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 extern struct smatch_state undefined;
  43 extern struct smatch_state merged;
  44 extern struct smatch_state true_state;
  45 extern struct smatch_state false_state;
  46 DECLARE_ALLOCATOR(smatch_state);
  47
  48 static inline void *INT_PTR(int i)
  49 {
  50         return (void *)(long)i;
  51 }
  52
  53 static inline int PTR_INT(void *p)
  54 {
  55         return (int)(long)p;
  56 }
  57
  58 struct tracker {
  59         char *name;
  60         struct symbol *sym;
  61         unsigned short owner;
  62 };
  63 DECLARE_ALLOCATOR(tracker);
  64 DECLARE_PTR_LIST(tracker_list, struct tracker);
  65 DECLARE_PTR_LIST(stree_stack, struct stree);
  66
  67 /* The first 3 struct members must match struct tracker */
  68 struct sm_state {
  69         const char *name;
  70         struct symbol *sym;
  71         unsigned short owner;
  72         unsigned short merged:1;
  73         unsigned short leaf:1;
  74         unsigned int line;
  75         struct smatch_state *state;
  76         struct stree *pool;
  77         struct sm_state *left;
  78         struct sm_state *right;
  79         struct state_list *possible;
  80 };
  81
  82 struct var_sym {
  83         char *var;
  84         struct symbol *sym;
  85 };
  86 DECLARE_ALLOCATOR(var_sym);
  87 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  88
  89 struct constraint {
  90         int op;
  91         int id;
  92 };
  93 DECLARE_PTR_LIST(constraint_list, struct constraint);
  94
  95 struct alloc_info {
  96         const char *fn;
  97         int size_param, nr;
  98 };
  99 extern struct alloc_info *alloc_funcs;
 100
 101 struct bit_info {
 102         unsigned long long set;
 103         unsigned long long possible;
 104 };
 105
 106 enum hook_type {
 107         EXPR_HOOK,
 108         EXPR_HOOK_AFTER,
 109         STMT_HOOK,
 110         STMT_HOOK_AFTER,
 111         SYM_HOOK,
 112         STRING_HOOK,
 113         DECLARATION_HOOK,
 114         DECLARATION_HOOK_AFTER,
 115         ASSIGNMENT_HOOK,
 116         ASSIGNMENT_HOOK_AFTER,
 117         RAW_ASSIGNMENT_HOOK,
 118         GLOBAL_ASSIGNMENT_HOOK,
 119         LOGIC_HOOK,
 120         CONDITION_HOOK,
 121         PRELOOP_HOOK,
 122         SELECT_HOOK,
 123         WHOLE_CONDITION_HOOK,
 124         FUNCTION_CALL_HOOK_BEFORE,
 125         FUNCTION_CALL_HOOK,
 126         CALL_HOOK_AFTER_INLINE,
 127         FUNCTION_CALL_HOOK_AFTER_DB,
 128         CALL_ASSIGNMENT_HOOK,
 129         MACRO_ASSIGNMENT_HOOK,
 130         BINOP_HOOK,
 131         OP_HOOK,
 132         DEREF_HOOK,
 133         CASE_HOOK,
 134         ASM_HOOK,
 135         CAST_HOOK,
 136         SIZEOF_HOOK,
 137         BASE_HOOK,
 138         FUNC_DEF_HOOK,
 139         AFTER_DEF_HOOK,
 140         END_FUNC_HOOK,
 141         AFTER_FUNC_HOOK,
 142         RETURN_HOOK,
 143         INLINE_FN_START,
 144         INLINE_FN_END,
 145         END_FILE_HOOK,
 146         NUM_HOOKS,
 147 };
 148
 149 #define TRUE 1
 150 #define FALSE 0
 151
 152 struct range_list;
 153
 154 void add_hook(void *func, enum hook_type type);
 155 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 156 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 157 void add_merge_hook(int client_id, merge_func_t *func);
 158 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 159 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *cur, struct sm_state *other));
 160 typedef void (scope_hook)(void *data);
 161 void add_scope_hook(scope_hook *hook, void *data);
 162 typedef void (param_key_hook)(struct expression *expr, const char *name, struct symbol *sym, void *data);
 163 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 164 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 165                                 struct expression *assign_expr, void *data);
 166 typedef void (return_implies_hook)(struct expression *call_expr,
 167                                    int param, char *key, char *value);
 168 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 169 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 170 void add_function_hook_late(const char *look_for, func_hook *call_back, void *info);
 171
 172 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 173                               void *info);
 174 void register_func_hooks_from_file(const char *file,
 175                                    func_hook *call_back, void *info);
 176 void register_assign_hooks_from_file(const char *file,
 177                                      func_hook *call_back, void *info);
 178 void add_implied_return_hook(const char *look_for,
 179                              implied_return_hook *call_back,
 180                              void *info);
 181 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 182                               void *info);
 183 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 184                               void *info);
 185 void return_implies_state(const char *look_for, long long start, long long end,
 186                          implication_hook *call_back, void *info);
 187 void return_implies_state_sval(const char *look_for, sval_t start, sval_t end,
 188                          implication_hook *call_back, void *info);
 189 void return_implies_exact(const char *look_for, sval_t start, sval_t end,
 190                           implication_hook *call_back, void *info);
 191 struct range_list *get_range_implications(const char *fn);
 192 void select_return_states_hook(int type, return_implies_hook *callback);
 193 void select_return_states_before(void (*fn)(void));
 194 void select_return_states_after(void (*fn)(void));
 195 void add_function_param_key_hook(const char *look_for, param_key_hook *call_back,
 196                                  int param, const char *key, void *info);
 197 void add_function_param_key_hook_late(const char *look_for, param_key_hook *call_back,
 198                                       int param, const char *key, void *info);
 199 void return_implies_param_key(const char *look_for, sval_t start, sval_t end,
 200                               param_key_hook *call_back,
 201                               int param, const char *key, void *info);
 202 void return_implies_param_key_exact(const char *look_for, sval_t start, sval_t end,
 203                                     param_key_hook *call_back,
 204                                     int param, const char *key, void *info);
 205 void select_return_param_key(int type, param_key_hook *callback);
 206 int get_implied_return(struct expression *expr, struct range_list **rl);
 207 void allocate_hook_memory(void);
 208 void allocate_tracker_array(int num_checks);
 209
 210 struct modification_data {
 211         struct smatch_state *prev;
 212         struct expression *cur;
 213 };
 214
 215 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 216 bool is_sub_member(const char *name, struct symbol *sym, struct sm_state *sm);
 217 void add_modification_hook(int owner, modification_hook *call_back);
 218 void add_modification_hook_late(int owner, modification_hook *call_back);
 219 struct smatch_state *get_modification_state(struct expression *expr);
 220
 221 int outside_of_function(void);
 222 const char *get_filename(void);
 223 const char *get_base_file(void);
 224 char *get_function(void);
 225 int get_lineno(void);
 226 extern int final_pass;
 227 extern struct symbol *cur_func_sym;
 228 extern int option_debug;
 229 extern int local_debug;
 230 extern int debug_db;
 231 extern bool implied_debug;
 232 bool debug_implied(void);
 233 bool debug_on(const char *check_name, const char *var);
 234 extern int option_info;
 235 extern int option_spammy;
 236 extern int option_pedantic;
 237 extern int option_print_names;
 238 extern char *trace_variable;
 239 extern struct stree *global_states;
 240 void set_function_skipped(void);
 241 int is_skipped_function(void);
 242 int is_silenced_function(void);
 243 extern bool implications_off;
 244
 245 /* smatch_impossible.c */
 246 int is_impossible_path(void);
 247 void set_path_impossible(void);
 248
 249 extern FILE *sm_outfd;
 250 extern FILE *sql_outfd;
 251 extern FILE *caller_info_fd;
 252 extern int sm_nr_checks;
 253 extern int sm_nr_errors;
 254
 255 /*
 256  * How to use these routines:
 257  *
