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
;
101 static struct db_implies_cb_list
*call_implies_cb_list
;
103 DECLARE_PTR_LIST(delete_list
, delete_hook
);
104 static struct delete_list
*delete_hooks
;
107 const char *func
, *rl
;
109 static struct split_data
**forced_splits
;
110 static int split_count
;
112 /* silently truncates if needed. */
113 char *escape_newlines(const char *str
)
119 for (i
= 0, j
= 0; str
[i
] != '\0' && j
!= sizeof(buf
); i
++, j
++) {
120 if (str
[i
] != '\r' && str
[i
] != '\n') {
127 if (j
== sizeof(buf
))
133 return alloc_sname(str
);
135 if (j
== sizeof(buf
))
137 return alloc_sname(buf
);
140 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
144 for (i
= 0; i
< argc
; i
++) {
147 sm_printf("%s", argv
[i
]);
153 void sql_exec(struct sqlite3
*db
, int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
161 if (option_debug
|| debug_db
) {
163 if (strncasecmp(sql
, "select", strlen("select")) == 0)
164 sqlite3_exec(db
, sql
, print_sql_output
, NULL
, NULL
);
167 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
168 if (rc
!= SQLITE_OK
&& !parse_error
) {
169 sm_ierror("%s:%d SQL error #2: %s\n", get_filename(), get_lineno(), err
);
170 sm_ierror("%s:%d SQL: '%s'\n", get_filename(), get_lineno(), sql
);
175 static int replace_count
;
176 static char **replace_table
;
177 static const char *replace_return_ranges(const char *return_ranges
)
181 if (!get_function()) {
182 /* I have no idea why EXPORT_SYMBOL() is here */
183 return return_ranges
;
185 for (i
= 0; i
< replace_count
; i
+= 3) {
186 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
187 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
188 return replace_table
[i
+ 2];
191 return return_ranges
;
194 static int delete_count
;
195 static char **delete_table
;
196 static bool is_delete_return(const char *return_ranges
)
203 for (i
= 0; i
< delete_count
; i
+= 2) {
204 if (strcmp(delete_table
[i
], get_function()) == 0 &&
205 strcmp(delete_table
[i
+ 1], return_ranges
) == 0)
212 void add_delete_return_hook(delete_hook
*hook
)
214 add_ptr_list(&delete_hooks
, hook
);
217 static bool is_project_delete_return(struct expression
*expr
)
221 FOR_EACH_PTR(delete_hooks
, hook
) {
224 } END_FOR_EACH_PTR(hook
);
228 static char *use_states
;
229 static int get_db_state_count(void)
234 FOR_EACH_SM(__get_cur_stree(), sm
) {
235 if (sm
->owner
== USHRT_MAX
)
237 if (use_states
[sm
->owner
])
239 } END_FOR_EACH_SM(sm
);
243 static bool in_base_file(struct symbol
*sym
)
245 return sym
->pos
.stream
== base_file_stream
;
248 static bool is_local(struct symbol
*sym
)
250 if (sym
->ctype
.modifiers
& MOD_STATIC
)
252 if ((sym
->ctype
.modifiers
& MOD_EXTERN
) &&
253 (sym
->ctype
.modifiers
& MOD_INLINE
) &&
257 if (!sym
->definition
)
260 if ((sym
->definition
->ctype
.modifiers
& MOD_EXTERN
) &&
261 (sym
->definition
->ctype
.modifiers
& MOD_INLINE
) &&
262 !in_base_file(sym
->definition
))
268 void db_ignore_states(int id
)
273 unsigned long long __fn_mtag
;
274 static void set_fn_mtag(struct symbol
*sym
)
278 if (is_local(cur_func_sym
))
279 snprintf(buf
, sizeof(buf
), "%s %s", get_base_file(), get_function());
281 snprintf(buf
, sizeof(buf
), "extern %s", get_function());
283 __fn_mtag
= str_to_mtag(buf
);
286 void sql_insert_return_states(int return_id
, const char *return_ranges
,
287 int type
, int param
, const char *key
, const char *value
)
289 unsigned long long id
;
292 if (key
&& strlen(key
) >= 80)
295 id
= (unsigned long)__inline_fn
;
299 sql_insert(return_states
, "'%s', '%s', %llu, %d, '%s', %d, %d, %d, '%s', '%s'",
300 get_base_file(), get_function(), id
, return_id
,
301 return_ranges
, is_local(cur_func_sym
), type
, param
, key
, value
);
304 static struct string_list
*common_funcs
;
305 static int is_common_function(const char *fn
)
312 if (strncmp(fn
, "__builtin_", 10) == 0)
315 FOR_EACH_PTR(common_funcs
, tmp
) {
316 if (strcmp(tmp
, fn
) == 0)
318 } END_FOR_EACH_PTR(tmp
);
323 static char *function_signature(void)
325 return type_to_str(get_real_base_type(cur_func_sym
));
328 void sql_insert_caller_info(struct expression
*call
, int type
,
329 int param
, const char *key
, const char *value
)
331 FILE *tmp_fd
= sm_outfd
;
334 if (!option_info
&& !__inline_call
)
339 if (key
&& strlen(key
) >= 80)
342 fn
= get_fnptr_name(call
->fn
);
348 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
349 get_base_file(), get_function(), fn
, (unsigned long)call
,
350 is_static(call
->fn
), type
, param
, key
, value
);
356 if (strncmp(fn
, "__builtin_", 10) == 0)
358 if (type
!= INTERNAL
&& is_common_function(fn
))
361 sm_outfd
= caller_info_fd
;
362 sm_msg("SQL_caller_info: insert into caller_info values ("
363 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
364 get_base_file(), get_function(), fn
, is_static(call
->fn
),
365 type
, param
, key
, value
);
371 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
373 sql_insert_or_ignore(function_ptr
, "'%s', '%s', '%s', 0",
374 get_base_file(), fn
, struct_name
);
377 void sql_insert_return_implies(int type
, int param
, const char *key
, const char *value
)
379 sql_insert_or_ignore(return_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'",
380 get_base_file(), get_function(), (unsigned long)__inline_fn
,
381 fn_static(), type
, param
, key
, value
);
384 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
386 sql_insert_or_ignore(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'",
387 get_base_file(), get_function(), (unsigned long)__inline_fn
,
388 fn_static(), type
, param
, key
, value
);
391 void sql_insert_function_type_size(const char *member
, const char *ranges
)
393 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
396 void sql_insert_function_type_info(int type
, const char *struct_type
, const char *member
, const char *value
)
398 sql_insert(function_type_info
, "'%s', '%s', %d, '%s', '%s', '%s'", get_base_file(), get_function(), type
, struct_type
, member
, value
);
401 void sql_insert_type_info(int type
, const char *member
, const char *value
)
403 sql_insert_cache(type_info
, "'%s', %d, '%s', '%s'", get_base_file(), type
, member
, value
);
406 void sql_insert_local_values(const char *name
, const char *value
)
408 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
411 void sql_insert_function_type_value(const char *type
, const char *value
)
413 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
416 void sql_insert_function_type(int param
, const char *value
)
418 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
419 get_base_file(), get_function(), fn_static(), param
, value
);
422 void sql_insert_parameter_name(int param
, const char *value
)
424 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
425 get_base_file(), get_function(), fn_static(), param
, value
);
428 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
432 data_name
= get_data_info_name(data
);
435 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
436 is_static(data
) ? get_base_file() : "extern",
437 data_name
, type
, value
);
440 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
442 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
443 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
