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"
27 static sqlite3
*mem_db
;
31 #define sql_insert(table, values...) \
37 char *err, *p = buf; \
40 p += snprintf(p, buf + sizeof(buf) - p, \
41 "insert into %s values (", #table); \
42 p += snprintf(p, buf + sizeof(buf) - p, values); \
43 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
44 sm_debug("in-mem: %s\n", buf); \
45 rc = sqlite3_exec(mem_db, buf, NULL, 0, &err); \
46 if (rc != SQLITE_OK) { \
47 fprintf(stderr, "SQL error #2: %s\n", err); \
48 fprintf(stderr, "SQL: '%s'\n", buf); \
54 sm_printf("SQL: insert into " #table " values (" values); \
61 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
63 ALLOCATOR(def_callback
, "definition db hook callbacks");
64 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
65 static struct callback_list
*callbacks
;
67 struct member_info_callback
{
69 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct smatch_state
*state
);
71 ALLOCATOR(member_info_callback
, "caller_info callbacks");
72 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
73 static struct member_info_cb_list
*member_callbacks
;
75 struct returned_state_callback
{
76 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
78 ALLOCATOR(returned_state_callback
, "returned state callbacks");
79 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
80 static struct returned_state_cb_list
*returned_state_callbacks
;
82 struct returned_member_callback
{
84 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
86 ALLOCATOR(returned_member_callback
, "returned member callbacks");
87 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
88 static struct returned_member_cb_list
*returned_member_callbacks
;
90 struct call_implies_callback
{
92 void (*callback
)(struct expression
*arg
, char *key
, char *value
);
94 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
95 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
96 static struct call_implies_cb_list
*call_implies_cb_list
;
98 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
102 for (i
= 0; i
< argc
; i
++) {
105 sm_printf("%s", argv
[i
]);
111 void debug_sql(const char *sql
)
116 sql_exec(print_sql_output
, NULL
, sql
);
120 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
125 if (option_no_db
|| !db
)
128 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
129 if (rc
!= SQLITE_OK
) {
130 fprintf(stderr
, "SQL error #2: %s\n", err
);
131 fprintf(stderr
, "SQL: '%s'\n", sql
);
135 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
143 rc
= sqlite3_exec(mem_db
, sql
, callback
, data
, &err
);
144 if (rc
!= SQLITE_OK
) {
145 fprintf(stderr
, "SQL error #2: %s\n", err
);
146 fprintf(stderr
, "SQL: '%s'\n", sql
);
150 void sql_insert_return_states(int return_id
, const char *return_ranges
,
151 int type
, int param
, const char *key
, const char *value
)
153 if (key
&& strlen(key
) >= 80)
155 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
156 get_base_file(), get_function(), (unsigned long)__inline_fn
,
157 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
160 static struct string_list
*common_funcs
;
161 static int is_common_function(const char *fn
)
165 if (strncmp(fn
, "__builtin_", 10) == 0)
168 FOR_EACH_PTR(common_funcs
, tmp
) {
169 if (strcmp(tmp
, fn
) == 0)
171 } END_FOR_EACH_PTR(tmp
);
176 void sql_insert_caller_info(struct expression
*call
, int type
,
177 int param
, const char *key
, const char *value
)
181 if (!option_info
&& !__inline_call
)
184 if (key
&& strlen(key
) >= 80)
187 fn
= get_fnptr_name(call
->fn
);
193 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
194 get_base_file(), get_function(), fn
, (unsigned long)call
,
195 is_static(call
->fn
), type
, param
, key
, value
);
201 if (is_common_function(fn
))
204 sm_msg("SQL_caller_info: insert into caller_info values ("
205 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
206 get_base_file(), get_function(), fn
, is_static(call
->fn
),
207 type
, param
, key
, value
);
212 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
214 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