 258  * sm_fatal(): an internal error of some kind that should immediately exit
 259  * sm_ierror(): an internal error
 260  * sm_perror(): an internal error from parsing input source
 261  * sm_error(): an error from input source
 262  * sm_warning(): a warning from input source
 263  * sm_info(): info message (from option_info)
 264  * sm_debug(): debug message
 265  * sm_msg(): other message (please avoid using this)
 266  */
 267
 268 #define sm_printf(msg...) do {                                          \
 269         if (final_pass || option_debug || local_debug || debug_db)      \
 270                 fprintf(sm_outfd, msg);                                 \
 271 } while (0)
 272
 273 static inline void sm_prefix(void)
 274 {
 275         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 276         if (option_info || !option_print_names)
 277                 return;
 278         sm_printf("[smatch.%s] ", __CHECKNAME__);
 279 }
 280
 281 static inline void print_implied_debug_msg();
 282
 283 extern bool __silence_warnings_for_stmt;
 284
 285 #define sm_print_msg(type, msg...) \
 286 do {                                                           \
 287         print_implied_debug_msg();                             \
 288         if (!final_pass && !option_debug && !local_debug && !debug_db)    \
 289                 break;                                         \
 290         if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
 291                 break;                                         \
 292         if (!option_info && is_silenced_function())            \
 293                 break;                                         \
 294         sm_prefix();                                           \
 295         if (type == 1) {                                       \
 296                 sm_printf("warn: ");                           \
 297                 sm_nr_checks++;                                \
 298         } else if (type == 2) {                                \
 299                 sm_printf("error: ");                          \
 300                 sm_nr_checks++;                                \
 301         } else if (type == 3) {                                \
 302                 sm_printf("parse error: ");                    \
 303                 sm_nr_errors++;                                \
 304         }                                                      \
 305         sm_printf(msg);                                        \
 306         sm_printf("\n");                                       \
 307 } while (0)
 308
 309 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
 310
 311 extern char *implied_debug_msg;
 312 static inline void print_implied_debug_msg(void)
 313 {
 314         static struct symbol *last_printed = NULL;
 315
 316         if (!implied_debug_msg)
 317                 return;
 318         if (last_printed == cur_func_sym)
 319                 return;
 320         last_printed = cur_func_sym;
 321         sm_msg("%s", implied_debug_msg);
 322 }
 323
 324 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 325 #define db_debug(msg...) do { if (option_debug || debug_db) sm_printf(msg); } while (0)
 326
 327 #define sm_info(msg...) do {                                    \
 328         if (option_debug || (option_info && final_pass)) {      \
 329                 sm_prefix();                                    \
 330                 sm_printf("info: ");                            \
 331                 sm_printf(msg);                                 \
 332                 sm_printf("\n");                                \
 333         }                                                       \
 334 } while(0)
 335
 336 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
 337 #define sm_warning_line(line, msg...) do {      \
 338         int __orig = __smatch_lineno;           \
 339         __smatch_lineno = line;                 \
 340         sm_print_msg(1, msg);                   \
 341         __smatch_lineno = __orig;               \
 342 } while (0)
 343 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
 344 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
 345 #define sm_spam(msg...) do { if (option_pedantic) sm_print_msg(1, msg); } while (0)
 346
 347 static inline void sm_fatal(const char *fmt, ...)
 348 {
 349         va_list args;
 350
 351         va_start(args, fmt);
 352         vfprintf(sm_outfd, fmt, args);
 353         va_end(args);
 354
 355         fprintf(sm_outfd, "\n");
 356
 357         exit(1);
 358 }
 359
 360 static inline void sm_ierror(const char *fmt, ...)
 361 {
 362         va_list args;
 363
 364         sm_nr_errors++;
 365
 366         fprintf(sm_outfd, "internal error: ");
 367
 368         va_start(args, fmt);
 369         vfprintf(sm_outfd, fmt, args);
 370         va_end(args);
 371
 372         fprintf(sm_outfd, "\n");
 373 }
 374 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
 375
 376 bool has_states(struct stree *stree, int owner);
 377 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym);
 378 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 379 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 380 bool has_possible_state(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 381 bool expr_has_possible_state(int owner, struct expression *expr, struct smatch_state *state);
 382 struct state_list *get_possible_states(int owner, const char *name,
 383                                        struct symbol *sym);
 384 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 385 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 386                struct smatch_state *state);
 387 struct sm_state *set_state_expr(int owner, struct expression *expr,
 388                 struct smatch_state *state);
 389 void __delete_state(int owner, const char *name, struct symbol *sym);
 390 void __delete_all_states_sym(struct symbol *sym);
 391 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 392                            struct smatch_state *true_state,
 393                            struct smatch_state *false_state);
 394 void set_true_false_states_expr(int owner, struct expression *expr,
 395                            struct smatch_state *true_state,
 396                            struct smatch_state *false_state);
 397
 398 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 399 struct stree *get_all_states_stree(int id);
 400 struct stree *__get_cur_stree(void);
 401 int is_reachable(void);
 402 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
 403
 404 /* smatch_ssa.c */
 405 char *ssa_name(const char *name);
 406 void set_ssa_state(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 407 void update_ssa_state(int owner, const char *name, struct symbol *sym,
 408                       struct smatch_state *state);
 409 void set_ssa_state_expr(int owner, struct expression *expr, struct smatch_state *state);
 410 struct sm_state *get_ssa_sm_state(int owner, const char *name, struct symbol *sym);
 411 struct sm_state *get_ssa_sm_state_expr(int owner, struct expression *expr);
 412 struct smatch_state *get_ssa_state(int owner, const char *name, struct symbol *sym);
 413 struct smatch_state *get_ssa_state_expr(int owner, struct expression *expr);
 414
 415 /* smatch_helper.c */
 416 DECLARE_PTR_LIST(int_stack, int);
 417 char *alloc_string(const char *str);
 418 char *alloc_string_newline(const char *str);
 419 void free_string(char *str);
 420 void remove_parens(char *str);
 421 struct smatch_state *alloc_state_num(int num);
 422 struct smatch_state *alloc_state_str(const char *name);
 423 struct smatch_state *merge_str_state(struct smatch_state *s1, struct smatch_state *s2);
 424 struct smatch_state *alloc_state_expr(struct expression *expr);
 425 struct expression *get_argument_from_call_expr(struct expression_list *args,
 426                                                int num);
 427 struct expression *get_array_expr(struct expression *expr);
 428
 429 char *expr_to_var(struct expression *expr);
 430 struct symbol *expr_to_sym(struct expression *expr);
 431 char *expr_to_str(struct expression *expr);
 432 char *expr_to_str_sym(struct expression *expr,
 433                                      struct symbol **sym_ptr);
 434 char *expr_to_var_sym(struct expression *expr,
