2 * Copyright (C) 2010 Dan Carpenter.
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.
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.
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
24 #include "smatch_slist.h"
25 #include "smatch_extra.h"
28 static sqlite3
*mem_db
;
32 #define sql_insert_helper(table, ignore, values...) \
36 char *err, *p = buf; \
42 p += snprintf(p, buf + sizeof(buf) - p, \
43 "insert %sinto %s values (", \
44 ignore ? "or ignore " : "", #table); \
45 p += snprintf(p, buf + sizeof(buf) - p, values); \
46 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
47 sm_debug("in-mem: %s\n", buf); \
48 rc = sqlite3_exec(mem_db, buf, NULL, NULL, &err); \
49 if (rc != SQLITE_OK) { \
50 fprintf(stderr, "SQL error #2: %s\n", err); \
51 fprintf(stderr, "SQL: '%s'\n", buf); \
58 sm_printf("SQL: insert %sinto " #table " values(", \
59 ignore ? "or ignore " : ""); \
65 #define sql_insert(table, values...) sql_insert_helper(table, 0, values);
66 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 1, values);
70 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
72 ALLOCATOR(def_callback
, "definition db hook callbacks");
73 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
74 static struct callback_list
*select_caller_info_callbacks
;
76 struct member_info_callback
{
78 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
80 ALLOCATOR(member_info_callback
, "caller_info callbacks");
81 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
82 static struct member_info_cb_list
*member_callbacks
;
84 struct returned_state_callback
{
85 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
87 ALLOCATOR(returned_state_callback
, "returned state callbacks");
88 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
89 static struct returned_state_cb_list
*returned_state_callbacks
;
91 struct returned_member_callback
{
93 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
95 ALLOCATOR(returned_member_callback
, "returned member callbacks");
96 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
97 static struct returned_member_cb_list
*returned_member_callbacks
;
99 struct call_implies_callback
{
101 void (*callback
)(struct expression
*arg
, char *key
, char *value
);
103 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
104 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
105 static struct call_implies_cb_list
*call_implies_cb_list
;
107 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
111 for (i
= 0; i
< argc
; i
++) {
114 sm_printf("%s", argv
[i
]);
120 void debug_sql(const char *sql
)
125 sql_exec(print_sql_output
, NULL
, sql
);
128 void debug_mem_sql(const char *sql
)
133 sql_mem_exec(print_sql_output
, NULL
, sql
);
136 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
141 if (option_no_db
|| !db
)
144 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
145 if (rc
!= SQLITE_OK
&& !parse_error
) {
146 fprintf(stderr
, "SQL error #2: %s\n", err
);
147 fprintf(stderr
, "SQL: '%s'\n", sql
);
152 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
160 rc
= sqlite3_exec(mem_db
, sql
, callback
, data
, &err
);
161 if (rc
!= SQLITE_OK
) {
162 fprintf(stderr
, "SQL error #2: %s\n", err
);
163 fprintf(stderr
, "SQL: '%s'\n", sql
);
168 static int replace_count
;
169 static char **replace_table
;
170 static const char *replace_return_ranges(const char *return_ranges
)
174 if (!get_function()) {
175 /* I have no idea why EXPORT_SYMBOL() is here */
176 return return_ranges
;
178 for (i
= 0; i
< replace_count
; i
+= 3) {
179 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
180 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
181 return replace_table
[i
+ 2];
184 return return_ranges
;
187 void sql_insert_return_states(int return_id
, const char *return_ranges
,
188 int type
, int param
, const char *key
, const char *value
)
190 if (key
&& strlen(key
) >= 80)
192 return_ranges
= replace_return_ranges(return_ranges
);
193 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
194 get_base_file(), get_function(), (unsigned long)__inline_fn
,
195 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
198 static struct string_list
*common_funcs
;
199 static int is_common_function(const char *fn
)
203 if (strncmp(fn
, "__builtin_", 10) == 0)
206 FOR_EACH_PTR(common_funcs
, tmp
) {
207 if (strcmp(tmp
, fn
) == 0)
209 } END_FOR_EACH_PTR(tmp
);
214 static char *function_signature(void)
216 return type_to_str(get_real_base_type(cur_func_sym
));
219 void sql_insert_caller_info(struct expression
*call
, int type
,
220 int param
, const char *key
, const char *value
)
224 if (!option_info
&& !__inline_call
)
227 if (key
&& strlen(key
) >= 80)
230 fn
= get_fnptr_name(call
->fn
);
236 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
237 get_base_file(), get_function(), fn
, (unsigned long)call
,
238 is_static(call
->fn
), type
, param
, key
, value
);
244 if (is_common_function(fn
))
247 sm_msg("SQL_caller_info: insert into caller_info values ("
248 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
249 get_base_file(), get_function(), fn
, is_static(call
->fn
),
250 type
, param
, key
, value
);
255 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
257 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
261 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
263 sql_insert(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', %s", get_base_file(),
264 get_function(), (unsigned long)__inline_fn
, fn_static(),
265 type
, param
, key
, value
);
268 void sql_insert_function_type_size(const char *member
