smatch.h

   1 /*
   2  * sparse/smatch.h
   3  *
   4  * Copyright (C) 2006 Dan Carpenter.
   5  *
   6  *  Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #ifndef         SMATCH_H_
  11 # define        SMATCH_H_
  12
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <limits.h>
  16 #include <sys/time.h>
  17 #include "lib.h"
  18 #include "allocate.h"
  19 #include "parse.h"
  20 #include "expression.h"
  21
  22 typedef struct {
  23         struct symbol *type;
  24         union {
  25                 long long value;
  26                 unsigned long long uvalue;
  27         };
  28 } sval_t;
  29
  30 struct smatch_state {
  31         const char *name;
  32         void *data;
  33 };
  34 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
  35 extern struct smatch_state undefined;
  36 extern struct smatch_state merged;
  37 extern struct smatch_state true_state;
  38 extern struct smatch_state false_state;
  39 DECLARE_ALLOCATOR(smatch_state);
  40
  41 static inline void *INT_PTR(int i)
  42 {
  43         return (void *)(long)i;
  44 }
  45
  46 static inline int PTR_INT(void *p)
  47 {
  48         return (int)(long)p;
  49 }
  50
  51 struct sm_state {
  52         unsigned short owner;
  53         unsigned int merged:1;
  54         unsigned int implied:1;
  55         const char *name;
  56         struct symbol *sym;
  57         struct smatch_state *state;
  58         unsigned int line;
  59         struct state_list *pool;
  60         struct sm_state *left;
  61         struct sm_state *right;
  62         unsigned int nr_children;
  63         struct state_list *possible;
  64 };
  65
  66 struct var_sym {
  67         char *var;
  68         struct symbol *sym;
  69 };
  70 DECLARE_ALLOCATOR(var_sym);
  71 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  72
  73 struct tracker {
  74         int owner;
  75         char *name;
  76         struct symbol *sym;
  77 };
  78 DECLARE_ALLOCATOR(tracker);
  79 DECLARE_PTR_LIST(tracker_list, struct tracker);
  80
  81 enum hook_type {
  82         EXPR_HOOK,
  83         STMT_HOOK,
  84         SYM_HOOK,
  85         STRING_HOOK,
  86         DECLARATION_HOOK,
  87         ASSIGNMENT_HOOK,
  88         RAW_ASSIGNMENT_HOOK,
  89         GLOBAL_ASSIGNMENT_HOOK,
  90         LOGIC_HOOK,
  91         CONDITION_HOOK,
  92         PRELOOP_HOOK,
  93         SELECT_HOOK,
  94         WHOLE_CONDITION_HOOK,
  95         FUNCTION_CALL_HOOK,
  96         CALL_HOOK_AFTER_INLINE,
  97         CALL_ASSIGNMENT_HOOK,
  98         MACRO_ASSIGNMENT_HOOK,
  99         BINOP_HOOK,
 100         OP_HOOK,
 101         DEREF_HOOK,
 102         CASE_HOOK,
 103         ASM_HOOK,
 104         CAST_HOOK,
 105         SIZEOF_HOOK,
 106         BASE_HOOK,
 107         FUNC_DEF_HOOK,
 108         AFTER_DEF_HOOK,
 109         END_FUNC_HOOK,
 110         AFTER_FUNC_HOOK,
 111         RETURN_HOOK,
 112         INLINE_FN_START,
 113         INLINE_FN_END,
 114         END_FILE_HOOK,
 115 };
 116
 117 #define TRUE 1
 118 #define FALSE 0
 119
 120 struct range_list;
 121
 122 void add_hook(void *func, enum hook_type type);
 123 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 124 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 125 void add_merge_hook(int client_id, merge_func_t *func);
 126 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 127 typedef void (scope_hook)(void *data);
 128 void add_scope_hook(scope_hook *hook, void *data);
 129 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 130 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 131                                 struct expression *assign_expr, void *data);
 132 typedef void (return_implies_hook)(struct expression *call_expr,
 133                                    int param, char *key, char *value);
 134 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 135 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 136
 137 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 138                               void *info);
 139 void add_implied_return_hook(const char *look_for,
 140                              implied_return_hook *call_back,
 141                              void *info);
 142 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 143                               void *info);
 144 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 145                               void *info);
 146 void return_implies_state(const char *look_for, long long start, long long end,
 147                          implication_hook *call_back, void *info);
 148 void select_return_states_hook(int type, return_implies_hook *callback);
 149 void select_return_states_before(void (*fn)(void));