447 void sql_save_constraint(const char *con
)
452 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", escape_newlines(con
));
455 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
457 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
460 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
465 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
466 "select constraints_required.data, constraints_required.op, '%s' from "
467 "constraints_required where bound = '%s';", new_limit
, old_limit
);
470 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
472 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
475 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
477 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
480 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
481 is_local(fn
->symbol
) ? get_base_file() : "extern",
482 fn
->symbol
->ident
->name
,
483 is_local(fn
->symbol
),
484 type
, param
, key
, value
);
487 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
489 sql_insert_cache(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
490 tag
, get_filename(), get_function(), get_lineno(),
491 left_name
, right_name
);
494 void sql_insert_mtag_info(mtag_t tag
, int type
, const char *value
)
496 sql_insert_cache(mtag_info
, "'%s', %lld, %d, '%s'", get_filename(), tag
, type
, value
);
499 void sql_insert_mtag_map(mtag_t container
, int container_offset
, mtag_t tag
, int tag_offset
)
501 sql_insert(mtag_map
, "%lld, %d, %lld, %d", container
, container_offset
, tag
, tag_offset
);
504 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
506 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
509 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
511 mtag_t
*saved_tag
= _tag
;
514 new_tag
= strtoll(argv
[0], NULL
, 10);
517 *saved_tag
= new_tag
;
518 else if (*saved_tag
!= new_tag
)
524 int mtag_map_select_container(mtag_t tag
, int container_offset
, mtag_t
*container
)
528 run_sql(save_mtag
, &tmp
,
529 "select container from mtag_map where tag = %lld and container_offset = %d and tag_offset = 0;",
530 tag
, container_offset
);
532 if (tmp
== 0 || tmp
== -1ULL)
538 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
542 run_sql(save_mtag
, &tmp
,
543 "select tag from mtag_map where container = %lld and container_offset = %d;",
546 if (tmp
== 0 || tmp
== -1ULL)
552 char *get_static_filter(struct symbol
*sym
)
554 static char sql_filter
[1024];
556 /* This can only happen on buggy code. Return invalid SQL. */
558 sql_filter
[0] = '\0';
563 snprintf(sql_filter
, sizeof(sql_filter
),
564 "file = '%s' and function = '%s' and static = '1'",
565 get_base_file(), sym
->ident
->name
);
567 snprintf(sql_filter
, sizeof(sql_filter
),
568 "function = '%s' and static = '0'", sym
->ident
->name
);
574 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
576 int *row_count
= _row_count
;
581 *row_count
= atoi(argv
[0]);
585 static void mark_call_params_untracked(struct expression
*call
)
587 struct expression
*arg
;
590 FOR_EACH_PTR(call
->args
, arg
) {
591 mark_untracked(call
, i
++, "$", NULL
);
592 } END_FOR_EACH_PTR(arg
);
595 static void sql_select_return_states_pointer(const char *cols
,
596 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
599 int return_count
= 0;
601 ptr
= get_fnptr_name(call
->fn
);
605 run_sql(get_row_count
, &return_count
,
606 "select count(*) from return_states join function_ptr "
607 "where return_states.function == function_ptr.function and "
608 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
609 /* The magic number 100 is just from testing on the kernel. */
610 if (return_count
> 100) {
611 mark_call_params_untracked(call
);
615 run_sql(callback
, info
,
616 "select %s from return_states join function_ptr where "
617 "return_states.function == function_ptr.function and ptr = '%s' "
618 "and searchable = 1 "
619 "order by function_ptr.file, return_states.file, return_id, type;",
623 static int is_local_symbol(struct expression
*expr
)
625 if (expr
->type
!= EXPR_SYMBOL
)
627 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
632 bool is_fn_ptr(struct expression
*fn
)
635 if (fn
->type
!= EXPR_SYMBOL
)
639 if (is_local_symbol(fn
))
644 void sql_select_return_states(const char *cols
, struct expression
*call
,
645 int (*callback
)(void*, int, char**, char**), void *info
)
647 struct expression
*fn
;
650 if (is_fake_call(call
))
653 fn
= strip_expr(call
->fn
);
655 sql_select_return_states_pointer(cols
, call
, callback
, info
);
660 mem_sql(callback
, info
,
661 "select %s from return_states where call_id = '%lu' order by return_id, type;",
662 cols
, (unsigned long)call
);
666 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
667 get_static_filter(fn
->symbol
));
668 if (row_count
== 0 && fn
->symbol
&& fn
->symbol
->definition
)
669 set_state(my_id
, "db_incomplete", NULL
, &incomplete
);
670 if (row_count
> 3000)
673 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
674 cols
, get_static_filter(fn
->symbol
));
677 bool db_incomplete(void)
679 return !!get_state(my_id
, "db_incomplete", NULL
);
682 #define CALL_IMPLIES 0
683 #define RETURN_IMPLIES 1
685 struct implies_info
{
687 struct db_implies_cb_list
*cb_list
;
688 struct expression
*expr
;
692 void sql_select_implies(const char *cols
, struct implies_info
*info
,
693 int (*callback
)(void*, int, char**, char**))
695 if (info
->type
== RETURN_IMPLIES
&& inlinable(info
->expr
->fn
)) {
696 mem_sql(callback
, info
,
697 "select %s from return_implies where call_id = '%lu';",
698 cols
, (unsigned long)info
->expr
);
702 run_sql(callback
, info
, "select %s from %s_implies where %s;",
704 info
->type
== CALL_IMPLIES
? "call" : "return",
705 get_static_filter(info
->sym
));
708 struct select_caller_info_data
{
709 struct stree
*final_states
;
710 struct timeval start_time
;
716 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
718 static void sql_select_caller_info(struct select_caller_info_data
*data
,
719 const char *cols
, struct symbol
*sym
)
722 mem_sql(caller_info_callback
, data
,
723 "select %s from caller_info where call_id = %lu;",
724 cols
, (unsigned long)__inline_fn
);
728 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
730 run_sql(caller_info_callback
, data
,
731 "select %s from common_caller_info where %s order by call_id;",
732 cols
, get_static_filter(sym
));
736 run_sql(caller_info_callback
, data
,
737 "select %s from caller_info where %s order by call_id;",
738 cols
, get_static_filter(sym
));
741 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
743 struct def_callback
*def_callback
= __alloc_def_callback(0);
745 def_callback
->hook_type
= type
;
746 def_callback
->callback
= callback
;
747 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
750 void select_caller_name_sym(void (*fn
)(const char *name
, struct symbol
*sym
, char *value
), int type
)
752 struct def_name_sym_callback
*callback
= __alloc_def_name_sym_callback(0);
754 callback
->hook_type
= type
;
755 callback
->callback
= fn
;
756 add_ptr_list(&select_caller_name_sym_callbacks
, callback
);
760 * These call backs are used when the --info option is turned on to print struct
761 * member information. For example foo->bar could have a state in
762 * smatch_extra.c and also check_user.c.