, const char *ranges
)
270 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
273 void sql_insert_local_values(const char *name
, const char *value
)
275 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
278 void sql_insert_function_type_value(const char *type
, const char *value
)
280 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
283 void sql_insert_function_type(int param
, const char *value
)
285 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
286 get_base_file(), get_function(), fn_static(), param
, value
);
289 void sql_insert_parameter_name(int param
, const char *value
)
291 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
292 get_base_file(), get_function(), fn_static(), param
, value
);
295 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
299 data_name
= get_data_info_name(data
);
302 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
303 is_static(data
) ? get_base_file() : "extern",
304 data_name
, type
, value
);
307 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
309 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
310 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
314 void sql_save_constraint(const char *con
)
319 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
322 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
324 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
327 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
329 sql_insert(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
332 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
334 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
337 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
338 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
339 fn
->symbol
->ident
->name
,
340 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
341 type
, param
, key
, value
);
344 char *get_static_filter(struct symbol
*sym
)
346 static char sql_filter
[1024];
348 /* This can only happen on buggy code. Return invalid SQL. */
350 sql_filter
[0] = '\0';
354 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
355 snprintf(sql_filter
, sizeof(sql_filter
),
356 "file = '%s' and function = '%s' and static = '1'",
357 get_base_file(), sym
->ident
->name
);
359 snprintf(sql_filter
, sizeof(sql_filter
),
360 "function = '%s' and static = '0'", sym
->ident
->name
);
366 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
368 int *row_count
= _row_count
;
373 *row_count
= atoi(argv
[0]);
377 static void sql_select_return_states_pointer(const char *cols
,
378 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
381 int return_count
= 0;
383 ptr
= get_fnptr_name(call
->fn
);
387 run_sql(get_row_count
, &return_count
,
388 "select count(*) from return_states join function_ptr "
389 "where return_states.function == function_ptr.function and "
390 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
391 /* The magic number 100 is just from testing on the kernel. */
392 if (return_count
> 100)
395 run_sql(callback
, info
,
396 "select %s from return_states join function_ptr where "
397 "return_states.function == function_ptr.function and ptr = '%s' "
398 "and searchable = 1 "
399 "order by function_ptr.file, return_states.file, return_id, type;",
403 static int is_local_symbol(struct expression
*expr
)
405 if (expr
->type
!= EXPR_SYMBOL
)
407 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
412 void sql_select_return_states(const char *cols
, struct expression
*call
,
413 int (*callback
)(void*, int, char**, char**), void *info
)
417 if (is_fake_call(call
))
420 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
421 sql_select_return_states_pointer(cols
, call
, callback
, info
);
425 if (inlinable(call
->fn
)) {
426 mem_sql(callback
, info
,
427 "select %s from return_states where call_id = '%lu' order by return_id, type;",
428 cols
, (unsigned long)call
);
432 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
433 get_static_filter(call
->fn
->symbol
));
434 if (row_count
> 3000)
437 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
438 cols
, get_static_filter(call
->fn
->symbol
));
441 void sql_select_call_implies(const char *cols
, struct expression
*call
,
442 int (*callback
)(void*, int, char**, char**))
444 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
447 if (inlinable(call
->fn
)) {
448 mem_sql(callback
, call
,
449 "select %s from call_implies where call_id = '%lu';",
450 cols
, (unsigned long)call
);
454 run_sql(callback
, call
, "select %s from call_implies where %s;",
455 cols
, get_static_filter(call
->fn
->symbol
));
458 struct select_caller_info_data
{
459 struct stree
*final_states
;
464 static void sql_select_caller_info(struct select_caller_info_data
*data
,
465 const char *cols
, struct symbol
*sym
,
466 int (*callback
)(void*, int, char**, char**))
469 mem_sql(callback
, data
,
470 "select %s from caller_info where call_id = %lu;",
471 cols
, (unsigned long)__inline_fn
);
475 run_sql(callback
, data
,
476 "select %s from caller_info where %s order by call_id;",
477 cols
, get_static_filter(sym
));
480 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
482 struct def_callback
*def_callback
= __alloc_def_callback(0);
484 def_callback
->hook_type
= type
;
485 def_callback
->callback
= callback
;
486 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
490 * These call backs are used when the --info option is turned on to print struct
491 * member information. For example foo->bar could have a state in
492 * smatch_extra.c and also check_user.c.
