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 *size_str;
 178         struct expression *total_size;
 179         struct expression *nr_elems;
 180         struct expression *elem_size;
 181         long min, max;
 182         bool zeroed;
 183         bool safe;  /* safe from overflows */
 184 };
 185 typedef void (alloc_hook)(struct expression *expr, const char *name, struct symbol *sym, struct allocation_info *info);
 186 void add_allocation_hook(alloc_hook *func);
 187
 188 void add_hook(void *func, enum hook_type type);
 189 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 190 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 191 void add_merge_hook(int client_id, merge_func_t *func);
 192 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 193 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *cur, struct sm_state *other));
 194 typedef void (scope_hook)(void *data);
 195 void add_scope_hook(scope_hook *hook, void *data);
 196 void add_return_string_hook(string_hook *fn);
 197 typedef void (param_key_hook)(struct expression *expr, const char *name, struct symbol *sym, void *data);
 198 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 199 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 200                                 struct expression *assign_expr, void *data);
 201 typedef void (return_implies_hook)(struct expression *call_expr,
 202                                    int param, char *key, char *value);
 203 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 204 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 205 void add_function_hook_late(const char *look_for, func_hook *call_back, void *info);
 206
 207 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 208                               void *info);
 209 void register_func_hooks_from_file(const char *file,
 210                                    func_hook *call_back, void *info);
 211 void register_assign_hooks_from_file(const char *file,
 212                                      func_hook *call_back, void *info);
 213 void add_implied_return_hook(const char *look_for,
 214                              implied_return_hook *call_back,
 215                              void *info);
 216 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 217                               void *info);
 218 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 219                               void *info);
 220 void return_implies_state(const char *look_for, long long start, long long end,
 221                          implication_hook *call_back, void *info);
 222 void return_implies_state_sval(const char *look_for, sval_t start, sval_t end,
 223                          implication_hook *call_back, void *info);
 224 void return_implies_exact(const char *look_for, sval_t start, sval_t end,
 225                           implication_hook *call_back, void *info);
 226 struct range_list *get_range_implications(const char *fn);
 227 void select_return_states_hook(int type, return_implies_hook *callback);
 228 void select_return_states_before(void (*fn)(void));
 229 void select_return_states_after(void (*fn)(void));
 230 void add_function_param_key_hook(const char *look_for, param_key_hook *call_back,
 231                                  int param, const char *key, void *info);
 232 void add_function_param_key_hook_late(const char *look_for, param_key_hook *call_back,
 233                                       int param, const char *key, void *info);
 234 void return_implies_param_key(const char *look_for, sval_t start, sval_t end,
 235                               param_key_hook *call_back,
 236                               int param, const char *key, void *info);
 237 void return_implies_param_key_exact(const char *look_for, sval_t start, sval_t end,
 238                                     param_key_hook *call_back,
 239                                     int param, const char *key, void *info);
 240 void select_return_param_key(int type, param_key_hook *callback);
 241 bool get_implied_return(struct expression *expr, struct range_list **rl);
 242 void allocate_hook_memory(void);
 243 void allocate_tracker_array(int num_checks);
 244
 245 struct modification_data {
 246         struct smatch_state *prev;
 247         struct expression *cur;
 248 };
 249
 250 void allocate_modification_hooks(void);
 251 bool is_sub_member(const char *name, struct symbol *sym, struct sm_state *sm);
 252 void add_all_modifications_hook(int owner, name_sym_hook *hook);
 253 void add_modification_hook(int owner, sm_hook *call_back);
 254 void add_modification_hook_late(int owner, sm_hook *call_back);
 255 struct smatch_state *get_modification_state(struct expression *expr);
 256
 257 int outside_of_function(void);
 258 const char *get_filename(void);
 259 extern int base_file_stream;
 260 const char *get_base_file(void);
 261 char *get_function(void);
 262 int get_lineno(void);
 263 extern int final_pass;
 264 extern struct symbol *cur_func_sym;
 265 extern int option_debug;
 266 extern int local_debug;
 267 extern int debug_db;
 268 extern bool implied_debug;
 269 bool debug_implied(void);
 270 bool debug_on(const char *check_name, const char *var);
 271 extern int option_info;
 272 extern int option_spammy;
 273 extern int option_pedantic;
 274 extern int option_print_names;
 275 extern char *trace_variable;
 276 extern struct stree *global_states;
 277 void set_function_skipped(void);
 278 int is_skipped_function(void);
 279 int is_silenced_function(void);
 280 extern bool implications_off;
 281
 282 /* smatch_impossible.c */
 283 int is_impossible_path(void);
 284 void set_true_path_impossible(void);
 285 void set_false_path_impossible(void);
 286 void set_path_impossible(void);
 287
 288 extern FILE *sm_outfd;
 289 extern FILE *sql_outfd;
 290 extern FILE *caller_info_fd;
 291 extern int sm_nr_checks;
 292 extern int sm_nr_errors;
 293
 294 /*
 295  * How to use these routines:
 296  *
 297  * sm_fatal(): an internal error of some kind that should immediately exit
 298  * sm_ierror(): an internal error
 299  * sm_perror(): an internal error from parsing input source
 300  * sm_error(): an error from input source
 301  * sm_warning(): a warning from input source
 302  * sm_info(): info message (from option_info)
 303  * sm_debug(): debug message
 304  * sm_msg(): other message (please avoid using this)
 305  */
 306
 307 #define sm_printf(msg...) do {                                          \
 308         if (final_pass || option_debug || local_debug || debug_db)      \
 309                 fprintf(sm_outfd, msg);                                 \
 310 } while (0)
 311
 312 static inline void sm_prefix(void)
 313 {
 314         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 315         if (option_info || !option_print_names)
 316                 return;
 317         sm_printf("[smatch.%s] ", __CHECKNAME__);
 318 }
 319
 320 static inline void print_implied_debug_msg();
 321
 322 extern bool __silence_warnings_for_stmt;
 323
 324 #define sm_print_msg(type, msg...) \
 325 do {                                                           \
 326         print_implied_debug_msg();                             \
 327         if (!final_pass && !option_debug && !local_debug && !debug_db)    \
 328                 break;                                         \
 329         if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
 330                 break;                                         \
 331         if (!option_info && is_silenced_function())            \
 332                 break;                                         \
 333         sm_prefix();                                           \
 334         if (type == 1) {                                       \
 335                 sm_printf("warn: ");                           \
 336                 sm_nr_checks++;                                \
 337         } else if (type == 2) {                                \
 338                 sm_printf("error: ");                          \
 339                 sm_nr_checks++;                                \
 340         } else if (type == 3) {                                \
 341                 sm_printf("parse error: ");                    \
 342                 sm_nr_errors++;                                \
 343         } else if (type == 4) {                                \
 344                 sm_printf("pedantic: ");                       \
 345         }                                                      \
 346         sm_printf(msg);                                        \
 347         sm_printf("\n");                                       \
 348 } while (0)
 349
 350 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
 351
 352 extern char *implied_debug_msg;
 353 static inline void print_implied_debug_msg(void)
 354 {
 355         static struct symbol *last_printed = NULL;
 356
 357         if (!implied_debug_msg)
 358                 return;
 359         if (last_printed == cur_func_sym)
 360                 return;
 361         last_printed = cur_func_sym;
 362         sm_msg("%s", implied_debug_msg);
 363 }
 364
 365 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 366 #define db_debug(msg...) do { if (option_debug || debug_db) sm_printf(msg); } while (0)
 367
 368 #define sm_info(msg...) do {                                    \
 369         if (option_debug || (option_info && final_pass)) {      \
 370                 sm_prefix();                                    \
 371                 sm_printf("info: ");                            \
 372                 sm_printf(msg);                                 \
 373                 sm_printf("\n");                                \
 374         }                                                       \
 375 } while(0)
 376
 377 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
 378 #define sm_warning_line(line, msg...) do {      \
 379         int __orig = __smatch_lineno;           \
 380         __smatch_lineno = line;                 \
 381         sm_print_msg(1, msg);                   \
 382         __smatch_lineno = __orig;               \
 383 } while (0)
 384 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
 385 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
 386 #define sm_pedantic(msg...) do { if (option_pedantic) sm_print_msg(4, msg); } while (0)
 387
 388 static inline void sm_fatal(const char *fmt, ...)