764 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
766 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
768 member_callback
->owner
= owner
;
769 member_callback
->callback
= callback
;
770 add_ptr_list(&member_callbacks
, member_callback
);
773 void add_caller_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
775 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
777 member_callback
->owner
= owner
;
778 member_callback
->callback
= callback
;
779 add_ptr_list(&member_callbacks_new
, member_callback
);
782 void add_return_info_callback(int owner
,
783 void (*callback
)(int return_id
, char *return_ranges
,
784 struct expression
*returned_expr
,
786 const char *printed_name
,
787 struct sm_state
*sm
))
789 struct return_info_callback
*return_callback
= __alloc_return_info_callback(0);
791 return_callback
->owner
= owner
;
792 return_callback
->callback
= callback
;
793 add_ptr_list(&return_callbacks
, return_callback
);
796 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
798 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
800 callback
->callback
= fn
;
801 add_ptr_list(&returned_state_callbacks
, callback
);
804 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
))
806 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
808 member_callback
->owner
= owner
;
809 member_callback
->callback
= callback
;
810 add_ptr_list(&returned_member_callbacks
, member_callback
);
813 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
815 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
818 cb
->callback
= callback
;
819 add_ptr_list(&call_implies_cb_list
, cb
);
822 void select_return_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
824 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
827 cb
->callback
= callback
;
828 add_ptr_list(&return_implies_cb_list
, cb
);
832 struct expression
*static_returns_call
;
833 struct symbol
*return_type
;
834 struct range_list
*return_range_list
;
837 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
839 struct return_info
*ret_info
= _ret_info
;
840 struct range_list
*rl
;
841 struct expression
*call_expr
= ret_info
->static_returns_call
;
845 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
846 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
850 struct range_list
*db_return_vals(struct expression
*expr
)
852 struct return_info ret_info
= {};
855 if (is_fake_call(expr
))
858 sm
= get_extra_sm_state(expr
);
860 return clone_rl(estate_rl(sm
->state
));
861 ret_info
.static_returns_call
= expr
;
862 ret_info
.return_type
= get_type(expr
);
863 if (!ret_info
.return_type
)
866 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
869 ret_info
.return_range_list
= NULL
;
870 if (inlinable(expr
->fn
)) {
871 mem_sql(db_return_callback
, &ret_info
,
872 "select distinct return from return_states where call_id = '%lu';",
873 (unsigned long)expr
);
875 run_sql(db_return_callback
, &ret_info
,
876 "select distinct return from return_states where %s;",
877 get_static_filter(expr
->fn
->symbol
));
879 return ret_info
.return_range_list
;
882 struct range_list
*db_return_vals_from_str(const char *fn_name
)
884 struct return_info ret_info
;
886 ret_info
.static_returns_call
= NULL
;
887 ret_info
.return_type
= &llong_ctype
;
888 ret_info
.return_range_list
= NULL
;
890 run_sql(db_return_callback
, &ret_info
,
891 "select distinct return from return_states where function = '%s';",
893 return ret_info
.return_range_list
;
897 * This is used when we have a function that takes a function pointer as a
898 * parameter. "frob(blah, blah, my_function);" We know that the return values
899 * from frob() come from my_funcion() so we want to find the possible returns
900 * of my_function(), but we don't know which arguments are passed to it.
903 struct range_list
*db_return_vals_no_args(struct expression
*expr
)
905 struct return_info ret_info
= {};
907 if (!expr
|| expr
->type
!= EXPR_SYMBOL
)
910 ret_info
.static_returns_call
= expr
;
911 ret_info
.return_type
= get_type(expr
);
912 ret_info
.return_type
= get_real_base_type(ret_info
.return_type
);
913 if (!ret_info
.return_type
)
916 run_sql(db_return_callback
, &ret_info
,
917 "select distinct return from return_states where %s;",
918 get_static_filter(expr
->symbol
));
920 return ret_info
.return_range_list
;
923 static void match_call_marker(struct expression
*expr
)
927 type
= get_type(expr
->fn
);
928 if (type
&& type
->type
== SYM_PTR
)
929 type
= get_real_base_type(type
);
932 * we just want to record something in the database so that if we have
933 * two calls like: frob(4); frob(some_unkown); then on the receiving
934 * side we know that sometimes frob is called with unknown parameters.
937 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
940 int is_recursive_member(const char *name
)
943 const char *p
, *next
;
946 p
= strchr(name
, '>');
951 next
= strchr(p
, '>');
957 if (size
>= sizeof(buf
))
959 memcpy(buf
, p
, size
);
961 if (strstr(next
, buf
))
967 char *sm_to_arg_name(struct expression
*expr
, struct sm_state
*sm
)
972 bool is_address
= false;
973 bool add_star
= false;
978 expr
= strip_expr(expr
);
982 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
983 expr
= strip_expr(expr
->unop
);
987 name
= expr_to_var_sym(expr
, &sym
);
995 if (sm_name
[0] == '*') {
1001 if (strncmp(name
, sm_name
, len
) != 0)
1003 if (sm_name
[len
] == '\0') {
1004 snprintf(buf
, sizeof(buf
), "%s%s$",
1005 add_star
? "*" : "", is_address
? "*" : "");
1007 if (sm_name
[len
] != '.' && sm_name
[len
] != '-')
1009 if (sm_name
[len
] == '-')
1011 // FIXME does is_address really imply that sm_name[len] == '-'
1012 snprintf(buf
, sizeof(buf
), "%s$->%s", add_star
? "*" : "",
1016 ret
= alloc_sname(buf
);
1022 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
,
1024 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
),
1027 struct sm_state
*sm
;
1028 const char *sm_name
;
1032 char printed_name
[256];
1035 struct symbol
*type
;
1037 expr
= strip_expr(expr
);
1040 type
= get_type(expr
);
1041 if (!new && type
&& type_bits(type
) < type_bits(&ulong_ctype
))
1044 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
1045 expr
= strip_expr(expr
->unop
);
1049 name
= expr_to_var_sym(expr
, &sym
);
1054 FOR_EACH_SM(__get_cur_stree(), sm
) {
1055 if (sm
->owner
!= owner
|| sm
->sym
!= sym
)
1059 if (sm_name
[0] == '*') {
1064 if (!add_star
&& strcmp(name
, sm_name
) == 0) {
1066 snprintf(printed_name
, sizeof(printed_name
), "*$");
1069 snprintf(printed_name
, sizeof(printed_name
), "$");
1073 } else if (add_star
&& strcmp(name
, sm_name
) == 0) {
1074 snprintf(printed_name
, sizeof(printed_name
), "%s*$",
1075 is_address
? "*" : "");
1076 } else if (strncmp(name
, sm_name
, len
) == 0) {
1077 if (sm_name
[len
] != '.' && sm_name
[len
] != '-')
1079 if (is_address
&& sm_name
[len
] == '.') {
1080 snprintf(printed_name
, sizeof(printed_name
),
1081 "%s$->%s", add_star
? "*" : "",
1083 } else if (is_address
&& sm_name
[len
] == '-') {
1084 snprintf(printed_name
, sizeof(printed_name
),
1085 "%s(*$)%s", add_star
? "*" : "",
1088 snprintf(printed_name
, sizeof(printed_name
),
1089 "%s$%s", add_star
? "*" : "",
1092 } else if (sm_name
[0] == '&' && strncmp(name
, sm_name
+ 1, len
) == 0) {
1093 if (sm_name
[len
+ 1] != '.' && sm_name
[len
+ 1] != '-')
1095 if (is_address
&& sm_name
[len
+ 1] == '.') {
1096 snprintf(printed_name
, sizeof(printed_name
),
1097 "&%s$->%s", add_star
? "*" : "",
1099 } else if (is_address
&& sm_name
[len
] == '-') {
1100 snprintf(printed_name
, sizeof(printed_name
),
1101 "&%s(*$)%s", add_star
? "*" : "",
1104 snprintf(printed_name
, sizeof(printed_name
),
1105 "&%s$%s", add_star
? "*" : "",
1111 if (is_recursive_member(printed_name
))
1113 callback(call
, param
, printed_name
, sm
);
1114 } END_FOR_EACH_SM(sm
);
1119 static void match_call_info(struct expression
*call
)
1121 struct member_info_callback
*cb
;
1122 struct expression
*arg
;
1125 FOR_EACH_PTR(member_callbacks
, cb
) {
1127 FOR_EACH_PTR(call
->args
, arg
) {
1129 print_struct_members(call
, arg
, i
, cb
->owner
, cb
->callback
, 0);
1130 } END_FOR_EACH_PTR(arg
);
1131 } END_FOR_EACH_PTR(cb
);
1134 static struct expression
*get_fake_variable(struct expression
*expr
)
1136 struct expression
*tmp
;
1138 tmp
= expr_get_fake_parent_expr(expr
);
1139 if (!tmp
|| tmp
->type
!= EXPR_ASSIGNMENT
)
1145 static void match_call_info_new(struct expression
*call
)
1147 struct member_info_callback
*cb
;
1148 struct expression
*arg
, *tmp
;
1151 if (!option_info
&& !__inline_call
&& !local_debug
)
1154 FOR_EACH_PTR(member_callbacks_new
, cb
) {
1156 FOR_EACH_PTR(call
->args
, arg
) {
1158 tmp
= get_fake_variable(arg
);
1161 __ignore_param_used
++;
1162 print_struct_members(call
, tmp
, i
, cb
->owner
, cb
->callback
, 1);
1163 __ignore_param_used
--;
1164 } END_FOR_EACH_PTR(arg
);
1165 } END_FOR_EACH_PTR(cb
);
1168 static int get_param(int param
, char **name
, struct symbol
**sym
)
1174 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1176 * this is a temporary hack to work around a bug (I think in sparse?)
