback
);
229 void select_return_states_before(void (*fn
)(void));
230 void select_return_states_after(void (*fn
)(void));
231 void add_function_param_key_hook(const char *look_for
, param_key_hook
*call_back
,
232 int param
, const char *key
, void *info
);
233 void add_function_param_key_hook_late(const char *look_for
, param_key_hook
*call_back
,
234 int param
, const char *key
, void *info
);
235 void return_implies_param_key(const char *look_for
, sval_t start
, sval_t end
,
236 param_key_hook
*call_back
,
237 int param
, const char *key
, void *info
);
238 void return_implies_param_key_exact(const char *look_for
, sval_t start
, sval_t end
,
239 param_key_hook
*call_back
,
240 int param
, const char *key
, void *info
);
241 void select_return_param_key(int type
, param_key_hook
*callback
);
242 bool get_implied_return(struct expression
*expr
, struct range_list
**rl
);
243 void allocate_hook_memory(void);
244 void allocate_tracker_array(int num_checks
);
246 struct modification_data
{
247 struct smatch_state
*prev
;
248 struct expression
*cur
;
251 void allocate_modification_hooks(void);
252 bool is_sub_member(const char *name
, struct symbol
*sym
, struct sm_state
*sm
);
253 void add_all_modifications_hook(int owner
, name_sym_hook
*hook
);
254 void add_modification_hook(int owner
, sm_hook
*call_back
);
255 void add_modification_hook_late(int owner
, sm_hook
*call_back
);
256 struct smatch_state
*get_modification_state(struct expression
*expr
);
258 int outside_of_function(void);
259 const char *get_filename(void);
260 extern int base_file_stream
;
261 const char *get_base_file(void);
262 unsigned long long get_file_id(void);
263 unsigned long long get_base_file_id(void);
264 char *get_function(void);
265 extern int __smatch_lineno
;
266 int get_lineno(void);
267 extern int final_pass
;
268 extern struct symbol
*cur_func_sym
;
269 extern int option_debug
;
270 extern int local_debug
;
272 extern bool implied_debug
;
273 bool debug_implied(void);
274 bool debug_on(const char *check_name
, const char *var
);
275 extern int option_info
;
276 extern int option_spammy
;
277 extern int option_pedantic
;
278 extern int option_print_names
;
279 extern char *trace_variable
;
280 extern struct stree
*global_states
;
281 void set_function_skipped(void);
282 int is_skipped_function(void);
283 int is_silenced_function(void);
284 extern bool implications_off
;
286 /* smatch_impossible.c */
287 int is_impossible_path(void);
288 void set_true_path_impossible(void);
289 void set_false_path_impossible(void);
290 void set_path_impossible(void);
292 extern FILE *sm_outfd
;
293 extern FILE *sql_outfd
;
294 extern FILE *caller_info_fd
;
295 extern int sm_nr_checks
;
296 extern int sm_nr_errors
;
299 * How to use these routines:
301 * sm_fatal(): an internal error of some kind that should immediately exit
302 * sm_ierror(): an internal error
303 * sm_perror(): an internal error from parsing input source
304 * sm_error(): an error from input source
305 * sm_warning(): a warning from input source
306 * sm_info(): info message (from option_info)
307 * sm_debug(): debug message
308 * sm_msg(): other message (please avoid using this)
311 #define sm_printf(msg...) do { \
312 if (final_pass || option_debug || local_debug || debug_db) \
313 fprintf(sm_outfd, msg); \
316 static inline void sm_prefix(void)
318 sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
319 if (option_info
|| !option_print_names
)
321 sm_printf("[smatch.%s] ", __CHECKNAME__
);
324 static inline void print_implied_debug_msg();
326 extern bool __silence_warnings_for_stmt
;
328 #define sm_print_msg(type, msg...) \
330 print_implied_debug_msg(); \
331 if (!final_pass && !option_debug && !local_debug && !debug_db) \
333 if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
335 if (!option_info && is_silenced_function()) \
339 sm_printf("warn: "); \
341 } else if (type == 2) { \
342 sm_printf("error: "); \
344 } else if (type == 3) { \
345 sm_printf("parse error: "); \
347 } else if (type == 4) { \
348 sm_printf("pedantic: "); \
354 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
356 extern char *implied_debug_msg
;
357 static inline void print_implied_debug_msg(void)
359 static struct symbol
*last_printed
= NULL
;
361 if (!implied_debug_msg
)
363 if (last_printed
== cur_func_sym
)
365 last_printed
= cur_func_sym
;
366 sm_msg("%s", implied_debug_msg
);
369 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
370 #define db_debug(msg...) do { if (option_debug || debug_db) sm_printf(msg); } while (0)
372 #define sm_info(msg...) do { \
373 if (option_debug || (option_info && final_pass)) { \
375 sm_printf("info: "); \
381 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
382 #define sm_warning_line(line, msg...) do { \
383 int __orig = __smatch_lineno; \
384 __smatch_lineno = line; \
385 sm_print_msg(1, msg); \
386 __smatch_lineno = __orig; \
388 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
389 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
390 #define sm_pedantic(msg...) do { if (option_pedantic) sm_print_msg(4, msg); } while (0)
392 static inline void sm_fatal(const char *fmt
, ...)
397 vfprintf(sm_outfd
, fmt
, args
);
400 fprintf(sm_outfd
, "\n");
405 static inline void sm_ierror(const char *fmt
, ...)
