1 /*
2 * Copyright (C) 2006 Dan Carpenter.
3 *
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.
8 *
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.
13 *
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
16 *
17 * Copyright 2019 Joyent, Inc.
18 */
19
20 #ifndef SMATCH_H_
21 # define SMATCH_H_
22
23 #include <stdio.h>
24 #include <string.h>
25 #include <limits.h>
26 #include <float.h>
27 #include <sys/time.h>
28 #include <sqlite3.h>
29 #include "lib.h"
30 #include "allocate.h"
31 #include "scope.h"
32 #include "parse.h"
33 #include "expression.h"
34 #include "avl.h"
35
36 typedef struct {
37 struct symbol *type;
38 union {
39 long long value;
40 unsigned long long uvalue;
41 float fvalue;
42 double dvalue;
43 long double ldvalue;
44 };
45 } sval_t;
46
47 typedef long long mtag_t;
48
49 struct smatch_state {
50 const char *name;
51 void *data;
52 };
53 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
54 extern struct smatch_state undefined;
55 extern struct smatch_state ghost;
56 extern struct smatch_state merged;
57 extern struct smatch_state true_state;
58 extern struct smatch_state false_state;
59 DECLARE_ALLOCATOR(smatch_state);
60
61 static inline void *INT_PTR(int i)
62 {
63 return (void *)(long)i;
64 }
65
66 static inline int PTR_INT(void *p)
67 {
68 return (int)(long)p;
69 }
70
71 struct tracker {
72 char *name;
73 struct symbol *sym;
74 unsigned short owner;
75 };
76 DECLARE_ALLOCATOR(tracker);
77 DECLARE_PTR_LIST(tracker_list, struct tracker);
78 DECLARE_PTR_LIST(stree_stack, struct stree);
79
80 /* The first 3 struct members must match struct tracker */
81 struct sm_state {
82 const char *name;
83 struct symbol *sym;
84 unsigned short owner;
85 unsigned short merged:1;
86 unsigned int line;
87 struct smatch_state *state;
88 struct stree *pool;
89 struct sm_state *left;
90 struct sm_state *right;
91 struct state_list *possible;
92 };
93
94 struct var_sym {
95 char *var;
96 struct symbol *sym;
97 };
98 DECLARE_ALLOCATOR(var_sym);
99 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
100
101 struct constraint {
102 int op;
103 int id;
104 };
105 DECLARE_PTR_LIST(constraint_list, struct constraint);
106
107 struct alloc_info {
108 const char *fn;
109 int size_param, nr;
110 };
111 extern struct alloc_info *alloc_funcs;
112
113 struct bit_info {
114 unsigned long long set;
115 unsigned long long possible;
116 };
117
118 enum hook_type {
119 EXPR_HOOK,
120 EXPR_HOOK_AFTER,
121 STMT_HOOK,
122 STMT_HOOK_AFTER,
123 SYM_HOOK,
124 STRING_HOOK,
125 DECLARATION_HOOK,
126 ASSIGNMENT_HOOK,
127 ASSIGNMENT_HOOK_AFTER,
128 RAW_ASSIGNMENT_HOOK,
129 GLOBAL_ASSIGNMENT_HOOK,
130 LOGIC_HOOK,
131 CONDITION_HOOK,
132 PRELOOP_HOOK,
133 SELECT_HOOK,
134 WHOLE_CONDITION_HOOK,
135 FUNCTION_CALL_HOOK_BEFORE,
136 FUNCTION_CALL_HOOK,
137 CALL_HOOK_AFTER_INLINE,
138 FUNCTION_CALL_HOOK_AFTER_DB,
139 CALL_ASSIGNMENT_HOOK,
140 MACRO_ASSIGNMENT_HOOK,
141 BINOP_HOOK,
142 OP_HOOK,
143 DEREF_HOOK,
144 CASE_HOOK,
145 ASM_HOOK,
146 CAST_HOOK,
147 SIZEOF_HOOK,
148 BASE_HOOK,
149 FUNC_DEF_HOOK,
150 AFTER_DEF_HOOK,
151 END_FUNC_HOOK,
152 AFTER_FUNC_HOOK,
153 RETURN_HOOK,
154 INLINE_FN_START,
155 INLINE_FN_END,
156 END_FILE_HOOK,
157 NUM_HOOKS,
158 };
159
160 #define TRUE 1
161 #define FALSE 0
162
163 struct range_list;
164
165 void add_hook(void *func, enum hook_type type);
166 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
167 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
168 void add_merge_hook(int client_id, merge_func_t *func);
169 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
170 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *cur, struct sm_state *other));
171 typedef void (scope_hook)(void *data);
172 void add_scope_hook(scope_hook *hook, void *data);
173 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
174 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
175 struct expression *assign_expr, void *data);
176 typedef void (return_implies_hook)(struct expression *call_expr,
177 int param, char *key, char *value);
178 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
179 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
180
181 void add_function_assign_hook(const char *look_for, func_hook *call_back,
182 void *info);
183 void add_implied_return_hook(const char *look_for,
184 implied_return_hook *call_back,
185 void *info);
186 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
187 void *info);
188 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
189 void *info);
190 void return_implies_state(const char *look_for, long long start, long long end,
191 implication_hook *call_back, void *info);
192 void return_implies_state_sval(const char *look_for, sval_t start, sval_t end,
193 implication_hook *call_back, void *info);
194 void select_return_states_hook(int type, return_implies_hook *callback);
195 void select_return_states_before(void (*fn)(void));
196 void select_return_states_after(void (*fn)(void));
197 int get_implied_return(struct expression *expr, struct range_list **rl);
198 void allocate_hook_memory(void);
199
200 struct modification_data {
201 struct smatch_state *prev;
202 struct expression *cur;
203 };
204
205 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
206 void add_modification_hook(int owner, modification_hook *call_back);
207 void add_modification_hook_late(int owner, modification_hook *call_back);
208 struct smatch_state *get_modification_state(struct expression *expr);
209
210 int outside_of_function(void);
211 const char *get_filename(void);
212 const char *get_base_file(void);
213 char *get_function(void);
214 int get_lineno(void);
215 extern int final_pass;
216 extern struct symbol *cur_func_sym;
217 extern int option_debug;
218 extern int local_debug;
219 extern int debug_db;
220 bool debug_implied(void);
221 extern int option_info;
222 extern int option_spammy;
223 extern int option_timeout;
224 extern char *trace_variable;
225 extern struct stree *global_states;
226 int is_skipped_function(void);
227 int is_silenced_function(void);
228 extern bool implications_off;
229
230 /* smatch_impossible.c */
231 int is_impossible_path(void);
232 void set_path_impossible(void);
233
234 extern FILE *sm_outfd;
235 extern FILE *sql_outfd;
236 extern FILE *caller_info_fd;
237 extern int sm_nr_checks;
238 extern int sm_nr_errors;
239 extern const char *progname;
240
241 /*
242 * How to use these routines:
243 *
244 * sm_fatal(): an internal error of some kind that should immediately exit
245 * sm_ierror(): an internal error
246 * sm_perror(): an internal error from parsing input source
247 * sm_error(): an error from input source
248 * sm_warning(): a warning from input source
249 * sm_info(): info message (from option_info)
250 * sm_debug(): debug message
251 * sm_msg(): other message (please avoid using this)
252 */
253
254 #define sm_printf(msg...) do { \
255 if (final_pass || option_debug || local_debug || debug_db) \
