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