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 18 #ifndef SMATCH_H_ 19 # define SMATCH_H_ 20 21 #include <stdio.h> 22 #include <string.h> 23 #include <limits.h> 24 #include <sys/time.h> 25 #include <sqlite3.h> 26 #include "lib.h" 27 #include "allocate.h" 28 #include "scope.h" 29 #include "parse.h" 30 #include "expression.h" 31 #include "avl.h" 32 33 typedef struct { 34 struct symbol *type; 35 union { 36 long long value; 37 unsigned long long uvalue; 38 }; 39 } sval_t; 40 41 typedef long long mtag_t; 42 43 struct smatch_state { 44 const char *name; 45 void *data; 46 }; 47 #define STATE(_x) static struct smatch_state _x = { .name = #_x } 48 extern struct smatch_state undefined; 49 extern struct smatch_state ghost; 50 extern struct smatch_state merged; 51 extern struct smatch_state true_state; 52 extern struct smatch_state false_state; 53 DECLARE_ALLOCATOR(smatch_state); 54 55 static inline void *INT_PTR(int i) 56 { 57 return (void *)(long)i; 58 } 59 60 static inline int PTR_INT(void *p) 61 { 62 return (int)(long)p; 63 } 64 65 struct tracker { 66 char *name; 67 struct symbol *sym; 68 unsigned short owner; 69 }; 70 DECLARE_ALLOCATOR(tracker); 71 DECLARE_PTR_LIST(tracker_list, struct tracker); 72 DECLARE_PTR_LIST(stree_stack, struct stree); 73 74 /* The first 3 struct members must match struct tracker */ 75 struct sm_state { 76 const char *name; 77 struct symbol *sym; 78 unsigned short owner; 79 unsigned short merged:1; 80 unsigned short skip_implications:1; 81 unsigned int nr_children; 82 unsigned int line; 83 struct smatch_state *state; 84 struct stree *pool; 85 struct sm_state *left; 86 struct sm_state *right; 87 struct state_list *possible; 88 }; 89 90 struct var_sym { 91 char *var; 92 struct symbol *sym; 93 }; 94 DECLARE_ALLOCATOR(var_sym); 95 DECLARE_PTR_LIST(var_sym_list, struct var_sym); 96 97 struct constraint { 98 int op; 99 int id; 100 }; 101 DECLARE_PTR_LIST(constraint_list, struct constraint); 102 103 enum hook_type { 104 EXPR_HOOK, 105 STMT_HOOK, 106 STMT_HOOK_AFTER, 107 SYM_HOOK, 108 STRING_HOOK, 109 DECLARATION_HOOK, 110 ASSIGNMENT_HOOK, 111 ASSIGNMENT_HOOK_AFTER, 112 RAW_ASSIGNMENT_HOOK, 113 GLOBAL_ASSIGNMENT_HOOK, 114 LOGIC_HOOK, 115 CONDITION_HOOK, 116 PRELOOP_HOOK, 117 SELECT_HOOK, 118 WHOLE_CONDITION_HOOK, 119 FUNCTION_CALL_HOOK_BEFORE, 120 FUNCTION_CALL_HOOK, 121 CALL_HOOK_AFTER_INLINE, 122 FUNCTION_CALL_HOOK_AFTER_DB, 123 CALL_ASSIGNMENT_HOOK, 124 MACRO_ASSIGNMENT_HOOK, 125 BINOP_HOOK, 126 OP_HOOK, 127 DEREF_HOOK, 128 CASE_HOOK, 129 ASM_HOOK, 130 CAST_HOOK, 131 SIZEOF_HOOK, 132 BASE_HOOK, 133 FUNC_DEF_HOOK, 134 AFTER_DEF_HOOK, 135 END_FUNC_HOOK, 136 AFTER_FUNC_HOOK, 137 RETURN_HOOK, 138 INLINE_FN_START, 139 INLINE_FN_END, 140 END_FILE_HOOK, 141 NUM_HOOKS, 142 }; 143 144 #define TRUE 1 145 #define FALSE 0 146 147 struct range_list; 148 149 void add_hook(void *func, enum hook_type type); 150 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2); 151 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state); 152 void add_merge_hook(int client_id, merge_func_t *func); 153 void add_unmatched_state_hook(int client_id, unmatched_func_t *func); 154 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *sm)); 155 typedef void (scope_hook)(void *data); 156 void add_scope_hook(scope_hook *hook, void *data); 157 typedef void (func_hook)(const char *fn, struct expression *expr, void *data); 158 typedef void (implication_hook)(const char *fn, struct expression *call_expr, 159 struct expression *assign_expr, void *data); 160 typedef void (return_implies_hook)(struct expression *call_expr, 161 int param, char *key, char *value); 162 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl); 163 void add_function_hook(const char *look_for, func_hook *call_back, void *data); 164 165 void add_function_assign_hook(const char *look_for, func_hook *call_back, 166 void *info); 167 void add_implied_return_hook(const char *look_for, 168 implied_return_hook *call_back, 169 void *info); 170 void add_macro_assign_hook(const char *look_for, func_hook *call_back, 171 void *info); 172 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back, 173 void *info); 174 void return_implies_state(const char *look_for, long long start, long long end, 175 implication_hook *call_back, void *info); 176 void select_return_states_hook(int type, return_implies_hook *callback); 177 void select_return_states_before(void (*fn)(void)); 178 void select_return_states_after(void (*fn)(void)); 179 int get_implied_return(struct expression *expr, struct range_list **rl); 180 void allocate_hook_memory(void); 181 182 struct modification_data { 183 struct smatch_state *prev; 184 struct expression *cur; 185 }; 186 187 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr); 188 void add_modification_hook(int owner, modification_hook *call_back); 189 void add_modification_hook_late(int owner, modification_hook *call_back); 190 struct smatch_state *get_modification_state(struct expression *expr); 191 192 int outside_of_function(void); 193 const char *get_filename(void); 194 const char *get_base_file(void); 195 char *get_function(void); 196 int get_lineno(void); 197 extern int final_pass; 198 extern struct symbol *cur_func_sym; 199 extern int option_debug; 200 extern int local_debug; 201 extern int option_info; 202 extern int option_spammy; 203 extern char *trace_variable; 204 extern struct stree *global_states; 205 int is_skipped_function(void); 206 int is_silenced_function(void); 207 208 /* smatch_impossible.c */ 209 int is_impossible_path(void); 210 void set_path_impossible(void); 211 212 extern FILE *sm_outfd; 213 extern FILE *sql_outfd; 214 extern FILE *caller_info_fd; 215 extern int sm_nr_checks; 216 extern int sm_nr_errors; 217 extern const char *progname; 218 219 /* 220 * How to use these routines: 221 * 222 * sm_fatal(): an internal error of some kind that should immediately