1177 * 2.6.37-rc1:fs/reiserfs/journal.o
1178 * If there is a function definition without parameter name found
1179 * after a function implementation then it causes a crash.
1183 if (arg
->ident
->name
< (char *)100)
1186 *name
= arg
->ident
->name
;
1191 } END_FOR_EACH_PTR(arg
);
1196 static int function_signature_matches(const char *sig
)
1200 my_sig
= function_signature();
1201 if (!sig
|| !my_sig
)
1202 return 1; /* default to matching */
1203 if (strcmp(my_sig
, sig
) == 0)
1208 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
1210 struct select_caller_info_data
*data
= _data
;
1217 struct symbol
*sym
= NULL
;
1218 struct def_callback
*def_callback
;
1219 struct def_name_sym_callback
*ns_callback
;
1220 struct stree
*stree
;
1221 struct timeval cur_time
;
1230 gettimeofday(&cur_time
, NULL
);
1231 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
1234 func_id
= atoi(argv
[0]);
1236 type
= strtol(argv
[1], NULL
, 10);
1237 param
= strtol(argv
[2], NULL
, 10);
1243 if (data
->prev_func_id
== -1)
1244 data
->prev_func_id
= func_id
;
1245 if (func_id
!= data
->prev_func_id
) {
1246 stree
= __pop_fake_cur_stree();
1248 merge_stree(&data
->final_states
, stree
);
1250 __push_fake_cur_stree();
1252 data
->prev_func_id
= func_id
;
1258 if (type
== INTERNAL
&&
1259 !function_signature_matches(value
)) {
1264 if (param
>= 0 && !get_param(param
, &name
, &sym
))
1267 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
1268 if (def_callback
->hook_type
== type
)
1269 def_callback
->callback(name
, sym
, key
, value
);
1270 } END_FOR_EACH_PTR(def_callback
);
1272 p
= strchr(key
, '$');
1274 snprintf(fullname
, sizeof(fullname
), "%.*s%s%s", (int)(p
- key
), key
, name
, p
+ 1);
1276 snprintf(fullname
, sizeof(fullname
), "%s", key
);
1278 FOR_EACH_PTR(select_caller_name_sym_callbacks
, ns_callback
) {
1279 if (ns_callback
->hook_type
== type
)
1280 ns_callback
->callback(fullname
, sym
, value
);
1281 } END_FOR_EACH_PTR(ns_callback
);
1286 static struct string_list
*ptr_names_done
;
1287 static struct string_list
*ptr_names
;
1289 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
1291 insert_string(&ptr_names
, alloc_string(argv
[0]));
1295 static char *get_next_ptr_name(void)
1299 FOR_EACH_PTR(ptr_names
, ptr
) {
1300 if (!insert_string(&ptr_names_done
, ptr
))
1303 } END_FOR_EACH_PTR(ptr
);
1307 static void get_ptr_names(const char *file
, const char *name
)
1309 char sql_filter
[1024];
1313 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
1316 snprintf(sql_filter
, 1024, "function = '%s';", name
);
1319 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
1321 run_sql(get_ptr_name
, NULL
,
1322 "select distinct ptr from function_ptr where %s",
1325 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1326 if (before
== after
)
1329 while ((name
= get_next_ptr_name()))
1330 get_ptr_names(NULL
, name
);
1333 static void match_data_from_db(struct symbol
*sym
)
1335 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1336 struct sm_state
*sm
;
1337 struct stree
*stree
;
1338 struct timeval end_time
;
1340 if (!sym
|| !sym
->ident
)
1344 gettimeofday(&data
.start_time
, NULL
);
1346 __push_fake_cur_stree();
1352 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1353 get_ptr_names(get_base_file(), sym
->ident
->name
);
1355 get_ptr_names(NULL
, sym
->ident
->name
);
1357 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1358 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1359 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1360 __free_fake_cur_stree();
1364 sql_select_caller_info(&data
,
1365 "call_id, type, parameter, key, value",
1369 stree
= __pop_fake_cur_stree();
1371 merge_stree(&data
.final_states
, stree
);
1373 __push_fake_cur_stree();
1375 data
.prev_func_id
= -1;
1379 FOR_EACH_PTR(ptr_names
, ptr
) {
1380 run_sql(caller_info_callback
, &data
,
1381 "select call_id, type, parameter, key, value"
1382 " from common_caller_info where function = '%s' order by call_id",
1384 } END_FOR_EACH_PTR(ptr
);
1387 FOR_EACH_PTR(ptr_names
, ptr
) {
1389 } END_FOR_EACH_PTR(ptr
);
1390 goto free_ptr_names
;
1393 FOR_EACH_PTR(ptr_names
, ptr
) {
1394 run_sql(caller_info_callback
, &data
,
1395 "select call_id, type, parameter, key, value"
1396 " from caller_info where function = '%s' order by call_id",
1399 } END_FOR_EACH_PTR(ptr
);
1402 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1403 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1405 sql_select_caller_info(&data
,
1406 "call_id, type, parameter, key, value",
1410 stree
= __pop_fake_cur_stree();
1412 merge_stree(&data
.final_states
, stree
);
1415 gettimeofday(&end_time
, NULL
);
1416 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1417 FOR_EACH_SM(data
.final_states
, sm
) {
1419 } END_FOR_EACH_SM(sm
);
1422 free_stree(&data
.final_states
);
1425 static int return_implies_callbacks(void *_info
, int argc
, char **argv
, char **azColName
)
1427 struct implies_info
*info
= _info
;
1428 struct db_implies_callback
*cb
;
1429 struct expression
*arg
= NULL
;
1436 type
= atoi(argv
[1]);
1437 param
= atoi(argv
[2]);
1439 FOR_EACH_PTR(info
->cb_list
, cb
) {
1440 if (cb
->type
!= type
)
1443 arg
= get_argument_from_call_expr(info
->expr
->args
, param
);
1447 cb
->callback(info
->expr
, arg
, argv
[3], argv
[4]);
1448 } END_FOR_EACH_PTR(cb
);
1453 static int call_implies_callbacks(void *_info
, int argc
, char **argv
, char **azColName
)
1455 struct implies_info
*info
= _info
;
1456 struct db_implies_callback
*cb
;
1457 struct expression
*arg
;
1466 type
= atoi(argv
[1]);
1467 param
= atoi(argv
[2]);
1469 if (!get_param(param
, &name
, &sym
))
1471 arg
= symbol_expression(sym
);
1475 FOR_EACH_PTR(info
->cb_list
, cb
) {
1476 if (cb
->type
!= type
)
1478 cb
->callback(info
->expr
, arg
, argv
[3], argv
[4]);
1479 } END_FOR_EACH_PTR(cb
);
1484 static void match_return_implies(struct expression
*expr
)
1486 struct implies_info info
= {
1487 .type
= RETURN_IMPLIES
,
1488 .cb_list
= return_implies_cb_list
,
1491 if (expr
->fn
->type
!= EXPR_SYMBOL
||
1495 info
.sym
= expr
->fn
->symbol
;
1496 sql_select_implies("function, type, parameter, key, value", &info
,
1497 return_implies_callbacks
);
1500 static void match_call_implies(struct symbol
*sym
)
1502 struct implies_info info
= {
1503 .type
= CALL_IMPLIES
,
1504 .cb_list
= call_implies_cb_list
,
1507 if (!sym
|| !sym
->ident
)
1511 sql_select_implies("function, type, parameter, key, value", &info
,
1512 call_implies_callbacks
);
1515 static char *get_fn_param_str(struct expression
*expr
)
1517 struct expression
*tmp
;
1521 tmp
= get_assigned_expr(expr
);
1524 expr
= strip_expr(expr
);
1525 if (!expr
|| expr
->type
!= EXPR_CALL
)
1527 expr
= strip_expr(expr
->fn
);
1528 if (!expr
|| expr
->type
!= EXPR_SYMBOL
)
1530 param
