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 ghost;
  47 extern struct smatch_state merged;
  48 extern struct smatch_state true_state;
  49 extern struct smatch_state false_state;
  50 DECLARE_ALLOCATOR(smatch_state);
  51
  52 static inline void *INT_PTR(int i)
  53 {
  54         return (void *)(long)i;
  55 }
  56
  57 static inline int PTR_INT(void *p)
  58 {
  59         return (int)(long)p;
  60 }
  61
  62 struct tracker {
  63         char *name;
  64         struct symbol *sym;
  65         unsigned short owner;
  66 };
  67 DECLARE_ALLOCATOR(tracker);
  68 DECLARE_PTR_LIST(tracker_list, struct tracker);
  69
  70 /* The first 3 struct members must match struct tracker */
  71 struct sm_state {
  72         const char *name;
  73         struct symbol *sym;
  74         unsigned short owner;
  75         unsigned short merged:1;
  76         unsigned short implied:1;
  77         unsigned int nr_children;
  78         unsigned int line;
  79         struct smatch_state *state;
  80         struct stree *pool;
  81         struct sm_state *left;
  82         struct sm_state *right;
  83         struct state_list *possible;
  84 };
  85
  86 struct var_sym {
  87         char *var;
  88         struct symbol *sym;
  89 };
  90 DECLARE_ALLOCATOR(var_sym);
  91 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  92
  93 enum hook_type {
  94         EXPR_HOOK,
  95         STMT_HOOK,
  96         STMT_HOOK_AFTER,
  97         SYM_HOOK,
  98         STRING_HOOK,
  99         DECLARATION_HOOK,
 100         ASSIGNMENT_HOOK,
 101         RAW_ASSIGNMENT_HOOK,
 102         GLOBAL_ASSIGNMENT_HOOK,
 103         LOGIC_HOOK,
 104         CONDITION_HOOK,
 105         PRELOOP_HOOK,
 106         SELECT_HOOK,
 107         WHOLE_CONDITION_HOOK,
 108         FUNCTION_CALL_HOOK,
 109         CALL_HOOK_AFTER_INLINE,
 110         FUNCTION_CALL_HOOK_AFTER,
 111         CALL_ASSIGNMENT_HOOK,
 112         MACRO_ASSIGNMENT_HOOK,
 113         BINOP_HOOK,
 114         OP_HOOK,
 115         DEREF_HOOK,
 116         CASE_HOOK,
 117         ASM_HOOK,
 118         CAST_HOOK,
 119         SIZEOF_HOOK,
 120         BASE_HOOK,
 121         FUNC_DEF_HOOK,
 122         AFTER_DEF_HOOK,
 123         END_FUNC_HOOK,
 124         AFTER_FUNC_HOOK,
 125         RETURN_HOOK,
 126         INLINE_FN_START,
 127         INLINE_FN_END,
 128         END_FILE_HOOK,
 129 };
 130
 131 #define TRUE 1
 132 #define FALSE 0
 133
 134 struct range_list;
 135
 136 void add_hook(void *func, enum hook_type type);
 137 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 138 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 139 void add_merge_hook(int client_id, merge_func_t *func);
 140 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 141 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *sm));
 142 typedef void (scope_hook)(void *data);
 143 void add_scope_hook(scope_hook *hook, void *data);
 144 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 145 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 146                                 struct expression *assign_expr, void *data);
 147 typedef void (return_implies_hook)(struct expression *call_expr,
 148                                    int param, char *key, char *value);
 149 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 150 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 151
 152 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 153                               void *info);
 154 void add_implied_return_hook(const char *look_for,
 155                              implied_return_hook *call_back,
 156                              void *info);
 157 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 158                               void *info);
 159 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 160                               void *info);
 161 void return_implies_state(const char *look_for, long long start, long long end,
 162                          implication_hook *call_back, void *info);
 163 void select_return_states_hook(int type, return_implies_hook *callback);
 164 void select_return_states_before(void (*fn)(void));
 165 void select_return_states_after(void (*fn)(void));
 166 int get_implied_return(struct expression *expr, struct range_list **rl);
 167 void allocate_hook_memory(void);
 168
 169 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 170 void add_modification_hook(int owner, modification_hook *call_back);
 171 void add_indirect_modification_hook(int owner, modification_hook *call_back);
 172
 173 int outside_of_function(void);
 174 const char *get_filename(void);
 175 const char *get_base_file(void);