exit 223 * sm_ierror(): an internal error 224 * sm_perror(): an internal error from parsing input source 225 * sm_error(): an error from input source 226 * sm_warning(): a warning from input source 227 * sm_info(): info message (from option_info) 228 * sm_debug(): debug message 229 * sm_msg(): other message (please avoid using this) 230 */ 231 232 #define sm_printf(msg...) do { if (final_pass || option_debug || local_debug) fprintf(sm_outfd, msg); } while (0) 233 234 static inline void sm_prefix(void) 235 { 236 sm_printf("%s: %s:%d %s() ", progname, get_filename(), get_lineno(), get_function()); 237 } 238 239 static inline void print_implied_debug_msg(); 240 241 extern bool __silence_warnings_for_stmt; 242 243 #define sm_print_msg(type, msg...) \ 244 do { \ 245 print_implied_debug_msg(); \ 246 if (!final_pass && !option_debug && !local_debug) \ 247 break; \ 248 if (__silence_warnings_for_stmt && !option_debug && !local_debug) \ 249 break; \ 250 if (!option_info && is_silenced_function()) \ 251 break; \ 252 sm_prefix(); \ 253 if (type == 1) { \ 254 sm_printf("warn: "); \ 255 sm_nr_checks++; \ 256 } else if (type == 2) { \ 257 sm_printf("error: "); \ 258 sm_nr_checks++; \ 259 } else if (type == 3) { \ 260 sm_printf("parse error: "); \ 261 sm_nr_errors++; \ 262 } \ 263 sm_printf(msg); \ 264 sm_printf("\n"); \ 265 } while (0) 266 267 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0) 268 269 #define local_debug(msg...) \ 270 do { \ 271 if (local_debug) \ 272 sm_msg(msg); \ 273 } while (0) 274 275 extern char *implied_debug_msg; 276 static inline void print_implied_debug_msg(void) 277 { 278 static struct symbol *last_printed = NULL; 279 280 if (!implied_debug_msg) 281 return; 282 if (last_printed == cur_func_sym) 283 return; 284 last_printed = cur_func_sym; 285 sm_msg("%s", implied_debug_msg); 286 } 287 288 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0) 289 290 #define sm_info(msg...) do { \ 291 if (option_debug || (option_info && final_pass)) { \ 292 sm_prefix(); \ 293 sm_printf("info: "); \ 294 sm_printf(msg); \ 295 sm_printf("\n"); \ 296 } \ 297 } while(0) 298 299 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0) 300 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0) 301 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0) 302 303 static inline void sm_fatal(const char *fmt, ...) 304 { 305 va_list args; 306 307 va_start(args, fmt); 308 vfprintf(sm_outfd, fmt, args); 309 va_end(args); 310 311 fprintf(sm_outfd, "\n"); 312 313 exit(1); 314 } 315 316 static inline void sm_ierror(const char *fmt, ...) 317 { 318 va_list args; 319 320 sm_nr_errors++; 321 322 fprintf(sm_outfd, "internal error: "); 323 324 va_start(args, fmt); 325 vfprintf(sm_outfd, fmt, args); 326 va_end(args); 327 328 fprintf(sm_outfd, "\n"); 329 } 330 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1)) 331 332 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym); 333 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym); 334 struct smatch_state *get_state_expr(int owner, struct expression *expr); 335 struct state_list *get_possible_states(int owner, const char *name, 336 struct symbol *sym); 337 struct state_list *get_possible_states_expr(int owner, struct expression *expr); 338 struct sm_state *set_state(int owner, const char *name, struct symbol *sym, 339 struct smatch_state *state); 340 struct sm_state *set_state_expr(int owner, struct expression *expr, 341 struct smatch_state *state); 342 void delete_state(int owner, const char *name, struct symbol *sym); 343 void delete_state_expr(int owner, struct expression *expr); 344 void __delete_all_states_sym(struct symbol *sym); 345 void set_true_false_states(int owner, const char *name, struct symbol *sym, 346 struct smatch_state *true_state, 347 struct smatch_state *false_state); 348 void set_true_false_states_expr(int owner, struct expression *expr, 349 struct smatch_state *true_state, 350 struct smatch_state *false_state); 351 352 struct stree *get_all_states_from_stree(int owner, struct stree *source); 353 struct stree *get_all_states_stree(int id); 354 struct stree *__get_cur_stree(void); 355 int is_reachable(void); 356 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym)); 357 358 /* smatch_helper.c */ 359 DECLARE_PTR_LIST(int_stack, int); 360 char *alloc_string(const char *str); 361 void free_string(char *str); 362 void append(char *dest, const char *data, int buff_len); 363 void remove_parens(char *str); 364 struct smatch_state *alloc_state_num(int num); 365 struct smatch_state *alloc_state_str(const char *name); 366 struct smatch_state *alloc_state_expr(struct expression *expr); 367 struct expression *get_argument_from_call_expr(struct expression_list *args, 368 int num); 369 370 char *expr_to_var(struct expression *expr); 371 struct symbol *expr_to_sym(struct expression *expr); 372 char *expr_to_str(struct expression *expr); 373 char *expr_to_str_sym(struct expression *expr, 374 struct symbol **sym_ptr); 375 char *expr_to_var_sym(struct expression *expr, 376 struct symbol **sym_ptr); 377 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym); 378 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl); 379 int get_complication_score(struct expression *expr); 380 381 int sym_name_is(const char *name, struct expression *expr); 382 int get_const_value(struct expression *expr, sval_t *sval); 383 int get_value(struct expression *expr, sval_t *val); 384 int get_implied_value(struct expression *expr, sval_t *val); 385 int get_implied_min(struct expression *expr, sval_t *sval); 386 int get_implied_max(struct expression *expr, sval_t *val); 387 int get_hard_max(struct expression *expr, sval_t *sval); 388 int get_fuzzy_min(struct expression *expr, sval_t *min); 389 int get_fuzzy_max(struct expression *expr, sval_t *max); 390 int get_absolute_min(struct expression *expr, sval_t *sval); 391 int