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