 176 char *get_function(void);
 177 int get_lineno(void);
 178 extern int final_pass;
 179 extern struct symbol *cur_func_sym;
 180 extern int option_debug;
 181 extern int local_debug;
 182 extern int option_info;
 183 extern char *trace_variable;
 184 extern struct stree *global_states;
 185 int is_silenced_function(void);
 186
 187 extern FILE *sm_outfd;
 188 #define sm_printf(msg...) do { if (final_pass || option_debug) fprintf(sm_outfd, msg); } while (0)
 189
 190 static inline void sm_prefix(void)
 191 {
 192         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 193 }
 194
 195 static inline void print_implied_debug_msg();
 196
 197 #define sm_msg(msg...) \
 198 do {                                                           \
 199         print_implied_debug_msg();                             \
 200         if (!option_debug && !final_pass)                      \
 201                 break;                                         \
 202         if (!option_info && is_silenced_function())            \
 203                 break;                                         \
 204         sm_prefix();                                           \
 205         sm_printf(msg);                                        \
 206         sm_printf("\n");                                       \
 207 } while (0)
 208
 209 #define local_debug(msg...)                                     \
 210 do {                                                            \
 211         if (local_debug)                                        \
 212                 sm_msg(msg);                                    \
 213 } while (0)
 214
 215 extern char *implied_debug_msg;
 216 static inline void print_implied_debug_msg(void)
 217 {
 218         static struct symbol *last_printed = NULL;
 219
 220         if (!implied_debug_msg)
 221                 return;
 222         if (last_printed == cur_func_sym)
 223                 return;
 224         last_printed = cur_func_sym;
 225         sm_msg("%s", implied_debug_msg);
 226 }
 227
 228 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 229
 230 #define sm_info(msg...) do {                                    \
 231         if (option_debug || (option_info && final_pass)) {      \
 232                 sm_prefix();                                    \
 233                 sm_printf("info: ");                            \
 234                 sm_printf(msg);                                 \
 235                 sm_printf("\n");                                \
 236         }                                                       \
 237 } while(0)
 238
 239 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 240 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 241 struct state_list *get_possible_states(int owner, const char *name,
 242                                        struct symbol *sym);
 243 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 244 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 245                struct smatch_state *state);
 246 struct sm_state *set_state_expr(int owner, struct expression *expr,
 247                 struct smatch_state *state);
 248 void delete_state(int owner, const char *name, struct symbol *sym);
 249 void delete_state_expr(int owner, struct expression *expr);
 250 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 251                            struct smatch_state *true_state,
 252                            struct smatch_state *false_state);
 253 void set_true_false_states_expr(int owner, struct expression *expr,
 254                            struct smatch_state *true_state,
 255                            struct smatch_state *false_state);
 256
 257 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 258 struct stree *get_all_states_stree(int id);
 259 struct stree *__get_cur_stree(void);
 260 int is_reachable(void);
 261
 262 /* smatch_helper.c */
 263 char *alloc_string(const char *str);
 264 void free_string(char *str);
 265 void append(char *dest, const char *data, int buff_len);
 266 void remove_parens(char *str);
 267 struct smatch_state *alloc_state_num(int num);
 268 struct expression *get_argument_from_call_expr(struct expression_list *args,
 269                                                int num);
 270
 271 char *expr_to_var(struct expression *expr);
 272 struct symbol *expr_to_sym(struct expression *expr);
 273 char *expr_to_str(struct expression *expr);
 274 char *expr_to_str_sym(struct expression *expr,
 275                                      struct symbol **sym_ptr);
 276 char *expr_to_var_sym(struct expression *expr,
 277                              struct symbol **sym_ptr);
 278