 150 void select_return_states_after(void (*fn)(void));
 151 int get_implied_return(struct expression *expr, struct range_list **rl);
 152
 153 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 154 void add_modification_hook(int owner, modification_hook *call_back);
 155 void add_indirect_modification_hook(int owner, modification_hook *call_back);
 156
 157 int outside_of_function(void);
 158 const char *get_filename(void);
 159 const char *get_base_file(void);
 160 char *get_function(void);
 161 int get_lineno(void);
 162 extern int final_pass;
 163 extern struct symbol *cur_func_sym;
 164 extern int option_debug;
 165 extern int local_debug;
 166
 167 extern FILE *sm_outfd;
 168 #define sm_printf(msg...) do { if (final_pass || option_debug) fprintf(sm_outfd, msg); } while (0)
 169
 170 static inline void sm_prefix(void)
 171 {
 172         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 173 }
 174
 175 static inline void print_implied_debug_msg();
 176
 177 #define sm_msg(msg...) \
 178 do {                                                           \
 179         print_implied_debug_msg();                             \
 180         if (!option_debug && !final_pass)                      \
 181                 break;                                         \
 182         sm_prefix();                                           \
 183         sm_printf(msg);                                        \
 184         sm_printf("\n");                                       \
 185 } while (0)
 186
 187 #define local_debug(msg...)                                     \
 188 do {                                                            \
 189         if (local_debug)                                        \
 190                 sm_msg(msg);                                    \
 191 } while (0)
 192
 193 extern char *implied_debug_msg;
 194 static inline void print_implied_debug_msg()
 195 {
 196         static struct symbol *last_printed = NULL;
 197
 198         if (!implied_debug_msg)
 199                 return;
 200         if (last_printed == cur_func_sym)
 201                 return;
 202         last_printed = cur_func_sym;
 203         sm_msg("%s", implied_debug_msg);
 204 }
 205
 206 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 207
 208 #define sm_info(msg...) do {                                    \
 209         if (option_debug || (option_info && final_pass)) {      \
 210                 sm_prefix();                                    \
 211                 sm_printf("info: ");                            \
 212                 sm_printf(msg);                                 \
 213                 sm_printf("\n");                                \
 214         }                                                       \
 215 } while(0)
 216
 217 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 218 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 219 struct state_list *get_possible_states(int owner, const char *name,
 220                                        struct symbol *sym);
 221 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 222 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 223                struct smatch_state *state);
 224 struct sm_state *set_state_expr(int owner, struct expression *expr,
 225                 struct smatch_state *state);
 226 void delete_state(int owner, const char *name, struct symbol *sym);
 227 void delete_state_expr(int owner, struct expression *expr);
 228 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 229                            struct smatch_state *true_state,
 230                            struct smatch_state *false_state);
 231 void set_true_false_states_expr(int owner, struct expression *expr,
 232                            struct smatch_state *true_state,
 233                            struct smatch_state *false_state);
 234
 235 struct state_list *get_all_states_slist(int owner, struct state_list *source);
 236 struct state_list *get_all_states(int id);
 237 int is_reachable(void);
 238
 239 /* smatch_helper.c */
 240 char *alloc_string(const char *str);
 241 void free_string(char *str);
 242 void append(char *dest, const char *data, int buff_len);
 243 void remove_parens(char *str);
 244 struct smatch_state *alloc_state_num(int num);
 245 struct expression *get_argument_from_call_expr(struct expression_list *args,
 246                                                int num);
 247
 248 char *expr_to_var(struct expression *expr);
 249 char *expr_to_str(struct expression *expr);
 250 char *expr_to_str_sym(struct expression *expr,
 251                                      struct symbol **sym_ptr);
 252 char *expr_to_var_sym(struct expression *expr,