411 fprintf(sm_outfd
, "internal error: ");
414 vfprintf(sm_outfd
, fmt
, args
);
417 fprintf(sm_outfd
, "\n");
419 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
421 bool has_states(struct stree
*stree
, int owner
);
422 struct smatch_state
*__get_state(int owner
, const char *name
, struct symbol
*sym
);
423 struct smatch_state
*get_state(int owner
, const char *name
, struct symbol
*sym
);
424 struct smatch_state
*get_state_expr(int owner
, struct expression
*expr
);
425 bool has_possible_state(int owner
, const char *name
, struct symbol
*sym
, struct smatch_state
*state
);
426 bool expr_has_possible_state(int owner
, struct expression
*expr
, struct smatch_state
*state
);
427 struct state_list
*get_possible_states(int owner
, const char *name
,
429 struct state_list
*get_possible_states_expr(int owner
, struct expression
*expr
);
430 struct sm_state
*set_state(int owner
, const char *name
, struct symbol
*sym
,
431 struct smatch_state
*state
);
432 struct sm_state
*set_state_expr(int owner
, struct expression
*expr
,
433 struct smatch_state
*state
);
434 void __delete_state(int owner
, const char *name
, struct symbol
*sym
);
435 void __delete_all_states_sym(struct symbol
*sym
);
436 void set_true_false_states(int owner
, const char *name
, struct symbol
*sym
,
437 struct smatch_state
*true_state
,
438 struct smatch_state
*false_state
);
439 void set_true_false_states_expr(int owner
, struct expression
*expr
,
440 struct smatch_state
*true_state
,
441 struct smatch_state
*false_state
);
443 struct stree
*get_all_states_from_stree(int owner
, struct stree
*source
);
444 struct stree
*get_all_states_stree(int id
);
445 struct stree
*__get_cur_stree(void);
446 int is_reachable(void);
447 void add_get_state_hook(void (*fn
)(int owner
, const char *name
, struct symbol
*sym
));
450 char *ssa_name(const char *name
);
451 void set_ssa_state(int owner
, const char *name
, struct symbol
*sym
, struct smatch_state
*state
);
452 void update_ssa_state(int owner
, const char *name
, struct symbol
*sym
,
453 struct smatch_state
*state
);
454 void update_ssa_sm(int owner
, struct sm_state
*sm
, struct smatch_state
*state
);
455 void set_ssa_state_expr(int owner
, struct expression
*expr
, struct smatch_state
*state
);
456 struct sm_state
*get_ssa_sm_state(int owner
, const char *name
, struct symbol
*sym
);
457 struct sm_state
*get_ssa_sm_state_expr(int owner
, struct expression
*expr
);
458 struct smatch_state
*get_ssa_state(int owner
, const char *name
, struct symbol
*sym
);
459 struct smatch_state
*get_ssa_state_expr(int owner
, struct expression
*expr
);
461 /* smatch_helper.c */
462 DECLARE_PTR_LIST(int_stack
, int);
463 char *alloc_string(const char *str
);
464 char *alloc_string_newline(const char *str
);
465 void free_string(char *str
);
466 void remove_parens(char *str
);
467 struct smatch_state
*alloc_state_num(int num
);
468 struct smatch_state
*alloc_state_str(const char *name
);
469 struct smatch_state
*merge_str_state(struct smatch_state
*s1
, struct smatch_state
*s2
);
470 struct smatch_state
*alloc_state_expr(struct expression
*expr
);
471 struct expression
*get_assigned_call(struct expression
*expr
);
472 struct expression
*get_argument_from_call_expr(struct expression_list
*args
,
474 struct expression
*get_array_expr(struct expression
*expr
);
476 char *expr_to_var(struct expression
*expr
);
477 struct symbol
*expr_to_sym(struct expression
*expr
);
478 char *expr_to_str(struct expression
*expr
);
479 char *expr_to_str_sym(struct expression
*expr
,
480 struct symbol
**sym_ptr
);
481 char *expr_to_var_sym(struct expression
*expr
,
482 struct symbol
**sym_ptr
);
483 char *expr_to_known_chunk_sym(struct expression
*expr
, struct symbol
**sym
);
484 char *expr_to_chunk_sym_vsl(struct expression
*expr
, struct symbol
**sym
, struct var_sym_list
**vsl
);
485 int get_complication_score(struct expression
*expr
);
487 int sym_name_is(const char *name
, struct expression
*expr
);
488 int get_const_value(struct expression
*expr
, sval_t
*sval
);
489 int get_value(struct expression
*expr
, sval_t
*val
);
490 int get_implied_value(struct expression
*expr
, sval_t
*val
);
491 int get_implied_value_fast(struct expression
*expr
, sval_t
*sval
);
492 int get_implied_min(struct expression
*expr
, sval_t
*sval
);
493 int get_implied_max(struct expression
*expr
, sval_t
*val
);
494 int get_hard_max(struct expression
*expr
, sval_t
*sval
);
495 int get_fuzzy_min(struct expression
*expr
, sval_t
*min
);
496 int get_fuzzy_max(struct expression
*expr
, sval_t
*max
);
497 int get_absolute_min(struct expression
*expr
, sval_t
*sval
);
498 int get_absolute_max(struct expression
*expr
, sval_t
*sval
);
499 int parse_call_math(struct expression
*expr
, char *math
, sval_t
*val
);
500 int parse_call_math_rl(struct expression
*call
, const char *math
, struct range_list
**rl
);
501 const char *get_allocation_math(struct expression
*expr
);
502 char *get_value_in_terms_of_parameter_math(struct expression
*expr
);
503 char *get_value_in_terms_of_parameter_math_var_sym(const char *var
, struct symbol
*sym
);
504 int expr_is_zero(struct expression
*expr
);
505 int known_condition_true(struct expression
*expr
);
506 int known_condition_false(struct expression
*expr
);
507 int implied_condition_true(struct expression
*expr
);
508 int implied_condition_false(struct expression
*expr
);
509 int can_integer_overflow(struct symbol
*type
, struct expression
*expr
);
510 void clear_math_cache(void);
511 void set_fast_math_only(void);
512 void clear_fast_math_only(void);
514 int is_array(struct expression
*expr
);
515 struct expression
*get_array_base(struct expression
*expr
);
516 struct expression
*get_array_offset(struct expression
*expr
);
517 const char *show_state(struct smatch_state
*state
);
518 struct statement
*get_expression_statement(struct expression
*expr
);
519 struct expression
*strip__builtin_choose_expr(struct expression
*expr
);
520 struct expression
*strip_Generic(struct expression
*expr
);
521 struct expression
*strip_parens(struct expression
*expr
);
522 struct expression
*strip_expr(struct expression
*expr
);
523 struct expression
*strip_no_cast(struct expression
*expr
);
524 struct expression
*strip_expr_set_parent(struct expression
*expr
);
525 void scoped_state(int my_id
, const char *name
, struct symbol
*sym
);
526 int is_error_return(struct expression
*expr
);
527 int getting_address(struct expression
*expr
);
528 int get_struct_and_member(struct expression
*expr
, const char **type
, const char **member
);
529 char *get_member_name(struct expression
*expr
);
530 char *get_fnptr_name(struct expression
*expr
);
531 int cmp_pos(struct position pos1
, struct position pos2
);
532 int positions_eq(struct position pos1
, struct position pos2
);
533 struct statement
*get_current_statement(void);
534 struct statement
*get_prev_statement(void);
535 struct expression
*get_last_expr_from_expression_stmt(struct expression
*expr
);
537 enum { RET_SUCCESS
, RET_FAIL
, RET_UNKNOWN
};
538 int success_fail_return(struct range_list
*rl
);
540 #define RETURN_VAR -1
541 #define LOCAL_SCOPE -2
542 #define FILE_SCOPE -3
