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