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
23 #include "smatch_slist.h"
24 #include "smatch_extra.h"
26 struct sqlite3
*smatch_db
;
27 struct sqlite3
*mem_db
;
28 struct sqlite3
*cache_db
;
37 static void call_return_state_hooks(struct expression
*expr
);
38 static void call_return_states_callbacks(const char *return_ranges
, struct expression
*expr
);
40 #define SQLITE_CACHE_PAGES 1000
44 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
46 ALLOCATOR(def_callback
, "definition db hook callbacks");
47 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
48 static struct callback_list
*select_caller_info_callbacks
;
50 struct def_name_sym_callback
{
52 void (*callback
)(const char *name
, struct symbol
*sym
, char *value
);
54 ALLOCATOR(def_name_sym_callback
, "definition db hook callbacks");
55 DECLARE_PTR_LIST(name_sym_callback_list
, struct def_name_sym_callback
);
56 static struct name_sym_callback_list
*select_caller_name_sym_callbacks
;
58 struct member_info_callback
{
60 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
62 ALLOCATOR(member_info_callback
, "caller_info callbacks");
63 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
64 static struct member_info_cb_list
*member_callbacks
;
65 static struct member_info_cb_list
*member_callbacks_new
;
67 struct return_info_callback
{
69 void (*callback
)(int return_id
, char *return_ranges
,
70 struct expression
*returned_expr
,
72 const char *printed_name
,
75 ALLOCATOR(return_info_callback
, "return_info callbacks");
76 DECLARE_PTR_LIST(return_info_cb_list
, struct return_info_callback
);
77 static struct return_info_cb_list
*return_callbacks
;
79 struct returned_state_callback
{
80 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
82 ALLOCATOR(returned_state_callback
, "returned state callbacks");
83 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
84 static struct returned_state_cb_list
*returned_state_callbacks
;
86 struct returned_member_callback
{
88 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
90 ALLOCATOR(returned_member_callback
, "returned member callbacks");
91 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
92 static struct returned_member_cb_list
*returned_member_callbacks
;
94 struct db_implies_callback
{
96 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
98 ALLOCATOR(db_implies_callback
, "return_implies callbacks");
99 DECLARE_PTR_LIST(db_implies_cb_list
, struct db_implies_callback
);
100 static struct db_implies_cb_list
*return_implies_cb_list_early
;
101 static struct db_implies_cb_list
*return_implies_cb_list_late
;
102 static struct db_implies_cb_list
*call_implies_cb_list
;
104 DECLARE_PTR_LIST(delete_list
, delete_hook
);
105 static struct delete_list
*delete_hooks
;
108 const char *func
, *rl
;
110 static struct split_data
**forced_splits
;
111 static int split_count
;
113 /* silently truncates if needed. */
114 char *escape_newlines(const char *str
)
120 for (i
= 0, j
= 0; str
[i
] != '\0' && j
!= sizeof(buf
); i
++, j
++) {
121 if (str
[i
] != '\r' && str
[i
] != '\n') {
128 if (j
== sizeof(buf
))
134 return alloc_sname(str
);
136 if (j
== sizeof(buf
))
138 return alloc_sname(buf
);
141 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
145 for (i
= 0; i
< argc
; i
++) {
148 sm_printf("%s", argv
[i
]);
154 void sql_exec(struct sqlite3
*db
, int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
162 if (option_debug
|| debug_db
) {
164 if (strncasecmp(sql
, "select", strlen("select")) == 0)
165 sqlite3_exec(db
, sql
, print_sql_output
, NULL
, NULL
);
168 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
169 if (rc
!= SQLITE_OK
&& !parse_error
) {
170 sm_ierror("%s:%d SQL error #2: %s\n", get_filename(), get_lineno(), err
);
171 sm_ierror("%s:%d SQL: '%s'\n", get_filename(), get_lineno(), sql
);
176 static int replace_count
;
177 static char **replace_table
;
178 static const char *replace_return_ranges(const char *return_ranges
)
182 if (!get_function()) {
183 /* I have no idea why EXPORT_SYMBOL() is here */
184 return return_ranges
;
186 for (i
= 0; i
< replace_count
; i
+= 3) {
187 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
188 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
189 return replace_table
[i
+ 2];
192 return return_ranges
;
195 static int delete_count
;
196 static char **delete_table
;
197 static bool is_delete_return(const char *return_ranges
)
204 for (i
= 0; i
< delete_count
; i
+= 2) {
205 if (strcmp(delete_table
[i
], get_function()) == 0 &&
206 strcmp(delete_table
[i
+ 1], return_ranges
) == 0)
213 void add_delete_return_hook(delete_hook
*hook
)
215 add_ptr_list(&delete_hooks
, hook
);
218 static bool is_project_delete_return(struct expression
*expr
)
222 FOR_EACH_PTR(delete_hooks
, hook
) {
225 } END_FOR_EACH_PTR(hook
);
229 static char *use_states
;
230 static int get_db_state_count(void)
235 FOR_EACH_SM(__get_cur_stree(), sm
) {
236 if (sm
->owner
== USHRT_MAX
)
238 if (use_states
[sm
->owner
])
240 } END_FOR_EACH_SM(sm
);
244 static bool in_base_file(struct symbol
*sym
)
246 return sym
->pos
.stream
== base_file_stream
;
249 static bool is_local(struct symbol
*sym
)
251 if (sym
->ctype
.modifiers
& MOD_STATIC
)
253 if ((sym
->ctype
.modifiers
& MOD_EXTERN
) &&
254 (sym
->ctype
.modifiers
& MOD_INLINE
) &&
258 if (!sym
->definition
)
261 if ((sym
->definition
->ctype
.modifiers
& MOD_EXTERN
) &&
262 (sym
->definition
->ctype
.modifiers
& MOD_INLINE
) &&
263 !in_base_file(sym
->definition
))
269 void db_ignore_states(int id
)
274 unsigned long long __fn_mtag
;
275 static void set_fn_mtag(struct symbol
*sym
)
279 if (is_local(cur_func_sym
))
280 snprintf(buf
, sizeof(buf
), "%s %s", get_base_file(), get_function());
282 snprintf(buf
, sizeof(buf
), "extern %s", get_function());
284 __fn_mtag
= str_to_mtag(buf
);
287 void sql_insert_return_states(int return_id
, const char *return_ranges
,
288 int type
, int param
, const char *key
, const char *value
)
290 unsigned long long id
;
293 if (key
&& strlen(key
) >= 80)
296 id
= (unsigned long)__inline_fn
;
300 sql_insert(return_states
, "0x%llx, '%s', %llu, %d, '%s', %d, %d, %d, '%s', '%s'",
301 get_base_file_id(), get_function(), id
, return_id
,
302 return_ranges
, is_local(cur_func_sym
), type
, param
, key
, value
);
305 static struct string_list
*common_funcs
;
306 static int is_common_function(const char *fn
)
313 if (strncmp(fn
, "__builtin_", 10) == 0)
316 FOR_EACH_PTR(common_funcs
, tmp
) {
317 if (strcmp(tmp
, fn
) == 0)
319 } END_FOR_EACH_PTR(tmp
);
324 static char *function_signature(void)
326 return type_to_str(get_real_base_type(cur_func_sym
));
329 void sql_insert_caller_info(struct expression
*call
, int type
,
330 int param
, const char *key
, const char *value
)
332 FILE *tmp_fd
= sm_outfd
;
335 if (!option_info
&& !__inline_call
)
340 if (key
&& strlen(key
) >= 80)
343 fn
= get_fnptr_name(call
->fn
);
349 "insert into caller_info values (0x%llx, '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
350 get_base_file_id(), get_function(), fn
, (unsigned long)call
,
351 is_static(call
->fn
), type
, param
, key
, value
);
357 if (strncmp(fn
, "__builtin_", 10) == 0)
359 if (type
!= INTERNAL
&& is_common_function(fn
))
362 sm_outfd
= caller_info_fd
;
363 sm_msg("SQL_caller_info: insert into caller_info values ("
364 "0x%llx, '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
365 get_base_file_id(), get_function(), fn
, is_static(call
->fn
),
366 type
, param
, key
, value
);
372 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
374 sql_insert_or_ignore(function_ptr
, "0x%llx, '%s', '%s', 0",
375 get_base_file_id(), fn
, struct_name
);
378 void sql_insert_return_implies(int type
, int param
, const char *key
, const char *value
)
380 unsigned long long id
;
383 id
= (unsigned long)__inline_fn
;
387 sql_insert_or_ignore(return_implies
, "0x%llx, '%s', %llu, %d, %d, %d, '%s', '%s'",
388 get_base_file_id(), get_function(), id
, fn_static(), type
,
392 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
394 sql_insert_or_ignore(call_implies
, "0x%llx, '%s', %lu, %d, %d, %d, '%s', '%s'",
395 get_base_file_id(), get_function(), (unsigned long)__inline_fn
,
396 fn_static(), type
, param
, key
, value
);
399 void sql_insert_function_type_size(const char *member
, const char *ranges
)
401 sql_insert(function_type_size
, "0x%llx, '%s', '%s', '%s'", get_base_file_id(), get_function(), member
, ranges
);
404 void sql_insert_function_type_info(int type
, const char *struct_type
, const char *member
, const char *value
)
406 sql_insert(function_type_info
, "0x%llx, '%s', %d, '%s', '%s', '%s'", get_base_file_id(), get_function(), type
, struct_type
, member
, value
);
409 void sql_insert_type_info(int type
, const char *member