543 #define GLOBAL_SCOPE -4
544 #define UNKNOWN_SCOPE -5
546 char *swap_names(const char *orig
, const char *remove
, const char *add
);
547 char *get_param_var_sym_var_sym(const char *name
, struct symbol
*sym
, struct expression
*ret_expr
, struct symbol
**sym_p
);
548 char *get_param_name_sym(struct expression
*expr
, struct symbol
**sym_p
);
549 int get_param_key_from_var_sym(const char *name
, struct symbol
*sym
,
550 struct expression
*ret_expr
,
552 int get_param_key_from_sm(struct sm_state
*sm
, struct expression
*ret_expr
,
554 int get_param_key_from_expr(struct expression
*expr
, struct expression
*ret_expr
,
556 const char *get_param_key_swap_dollar(struct expression
*expr
);
557 int map_to_param(const char *name
, struct symbol
*sym
);
558 int get_param_num_from_sym(struct symbol
*sym
);
559 int get_param_num(struct expression
*expr
);
560 struct symbol
*get_param_sym_from_num(int num
);
561 struct expression
*map_container_of_to_simpler_expr_key(struct expression
*expr
, const char *orig_key
, char **new_key
);
562 const char *get_container_of_str(struct expression
*expr
);
563 bool get_offset_param(const char *ret_str
, int *offset
, int *param
);
564 /* smatch_points_to_container.c */
565 struct expression
*get_stored_container(struct expression
*expr
, int offset
);
567 int ms_since(struct timeval
*start
);
568 int parent_is_gone_var_sym(const char *name
, struct symbol
*sym
);
569 int parent_is_gone(struct expression
*expr
);
570 bool is_noderef_ptr(struct expression
*expr
);
571 int invert_op(int op
);
572 int op_remove_assign(int op
);
573 int expr_equiv(struct expression
*one
, struct expression
*two
);
574 void push_int(struct int_stack
**stack
, int num
);
575 int pop_int(struct int_stack
**stack
);
576 bool macro_to_ul(const char *macro
, unsigned long *val
);
579 struct symbol
*get_real_base_type(struct symbol
*sym
);
580 int type_bytes(struct symbol
*type
);
581 int array_bytes(struct symbol
*type
);
582 struct symbol
*get_pointer_type(struct expression
*expr
);
583 struct symbol
*get_type(struct expression
*expr
);
584 struct symbol
*get_comparison_type(struct expression
*expr
);
585 struct symbol
*get_final_type(struct expression
*expr
);
586 struct symbol
*get_promoted_type(struct symbol
*left
, struct symbol
*right
);
587 int type_signed(struct symbol
*base_type
);
588 int expr_unsigned(struct expression
*expr
);
589 int expr_signed(struct expression
*expr
);
590 int returns_unsigned(struct symbol
*base_type
);
591 int is_pointer(struct expression
*expr
);
592 bool is_void_ptr(struct symbol
*type
);
593 int returns_pointer(struct symbol
*base_type
);
594 sval_t
sval_type_max(struct symbol
*base_type
);
595 sval_t
sval_type_min(struct symbol
*base_type
);
596 int nr_bits(struct expression
*expr
);
597 int is_void_pointer(struct expression
*expr
);
598 int is_char_pointer(struct expression
*expr
);
599 int is_string(struct expression
*expr
);
600 bool is_struct_ptr(struct symbol
*type
);
601 int is_static(struct expression
*expr
);
602 bool is_local_variable(struct expression
*expr
);
603 int types_equiv(struct symbol
*one
, struct symbol
*two
);
604 bool type_fits(struct symbol
*type
, struct symbol
*test
);
606 const char *global_static();
607 struct symbol
*cur_func_return_type(void);
608 struct symbol
*get_arg_type(struct expression
*fn
, int arg
);
609 struct symbol
*get_member_type_from_key(struct expression
*expr
, const char *key
);
610 struct symbol
*get_arg_type_from_key(struct expression
*fn
, int param
, struct expression
*arg
, const char *key
);
611 int is_struct(struct expression
*expr
);
612 char *type_to_str(struct symbol
*type
);
614 /* smatch_ignore.c */
615 void add_ignore(int owner
, const char *name
, struct symbol
*sym
);
616 int is_ignored(int owner
, const char *name
, struct symbol
*sym
);
617 void add_ignore_expr(int owner
, struct expression
*expr
);
618 int is_ignored_expr(int owner
, struct expression
*expr
);
621 struct smatch_state
*alloc_var_sym_state(const char *var
, struct symbol
*sym
);
622 struct var_sym
*alloc_var_sym(const char *var
, struct symbol
*sym
);
623 struct var_sym_list
*expr_to_vsl(struct expression
*expr
);
624 void add_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
625 void add_var_sym_expr(struct var_sym_list
**list
, struct expression
*expr
);
626 void del_var_sym(struct var_sym_list
**list
, const char *var
, struct symbol
*sym
);
627 int in_var_sym_list(struct var_sym_list
*list
, const char *var
, struct symbol
*sym
);
628 struct var_sym_list
*clone_var_sym_list(struct var_sym_list
*from_vsl
);
629 void merge_var_sym_list(struct var_sym_list
**dest
, struct var_sym_list
*src
);
630 struct var_sym_list
*combine_var_sym_lists(struct var_sym_list
*one
, struct var_sym_list
*two
);
631 int var_sym_lists_equiv(struct var_sym_list
*one
, struct var_sym_list
*two
);
632 void free_var_sym_list(struct var_sym_list
**list
);
633 void free_var_syms_and_list(struct var_sym_list
**list
);
636 struct tracker
*alloc_tracker(int owner
, const char *name
, struct symbol
*sym
);
637 void add_tracker(struct tracker_list
**list
, int owner
, const char *name
,
639 void add_tracker_expr(struct tracker_list
**list
, int owner
, struct expression
*expr
);
640 void del_tracker(struct tracker_list
**list
, int owner
, const char *name
,
642 int in_tracker_list(struct tracker_list
*list
, int owner
, const char *name
,
644 void free_tracker_list(struct tracker_list
**list
);
645 void free_trackers_and_list(struct tracker_list
**list
);
647 /* smatch_conditions */
648 int in_condition(void);
652 extern int __in_fake_assign
;
653 extern int __in_fake_parameter_assign
;
654 extern int __in_fake_struct_assign
;
655 extern int __in_fake_var_assign
;
656 extern int __in_builtin_overflow_func
;
657 extern int __fake_state_cnt
;
658 extern int in_fake_env
;
659 bool is_fake_var_assign(struct expression
*expr
);
660 void smatch (struct string_list
*filelist
);
661 int inside_loop(void);
662 int definitely_inside_loop(void);
663 struct expression
*get_switch_expr(void);
664 int in_expression_statement(void);
665 void __process_post_op_stack(void);
666 void __split_expr(struct expression
*expr
);
667 void __split_label_stmt(struct statement
*stmt
);
668 void __split_stmt(struct statement
*stmt
);
669 extern int __in_function_def
;
670 extern int __in_unmatched_hook
;
671 extern int option_assume_loops
;
672 extern int option_two_passes
;
673 extern int option_no_db
;
674 extern int option_file_output
;
675 extern int option_time
;
676 extern int option_time_stmt
;
677 extern struct expression_list
*big_expression_stack
;
678 extern struct expression_list
*big_condition_stack
;
679 extern struct statement_list
*big_statement_stack
;
680 int is_condition_call(struct expression
*expr
);
681 int is_assigned_call(struct expression
*expr
);
682 int is_fake_assigned_call(struct expression
*expr
);
683 void add_function_data(unsigned long *fn_data
);
684 int inlinable(struct expression
*expr
);
685 extern int __inline_call
;
686 extern struct expression
*__inline_fn
;
687 extern int __in_pre_condition
;
688 extern int __bail_on_rest_of_function
;
689 extern struct statement