 279 int sym_name_is(const char *name, struct expression *expr);
 280 int get_const_value(struct expression *expr, sval_t *sval);
 281 int get_value(struct expression *expr, sval_t *val);
 282 int get_implied_value(struct expression *expr, sval_t *val);
 283 int get_implied_min(struct expression *expr, sval_t *sval);
 284 int get_implied_max(struct expression *expr, sval_t *val);
 285 int get_hard_max(struct expression *expr, sval_t *sval);
 286 int get_fuzzy_min(struct expression *expr, sval_t *min);
 287 int get_fuzzy_max(struct expression *expr, sval_t *max);
 288 int get_absolute_min(struct expression *expr, sval_t *sval);
 289 int get_absolute_max(struct expression *expr, sval_t *sval);
 290 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 291 int parse_call_math_rl(struct expression *call, char *math, struct range_list **rl);
 292 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 293 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 294 int is_zero(struct expression *expr);
 295 int known_condition_true(struct expression *expr);
 296 int known_condition_false(struct expression *expr);
 297 int implied_condition_true(struct expression *expr);
 298 int implied_condition_false(struct expression *expr);
 299 int can_integer_overflow(struct symbol *type, struct expression *expr);
 300
 301 int is_array(struct expression *expr);
 302 struct expression *get_array_base(struct expression *expr);
 303 struct expression *get_array_offset(struct expression *expr);
 304 const char *show_state(struct smatch_state *state);
 305 struct statement *get_expression_statement(struct expression *expr);
 306 struct expression *strip_parens(struct expression *expr);
 307 struct expression *strip_expr(struct expression *expr);
 308 void scoped_state(int my_id, const char *name, struct symbol *sym);
 309 int is_error_return(struct expression *expr);
 310 int getting_address(void);
 311 char *get_member_name(struct expression *expr);
 312 char *get_fnptr_name(struct expression *expr);
 313 int cmp_pos(struct position pos1, struct position pos2);
 314 int positions_eq(struct position pos1, struct position pos2);
 315 struct statement *get_current_statement(void);
 316 struct statement *get_prev_statement(void);
 317 int get_param_num_from_sym(struct symbol *sym);
 318 int get_param_num(struct expression *expr);
 319 int ms_since(struct timeval *start);
 320 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 321 int parent_is_gone(struct expression *expr);
 322 int invert_op(int op);
 323
 324 /* smatch_type.c */
 325 struct symbol *get_real_base_type(struct symbol *sym);
 326 int type_bits(struct symbol *type);
 327 int type_bytes(struct symbol *type);
 328 int type_positive_bits(struct symbol *type);
 329 struct symbol *get_pointer_type(struct expression *expr);
 330 struct symbol *get_type(struct expression *expr);
 331 int type_unsigned(struct symbol *base_type);
 332 int type_signed(struct symbol *base_type);
 333 int expr_unsigned(struct expression *expr);
 334 int returns_unsigned(struct symbol *base_type);
 335 int is_pointer(struct expression *expr);
 336 int returns_pointer(struct symbol *base_type);
 337 sval_t sval_type_max(struct symbol *base_type);
 338 sval_t sval_type_min(struct symbol *base_type);
 339 int nr_bits(struct expression *expr);
 340 int is_void_pointer(struct expression *expr);
 341 int is_char_pointer(struct expression *expr);
 342 int is_string(struct expression *expr);
 343 int is_static(struct expression *expr);
 344 int types_equiv(struct symbol *one, struct symbol *two);
 345 int fn_static(void);
 346 const char *global_static();
 347 struct symbol *cur_func_return_type(void);
 348 struct symbol *get_arg_type(struct expression *fn, int arg);
 349 struct symbol *get_member_type_from_key(struct expression *expr, char *key);
 350 int is_struct(struct expression *expr);
 351 char *type_to_str(struct symbol *type);
 352
 353 /* smatch_ignore.c */
 354 void add_ignore(int owner, const char *name, struct symbol *sym);
 355 int is_ignored(int owner, const char *name, struct symbol *sym);
 356
 357 /* smatch_var_sym */
 358 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 359 struct var_sym_list *expr_to_vsl(struct expression *expr);
 360 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 361 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 362 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 363 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 364 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 365 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 366 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 367 void free_var_sym_list(struct var_sym_list **list);