256 fprintf(sm_outfd, msg); \
257 } while (0)
258
259 static inline void sm_prefix(void)
260 {
261 sm_printf("%s: %s:%d %s() ", progname, get_filename(), get_lineno(), get_function());
262 }
263
264 static inline void print_implied_debug_msg();
265
266 extern bool __silence_warnings_for_stmt;
267
268 #define sm_print_msg(type, msg...) \
269 do { \
270 print_implied_debug_msg(); \
271 if (!final_pass && !option_debug && !local_debug && !debug_db) \
272 break; \
273 if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
274 break; \
275 if (!option_info && is_silenced_function()) \
276 break; \
277 sm_prefix(); \
278 if (type == 1) { \
279 sm_printf("warn: "); \
280 sm_nr_checks++; \
281 } else if (type == 2) { \
282 sm_printf("error: "); \
283 sm_nr_checks++; \
284 } else if (type == 3) { \
285 sm_printf("parse error: "); \
286 sm_nr_errors++; \
287 } \
288 sm_printf(msg); \
289 sm_printf("\n"); \
290 } while (0)
291
292 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
293
294 extern char *implied_debug_msg;
295 static inline void print_implied_debug_msg(void)
296 {
297 static struct symbol *last_printed = NULL;
298
299 if (!implied_debug_msg)
300 return;
301 if (last_printed == cur_func_sym)
302 return;
303 last_printed = cur_func_sym;
304 sm_msg("%s", implied_debug_msg);
305 }
306
307 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
308 #define db_debug(msg...) do { if (option_debug || debug_db) sm_printf(msg); } while (0)
309
310 #define sm_info(msg...) do { \
311 if (option_debug || (option_info && final_pass)) { \
312 sm_prefix(); \
313 sm_printf("info: "); \
314 sm_printf(msg); \
315 sm_printf("\n"); \
316 } \
317 } while(0)
318
319 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
320 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
321 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
322
323 static inline void sm_fatal(const char *fmt, ...)
324 {
325 va_list args;
326
327 va_start(args, fmt);
328 vfprintf(sm_outfd, fmt, args);
329 va_end(args);
330
331 fprintf(sm_outfd, "\n");
332
333 exit(1);
334 }
335
336 static inline void sm_ierror(const char *fmt, ...)
337 {
338 va_list args;
339
340 sm_nr_errors++;
341
342 fprintf(sm_outfd, "internal error: ");
343
344 va_start(args, fmt);
345 vfprintf(sm_outfd, fmt, args);
346 va_end(args);
347
348 fprintf(sm_outfd, "\n");
349 }
350 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
351
352 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym);
353 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
354 struct smatch_state *get_state_expr(int owner, struct expression *expr);
355 struct state_list *get_possible_states(int owner, const char *name,
356 struct symbol *sym);
357 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
358 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
359 struct smatch_state *state);
360 struct sm_state *set_state_expr(int owner, struct expression *expr,
361 struct smatch_state *state);
362 void delete_state(int owner, const char *name, struct symbol *sym);
363 void delete_state_expr(int owner, struct expression *expr);
364 void __delete_all_states_sym(struct symbol *sym);
365 void set_true_false_states(int owner, const char *name, struct symbol *sym,
366 struct smatch_state *true_state,
367 struct smatch_state *false_state);
368 void set_true_false_states_expr(int owner, struct expression *expr,
369 struct smatch_state *true_state,
370 struct smatch_state *false_state);
371
372 struct stree *get_all_states_from_stree(int owner, struct stree *source);
373 struct stree *get_all_states_stree(int id);
374 struct stree *__get_cur_stree(void);
375 int is_reachable(void);
376 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
377
378 /* smatch_helper.c */
379 DECLARE_PTR_LIST(int_stack, int);
380 char *alloc_string(const char *str);
381 char *alloc_string_newline(const char *str);
382 void free_string(char *str);
383 void append(char *dest, const char *data, int buff_len);
384 void remove_parens(char *str);
385 struct smatch_state *alloc_state_num(int num);
386 struct smatch_state *alloc_state_str(const char *name);
387 struct smatch_state *merge_str_state(struct smatch_state *s1, struct smatch_state *s2);
388 struct smatch_state *alloc_state_expr(struct expression *expr);
389 struct expression *get_argument_from_call_expr(struct expression_list *args,
390 int num);
391
392 char *expr_to_var(struct expression *expr);
393 struct symbol *expr_to_sym(struct expression *expr);
394 char *expr_to_str(struct expression *expr);
395 char *expr_to_str_sym(struct expression *expr,
396 struct symbol **sym_ptr);
397 char *expr_to_var_sym(struct expression *expr,
398 struct symbol **sym_ptr);
399 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
400 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
401 int get_complication_score(struct expression *expr);
402
403 int sym_name_is(const char *name, struct expression *expr);
404 int get_const_value(struct expression *expr, sval_t *sval);
405 int get_value(struct expression *expr, sval_t *val);
406 int get_implied_value(struct expression *expr, sval_t *val);
407 int get_implied_value_fast(struct expression *expr, sval_t *sval);
408 int get_implied_min(struct expression *expr, sval_t *sval);
409 int get_implied_max(struct expression *expr, sval_t *val);
410 int get_hard_max(struct expression *expr, sval_t *sval);
411 int get_fuzzy_min(struct expression *expr, sval_t *min);
412 int get_fuzzy_max(struct expression *expr, sval_t *max);
413 int get_absolute_min(struct expression *expr, sval_t *sval);
414 int get_absolute_max(struct expression *expr, sval_t *sval);
415 int parse_call_math(struct expression *expr, char *math, sval_t *val);
416 int parse_call_math_rl(struct expression *call, const char *math, struct range_list **rl);
417 const char *get_allocation_math(struct expression *expr);
418 char *get_value_in_terms_of_parameter_math(struct expression *expr);
419 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
420 int expr_is_zero(struct expression *expr);
421 int known_condition_true(struct expression *expr);
422 int known_condition_false(struct expression *expr);
423 int implied_condition_true(struct expression *expr);
424 int implied_condition_false(struct expression *expr);
425 int can_integer_overflow(struct symbol *type, struct expression *expr);
426 void clear_math_cache(void);
427 void set_fast_math_only(void);
428 void clear_fast_math_only(void);
429
430 int is_array(struct expression *expr);
431 struct expression *get_array_base(struct expression *expr);
432 struct expression *get_array_offset(struct expression *expr);
433 const char *show_state(struct smatch_state *state);
434 struct statement *get_expression_statement(struct expression *expr);
435 struct expression *strip_parens(struct expression *expr);
436 struct expression *strip_expr(struct expression *expr);
437 struct expression *strip_expr_set_parent(struct expression *expr);
