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 <float.h>
  25 #include <sys/time.h>
  26 #include <sqlite3.h>
  27 #include "lib.h"
  28 #include "allocate.h"
  29 #include "scope.h"
  30 #include "parse.h"
  31 #include "expression.h"
  32 #include "avl.h"
  33 #include "smatch_constants.h"
  34
  35 typedef long long mtag_t;
  36
  37 struct smatch_state {
  38         const char *name;
  39         void *data;
  40 };
  41 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
  42 #define GLOBAL_STATE(_x) struct smatch_state _x = { .name = #_x }
  43 extern struct smatch_state undefined;
  44 extern struct smatch_state merged;
  45 extern struct smatch_state true_state;
  46 extern struct smatch_state false_state;
  47 extern struct smatch_state unit_bit;
  48 extern struct smatch_state unit_byte;
  49 extern struct smatch_state unit_array_size;
  50 extern struct smatch_state unit_long;
  51 extern struct smatch_state unit_page;
  52 extern struct smatch_state unit_msec;
  53 extern struct smatch_state unit_ns;
  54 extern struct smatch_state unit_jiffy;
  55 DECLARE_ALLOCATOR(smatch_state);
  56
  57 static inline void *INT_PTR(int i)
  58 {
  59         return (void *)(long)i;
  60 }
  61
  62 static inline int PTR_INT(void *p)
  63 {
  64         return (int)(long)p;
  65 }
  66
  67 struct tracker {
  68         char *name;
  69         struct symbol *sym;
  70         unsigned short owner;
  71 };
  72 DECLARE_ALLOCATOR(tracker);
  73 DECLARE_PTR_LIST(tracker_list, struct tracker);
  74 DECLARE_PTR_LIST(stree_stack, struct stree);
  75
  76 /* The first 3 struct members must match struct tracker */
  77 struct sm_state {
  78         const char *name;
  79         struct symbol *sym;
  80         unsigned short owner;
  81         unsigned short merged:1;
  82         unsigned short leaf:1;
  83         unsigned int line;
  84         struct smatch_state *state;
  85         struct stree *pool;
  86         struct sm_state *left;
  87         struct sm_state *right;
  88         struct state_list *possible;
  89 };
  90
  91 struct var_sym {
  92         char *var;
  93         struct symbol *sym;
  94 };
  95 DECLARE_ALLOCATOR(var_sym);
  96 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  97
  98 struct constraint {
  99         int op;
 100         int id;
 101 };
 102 DECLARE_PTR_LIST(constraint_list, struct constraint);
 103
 104 struct alloc_info {
 105         const char *fn;
 106         int size_param, nr;
 107 };
 108 extern struct alloc_info *alloc_funcs;
 109
 110 struct bit_info {
 111         unsigned long long set;
 112         unsigned long long possible;
 113 };
 114
 115 enum hook_type {
 116         EXPR_HOOK,
 117         EXPR_HOOK_AFTER,
 118         STMT_HOOK,
 119         STMT_HOOK_AFTER,
 120         SYM_HOOK,
 121         STRING_HOOK,
 122         DECLARATION_HOOK,
 123         DECLARATION_HOOK_AFTER,
 124         ASSIGNMENT_HOOK,
 125         ASSIGNMENT_HOOK_AFTER,
 126         RAW_ASSIGNMENT_HOOK,
 127         GLOBAL_ASSIGNMENT_HOOK,
 128         LOGIC_HOOK,
 129         CONDITION_HOOK,
 130         PRELOOP_HOOK,
 131         POSTLOOP_HOOK,
 132         AFTER_LOOP_NO_BREAKS,
 133         SELECT_HOOK,
 134         WHOLE_CONDITION_HOOK,
 135         FUNCTION_CALL_HOOK_BEFORE,
 136         FUNCTION_CALL_HOOK,
 137         CALL_HOOK_AFTER_INLINE,
 138         FUNCTION_CALL_HOOK_AFTER_DB,
 139         CALL_ASSIGNMENT_HOOK,
 140         MACRO_ASSIGNMENT_HOOK,
 141         BINOP_HOOK,
 142         OP_HOOK,
 143         DEREF_HOOK,  /* DEREF_HOOK is junk.  Better to use add_dereference_hook() */
 144         CASE_HOOK,
 145         ASM_HOOK,
 146         CAST_HOOK,
 147         SIZEOF_HOOK,
 148         BASE_HOOK,
 149         FUNC_DEF_HOOK,
 150         AFTER_DEF_HOOK,
 151         END_FUNC_HOOK,
 152         AFTER_FUNC_HOOK,
 153         RETURN_HOOK,
 154         INLINE_FN_START,
 155         INLINE_FN_END,
 156         END_FILE_HOOK,
 157         NUM_HOOKS,
 158 };
 159
 160 #define TRUE 1
 161 #define FALSE 0
 162
 163 struct range_list;
 164
 165 typedef void (void_fn)(void);
 166 typedef void (expr_func)(struct expression *expr);
 167 typedef void (stmt_func)(struct statement *stmt);
 168 typedef bool (bool_stmt_func)(struct statement *stmt);
 169 typedef void (sym_func)(struct symbol *sym);
 170 typedef void (name_sym_hook)(struct expression *expr, const char *name, struct symbol *sym);
 171 typedef void (sm_hook)(struct sm_state *sm, struct expression *mod_expr);
 172 typedef void (string_hook)(struct expression *expr, const char *str);
 173 DECLARE_PTR_LIST(void_fn_list, void_fn);
 174 DECLARE_PTR_LIST(expr_fn_list, expr_func);
 175 DECLARE_PTR_LIST(stmt_fn_list, stmt_func);
 176 DECLARE_PTR_LIST(bool_stmt_fn_list, bool_stmt_func);
 177 DECLARE_PTR_LIST(sym_fn_list, sym_func);
 178 DECLARE_PTR_LIST(name_sym_fn_list, name_sym_hook);
 179 DECLARE_PTR_LIST(string_hook_list, string_hook);
 180 void call_void_fns(struct void_fn_list *list);
 181 void call_expr_fns(struct expr_fn_list *list, struct expression *expr);
 182 void call_stmt_fns(struct stmt_fn_list *list, struct statement *stmt);
 183 void call_sym_fns(struct sym_fn_list *list, struct symbol *sym);
 184 void call_name_sym_fns(struct name_sym_fn_list *list, struct expression *expr, const char *name, struct symbol *sym);
 185 void call_string_hooks(struct string_hook_list *list, struct expression *expr, const char *str);
 186
 187 void add_dereference_hook(expr_func *fn);
 188
 189 struct allocation_info {
 190         const char *fn_name;
 191         const char *size_str;
 192         struct expression *total_size;
 193         struct expression *nr_elems;
 194         struct expression *elem_size;
 195         long min, max;
 196         bool zeroed;
 197         bool safe;  /* safe from overflows */
 198 };
 199 typedef void (alloc_hook)(struct expression *expr, const char *name, struct symbol *sym, struct allocation_info *info);
 200 void add_allocation_hook(alloc_hook *func);
 201
 202 void add_hook(void *func, enum hook_type type);
 203 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 204 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 205 void add_merge_hook(int client_id, merge_func_t *func);
 206 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 207 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *cur, struct sm_state *other));
 208 typedef void (scope_hook)(void *data);
 209 void add_scope_hook(scope_hook *hook, void *data);
 210 void add_return_string_hook(string_hook *fn);
 211 typedef void (param_key_hook)(struct expression *expr, const char *name, struct symbol *sym, void *data);
 212 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 213 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 214                                 struct expression *assign_expr, void *data);
 215 typedef void (return_implies_hook)(struct expression *call_expr,
 216                                    int param, char *key, char *value);
 217 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 218 void add_function_hook_early(const char *look_for, func_hook *call_back, void *data);
 219 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 220 void add_function_hook_late(const char *look_for, func_hook *call_back, void *info);
 221
 222 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 223                               void *info);
 224 void register_func_hooks_from_file(const char *file,
 225                                    func_hook *call_back, void *info);
 226 void register_assign_hooks_from_file(const char *file,
 227                                      func_hook *call_back, void *info);
 228 void add_implied_return_hook(const char *look_for,
 229                              implied_return_hook *call_back,
 230                              void *info);
 231 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 232                               void *info);
 233 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 234                               void *info);
 235 void return_implies_state(const char *look_for, long long start, long long end,
 236                          implication_hook *call_back, void *info);
 237 void return_implies_state_sval(const char *look_for, sval_t start, sval_t end,
 238                          implication_hook *call_back, void *info);
 239 void return_implies_exact(const char *look_for, sval_t start, sval_t end,
 240                           implication_hook *call_back, void *info);
