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 <sys/time.h>
  25 #include <sqlite3.h>
  26 #include "lib.h"
  27 #include "allocate.h"
  28 #include "scope.h"
  29 #include "parse.h"
  30 #include "expression.h"
  31 #include "avl.h"
  32
  33 typedef struct {
  34         struct symbol *type;
  35         union {
  36                 long long value;
  37                 unsigned long long uvalue;
  38         };
  39 } sval_t;
  40
  41 typedef long long mtag_t;
  42
  43 struct smatch_state {
  44         const char *name;
  45         void *data;
  46 };
  47 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
  48 extern struct smatch_state undefined;
  49 extern struct smatch_state ghost;
  50 extern struct smatch_state merged;
  51 extern struct smatch_state true_state;
  52 extern struct smatch_state false_state;
  53 DECLARE_ALLOCATOR(smatch_state);
  54
  55 static inline void *INT_PTR(int i)
  56 {
  57         return (void *)(long)i;
  58 }
  59
  60 static inline int PTR_INT(void *p)
  61 {
  62         return (int)(long)p;
  63 }
  64
  65 struct tracker {
  66         char *name;
  67         struct symbol *sym;
  68         unsigned short owner;
  69 };
  70 DECLARE_ALLOCATOR(tracker);
  71 DECLARE_PTR_LIST(tracker_list, struct tracker);
  72 DECLARE_PTR_LIST(stree_stack, struct stree);
  73
  74 /* The first 3 struct members must match struct tracker */
  75 struct sm_state {
  76         const char *name;
  77         struct symbol *sym;
  78         unsigned short owner;
  79         unsigned short merged:1;
  80         unsigned short skip_implications:1;
  81         unsigned short nr_children:14;
  82         unsigned int line;
  83         struct smatch_state *state;
  84         struct stree *pool;
  85         struct sm_state *left;
  86         struct sm_state *right;
  87         struct state_list *possible;
  88 };
  89 #define MAX_CHILDREN 0x3FFF /* 2**14 - 1 */
  90
  91 struct var_sym {
  92         char *var;
  93         struct symbol *sym;
  94 };
  95 DECLARE_ALLOCATOR(var_sym);
  96 DECLARE_PTR_LIST(var_sym_list, struct var_sym);
  97
  98 struct constraint {
  99         int op;
 100         int id;
 101 };
 102 DECLARE_PTR_LIST(constraint_list, struct constraint);
 103
 104 enum hook_type {
 105         EXPR_HOOK,
 106         STMT_HOOK,
 107         STMT_HOOK_AFTER,
 108         SYM_HOOK,
 109         STRING_HOOK,
 110         DECLARATION_HOOK,
 111         ASSIGNMENT_HOOK,
 112         ASSIGNMENT_HOOK_AFTER,
 113         RAW_ASSIGNMENT_HOOK,
 114         GLOBAL_ASSIGNMENT_HOOK,
 115         LOGIC_HOOK,
 116         CONDITION_HOOK,
 117         PRELOOP_HOOK,
 118         SELECT_HOOK,
 119         WHOLE_CONDITION_HOOK,
 120         FUNCTION_CALL_HOOK_BEFORE,
 121         FUNCTION_CALL_HOOK,
 122         CALL_HOOK_AFTER_INLINE,
 123         FUNCTION_CALL_HOOK_AFTER_DB,
 124         CALL_ASSIGNMENT_HOOK,
 125         MACRO_ASSIGNMENT_HOOK,
 126         BINOP_HOOK,
 127         OP_HOOK,
 128         DEREF_HOOK,
 129         CASE_HOOK,
 130         ASM_HOOK,
 131         CAST_HOOK,
 132         SIZEOF_HOOK,
 133         BASE_HOOK,
 134         FUNC_DEF_HOOK,
 135         AFTER_DEF_HOOK,
 136         END_FUNC_HOOK,
 137         AFTER_FUNC_HOOK,
 138         RETURN_HOOK,
 139         INLINE_FN_START,
 140         INLINE_FN_END,
 141         END_FILE_HOOK,
 142         NUM_HOOKS,
 143 };
 144
 145 #define TRUE 1
 146 #define FALSE 0
 147
 148 struct range_list;
 149
 150 void add_hook(void *func, enum hook_type type);
 151 typedef struct smatch_state *(merge_func_t)(struct smatch_state *s1, struct smatch_state *s2);
 152 typedef struct smatch_state *(unmatched_func_t)(struct sm_state *state);
 153 void add_merge_hook(int client_id, merge_func_t *func);
 154 void add_unmatched_state_hook(int client_id, unmatched_func_t *func);
 155 void add_pre_merge_hook(int client_id, void (*hook)(struct sm_state *sm));
 156 typedef void (scope_hook)(void *data);
 157 void add_scope_hook(scope_hook *hook, void *data);
 158 typedef void (func_hook)(const char *fn, struct expression *expr, void *data);
 159 typedef void (implication_hook)(const char *fn, struct expression *call_expr,
 160                                 struct expression *assign_expr, void *data);
 161 typedef void (return_implies_hook)(struct expression *call_expr,
 162                                    int param, char *key, char *value);
 163 typedef int (implied_return_hook)(struct expression *call_expr, void *info, struct range_list **rl);
 164 void add_function_hook(const char *look_for, func_hook *call_back, void *data);
 165
 166 void add_function_assign_hook(const char *look_for, func_hook *call_back,
 167                               void *info);
 168 void add_implied_return_hook(const char *look_for,
 169                              implied_return_hook *call_back,
 170                              void *info);
 171 void add_macro_assign_hook(const char *look_for, func_hook *call_back,
 172                               void *info);
 173 void add_macro_assign_hook_extra(const char *look_for, func_hook *call_back,
 174                               void *info);
 175 void return_implies_state(const char *look_for, long long start, long long end,
 176                          implication_hook *call_back, void *info);
 177 void select_return_states_hook(int type, return_implies_hook *callback);
 178 void select_return_states_before(void (*fn)(void));
 179 void select_return_states_after(void (*fn)(void));
 180 int get_implied_return(struct expression *expr, struct range_list **rl);
 181 void allocate_hook_memory(void);
 182
 183 struct modification_data {
 184         struct smatch_state *prev;
 185         struct expression *cur;
 186 };
 187
 188 typedef void (modification_hook)(struct sm_state *sm, struct expression *mod_expr);
 189 void add_modification_hook(int owner, modification_hook *call_back);
 190 void add_modification_hook_late(int owner, modification_hook *call_back);
 191 struct smatch_state *get_modification_state(struct expression *expr);
 192
 193 int outside_of_function(void);
 194 const char *get_filename(void);
 195 const char *get_base_file(void);
 196 char *get_function(void);
 197 int get_lineno(void);
 198 extern int final_pass;
 199 extern struct symbol *cur_func_sym;
 200 extern int option_debug;
 201 extern int local_debug;
 202 extern int option_info;
 203 extern int option_spammy;
 204 extern char *trace_variable;
 205 extern struct stree *global_states;
 206 int is_skipped_function(void);
 207 int is_silenced_function(void);
 208
 209 /* smatch_impossible.c */
 210 int is_impossible_path(void);
 211 void set_path_impossible(void);
 212
 213 extern FILE *sm_outfd;
 214 extern FILE *sql_outfd;
 215 extern FILE *caller_info_fd;
 216 extern int sm_nr_checks;
 217 extern int sm_nr_errors;
 218
 219 /*
 220  * How to use these routines:
 221  *
 222  * sm_fatal(): an internal error of some kind that should immediately exit
 223  * sm_ierror(): an internal error
 224  * sm_perror(): an internal error from parsing input source
 225  * sm_error(): an error from input source
 226  * sm_warning(): a warning from input source