get_absolute_max(struct expression *expr, sval_t *sval); 392 int parse_call_math(struct expression *expr, char *math, sval_t *val); 393 int parse_call_math_rl(struct expression *call, char *math, struct range_list **rl); 394 char *get_value_in_terms_of_parameter_math(struct expression *expr); 395 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym); 396 int is_zero(struct expression *expr); 397 int known_condition_true(struct expression *expr); 398 int known_condition_false(struct expression *expr); 399 int implied_condition_true(struct expression *expr); 400 int implied_condition_false(struct expression *expr); 401 int can_integer_overflow(struct symbol *type, struct expression *expr); 402 void clear_math_cache(void); 403 404 int is_array(struct expression *expr); 405 struct expression *get_array_base(struct expression *expr); 406 struct expression *get_array_offset(struct expression *expr); 407 const char *show_state(struct smatch_state *state); 408 struct statement *get_expression_statement(struct expression *expr); 409 struct expression *strip_parens(struct expression *expr); 410 struct expression *strip_expr(struct expression *expr); 411 struct expression *strip_expr_set_parent(struct expression *expr); 412 void scoped_state(int my_id, const char *name, struct symbol *sym); 413 int is_error_return(struct expression *expr); 414 int getting_address(void); 415 int get_struct_and_member(struct expression *expr, const char **type, const char **member); 416 char *get_member_name(struct expression *expr); 417 char *get_fnptr_name(struct expression *expr); 418 int cmp_pos(struct position pos1, struct position pos2); 419 int positions_eq(struct position pos1, struct position pos2); 420 struct statement *get_current_statement(void); 421 struct statement *get_prev_statement(void); 422 struct expression *get_last_expr_from_expression_stmt(struct expression *expr); 423 int get_param_num_from_sym(struct symbol *sym); 424 int get_param_num(struct expression *expr); 425 int ms_since(struct timeval *start); 426 int parent_is_gone_var_sym(const char *name, struct symbol *sym); 427 int parent_is_gone(struct expression *expr); 428 int invert_op(int op); 429 int expr_equiv(struct expression *one, struct expression *two); 430 void push_int(struct int_stack **stack, int num); 431 int pop_int(struct int_stack **stack); 432 433 /* smatch_type.c */ 434 struct symbol *get_real_base_type(struct symbol *sym); 435 int type_bytes(struct symbol *type); 436 int array_bytes(struct symbol *type); 437 struct symbol *get_pointer_type(struct expression *expr); 438 struct symbol *get_type(struct expression *expr); 439 struct symbol *get_final_type(struct expression *expr); 440 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right); 441 int type_signed(struct symbol *base_type); 442 int expr_unsigned(struct expression *expr); 443 int expr_signed(struct expression *expr); 444 int returns_unsigned(struct symbol *base_type); 445 int is_pointer(struct expression *expr); 446 int returns_pointer(struct symbol *base_type); 447 sval_t sval_type_max(struct symbol *base_type); 448 sval_t sval_type_min(struct symbol *base_type); 449 int nr_bits(struct expression *expr); 450 int is_void_pointer(struct expression *expr); 451 int is_char_pointer(struct expression *expr); 452 int is_string(struct expression *expr); 453 int is_static(struct expression *expr); 454 int is_local_variable(struct expression *expr); 455 int types_equiv(struct symbol *one, struct symbol *two); 456 int fn_static(void); 457 const char *global_static(); 458 struct symbol *cur_func_return_type(void); 459 struct symbol *get_arg_type(struct expression *fn, int arg); 460 struct symbol *get_member_type_from_key(struct expression *expr, const char *key); 461 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key); 462 int is_struct(struct expression *expr); 463 char *type_to_str(struct symbol *type); 464 465 /* smatch_ignore.c */ 466 void add_ignore(int owner, const char *name, struct symbol *sym); 467 int is_ignored(int owner, const char *name, struct symbol *sym); 468 void add_ignore_expr(int owner, struct expression *expr); 469 int is_ignored_expr(int owner, struct expression *expr); 470 471 /* smatch_var_sym */ 472 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym); 473 struct var_sym_list *expr_to_vsl(struct expression *expr); 474 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym); 475 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr); 476 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym); 477 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym); 478 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl); 479 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src); 480 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two); 481 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two); 482 void free_var_sym_list(struct var_sym_list **list); 483 void free_var_syms_and_list(struct var_sym_list **list); 484 485 /* smatch_tracker */ 486 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym); 487 void add_tracker(struct tracker_list **list, int owner, const char *name, 488 struct symbol *sym); 489 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr); 490 void del_tracker(struct tracker_list **list, int owner, const char *name, 491 struct symbol *sym); 492 int in_tracker_list(struct tracker_list *list, int owner, const char *name, 493 struct symbol *sym); 494 void free_tracker_list(struct tracker_list **list); 495 void free_trackers_and_list(struct tracker_list **list); 496 497 /* smatch_conditions */ 498 int in_condition(void); 499 500 /* smatch_flow.c */ 501 502 extern int __in_fake_assign; 503 extern int __in_fake_parameter_assign; 504 extern int __in_fake_struct_assign; 505 extern int in_fake_env; 506 void smatch (int argc, char **argv); 507 int inside_loop(void); 508 int