494 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
496 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
498 member_callback
->owner
= owner
;
499 member_callback
->callback
= callback
;
500 add_ptr_list(&member_callbacks
, member_callback
);
503 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
505 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
507 callback
->callback
= fn
;
508 add_ptr_list(&returned_state_callbacks
, callback
);
511 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
))
513 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
515 member_callback
->owner
= owner
;
516 member_callback
->callback
= callback
;
517 add_ptr_list(&returned_member_callbacks
, member_callback
);
520 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*arg
, char *key
, char *value
))
522 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
525 cb
->callback
= callback
;
526 add_ptr_list(&call_implies_cb_list
, cb
);
530 struct expression
*static_returns_call
;
531 struct symbol
*return_type
;
532 struct range_list
*return_range_list
;
535 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
537 struct return_info
*ret_info
= _ret_info
;
538 struct range_list
*rl
;
539 struct expression
*call_expr
= ret_info
->static_returns_call
;
543 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
544 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
548 struct range_list
*db_return_vals(struct expression
*expr
)
550 struct return_info ret_info
= {};
554 if (is_fake_call(expr
))
557 snprintf(buf
, sizeof(buf
), "return %p", expr
);
558 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
560 return clone_rl(estate_rl(sm
->state
));
561 ret_info
.static_returns_call
= expr
;
562 ret_info
.return_type
= get_type(expr
);
563 if (!ret_info
.return_type
)
566 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
569 ret_info
.return_range_list
= NULL
;
570 if (inlinable(expr
->fn
)) {
571 mem_sql(db_return_callback
, &ret_info
,
572 "select distinct return from return_states where call_id = '%lu';",
573 (unsigned long)expr
);
575 run_sql(db_return_callback
, &ret_info
,
576 "select distinct return from return_states where %s;",
577 get_static_filter(expr
->fn
->symbol
));
579 return ret_info
.return_range_list
;
582 struct range_list
*db_return_vals_from_str(const char *fn_name
)
584 struct return_info ret_info
;
586 ret_info
.static_returns_call
= NULL
;
587 ret_info
.return_type
= &llong_ctype
;
588 ret_info
.return_range_list
= NULL
;
590 run_sql(db_return_callback
, &ret_info
,
591 "select distinct return from return_states where function = '%s';",
593 return ret_info
.return_range_list
;
596 static void match_call_marker(struct expression
*expr
)
600 type
= get_type(expr
->fn
);
601 if (type
&& type
->type
== SYM_PTR
)
602 type
= get_real_base_type(type
);
605 * we just want to record something in the database so that if we have
606 * two calls like: frob(4); frob(some_unkown); then on the receiving
607 * side we know that sometimes frob is called with unknown parameters.
610 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
613 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
614 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
620 char printed_name
[256];
623 expr
= strip_expr(expr
);
624 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
625 expr
= strip_expr(expr
->unop
);
629 name
= expr_to_var_sym(expr
, &sym
);
634 FOR_EACH_SM(stree
, sm
) {
637 if (strcmp(name
, sm
->name
) == 0) {
639 snprintf(printed_name
, sizeof(printed_name
), "*$");
640 else /* these are already handled. fixme: handle them here */
642 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
643 snprintf(printed_name
, sizeof(printed_name
), "*$");
644 } else if (strncmp(name
, sm
->name
, len
) == 0) {
645 if (isalnum(sm
->name
[len
]))
648 snprintf(printed_name
, sizeof(printed_name
), "$->%s", sm
->name
+ len
+ 1);
650 snprintf(printed_name
, sizeof(printed_name
), "$%s", sm
->name
+ len
);
654 callback(call
, param
, printed_name
, sm
);
655 } END_FOR_EACH_SM(sm
);
660 static void match_call_info(struct expression
*call
)
662 struct member_info_callback
*cb
;
663 struct expression
*arg
;
668 name
= get_fnptr_name(call
->fn
);
672 FOR_EACH_PTR(member_callbacks
, cb
) {
673 stree
= get_all_states_stree(cb
->owner
);
675 FOR_EACH_PTR(call
->args
, arg
) {
676 print_struct_members(call
, arg
, i
, stree
, cb
->callback
);
678 } END_FOR_EACH_PTR(arg
);
680 } END_FOR_EACH_PTR(cb
);
685 static int get_param(int param
, char **name
, struct symbol
**sym
)
691 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
693 * this is a temporary hack to work around a bug (I think in sparse?)
694 * 2.6.37-rc1:fs/reiserfs/journal.o
695 * If there is a function definition without parameter name found
696 * after a function implementation then it causes a crash.