438 void scoped_state(int my_id, const char *name, struct symbol *sym);
439 int is_error_return(struct expression *expr);
440 int getting_address(struct expression *expr);
441 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
442 char *get_member_name(struct expression *expr);
443 char *get_fnptr_name(struct expression *expr);
444 int cmp_pos(struct position pos1, struct position pos2);
445 int positions_eq(struct position pos1, struct position pos2);
446 struct statement *get_current_statement(void);
447 struct statement *get_prev_statement(void);
448 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
449 int get_param_num_from_sym(struct symbol *sym);
450 int get_param_num(struct expression *expr);
451 struct symbol *get_param_sym_from_num(int num);
452 int ms_since(struct timeval *start);
453 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
454 int parent_is_gone(struct expression *expr);
455 int invert_op(int op);
456 int op_remove_assign(int op);
457 int expr_equiv(struct expression *one, struct expression *two);
458 void push_int(struct int_stack **stack, int num);
459 int pop_int(struct int_stack **stack);
460
461 /* smatch_type.c */
462 struct symbol *get_real_base_type(struct symbol *sym);
463 int type_bytes(struct symbol *type);
464 int array_bytes(struct symbol *type);
465 struct symbol *get_pointer_type(struct expression *expr);
466 struct symbol *get_type(struct expression *expr);
467 struct symbol *get_final_type(struct expression *expr);
468 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
469 int type_signed(struct symbol *base_type);
470 int expr_unsigned(struct expression *expr);
471 int expr_signed(struct expression *expr);
472 int returns_unsigned(struct symbol *base_type);
473 int is_pointer(struct expression *expr);
474 int returns_pointer(struct symbol *base_type);
475 sval_t sval_type_max(struct symbol *base_type);
476 sval_t sval_type_min(struct symbol *base_type);
477 int nr_bits(struct expression *expr);
478 int is_void_pointer(struct expression *expr);
479 int is_char_pointer(struct expression *expr);
480 int is_string(struct expression *expr);
481 int is_static(struct expression *expr);
482 bool is_local_variable(struct expression *expr);
483 int types_equiv(struct symbol *one, struct symbol *two);
484 int fn_static(void);
485 const char *global_static();
486 struct symbol *cur_func_return_type(void);
487 struct symbol *get_arg_type(struct expression *fn, int arg);
488 struct symbol *get_member_type_from_key(struct expression *expr, const char *key);
489 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key);
490 int is_struct(struct expression *expr);
491 char *type_to_str(struct symbol *type);
492
493 /* smatch_ignore.c */
494 void add_ignore(int owner, const char *name, struct symbol *sym);
495 int is_ignored(int owner, const char *name, struct symbol *sym);
496 void add_ignore_expr(int owner, struct expression *expr);
497 int is_ignored_expr(int owner, struct expression *expr);
498
499 /* smatch_var_sym */
500 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
501 struct var_sym_list *expr_to_vsl(struct expression *expr);
502 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
503 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
504 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
505 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
506 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
507 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
508 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
509 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two);
510 void free_var_sym_list(struct var_sym_list **list);
511 void free_var_syms_and_list(struct var_sym_list **list);
512
513 /* smatch_tracker */
514 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
515 void add_tracker(struct tracker_list **list, int owner, const char *name,
516 struct symbol *sym);
517 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
518 void del_tracker(struct tracker_list **list, int owner, const char *name,
519 struct symbol *sym);
520 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
521 struct symbol *sym);
522 void free_tracker_list(struct tracker_list **list);
523 void free_trackers_and_list(struct tracker_list **list);
524
525 /* smatch_conditions */
526 int in_condition(void);
527
528 /* smatch_flow.c */
529
530 extern int __in_fake_assign;
531 extern int __in_fake_parameter_assign;
532 extern int __in_fake_struct_assign;
533 extern int in_fake_env;
534 void smatch (struct string_list *filelist);
535 int inside_loop(void);
536 int definitely_inside_loop(void);
537 struct expression *get_switch_expr(void);
538 int in_expression_statement(void);
539 void __process_post_op_stack(void);
540 void __split_expr(struct expression *expr);
541 void __split_label_stmt(struct statement *stmt);
542 void __split_stmt(struct statement *stmt);
543 extern int __in_function_def;
544 extern int __in_unmatched_hook;
545 extern int option_assume_loops;
546 extern int option_two_passes;
547 extern int option_no_db;
548 extern int option_file_output;
549 extern int option_time;
550 extern struct expression_list *big_expression_stack;
551 extern struct expression_list *big_condition_stack;
552 extern struct statement_list *big_statement_stack;
553 int is_assigned_call(struct expression *expr);
554 int inlinable(struct expression *expr);
555 extern int __inline_call;
556 extern struct expression *__inline_fn;
557 extern int __in_pre_condition;
558 extern int __bail_on_rest_of_function;
559 extern struct statement *__prev_stmt;
560 extern struct statement *__cur_stmt;
561 extern struct statement *__next_stmt;
562 void init_fake_env(void);
563 void end_fake_env(void);
564 int time_parsing_function(void);
565 bool taking_too_long(void);
566
567 /* smatch_struct_assignment.c */
568 struct expression *get_faked_expression(void);
569 void __fake_struct_member_assignments(struct expression *expr);
570
571 /* smatch_project.c */
572 int is_no_inline_function(const char *function);
573
574 /* smatch_conditions */
575 void __split_whole_condition(struct expression *expr);
576 void __handle_logic(struct expression *expr);
577 int is_condition(struct expression *expr);
578 int __handle_condition_assigns(struct expression *expr);
579 int __handle_select_assigns(struct expression *expr);
580 int __handle_expr_statement_assigns(struct expression *expr);
581
582 /* smatch_implied.c */
583 struct range_list_stack;
584 void param_limit_implications(struct expression *expr, int param, char *key, char *value);
585 struct stree *__implied_case_stree(struct expression *switch_expr,
586 struct range_list *case_rl,
587 struct range_list_stack **remaining_cases,
588 struct stree **raw_stree);
589 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
590 int assume(struct expression *expr);
591 void end_assume(void);