218 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
220 sql_insert(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', %s", get_base_file(),
221 get_function(), (unsigned long)__inline_fn
, fn_static(),
222 type
, param
, key
, value
);
225 void sql_insert_function_type_size(const char *member
, const char *ranges
)
227 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
230 void sql_insert_local_values(const char *name
, const char *value
)
232 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
235 void sql_insert_function_type_value(const char *type
, const char *value
)
237 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
240 void sql_insert_function_type_info(int param
, const char *value
)
242 sql_insert(function_type_info
, "'%s', '%s', %d, %d, '%s'",
243 get_base_file(), get_function(), fn_static(), param
, value
);
246 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
250 data_name
= get_data_info_name(data
);
253 sql_insert(data_info
, "'%s', '%s', %d, '%s'", get_base_file(), data_name
, type
, value
);
256 static char *get_static_filter(struct symbol
*sym
)
258 static char sql_filter
[1024];
260 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
261 snprintf(sql_filter
, sizeof(sql_filter
),
262 "file = '%s' and function = '%s' and static = '1'",
263 get_base_file(), sym
->ident
->name
);
265 snprintf(sql_filter
, sizeof(sql_filter
),
266 "function = '%s' and static = '0'", sym
->ident
->name
);
272 static int row_count
;
273 static int get_row_count(void *unused
, int argc
, char **argv
, char **azColName
)
277 row_count
= atoi(argv
[0]);
281 static void sql_select_return_states_pointer(const char *cols
,
282 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
286 ptr
= get_fnptr_name(call
->fn
);
290 run_sql(callback
, info
,
291 "select %s from return_states join function_ptr where "
292 "return_states.function == function_ptr.function and ptr = '%s'"
293 "and searchable = 1 order by return_id, type;",
297 void sql_select_return_states(const char *cols
, struct expression
*call
,
298 int (*callback
)(void*, int, char**, char**), void *info
)
300 if (is_fake_call(call
))
303 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
) {
304 sql_select_return_states_pointer(cols
, call
, callback
, info
);
308 if (inlinable(call
->fn
)) {
309 mem_sql(callback
, info
,
310 "select %s from return_states where call_id = '%lu' order by return_id, type;",
311 cols
, (unsigned long)call
);
316 run_sql(get_row_count
, info
, "select count(*) from return_states where %s;",
317 get_static_filter(call
->fn
->symbol
));
318 if (row_count
> 3000)
321 run_sql(callback
, info
, "select %s from return_states where %s order by return_id, type;",
322 cols
, get_static_filter(call
->fn
->symbol
));
325 void sql_select_call_implies(const char *cols
, struct expression
*call
,
326 int (*callback
)(void*, int, char**, char**))
328 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
331 if (inlinable(call
->fn
)) {
332 mem_sql(callback
, NULL
,
333 "select %s from call_implies where call_id = '%lu';",
334 cols
, (unsigned long)call
);
338 run_sql(callback
, NULL
, "select %s from call_implies where %s;",
339 cols
, get_static_filter(call
->fn
->symbol
));
342 void sql_select_caller_info(const char *cols
, struct symbol
*sym
,
343 int (*callback
)(void*, int, char**, char**))
346 mem_sql(callback
, NULL
,
347 "select %s from caller_info where call_id = %lu;",
348 cols
, (unsigned long)__inline_fn
);
352 run_sql(callback
, NULL
,
353 "select %s from caller_info where %s order by call_id;",
354 cols
, get_static_filter(sym
));
357 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
359 struct def_callback
*def_callback
= __alloc_def_callback(0);
361 def_callback
->hook_type
= type
;
362 def_callback
->callback
= callback
;
363 add_ptr_list(&callbacks
, def_callback
);
367 * These call backs are used when the --info option is turned on to print struct
368 * member information. For example foo->bar could have a state in
369 * smatch_extra.c and also check_user.c.