 389 {
 390         va_list args;
 391
 392         va_start(args, fmt);
 393         vfprintf(sm_outfd, fmt, args);
 394         va_end(args);
 395
 396         fprintf(sm_outfd, "\n");
 397
 398         exit(1);
 399 }
 400
 401 static inline void sm_ierror(const char *fmt, ...)
 402 {
 403         va_list args;
 404
 405         sm_nr_errors++;
 406
 407         fprintf(sm_outfd, "internal error: ");
 408
 409         va_start(args, fmt);
 410         vfprintf(sm_outfd, fmt, args);
 411         va_end(args);
 412
 413         fprintf(sm_outfd, "\n");
 414 }
 415 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
 416
 417 bool has_states(struct stree *stree, int owner);
 418 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym);
 419 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 420 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 421 bool has_possible_state(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 422 bool expr_has_possible_state(int owner, struct expression *expr, struct smatch_state *state);
 423 struct state_list *get_possible_states(int owner, const char *name,
 424                                        struct symbol *sym);
 425 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 426 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 427                struct smatch_state *state);
 428 struct sm_state *set_state_expr(int owner, struct expression *expr,
 429                 struct smatch_state *state);
 430 void __delete_state(int owner, const char *name, struct symbol *sym);
 431 void __delete_all_states_sym(struct symbol *sym);
 432 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 433                            struct smatch_state *true_state,
 434                            struct smatch_state *false_state);
 435 void set_true_false_states_expr(int owner, struct expression *expr,
 436                            struct smatch_state *true_state,
 437                            struct smatch_state *false_state);
 438
 439 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 440 struct stree *get_all_states_stree(int id);
 441 struct stree *__get_cur_stree(void);
 442 int is_reachable(void);
 443 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
 444
 445 /* smatch_ssa.c */
 446 char *ssa_name(const char *name);
 447 void set_ssa_state(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 448 void update_ssa_state(int owner, const char *name, struct symbol *sym,
 449                       struct smatch_state *state);
 450 void update_ssa_sm(int owner, struct sm_state *sm, struct smatch_state *state);
 451 void set_ssa_state_expr(int owner, struct expression *expr, struct smatch_state *state);
 452 struct sm_state *get_ssa_sm_state(int owner, const char *name, struct symbol *sym);
 453 struct sm_state *get_ssa_sm_state_expr(int owner, struct expression *expr);
 454 struct smatch_state *get_ssa_state(int owner, const char *name, struct symbol *sym);
 455 struct smatch_state *get_ssa_state_expr(int owner, struct expression *expr);
 456
 457 /* smatch_helper.c */
 458 DECLARE_PTR_LIST(int_stack, int);
 459 char *alloc_string(const char *str);
 460 char *alloc_string_newline(const char *str);
 461 void free_string(char *str);
 462 void remove_parens(char *str);
 463 struct smatch_state *alloc_state_num(int num);
 464 struct smatch_state *alloc_state_str(const char *name);
 465 struct smatch_state *merge_str_state(struct smatch_state *s1, struct smatch_state *s2);
 466 struct smatch_state *alloc_state_expr(struct expression *expr);
 467 struct expression *get_argument_from_call_expr(struct expression_list *args,
 468                                                int num);
 469 struct expression *get_array_expr(struct expression *expr);
 470
 471 char *expr_to_var(struct expression *expr);
 472 struct symbol *expr_to_sym(struct expression *expr);
 473 char *expr_to_str(struct expression *expr);
 474 char *expr_to_str_sym(struct expression *expr,
 475                                      struct symbol **sym_ptr);
 476 char *expr_to_var_sym(struct expression *expr,
 477                              struct symbol **sym_ptr);
 478 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
 479 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
 480 int get_complication_score(struct expression *expr);
 481
 482 int sym_name_is(const char *name, struct expression *expr);
 483 int get_const_value(struct expression *expr, sval_t *sval);
 484 int get_value(struct expression *expr, sval_t *val);
 485 int get_implied_value(struct expression *expr, sval_t *val);
 486 int get_implied_value_fast(struct expression *expr, sval_t *sval);
 487 int get_implied_min(struct expression *expr, sval_t *sval);
 488 int get_implied_max(struct expression *expr, sval_t *val);
 489 int get_hard_max(struct expression *expr, sval_t *sval);
 490 int get_fuzzy_min(struct expression *expr, sval_t *min);
 491 int get_fuzzy_max(struct expression *expr, sval_t *max);
 492 int get_absolute_min(struct expression *expr, sval_t *sval);
 493 int get_absolute_max(struct expression *expr, sval_t *sval);
 494 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 495 int parse_call_math_rl(struct expression *call, const char *math, struct range_list **rl);
 496 const char *get_allocation_math(struct expression *expr);
 497 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 498 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 499 int expr_is_zero(struct expression *expr);
 500 int known_condition_true(struct expression *expr);
 501 int known_condition_false(struct expression *expr);
 502 int implied_condition_true(struct expression *expr);
 503 int implied_condition_false(struct expression *expr);
 504 int can_integer_overflow(struct symbol *type, struct expression *expr);
 505 void clear_math_cache(void);
 506 void set_fast_math_only(void);
 507 void clear_fast_math_only(void);
 508
 509 int is_array(struct expression *expr);
 510 struct expression *get_array_base(struct expression *expr);
 511 struct expression *get_array_offset(struct expression *expr);
 512 const char *show_state(struct smatch_state *state);
 513 struct statement *get_expression_statement(struct expression *expr);
 514 struct expression *strip_parens(struct expression *expr);
 515 struct expression *strip_expr(struct expression *expr);
 516 struct expression *strip_no_cast(struct expression *expr);
 517 struct expression *strip_expr_set_parent(struct expression *expr);
 518 void scoped_state(int my_id, const char *name, struct symbol *sym);
 519 int is_error_return(struct expression *expr);
 520 int getting_address(struct expression *expr);
 521 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
 522 char *get_member_name(struct expression *expr);
 523 char *get_fnptr_name(struct expression *expr);
 524 int cmp_pos(struct position pos1, struct position pos2);
 525 int positions_eq(struct position pos1, struct position pos2);
 526 struct statement *get_current_statement(void);
 527 struct statement *get_prev_statement(void);
 528 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
 529
 530 enum { RET_SUCCESS, RET_FAIL, RET_UNKNOWN };
 531 int success_fail_return(struct range_list *rl);
 532
 533 #define RETURN_VAR    -1
 534 #define LOCAL_SCOPE   -2
