smatch.h

   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
  18 #ifndef         SMATCH_H_
  19 # define        SMATCH_H_
  20
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <limits.h>
  24 #include <sys/time.h>
  25 #include "lib.h"
  26 #include "allocate.h"
  27 #include "scope.h"
  28 #include "parse.h"
  29 #include "expression.h"
  30 #include "avl.h"
  31
  32 typedef struct {
  33         struct symbol *type;
  34         union {
  35                 long long value;
  36                 unsigned long long uvalue;
  37         };
  38 } sval_t;
  39
  40 struct smatch_state {
  41         const char *name;
  42         void *data;
  43 };
  44 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
  45 extern struct smatch_state undefined;
  46 extern struct smatch_state merged;
  47 extern struct smatch_state true_state;
  48 extern struct smatch_state false_state;
  49 DECLARE_ALLOCATOR(smatch_state);
  50
  51 static inline void *INT_PTR(int i)
  52 {
  53         return (void *)(long)i;
  54 }
  55
  56 static inline int PTR_INT(void *p)
  57 {
  58         return (int)(long)p;
  59 }
  60
  61 struct tracker {
  62         char *name;
  63         struct symbol *sym;
  64         unsigned short owner;
  65 };
  66 DECLARE_ALLOCATOR(tracker);
  67 DECLARE_PTR_LIST(tracker_list, struct tracker);
  68
  69 /* The first 3 struct members must match struct tracker */
  70 struct sm_state {
  71         const char *name;
  72         struct symbol *sym;
  73         unsigned short owner;
  74         unsigned short merged:1;
  75         unsigned short implied:1;
  76         unsigned int nr_children;
  77         unsigned int line;
  78         struct smatch_state *state;
  79         struct stree *pool;
  80         struct sm_state *left;
  81         struct sm_state *right;
  82         struct state_list *possible;
  83 };
  84
  85 struct var_sym {
  86         char *var;
  87         struct symbol *sym;
  88 };
  89 DECLARE_ALLOCATOR(var_sym);
  90 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  91
  92 enum hook_type {
  93         EXPR_HOOK,
  94         STMT_HOOK,
  95         STMT_HOOK_AFTER,
  96         SYM_HOOK,
  97         STRING_HOOK,
  98         DECLARATION_HOOK,
  99         ASSIGNMENT_HOOK,
 100         RAW_ASSIGNMENT_HOOK,
 101         GLOBAL_ASSIGNMENT_HOOK,
 102         LOGIC_HOOK,
 103         CONDITION_HOOK,
 104         PRELOOP_HOOK,
 105         SELECT_HOOK,
 106         WHOLE_CONDITION_HOOK,
 107         FUNCTION_CALL_HOOK,
 108         CALL_HOOK_AFTER_INLINE,
 109         CALL_ASSIGNMENT_HOOK,
 110         MACRO_ASSIGNMENT_HOOK,
 111         BINOP_HOOK,
 112         OP_HOOK,
 113         DEREF_HOOK,
 114         CASE_HOOK,
 115         ASM_HOOK,
 116         CAST_HOOK,
 117         SIZEOF_HOOK,
 118         BASE_HOOK,
 119         FUNC_DEF_HOOK,
 120         AFTER_DEF_HOOK,
 121         END_FUNC_HOOK,
 122         AFTER_FUNC_HOOK,
 123         RETURN_HOOK,
 124         INLINE_FN_START,
 125         INLINE_FN_END,
 126         END_FILE_HOOK,
 127 };
 128
 129 #define TRUE 1
 130 #define FALSE 0
 131
 132 struct range_list;
 133
 134 void add_hook(void *func, enum hook_type type);
 135 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 136 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 137 void add_merge_hook(int client_id, merge_func_t *func);
 138 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 139 typedef void (scope_hook)(void *data);
 140 void add_scope_hook(scope_hook *hook, void *data);
 141 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 142 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 143                                 struct expression *assign_expr, void *data);
 144 typedef void (return_implies_hook)(struct expression *call_expr,
 145                                    int param, char *key, char *value);
 146 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 147 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 148
 149 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 150                               void *info);
 151 void add_implied_return_hook(const char *look_for,
 152                              implied_return_hook *call_back,
 153                              void *info);
 154 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 155                               void *info);
 156 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 157                               void *info);