371 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct smatch_state
*state
))
373 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
375 member_callback
->owner
= owner
;
376 member_callback
->callback
= callback
;
377 add_ptr_list(&member_callbacks
, member_callback
);
380 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
382 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
384 callback
->callback
= fn
;
385 add_ptr_list(&returned_state_callbacks
, callback
);
388 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
))
390 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
392 member_callback
->owner
= owner
;
393 member_callback
->callback
= callback
;
394 add_ptr_list(&returned_member_callbacks
, member_callback
);
397 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*arg
, char *key
, char *value
))
399 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
402 cb
->callback
= callback
;
403 add_ptr_list(&call_implies_cb_list
, cb
);
406 static struct expression
*static_call_expr
;
407 static struct expression
*static_returns_call
;
408 static struct symbol
*return_type
;
409 static struct range_list
*return_range_list
;
410 static int db_return_callback(void *unused
, int argc
, char **argv
, char **azColName
)
412 struct range_list
*rl
;
413 struct expression
*call_expr
= static_returns_call
;
417 call_results_to_rl(call_expr
, return_type
, argv
[0], &rl
);
418 return_range_list
= rl_union(return_range_list
, rl
);
422 struct range_list
*db_return_vals(struct expression
*expr
)
424 static_returns_call
= expr
;
425 return_type
= get_type(expr
);
428 if (is_fake_call(expr
))
430 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
433 return_range_list
= NULL
;
434 if (inlinable(expr
->fn
)) {
435 mem_sql(db_return_callback
, NULL
,
436 "select distinct return from return_states where call_id = '%lu';",
437 (unsigned long)expr
);
439 run_sql(db_return_callback
, NULL
,
440 "select distinct return from return_states where %s;",
441 get_static_filter(expr
->fn
->symbol
));
443 return return_range_list
;
446 static void match_call_marker(struct expression
*expr
)
449 * we just want to record something in the database so that if we have
450 * two calls like: frob(4); frob(some_unkown); then on the receiving
451 * side we know that sometimes frob is called with unknown parameters.
454 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", "");
457 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
458 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct smatch_state
*state
))
464 char printed_name
[256];
467 expr
= strip_expr(expr
);
468 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
469 expr
= strip_expr(expr
->unop
);
473 name
= expr_to_var_sym(expr
, &sym
);
478 FOR_EACH_SM(stree
, sm
) {
481 if (strcmp(name
, sm
->name
) == 0) {
483 snprintf(printed_name
, sizeof(printed_name
), "*$");
484 else /* these are already handled. fixme: handle them here */
486 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
487 snprintf(printed_name
, sizeof(printed_name
), "*$");
488 } else if (strncmp(name
, sm
->name
, len
) == 0) {
490 snprintf(printed_name
, sizeof(printed_name
), "$->%s", sm
->name
+ len
+ 1);
492 snprintf(printed_name
, sizeof(printed_name
), "$%s", sm
->name
+ len
);
496 callback(call
, param
, printed_name
, sm
->state
);
497 } END_FOR_EACH_SM(sm
);
502 static void match_call_info(struct expression
*call
)
504 struct member_info_callback
*cb
;
505 struct expression
*arg
;
510 name
= get_fnptr_name(call
->fn
);
514 FOR_EACH_PTR(member_callbacks
, cb
) {
515 stree
= get_all_states_stree(cb
->owner
);
517 FOR_EACH_PTR(call
->args
, arg
) {
518 print_struct_members(call
, arg
, i
, stree
, cb
->callback
);
520 } END_FOR_EACH_PTR(arg
);
522 } END_FOR_EACH_PTR(cb
);
527 static int get_param(int param
, char **name
, struct symbol
**sym
)
533 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
535 * this is a temporary hack to work around a bug (I think in sparse?)
536 * 2.6.37-rc1:fs/reiserfs/journal.o
537 * If there is a function definition without parameter name found
538 * after a function implementation then it causes a crash.