 535 #define FILE_SCOPE    -3
 536 #define GLOBAL_SCOPE  -4
 537 #define UNKNOWN_SCOPE -5
 538
 539 char *swap_names(const char *orig, const char *remove, const char *add);
 540 char *get_param_var_sym_var_sym(const char *name, struct symbol *sym, struct expression *ret_expr, struct symbol **sym_p);
 541 char *get_param_name_sym(struct expression *expr, struct symbol **sym_p);
 542 int get_param_key_from_var_sym(const char *name, struct symbol *sym,
 543                                struct expression *ret_expr,
 544                                const char **key);
 545 int get_param_key_from_sm(struct sm_state *sm, struct expression *ret_expr,
 546                           const char **key);
 547 int get_param_key_from_expr(struct expression *expr, struct expression *ret_expr,
 548                             const char **key);
 549 int map_to_param(const char *name, struct symbol *sym);
 550 int get_param_num_from_sym(struct symbol *sym);
 551 int get_param_num(struct expression *expr);
 552 struct symbol *get_param_sym_from_num(int num);
 553 struct expression *map_container_of_to_simpler_expr_key(struct expression *expr, const char *orig_key, char **new_key);
 554 const char *get_container_of_str(struct expression *expr);
 555 bool get_offset_param(const char *ret_str, int *offset, int *param);
 556 /* smatch_points_to_container.c */
 557 struct expression *get_stored_container(struct expression *expr, int offset);
 558
 559 int ms_since(struct timeval *start);
 560 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 561 int parent_is_gone(struct expression *expr);
 562 bool is_noderef_ptr(struct expression *expr);
 563 int invert_op(int op);
 564 int op_remove_assign(int op);
 565 int expr_equiv(struct expression *one, struct expression *two);
 566 void push_int(struct int_stack **stack, int num);
 567 int pop_int(struct int_stack **stack);
 568 bool macro_to_ul(const char *macro, unsigned long *val);
 569
 570 /* smatch_type.c */
 571 struct symbol *get_real_base_type(struct symbol *sym);
 572 int type_bytes(struct symbol *type);
 573 int array_bytes(struct symbol *type);
 574 struct symbol *get_pointer_type(struct expression *expr);
 575 struct symbol *get_type(struct expression *expr);
 576 struct symbol *get_comparison_type(struct expression *expr);
 577 struct symbol *get_final_type(struct expression *expr);
 578 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
 579 int type_signed(struct symbol *base_type);
 580 int expr_unsigned(struct expression *expr);
 581 int expr_signed(struct expression *expr);
 582 int returns_unsigned(struct symbol *base_type);
 583 int is_pointer(struct expression *expr);
 584 int returns_pointer(struct symbol *base_type);
 585 sval_t sval_type_max(struct symbol *base_type);
 586 sval_t sval_type_min(struct symbol *base_type);
 587 int nr_bits(struct expression *expr);
 588 int is_void_pointer(struct expression *expr);
 589 int is_char_pointer(struct expression *expr);
 590 int is_string(struct expression *expr);
 591 bool is_struct_ptr(struct symbol *type);
 592 int is_static(struct expression *expr);
 593 bool is_local_variable(struct expression *expr);
 594 int types_equiv(struct symbol *one, struct symbol *two);
 595 bool type_fits(struct symbol *type, struct symbol *test);
 596 int fn_static(void);
 597 const char *global_static();
 598 struct symbol *cur_func_return_type(void);
 599 struct symbol *get_arg_type(struct expression *fn, int arg);
 600 struct symbol *get_member_type_from_key(struct expression *expr, const char *key);
 601 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key);
 602 int is_struct(struct expression *expr);
 603 char *type_to_str(struct symbol *type);
 604
 605 /* smatch_ignore.c */
 606 void add_ignore(int owner, const char *name, struct symbol *sym);
 607 int is_ignored(int owner, const char *name, struct symbol *sym);
 608 void add_ignore_expr(int owner, struct expression *expr);
 609 int is_ignored_expr(int owner, struct expression *expr);
 610
 611 /* smatch_var_sym */
 612 struct smatch_state *alloc_var_sym_state(const char *var, struct symbol *sym);
 613 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 614 struct var_sym_list *expr_to_vsl(struct expression *expr);
 615 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 616 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 617 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 618 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 619 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 620 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 621 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 622 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two);
 623 void free_var_sym_list(struct var_sym_list **list);
 624 void free_var_syms_and_list(struct var_sym_list **list);
 625
 626 /* smatch_tracker */
 627 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 628 void add_tracker(struct tracker_list **list, int owner, const char *name,
 629                 struct symbol *sym);
 630 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 631 void del_tracker(struct tracker_list **list, int owner, const char *name,
 632                 struct symbol *sym);
 633 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 634                 struct symbol *sym);
 635 void free_tracker_list(struct tracker_list **list);
 636 void free_trackers_and_list(struct tracker_list **list);
 637
 638 /* smatch_conditions */
 639 int in_condition(void);
 640
 641 /* smatch_flow.c */
 642
 643 extern int __in_fake_assign;
 644 extern int __in_fake_parameter_assign;
 645 extern int __in_fake_struct_assign;
 646 extern int __in_fake_var_assign;
 647 extern int __fake_state_cnt;
 648 extern int in_fake_env;
 649 bool is_fake_var_assign(struct expression *expr);
 650 void smatch (struct string_list *filelist);
 651 int inside_loop(void);
 652 int definitely_inside_loop(void);
 653 struct expression *get_switch_expr(void);
 654 int in_expression_statement(void);
 655 void __process_post_op_stack(void);
 656 void __split_expr(struct expression *expr);
 657 void __split_label_stmt(struct statement *stmt);
 658 void __split_stmt(struct statement *stmt);
 659 extern int __in_function_def;
 660 extern int __in_unmatched_hook;
 661 extern int option_assume_loops;
 662 extern int option_two_passes;
 663 extern int option_no_db;
 664 extern int option_file_output;
 665 extern int option_time;
 666 extern int option_time_stmt;
 667 extern struct expression_list *big_expression_stack;
 668 extern struct expression_list *big_condition_stack;
 669 extern struct statement_list *big_statement_stack;
 670 int is_condition_call(struct expression *expr);
 671 int is_assigned_call(struct expression *expr);
 672 int is_fake_assigned_call(struct expression *expr);
 673 void add_function_data(unsigned long *fn_data);
 674 int inlinable(struct expression *expr);
 675 extern int __inline_call;
 676 extern struct expression *__inline_fn;
 677 extern int __in_pre_condition;
 678 extern int __bail_on_rest_of_function;
 679 extern struct statement *__prev_stmt;
 680 extern struct statement *__cur_stmt;
 681 extern struct statement *__next_stmt;
 682 void init_fake_env(void);
 683 void end_fake_env(void);
 684 int time_parsing_function(void);