 158 void return_implies_state(const char *look_for, long long start, long long end,
 159                          implication_hook *call_back, void *info);
 160 void select_return_states_hook(int type, return_implies_hook *callback);
 161 void select_return_states_before(void (*fn)(void));
 162 void select_return_states_after(void (*fn)(void));
 163 int get_implied_return(struct expression *expr, struct range_list **rl);
 164
 165 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 166 void add_modification_hook(int owner, modification_hook *call_back);
 167 void add_indirect_modification_hook(int owner, modification_hook *call_back);
 168
 169 int outside_of_function(void);
 170 const char *get_filename(void);
 171 const char *get_base_file(void);
 172 char *get_function(void);
 173 int get_lineno(void);
 174 extern int final_pass;
 175 extern struct symbol *cur_func_sym;
 176 extern int option_debug;
 177 extern int local_debug;
 178 extern int option_info;
 179 extern struct stree *global_states;
 180 int is_silenced_function(void);
 181
 182 extern FILE *sm_outfd;
 183 #define sm_printf(msg...) do { if (final_pass || option_debug) fprintf(sm_outfd, msg); } while (0)
 184
 185 static inline void sm_prefix(void)
 186 {
 187         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 188 }
 189
 190 static inline void print_implied_debug_msg();
 191
 192 #define sm_msg(msg...) \
 193 do {                                                           \
 194         print_implied_debug_msg();                             \
 195         if (!option_debug && !final_pass)                      \
 196                 break;                                         \
 197         if (!option_info && is_silenced_function())            \
 198                 break;                                         \
 199         sm_prefix();                                           \
 200         sm_printf(msg);                                        \
 201         sm_printf("\n");                                       \
 202 } while (0)
 203
 204 #define local_debug(msg...)                                     \
 205 do {                                                            \
 206         if (local_debug)                                        \
 207                 sm_msg(msg);                                    \
 208 } while (0)
 209
 210 extern char *implied_debug_msg;
 211 static inline void print_implied_debug_msg(void)
 212 {
 213         static struct symbol *last_printed = NULL;
 214
 215         if (!implied_debug_msg)
 216                 return;
 217         if (last_printed == cur_func_sym)
 218                 return;
 219         last_printed = cur_func_sym;
 220         sm_msg("%s", implied_debug_msg);
 221 }
 222
 223 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 224
 225 #define sm_info(msg...) do {                                    \
 226         if (option_debug || (option_info && final_pass)) {      \
 227                 sm_prefix();                                    \
 228                 sm_printf("info: ");                            \
 229                 sm_printf(msg);                                 \
 230                 sm_printf("\n");                                \
 231         }                                                       \
 232 } while(0)
 233
 234 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 235 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 236 struct state_list *get_possible_states(int owner, const char *name,
 237                                        struct symbol *sym);
 238 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 239 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 240                struct smatch_state *state);
 241 struct sm_state *set_state_expr(int owner, struct expression *expr,
 242                 struct smatch_state *state);
 243 void delete_state(int owner, const char *name, struct symbol *sym);
 244 void delete_state_expr(int owner, struct expression *expr);
 245 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 246                            struct smatch_state *true_state,
 247                            struct smatch_state *false_state);
 248 void set_true_false_states_expr(int owner, struct expression *expr,
 249                            struct smatch_state *true_state,
 250                            struct smatch_state *false_state);