 241 struct range_list *get_range_implications(const char *fn);
 242 void select_return_states_hook(int type, return_implies_hook *callback);
 243 void select_return_states_before(void (*fn)(void));
 244 void select_return_states_after(void (*fn)(void));
 245 void add_param_key_expr_hook(const char *look_for, expr_func *call_back,
 246                              int param, const char *key, void *info);
 247 void add_function_param_key_hook(const char *look_for, param_key_hook *call_back,
 248                                  int param, const char *key, void *info);
 249 void add_function_param_key_hook_early(const char *look_for, param_key_hook *call_back,
 250                                        int param, const char *key, void *info);
 251 void add_function_param_key_hook_late(const char *look_for, param_key_hook *call_back,
 252                                       int param, const char *key, void *info);
 253 void return_implies_param_key(const char *look_for, sval_t start, sval_t end,
 254                               param_key_hook *call_back,
 255                               int param, const char *key, void *info);
 256 void return_implies_param_key_exact(const char *look_for, sval_t start, sval_t end,
 257                                     param_key_hook *call_back,
 258                                     int param, const char *key, void *info);
 259 void return_implies_param_key_expr(const char *look_for, sval_t start, sval_t end,
 260                               expr_func *call_back,
 261                               int param, const char *key, void *info);
 262 void select_return_param_key(int type, param_key_hook *callback);
 263 bool get_implied_return(struct expression *expr, struct range_list **rl);
 264 void allocate_hook_memory(void);
 265 void allocate_tracker_array(int num_checks);
 266
 267 struct modification_data {
 268         struct smatch_state *prev;
 269         struct expression *cur;
 270 };
 271
 272 void allocate_modification_hooks(void);
 273 bool is_sub_member(const char *name, struct symbol *sym, struct sm_state *sm);
 274 void add_all_modifications_hook(int owner, name_sym_hook *hook);
 275 void add_modification_hook(int owner, sm_hook *call_back);
 276 void add_modification_hook_late(int owner, sm_hook *call_back);
 277 struct smatch_state *get_modification_state(struct expression *expr);
 278
 279 int outside_of_function(void);
 280 const char *get_filename(void);
 281 extern int base_file_stream;
 282 const char *get_base_file(void);
 283 unsigned long long get_file_id(void);
 284 unsigned long long get_base_file_id(void);
 285 char *get_function(void);
 286 extern int __smatch_lineno;
 287 int get_lineno(void);
 288 extern int final_pass;
 289 extern struct symbol *cur_func_sym;
 290 extern int option_debug;
 291 extern int local_debug;
 292 extern int debug_db;
 293 extern bool implied_debug;
 294 bool debug_implied(void);
 295 bool debug_on(const char *check_name, const char *var);
 296 extern int option_info;
 297 extern int option_spammy;
 298 extern int option_pedantic;
 299 extern int option_print_names;
 300 extern char *trace_variable;
 301 extern struct stree *global_states;
 302 void set_function_skipped(void);
 303 int is_skipped_function(void);
 304 int is_silenced_function(void);
 305 extern bool implications_off;
 306
 307 /* smatch_impossible.c */
 308 int is_impossible_path(void);
 309 void set_true_path_impossible(void);
 310 void set_false_path_impossible(void);
 311 void set_path_impossible(void);
 312
 313 extern FILE *sm_outfd;
 314 extern FILE *sql_outfd;
 315 extern FILE *caller_info_fd;
 316 extern int sm_nr_checks;
 317 extern int sm_nr_errors;
 318
 319 /*
 320  * How to use these routines:
 321  *
 322  * sm_fatal(): an internal error of some kind that should immediately exit
 323  * sm_ierror(): an internal error
 324  * sm_perror(): an internal error from parsing input source
 325  * sm_error(): an error from input source
 326  * sm_warning(): a warning from input source
 327  * sm_info(): info message (from option_info)
 328  * sm_debug(): debug message
 329  * sm_msg(): other message (please avoid using this)
 330  */
 331
 332 #define sm_printf(msg...) do {                                          \
 333         if (final_pass || option_debug || local_debug || debug_db)      \
 334                 fprintf(sm_outfd, msg);                                 \
 335 } while (0)
 336
 337 static inline void sm_prefix(void)
 338 {
 339         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 340         if (option_info || !option_print_names)
 341                 return;
 342         sm_printf("[smatch.%s] ", __CHECKNAME__);
 343 }
 344
 345 static inline void print_implied_debug_msg();
 346
 347 extern bool __silence_warnings_for_stmt;
 348
 349 #define sm_print_msg(type, msg...) \
 350 do {                                                           \
 351         print_implied_debug_msg();                             \
 352         if (!final_pass && !option_debug && !local_debug && !debug_db)    \
 353                 break;                                         \
 354         if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
 355                 break;                                         \
 356         if (!option_info && is_silenced_function())            \
 357                 break;                                         \
 358         sm_prefix();                                           \
 359         if (type == 1) {                                       \
 360                 sm_printf("warn: ");                           \
 361                 sm_nr_checks++;                                \
 362         } else if (type == 2) {                                \
 363                 sm_printf("error: ");                          \
 364                 sm_nr_checks++;                                \
 365         } else if (type == 3) {                                \
 366                 sm_printf("parse error: ");                    \
 367                 sm_nr_errors++;                                \
 368         } else if (type == 4) {                                \
 369                 sm_printf("pedantic: ");                       \
 370         }                                                      \
 371         sm_printf(msg);                                        \
 372         sm_printf("\n");                                       \
 373 } while (0)
 374
 375 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
 376
 377 extern char *implied_debug_msg;
 378 static inline void print_implied_debug_msg(void)
 379 {
 380         static struct symbol *last_printed = NULL;
 381
 382         if (!implied_debug_msg)
 383                 return;
 384         if (last_printed == cur_func_sym)
 385                 return;
 386         last_printed = cur_func_sym;
 387         sm_msg("%s", implied_debug_msg);
 388 }
 389
 390 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 391 #define db_debug(msg...) do { if (option_debug || debug_db) sm_printf(msg); } while (0)
 392
 393 #define sm_info(msg...) do {                                    \
 394         if (option_debug || (option_info && final_pass)) {      \
 395                 sm_prefix();                                    \
 396                 sm_printf("info: ");                            \
 397                 sm_printf(msg);                                 \
 398                 sm_printf("\n");                                \
 399         }                                                       \
 400 } while(0)
 401
 402 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
 403 #define sm_warning_line(line, msg...) do {      \
 404         int __orig = __smatch_lineno;           \
 405         __smatch_lineno = line;                 \
 406         sm_print_msg(1, msg);                   \
 407         __smatch_lineno = __orig;               \
 408 } while (0)
 409 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
 410 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
 411 #define sm_pedantic(msg...) do { if (option_pedantic) sm_print_msg(4, msg); } while (0)
 412
 413 static inline void sm_fatal(const char *fmt, ...)
 414 {
 415         va_list args;
 416
 417         va_start(args, fmt);
 418         vfprintf(sm_outfd, fmt, args);
 419         va_end(args);
 420
 421         fprintf(sm_outfd, "\n");
 422
 423         exit(1);
 424 }
 425
 426 static inline void sm_ierror(const char *fmt, ...)