592 int impossible_assumption(struct expression *left, int op, sval_t sval);
593
594 /* smatch_slist.h */
595 bool has_dynamic_states(unsigned short owner);
596 void set_dynamic_states(unsigned short owner);
597
598 /* smatch_extras.c */
599 int in_warn_on_macro(void);
600 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */
601 extern int RETURN_ID;
602
603 struct data_range {
604 sval_t min;
605 sval_t max;
606 };
607
608 #define MTAG_ALIAS_BIT (1ULL << 63)
609 #define MTAG_OFFSET_MASK 0xfffULL
610 #define MTAG_SEED 0xdead << 12
611
612 const extern unsigned long valid_ptr_min;
613 extern unsigned long valid_ptr_max;
614 extern const sval_t valid_ptr_min_sval;
615 extern sval_t valid_ptr_max_sval;
616 extern struct range_list *valid_ptr_rl;
617 void alloc_valid_ptr_rl(void);
618
619 static const sval_t array_min_sval = {
620 .type = &ptr_ctype,
621 {.value = 100000},
622 };
623 static const sval_t array_max_sval = {
624 .type = &ptr_ctype,
625 {.value = ULONG_MAX - 4095},
626 };
627 static const sval_t text_seg_min = {
628 .type = &ptr_ctype,
629 {.value = 4096},
630 };
631 static const sval_t text_seg_max = {
632 .type = &ptr_ctype,
633 {.value = ULONG_MAX - 4095},
634 };
635 static const sval_t data_seg_min = {
636 .type = &ptr_ctype,
637 {.value = 4096},
638 };
639 static const sval_t data_seg_max = {
640 .type = &ptr_ctype,
641 {.value = ULONG_MAX - 4095},
642 };
643 static const sval_t bss_seg_min = {
644 .type = &ptr_ctype,
645 {.value = 4096},
646 };
647 static const sval_t bss_seg_max = {
648 .type = &ptr_ctype,
649 {.value = ULONG_MAX - 4095},
650 };
651 static const sval_t stack_seg_min = {
652 .type = &ptr_ctype,
653 {.value = 4096},
654 };
655 static const sval_t stack_seg_max = {
656 .type = &ptr_ctype,
657 {.value = ULONG_MAX - 4095},
658 };
659 static const sval_t kmalloc_seg_min = {
660 .type = &ptr_ctype,
661 {.value = 4096},
662 };
663 static const sval_t kmalloc_seg_max = {
664 .type = &ptr_ctype,
665 {.value = ULONG_MAX - 4095},
666 };
667 static const sval_t vmalloc_seg_min = {
668 .type = &ptr_ctype,
669 {.value = 4096},
670 };
671 static const sval_t vmalloc_seg_max = {
672 .type = &ptr_ctype,
673 {.value = ULONG_MAX - 4095},
674 };
675 static const sval_t fn_ptr_min = {
676 .type = &ptr_ctype,
677 {.value = 4096},
678 };
679 static const sval_t fn_ptr_max = {
680 .type = &ptr_ctype,
681 {.value = ULONG_MAX - 4095},
682 };
683
684 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
685 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
686 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym, bool use_stack);
687
688 #define STRLEN_MAX_RET 1010101
689
690 /* smatch_absolute.c */
691 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
692 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
693
694 /* smatch_type_value.c */
695 int get_db_type_rl(struct expression *expr, struct range_list **rl);
696 /* smatch_data_val.c */
697 int get_mtag_rl(struct expression *expr, struct range_list **rl);
698 /* smatch_array_values.c */
699 int get_array_rl(struct expression *expr, struct range_list **rl);
700
701 /* smatch_states.c */
702 struct stree *__swap_cur_stree(struct stree *stree);
703 void __push_fake_cur_stree();
704 struct stree *__pop_fake_cur_stree();
705 void __free_fake_cur_stree();
706 void __set_fake_cur_stree_fast(struct stree *stree);
707 void __pop_fake_cur_stree_fast(void);
708 void __merge_stree_into_cur(struct stree *stree);
709
710 int unreachable(void);
711 void __set_cur_stree_readonly(void);
712 void __set_cur_stree_writable(void);
713 void __set_sm(struct sm_state *sm);
714 void __set_sm_cur_stree(struct sm_state *sm);
715 void __set_sm_fake_stree(struct sm_state *sm);
716 void __set_true_false_sm(struct sm_state *true_state,
717 struct sm_state *false_state);
718 void nullify_path(void);
719 void __match_nullify_path_hook(const char *fn, struct expression *expr,
720 void *unused);
721 void __unnullify_path(void);
722 int __path_is_null(void);
723 void save_all_states(void);
724 void restore_all_states(void);
725 void free_goto_stack(void);
726 void clear_all_states(void);
727
728 struct sm_state *get_sm_state(int owner, const char *name,
729 struct symbol *sym);
730 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
731 void __push_true_states(void);
732 void __use_false_states(void);
733 void __discard_false_states(void);
734 void __merge_false_states(void);
735 void __merge_true_states(void);
736
737 void __negate_cond_stacks(void);
738 void __use_pre_cond_states(void);
739 void __use_cond_true_states(void);
740 void __use_cond_false_states(void);
741 void __push_cond_stacks(void);
742 void __fold_in_set_states(void);
743 void __free_set_states(void);
744 struct stree *__copy_cond_true_states(void);
745 struct stree *__copy_cond_false_states(void);
746 struct stree *__pop_cond_true_stack(void);
747 struct stree *__pop_cond_false_stack(void);
748 void __and_cond_states(void);
749 void __or_cond_states(void);
750 void __save_pre_cond_states(void);
751 void __discard_pre_cond_states(void);
752 struct stree *__get_true_states(void);
753 struct stree *__get_false_states(void);
754 void __use_cond_states(void);
755 extern struct state_list *__last_base_slist;
756
757 void __push_continues(void);
758 void __discard_continues(void);
759 void __process_continues(void);
760 void __merge_continues(void);
761
762 void __push_breaks(void);
763 void __process_breaks(void);
764 int __has_breaks(void);
765 void __merge_breaks(void);
766 void __use_breaks(void);
767
768 void __save_switch_states(struct expression *switch_expr);
769 void __discard_switches(void);
770 int have_remaining_cases(void);
771 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl);
772 void __push_default(void);
773 void __set_default(void);
774 int __pop_default(void);
775
776 void __push_conditions(void);
777 void __discard_conditions(void);
778
779 void __save_gotos(const char *name, struct symbol *sym);
780 void __merge_gotos(const char *name, struct symbol *sym);
781
782 void __print_cur_stree(void);
783
784 /* smatch_hooks.c */
785 void __pass_to_client(void *data, enum hook_type type);
786 void __pass_case_to_client(struct expression *switch_expr,
787 struct range_list *rl);
788 int __has_merge_function(int client_id);
789 struct smatch_state *__client_merge_function(int owner,
790 struct smatch_state *s1,
791 struct smatch_state *s2);
792 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
793 void call_pre_merge_hook(struct sm_state *cur, struct sm_state *other);
794 void __push_scope_hooks(void);
795 void __call_scope_hooks(void);
796
797 /* smatch_function_hooks.c */
798 void create_function_hook_hash(void);
799 void __match_initializer_call(struct symbol *sym);
800
801 /* smatch_db.c */
802 enum info_type {
803 INTERNAL = 0,
804 /*
805 * Changing these numbers is a pain. Don't do it. If you ever use a
806 * number it can't be re-used right away so there may be gaps.