 251
 252 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 253 struct stree *get_all_states_stree(int id);
 254 struct stree *__get_cur_stree(void);
 255 int is_reachable(void);
 256
 257 /* smatch_helper.c */
 258 char *alloc_string(const char *str);
 259 void free_string(char *str);
 260 void append(char *dest, const char *data, int buff_len);
 261 void remove_parens(char *str);
 262 struct smatch_state *alloc_state_num(int num);
 263 struct expression *get_argument_from_call_expr(struct expression_list *args,
 264                                                int num);
 265
 266 char *expr_to_var(struct expression *expr);
 267 char *expr_to_str(struct expression *expr);
 268 char *expr_to_str_sym(struct expression *expr,
 269                                      struct symbol **sym_ptr);
 270 char *expr_to_var_sym(struct expression *expr,
 271                              struct symbol **sym_ptr);
 272
 273 int sym_name_is(const char *name, struct expression *expr);
 274 int get_const_value(struct expression *expr, sval_t *sval);
 275 int get_value(struct expression *expr, sval_t *val);
 276 int get_implied_value(struct expression *expr, sval_t *val);
 277 int get_implied_min(struct expression *expr, sval_t *sval);
 278 int get_implied_max(struct expression *expr, sval_t *val);
 279 int get_hard_max(struct expression *expr, sval_t *sval);
 280 int get_fuzzy_min(struct expression *expr, sval_t *min);
 281 int get_fuzzy_max(struct expression *expr, sval_t *max);
 282 int get_absolute_min(struct expression *expr, sval_t *sval);
 283 int get_absolute_max(struct expression *expr, sval_t *sval);
 284 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 285 int parse_call_math_rl(struct expression *call, char *math, struct range_list **rl);
 286 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 287 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 288 int is_zero(struct expression *expr);
 289 int known_condition_true(struct expression *expr);
 290 int known_condition_false(struct expression *expr);
 291 int implied_condition_true(struct expression *expr);
 292 int implied_condition_false(struct expression *expr);
 293
 294 int is_array(struct expression *expr);
 295 struct expression *get_array_name(struct expression *expr);
 296 struct expression *get_array_offset(struct expression *expr);
 297 const char *show_state(struct smatch_state *state);
 298 struct statement *get_expression_statement(struct expression *expr);
 299 struct expression *strip_parens(struct expression *expr);
 300 struct expression *strip_expr(struct expression *expr);
 301 void scoped_state(int my_id, const char *name, struct symbol *sym);
 302 int is_error_return(struct expression *expr);
 303 int getting_address(void);
 304 char *get_member_name(struct expression *expr);
 305 char *get_fnptr_name(struct expression *expr);
 306 int cmp_pos(struct position pos1, struct position pos2);
 307 int positions_eq(struct position pos1, struct position pos2);
 308 struct statement *get_current_statement(void);
 309 struct statement *get_prev_statement(void);
 310 int get_param_num_from_sym(struct symbol *sym);
 311 int get_param_num(struct expression *expr);
 312 int ms_since(struct timeval *start);
 313
 314 /* smatch_type.c */
 315 struct symbol *get_real_base_type(struct symbol *sym);
 316 int type_bits(struct symbol *type);
 317 int type_bytes(struct symbol *type);
 318 int type_positive_bits(struct symbol *type);
 319 struct symbol *get_pointer_type(struct expression *expr);
 320 struct symbol *get_type(struct expression *expr);
 321 int type_unsigned(struct symbol *base_type);
 322 int type_signed(struct symbol *base_type);
 323 int expr_unsigned(struct expression *expr);
 324 int returns_unsigned(struct symbol *base_type);
 325 int is_pointer(struct expression *expr);
 326 int returns_pointer(struct symbol *base_type);
 327 sval_t sval_type_max(struct symbol *base_type);
 328 sval_t sval_type_min(struct symbol *base_type);
 329 int nr_bits(struct expression *expr);
 330 int is_void_pointer(struct expression *expr);
 331 int is_char_pointer(struct expression *expr);
 332 int is_string(struct expression *expr);
 333 int is_static(struct expression *expr);
 334 int types_equiv(struct symbol *one, struct symbol *two);
 335 int fn_static(void);
 336 const char *global_static();
 337 struct symbol *cur_func_return_type(void);
 338 struct symbol *get_arg_type(struct expression *fn, int arg);