 435                              struct symbol **sym_ptr);
 436 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
 437 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
 438 int get_complication_score(struct expression *expr);
 439
 440 int sym_name_is(const char *name, struct expression *expr);
 441 int get_const_value(struct expression *expr, sval_t *sval);
 442 int get_value(struct expression *expr, sval_t *val);
 443 int get_implied_value(struct expression *expr, sval_t *val);
 444 int get_implied_value_fast(struct expression *expr, sval_t *sval);
 445 int get_implied_min(struct expression *expr, sval_t *sval);
 446 int get_implied_max(struct expression *expr, sval_t *val);
 447 int get_hard_max(struct expression *expr, sval_t *sval);
 448 int get_fuzzy_min(struct expression *expr, sval_t *min);
 449 int get_fuzzy_max(struct expression *expr, sval_t *max);
 450 int get_absolute_min(struct expression *expr, sval_t *sval);
 451 int get_absolute_max(struct expression *expr, sval_t *sval);
 452 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 453 int parse_call_math_rl(struct expression *call, const char *math, struct range_list **rl);
 454 const char *get_allocation_math(struct expression *expr);
 455 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 456 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 457 int expr_is_zero(struct expression *expr);
 458 int known_condition_true(struct expression *expr);
 459 int known_condition_false(struct expression *expr);
 460 int implied_condition_true(struct expression *expr);
 461 int implied_condition_false(struct expression *expr);
 462 int can_integer_overflow(struct symbol *type, struct expression *expr);
 463 void clear_math_cache(void);
 464 void set_fast_math_only(void);
 465 void clear_fast_math_only(void);
 466
 467 int is_array(struct expression *expr);
 468 struct expression *get_array_base(struct expression *expr);
 469 struct expression *get_array_offset(struct expression *expr);
 470 const char *show_state(struct smatch_state *state);
 471 struct statement *get_expression_statement(struct expression *expr);
 472 struct expression *strip_parens(struct expression *expr);
 473 struct expression *strip_expr(struct expression *expr);
 474 struct expression *strip_expr_set_parent(struct expression *expr);
 475 void scoped_state(int my_id, const char *name, struct symbol *sym);
 476 int is_error_return(struct expression *expr);
 477 int getting_address(struct expression *expr);
 478 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
 479 char *get_member_name(struct expression *expr);
 480 char *get_fnptr_name(struct expression *expr);
 481 int cmp_pos(struct position pos1, struct position pos2);
 482 int positions_eq(struct position pos1, struct position pos2);
 483 struct statement *get_current_statement(void);
 484 struct statement *get_prev_statement(void);
 485 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
 486
 487 #define RETURN_VAR    -1
 488 #define LOCAL_SCOPE   -2
 489 #define FILE_SCOPE    -3
 490 #define GLOBAL_SCOPE  -4
 491 #define UNKNOWN_SCOPE -5
 492
 493 char *swap_names(const char *orig, const char *remove, const char *add);
 494 char *get_param_var_sym_var_sym(const char *name, struct symbol *sym, struct expression *ret_expr, struct symbol **sym_p);
 495 char *get_param_name_sym(struct expression *expr, struct symbol **sym_p);
 496 int get_param_key_from_var_sym(const char *name, struct symbol *sym,
 497                                struct expression *ret_expr,
 498                                const char **key);
 499 int get_param_key_from_sm(struct sm_state *sm, struct expression *ret_expr,
 500                           const char **key);
 501 int map_to_param(const char *name, struct symbol *sym);
 502 int get_param_num_from_sym(struct symbol *sym);
 503 int get_param_num(struct expression *expr);
 504 struct symbol *get_param_sym_from_num(int num);
 505
 506 int ms_since(struct timeval *start);
 507 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 508 int parent_is_gone(struct expression *expr);
 509 bool is_noderef_ptr(struct expression *expr);
 510 int invert_op(int op);
 511 int op_remove_assign(int op);
 512 int expr_equiv(struct expression *one, struct expression *two);
 513 void push_int(struct int_stack **stack, int num);
 514 int pop_int(struct int_stack **stack);
 515
 516 /* smatch_type.c */
 517 struct symbol *get_real_base_type(struct symbol *sym);
 518 int type_bytes(struct symbol *type);
 519 int array_bytes(struct symbol *type);
 520 struct symbol *get_pointer_type(struct expression *expr);
 521 struct symbol *get_type(struct expression *expr);
 522 struct symbol *get_comparison_type(struct expression *expr);
 523 struct symbol *get_final_type(struct expression *expr);
 524 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
 525 int type_signed(struct symbol *base_type);
 526 int expr_unsigned(struct expression *expr);
 527 int expr_signed(struct expression *expr);
 528 int returns_unsigned(struct symbol *base_type);
 529 int is_pointer(struct expression *expr);
 530 int returns_pointer(struct symbol *base_type);
 531 sval_t sval_type_max(struct symbol *base_type);
 532 sval_t sval_type_min(struct symbol *base_type);
 533 int nr_bits(struct expression *expr);
 534 int is_void_pointer(struct expression *expr);
 535 int is_char_pointer(struct expression *expr);
 536 int is_string(struct expression *expr);
 537 bool is_struct_ptr(struct symbol *type);
 538 int is_static(struct expression *expr);
 539 bool is_local_variable(struct expression *expr);
 540 int types_equiv(struct symbol *one, struct symbol *two);
 541 bool type_fits(struct symbol *type, struct symbol *test);
 542 int fn_static(void);
 543 const char *global_static();
 544 struct symbol *cur_func_return_type(void);
 545 struct symbol *get_arg_type(struct expression *fn, int arg);
 546 struct symbol *get_member_type_from_key(struct expression *expr, const char *key);
 547 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key);
 548 int is_struct(struct expression *expr);
 549 char *type_to_str(struct symbol *type);
 550
 551 /* smatch_ignore.c */
 552 void add_ignore(int owner, const char *name, struct symbol *sym);
 553 int is_ignored(int owner, const char *name, struct symbol *sym);
 554 void add_ignore_expr(int owner, struct expression *expr);
 555 int is_ignored_expr(int owner, struct expression *expr);
 556
 557 /* smatch_var_sym */
 558 struct smatch_state *alloc_var_sym_state(const char *var, struct symbol *sym);
 559 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 560 struct var_sym_list *expr_to_vsl(struct expression *expr);
 561 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 562 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 563 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 564 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 565 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 566 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 567 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 568 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two);
 569 void free_var_sym_list(struct var_sym_list **list);
 570 void free_var_syms_and_list(struct var_sym_list **list);
 571
 572 /* smatch_tracker */
 573 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 574 void add_tracker(struct tracker_list **list, int owner, const char *name,
 575                 struct symbol *sym);
 576 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 577 void del_tracker(struct tracker_list **list, int owner, const char *name,
 578                 struct symbol *sym);
 579 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 580                 struct symbol *sym);
 581 void free_tracker_list(struct tracker_list **list);
 582 void free_trackers_and_list(struct tracker_list **list);
 583
 584 /* smatch_conditions */
 585 int in_condition(void);
 586
 587 /* smatch_flow.c */
 588
 589 extern int __in_fake_assign;
 590 extern int __in_fake_parameter_assign;
 591 extern int __in_fake_struct_assign;
 592 extern int __in_fake_var_assign;
 593 extern int __fake_state_cnt;
 594 extern int in_fake_env;
 595 void smatch (struct string_list *filelist);
 596 int inside_loop(void);
 597 int definitely_inside_loop(void);
 598 struct expression *get_switch_expr(void);