*__prev_stmt
;
690 extern struct statement
*__cur_stmt
;
691 extern struct statement
*__next_stmt
;
692 void init_fake_env(void);
693 void end_fake_env(void);
694 int time_parsing_function(void);
695 bool taking_too_long(void);
696 struct statement
*get_last_stmt(void);
697 int is_last_stmt(struct statement
*cur_stmt
);
699 /* smatch_struct_assignment.c */
700 struct expression
*get_faked_expression(void);
701 void __fake_struct_member_assignments(struct expression
*expr
);
703 /* smatch_project.c */
704 int is_no_inline_function(const char *function
);
706 /* smatch_conditions */
707 void __split_whole_condition(struct expression
*expr
);
708 void __handle_logic(struct expression
*expr
);
709 int is_condition(struct expression
*expr
);
710 int __handle_condition_assigns(struct expression
*expr
);
711 int __handle_select_assigns(struct expression
*expr
);
712 int __handle_expr_statement_assigns(struct expression
*expr
);
714 /* smatch_implied.c */
715 struct range_list_stack
;
716 void param_limit_implications(struct expression
*expr
, int param
, char *key
, char *value
, struct stree
**implied
);
717 struct stree
*__implied_case_stree(struct expression
*switch_expr
,
718 struct range_list
*case_rl
,
719 struct range_list_stack
**remaining_cases
,
720 struct stree
**raw_stree
);
721 void overwrite_states_using_pool(struct sm_state
*gate_sm
, struct sm_state
*pool_sm
);
722 int assume(struct expression
*expr
);
723 void end_assume(void);
724 int impossible_assumption(struct expression
*left
, int op
, sval_t sval
);
727 bool has_dynamic_states(unsigned short owner
);
728 void set_dynamic_states(unsigned short owner
);
730 /* smatch_extras.c */
731 int in_warn_on_macro(void);
732 extern int SMATCH_EXTRA
;
733 extern int RETURN_ID
;
740 char *get_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
741 char *map_call_to_other_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
);
742 char *map_long_to_short_name_sym(const char *name
, struct symbol
*sym
, struct symbol
**new_sym
, bool use_stack
);
744 #define STRLEN_MAX_RET 1010101
746 /* smatch_absolute.c */
747 int get_absolute_min_helper(struct expression
*expr
, sval_t
*sval
);
748 int get_absolute_max_helper(struct expression
*expr
, sval_t
*sval
);
750 /* smatch_type_value.c */
751 void disable_type_val_lookups(void);
752 void enable_type_val_lookups(void);
753 void clear_type_value_cache(void);
754 int get_db_type_rl(struct expression
*expr
, struct range_list
**rl
);
756 /* smatch_data_val.c */
757 int get_mtag_rl(struct expression
*expr
, struct range_list
**rl
);
758 /* smatch_array_values.c */
759 void clear_array_values_cache(void);
760 int get_array_rl(struct expression
*expr
, struct range_list
**rl
);
762 /* smatch_states.c */
763 struct stree
*__swap_cur_stree(struct stree
*stree
);
764 void __push_fake_cur_stree();
765 struct stree
*__pop_fake_cur_stree();
766 void __free_fake_cur_stree();
767 void __set_fake_cur_stree_fast(struct stree
*stree
);
768 void __pop_fake_cur_stree_fast(void);
769 void __merge_stree_into_cur(struct stree
*stree
);
771 int unreachable(void);
772 void __set_cur_stree_readonly(void);
773 void __set_cur_stree_writable(void);
774 void __set_sm(struct sm_state
*sm
);
775 void __set_sm_cur_stree(struct sm_state
*sm
);
776 void __set_true_false_sm(struct sm_state
*true_state
,
777 struct sm_state
*false_state
);
778 void nullify_path(void);
779 void __match_nullify_path_hook(const char *fn
, struct expression
*expr
,
781 void __unnullify_path(void);
782 int __path_is_null(void);
783 void save_all_states(void);
784 void restore_all_states(void);
785 void free_goto_stack(void);
786 void clear_all_states(void);
788 struct sm_state
*get_sm_state(int owner
, const char *name
,
790 struct sm_state
*get_sm_state_expr(int owner
, struct expression
*expr
);
791 void __push_true_states(void);
792 void __use_false_states(void);
793 void __discard_false_states(void);
794 void __merge_false_states(void);
795 void __merge_true_states(void);
797 void __negate_cond_stacks(void);
798 void __use_pre_cond_states(void);
799 void __use_cond_true_states(void);
800 void __use_cond_false_states(void);
801 void __push_cond_stacks(void);
802 void __fold_in_set_states(void);
803 void __free_set_states(void);
804 struct stree
*__copy_cond_true_states(void);
805 struct stree
*__copy_cond_false_states(void);
806 struct stree
*__pop_cond_true_stack(void);
807 struct stree
*__pop_cond_false_stack(void);
808 void __and_cond_states(void);
809 void __or_cond_states(void);
810 void __save_pre_cond_states(void);
811 void __discard_pre_cond_states(void);
812 struct stree
*__get_true_states(void);
813 struct stree
*__get_false_states(void);
814 void __use_cond_states(void);
815 extern struct state_list
*__last_base_slist
;
817 void __push_continues(void);
818 void __discard_continues(void);
819 void __process_continues(void);
820 void __merge_continues(void);
822 void __push_breaks(void);
823 void __process_breaks(void);
824 int __has_breaks(void);
825 void __merge_breaks(void);
826 void __use_breaks(void);
828 void __save_switch_states(struct expression
*switch_expr
);
829 void __discard_switches(void);
830 int have_remaining_cases(void);
831 void __merge_switches(struct expression
*switch_expr
, struct range_list
*case_rl
);
832 void __push_default(void);
833 void __set_default(void);
834 bool __has_default_case(void);
835 int __pop_default(void);
837 void __push_conditions(void);
838 void __discard_conditions(void);
840 void __save_gotos(const char *name
, struct symbol
*sym
);
841 void __merge_gotos(const char *name
, struct symbol
*sym
);
843 void __discard_fake_states(struct expression
*call
);
845 void __print_cur_stree(void);
846 bool __print_states(const char *owner
);
847 typedef void (check_tracker_hook
)(int owner
, const char *name
, struct symbol
*sym
, struct smatch_state
*state
);
848 void add_check_tracker(const char *check_name
, check_tracker_hook
*fn
);
851 void __pass_to_client(void *data
, enum hook_type type
);
852 void __pass_case_to_client(struct expression
*switch_expr
,
853 struct range_list
*rl
);
854 int __has_merge_function(int client_id
);
855 struct smatch_state
*__client_merge_function(int owner
,
856 struct smatch_state
*s1
,
857 struct smatch_state
*s2
);
858 struct smatch_state
*__client_unmatched_state_function(struct sm_state
*sm
);
859 void call_pre_merge_hook(struct sm_state
*cur
, struct sm_state
*other
);
860 void __push_scope_hooks(void);
861 void __call_scope_hooks(void);
862 void add_array_initialized_hook(void (*hook
)(struct expression
*array
, int nr
));
863 void __call_array_initialized_hooks(struct expression
*array
, int nr
);
865 /* smatch_function_hooks.c */
866 void add_fake_call_after_return(struct expression
*call
);
867 void create_function_hook_hash(void);
868 void __match_initializer_call(struct symbol
*sym
);
870 struct expression
*get_unfaked_call(void);
871 void fake_param_assign_helper(struct expression
*call
, struct expression
*fake_assign
);
877 * Changing these numbers is a pain. Don't do it. If you ever use a
878 * number it can't be re-used right away so there may be gaps.