= get_param_num(expr
);
1534 snprintf(buf
, sizeof(buf
), "[r $%d]", param
);
1535 return alloc_sname(buf
);
1538 static char *get_return_compare_is_param(struct expression
*expr
)
1545 param
= get_param_num(expr
);
1549 var
= expr_to_var(expr
);
1552 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1553 comparison
= get_comparison_strings(var
, buf
);
1559 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1560 return alloc_sname(buf
);
1563 static char *get_return_compare_str(struct expression
*expr
)
1567 compare_str
= get_return_compare_is_param(expr
);
1571 compare_str
= expr_lte_to_param(expr
, -1);
1575 return expr_param_comparison(expr
, -1);
1578 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1580 struct range_list
*rl
;
1581 char *return_ranges
;
1591 return alloc_sname("");
1593 if (get_implied_value(expr
, &sval
)) {
1594 sval
= sval_cast(cur_func_return_type(), sval
);
1595 *rl_p
= alloc_rl(sval
, sval
);
1596 return sval_to_str_or_err_ptr(sval
);
1599 fn_param_str
= get_fn_param_str(expr
);
1600 compare_str
= expr_equal_to_param(expr
, -1);
1601 math_str
= get_value_in_terms_of_parameter_math(expr
);
1603 if (get_implied_rl(expr
, &rl
) && !is_whole_rl(rl
)) {
1604 rl
= cast_rl(cur_func_return_type(), rl
);
1605 return_ranges
= show_rl(rl
);
1606 } else if (get_imaginary_absolute(expr
, &rl
)){
1607 rl
= cast_rl(cur_func_return_type(), rl
);
1608 return alloc_sname(show_rl(rl
));
1610 get_absolute_rl(expr
, &rl
);
1611 rl
= cast_rl(cur_func_return_type(), rl
);
1612 return_ranges
= show_rl(rl
);
1617 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, fn_param_str
);
1618 return alloc_sname(buf
);
1621 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1622 return alloc_sname(buf
);
1625 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1626 return alloc_sname(buf
);
1628 compare_str
= get_return_compare_str(expr
);
1630 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1631 return alloc_sname(buf
);
1634 return return_ranges
;
1637 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1639 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1642 static bool call_return_state_hooks_conditional(struct expression
*expr
)
1644 int final_pass_orig
= final_pass
;
1650 (expr
->type
!= EXPR_CONDITIONAL
&& expr
->type
!= EXPR_SELECT
))
1655 __push_fake_cur_stree();
1658 __split_whole_condition(expr
->conditional
);
1659 final_pass
= final_pass_orig
;
1661 call_return_state_hooks(expr
->cond_true
?: expr
->conditional
);
1663 __push_true_states();
1664 __use_false_states();
1666 call_return_state_hooks(expr
->cond_false
);
1668 __merge_true_states();
1669 __free_fake_cur_stree();
1675 static bool handle_forced_split(const char *return_ranges
, struct expression
*expr
)
1677 struct split_data
*data
= NULL
;
1678 struct expression
*compare
;
1679 struct range_list
*rl
;
1686 for (i
= 0; i
< split_count
; i
++) {
1687 if (strcmp(get_function(), forced_splits
[i
]->func
) == 0) {
1688 data
= forced_splits
[i
];
1695 // FIXME: this works for copy_to/from_user() because the only thing we
1696 // care about is zero/non-zero
1697 if (strcmp(data
->rl
, "0") != 0)
1700 compare
= compare_expression(expr
, SPECIAL_EQUAL
, zero_expr());
1703 if (get_implied_value(compare
, &sval
))
1706 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1707 call_return_states_callbacks("0", expr
);
1711 undo
= assume(compare_expression(expr
, SPECIAL_NOTEQUAL
, zero_expr()));
1712 if (get_implied_rl(expr
, &rl
)) {
1713 math
= strchr(return_ranges
, '[');
1714 snprintf(buf
, sizeof(buf
), "%s%s", show_rl(rl
), math
?: "");
1716 snprintf(buf
, sizeof(buf
), "%s", return_ranges
);
1718 call_return_states_callbacks(buf
, expr
);
1725 static void call_return_states_callbacks(const char *return_ranges
, struct expression
*expr
)
1727 struct returned_state_callback
*cb
;
1729 return_ranges
= replace_return_ranges(return_ranges
);
1730 if (is_delete_return(return_ranges
))
1732 if (is_project_delete_return(expr
))
1734 if (handle_forced_split(return_ranges
, expr
))
1738 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1739 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1740 } END_FOR_EACH_PTR(cb
);
1743 static void call_return_state_hooks_compare(struct expression
*expr
)
1745 char *return_ranges
;
1746 int final_pass_orig
= final_pass
;
1747 sval_t sval
= { .type
= &int_ctype
};
1750 if (!get_implied_value(expr
, &ret
))
1753 __push_fake_cur_stree();
1756 __split_whole_condition(expr
);
1757 final_pass
= final_pass_orig
;
1759 if (ret
.value
!= 0) {
1760 return_ranges
= alloc_sname("1");
1762 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1764 call_return_states_callbacks(return_ranges
, expr
);
1767 __push_true_states();
1768 __use_false_states();
1770 if (ret
.value
!= 1) {
1771 return_ranges
= alloc_sname("0");
1773 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1775 call_return_states_callbacks(return_ranges
, expr
);
1778 __merge_true_states();
1779 __free_fake_cur_stree();
1782 static bool is_implies_function(struct expression
*expr
)
1784 struct range_list
*rl
;
1789 rl
= get_range_implications(get_function());
1793 sm_msg("%s: is implied", __func__
);
1797 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1799 struct sm_state
*tmp
;
1801 FOR_EACH_PTR(slist
, tmp
) {
1802 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1804 } END_FOR_EACH_PTR(tmp
);
1809 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1811 struct range_list
*rl
;
1812 char *return_ranges
;
1813 struct sm_state
*tmp
;
1815 int nr_possible
, nr_states
;
1818 struct state_list
*already_handled
= NULL
;
1821 if (!sm
|| !sm
->merged
)
1824 if (too_many_possible(sm
) && !is_implies_function(expr
))
1827 /* bail if it gets too complicated */
1829 FOR_EACH_PTR(sm
->possible
, tmp
) {
1832 if (ptr_in_list(tmp
, already_handled
))
1834 add_ptr_list(&already_handled
, tmp
);
1836 } END_FOR_EACH_PTR(tmp
);
1837 free_slist(&already_handled
);
1838 nr_states
= get_db_state_count();
1839 if (nr_states
* nr_possible
>= 2000 && !is_implies_function(expr
))
1842 FOR_EACH_PTR(sm
->possible
, tmp
) {
1845 if (ptr_in_list(tmp
, already_handled
))
1847 add_ptr_list(&already_handled
, tmp
);
1850 __push_fake_cur_stree();
1852 overwrite_states_using_pool(sm
, tmp
);
1854 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1855 return_ranges
= show_rl(rl
);
1856 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1857 compare_str
= get_return_compare_str(expr
);
1858 /* ignore obvious stuff like 0 <= param */
1859 /* Is this worthile when we have PARAM_COMPARE? */
1861 strncmp(compare_str
, "[=", 2) != 0 &&
1862 rl_to_sval(rl
, &sval
))
1865 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1866 return_ranges
= alloc_sname(buf
);
1869 call_return_states_callbacks(return_ranges