, const char *value
)
411 sql_insert_cache(type_info
, "0x%llx, %d, '%s', '%s'", get_base_file_id(), type
, member
, value
);
414 void sql_insert_local_values(const char *name
, const char *value
)
416 sql_insert(local_values
, "0x%llx, '%s', '%s'", get_base_file_id(), name
, value
);
419 void sql_insert_function_type_value(const char *type
, const char *value
)
421 sql_insert(function_type_value
, "0x%llx, '%s', '%s', '%s'", get_base_file_id(), get_function(), type
, value
);
424 void sql_insert_function_type(int param
, const char *value
)
426 sql_insert(function_type
, "0x%llx, '%s', %d, %d, '%s'",
427 get_base_file_id(), get_function(), fn_static(), param
, value
);
430 void sql_insert_parameter_name(int param
, const char *value
)
432 sql_insert(parameter_name
, "0x%llx, '%s', %d, %d, '%s'",
433 get_base_file_id(), get_function(), fn_static(), param
, value
);
436 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
440 data_name
= get_data_info_name(data
);
443 sql_insert(data_info
, "0x%llx, '%s', %d, '%s'",
444 is_static(data
) ? get_base_file_id() : 0,
445 data_name
, type
, value
);
448 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
450 sql_insert(data_info
, "0x%llx, '%s', %d, '%s'",
451 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file_id() : 0,
455 void sql_save_constraint(const char *con
)
460 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", escape_newlines(con
));
463 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
465 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
468 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
473 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
474 "select constraints_required.data, constraints_required.op, '%s' from "
475 "constraints_required where bound = '%s';", new_limit
, old_limit
);
478 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
480 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
483 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
485 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
488 sql_insert(fn_data_link
, "0x%llx, '%s', %d, %d, %d, '%s', '%s'",
489 is_local(fn
->symbol
) ? get_base_file_id() : 0,
490 fn
->symbol
->ident
->name
,
491 is_local(fn
->symbol
),
492 type
, param
, key
, value
);
495 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
497 sql_insert_cache(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
498 tag
, get_filename(), get_function(), get_lineno(),
499 left_name
, right_name
);
502 void sql_insert_mtag_info(mtag_t tag
, int type
, const char *value
)
504 sql_insert_cache(mtag_info
, "'%s', %lld, %d, '%s'", get_filename(), tag
, type
, value
);
507 void sql_insert_mtag_map(mtag_t container
, int container_offset
, mtag_t tag
, int tag_offset
)
509 sql_insert(mtag_map
, "%lld, %d, %lld, %d", container
, container_offset
, tag
, tag_offset
);
512 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
514 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
517 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
519 mtag_t
*saved_tag
= _tag
;
522 new_tag
= strtoll(argv
[0], NULL
, 10);
525 *saved_tag
= new_tag
;
526 else if (*saved_tag
!= new_tag
)
532 int mtag_map_select_container(mtag_t tag
, int container_offset
, mtag_t
*container
)
536 run_sql(save_mtag
, &tmp
,
537 "select container from mtag_map where tag = %lld and container_offset = %d and tag_offset = 0;",
538 tag
, container_offset
);
540 if (tmp
== 0 || tmp
== -1ULL)
546 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
550 run_sql(save_mtag
, &tmp
,
551 "select tag from mtag_map where container = %lld and container_offset = %d;",
554 if (tmp
== 0 || tmp
== -1ULL)
560 char *get_static_filter(struct symbol
*sym
)
562 static char sql_filter
[1024];
564 /* This can only happen on buggy code. Return invalid SQL. */
566 sql_filter
[0] = '\0';
571 snprintf(sql_filter
, sizeof(sql_filter
),
572 "file = 0x%llx and function = '%s' and static = '1'",
573 get_base_file_id(), sym
->ident
->name
);
575 snprintf(sql_filter
, sizeof(sql_filter
),
576 "function = '%s' and static = '0'", sym
->ident
->name
);
582 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
584 int *row_count
= _row_count
;
589 *row_count
= atoi(argv
[0]);
593 static void sql_select_return_states_pointer(const char *cols
,
594 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
597 int return_count
= 0;
599 ptr
= get_fnptr_name(call
->fn
);
603 run_sql(get_row_count
, &return_count
,
604 "select count(*) from return_states join function_ptr "
605 "where return_states.function == function_ptr.function and "
606 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
607 /* The magic number 100 is just from testing on the kernel. */
608 if (return_count
== 0 || return_count
> 100) {
609 run_sql(callback
, info
,
610 "select distinct %s from return_states join function_ptr where "
611 "return_states.function == function_ptr.function and ptr = '%s' "
612 "and searchable = 1 and type = %d "
613 "order by function_ptr.file, return_states.file, return_id, type;",
614 cols
, ptr
, INTERNAL
);
615 mark_call_params_untracked(call
);
619 run_sql(callback
, info
,
620 "select %s from return_states join function_ptr where "
621 "return_states.function == function_ptr.function and ptr = '%s' "
622 "and searchable = 1 "
623 "order by function_ptr.file, return_states.file, return_id, type;",
627 static int is_local_symbol(struct expression
*expr
)
629 if (expr
->type
!= EXPR_SYMBOL
)
631 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
636 bool is_fn_ptr(struct expression
*fn
)
639 if (fn
->type
!= EXPR_SYMBOL
)
643 if (is_local_symbol(fn
))
648 void sql_select_return_states(const char *cols
, struct expression
*call
,
649 int (*callback
)(void*, int, char**, char**), void *info
)
651 struct expression
*fn
;
654 if (is_fake_call(call
))
657 fn
= strip_expr(call
->fn
);
659 sql_select_return_states_pointer(cols
, call
, callback
, info
);
664 mem_sql(callback
, info
,
665 "select %s from return_states where call_id = '%lu' order by return_id, type;",
666 cols
, (unsigned long)call
);
670 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
671 get_static_filter(fn
->symbol
));
672 if (row_count
== 0 && fn
->symbol
&& fn
->symbol
->definition
)
673 set_state(my_id
, "db_incomplete", NULL
, &incomplete
);
674 if (row_count
== 0 || row_count
> 3000) {
675 mark_call_params_untracked(call
);
679 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
680 cols
, get_static_filter(fn
->symbol
));
683 bool db_incomplete(void)
685 return !!get_state(my_id
, "db_incomplete", NULL
);
688 #define CALL_IMPLIES 0
689 #define RETURN_IMPLIES 1
691 struct implies_info
{
693 struct db_implies_cb_list
*cb_list
;
694 struct expression
*expr
;
698 void sql_select_implies(const char *cols
, struct implies_info
*info
,
699 int (*callback
)(void*, int, char**, char**))
701 if (info
->type
== RETURN_IMPLIES
&& inlinable(info
->expr
->fn
)) {
702 mem_sql(callback
, info
,
703 "select %s from return_implies where call_id = '%lu';",
704 cols
, (unsigned long)info
->expr
);
708 run_sql(callback
, info
, "select %s from %s_implies where %s;",
710 info
->type
== CALL_IMPLIES
? "call" : "return",
711 get_static_filter(info
->sym
));
714 struct select_caller_info_data
{
715 struct stree
*final_states
;
716 struct timeval start_time
;
722 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
724 static void sql_select_caller_info(struct select_caller_info_data
*data
,
725 const char *cols
, struct symbol
*sym
)
728 mem_sql(caller_info_callback
, data
,
729 "select %s from caller_info where call_id = %lu;",
730 cols
, (unsigned long)__inline_fn
);
734 if (is_common_function(sym
->ident
->name
))
736 run_sql(caller_info_callback
, data
,
737 "select %s from common_caller_info where %s order by call_id;",
738 cols
, get_static_filter(sym
));
742 run_sql(caller_info_callback
, data
,
743 "select %s from caller_info where %s order by call_id;",
744 cols
, get_static_filter(sym
));
747 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
749 struct def_callback
*def_callback
= __alloc_def_callback(0);
751 def_callback
->hook_type
= type
;
752 def_callback
->callback
= callback
;
753 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
756 void select_caller_name_sym(void (*fn
)(const char *name
, struct symbol
*sym
, char *value
), int type
)
758 struct def_name_sym_callback
*callback
= __alloc_def_name_sym_callback(0);
760 callback
->hook_type
= type
;
761 callback
->callback
= fn
;
762 add_ptr_list(&select_caller_name_sym_callbacks
, callback
);
766 * These call backs are used when the --info option is turned on to print struct
767 * member information. For example foo->bar could have a state in
768 * smatch_extra.c and also check_user.c.