542 if (arg
->ident
->name
< (char *)100)
545 *name
= arg
->ident
->name
;
550 } END_FOR_EACH_PTR(arg
);
555 static struct stree
*final_states
;
556 static int prev_func_id
= -1;
557 static int caller_info_callback(void *unused
, int argc
, char **argv
, char **azColName
)
565 struct symbol
*sym
= NULL
;
566 struct def_callback
*def_callback
;
572 func_id
= atoi(argv
[0]);
574 type
= strtol(argv
[1], NULL
, 10);
575 param
= strtol(argv
[2], NULL
, 10);
582 if (prev_func_id
== -1)
583 prev_func_id
= func_id
;
584 if (func_id
!= prev_func_id
) {
585 stree
= __pop_fake_cur_stree();
586 merge_stree(&final_states
, stree
);
588 __push_fake_cur_stree();
590 prev_func_id
= func_id
;
593 if (param
>= 0 && !get_param(param
, &name
, &sym
))
596 FOR_EACH_PTR(callbacks
, def_callback
) {
597 if (def_callback
->hook_type
== type
)
598 def_callback
->callback(name
, sym
, key
, value
);
599 } END_FOR_EACH_PTR(def_callback
);
604 static void get_direct_callers(struct symbol
*sym
)
606 sql_select_caller_info("call_id, type, parameter, key, value", sym
,
607 caller_info_callback
);
610 static struct string_list
*ptr_names_done
;
611 static struct string_list
*ptr_names
;
613 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
615 insert_string(&ptr_names
, alloc_string(argv
[0]));
619 static char *get_next_ptr_name(void)
623 FOR_EACH_PTR(ptr_names
, ptr
) {
624 if (list_has_string(ptr_names_done
, ptr
))
626 insert_string(&ptr_names_done
, ptr
);
628 } END_FOR_EACH_PTR(ptr
);
632 static void get_ptr_names(const char *file
, const char *name
)
634 char sql_filter
[1024];
638 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
641 snprintf(sql_filter
, 1024, "function = '%s';", name
);
644 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
646 run_sql(get_ptr_name
, NULL
,
647 "select distinct ptr from function_ptr where %s",
650 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
654 while ((name
= get_next_ptr_name()))
655 get_ptr_names(NULL
, name
);
658 static void match_data_from_db(struct symbol
*sym
)
663 if (!sym
|| !sym
->ident
)
666 __push_fake_cur_stree();
673 if (sym
->ctype
.modifiers
& MOD_STATIC
)
674 get_ptr_names(get_base_file(), sym
->ident
->name
);
676 get_ptr_names(NULL
, sym
->ident
->name
);
678 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
679 __free_ptr_list((struct ptr_list
**)&ptr_names
);
680 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
681 stree
= __pop_fake_cur_stree();
686 get_direct_callers(sym
);
688 FOR_EACH_PTR(ptr_names
, ptr
) {
689 run_sql(caller_info_callback
, NULL
,
690 "select call_id, type, parameter, key, value"
691 " from caller_info where function = '%s' order by call_id",
694 } END_FOR_EACH_PTR(ptr
);
696 __free_ptr_list((struct ptr_list
**)&ptr_names
);
697 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
699 get_direct_callers(sym
);
702 stree
= __pop_fake_cur_stree();
703 merge_stree(&final_states
, stree
);
706 FOR_EACH_SM(final_states
, sm
) {
708 } END_FOR_EACH_SM(sm
);
710 free_stree(&final_states
);
713 static int call_implies_callbacks(void *unused
, int argc
, char **argv
, char **azColName
)
715 struct expression
*call_expr
= static_call_expr
;
716 struct call_implies_callback
*cb
;
717 struct expression
*arg
= NULL
;
724 type
= atoi(argv
[1]);
725 param
= atoi(argv
[2]);
727 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
728 if (cb
->type
!= type
)
731 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
735 cb
->callback(arg
, argv
[3], argv
[4]);
736 } END_FOR_EACH_PTR(cb
);
741 static void match_call_implies(struct expression
*expr
)
743 static_call_expr
= expr
;
744 sql_select_call_implies("function, type, parameter, key, value", expr
,
745 call_implies_callbacks
);
749 static void print_initializer_list(struct expression_list
*expr_list
,
750 struct symbol
*struct_type
)
752 struct expression
*expr
;
753 struct symbol
*base_type
;
754 char struct_name
[256];
756 FOR_EACH_PTR(expr_list
, expr
) {
757 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
758 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
761 if (expr
->type
!= EXPR_IDENTIFIER
)
763 if (!expr
->expr_ident
)
765 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
767 base_type
= get_type(expr
->ident_expression
);
768 if (!base_type
|| base_type
->type
!= SYM_FN
)
770 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
771 struct_type
->ident