 253                              struct symbol **sym_ptr);
 254
 255 int sym_name_is(const char *name, struct expression *expr);
 256 int get_const_value(struct expression *expr, sval_t *sval);
 257 int get_value(struct expression *expr, sval_t *val);
 258 int get_implied_value(struct expression *expr, sval_t *val);
 259 int get_implied_min(struct expression *expr, sval_t *sval);
 260 int get_implied_max(struct expression *expr, sval_t *val);
 261 int get_hard_max(struct expression *expr, sval_t *sval);
 262 int get_fuzzy_min(struct expression *expr, sval_t *min);
 263 int get_fuzzy_max(struct expression *expr, sval_t *max);
 264 int get_absolute_min(struct expression *expr, sval_t *sval);
 265 int get_absolute_max(struct expression *expr, sval_t *sval);
 266 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 267 int is_zero(struct expression *expr);
 268 int known_condition_true(struct expression *expr);
 269 int known_condition_false(struct expression *expr);
 270 int implied_condition_true(struct expression *expr);
 271 int implied_condition_false(struct expression *expr);
 272
 273 int is_array(struct expression *expr);
 274 struct expression *get_array_name(struct expression *expr);
 275 struct expression *get_array_offset(struct expression *expr);
 276 const char *show_state(struct smatch_state *state);
 277 struct statement *get_expression_statement(struct expression *expr);
 278 struct expression *strip_parens(struct expression *expr);
 279 struct expression *strip_expr(struct expression *expr);
 280 void scoped_state(int my_id, const char *name, struct symbol *sym);
 281 int is_error_return(struct expression *expr);
 282 int getting_address(void);
 283 char *get_member_name(struct expression *expr);
 284 char *get_fnptr_name(struct expression *expr);
 285 int positions_eq(struct position pos1, struct position pos2);
 286 struct statement *get_current_statement(void);
 287 int get_param_num_from_sym(struct symbol *sym);
 288 int ms_since(struct timeval *start);
 289
 290 /* smatch_type.c */
 291 struct symbol *get_real_base_type(struct symbol *sym);
 292 int type_bits(struct symbol *type);
 293 int type_positive_bits(struct symbol *type);
 294 struct symbol *get_pointer_type(struct expression *expr);
 295 struct symbol *get_type(struct expression *expr);
 296 int type_unsigned(struct symbol *base_type);
 297 int type_signed(struct symbol *base_type);
 298 int expr_unsigned(struct expression *expr);
 299 int returns_unsigned(struct symbol *base_type);
 300 int is_pointer(struct expression *expr);
 301 int returns_pointer(struct symbol *base_type);
 302 sval_t sval_type_max(struct symbol *base_type);
 303 sval_t sval_type_min(struct symbol *base_type);
 304 int nr_bits(struct expression *expr);
 305 int is_void_pointer(struct expression *expr);
 306 int is_char_pointer(struct expression *expr);
 307 int is_static(struct expression *expr);
 308 int types_equiv(struct symbol *one, struct symbol *two);
 309 int fn_static(void);
 310 const char *global_static();
 311 struct symbol *cur_func_return_type(void);
 312 struct symbol *get_arg_type(struct expression *fn, int arg);
 313 struct symbol *get_member_type_from_key(struct expression *expr, char *key);
 314
 315 /* smatch_ignore.c */
 316 void add_ignore(int owner, const char *name, struct symbol *sym);
 317 int is_ignored(int owner, const char *name, struct symbol *sym);
 318
 319 /* smatch_var_sym */
 320 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 321 struct var_sym_list *expr_to_vsl(struct expression *expr);
 322 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 323 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 324 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 325 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 326 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 327 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 328 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 329 void free_var_sym_list(struct var_sym_list **list);
 330 void free_var_syms_and_list(struct var_sym_list **list);
 331
 332 /* smatch_tracker */
 333 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 334 void add_tracker(struct tracker_list **list, int owner, const char *name,
 335                 struct symbol *sym);
 336 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 337 void del_tracker(struct tracker_list **list, int owner, const char *name,
 338                 struct symbol *sym);
 339 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 340                 struct symbol *sym);
 341 void free_tracker_list(struct tracker_list **list);
 342 void free_trackers_and_list(struct tracker_list **list);
 343