 227  * sm_info(): info message (from option_info)
 228  * sm_debug(): debug message
 229  * sm_msg(): other message (please avoid using this)
 230  */
 231
 232 #define sm_printf(msg...) do { if (final_pass || option_debug || local_debug) fprintf(sm_outfd, msg); } while (0)
 233
 234 static inline void sm_prefix(void)
 235 {
 236         sm_printf("%s:%d %s() ", get_filename(), get_lineno(), get_function());
 237 }
 238
 239 static inline void print_implied_debug_msg();
 240
 241 extern bool __silence_warnings_for_stmt;
 242
 243 #define sm_print_msg(type, msg...) \
 244 do {                                                           \
 245         print_implied_debug_msg();                             \
 246         if (!final_pass && !option_debug && !local_debug)      \
 247                 break;                                         \
 248         if (__silence_warnings_for_stmt && !option_debug && !local_debug) \
 249                 break;                                         \
 250         if (!option_info && is_silenced_function())            \
 251                 break;                                         \
 252         sm_prefix();                                           \
 253         if (type == 1) {                                       \
 254                 sm_printf("warn: ");                           \
 255                 sm_nr_checks++;                                \
 256         } else if (type == 2) {                                \
 257                 sm_printf("error: ");                          \
 258                 sm_nr_checks++;                                \
 259         } else if (type == 3) {                                \
 260                 sm_printf("parse error: ");                    \
 261                 sm_nr_errors++;                                \
 262         }                                                      \
 263         sm_printf(msg);                                        \
 264         sm_printf("\n");                                       \
 265 } while (0)
 266
 267 #define sm_msg(msg...) do { sm_print_msg(0, msg); } while (0)
 268
 269 #define local_debug(msg...)                                     \
 270 do {                                                            \
 271         if (local_debug)                                        \
 272                 sm_msg(msg);                                    \
 273 } while (0)
 274
 275 extern char *implied_debug_msg;
 276 static inline void print_implied_debug_msg(void)
 277 {
 278         static struct symbol *last_printed = NULL;
 279
 280         if (!implied_debug_msg)
 281                 return;
 282         if (last_printed == cur_func_sym)
 283                 return;
 284         last_printed = cur_func_sym;
 285         sm_msg("%s", implied_debug_msg);
 286 }
 287
 288 #define sm_debug(msg...) do { if (option_debug) sm_printf(msg); } while (0)
 289
 290 #define sm_info(msg...) do {                                    \
 291         if (option_debug || (option_info && final_pass)) {      \
 292                 sm_prefix();                                    \
 293                 sm_printf("info: ");                            \
 294                 sm_printf(msg);                                 \
 295                 sm_printf("\n");                                \
 296         }                                                       \
 297 } while(0)
 298
 299 #define sm_warning(msg...) do { sm_print_msg(1, msg); } while (0)
 300 #define sm_error(msg...) do { sm_print_msg(2, msg); } while (0)
 301 #define sm_perror(msg...) do { sm_print_msg(3, msg); } while (0)
 302
 303 static inline void sm_fatal(const char *fmt, ...)
 304 {
 305         va_list args;
 306
 307         va_start(args, fmt);
 308         vfprintf(sm_outfd, fmt, args);
 309         va_end(args);
 310
 311         fprintf(sm_outfd, "\n");
 312
 313         exit(1);
 314 }
 315
 316 static inline void sm_ierror(const char *fmt, ...)
 317 {
 318         va_list args;
 319
 320         sm_nr_errors++;
 321
 322         fprintf(sm_outfd, "internal error: ");
 323
 324         va_start(args, fmt);
 325         vfprintf(sm_outfd, fmt, args);
 326         va_end(args);
 327
 328         fprintf(sm_outfd, "\n");
 329 }
 330 #define ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1))
 331
 332 struct smatch_state *__get_state(int owner, const char *name, struct symbol *sym);
 333 struct smatch_state *get_state(int owner, const char *name, struct symbol *sym);
 334 struct smatch_state *get_state_expr(int owner, struct expression *expr);
 335 struct state_list *get_possible_states(int owner, const char *name,
 336                                        struct symbol *sym);
 337 struct state_list *get_possible_states_expr(int owner, struct expression *expr);
 338 struct sm_state *set_state(int owner, const char *name, struct symbol *sym,
 339                struct smatch_state *state);
 340 struct sm_state *set_state_expr(int owner, struct expression *expr,
 341                 struct smatch_state *state);
 342 void delete_state(int owner, const char *name, struct symbol *sym);
 343 void delete_state_expr(int owner, struct expression *expr);
 344 void __delete_all_states_sym(struct symbol *sym);
 345 void set_true_false_states(int owner, const char *name, struct symbol *sym,
 346                            struct smatch_state *true_state,
 347                            struct smatch_state *false_state);
 348 void set_true_false_states_expr(int owner, struct expression *expr,
 349                            struct smatch_state *true_state,
 350                            struct smatch_state *false_state);
 351
 352 struct stree *get_all_states_from_stree(int owner, struct stree *source);
 353 struct stree *get_all_states_stree(int id);
 354 struct stree *__get_cur_stree(void);
 355 int is_reachable(void);
 356 void add_get_state_hook(void (*fn)(int owner, const char *name, struct symbol *sym));
 357
 358 /* smatch_helper.c */
 359 DECLARE_PTR_LIST(int_stack, int);
 360 char *alloc_string(const char *str);
 361 void free_string(char *str);
 362 void append(char *dest, const char *data, int buff_len);
 363 void remove_parens(char *str);
 364 struct smatch_state *alloc_state_num(int num);
 365 struct smatch_state *alloc_state_str(const char *name);
 366 struct smatch_state *alloc_state_expr(struct expression *expr);
 367 struct expression *get_argument_from_call_expr(struct expression_list *args,
 368                                                int num);
 369
 370 char *expr_to_var(struct expression *expr);
 371 struct symbol *expr_to_sym(struct expression *expr);
 372 char *expr_to_str(struct expression *expr);
 373 char *expr_to_str_sym(struct expression *expr,
 374                                      struct symbol **sym_ptr);
 375 char *expr_to_var_sym(struct expression *expr,
 376                              struct symbol **sym_ptr);
 377 char *expr_to_known_chunk_sym(struct expression *expr, struct symbol **sym);
 378 char *expr_to_chunk_sym_vsl(struct expression *expr, struct symbol **sym, struct var_sym_list **vsl);