 339 struct symbol *get_member_type_from_key(struct expression *expr, char *key);
 340 int is_struct(struct expression *expr);
 341 char *type_to_str(struct symbol *sym);
 342
 343 /* smatch_ignore.c */
 344 void add_ignore(int owner, const char *name, struct symbol *sym);
 345 int is_ignored(int owner, const char *name, struct symbol *sym);
 346
 347 /* smatch_var_sym */
 348 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 349 struct var_sym_list *expr_to_vsl(struct expression *expr);
 350 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 351 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 352 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 353 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 354 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 355 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 356 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 357 void free_var_sym_list(struct var_sym_list **list);
 358 void free_var_syms_and_list(struct var_sym_list **list);
 359
 360 /* smatch_tracker */
 361 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 362 void add_tracker(struct tracker_list **list, int owner, const char *name,
 363                 struct symbol *sym);
 364 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 365 void del_tracker(struct tracker_list **list, int owner, const char *name,
 366                 struct symbol *sym);
 367 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 368                 struct symbol *sym);
 369 void free_tracker_list(struct tracker_list **list);
 370 void free_trackers_and_list(struct tracker_list **list);
 371
 372 /* smatch_conditions */
 373 int in_condition(void);
 374
 375 /* smatch_flow.c */
 376
 377 extern int __in_fake_assign;
 378 void smatch (int argc, char **argv);
 379 int inside_loop(void);
 380 int definitely_inside_loop(void);
 381 struct expression *get_switch_expr(void);
 382 int in_expression_statement(void);
 383 void __process_post_op_stack(void);
 384 void __split_expr(struct expression *expr);
 385 void __split_stmt(struct statement *stmt);
 386 extern int __in_function_def;
 387 extern int option_assume_loops;
 388 extern int option_known_conditions;
 389 extern int option_two_passes;
 390 extern int option_no_db;
 391 extern int option_file_output;
 392 extern int option_time;
 393 extern struct expression_list *big_expression_stack;
 394 extern struct statement_list *big_statement_stack;
 395 int inlinable(struct expression *expr);
 396 extern int __inline_call;
 397 extern struct expression *__inline_fn;
 398 extern int __in_pre_condition;
 399 extern int __bail_on_rest_of_function;
 400
 401 /* smatch_struct_assignment.c */
 402 struct expression *get_faked_expression(void);
 403 void __fake_struct_member_assignments(struct expression *expr);
 404
 405 /* smatch_project.c */
 406 int is_no_inline_function(const char *function);
 407
 408 /* smatch_conditions */
 409 void __split_whole_condition(struct expression *expr);
 410 void __handle_logic(struct expression *expr);
 411 int is_condition(struct expression *expr);
 412 int __handle_condition_assigns(struct expression *expr);
 413 int __handle_select_assigns(struct expression *expr);
 414 int __handle_expr_statement_assigns(struct expression *expr);
 415
 416 /* smatch_implied.c */
 417 extern int option_debug_implied;
 418 extern int option_debug_related;
 419 extern int option_no_implied;
 420 struct range_list_stack;
 421 struct stree *__implied_case_stree(struct expression *switch_expr,
 422                                  struct expression *case_expr,
 423                                  struct range_list_stack **remaining_cases,
 424                                  struct stree **raw_stree);
 425 struct range_list *__get_implied_values(struct expression *switch_expr);
 426 void overwrite_states_using_pool(struct sm_state *sm);
 427
 428 /* smatch_extras.c */
 429 #define SMATCH_EXTRA 1 /* this is my_id from smatch extra set in smatch.c */
 430
 431 struct data_range {
 432         sval_t min;
 433         sval_t max;
 434 };
 435
 436 static const long long valid_ptr_min = 4096;
 437 static const long long valid_ptr_max = LONG_MAX;
 438 static const sval_t valid_ptr_min_sval = {
 439         .type = &ptr_ctype,
 440         {.value = 4096},
 441 };
 442 static const sval_t valid_ptr_max_sval = {
 443         .type = &ptr_ctype,
 444         {.value = LONG_MAX},
 445 };
