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 short skip_implications:1; 83 unsigned int nr_children; 84 unsigned int line; 85 struct smatch_state *state; 86 struct stree *pool; 87 struct sm_state *left; 88 struct sm_state *right; 89 struct state_list *possible; 90 }; 91 92 struct var_sym { 93 char *var; 94 struct symbol *sym; 95 }; 96 DECLARE_ALLOCATOR(var_sym); 97 DECLARE_PTR_LIST(var_sym_list, struct var_sym); 98 99 struct constraint { 100 int op; 101 int id; 102 }; 103 DECLARE_PTR_LIST(constraint_list, struct constraint); 104 105 enum hook_type { 106 EXPR_HOOK, 107 STMT_HOOK, 108 STMT_HOOK_AFTER, 109 SYM_HOOK, 110 STRING_HOOK, 111 DECLARATION_HOOK, 112 ASSIGNMENT_HOOK, 113 ASSIGNMENT_HOOK_AFTER, 114 RAW_ASSIGNMENT_HOOK, 115 GLOBAL_ASSIGNMENT_HOOK, 116 LOGIC_HOOK, 117 CONDITION_HOOK, 118 PRELOOP_HOOK, 119 SELECT_HOOK, 120 WHOLE_CONDITION_HOOK, 121 FUNCTION_CALL_HOOK_BEFORE, 122 FUNCTION_CALL_HOOK, 123 CALL_HOOK_AFTER_INLINE, 124 FUNCTION_CALL_HOOK_AFTER_DB, 125 CALL_ASSIGNMENT_HOOK, 126 MACRO_ASSIGNMENT_HOOK, 127 BINOP_HOOK, 128 OP_HOOK, 129 DEREF_HOOK, 130 CASE_HOOK, 131 ASM_HOOK, 132 CAST_HOOK, 133 SIZEOF_HOOK, 134 BASE_HOOK, 135 FUNC_DEF_HOOK, 136 AFTER_DEF_HOOK, 137 END_FUNC_HOOK, 138 AFTER_FUNC_HOOK, 139 RETURN_HOOK, 140 INLINE_FN_START, 141 INLINE_FN_END, 142 END_FILE_HOOK, 143 NUM_HOOKS, 144 }; 145 146 #define TRUE 1 147 #define FALSE 0 148 149 struct range_list; 150 151 void add_hook(void *func, enum hook_type type); 152 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2); 153 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state); 154 void add_merge_hook(int client_id, merge_func_t *func); 155 void add_unmatched_state_hook(int client_id, unmatched_func_t *func); 156 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *sm)); 157 typedef void (scope_hook)(void *data); 158 void add_scope_hook(scope_hook *hook, void *data); 159 typedef void (func_hook)(const char *fn, struct expression *expr, void *data); 160 typedef void (implication_hook)(const char *fn, struct expression *call_expr, 161 struct expression *assign_expr, void *data); 162 typedef void (return_implies_hook)(struct expression *call_expr, 163 int param, char *key, char *value); 164 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl); 165 void add_function_hook(const char *look_for, func_hook *call_back, void *data); 166 167 void add_function_assign_hook(const char *look_for, func_hook *call_back, 168 void *info); 169 void add_implied_return_hook(const char *look_for, 170 implied_return_hook *call_back, 171 void *info); 172 void add_macro_assign_hook(const char *look_for, func_hook *call_back, 173 void *info); 174 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back, 175 void *info); 176 void return_implies_state(const char *look_for, long long start, long long end, 177 implication_hook *call_back, void *info); 178 void select_return_states_hook(int type, return_implies_hook *callback); 179 void select_return_states_before(void (*fn)(void)); 180 void select_return_states_after(void (*fn)(void)); 181 int get_implied_return(struct expression *expr, struct range_list **rl); 182 void allocate_hook_memory(void); 183 184 struct modification_data { 185 struct smatch_state *prev; 186 struct expression *cur; 187 }; 188 189 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr); 190 void add_modification_hook(int owner, modification_hook *call_back); 191 void add_modification_hook_late(int owner, modification_hook *call_back); 192 struct smatch_state *get_modification_state(struct expression *expr); 193 194 int outside_of_function(void); 195 const char *get_filename(void); 196 const char *get_base_file(void); 197 char *get_function(void); 198 int get_lineno(void); 199 extern int final_pass; 200 extern struct symbol *cur_func_sym; 201 extern int option_debug; 202 extern int local_debug; 203 extern int option_info; 204 extern int option_spammy; 205 extern int option_timeout; 206 extern char *trace_variable; 207 extern struct stree *global_states; 208 int is_skipped_function(void); 209 int is_silenced_function(void); 210 211 /* smatch_impossible.c */ 212 int is_impossible_path(void); 213 void set_path_impossible(void); 214 215 extern FILE *sm_outfd; 216 extern FILE *sql_outfd; 217 extern FILE *caller_info_fd; 218 extern int sm_nr_checks; 219 extern int sm_nr_errors; 220 extern const char *progname; 221 222 /* 223 * How to use these routines: 224 * 225 * sm_fatal(): an internal error of some kind that should immediately exit 226 * sm_ierror(): an internal error 227 * sm_perror(): an internal error from parsing input source 228 * sm_error(): an error from input source 229 * sm_warning(): a warning from input source 230 * sm_info(): info message (from option_info) 231 * sm_debug(): debug message 232 * sm_msg(): other message (please avoid using this) 233 */ 234 235 #define sm_printf(msg...) do { if (final_pass || option_debug || local_debug) fprintf(sm_outfd, msg); } while (0) 236 237 static inline void sm_prefix(void) 238 { 239 sm_printf("%s: %s:%d %s() ", progname, get_filename(), get_lineno(), get_function()); 240 } 241 242 static inline void print_implied_debug_msg(); 243 244 extern bool __silence_warnings_for_stmt; 245 246 #define sm_print_msg(type, msg...) \ 247 do { \ 248 print_implied_debug_msg(); \ 249 if (!final_pass && !option_debug && !local_debug) \ 250 break; \ 251 if (__silence_warnings_for_stmt && !option_debug && !local_debug) \ 252 break; \ 253 if (!option_info && is_silenced_function()) \ 254 break; \ 255 sm_prefix(); \ 256 if (type == 1) { \ 257 sm_printf("warn: "); \ 258 sm_nr_checks++; \ 259 } else if (type == 2) { \ 260 sm_printf("error: "); \ 261 sm_nr_checks++; \ 262 } else