 379 int get_complication_score(struct expression *expr);
 380
 381 int sym_name_is(const char *name, struct expression *expr);
 382 int get_const_value(struct expression *expr, sval_t *sval);
 383 int get_value(struct expression *expr, sval_t *val);
 384 int get_implied_value(struct expression *expr, sval_t *val);
 385 int get_implied_min(struct expression *expr, sval_t *sval);
 386 int get_implied_max(struct expression *expr, sval_t *val);
 387 int get_hard_max(struct expression *expr, sval_t *sval);
 388 int get_fuzzy_min(struct expression *expr, sval_t *min);
 389 int get_fuzzy_max(struct expression *expr, sval_t *max);
 390 int get_absolute_min(struct expression *expr, sval_t *sval);
 391 int get_absolute_max(struct expression *expr, sval_t *sval);
 392 int parse_call_math(struct expression *expr, char *math, sval_t *val);
 393 int parse_call_math_rl(struct expression *call, const char *math, struct range_list **rl);
 394 char *get_value_in_terms_of_parameter_math(struct expression *expr);
 395 char *get_value_in_terms_of_parameter_math_var_sym(const char *var, struct symbol *sym);
 396 int is_zero(struct expression *expr);
 397 int known_condition_true(struct expression *expr);
 398 int known_condition_false(struct expression *expr);
 399 int implied_condition_true(struct expression *expr);
 400 int implied_condition_false(struct expression *expr);
 401 int can_integer_overflow(struct symbol *type, struct expression *expr);
 402 void clear_math_cache(void);
 403
 404 int is_array(struct expression *expr);
 405 struct expression *get_array_base(struct expression *expr);
 406 struct expression *get_array_offset(struct expression *expr);
 407 const char *show_state(struct smatch_state *state);
 408 struct statement *get_expression_statement(struct expression *expr);
 409 struct expression *strip_parens(struct expression *expr);
 410 struct expression *strip_expr(struct expression *expr);
 411 struct expression *strip_expr_set_parent(struct expression *expr);
 412 void scoped_state(int my_id, const char *name, struct symbol *sym);
 413 int is_error_return(struct expression *expr);
 414 int getting_address(void);
 415 int get_struct_and_member(struct expression *expr, const char **type, const char **member);
 416 char *get_member_name(struct expression *expr);
 417 char *get_fnptr_name(struct expression *expr);
 418 int cmp_pos(struct position pos1, struct position pos2);
 419 int positions_eq(struct position pos1, struct position pos2);
 420 struct statement *get_current_statement(void);
 421 struct statement *get_prev_statement(void);
 422 struct expression *get_last_expr_from_expression_stmt(struct expression *expr);
 423 int get_param_num_from_sym(struct symbol *sym);
 424 int get_param_num(struct expression *expr);
 425 int ms_since(struct timeval *start);
 426 int parent_is_gone_var_sym(const char *name, struct symbol *sym);
 427 int parent_is_gone(struct expression *expr);
 428 int invert_op(int op);
 429 int expr_equiv(struct expression *one, struct expression *two);
 430 void push_int(struct int_stack **stack, int num);
 431 int pop_int(struct int_stack **stack);
 432
 433 /* smatch_type.c */
 434 struct symbol *get_real_base_type(struct symbol *sym);
 435 int type_bytes(struct symbol *type);
 436 int array_bytes(struct symbol *type);
 437 struct symbol *get_pointer_type(struct expression *expr);
 438 struct symbol *get_type(struct expression *expr);
 439 struct symbol *get_final_type(struct expression *expr);
 440 struct symbol *get_promoted_type(struct symbol *left, struct symbol *right);
 441 int type_signed(struct symbol *base_type);
 442 int expr_unsigned(struct expression *expr);
 443 int expr_signed(struct expression *expr);
 444 int returns_unsigned(struct symbol *base_type);
 445 int is_pointer(struct expression *expr);
 446 int returns_pointer(struct symbol *base_type);
 447 sval_t sval_type_max(struct symbol *base_type);
 448 sval_t sval_type_min(struct symbol *base_type);
 449 int nr_bits(struct expression *expr);
 450 int is_void_pointer(struct expression *expr);
 451 int is_char_pointer(struct expression *expr);
 452 int is_string(struct expression *expr);
 453 int is_static(struct expression *expr);
 454 int is_local_variable(struct expression *expr);
 455 int types_equiv(struct symbol *one, struct symbol *two);
 456 int fn_static(void);
 457 const char *global_static();
 458 struct symbol *cur_func_return_type(void);
 459 struct symbol *get_arg_type(struct expression *fn, int arg);
 460 struct symbol *get_member_type_from_key(struct expression *expr, const char *key);
 461 struct symbol *get_arg_type_from_key(struct expression *fn, int param, struct expression *arg, const char *key);
 462 int is_struct(struct expression *expr);
 463 char *type_to_str(struct symbol *type);
 464
 465 /* smatch_ignore.c */
 466 void add_ignore(int owner, const char *name, struct symbol *sym);
 467 int is_ignored(int owner, const char *name, struct symbol *sym);
 468 void add_ignore_expr(int owner, struct expression *expr);
 469 int is_ignored_expr(int owner, struct expression *expr);
 470
 471 /* smatch_var_sym */
 472 struct var_sym *alloc_var_sym(const char *var, struct symbol *sym);
 473 struct var_sym_list *expr_to_vsl(struct expression *expr);
 474 void add_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 475 void add_var_sym_expr(struct var_sym_list **list, struct expression *expr);
 476 void del_var_sym(struct var_sym_list **list, const char *var, struct symbol *sym);
 477 int in_var_sym_list(struct var_sym_list *list, const char *var, struct symbol *sym);
 478 struct var_sym_list *clone_var_sym_list(struct var_sym_list *from_vsl);
 479 void merge_var_sym_list(struct var_sym_list **dest, struct var_sym_list *src);
 480 struct var_sym_list *combine_var_sym_lists(struct var_sym_list *one, struct var_sym_list *two);
 481 int var_sym_lists_equiv(struct var_sym_list *one, struct var_sym_list *two);
 482 void free_var_sym_list(struct var_sym_list **list);
 483 void free_var_syms_and_list(struct var_sym_list **list);
 484
 485 /* smatch_tracker */
 486 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym);
 487 void add_tracker(struct tracker_list **list, int owner, const char *name,
 488                 struct symbol *sym);
 489 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr);
 490 void del_tracker(struct tracker_list **list, int owner, const char *name,
 491                 struct symbol *sym);
 492 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
 493                 struct symbol *sym);
 494 void free_tracker_list(struct tracker_list **list);
 495 void free_trackers_and_list(struct tracker_list **list);
 496
 497 /* smatch_conditions */
 498 int in_condition(void);
 499
 500 /* smatch_flow.c */
 501
 502 extern int __in_fake_assign;
 503 extern int __in_fake_parameter_assign;
 504 extern int __in_fake_struct_assign;
 505 extern int in_fake_env;
 506 void smatch (int argc, char **argv);
 507 int inside_loop(void);
 508 int definitely_inside_loop(void);
 509 struct expression *get_switch_expr(void);
 510 int in_expression_statement(void);
 511 void __process_post_op_stack(void);
 512 void __split_expr(struct expression *expr);