 685 bool taking_too_long(void);
 686 struct statement *get_last_stmt(void);
 687 int is_last_stmt(struct statement *cur_stmt);
 688
 689 /* smatch_struct_assignment.c */
 690 struct expression *get_faked_expression(void);
 691 void __fake_struct_member_assignments(struct expression *expr);
 692
 693 /* smatch_project.c */
 694 int is_no_inline_function(const char *function);
 695
 696 /* smatch_conditions */
 697 void __split_whole_condition(struct expression *expr);
 698 void __handle_logic(struct expression *expr);
 699 int is_condition(struct expression *expr);
 700 int __handle_condition_assigns(struct expression *expr);
 701 int __handle_select_assigns(struct expression *expr);
 702 int __handle_expr_statement_assigns(struct expression *expr);
 703
 704 /* smatch_implied.c */
 705 struct range_list_stack;
 706 void param_limit_implications(struct expression *expr, int param, char *key, char *value, struct stree **implied);
 707 struct stree *__implied_case_stree(struct expression *switch_expr,
 708                                    struct range_list *case_rl,
 709                                    struct range_list_stack **remaining_cases,
 710                                    struct stree **raw_stree);
 711 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
 712 int assume(struct expression *expr);
 713 void end_assume(void);
 714 int impossible_assumption(struct expression *left, int op, sval_t sval);
 715
 716 /* smatch_slist.h */
 717 bool has_dynamic_states(unsigned short owner);
 718 void set_dynamic_states(unsigned short owner);
 719
 720 /* smatch_extras.c */
 721 int in_warn_on_macro(void);
 722 extern int SMATCH_EXTRA;
 723 extern int RETURN_ID;
 724
 725 struct data_range {
 726         sval_t min;
 727         sval_t max;
 728 };
 729
 730 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 731 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 732 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym, bool use_stack);
 733
 734 #define STRLEN_MAX_RET 1010101
 735
 736 /* smatch_absolute.c */
 737 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 738 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 739
 740 /* smatch_type_value.c */
 741 void disable_type_val_lookups(void);
 742 void enable_type_val_lookups(void);
 743 void clear_type_value_cache(void);
 744 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 745
 746 /* smatch_data_val.c */
 747 int get_mtag_rl(struct expression *expr, struct range_list **rl);
 748 /* smatch_array_values.c */
 749 void clear_array_values_cache(void);
 750 int get_array_rl(struct expression *expr, struct range_list **rl);
 751
 752 /* smatch_states.c */
 753 struct stree *__swap_cur_stree(struct stree *stree);
 754 void __push_fake_cur_stree();
 755 struct stree *__pop_fake_cur_stree();
 756 void __free_fake_cur_stree();
 757 void __set_fake_cur_stree_fast(struct stree *stree);
 758 void __pop_fake_cur_stree_fast(void);
 759 void __merge_stree_into_cur(struct stree *stree);
 760
 761 int unreachable(void);
 762 void __set_cur_stree_readonly(void);
 763 void __set_cur_stree_writable(void);
 764 void __set_sm(struct sm_state *sm);
 765 void __set_sm_cur_stree(struct sm_state *sm);
 766 void __set_true_false_sm(struct sm_state *true_state,
 767                         struct sm_state *false_state);
 768 void nullify_path(void);
 769 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 770                                void *unused);
 771 void __unnullify_path(void);
 772 int __path_is_null(void);
 773 void save_all_states(void);
 774 void restore_all_states(void);
 775 void free_goto_stack(void);
 776 void clear_all_states(void);
 777
 778 struct sm_state *get_sm_state(int owner, const char *name,
 779                                 struct symbol *sym);
 780 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 781 void __push_true_states(void);
 782 void __use_false_states(void);
 783 void __discard_false_states(void);
 784 void __merge_false_states(void);
 785 void __merge_true_states(void);
 786
 787 void __negate_cond_stacks(void);
 788 void __use_pre_cond_states(void);
 789 void __use_cond_true_states(void);
 790 void __use_cond_false_states(void);
 791 void __push_cond_stacks(void);
 792 void __fold_in_set_states(void);
 793 void __free_set_states(void);
 794 struct stree *__copy_cond_true_states(void);
 795 struct stree *__copy_cond_false_states(void);
 796 struct stree *__pop_cond_true_stack(void);
 797 struct stree *__pop_cond_false_stack(void);
 798 void __and_cond_states(void);
 799 void __or_cond_states(void);
 800 void __save_pre_cond_states(void);
 801 void __discard_pre_cond_states(void);
 802 struct stree *__get_true_states(void);
 803 struct stree *__get_false_states(void);
 804 void __use_cond_states(void);
 805 extern struct state_list *__last_base_slist;
 806
 807 void __push_continues(void);
 808 void __discard_continues(void);
 809 void __process_continues(void);
 810 void __merge_continues(void);
 811
 812 void __push_breaks(void);
 813 void __process_breaks(void);
 814 int __has_breaks(void);
 815 void __merge_breaks(void);
 816 void __use_breaks(void);
 817
 818 void __save_switch_states(struct expression *switch_expr);
 819 void __discard_switches(void);
 820 int have_remaining_cases(void);
 821 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl);
 822 void __push_default(void);
 823 void __set_default(void);
 824 bool __has_default_case(void);
 825 int __pop_default(void);
 826
 827 void __push_conditions(void);
 828 void __discard_conditions(void);
 829
 830 void __save_gotos(const char *name, struct symbol *sym);
 831 void __merge_gotos(const char *name, struct symbol *sym);
 832
 833 void __discard_fake_states(struct expression *call);
 834
 835 void __print_cur_stree(void);
 836 bool __print_states(const char *owner);
 837 typedef void (check_tracker_hook)(int owner, const char *name, struct symbol *sym, struct smatch_state *state);
 838 void add_check_tracker(const char *check_name, check_tracker_hook *fn);
 839
 840 /* smatch_hooks.c */
 841 void __pass_to_client(void *data, enum hook_type type);
 842 void __pass_case_to_client(struct expression *switch_expr,
 843                            struct range_list *rl);
 844 int __has_merge_function(int client_id);
 845 struct smatch_state *__client_merge_function(int owner,
 846                                              struct smatch_state *s1,
 847                                              struct smatch_state *s2);
 848 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 849 void call_pre_merge_hook(struct sm_state *cur, struct sm_state *other);
 850 void __push_scope_hooks(void);
 851 void __call_scope_hooks(void);
 852 void add_array_initialized_hook(void (*hook)(struct expression *array, int nr));
 853 void __call_array_initialized_hooks(struct expression *array, int nr);
 854
 855 /* smatch_function_hooks.c */
 856 void create_function_hook_hash(void);
 857 void __match_initializer_call(struct symbol *sym);
 858
 859 /* smatch_db.c */
 860 enum info_type {
 861         INTERNAL        = 0,
 862         /*
 863          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 864          * number it can't be re-used right away so there may be gaps.
