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