700 if (arg
->ident
->name
< (char *)100)
703 *name
= arg
->ident
->name
;
708 } END_FOR_EACH_PTR(arg
);
713 static int function_signature_matches(const char *sig
)
717 my_sig
= function_signature();
719 return 1; /* default to matching */
720 if (strcmp(my_sig
, sig
) == 0)
725 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
727 struct select_caller_info_data
*data
= _data
;
734 struct symbol
*sym
= NULL
;
735 struct def_callback
*def_callback
;
741 func_id
= atoi(argv
[0]);
743 type
= strtol(argv
[1], NULL
, 10);
744 param
= strtol(argv
[2], NULL
, 10);
750 if (data
->prev_func_id
== -1)
751 data
->prev_func_id
= func_id
;
752 if (type
== INTERNAL
&&
753 !function_signature_matches(value
))
755 if (func_id
!= data
->prev_func_id
) {
756 stree
= __pop_fake_cur_stree();
758 merge_stree(&data
->final_states
, stree
);
760 __push_fake_cur_stree();
762 data
->prev_func_id
= func_id
;
768 if (param
>= 0 && !get_param(param
, &name
, &sym
))
771 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
772 if (def_callback
->hook_type
== type
)
773 def_callback
->callback(name
, sym
, key
, value
);
774 } END_FOR_EACH_PTR(def_callback
);
779 static void get_direct_callers(struct select_caller_info_data
*data
, struct symbol
*sym
)
781 sql_select_caller_info(data
,
782 "call_id, type, parameter, key, value", sym
,
783 caller_info_callback
);
786 static struct string_list
*ptr_names_done
;
787 static struct string_list
*ptr_names
;
789 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
791 insert_string(&ptr_names
, alloc_string(argv
[0]));
795 static char *get_next_ptr_name(void)
799 FOR_EACH_PTR(ptr_names
, ptr
) {
800 if (list_has_string(ptr_names_done
, ptr
))
802 insert_string(&ptr_names_done
, ptr
);
804 } END_FOR_EACH_PTR(ptr
);
808 static void get_ptr_names(const char *file
, const char *name
)
810 char sql_filter
[1024];
814 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
817 snprintf(sql_filter
, 1024, "function = '%s';", name
);
820 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
822 run_sql(get_ptr_name
, NULL
,
823 "select distinct ptr from function_ptr where %s",
826 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
830 while ((name
= get_next_ptr_name()))
831 get_ptr_names(NULL
, name
);
834 static void match_data_from_db(struct symbol
*sym
)
836 struct select_caller_info_data data
= { .prev_func_id
= -1 };
840 if (!sym
|| !sym
->ident
)
843 __push_fake_cur_stree();
849 if (sym
->ctype
.modifiers
& MOD_STATIC
)
850 get_ptr_names(get_base_file(), sym
->ident
->name
);
852 get_ptr_names(NULL
, sym
->ident
->name
);
854 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
855 __free_ptr_list((struct ptr_list
**)&ptr_names
);
856 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
857 stree
= __pop_fake_cur_stree();
862 get_direct_callers(&data
, sym
);
864 FOR_EACH_PTR(ptr_names
, ptr
) {
865 run_sql(caller_info_callback
, &data
,
866 "select call_id, type, parameter, key, value"
867 " from caller_info where function = '%s' order by call_id",
870 } END_FOR_EACH_PTR(ptr
);
872 __free_ptr_list((struct ptr_list
**)&ptr_names
);
873 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
875 get_direct_callers(&data
, sym
);
878 stree
= __pop_fake_cur_stree();
879 merge_stree(&data
.final_states
, stree
);
882 FOR_EACH_SM(data
.final_states
, sm
) {
884 } END_FOR_EACH_SM(sm
);
886 free_stree(&data
.final_states
);
889 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
891 struct expression
*call_expr
= _call
;
892 struct call_implies_callback
*cb
;
893 struct expression
*arg
= NULL
;
900 type
= atoi(argv
[1]);
901 param
= atoi(argv
[2]);
903 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
904 if (cb
->type
!= type
)
907 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
911 cb
->callback(arg
, argv
[3], argv
[4]);
912 } END_FOR_EACH_PTR(cb
);
917 static void match_call_implies(struct expression
*expr
)
919 sql_select_call_implies("function, type, parameter, key, value", expr
,
920 call_implies_callbacks
);
923 static void print_initializer_list(struct expression_list
*expr_list
,
924 struct symbol
*struct_type
)
926 struct expression
*expr
;
927 struct symbol
*base_type
;
928 char struct_name
[256];
930 FOR_EACH_PTR(expr_list
, expr
) {
931 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
932 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
935 if (expr
->type
!= EXPR_IDENTIFIER
)
937 if (!expr
->expr_ident
)
939 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
941 base_type
= get_type(expr
->ident_expression
);
942 if (!base_type
|| base_type
->type
!= SYM_FN
)
944 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
945 struct_type
->ident
->name
, expr
->expr_ident
->name
);
946 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
948 } END_FOR_EACH_PTR(expr
);
951 static void global_variable(struct symbol
*sym
)
953 struct symbol
*struct_type
;
957 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
959 struct_type
= get_base_type(sym
);
962 if (struct_type
->type
== SYM_ARRAY
) {
963 struct_type
= get_base_type(struct_type
);
967 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
969 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
972 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
974 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
977 static void call_return_state_hooks_conditional(struct expression
*expr
)
979 struct returned_state_callback
*cb
;
980 struct range_list
*rl
;
982 int final_pass_orig
= final_pass
;
984 __push_fake_cur_stree();