 865          * We select these in order by type so if the order matters, then give
 866          * it a number below 100-999,9000-9999 ranges. */
 867
 868         PARAM_LIMIT     = 103,
 869         PARAM_FILTER    = 104,
 870
 871         RELEASE         = 500,
 872         BUF_CLEARED     = 501,
 873
 874         PARAM_VALUE     = 1001,
 875         BUF_SIZE        = 1002,
 876         CAPPED_DATA     = 1004,
 877         RETURN_VALUE    = 1005,
 878         DEREFERENCE     = 1006,
 879         RANGE_CAP       = 1007,
 880         ABSOLUTE_LIMITS = 1010,
 881         PARAM_ADD       = 1012,
 882         PARAM_FREED     = 1013,
 883         MAYBE_FREED     = 2014,
 884         DATA_SOURCE     = 1014,
 885         FUZZY_MAX       = 1015,
 886         HARD_MAX        = 2015,
 887         STR_LEN         = 1016,
 888         ARRAY_LEN       = 1017,
 889         CAPABLE         = 1018,
 890         NS_CAPABLE      = 1019,
 891         CONTAINER       = 1020,
 892         CASTED_CALL     = 1021,
 893         TYPE_LINK       = 1022,
 894         UNTRACKED_PARAM = 1023,
 895         LOST_PARAM      = 2023,
 896         CULL_PATH       = 1024,
 897         PARAM_SET       = 1025,
 898         PARAM_USED      = 1026,
 899         BYTE_UNITS      = 1027,
 900         COMPARE_LIMIT   = 1028,
 901         PARAM_COMPARE   = 1029,
 902         CONSTRAINT      = 1031,
 903         PASSES_TYPE     = 1032,
 904         CONSTRAINT_REQUIRED = 1033,
 905         BIT_INFO        = 1034,
 906         NOSPEC          = 1035,
 907         NOSPEC_WB       = 1036,
 908         STMT_CNT        = 1037,
 909         TERMINATED      = 1038,
 910         SLEEP           = 1039,
 911         FRESH_ALLOC     = 1044,
 912         ALLOCATOR       = 1045,
 913         FUNC_TIME       = 1047,
 914         POWER_OF_TWO    = 1048,
 915         POWER_OF_TWO_SET = 1049,
 916         BIT_SET         = 1051,
 917         BIT_CLEAR       = 1052,
 918         BIT_IS_SET      = 1053,
 919         BIT_IS_CLEAR    = 1054,
 920
 921         NEGATIVE_ERROR  = 1057,
 922         PREEMPT_ADD     = 2054,
 923         PREEMPT_SUB     = 2055,
 924         /* put random temporary stuff in the 7000-7999 range for testing */
 925         HOST_DATA       = 7016,
 926         HOST_DATA_SET   = 7017,
 927         HOST_PTR        = 7018,
 928         HOST_PTR_SET    = 7019,
 929         USER_DATA       = 8017,
 930         USER_DATA_SET   = 9017,
 931         USER_PTR        = 9018,
 932         USER_PTR_SET    = 9019,
 933         NO_OVERFLOW     = 8018,
 934         NO_OVERFLOW_SIMPLE = 8019,
 935         LOCK            = 8020,
 936         UNLOCK          = 8021,
 937         HALF_LOCKED     = 9022,
 938         RESTORE         = 9023,
 939         KNOWN_LOCKED    = 9024,
 940         KNOWN_UNLOCKED  = 9025,
 941         IGNORE_LOCK     = 9026,
 942         SET_FS          = 8022,
 943         ATOMIC_INC      = 8023,
 944         ATOMIC_DEC      = 8024,
 945         REFCOUNT_INIT   = 9025,
 946         REFCOUNT_INC    = 9027,
 947         REFCOUNT_DEC    = 9028,
 948         NO_SIDE_EFFECT  = 8025,
 949         FN_ARG_LINK     = 8028,
 950         DATA_VALUE      = 8029,
 951         ARRAYSIZE_ARG   = 8033,
 952         SIZEOF_ARG      = 8034,
 953         MEMORY_TAG      = 8036,
 954         MTAG_ASSIGN     = 8035,
 955         STRING_VALUE    = 8041,
 956         ALLOC           = 8045,
 957         RELEASE_OLD     = 8046, // FIXME: delete this after Jul 2022
 958
 959         BYTE_COUNT      = 8050,
 960         ELEM_COUNT      = 8051,
 961         ELEM_LAST       = 8052,
 962         USED_LAST       = 8053,
 963         USED_COUNT      = 8054,
 964
 965         /* Do not use numbers above 100k */
 966 };
 967
 968 extern struct sqlite3 *smatch_db;
 969 extern struct sqlite3 *mem_db;
 970 extern struct sqlite3 *cache_db;
 971
 972 bool db_incomplete(void);
 973 void db_ignore_states(int id);
 974 typedef bool (delete_hook)(struct expression *expr);
 975 void add_delete_return_hook(delete_hook *hook);
 976 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 977 void select_caller_name_sym(void (*fn)(const char *name, struct symbol *sym, char *value), int type);
 978 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 979 void add_caller_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 980 void add_return_info_callback(int owner,
 981                               void (*callback)(int return_id, char *return_ranges,
 982                                                struct expression *returned_expr,
 983                                                int param,
 984                                                const char *printed_name,
 985                                                struct sm_state *sm));
 986 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 987 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));
 988 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 989 void select_return_implies_hook_early(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 990 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 991 struct range_list *db_return_vals(struct expression *expr);
 992 struct range_list *db_return_vals_from_str(const char *fn_name);
 993 struct range_list *db_return_vals_no_args(struct expression *expr);
 994 bool get_implied_rl_from_call_str(struct expression *expr, const char *data, struct range_list **rl);
 995 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
 996 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
 997 char *get_name_sym_from_param_key(struct expression *expr, int param, const char *key, struct symbol **sym);
 998 char *get_param_name_var_sym(const char *name, struct symbol *sym);
 999 char *get_param_name(struct sm_state *sm);
1000 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
1001 const char *get_mtag_name_expr(struct expression *expr);
1002 char *get_data_info_name(struct expression *expr);
1003 char *sm_to_arg_name(struct expression *expr, struct sm_state *sm);
1004 int is_recursive_member(const char *param_name);
1005
1006 char *escape_newlines(const char *str);
1007 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
1008
1009 #define sql_helper(db, call_back, data, sql...)                                 \
1010 do {                                                                            \
1011         char sql_txt[1024];                                                     \
1012                                                                                 \
1013         sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql);                        \
1014         db_debug("debug: %s\n", sql_txt);                                       \
1015         sql_exec(db, call_back, data, sql_txt);                                 \
1016 } while (0)
1017
1018
1019 #define run_sql(call_back, data, sql...)                                        \
1020 do {                                                                            \
1021         if (option_no_db)                                                       \
1022                 break;                                                          \
1023         sql_helper(smatch_db, call_back, data, sql);                            \
1024 } while (0)
1025
1026 #define mem_sql(call_back, data, sql...)                                        \
1027         sql_helper(mem_db, call_back, data, sql)
1028
1029 #define cache_sql(call_back, data, sql...)                                      \
1030         sql_helper(cache_db, call_back, data, sql)
1031
1032 #define sql_insert_helper(table, db, ignore, late, values...)                   \
1033 do {                                                                            \
1034         struct sqlite3 *_db = db;                                               \
1035                                                                                 \
1036         if (__inline_fn && !_db)                                                \
1037                 _db = mem_db;                                                   \
1038         if (_db) {                                                              \
1039                 char buf[1024];                                                 \
1040                 char *err, *p = buf;                                            \
1041                 int rc;                                                         \
1042                                                                                 \
1043                 p += snprintf(p, buf + sizeof(buf) - p,                         \
1044                               "insert %sinto %s values (",                      \
1045                               ignore ? "or ignore " : "", #table);              \