 368 void free_var_syms_and_list(struct var_sym_list **list);
 369
 370 /* smatch_tracker */
 371 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 372 void add_tracker(struct tracker_list **list, int owner, const char *name,
 373                 struct symbol *sym);
 374 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 375 void del_tracker(struct tracker_list **list, int owner, const char *name,
 376                 struct symbol *sym);
 377 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 378                 struct symbol *sym);
 379 void free_tracker_list(struct tracker_list **list);
 380 void free_trackers_and_list(struct tracker_list **list);
 381
 382 /* smatch_conditions */
 383 int in_condition(void);
 384
 385 /* smatch_flow.c */
 386
 387 extern int __in_fake_assign;
 388 void smatch (int argc, char **argv);
 389 int inside_loop(void);
 390 int definitely_inside_loop(void);
 391 struct expression *get_switch_expr(void);
 392 int in_expression_statement(void);
 393 void __process_post_op_stack(void);
 394 void __split_expr(struct expression *expr);
 395 void __split_stmt(struct statement *stmt);
 396 extern int __in_function_def;
 397 extern int option_assume_loops;
 398 extern int option_known_conditions;
 399 extern int option_two_passes;
 400 extern int option_no_db;
 401 extern int option_file_output;
 402 extern int option_time;
 403 extern struct expression_list *big_expression_stack;
 404 extern struct statement_list *big_statement_stack;
 405 int is_assigned_call(struct expression *expr);
 406 int inlinable(struct expression *expr);
 407 extern int __inline_call;
 408 extern struct expression *__inline_fn;
 409 extern int __in_pre_condition;
 410 extern int __bail_on_rest_of_function;
 411
 412 /* smatch_struct_assignment.c */
 413 struct expression *get_faked_expression(void);
 414 void __fake_struct_member_assignments(struct expression *expr);
 415
 416 /* smatch_project.c */
 417 int is_no_inline_function(const char *function);
 418
 419 /* smatch_conditions */
 420 void __split_whole_condition(struct expression *expr);
 421 void __handle_logic(struct expression *expr);
 422 int is_condition(struct expression *expr);
 423 int __handle_condition_assigns(struct expression *expr);
 424 int __handle_select_assigns(struct expression *expr);
 425 int __handle_expr_statement_assigns(struct expression *expr);
 426
 427 /* smatch_implied.c */
 428 extern int option_debug_implied;
 429 extern int option_debug_related;
 430 extern int option_no_implied;
 431 struct range_list_stack;
 432 struct stree *__implied_case_stree(struct expression *switch_expr,
 433                                  struct expression *case_expr,
 434                                  struct range_list_stack **remaining_cases,
 435                                  struct stree **raw_stree);
 436 struct range_list *__get_implied_values(struct expression *switch_expr);
 437 void overwrite_states_using_pool(struct sm_state *sm);
 438
 439 /* smatch_extras.c */
 440 #define SMATCH_EXTRA 1 /* this is my_id from smatch extra set in smatch.c */
 441
 442 struct data_range {
 443         sval_t min;
 444         sval_t max;
 445 };
 446
 447 extern long long valid_ptr_min, valid_ptr_max;
 448 extern sval_t valid_ptr_min_sval, valid_ptr_max_sval;
 449 static const sval_t array_min_sval = {
 450         .type = &ptr_ctype,
 451         {.value = 100000},
 452 };
 453 static const sval_t array_max_sval = {
 454         .type = &ptr_ctype,
 455         {.value = 200000},
 456 };
 457 #define STRLEN_MAX_RET 1010101
 458
 459 /* smatch_absolute.c */
 460 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 461 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 462
 463 /* smatch_local_values.c */
 464 int get_local_rl(struct expression *expr, struct range_list **rl);
 465 int get_local_max_helper(struct expression *expr, sval_t *sval);
 466 int get_local_min_helper(struct expression *expr, sval_t *sval);
 467
 468 /* smatch_type_value.c */
 469 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 470
 471 /* smatch_states.c */
 472 void __swap_cur_stree(struct stree *stree);
 473 void __push_fake_cur_stree();
 474 struct stree *__pop_fake_cur_stree();
 475 void __free_fake_cur_stree();
 476 void __set_fake_cur_stree_fast(struct stree *stree);
 477 void __pop_fake_cur_stree_fast(void);
 478 void __merge_stree_into_cur(struct stree *stree);
 479
 480 int unreachable(void);
 481 void __set_sm(struct sm_state *sm);
 482 void __set_true_false_sm(struct sm_state *true_state,
 483                         struct sm_state *false_state);
 484 void nullify_path(void);
