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