807 * We select these in order by type so if the order matters, then give
808 * it a number below 100-999,9000-9999 ranges. */
809
810 PARAM_CLEARED = 101,
811 PARAM_LIMIT = 103,
812 PARAM_FILTER = 104,
813
814 PARAM_VALUE = 1001,
815 BUF_SIZE = 1002,
816 CAPPED_DATA = 1004,
817 RETURN_VALUE = 1005,
818 DEREFERENCE = 1006,
819 RANGE_CAP = 1007,
820 ABSOLUTE_LIMITS = 1010,
821 PARAM_ADD = 1012,
822 PARAM_FREED = 1013,
823 DATA_SOURCE = 1014,
824 FUZZY_MAX = 1015,
825 HARD_MAX = 2015,
826 STR_LEN = 1016,
827 ARRAY_LEN = 1017,
828 CAPABLE = 1018,
829 NS_CAPABLE = 1019,
830 CONTAINER = 1020,
831 CASTED_CALL = 1021,
832 TYPE_LINK = 1022,
833 UNTRACKED_PARAM = 1023,
834 LOST_PARAM = 2023,
835 CULL_PATH = 1024,
836 PARAM_SET = 1025,
837 PARAM_USED = 1026,
838 BYTE_UNITS = 1027,
839 COMPARE_LIMIT = 1028,
840 PARAM_COMPARE = 1029,
841 CONSTRAINT = 1031,
842 PASSES_TYPE = 1032,
843 CONSTRAINT_REQUIRED = 1033,
844 BIT_INFO = 1034,
845 NOSPEC = 1035,
846 NOSPEC_WB = 1036,
847 STMT_CNT = 1037,
848 TERMINATED = 1038,
849 FRESH_ALLOC = 1044,
850
851 /* put random temporary stuff in the 7000-7999 range for testing */
852 USER_DATA = 8017,
853 USER_DATA_SET = 9017,
854 NO_OVERFLOW = 8018,
855 NO_OVERFLOW_SIMPLE = 8019,
856 LOCKED = 8020,
857 UNLOCKED = 8021,
858 HALF_LOCKED = 9022,
859 LOCK_RESTORED = 9023,
860 KNOWN_LOCKED = 9024,
861 KNOWN_UNLOCKED = 9025,
862 SET_FS = 8022,
863 ATOMIC_INC = 8023,
864 ATOMIC_DEC = 8024,
865 NO_SIDE_EFFECT = 8025,
866 FN_ARG_LINK = 8028,
867 DATA_VALUE = 8029,
868 ARRAYSIZE_ARG = 8033,
869 SIZEOF_ARG = 8034,
870 MEMORY_TAG = 8036,
871 MTAG_ASSIGN = 8035,
872 STRING_VALUE = 8041,
873
874 BYTE_COUNT = 8050,
875 ELEM_COUNT = 8051,
876 ELEM_LAST = 8052,
877 USED_LAST = 8053,
878 USED_COUNT = 8054,
879 };
880
881 extern struct sqlite3 *smatch_db;
882 extern struct sqlite3 *mem_db;
883 extern struct sqlite3 *cache_db;
884
885 void db_ignore_states(int id);
886 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
887 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
888 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
889 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));
890 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
891 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
892 struct range_list *db_return_vals(struct expression *expr);
893 struct range_list *db_return_vals_from_str(const char *fn_name);
894 struct range_list *db_return_vals_no_args(struct expression *expr);
895 char *return_state_to_var_sym(struct expression *expr, int param, const char *key, struct symbol **sym);
896 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
897 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
898 const char *state_name_to_param_name(const char *state_name, const char *param_name);
899 const char *get_param_name_var_sym(const char *name, struct symbol *sym);
900 const char *get_param_name(struct sm_state *sm);
901 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
902 const char *get_mtag_name_expr(struct expression *expr);
903 char *get_data_info_name(struct expression *expr);
904 char *sm_to_arg_name(struct expression *expr, struct sm_state *sm);
905 int is_recursive_member(const char *param_name);
906
907 char *escape_newlines(const char *str);
908 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
909
910 #define sql_helper(db, call_back, data, sql...) \
911 do { \
912 char sql_txt[1024]; \
913 \
914 sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql); \
915 db_debug("debug: %s\n", sql_txt); \
916 sql_exec(db, call_back, data, sql_txt); \
917 } while (0)
918
919
920 #define run_sql(call_back, data, sql...) \
921 do { \
922 if (option_no_db) \
923 break; \
924 sql_helper(smatch_db, call_back, data, sql); \
925 } while (0)
926
927 #define mem_sql(call_back, data, sql...) \
928 sql_helper(mem_db, call_back, data, sql)
929
930 #define cache_sql(call_back, data, sql...) \
931 sql_helper(cache_db, call_back, data, sql)
932
933 #define sql_insert_helper(table, db, ignore, late, values...) \
934 do { \
935 struct sqlite3 *_db = db; \
936 \
937 if (__inline_fn && !_db) \
938 _db = mem_db; \
939 if (_db) { \
940 char buf[1024]; \
941 char *err, *p = buf; \
942 int rc; \
943 \
944 p += snprintf(p, buf + sizeof(buf) - p, \
945 "insert %sinto %s values (", \
946 ignore ? "or ignore " : "", #table); \
947 p += snprintf(p, buf + sizeof(buf) - p, values); \
948 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
949 db_debug("mem-db: %s\n", buf); \
950 rc = sqlite3_exec(_db, buf, NULL, NULL, &err); \
951 if (rc != SQLITE_OK) { \
952 sm_ierror("SQL error #2: %s", err); \
953 sm_ierror("SQL: '%s'", buf); \
954 parse_error = 1; \
955 } \
956 break; \
957 } \
958 if (option_info) { \
959 FILE *tmp_fd = sm_outfd; \
960 sm_outfd = sql_outfd; \
961 sm_prefix(); \
962 sm_printf("SQL%s: insert %sinto " #table " values(", \
963 late ? "_late" : "", ignore ? "or ignore " : ""); \
964 sm_printf(values); \
965 sm_printf(");\n"); \
966 sm_outfd = tmp_fd; \
967 } \
968 } while (0)
969
970 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, 0, values);
971 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 0, 1, 0, values);
972 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 0, 1, values);
973 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
974
975 char *get_static_filter(struct symbol *sym);
976
977 void sql_insert_return_states(int return_id, const char *return_ranges,
978 int type, int param, const char *key, const char *value);
979 void sql_insert_caller_info(struct expression *call, int type, int param,
980 const char *key, const char *value);
981 void sql_insert_function_ptr(const char *fn, const char *struct_name);
982 void sql_insert_return_values(const char *return_values);