 485 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 486                                void *unused);
 487 void __unnullify_path(void);
 488 int __path_is_null(void);
 489 void save_all_states(void);
 490 void restore_all_states(void);
 491 void free_goto_stack(void);
 492 void clear_all_states(void);
 493
 494 struct sm_state *get_sm_state(int owner, const char *name,
 495                                 struct symbol *sym);
 496 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 497 void __push_true_states(void);
 498 void __use_false_states(void);
 499 void __discard_false_states(void);
 500 void __merge_false_states(void);
 501 void __merge_true_states(void);
 502
 503 void __negate_cond_stacks(void);
 504 void __use_pre_cond_states(void);
 505 void __use_cond_true_states(void);
 506 void __use_cond_false_states(void);
 507 void __push_cond_stacks(void);
 508 struct stree *__copy_cond_true_states(void);
 509 struct stree *__copy_cond_false_states(void);
 510 struct stree *__pop_cond_true_stack(void);
 511 struct stree *__pop_cond_false_stack(void);
 512 void __and_cond_states(void);
 513 void __or_cond_states(void);
 514 void __save_pre_cond_states(void);
 515 void __discard_pre_cond_states(void);
 516 void __use_cond_states(void);
 517 extern struct state_list *__last_base_slist;
 518
 519 void __warn_on_silly_pre_loops(void);
 520
 521 void __push_continues(void);
 522 void __discard_continues(void);
 523 void __process_continues(void);
 524 void __merge_continues(void);
 525
 526 void __push_breaks(void);
 527 void __process_breaks(void);
 528 int __has_breaks(void);
 529 void __merge_breaks(void);
 530 void __use_breaks(void);
 531
 532 void __save_switch_states(struct expression *switch_expr);
 533 void __discard_switches(void);
 534 void __merge_switches(struct expression *switch_expr, struct expression *case_expr);
 535 void __push_default(void);
 536 void __set_default(void);
 537 int __pop_default(void);
 538
 539 void __push_conditions(void);
 540 void __discard_conditions(void);
 541
 542 void __save_gotos(const char *name);
 543 void __merge_gotos(const char *name);
 544
 545 void __print_cur_stree(void);
 546
 547 /* smatch_hooks.c */
 548 void __pass_to_client(void *data, enum hook_type type);
 549 void __pass_to_client_no_data(enum hook_type type);
 550 void __pass_case_to_client(struct expression *switch_expr,
 551                            struct expression *case_expr);
 552 int __has_merge_function(int client_id);
 553 struct smatch_state *__client_merge_function(int owner,
 554                                              struct smatch_state *s1,
 555                                              struct smatch_state *s2);
 556 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 557 void call_pre_merge_hook(struct sm_state *sm);
 558 void __push_scope_hooks(void);
 559 void __call_scope_hooks(void);
 560
 561 /* smatch_function_hooks.c */
 562 void create_function_hook_hash(void);
 563 void __match_initializer_call(struct symbol *sym);
 564
 565 /* smatch_db.c */
 566 enum info_type {
 567         INTERNAL        = 0,
 568         /*
 569          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 570          * number it can't be re-used right away so there may be gaps.
 571          * We select these in order by type so if the order matters, then give
 572          * it a number below 100-999,9000-9999 ranges. */
 573
 574         PARAM_CLEARED   = 101,
 575         FILTER_VALUE    = 102,
 576
 577         PARAM_VALUE     = 1001,
 578         BUF_SIZE        = 1002,
 579         USER_DATA       = 1003,
 580         CAPPED_DATA     = 1004,
 581         RETURN_VALUE    = 1005,
 582         DEREFERENCE     = 1006,
 583         RANGE_CAP       = 1007,
 584         LOCK_HELD       = 1008,
 585         LOCK_RELEASED   = 1009,
 586         ABSOLUTE_LIMITS = 1010,
 587         LIMITED_VALUE   = 1011,
 588         ADDED_VALUE     = 1012,
 589         PARAM_FREED     = 1013,
 590         DATA_SOURCE     = 1014,
 591         FUZZY_MAX       = 1015,
 592         STR_LEN         = 1016,
 593         ARRAY_LEN       = 1017,
 594         CAPABLE         = 1018,
 595         NS_CAPABLE      = 1019,
 596         TYPE_LINK       = 1022,
 597         UNTRACKED_PARAM = 1023,
 598         CULL_PATH       = 1024,
 599         PARAM_SET       = 1025,
 600
 601         /* put random temporary stuff in the 7000-7999 range for testing */
 602         USER_DATA3      = 8017,
 603         USER_DATA_SET   = 9018,
 604         USER_DATA_LIMITED = 9019,
 605 };
 606
 607 void debug_sql(const char *sql);
 608 void debug_mem_sql(const char *sql);