 513 void __split_label_stmt(struct statement *stmt);
 514 void __split_stmt(struct statement *stmt);
 515 extern int __in_function_def;
 516 extern int option_assume_loops;
 517 extern int option_two_passes;
 518 extern int option_no_db;
 519 extern int option_file_output;
 520 extern int option_time;
 521 extern struct expression_list *big_expression_stack;
 522 extern struct expression_list *big_condition_stack;
 523 extern struct statement_list *big_statement_stack;
 524 int is_assigned_call(struct expression *expr);
 525 int inlinable(struct expression *expr);
 526 extern int __inline_call;
 527 extern struct expression *__inline_fn;
 528 extern int __in_pre_condition;
 529 extern int __bail_on_rest_of_function;
 530 extern struct statement *__prev_stmt;
 531 extern struct statement *__cur_stmt;
 532 extern struct statement *__next_stmt;
 533 void init_fake_env(void);
 534 void end_fake_env(void);
 535 int time_parsing_function(void);
 536
 537 /* smatch_struct_assignment.c */
 538 struct expression *get_faked_expression(void);
 539 void __fake_struct_member_assignments(struct expression *expr);
 540
 541 /* smatch_project.c */
 542 int is_no_inline_function(const char *function);
 543
 544 /* smatch_conditions */
 545 void __split_whole_condition(struct expression *expr);
 546 void __handle_logic(struct expression *expr);
 547 int is_condition(struct expression *expr);
 548 int __handle_condition_assigns(struct expression *expr);
 549 int __handle_select_assigns(struct expression *expr);
 550 int __handle_expr_statement_assigns(struct expression *expr);
 551
 552 /* smatch_implied.c */
 553 extern int option_debug_implied;
 554 extern int option_debug_related;
 555 struct range_list_stack;
 556 void param_limit_implications(struct expression *expr, int param, char *key, char *value);
 557 struct stree *__implied_case_stree(struct expression *switch_expr,
 558                                    struct range_list *case_rl,
 559                                    struct range_list_stack **remaining_cases,
 560                                    struct stree **raw_stree);
 561 void overwrite_states_using_pool(struct sm_state *gate_sm, struct sm_state *pool_sm);
 562 int assume(struct expression *expr);
 563 void end_assume(void);
 564 int impossible_assumption(struct expression *left, int op, sval_t sval);
 565
 566 /* smatch_extras.c */
 567 int in_warn_on_macro(void);
 568 #define SMATCH_EXTRA 5 /* this is my_id from smatch extra set in smatch.c */
 569 extern int RETURN_ID;
 570
 571 struct data_range {
 572         sval_t min;
 573         sval_t max;
 574 };
 575
 576 #define MTAG_ALIAS_BIT (1ULL << 63)
 577 #define MTAG_OFFSET_MASK 0xfffULL
 578
 579 extern long long valid_ptr_min, valid_ptr_max;
 580 extern sval_t valid_ptr_min_sval, valid_ptr_max_sval;
 581 extern struct range_list *valid_ptr_rl;
 582 static const sval_t array_min_sval = {
 583         .type = &ptr_ctype,
 584         {.value = 100000},
 585 };
 586 static const sval_t array_max_sval = {
 587         .type = &ptr_ctype,
 588         {.value = 199999},
 589 };
 590 static const sval_t text_seg_min = {
 591         .type = &ptr_ctype,
 592         {.value = 100000000},
 593 };
 594 static const sval_t text_seg_max = {
 595         .type = &ptr_ctype,
 596         {.value = 177777777},
 597 };
 598 static const sval_t data_seg_min = {
 599         .type = &ptr_ctype,
 600         {.value = 200000000},
 601 };
 602 static const sval_t data_seg_max = {
 603         .type = &ptr_ctype,
 604         {.value = 277777777},
 605 };
 606 static const sval_t bss_seg_min = {
 607         .type = &ptr_ctype,
 608         {.value = 300000000},
 609 };
 610 static const sval_t bss_seg_max = {
 611         .type = &ptr_ctype,
 612         {.value = 377777777},
 613 };
 614 static const sval_t stack_seg_min = {
 615         .type = &ptr_ctype,
 616         {.value = 400000000},
 617 };
 618 static const sval_t stack_seg_max = {
 619         .type = &ptr_ctype,
 620         {.value = 477777777},
 621 };
 622 static const sval_t kmalloc_seg_min = {
 623         .type = &ptr_ctype,
 624         {.value = 500000000},
 625 };
 626 static const sval_t kmalloc_seg_max = {
 627         .type = &ptr_ctype,
 628         {.value = 577777777},
 629 };
 630 static const sval_t vmalloc_seg_min = {
 631         .type = &ptr_ctype,
 632         {.value = 600000000},
 633 };
 634 static const sval_t vmalloc_seg_max = {
 635         .type = &ptr_ctype,
 636         {.value = 677777777},
 637 };
 638 static const sval_t fn_ptr_min = {
 639         .type = &ptr_ctype,
 640         {.value = 700000000},
 641 };
 642 static const sval_t fn_ptr_max = {
 643         .type = &ptr_ctype,
 644         {.value = 777777777},
 645 };
 646
 647 char *get_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 648 char *map_call_to_other_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 649 char *map_long_to_short_name_sym(const char *name, struct symbol *sym, struct symbol **new_sym);
 650 char *map_long_to_short_name_sym_nostack(const char *name, struct symbol *sym, struct symbol **new_sym);
 651
 652 #define STRLEN_MAX_RET 1010101
 653
 654 /* smatch_absolute.c */
 655 int get_absolute_min_helper(struct expression *expr, sval_t *sval);
 656 int get_absolute_max_helper(struct expression *expr, sval_t *sval);
 657
 658 /* smatch_local_values.c */
 659 int get_local_rl(struct expression *expr, struct range_list **rl);
 660 int get_local_max_helper(struct expression *expr, sval_t *sval);
 661 int get_local_min_helper(struct expression *expr, sval_t *sval);
 662
 663 /* smatch_type_value.c */
 664 int get_db_type_rl(struct expression *expr, struct range_list **rl);
 665 /* smatch_data_val.c */
 666 int get_mtag_rl(struct expression *expr, struct range_list **rl);
 667 /* smatch_array_values.c */
 668 int get_array_rl(struct expression *expr, struct range_list **rl);
 669
 670 /* smatch_states.c */
 671 void __swap_cur_stree(struct stree *stree);
 672 void __push_fake_cur_stree();
 673 struct stree *__pop_fake_cur_stree();
 674 void __free_fake_cur_stree();
 675 void __set_fake_cur_stree_fast(struct stree *stree);
 676 void __pop_fake_cur_stree_fast(void);
 677 void __merge_stree_into_cur(struct stree *stree);
 678
 679 int unreachable(void);
 680 void __set_sm(struct sm_state *sm);
 681 void __set_sm_cur_stree(struct sm_state *sm);
 682 void __set_sm_fake_stree(struct sm_state *sm);
 683 void __set_true_false_sm(struct sm_state *true_state,
 684                         struct sm_state *false_state);
 685 void nullify_path(void);
 686 void __match_nullify_path_hook(const char *fn, struct expression *expr,
 687                                void *unused);
 688 void __unnullify_path(void);
 689 int __path_is_null(void);
 690 void save_all_states(void);
 691 void restore_all_states(void);
 692 void free_goto_stack(void);
 693 void clear_all_states(void);
 694
 695 struct sm_state *get_sm_state(int owner, const char *name,
 696                                 struct symbol *sym);
 697 struct sm_state *get_sm_state_expr(int owner, struct expression *expr);
 698 void __push_true_states(void);
 699 void __use_false_states(void);