770 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
772 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
774 member_callback
->owner
= owner
;
775 member_callback
->callback
= callback
;
776 add_ptr_list(&member_callbacks
, member_callback
);
779 void add_caller_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
781 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
783 member_callback
->owner
= owner
;
784 member_callback
->callback
= callback
;
785 add_ptr_list(&member_callbacks_new
, member_callback
);
788 void add_return_info_callback(int owner
,
789 void (*callback
)(int return_id
, char *return_ranges
,
790 struct expression
*returned_expr
,
792 const char *printed_name
,
793 struct sm_state
*sm
))
795 struct return_info_callback
*return_callback
= __alloc_return_info_callback(0);
797 return_callback
->owner
= owner
;
798 return_callback
->callback
= callback
;
799 add_ptr_list(&return_callbacks
, return_callback
);
802 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
804 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
806 callback
->callback
= fn
;
807 add_ptr_list(&returned_state_callbacks
, callback
);
810 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
))
812 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
814 member_callback
->owner
= owner
;
815 member_callback
->callback
= callback
;
816 add_ptr_list(&returned_member_callbacks
, member_callback
);
819 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
821 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
824 cb
->callback
= callback
;
825 add_ptr_list(&call_implies_cb_list
, cb
);
828 void select_return_implies_hook_early(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
830 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
833 cb
->callback
= callback
;
834 add_ptr_list(&return_implies_cb_list_early
, cb
);
837 void select_return_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
839 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
842 cb
->callback
= callback
;
843 add_ptr_list(&return_implies_cb_list_late
, cb
);
847 struct expression
*static_returns_call
;
848 struct symbol
*return_type
;
849 struct range_list
*return_range_list
;
852 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
854 struct return_info
*ret_info
= _ret_info
;
855 struct range_list
*rl
;
856 struct expression
*call_expr
= ret_info
->static_returns_call
;
860 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
861 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
865 static struct expression
*cached_expr
, *cached_no_args
;
866 static const char *cached_str
;
867 static struct range_list
*cached_rl
, *cached_str_rl
, *cached_no_args_rl
;
869 static void clear_cached_return_vals(void)
874 cached_str_rl
= NULL
;
875 cached_no_args
= NULL
;
876 cached_no_args_rl
= NULL
;
879 struct range_list
*db_return_vals(struct expression
*expr
)
881 struct return_info ret_info
= {};
887 if (is_fake_call(expr
))
890 if (expr
== cached_expr
)
891 return clone_rl(cached_rl
);
896 sm
= get_extra_sm_state(expr
);
898 cached_rl
= clone_rl(estate_rl(sm
->state
));
899 return clone_rl(estate_rl(sm
->state
));
901 ret_info
.static_returns_call
= expr
;
902 ret_info
.return_type
= get_type(expr
);
903 if (!ret_info
.return_type
)
906 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
909 ret_info
.return_range_list
= NULL
;
910 if (inlinable(expr
->fn
)) {
911 mem_sql(db_return_callback
, &ret_info
,
912 "select distinct return from return_states where call_id = '%lu';",
913 (unsigned long)expr
);
915 run_sql(db_return_callback
, &ret_info
,
916 "select distinct return from return_states where %s;",
917 get_static_filter(expr
->fn
->symbol
));
919 cached_rl
= clone_rl(ret_info
.return_range_list
);
920 return ret_info
.return_range_list
;
923 struct range_list
*db_return_vals_from_str(const char *fn_name
)
925 struct return_info ret_info
;
929 if (fn_name
== cached_str
)
930 return clone_rl(cached_str_rl
);
931 cached_str
= fn_name
;
932 cached_str_rl
= NULL
;
934 ret_info
.static_returns_call
= NULL
;
935 ret_info
.return_type
= &llong_ctype
;
936 ret_info
.return_range_list
= NULL
;
938 run_sql(db_return_callback
, &ret_info
,
939 "select distinct return from return_states where function = '%s';",
941 cached_str_rl
= clone_rl(ret_info
.return_range_list
);
942 return ret_info
.return_range_list
;
946 * This is used when we have a function that takes a function pointer as a
947 * parameter. "frob(blah, blah, my_function);" We know that the return values
948 * from frob() come from my_funcion() so we want to find the possible returns
949 * of my_function(), but we don't know which arguments are passed to it.
952 struct range_list
*db_return_vals_no_args(struct expression
*expr
)
954 struct return_info ret_info
= {};
956 if (!expr
|| expr
->type
!= EXPR_SYMBOL
)
959 if (expr
== cached_no_args
)
960 return clone_rl(cached_no_args_rl
);
961 cached_no_args
= expr
;
962 cached_no_args_rl
= NULL
;
964 ret_info
.static_returns_call
= expr
;
965 ret_info
.return_type
= get_type(expr
);
966 ret_info
.return_type
= get_real_base_type(ret_info
.return_type
);
967 if (!ret_info
.return_type
)
970 run_sql(db_return_callback
, &ret_info
,
971 "select distinct return from return_states where %s;",
972 get_static_filter(expr
->symbol
));
974 cached_no_args_rl
= clone_rl(ret_info
.return_range_list
);
975 return ret_info
.return_range_list
;
978 static void match_call_marker(struct expression
*expr
)
982 type
= get_type(expr
->fn
);
983 if (type
&& type
->type
== SYM_PTR
)
984 type
= get_real_base_type(type
);
987 * we just want to record something in the database so that if we have
988 * two calls like: frob(4); frob(some_unkown); then on the receiving
989 * side we know that sometimes frob is called with unknown parameters.
992 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
995 int is_recursive_member(const char *name
)
998 const char *p
, *next
;
1001 p
= strchr(name
, '>');
1006 next
= strchr(p
, '>');
1012 if (size
>= sizeof(buf
))
1014 memcpy(buf
, p
, size
);
1016 if (strstr(next
, buf
))
1022 char *sm_to_arg_name(struct expression
*expr
, struct sm_state
*sm
)
1025 const char *sm_name
;
1027 bool is_address
= false;
1028 bool add_star
= false;
1033 expr
= strip_expr(expr
);
1037 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
1038 expr
= strip_expr(expr
->unop
);
1042 name
= expr_to_var_sym(expr
, &sym
);
1050 if (sm_name
[0] == '*') {
1056 if (strncmp(name
, sm_name
, len
) != 0)
1058 if (sm_name
[len
] == '\0') {
1059 snprintf(buf
, sizeof(buf
), "%s%s$",
1060 add_star
? "*" : "", is_address
? "*" : "");
1062 if (sm_name
[len
] != '.' && sm_name
[len
] != '-')
1064 if (sm_name
[len
] == '-')
1066 // FIXME does is_address really imply that sm_name[len] == '-'
1067 snprintf(buf
, sizeof(buf
), "%s$->%s", add_star
? "*" : "",
1071 ret
= alloc_sname(buf
);
1077 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
,
1079 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
),
1082 struct sm_state
*sm
;
1083 const char *sm_name
;
1087 char printed_name
[256];
1090 struct symbol
*type
;
1092 expr
= strip_expr(expr
);
1095 type
= get_type(expr
);
1096 if (!new && type
&& type_bits(type
) < type_bits(&ulong_ctype
))
1099 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
1100 expr
= strip_expr(expr
->unop
);
1104 name
= expr_to_var_sym(expr
, &sym
);
1109 FOR_EACH_SM(__get_cur_stree(), sm
) {
1110 if (sm
->owner
!= owner
|| sm
->sym
!= sym
)
1115 if (sm_name
[0] == '*') {
1120 if (!add_star
&& strcmp(name
, sm_name
) == 0) {
1122 snprintf(printed_name
, sizeof(printed_name
), "*$");
1125 snprintf(printed_name
, sizeof(printed_name
), "$");
1129 } else if (add_star
&& strcmp(name
, sm_name
) == 0) {
1130 snprintf(printed_name
, sizeof(printed_name
), "%s*$",
1131 is_address
? "*" : "");
1132 } else if (strncmp(name
, sm_name
, len
) == 0) {
1133 if (sm_name
[len
] != '.' && sm_name
[len
] != '-')
1135 if (is_address
&& sm_name
[len
] == '.') {
1136 snprintf(printed_name
, sizeof(printed_name
),
1137 "%s$->%s", add_star
? "*" : "",
1139 } else if (is_address
&& sm_name
[len
] == '-') {
1140 snprintf(printed_name
, sizeof(printed_name
),
1141 "%s(*$)%s", add_star
? "*" : "",
1144 snprintf(printed_name
, sizeof(printed_name
),
1145 "%s$%s", add_star
? "*" : "",
1148 } else if (sm_name
[0] == '&' && strncmp(name
, sm_name
+ 1, len
) == 0) {
1149 if (sm_name
[len
+ 1] != '.' && sm_name
[len
+ 1] != '-')
1151 if (is_address
&& sm_name
[len
+ 1] == '.') {
1152 snprintf(printed_name
, sizeof(printed_name
),
1153 "&%s$->%s", add_star
? "*" : "",
1155 } else if (is_address