987 __split_whole_condition(expr
->conditional
);
988 final_pass
= final_pass_orig
;
990 if (get_implied_rl(expr
->cond_true
, &rl
))
991 rl
= cast_rl(cur_func_return_type(), rl
);
993 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
994 return_ranges
= show_rl(rl
);
995 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
998 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
999 cb
->callback(return_id
, return_ranges
, expr
);
1000 } END_FOR_EACH_PTR(cb
);
1002 __push_true_states();
1003 __use_false_states();
1005 if (get_implied_rl(expr
->cond_false
, &rl
))
1006 rl
= cast_rl(cur_func_return_type(), rl
);
1008 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1009 return_ranges
= show_rl(rl
);
1010 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1013 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1014 cb
->callback(return_id
, return_ranges
, expr
);
1015 } END_FOR_EACH_PTR(cb
);
1017 __merge_true_states();
1018 __free_fake_cur_stree();
1021 static void call_return_state_hooks_compare(struct expression
*expr
)
1023 struct returned_state_callback
*cb
;
1024 char *return_ranges
;
1025 int final_pass_orig
= final_pass
;
1026 sval_t sval
= { .type
= &int_ctype
};
1029 if (!get_implied_value(expr
, &ret
))
1032 __push_fake_cur_stree();
1035 __split_whole_condition(expr
);
1036 final_pass
= final_pass_orig
;
1038 if (ret
.value
!= 0) {
1039 return_ranges
= alloc_sname("1");
1041 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1044 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1045 cb
->callback(return_id
, return_ranges
, expr
);
1046 } END_FOR_EACH_PTR(cb
);
1049 __push_true_states();
1050 __use_false_states();
1052 if (ret
.value
!= 1) {
1053 return_ranges
= alloc_sname("0");
1055 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1058 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1059 cb
->callback(return_id
, return_ranges
, expr
);
1060 } END_FOR_EACH_PTR(cb
);
1063 __merge_true_states();
1064 __free_fake_cur_stree();
1067 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1069 struct sm_state
*tmp
;
1071 FOR_EACH_PTR(slist
, tmp
) {
1072 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1074 } END_FOR_EACH_PTR(tmp
);
1079 static char *get_return_compare_str(struct expression
*expr
)
1087 compare_str
= expr_lte_to_param(expr
, -1);
1090 param
= get_param_num(expr
);
1094 var
= expr_to_var(expr
);
1097 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1098 comparison
= get_comparison_strings(var
, buf
);
1104 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1105 return alloc_sname(buf
);
1108 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1110 struct returned_state_callback
*cb
;
1111 struct range_list
*rl
;
1112 char *return_ranges
;
1113 struct sm_state
*tmp
;
1115 int nr_possible
, nr_states
;
1116 char *compare_str
= NULL
;
1118 struct state_list
*already_handled
= NULL
;
1120 if (!sm
|| !sm
->merged
)
1123 if (too_many_possible(sm
))
1126 /* bail if it gets too complicated */
1127 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1128 nr_states
= stree_count(__get_cur_stree());
1129 if (nr_states
* nr_possible
>= 2000)
1132 FOR_EACH_PTR(sm
->possible
, tmp
) {
1135 if (ptr_in_list(tmp
, already_handled
))
1137 add_ptr_list(&already_handled
, tmp
);
1140 __push_fake_cur_stree();
1142 overwrite_states_using_pool(sm
, tmp
);
1144 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1145 return_ranges
= show_rl(rl
);
1146 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1147 compare_str
= get_return_compare_str(expr
);
1149 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1150 return_ranges
= alloc_sname(buf
);
1154 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1155 cb
->callback(return_id
, return_ranges
, expr
);
1156 } END_FOR_EACH_PTR(cb
);
1158 __free_fake_cur_stree();
1159 } END_FOR_EACH_PTR(tmp
);
1161 free_slist(&already_handled
);
1166 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1168 struct sm_state
*sm
;
1170 if (!expr
|| expr_equal_to_param(expr
, -1))
1173 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1174 return split_possible_helper(sm
, expr
);
1177 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1179 struct range_list
*rl
;
1180 char *return_ranges
;
1189 return alloc_sname("");
1191 if (get_implied_value(expr
, &sval
)) {
1192 sval
= sval_cast(cur_func_return_type(), sval
);
1193 *rl_p
= alloc_rl(sval
, sval
);
1194 return sval_to_str(sval
);
1197 compare_str
= expr_equal_to_param(expr
, -1);
1198 math_str
= get_value_in_terms_of_parameter_math(expr
);
1200 if (get_implied_rl(expr
, &rl
)) {
1201 rl
= cast_rl(cur_func_return_type(), rl
);
1202 return_ranges
= show_rl(rl
);
1203 } else if (get_imaginary_absolute(expr
, &rl
)){
1204 rl
= cast_rl(cur_func_return_type(), rl
);
1205 return alloc_sname(show_rl(rl
));
1207 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1208 return_ranges
= show_rl(rl
);
1213 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1214 return alloc_sname(buf
);
1218 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1219 return alloc_sname(buf
);
1222 compare_str
= get_return_compare_str(expr
);
1224 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1225 return alloc_sname(buf
);
1227 return return_ranges
;
1230 static int split_positive_from_negative(struct expression
*expr
)
1232 struct returned_state_callback
*cb
;
1233 struct range_list
*rl
;
1234 const char *return_ranges
;
1235 struct range_list
*ret_rl
;
1238 /* We're going to print the states 3 times */