 344 /* smatch_conditions */
 345 int in_condition(void);
 346
 347 /* smatch_flow.c */
 348
 349 void smatch (int argc, char **argv);
 350 int inside_loop(void);
 351 struct expression *get_switch_expr(void);
 352 int in_expression_statement(void);
 353 void __process_post_op_stack(void);
 354 void __split_expr(struct expression *expr);
 355 void __split_stmt(struct statement *stmt);
 356 extern int option_assume_loops;
 357 extern int option_known_conditions;
 358 extern int option_two_passes;
 359 extern int option_no_db;
 360 extern int option_file_output;
 361 extern int option_time;
 362 extern struct expression_list *big_expression_stack;
 363 extern struct statement_list *big_statement_stack;
 364 int inlinable(struct expression *expr);
 365 extern int __inline_call;
 366 extern struct expression *__inline_fn;
 367 extern int __in_pre_condition;
 368 extern int __bail_on_rest_of_function;
 369
 370 /* smatch_conditions */
 371 void __split_whole_condition(struct expression *expr);
 372 void __handle_logic(struct expression *expr);
 373 int is_condition(struct expression *expr);
 374 int __handle_condition_assigns(struct expression *expr);
 375 int __handle_select_assigns(struct expression *expr);
 376 int __handle_expr_statement_assigns(struct expression *expr);
 377
 378 /* smatch_implied.c */
 379 extern int option_debug_implied;
 380 extern int option_debug_related;
 381 extern int option_no_implied;
 382 struct range_list_stack;
 383 struct state_list *__implied_case_slist(struct expression *switch_expr,
 384                                         struct expression *case_expr,
 385                                         struct range_list_stack **remaining_cases,
 386                                         struct state_list **raw_slist);
 387 struct range_list *__get_implied_values(struct expression *switch_expr);
 388 void overwrite_states_using_pool(struct sm_state *sm);
 389
 390 /* smatch_extras.c */
 391 #define SMATCH_EXTRA 1 /* this is my_id from smatch extra set in smatch.c */
 392
 393 struct data_range {
 394         sval_t min;
 395         sval_t max;
 396 };
 397
 398 static const long long valid_ptr_max = LONG_MAX;
 399 static const long long valid_ptr_min = 4096;
 400 static const sval_t valid_ptr_max_sval = {
 401         .type = &ptr_ctype,
 402         {.value = LONG_MAX},
 403 };
 404 static const sval_t valid_ptr_min_sval = {
 405         .type = &ptr_ctype,
 406         {.value = 4096},
 407 };
 408
 409 /* smatch_absolute.c */
 410 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 411 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 412
 413 /* smatch_local_values.c */
 414 int get_local_rl(struct expression *expr, struct range_list **rl);
 415 int get_local_max_helper(struct expression *expr, sval_t *sval);
 416 int get_local_min_helper(struct expression *expr, sval_t *sval);
 417
 418 /* smatch_states.c */
 419 void __push_fake_cur_slist();
 420 struct state_list *__pop_fake_cur_slist();
 421 void __free_fake_cur_slist();
 422 void __set_fake_cur_slist_fast(struct state_list *slist);
 423 void __pop_fake_cur_slist_fast(void);
 424 void __merge_slist_into_cur(struct state_list *slist);
 425
 426 int unreachable(void);
 427 void __set_sm(struct sm_state *sm);
 428 struct state_list *__get_cur_slist(void);
 429 void __set_true_false_sm(struct sm_state *true_state,
 430                         struct sm_state *false_state);
 431 void nullify_path(void);
 432 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 433                                void *unused);
 434 void __unnullify_path(void);
 435 int __path_is_null(void);
 436 void save_all_states(void);
 437 void nullify_all_states(void);
 438 void restore_all_states(void);
 439 void clear_all_states(void);
 440
 441 struct sm_state *get_sm_state(int owner, const char *name,
 442                                 struct symbol *sym);
 443 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 444 void __push_true_states(void);
 445 void __use_false_states(void);
 446 void __discard_false_states(void);
 447 void __merge_false_states(void);
 448 void __merge_true_states(void);
 449
 450 void __negate_cond_stacks(void);
 451 void __use_pre_cond_states(void);
 452 void __use_cond_true_states(void);
 453 void __use_cond_false_states(void);
 454 void __push_cond_stacks(void);
 455 struct state_list *__copy_cond_true_states(void);
 456 struct state_list *__copy_cond_false_states(void);
 457 struct state_list *__pop_cond_true_stack(void);
 458 struct state_list *__pop_cond_false_stack(void);
 459 void __and_cond_states(void);
 460 void __or_cond_states(void);
 461 void __save_pre_cond_states(void);
 462 void __discard_pre_cond_states(void);