 599 int in_expression_statement(void);
 600 void __process_post_op_stack(void);
 601 void __split_expr(struct expression *expr);
 602 void __split_label_stmt(struct statement *stmt);
 603 void __split_stmt(struct statement *stmt);
 604 extern int __in_function_def;
 605 extern int __in_unmatched_hook;
 606 extern int option_assume_loops;
 607 extern int option_two_passes;
 608 extern int option_no_db;
 609 extern int option_file_output;
 610 extern int option_time;
 611 extern int option_time_stmt;
 612 extern struct expression_list *big_expression_stack;
 613 extern struct expression_list *big_condition_stack;
 614 extern struct statement_list *big_statement_stack;
 615 int is_assigned_call(struct expression *expr);
 616 int is_fake_assigned_call(struct expression *expr);
 617 void add_function_data(unsigned long *fn_data);
 618 int inlinable(struct expression *expr);
 619 extern int __inline_call;
 620 extern struct expression *__inline_fn;
 621 extern int __in_pre_condition;
 622 extern int __bail_on_rest_of_function;
 623 extern struct statement *__prev_stmt;
 624 extern struct statement *__cur_stmt;
 625 extern struct statement *__next_stmt;
 626 void init_fake_env(void);
 627 void end_fake_env(void);
 628 int time_parsing_function(void);
 629 bool taking_too_long(void);
 630 struct statement *get_last_stmt(void);
 631 int is_last_stmt(struct statement *cur_stmt);
 632
 633 /* smatch_struct_assignment.c */
 634 struct expression *get_faked_expression(void);
 635 void __fake_struct_member_assignments(struct expression *expr);
 636
 637 /* smatch_project.c */
 638 int is_no_inline_function(const char *function);
 639
 640 /* smatch_conditions */
 641 void __split_whole_condition(struct expression *expr);
 642 void __handle_logic(struct expression *expr);
 643 int is_condition(struct expression *expr);
 644 int __handle_condition_assigns(struct expression *expr);
 645 int __handle_select_assigns(struct expression *expr);
 646 int __handle_expr_statement_assigns(struct expression *expr);
 647
 648 /* smatch_implied.c */
 649 struct range_list_stack;
 650 void param_limit_implications(struct expression *expr, int param, char *key, char *value, struct stree **implied);
 651 struct stree *__implied_case_stree(struct expression *switch_expr,
 652                                    struct range_list *case_rl,
 653                                    struct range_list_stack **remaining_cases,
 654                                    struct stree **raw_stree);
 655 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
 656 int assume(struct expression *expr);
 657 void end_assume(void);
 658 int impossible_assumption(struct expression *left, int op, sval_t sval);
 659
 660 /* smatch_slist.h */
 661 bool has_dynamic_states(unsigned short owner);
 662 void set_dynamic_states(unsigned short owner);
 663
 664 /* smatch_extras.c */
 665 int in_warn_on_macro(void);
 666 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */
 667 extern int RETURN_ID;
 668
 669 struct data_range {
 670         sval_t min;
 671         sval_t max;
 672 };
 673
 674 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 675 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 676 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym, bool use_stack);
 677
 678 #define STRLEN_MAX_RET 1010101
 679
 680 /* smatch_absolute.c */
 681 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 682 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 683
 684 /* smatch_type_value.c */
 685 void clear_type_value_cache(void);
 686 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 687
 688 /* smatch_data_val.c */
 689 int get_mtag_rl(struct expression *expr, struct range_list **rl);
 690 /* smatch_array_values.c */
 691 int get_array_rl(struct expression *expr, struct range_list **rl);
 692
 693 /* smatch_states.c */
 694 struct stree *__swap_cur_stree(struct stree *stree);
 695 void __push_fake_cur_stree();
 696 struct stree *__pop_fake_cur_stree();
 697 void __free_fake_cur_stree();
 698 void __set_fake_cur_stree_fast(struct stree *stree);
 699 void __pop_fake_cur_stree_fast(void);
 700 void __merge_stree_into_cur(struct stree *stree);
 701
 702 int unreachable(void);
 703 void __set_cur_stree_readonly(void);
 704 void __set_cur_stree_writable(void);
 705 void __set_sm(struct sm_state *sm);
 706 void __set_sm_cur_stree(struct sm_state *sm);
 707 void __set_true_false_sm(struct sm_state *true_state,
 708                         struct sm_state *false_state);
 709 void nullify_path(void);
 710 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 711                                void *unused);
 712 void __unnullify_path(void);
 713 int __path_is_null(void);
 714 void save_all_states(void);
 715 void restore_all_states(void);
 716 void free_goto_stack(void);
 717 void clear_all_states(void);
 718
 719 struct sm_state *get_sm_state(int owner, const char *name,
 720                                 struct symbol *sym);
 721 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 722 void __push_true_states(void);
 723 void __use_false_states(void);
 724 void __discard_false_states(void);
 725 void __merge_false_states(void);
 726 void __merge_true_states(void);
 727
 728 void __negate_cond_stacks(void);
 729 void __use_pre_cond_states(void);
 730 void __use_cond_true_states(void);
 731 void __use_cond_false_states(void);
 732 void __push_cond_stacks(void);
 733 void __fold_in_set_states(void);
 734 void __free_set_states(void);
 735 struct stree *__copy_cond_true_states(void);
 736 struct stree *__copy_cond_false_states(void);
 737 struct stree *__pop_cond_true_stack(void);
 738 struct stree *__pop_cond_false_stack(void);
 739 void __and_cond_states(void);
 740 void __or_cond_states(void);
 741 void __save_pre_cond_states(void);
 742 void __discard_pre_cond_states(void);
 743 struct stree *__get_true_states(void);
 744 struct stree *__get_false_states(void);
 745 void __use_cond_states(void);
 746 extern struct state_list *__last_base_slist;
 747
 748 void __push_continues(void);
 749 void __discard_continues(void);
 750 void __process_continues(void);
 751 void __merge_continues(void);
 752
 753 void __push_breaks(void);
 754 void __process_breaks(void);
 755 int __has_breaks(void);
 756 void __merge_breaks(void);
 757 void __use_breaks(void);
 758
 759 void __save_switch_states(struct expression *switch_expr);
 760 void __discard_switches(void);
 761 int have_remaining_cases(void);
 762 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl);
 763 void __push_default(void);
 764 void __set_default(void);
 765 int __pop_default(void);
 766
 767 void __push_conditions(void);
 768 void __discard_conditions(void);
 769
 770 void __save_gotos(const char *name, struct symbol *sym);
 771 void __merge_gotos(const char *name, struct symbol *sym);
 772
 773 void __discard_fake_states(struct expression *call);
 774
 775 void __print_cur_stree(void);
 776 bool __print_states(const char *owner);
 777 typedef void (check_tracker_hook)(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 778 void add_check_tracker(const char *check_name, check_tracker_hook *fn);
 779
 780 /* smatch_hooks.c */
 781 void __pass_to_client(void *data, enum hook_type type);
 782 void __pass_case_to_client(struct expression *switch_expr,
 783                            struct range_list *rl);
 784 int __has_merge_function(int client_id);
 785 struct smatch_state *__client_merge_function(int owner,
 786                                              struct smatch_state *s1,
 787                                              struct smatch_state *s2);
 788 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 789 void call_pre_merge_hook(struct sm_state *cur, struct sm_state *other);
 790 void __push_scope_hooks(void);
 791 void __call_scope_hooks(void);
 792 void add_array_initialized_hook(void (*hook)(struct expression *array, int nr));
 793 void __call_array_initialized_hooks(struct expression *array, int nr);
 794
 795 /* smatch_function_hooks.c */
 796 void create_function_hook_hash(void);
 797 void __match_initializer_call(struct symbol *sym);
 798
 799 /* smatch_db.c */
 800 enum info_type {
 801         INTERNAL        = 0,
 802         /*
 803          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 804          * number it can't be re-used right away so there may be gaps.