1046                 p += snprintf(p, buf + sizeof(buf) - p, values);                \
1047                 p += snprintf(p, buf + sizeof(buf) - p, ");");                  \
1048                 db_debug("mem-db: %s\n", buf);                                  \
1049                 rc = sqlite3_exec(_db, buf, NULL, NULL, &err);                  \
1050                 if (rc != SQLITE_OK) {                                          \
1051                         sm_ierror("SQL error #2: %s", err);                     \
1052                         sm_ierror("SQL: '%s'", buf);                            \
1053                         parse_error = 1;                                        \
1054                 }                                                               \
1055                 break;                                                          \
1056         }                                                                       \
1057         if (option_info) {                                                      \
1058                 FILE *tmp_fd = sm_outfd;                                        \
1059                 sm_outfd = sql_outfd;                                           \
1060                 sm_prefix();                                                    \
1061                 sm_printf("SQL%s: insert %sinto " #table " values(",            \
1062                           late ? "_late" : "", ignore ? "or ignore " : "");     \
1063                 sm_printf(values);                                              \
1064                 sm_printf(");\n");                                              \
1065                 sm_outfd = tmp_fd;                                              \
1066         }                                                                       \
1067 } while (0)
1068
1069 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, 0, values);
1070 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 0, 1, 0, values);
1071 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 0, 1, values);
1072 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
1073
1074 char *get_static_filter(struct symbol *sym);
1075
1076 void sql_insert_return_states(int return_id, const char *return_ranges,
1077                 int type, int param, const char *key, const char *value);
1078 void sql_insert_caller_info(struct expression *call, int type, int param,
1079                 const char *key, const char *value);
1080 void sql_insert_function_ptr(const char *fn, const char *struct_name);
1081 void sql_insert_return_values(const char *return_values);
1082 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
1083 void sql_insert_function_type_size(const char *member, const char *ranges);
1084 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
1085 void sql_insert_type_info(int type, const char *member, const char *value);
1086 void sql_insert_local_values(const char *name, const char *value);
1087 void sql_insert_function_type_value(const char *type, const char *value);
1088 void sql_insert_function_type(int param, const char *value);
1089 void sql_insert_parameter_name(int param, const char *value);
1090 void sql_insert_data_info(struct expression *data, int type, const char *value);
1091 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
1092 void sql_save_constraint(const char *con);
1093 void sql_save_constraint_required(const char *data, int op, const char *limit);
1094 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
1095 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
1096 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
1097 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);
1098 void sql_insert_mtag_info(mtag_t tag, int type, const char *value);
1099 void sql_insert_mtag_map(mtag_t container, int container_offset, mtag_t tag, int tag_offset);
1100 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
1101 int mtag_map_select_container(mtag_t tag, int container_offset, mtag_t *container);
1102 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);
1103 struct smatch_state *get_mtag_return(struct expression *expr, struct smatch_state *state);
1104 struct range_list *swap_mtag_seed(struct expression *expr, struct range_list *rl);
1105
1106 bool is_fn_ptr(struct expression *fn);
1107 void sql_select_return_states(const char *cols, struct expression *call,
1108         int (*callback)(void*, int, char**, char**), void *info);
1109 void sql_select_call_implies(const char *cols, struct expression *call,
1110         int (*callback)(void*, int, char**, char**));
1111
1112 void open_smatch_db(char *db_file);
1113
1114 /* smatch_files.c */
1115 int open_data_file(const char *filename);
1116 int open_schema_file(const char *schema);
1117 struct token *get_tokens_file(const char *filename);
1118 struct string_list *load_strings_from_file(const char *project, const char *filename);
1119
1120 /* smatch.c */
1121 extern char *option_debug_check;
1122 extern char *option_debug_var;
1123 extern char *option_project_str;
1124 extern char *bin_dir;
1125 extern char *data_dir;
1126 extern int option_no_data;
1127 extern int option_full_path;
1128 extern int option_call_tree;
1129 extern int num_checks;
1130
1131 enum project_type {
1132         PROJ_NONE,
1133         PROJ_KERNEL,
1134         PROJ_WINE,
1135         PROJ_ILLUMOS_KERNEL,
1136         PROJ_ILLUMOS_USER,
1137         PROJ_UNKNOWN,
1138 };
1139 extern enum project_type option_project;
1140 const char *check_name(unsigned short id);
1141 int id_from_name(const char *name);
1142
1143
1144 /* smatch_buf_size.c */
1145 int get_array_size(struct expression *expr);
1146 int get_array_size_bytes(struct expression *expr);
1147 int get_array_size_bytes_min(struct expression *expr);
1148 int get_array_size_bytes_max(struct expression *expr);
1149 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1150 int get_real_array_size(struct expression *expr);
1151 int last_member_is_resizable(struct symbol *type);
1152 /* smatch_strlen.c */
1153 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1154 int get_size_from_strlen(struct expression *expr);
1155
1156 /* smatch_capped.c */
1157 int is_capped(struct expression *expr);
1158 int is_capped_var_sym(const char *name, struct symbol *sym);
1159
1160 /* smatch_kernel_user_data.c */
1161 int is_user_macro(struct expression *expr);
1162 int is_capped_user_data(struct expression *expr);
1163 int implied_user_data(struct expression *expr, struct range_list **rl);
1164 struct stree *get_user_stree(void);
1165 int get_user_rl(struct expression *expr, struct range_list **rl);
1166 int is_user_rl(struct expression *expr);
1167 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1168 bool user_rl_capped_var_sym(const char *name, struct symbol *sym);
1169 bool user_rl_capped(struct expression *expr);
1170 struct range_list *var_user_rl(struct expression *expr);
1171 bool we_pass_user_data(struct expression *call);
1172 /* smatch_points_to_user_data.c */
1173 bool is_user_data_fn(struct symbol *fn);
1174 bool is_skb_data(struct expression *expr);
1175 bool is_socket_stuff(struct symbol *sym);
1176 bool points_to_user_data(struct expression *expr);
1177 void set_points_to_user_data(struct expression *expr, bool is_new);
1178
1179 /* smatch_kernel_host_data.c */
1180 int is_host_macro(struct expression *expr);
1181 int is_capped_host_data(struct expression *expr);
1182 int implied_host_data(struct expression *expr, struct range_list **rl);
1183 struct stree *get_host_stree(void);
1184 int get_host_rl(struct expression *expr, struct range_list **rl);
1185 int is_host_rl(struct expression *expr);
1186 int get_host_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1187 bool host_rl_capped(struct expression *expr);
1188 struct range_list *var_host_rl(struct expression *expr);
1189 bool we_pass_host_data(struct expression *call);
1190 /* smatch_points_to_host_data.c */
1191 bool is_host_data_fn(struct symbol *fn);
1192 bool points_to_host_data(struct expression *expr);
1193 void set_points_to_host_data(struct expression *expr, bool is_new);
1194
1195 /* check_locking.c */
1196 void print_held_locks();
1197 /* preempt */
1198 void __preempt_add(void);
1199 void __preempt_sub(void);
1200 int get_preempt_cnt(void);
1201 void clear_preempt_cnt(void);
1202 bool function_decrements_preempt(void);
1203 void add_sleep_callback(void_fn *fn);
1204 unsigned long GFP_DIRECT_RECLAIM(void);
1205 unsigned long GFP_ATOMIC(void);
1206
1207 /* check_assigned_expr.c */
1208 extern int check_assigned_expr_id;
1209 struct expression *get_assigned_expr(struct expression *expr);
1210 struct sm_state *get_assigned_sm(struct expression *expr);
1211 struct expression *get_assigned_expr_recurse(struct expression *expr);