 427 {
 428         va_list args;
 429
 430         sm_nr_errors++;
 431
 432         fprintf(sm_outfd, "internal error: ");
 433
 434         va_start(args, fmt);
 435         vfprintf(sm_outfd, fmt, args);
 436         va_end(args);
 437
 438         fprintf(sm_outfd, "\n");
 439 }
 440 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
 441
 442 bool has_states(struct stree *stree, int owner);
 443 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym);
 444 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 445 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 446 bool has_possible_state(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 447 bool expr_has_possible_state(int owner, struct expression *expr, struct smatch_state *state);
 448 struct state_list *get_possible_states(int owner, const char *name,
 449                                        struct symbol *sym);
 450 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 451 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 452                struct smatch_state *state);
 453 struct sm_state *set_state_expr(int owner, struct expression *expr,
 454                 struct smatch_state *state);
 455 void preserve_out_of_scope(int owner);
 456 void __delete_state(int owner, const char *name, struct symbol *sym);
 457 void __delete_all_states_sym(struct symbol *sym);
 458 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 459                            struct smatch_state *true_state,
 460                            struct smatch_state *false_state);
 461 void set_true_false_states_expr(int owner, struct expression *expr,
 462                            struct smatch_state *true_state,
 463                            struct smatch_state *false_state);
 464
 465 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 466 struct stree *get_all_states_stree(int id);
 467 struct stree *__get_cur_stree(void);
 468 int is_reachable(void);
 469 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
 470
 471 static inline void set_undefined(struct sm_state *sm, struct expression *mod_expr)
 472 {
 473         set_state(sm->owner, sm->name, sm->sym, &undefined);
 474 }
 475
 476 /* smatch_ssa.c */
 477 char *ssa_name(const char *name);
 478 void set_ssa_state(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 479 void update_ssa_state(int owner, const char *name, struct symbol *sym,
 480                       struct smatch_state *state);
 481 void update_ssa_sm(int owner, struct sm_state *sm, struct smatch_state *state);
 482 void set_ssa_state_expr(int owner, struct expression *expr, struct smatch_state *state);
 483 struct sm_state *get_ssa_sm_state(int owner, const char *name, struct symbol *sym);
 484 struct sm_state *get_ssa_sm_state_expr(int owner, struct expression *expr);
 485 struct smatch_state *get_ssa_state(int owner, const char *name, struct symbol *sym);
 486 struct smatch_state *get_ssa_state_expr(int owner, struct expression *expr);
 487
 488 /* smatch_helper.c */
 489 DECLARE_PTR_LIST(int_stack, int);
 490 char *alloc_string(const char *str);
 491 char *alloc_string_newline(const char *str);
 492 void free_string(char *str);
 493 void remove_parens(char *str);
 494 struct smatch_state *alloc_state_num(int num);
 495 struct smatch_state *alloc_state_str(const char *name);
 496 struct smatch_state *merge_str_state(struct smatch_state *s1, struct smatch_state *s2);
 497 struct smatch_state *alloc_state_expr(struct expression *expr);
 498 struct expression *get_assigned_call(struct expression *expr);
 499 struct expression *get_argument_from_call_expr(struct expression_list *args,
 500                                                int num);
 501 struct expression *get_array_expr(struct expression *expr);
 502
 503 char *expr_to_var(struct expression *expr);
 504 struct symbol *expr_to_sym(struct expression *expr);
 505 char *expr_to_str(struct expression *expr);
 506 char *expr_to_str_sym(struct expression *expr,
 507                                      struct symbol **sym_ptr);
 508 char *expr_to_var_sym(struct expression *expr,
 509                              struct symbol **sym_ptr);
 510 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
 511 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
 512 int get_complication_score(struct expression *expr);
 513
 514 int sym_name_is(const char *name, struct expression *expr);
 515 int get_const_value(struct expression *expr, sval_t *sval);
 516 int get_value(struct expression *expr, sval_t *val);
 517 int get_implied_value(struct expression *expr, sval_t *val);
 518 int get_implied_value_fast(struct expression *expr, sval_t *sval);
 519 int get_implied_min(struct expression *expr, sval_t *sval);
 520 int get_implied_max(struct expression *expr, sval_t *val);
 521 int get_hard_max(struct expression *expr, sval_t *sval);
 522 int get_fuzzy_min(struct expression *expr, sval_t *min);
 523 int get_fuzzy_max(struct expression *expr, sval_t *max);
 524 int get_absolute_min(struct expression *expr, sval_t *sval);
 525 int get_absolute_max(struct expression *expr, sval_t *sval);
 526 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 527 int parse_call_math_rl(struct expression *call, const char *math, struct range_list **rl);
 528 const char *get_allocation_math(struct expression *expr);
 529 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 530 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 531 int expr_is_zero(struct expression *expr);
 532 int known_condition_true(struct expression *expr);
 533 int known_condition_false(struct expression *expr);
 534 int implied_condition_true(struct expression *expr);
 535 int implied_condition_false(struct expression *expr);
 536 int can_integer_overflow(struct symbol *type, struct expression *expr);
 537 void clear_math_cache(void);
 538 void clear_strip_cache(void);
 539 void set_fast_math_only(void);
 540 void clear_fast_math_only(void);
 541
 542 int is_array(struct expression *expr);
 543 struct expression *get_array_base(struct expression *expr);
 544 struct expression *get_array_offset(struct expression *expr);
 545 const char *show_state(struct smatch_state *state);
 546 struct statement *get_expression_statement(struct expression *expr);
 547 struct expression *strip__builtin_choose_expr(struct expression *expr);
 548 struct expression *strip_Generic(struct expression *expr);
 549 struct expression *strip_parens(struct expression *expr);
 550 struct expression *strip_expr(struct expression *expr);
 551 struct expression *strip_no_cast(struct expression *expr);
 552 struct expression *strip_expr_cast(struct expression *expr, struct expression **cast);
 553 struct expression *strip_expr_set_parent(struct expression *expr);
 554 int is_error_return(struct expression *expr);
 555 int getting_address(struct expression *expr);
 556 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
 557 char *get_member_name(struct expression *expr);
 558 char *get_fnptr_name(struct expression *expr);
 559 int cmp_pos(struct position pos1, struct position pos2);
 560 int positions_eq(struct position pos1, struct position pos2);
 561 struct statement *get_current_statement(void);
 562 struct statement *get_prev_statement(void);
 563 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
 564
 565 enum { RET_SUCCESS, RET_FAIL, RET_UNKNOWN };
 566 int success_fail_return(struct range_list *rl);
 567
 568 #define RETURN_VAR    -1
 569 #define LOCAL_SCOPE   -2
 570 #define FILE_SCOPE    -3
 571 #define GLOBAL_SCOPE  -4
 572 #define UNKNOWN_SCOPE -5
 573
 574 char *swap_names(const char *orig, const char *remove, const char *add);
 575 char *get_param_var_sym_var_sym(const char *name, struct symbol *sym, struct expression *ret_expr, struct symbol **sym_p);
 576 char *get_param_name_sym(struct expression *expr, struct symbol **sym_p);
 577 int get_return_param_key_from_var_sym(const char *name, struct symbol *sym,
 578                                       struct expression *ret_expr,
 579                                       const char **key);
 580 int get_param_key_from_var_sym(const char *name, struct symbol *sym,
 581                                struct expression *ret_expr,
 582                                const char **key);
 583 int get_param_key_from_sm(struct sm_state *sm, struct expression *ret_expr,
 584                           const char **key);
 585 int get_param_key_from_expr(struct expression *expr, struct expression *ret_expr,
 586                             const char **key);
 587 const char *get_param_key_swap_dollar(struct expression *expr);
 588 int map_to_param(const char *name, struct symbol *sym);
 589 int get_param_num_from_sym(struct symbol *sym);
 590 int get_param_num(struct expression *expr);
 591 struct symbol *get_param_sym_from_num(int num);
 592 struct expression *map_container_of_to_simpler_expr_key(struct expression *expr, const char *orig_key, char **new_key);
 593 const char *get_container_of_str(struct expression *expr);
 594 bool get_offset_param(const char *ret_str, int *offset, int *param);
 595 /* smatch_points_to_container.c */
 596 struct expression *get_stored_container(struct expression *expr, int offset);
 597
 598 int ms_since(struct timeval *start);
 599 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 600 int parent_is_gone(struct expression *expr);
 601 bool is_noderef_ptr(struct expression *expr);
 602 int invert_op(int op);
 603 int op_remove_assign(int op);
 604 int expr_equiv(struct expression *one, struct expression *two);
 605 void push_int(struct int_stack **stack, int num);
 606 int pop_int(struct int_stack **stack);
 607 bool macro_to_ul(const char *macro, unsigned long *val);
 608 bool has_cleanup(struct expression *expr);
 609
 610 /* smatch_type.c */
 611 struct symbol *get_real_base_type(struct symbol *sym);
 612 int type_bytes(struct symbol *type);
 613 int array_bytes(struct symbol *type);
 614 struct symbol *get_pointer_type(struct expression *expr);
 615 struct symbol *get_type(struct expression *expr);
 616 struct symbol *get_comparison_type(struct expression *expr);
 617 struct symbol *get_final_type(struct expression *expr);
 618 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
 619 int type_signed(struct symbol *base_type);
 620 int expr_unsigned(struct expression *expr);
 621 int expr_signed(struct expression *expr);
 622 int returns_unsigned(struct symbol *base_type);
 623 int is_pointer(struct expression *expr);
 624 bool is_void_ptr(struct symbol *type);
 625 int returns_pointer(struct symbol *base_type);
 626 sval_t sval_type_max(struct symbol *base_type);
 627 sval_t sval_type_min(struct symbol *base_type);
 628 int nr_bits(struct expression *expr);
 629 int is_void_pointer(struct expression *expr);
 630 int is_char_pointer(struct expression *expr);
 631 int is_string(struct expression *expr);
 632 bool is_struct_ptr(struct symbol *type);
 633 int is_static(struct expression *expr);
 634 bool is_local_variable(struct expression *expr);
 635 int types_equiv(struct symbol *one, struct symbol *two);
 636 bool type_fits(struct symbol *type, struct symbol *test);
 637 int fn_static(void);
 638 const char *global_static();
 639 struct symbol *cur_func_return_type(void);
 640 struct symbol *get_arg_type(struct expression *fn, int arg);
 641 struct symbol *get_member_type_from_key(struct expression *expr, const char *key);
 642 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key);
 643 int is_struct(struct expression *expr);
 644 char *type_to_str(struct symbol *type);
 645
 646 /* smatch_ignore.c */
 647 void add_ignore(int owner, const char *name, struct symbol *sym);