 446 static const sval_t array_min_sval = {
 447         .type = &ptr_ctype,
 448         {.value = 100000},
 449 };
 450 static const sval_t array_max_sval = {
 451         .type = &ptr_ctype,
 452         {.value = 200000},
 453 };
 454
 455 /* smatch_absolute.c */
 456 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 457 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 458
 459 /* smatch_local_values.c */
 460 int get_local_rl(struct expression *expr, struct range_list **rl);
 461 int get_local_max_helper(struct expression *expr, sval_t *sval);
 462 int get_local_min_helper(struct expression *expr, sval_t *sval);
 463
 464 /* smatch_type_value.c */
 465 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 466
 467 /* smatch_states.c */
 468 void __push_fake_cur_stree();
 469 struct stree *__pop_fake_cur_stree();
 470 void __free_fake_cur_stree();
 471 void __set_fake_cur_stree_fast(struct stree *stree);
 472 void __pop_fake_cur_stree_fast(void);
 473 void __merge_stree_into_cur(struct stree *stree);
 474
 475 int unreachable(void);
 476 void __set_sm(struct sm_state *sm);
 477 void __set_true_false_sm(struct sm_state *true_state,
 478                         struct sm_state *false_state);
 479 void nullify_path(void);
 480 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 481                                void *unused);
 482 void __unnullify_path(void);
 483 int __path_is_null(void);
 484 void save_all_states(void);
 485 void restore_all_states(void);
 486 void free_goto_stack(void);
 487 void clear_all_states(void);
 488
 489 struct sm_state *get_sm_state(int owner, const char *name,
 490                                 struct symbol *sym);
 491 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 492 void __push_true_states(void);
 493 void __use_false_states(void);
 494 void __discard_false_states(void);
 495 void __merge_false_states(void);
 496 void __merge_true_states(void);
 497
 498 void __negate_cond_stacks(void);
 499 void __use_pre_cond_states(void);
 500 void __use_cond_true_states(void);
 501 void __use_cond_false_states(void);
 502 void __push_cond_stacks(void);
 503 struct stree *__copy_cond_true_states(void);
 504 struct stree *__copy_cond_false_states(void);
 505 struct stree *__pop_cond_true_stack(void);
 506 struct stree *__pop_cond_false_stack(void);
 507 void __and_cond_states(void);
 508 void __or_cond_states(void);
 509 void __save_pre_cond_states(void);
 510 void __discard_pre_cond_states(void);
 511 void __use_cond_states(void);
 512 extern struct state_list *__last_base_slist;
 513
 514 void __warn_on_silly_pre_loops(void);
 515
 516 void __push_continues(void);
 517 void __discard_continues(void);
 518 void __process_continues(void);
 519 void __merge_continues(void);
 520
 521 void __push_breaks(void);
 522 void __process_breaks(void);
 523 int __has_breaks(void);
 524 void __merge_breaks(void);
 525 void __use_breaks(void);
 526
 527 void __save_switch_states(struct expression *switch_expr);
 528 void __discard_switches(void);
 529 void __merge_switches(struct expression *switch_expr, struct expression *case_expr);
 530 void __push_default(void);
 531 void __set_default(void);
 532 int __pop_default(void);
 533
 534 void __push_conditions(void);
 535 void __discard_conditions(void);
 536
 537 void __save_gotos(const char *name);
 538 void __merge_gotos(const char *name);
 539
 540 void __print_cur_stree(void);
 541
 542 /* smatch_hooks.c */
 543 void __pass_to_client(void *data, enum hook_type type);
 544 void __pass_to_client_no_data(enum hook_type type);
 545 void __pass_case_to_client(struct expression *switch_expr,
 546                            struct expression *case_expr);
 547 int __has_merge_function(int client_id);
 548 struct smatch_state *__client_merge_function(int owner,
 549                                              struct smatch_state *s1,
 550                                              struct smatch_state *s2);
 551 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 552 void __push_scope_hooks(void);
 553 void __call_scope_hooks(void);
 554
 555 /* smatch_function_hooks.c */
 556 void create_function_hook_hash(void);
 557 void __match_initializer_call(struct symbol *sym);
 558
 559 /* smatch_db.c */
 560 enum info_type {
 561         INTERNAL        = 0,
 562         /*
 563          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 564          * number it can't be re-used right away so there may be gaps.