->name
, expr
->expr_ident
->name
);
772 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
774 } END_FOR_EACH_PTR(expr
);
777 static void global_variable(struct symbol
*sym
)
779 struct symbol
*struct_type
;
783 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
785 struct_type
= get_base_type(sym
);
788 if (struct_type
->type
== SYM_ARRAY
) {
789 struct_type
= get_base_type(struct_type
);
793 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
795 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
798 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
800 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", "");
803 static void call_return_state_hooks_conditional(struct expression
*expr
)
805 struct returned_state_callback
*cb
;
806 struct range_list
*rl
;
808 int final_pass_orig
= final_pass
;
810 __push_fake_cur_stree();
813 __split_whole_condition(expr
->conditional
);
814 final_pass
= final_pass_orig
;
816 if (get_implied_rl(expr
->cond_true
, &rl
))
817 rl
= cast_rl(cur_func_return_type(), rl
);
819 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
820 return_ranges
= show_rl(rl
);
823 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
824 cb
->callback(return_id
, return_ranges
, expr
);
825 } END_FOR_EACH_PTR(cb
);
827 __push_true_states();
828 __use_false_states();
830 if (get_implied_rl(expr
->cond_false
, &rl
))
831 rl
= cast_rl(cur_func_return_type(), rl
);
833 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
834 return_ranges
= show_rl(rl
);
837 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
838 cb
->callback(return_id
, return_ranges
, expr
);
839 } END_FOR_EACH_PTR(cb
);
841 __merge_true_states();
842 __free_fake_cur_stree();
845 static void call_return_state_hooks_compare(struct expression
*expr
)
847 struct returned_state_callback
*cb
;
849 int final_pass_orig
= final_pass
;
851 __push_fake_cur_stree();
854 __split_whole_condition(expr
);
855 final_pass
= final_pass_orig
;
857 return_ranges
= alloc_sname("1");
860 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
861 cb
->callback(return_id
, return_ranges
, expr
);
862 } END_FOR_EACH_PTR(cb
);
864 __push_true_states();
865 __use_false_states();
867 return_ranges
= alloc_sname("0");;
869 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
870 cb
->callback(return_id
, return_ranges
, expr
);
871 } END_FOR_EACH_PTR(cb
);
873 __merge_true_states();
874 __free_fake_cur_stree();
877 static int split_helper(struct sm_state
*sm
, struct expression
*expr
)
879 struct returned_state_callback
*cb
;
880 struct range_list
*rl
;
882 struct sm_state
*tmp
;
884 int nr_possible
, nr_states
;
888 if (!sm
|| !sm
->merged
)
891 if (too_many_possible(sm
))
894 /* bail if it gets too complicated */
895 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
896 nr_states
= stree_count(__get_cur_stree());
898 * the main thing option_info because we don't want to print a
899 * million lines of output. If someone else, like check_locking.c
900 * wants this data, then it doesn't cause a slow down to provide it.
902 if (option_info
&& nr_states
* nr_possible
>= 2000)
905 compare_str
= expr_lte_to_param(expr
, -1);
907 FOR_EACH_PTR(sm
->possible
, tmp
) {
912 __push_fake_cur_stree();
914 overwrite_states_using_pool(tmp
);
916 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
917 return_ranges
= show_rl(rl
);
919 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
920 return_ranges
= alloc_sname(buf
);
924 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
925 cb
->callback(return_id
, return_ranges
, expr
);
926 } END_FOR_EACH_PTR(cb
);
928 __free_fake_cur_stree();
929 } END_FOR_EACH_PTR(tmp
);
934 static int call_return_state_hooks_split_possible(struct expression
*expr
)
936 struct returned_state_callback
*cb
;
937 struct range_list
*rl
;
940 struct sm_state
*tmp
;
942 int nr_possible
, nr_states
;
946 if (!expr
|| expr_equal_to_param(expr
, -1))
949 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
950 if (!sm
|| !sm
->merged
)
953 if (too_many_possible(sm
))
956 /* bail if it gets too complicated */
957 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
958 nr_states
= stree_count(__get_cur_stree());
960 * the main thing option_info because we don't want to print a
961 * million lines of output. If someone else, like check_locking.c
962 * wants this data, then it doesn't cause a slow down to provide it.