 648 int is_ignored(int owner, const char *name, struct symbol *sym);
 649 void add_ignore_expr(int owner, struct expression *expr);
 650 int is_ignored_expr(int owner, struct expression *expr);
 651
 652 /* smatch_var_sym */
 653 struct smatch_state *alloc_var_sym_state(const char *var, struct symbol *sym);
 654 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 655 struct var_sym_list *expr_to_vsl(struct expression *expr);
 656 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 657 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 658 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 659 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 660 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 661 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 662 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 663 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two);
 664 void free_var_sym_list(struct var_sym_list **list);
 665 void free_var_syms_and_list(struct var_sym_list **list);
 666
 667 /* smatch_tracker */
 668 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 669 void add_tracker(struct tracker_list **list, int owner, const char *name,
 670                 struct symbol *sym);
 671 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 672 void del_tracker(struct tracker_list **list, int owner, const char *name,
 673                 struct symbol *sym);
 674 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 675                 struct symbol *sym);
 676 void free_tracker_list(struct tracker_list **list);
 677 void free_trackers_and_list(struct tracker_list **list);
 678
 679 /* smatch_conditions */
 680 int in_condition(void);
 681
 682 /* smatch_flow.c */
 683
 684 extern int __in_fake_assign;
 685 extern int __in_fake_parameter_assign;
 686 extern int __in_fake_struct_assign;
 687 extern int __in_buf_clear;
 688 extern int __in_fake_var_assign;
 689 extern int __in_builtin_overflow_func;
 690 extern int __fake_state_cnt;
 691 extern int __debug_skip;
 692 extern int in_fake_env;
 693 bool is_fake_var_assign(struct expression *expr);
 694 void smatch (struct string_list *filelist);
 695 int inside_loop(void);
 696 int definitely_inside_loop(void);
 697 void add_once_through_hook(bool_stmt_func *fn);
 698 struct expression *get_switch_expr(void);
 699 int in_expression_statement(void);
 700 void __process_post_op_stack(void);
 701 void parse_assignment(struct expression *expr, bool shallow);
 702 void __split_expr(struct expression *expr);
 703 void __split_label_stmt(struct statement *stmt);
 704 void __split_stmt(struct statement *stmt);
 705 extern int __in_function_def;
 706 extern int __in_unmatched_hook;
 707 extern int option_assume_loops;
 708 extern int option_two_passes;
 709 extern int option_no_db;
 710 extern int option_file_output;
 711 extern int option_time;
 712 extern int option_time_stmt;
 713 extern struct expression_list *big_expression_stack;
 714 extern struct expression_list *big_condition_stack;
 715 extern struct statement_list *big_statement_stack;
 716 int is_condition_call(struct expression *expr);
 717 int is_assigned_call(struct expression *expr);
 718 int is_fake_assigned_call(struct expression *expr);
 719 void add_function_data(unsigned long *fn_data);
 720 int inlinable(struct expression *expr);
 721 extern int __inline_call;
 722 extern struct expression *__inline_fn;
 723 extern int __in_pre_condition;
 724 extern int __bail_on_rest_of_function;
 725 extern struct statement *__prev_stmt;
 726 extern struct statement *__cur_stmt;
 727 extern struct statement *__next_stmt;
 728 void init_fake_env(void);
 729 void end_fake_env(void);
 730 int time_parsing_function(void);
 731 bool taking_too_long(void);
 732 struct statement *get_last_stmt(void);
 733 int is_last_stmt(struct statement *cur_stmt);
 734
 735 /* smatch_struct_assignment.c */
 736 struct expression *get_faked_expression(void);
 737 void __fake_struct_member_assignments(struct expression *expr);
 738 void create_recursive_fake_assignments(struct expression *expr,
 739                 void (*assign_handler)(struct expression *expr, void *data),
 740                 void *data);
 741
 742 /* smatch_project.c */
 743 int is_no_inline_function(const char *function);
 744
 745 /* smatch_conditions */
 746 void __set_confidence_implied(void);
 747 void __unset_confidence();
 748 void __split_whole_condition_tf(struct expression *expr, int *known_tf);
 749 void __split_whole_condition(struct expression *expr);
 750 void __handle_logic(struct expression *expr);
 751 int is_condition(struct expression *expr);
 752 int __handle_condition_assigns(struct expression *expr);
 753 int __handle_select_assigns(struct expression *expr);
 754 int __handle_expr_statement_assigns(struct expression *expr);
 755
 756 /* smatch_implied.c */
 757 struct range_list_stack;
 758 void turn_off_implications(int id);
 759 void param_limit_implications(struct expression *expr, int param, char *key, char *value, struct stree **implied);
 760 struct stree *__implied_case_stree(struct expression *switch_expr,
 761                                    struct range_list *case_rl,
 762                                    struct range_list_stack **remaining_cases,
 763                                    struct stree **raw_stree);
 764 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
 765 int assume(struct expression *expr);
 766 void end_assume(void);
 767 int impossible_assumption(struct expression *left, int op, sval_t sval);
 768
 769 /* smatch_slist.h */
 770 bool has_dynamic_states(unsigned short owner);
 771 void set_dynamic_states(unsigned short owner);
 772
 773 /* smatch_extras.c */
 774 int in_warn_on_macro(void);
 775 extern int SMATCH_EXTRA;
 776 extern int RETURN_ID;
 777
 778 struct data_range {
 779         sval_t min;
 780         sval_t max;
 781 };
 782
 783 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 784 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 785 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym, bool use_stack);
 786
 787 #define STRLEN_MAX_RET 1010101
 788
 789 /* smatch_absolute.c */
 790 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 791 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 792
 793 /* smatch_type_value.c */
 794 void disable_type_val_lookups(void);
 795 void enable_type_val_lookups(void);
 796 void clear_type_value_cache(void);
 797 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 798
 799 /* smatch_data_val.c */
 800 int get_mtag_rl(struct expression *expr, struct range_list **rl);
 801 /* smatch_array_values.c */
 802 void clear_array_values_cache(void);
 803 int get_array_rl(struct expression *expr, struct range_list **rl);
 804
 805 /* smatch_states.c */
 806 struct stree *__swap_cur_stree(struct stree *stree);
 807 void __push_fake_cur_stree();
 808 struct stree *__pop_fake_cur_stree();
 809 void __free_fake_cur_stree();
 810 void __set_fake_cur_stree_fast(struct stree *stree);
 811 void __pop_fake_cur_stree_fast(void);
 812 void __merge_stree_into_cur(struct stree *stree);
 813
 814 int unreachable(void);
 815 void __set_cur_stree_readonly(void);
 816 void __set_cur_stree_writable(void);
 817 void __set_sm(struct sm_state *sm);
 818 void __set_sm_cur_stree(struct sm_state *sm);
 819 void __set_true_false_sm(struct sm_state *true_state,
 820                         struct sm_state *false_state);
 821 void nullify_path(void);
 822 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 823                                void *unused);
 824 void __unnullify_path(void);
 825 int __path_is_null(void);
 826 void save_all_states(void);
 827 void restore_all_states(void);
 828 void free_goto_stack(void);
 829 void clear_all_states(void);
 830
 831 struct sm_state *get_sm_state(int owner, const char *name,
 832                                 struct symbol *sym);
 833 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 834 void __push_true_states(void);
 835 void __use_false_states(void);
 836 void __discard_false_states(void);
 837 void __merge_false_states(void);
 838 void __merge_true_states(void);
 839
 840 void __negate_cond_stacks(void);
 841 void __use_pre_cond_states(void);
 842 void __use_cond_true_states(void);
 843 void __use_cond_false_states(void);
 844 void __push_cond_stacks(void);
 845 void __fold_in_set_states(void);
 846 void __free_set_states(void);
 847 struct stree *__copy_cond_true_states(void);
 848 struct stree *__copy_cond_false_states(void);
 849 struct stree *__pop_cond_true_stack(void);
 850 struct stree *__pop_cond_false_stack(void);
 851 void __and_cond_states(void);
 852 void __or_cond_states(void);
 853 void __save_pre_cond_states(void);
 854 void __discard_pre_cond_states(void);
 855 struct stree *__get_true_states(void);
 856 struct stree *__get_false_states(void);
 857 void __use_cond_states(void);
 858 extern struct state_list *__last_base_slist;
 859
 860 void __push_continues(void);
 861 void __discard_continues(void);
 862 void __process_continues(void);
 863 void __merge_continues(void);
 864
 865 void __push_breaks(void);
 866 void __process_breaks(void);
 867 int __has_breaks(void);
 868 void __merge_breaks(void);
 869 void __use_breaks(void);
 870
 871 void __save_switch_states(struct expression *switch_expr);
 872 void __discard_switches(void);
 873 int have_remaining_cases(void);
 874 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl);
 875 void __push_default(void);
 876 void __set_default(void);
 877 bool __has_default_case(void);
 878 int __pop_default(void);
 879
 880 void __push_conditions(void);
 881 void __discard_conditions(void);
 882
 883 void __save_gotos(const char *name, struct symbol *sym);
 884 void __merge_gotos(const char *name, struct symbol *sym);
 885
 886 void __discard_fake_states(struct expression *call);
 887
 888 void __print_cur_stree(void);
 889 bool __print_states(const char *owner);
 890 typedef void (check_tracker_hook)(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 891 void add_check_tracker(const char *check_name, check_tracker_hook *fn);
 892
 893 /* smatch_hooks.c */
 894 void __pass_to_client(void *data, enum hook_type type);
 895 void __pass_case_to_client(struct expression *switch_expr,
 896                            struct range_list *rl);
 897 int __has_merge_function(int client_id);
 898 struct smatch_state *__client_merge_function(int owner,
 899                                              struct smatch_state *s1,
 900                                              struct smatch_state *s2);
 901 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 902 void call_pre_merge_hook(struct sm_state *cur, struct sm_state *other);
 903 void __push_scope_hooks(void);
 904 void __call_scope_hooks(void);
 905 void __free_scope_hooks(void);
 906 void __call_all_scope_hooks(void);
 907 void add_array_initialized_hook(void (*hook)(struct expression *array, int nr));
 908 void __call_array_initialized_hooks(struct expression *array, int nr);
 909
 910 /* smatch_function_hooks.c */
 911 void add_fake_call_after_return(struct expression *call);
 912 void create_function_hook_hash(void);
 913 void __match_initializer_call(struct symbol *sym);
 914
 915 struct expression *get_unfaked_call(void);
 916 void fake_param_assign_helper(struct expression *call, struct expression *fake_assign, bool shallow);
 917
 918 /* smatch_db.c */
 919 enum info_type {
 920         INTERNAL        = 0,
 921         /*
 922          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 923          * number it can't be re-used right away so there may be gaps.