1239 if (stree_count(__get_cur_stree()) > 10000 / 3)
1242 if (!get_implied_rl(expr
, &rl
) || !rl
)
1244 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1246 /* Forget about INT_MAX and larger */
1247 if (rl_max(rl
).value
<= 0)
1249 if (!sval_is_negative(rl_min(rl
)))
1252 if (!assume(compare_expression(expr
, '>', zero_expr())))
1256 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1257 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1258 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1259 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1260 } END_FOR_EACH_PTR(cb
);
1264 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1265 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1268 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1269 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1270 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1271 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1272 } END_FOR_EACH_PTR(cb
);
1278 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1281 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1282 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1283 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1284 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1285 } END_FOR_EACH_PTR(cb
);
1293 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1295 struct returned_state_callback
*cb
;
1296 struct range_list
*rl
;
1297 struct range_list
*nonnull_rl
;
1299 struct range_list
*null_rl
= NULL
;
1300 char *return_ranges
;
1301 struct sm_state
*sm
;
1302 struct smatch_state
*state
;
1304 int final_pass_orig
= final_pass
;
1306 if (!expr
|| expr_equal_to_param(expr
, -1))
1308 if (expr
->type
== EXPR_CALL
)
1310 if (!is_pointer(expr
))
1313 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1316 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1319 if (!estate_rl(state
))
1321 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1323 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1326 nr_states
= stree_count(__get_cur_stree());
1327 if (option_info
&& nr_states
>= 1500)
1330 rl
= estate_rl(state
);
1332 __push_fake_cur_stree();
1335 __split_whole_condition(expr
);
1336 final_pass
= final_pass_orig
;
1338 nonnull_rl
= rl_filter(rl
, rl_zero());
1339 return_ranges
= show_rl(nonnull_rl
);
1340 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1343 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1344 cb
->callback(return_id
, return_ranges
, expr
);
1345 } END_FOR_EACH_PTR(cb
);
1347 __push_true_states();
1348 __use_false_states();
1350 return_ranges
= alloc_sname("0");
1351 null_sval
= sval_type_val(rl_type(rl
), 0);
1352 add_range(&null_rl
, null_sval
, null_sval
);
1353 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1355 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1356 cb
->callback(return_id
, return_ranges
, expr
);
1357 } END_FOR_EACH_PTR(cb
);
1359 __merge_true_states();
1360 __free_fake_cur_stree();
1365 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1367 struct range_list
*rl
;
1368 struct range_list
*nonzero_rl
;
1370 struct range_list
*zero_rl
= NULL
;
1372 struct returned_state_callback
*cb
;
1373 char *return_ranges
;
1374 int final_pass_orig
= final_pass
;
1377 if (option_project
!= PROJ_KERNEL
)
1380 nr_states
= stree_count(__get_cur_stree());
1381 if (nr_states
> 1500)
1384 if (get_value(expr
, &val
))
1386 if (!get_implied_rl(expr
, &rl
))
1388 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1390 if (rl_max(rl
).value
!= 0)
1393 __push_fake_cur_stree();
1396 __split_whole_condition(expr
);
1397 final_pass
= final_pass_orig
;
1399 nonzero_rl
= rl_filter(rl
, rl_zero());
1400 return_ranges
= show_rl(nonzero_rl
);
1401 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1404 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1405 cb
->callback(return_id
, return_ranges
, expr
);
1406 } END_FOR_EACH_PTR(cb
);
1408 __push_true_states();
1409 __use_false_states();
1411 return_ranges
= alloc_sname("0");
1412 zero_sval
= sval_type_val(rl_type(rl
), 0);
1413 add_range(&zero_rl
, zero_sval
, zero_sval
);
1414 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1416 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1417 cb
->callback(return_id
, return_ranges
, expr
);
1418 } END_FOR_EACH_PTR(cb
);
1420 __merge_true_states();
1421 __free_fake_cur_stree();
1426 static int is_boolean(struct expression
*expr
)
1428 struct range_list
*rl
;
1430 if (!get_implied_rl(expr
, &rl
))
1432 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1437 static int is_conditional(struct expression
*expr
)
1441 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1446 static int splitable_function_call(struct expression
*expr
)
1448 struct sm_state
*sm
;
1451 if (!expr
|| expr
->type
!= EXPR_CALL
)
1453 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1454 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1455 return split_possible_helper(sm
, expr
);
1458 static struct sm_state
*find_bool_param(void)
1460 struct stree
*start_states
;
1462 struct sm_state
*sm
, *tmp
;
1465 start_states
= get_start_states();
1467 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1470 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1473 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1474 rl_max(estate_rl(sm
->state
)).value
!= 1)
1477 } END_FOR_EACH_PTR_REVERSE(arg
);
1483 * Check if it's splitable. If not, then splitting it up is likely not
1484 * useful for the callers.