if (type == 3) { \ 263 sm_printf("parse error: "); \ 264 sm_nr_errors++; \ 265 } \ 266 sm_printf(msg); \ 267 sm_printf("\n"); \ 268 } while (0) 269 270 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0) 271 272 #define local_debug(msg...) \ 273 do { \ 274 if (local_debug) \ 275 sm_msg(msg); \ 276 } while (0) 277 278 extern char *implied_debug_msg; 279 static inline void print_implied_debug_msg(void) 280 { 281 static struct symbol *last_printed = NULL; 282 283 if (!implied_debug_msg) 284 return; 285 if (last_printed == cur_func_sym) 286 return; 287 last_printed = cur_func_sym; 288 sm_msg("%s", implied_debug_msg); 289 } 290 291 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0) 292 293 #define sm_info(msg...) do { \ 294 if (option_debug || (option_info && final_pass)) { \ 295 sm_prefix(); \ 296 sm_printf("info: "); \ 297 sm_printf(msg); \ 298 sm_printf("\n"); \ 299 } \ 300 } while(0) 301 302 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0) 303 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0) 304 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0) 305 306 static inline void sm_fatal(const char *fmt, ...) 307 { 308 va_list args; 309 310 va_start(args, fmt); 311 vfprintf(sm_outfd, fmt, args); 312 va_end(args); 313 314 fprintf(sm_outfd, "\n"); 315 316 exit(1); 317 } 318 319 static inline void sm_ierror(const char *fmt, ...) 320 { 321 va_list args; 322 323 sm_nr_errors++; 324 325 fprintf(sm_outfd, "internal error: "); 326 327 va_start(args, fmt); 328 vfprintf(sm_outfd, fmt, args); 329 va_end(args); 330 331 fprintf(sm_outfd, "\n"); 332 } 333 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1)) 334 335 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym); 336 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym); 337 struct smatch_state *get_state_expr(int owner, struct expression *expr); 338 struct state_list *get_possible_states(int owner, const char *name, 339 struct symbol *sym); 340 struct state_list *get_possible_states_expr(int owner, struct expression *expr); 341 struct sm_state *set_state(int owner, const char *name, struct symbol *sym, 342 struct smatch_state *state); 343 struct sm_state *set_state_expr(int owner, struct expression *expr, 344 struct smatch_state *state); 345 void delete_state(int owner, const char *name, struct symbol *sym); 346 void delete_state_expr(int owner, struct expression *expr); 347 void __delete_all_states_sym(struct symbol *sym); 348 void set_true_false_states(int owner, const char *name, struct symbol *sym, 349 struct smatch_state *true_state, 350 struct smatch_state *false_state); 351 void set_true_false_states_expr(int owner, struct expression *expr, 352 struct smatch_state *true_state, 353 struct smatch_state *false_state); 354 355 struct stree *get_all_states_from_stree(int owner, struct stree *source); 356 struct stree *get_all_states_stree(int id); 357 struct stree *__get_cur_stree(void); 358 int is_reachable(void); 359 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym)); 360 361 /* smatch_helper.c */ 362 DECLARE_PTR_LIST(int_stack, int); 363 char *alloc_string(const char *str); 364 void free_string(char *str); 365 void append(char *dest, const char *data, int buff_len); 366 void remove_parens(char *str); 367 struct smatch_state *alloc_state_num(int num); 368 struct smatch_state *alloc_state_str(const char *name); 369 struct smatch_state *alloc_state_expr(struct expression *expr); 370 struct expression *get_argument_from_call_expr(struct expression_list *args, 371 int num); 372 373 char *expr_to_var(struct expression *expr); 374 struct symbol *expr_to_sym(struct expression *expr); 375 char *expr_to_str(struct expression *expr); 376 char *expr_to_str_sym(struct expression *expr, 377 struct symbol **sym_ptr); 378 char *expr_to_var_sym(struct expression *expr, 379 struct symbol **sym_ptr); 380 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym); 381 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl); 382 int get_complication_score(struct expression *expr); 383 384 int sym_name_is(const char *name, struct expression *expr); 385 int get_const_value(struct expression *expr, sval_t *sval); 386 int get_value(struct expression *expr, sval_t *val); 387 int get_implied_value(struct expression *expr, sval_t *val); 388 int get_implied_min(struct expression *expr, sval_t *sval); 389 int get_implied_max(struct expression *expr, sval_t *val); 390 int get_hard_max(struct expression *expr, sval_t *sval); 391 int get_fuzzy_min(struct expression *expr, sval_t *min); 392 int get_fuzzy_max(struct expression *expr, sval_t *max); 393 int get_absolute_min(struct expression *expr, sval_t *sval); 394 int get_absolute_max(struct expression *expr, sval_t *sval); 395 int parse_call_math(struct expression *expr, char *math, sval_t *val); 396 int parse_call_math_rl(struct expression *call, char *math, struct range_list **rl); 397 char *get_value_in_terms_of_parameter_math(struct expression *expr); 398 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym); 399 int is_zero(struct expression *expr); 400 int known_condition_true(struct expression *expr); 401 int known_condition_false(struct expression *expr); 402 int implied_condition_true(struct expression *expr); 403 int implied_condition_false(struct expression *expr); 404 int can_integer_overflow(struct symbol *type, struct expression *expr); 405 void clear_math_cache(void); 406 407 int is_array(struct expression *expr); 408 struct expression *get_array_base(struct expression *expr); 409 struct expression *get_array_offset(struct expression *expr); 410 const char *show_state(struct smatch_state *state); 411 struct statement *get_expression_statement(struct expression *expr); 412 struct expression *strip_parens(struct expression *expr); 413 struct expression *strip_expr(struct expression *expr); 414 struct expression *strip_expr_set_parent(struct expression *expr); 415 void scoped_state(int my_id, const char *name, struct symbol *sym); 416 int is_error_return(struct expression *expr); 417 int getting_address(void); 418 int get_struct_and_member(struct expression *expr, const char **type, const char **member); 419 char *get_member_name(struct expression *expr); 420 char *get_fnptr_name(struct expression *expr); 421 int cmp_pos(struct position pos1, struct position pos2); 422 int positions_eq(struct position pos1, struct position pos2); 423 struct statement *get_current_statement(void); 424 struct statement *get_prev_statement(void); 425 struct expression *get_last_expr_from_expression_stmt(struct expression *expr); 426 int get_param_num_from_sym(struct symbol *sym); 427 int get_param_num(struct expression *expr); 428 int ms_since(struct timeval *start); 429 int parent_is_gone_var_sym(const char *name, struct symbol *sym); 430 int parent_is_gone(struct expression *expr); 431 int invert_op(int op); 432 int expr_equiv(struct expression *one, struct expression *two); 433 void push_int(struct int_stack **stack, int num); 434 int pop_int(struct int_stack **stack); 435 436 /* smatch_type.c */ 437 struct symbol *get_real_base_type(struct symbol *sym); 438 int type_bytes(struct symbol *type); 439 int array_bytes(struct symbol *type); 440 struct symbol *get_pointer_type(struct expression *expr); 441 struct symbol *get_type(struct expression *expr); 442 struct symbol *get_final_type(struct expression *expr); 443 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right); 444 int type_signed(struct symbol *base_type); 445 int expr_unsigned(struct expression *expr); 446 int expr_signed(struct expression *expr); 447 int returns_unsigned(struct symbol *base_type); 448 int is_pointer(struct expression *expr); 449 int returns_pointer(struct symbol *base_type); 450 sval_t sval_type_max(struct symbol *base_type); 451 sval_t sval_type_min(struct symbol *base_type); 452 int nr_bits(struct expression *expr); 453 int is_void_pointer(struct expression *expr); 454 int is_char_pointer(struct expression *expr); 455 int is_string(struct expression *expr); 456 int is_static(struct expression *expr); 457 int is_local_variable(struct expression *expr); 458 int types_equiv(struct symbol *one, struct symbol *two); 459 int fn_static(void); 460 const char *global_static(); 461 struct symbol *cur_func_return_type(void); 462 struct symbol *get_arg_type(struct expression *fn, int arg); 463 struct symbol *get_member_type_from_key(struct expression *expr, const char *key); 464 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key); 465 int is_struct(struct expression *expr); 466 char *type_to_str(struct symbol *type); 467 468 /* smatch_ignore.c */ 469 void add_ignore(int owner, const char *name, struct symbol *sym); 470 int is_ignored(int owner, const char *name, struct symbol *sym); 471 void add_ignore_expr(int owner, struct expression *expr); 472 int is_ignored_expr(int owner, struct expression *expr); 473 474 /* smatch_var_sym */ 475 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym); 476 struct var_sym_list *expr_to_vsl(struct expression *expr); 477 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym); 478 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr); 479 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym); 480 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym); 481 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl); 482 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src); 483 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two); 484 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two); 485 void free_var_sym_list(struct var_sym_list **list); 486 void free_var_syms_and_list(struct var_sym_list **list); 487 488 /* smatch_tracker */ 489 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym); 490 void add_tracker(struct tracker_list **list, int owner, const char *name, 491 struct symbol *sym); 492 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr); 493 void del_tracker(struct tracker_list **list, int owner, const char *name, 494 struct symbol *sym); 495 int in_tracker_list(struct tracker_list *list, int owner, const char *name, 496 struct symbol *sym); 497 void free_tracker_list(struct tracker_list **list); 498 void free_trackers_and_list(struct tracker_list **list); 499 500 /* smatch_conditions */ 501 int in_condition(void); 502 503 /* smatch_flow.c */ 504 505 extern int __in_fake_assign; 506 extern int __in_fake_parameter_assign; 507 extern int __in_fake_struct_assign; 508 extern int in_fake_env; 509 void smatch (int argc, char **argv); 510 int inside_loop(void); 511 int definitely_inside_loop(void); 512 struct expression *get_switch_expr(void); 513 int in_expression_statement(void); 514 void __process_post_op_stack(void); 515 void __split_expr(struct expression *expr); 516 void __split_label_stmt(struct statement *stmt); 517 void __split_stmt(struct statement *stmt); 518 extern int __in_function_def; 519 extern int option_assume_loops; 520 extern int option_two_passes; 521 extern int option_no_db; 522 extern int option_file_output; 523 extern int option_time; 524 extern struct expression_list *big_expression_stack; 525 extern struct expression_list *big_condition_stack; 526 extern struct statement_list *big_statement_stack; 527 int is_assigned_call(struct expression *expr); 528 int inlinable(struct expression *expr); 529 extern int __inline_call; 530 extern struct expression *__inline_fn; 531 extern int __in_pre_condition; 