definitely_inside_loop(void); 509 struct expression *get_switch_expr(void); 510 int in_expression_statement(void); 511 void __process_post_op_stack(void); 512 void __split_expr(struct expression *expr); 513 void __split_label_stmt(struct statement *stmt); 514 void __split_stmt(struct statement *stmt); 515 extern int __in_function_def; 516 extern int option_assume_loops; 517 extern int option_two_passes; 518 extern int option_no_db; 519 extern int option_file_output; 520 extern int option_time; 521 extern struct expression_list *big_expression_stack; 522 extern struct expression_list *big_condition_stack; 523 extern struct statement_list *big_statement_stack; 524 int is_assigned_call(struct expression *expr); 525 int inlinable(struct expression *expr); 526 extern int __inline_call; 527 extern struct expression *__inline_fn; 528 extern int __in_pre_condition; 529 extern int __bail_on_rest_of_function; 530 extern struct statement *__prev_stmt; 531 extern struct statement *__cur_stmt; 532 extern struct statement *__next_stmt; 533 void init_fake_env(void); 534 void end_fake_env(void); 535 int time_parsing_function(void); 536 537 /* smatch_struct_assignment.c */ 538 struct expression *get_faked_expression(void); 539 void __fake_struct_member_assignments(struct expression *expr); 540 541 /* smatch_project.c */ 542 int is_no_inline_function(const char *function); 543 544 /* smatch_conditions */ 545 void __split_whole_condition(struct expression *expr); 546 void __handle_logic(struct expression *expr); 547 int is_condition(struct expression *expr); 548 int __handle_condition_assigns(struct expression *expr); 549 int __handle_select_assigns(struct expression *expr); 550 int __handle_expr_statement_assigns(struct expression *expr); 551 552 /* smatch_implied.c */ 553 extern int option_debug_implied; 554 extern int option_debug_related; 555 struct range_list_stack; 556 void param_limit_implications(struct expression *expr, int param, char *key, char *value); 557 struct stree *__implied_case_stree(struct expression *switch_expr, 558 struct range_list *case_rl, 559 struct range_list_stack **remaining_cases, 560 struct stree **raw_stree); 561 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm); 562 int assume(struct expression *expr); 563 void end_assume(void); 564 int impossible_assumption(struct expression *left, int op, sval_t sval); 565 566 /* smatch_extras.c */ 567 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */ 568 extern int RETURN_ID; 569 570 struct data_range { 571 sval_t min; 572 sval_t max; 573 }; 574 575 #define MTAG_ALIAS_BIT (1ULL << 63) 576 #define MTAG_OFFSET_MASK 0xfffULL 577 578 extern long long valid_ptr_min, valid_ptr_max; 579 extern sval_t valid_ptr_min_sval, valid_ptr_max_sval; 580 extern struct range_list *valid_ptr_rl; 581 static const sval_t array_min_sval = { 582 .type = &ptr_ctype, 583 {.value = 100000}, 584 }; 585 static const sval_t array_max_sval = { 586 .type = &ptr_ctype, 587 {.value = 199999}, 588 }; 589 static const sval_t text_seg_min = { 590 .type = &ptr_ctype, 591 {.value = 100000000}, 592 }; 593 static const sval_t text_seg_max = { 594 .type = &ptr_ctype, 595 {.value = 177777777}, 596 }; 597 static const sval_t data_seg_min = { 598 .type = &ptr_ctype, 599 {.value = 200000000}, 600 }; 601 static const sval_t data_seg_max = { 602 .type = &ptr_ctype, 603 {.value = 277777777}, 604 }; 605 static const sval_t bss_seg_min = { 606 .type = &ptr_ctype, 607 {.value = 300000000}, 608 }; 609 static const sval_t bss_seg_max = { 610 .type = &ptr_ctype, 611 {.value = 377777777}, 612 }; 613 static const sval_t stack_seg_min = { 614 .type = &ptr_ctype, 615 {.value = 400000000}, 616 }; 617 static const sval_t stack_seg_max = { 618 .type = &ptr_ctype, 619 {.value = 477777777}, 620 }; 621 static const sval_t kmalloc_seg_min = { 622 .type = &ptr_ctype, 623 {.value = 500000000}, 624 }; 625 static const sval_t kmalloc_seg_max = { 626 .type = &ptr_ctype, 627 {.value = 577777777}, 628 }; 629 static const sval_t vmalloc_seg_min = { 630 .type = &ptr_ctype, 631 {.value = 600000000}, 632 }; 633 static const sval_t vmalloc_seg_max = { 634 .type = &ptr_ctype, 635 {.value = 677777777}, 636 }; 637 static const sval_t fn_ptr_min = { 638 .type = &ptr_ctype, 639 {.value = 700000000}, 640 }; 641 static const sval_t fn_ptr_max = { 642 .type = &ptr_ctype, 643 {.value = 777777777}, 644 }; 645 646 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym); 647 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym); 648 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym); 649 char *map_long_to_short_name_sym_nostack(const char *name, struct symbol *sym, struct symbol **new_sym); 650 651 #define STRLEN_MAX_RET 1010101 652 653 /* smatch_absolute.c */ 654 int get_absolute_min_helper(struct expression *expr, sval_t *sval); 655 int get_absolute_max_helper(struct expression *expr, sval_t *sval); 656 657 /* smatch_local_values.c */ 658 int get_local_rl(struct expression *expr, struct range_list **rl); 659 int get_local_max_helper(struct expression *expr, sval_t *sval); 660 int get_local_min_helper(struct expression *expr, sval_t *sval); 661 662 /* smatch_type_value.c */ 663 int get_db_type_rl(struct expression *expr, struct range_list **rl); 664 /* smatch_data_val.c */ 665 int get_mtag_rl(struct expression *expr, struct range_list **rl); 666 /* smatch_array_values.c */ 667 int get_array_rl(struct expression *expr, struct range_list **rl); 668 669 /* smatch_states.c */ 670 void __swap_cur_stree(struct stree *stree); 671 void __push_fake_cur_stree(); 672 struct stree *__pop_fake_cur_stree(); 673 void __free_fake_cur_stree(); 674 void __set_fake_cur_stree_fast(struct stree *stree); 675 void __pop_fake_cur_stree_fast(void); 676 void __merge_stree_into_cur(struct stree *stree); 677 678 int unreachable(void); 679 void __set_sm(struct sm_state *sm); 680 void __set_sm_cur_stree(struct sm_state *sm); 681 void __set_sm_fake_stree(struct sm_state *sm); 682 void __set_true_false_sm(struct sm_state *true_state, 683 struct sm_state *false_state); 684 void nullify_path(void); 685 void __match_nullify_path_hook(const char *fn, struct expression *expr, 686 void *unused); 687 void __unnullify_path(void); 688 int __path_is_null(void); 689 void save_all_states(void); 690 void restore_all_states(void); 691 void free_goto_stack(void); 692 void clear_all_states(void); 693 694 struct sm_state *get_sm_state(int owner, const char *name, 695 struct symbol *sym); 696 struct sm_state *get_sm_state_expr(int owner, struct expression *expr); 697 void __push_true_states(void); 698 void __use_false_states(void); 699 void __discard_false_states(void); 700 void __merge_false_states(void); 701 void __merge_true_states(void); 702 703 void __negate_cond_stacks(void); 704 void __use_pre_cond_states(void); 705 void __use_cond_true_states(void); 706 void __use_cond_false_states(void); 707 void __push_cond_stacks(void); 708 void __fold_in_set_states(void); 709 void __free_set_states(void); 710 struct stree *__copy_cond_true_states(void); 711 struct stree *__copy_cond_false_states(void); 712 struct stree *__pop_cond_true_stack(void); 713 struct stree *__pop_cond_false_stack(void); 714 void __and_cond_states(void); 715 void __or_cond_states(void); 716 void __save_pre_cond_states(void); 717 void __discard_pre_cond_states(void); 718 struct stree *__get_true_states(void); 719 struct stree *__get_false_states(void); 720 void __use_cond_states(void); 721 extern struct state_list *__last_base_slist; 722 723 void __push_continues(void); 724 void __discard_continues(void); 725 void __process_continues(void); 726 void __merge_continues(void); 727 728 void __push_breaks(void); 729 void __process_breaks(void); 730 int __has_breaks(void); 731 void __merge_breaks(void); 732 void __use_breaks(void); 733 734 void __save_switch_states(struct expression *switch_expr); 735 void __discard_switches(void); 736 int have_remaining_cases(void); 737 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl); 738 void __push_default(void); 739 void __set_default(void); 740 int __pop_default(void); 741 742 void __push_conditions(void); 743 void __discard_conditions(void); 744 745 void __save_gotos(const char *name, struct symbol *sym); 746 void __merge_gotos(const char *name, struct symbol *sym); 747 748 void __print_cur_stree(void); 749 750 /* smatch_hooks.c */ 751 void __pass_to_client(void *data, enum hook_type type); 752 void __pass_to_client_no_data(enum hook_type type); 753 void __pass_case_to_client(struct expression *switch_expr, 754 struct range_list *rl); 755 int __has_merge_function(int client_id); 756 struct smatch_state *__client_merge_function(int owner, 757 struct smatch_state *s1, 758 struct smatch_state *s2); 759 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm); 760 void call_pre_merge_hook(struct sm_state *sm); 761 void __push_scope_hooks(void); 762 void __call_scope_hooks(void); 763 764 /* smatch_function_hooks.c */ 765 void create_function_hook_hash(void); 766 void __match_initializer_call(struct symbol *sym); 767 768 /* smatch_db.c */ 769 enum info_type { 770 INTERNAL = 0, 771 /* 772 * Changing these numbers is a pain. Don't do it. If you ever use a 773 * number it can't be re-used right away so there may be gaps. 774 * We select these in order by type so if the order matters, then give 775 * it a number below 100-999,9000-9999 ranges. */ 776 777 PARAM_CLEARED = 101, 778 PARAM_LIMIT = 103, 779 PARAM_FILTER = 104, 780 781 PARAM_VALUE = 1001, 782 BUF_SIZE = 1002, 783 USER_DATA = 1003, 784 CAPPED_DATA = 1004, 785 RETURN_VALUE = 1005, 786 DEREFERENCE = 1006, 787 RANGE_CAP = 1007, 788 LOCK_HELD = 1008, 789 LOCK_RELEASED = 1009, 790 ABSOLUTE_LIMITS = 1010, 791 PARAM_ADD = 1012, 792 PARAM_FREED = 1013, 793 DATA_SOURCE = 1014, 794 FUZZY_MAX = 1015, 795 STR_LEN = 1016, 796 ARRAY_LEN = 1017, 797 CAPABLE = 1018, 798 NS_CAPABLE = 1019, 799 CONTAINER = 1020, 800 CASTED_CALL = 1021, 801 TYPE_LINK = 1022, 802 UNTRACKED_PARAM = 1023, 803 CULL_PATH = 1024, 804 PARAM_SET = 1025, 805 PARAM_USED = 1026, 806 BYTE_UNITS = 1027, 807 COMPARE_LIMIT = 1028, 808 PARAM_COMPARE = 1029, 809 CONSTRAINT = 1031, 810 PASSES_TYPE = 1032, 811 CONSTRAINT_REQUIRED = 1033, 812 NOSPEC = 1035, 813 NOSPEC_WB = 1036, 814 STMT_CNT = 1037, 815 TERMINATED = 1038, 816 817 /* put random temporary stuff in the 7000-7999 range for testing */ 818 USER_DATA3 = 8017, 819 USER_DATA3_SET = 9017, 820 NO_OVERFLOW = 8018, 821 NO_OVERFLOW_SIMPLE = 8019, 822 LOCKED = 8020, 823 UNLOCKED = 8021, 824 SET_FS = 8022, 825 ATOMIC_INC = 8023, 826 ATOMIC_DEC = 8024, 827 NO_SIDE_EFFECT = 8025, 828 FN_ARG_LINK = 8028, 829 DATA_VALUE = 8029, 830 ARRAYSIZE_ARG = 8033, 831 SIZEOF_ARG = 8034, 832 MEMORY_TAG = 8036, 833 MTAG_ASSIGN = 8035, 834 STRING_VALUE = 8041, 835 }; 836 837 extern struct sqlite3 *smatch_db; 838 extern struct sqlite3 *mem_db; 839 extern struct sqlite3 *cache_db; 840 841 void db_ignore_states(int id); 842 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type); 843 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm)); 844 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr)); 845 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)); 846 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value)); 847 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value)); 848 struct range_list *db_return_vals(struct expression *expr); 849 struct range_list *db_return_vals_from_str(const char *fn_name); 850 char *return_state_to_var_sym(struct expression *expr, int param, const char *key, struct symbol **sym); 851 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl); 852 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym); 853 const char *state_name_to_param_name(const char *state_name, const