 805          * We select these in order by type so if the order matters, then give
 806          * it a number below 100-999,9000-9999 ranges. */
 807
 808         PARAM_CLEARED   = 101,
 809         PARAM_LIMIT     = 103,
 810         PARAM_FILTER    = 104,
 811
 812         PARAM_VALUE     = 1001,
 813         BUF_SIZE        = 1002,
 814         CAPPED_DATA     = 1004,
 815         RETURN_VALUE    = 1005,
 816         DEREFERENCE     = 1006,
 817         RANGE_CAP       = 1007,
 818         ABSOLUTE_LIMITS = 1010,
 819         PARAM_ADD       = 1012,
 820         PARAM_FREED     = 1013,
 821         MAYBE_FREED     = 2014,
 822         DATA_SOURCE     = 1014,
 823         FUZZY_MAX       = 1015,
 824         HARD_MAX        = 2015,
 825         STR_LEN         = 1016,
 826         ARRAY_LEN       = 1017,
 827         CAPABLE         = 1018,
 828         NS_CAPABLE      = 1019,
 829         CONTAINER       = 1020,
 830         CASTED_CALL     = 1021,
 831         TYPE_LINK       = 1022,
 832         UNTRACKED_PARAM = 1023,
 833         LOST_PARAM      = 2023,
 834         CULL_PATH       = 1024,
 835         PARAM_SET       = 1025,
 836         PARAM_USED      = 1026,
 837         BYTE_UNITS      = 1027,
 838         COMPARE_LIMIT   = 1028,
 839         PARAM_COMPARE   = 1029,
 840         CONSTRAINT      = 1031,
 841         PASSES_TYPE     = 1032,
 842         CONSTRAINT_REQUIRED = 1033,
 843         BIT_INFO        = 1034,
 844         NOSPEC          = 1035,
 845         NOSPEC_WB       = 1036,
 846         STMT_CNT        = 1037,
 847         TERMINATED      = 1038,
 848         FRESH_ALLOC     = 1044,
 849         ALLOCATOR       = 1045,
 850         FUNC_TIME       = 1047,
 851         POWER_OF_TWO    = 1048,
 852         POWER_OF_TWO_SET = 1049,
 853         BIT_SET         = 1051,
 854         BIT_CLEAR       = 1052,
 855         BIT_IS_SET      = 1053,
 856         BIT_IS_CLEAR    = 1054,
 857
 858         /* put random temporary stuff in the 7000-7999 range for testing */
 859         USER_DATA       = 8017,
 860         USER_DATA_SET   = 9017,
 861         USER_PTR        = 9018,
 862         USER_PTR_SET    = 9019,
 863         NO_OVERFLOW     = 8018,
 864         NO_OVERFLOW_SIMPLE = 8019,
 865         LOCK            = 8020,
 866         UNLOCK          = 8021,
 867         HALF_LOCKED     = 9022,
 868         RESTORE         = 9023,
 869         KNOWN_LOCKED    = 9024,
 870         KNOWN_UNLOCKED  = 9025,
 871         IGNORE_LOCK     = 9026,
 872         SET_FS          = 8022,
 873         ATOMIC_INC      = 8023,
 874         ATOMIC_DEC      = 8024,
 875         REFCOUNT        = 9025,
 876         NO_SIDE_EFFECT  = 8025,
 877         FN_ARG_LINK     = 8028,
 878         DATA_VALUE      = 8029,
 879         ARRAYSIZE_ARG   = 8033,
 880         SIZEOF_ARG      = 8034,
 881         MEMORY_TAG      = 8036,
 882         MTAG_ASSIGN     = 8035,
 883         STRING_VALUE    = 8041,
 884         ALLOC           = 8045,
 885         RELEASE         = 8046,
 886
 887         BYTE_COUNT      = 8050,
 888         ELEM_COUNT      = 8051,
 889         ELEM_LAST       = 8052,
 890         USED_LAST       = 8053,
 891         USED_COUNT      = 8054,
 892 };
 893
 894 extern struct sqlite3 *smatch_db;
 895 extern struct sqlite3 *mem_db;
 896 extern struct sqlite3 *cache_db;
 897
 898 bool db_incomplete(void);
 899 void db_ignore_states(int id);
 900 typedef bool (delete_hook)(struct expression *expr);
 901 void add_delete_return_hook(delete_hook *hook);
 902 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 903 void select_caller_name_sym(void (*fn)(const char *name, struct symbol *sym, char *value), int type);
 904 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 905 void add_caller_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 906 void add_return_info_callback(int owner,
 907                               void (*callback)(int return_id, char *return_ranges,
 908                                                struct expression *returned_expr,
 909                                                int param,
 910                                                const char *printed_name,
 911                                                struct sm_state *sm));
 912 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 913 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));
 914 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 915 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 916 struct range_list *db_return_vals(struct expression *expr);
 917 struct range_list *db_return_vals_from_str(const char *fn_name);
 918 struct range_list *db_return_vals_no_args(struct expression *expr);
 919 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
 920 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
 921 char *get_name_sym_from_key(struct expression *expr, int param, const char *key, struct symbol **sym);
 922 char *get_param_name_var_sym(const char *name, struct symbol *sym);
 923 char *get_param_name(struct sm_state *sm);
 924 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
 925 const char *get_mtag_name_expr(struct expression *expr);
 926 char *get_data_info_name(struct expression *expr);
 927 char *sm_to_arg_name(struct expression *expr, struct sm_state *sm);
 928 int is_recursive_member(const char *param_name);
 929
 930 char *escape_newlines(const char *str);
 931 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 932
 933 #define sql_helper(db, call_back, data, sql...)                                 \
 934 do {                                                                            \
 935         char sql_txt[1024];                                                     \
 936                                                                                 \
 937         sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql);                        \
 938         db_debug("debug: %s\n", sql_txt);                                       \
 939         sql_exec(db, call_back, data, sql_txt);                                 \
 940 } while (0)
 941
 942
 943 #define run_sql(call_back, data, sql...)                                        \
 944 do {                                                                            \
 945         if (option_no_db)                                                       \
 946                 break;                                                          \
 947         sql_helper(smatch_db, call_back, data, sql);                            \
 948 } while (0)
 949
 950 #define mem_sql(call_back, data, sql...)                                        \
 951         sql_helper(mem_db, call_back, data, sql)
 952
 953 #define cache_sql(call_back, data, sql...)                                      \
 954         sql_helper(cache_db, call_back, data, sql)
 955
 956 #define sql_insert_helper(table, db, ignore, late, values...)                   \
 957 do {                                                                            \
 958         struct sqlite3 *_db = db;                                               \
 959                                                                                 \
 960         if (__inline_fn && !_db)                                                \
 961                 _db = mem_db;                                                   \
 962         if (_db) {                                                              \
 963                 char buf[1024];                                                 \
 964                 char *err, *p = buf;                                            \
 965                 int rc;                                                         \
 966                                                                                 \
 967                 p += snprintf(p, buf + sizeof(buf) - p,                         \
 968                               "insert %sinto %s values (",                      \