532 extern int __bail_on_rest_of_function; 533 extern struct statement *__prev_stmt; 534 extern struct statement *__cur_stmt; 535 extern struct statement *__next_stmt; 536 void init_fake_env(void); 537 void end_fake_env(void); 538 int time_parsing_function(void); 539 540 /* smatch_struct_assignment.c */ 541 struct expression *get_faked_expression(void); 542 void __fake_struct_member_assignments(struct expression *expr); 543 544 /* smatch_project.c */ 545 int is_no_inline_function(const char *function); 546 547 /* smatch_conditions */ 548 void __split_whole_condition(struct expression *expr); 549 void __handle_logic(struct expression *expr); 550 int is_condition(struct expression *expr); 551 int __handle_condition_assigns(struct expression *expr); 552 int __handle_select_assigns(struct expression *expr); 553 int __handle_expr_statement_assigns(struct expression *expr); 554 555 /* smatch_implied.c */ 556 extern int option_debug_implied; 557 extern int option_debug_related; 558 struct range_list_stack; 559 void param_limit_implications(struct expression *expr, int param, char *key, char *value); 560 struct stree *__implied_case_stree(struct expression *switch_expr, 561 struct range_list *case_rl, 562 struct range_list_stack **remaining_cases, 563 struct stree **raw_stree); 564 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm); 565 int assume(struct expression *expr); 566 void end_assume(void); 567 int impossible_assumption(struct expression *left, int op, sval_t sval); 568 569 /* smatch_extras.c */ 570 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */ 571 extern int RETURN_ID; 572 573 struct data_range { 574 sval_t min; 575 sval_t max; 576 }; 577 578 #define MTAG_ALIAS_BIT (1ULL << 63) 579 #define MTAG_OFFSET_MASK 0xfffULL 580 581 extern long long valid_ptr_min, valid_ptr_max; 582 extern sval_t valid_ptr_min_sval, valid_ptr_max_sval; 583 extern struct range_list *valid_ptr_rl; 584 static const sval_t array_min_sval = { 585 .type = &ptr_ctype, 586 {.value = 100000}, 587 }; 588 static const sval_t array_max_sval = { 589 .type = &ptr_ctype, 590 {.value = 199999}, 591 }; 592 static const sval_t text_seg_min = { 593 .type = &ptr_ctype, 594 {.value = 100000000}, 595 }; 596 static const sval_t text_seg_max = { 597 .type = &ptr_ctype, 598 {.value = 177777777}, 599 }; 600 static const sval_t data_seg_min = { 601 .type = &ptr_ctype, 602 {.value = 200000000}, 603 }; 604 static const sval_t data_seg_max = { 605 .type = &ptr_ctype, 606 {.value = 277777777}, 607 }; 608 static const sval_t bss_seg_min = { 609 .type = &ptr_ctype, 610 {.value = 300000000}, 611 }; 612 static const sval_t bss_seg_max = { 613 .type = &ptr_ctype, 614 {.value = 377777777}, 615 }; 616 static const sval_t stack_seg_min = { 617 .type = &ptr_ctype, 618 {.value = 400000000}, 619 }; 620 static const sval_t stack_seg_max = { 621 .type = &ptr_ctype, 622 {.value = 477777777}, 623 }; 624 static const sval_t kmalloc_seg_min = { 625 .type = &ptr_ctype, 626 {.value = 500000000}, 627 }; 628 static const sval_t kmalloc_seg_max = { 629 .type = &ptr_ctype, 630 {.value = 577777777}, 631 }; 632 static const sval_t vmalloc_seg_min = { 633 .type = &ptr_ctype, 634 {.value = 600000000}, 635 }; 636 static const sval_t vmalloc_seg_max = { 637 .type = &ptr_ctype, 638 {.value = 677777777}, 639 }; 640 static const sval_t fn_ptr_min = { 641 .type = &ptr_ctype, 642 {.value = 700000000}, 643 }; 644 static const sval_t fn_ptr_max = { 645 .type = &ptr_ctype, 646 {.value = 777777777}, 647 }; 648 649 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym); 650 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym); 651 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym); 652 char *map_long_to_short_name_sym_nostack(const char *name, struct symbol *sym, struct symbol **new_sym); 653 654 #define STRLEN_MAX_RET 1010101 655 656 /* smatch_absolute.c */ 657 int get_absolute_min_helper(struct expression *expr, sval_t *sval); 658 int get_absolute_max_helper(struct expression *expr, sval_t *sval); 659 660 /* smatch_local_values.c */ 661 int get_local_rl(struct expression *expr, struct range_list **rl); 662 int get_local_max_helper(struct expression *expr, sval_t *sval); 663 int get_local_min_helper(struct expression *expr, sval_t *sval); 664 665 /* smatch_type_value.c */ 666 int get_db_type_rl(struct expression *expr, struct range_list **rl); 667 /* smatch_data_val.c */ 668 int get_mtag_rl(struct expression *expr, struct range_list **rl); 669 /* smatch_array_values.c */ 670 int get_array_rl(struct expression *expr, struct range_list **rl); 671 672 /* smatch_states.c */ 673 void __swap_cur_stree(struct stree *stree); 674 void __push_fake_cur_stree(); 675 struct stree *__pop_fake_cur_stree(); 676 void __free_fake_cur_stree(); 677 void __set_fake_cur_stree_fast(struct stree *stree); 678 void __pop_fake_cur_stree_fast(void); 679 void __merge_stree_into_cur(struct stree *stree); 680 681 int unreachable(void); 682 void __set_sm(struct sm_state *sm); 683 void __set_sm_cur_stree(struct sm_state *sm); 684 void __set_sm_fake_stree(struct sm_state *sm); 685 void __set_true_false_sm(struct sm_state *true_state, 686 struct sm_state *false_state); 687 void nullify_path(void); 688 void __match_nullify_path_hook(const char *fn, struct expression *expr, 689 void *unused); 690 void __unnullify_path(void); 691 int __path_is_null(void); 692 void save_all_states(void); 693 void restore_all_states(void); 694 void free_goto_stack(void); 695 void clear_all_states(void); 696 697 struct sm_state *get_sm_state(int owner, const char *name, 698 struct symbol *sym); 699 struct sm_state *get_sm_state_expr(int owner, struct expression *expr); 700 void __push_true_states(void); 