 700 void __discard_false_states(void);
 701 void __merge_false_states(void);
 702 void __merge_true_states(void);
 703
 704 void __negate_cond_stacks(void);
 705 void __use_pre_cond_states(void);
 706 void __use_cond_true_states(void);
 707 void __use_cond_false_states(void);
 708 void __push_cond_stacks(void);
 709 void __fold_in_set_states(void);
 710 void __free_set_states(void);
 711 struct stree *__copy_cond_true_states(void);
 712 struct stree *__copy_cond_false_states(void);
 713 struct stree *__pop_cond_true_stack(void);
 714 struct stree *__pop_cond_false_stack(void);
 715 void __and_cond_states(void);
 716 void __or_cond_states(void);
 717 void __save_pre_cond_states(void);
 718 void __discard_pre_cond_states(void);
 719 struct stree *__get_true_states(void);
 720 struct stree *__get_false_states(void);
 721 void __use_cond_states(void);
 722 extern struct state_list *__last_base_slist;
 723
 724 void __push_continues(void);
 725 void __discard_continues(void);
 726 void __process_continues(void);
 727 void __merge_continues(void);
 728
 729 void __push_breaks(void);
 730 void __process_breaks(void);
 731 int __has_breaks(void);
 732 void __merge_breaks(void);
 733 void __use_breaks(void);
 734
 735 void __save_switch_states(struct expression *switch_expr);
 736 void __discard_switches(void);
 737 int have_remaining_cases(void);
 738 void __merge_switches(struct expression *switch_expr, struct range_list *case_rl);
 739 void __push_default(void);
 740 void __set_default(void);
 741 int __pop_default(void);
 742
 743 void __push_conditions(void);
 744 void __discard_conditions(void);
 745
 746 void __save_gotos(const char *name, struct symbol *sym);
 747 void __merge_gotos(const char *name, struct symbol *sym);
 748
 749 void __print_cur_stree(void);
 750
 751 /* smatch_hooks.c */
 752 void __pass_to_client(void *data, enum hook_type type);
 753 void __pass_to_client_no_data(enum hook_type type);
 754 void __pass_case_to_client(struct expression *switch_expr,
 755                            struct range_list *rl);
 756 int __has_merge_function(int client_id);
 757 struct smatch_state *__client_merge_function(int owner,
 758                                              struct smatch_state *s1,
 759                                              struct smatch_state *s2);
 760 struct smatch_state *__client_unmatched_state_function(struct sm_state *sm);
 761 void call_pre_merge_hook(struct sm_state *sm);
 762 void __push_scope_hooks(void);
 763 void __call_scope_hooks(void);
 764
 765 /* smatch_function_hooks.c */
 766 void create_function_hook_hash(void);
 767 void __match_initializer_call(struct symbol *sym);
 768
 769 /* smatch_db.c */
 770 enum info_type {
 771         INTERNAL        = 0,
 772         /*
 773          * Changing these numbers is a pain.  Don't do it.  If you ever use a
 774          * number it can't be re-used right away so there may be gaps.
 775          * We select these in order by type so if the order matters, then give
 776          * it a number below 100-999,9000-9999 ranges. */
 777
 778         PARAM_CLEARED   = 101,
 779         PARAM_LIMIT     = 103,
 780         PARAM_FILTER    = 104,
 781
 782         PARAM_VALUE     = 1001,
 783         BUF_SIZE        = 1002,
 784         USER_DATA       = 1003,
 785         CAPPED_DATA     = 1004,
 786         RETURN_VALUE    = 1005,
 787         DEREFERENCE     = 1006,
 788         RANGE_CAP       = 1007,
 789         LOCK_HELD       = 1008,
 790         LOCK_RELEASED   = 1009,
 791         ABSOLUTE_LIMITS = 1010,
 792         PARAM_ADD       = 1012,
 793         PARAM_FREED     = 1013,
 794         DATA_SOURCE     = 1014,
 795         FUZZY_MAX       = 1015,
 796         STR_LEN         = 1016,
 797         ARRAY_LEN       = 1017,
 798         CAPABLE         = 1018,
 799         NS_CAPABLE      = 1019,
 800         CONTAINER       = 1020,
 801         CASTED_CALL     = 1021,
 802         TYPE_LINK       = 1022,
 803         UNTRACKED_PARAM = 1023,
 804         CULL_PATH       = 1024,
 805         PARAM_SET       = 1025,
 806         PARAM_USED      = 1026,
 807         BYTE_UNITS      = 1027,
 808         COMPARE_LIMIT   = 1028,
 809         PARAM_COMPARE   = 1029,
 810         CONSTRAINT      = 1031,
 811         PASSES_TYPE     = 1032,
 812         CONSTRAINT_REQUIRED = 1033,
 813         NOSPEC          = 1035,
 814         NOSPEC_WB       = 1036,
 815         STMT_CNT        = 1037,
 816         TERMINATED      = 1038,
 817
 818         /* put random temporary stuff in the 7000-7999 range for testing */
 819         USER_DATA3      = 8017,
 820         USER_DATA3_SET  = 9017,
 821         NO_OVERFLOW     = 8018,
 822         NO_OVERFLOW_SIMPLE = 8019,
 823         LOCKED          = 8020,
 824         UNLOCKED        = 8021,
 825         SET_FS          = 8022,
 826         ATOMIC_INC      = 8023,
 827         ATOMIC_DEC      = 8024,
 828         NO_SIDE_EFFECT  = 8025,
 829         FN_ARG_LINK     = 8028,
 830         DATA_VALUE      = 8029,
 831         ARRAYSIZE_ARG   = 8033,
 832         SIZEOF_ARG      = 8034,
 833         MEMORY_TAG      = 8036,
 834         MTAG_ASSIGN     = 8035,
 835         STRING_VALUE    = 8041,
 836 };
 837
 838 extern struct sqlite3 *smatch_db;
 839 extern struct sqlite3 *mem_db;
 840 extern struct sqlite3 *cache_db;
 841
 842 void db_ignore_states(int id);
 843 void select_caller_info_hook(void (*callback)(const char *name, struct symbol *sym, char *key, char *value), int type);
 844 void add_member_info_callback(int owner, void (*callback)(struct expression *call, int param, char *printed_name, struct sm_state *sm));
 845 void add_split_return_callback(void (*fn)(int return_id, char *return_ranges, struct expression *returned_expr));
 846 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));
 847 void select_call_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 848 void select_return_implies_hook(int type, void (*callback)(struct expression *call, struct expression *arg, char *key, char *value));
 849 struct range_list *db_return_vals(struct expression *expr);
 850 struct range_list *db_return_vals_from_str(const char *fn_name);
 851 char *return_state_to_var_sym(struct expression *expr, int param, const char *key, struct symbol **sym);
 852 char *get_chunk_from_key(struct expression *arg, char *key, struct symbol **sym, struct var_sym_list **vsl);
 853 char *get_variable_from_key(struct expression *arg, const char *key, struct symbol **sym);
 854 const char *state_name_to_param_name(const char *state_name, const char *param_name);
 855 const char *get_param_name_var_sym(const char *name, struct symbol *sym);
 856 const char *get_param_name(struct sm_state *sm);
 857 const char *get_mtag_name_var_sym(const char *state_name, struct symbol *sym);
 858 const char *get_mtag_name_expr(struct expression *expr);
 859 char *get_data_info_name(struct expression *expr);
 860
 861 char *escape_newlines(const char *str);
 862 void sql_exec(struct sqlite3 *db, int (*callback)(void*, int, char**, char**), void *data, const char *sql);
 863
 864 #define sql_helper(db, call_back, data, sql...)                                 \