879 * We select these in order by type so if the order matters, then give
880 * it a number below 100-999,9000-9999 ranges. */
894 ABSOLUTE_LIMITS
= 1010,
908 UNTRACKED_PARAM
= 1023,
914 COMPARE_LIMIT
= 1028,
915 PARAM_COMPARE
= 1029,
918 CONSTRAINT_REQUIRED
= 1033,
929 POWER_OF_TWO_SET
= 1049,
935 NEGATIVE_ERROR
= 1057,
938 /* put random temporary stuff in the 7000-7999 range for testing */
940 HOST_DATA_SET
= 7017,
944 USER_DATA_SET
= 9017,
948 NO_OVERFLOW_SIMPLE
= 8019,
954 KNOWN_UNLOCKED
= 9025,
959 REFCOUNT_INIT
= 9025,
962 NO_SIDE_EFFECT
= 8025,
965 ARRAYSIZE_ARG
= 8033,
978 /* Do not use numbers above 100k */
981 extern struct sqlite3
*smatch_db
;
982 extern struct sqlite3
*mem_db
;
983 extern struct sqlite3
*cache_db
;
985 bool db_incomplete(void);
986 void db_ignore_states(int id
);
987 typedef bool (delete_hook
)(struct expression
*expr
);
988 void add_delete_return_hook(delete_hook
*hook
);
989 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
);
990 void select_caller_name_sym(void (*fn
)(const char *name
, struct symbol
*sym
, char *value
), int type
);
991 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
));
992 void add_caller_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
));
993 void add_return_info_callback(int owner
,
994 void (*callback
)(int return_id
, char *return_ranges
,
995 struct expression
*returned_expr
,
997 const char *printed_name
,
998 struct sm_state
*sm
));
999 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
));
1000 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
));
1001 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
1002 void select_return_implies_hook_early(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
1003 void select_return_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
));
1004 struct range_list
*db_return_vals(struct expression
*expr
);
1005 struct range_list
*db_return_vals_from_str(const char *fn_name
);
1006 struct range_list
*db_return_vals_no_args(struct expression
*expr
);
1007 bool split_param_key(const char *value
, int *param
, char *key
, int len
);
1008 bool get_implied_rl_from_call_str(struct expression
*expr
, const char *data
, struct range_list
**rl
);
1009 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
);
1010 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
);
1011 char *get_name_sym_from_param_key(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
);
1012 char *get_param_name_var_sym(const char *name
, struct symbol
*sym
);
1013 char *get_param_name(struct sm_state
*sm
);
1014 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
);
1015 const char *get_mtag_name_expr(struct expression
*expr
);
1016 char *get_data_info_name(struct expression
*expr
);
1017 char *sm_to_arg_name(struct expression
*expr
, struct sm_state
*sm
);
1018 int is_recursive_member(const char *param_name
);
1020 char *escape_newlines(const char *str
);
1021 void sql_exec(struct sqlite3
*db
, int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
);
1023 #define sql_helper(db, call_back, data, sql...) \
1025 char sql_txt[1024]; \
1027 sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql); \
1028 db_debug("debug: %s\n", sql_txt); \
1029 sql_exec(db, call_back, data, sql_txt); \
1033 #define run_sql(call_back, data, sql...) \
1037 sql_helper(smatch_db, call_back, data, sql); \
1040 #define mem_sql(call_back, data, sql...) \
1041 sql_helper(mem_db, call_back, data, sql)
1043 #define cache_sql(call_back, data, sql...) \
1044 sql_helper(cache_db, call_back, data, sql)
1046 #define sql_insert_helper(table, db, ignore, late, values...) \
1048 struct sqlite3 *_db = db; \
1050 if (__inline_fn && !_db) \
1054 char *err, *p = buf; \
1057 p += snprintf(p, buf + sizeof(buf) - p, \
1058 "insert %sinto %s values (", \
1059 ignore ? "or ignore " : "", #table); \
1060 p += snprintf(p, buf + sizeof(buf) - p, values); \
1061 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
1062 db_debug("mem-db: %s\n", buf); \
1063 rc = sqlite3_exec(_db, buf, NULL, NULL, &err); \
1064 if (rc != SQLITE_OK) { \
1065 sm_ierror("SQL error #2: %s", err); \
1066 sm_ierror("SQL: '%s'", buf); \
1071 if (option_info) { \
1072 FILE *tmp_fd = sm_outfd; \
1073 sm_outfd = sql_outfd; \
1075 sm_printf("SQL%s: insert %sinto " #table " values(", \
1076 late ? "_late" : "", ignore ? "or ignore " : ""); \
1077 sm_printf(values); \
1078 sm_printf(");\n"); \
1079 sm_outfd = tmp_fd; \
1083 #define sql_insert(table, values...) sql_insert_helper(table, NULL, 0, 0, values);
1084 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, NULL, 1, 0, values);
1085 #define sql_insert_late(table, values...) sql_insert_helper(table, NULL, 0, 1, values);
1086 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1087 #define sql_insert_cache_or_ignore(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1089 char *get_static_filter(struct symbol
*sym
);
1091 void sql_insert_return_states(int return_id
, const char *return_ranges
,
1092 int type
, int param
, const char *key
, const char *value
);
1093 void sql_insert_caller_info(struct expression
*call
, int type
, int param
,
1094 const char *key
, const char *value
);
1095 void sql_insert_function_ptr(const char *fn
, const char *struct_name
);
1096 void sql_insert_return_values(const char *return_values
);
1097 void sql_insert_return_implies(int type
, int param
, const char *key
, const char *value
);
1098 void sql_insert_function_type_size(const char *member
, const char *ranges
);
1099 void sql_insert_function_type_info(int type
, const char *struct_type
, const char *member
, const char *value
);
1100 void sql_insert_type_info(int type
, const char *member
, const char *value
);
1101 void sql_insert_local_values(const char *name
, const char *value
);
1102 void sql_insert_function_type_value(const char *type
, const char *value
);
1103 void sql_insert_function_type(int param
, const char *value
);
1104 void sql_insert_parameter_name(int param
, const char *value
);
1105 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
);
1106 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
);
1107 void sql_save_constraint(const char *con
);
1108 void sql_save_constraint_required(const char *data
, int op
, const char *limit
);
1109 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
);
1110 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
);
1111 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
);
1112 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
);
1113 void sql_insert_mtag_info(mtag_t tag
, int type
, const char *value
);
1114 void sql_insert_mtag_map(mtag_t container
, int container_offset
, mtag_t tag
, int tag_offset
);
1115 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
);
1116 int mtag_map_select_container(mtag_t tag
, int container_offset
, mtag_t
*container
);
1117 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
);
1118 struct smatch_state
*get_mtag_return(struct expression
*expr
, struct smatch_state
*state
);