964 if (option_info
&& nr_states
* nr_possible
>= 2000)
968 FOR_EACH_PTR(sm
->possible
, tmp
) {
973 __push_fake_cur_stree();
975 overwrite_states_using_pool(tmp
);
977 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
978 return_ranges
= show_rl(rl
);
980 compare_str
= expr_lte_to_param(expr
, -1);
982 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
983 return_ranges
= alloc_sname(buf
);
987 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
988 cb
->callback(return_id
, return_ranges
, expr
);
989 } END_FOR_EACH_PTR(cb
);
991 __free_fake_cur_stree();
992 } END_FOR_EACH_PTR(tmp
);
997 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
999 struct range_list
*rl
;
1001 struct returned_state_callback
*cb
;
1002 char *return_ranges
;
1003 int final_pass_orig
= final_pass
;
1005 if (option_project
!= PROJ_KERNEL
)
1008 nr_states
= stree_count(__get_cur_stree());
1009 if (nr_states
> 1500)
1012 if (!get_implied_rl(expr
, &rl
))
1014 if (rl_min(rl
).value
< -4095)
1016 if (rl_max(rl
).value
!= 0)
1019 __push_fake_cur_stree();
1022 __split_whole_condition(expr
);
1023 final_pass
= final_pass_orig
;
1025 return_ranges
= show_rl(rl_filter(rl
, rl_zero()));
1028 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1029 cb
->callback(return_id
, return_ranges
, expr
);
1030 } END_FOR_EACH_PTR(cb
);
1032 __push_true_states();
1033 __use_false_states();
1035 return_ranges
= alloc_sname("0");;
1037 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1038 cb
->callback(return_id
, return_ranges
, expr
);
1039 } END_FOR_EACH_PTR(cb
);
1041 __merge_true_states();
1042 __free_fake_cur_stree();
1047 static const char *get_return_ranges_str(struct expression
*expr
)
1049 struct range_list
*rl
;
1050 char *return_ranges
;
1057 return alloc_sname("");
1059 if (get_implied_value(expr
, &sval
))
1060 return sval_to_str(sval
);
1062 compare_str
= expr_equal_to_param(expr
, -1);
1063 math_str
= get_value_in_terms_of_parameter_math(expr
);
1065 if (get_implied_rl(expr
, &rl
)) {
1066 rl
= cast_rl(cur_func_return_type(), rl
);
1067 return_ranges
= show_rl(rl
);
1069 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1070 return_ranges
= show_rl(rl
);
1074 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1075 return alloc_sname(buf
);
1079 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1080 return alloc_sname(buf
);
1083 compare_str
= expr_lte_to_param(expr
, -1);
1085 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1086 return alloc_sname(buf
);
1088 return return_ranges
;
1091 static int is_boolean(struct expression
*expr
)
1093 struct range_list
*rl
;
1095 if (!get_implied_rl(expr
, &rl
))
1097 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1102 static int is_conditional(struct expression
*expr
)
1106 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1111 static int splitable_function_call(struct expression
*expr
)
1113 struct sm_state
*sm
;
1116 if (!expr
|| expr
->type
!= EXPR_CALL
)
1118 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1119 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1120 return split_helper(sm
, expr
);
1123 static void call_return_state_hooks(struct expression
*expr
)
1125 struct returned_state_callback
*cb
;
1126 const char *return_ranges
;
1129 expr
= strip_expr(expr
);
1131 if (is_condition(expr
) || is_boolean(expr
)) {
1132 call_return_state_hooks_compare(expr
);
1134 } else if (is_conditional(expr
)) {
1135 call_return_state_hooks_conditional(expr
);
1137 } else if (call_return_state_hooks_split_possible(expr
)) {
1139 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1141 } else if (splitable_function_call(expr
)) {
1145 return_ranges
= get_return_ranges_str(expr
);
1148 nr_states
= stree_count(__get_cur_stree());
1149 if (nr_states
>= 10000) {
1150 match_return_info(return_id
, (char *)return_ranges
, expr
);
1153 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1154 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1155 } END_FOR_EACH_PTR(cb
);
1158 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1160 struct returned_member_callback
*cb
;
1161 struct stree