701 void __use_false_states(void); 702 void __discard_false_states(void); 703 void __merge_false_states(void); 704 void __merge_true_states(void); 705 706 void __negate_cond_stacks(void); 707 void __use_pre_cond_states(void); 708 void __use_cond_true_states(void); 709 void __use_cond_false_states(void); 710 void __push_cond_stacks(void); 711 void __fold_in_set_states(void); 712 void __free_set_states(void); 713 struct stree *__copy_cond_true_states(void); 714 struct stree *__copy_cond_false_states(void); 715 struct stree *__pop_cond_true_stack(void); 716 struct stree *__pop_cond_false_stack(void); 717 void __and_cond_states(void); 718 void __or_cond_states(void); 719 void __save_pre_cond_states(void); 720 void __discard_pre_cond_states(void); 721 struct stree *__get_true_states(void); 722 struct stree *__get_false_states(void); 723 void __use_cond_states(void); 724 extern struct state_list *__last_base_slist; 725 726 void __push_continues(void); 727 void __discard_continues(void); 728 void __process_continues(void); 729 void __merge_continues(void); 730 731 void __push_breaks(void); 732 void __process_breaks(void); 733 int __has_breaks(void); 734 void __merge_breaks(void); 735 void __use_breaks(void); 736 737 void __save_switch_states(struct expression *switch_expr); 738 void __discard_switches(void); 739 int have_remaining_cases(void); 740 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl); 741 void __push_default(void); 742 void __set_default(void); 743 int __pop_default(void); 744 745 void __push_conditions(void); 746 void __discard_conditions(void); 747 748 void __save_gotos(const char *name, struct symbol *sym); 749 void __merge_gotos(const char *name, struct symbol *sym); 750 751 void __print_cur_stree(void); 752 753 /* smatch_hooks.c */ 754 void __pass_to_client(void *data, enum hook_type type); 755 void __pass_to_client_no_data(enum hook_type type); 756 void __pass_case_to_client(struct expression *switch_expr, 757 struct range_list *rl); 758 int __has_merge_function(int client_id); 759 struct smatch_state *__client_merge_function(int owner, 760 struct smatch_state *s1, 761 struct smatch_state *s2); 762 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm); 763 void call_pre_merge_hook(struct sm_state *sm); 764 void __push_scope_hooks(void); 765 void __call_scope_hooks(void); 766 767 /* smatch_function_hooks.c */ 768 void create_function_hook_hash(void); 769 void __match_initializer_call(struct symbol *sym); 770 771 /* smatch_db.c */ 772 enum info_type { 773 INTERNAL = 0, 774 /* 775 * Changing these numbers is a pain. Don't do it. If you ever use a 776 * number it can't be re-used right away so there may be gaps. 777 * We select these in order by type so if the order matters, then give 778 * it a number below 100-999,9000-9999 ranges. */ 779 780 PARAM_CLEARED = 101, 781 PARAM_LIMIT = 103, 782 PARAM_FILTER = 104, 783 784 PARAM_VALUE = 1001, 785 BUF_SIZE = 1002, 786 USER_DATA = 1003, 787 CAPPED_DATA = 1004, 788 RETURN_VALUE = 1005, 789 DEREFERENCE = 1006, 790 RANGE_CAP = 1007, 791 LOCK_HELD = 1008, 792 LOCK_RELEASED = 1009, 793 ABSOLUTE_LIMITS = 1010, 794 PARAM_ADD = 1012, 795 PARAM_FREED = 1013, 796 DATA_SOURCE = 1014, 797 FUZZY_MAX = 1015, 798 STR_LEN = 1016, 799 ARRAY_LEN = 1017, 800 CAPABLE = 1018, 801 NS_CAPABLE = 1019, 802 CONTAINER = 1020, 803 CASTED_CALL = 1021, 804 TYPE_LINK = 1022, 805 UNTRACKED_PARAM = 1023, 806 CULL_PATH = 1024, 807 PARAM_SET = 1025, 808 PARAM_USED = 1026, 809 BYTE_UNITS = 1027, 810 COMPARE_LIMIT = 1028, 811 PARAM_COMPARE = 1029, 812 CONSTRAINT = 1031, 813 PASSES_TYPE = 1032, 814 CONSTRAINT_REQUIRED = 1033, 815 NOSPEC = 1035, 816 NOSPEC_WB = 1036, 817 STMT_CNT = 1037, 818 TERMINATED = 1038, 819 820 /* put random temporary stuff in the 7000-7999 range for testing */ 821 USER_DATA3 = 8017, 822 USER_DATA3_SET = 9017, 823 NO_OVERFLOW = 8018, 824 NO_OVERFLOW_SIMPLE = 8019, 825 LOCKED = 8020, 826 UNLOCKED = 8021, 827 SET_FS = 8022, 828 ATOMIC_INC = 8023, 829 ATOMIC_DEC = 8024, 830 NO_SIDE_EFFECT = 8025, 831 FN_ARG_LINK = 8028, 832 DATA_VALUE = 8029, 833 ARRAYSIZE_ARG = 8033, 834 SIZEOF_ARG = 8034, 835 MEMORY_TAG = 8036, 836 MTAG_ASSIGN = 8035, 837 STRING_VALUE = 8041, 838 }; 839 840 extern struct sqlite3 *smatch_db; 841 extern struct sqlite3 *mem_db; 842 extern struct sqlite3 *cache_db; 843 844 void db_ignore_states(int id); 845 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type); 846 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm)); 847 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr)); 848 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)); 849 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value)); 850 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value)); 851 struct range_list *db_return_vals(struct expression *expr); 852 struct range_list *db_return_vals_from_str(const char *fn_name); 853 char *return_state_to_var_sym(struct expression *expr, int param, const char *key, struct symbol **sym); 854 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl); 855 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym); 856 const char *state_name_to_param_name(const char *state_name, const char *param_name); 857 const char *get_param_name_var_sym(const char *name, struct symbol *sym); 858 const char *get_param_name(struct sm_state *sm); 859 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym); 860 const char *get_mtag_name_expr(struct expression *expr); 861 char *get_data_info_name(struct expression *expr); 862 863 char *escape_newlines(const char *str); 864 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql); 865 866 #define sql_helper(db, call_back, data, sql...) \ 867 do { \ 868 char sql_txt[1024]; \ 869 \ 870 sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql); \ 871 sm_debug("debug: %s\n", sql_txt); \ 872 sql_exec(db, call_back, data, sql_txt); \ 873 } while (0) 874 875 876 #define run_sql(call_back, data, sql...) \ 877 do { \ 878 if (option_no_db) \ 879 break; \ 880 sql_helper(smatch_db, call_back, data, sql); \ 881 } while (0) 882 883 #define mem_sql(call_back, data, sql...) \ 884 sql_helper(mem_db, call_back, data, sql) 885 886 #define cache_sql(call_back, data, sql...) \ 887 sql_helper(cache_db, call_back, data, sql) 888 889 #define sql_insert_helper(table, db, ignore, late, values...) \ 890 do { \ 891 struct sqlite3 *_db = db; \ 892 \ 893 if (__inline_fn && !