&& sm_name
[len
] == '-') {
1156 snprintf(printed_name
, sizeof(printed_name
),
1157 "&%s(*$)%s", add_star
? "*" : "",
1160 snprintf(printed_name
, sizeof(printed_name
),
1161 "&%s$%s", add_star
? "*" : "",
1167 if (is_recursive_member(printed_name
))
1169 callback(call
, param
, printed_name
, sm
);
1170 } END_FOR_EACH_SM(sm
);
1175 static void match_call_info(struct expression
*call
)
1177 struct member_info_callback
*cb
;
1178 struct expression
*arg
;
1181 FOR_EACH_PTR(member_callbacks
, cb
) {
1183 FOR_EACH_PTR(call
->args
, arg
) {
1185 print_struct_members(call
, arg
, i
, cb
->owner
, cb
->callback
, 0);
1186 } END_FOR_EACH_PTR(arg
);
1187 } END_FOR_EACH_PTR(cb
);
1190 static struct expression
*get_fake_variable(struct expression
*expr
)
1192 struct expression
*tmp
;
1194 tmp
= expr_get_fake_parent_expr(expr
);
1195 if (!tmp
|| tmp
->type
!= EXPR_ASSIGNMENT
)
1201 static struct sm_state
*get_returned_sm(struct expression
*expr
)
1203 struct expression
*fake
;
1205 fake
= get_fake_variable(expr
);
1209 return get_sm_state_expr(SMATCH_EXTRA
, expr
);
1212 static void match_call_info_new(struct expression
*call
)
1214 struct member_info_callback
*cb
;
1215 struct expression
*arg
, *tmp
;
1218 if (!option_info
&& !__inline_call
&& !local_debug
)
1221 FOR_EACH_PTR(member_callbacks_new
, cb
) {
1223 FOR_EACH_PTR(call
->args
, arg
) {
1225 tmp
= get_fake_variable(arg
);
1228 __ignore_param_used
++;
1229 print_struct_members(call
, tmp
, i
, cb
->owner
, cb
->callback
, 1);
1230 __ignore_param_used
--;
1231 } END_FOR_EACH_PTR(arg
);
1232 } END_FOR_EACH_PTR(cb
);
1235 static int get_param(int param
, char **name
, struct symbol
**sym
)
1241 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1243 *name
= arg
->ident
->name
;
1248 } END_FOR_EACH_PTR(arg
);
1253 static int function_signature_matches(const char *sig
)
1257 my_sig
= function_signature();
1258 if (!sig
|| !my_sig
)
1259 return 1; /* default to matching */
1260 if (strcmp(my_sig
, sig
) == 0)
1265 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
1267 struct select_caller_info_data
*data
= _data
;
1274 struct symbol
*sym
= NULL
;
1275 struct def_callback
*def_callback
;
1276 struct def_name_sym_callback
*ns_callback
;
1277 struct stree
*stree
;
1278 struct timeval cur_time
;
1287 gettimeofday(&cur_time
, NULL
);
1288 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
1291 func_id
= atoi(argv
[0]);
1293 type
= strtol(argv
[1], NULL
, 10);
1294 param
= strtol(argv
[2], NULL
, 10);
1300 if (data
->prev_func_id
== -1)
1301 data
->prev_func_id
= func_id
;
1302 if (func_id
!= data
->prev_func_id
) {
1303 stree
= __pop_fake_cur_stree();
1305 merge_stree(&data
->final_states
, stree
);
1307 __push_fake_cur_stree();
1309 data
->prev_func_id
= func_id
;
1315 if (type
== INTERNAL
&&
1316 !function_signature_matches(value
)) {
1321 if (param
>= 0 && !get_param(param
, &name
, &sym
))
1324 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
1325 if (def_callback
->hook_type
== type
)
1326 def_callback
->callback(name
, sym
, key
, value
);
1327 } END_FOR_EACH_PTR(def_callback
);
1329 p
= strchr(key
, '$');
1331 snprintf(fullname
, sizeof(fullname
), "%.*s%s%s", (int)(p
- key
), key
, name
, p
+ 1);
1333 snprintf(fullname
, sizeof(fullname
), "%s", key
);
1335 FOR_EACH_PTR(select_caller_name_sym_callbacks
, ns_callback
) {
1336 if (ns_callback
->hook_type
== type
)
1337 ns_callback
->callback(fullname
, sym
, value
);
1338 } END_FOR_EACH_PTR(ns_callback
);
1343 static struct string_list
*ptr_names_done
;
1344 static struct string_list
*ptr_names
;
1346 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
1348 insert_string(&ptr_names
, alloc_string(argv
[0]));
1352 static char *get_next_ptr_name(void)
1356 FOR_EACH_PTR(ptr_names
, ptr
) {
1357 if (!insert_string(&ptr_names_done
, ptr
))
1360 } END_FOR_EACH_PTR(ptr
);
1364 static void get_ptr_names(unsigned long long file
, const char *name
)
1366 char sql_filter
[1024];
1370 snprintf(sql_filter
, 1024, "file = 0x%llx and function = '%s';",
1373 snprintf(sql_filter
, 1024, "function = '%s';", name
);
1376 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
1378 run_sql(get_ptr_name
, NULL
,
1379 "select distinct ptr from function_ptr where %s",
1382 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1383 if (before
== after
)
1386 while ((name
= get_next_ptr_name()))
1387 get_ptr_names(0, name
);
1390 static void match_data_from_db(struct symbol
*sym
)
1392 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1393 struct sm_state
*sm
;
1394 struct stree
*stree
;
1395 struct timeval end_time
;
1397 if (!sym
|| !sym
->ident
)
1401 gettimeofday(&data
.start_time
, NULL
);
1403 __push_fake_cur_stree();
1409 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1410 get_ptr_names(get_base_file_id(), sym
->ident
->name
);
1412 get_ptr_names(0, sym
->ident
->name
);
1414 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1415 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1416 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1417 __free_fake_cur_stree();
1421 sql_select_caller_info(&data
,
1422 "call_id, type, parameter, key, value",
1426 stree
= __pop_fake_cur_stree();
1428 merge_stree(&data
.final_states
, stree
);
1430 __push_fake_cur_stree();
1432 data
.prev_func_id
= -1;
1436 FOR_EACH_PTR(ptr_names
, ptr
) {
1437 run_sql(caller_info_callback
, &data
,
1438 "select call_id, type, parameter, key, value"
1439 " from common_caller_info where function = '%s' order by call_id",
1441 } END_FOR_EACH_PTR(ptr
);
1444 FOR_EACH_PTR(ptr_names
, ptr
) {
1446 } END_FOR_EACH_PTR(ptr
);
1447 goto free_ptr_names
;
1450 FOR_EACH_PTR(ptr_names
, ptr
) {
1451 run_sql(caller_info_callback
, &data
,
1452 "select call_id, type, parameter, key, value"
1453 " from caller_info where function = '%s' order by call_id",
1456 } END_FOR_EACH_PTR(ptr
);
1459 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1460 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1462 sql_select_caller_info(&data
,
1463 "call_id, type, parameter, key, value",
1467 stree
= __pop_fake_cur_stree();
1469 merge_stree(&data
.final_states
, stree
);
1472 gettimeofday(&end_time
, NULL
);
1473 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1474 FOR_EACH_SM(data
.final_states
, sm
) {
1476 } END_FOR_EACH_SM(sm
);
1479 free_stree(&data
.final_states
);
1482 static int return_implies_callbacks(void *_info
, int argc
, char **argv
, char **azColName
)
1484 struct implies_info
*info
= _info
;
1485 struct db_implies_callback
*cb
;
1486 struct expression
*arg
= NULL
;
1493 type
= atoi(argv
[1]);
1494 param
= atoi(argv
[2]);
1496 /* The caller doesn't pass the assignment so -1 can't be useful */
1500 arg
= get_argument_from_call_expr(info
->expr
->args
, param
);
1505 FOR_EACH_PTR(info
->cb_list
, cb
) {
1506 if (cb
->type
!= type
)
1508 cb
->callback(info
->expr
, arg
, argv
[3], argv
[4]);
1509 } END_FOR_EACH_PTR(cb
);
1514 static int call_implies_callbacks(void *_info
, int argc
, char **argv
, char **azColName
)
1516 struct implies_info
*info
= _info
;
1517 struct db_implies_callback
*cb
;
1518 struct expression
*arg
;
1527 type
= atoi(argv
[1]);
1528 param
= atoi(argv
[2]);
1530 if (!get_param(param
, &name
, &sym
))
1532 arg
= symbol_expression(sym
);
1536 FOR_EACH_PTR(info
->cb_list
, cb
) {
1537 if (cb
->type
!= type
)
1539 cb
->callback(info
->expr
, arg
, argv
[3], argv
[4]);
1540 } END_FOR_EACH_PTR(cb
);
1545 static void match_return_implies_helper(struct expression
*expr
, struct db_implies_cb_list
*cb_list
)
1547 struct implies_info info
= {
1548 .type
= RETURN_IMPLIES
,
1552 if (expr
->fn
->type
!= EXPR_SYMBOL
||
1556 info
.sym
= expr
->fn
->symbol
;
1557 sql_select_implies("function, type, parameter, key, value", &info
,
1558 return_implies_callbacks
);
1561 static void match_return_implies_early(struct expression
*expr
)
1563 match_return_implies_helper(expr
, return_implies_cb_list_early
);
1566 static void match_return_implies_late(struct expression
*expr
)
1568 match_return_implies_helper(expr
, return_implies_cb_list_late
);
1571 static void match_call_implies(struct symbol
*sym
)
1573 struct implies_info info
= {
1574 .type
= CALL_IMPLIES
,
1575 .cb_list
= call_implies_cb_list
,
1578 if (!sym
|| !sym
->ident
)
1582 sql_select_implies("function, type, parameter, key, value", &info
,
1583 call_implies_callbacks
);
1586 static char *get_fn_param_str(struct expression
*expr
)
1588 struct expression
*tmp
;
1592 tmp
= get_assigned_expr(expr
);
1595 expr
= strip_expr(expr
);
1596 if (!expr
|| expr
->type
!= EXPR_CALL
)
1598 expr
= strip_expr(expr
->fn
);
1599 if (!expr