 463 void __use_cond_states(void);
 464 extern struct state_list *__last_base_slist;
 465
 466 void __warn_on_silly_pre_loops(void);
 467
 468 void __push_continues(void);
 469 void __discard_continues(void);
 470 void __process_continues(void);
 471 void __merge_continues(void);
 472
 473 void __push_breaks(void);
 474 void __process_breaks(void);
 475 int __has_breaks(void);
 476 void __merge_breaks(void);
 477 void __use_breaks(void);
 478
 479 void __save_switch_states(struct expression *switch_expr);
 480 void __discard_switches(void);
 481 void __merge_switches(struct expression *switch_expr, struct expression *case_expr);
 482 void __push_default(void);
 483 void __set_default(void);
 484 int __pop_default(void);
 485
 486 void __push_conditions(void);
 487 void __discard_conditions(void);
 488
 489 void __save_gotos(const char *name);
 490 void __merge_gotos(const char *name);
 491
 492 void __print_cur_slist(void);
 493
 494 /* smatch_hooks.c */
 495 void __pass_to_client(void *data, enum hook_type type);
 496 void __pass_to_client_no_data(enum hook_type type);
 497 void __pass_case_to_client(struct expression *switch_expr,
 498                            struct expression *case_expr);
 499 int __has_merge_function(int client_id);
 500 struct smatch_state *__client_merge_function(int owner,
 501                                              struct smatch_state *s1,
 502                                              struct smatch_state *s2);
 503 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 504 void __push_scope_hooks(void);
 505 void __call_scope_hooks(void);
 506
 507 /* smatch_function_hooks.c */
 508 void create_function_hook_hash(void);
 509 void __match_initializer_call(struct symbol *sym);
 510
 511 /* smatch_db.c */
 512 enum info_type {
 513         INTERNAL        = 0,
 514         PARAM_VALUE     = 1,
 515         BUF_SIZE        = 2,
 516         USER_DATA       = 3,
 517         CAPPED_DATA     = 4,
 518         RETURN_VALUE    = 5,
 519         DEREFERENCE     = 6,
 520         RANGE_CAP       = 7,
 521         LOCK_HELD       = 8,
 522         LOCK_RELEASED   = 9,
 523         ABSOLUTE_LIMITS = 10,
 524         LIMITED_VALUE   = 11,
 525         ADDED_VALUE     = 12,
 526         FILTER_VALUE    = 13,
 527         PARAM_CLEARED   = 14,
 528 };
 529
 530 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 531 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct smatch_state *state));
 532 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 533 void add_returned_member_callback(int owner, void (*callback)(int return_id, char *return_ranges, char *printed_name, struct smatch_state *state));
 534 void select_call_implies_hook(int type, void (*callback)(struct expression *arg, char *value));
 535 struct range_list *db_return_vals(struct expression *expr);
 536 char *return_state_to_var_sym(struct expression *expr, int param, char *key, struct symbol **sym);
 537 char *get_variable_from_key(struct expression *arg, char *key, struct symbol **sym);
 538 const char *get_param_name(struct sm_state *sm);
 539
 540 #define run_sql(call_back, sql...)    \
 541 do {                                  \
 542         char sql_txt[1024];           \
 543         if (option_no_db)             \
 544                 break;                \
 545         snprintf(sql_txt, 1024, sql); \
 546         sm_debug("%s\n", sql_txt);    \
 547         sql_exec(call_back, sql_txt); \
 548 } while (0)
 549
 550 /* like run_sql() but for the in-memory database */
 551 #define mem_sql(call_back, sql...)                                              \
 552 do {                                                                            \
 553         char sql_txt[1024];                                                     \
 554                                                                                 \
 555         snprintf(sql_txt, sizeof(sql_txt), sql);                                \
 556         sm_debug("in-mem: %s\n", sql_txt);                                      \
 557         sql_mem_exec(call_back, sql_txt);                                       \
 558 } while (0)
 559
 560 void sql_insert_return_states(int return_id, const char *return_ranges,
 561                 int type, int param, const char *key, const char *value);
 562 void sql_insert_caller_info(struct expression *call, int type, int param,
 563                 const char *key, const char *value);
 564 void sql_insert_function_ptr(const char *fn, const char *struct_name);
 565 void sql_insert_return_values(const char *return_values);
 566 void sql_insert_call_implies(int type, int param, int value);
 567 void sql_insert_type_size(const char *member, int size);