 565          * We select these in order by type so if the order matters, then give
 566          * it a number below 100-999,9000-9999 ranges. */
 567
 568         PARAM_CLEARED   = 101,
 569         FILTER_VALUE    = 102,
 570
 571         PARAM_VALUE     = 1001,
 572         BUF_SIZE        = 1002,
 573         USER_DATA       = 1003,
 574         CAPPED_DATA     = 1004,
 575         RETURN_VALUE    = 1005,
 576         DEREFERENCE     = 1006,
 577         RANGE_CAP       = 1007,
 578         LOCK_HELD       = 1008,
 579         LOCK_RELEASED   = 1009,
 580         ABSOLUTE_LIMITS = 1010,
 581         LIMITED_VALUE   = 1011,
 582         ADDED_VALUE     = 1012,
 583         PARAM_FREED     = 1013,
 584         DATA_SOURCE     = 1014,
 585         FUZZY_MAX       = 1015,
 586         STR_LEN         = 1016,
 587
 588         /* put random temporary stuff in the 7000-7999 range for testing */
 589         USER_DATA2      = 9017,
 590         USER_DATA_SET   = 9018,
 591         USER_DATA_LIMITED = 9019,
 592 };
 593
 594 void debug_sql(const char *sql);
 595 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 596 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct smatch_state *state));
 597 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 598 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));
 599 void select_call_implies_hook(int type, void (*callback)(struct expression *arg, char *key, char *value));
 600 struct range_list *db_return_vals(struct expression *expr);
 601 char *return_state_to_var_sym(struct expression *expr, int param, char *key, struct symbol **sym);
 602 char *get_variable_from_key(struct expression *arg, char *key, struct symbol **sym);
 603 const char *get_param_name(struct sm_state *sm);
 604
 605 #define run_sql(call_back, data, sql...)    \
 606 do {                                  \
 607         char sql_txt[1024];           \
 608         if (option_no_db)             \
 609                 break;                \
 610         snprintf(sql_txt, 1024, sql); \
 611         debug_sql(sql_txt);           \
 612         sql_exec(call_back, data, sql_txt); \
 613 } while (0)
 614
 615 /* like run_sql() but for the in-memory database */
 616 #define mem_sql(call_back, data, sql...)                                                \
 617 do {                                                                            \
 618         char sql_txt[1024];                                                     \
 619                                                                                 \
 620         snprintf(sql_txt, sizeof(sql_txt), sql);                                \
 621         sm_debug("in-mem: %s\n", sql_txt);                                      \
 622         sql_mem_exec(call_back, data, sql_txt);                                 \
 623 } while (0)
 624
 625 void sql_insert_return_states(int return_id, const char *return_ranges,
 626                 int type, int param, const char *key, const char *value);
 627 void sql_insert_caller_info(struct expression *call, int type, int param,
 628                 const char *key, const char *value);
 629 void sql_insert_function_ptr(const char *fn, const char *struct_name);
 630 void sql_insert_return_values(const char *return_values);
 631 void sql_insert_call_implies(int type, int param, const char *key, const char *value);
 632 void sql_insert_function_type_size(const char *member, const char *ranges);
 633 void sql_insert_local_values(const char *name, const char *value);
 634 void sql_insert_function_type_value(const char *type, const char *value);
 635 void sql_insert_function_type_info(int param, const char *value);
 636
 637 void sql_select_return_states(const char *cols, struct expression *call,
 638         int (*callback)(void*, int, char**, char**), void *info);
 639 void sql_select_caller_info(const char *cols, struct symbol *sym,
 640         int (*callback)(void*, int, char**, char**));
 641 void sql_select_call_implies(const char *cols, struct expression *call,
 642         int (*callback)(void*, int, char**, char**));
 643
 644 void sql_exec(int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 645 void sql_mem_exec(int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 646
 647 void open_smatch_db(void);
 648
 649 /* smatch_files.c */
 650 int open_data_file(const char *filename);
 651 struct token *get_tokens_file(const char *filename);
 652
 653 /* smatch.c */
 654 extern char *option_debug_check;
 655 extern char *option_project_str;
 656 extern char *data_dir;
 657 extern int option_no_data;
 658 extern int option_spammy;
 659 extern int option_full_path;
 660 extern int option_param_mapper;