|| expr
->type
!= EXPR_SYMBOL
)
1601 param
= get_param_num(expr
);
1605 snprintf(buf
, sizeof(buf
), "[r $%d]", param
);
1606 return alloc_sname(buf
);
1609 static char *get_return_compare_is_param(struct expression
*expr
)
1616 param
= get_param_num(expr
);
1620 var
= expr_to_var(expr
);
1623 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1624 comparison
= get_comparison_strings(var
, buf
);
1630 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1631 return alloc_sname(buf
);
1634 static char *get_return_compare_str(struct expression
*expr
)
1638 compare_str
= get_return_compare_is_param(expr
);
1642 compare_str
= expr_lte_to_param(expr
, -1);
1646 return expr_param_comparison(expr
, -1);
1649 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1651 struct expression
*fake
;
1652 struct range_list
*rl
;
1653 const char *return_ranges
;
1655 const char *container_of_str
;
1656 const char *math_str
;
1664 return alloc_sname("");
1666 fake
= get_fake_variable(expr
);
1670 container_of_str
= get_container_of_str(expr
);
1672 if (get_implied_value(expr
, &sval
)) {
1673 sval
= sval_cast(cur_func_return_type(), sval
);
1674 *rl_p
= alloc_rl(sval
, sval
);
1675 return_ranges
= sval_to_str_or_err_ptr(sval
);
1676 if (container_of_str
) {
1677 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, container_of_str
);
1678 return alloc_sname(buf
);
1680 return return_ranges
;
1683 fn_param_str
= get_fn_param_str(expr
);
1684 math_str
= get_param_key_swap_dollar(expr
);
1685 compare_str
= expr_equal_to_param(expr
, -1);
1687 math_str
= get_value_in_terms_of_parameter_math(expr
);
1689 if (get_implied_rl(expr
, &rl
) && !is_whole_rl(rl
)) {
1690 rl
= cast_rl(cur_func_return_type(), rl
);
1691 return_ranges
= show_rl(rl
);
1692 } else if (get_imaginary_absolute(expr
, &rl
)){
1693 rl
= cast_rl(cur_func_return_type(), rl
);
1694 return alloc_sname(show_rl(rl
));
1696 get_absolute_rl(expr
, &rl
);
1697 rl
= cast_rl(cur_func_return_type(), rl
);
1698 return_ranges
= show_rl(rl
);
1702 if (container_of_str
) {
1703 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, container_of_str
);
1704 return alloc_sname(buf
);
1707 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, fn_param_str
);
1708 return alloc_sname(buf
);
1711 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1712 return alloc_sname(buf
);
1715 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1716 return alloc_sname(buf
);
1718 compare_str
= get_return_compare_str(expr
);
1720 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1721 return alloc_sname(buf
);
1724 return return_ranges
;
1727 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1729 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1732 static bool call_return_state_hooks_conditional(struct expression
*expr
)
1734 int final_pass_orig
= final_pass
;
1740 (expr
->type
!= EXPR_CONDITIONAL
&& expr
->type
!= EXPR_SELECT
))
1745 __push_fake_cur_stree();
1748 __split_whole_condition(expr
->conditional
);
1749 final_pass
= final_pass_orig
;
1751 call_return_state_hooks(expr
->cond_true
?: expr
->conditional
);
1753 __push_true_states();
1754 __use_false_states();
1756 call_return_state_hooks(expr
->cond_false
);
1758 __merge_true_states();
1759 __free_fake_cur_stree();
1765 static bool handle_forced_split(const char *return_ranges
, struct expression
*expr
)
1767 struct split_data
*data
= NULL
;
1768 struct expression
*compare
;
1769 struct range_list
*rl
;
1776 for (i
= 0; i
< split_count
; i
++) {
1777 if (get_function() &&
1778 strcmp(get_function(), forced_splits
[i
]->func
) == 0) {
1779 data
= forced_splits
[i
];
1786 // FIXME: this works for copy_to/from_user() because the only thing we
1787 // care about is zero/non-zero
1788 if (strcmp(data
->rl
, "0") != 0)
1791 compare
= compare_expression(expr
, SPECIAL_EQUAL
, zero_expr());
1794 if (get_implied_value(compare
, &sval
))
1797 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1798 call_return_states_callbacks("0", expr
);
1802 undo
= assume(compare_expression(expr
, SPECIAL_NOTEQUAL
, zero_expr()));
1803 if (get_implied_rl(expr
, &rl
)) {
1804 math
= strchr(return_ranges
, '[');
1805 snprintf(buf
, sizeof(buf
), "%s%s", show_rl(rl
), math
?: "");
1807 snprintf(buf
, sizeof(buf
), "%s", return_ranges
);
1809 call_return_states_callbacks(buf
, expr
);
1816 static void call_return_states_callbacks(const char *return_ranges
, struct expression
*expr
)
1818 struct returned_state_callback
*cb
;
1820 return_ranges
= replace_return_ranges(return_ranges
);
1821 if (is_delete_return(return_ranges
))
1823 if (is_project_delete_return(expr
))
1825 if (handle_forced_split(return_ranges
, expr
))
1829 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1830 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1831 } END_FOR_EACH_PTR(cb
);
1834 static void call_return_state_hooks_compare(struct expression
*expr
)
1836 char *return_ranges
;
1837 int final_pass_orig
= final_pass
;
1838 sval_t sval
= { .type
= &int_ctype
};
1841 if (!get_implied_value(expr
, &ret
))
1844 __push_fake_cur_stree();
1847 __split_whole_condition(expr
);
1848 final_pass
= final_pass_orig
;
1850 if (ret
.value
!= 0) {
1851 return_ranges
= alloc_sname("1");
1853 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1855 call_return_states_callbacks(return_ranges
, expr
);
1858 __push_true_states();
1859 __use_false_states();
1861 if (ret
.value
!= 1) {
1862 return_ranges
= alloc_sname("0");
1864 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1866 call_return_states_callbacks(return_ranges
, expr
);
1869 __merge_true_states();
1870 __free_fake_cur_stree();
1873 static bool is_implies_function(struct expression
*expr
)
1875 struct range_list
*rl
;
1880 rl
= get_range_implications(get_function());
1884 sm_msg("%s: is implied", __func__
);
1888 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1890 struct sm_state
*tmp
;
1892 FOR_EACH_PTR(slist
, tmp
) {
1893 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1895 } END_FOR_EACH_PTR(tmp
);
1900 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1902 struct range_list
*rl
;
1903 char *return_ranges
;
1904 struct sm_state
*tmp
;
1906 int nr_possible
, nr_states
;
1909 struct state_list
*already_handled
= NULL
;
1912 if (!sm
|| !sm
->merged
)
1915 if (too_many_possible(sm
) && !is_implies_function(expr
))
1918 /* bail if it gets too complicated */
1920 FOR_EACH_PTR(sm
->possible
, tmp
) {
1923 if (ptr_in_list(tmp
, already_handled
))
1925 add_ptr_list(&already_handled
, tmp
);
1927 } END_FOR_EACH_PTR(tmp
);
1928 free_slist(&already_handled
);
1929 nr_states
= get_db_state_count();
1930 if (nr_states
* nr_possible
>= 2000 && !is_implies_function(expr
))
1933 FOR_EACH_PTR(sm
->possible
, tmp
) {
1936 if (ptr_in_list(tmp
, already_handled
))
1938 add_ptr_list(&already_handled
, tmp
);
1941 __push_fake_cur_stree();
1943 overwrite_states_using_pool(sm
, tmp
);
1945 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1946 return_ranges
= show_rl(rl
);
1947 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1948 compare_str
= get_return_compare_str(expr
);
1949 /* ignore obvious stuff like 0 <= param */
1950 /* Is this worthile when we have PARAM_COMPARE? */
1952 strncmp(compare_str
, "[=", 2) != 0 &&
1953 rl_to_sval(rl
, &sval
))
1956 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1957 return_ranges
= alloc_sname(buf
);
1960 call_return_states_callbacks(return_ranges
, expr
);
1962 __free_fake_cur_stree();
1963 } END_FOR_EACH_PTR(tmp
);
1965 free_slist(&already_handled
);
1970 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1972 struct sm_state
*sm
;
1977 sm
= get_returned_sm(expr
);
1978 return split_possible_helper(sm
, expr
);
1981 static bool has_empty_state(struct sm_state
*sm
)
1983 struct sm_state
*tmp
;
1985 FOR_EACH_PTR(sm
->possible
, tmp
) {
1986 if (!estate_rl(tmp
->state
))
1988 } END_FOR_EACH_PTR(tmp
);
1993 static bool has_possible_negative(struct sm_state
*sm
)
1995 struct sm_state
*tmp
;
1997 if (!type_signed(estate_type(sm
->state
)))
2000 FOR_EACH_PTR(sm
->possible
, tmp
) {
2001 if (!estate_rl(tmp
->state
))
2003 if (sval_is_negative(estate_min(tmp
->state
)) &&
2004 sval_is_negative(estate_max(tmp
->state
)))
2006 } END_FOR_EACH_PTR(tmp
);
2011 static bool has_separate_zero_null(struct sm_state
*sm
)
2013 struct sm_state
*tmp
;
2016 FOR_EACH_PTR(sm
->possible
, tmp
) {
2017 if (!estate_get_single_value(tmp
->state
, &sval
))
2019 if (sval
.value
== 0)
2021 } END_FOR_EACH_PTR(tmp
);
2026 static int split_positive_from_negative(struct expression
*expr
)
2028 struct sm_state
*sm
;
2029 struct range_list
*rl