, expr
);
1871 __free_fake_cur_stree();
1872 } END_FOR_EACH_PTR(tmp
);
1874 free_slist(&already_handled
);
1879 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1881 struct expression
*fake
;
1882 struct sm_state
*sm
;
1887 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1889 fake
= expr_get_fake_parent_expr(expr
);
1890 if (!fake
|| fake
->type
!= EXPR_ASSIGNMENT
|| fake
->op
!= '=')
1893 sm
= get_sm_state_expr(SMATCH_EXTRA
, fake
);
1895 return split_possible_helper(sm
, expr
);
1898 static bool has_possible_negative(struct sm_state
*sm
)
1900 struct sm_state
*tmp
;
1902 if (!type_signed(estate_type(sm
->state
)))
1905 FOR_EACH_PTR(sm
->possible
, tmp
) {
1906 if (!estate_rl(tmp
->state
))
1908 if (sval_is_negative(estate_min(tmp
->state
)) &&
1909 sval_is_negative(estate_max(tmp
->state
)))
1911 } END_FOR_EACH_PTR(tmp
);
1916 static bool has_separate_zero_null(struct sm_state
*sm
)
1918 struct sm_state
*tmp
;
1921 FOR_EACH_PTR(sm
->possible
, tmp
) {
1922 if (!estate_get_single_value(tmp
->state
, &sval
))
1924 if (sval
.value
== 0)
1926 } END_FOR_EACH_PTR(tmp
);
1931 static int split_positive_from_negative(struct expression
*expr
)
1933 struct sm_state
*sm
;
1934 struct range_list
*rl
;
1935 const char *return_ranges
;
1936 struct range_list
*ret_rl
;
1940 /* We're going to print the states 3 times */
1941 if (get_db_state_count() > 10000 / 3)
1944 if (!get_implied_rl(expr
, &rl
) || !rl
)
1946 /* Forget about INT_MAX and larger */
1947 if (rl_max(rl
).value
<= 0)
1949 if (!sval_is_negative(rl_min(rl
)))
1952 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1955 if (!has_possible_negative(sm
))
1957 separate_zero
= has_separate_zero_null(sm
);
1959 if (!assume(compare_expression(expr
, separate_zero
? '>' : SPECIAL_GTE
, zero_expr())))
1962 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1963 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1964 call_return_states_callbacks(return_ranges
, expr
);
1968 if (separate_zero
) {
1969 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1971 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1972 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1973 call_return_states_callbacks(return_ranges
, expr
);
1979 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1981 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1982 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1983 call_return_states_callbacks(return_ranges
, expr
);
1991 static int call_return_state_hooks_split_null_non_null_zero(struct expression
*expr
)
1993 struct range_list
*rl
;
1994 struct range_list
*nonnull_rl
;
1996 struct range_list
*null_rl
= NULL
;
1997 char *return_ranges
;
1998 struct sm_state
*sm
;
1999 struct smatch_state
*state
;
2001 int final_pass_orig
= final_pass
;
2003 if (!expr
|| expr_equal_to_param(expr
, -1))
2005 if (expr
->type
== EXPR_CALL
)
2008 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
2011 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
2014 if (!estate_rl(state
))
2016 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
2018 if (has_possible_negative(sm
))
2020 if (!has_separate_zero_null(sm
))
2023 nr_states
= get_db_state_count();
2024 if (option_info
&& nr_states
>= 1500)
2027 rl
= estate_rl(state
);
2029 __push_fake_cur_stree();
2032 __split_whole_condition(expr
);
2033 final_pass
= final_pass_orig
;
2035 nonnull_rl
= rl_filter(rl
, rl_zero());
2036 return_ranges
= show_rl(nonnull_rl
);
2037 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
2039 call_return_states_callbacks(return_ranges
, expr
);
2041 __push_true_states();
2042 __use_false_states();
2044 return_ranges
= alloc_sname("0");
2045 null_sval
= sval_type_val(rl_type(rl
), 0);
2046 add_range(&null_rl
, null_sval
, null_sval
);
2047 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
2048 call_return_states_callbacks(return_ranges
, expr
);
2050 __merge_true_states();
2051 __free_fake_cur_stree();
2056 static bool is_kernel_success_fail(struct sm_state
*sm
)
2058 struct sm_state
*tmp
;
2059 struct range_list
*rl
;
2060 bool has_zero
= false;
2061 bool has_neg
= false;
2063 if (!type_signed(estate_type(sm
->state
)))
2066 FOR_EACH_PTR(sm
->possible
, tmp
) {
2067 rl
= estate_rl(tmp
->state
);
2070 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 0) {
2075 if (rl_min(rl
).value
>= -4095 && rl_max(rl
).value
< 0)
2077 if (strcmp(tmp
->state
->name
, "s32min-(-1)") == 0)
2079 if (strcmp(tmp
->state
->name
, "s32min-(-1),1-s32max") == 0)
2082 } END_FOR_EACH_PTR(tmp
);
2084 return has_zero
&& has_neg
;
2087 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
2089 struct sm_state
*sm
;
2090 struct range_list
*rl
;
2091 struct range_list
*nonzero_rl
;
2093 struct range_list
*zero_rl
= NULL
;
2095 char *return_ranges
;
2096 int final_pass_orig
= final_pass
;
2098 if (option_project
!= PROJ_KERNEL
)
2101 nr_states
= get_db_state_count();
2102 if (nr_states
> 2000)
2105 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
2108 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
2110 if (!is_kernel_success_fail(sm
))
2113 rl
= estate_rl(sm
->state
);
2117 __push_fake_cur_stree();
2120 __split_whole_condition(expr
);
2121 final_pass
= final_pass_orig
;
2123 nonzero_rl
= rl_filter(rl
, rl_zero());
2124 nonzero_rl
= cast_rl(cur_func_return_type(), nonzero_rl
);
2125 return_ranges
= show_rl(nonzero_rl
);
2126 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
2128 call_return_states_callbacks(return_ranges
, expr
);
2130 __push_true_states();
2131 __use_false_states();
2133 return_ranges
= alloc_sname("0");
2134 zero_sval
= sval_type_val(rl_type(rl
), 0);
2135 add_range(&zero_rl
, zero_sval
, zero_sval
);
2136 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
2137 call_return_states_callbacks(return_ranges
, expr
);
2139 __merge_true_states();
2140 __free_fake_cur_stree();
2145 static int is_boolean(struct expression
*expr
)
2147 struct range_list
*rl
;
2149 if (!get_implied_rl(expr
, &rl
))
2151 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
2156 static int splitable_function_call(struct expression
*expr
)
2158 struct sm_state
*sm
;
2160 if (!expr
|| expr
->type
!= EXPR_CALL
)
2162 sm
= get_extra_sm_state(expr
);
2163 return split_possible_helper(sm
, expr
);
2166 static struct sm_state
*find_bool_param(void)
2168 struct stree
*start_states
;
2170 struct sm_state
*sm
, *tmp
;
2173 start_states
= get_start_states();
2175 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
2178 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
2181 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
2182 rl_max(estate_rl(sm
->state
)).value
!= 1)
2185 } END_FOR_EACH_PTR_REVERSE(arg
);
2191 * Check if it's splitable. If not, then splitting it up is likely not
2192 * useful for the callers.