983 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
984 void sql_insert_function_type_size(const char *member, const char *ranges);
985 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
986 void sql_insert_type_info(int type, const char *member, const char *value);
987 void sql_insert_local_values(const char *name, const char *value);
988 void sql_insert_function_type_value(const char *type, const char *value);
989 void sql_insert_function_type(int param, const char *value);
990 void sql_insert_parameter_name(int param, const char *value);
991 void sql_insert_data_info(struct expression *data, int type, const char *value);
992 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
993 void sql_save_constraint(const char *con);
994 void sql_save_constraint_required(const char *data, int op, const char *limit);
995 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
996 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
997 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
998 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);
999 void sql_insert_mtag_map(mtag_t tag, int offset, mtag_t container);
1000 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
1001 int mtag_map_select_container(mtag_t tag, int offset, mtag_t *container);
1002 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);
1003 struct smatch_state *swap_mtag_return(struct expression *expr, struct smatch_state *state);
1004 struct range_list *swap_mtag_seed(struct expression *expr, struct range_list *rl);
1005
1006 void sql_select_return_states(const char *cols, struct expression *call,
1007 int (*callback)(void*, int, char**, char**), void *info);
1008 void sql_select_call_implies(const char *cols, struct expression *call,
1009 int (*callback)(void*, int, char**, char**));
1010
1011 void open_smatch_db(char *db_file);
1012
1013 /* smatch_files.c */
1014 int open_data_file(const char *filename);
1015 int open_schema_file(const char *schema);
1016 struct token *get_tokens_file(const char *filename);
1017
1018 /* smatch.c */
1019 extern char *option_debug_check;
1020 extern char *option_project_str;
1021 extern char *bin_dir;
1022 extern char *data_dir;
1023 extern int option_no_data;
1024 extern int option_full_path;
1025 extern int option_call_tree;
1026 extern int num_checks;
1027
1028 enum project_type {
1029 PROJ_NONE,
1030 PROJ_KERNEL,
1031 PROJ_WINE,
1032 PROJ_ILLUMOS_KERNEL,
1033 PROJ_ILLUMOS_USER,
1034 PROJ_UNKNOWN,
1035 };
1036 extern enum project_type option_project;
1037 const char *check_name(unsigned short id);
1038 int id_from_name(const char *name);
1039
1040
1041 /* smatch_buf_size.c */
1042 int get_array_size(struct expression *expr);
1043 int get_array_size_bytes(struct expression *expr);
1044 int get_array_size_bytes_min(struct expression *expr);
1045 int get_array_size_bytes_max(struct expression *expr);
1046 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1047 int get_real_array_size(struct expression *expr);
1048 int last_member_is_resizable(struct symbol *type);
1049 /* smatch_strlen.c */
1050 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1051 int get_size_from_strlen(struct expression *expr);
1052
1053 /* smatch_capped.c */
1054 int is_capped(struct expression *expr);
1055 int is_capped_var_sym(const char *name, struct symbol *sym);
1056
1057 /* check_user_data.c */
1058 int is_user_macro(struct expression *expr);
1059 int is_capped_user_data(struct expression *expr);
1060 int implied_user_data(struct expression *expr, struct range_list **rl);
1061 struct stree *get_user_stree(void);
1062 int get_user_rl(struct expression *expr, struct range_list **rl);
1063 int is_user_rl(struct expression *expr);
1064 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1065 bool user_rl_capped(struct expression *expr);
1066 struct range_list *var_user_rl(struct expression *expr);
1067
1068 /* check_locking.c */
1069 void print_held_locks();
1070
1071 /* check_assigned_expr.c */
1072 struct expression *get_assigned_expr(struct expression *expr);
1073 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1074 /* smatch_return_to_param.c */
1075 void __add_return_to_param_mapping(struct expression *assign, const char *return_string);
1076 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1077
1078 /* smatch_comparison.c */
1079 extern int comparison_id;
1080 #define UNKNOWN_COMPARISON 0
1081 #define IMPOSSIBLE_COMPARISON -1
1082 struct compare_data {
1083 /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1084 struct expression *left;
1085 const char *left_var;
1086 struct var_sym_list *left_vsl;
1087 int comparison;
1088 struct expression *right;
1089 const char *right_var;
1090 struct var_sym_list *right_vsl;
1091 };
1092 DECLARE_ALLOCATOR(compare_data);
1093 struct smatch_state *alloc_compare_state(
1094 struct expression *left,
1095 const char *left_var, struct var_sym_list *left_vsl,
1096 int comparison,
1097 struct expression *right,
1098 const char *right_var, struct var_sym_list *right_vsl);
1099 int comparison_intersection(int orig, int op);
1100 int merge_comparisons(int one, int two);
1101 int combine_comparisons(int left_compare, int right_compare);
1102 int state_to_comparison(struct smatch_state *state);
1103 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1104 int get_comparison(struct expression *left, struct expression *right);
1105 int get_comparison_no_extra(struct expression *a, struct expression *b);
1106 int get_comparison_strings(const char *one, const char *two);
1107 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1108 struct state_list *get_all_comparisons(struct expression *expr);
1109 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1110 void __add_return_comparison(struct expression *call, const char *range);