 865 do {                                                                            \
 866         char sql_txt[1024];                                                     \
 867                                                                                 \
 868         sqlite3_snprintf(sizeof(sql_txt), sql_txt, sql);                        \
 869         sm_debug("debug: %s\n", sql_txt);                                       \
 870         sql_exec(db, call_back, data, sql_txt);                                 \
 871 } while (0)
 872
 873
 874 #define run_sql(call_back, data, sql...)                                        \
 875 do {                                                                            \
 876         if (option_no_db)                                                       \
 877                 break;                                                          \
 878         sql_helper(smatch_db, call_back, data, sql);                            \
 879 } while (0)
 880
 881 #define mem_sql(call_back, data, sql...)                                        \
 882         sql_helper(mem_db, call_back, data, sql)
 883
 884 #define cache_sql(call_back, data, sql...)                                      \
 885         sql_helper(cache_db, call_back, data, sql)
 886
 887 #define sql_insert_helper(table, db, ignore, late, values...)                   \
 888 do {                                                                            \
 889         struct sqlite3 *_db = db;                                               \
 890                                                                                 \
 891         if (__inline_fn && !_db)                                                \
 892                 _db = mem_db;                                                   \
 893         if (_db) {                                                              \
 894                 char buf[1024];                                                 \
 895                 char *err, *p = buf;                                            \
 896                 int rc;                                                         \
 897                                                                                 \
 898                 p += snprintf(p, buf + sizeof(buf) - p,                         \
 899                               "insert %sinto %s values (",                      \
 900                               ignore ? "or ignore " : "", #table);              \
 901                 p += snprintf(p, buf + sizeof(buf) - p, values);                \
 902                 p += snprintf(p, buf + sizeof(buf) - p, ");");                  \
 903                 sm_debug("mem-db: %s\n", buf);                                  \
 904                 rc = sqlite3_exec(_db, buf, NULL, NULL, &err);                  \
 905                 if (rc != SQLITE_OK) {                                          \
 906                         sm_ierror("SQL error #2: %s", err);                     \
 907                         sm_ierror("SQL: '%s'", buf);                            \
 908                         parse_error = 1;                                        \
 909                 }                                                               \
 910                 break;                                                          \
 911         }                                                                       \
 912         if (option_info) {                                                      \
 913                 FILE *tmp_fd = sm_outfd;                                        \
 914                 sm_outfd = sql_outfd;                                           \
 915                 sm_prefix();                                                    \
 916                 sm_printf("SQL%s: insert %sinto " #table " values(",            \
 917                           late ? "_late" : "", ignore ? "or ignore " : "");     \
 918                 sm_printf(values);                                              \
 919                 sm_printf(");\n");                                              \
 920                 sm_outfd = tmp_fd;                                              \
 921         }                                                                       \
 922 } while (0)
 923
 924 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, 0, values);
 925 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 0, 1, 0, values);
 926 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 0, 1, values);
 927 #define sql_insert_cache(table, values...) sql_insert_helper(table, cache_db, 1, 0, values);
 928
 929 char *get_static_filter(struct symbol *sym);
 930
 931 void sql_insert_return_states(int return_id, const char *return_ranges,
 932                 int type, int param, const char *key, const char *value);
 933 void sql_insert_caller_info(struct expression *call, int type, int param,
 934                 const char *key, const char *value);
 935 void sql_insert_function_ptr(const char *fn, const char *struct_name);
 936 void sql_insert_return_values(const char *return_values);
 937 void sql_insert_return_implies(int type, int param, const char *key, const char *value);
 938 void sql_insert_function_type_size(const char *member, const char *ranges);
 939 void sql_insert_function_type_info(int type, const char *struct_type, const char *member, const char *value);
 940 void sql_insert_type_info(int type, const char *member, const char *value);
 941 void sql_insert_local_values(const char *name, const char *value);
 942 void sql_insert_function_type_value(const char *type, const char *value);
 943 void sql_insert_function_type(int param, const char *value);
 944 void sql_insert_parameter_name(int param, const char *value);
 945 void sql_insert_data_info(struct expression *data, int type, const char *value);
 946 void sql_insert_data_info_var_sym(const char *var, struct symbol *sym, int type, const char *value);
 947 void sql_save_constraint(const char *con);
 948 void sql_save_constraint_required(const char *data, int op, const char *limit);
 949 void sql_copy_constraint_required(const char *new_limit, const char *old_limit);
 950 void sql_insert_fn_ptr_data_link(const char *ptr, const char *data);
 951 void sql_insert_fn_data_link(struct expression *fn, int type, int param, const char *key, const char *value);
 952 void sql_insert_mtag_about(mtag_t tag, const char *left_name, const char *right_name);
 953 void insert_mtag_data(sval_t sval, struct range_list *rl);
 954 void sql_insert_mtag_map(mtag_t tag, int offset, mtag_t container);
 955 void sql_insert_mtag_alias(mtag_t orig, mtag_t alias);
 956 int mtag_map_select_container(mtag_t tag, int offset, mtag_t *container);
 957 int mtag_map_select_tag(mtag_t container, int offset, mtag_t *tag);
 958
 959 void sql_select_return_states(const char *cols, struct expression *call,
 960         int (*callback)(void*, int, char**, char**), void *info);
 961 void sql_select_call_implies(const char *cols, struct expression *call,
 962         int (*callback)(void*, int, char**, char**));
 963
 964 void open_smatch_db(char *db_file);