_db) \ 894 _db = mem_db; \ 895 if (_db) { \ 896 char buf[1024]; \ 897 char *err, *p = buf; \ 898 int rc; \ 899 \ 900 p += snprintf(p, buf + sizeof(buf) - p, \ 901 "insert %sinto %s values (", \ 902 ignore ? "or ignore " : "", #table); \ 903 p += snprintf(p, buf + sizeof(buf) - p, values); \ 904 p += snprintf(p, buf + sizeof(buf) - p, ");"); \ 905 sm_debug("mem-db: %s\n", buf); \ 906 rc = sqlite3_exec(_db, buf, NULL, NULL, &err); \ 907 if (rc != SQLITE_OK) { \ 908 sm_ierror("SQL error #2: %s", err); \ 909 sm_ierror("SQL: '%s'", buf); \ 910 parse_error = 1; \ 911 } \ 912 break; \ 913 } \ 914 if (option_info) { \ 915 FILE *tmp_fd = sm_outfd; \ 916 sm_outfd = sql_outfd; \ 917 sm_prefix(); \ 918 sm_printf("SQL%s: insert %sinto " #table " values(", \ 919 late ? "_late" : "", ignore ? "or ignore " : ""); \ 920 sm_printf(values); \ 921 sm_printf(");\n"); \ 922 sm_outfd = tmp_fd; \ 923 } \ 924 } while (0) 925 926 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, 0, values); 927 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 0, 1, 0, values); 928 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 0, 1, values); 929 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values); 930 931 char *get_static_filter(struct symbol *sym); 932 933 void sql_insert_return_states(int return_id, const char *return_ranges, 934 int type, int param, const char *key, const char *value); 935 void sql_insert_caller_info(struct expression *call, int type, int param, 936 const char *key, const char *value); 937 void sql_insert_function_ptr(const char *fn, const char *struct_name); 938 void sql_insert_return_values(const char *return_values); 939 void sql_insert_return_implies(int type, int param, const char *key, const char *value); 940 void sql_insert_function_type_size(const char *member, const char *ranges); 941 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value); 942 void sql_insert_type_info(int type, const char *member, const char *value); 943 void sql_insert_local_values(const char *name, const char *value); 944 void sql_insert_function_type_value(const char *type, const char *value); 945 void sql_insert_function_type(int param, const char *value); 946 void sql_insert_parameter_name(int param, const char *value); 947 void sql_insert_data_info(struct expression *data, int type, const char *value); 948 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value); 949 void sql_save_constraint(const char *con); 950 void sql_save_constraint_required(const char *data, int op, const char *limit); 951 void sql_copy_constraint_required(const char *new_limit, const char *old_limit); 952 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data); 953 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value); 954 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name); 955 void insert_mtag_data(sval_t sval, struct range_list *rl); 956 void sql_insert_mtag_map(mtag_t tag, int offset, mtag_t container); 957 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias); 958 int mtag_map_select_container(mtag_t tag, int offset, mtag_t *container); 959 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag); 960 961 void sql_select_return_states(const char *cols, struct expression *call, 962 int (*callback)(void*, int, char**, char**), void *info); 963 void sql_select_call_implies(const char *cols, struct expression *call, 964 int (*callback)(void*, int, char**, char**)); 965 966 void open_smatch_db(char *db_file); 967 968 /* smatch_files.c */ 969 int open_data_file(const char *filename); 970 int open_schema_file(const char *schema); 971 struct token *get_tokens_file(const char *filename); 972 973 /* smatch.c */ 974 extern char *option_debug_check; 975 extern char *option_project_str; 976 extern char *bin_dir; 977 extern char *data_dir; 978 extern int option_no_data; 979 extern int option_full_path; 980 extern int option_param_mapper; 981 extern int option_call_tree; 982 extern int num_checks; 983 984 enum project_type { 985 PROJ_NONE, 986 PROJ_KERNEL, 987 PROJ_WINE, 988 PROJ_ILLUMOS_KERNEL, 989 PROJ_ILLUMOS_USER, 990 PROJ_UNKNOWN, 991 }; 992 extern enum project_type option_project; 993 const char *check_name(unsigned short id); 994 int id_from_name(const char *name); 995 996 997 /* smatch_buf_size.c */ 998 int get_array_size(struct expression *expr); 999 int get_array_size_bytes(struct expression *expr); 1000 int get_array_size_bytes_min(struct expression *expr); 1001 int get_array_size_bytes_max(struct expression *expr); 1002 struct range_list *get_array_size_bytes_rl(struct expression *expr); 1003 int get_real_array_size(struct expression *expr); 1004 int last_member_is_resizable(struct symbol *type); 1005 /* smatch_strlen.c */ 1006 int get_implied_strlen(struct expression *expr, struct range_list **rl); 1007 int get_size_from_strlen(struct expression *expr); 1008 1009 /* smatch_capped.c */ 1010 int is_capped(struct expression *expr); 1011 int is_capped_var_sym(const char *name, struct symbol *sym); 1012 