1111 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1112 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1113 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1114 char *expr_equal_to_param(struct expression *expr, int ignore);
1115 char *expr_lte_to_param(struct expression *expr, int ignore);
1116 char *expr_param_comparison(struct expression *expr, int ignore);
1117 int flip_comparison(int op);
1118 int negate_comparison(int op);
1119 int remove_unsigned_from_comparison(int op);
1120 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1121 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1122 struct sm_state *comparison_implication_hook(struct expression *expr,
1123 struct state_list **true_stack,
1124 struct state_list **false_stack);
1125 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,
1126 const char *state_name,
1127 struct smatch_state *true_state, struct smatch_state *false_state);
1128 int impossibly_high_comparison(struct expression *expr);
1129
1130 /* smatch_sval.c */
1131 sval_t *sval_alloc(sval_t sval);
1132 sval_t *sval_alloc_permanent(sval_t sval);
1133 sval_t sval_blank(struct expression *expr);
1134 sval_t sval_type_val(struct symbol *type, long long val);
1135 sval_t sval_type_fval(struct symbol *type, long double fval);
1136 sval_t sval_from_val(struct expression *expr, long long val);
1137 sval_t sval_from_fval(struct expression *expr, long double fval);
1138 int sval_is_ptr(sval_t sval);
1139 bool sval_is_fp(sval_t sval);
1140 int sval_unsigned(sval_t sval);
1141 int sval_signed(sval_t sval);
1142 int sval_bits(sval_t sval);
1143 int sval_bits_used(sval_t sval);
1144 int sval_is_negative(sval_t sval);
1145 int sval_is_positive(sval_t sval);
1146 int sval_is_min(sval_t sval);
1147 int sval_is_max(sval_t sval);
1148 int sval_is_a_min(sval_t sval);
1149 int sval_is_a_max(sval_t sval);
1150 int sval_is_negative_min(sval_t sval);
1151 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1152 int sval_cmp_val(sval_t one, long long val);
1153 sval_t sval_min(sval_t one, sval_t two);
1154 sval_t sval_max(sval_t one, sval_t two);
1155 int sval_too_low(struct symbol *type, sval_t sval);
1156 int sval_too_high(struct symbol *type, sval_t sval);
1157 int sval_fits(struct symbol *type, sval_t sval);
1158 sval_t sval_cast(struct symbol *type, sval_t sval);
1159 sval_t sval_preop(sval_t sval, int op);
1160 sval_t sval_binop(sval_t left, int op, sval_t right);
1161 int sval_binop_overflows(sval_t left, int op, sval_t right);
1162 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);
1163 int find_first_zero_bit(unsigned long long uvalue);
1164 int sm_fls64(unsigned long long uvalue);
1165 unsigned long long fls_mask(unsigned long long uvalue);
1166 unsigned long long sval_fls_mask(sval_t sval);
1167 const char *sval_to_str(sval_t sval);
1168 const char *sval_to_str_or_err_ptr(sval_t sval);
1169 const char *sval_to_numstr(sval_t sval);
1170 sval_t ll_to_sval(long long val);
1171
1172 /* smatch_string_list.c */
1173 int list_has_string(struct string_list *str_list, const char *str);
1174 int insert_string(struct string_list **str_list, const char *str);
1175 struct string_list *clone_str_list(struct string_list *orig);
1176 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1177
1178 /* smatch_start_states.c */
1179 struct stree *get_start_states(void);
1180
1181 /* smatch_recurse.c */
1182 int has_symbol(struct expression *expr, struct symbol *sym);
1183 int has_variable(struct expression *expr, struct expression *var);
1184 int has_inc_dec(struct expression *expr);
1185
1186 /* smatch_stored_conditions.c */
1187 struct smatch_state *get_stored_condition(struct expression *expr);
1188 struct expression_list *get_conditions(struct expression *expr);
1189 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1190 struct state_list **true_stack,
1191 struct state_list **false_stack);
1192 /* smatch_parsed_conditions.c */
1193 struct sm_state *parsed_condition_implication_hook(struct expression *expr,
1194 struct state_list **true_stack,
1195 struct state_list **false_stack);
1196
1197 /* check_string_len.c */
1198 int get_formatted_string_size(struct expression *call, int arg);
1199 int get_formatted_string_min_size(struct expression *call, int arg);
1200
1201 /* smatch_param_set.c */
1202 int param_was_set(struct expression *expr);
1203 int param_was_set_var_sym(const char *name, struct symbol *sym);
1204 void print_limited_param_set(int return_id, char *return_ranges, struct expression *expr);
1205 /* smatch_param_filter.c */
1206 int param_has_filter_data(struct sm_state *sm);
1207
1208 /* smatch_links.c */
1209 void set_up_link_functions(int id, int linkid);
1210 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1211 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1212
1213 /* check_buf_comparison */
1214 const char *limit_type_str(unsigned int limit_type);
1215 struct expression *get_size_variable(struct expression *buf, int *limit_type);
1216 struct expression *get_array_variable(struct expression *size);
1217 int buf_comparison_index_ok(struct expression *expr);
1218
1219 /* smatch_untracked_param.c */
1220 void mark_untracked(struct expression *expr, int param, const char *key, const char *value);
1221 void add_untracked_param_hook(void (func)(struct expression *call, int param));
1222 void add_lost_param_hook(void (func)(struct expression *call, int param));
1223 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1224
1225 /* smatch_strings.c */
1226 struct state_list *get_strings(struct expression *expr);
1227 struct expression *fake_string_from_mtag(mtag_t tag);
1228
1229 /* smatch_estate.c */