 965
 966 /* smatch_files.c */
 967 int open_data_file(const char *filename);
 968 int open_schema_file(const char *schema);
 969 struct token *get_tokens_file(const char *filename);
 970
 971 /* smatch.c */
 972 extern char *option_debug_check;
 973 extern char *option_project_str;
 974 extern char *bin_dir;
 975 extern char *data_dir;
 976 extern int option_no_data;
 977 extern int option_full_path;
 978 extern int option_param_mapper;
 979 extern int option_call_tree;
 980 extern int num_checks;
 981
 982 enum project_type {
 983         PROJ_NONE,
 984         PROJ_KERNEL,
 985         PROJ_WINE,
 986         PROJ_ILLUMOS_KERNEL,
 987         PROJ_ILLUMOS_USER,
 988         PROJ_UNKNOWN,
 989 };
 990 extern enum project_type option_project;
 991 const char *check_name(unsigned short id);
 992 int id_from_name(const char *name);
 993
 994
 995 /* smatch_buf_size.c */
 996 int get_array_size(struct expression *expr);
 997 int get_array_size_bytes(struct expression *expr);
 998 int get_array_size_bytes_min(struct expression *expr);
 999 int get_array_size_bytes_max(struct expression *expr);
1000 struct range_list *get_array_size_bytes_rl(struct expression *expr);
1001 int get_real_array_size(struct expression *expr);
1002 int last_member_is_resizable(struct symbol *type);
1003 /* smatch_strlen.c */
1004 int get_implied_strlen(struct expression *expr, struct range_list **rl);
1005 int get_size_from_strlen(struct expression *expr);
1006
1007 /* smatch_capped.c */
1008 int is_capped(struct expression *expr);
1009 int is_capped_var_sym(const char *name, struct symbol *sym);
1010
1011 /* check_user_data.c */
1012 int is_user_macro(struct expression *expr);
1013 int is_user_data(struct expression *expr);
1014 int is_capped_user_data(struct expression *expr);
1015 int implied_user_data(struct expression *expr, struct range_list **rl);
1016 struct stree *get_user_stree(void);
1017 int get_user_rl(struct expression *expr, struct range_list **rl);
1018 int get_user_rl_spammy(struct expression *expr, struct range_list **rl);
1019 int is_user_rl(struct expression *expr);
1020 int get_user_rl_var_sym(const char *name, struct symbol *sym, struct range_list **rl);
1021
1022 /* check_locking.c */
1023 void print_held_locks();
1024
1025 /* check_assigned_expr.c */
1026 struct expression *get_assigned_expr(struct expression *expr);
1027 struct expression *get_assigned_expr_name_sym(const char *name, struct symbol *sym);
1028 /* smatch_return_to_param.c */
1029 void __add_return_to_param_mapping(struct expression *assign, const char *return_string);
1030 char *map_call_to_param_name_sym(struct expression *expr, struct symbol **sym);
1031
1032 /* smatch_comparison.c */
1033 struct compare_data {
1034         /* The ->left and ->right expression pointers might be NULL (I'm lazy) */
1035         struct expression *left;
1036         const char *left_var;
1037         struct var_sym_list *left_vsl;
1038         int comparison;
1039         struct expression *right;
1040         const char *right_var;
1041         struct var_sym_list *right_vsl;
1042 };
1043 DECLARE_ALLOCATOR(compare_data);
1044 struct smatch_state *alloc_compare_state(
1045                 struct expression *left,
1046                 const char *left_var, struct var_sym_list *left_vsl,
1047                 int comparison,
1048                 struct expression *right,
1049                 const char *right_var, struct var_sym_list *right_vsl);
1050 int filter_comparison(int orig, int op);
1051 int merge_comparisons(int one, int two);
1052 int combine_comparisons(int left_compare, int right_compare);
1053 int state_to_comparison(struct smatch_state *state);
1054 struct smatch_state *merge_compare_states(struct smatch_state *s1, struct smatch_state *s2);
1055 int get_comparison(struct expression *left, struct expression *right);
1056 int get_comparison_strings(const char *one, const char *two);
1057 int possible_comparison(struct expression *a, int comparison, struct expression *b);
1058 struct state_list *get_all_comparisons(struct expression *expr);
1059 struct state_list *get_all_possible_equal_comparisons(struct expression *expr);
1060 void __add_return_comparison(struct expression *call, const char *range);
1061 void __add_comparison_info(struct expression *expr, struct expression *call, const char *range);
1062 char *get_printed_param_name(struct expression *call, const char *param_name, struct symbol *param_sym);
1063 char *name_sym_to_param_comparison(const char *name, struct symbol *sym);
1064 char *expr_equal_to_param(struct expression *expr, int ignore);
1065 char *expr_lte_to_param(struct expression *expr, int ignore);
1066 char *expr_param_comparison(struct expression *expr, int ignore);
1067 int flip_comparison(int op);
1068 int negate_comparison(int op);
1069 int remove_unsigned_from_comparison(int op);
1070 int param_compare_limit_is_impossible(struct expression *expr, int left_param, char *left_key, char *value);
1071 void filter_by_comparison(struct range_list **rl, int comparison, struct range_list *right);
1072 struct sm_state *comparison_implication_hook(struct expression *expr,
1073                         struct state_list **true_stack,
1074                         struct state_list **false_stack);
1075 void __compare_param_limit_hook(struct expression *left_expr, struct expression *right_expr,
1076                                 const char *state_name,
1077                                 struct smatch_state *true_state, struct smatch_state *false_state);
1078 int impossibly_high_comparison(struct expression *expr);
1079
1080 /* smatch_sval.c */
1081 sval_t *sval_alloc(sval_t sval);
1082 sval_t *sval_alloc_permanent(sval_t sval);
1083 sval_t sval_blank(struct expression *expr);
1084 sval_t sval_type_val(struct symbol *type, long long val);
1085 sval_t sval_from_val(struct expression *expr, long long val);
1086 int sval_is_ptr(sval_t sval);
1087 int sval_unsigned(sval_t sval);
1088 int sval_signed(sval_t sval);
1089 int sval_bits(sval_t sval);
1090 int sval_bits_used(sval_t sval);
1091 int sval_is_negative(sval_t sval);
1092 int sval_is_positive(sval_t sval);
1093 int sval_is_min(sval_t sval);
1094 int sval_is_max(sval_t sval);
1095 int sval_is_a_min(sval_t sval);
1096 int sval_is_a_max(sval_t sval);
1097 int sval_is_negative_min(sval_t sval);
1098 int sval_cmp_t(struct symbol *type, sval_t one, sval_t two);
1099 int sval_cmp_val(sval_t one, long long val);
1100 sval_t sval_min(sval_t one, sval_t two);
1101 sval_t sval_max(sval_t one, sval_t two);
1102 int sval_too_low(struct symbol *type, sval_t sval);
1103 int sval_too_high(struct symbol *type, sval_t sval);
1104 int sval_fits(struct symbol *type, sval_t sval);
1105 sval_t sval_cast(struct symbol *type, sval_t sval);
1106 sval_t sval_preop(sval_t sval, int op);
1107 sval_t sval_binop(sval_t left, int op, sval_t right);
1108 int sval_binop_overflows(sval_t left, int op, sval_t right);
1109 int sval_binop_overflows_no_sign(sval_t left, int op, sval_t right);
1110 unsigned long long fls_mask(unsigned long long uvalue);
1111 unsigned long long sval_fls_mask(sval_t sval);
1112 const char *sval_to_str(sval_t sval);