;
2030 const char *return_ranges
;
2031 struct range_list
*ret_rl
;
2035 /* We're going to print the states 3 times */
2036 if (get_db_state_count() > 10000 / 3)
2039 if (!get_implied_rl(expr
, &rl
) || !rl
)
2041 /* Forget about INT_MAX and larger */
2042 if (rl_max(rl
).value
<= 0)
2044 if (!sval_is_negative(rl_min(rl
)))
2047 sm
= get_returned_sm(expr
);
2050 if (has_empty_state(sm
))
2052 if (!has_possible_negative(sm
))
2054 separate_zero
= has_separate_zero_null(sm
);
2056 if (!assume(compare_expression(expr
, separate_zero
? '>' : SPECIAL_GTE
, zero_expr())))
2059 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2060 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2061 call_return_states_callbacks(return_ranges
, expr
);
2065 if (separate_zero
) {
2066 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
2068 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2069 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2070 call_return_states_callbacks(return_ranges
, expr
);
2076 undo
= assume(compare_expression(expr
, '<', zero_expr()));
2078 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2079 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2080 call_return_states_callbacks(return_ranges
, expr
);
2088 static int call_return_state_hooks_split_null_non_null_zero(struct expression
*expr
)
2090 struct range_list
*rl
;
2091 struct range_list
*nonnull_rl
;
2093 struct range_list
*null_rl
= NULL
;
2094 char *return_ranges
;
2095 struct sm_state
*sm
;
2096 struct smatch_state
*state
;
2098 int final_pass_orig
= final_pass
;
2100 if (!expr
|| expr_equal_to_param(expr
, -1))
2102 if (expr
->type
== EXPR_CALL
)
2105 sm
= get_returned_sm(expr
);
2108 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
2111 if (!estate_rl(state
))
2113 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
2115 if (has_possible_negative(sm
))
2117 if (!has_separate_zero_null(sm
))
2120 nr_states
= get_db_state_count();
2121 if (option_info
&& nr_states
>= 1500)
2124 rl
= estate_rl(state
);
2126 __push_fake_cur_stree();
2129 __split_whole_condition(expr
);
2130 final_pass
= final_pass_orig
;
2132 nonnull_rl
= rl_filter(rl
, rl_zero());
2133 return_ranges
= show_rl(nonnull_rl
);
2134 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
2136 call_return_states_callbacks(return_ranges
, expr
);
2138 __push_true_states();
2139 __use_false_states();
2141 return_ranges
= alloc_sname("0");
2142 null_sval
= sval_type_val(rl_type(rl
), 0);
2143 add_range(&null_rl
, null_sval
, null_sval
);
2144 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
2145 call_return_states_callbacks(return_ranges
, expr
);
2147 __merge_true_states();
2148 __free_fake_cur_stree();
2153 static bool is_neg_and_pos_err_code(struct range_list
*rl
)
2155 struct data_range
*tmp
, *last
;
2157 if (option_project
!= PROJ_KERNEL
)
2162 /* Assume s32min-(14),(-12)-(-1),1-s32max is an error code. */
2163 last
= last_ptr_list((struct ptr_list
*)rl
);
2164 if (last
->max
.value
>= 0 &&
2165 (last
->min
.value
!= 1 ||
2166 last
->max
.value
!= INT_MAX
))
2170 FOR_EACH_PTR(rl
, tmp
) {
2173 if (tmp
->min
.value
!= INT_MIN
&& tmp
->min
.value
< -4095)
2175 if (tmp
->max
.value
< -4095 || tmp
->max
.value
>= 0)
2177 } END_FOR_EACH_PTR(tmp
);
2182 static bool is_kernel_success_fail(struct sm_state
*sm
)
2184 struct sm_state
*tmp
;
2185 struct range_list
*rl
;
2186 bool has_zero
= false;
2187 bool has_neg
= false;
2192 if (!type_signed(estate_type(sm
->state
)))
2195 FOR_EACH_PTR(sm
->possible
, tmp
) {
2196 rl
= estate_rl(tmp
->state
);
2201 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 0) {
2206 if (is_neg_and_pos_err_code(estate_rl(tmp
->state
)))
2209 } END_FOR_EACH_PTR(tmp
);
2211 return has_zero
&& has_neg
;
2214 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
2216 struct expression
*tmp_ret
;
2217 struct sm_state
*sm
;
2218 struct range_list
*rl
;
2219 struct range_list
*nonzero_rl
;
2221 struct range_list
*zero_rl
= NULL
;
2223 char *return_ranges
;
2224 int final_pass_orig
= final_pass
;
2226 if (option_project
!= PROJ_KERNEL
)
2229 nr_states
= get_db_state_count();
2230 if (nr_states
> 2000)
2233 tmp_ret
= get_fake_variable(expr
);
2236 sm
= get_returned_sm(tmp_ret
);
2239 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
2241 if (!is_kernel_success_fail(sm
))
2244 rl
= estate_rl(sm
->state
);
2248 __push_fake_cur_stree();
2251 __split_whole_condition(tmp_ret
);
2252 final_pass
= final_pass_orig
;
2254 nonzero_rl
= rl_filter(rl
, rl_zero());
2255 nonzero_rl
= cast_rl(cur_func_return_type(), nonzero_rl
);
2256 return_ranges
= show_rl(nonzero_rl
);
2257 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
2259 call_return_states_callbacks(return_ranges
, expr
);
2261 __push_true_states();
2262 __use_false_states();
2264 return_ranges
= alloc_sname("0");
2265 zero_sval
= sval_type_val(rl_type(rl
), 0);
2266 add_range(&zero_rl
, zero_sval
, zero_sval
);
2267 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
2268 call_return_states_callbacks(return_ranges
, expr
);
2270 __merge_true_states();
2271 __free_fake_cur_stree();
2276 static int is_boolean(struct expression
*expr
)
2278 struct range_list
*rl
;
2280 if (!get_implied_rl(expr
, &rl
))
2282 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
2287 static int splitable_function_call(struct expression
*expr
)
2289 struct sm_state
*sm
;
2291 if (!expr
|| expr
->type
!= EXPR_CALL
)
2293 sm
= get_extra_sm_state(expr
);
2294 return split_possible_helper(sm
, expr
);
2297 static struct sm_state
*find_bool_param(void)
2299 struct stree
*start_states
;
2301 struct sm_state
*sm
, *tmp
;
2304 start_states
= get_start_states();
2306 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
2309 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
2312 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
2313 rl_max(estate_rl(sm
->state
)).value
!= 1)
2316 } END_FOR_EACH_PTR_REVERSE(arg
);
2322 * Check if it's splitable. If not, then splitting it up is likely not
2323 * useful for the callers.
2325 FOR_EACH_PTR(sm
->possible
, tmp
) {
2328 if (!estate_get_single_value(tmp
->state
, &sval
))
2330 } END_FOR_EACH_PTR(tmp
);
2335 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
2337 struct range_list
*ret_rl
;
2338 const char *return_ranges
;
2339 struct sm_state
*tmp
;
2341 struct state_list
*already_handled
= NULL
;
2343 if (!sm
|| !sm
->merged
)
2346 if (too_many_possible(sm
))
2349 FOR_EACH_PTR(sm
->possible
, tmp
) {
2352 if (ptr_in_list(tmp
, already_handled
))
2354 add_ptr_list(&already_handled
, tmp
);
2357 __push_fake_cur_stree();
2359 overwrite_states_using_pool(sm
, tmp
);
2361 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2362 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2363 call_return_states_callbacks(return_ranges
, expr
);
2365 __free_fake_cur_stree();
2366 } END_FOR_EACH_PTR(tmp
);
2368 free_slist(&already_handled
);
2373 static int split_by_bool_param(struct expression
*expr
)
2375 struct sm_state
*start_sm
, *sm
;
2378 start_sm
= find_bool_param();
2381 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
2382 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
2385 if (get_db_state_count() * 2 >= 2000)
2388 return split_on_bool_sm(sm
, expr
);
2391 static int split_by_null_nonnull_param(struct expression
*expr
)
2394 struct sm_state
*sm
;
2397 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
2398 if (!arg
|| !arg
->ident
)
2400 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
2403 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
2405 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
2409 if (!has_separate_zero_null(sm
))
2412 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
2413 if (get_db_state_count() * nr_possible
>= 2000)
2416 return split_on_bool_sm(sm
, expr
);
2419 static void call_hooks_based_on_pool(struct expression
*expr
, struct sm_state
*gate_sm
, struct sm_state
*pool_sm
)
2421 struct range_list
*ret_rl
;
2422 const char *return_ranges
;
2424 __push_fake_cur_stree();
2426 overwrite_states_using_pool(gate_sm
, pool_sm
);
2428 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2429 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2430 call_return_states_callbacks(return_ranges
, expr
);
2432 __free_fake_cur_stree();
2435 static bool split_by_impossible(struct expression
*expr
)
2437 static int impossible_id
;
2438 struct sm_state
*sm
, *tmp
;
2442 impossible_id
= id_from_name("register_impossible_return");
2447 * The only states for register_impossible_return are &impossible,
2448 * &undefined and &merged. This function will break otherwise.