 924          * We select these in order by type so if the order matters, then give
 925          * it a number below 100-999,9000-9999 ranges. */
 926
 927         PARAM_LIMIT     = 103,
 928         PARAM_FILTER    = 104,
 929
 930         RELEASE         = 500,
 931         BUF_CLEARED     = 501,
 932         BUF_ADD         = 502,
 933
 934         PARAM_VALUE     = 1001,
 935         BUF_SIZE        = 1002,
 936         CAPPED_DATA     = 1004,
 937         RETURN_VALUE    = 1005,
 938         DEREFERENCE     = 1006,
 939         RANGE_CAP       = 1007,
 940         ABSOLUTE_LIMITS = 1010,
 941         PARAM_ADD       = 1012,
 942         PARAM_FREED     = 1013,
 943         MAYBE_FREED     = 2014,
 944         DATA_SOURCE     = 1014,
 945         FUZZY_MAX       = 1015,
 946         HARD_MAX        = 2015,
 947         STR_LEN         = 1016,
 948         ARRAY_LEN       = 1017,
 949         CAPABLE         = 1018,
 950         NS_CAPABLE      = 1019,
 951         CONTAINER       = 1020,
 952         CASTED_CALL     = 1021,
 953         TYPE_LINK       = 1022,
 954         UNTRACKED_PARAM = 1023,
 955         LOST_PARAM      = 2023,
 956         CULL_PATH       = 1024,
 957         PARAM_SET       = 1025,
 958         PARAM_USED      = 1026,
 959         BYTE_UNITS      = 1027,
 960         COMPARE_LIMIT   = 1028,
 961         PARAM_COMPARE   = 1029,
 962         CONSTRAINT      = 1031,
 963         PASSES_TYPE     = 1032,
 964         CONSTRAINT_REQUIRED = 1033,
 965         BIT_INFO        = 1034,
 966         NOSPEC          = 1035,
 967         NOSPEC_WB       = 1036,
 968         STMT_CNT        = 1037,
 969         TERMINATED      = 1038,
 970         SLEEP           = 1039,
 971         FRESH_ALLOC     = 1044,
 972         ALLOCATOR       = 1045,
 973         FUNC_TIME       = 1047,
 974         POWER_OF_TWO    = 1048,
 975         POWER_OF_TWO_SET = 1049,
 976         BIT_SET         = 1051,
 977         BIT_CLEAR       = 1052,
 978         BIT_IS_SET      = 1053,
 979         BIT_IS_CLEAR    = 1054,
 980
 981         NEGATIVE_ERROR  = 1057,
 982         ERR_PTR         = 1060,
 983         PREEMPT_ADD     = 2054,
 984         PREEMPT_SUB     = 2055,
 985         FD_INSTALL      = 2058,
 986         FGET            = 3059,
 987         IRQ_CONTEXT     = 2062,
 988         TASK_RUNNING    = 2063,
 989         TASK_NOT_RUNNING = 2064,
 990         /* put random temporary stuff in the 7000-7999 range for testing */
 991         HOST_DATA       = 7016,
 992         HOST_DATA_SET   = 7017,
 993         HOST_PTR        = 7018,
 994         HOST_PTR_SET    = 7019,
 995         USER_DATA       = 8017,
 996         USER_DATA_SET   = 9017,
 997         USER_PTR        = 9018,
 998         USER_PTR_SET    = 9019,
 999         NO_OVERFLOW     = 8018,
1000         NO_OVERFLOW_SIMPLE = 8019,
1001         LOCK            = 8020,
1002         UNLOCK          = 8021,
1003         HALF_LOCKED     = 9022,
1004         RESTORE         = 9023,
1005         KNOWN_LOCKED    = 9024,
1006         KNOWN_UNLOCKED  = 9025,
1007         IGNORE_LOCK     = 9026,
1008         SET_FS          = 8022,
1009         ATOMIC_INC      = 8023,
1010         ATOMIC_DEC      = 8024,
1011         REFCOUNT_INIT   = 9025,
1012         REFCOUNT_INC    = 9027,
1013         REFCOUNT_DEC    = 9028,
1014         NO_SIDE_EFFECT  = 8025,
1015         FN_ARG_LINK     = 8028,
1016         DATA_VALUE      = 8029,
1017         ARRAYSIZE_ARG   = 8033,
1018         SIZEOF_ARG      = 8034,
1019         MEMORY_TAG      = 8036,
1020         MTAG_ASSIGN     = 8035,
1021         UNITS           = 8040,
1022         STRING_VALUE    = 8041,
1023         ALLOC           = 8045,
1024
1025         BYTE_COUNT      = 8050,
1026         ELEM_COUNT      = 8051,
1027         ELEM_LAST       = 8052,
1028         USED_LAST       = 8053,
1029         USED_COUNT      = 8054,
1030
1031         /* Do not use numbers above 100k */
1032 };
1033
1034 extern struct sqlite3 *smatch_db;
1035 extern struct sqlite3 *mem_db;
1036 extern struct sqlite3 *cache_db;
1037
1038 bool db_incomplete(void);
1039 void db_ignore_states(int id);
1040 typedef bool (delete_hook)(struct expression *expr);
1041 void add_delete_return_hook(delete_hook *hook);
1042 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
1043 void select_caller_name_sym(void (*fn)(const char *name, struct symbol *sym, char *value), int type);
1044 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
1045 void add_caller_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
1046 void add_return_info_callback(int owner,
1047                               void (*callback)(int return_id, char *return_ranges,
1048                                                struct expression *returned_expr,
1049                                                int param,
1050                                                const char *printed_name,
1051                                                struct sm_state *sm));
1052 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
1053 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));
1054 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
1055 void select_return_implies_hook_early(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
1056 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
1057 struct range_list *db_return_vals(struct expression *expr);
1058 struct range_list *db_return_vals_from_str(const char *fn_name);
1059 struct range_list *db_return_vals_no_args(struct expression *expr);
1060 bool split_param_key(const char *value, int *param, char *key, int len);
1061 bool get_implied_rl_from_call_str(struct expression *expr, const char *data, struct range_list **rl);
1062 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
1063 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
1064 struct expression *get_function_param(struct expression *expr, int param);
1065 char *get_name_sym_from_param_key(struct expression *expr, int param, const char *key, struct symbol **sym);
1066 char *get_param_name_var_sym(const char *name, struct symbol *sym);
1067 char *get_param_name(struct sm_state *sm);
1068 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
1069 const char *get_mtag_name_expr(struct expression *expr);
1070 char *get_data_info_name(struct expression *expr);
1071 char *sm_to_arg_name(struct expression *expr, struct sm_state *sm);
1072 int is_recursive_member(const char *param_name);
1073
1074 char *escape_newlines(const char *str);
1075 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
1076
1077 #define sql_helper(db, call_back, data, sql...)                                 \
1078 do {                                                                            \
1079         char sql_txt[1024];                                                     \
1080                                                                                 \
1081         sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql);                        \
1082         db_debug("debug: %s\n", sql_txt);                                       \
1083         sql_exec(db, call_back, data, sql_txt);                                 \
1084 } while (0)
1085
1086
1087 #define run_sql(call_back, data, sql...)                                        \
1088 do {                                                                            \
1089         if (option_no_db)                                                       \
1090                 break;                                                          \
1091         sql_helper(smatch_db, call_back, data, sql);                            \
1092 } while (0)
1093
1094 #define mem_sql(call_back, data, sql...)                                        \
1095         sql_helper(mem_db, call_back, data, sql)
1096
1097 #define cache_sql(call_back, data, sql...)                                      \
1098         sql_helper(cache_db, call_back, data, sql)
1099
1100 #define sql_insert_helper(table, db, ignore, late, values...)                   \
1101 do {                                                                            \
1102         struct sqlite3 *_db = db;                                               \
1103                                                                                 \
1104         if (__inline_fn && !_db)                                                \
1105                 _db = mem_db;                                                   \
1106         if (_db) {                                                              \
1107                 char buf[1024];                                                 \
1108                 char *err, *p = buf;                                            \
1109                 int rc;                                                         \
1110                                                                                 \
1111                 p += snprintf(p, buf + sizeof(buf) - p,                         \
1112                               "insert %sinto %s values (",                      \
1113                               ignore ? "or ignore " : "", #table);              \
1114                 p += snprintf(p, buf + sizeof(buf) - p, values);                \
1115                 p += snprintf(p, buf + sizeof(buf) - p, ");");                  \