1119 struct range_list
*swap_mtag_seed(struct expression
*expr
, struct range_list
*rl
);
1121 bool is_fn_ptr(struct expression
*fn
);
1122 void sql_select_return_states(const char *cols
, struct expression
*call
,
1123 int (*callback
)(void*, int, char**, char**), void *info
);
1124 void sql_select_call_implies(const char *cols
, struct expression
*call
,
1125 int (*callback
)(void*, int, char**, char**));
1127 void open_smatch_db(char *db_file
);
1129 /* smatch_files.c */
1130 int open_data_file(const char *filename
);
1131 int open_schema_file(const char *schema
);
1132 struct token
*get_tokens_file(const char *filename
);
1133 struct string_list
*load_strings_from_file(const char *project
, const char *filename
);
1136 extern char *option_debug_check
;
1137 extern char *option_debug_var
;
1138 extern char *option_project_str
;
1139 extern char *bin_dir
;
1140 extern char *data_dir
;
1141 extern int option_no_data
;
1142 extern int option_full_path
;
1143 extern int option_call_tree
;
1144 extern int num_checks
;
1150 PROJ_ILLUMOS_KERNEL
,
1154 extern enum project_type option_project
;
1155 const char *check_name(unsigned short id
);
1156 int id_from_name(const char *name
);
1159 /* smatch_buf_size.c */
1160 int bytes_to_elements(struct expression
*expr
, int bytes
);
1161 int get_array_size(struct expression
*expr
);
1162 int get_array_size_bytes(struct expression
*expr
);
1163 int get_array_size_bytes_min(struct expression
*expr
);
1164 int get_array_size_bytes_max(struct expression
*expr
);
1165 struct range_list
*get_array_size_bytes_rl(struct expression
*expr
);
1166 int get_real_array_size(struct expression
*expr
);
1167 int last_member_is_resizable(struct symbol
*type
);
1168 /* smatch_strlen.c */
1169 bool is_strlen(struct expression
*expr
);
1170 int get_implied_strlen(struct expression
*expr
, struct range_list
**rl
);
1171 int get_size_from_strlen(struct expression
*expr
);
1173 /* smatch_capped.c */
1174 int is_capped(struct expression
*expr
);
1175 int is_capped_var_sym(const char *name
, struct symbol
*sym
);
1177 /* smatch_kernel_user_data.c */
1178 int is_user_macro(struct expression
*expr
);
1179 int is_capped_user_data(struct expression
*expr
);
1180 int implied_user_data(struct expression
*expr
, struct range_list
**rl
);
1181 struct stree
*get_user_stree(void);
1182 int get_user_rl(struct expression
*expr
, struct range_list
**rl
);
1183 int is_user_rl(struct expression
*expr
);
1184 int get_user_rl_var_sym(const char *name
, struct symbol
*sym
, struct range_list
**rl
);
1185 bool user_rl_capped_var_sym(const char *name
, struct symbol
*sym
);
1186 bool user_rl_capped(struct expression
*expr
);
1187 struct range_list
*var_user_rl(struct expression
*expr
);
1188 bool we_pass_user_data(struct expression
*call
);
1189 /* smatch_points_to_user_data.c */
1190 bool is_user_data_fn(struct symbol
*fn
);
1191 bool is_skb_data(struct expression
*expr
);
1192 bool is_socket_stuff(struct symbol
*sym
);
1193 bool points_to_user_data(struct expression
*expr
);
1194 void set_points_to_user_data(struct expression
*expr
, bool is_new
);
1196 /* smatch_kernel_host_data.c */
1197 int is_host_macro(struct expression
*expr
);
1198 int get_host_data_fn_param(const char *fn
);
1199 int is_capped_host_data(struct expression
*expr
);
1200 int implied_host_data(struct expression
*expr
, struct range_list
**rl
);
1201 struct stree
*get_host_stree(void);
1202 int get_host_rl(struct expression
*expr
, struct range_list
**rl
);
1203 int is_host_rl(struct expression
*expr
);
1204 int get_host_rl_var_sym(const char *name
, struct symbol
*sym
, struct range_list
**rl
);
1205 bool host_rl_capped(struct expression
*expr
);
1206 struct range_list
*var_host_rl(struct expression
*expr
);
1207 bool we_pass_host_data(struct expression
*call
);
1208 /* smatch_points_to_host_data.c */
1209 bool is_host_data_fn(struct symbol
*fn
);
1210 bool points_to_host_data(struct expression
*expr
);
1211 void set_points_to_host_data(struct expression
*expr
, bool is_new
);
1212 bool is_fn_points_to_host_data(char* fn
);
1213 /* check_locking.c */
1214 void print_held_locks();
1216 void __preempt_add(void);
1217 void __preempt_sub(void);
1218 int get_preempt_cnt(void);
1219 void clear_preempt_cnt(void);
1220 bool function_decrements_preempt(void);
1221 void add_sleep_callback(expr_func
*fn
);
1222 unsigned long GFP_DIRECT_RECLAIM(void);
1223 unsigned long GFP_ATOMIC(void);
1225 /* check_assigned_expr.c */
1226 extern int check_assigned_expr_id
;
1227 struct expression
*get_assigned_expr(struct expression
*expr
);
1228 struct sm_state
*get_assigned_sm(struct expression
*expr
);
1229 struct expression
*get_assigned_expr_recurse(struct expression
*expr
);
1230 struct expression
*get_assigned_expr_name_sym(const char *name
, struct symbol
*sym
);
1231 struct expression
*get_assigned_expr_name_sym_recurse(const char *name
, struct symbol
*sym
);
1233 /* smatch_return_to_param.c */
1234 char *map_call_to_param_name_sym(struct expression
*expr
, struct symbol
**sym
);
1236 /* smatch_comparison.c */
1237 extern int comparison_id
;
1238 #define UNKNOWN_COMPARISON 0
1239 #define IMPOSSIBLE_COMPARISON -1
1240 struct compare_data
{
1241 /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1242 struct expression
*left
;
1243 const char *left_var
;
1244 struct var_sym_list
*left_vsl
;
1246 struct expression
*right
;
1247 const char *right_var
;
1248 struct var_sym_list
*right_vsl
;
1250 DECLARE_ALLOCATOR(compare_data
);
1251 struct smatch_state
*alloc_compare_state(
1252 struct expression
*left
,
1253 const char *left_var
, struct var_sym_list
*left_vsl
,
1255 struct expression
*right
,
1256 const char *right_var
, struct var_sym_list
*right_vsl
);
1257 int comparison_intersection(int orig
, int op
);
1258 int merge_comparisons(int one
, int two
);
1259 int combine_comparisons(int left_compare
, int right_compare
);
1260 int state_to_comparison(struct smatch_state
*state
);
1261 struct smatch_state
*merge_compare_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
1262 int get_comparison(struct expression
*left
, struct expression
*right
);
1263 int get_comparison_no_extra(struct expression
*a
, struct expression
*b
);
1264 int get_comparison_strings(const char *one
, const char *two
);
1265 int possible_comparison(struct expression
*a
, int comparison
, struct expression
*b
);
1266 struct state_list
*get_all_comparisons(struct expression
*expr
);
1267 struct state_list
*get_all_possible_equal_comparisons(struct expression
*expr
);
1268 void __add_comparison_info(struct expression
*expr
, struct expression
*call
, const char *range
);
1269 char *get_printed_param_name(struct expression
*call
, const char *param_name
, struct symbol
*param_sym
);
1270 char *name_sym_to_param_comparison(const char *name
, struct symbol
*sym
);
1271 char *expr_equal_to_param(struct expression
*expr
, int ignore
);
1272 char *expr_lte_to_param(struct expression
*expr
, int ignore
);
1273 char *expr_param_comparison(struct expression