 609 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 610 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 611 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 612 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));
 613 void select_call_implies_hook(int type, void (*callback)(struct expression *arg, char *key, char *value));
 614 struct range_list *db_return_vals(struct expression *expr);
 615 char *return_state_to_var_sym(struct expression *expr, int param, char *key, struct symbol **sym);
 616 char *get_variable_from_key(struct expression *arg, char *key, struct symbol **sym);
 617 const char *get_param_name(struct sm_state *sm);
 618 char *get_data_info_name(struct expression *expr);
 619
 620 #define run_sql(call_back, data, sql...)    \
 621 do {                                  \
 622         char sql_txt[1024];           \
 623         if (option_no_db)             \
 624                 break;                \
 625         snprintf(sql_txt, 1024, sql); \
 626         debug_sql(sql_txt);           \
 627         sql_exec(call_back, data, sql_txt); \
 628 } while (0)
 629
 630 /* like run_sql() but for the in-memory database */
 631 #define mem_sql(call_back, data, sql...)                                                \
 632 do {                                                                            \
 633         char sql_txt[1024];                                                     \
 634                                                                                 \
 635         snprintf(sql_txt, sizeof(sql_txt), sql);                                \
 636         sm_debug("in-mem: %s\n", sql_txt);                                      \
 637         debug_mem_sql(sql_txt);                                                 \
 638         sql_mem_exec(call_back, data, sql_txt);                                 \
 639 } while (0)
 640
 641 void sql_insert_return_states(int return_id, const char *return_ranges,
 642                 int type, int param, const char *key, const char *value);
 643 void sql_insert_caller_info(struct expression *call, int type, int param,
 644                 const char *key, const char *value);
 645 void sql_insert_function_ptr(const char *fn, const char *struct_name);
 646 void sql_insert_return_values(const char *return_values);
 647 void sql_insert_call_implies(int type, int param, const char *key, const char *value);
 648 void sql_insert_function_type_size(const char *member, const char *ranges);
 649 void sql_insert_local_values(const char *name, const char *value);
 650 void sql_insert_function_type_value(const char *type, const char *value);
 651 void sql_insert_function_type_info(int param, const char *value);
 652 void sql_insert_data_info(struct expression *data, int type, const char *value);
 653
 654 void sql_select_return_states(const char *cols, struct expression *call,
 655         int (*callback)(void*, int, char**, char**), void *info);
 656 void sql_select_caller_info(const char *cols, struct symbol *sym,
 657         int (*callback)(void*, int, char**, char**));
 658 void sql_select_call_implies(const char *cols, struct expression *call,
 659         int (*callback)(void*, int, char**, char**));
 660
 661 void sql_exec(int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 662 void sql_mem_exec(int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 663
 664 void open_smatch_db(void);
 665
 666 /* smatch_files.c */
 667 int open_data_file(const char *filename);
 668 struct token *get_tokens_file(const char *filename);
 669
 670 /* smatch.c */
 671 extern char *option_debug_check;
 672 extern char *option_project_str;
 673 extern char *data_dir;
 674 extern int option_no_data;
 675 extern int option_spammy;
 676 extern int option_full_path;
 677 extern int option_param_mapper;
 678 extern int option_call_tree;
 679 extern int num_checks;
 680
 681 enum project_type {
 682         PROJ_NONE,
 683         PROJ_KERNEL,
 684         PROJ_WINE,
 685 };
 686 extern enum project_type option_project;
 687 const char *check_name(unsigned short id);
 688
 689
 690 /* smatch_buf_size.c */
 691 int get_array_size(struct expression *expr);
 692 int get_array_size_bytes(struct expression *expr);
 693 int get_array_size_bytes_min(struct expression *expr);
 694 int get_array_size_bytes_max(struct expression *expr);
 695 struct range_list *get_array_size_bytes_rl(struct expression *expr);
 696 int get_real_array_size(struct expression *expr);
 697 /* smatch_strlen.c */
 698 int get_implied_strlen(struct expression *expr, struct range_list **rl);
 699 int get_size_from_strlen(struct expression *expr);
 700
 701 /* smatch_capped.c */
 702 int is_capped(struct expression *expr);