 661 extern int option_call_tree;
 662 extern int num_checks;
 663
 664 enum project_type {
 665         PROJ_NONE,
 666         PROJ_KERNEL,
 667         PROJ_WINE,
 668 };
 669 extern enum project_type option_project;
 670 const char *check_name(unsigned short id);
 671
 672
 673 /* smatch_buf_size.c */
 674 int get_array_size(struct expression *expr);
 675 int get_array_size_bytes(struct expression *expr);
 676 int get_array_size_bytes_min(struct expression *expr);
 677 int get_array_size_bytes_max(struct expression *expr);
 678 struct range_list *get_array_size_bytes_rl(struct expression *expr);
 679 int get_real_array_size(struct expression *expr);
 680 /* smatch_strlen.c */
 681 int get_implied_strlen(struct expression *expr, struct range_list **rl);
 682 int get_size_from_strlen(struct expression *expr);
 683
 684 /* smatch_capped.c */
 685 int is_capped(struct expression *expr);
 686 int is_capped_var_sym(const char *name, struct symbol *sym);
 687
 688 /* check_user_data.c */
 689 int is_user_macro(struct expression *expr);
 690 int is_user_data(struct expression *expr);
 691 int is_capped_user_data(struct expression *expr);
 692 int implied_user_data(struct expression *expr, struct range_list **rl);
 693
 694 /* check_locking.c */
 695 void print_held_locks();
 696
 697 /* check_assigned_expr.c */
 698 struct expression *get_assigned_expr(struct expression *expr);
 699 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
 700
 701 /* smatch_comparison.c */
 702 int get_comparison(struct expression *left, struct expression *right);
 703 int get_comparison_strings(const char *one, const char *two);
 704 int possible_comparison(struct expression *a, int comparison, struct expression *b);
 705 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
 706 char *expr_equal_to_param(struct expression *expr, int ignore);
 707 char *expr_lte_to_param(struct expression *expr, int ignore);
 708 char *expr_param_comparison(struct expression *expr, int ignore);
 709 int flip_comparison(int op);
 710 int negate_comparison(int op);
 711 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
 712
 713 /* smatch_sval.c */
 714 sval_t *sval_alloc(sval_t sval);
 715 sval_t *sval_alloc_permanent(sval_t sval);
 716 sval_t sval_blank(struct expression *expr);
 717 sval_t sval_type_val(struct symbol *type, long long val);
 718 sval_t sval_from_val(struct expression *expr, long long val);
 719 int sval_unsigned(sval_t sval);
 720 int sval_signed(sval_t sval);
 721 int sval_bits(sval_t sval);
 722 int sval_positive_bits(sval_t sval);
 723 int sval_bits_used(sval_t sval);
 724 int sval_is_negative(sval_t sval);
 725 int sval_is_positive(sval_t sval);
 726 int sval_is_min(sval_t sval);
 727 int sval_is_max(sval_t sval);
 728 int sval_is_a_min(sval_t sval);
 729 int sval_is_a_max(sval_t sval);
 730 int sval_is_negative_min(sval_t sval);
 731 int sval_cmp(sval_t one, sval_t two);
 732 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
 733 int sval_cmp_val(sval_t one, long long val);
 734 sval_t sval_min(sval_t one, sval_t two);
 735 sval_t sval_max(sval_t one, sval_t two);
 736 int sval_too_low(struct symbol *type, sval_t sval);
 737 int sval_too_high(struct symbol *type, sval_t sval);
 738 int sval_fits(struct symbol *type, sval_t sval);
 739 sval_t sval_cast(struct symbol *type, sval_t sval);
 740 sval_t sval_preop(sval_t sval, int op);
 741 sval_t sval_binop(sval_t left, int op, sval_t right);
 742 int sval_binop_overflows(sval_t left, int op, sval_t right);
 743 const char *sval_to_str(sval_t sval);
 744 const char *sval_to_numstr(sval_t sval);
 745 sval_t ll_to_sval(long long val);
 746
 747 /* smatch_string_list.c */
 748 int list_has_string(struct string_list *str_list, char *str);
 749 void insert_string(struct string_list **str_list, char *str);
 750 struct string_list *clone_str_list(struct string_list *orig);
 751 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
 752
 753 /* smatch_start_states.c */
 754 struct stree *get_start_states(void);
 755
 756 /* smatch_recurse.c */
 757 int has_symbol(struct expression *expr, struct symbol *sym);
 758 int has_variable(struct expression *expr, struct expression *var);
 759 int has_inc_dec(struct expression *expr);
 760
 761 /* smatch_stored_conditions.c */
 762 struct smatch_state *get_stored_condition(struct expression *expr);
 763
 764 /* check_string_len.c */
 765 int get_formatted_string_size(struct expression *call, int arg);
 766
 767 /* smatch_param_set.c */
 768 int param_was_set(struct expression *expr);
 769
 770 /* smatch_links.c */
 771 void set_up_link_functions(int id, int linkid);
 772 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
 773
 774 #endif      /* !SMATCH_H_ */