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