1013 /* check_user_data.c */ 1014 int is_user_macro(struct expression *expr); 1015 int is_user_data(struct expression *expr); 1016 int is_capped_user_data(struct expression *expr); 1017 int implied_user_data(struct expression *expr, struct range_list **rl); 1018 struct stree *get_user_stree(void); 1019 int get_user_rl(struct expression *expr, struct range_list **rl); 1020 int get_user_rl_spammy(struct expression *expr, struct range_list **rl); 1021 int is_user_rl(struct expression *expr); 1022 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl); 1023 1024 /* check_locking.c */ 1025 void print_held_locks(); 1026 1027 /* check_assigned_expr.c */ 1028 struct expression *get_assigned_expr(struct expression *expr); 1029 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym); 1030 /* smatch_return_to_param.c */ 1031 void __add_return_to_param_mapping(struct expression *assign, const char *return_string); 1032 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym); 1033 1034 /* smatch_comparison.c */ 1035 struct compare_data { 1036 /* The ->left and ->right expression pointers might be NULL (I'm lazy) */ 1037 struct expression *left; 1038 const char *left_var; 1039 struct var_sym_list *left_vsl; 1040 int comparison; 1041 struct expression *right; 1042 const char *right_var; 1043 struct var_sym_list *right_vsl; 1044 }; 1045 DECLARE_ALLOCATOR(compare_data); 1046 struct smatch_state *alloc_compare_state( 1047 struct expression *left, 1048 const char *left_var, struct var_sym_list *left_vsl, 1049 int comparison, 1050 struct expression *right, 1051 const char *right_var, struct var_sym_list *right_vsl); 1052 int filter_comparison(int orig, int op); 1053 int merge_comparisons(int one, int two); 1054 int combine_comparisons(int left_compare, int right_compare); 1055 int state_to_comparison(struct smatch_state *state); 1056 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2); 1057 int get_comparison(struct expression *left, struct expression *right); 1058 int get_comparison_strings(const char *one, const char *two); 1059 int possible_comparison(struct expression *a, int comparison, struct expression *b); 1060 struct state_list *get_all_comparisons(struct expression *expr); 1061 struct state_list *get_all_possible_equal_comparisons(struct expression *expr); 1062 void __add_return_comparison(struct expression *call, const char *range); 1063 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range); 1064 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym); 1065 char *name_sym_to_param_comparison(const char *name, struct symbol *sym); 1066 char *expr_equal_to_param(struct expression *expr, int ignore); 1067 char *expr_lte_to_param(struct expression *expr, int ignore); 1068 char *expr_param_comparison(struct expression *expr, int ignore); 1069 int flip_comparison(int op); 1070 int negate_comparison(int op); 1071 int remove_unsigned_from_comparison(int op); 1072 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value); 1073 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right); 1074 struct sm_state *comparison_implication_hook(struct expression *expr, 1075 struct state_list **true_stack, 1076 struct state_list **false_stack); 1077 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr, 1078 const char *state_name, 1079 struct smatch_state *true_state, struct smatch_state *false_state); 1080 int impossibly_high_comparison(struct expression *expr); 1081 1082 /* smatch_sval.c */ 1083 sval_t *sval_alloc(sval_t sval); 1084 sval_t *sval_alloc_permanent(sval_t sval); 1085 sval_t sval_blank(struct expression *expr); 1086 sval_t sval_type_val(struct symbol *type, long long val); 1087 sval_t sval_from_val(struct expression *expr, long long val); 1088 int sval_is_ptr(sval_t sval); 1089 int sval_unsigned(sval_t sval); 1090 int sval_signed(sval_t sval); 1091 int sval_bits(sval_t sval); 1092 int sval_bits_used(sval_t sval); 1093 int sval_is_negative(sval_t sval); 1094 int sval_is_positive(sval_t sval); 1095 int sval_is_min(sval_t sval); 1096 int sval_is_max(sval_t sval); 1097 int sval_is_a_min(sval_t sval); 1098 int sval_is_a_max(sval_t sval); 1099 int sval_is_negative_min(sval_t sval); 1100 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two); 1101 int sval_cmp_val(sval_t one, long long val); 1102 sval_t sval_min(sval_t one, sval_t two); 1103 sval_t sval_max(sval_t one, sval_t two); 1104 int sval_too_low(struct symbol *type, sval_t sval); 1105 int sval_too_high(struct symbol *type, sval_t sval); 1106 int sval_fits(struct symbol *type, sval_t sval); 1107 sval_t sval_cast(struct symbol *type, sval_t sval); 1108 sval_t sval_preop(sval_t sval, int op); 1109 sval_t sval_binop(sval_t left, int op, sval_t right); 1110 int sval_binop_overflows(sval_t left, int op, sval_t right); 1111 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right); 1112 unsigned long long fls_mask(unsigned long long uvalue); 1113 unsigned long long sval_fls_mask(sval_t sval); 1114 const char *sval_to_str(sval_t sval); 1115 const char *sval_to_numstr(sval_t sval); 1116 sval_t ll_to_sval(long long val); 1117 1118 /* smatch_string_list.c */ 1119 int list_has_string(struct string_list *str_list, const char *str); 1120 void insert_string(struct string_list **str_list, const char *str); 1121 struct string_list *clone_str_list(struct string_list *orig); 1122 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two); 1123 1124 /* smatch_start_states.c */ 1125 struct stree *get_start_states(void); 1126 1127 /* smatch_recurse.c */ 1128 int has_symbol(struct expression *expr, struct symbol *sym); 1129 int has_variable(struct expression *expr, struct expression *var); 1130 int has_inc_dec(struct expression *expr); 1131 1132 /* smatch_stored_conditions.c */ 1133 struct smatch_state *get_stored_condition(struct expression *expr); 1134 struct expression_list *get_conditions(struct expression *expr); 1135 struct sm_state *stored_condition_implication_hook(struct expression *expr, 1136 struct state_list **true_stack, 1137 struct state_list **false_stack); 1138 1139 /* check_string_len.c */ 1140 int get_formatted_string_size(struct expression *call, int arg); 1141 1142 /* smatch_param_set.c */ 1143 int param_was_set(struct expression *expr); 1144 int param_was_set_var_sym(const char *name, struct symbol *sym); 1145 /* smatch_param_filter.c */ 1146 int param_has_filter_data(struct sm_state *sm); 1147 1148 /* smatch_links.c */ 1149 void set_up_link_functions(int id, int linkid); 1150 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2); 1151 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym); 1152 1153 /* smatch_auto_copy.c */ 1154 void set_auto_copy(int owner); 1155 1156 /* check_buf_comparison */ 1157 struct expression *get_size_variable(struct expression *buf); 1158 struct expression *get_array_variable(struct expression *size); 1159 1160 /* smatch_untracked_param.c */ 1161 void mark_untracked(struct expression *expr, int param, const char *key, const char *value); 1162 void add_untracked_param_hook(void (func)(struct expression *call, int param)); 1163 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr); 1164 1165 /* smatch_strings.c */ 1166 struct state_list *get_strings(struct expression *expr); 1167 struct expression *fake_string_from_mtag(mtag_t tag); 1168 1169 /* smatch_estate.c */ 1170 int estate_get_single_value(struct smatch_state *state, sval_t *sval); 1171 1172 /* smatch_address.c */ 1173 int get_address_rl(struct expression *expr, struct range_list **rl); 1174 int get_member_offset(struct symbol *type, const char *member_name); 1175 int get_member_offset_from_deref(struct expression *expr); 1176 1177 /* for now this is in smatch_used_parameter.c */ 1178 void __get_state_hook(int owner, const char *name, struct symbol *sym); 1179 1180 /* smatch_buf_comparison.c */ 1181 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl); 1182 1183 struct stree *get_all_return_states(void); 1184 struct stree_stack *get_all_return_strees(void); 1185 int on_atomic_dec_path(void); 1186 int was_inced(const char *name, struct symbol *sym); 1187 1188 /* smatch_constraints.c */ 1189 char *get_constraint_str(struct expression *expr); 1190 struct constraint_list *get_constraints(struct expression *expr); 1191 char *unmet_constraint(struct expression *data, struct expression *offset); 1192 char *get_required_constraint(const char *data_str); 1193 1194 /* smatch_container_of.c */ 1195 int get_param_from_container_of(struct expression *expr); 1196 int get_offset_from_container_of(struct expression *expr); 1197 1198 /* smatch_mtag.c */ 1199 int get_string_mtag(struct expression *expr, mtag_t *tag); 1200 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag); 1201 int get_mtag(struct expression *expr, mtag_t *tag); 1202 int get_mtag_offset(struct expression *expr, mtag_t *tag, int *offset); 1203 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new); 1204 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset); 1205 void update_mtag_data(struct expression *expr); 1206 int get_mtag_sval(struct expression *expr, sval_t *sval); 1207 int get_mtag_addr_sval(struct expression *expr, sval_t *sval); 1208 1209 /* Trinity fuzzer stuff */ 1210 const char *get_syscall_arg_type(struct symbol *sym); 1211 1212 /* smatch_mem_tracker.c */ 1213 extern int option_mem; 1214 unsigned long get_max_memory(void); 1215 1216 /* check_is_nospec.c */ 1217 bool is_nospec(struct expression *expr); 1218 1219 /* smatch_nul_terminator.c */ 1220 bool is_nul_terminated(struct expression *expr); 1221 1222 static inline int type_bits(struct symbol *type) 1223 { 1224 if (!type) 1225 return 0; 1226 if (type->type == SYM_PTR) /* Sparse doesn't set this for &pointers */ 1227 return bits_in_pointer; 1228 if (type->type == SYM_ARRAY) 1229 return bits_in_pointer; 1230 if (!type->examined) 1231 examine_symbol_type(type); 1232 return type->bit_size; 1233 } 1234 1235 static inline bool type_is_ptr(struct symbol *type) 1236 { 1237 return type && (type->type == SYM_PTR || type->type == SYM_ARRAY); 1238 } 1239 1240 static inline int type_unsigned(struct symbol *base_type) 1241 { 1242 if (!base_type) 1243 return 0; 1244 if (base_type->ctype.modifiers & MOD_UNSIGNED) 1245 return 1; 1246 return 0; 1247 } 1248 1249 static inline int type_positive_bits(struct symbol *type) 1250 { 1251 if (!type) 1252 return 0; 1253 if (type->type == SYM_ARRAY) 1254 return bits_in_pointer - 1; 1255 if (type_unsigned(type)) 1256 return type_bits(type); 1257 return type_bits(type) - 1; 1258 } 1259 1260 static inline int sval_positive_bits(sval_t sval) 1261 { 1262 return type_positive_bits(sval.type); 1263 } 1264 1265 /* 1266 * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger. 1267 */ 1268 static inline int sval_cmp(sval_t one, sval_t two) 1269 { 1270 struct symbol *type; 1271 1272 type = one.type; 1273 if (sval_positive_bits(two) > sval_positive_bits(one)) 1274 type = two.type; 1275 if (type_bits(type) < 31) 1276 type = &int_ctype; 1277 1278 one = sval_cast(type, one); 1279 two = sval_cast(type, two); 1280 1281 if (type_unsigned(type)) { 1282 if (one.uvalue < two.uvalue) 1283 return -1; 1284 if (one.uvalue == two.uvalue) 1285 return 0; 1286 return 1; 1287 } 1288 /* fix me handle type promotion and unsigned values */ 1289 if (one.value < two.value) 1290 return -1; 1291 if (one.value == two.value) 1292 return 0; 1293 return 1; 1294 } 1295 1296 #endif /* !SMATCH_H_ */