 969                               ignore ? "or ignore " : "", #table);              \
 970                 p += snprintf(p, buf + sizeof(buf) - p, values);                \
 971                 p += snprintf(p, buf + sizeof(buf) - p, ");");                  \
 972                 db_debug("mem-db: %s\n", buf);                                  \
 973                 rc = sqlite3_exec(_db, buf, NULL, NULL, &err);                  \
 974                 if (rc != SQLITE_OK) {                                          \
 975                         sm_ierror("SQL error #2: %s", err);                     \
 976                         sm_ierror("SQL: '%s'", buf);                            \
 977                         parse_error = 1;                                        \
 978                 }                                                               \
 979                 break;                                                          \
 980         }                                                                       \
 981         if (option_info) {                                                      \
 982                 FILE *tmp_fd = sm_outfd;                                        \
 983                 sm_outfd = sql_outfd;                                           \
 984                 sm_prefix();                                                    \
 985                 sm_printf("SQL%s: insert %sinto " #table " values(",            \
 986                           late ? "_late" : "", ignore ? "or ignore " : "");     \
 987                 sm_printf(values);                                              \
 988                 sm_printf(");\n");                                              \
 989                 sm_outfd = tmp_fd;                                              \
 990         }                                                                       \
 991 } while (0)
 992
 993 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, 0, values);
 994 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 0, 1, 0, values);
 995 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 0, 1, values);
 996 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
 997
 998 char *get_static_filter(struct symbol *sym);
 999
1000 void sql_insert_return_states(int return_id, const char *return_ranges,
1001                 int type, int param, const char *key, const char *value);
1002 void sql_insert_caller_info(struct expression *call, int type, int param,
1003                 const char *key, const char *value);
1004 void sql_insert_function_ptr(const char *fn, const char *struct_name);
1005 void sql_insert_return_values(const char *return_values);
1006 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
1007 void sql_insert_function_type_size(const char *member, const char *ranges);
1008 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
1009 void sql_insert_type_info(int type, const char *member, const char *value);
1010 void sql_insert_local_values(const char *name, const char *value);
1011 void sql_insert_function_type_value(const char *type, const char *value);
1012 void sql_insert_function_type(int param, const char *value);
1013 void sql_insert_parameter_name(int param, const char *value);
1014 void sql_insert_data_info(struct expression *data, int type, const char *value);
1015 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
1016 void sql_save_constraint(const char *con);
1017 void sql_save_constraint_required(const char *data, int op, const char *limit);
1018 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
1019 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
1020 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
1021 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);
1022 void sql_insert_mtag_info(mtag_t tag, int type, const char *value);
1023 void sql_insert_mtag_map(mtag_t container, int container_offset, mtag_t tag, int tag_offset);
1024 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
1025 int mtag_map_select_container(mtag_t tag, int container_offset, mtag_t *container);
1026 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);
1027 struct smatch_state *get_mtag_return(struct expression *expr, struct smatch_state *state);
1028 struct range_list *swap_mtag_seed(struct expression *expr, struct range_list *rl);
1029
1030 bool is_fn_ptr(struct expression *fn);
1031 void sql_select_return_states(const char *cols, struct expression *call,
1032         int (*callback)(void*, int, char**, char**), void *info);
1033 void sql_select_call_implies(const char *cols, struct expression *call,
1034         int (*callback)(void*, int, char**, char**));
1035
1036 void open_smatch_db(char *db_file);
1037
1038 /* smatch_files.c */
1039 int open_data_file(const char *filename);
1040 int open_schema_file(const char *schema);
1041 struct token *get_tokens_file(const char *filename);
1042 struct string_list *load_strings_from_file(const char *project, const char *filename);
1043
1044 /* smatch.c */
1045 extern char *option_debug_check;
1046 extern char *option_debug_var;
1047 extern char *option_project_str;
1048 extern char *bin_dir;
1049 extern char *data_dir;
1050 extern int option_no_data;
1051 extern int option_full_path;
1052 extern int option_call_tree;
1053 extern int num_checks;
1054
1055 enum project_type {
1056         PROJ_NONE,
1057         PROJ_KERNEL,
1058         PROJ_WINE,
1059         PROJ_ILLUMOS_KERNEL,
1060         PROJ_ILLUMOS_USER,
1061         PROJ_UNKNOWN,
1062 };
1063 extern enum project_type option_project;
1064 const char *check_name(unsigned short id);
1065 int id_from_name(const char *name);
1066
1067
1068 /* smatch_buf_size.c */
1069 int get_array_size(struct expression *expr);
1070 int get_array_size_bytes(struct expression *expr);
1071 int get_array_size_bytes_min(struct expression *expr);
1072 int get_array_size_bytes_max(struct expression *expr);
1073 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1074 int get_real_array_size(struct expression *expr);
1075 int last_member_is_resizable(struct symbol *type);
1076 /* smatch_strlen.c */
1077 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1078 int get_size_from_strlen(struct expression *expr);
1079
1080 /* smatch_capped.c */
1081 int is_capped(struct expression *expr);
1082 int is_capped_var_sym(const char *name, struct symbol *sym);
1083
1084 /* smatch_kernel_user_data.c */
1085 int is_user_macro(struct expression *expr);
1086 int is_capped_user_data(struct expression *expr);
1087 int implied_user_data(struct expression *expr, struct range_list **rl);
1088 struct stree *get_user_stree(void);
1089 int get_user_rl(struct expression *expr, struct range_list **rl);
1090 int is_user_rl(struct expression *expr);
1091 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1092 bool user_rl_capped(struct expression *expr);
1093 struct range_list *var_user_rl(struct expression *expr);
1094 bool we_pass_user_data(struct expression *call);
1095 /* smatch_points_to_user_data.c */
1096 bool is_user_data_fn(struct symbol *fn);
1097 bool is_skb_data(struct expression *expr);
1098 bool points_to_user_data(struct expression *expr);
1099 void set_points_to_user_data(struct expression *expr);
1100
1101 /* check_locking.c */
1102 void print_held_locks();
1103
1104 /* check_assigned_expr.c */
1105 extern int check_assigned_expr_id;
1106 struct expression *get_assigned_expr(struct expression *expr);
1107 struct sm_state *get_assigned_sm(struct expression *expr);
1108 struct expression *get_assigned_expr_recurse(struct expression *expr);
1109 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1110 struct expression *get_assigned_expr_name_sym_recurse(const char *name, struct symbol *sym);
1111
1112 /* smatch_return_to_param.c */
1113 void __add_return_to_param_mapping(struct expression *assign, const char *return_string);
1114 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1115
1116 /* smatch_comparison.c */
1117 extern int comparison_id;
1118 #define UNKNOWN_COMPARISON 0