2451 sm
= get_sm_state(impossible_id
, "impossible", NULL
);
2452 if (!sm
|| sm
->state
!= &merged
)
2455 nr_states
= get_db_state_count();
2456 if (nr_states
>= 1000)
2459 /* handle possible */
2460 FOR_EACH_PTR(sm
->possible
, tmp
) {
2463 if (tmp
->state
!= &undefined
)
2465 call_hooks_based_on_pool(expr
, sm
, tmp
);
2467 } END_FOR_EACH_PTR(tmp
);
2470 /* handle impossible */
2471 FOR_EACH_PTR(sm
->possible
, tmp
) {
2474 if (strcmp(tmp
->state
->name
, "impossible") != 0)
2476 call_hooks_based_on_pool(expr
, sm
, tmp
);
2478 } END_FOR_EACH_PTR(tmp
);
2483 struct expression
*strip_expr_statement(struct expression
*expr
)
2485 struct expression
*orig
= expr
;
2486 struct statement
*stmt
, *last_stmt
;
2490 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
2492 if (expr
->type
!= EXPR_STATEMENT
)
2494 stmt
= expr
->statement
;
2495 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
2498 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
2499 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
2500 last_stmt
= last_stmt
->label_statement
;
2501 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
2503 return strip_expr(last_stmt
->expression
);
2506 static bool is_kernel_error_path(struct expression
*expr
)
2508 struct range_list
*rl
;
2510 if (option_project
!= PROJ_KERNEL
)
2513 if (!get_implied_rl(expr
, &rl
))
2515 if (rl_type(rl
) != &int_ctype
)
2517 if (!is_neg_and_pos_err_code(rl
))
2522 static void call_return_state_hooks(struct expression
*expr
)
2524 struct range_list
*ret_rl
;
2525 const char *return_ranges
;
2530 struct range_list
*rl
= NULL
;
2532 get_absolute_rl(expr
, &rl
);
2533 sm_msg("RETURN: expr='%s' rl='%s' %lu states%s", expr_to_str(expr
),
2534 show_rl(rl
), stree_count(__get_cur_stree()),
2535 is_impossible_path() ? " (impossible path)" : "");
2538 if (__path_is_null())
2541 if (is_impossible_path())
2544 if (expr
&& (expr
->type
== EXPR_COMPARE
||
2545 !get_implied_value(expr
, &sval
)) &&
2546 (is_condition(expr
) || is_boolean(expr
))) {
2547 call_return_state_hooks_compare(expr
);
2549 sm_msg("%s: bool", __func__
);
2551 } else if (call_return_state_hooks_conditional(expr
)) {
2553 sm_msg("%s: condition", __func__
);
2555 } else if (is_kernel_error_path(expr
)) {
2557 sm_msg("%s: kernel error path", __func__
);
2559 } else if (call_return_state_hooks_split_success_fail(expr
)) {
2561 sm_msg("%s: success_fail", __func__
);
2563 } else if (call_return_state_hooks_split_possible(expr
)) {
2565 sm_msg("%s: split_possible", __func__
);
2567 } else if (split_positive_from_negative(expr
)) {
2569 sm_msg("%s: positive negative", __func__
);
2571 } else if (call_return_state_hooks_split_null_non_null_zero(expr
)) {
2573 sm_msg("%s: split zero non-zero", __func__
);
2575 } else if (splitable_function_call(expr
)) {
2577 sm_msg("%s: split_function_call", __func__
);
2579 } else if (split_by_bool_param(expr
)) {
2581 sm_msg("%s: bool param", __func__
);
2583 } else if (split_by_null_nonnull_param(expr
)) {
2585 sm_msg("%s: null non-null param", __func__
);
2587 } else if (split_by_impossible(expr
)) {
2589 sm_msg("%s: split by impossible", __func__
);
2594 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2595 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2597 nr_states
= get_db_state_count();
2598 if (nr_states
>= 10000) {
2600 match_return_info(return_id
, (char *)return_ranges
, expr
);
2601 print_limited_param_set(return_id
, (char *)return_ranges
, expr
);
2602 mark_all_params_untracked(return_id
, (char *)return_ranges
, expr
);
2605 call_return_states_callbacks(return_ranges
, expr
);
2607 sm_msg("%s: vanilla", __func__
);
2610 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
2612 struct returned_member_callback
*cb
;
2613 struct sm_state
*sm
;
2614 struct symbol
*type
;
2616 char member_name
[256];
2619 type
= get_type(expr
);
2620 if (!type
|| type
->type
!= SYM_PTR
)
2622 name
= expr_to_var(expr
);
2627 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
2628 FOR_EACH_MY_SM(cb
->owner
, __get_cur_stree(), sm
) {
2629 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
2630 strcpy(member_name
, "*$");
2631 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
2634 if (strncmp(sm
->name
, name
, len
) != 0)
2636 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
2638 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
2639 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
2640 } END_FOR_EACH_SM(sm
);
2641 } END_FOR_EACH_PTR(cb
);
2646 static void print_return_struct_info(int return_id
, char *return_ranges
,
2647 struct expression
*expr
,
2649 struct return_info_callback
*cb
)
2651 struct sm_state
*sm
;
2652 const char *printed_name
;
2655 FOR_EACH_MY_SM(cb
->owner
, __get_cur_stree(), sm
) {
2656 param
= get_param_key_from_var_sym(sm
->name
, sm
->sym
, expr
, &printed_name
);
2661 cb
->callback(return_id
, return_ranges
, expr
, param
, printed_name
, sm
);
2662 } END_FOR_EACH_SM(sm
);
2664 /* always print returned states after processing param states */
2665 FOR_EACH_MY_SM(cb
->owner
, __get_cur_stree(), sm
) {
2666 param
= get_return_param_key_from_var_sym(sm
->name
, sm
->sym
, expr
, &printed_name
);
2667 if (param
!= -1 || !printed_name
)
2669 cb
->callback(return_id
, return_ranges
, expr
, -1, printed_name
, sm
);
2670 } END_FOR_EACH_SM(sm
);
2673 static void print_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
2675 struct return_info_callback
*cb
;
2676 struct expression
*tmp
;
2679 if (!option_info
&& !__inline_fn
&&
2680 !local_debug
&& !option_debug
)
2683 tmp
= get_fake_variable(expr
);
2686 sym
= expr_to_sym(expr
);
2688 FOR_EACH_PTR(return_callbacks
, cb
) {
2689 __ignore_param_used
++;
2690 print_return_struct_info(return_id
, return_ranges
, expr
, sym
, cb
);
2691 __ignore_param_used
--;
2692 } END_FOR_EACH_PTR(cb
);
2695 static void reset_memdb(struct symbol
*sym
)
2697 mem_sql(NULL
, NULL
, "delete from caller_info;");
2698 mem_sql(NULL
, NULL
, "delete from return_states;");
2699 mem_sql(NULL
, NULL
, "delete from call_implies;");
2700 mem_sql(NULL
, NULL
, "delete from return_implies;");
2703 static void match_end_func_info(struct symbol
*sym
)
2705 if (__path_is_null())
2707 call_return_state_hooks(NULL
);
2710 static void match_after_func(struct symbol
*sym
)
2712 clear_cached_return_vals();
2717 static void init_memdb(void)
2721 const char *schema_files
[] = {
2723 "db/caller_info.schema",
2724 "db/common_caller_info.schema",
2725 "db/return_states.schema",
2726 "db/function_type_size.schema",
2727 "db/type_size.schema",
2728 "db/function_type_info.schema",
2729 "db/type_info.schema",
2730 "db/call_implies.schema",
2731 "db/return_implies.schema",
2732 "db/function_ptr.schema",
2733 "db/local_values.schema",
2734 "db/function_type_value.schema",
2735 "db/type_value.schema",
2736 "db/function_type.schema",
2737 "db/data_info.schema",
2738 "db/parameter_name.schema",
2739 "db/constraints.schema",
2740 "db/constraints_required.schema",
2741 "db/fn_ptr_data_link.schema",
2742 "db/fn_data_link.schema",
2743 "db/mtag_about.schema",
2744 "db/mtag_info.schema",
2745 "db/mtag_map.schema",
2746 "db/mtag_data.schema",
2747 "db/mtag_alias.schema",
2749 static char buf
[4096];
2754 rc
= sqlite3_open(":memory:", &mem_db
);
2755 if (rc
!= SQLITE_OK
) {
2756 sm_ierror("starting In-Memory database.");
2760 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2761 fd