*expr
, int ignore
);
1274 int flip_comparison(int op
);
1275 int negate_comparison(int op
);
1276 int remove_unsigned_from_comparison(int op
);
1277 int param_compare_limit_is_impossible(struct expression
*expr
, int left_param
, char *left_key
, char *value
);
1278 void filter_by_comparison(struct range_list
**rl
, int comparison
, struct range_list
*right
);
1279 void __compare_param_limit_hook(struct expression
*left_expr
, struct expression
*right_expr
,
1280 const char *state_name
,
1281 struct smatch_state
*true_state
, struct smatch_state
*false_state
);
1282 int impossibly_high_comparison(struct expression
*expr
);
1283 void add_comparison_var_sym(
1284 struct expression
*left_expr
,
1285 const char *left_name
, struct var_sym_list
*left_vsl
,
1287 struct expression
*right_expr
,
1288 const char *right_name
, struct var_sym_list
*right_vsl
,
1289 struct expression
*mod_expr
);
1292 sval_t
*sval_alloc(sval_t sval
);
1293 sval_t
*sval_alloc_permanent(sval_t sval
);
1294 sval_t
sval_blank(struct expression
*expr
);
1295 sval_t
sval_type_val(struct symbol
*type
, long long val
);
1296 sval_t
sval_type_fval(struct symbol
*type
, long double fval
);
1297 sval_t
sval_from_val(struct expression
*expr
, long long val
);
1298 sval_t
sval_from_fval(struct expression
*expr
, long double fval
);
1299 int sval_is_ptr(sval_t sval
);
1300 bool sval_is_fp(sval_t sval
);
1301 int sval_unsigned(sval_t sval
);
1302 int sval_signed(sval_t sval
);
1303 int sval_bits(sval_t sval
);
1304 int sval_bits_used(sval_t sval
);
1305 int sval_is_negative(sval_t sval
);
1306 int sval_is_positive(sval_t sval
);
1307 int sval_is_min(sval_t sval
);
1308 int sval_is_max(sval_t sval
);
1309 int sval_is_a_min(sval_t sval
);
1310 int sval_is_a_max(sval_t sval
);
1311 int sval_is_negative_min(sval_t sval
);
1312 int sval_cmp_t(struct symbol
*type
, sval_t one
, sval_t two
);
1313 int sval_cmp_val(sval_t one
, long long val
);
1314 sval_t
sval_min(sval_t one
, sval_t two
);
1315 sval_t
sval_min_nonneg(sval_t one
, sval_t two
);
1316 sval_t
sval_max(sval_t one
, sval_t two
);
1317 int sval_too_low(struct symbol
*type
, sval_t sval
);
1318 int sval_too_high(struct symbol
*type
, sval_t sval
);
1319 int sval_fits(struct symbol
*type
, sval_t sval
);
1320 sval_t
sval_cast(struct symbol
*type
, sval_t sval
);
1321 sval_t
sval_preop(sval_t sval
, int op
);
1322 sval_t
sval_binop(sval_t left
, int op
, sval_t right
);
1323 int sval_binop_overflows(sval_t left
, int op
, sval_t right
);
1324 int sval_binop_overflows_no_sign(sval_t left
, int op
, sval_t right
);
1325 int find_first_zero_bit(unsigned long long uvalue
);
1326 int sm_fls64(unsigned long long uvalue
);
1327 unsigned long long fls_mask(unsigned long long uvalue
);
1328 unsigned long long sval_fls_mask(sval_t sval
);
1329 const char *sval_to_str(sval_t sval
);
1330 const char *sval_to_str_or_err_ptr(sval_t sval
);
1331 const char *sval_to_numstr(sval_t sval
);
1332 sval_t
ll_to_sval(long long val
);
1334 /* smatch_string_list.c */
1335 int list_has_string(struct string_list
*str_list
, const char *str
);
1336 int insert_string(struct string_list
**str_list
, const char *str
);
1337 struct string_list
*clone_str_list(struct string_list
*orig
);
1338 struct string_list
*combine_string_lists(struct string_list
*one
, struct string_list
*two
);
1340 /* smatch_start_states.c */
1341 struct stree
*get_start_states(void);
1343 /* smatch_recurse.c */
1344 int recurse(struct expression
*expr
,
1345 int (func
)(struct expression
*expr
, void *p
),
1346 void *param
, int nr
);
1347 int has_symbol(struct expression
*expr
, struct symbol
*sym
);
1348 int has_variable(struct expression
*expr
, struct expression
*var
);
1349 int has_inc_dec(struct expression
*expr
);
1351 /* smatch_stored_conditions.c */
1352 struct smatch_state
*get_stored_condition(struct expression
*expr
);
1353 struct expression_list
*get_conditions(struct expression
*expr
);
1354 struct sm_state
*stored_condition_implication_hook(struct expression
*expr
,
1355 struct state_list
**true_stack
,
1356 struct state_list
**false_stack
);
1357 /* smatch_parsed_conditions.c */
1358 struct sm_state
*parsed_condition_implication_hook(struct expression
*expr
,
1359 struct state_list
**true_stack
,
1360 struct state_list
**false_stack
);
1361 /* smatch_comparison.c */
1362 struct sm_state
*comparison_implication_hook(struct expression
*expr
,
1363 struct state_list
**true_stack
,
1364 struct state_list
**false_stack
);
1366 /* check_string_len.c */
1367 int get_formatted_string_size(struct expression
*call
, int arg
);
1368 int get_formatted_string_min_size(struct expression
*call
, int arg
);
1370 /* smatch_param_set.c */
1371 int param_was_set(struct expression
*expr
);
1372 int param_was_set_var_sym(const char *name
, struct symbol
*sym
);
1373 void print_limited_param_set(int return_id
, char *return_ranges
, struct expression
*expr
);
1375 void __promote_sets_to_clears(int return_id
, char *return_ranges
, struct expression
*expr
);
1376 bool parent_was_PARAM_CLEAR(const char *name
, struct symbol
*sym
);
1377 bool parent_was_PARAM_CLEAR_ZERO(const char *name
, struct symbol
*sym
);
1379 /* smatch_param_filter.c */
1380 int param_has_filter_data(struct sm_state
*sm
);
1382 /* smatch_links.c */
1383 void set_up_link_functions(int id
, int linkid
);
1384 struct smatch_state
*merge_link_states(struct smatch_state
*s1
, struct smatch_state
*s2
);
1385 void store_link(int link_id
, const char *name
, struct symbol
*sym
, const char *link_name
, struct symbol
*link_sym
);
1387 /* check_buf_comparison */
1388 const char *limit_type_str(unsigned int limit_type
);
1389 struct expression
*get_size_variable(struct expression
*buf
, int *limit_type
);
1390 struct expression
*get_array_variable(struct expression
*size
);
1391 int buf_comparison_index_ok(struct expression
*expr
);
1392 bool buf_comp_has_bytes(struct expression
*buf
, struct expression
*var
);
1393 bool buf_comp2_has_bytes(struct expression
*buf_expr
, struct expression
*var
);
1395 /* smatch_untracked_param.c */
1396 void mark_untracked(struct expression
*expr
, int param
, const char *key
, const char *value
);
1397 void add_untracked_param_hook(void (func
)(struct expression
*call
, int param
));
1398 void add_lost_param_hook(void (func
)(struct expression
*call
, int param
));
1399 void mark_all_params_untracked(int return_id
, char *return_ranges
, struct expression
*expr
);
1400 /* smatch_untracked_var.c */
1401 bool is_untracked(struct expression
*expr
);
1403 /* smatch_strings.c */
1404 struct state_list
*get_strings(struct expression
*expr
);
1405 struct expression
*fake_string_from_mtag(mtag_t tag
);
1407 /* smatch_estate.c */
1408 int estate_get_single_value(struct smatch_state
*state
, sval_t
*sval
);
1410 /* smatch_address.c */
1411 int get_address_rl(struct expression
*expr
, struct range_list
**rl
);
1412 int get_member_offset(struct symbol
*type
, const char *member_name
);