2194 FOR_EACH_PTR(sm
->possible
, tmp
) {
2197 if (!estate_get_single_value(tmp
->state
, &sval
))
2199 } END_FOR_EACH_PTR(tmp
);
2204 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
2206 struct range_list
*ret_rl
;
2207 const char *return_ranges
;
2208 struct sm_state
*tmp
;
2210 struct state_list
*already_handled
= NULL
;
2212 if (!sm
|| !sm
->merged
)
2215 if (too_many_possible(sm
))
2218 FOR_EACH_PTR(sm
->possible
, tmp
) {
2221 if (ptr_in_list(tmp
, already_handled
))
2223 add_ptr_list(&already_handled
, tmp
);
2226 __push_fake_cur_stree();
2228 overwrite_states_using_pool(sm
, tmp
);
2230 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2231 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2232 call_return_states_callbacks(return_ranges
, expr
);
2234 __free_fake_cur_stree();
2235 } END_FOR_EACH_PTR(tmp
);
2237 free_slist(&already_handled
);
2242 static int split_by_bool_param(struct expression
*expr
)
2244 struct sm_state
*start_sm
, *sm
;
2247 start_sm
= find_bool_param();
2250 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
2251 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
2254 if (get_db_state_count() * 2 >= 2000)
2257 return split_on_bool_sm(sm
, expr
);
2260 static int split_by_null_nonnull_param(struct expression
*expr
)
2263 struct sm_state
*sm
;
2266 /* function must only take one pointer */
2267 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
2269 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
2272 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
2275 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
2277 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
2281 if (!has_separate_zero_null(sm
))
2284 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
2285 if (get_db_state_count() * nr_possible
>= 2000)
2288 return split_on_bool_sm(sm
, expr
);
2291 struct expression
*strip_expr_statement(struct expression
*expr
)
2293 struct expression
*orig
= expr
;
2294 struct statement
*stmt
, *last_stmt
;
2298 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
2300 if (expr
->type
!= EXPR_STATEMENT
)
2302 stmt
= expr
->statement
;
2303 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
2306 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
2307 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
2308 last_stmt
= last_stmt
->label_statement
;
2309 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
2311 return strip_expr(last_stmt
->expression
);
2314 static bool is_kernel_error_path(struct expression
*expr
)
2316 struct range_list
*rl
;
2319 * Splitting up returns requires resources. It also requires resources
2320 * for the caller. It doesn't seem worth it to split anything up.
2322 if (!get_implied_rl(expr
, &rl
))
2324 if (rl_type(rl
) != &int_ctype
)
2326 if (rl_min(rl
).value
>= -4095 &&
2327 rl_max(rl
).value
< 0)
2332 static void call_return_state_hooks(struct expression
*expr
)
2334 struct range_list
*ret_rl
;
2335 const char *return_ranges
;
2339 if (__path_is_null())
2342 expr
= strip_expr(expr
);
2343 expr
= strip_expr_statement(expr
);
2345 if (is_impossible_path())
2348 if (expr
&& (expr
->type
== EXPR_COMPARE
||
2349 !get_implied_value(expr
, &sval
)) &&
2350 (is_condition(expr
) || is_boolean(expr
))) {
2351 call_return_state_hooks_compare(expr
);
2353 } else if (call_return_state_hooks_conditional(expr
)) {
2355 } else if (is_kernel_error_path(expr
)) {
2357 } else if (call_return_state_hooks_split_possible(expr
)) {
2359 } else if (split_positive_from_negative(expr
)) {
2361 } else if (call_return_state_hooks_split_null_non_null_zero(expr
)) {
2363 } else if (call_return_state_hooks_split_success_fail(expr
)) {
2365 } else if (splitable_function_call(expr
)) {
2367 } else if (split_by_bool_param(expr
)) {
2368 } else if (split_by_null_nonnull_param(expr
)) {
2373 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
2374 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
2376 nr_states
= get_db_state_count();
2377 if (nr_states
>= 10000) {
2379 match_return_info(return_id
, (char *)return_ranges
, expr
);
2380 print_limited_param_set(return_id
, (char *)return_ranges
, expr
);
2381 mark_all_params_untracked(return_id
, (char *)return_ranges
, expr
);
2384 call_return_states_callbacks(return_ranges
, expr
);
2387 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
2389 struct returned_member_callback
*cb
;
2390 struct sm_state
*sm
;
2391 struct symbol
*type
;
2393 char member_name
[256];
2396 type
= get_type(expr
);
2397 if (!type
|| type
->type
!= SYM_PTR
)
2399 name
= expr_to_var(expr
);
2404 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
2405 FOR_EACH_MY_SM(cb
->owner
, __get_cur_stree(), sm
) {
2406 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
2407 strcpy(member_name
, "*$");
2408 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
2411 if (strncmp(sm
->name
, name
, len
) != 0)
2413 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
2415 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
2416 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
2417 } END_FOR_EACH_SM(sm
);
2418 } END_FOR_EACH_PTR(cb
);
2423 static void print_return_struct_info(int return_id
, char *return_ranges
,
2424 struct expression
*expr
,
2426 struct return_info_callback
*cb
)
2428 struct sm_state
*sm
;
2429 const char *printed_name
;
2432 FOR_EACH_MY_SM(cb
->owner
, __get_cur_stree(), sm
) {
2433 param
= get_param_num_from_sym(sm
->sym
);
2435 if (sm
->sym
&& sm
->sym
== sym
)
2441 printed_name
= get_param_name(sm
);
2445 cb
->callback(return_id
, return_ranges
, expr
, param
, printed_name
, sm
);
2446 } END_FOR_EACH_SM(sm
);
2449 static void print_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
2451 struct return_info_callback
*cb
;
2452 struct expression
*tmp
;
2455 if (!option_info
&& !__inline_fn
&&
2456 !local_debug
&& !option_debug
)
2459 tmp
= get_fake_variable(expr
);
2462 sym
= expr_to_sym(expr
);
2464 FOR_EACH_PTR(return_callbacks
, cb
) {
2465 __ignore_param_used
++;
2466 print_return_struct_info(return_id
, return_ranges
, expr
, sym
, cb
);
2467 __ignore_param_used
--;
2468 } END_FOR_EACH_PTR(cb
);
2471 static void reset_memdb(struct symbol
*sym
)
2473 mem_sql(NULL
, NULL
, "delete from caller_info;");
2474 mem_sql(NULL
, NULL
, "delete from return_states;");
2475 mem_sql(NULL
, NULL
, "delete from call_implies;");
2476 mem_sql(NULL
, NULL
, "delete from return_implies;");
2479 static void match_end_func_info(struct symbol
*sym
)
2481 if (__path_is_null())
2483 call_return_state_hooks(NULL
);
2486 static void match_after_func(struct symbol
*sym
)
2492 static void init_memdb(void)
2496 const char *schema_files
[] = {
2498 "db/caller_info.schema",
2499 "db/common_caller_info.schema",
2500 "db/return_states.schema",
2501 "db/function_type_size.schema",
2502 "db/type_size.schema",
2503 "db/function_type_info.schema",
2504 "db/type_info.schema",
2505 "db/call_implies.schema",
2506 "db/return_implies.schema",
2507 "db/function_ptr.schema",
2508 "db/local_values.schema",
2509 "db/function_type_value.schema",
2510 "db/type_value.schema",
2511 "db/function_type.schema",
2512 "db/data_info.schema",
2513 "db/parameter_name.schema",
2514 "db/constraints.schema",
2515 "db/constraints_required.schema",
2516 "db/fn_ptr_data_link.schema",
2517 "db/fn_data_link.schema",