= open_schema_file(schema_files
[i
]);
2764 ret
= read(fd
, buf
, sizeof(buf
));
2766 sm_ierror("failed to read: %s", schema_files
[i
]);
2770 if (ret
== sizeof(buf
)) {
2771 sm_ierror("Schema file too large: %s (limit %zd bytes)",
2772 schema_files
[i
], sizeof(buf
));
2776 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
2777 if (rc
!= SQLITE_OK
) {
2778 sm_ierror("SQL error #2: %s", err
);
2779 sm_ierror("%s", buf
);
2784 static void init_cachedb(void)
2788 const char *schema_files
[] = {
2789 "db/call_implies.schema",
2790 "db/return_implies.schema",
2791 "db/type_info.schema",
2792 "db/mtag_about.schema",
2793 "db/mtag_data.schema",
2794 "db/mtag_info.schema",
2795 "db/sink_info.schema",
2796 "db/hash_string.schema",
2798 static char buf
[4096];
2803 rc
= sqlite3_open(":memory:", &cache_db
);
2804 if (rc
!= SQLITE_OK
) {
2805 sm_ierror("starting In-Memory database.");
2809 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2810 fd
= open_schema_file(schema_files
[i
]);
2813 ret
= read(fd
, buf
, sizeof(buf
));
2815 sm_ierror("failed to read: %s", schema_files
[i
]);
2819 if (ret
== sizeof(buf
)) {
2820 sm_ierror("Schema file too large: %s (limit %zd bytes)",
2821 schema_files
[i
], sizeof(buf
));
2825 rc
= sqlite3_exec(cache_db
, buf
, NULL
, NULL
, &err
);
2826 if (rc
!= SQLITE_OK
) {
2827 sm_ierror("SQL error #2: %s", err
);
2828 sm_ierror("%s", buf
);
2833 static int save_cache_data(void *_table
, int argc
, char **argv
, char **azColName
)
2835 static char buf
[4096];
2838 char *table
= _table
;
2842 p
+= snprintf(p
, 4096 - (p
- buf
), "insert or ignore into %s values (", table
);
2843 for (i
= 0; i
< argc
; i
++) {
2845 p
+= snprintf(p
, 4096 - (p
- buf
), ", ");
2846 sqlite3_snprintf(sizeof(tmp
), tmp
, "%q", escape_newlines(argv
[i
]));
2847 p
+= snprintf(p
, 4096 - (p
- buf
), "'%s'", tmp
);
2850 p
+= snprintf(p
, 4096 - (p
- buf
), ");");
2854 sm_msg("SQL: %s", buf
);
2858 static void dump_cache(struct symbol_list
*sym_list
)
2860 const char *cache_tables
[] = {
2861 "type_info", "return_implies", "call_implies", "mtag_data",
2862 "mtag_info", "mtag_about", "sink_info", "hash_string",
2870 for (i
= 0; i
< ARRAY_SIZE(cache_tables
); i
++) {
2871 snprintf(buf
, sizeof(buf
), "select * from %s;", cache_tables
[i
]);
2872 cache_sql(&save_cache_data
, (char *)cache_tables
[i
], buf
);
2876 void open_smatch_db(char *db_file
)
2883 use_states
= malloc(num_checks
);
2884 memset(use_states
, 0xff, num_checks
);
2889 rc
= sqlite3_open_v2(db_file
, &smatch_db
, SQLITE_OPEN_READONLY
, NULL
);
2890 if (rc
!= SQLITE_OK
) {
2895 "PRAGMA cache_size = %d;", SQLITE_CACHE_PAGES
);
2899 static char *get_next_string(char **str
)
2901 static char string
[256];
2910 while (*p
!= '\0' && *p
!= '\n') {
2911 if (*p
== '\\' && *(p
+ 1) == ' ') {
2921 if (len
>= sizeof(string
)) {
2922 memcpy(string
, start
, sizeof(string
));
2923 string
[sizeof(string
) - 1] = '\0';
2924 sm_ierror("return_fix: '%s' too long", string
);
2928 memcpy(string
, start
, len
);
2930 for (i
= 0; i
< sizeof(string
) - 1; i
++) {
2931 if (string
[i
] == '\\' && string
[i
+ 1] == ' ') {
2932 for (j
= i
; string
[j
] != '\0'; j
++)
2933 string
[j
] = string
[j
+ 1];
2942 static void register_return_deletes(void)
2944 char *func
, *ret_str
;
2950 snprintf(filename
, 256, "db/%s.delete.return_states", option_project_str
);
2951 fd
= open_schema_file(filename
);
2954 ret
= read(fd
, buf
, sizeof(buf
));
2958 if (ret
== sizeof(buf
)) {
2959 sm_ierror("file too large: %s (limit %zd bytes)",
2960 filename
, sizeof(buf
));
2967 get_next_string(&p
);
2970 if (delete_count
== 0)
2972 if (delete_count
% 2 != 0) {
2973 printf("error parsing '%s' delete_count=%d\n", filename
, delete_count
);
2977 delete_table
= malloc(delete_count
* sizeof(char *));
2982 func
= alloc_string(get_next_string(&p
));
2983 ret_str
= alloc_string(get_next_string(&p
));
2985 delete_table
[i
++] = func
;
2986 delete_table
[i
++] = ret_str
;
2990 #define RETURN_FIX_SIZE 8196
2991 static void register_return_replacements(void)
2993 char *func
, *orig
, *new;
2999 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
3000 fd
= open_schema_file(filename
);
3003 buf
= malloc(RETURN_FIX_SIZE
);
3004 ret
= read(fd
, buf
, RETURN_FIX_SIZE
);
3010 if (ret
== RETURN_FIX_SIZE
) {
3011 sm_ierror("file too large: %s (limit %d bytes)",
3012 filename
, RETURN_FIX_SIZE
);
3020 get_next_string(&p
);
3023 if (replace_count
== 0) {
3027 if (replace_count
% 3 != 0) {
3028 printf("error parsing '%s' replace_count=%d\n", filename
, replace_count
);
3033 replace_table
= malloc(replace_count
* sizeof(char *));
3038 func
= alloc_string(get_next_string(&p
));
3039 orig
= alloc_string(get_next_string(&p
));
3040 new = alloc_string(get_next_string(&p
));
3042 replace_table
[i
++] = func
;
3043 replace_table
[i
++] = orig
;
3044 replace_table
[i
++] = new;
3049 static void register_forced_return_splits(void)
3051 int struct_members
= sizeof(struct split_data
) / sizeof(char *);
3057 snprintf(filename
, 256, "db/%s.forced_return_splits", option_project_str
);
3058 fd
= open_schema_file(filename
);
3061 ret
= read(fd
, buf
, sizeof(buf
));
3065 if (ret
== sizeof(buf
)) {
3066 sm_ierror("file too large: %s (limit %zd bytes)",
3067 filename
, sizeof(buf
));
3074 get_next_string(&p
);
3077 if (split_count
== 0)
3079 if (split_count
% struct_members
!= 0) {
3080 printf("error parsing '%s' split_count=%d\n", filename
, split_count
);
3084 split_count
/= struct_members
;
3085 forced_splits
= malloc(split_count
* sizeof(void *));
3090 struct split_data
*split
= malloc(sizeof(*split
));
3092 split
->func
= alloc_string(get_next_string(&p
));
3093 split
->rl
= alloc_string(get_next_string(&p
));
3094 forced_splits
[i
++] = split
;
3098 void register_definition_db_callbacks(int id
)
3102 add_hook(&match_call_info
, FUNCTION_CALL_HOOK_BEFORE
);
3103 add_hook(&match_call_info_new
, FUNCTION_CALL_HOOK_BEFORE
);
3104 add_split_return_callback(match_return_info
);
3105 add_split_return_callback(print_returned_struct_members
);
3106 add_split_return_callback(print_return_info
);
3107 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
3108 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
3109 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
3111 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
3112 add_hook(&match_call_implies
, FUNC_DEF_HOOK
);
3113 add_hook(&match_return_implies_early
, CALL_HOOK_AFTER_INLINE
);
3115 common_funcs
= load_strings_from_file(option_project_str
, "common_functions");
3116 register_return_deletes();
3117 register_return_replacements();
3118 register_forced_return_splits();
3120 add_hook(&dump_cache
, END_FILE_HOOK
);
3123 void register_definition_db_callbacks_late(int id
)
3125 add_hook(&match_return_implies_late
, CALL_HOOK_AFTER_INLINE
);
3128 void register_db_call_marker(int id
)
3130 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK_BEFORE
);
3133 char *get_data_info_name(struct expression
*expr
)
3140 expr
= strip_expr(expr
);
3141 name
= get_member_name(expr
);
3144 name
= expr_to_var_sym(expr
, &sym
);
3147 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
3149 if (sym
->ctype
.modifiers
& MOD_STATIC
)
3150 snprintf(buf
, sizeof(buf
), "static %s", name
);
3152 snprintf(buf
, sizeof(buf
), "global %s", name
);
3153 ret
= alloc_sname(buf
);