1413 int get_member_offset_from_deref(struct expression
*expr
);
1415 /* for now this is in smatch_used_parameter.c */
1416 void __get_state_hook(int owner
, const char *name
, struct symbol
*sym
);
1417 extern int __ignore_param_used
;
1419 /* smatch_buf_comparison.c */
1420 int db_var_is_array_limit(struct expression
*array
, const char *name
, struct var_sym_list
*vsl
);
1422 struct range_list
*get_fs(void);
1424 struct stree
*get_all_return_states(void);
1425 struct stree_stack
*get_all_return_strees(void);
1426 int on_atomic_dec_path(void);
1427 int was_inced(const char *name
, struct symbol
*sym
);
1428 void set_refcount_inc(char *name
, struct symbol
*sym
);
1429 void set_refcount_dec(char *name
, struct symbol
*sym
);
1430 void add_refcount_init_hook(name_sym_hook
*hook
);
1431 void add_refcount_inc_hook(name_sym_hook
*hook
);
1432 void add_refcount_dec_hook(name_sym_hook
*hook
);
1434 /* smatch_constraints.c */
1435 char *get_constraint_str(struct expression
*expr
);
1436 struct constraint_list
*get_constraints(struct expression
*expr
);
1437 char *unmet_constraint(struct expression
*data
, struct expression
*offset
);
1438 char *get_required_constraint(const char *data_str
);
1440 /* smatch_container_of.c */
1441 int get_param_from_container_of(struct expression
*expr
);
1442 int get_offset_from_container_of(struct expression
*expr
);
1443 char *get_container_name(struct expression
*container
, struct expression
*expr
);
1446 unsigned long long str_to_llu_hash(const char *str
);
1447 mtag_t
str_to_mtag(const char *str
);
1448 int get_string_mtag(struct expression
*expr
, mtag_t
*tag
);
1449 int get_toplevel_mtag(struct symbol
*sym
, mtag_t
*tag
);
1450 int create_mtag_alias(mtag_t tag
, struct expression
*expr
, mtag_t
*new);
1451 int expr_to_mtag_offset(struct expression
*expr
, mtag_t
*tag
, int *offset
);
1452 void update_mtag_data(struct expression
*expr
, struct smatch_state
*state
);
1453 int get_mtag_sval(struct expression
*expr
, sval_t
*sval
);
1455 /* Trinity fuzzer stuff */
1456 const char *get_syscall_arg_type(struct symbol
*sym
);
1459 int binfo_equiv(struct bit_info
*one
, struct bit_info
*two
);
1460 struct bit_info
*alloc_bit_info(unsigned long long set
, unsigned long long possible
);
1461 struct smatch_state
*alloc_bstate(unsigned long long set
, unsigned long long possible
);
1462 struct smatch_state
*merge_bstates(struct smatch_state
*one_state
, struct smatch_state
*two_state
);
1464 /* smatch_param_bits_set.c */
1465 void __set_param_modified_helper(struct expression
*expr
, struct smatch_state
*state
);
1466 void __set_param_modified_helper_sym(const char *name
, struct symbol
*sym
,
1467 struct smatch_state
*state
);
1469 /* smatch_param_bits_clear.c */
1470 void __set_param_modified_helper_clear(struct expression
*expr
, struct smatch_state
*state
);
1471 void __set_param_modified_helper_sym_clear(const char *name
, struct symbol
*sym
,
1472 struct smatch_state
*state
);
1474 /* smatch_bit_info.c */
1475 struct bit_info
*rl_to_binfo(struct range_list
*rl
);
1476 struct bit_info
*get_bit_info(struct expression
*expr
);
1477 struct bit_info
*get_bit_info_var_sym(const char *name
, struct symbol
*sym
);
1479 /* smatch_mem_tracker.c */
1480 extern int option_mem
;
1481 unsigned long get_mem_kb(void);
1482 unsigned long get_max_memory(void);
1484 /* smatch_goto_tracker.c */
1485 struct sm_state
*get_goto_sm_state(void);
1487 /* check_is_nospec.c */
1488 bool is_nospec(struct expression
*expr
);
1489 long get_stmt_cnt(void);
1491 /* smatch_nul_terminator.c */
1492 bool is_nul_terminated_var_sym(const char *name
, struct symbol
*sym
);
1493 bool is_nul_terminated(struct expression
*expr
);
1494 /* check_kernel.c */
1495 bool is_ignored_kernel_data(const char *name
);
1496 int get_gfp_param(struct expression
*expr
);
1498 bool is_fresh_alloc_var_sym(const char *var
, struct symbol
*sym
);
1499 bool is_fresh_alloc(struct expression
*expr
);
1500 bool is_freed_var_sym(const char *name
, struct symbol
*sym
);
1501 void track_freed_param(struct expression
*expr
, struct smatch_state
*state
);
1502 void track_freed_param_var_sym(const char *name
, struct symbol
*sym
,
1503 struct smatch_state
*state
);
1504 bool is_part_of_condition(struct expression
*expr
);
1505 bool is_percent_p_print(struct expression
*expr
);
1507 void add_free_hook(name_sym_hook
*hook
);
1509 /* smatch_unconstant_macros.c */
1510 int is_unconstant_macro(struct expression
*expr
);
1512 /* smatch_assigned_state.c */
1513 void add_state_assigned_hook(int owner
, sm_hook
*call_back
);
1514 void add_ssa_state_assigned_hook(int owner
, sm_hook
*call_back
);
1516 static inline bool type_is_ptr(struct symbol
*type
)
1519 (type
->type
== SYM_PTR
||
1520 type
->type
== SYM_ARRAY
||
1521 type
->type
== SYM_FN
);
1524 static inline bool type_is_fp(struct symbol
*type
)
1527 (type
== &float_ctype
||
1528 type
== &double_ctype
||
1529 type
== &ldouble_ctype
);
1532 static inline int type_bits(struct symbol
*type
)
1536 if (type_is_ptr(type
))
1537 return bits_in_pointer
;
1538 if (!type
->examined
)
1539 examine_symbol_type(type
);
1540 return type
->bit_size
;
1543 static inline int type_unsigned(struct symbol
*base_type
)
1547 if (is_ptr_type(base_type
))
1549 if (base_type
->ctype
.modifiers
& MOD_UNSIGNED
)
1554 static inline int type_positive_bits(struct symbol
*type
)
1558 if (is_ptr_type(type
))
1559 return bits_in_pointer
;
1560 if (type_unsigned(type
))
1561 return type_bits(type
);
1562 return type_bits(type
) - 1;
1565 static inline int sval_positive_bits(sval_t sval
)
1567 return type_positive_bits(sval
.type
);
1571 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1574 static inline int fp_cmp(sval_t one
, sval_t two
)
1576 struct symbol
*type
;
1578 if (sval_is_fp(one
) && sval_is_fp(two
))
1579 type
= type_bits(one
.type
) > type_bits(two
.type
) ? one
.type
: two
.type
;
1580 else if (sval_is_fp(one
))
1585 one
= sval_cast(type
, one
);
1586 two
= sval_cast(type
, two
);
1588 if (one
.type
== &float_ctype
) {
1589 if (one
.fvalue
< two
.fvalue
)
1591 if (one
.fvalue
== two
.fvalue
)
1595 if (one
.type
== &double_ctype
) {
1596 if (one
.dvalue
< two
.dvalue
)
1598 if (one
.dvalue
== two
.dvalue
)
1602 if (one
.type
== &ldouble_ctype
) {
1603 if (one
.ldvalue
< two
.ldvalue
)
1605 if (one
.ldvalue
== two
.ldvalue
)
1609 sm_perror("bad type in fp_cmp(): %s", type_to_str(type
));
1613 static inline int sval_cmp(sval_t one
, sval_t two
)
1615 struct symbol
*type
;
1617 if (sval_is_fp(one
) || sval_is_fp(two
))
1618 return fp_cmp(one
, two
);
1621 if (sval_positive_bits(two
) > sval_positive_bits(one
))
1623 if (type_bits(type
) < 31)
1626 one
= sval_cast(type
, one
);
1627 two
= sval_cast(type
, two
);
1629 if (type_unsigned(type
)) {
1630 if (one
.uvalue
< two
.uvalue
)
1632 if (one
.uvalue
== two
.uvalue
)
1636 /* fix me handle type promotion and unsigned values */
1637 if (one
.value
< two
.value
)
1639 if (one
.value
== two
.value
)
1644 #endif /* !SMATCH_H_ */