1116                 db_debug("mem-db: %s\n", buf);                                  \
1117                 rc = sqlite3_exec(_db, buf, NULL, NULL, &err);                  \
1118                 if (rc != SQLITE_OK) {                                          \
1119                         sm_ierror("SQL error #2: %s", err);                     \
1120                         sm_ierror("SQL: '%s'", buf);                            \
1121                         parse_error = 1;                                        \
1122                 }                                                               \
1123                 break;                                                          \
1124         }                                                                       \
1125         if (option_info) {                                                      \
1126                 FILE *tmp_fd = sm_outfd;                                        \
1127                 sm_outfd = sql_outfd;                                           \
1128                 sm_prefix();                                                    \
1129                 sm_printf("SQL%s: insert %sinto " #table " values(",            \
1130                           late ? "_late" : "", ignore ? "or ignore " : "");     \
1131                 sm_printf(values);                                              \
1132                 sm_printf(");\n");                                              \
1133                 sm_outfd = tmp_fd;                                              \
1134         }                                                                       \
1135 } while (0)
1136
1137 #define sql_insert(table, values...) sql_insert_helper(table, NULL, 0, 0, values);
1138 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, NULL, 1, 0, values);
1139 #define sql_insert_late(table, values...) sql_insert_helper(table, NULL, 0, 1, values);
1140 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1141 #define sql_insert_cache_or_ignore(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1142
1143 char *get_static_filter(struct symbol *sym);
1144
1145 void sql_insert_return_states(int return_id, const char *return_ranges,
1146                 int type, int param, const char *key, const char *value);
1147 void sql_insert_caller_info(struct expression *call, int type, int param,
1148                 const char *key, const char *value);
1149 void sql_insert_function_ptr(const char *fn, const char *struct_name);
1150 void sql_insert_return_values(const char *return_values);
1151 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
1152 void sql_insert_function_type_size(const char *member, const char *ranges);
1153 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
1154 void sql_insert_type_info(int type, const char *member, const char *value);
1155 void sql_insert_local_values(const char *name, const char *value);
1156 void sql_insert_function_type_value(const char *type, const char *value);
1157 void sql_insert_function_type(int param, const char *value);
1158 void sql_insert_parameter_name(int param, const char *value);
1159 void sql_insert_data_info(struct expression *data, int type, const char *value);
1160 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
1161 void sql_save_constraint(const char *con);
1162 void sql_save_constraint_required(const char *data, int op, const char *limit);
1163 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
1164 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
1165 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
1166 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);
1167 void sql_insert_mtag_info(mtag_t tag, int type, const char *value);
1168 void sql_insert_mtag_map(mtag_t container, int container_offset, mtag_t tag, int tag_offset);
1169 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
1170 int mtag_map_select_container(mtag_t tag, int container_offset, mtag_t *container);
1171 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);
1172 struct smatch_state *get_mtag_return(struct expression *expr, struct smatch_state *state);
1173 struct range_list *swap_mtag_seed(struct expression *expr, struct range_list *rl);
1174
1175 bool is_fn_ptr(struct expression *fn);
1176 void sql_select_return_states(const char *cols, struct expression *call,
1177         int (*callback)(void*, int, char**, char**), void *info);
1178 void sql_select_call_implies(const char *cols, struct expression *call,
1179         int (*callback)(void*, int, char**, char**));
1180
1181 void open_smatch_db(char *db_file);
1182
1183 /* smatch_files.c */
1184 int open_data_file(const char *filename);
1185 int open_schema_file(const char *schema);
1186 struct token *get_tokens_file(const char *filename);
1187 struct string_list *load_strings_from_file(const char *project, const char *filename);
1188
1189 /* smatch.c */
1190 extern char *option_debug_check;
1191 extern char *option_debug_var;
1192 extern char *option_process_function;
1193 extern char *option_project_str;
1194 extern char *bin_dir;
1195 extern char *data_dir;
1196 extern int option_no_data;
1197 extern int option_full_path;
1198 extern int option_call_tree;
1199 extern int num_checks;
1200
1201 enum project_type {
1202         PROJ_NONE,
1203         PROJ_KERNEL,
1204         PROJ_WINE,
1205         PROJ_ILLUMOS_KERNEL,
1206         PROJ_ILLUMOS_USER,
1207         PROJ_UNKNOWN,
1208 };
1209 extern enum project_type option_project;
1210 const char *check_name(unsigned short id);
1211 int id_from_name(const char *name);
1212
1213
1214 /* smatch_buf_size.c */
1215 int bytes_to_elements(struct expression *expr, int bytes);
1216 int get_array_size(struct expression *expr);
1217 int get_array_size_bytes(struct expression *expr);
1218 int get_array_size_bytes_min(struct expression *expr);
1219 int get_array_size_bytes_max(struct expression *expr);
1220 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1221 int get_real_array_size(struct expression *expr);
1222 int last_member_is_resizable(struct symbol *type);
1223 /* smatch_strlen.c */
1224 bool is_strlen(struct expression *expr);
1225 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1226 int get_size_from_strlen(struct expression *expr);
1227
1228 /* smatch_capped.c */
1229 int is_capped(struct expression *expr);
1230 int is_capped_var_sym(const char *name, struct symbol *sym);
1231
1232 /* smatch_kernel_user_data.c */
1233 int is_user_macro(struct expression *expr);
1234 int is_capped_user_data(struct expression *expr);
1235 int implied_user_data(struct expression *expr, struct range_list **rl);
1236 struct stree *get_user_stree(void);
1237 int get_user_rl(struct expression *expr, struct range_list **rl);
1238 int is_user_rl(struct expression *expr);
1239 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1240 void mark_as_user_data(struct expression *expr, bool isnew);
1241 bool user_rl_capped_var_sym(const char *name, struct symbol *sym);
1242 bool user_rl_capped(struct expression *expr);
1243 struct range_list *var_user_rl(struct expression *expr);
1244 bool we_pass_user_data(struct expression *call);
1245 /* smatch_points_to_user_data.c */
1246 bool is_user_data_fn(struct symbol *fn);
1247 bool is_skb_data(struct expression *expr);
1248 bool is_socket_stuff(struct symbol *sym);
1249 bool points_to_user_data(struct expression *expr);
1250 void set_array_user_ptr(struct expression *expr, bool is_new);
1251
1252 /* smatch_kernel_host_data.c */
1253 int is_host_macro(struct expression *expr);
1254 int get_host_data_fn_param(const char *fn);
1255 int is_capped_host_data(struct expression *expr);
1256 int implied_host_data(struct expression *expr, struct range_list **rl);
1257 struct stree *get_host_stree(void);
1258 int get_host_rl(struct expression *expr, struct range_list **rl);
1259 int is_host_rl(struct expression *expr);
1260 int get_host_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1261 bool host_rl_capped(struct expression *expr);
1262 struct range_list *var_host_rl(struct expression *expr);
1263 bool we_pass_host_data(struct expression *call);
1264 /* smatch_points_to_host_data.c */
1265 bool is_host_data_fn(struct symbol *fn);
1266 bool points_to_host_data(struct expression *expr);
1267 void set_points_to_host_data(struct expression *expr, bool is_new);
1268 bool is_fn_points_to_host_data(const char *fn);
1269 /* check_locking.c */
1270 void print_held_locks();
1271 /* preempt */
1272 void __preempt_add(void);
1273 void __preempt_sub(void);
1274 int get_preempt_cnt(void);
1275 void clear_preempt_cnt(void);
1276 bool function_decrements_preempt(void);
1277 void add_sleep_callback(expr_func *fn);
1278 unsigned long GFP_DIRECT_RECLAIM(void);
1279 unsigned long GFP_ATOMIC(void);
1280 bool in_irq_context(void);
1281 void clear_irq_context(void);
1282
1283 /* check_assigned_expr.c */
1284 extern int check_assigned_expr_id;
1285 struct expression *get_assigned_expr(struct expression *expr);
1286 struct sm_state *get_assigned_sm(struct expression *expr);
1287 struct expression *get_assigned_expr_recurse(struct expression *expr);
1288 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1289 struct expression *get_assigned_expr_name_sym_recurse(const char *name, struct symbol *sym);
1290
1291 /* smatch_return_to_param.c */