1230 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1231
1232 /* smatch_address.c */
1233 int get_address_rl(struct expression *expr, struct range_list **rl);
1234 int get_member_offset(struct symbol *type, const char *member_name);
1235 int get_member_offset_from_deref(struct expression *expr);
1236
1237 /* for now this is in smatch_used_parameter.c */
1238 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1239
1240 /* smatch_buf_comparison.c */
1241 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1242
1243 struct stree *get_all_return_states(void);
1244 struct stree_stack *get_all_return_strees(void);
1245 int on_atomic_dec_path(void);
1246 int was_inced(const char *name, struct symbol *sym);
1247
1248 /* smatch_constraints.c */
1249 char *get_constraint_str(struct expression *expr);
1250 struct constraint_list *get_constraints(struct expression *expr);
1251 char *unmet_constraint(struct expression *data, struct expression *offset);
1252 char *get_required_constraint(const char *data_str);
1253
1254 /* smatch_container_of.c */
1255 int get_param_from_container_of(struct expression *expr);
1256 int get_offset_from_container_of(struct expression *expr);
1257 char *get_container_name(struct expression *container, struct expression *expr);
1258
1259 /* smatch_mtag.c */
1260 mtag_t str_to_mtag(const char *str);
1261 int get_string_mtag(struct expression *expr, mtag_t *tag);
1262 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);
1263 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1264 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1265 void update_mtag_data(struct expression *expr, struct smatch_state *state);
1266 int get_mtag_sval(struct expression *expr, sval_t *sval);
1267
1268 /* Trinity fuzzer stuff */
1269 const char *get_syscall_arg_type(struct symbol *sym);
1270
1271 /* smatch_bit_info.c */
1272 struct bit_info *rl_to_binfo(struct range_list *rl);
1273 struct bit_info *get_bit_info(struct expression *expr);
1274 struct bit_info *get_bit_info_var_sym(const char *name, struct symbol *sym);
1275 /* smatch_mem_tracker.c */
1276 extern int option_mem;
1277 unsigned long get_mem_kb(void);
1278 unsigned long get_max_memory(void);
1279
1280 /* check_is_nospec.c */
1281 bool is_nospec(struct expression *expr);
1282 long get_stmt_cnt(void);
1283
1284 /* smatch_nul_terminator.c */
1285 bool is_nul_terminated_var_sym(const char *name, struct symbol *sym);
1286 bool is_nul_terminated(struct expression *expr);
1287 /* check_kernel.c */
1288 bool is_ignored_kernel_data(const char *name);
1289
1290 bool is_fresh_alloc_var_sym(const char *var, struct symbol *sym);
1291 bool is_fresh_alloc(struct expression *expr);
1292 static inline bool type_is_ptr(struct symbol *type)
1293 {
1294 return type &&
1295 (type->type == SYM_PTR ||
1296 type->type == SYM_ARRAY ||
1297 type->type == SYM_FN);
1298 }
1299
1300 static inline bool type_is_fp(struct symbol *type)
1301 {
1302 return type &&
1303 (type == &float_ctype ||
1304 type == &double_ctype ||
1305 type == &ldouble_ctype);
1306 }
1307
1308 static inline int type_bits(struct symbol *type)
1309 {
1310 if (!type)
1311 return 0;
1312 if (type_is_ptr(type))
1313 return bits_in_pointer;
1314 if (!type->examined)
1315 examine_symbol_type(type);
1316 return type->bit_size;
1317 }
1318
1319 static inline int type_unsigned(struct symbol *base_type)
1320 {
1321 if (!base_type)
1322 return 0;
1323 if (is_ptr_type(base_type))
1324 return 1;
1325 if (base_type->ctype.modifiers & MOD_UNSIGNED)
1326 return 1;
1327 return 0;
1328 }
1329
1330 static inline int type_positive_bits(struct symbol *type)
1331 {
1332 if (!type)
1333 return 0;
1334 if (is_ptr_type(type))
1335 return bits_in_pointer;
1336 if (type_unsigned(type))
1337 return type_bits(type);
1338 return type_bits(type) - 1;
1339 }
1340
1341 static inline int sval_positive_bits(sval_t sval)
1342 {
1343 return type_positive_bits(sval.type);
1344 }
1345
1346 /*
1347 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1348 */
1349
1350 static inline int fp_cmp(sval_t one, sval_t two)
1351 {
1352 struct symbol *type;
1353
1354 if (sval_is_fp(one) && sval_is_fp(two))
1355 type = type_bits(one.type) > type_bits(two.type) ? one.type : two.type;
1356 else if (sval_is_fp(one))
1357 type = one.type;
1358 else
1359 type = two.type;
1360
1361 one = sval_cast(type, one);
1362 two = sval_cast(type, two);
1363
1364 if (one.type == &float_ctype) {
1365 if (one.fvalue < two.fvalue)
1366 return -1;
1367 if (one.fvalue == two.fvalue)
1368 return 0;
1369 return 1;
1370 }
1371 if (one.type == &double_ctype) {
1372 if (one.dvalue < two.dvalue)
1373 return -1;
1374 if (one.dvalue == two.dvalue)
1375 return 0;
1376 return 1;
1377 }
1378 if (one.type == &ldouble_ctype) {
1379 if (one.ldvalue < two.ldvalue)
1380 return -1;
1381 if (one.ldvalue == two.ldvalue)
1382 return 0;
1383 return 1;
1384 }
1385 sm_perror("bad type in fp_cmp(): %s", type_to_str(type));
1386 return 1;
1387 }
1388
1389 static inline int sval_cmp(sval_t one, sval_t two)
1390 {
1391 struct symbol *type;
1392
1393 if (sval_is_fp(one) || sval_is_fp(two))
1394 return fp_cmp(one, two);
1395
1396 type = one.type;
1397 if (sval_positive_bits(two) > sval_positive_bits(one))
1398 type = two.type;
1399 if (type_bits(type) < 31)
1400 type = &int_ctype;
1401
1402 one = sval_cast(type, one);
1403 two = sval_cast(type, two);
1404
1405 if (type_unsigned(type)) {
1406 if (one.uvalue < two.uvalue)
1407 return -1;
1408 if (one.uvalue == two.uvalue)
1409 return 0;
1410 return 1;
1411 }
1412 /* fix me handle type promotion and unsigned values */
1413 if (one.value < two.value)
1414 return -1;
1415 if (one.value == two.value)
1416 return 0;
1417 return 1;
1418 }
1419
1420 #endif /* !SMATCH_H_ */