1119 #define IMPOSSIBLE_COMPARISON -1
1120 struct compare_data {
1121         /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1122         struct expression *left;
1123         const char *left_var;
1124         struct var_sym_list *left_vsl;
1125         int comparison;
1126         struct expression *right;
1127         const char *right_var;
1128         struct var_sym_list *right_vsl;
1129 };
1130 DECLARE_ALLOCATOR(compare_data);
1131 struct smatch_state *alloc_compare_state(
1132                 struct expression *left,
1133                 const char *left_var, struct var_sym_list *left_vsl,
1134                 int comparison,
1135                 struct expression *right,
1136                 const char *right_var, struct var_sym_list *right_vsl);
1137 int comparison_intersection(int orig, int op);
1138 int merge_comparisons(int one, int two);
1139 int combine_comparisons(int left_compare, int right_compare);
1140 int state_to_comparison(struct smatch_state *state);
1141 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1142 int get_comparison(struct expression *left, struct expression *right);
1143 int get_comparison_no_extra(struct expression *a, struct expression *b);
1144 int get_comparison_strings(const char *one, const char *two);
1145 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1146 struct state_list *get_all_comparisons(struct expression *expr);
1147 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1148 void __add_return_comparison(struct expression *call, const char *range);
1149 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1150 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1151 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1152 char *expr_equal_to_param(struct expression *expr, int ignore);
1153 char *expr_lte_to_param(struct expression *expr, int ignore);
1154 char *expr_param_comparison(struct expression *expr, int ignore);
1155 int flip_comparison(int op);
1156 int negate_comparison(int op);
1157 int remove_unsigned_from_comparison(int op);
1158 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1159 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1160 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,
1161                                 const char *state_name,
1162                                 struct smatch_state *true_state, struct smatch_state *false_state);
1163 int impossibly_high_comparison(struct expression *expr);
1164
1165 /* smatch_sval.c */
1166 sval_t *sval_alloc(sval_t sval);
1167 sval_t *sval_alloc_permanent(sval_t sval);
1168 sval_t sval_blank(struct expression *expr);
1169 sval_t sval_type_val(struct symbol *type, long long val);
1170 sval_t sval_type_fval(struct symbol *type, long double fval);
1171 sval_t sval_from_val(struct expression *expr, long long val);
1172 sval_t sval_from_fval(struct expression *expr, long double fval);
1173 int sval_is_ptr(sval_t sval);
1174 bool sval_is_fp(sval_t sval);
1175 int sval_unsigned(sval_t sval);
1176 int sval_signed(sval_t sval);
1177 int sval_bits(sval_t sval);
1178 int sval_bits_used(sval_t sval);
1179 int sval_is_negative(sval_t sval);
1180 int sval_is_positive(sval_t sval);
1181 int sval_is_min(sval_t sval);
1182 int sval_is_max(sval_t sval);
1183 int sval_is_a_min(sval_t sval);
1184 int sval_is_a_max(sval_t sval);
1185 int sval_is_negative_min(sval_t sval);
1186 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1187 int sval_cmp_val(sval_t one, long long val);
1188 sval_t sval_min(sval_t one, sval_t two);
1189 sval_t sval_min_nonneg(sval_t one, sval_t two);
1190 sval_t sval_max(sval_t one, sval_t two);
1191 int sval_too_low(struct symbol *type, sval_t sval);
1192 int sval_too_high(struct symbol *type, sval_t sval);
1193 int sval_fits(struct symbol *type, sval_t sval);
1194 sval_t sval_cast(struct symbol *type, sval_t sval);
1195 sval_t sval_preop(sval_t sval, int op);
1196 sval_t sval_binop(sval_t left, int op, sval_t right);
1197 int sval_binop_overflows(sval_t left, int op, sval_t right);
1198 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);
1199 int find_first_zero_bit(unsigned long long uvalue);
1200 int sm_fls64(unsigned long long uvalue);
1201 unsigned long long fls_mask(unsigned long long uvalue);
1202 unsigned long long sval_fls_mask(sval_t sval);
1203 const char *sval_to_str(sval_t sval);
1204 const char *sval_to_str_or_err_ptr(sval_t sval);
1205 const char *sval_to_numstr(sval_t sval);
1206 sval_t ll_to_sval(long long val);
1207
1208 /* smatch_string_list.c */
1209 int list_has_string(struct string_list *str_list, const char *str);
1210 int insert_string(struct string_list **str_list, const char *str);
1211 struct string_list *clone_str_list(struct string_list *orig);
1212 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1213
1214 /* smatch_start_states.c */
1215 struct stree *get_start_states(void);
1216
1217 /* smatch_recurse.c */
1218 int has_symbol(struct expression *expr, struct symbol *sym);
1219 int has_variable(struct expression *expr, struct expression *var);
1220 int has_inc_dec(struct expression *expr);
1221
1222 /* smatch_stored_conditions.c */
1223 struct smatch_state *get_stored_condition(struct expression *expr);
1224 struct expression_list *get_conditions(struct expression *expr);
1225 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1226                         struct state_list **true_stack,
1227                         struct state_list **false_stack);
1228 /* smatch_parsed_conditions.c */
1229 struct sm_state *parsed_condition_implication_hook(struct expression *expr,
1230                         struct state_list **true_stack,
1231                         struct state_list **false_stack);
1232 /* smatch_comparison.c */
1233 struct sm_state *comparison_implication_hook(struct expression *expr,
1234                                              struct state_list **true_stack,
1235                                              struct state_list **false_stack);
1236
1237 /* check_string_len.c */
1238 int get_formatted_string_size(struct expression *call, int arg);
1239 int get_formatted_string_min_size(struct expression *call, int arg);
1240
1241 /* smatch_param_set.c */
1242 int param_was_set(struct expression *expr);
1243 int param_was_set_var_sym(const char *name, struct symbol *sym);
1244 void print_limited_param_set(int return_id, char *return_ranges, struct expression *expr);
1245 /* param_clear */
1246 bool parent_was_PARAM_CLEAR(const char *name, struct symbol *sym);
1247 bool parent_was_PARAM_CLEAR_ZERO(const char *name, struct symbol *sym);
1248
1249 /* smatch_param_filter.c */
1250 int param_has_filter_data(struct sm_state *sm);
1251
1252 /* smatch_links.c */
1253 void set_up_link_functions(int id, int linkid);
1254 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1255 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1256
1257 /* check_buf_comparison */
1258 const char *limit_type_str(unsigned int limit_type);
1259 struct expression *get_size_variable(struct expression *buf, int *limit_type);
1260 struct expression *get_array_variable(struct expression *size);
1261 int buf_comparison_index_ok(struct expression *expr);
1262
1263 /* smatch_untracked_param.c */
1264 void mark_untracked(struct expression *expr, int param, const char *key, const char *value);
1265 void add_untracked_param_hook(void (func)(struct expression *call, int param));
1266 void add_lost_param_hook(void (func)(struct expression *call, int param));
1267 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1268
1269 /* smatch_strings.c */
1270 struct state_list *get_strings(struct expression *expr);
1271 struct expression *fake_string_from_mtag(mtag_t tag);
1272
1273 /* smatch_estate.c */
1274 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1275
1276 /* smatch_address.c */
1277 int get_address_rl(struct expression *expr, struct range_list **rl);
1278 int get_member_offset(struct symbol *type, const char *member_name);
1279 int get_member_offset_from_deref(struct expression *expr);
1280