char *param_name); 854 const char *get_param_name_var_sym(const char *name, struct symbol *sym); 855 const char *get_param_name(struct sm_state *sm); 856 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym); 857 const char *get_mtag_name_expr(struct expression *expr); 858 char *get_data_info_name(struct expression *expr); 859 860 char *escape_newlines(const char *str); 861 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql); 862 863 #define sql_helper(db, call_back, data, sql...) \ 864 do { \ 865 char sql_txt[1024]; \ 866 \ 867 sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql); \ 868 sm_debug("debug: %s\n", sql_txt); \ 869 sql_exec(db, call_back, data, sql_txt); \ 870 } while (0) 871 872 873 #define run_sql(call_back, data, sql...) \ 874 do { \ 875 if (option_no_db) \ 876 break; \ 877 sql_helper(smatch_db, call_back, data, sql); \ 878 } while (0) 879 880 #define mem_sql(call_back, data, sql...) \ 881 sql_helper(mem_db, call_back, data, sql) 882 883 #define cache_sql(call_back, data, sql...) \ 884 sql_helper(cache_db, call_back, data, sql) 885 886 #define sql_insert_helper(table, db, ignore, late, values...) \ 887 do { \ 888 struct sqlite3 *_db = db; \ 889 \ 890 if (__inline_fn && !_db) \ 891 _db = mem_db; \ 892 if (_db) { \ 893 char buf[1024]; \ 894 char *err, *p = buf; \ 895 int rc; \ 896 \ 897 p += snprintf(p, buf + sizeof(buf) - p, \ 898 "insert %sinto %s values (", \ 899 ignore ? "or ignore " : "", #table); \ 900 p += snprintf(p, buf + sizeof(buf) - p, values); \ 901 p += snprintf(p, buf + sizeof(buf) - p, ");"); \ 902 sm_debug("mem-db: %s\n", buf); \ 903 rc = sqlite3_exec(_db, buf, NULL, NULL, &err); \ 904 if (rc != SQLITE_OK) { \ 905 sm_ierror("SQL error #2: %s", err); \ 906 sm_ierror("SQL: '%s'", buf); \ 907 parse_error = 1; \ 908 } \ 909 break; \ 910 } \ 911 if (option_info) { \ 912 FILE *tmp_fd = sm_outfd; \ 913 sm_outfd = sql_outfd; \ 914 sm_prefix(); \ 915 sm_printf("SQL%s: insert %sinto " #table " values(", \ 916 late ? "_late" : "", ignore ? "or ignore " : ""); \ 917 sm_printf(values); \ 918 sm_printf(");\n"); \ 919 sm_outfd = tmp_fd; \ 920 } \ 921 } while (0) 922 923 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, 0, values); 924 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 0, 1, 0, values); 925 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 0, 1, values); 926 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values); 927 928 char *get_static_filter(struct symbol *sym); 929 930 void sql_insert_return_states(int return_id, const char *return_ranges, 931 int type, int param, const char *key, const char *value); 932 void sql_insert_caller_info(struct expression *call, int type, int param, 933 const char *key, const char *value); 934 void sql_insert_function_ptr(const char *fn, const char *struct_name); 935 void sql_insert_return_values(const char *return_values); 936 void sql_insert_return_implies(int type, int param, const char *key, const char *value); 937 void sql_insert_function_type_size(const char *member, const char *ranges); 938 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value); 939 void sql_insert_type_info(int type, const char *member, const char *value); 940 void sql_insert_local_values(const char *name, const char *value); 941 void sql_insert_function_type_value(const char *type, const char *value); 942 void sql_insert_function_type(int param, const char *value); 943 void sql_insert_parameter_name(int param, const char *value); 944 void sql_insert_data_info(struct expression *data, int type, const char *value); 945 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value); 946 void sql_save_constraint(const char *con); 947 void sql_save_constraint_required(const char *data, int op, const char *limit); 948 void sql_copy_constraint_required(const char *new_limit, const char *old_limit); 949 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data); 950 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value); 951 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name); 952 void insert_mtag_data(sval_t sval, struct range_list *rl); 953 void sql_insert_mtag_map(mtag_t tag, int offset, mtag_t container); 954 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias); 955 int mtag_map_select_container(mtag_t tag, int offset, mtag_t *container); 956 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag); 957 958 void sql_select_return_states(const char *cols, struct expression *call, 959 int (*callback)(void*, int, char**, char**), void *info); 960 void sql_select_call_implies(const char *cols, struct expression *call, 961 int (*callback)(void*, int, char**, char**)); 962 963 void open_smatch_db(char *db_file); 964 965 /* smatch_files.c */ 966 int open_data_file(const char *filename); 967 int open_schema_file(const char *schema); 968 struct token *get_tokens_file(const char *filename); 969 970 /* smatch.c */ 971 extern char *option_debug_check; 972 extern char *option_project_str; 973 extern char *bin_dir; 974 extern char *data_dir; 975 extern int option_no_data; 976 extern int option_full_path; 977 extern int option_param_mapper; 978 extern int option_call_tree; 979 extern int num_checks; 980 981 enum project_type { 982 PROJ_NONE, 983 PROJ_KERNEL, 984 PROJ_WINE, 985 PROJ_ILLUMOS_KERNEL, 986 PROJ_ILLUMOS_USER, 987 PROJ_UNKNOWN, 988 }; 989 extern enum project_type option_project; 990 const char *check_name(unsigned short id); 991 int id_from_name(const char *name); 992 993 994 /* smatch_buf_size.c */ 995 int get_array_size(struct expression *expr); 996 int get_array_size_bytes(struct expression *expr); 997 int get_array_size_bytes_min(struct expression *expr); 998 int get_array_size_bytes_max(struct expression *expr); 999 struct range_list *get_array_size_bytes_rl(struct expression *expr); 1000 int get_real_array_size(struct expression *expr); 1001 int last_member_is_resizable(struct