 568 void sql_insert_local_values(const char *name, const char *value);
 569
 570 void sql_select_return_states(const char *cols, struct expression *call,
 571         int (*callback)(void*, int, char**, char**));
 572 void sql_select_caller_info(const char *cols, struct symbol *sym,
 573         int (*callback)(void*, int, char**, char**));
 574 void sql_select_call_implies(const char *cols, struct expression *call,
 575         int (*callback)(void*, int, char**, char**));
 576
 577 void sql_exec(int (*callback)(void*, int, char**, char**), const char *sql);
 578 void sql_mem_exec(int (*callback)(void*, int, char**, char**), const char *sql);
 579
 580 void open_smatch_db(void);
 581
 582 /* smatch_files.c */
 583 int open_data_file(const char *filename);
 584 struct token *get_tokens_file(const char *filename);
 585
 586 /* smatch.c */
 587 extern char *option_debug_check;
 588 extern char *option_project_str;
 589 extern char *data_dir;
 590 extern int option_no_data;
 591 extern int option_spammy;
 592 extern int option_full_path;
 593 extern int option_param_mapper;
 594 extern int option_info;
 595 extern int option_call_tree;
 596 extern int num_checks;
 597
 598 enum project_type {
 599         PROJ_NONE,
 600         PROJ_KERNEL,
 601         PROJ_WINE,
 602 };
 603 extern enum project_type option_project;
 604 const char *check_name(unsigned short id);
 605
 606
 607 /* smatch_buf_size.c */
 608 int get_array_size(struct expression *expr);
 609 int get_array_size_bytes(struct expression *expr);
 610 int get_array_size_bytes_min(struct expression *expr);
 611 int get_real_array_size(struct expression *expr);
 612
 613 /* smatch_capped.c */
 614 int is_capped(struct expression *expr);
 615 int is_capped_var_sym(const char *name, struct symbol *sym);
 616
 617 /* check_user_data.c */
 618 int is_user_macro(struct expression *expr);
 619 int is_user_data(struct expression *expr);
 620 int is_capped_user_data(struct expression *expr);
 621
 622 /* check_locking.c */
 623 void print_held_locks();
 624
 625 /* check_assigned_expr.c */
 626 struct expression *get_assigned_expr(struct expression *expr);
 627
 628 /* smatch_comparison.c */
 629 int get_comparison(struct expression *left, struct expression *right);
 630 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
 631 char *expr_equal_to_param(struct expression *expr);
 632 char *expr_lte_to_param(struct expression *expr);
 633
 634 /* smatch_sval.c */
 635 sval_t *sval_alloc(sval_t sval);
 636 sval_t *sval_alloc_permanent(sval_t sval);
 637 sval_t sval_blank(struct expression *expr);
 638 sval_t sval_type_val(struct symbol *type, long long val);
 639 sval_t sval_from_val(struct expression *expr, long long val);
 640 int sval_unsigned(sval_t sval);
 641 int sval_signed(sval_t sval);
 642 int sval_bits(sval_t sval);
 643 int sval_positive_bits(sval_t sval);
 644 int sval_bits_used(sval_t sval);
 645 int sval_is_negative(sval_t sval);
 646 int sval_is_positive(sval_t sval);
 647 int sval_is_min(sval_t sval);
 648 int sval_is_max(sval_t sval);
 649 int sval_is_a_min(sval_t sval);
 650 int sval_is_a_max(sval_t sval);
 651 int sval_is_negative_min(sval_t sval);
 652 int sval_cmp(sval_t one, sval_t two);
 653 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
 654 int sval_cmp_val(sval_t one, long long val);
 655 sval_t sval_min(sval_t one, sval_t two);
 656 sval_t sval_max(sval_t one, sval_t two);
 657 int sval_too_low(struct symbol *type, sval_t sval);
 658 int sval_too_high(struct symbol *type, sval_t sval);
 659 int sval_fits(struct symbol *type, sval_t sval);
 660 sval_t sval_cast(struct symbol *type, sval_t sval);
 661 sval_t sval_preop(sval_t sval, int op);
 662 sval_t sval_binop(sval_t left, int op, sval_t right);
 663 int sval_binop_overflows(sval_t left, int op, sval_t right);
 664 const char *sval_to_str(sval_t sval);
 665 const char *sval_to_numstr(sval_t sval);
 666 sval_t ll_to_sval(long long val);
 667
 668 /* smatch_string_list.c */
 669 int list_has_string(struct string_list *str_list, char *str);
 670 void insert_string(struct string_list **str_list, char *str);
 671 struct string_list *clone_str_list(struct string_list *orig);
 672 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
 673
 674 /* smatch_clear_buffer.c */
 675 int is_uninitialized(struct expression *expr);
 676 int has_uninitialized_members(struct expression *expr);
 677
 678 /* smatch_start_states.c */
 679 struct state_list *get_start_states(void);
 680
 681 /* smatch_recurse.c */
 682 int has_symbol(struct expression *expr, struct symbol *sym);
 683 int has_variable(struct expression *expr, struct expression *var);
 684
 685 #endif      /* !SMATCH_H_ */