1486 FOR_EACH_PTR(sm
->possible
, tmp
) {
1489 if (!estate_get_single_value(tmp
->state
, &sval
))
1491 } END_FOR_EACH_PTR(tmp
);
1496 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1498 struct returned_state_callback
*cb
;
1499 struct range_list
*ret_rl
;
1500 const char *return_ranges
;
1501 struct sm_state
*tmp
;
1503 int nr_possible
, nr_states
;
1504 char *compare_str
= NULL
;
1506 struct state_list
*already_handled
= NULL
;
1508 if (!sm
|| !sm
->merged
)
1511 if (too_many_possible(sm
))
1514 /* bail if it gets too complicated */
1515 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1516 nr_states
= stree_count(__get_cur_stree());
1517 if (nr_states
* nr_possible
>= 2000)
1520 FOR_EACH_PTR(sm
->possible
, tmp
) {
1523 if (ptr_in_list(tmp
, already_handled
))
1525 add_ptr_list(&already_handled
, tmp
);
1528 __push_fake_cur_stree();
1530 overwrite_states_using_pool(sm
, tmp
);
1532 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1533 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1534 compare_str
= get_return_compare_str(expr
);
1536 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1537 return_ranges
= alloc_sname(buf
);
1541 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1542 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1543 } END_FOR_EACH_PTR(cb
);
1545 __free_fake_cur_stree();
1546 } END_FOR_EACH_PTR(tmp
);
1548 free_slist(&already_handled
);
1553 static int split_by_bool_param(struct expression
*expr
)
1555 struct sm_state
*start_sm
, *sm
;
1558 start_sm
= find_bool_param();
1561 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1562 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1564 return split_on_bool_sm(sm
, expr
);
1567 static int split_by_null_nonnull_param(struct expression
*expr
)
1570 struct sm_state
*sm
;
1572 /* function must only take one pointer */
1573 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1575 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1578 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1581 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1583 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1587 return split_on_bool_sm(sm
, expr
);
1590 static void call_return_state_hooks(struct expression
*expr
)
1592 struct returned_state_callback
*cb
;
1593 struct range_list
*ret_rl
;
1594 const char *return_ranges
;
1598 if (__path_is_null())
1601 expr
= strip_expr(expr
);
1603 if (is_impossible_path())
1606 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1607 !get_implied_value(expr
, &sval
)) &&
1608 (is_condition(expr
) || is_boolean(expr
))) {
1609 call_return_state_hooks_compare(expr
);
1611 } else if (is_conditional(expr
)) {
1612 call_return_state_hooks_conditional(expr
);
1614 } else if (call_return_state_hooks_split_possible(expr
)) {
1616 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1618 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1620 } else if (splitable_function_call(expr
)) {
1622 } else if (split_positive_from_negative(expr
)) {
1624 } else if (split_by_bool_param(expr
)) {
1625 } else if (split_by_null_nonnull_param(expr
)) {
1630 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1631 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1634 nr_states
= stree_count(__get_cur_stree());
1635 if (nr_states
>= 10000) {
1636 match_return_info(return_id
, (char *)return_ranges
, expr
);
1639 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1640 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1641 } END_FOR_EACH_PTR(cb
);
1644 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1646 struct returned_member_callback
*cb
;
1647 struct stree
*stree
;
1648 struct sm_state
*sm
;
1649 struct symbol
*type
;
1651 char member_name
[256];
1654 type
= get_type(expr
);
1655 if (!type
|| type
->type
!= SYM_PTR
)
1657 name
= expr_to_var(expr
);
1661 member_name
[sizeof(member_name
) - 1] = '\0';
1662 strcpy(member_name
, "$");
1665 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1666 stree
= __get_cur_stree();
1667 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1668 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1669 strcpy(member_name
, "*$");
1670 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1673 if (strncmp(sm
->name
, name
, len
) != 0)
1675 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1677 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1678 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1679 } END_FOR_EACH_SM(sm
);
1680 } END_FOR_EACH_PTR(cb
);
1685 static void reset_memdb(struct symbol
*sym
)
1687 mem_sql(NULL
, NULL
, "delete from caller_info;");
1688 mem_sql(NULL
, NULL
, "delete from return_states;");
1689 mem_sql(NULL
, NULL
, "delete from call_implies;");
1692 static void match_end_func_info(struct symbol
*sym
)
1694 if (__path_is_null())
1696 call_return_state_hooks(NULL
);
1699 static void match_after_func(struct symbol
*sym
)
1705 static void init_memdb(void)
1709 const char *schema_files
[] = {
1711 "db/caller_info.schema",
1712 "db/return_states.schema",
1713 "db/function_type_size.schema",
1714 "db/type_size.schema",
1715 "db/call_implies.schema",
1716 "db/function_ptr.schema",
1717 "db/local_values.schema",
1718 "db/function_type_value.schema",
1719 "db/type_value.schema",
1720 "db/function_type.schema",
1721 "db/data_info.schema",
1722 "db/parameter_name.schema",
1723 "db/constraints.schema",
1724 "db/constraints_required.schema",
1725 "db/fn_ptr_data_link.schema",
1726 "db/fn_data_link.schema",
1728 static char buf
[4096];
1733 rc
= sqlite3_open(":memory:", &mem_db
);
1734 if (rc
!= SQLITE_OK
) {
1735 printf("Error starting In-Memory database.");