symbol *type); 1002 /* smatch_strlen.c */ 1003 int get_implied_strlen(struct expression *expr, struct range_list **rl); 1004 int get_size_from_strlen(struct expression *expr); 1005 1006 /* smatch_capped.c */ 1007 int is_capped(struct expression *expr); 1008 int is_capped_var_sym(const char *name, struct symbol *sym); 1009 1010 /* check_user_data.c */ 1011 int is_user_macro(struct expression *expr); 1012 int is_user_data(struct expression *expr); 1013 int is_capped_user_data(struct expression *expr); 1014 int implied_user_data(struct expression *expr, struct range_list **rl); 1015 struct stree *get_user_stree(void); 1016 int get_user_rl(struct expression *expr, struct range_list **rl); 1017 int get_user_rl_spammy(struct expression *expr, struct range_list **rl); 1018 int is_user_rl(struct expression *expr); 1019 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl); 1020 1021 /* check_locking.c */ 1022 void print_held_locks(); 1023 1024 /* check_assigned_expr.c */ 1025 struct expression *get_assigned_expr(struct expression *expr); 1026 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym); 1027 /* smatch_return_to_param.c */ 1028 void __add_return_to_param_mapping(struct expression *assign, const char *return_string); 1029 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym); 1030 1031 /* smatch_comparison.c */ 1032 struct compare_data { 1033 /* The ->left and ->right expression pointers might be NULL (I'm lazy) */ 1034 struct expression *left; 1035 const char *left_var; 1036 struct var_sym_list *left_vsl; 1037 int comparison; 1038 struct expression *right; 1039 const char *right_var; 1040 struct var_sym_list *right_vsl; 1041 }; 1042 DECLARE_ALLOCATOR(compare_data); 1043 struct smatch_state *alloc_compare_state( 1044 struct expression *left, 1045 const char *left_var, struct var_sym_list *left_vsl, 1046 int comparison, 1047 struct expression *right, 1048 const char *right_var, struct var_sym_list *right_vsl); 1049 int filter_comparison(int orig, int op); 1050 int merge_comparisons(int one, int two); 1051 int combine_comparisons(int left_compare, int right_compare); 1052 int state_to_comparison(struct smatch_state *state); 1053 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2); 1054 int get_comparison(struct expression *left, struct expression *right); 1055 int get_comparison_strings(const char *one, const char *two); 1056 int possible_comparison(struct expression *a, int comparison, struct expression *b); 1057 struct state_list *get_all_comparisons(struct expression *expr); 1058 struct state_list *get_all_possible_equal_comparisons(struct expression *expr); 1059 void __add_return_comparison(struct expression *call, const char *range); 1060 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range); 1061 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym); 1062 char *name_sym_to_param_comparison(const char *name, struct symbol *sym); 1063 char *expr_equal_to_param(struct expression *expr, int ignore); 1064 char *expr_lte_to_param(struct expression *expr, int ignore); 1065 char *expr_param_comparison(struct expression *expr, int ignore); 1066 int flip_comparison(int op); 1067 int negate_comparison(int op); 1068 int remove_unsigned_from_comparison(int op); 1069 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value); 1070 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right); 1071 struct sm_state *comparison_implication_hook(struct expression *expr, 1072 struct state_list **true_stack, 1073 struct state_list **false_stack); 1074 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr, 1075 const char *state_name, 1076 struct smatch_state *true_state, struct smatch_state *false_state); 1077 int impossibly_high_comparison(struct expression *expr); 1078 1079 /* smatch_sval.c */ 1080 sval_t *sval_alloc(sval_t sval); 1081 sval_t *sval_alloc_permanent(sval_t sval); 1082 sval_t sval_blank(struct expression *expr); 1083 sval_t sval_type_val(struct symbol *type, long long val); 1084 sval_t sval_from_val(struct expression *expr, long long val); 1085 int sval_is_ptr(sval_t sval); 1086 int sval_unsigned(sval_t sval); 1087 int sval_signed(sval_t sval); 1088 int sval_bits(sval_t sval); 1089 int sval_bits_used(sval_t sval); 1090 int sval_is_negative(sval_t sval); 1091 int sval_is_positive(sval_t sval); 1092 int sval_is_min(sval_t sval); 1093 int sval_is_max(sval_t sval); 1094 int sval_is_a_min(sval_t sval); 1095 int sval_is_a_max(sval_t sval); 1096 int sval_is_negative_min(sval_t sval); 1097 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two); 1098 int sval_cmp_val(sval_t one, long long val); 1099 sval_t sval_min(sval_t one, sval_t two); 1100 sval_t sval_max(sval_t one, sval_t two); 1101 int sval_too_low(struct symbol *type, sval_t sval); 1102 int sval_too_high(struct symbol *type, sval_t sval); 1103 int sval_fits(struct symbol *type, sval_t sval); 1104 sval_t sval_cast(struct symbol *type, sval_t sval); 1105 sval_t sval_preop(sval_t sval, int op); 1106 sval_t sval_binop(sval_t left, int op, sval_t right); 1107 int sval_binop_overflows(sval_t left, int op, sval_t right); 1108 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right); 1109 unsigned long long fls_mask(unsigned long long uvalue); 1110 unsigned long long sval_fls_mask(sval_t sval); 1111 const char *sval_to_str(sval_t sval); 1112 const char *sval_to_numstr(sval_t sval); 1113 sval_t ll_to_sval(long long val); 1114 1115 /* smatch_string_list.c */ 1116 int list_has_string(struct string_list *str_list, const char *str); 1117 void insert_string(struct string_list **str_list, const char *str); 1118 struct string_list *clone_str_list(struct string_list *orig); 1119 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two); 1120 1121 /* smatch_start_states.c */ 1122 struct stree *get_start_states(void); 1123 1124 /* smatch_recurse.c */ 1125 int has_symbol(struct