1212 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1213 struct expression *get_assigned_expr_name_sym_recurse(const char *name, struct symbol *sym);
1214
1215 /* smatch_return_to_param.c */
1216 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1217
1218 /* smatch_comparison.c */
1219 extern int comparison_id;
1220 #define UNKNOWN_COMPARISON 0
1221 #define IMPOSSIBLE_COMPARISON -1
1222 struct compare_data {
1223         /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1224         struct expression *left;
1225         const char *left_var;
1226         struct var_sym_list *left_vsl;
1227         int comparison;
1228         struct expression *right;
1229         const char *right_var;
1230         struct var_sym_list *right_vsl;
1231 };
1232 DECLARE_ALLOCATOR(compare_data);
1233 struct smatch_state *alloc_compare_state(
1234                 struct expression *left,
1235                 const char *left_var, struct var_sym_list *left_vsl,
1236                 int comparison,
1237                 struct expression *right,
1238                 const char *right_var, struct var_sym_list *right_vsl);
1239 int comparison_intersection(int orig, int op);
1240 int merge_comparisons(int one, int two);
1241 int combine_comparisons(int left_compare, int right_compare);
1242 int state_to_comparison(struct smatch_state *state);
1243 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1244 int get_comparison(struct expression *left, struct expression *right);
1245 int get_comparison_no_extra(struct expression *a, struct expression *b);
1246 int get_comparison_strings(const char *one, const char *two);
1247 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1248 struct state_list *get_all_comparisons(struct expression *expr);
1249 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1250 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1251 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1252 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1253 char *expr_equal_to_param(struct expression *expr, int ignore);
1254 char *expr_lte_to_param(struct expression *expr, int ignore);
1255 char *expr_param_comparison(struct expression *expr, int ignore);
1256 int flip_comparison(int op);
1257 int negate_comparison(int op);
1258 int remove_unsigned_from_comparison(int op);
1259 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1260 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1261 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,
1262                                 const char *state_name,
1263                                 struct smatch_state *true_state, struct smatch_state *false_state);
1264 int impossibly_high_comparison(struct expression *expr);
1265 void add_comparison_var_sym(
1266                 struct expression *left_expr,
1267                 const char *left_name, struct var_sym_list *left_vsl,
1268                 int comparison,
1269                 struct expression *right_expr,
1270                 const char *right_name, struct var_sym_list *right_vsl,
1271                 struct expression *mod_expr);
1272
1273 /* smatch_sval.c */
1274 sval_t *sval_alloc(sval_t sval);
1275 sval_t *sval_alloc_permanent(sval_t sval);
1276 sval_t sval_blank(struct expression *expr);
1277 sval_t sval_type_val(struct symbol *type, long long val);
1278 sval_t sval_type_fval(struct symbol *type, long double fval);
1279 sval_t sval_from_val(struct expression *expr, long long val);
1280 sval_t sval_from_fval(struct expression *expr, long double fval);
1281 int sval_is_ptr(sval_t sval);
1282 bool sval_is_fp(sval_t sval);
1283 int sval_unsigned(sval_t sval);
1284 int sval_signed(sval_t sval);
1285 int sval_bits(sval_t sval);
1286 int sval_bits_used(sval_t sval);
1287 int sval_is_negative(sval_t sval);
1288 int sval_is_positive(sval_t sval);
1289 int sval_is_min(sval_t sval);
1290 int sval_is_max(sval_t sval);
1291 int sval_is_a_min(sval_t sval);
1292 int sval_is_a_max(sval_t sval);
1293 int sval_is_negative_min(sval_t sval);
1294 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1295 int sval_cmp_val(sval_t one, long long val);
1296 sval_t sval_min(sval_t one, sval_t two);
1297 sval_t sval_min_nonneg(sval_t one, sval_t two);
1298 sval_t sval_max(sval_t one, sval_t two);
1299 int sval_too_low(struct symbol *type, sval_t sval);
1300 int sval_too_high(struct symbol *type, sval_t sval);
1301 int sval_fits(struct symbol *type, sval_t sval);
1302 sval_t sval_cast(struct symbol *type, sval_t sval);
1303 sval_t sval_preop(sval_t sval, int op);
1304 sval_t sval_binop(sval_t left, int op, sval_t right);
1305 int sval_binop_overflows(sval_t left, int op, sval_t right);
1306 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);
1307 int find_first_zero_bit(unsigned long long uvalue);
1308 int sm_fls64(unsigned long long uvalue);
1309 unsigned long long fls_mask(unsigned long long uvalue);
1310 unsigned long long sval_fls_mask(sval_t sval);
1311 const char *sval_to_str(sval_t sval);
1312 const char *sval_to_str_or_err_ptr(sval_t sval);
1313 const char *sval_to_numstr(sval_t sval);
1314 sval_t ll_to_sval(long long val);
1315
1316 /* smatch_string_list.c */
1317 int list_has_string(struct string_list *str_list, const char *str);
1318 int insert_string(struct string_list **str_list, const char *str);
1319 struct string_list *clone_str_list(struct string_list *orig);
1320 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1321
1322 /* smatch_start_states.c */
1323 struct stree *get_start_states(void);
1324
1325 /* smatch_recurse.c */
1326 int has_symbol(struct expression *expr, struct symbol *sym);
1327 int has_variable(struct expression *expr, struct expression *var);
1328 int has_inc_dec(struct expression *expr);
1329
1330 /* smatch_stored_conditions.c */
1331 struct smatch_state *get_stored_condition(struct expression *expr);
1332 struct expression_list *get_conditions(struct expression *expr);
1333 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1334                         struct state_list **true_stack,
1335                         struct state_list **false_stack);
1336 /* smatch_parsed_conditions.c */
1337 struct sm_state *parsed_condition_implication_hook(struct expression *expr,
1338                         struct state_list **true_stack,
1339                         struct state_list **false_stack);
1340 /* smatch_comparison.c */
1341 struct sm_state *comparison_implication_hook(struct expression *expr,
1342                                              struct state_list **true_stack,
1343                                              struct state_list **false_stack);
1344
1345 /* check_string_len.c */
1346 int get_formatted_string_size(struct expression *call, int arg);
1347 int get_formatted_string_min_size(struct expression *call, int arg);
1348
1349 /* smatch_param_set.c */
1350 int param_was_set(struct expression *expr);
1351 int param_was_set_var_sym(const char *name, struct symbol *sym);
1352 void print_limited_param_set(int return_id, char *return_ranges, struct expression *expr);
1353 /* param_clear */
1354 void __promote_sets_to_clears(int return_id, char *return_ranges, struct expression *expr);
1355 bool parent_was_PARAM_CLEAR(const char *name, struct symbol *sym);
1356 bool parent_was_PARAM_CLEAR_ZERO(const char *name, struct symbol *sym);
1357
1358 /* smatch_param_filter.c */
1359 int param_has_filter_data(struct sm_state *sm);
1360
1361 /* smatch_links.c */
1362 void set_up_link_functions(int id, int linkid);
1363 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1364 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1365
1366 /* check_buf_comparison */
1367 const char *limit_type_str(unsigned int limit_type);
1368 struct expression *get_size_variable(struct expression *buf, int *limit_type);
1369 struct expression *get_array_variable(struct expression *size);
1370 int buf_comparison_index_ok(struct expression *expr);
1371 bool buf_comp_has_bytes(struct expression *buf, struct expression *var);
1372 bool buf_comp2_has_bytes(struct expression *buf_expr, struct expression *var);
1373
1374 /* smatch_untracked_param.c */
1375 void mark_untracked(struct expression *expr, int param, const char *key, const char *value);
1376 void add_untracked_param_hook(void (func)(struct expression *call, int param));
1377 void add_lost_param_hook(void (func)(struct expression *call, int param));
1378 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1379
1380 /* smatch_strings.c */
1381 struct state_list *get_strings(struct expression *expr);
1382 struct expression *fake_string_from_mtag(mtag_t tag);
1383
1384 /* smatch_estate.c */
1385 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1386
1387 /* smatch_address.c */
1388 int get_address_rl(struct expression *expr, struct range_list **rl);