1739 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1740 fd
= open_data_file(schema_files
[i
]);
1745 ret
= read(fd
, buf
, sizeof(buf
));
1746 if (ret
== sizeof(buf
)) {
1747 printf("Schema file too large: %s (limit %zd bytes)",
1748 schema_files
[i
], sizeof(buf
));
1751 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
1752 if (rc
!= SQLITE_OK
) {
1753 fprintf(stderr
, "SQL error #2: %s\n", err
);
1754 fprintf(stderr
, "%s\n", buf
);
1759 void open_smatch_db(void)
1768 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
1769 if (rc
!= SQLITE_OK
) {
1776 static void register_common_funcs(void)
1778 struct token
*token
;
1782 if (option_project
== PROJ_NONE
)
1783 strcpy(filename
, "common_functions");
1785 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
1787 token
= get_tokens_file(filename
);
1790 if (token_type(token
) != TOKEN_STREAMBEGIN
)
1792 token
= token
->next
;
1793 while (token_type(token
) != TOKEN_STREAMEND
) {
1794 if (token_type(token
) != TOKEN_IDENT
)
1796 func
= alloc_string(show_ident(token
->ident
));
1797 add_ptr_list(&common_funcs
, func
);
1798 token
= token
->next
;
1800 clear_token_alloc();
1803 static char *get_next_string(char **str
)
1805 static char string
[256];
1814 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
1819 memcpy(string
, start
, 255);
1821 printf("return_fix: '%s' too long", string
);
1825 memcpy(string
, start
, len
);
1833 static void register_return_replacements(void)
1835 char *func
, *orig
, *new;
1841 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
1842 fd
= open_data_file(filename
);
1845 ret
= read(fd
, buf
, sizeof(buf
));
1849 if (ret
== sizeof(buf
)) {
1850 printf("file too large: %s (limit %zd bytes)",
1851 filename
, sizeof(buf
));
1858 get_next_string(&p
);
1861 if (replace_count
== 0 || replace_count
% 3 != 0) {
1865 replace_table
= malloc(replace_count
* sizeof(char *));
1870 func
= alloc_string(get_next_string(&p
));
1871 orig
= alloc_string(get_next_string(&p
));
1872 new = alloc_string(get_next_string(&p
));
1874 replace_table
[i
++] = func
;
1875 replace_table
[i
++] = orig
;
1876 replace_table
[i
++] = new;
1880 void register_definition_db_callbacks(int id
)
1882 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
1883 add_hook(&global_variable
, BASE_HOOK
);
1884 add_hook(&global_variable
, DECLARATION_HOOK
);
1885 add_split_return_callback(match_return_info
);
1886 add_split_return_callback(print_returned_struct_members
);
1887 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
1888 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
1889 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
1891 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
1892 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
1894 register_common_funcs();
1895 register_return_replacements();
1898 void register_db_call_marker(int id
)
1900 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
1903 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
1905 struct expression
*arg
;
1907 char member_name
[256];
1912 const char *star
= "";
1914 if (expr
->type
!= EXPR_ASSIGNMENT
)
1916 name
= expr_to_var_sym(expr
->left
, sym
);
1919 if (key
[0] == '*') {
1923 if (strncmp(key
, "$", 1) != 0)
1925 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
1927 return alloc_string(member_name
);
1930 while (expr
->type
== EXPR_ASSIGNMENT
)
1931 expr
= strip_expr(expr
->right
);
1932 if (expr
->type
!= EXPR_CALL
)
1935 arg
= get_argument_from_call_expr(expr
->args
, param
);
1939 return get_variable_from_key(arg
, key
, sym
);
1942 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
1950 arg
= strip_expr(arg
);
1952 if (strcmp(key
, "$") == 0)
1953 return expr_to_var_sym(arg
, sym
);
1955 if (strcmp(key
, "*$") == 0) {
1956 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
1957 arg
= strip_expr(arg
->unop
);
1958 return expr_to_var_sym(arg
, sym
);
1960 tmp
= expr_to_var_sym(arg
, sym
);
1963 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
1965 return alloc_string(buf
);
1969 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
1970 arg
= strip_expr(arg
->unop
);
1971 tmp
= expr_to_var_sym(arg
, sym
);
1974 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
1975 return alloc_string(buf
);
1978 tmp
= expr_to_var_sym(arg
, sym
);
1981 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
1983 return alloc_string(buf
);
1986 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
1990 if (strcmp("$", key
) == 0)
1991 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
1992 return get_variable_from_key(arg
, key
, sym
);
1995 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
1998 static char buf
[256];
2000 name_len
= strlen(param_name
);
2002 if (strcmp(state_name
, param_name
) == 0) {
2004 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2005 strncmp(state_name
, param_name
, name_len
) == 0) {
2006 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2008 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2014 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2016 if (!sym
|| !sym
->ident
)
2019 return state_name_to_param_name(name
, sym
->ident
->name
);
2022 const char *get_param_name(struct sm_state
*sm
)
2024 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2027 char *get_data_info_name(struct expression
*expr
)
2034 expr
= strip_expr(expr
);
2035 name
= get_member_name(expr
);
2038 name
= expr_to_var_sym(expr
, &sym
);
2041 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2043 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2044 snprintf(buf
, sizeof(buf
), "static %s", name
);
2046 snprintf(buf
, sizeof(buf
), "global %s", name
);
2047 ret
= alloc_sname(buf
);