1113 const char *sval_to_numstr(sval_t sval);
1114 sval_t ll_to_sval(long long val);
1115
1116 /* smatch_string_list.c */
1117 int list_has_string(struct string_list *str_list, const char *str);
1118 void insert_string(struct string_list **str_list, const char *str);
1119 struct string_list *clone_str_list(struct string_list *orig);
1120 struct string_list *combine_string_lists(struct string_list *one, struct string_list *two);
1121
1122 /* smatch_start_states.c */
1123 struct stree *get_start_states(void);
1124
1125 /* smatch_recurse.c */
1126 int has_symbol(struct expression *expr, struct symbol *sym);
1127 int has_variable(struct expression *expr, struct expression *var);
1128 int has_inc_dec(struct expression *expr);
1129
1130 /* smatch_stored_conditions.c */
1131 struct smatch_state *get_stored_condition(struct expression *expr);
1132 struct expression_list *get_conditions(struct expression *expr);
1133 struct sm_state *stored_condition_implication_hook(struct expression *expr,
1134                         struct state_list **true_stack,
1135                         struct state_list **false_stack);
1136
1137 /* check_string_len.c */
1138 int get_formatted_string_size(struct expression *call, int arg);
1139
1140 /* smatch_param_set.c */
1141 int param_was_set(struct expression *expr);
1142 int param_was_set_var_sym(const char *name, struct symbol *sym);
1143 /* smatch_param_filter.c */
1144 int param_has_filter_data(struct sm_state *sm);
1145
1146 /* smatch_links.c */
1147 void set_up_link_functions(int id, int linkid);
1148 struct smatch_state *merge_link_states(struct smatch_state *s1, struct smatch_state *s2);
1149 void store_link(int link_id, const char *name, struct symbol *sym, const char *link_name, struct symbol *link_sym);
1150
1151 /* smatch_auto_copy.c */
1152 void set_auto_copy(int owner);
1153
1154 /* check_buf_comparison */
1155 struct expression *get_size_variable(struct expression *buf);
1156 struct expression *get_array_variable(struct expression *size);
1157
1158 /* smatch_untracked_param.c */
1159 void mark_untracked(struct expression *expr, int param, const char *key, const char *value);
1160 void add_untracked_param_hook(void (func)(struct expression *call, int param));
1161 void mark_all_params_untracked(int return_id, char *return_ranges, struct expression *expr);
1162
1163 /* smatch_strings.c */
1164 struct state_list *get_strings(struct expression *expr);
1165 struct expression *fake_string_from_mtag(mtag_t tag);
1166
1167 /* smatch_estate.c */
1168 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
1169
1170 /* smatch_address.c */
1171 int get_address_rl(struct expression *expr, struct range_list **rl);
1172 int get_member_offset(struct symbol *type, const char *member_name);
1173 int get_member_offset_from_deref(struct expression *expr);
1174
1175 /* for now this is in smatch_used_parameter.c */
1176 void __get_state_hook(int owner, const char *name, struct symbol *sym);
1177
1178 /* smatch_buf_comparison.c */
1179 int db_var_is_array_limit(struct expression *array, const char *name, struct var_sym_list *vsl);
1180
1181 struct stree *get_all_return_states(void);
1182 struct stree_stack *get_all_return_strees(void);
1183 int on_atomic_dec_path(void);
1184 int was_inced(const char *name, struct symbol *sym);
1185
1186 /* smatch_constraints.c */
1187 char *get_constraint_str(struct expression *expr);
1188 struct constraint_list *get_constraints(struct expression *expr);
1189 char *unmet_constraint(struct expression *data, struct expression *offset);
1190 char *get_required_constraint(const char *data_str);
1191
1192 /* smatch_container_of.c */
1193 int get_param_from_container_of(struct expression *expr);
1194 int get_offset_from_container_of(struct expression *expr);
1195
1196 /* smatch_mtag.c */
1197 int get_string_mtag(struct expression *expr, mtag_t *tag);
1198 int get_toplevel_mtag(struct symbol *sym, mtag_t *tag);
1199 int get_mtag(struct expression *expr, mtag_t *tag);
1200 int get_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1201 int create_mtag_alias(mtag_t tag, struct expression *expr, mtag_t *new);
1202 int expr_to_mtag_offset(struct expression *expr, mtag_t *tag, int *offset);
1203 void update_mtag_data(struct expression *expr);
1204 int get_mtag_sval(struct expression *expr, sval_t *sval);
1205 int get_mtag_addr_sval(struct expression *expr, sval_t *sval);
1206
1207 /* Trinity fuzzer stuff */
1208 const char *get_syscall_arg_type(struct symbol *sym);
1209
1210 /* smatch_mem_tracker.c */
1211 extern int option_mem;
1212 unsigned long get_max_memory(void);
1213
1214 /* check_is_nospec.c */
1215 bool is_nospec(struct expression *expr);
1216
1217 /* smatch_nul_terminator.c */
1218 bool is_nul_terminated(struct expression *expr);
1219
1220 static inline int type_bits(struct symbol *type)
1221 {
1222         if (!type)
1223                 return 0;
1224         if (type->type == SYM_PTR)  /* Sparse doesn't set this for &pointers */
1225                 return bits_in_pointer;
1226         if (type->type == SYM_ARRAY)
1227                 return bits_in_pointer;
1228         if (!type->examined)
1229                 examine_symbol_type(type);
1230         return type->bit_size;
1231 }
1232
1233 static inline bool type_is_ptr(struct symbol *type)
1234 {
1235         return type && (type->type == SYM_PTR || type->type == SYM_ARRAY);
1236 }
1237
1238 static inline int type_unsigned(struct symbol *base_type)
1239 {
1240         if (!base_type)
1241                 return 0;
1242         if (base_type->ctype.modifiers & MOD_UNSIGNED)
1243                 return 1;
1244         return 0;
1245 }
1246
1247 static inline int type_positive_bits(struct symbol *type)
1248 {
1249         if (!type)
1250                 return 0;
1251         if (type->type == SYM_ARRAY)
1252                 return bits_in_pointer - 1;
1253         if (type_unsigned(type))
1254                 return type_bits(type);
1255         return type_bits(type) - 1;
1256 }
1257
1258 static inline int sval_positive_bits(sval_t sval)
1259 {
1260         return type_positive_bits(sval.type);
1261 }
1262
1263 /*
1264  * Returns -1 if one is smaller, 0 if they are the same and 1 if two is larger.
1265  */
1266 static inline int sval_cmp(sval_t one, sval_t two)
1267 {
1268         struct symbol *type;
1269
1270         type = one.type;
1271         if (sval_positive_bits(two) > sval_positive_bits(one))
1272                 type = two.type;
1273         if (type_bits(type) < 31)
1274                 type = &int_ctype;
1275
1276         one = sval_cast(type, one);
1277         two = sval_cast(type, two);
1278
1279         if (type_unsigned(type)) {
1280                 if (one.uvalue < two.uvalue)
1281                         return -1;
1282                 if (one.uvalue == two.uvalue)
1283                         return 0;
1284                 return 1;
1285         }
1286         /* fix me handle type promotion and unsigned values */
1287         if (one.value < two.value)
1288                 return -1;
1289         if (one.value == two.value)
1290                 return 0;
1291         return 1;
1292 }
1293
1294 #endif      /* !SMATCH_H_ */