2518 "db/mtag_about.schema",
2519 "db/mtag_info.schema",
2520 "db/mtag_map.schema",
2521 "db/mtag_data.schema",
2522 "db/mtag_alias.schema",
2524 static char buf
[4096];
2529 rc
= sqlite3_open(":memory:", &mem_db
);
2530 if (rc
!= SQLITE_OK
) {
2531 sm_ierror("starting In-Memory database.");
2535 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2536 fd
= open_schema_file(schema_files
[i
]);
2539 ret
= read(fd
, buf
, sizeof(buf
));
2541 sm_ierror("failed to read: %s", schema_files
[i
]);
2545 if (ret
== sizeof(buf
)) {
2546 sm_ierror("Schema file too large: %s (limit %zd bytes)",
2547 schema_files
[i
], sizeof(buf
));
2551 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
2552 if (rc
!= SQLITE_OK
) {
2553 sm_ierror("SQL error #2: %s", err
);
2554 sm_ierror("%s", buf
);
2559 static void init_cachedb(void)
2563 const char *schema_files
[] = {
2564 "db/call_implies.schema",
2565 "db/return_implies.schema",
2566 "db/type_info.schema",
2567 "db/mtag_about.schema",
2568 "db/mtag_data.schema",
2569 "db/mtag_info.schema",
2570 "db/sink_info.schema",
2572 static char buf
[4096];
2577 rc
= sqlite3_open(":memory:", &cache_db
);
2578 if (rc
!= SQLITE_OK
) {
2579 sm_ierror("starting In-Memory database.");
2583 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2584 fd
= open_schema_file(schema_files
[i
]);
2587 ret
= read(fd
, buf
, sizeof(buf
));
2589 sm_ierror("failed to read: %s", schema_files
[i
]);
2593 if (ret
== sizeof(buf
)) {
2594 sm_ierror("Schema file too large: %s (limit %zd bytes)",
2595 schema_files
[i
], sizeof(buf
));
2599 rc
= sqlite3_exec(cache_db
, buf
, NULL
, NULL
, &err
);
2600 if (rc
!= SQLITE_OK
) {
2601 sm_ierror("SQL error #2: %s", err
);
2602 sm_ierror("%s", buf
);
2607 static int save_cache_data(void *_table
, int argc
, char **argv
, char **azColName
)
2609 static char buf
[4096];
2612 char *table
= _table
;
2616 p
+= snprintf(p
, 4096 - (p
- buf
), "insert or ignore into %s values (", table
);
2617 for (i
= 0; i
< argc
; i
++) {
2619 p
+= snprintf(p
, 4096 - (p
- buf
), ", ");
2620 sqlite3_snprintf(sizeof(tmp
), tmp
, "%q", escape_newlines(argv
[i
]));
2621 p
+= snprintf(p
, 4096 - (p
- buf
), "'%s'", tmp
);
2624 p
+= snprintf(p
, 4096 - (p
- buf
), ");");
2628 sm_msg("SQL: %s", buf
);
2632 static void dump_cache(struct symbol_list
*sym_list
)
2634 const char *cache_tables
[] = {
2635 "type_info", "return_implies", "call_implies", "mtag_data",
2636 "mtag_info", "mtag_about", "sink_info",
2644 for (i
= 0; i
< ARRAY_SIZE(cache_tables
); i
++) {
2645 snprintf(buf
, sizeof(buf
), "select * from %s;", cache_tables
[i
]);
2646 cache_sql(&save_cache_data
, (char *)cache_tables
[i
], buf
);
2650 void open_smatch_db(char *db_file
)
2657 use_states
= malloc(num_checks
+ 1);
2658 memset(use_states
, 0xff, num_checks
+ 1);
2663 rc
= sqlite3_open_v2(db_file
, &smatch_db
, SQLITE_OPEN_READONLY
, NULL
);
2664 if (rc
!= SQLITE_OK
) {
2669 "PRAGMA cache_size = %d;", SQLITE_CACHE_PAGES
);
2673 static char *get_next_string(char **str
)
2675 static char string
[256];
2684 while (*p
!= '\0' && *p
!= '\n') {
2685 if (*p
== '\\' && *(p
+ 1) == ' ') {
2695 if (len
>= sizeof(string
)) {
2696 memcpy(string
, start
, sizeof(string
));
2697 string
[sizeof(string
) - 1] = '\0';
2698 sm_ierror("return_fix: '%s' too long", string
);
2702 memcpy(string
, start
, len
);
2704 for (i
= 0; i
< sizeof(string
) - 1; i
++) {
2705 if (string
[i
] == '\\' && string
[i
+ 1] == ' ') {
2706 for (j
= i
; string
[j
] != '\0'; j
++)
2707 string
[j
] = string
[j
+ 1];
2716 static void register_return_deletes(void)
2718 char *func
, *ret_str
;
2724 snprintf(filename
, 256, "db/%s.delete.return_states", option_project_str
);
2725 fd
= open_schema_file(filename
);
2728 ret
= read(fd
, buf
, sizeof(buf
));
2732 if (ret
== sizeof(buf
)) {
2733 sm_ierror("file too large: %s (limit %zd bytes)",
2734 filename
, sizeof(buf
));
2741 get_next_string(&p
);
2744 if (delete_count
== 0)
2746 if (delete_count
% 2 != 0) {
2747 printf("error parsing '%s' delete_count=%d\n", filename
, delete_count
);
2751 delete_table
= malloc(delete_count
* sizeof(char *));
2756 func
= alloc_string(get_next_string(&p
));
2757 ret_str
= alloc_string(get_next_string(&p
));
2759 delete_table
[i
++] = func
;
2760 delete_table
[i
++] = ret_str
;
2764 static void register_return_replacements(void)
2766 char *func
, *orig
, *new;
2772 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2773 fd
= open_schema_file(filename
);
2776 ret
= read(fd
, buf
, sizeof(buf
));
2780 if (ret
== sizeof(buf
)) {
2781 sm_ierror("file too large: %s (limit %zd bytes)",
2782 filename
, sizeof(buf
));
2789 get_next_string(&p
);
2792 if (replace_count
== 0 || replace_count
% 3 != 0) {
2796 replace_table
= malloc(replace_count
* sizeof(char *));
2801 func
= alloc_string(get_next_string(&p
));
2802 orig
= alloc_string(get_next_string(&p
));
2803 new = alloc_string(get_next_string(&p
));
2805 replace_table
[i
++] = func
;
2806 replace_table
[i
++] = orig
;
2807 replace_table
[i
++] = new;
2811 static void register_forced_return_splits(void)
2813 int struct_members
= sizeof(struct split_data
) / sizeof(char *);
2819 snprintf(filename
, 256, "db/%s.forced_return_splits", option_project_str
);
2820 fd
= open_schema_file(filename
);
2823 ret
= read(fd
, buf
, sizeof(buf
));
2827 if (ret
== sizeof(buf
)) {
2828 sm_ierror("file too large: %s (limit %zd bytes)",
2829 filename
, sizeof(buf
));
2836 get_next_string(&p
);
2839 if (split_count
== 0)
2841 if (split_count
% struct_members
!= 0) {
2842 printf("error parsing '%s' split_count=%d\n", filename
, split_count
);
2846 split_count
/= struct_members
;
2847 forced_splits
= malloc(split_count
* sizeof(void *));
2852 struct split_data
*split
= malloc(sizeof(*split
));
2854 split
->func
= alloc_string(get_next_string(&p
));
2855 split
->rl
= alloc_string(get_next_string(&p
));
2856 forced_splits
[i
++] = split
;
2860 void register_definition_db_callbacks(int id
)
2864 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2865 add_hook(&match_call_info_new
, FUNCTION_CALL_HOOK
);
2866 add_split_return_callback(match_return_info
);
2867 add_split_return_callback(print_returned_struct_members
);
2868 add_split_return_callback(print_return_info
);
2869 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2870 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2871 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2873 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2874 add_hook(&match_call_implies
, FUNC_DEF_HOOK
);
2875 add_hook(&match_return_implies
, CALL_HOOK_AFTER_INLINE
);
2877 common_funcs
= load_strings_from_file(option_project_str
, "common_functions");
2878 register_return_deletes();
2879 register_return_replacements();
2880 register_forced_return_splits();
2882 add_hook(&dump_cache
, END_FILE_HOOK
);
2885 void register_db_call_marker(int id
)
2887 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2890 char *get_data_info_name(struct expression
*expr
)
2897 expr
= strip_expr(expr
);
2898 name
= get_member_name(expr
);
2901 name
= expr_to_var_sym(expr
, &sym
);
2904 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2906 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2907 snprintf(buf
, sizeof(buf
), "static %s", name
);
2909 snprintf(buf
, sizeof(buf
), "global %s", name
);
2910 ret
= alloc_sname(buf
);