expression *expr, struct symbol *sym); 1126 int has_variable(struct expression *expr, struct expression *var); 1127 int has_inc_dec(struct expression *expr); 1128 1129 /* smatch_stored_conditions.c */ 1130 struct smatch_state *get_stored_condition(struct expression *expr); 1131 struct expression_list *get_conditions(struct expression *expr); 1132 struct sm_state *stored_condition_implication_hook(struct expression *expr, 1133 struct state_list **true_stack, 1134 struct state_list **false_stack); 1135 1136 /* check_string_len.c */ 1137 int get_formatted_string_size(struct expression *call, int arg); 1138 1139 /* smatch_param_set.c */ 1140 int param_was_set(struct expression *expr); 1141 int param_was_set_var_sym(const char *name, struct symbol *sym); 1142 /* smatch_param_filter.c */ 1143 int param_has_filter_data(struct sm_state *sm); 1144 1145 /* smatch_links.c */ 1146 void set_up_link_functions(int id, int linkid); 1147 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2); 1148 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym); 1149 1150 /* smatch_auto_copy.c */ 1151 void set_auto_copy(int owner); 1152 1153 /* check_buf_comparison */ 1154 struct expression *get_size_variable(struct expression *buf); 1155 struct expression *get_array_variable(struct expression *size); 1156 1157 /* smatch_untracked_param.c */ 1158 void mark_untracked(struct expression *expr, int param, const char *key, const char *value); 1159 void add_untracked_param_hook(void (func)(struct expression *call, int param)); 1160 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr); 1161 1162 /* smatch_strings.c */ 1163 struct state_list *get_strings(struct expression *expr); 1164 struct expression *fake_string_from_mtag(mtag_t tag); 1165 1166 /* smatch_estate.c */ 1167 int estate_get_single_value(struct smatch_state *state, sval_t *sval); 1168 1169 /* smatch_address.c */ 1170 int get_address_rl(struct expression *expr, struct range_list **rl); 1171 int get_member_offset(struct symbol *type, const char *member_name); 1172 int get_member_offset_from_deref(struct expression *expr); 1173 1174 /* for now this is in smatch_used_parameter.c */ 1175 void __get_state_hook(int owner, const char *name, struct symbol *sym); 1176 1177 /* smatch_buf_comparison.c */ 1178 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl); 1179 1180 struct stree *get_all_return_states(void); 1181 struct stree_stack *get_all_return_strees(void); 1182 int on_atomic_dec_path(void); 1183 int was_inced(const char *name, struct symbol *sym); 1184 1185 /* smatch_constraints.c */ 1186 char *get_constraint_str(struct expression *expr); 1187 struct constraint_list *get_constraints(struct expression *expr); 1188 char *unmet_constraint(struct expression *data, struct expression *offset); 1189 char *get_required_constraint(const char *data_str); 1190 1191 /* smatch_container_of.c */ 1192 int get_param_from_container_of(struct expression *expr); 1193 int get_offset_from_container_of(struct expression *expr); 1194 1195 /* smatch_mtag.c */ 1196 int get_string_mtag(struct expression *expr, mtag_t *tag); 1197 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag); 1198 int get_mtag(struct expression *expr, mtag_t *tag); 1199 int get_mtag_offset(struct expression *expr, mtag_t *tag, int *offset); 1200 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new); 1201 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset); 1202 void update_mtag_data(struct expression *expr); 1203 int get_mtag_sval(struct expression *expr, sval_t *sval); 1204 int get_mtag_addr_sval(struct expression *expr, sval_t *sval); 1205 1206 /* Trinity fuzzer stuff */ 1207 const char *get_syscall_arg_type(struct symbol *sym); 1208 1209 /* smatch_mem_tracker.c */ 1210 extern int option_mem; 1211 unsigned long get_max_memory(void); 1212 1213 /* check_is_nospec.c */ 1214 bool is_nospec(struct expression *expr); 1215 1216 /* smatch_nul_terminator.c */ 1217 bool is_nul_terminated(struct expression *expr); 1218 1219 static inline int type_bits(struct symbol *type) 1220 { 1221 if (!type) 1222 return 0; 1223 if (type->type == SYM_PTR) /* Sparse doesn't set this for &pointers */ 1224 return bits_in_pointer; 1225 if (type->type == SYM_ARRAY) 1226 return bits_in_pointer; 1227 if (!type->examined) 1228 examine_symbol_type(type); 1229 return type->bit_size; 1230 } 1231 1232 static inline bool type_is_ptr(struct symbol *type) 1233 { 1234 return type && (type->type == SYM_PTR || type->type == SYM_ARRAY); 1235 } 1236 1237 static inline int type_unsigned(struct symbol *base_type) 1238 { 1239 if (!base_type) 1240 return 0; 1241 if (base_type->ctype.modifiers & MOD_UNSIGNED) 1242 return 1; 1243 return 0; 1244 } 1245 1246 static inline int type_positive_bits(struct symbol *type) 1247 { 1248 if (!type) 1249 return 0; 1250 if (type->type == SYM_ARRAY) 1251 return bits_in_pointer - 1; 1252 if (type_unsigned(type)) 1253 return type_bits(type); 1254 return type_bits(type) - 1; 1255 } 1256 1257 static inline int sval_positive_bits(sval_t sval) 1258 { 1259 return type_positive_bits(sval.type); 1260 } 1261 1262 /* 1263 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger. 1264 */ 1265 static inline int sval_cmp(sval_t one, sval_t two) 1266 { 1267 struct symbol *type; 1268 1269 type = one.type; 1270 if (sval_positive_bits(two) > sval_positive_bits(one)) 1271 type = two.type; 1272 if (type_bits(type) < 31) 1273 type = &int_ctype; 1274 1275 one = sval_cast(type, one); 1276 two = sval_cast(type, two); 1277 1278 if (type_unsigned(type)) { 1279 if (one.uvalue < two.uvalue) 1280 return -1; 1281 if (one.uvalue == two.uvalue) 1282 return 0; 1283 return 1; 1284 } 1285 /* fix me handle type promotion and unsigned values */ 1286 if (one.value < two.value) 1287 return -1; 1288 if (one.value == two.value) 1289 return 0; 1290 return 1; 1291 } 1292 1293 #endif /* !SMATCH_H_ */ 1294