 703 int is_capped_var_sym(const char *name, struct symbol *sym);
 704
 705 /* check_user_data.c */
 706 int is_user_macro(struct expression *expr);
 707 int is_user_data(struct expression *expr);
 708 int is_capped_user_data(struct expression *expr);
 709 int implied_user_data(struct expression *expr, struct range_list **rl);
 710 int get_user_rl(struct expression *expr, struct range_list **rl);
 711
 712 /* check_locking.c */
 713 void print_held_locks();
 714
 715 /* check_assigned_expr.c */
 716 struct expression *get_assigned_expr(struct expression *expr);
 717 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
 718
 719 /* smatch_comparison.c */
 720 struct compare_data {
 721         const char *var1;
 722         struct var_sym_list *vsl1;
 723         int comparison;
 724         const char *var2;
 725         struct var_sym_list *vsl2;
 726 };
 727 int get_comparison(struct expression *left, struct expression *right);
 728 int get_comparison_strings(const char *one, const char *two);
 729 int possible_comparison(struct expression *a, int comparison, struct expression *b);
 730 struct state_list *get_all_comparisons(struct expression *expr);
 731 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
 732 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
 733 char *expr_equal_to_param(struct expression *expr, int ignore);
 734 char *expr_lte_to_param(struct expression *expr, int ignore);
 735 char *expr_param_comparison(struct expression *expr, int ignore);
 736 int flip_comparison(int op);
 737 int negate_comparison(int op);
 738 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
 739
 740 /* smatch_sval.c */
 741 sval_t *sval_alloc(sval_t sval);
 742 sval_t *sval_alloc_permanent(sval_t sval);
 743 sval_t sval_blank(struct expression *expr);
 744 sval_t sval_type_val(struct symbol *type, long long val);
 745 sval_t sval_from_val(struct expression *expr, long long val);
 746 int sval_unsigned(sval_t sval);
 747 int sval_signed(sval_t sval);
 748 int sval_bits(sval_t sval);
 749 int sval_positive_bits(sval_t sval);
 750 int sval_bits_used(sval_t sval);
 751 int sval_is_negative(sval_t sval);
 752 int sval_is_positive(sval_t sval);
 753 int sval_is_min(sval_t sval);
 754 int sval_is_max(sval_t sval);
 755 int sval_is_a_min(sval_t sval);
 756 int sval_is_a_max(sval_t sval);
 757 int sval_is_negative_min(sval_t sval);
 758 int sval_cmp(sval_t one, sval_t two);
 759 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
 760 int sval_cmp_val(sval_t one, long long val);
 761 sval_t sval_min(sval_t one, sval_t two);
 762 sval_t sval_max(sval_t one, sval_t two);
 763 int sval_too_low(struct symbol *type, sval_t sval);
 764 int sval_too_high(struct symbol *type, sval_t sval);
 765 int sval_fits(struct symbol *type, sval_t sval);
 766 sval_t sval_cast(struct symbol *type, sval_t sval);
 767 sval_t sval_preop(sval_t sval, int op);
 768 sval_t sval_binop(sval_t left, int op, sval_t right);
 769 int sval_binop_overflows(sval_t left, int op, sval_t right);
 770 const char *sval_to_str(sval_t sval);
 771 const char *sval_to_numstr(sval_t sval);
 772 sval_t ll_to_sval(long long val);
 773
 774 /* smatch_string_list.c */
 775 int list_has_string(struct string_list *str_list, char *str);
 776 void insert_string(struct string_list **str_list, char *str);
 777 struct string_list *clone_str_list(struct string_list *orig);
 778 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
 779
 780 /* smatch_start_states.c */
 781 struct stree *get_start_states(void);
 782
 783 /* smatch_recurse.c */
 784 int has_symbol(struct expression *expr, struct symbol *sym);
 785 int has_variable(struct expression *expr, struct expression *var);
 786 int has_inc_dec(struct expression *expr);
 787
 788 /* smatch_stored_conditions.c */
 789 struct smatch_state *get_stored_condition(struct expression *expr);
 790
 791 /* check_string_len.c */
 792 int get_formatted_string_size(struct expression *call, int arg);
 793
 794 /* smatch_param_set.c */
 795 int param_was_set(struct expression *expr);
 796 /* smatch_param_filter.c */
 797 int param_has_filter_data(struct sm_state *sm);
 798
 799 /* smatch_links.c */
 800 void set_up_link_functions(int id, int linkid);
 801 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
 802
 803 /* smatch_auto_copy.c */
 804 void set_auto_copy(int owner);
 805
 806 /* check_buf_comparison */
 807 struct expression *get_size_variable(struct expression *buf);
 808
 809 /* smatch_untracked_param.c */
 810 void add_untracked_param_hook(void (func)(struct expression *call, int param));
 811
 812 /* smatch_impossible.c */
 813 int is_impossible_path(void);
 814
 815 #endif      /* !SMATCH_H_ */