1281 /* for now this is in smatch_used_parameter.c */
1282 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1283 extern int __ignore_param_used;
1284
1285 /* smatch_buf_comparison.c */
1286 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1287
1288 struct range_list *get_fs(void);
1289
1290 struct stree *get_all_return_states(void);
1291 struct stree_stack *get_all_return_strees(void);
1292 int on_atomic_dec_path(void);
1293 int was_inced(const char *name, struct symbol *sym);
1294 void set_refcount_inc(char *name, struct symbol *sym);
1295 void set_refcount_dec(char *name, struct symbol *sym);
1296
1297 /* smatch_constraints.c */
1298 char *get_constraint_str(struct expression *expr);
1299 struct constraint_list *get_constraints(struct expression *expr);
1300 char *unmet_constraint(struct expression *data, struct expression *offset);
1301 char *get_required_constraint(const char *data_str);
1302
1303 /* smatch_container_of.c */
1304 int get_param_from_container_of(struct expression *expr);
1305 int get_offset_from_container_of(struct expression *expr);
1306 char *get_container_name(struct expression *container, struct expression *expr);
1307
1308 /* smatch_mtag.c */
1309 mtag_t str_to_mtag(const char *str);
1310 int get_string_mtag(struct expression *expr, mtag_t *tag);
1311 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);
1312 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1313 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1314 void update_mtag_data(struct expression *expr, struct smatch_state *state);
1315 int get_mtag_sval(struct expression *expr, sval_t *sval);
1316
1317 /* Trinity fuzzer stuff */
1318 const char *get_syscall_arg_type(struct symbol *sym);
1319
1320 /* smatch_bits.c */
1321 int binfo_equiv(struct bit_info *one, struct bit_info *two);
1322 struct bit_info *alloc_bit_info(unsigned long long set, unsigned long long possible);
1323 struct smatch_state *alloc_bstate(unsigned long long set, unsigned long long possible);
1324 struct smatch_state *merge_bstates(struct smatch_state *one_state, struct smatch_state *two_state);
1325
1326 /* smatch_param_bits_set.c */
1327 void __set_param_modified_helper(struct expression *expr, struct  smatch_state *state);
1328 void __set_param_modified_helper_sym(const char *name, struct symbol *sym,
1329                                      struct smatch_state *state);
1330
1331 /* smatch_param_bits_clear.c */
1332 void __set_param_modified_helper_clear(struct expression *expr, struct smatch_state *state);
1333 void __set_param_modified_helper_sym_clear(const char *name, struct symbol *sym,
1334                                            struct smatch_state *state);
1335
1336 /* smatch_bit_info.c */
1337 struct bit_info *rl_to_binfo(struct range_list *rl);
1338 struct bit_info *get_bit_info(struct expression *expr);
1339 struct bit_info *get_bit_info_var_sym(const char *name, struct symbol *sym);
1340
1341 /* smatch_mem_tracker.c */
1342 extern int option_mem;
1343 unsigned long get_mem_kb(void);
1344 unsigned long get_max_memory(void);
1345
1346 /* check_is_nospec.c */
1347 bool is_nospec(struct expression *expr);
1348 long get_stmt_cnt(void);
1349
1350 /* smatch_nul_terminator.c */
1351 bool is_nul_terminated_var_sym(const char *name, struct symbol *sym);
1352 bool is_nul_terminated(struct expression *expr);
1353 /* check_kernel.c  */
1354 bool is_ignored_kernel_data(const char *name);
1355 int get_gfp_param(struct expression *expr);
1356
1357 bool is_fresh_alloc_var_sym(const char *var, struct symbol *sym);
1358 bool is_fresh_alloc(struct expression *expr);
1359 bool is_freed_var_sym(const char *name, struct symbol *sym);
1360 void track_freed_param(struct expression *expr, struct smatch_state *state);
1361 void track_freed_param_var_sym(const char *name, struct symbol *sym,
1362                                struct smatch_state *state);
1363
1364 static inline bool type_is_ptr(struct symbol *type)
1365 {
1366         return type &&
1367                (type->type == SYM_PTR ||
1368                 type->type == SYM_ARRAY ||
1369                 type->type == SYM_FN);
1370 }
1371
1372 static inline bool type_is_fp(struct symbol *type)
1373 {
1374         return type &&
1375                (type == &float_ctype ||
1376                 type == &double_ctype ||
1377                 type == &ldouble_ctype);
1378 }
1379
1380 static inline int type_bits(struct symbol *type)
1381 {
1382         if (!type)
1383                 return 0;
1384         if (type_is_ptr(type))
1385                 return bits_in_pointer;
1386         if (!type->examined)
1387                 examine_symbol_type(type);
1388         return type->bit_size;
1389 }
1390
1391 static inline int type_unsigned(struct symbol *base_type)
1392 {
1393         if (!base_type)
1394                 return 0;
1395         if (is_ptr_type(base_type))
1396                 return 1;
1397         if (base_type->ctype.modifiers & MOD_UNSIGNED)
1398                 return 1;
1399         return 0;
1400 }
1401
1402 static inline int type_positive_bits(struct symbol *type)
1403 {
1404         if (!type)
1405                 return 0;
1406         if (is_ptr_type(type))
1407                 return bits_in_pointer;
1408         if (type_unsigned(type))
1409                 return type_bits(type);
1410         return type_bits(type) - 1;
1411 }
1412
1413 static inline int sval_positive_bits(sval_t sval)
1414 {
1415         return type_positive_bits(sval.type);
1416 }
1417
1418 /*
1419  * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1420  */
1421
1422 static inline int fp_cmp(sval_t one, sval_t two)
1423 {
1424         struct symbol *type;
1425
1426         if (sval_is_fp(one) && sval_is_fp(two))
1427                 type = type_bits(one.type) > type_bits(two.type) ? one.type : two.type;
1428         else if (sval_is_fp(one))
1429                 type = one.type;
1430         else
1431                 type = two.type;
1432
1433         one = sval_cast(type, one);
1434         two = sval_cast(type, two);
1435
1436         if (one.type == &float_ctype) {
1437                 if (one.fvalue < two.fvalue)
1438                         return -1;
1439                 if (one.fvalue == two.fvalue)
1440                         return 0;
1441                 return 1;
1442         }
1443         if (one.type == &double_ctype) {
1444                 if (one.dvalue < two.dvalue)
1445                         return -1;
1446                 if (one.dvalue == two.dvalue)
1447                         return 0;
1448                 return 1;
1449         }
1450         if (one.type == &ldouble_ctype) {
1451                 if (one.ldvalue < two.ldvalue)
1452                         return -1;
1453                 if (one.ldvalue == two.ldvalue)
1454                         return 0;
1455                 return 1;
1456         }
1457         sm_perror("bad type in fp_cmp(): %s", type_to_str(type));
1458         return 1;
1459 }
1460
1461 static inline int sval_cmp(sval_t one, sval_t two)
1462 {
1463         struct symbol *type;
1464
1465         if (sval_is_fp(one) || sval_is_fp(two))
1466                 return fp_cmp(one, two);
1467
1468         type = one.type;
1469         if (sval_positive_bits(two) > sval_positive_bits(one))
1470                 type = two.type;
1471         if (type_bits(type) < 31)
1472                 type = &int_ctype;
1473
1474         one = sval_cast(type, one);
1475         two = sval_cast(type, two);
1476
1477         if (type_unsigned(type)) {
1478                 if (one.uvalue < two.uvalue)
1479                         return -1;
1480                 if (one.uvalue == two.uvalue)
1481                         return 0;
1482                 return 1;
1483         }
1484         /* fix me handle type promotion and unsigned values */
1485         if (one.value < two.value)
1486                 return -1;
1487         if (one.value == two.value)
1488                 return 0;
1489         return 1;
1490 }
1491
1492 #endif      /* !SMATCH_H_ */