1292 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1293
1294 /* smatch_comparison.c */
1295 extern int comparison_id;
1296 #define UNKNOWN_COMPARISON 0
1297 #define IMPOSSIBLE_COMPARISON -1
1298 struct compare_data {
1299         /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1300         struct expression *left;
1301         const char *left_var;
1302         struct var_sym_list *left_vsl;
1303         int comparison;
1304         struct expression *right;
1305         const char *right_var;
1306         struct var_sym_list *right_vsl;
1307 };
1308 DECLARE_ALLOCATOR(compare_data);
1309 struct smatch_state *alloc_compare_state(
1310                 struct expression *left,
1311                 const char *left_var, struct var_sym_list *left_vsl,
1312                 int comparison,
1313                 struct expression *right,
1314                 const char *right_var, struct var_sym_list *right_vsl);
1315 int comparison_intersection(int orig, int op);
1316 int merge_comparisons(int one, int two);
1317 int combine_comparisons(int left_compare, int right_compare);
1318 int state_to_comparison(struct smatch_state *state);
1319 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1320 int get_comparison(struct expression *left, struct expression *right);
1321 int get_comparison_no_extra(struct expression *a, struct expression *b);
1322 int get_comparison_strings(const char *one, const char *two);
1323 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1324 struct state_list *get_all_comparisons(struct expression *expr);
1325 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1326 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1327 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1328 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1329 char *expr_equal_to_param(struct expression *expr, int ignore);
1330 char *expr_lte_to_param(struct expression *expr, int ignore);
1331 char *expr_param_comparison(struct expression *expr, int ignore);
1332 int flip_comparison(int op);
1333 int negate_comparison(int op);
1334 int remove_unsigned_from_comparison(int op);
1335 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1336 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1337 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,
1338                                 const char *state_name,
1339                                 struct smatch_state *true_state, struct smatch_state *false_state);
1340 int impossibly_high_comparison(struct expression *expr);
1341 void add_comparison_var_sym(
1342                 struct expression *left_expr,
1343                 const char *left_name, struct var_sym_list *left_vsl,
1344                 int comparison,
1345                 struct expression *right_expr,
1346                 const char *right_name, struct var_sym_list *right_vsl,
1347                 struct expression *mod_expr);
1348
1349 /* smatch_sval.c */
1350 sval_t *sval_alloc(sval_t sval);
1351 sval_t *sval_alloc_permanent(sval_t sval);
1352 sval_t sval_blank(struct expression *expr);
1353 sval_t sval_type_val(struct symbol *type, long long val);
1354 sval_t sval_type_fval(struct symbol *type, long double fval);
1355 sval_t sval_from_val(struct expression *expr, long long val);
1356 sval_t sval_from_fval(struct expression *expr, long double fval);
1357 int sval_is_ptr(sval_t sval);
1358 bool sval_is_fp(sval_t sval);
1359 int sval_unsigned(sval_t sval);
1360 int sval_signed(sval_t sval);
1361 int sval_bits(sval_t sval);
1362 int sval_bits_used(sval_t sval);
1363 int sval_is_negative(sval_t sval);
1364 int sval_is_positive(sval_t sval);
1365 int sval_is_min(sval_t sval);
1366 int sval_is_max(sval_t sval);
1367 int sval_is_a_min(sval_t sval);
1368 int sval_is_a_max(sval_t sval);
1369 int sval_is_negative_min(sval_t sval);
1370 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1371 int sval_cmp_val(sval_t one, long long val);
1372 sval_t sval_min(sval_t one, sval_t two);
1373 sval_t sval_min_nonneg(sval_t one, sval_t two);
1374 sval_t sval_max(sval_t one, sval_t two);
1375 int sval_too_low(struct symbol *type, sval_t sval);
1376 int sval_too_high(struct symbol *type, sval_t sval);
1377 int sval_fits(struct symbol *type, sval_t sval);
1378 sval_t sval_cast(struct symbol *type, sval_t sval);
1379 sval_t sval_preop(sval_t sval, int op);
1380 sval_t sval_binop(sval_t left, int op, sval_t right);
1381 int sval_binop_overflows(sval_t left, int op, sval_t right);
1382 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);
1383 int find_first_zero_bit(unsigned long long uvalue);
1384 int sm_fls64(unsigned long long uvalue);
1385 unsigned long long fls_mask(unsigned long long uvalue);
1386 unsigned long long sval_fls_mask(sval_t sval);
1387 const char *sval_to_str(sval_t sval);
1388 const char *sval_to_str_or_err_ptr(sval_t sval);
1389 const char *sval_to_numstr(sval_t sval);
1390 sval_t ll_to_sval(long long val);
1391
1392 /* smatch_string_list.c */
1393 int list_has_string(struct string_list *str_list, const char *str);
1394 int insert_string(struct string_list **str_list, const char *str);
1395 struct string_list *clone_str_list(struct string_list *orig);
1396 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1397
1398 /* smatch_start_states.c */
1399 struct stree *get_start_states(void);
1400
1401 /* smatch_recurse.c */
1402 int recurse(struct expression *expr,
1403             int (func)(struct expression *expr, void *p),
1404             void *param, int nr);
1405 int has_symbol(struct expression *expr, struct symbol *sym);
1406 int has_variable(struct expression *expr, struct expression *var);
1407 int has_inc_dec(struct expression *expr);
1408
1409 /* smatch_stored_conditions.c */
1410 struct smatch_state *get_stored_condition(struct expression *expr);
1411 struct expression_list *get_conditions(struct expression *expr);
1412 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1413                         struct state_list **true_stack,
1414                         struct state_list **false_stack);
1415 /* smatch_parsed_conditions.c */
1416 struct sm_state *parsed_condition_implication_hook(struct expression *expr,
1417                         struct state_list **true_stack,
1418                         struct state_list **false_stack);
1419 /* smatch_comparison.c */
1420 struct sm_state *comparison_implication_hook(struct expression *expr,
1421                                              struct state_list **true_stack,
1422                                              struct state_list **false_stack);
1423
1424 /* check_string_len.c */
1425 int get_formatted_string_size(struct expression *call, int arg);
1426 int get_formatted_string_min_size(struct expression *call, int arg);
1427
1428 /* smatch_param_set.c */
1429 int param_was_set(struct expression *expr);
1430 int param_was_set_var_sym(const char *name, struct symbol *sym);
1431 void print_limited_param_set(int return_id, char *return_ranges, struct expression *expr);
1432 /* param_clear */
1433 void __promote_sets_to_clears(int return_id, char *return_ranges, struct expression *expr);
1434 bool parent_was_PARAM_CLEAR(const char *name, struct symbol *sym);
1435 bool parent_was_PARAM_CLEAR_ZERO(const char *name, struct symbol *sym);
1436
1437 /* smatch_param_filter.c */
1438 int param_has_filter_data(struct sm_state *sm);
1439
1440 /* smatch_links.c */
1441 void set_up_link_functions(int id, int linkid);
1442 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1443 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1444
1445 /* check_buf_comparison */
1446 const char *limit_type_str(unsigned int limit_type);
1447 struct expression *get_size_variable(struct expression *buf, int *limit_type);
1448 struct expression *get_array_variable(struct expression *size);
1449 int buf_comparison_index_ok(struct expression *expr);
1450 bool buf_comp_has_bytes(struct expression *buf, struct expression *var);
1451 bool buf_comp2_has_bytes(struct expression *buf_expr, struct expression *var);
1452 bool buf_has_bytes(struct expression *buf, struct expression *var);
1453
1454 /* smatch_untracked_param.c */
1455 void mark_untracked(struct expression *expr, int param, char *key, char *value);
1456 void mark_call_params_untracked(struct expression *call);
1457 void add_untracked_param_hook(void (func)(struct expression *call, int param));
1458 void add_lost_param_hook(void (func)(struct expression *call, int param));
1459 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1460 /* smatch_untracked_var.c */
1461 bool is_untracked(struct expression *expr);
1462
1463 /* smatch_strings.c */
1464 struct state_list *get_strings(struct expression *expr);
1465 struct expression *fake_string_from_mtag(mtag_t tag);
1466
1467 /* smatch_estate.c */
1468 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1469
1470 /* smatch_address.c */
1471 int get_address_rl(struct expression *expr, struct range_list **rl);
1472 int get_member_offset(struct symbol *type, const char *member_name);
1473 int get_member_offset_from_deref(struct expression *expr);
1474
1475 /* for now this is in smatch_used_parameter.c */
1476 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1477 extern int __ignore_param_used;
1478
1479 /* smatch_buf_comparison.c */
1480 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1481
1482 struct range_list *get_fs(void);