1389 int get_member_offset(struct symbol *type, const char *member_name);
1390 int get_member_offset_from_deref(struct expression *expr);
1391
1392 /* for now this is in smatch_used_parameter.c */
1393 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1394 extern int __ignore_param_used;
1395
1396 /* smatch_buf_comparison.c */
1397 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1398
1399 struct range_list *get_fs(void);
1400
1401 struct stree *get_all_return_states(void);
1402 struct stree_stack *get_all_return_strees(void);
1403 int on_atomic_dec_path(void);
1404 int was_inced(const char *name, struct symbol *sym);
1405 void set_refcount_inc(char *name, struct symbol *sym);
1406 void set_refcount_dec(char *name, struct symbol *sym);
1407 void add_refcount_init_hook(name_sym_hook *hook);
1408 void add_refcount_inc_hook(name_sym_hook *hook);
1409 void add_refcount_dec_hook(name_sym_hook *hook);
1410
1411 /* smatch_constraints.c */
1412 char *get_constraint_str(struct expression *expr);
1413 struct constraint_list *get_constraints(struct expression *expr);
1414 char *unmet_constraint(struct expression *data, struct expression *offset);
1415 char *get_required_constraint(const char *data_str);
1416
1417 /* smatch_container_of.c */
1418 int get_param_from_container_of(struct expression *expr);
1419 int get_offset_from_container_of(struct expression *expr);
1420 char *get_container_name(struct expression *container, struct expression *expr);
1421
1422 /* smatch_mtag.c */
1423 mtag_t str_to_mtag(const char *str);
1424 int get_string_mtag(struct expression *expr, mtag_t *tag);
1425 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);
1426 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1427 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1428 void update_mtag_data(struct expression *expr, struct smatch_state *state);
1429 int get_mtag_sval(struct expression *expr, sval_t *sval);
1430
1431 /* Trinity fuzzer stuff */
1432 const char *get_syscall_arg_type(struct symbol *sym);
1433
1434 /* smatch_bits.c */
1435 int binfo_equiv(struct bit_info *one, struct bit_info *two);
1436 struct bit_info *alloc_bit_info(unsigned long long set, unsigned long long possible);
1437 struct smatch_state *alloc_bstate(unsigned long long set, unsigned long long possible);
1438 struct smatch_state *merge_bstates(struct smatch_state *one_state, struct smatch_state *two_state);
1439
1440 /* smatch_param_bits_set.c */
1441 void __set_param_modified_helper(struct expression *expr, struct  smatch_state *state);
1442 void __set_param_modified_helper_sym(const char *name, struct symbol *sym,
1443                                      struct smatch_state *state);
1444
1445 /* smatch_param_bits_clear.c */
1446 void __set_param_modified_helper_clear(struct expression *expr, struct smatch_state *state);
1447 void __set_param_modified_helper_sym_clear(const char *name, struct symbol *sym,
1448                                            struct smatch_state *state);
1449
1450 /* smatch_bit_info.c */
1451 struct bit_info *rl_to_binfo(struct range_list *rl);
1452 struct bit_info *get_bit_info(struct expression *expr);
1453 struct bit_info *get_bit_info_var_sym(const char *name, struct symbol *sym);
1454
1455 /* smatch_mem_tracker.c */
1456 extern int option_mem;
1457 unsigned long get_mem_kb(void);
1458 unsigned long get_max_memory(void);
1459
1460 /* check_is_nospec.c */
1461 bool is_nospec(struct expression *expr);
1462 long get_stmt_cnt(void);
1463
1464 /* smatch_nul_terminator.c */
1465 bool is_nul_terminated_var_sym(const char *name, struct symbol *sym);
1466 bool is_nul_terminated(struct expression *expr);
1467 /* check_kernel.c  */
1468 bool is_ignored_kernel_data(const char *name);
1469 int get_gfp_param(struct expression *expr);
1470
1471 bool is_fresh_alloc_var_sym(const char *var, struct symbol *sym);
1472 bool is_fresh_alloc(struct expression *expr);
1473 bool is_freed_var_sym(const char *name, struct symbol *sym);
1474 void track_freed_param(struct expression *expr, struct smatch_state *state);
1475 void track_freed_param_var_sym(const char *name, struct symbol *sym,
1476                                struct smatch_state *state);
1477 bool is_part_of_condition(struct expression *expr);
1478 bool is_percent_p_print(struct expression *expr);
1479
1480 void add_free_hook(name_sym_hook *hook);
1481
1482 /* smatch_unconstant_macros.c */
1483 int is_unconstant_macro(struct expression *expr);
1484
1485 /* smatch_assigned_state.c */
1486 void add_state_assigned_hook(int owner, sm_hook *call_back);
1487 void add_ssa_state_assigned_hook(int owner, sm_hook *call_back);
1488
1489 static inline bool type_is_ptr(struct symbol *type)
1490 {
1491         return type &&
1492                (type->type == SYM_PTR ||
1493                 type->type == SYM_ARRAY ||
1494                 type->type == SYM_FN);
1495 }
1496
1497 static inline bool type_is_fp(struct symbol *type)
1498 {
1499         return type &&
1500                (type == &float_ctype ||
1501                 type == &double_ctype ||
1502                 type == &ldouble_ctype);
1503 }
1504
1505 static inline int type_bits(struct symbol *type)
1506 {
1507         if (!type)
1508                 return 0;
1509         if (type_is_ptr(type))
1510                 return bits_in_pointer;
1511         if (!type->examined)
1512                 examine_symbol_type(type);
1513         return type->bit_size;
1514 }
1515
1516 static inline int type_unsigned(struct symbol *base_type)
1517 {
1518         if (!base_type)
1519                 return 0;
1520         if (is_ptr_type(base_type))
1521                 return 1;
1522         if (base_type->ctype.modifiers & MOD_UNSIGNED)
1523                 return 1;
1524         return 0;
1525 }
1526
1527 static inline int type_positive_bits(struct symbol *type)
1528 {
1529         if (!type)
1530                 return 0;
1531         if (is_ptr_type(type))
1532                 return bits_in_pointer;
1533         if (type_unsigned(type))
1534                 return type_bits(type);
1535         return type_bits(type) - 1;
1536 }
1537
1538 static inline int sval_positive_bits(sval_t sval)
1539 {
1540         return type_positive_bits(sval.type);
1541 }
1542
1543 /*
1544  * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1545  */
1546
1547 static inline int fp_cmp(sval_t one, sval_t two)
1548 {
1549         struct symbol *type;
1550
1551         if (sval_is_fp(one) && sval_is_fp(two))
1552                 type = type_bits(one.type) > type_bits(two.type) ? one.type : two.type;
1553         else if (sval_is_fp(one))
1554                 type = one.type;
1555         else
1556                 type = two.type;
1557
1558         one = sval_cast(type, one);
1559         two = sval_cast(type, two);
1560
1561         if (one.type == &float_ctype) {
1562                 if (one.fvalue < two.fvalue)
1563                         return -1;
1564                 if (one.fvalue == two.fvalue)
1565                         return 0;
1566                 return 1;
1567         }
1568         if (one.type == &double_ctype) {
1569                 if (one.dvalue < two.dvalue)
1570                         return -1;
1571                 if (one.dvalue == two.dvalue)
1572                         return 0;
1573                 return 1;
1574         }
1575         if (one.type == &ldouble_ctype) {
1576                 if (one.ldvalue < two.ldvalue)
1577                         return -1;
1578                 if (one.ldvalue == two.ldvalue)
1579                         return 0;
1580                 return 1;
1581         }
1582         sm_perror("bad type in fp_cmp(): %s", type_to_str(type));
1583         return 1;
1584 }
1585
1586 static inline int sval_cmp(sval_t one, sval_t two)
1587 {
1588         struct symbol *type;
1589
1590         if (sval_is_fp(one) || sval_is_fp(two))
1591                 return fp_cmp(one, two);
1592
1593         type = one.type;
1594         if (sval_positive_bits(two) > sval_positive_bits(one))
1595                 type = two.type;
1596         if (type_bits(type) < 31)
1597                 type = &int_ctype;
1598
1599         one = sval_cast(type, one);
1600         two = sval_cast(type, two);
1601
1602         if (type_unsigned(type)) {
1603                 if (one.uvalue < two.uvalue)
1604                         return -1;
1605                 if (one.uvalue == two.uvalue)
1606                         return 0;
1607                 return 1;
1608         }
1609         /* fix me handle type promotion and unsigned values */
1610         if (one.value < two.value)
1611                 return -1;
1612         if (one.value == two.value)
1613                 return 0;
1614         return 1;
1615 }
1616
1617 #endif      /* !SMATCH_H_ */