1483
1484 struct stree *get_all_return_states(void);
1485 struct stree_stack *get_all_return_strees(void);
1486 int on_atomic_dec_path(void);
1487 int was_inced(const char *name, struct symbol *sym);
1488 int refcount_was_inced_name_sym(const char *name, struct symbol *sym, const char *counter_str);
1489 int refcount_was_inced(struct expression *expr, const char *counter_str);
1490 void set_refcount_inc(char *name, struct symbol *sym);
1491 void set_refcount_dec(char *name, struct symbol *sym);
1492 void add_refcount_init_hook(name_sym_hook *hook);
1493 void add_refcount_inc_hook(name_sym_hook *hook);
1494 void add_refcount_dec_hook(name_sym_hook *hook);
1495
1496 /* smatch_constraints.c */
1497 char *get_constraint_str(struct expression *expr);
1498 struct constraint_list *get_constraints(struct expression *expr);
1499 char *unmet_constraint(struct expression *data, struct expression *offset);
1500 char *get_required_constraint(const char *data_str);
1501
1502 /* smatch_container_of.c */
1503 int get_param_from_container_of(struct expression *expr);
1504 int get_offset_from_container_of(struct expression *expr);
1505 char *get_container_name(struct expression *container, struct expression *expr);
1506
1507 /* smatch_mtag.c */
1508 unsigned long long str_to_llu_hash_helper(const char *str);
1509 unsigned long long str_to_llu_hash(const char *str);
1510 struct symbol *get_symbol_from_mtag(mtag_t tag);
1511 mtag_t str_to_mtag(const char *str);
1512 int get_string_mtag(struct expression *expr, mtag_t *tag);
1513 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);
1514 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1515 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1516 void update_mtag_data(struct expression *expr, struct smatch_state *state);
1517 int get_mtag_sval(struct expression *expr, sval_t *sval);
1518
1519 /* Trinity fuzzer stuff */
1520 const char *get_syscall_arg_type(struct symbol *sym);
1521
1522 /* smatch_bits.c */
1523 int binfo_equiv(struct bit_info *one, struct bit_info *two);
1524 struct bit_info *alloc_bit_info(unsigned long long set, unsigned long long possible);
1525 struct smatch_state *alloc_bstate(unsigned long long set, unsigned long long possible);
1526 struct smatch_state *merge_bstates(struct smatch_state *one_state, struct smatch_state *two_state);
1527
1528 /* smatch_param_bits_set.c */
1529 void __set_param_modified_helper(struct expression *expr, struct  smatch_state *state);
1530 void __set_param_modified_helper_sym(const char *name, struct symbol *sym,
1531                                      struct smatch_state *state);
1532
1533 /* smatch_param_bits_clear.c */
1534 void __set_param_modified_helper_clear(struct expression *expr, struct smatch_state *state);
1535 void __set_param_modified_helper_sym_clear(const char *name, struct symbol *sym,
1536                                            struct smatch_state *state);
1537
1538 /* smatch_bit_info.c */
1539 struct bit_info *rl_to_binfo(struct range_list *rl);
1540 struct bit_info *get_bit_info(struct expression *expr);
1541 struct bit_info *get_bit_info_var_sym(const char *name, struct symbol *sym);
1542
1543 /* smatch_mem_tracker.c */
1544 extern int option_mem;
1545 unsigned long get_mem_kb(void);
1546 unsigned long get_max_memory(void);
1547
1548 /* smatch_goto_tracker.c */
1549 struct sm_state *get_goto_sm_state(void);
1550
1551 /* check_is_nospec.c */
1552 bool is_nospec(struct expression *expr);
1553 long get_stmt_cnt(void);
1554
1555 /* check_kernel_units.c */
1556 struct smatch_state *get_units(struct expression *expr);
1557 char *get_unit_str(struct expression *expr);
1558 bool is_array_size_units(struct expression *expr);
1559 /* smatch_nul_terminator.c */
1560 bool is_nul_terminated_var_sym(const char *name, struct symbol *sym);
1561 bool is_nul_terminated(struct expression *expr);
1562 /* check_kernel.c  */
1563 bool is_ignored_kernel_data(const char *name);
1564 int get_gfp_param(struct expression *expr);
1565 struct expression *get_netdev_priv(struct expression *dev);
1566
1567 bool is_fresh_alloc_var_sym(const char *var, struct symbol *sym);
1568 bool is_fresh_alloc(struct expression *expr);
1569 bool is_freed_var_sym(const char *name, struct symbol *sym);
1570 void track_freed_param(struct expression *expr, struct smatch_state *state);
1571 void track_freed_param_var_sym(const char *name, struct symbol *sym,
1572                                struct smatch_state *state);
1573 bool is_part_of_condition(struct expression *expr);
1574 bool is_percent_p_print(struct expression *expr);
1575
1576 void add_free_hook(name_sym_hook *hook);
1577
1578 /* smatch_unconstant_macros.c */
1579 int is_unconstant_macro(struct expression *expr);
1580
1581 /* smatch_assigned_state.c */
1582 void add_state_assigned_hook(int owner, sm_hook *call_back);
1583 void add_ssa_state_assigned_hook(int owner, sm_hook *call_back);
1584
1585 /* check_returns_negative_error_code.c */
1586 bool holds_kernel_error_codes(struct expression *expr);
1587 bool possible_err_ptr(struct expression *expr);
1588 bool has_devm_cleanup(void);
1589 void add_set_current_state_hook(string_hook *hook);
1590 bool task_not_running(void);
1591
1592 static inline bool type_is_ptr(struct symbol *type)
1593 {
1594         return type &&
1595                (type->type == SYM_PTR ||
1596                 type->type == SYM_ARRAY ||
1597                 type->type == SYM_FN);
1598 }
1599
1600 static inline bool type_is_fp(struct symbol *type)
1601 {
1602         return type &&
1603                (type == &float_ctype ||
1604                 type == &double_ctype ||
1605                 type == &ldouble_ctype);
1606 }
1607
1608 static inline int type_bits(struct symbol *type)
1609 {
1610         if (!type)
1611                 return 0;
1612         if (type_is_ptr(type))
1613                 return bits_in_pointer;
1614         if (!type->examined)
1615                 examine_symbol_type(type);
1616         return type->bit_size;
1617 }
1618
1619 static inline int type_unsigned(struct symbol *base_type)
1620 {
1621         if (!base_type)
1622                 return 0;
1623         if (is_ptr_type(base_type))
1624                 return 1;
1625         if (base_type->ctype.modifiers & MOD_UNSIGNED)
1626                 return 1;
1627         return 0;
1628 }
1629
1630 static inline int type_positive_bits(struct symbol *type)
1631 {
1632         if (!type)
1633                 return 0;
1634         if (is_ptr_type(type))
1635                 return bits_in_pointer;
1636         if (type_unsigned(type))
1637                 return type_bits(type);
1638         return type_bits(type) - 1;
1639 }
1640
1641 static inline int sval_positive_bits(sval_t sval)
1642 {
1643         return type_positive_bits(sval.type);
1644 }
1645
1646 /*
1647  * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1648  */
1649
1650 static inline int fp_cmp(sval_t one, sval_t two)
1651 {
1652         struct symbol *type;
1653
1654         if (sval_is_fp(one) && sval_is_fp(two))
1655                 type = type_bits(one.type) > type_bits(two.type) ? one.type : two.type;
1656         else if (sval_is_fp(one))
1657                 type = one.type;
1658         else
1659                 type = two.type;
1660
1661         one = sval_cast(type, one);
1662         two = sval_cast(type, two);
1663
1664         if (one.type == &float_ctype) {
1665                 if (one.fvalue < two.fvalue)
1666                         return -1;
1667                 if (one.fvalue == two.fvalue)
1668                         return 0;
1669                 return 1;
1670         }
1671         if (one.type == &double_ctype) {
1672                 if (one.dvalue < two.dvalue)
1673                         return -1;
1674                 if (one.dvalue == two.dvalue)
1675                         return 0;
1676                 return 1;
1677         }
1678         if (one.type == &ldouble_ctype) {
1679                 if (one.ldvalue < two.ldvalue)
1680                         return -1;
1681                 if (one.ldvalue == two.ldvalue)
1682                         return 0;
1683                 return 1;
1684         }
1685         sm_perror("bad type in fp_cmp(): %s", type_to_str(type));
1686         return 1;
1687 }
1688
1689 static inline int sval_cmp(sval_t one, sval_t two)
1690 {
1691         struct symbol *type;
1692
1693         if (sval_is_fp(one) || sval_is_fp(two))
1694                 return fp_cmp(one, two);
1695
1696         type = one.type;
1697         if (sval_positive_bits(two) > sval_positive_bits(one))
1698                 type = two.type;
1699         if (type_bits(type) < 31)
1700                 type = &int_ctype;
1701
1702         one = sval_cast(type, one);
1703         two = sval_cast(type, two);
1704
1705         if (type_unsigned(type)) {
1706                 if (one.uvalue < two.uvalue)
1707                         return -1;
1708                 if (one.uvalue == two.uvalue)
1709                         return 0;
1710                 return 1;
1711         }
1712         /* fix me handle type promotion and unsigned values */
1713         if (one.value < two.value)
1714                 return -1;
1715         if (one.value == two.value)
1716                 return 0;
1717         return 1;
1718 }
1719
1720 #endif      /* !SMATCH_H_ */