*stree
;
1162 struct sm_state
*sm
;
1163 struct symbol
*type
;
1165 char member_name
[256];
1168 type
= get_type(expr
);
1169 if (!type
|| type
->type
!= SYM_PTR
)
1171 name
= expr_to_var(expr
);
1175 member_name
[sizeof(member_name
) - 1] = '\0';
1176 strcpy(member_name
, "$");
1179 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1180 stree
= __get_cur_stree();
1181 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1182 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1183 strcpy(member_name
, "*$");
1184 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1187 if (strncmp(sm
->name
, name
, len
) != 0)
1189 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1191 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1192 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1193 } END_FOR_EACH_SM(sm
);
1194 } END_FOR_EACH_PTR(cb
);
1199 static void reset_memdb(void)
1201 mem_sql(NULL
, NULL
, "delete from caller_info;");
1202 mem_sql(NULL
, NULL
, "delete from return_states;");
1203 mem_sql(NULL
, NULL
, "delete from call_implies;");
1206 static void match_end_func_info(struct symbol
*sym
)
1208 if (__path_is_null())
1210 call_return_state_hooks(NULL
);
1215 static void init_memdb(void)
1219 const char *schema_files
[] = {
1221 "db/caller_info.schema",
1222 "db/return_states.schema",
1223 "db/function_type_size.schema",
1224 "db/type_size.schema",
1225 "db/call_implies.schema",
1226 "db/function_ptr.schema",
1227 "db/local_values.schema",
1228 "db/function_type_value.schema",
1229 "db/type_value.schema",
1230 "db/function_type_info.schema",
1231 "db/data_info.schema",
1233 static char buf
[4096];
1238 rc
= sqlite3_open(":memory:", &mem_db
);
1239 if (rc
!= SQLITE_OK
) {
1240 printf("Error starting In-Memory database.");
1244 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1245 fd
= open_data_file(schema_files
[i
]);
1250 ret
= read(fd
, buf
, sizeof(buf
));
1251 if (ret
== sizeof(buf
)) {
1252 printf("Schema file too large: %s (limit %zd bytes)",
1253 schema_files
[i
], sizeof(buf
));
1256 rc
= sqlite3_exec(mem_db
, buf
, NULL
, 0, &err
);
1257 if (rc
!= SQLITE_OK
) {
1258 fprintf(stderr
, "SQL error #2: %s\n", err
);
1259 fprintf(stderr
, "%s\n", buf
);
1264 void open_smatch_db(void)
1273 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
1274 if (rc
!= SQLITE_OK
) {
1281 static void register_common_funcs(void)
1283 struct token
*token
;
1287 if (option_project
== PROJ_NONE
)
1288 strcpy(filename
, "common_functions");
1290 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
1292 token
= get_tokens_file(filename
);
1295 if (token_type(token
) != TOKEN_STREAMBEGIN
)
1297 token
= token
->next
;
1298 while (token_type(token
) != TOKEN_STREAMEND
) {
1299 if (token_type(token
) != TOKEN_IDENT
)
1301 func
= alloc_string(show_ident(token
->ident
));
1302 add_ptr_list(&common_funcs
, func
);
1303 token
= token
->next
;
1305 clear_token_alloc();
1309 void register_definition_db_callbacks(int id
)
1311 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
1312 add_hook(&global_variable
, BASE_HOOK
);
1313 add_hook(&global_variable
, DECLARATION_HOOK
);
1314 add_split_return_callback(match_return_info
);
1315 add_split_return_callback(print_returned_struct_members
);
1316 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
1317 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
1319 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
1320 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
1322 register_common_funcs();
1325 void register_db_call_marker(int id
)
1327 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
1330 char *return_state_to_var_sym(struct expression
*expr
, int param
, char *key
, struct symbol
**sym
)
1332 struct expression
*arg
;
1334 char member_name
[256];
1339 const char *star
= "";
1341 if (expr
->type
!= EXPR_ASSIGNMENT
)
1343 name
= expr_to_var_sym(expr
->left
, sym
);
1346 if (key
[0] == '*') {
1350 if (strncmp(key
, "$", 1) != 0)
1352 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
1354 return alloc_string(member_name
);
1357 while (expr
->type
== EXPR_ASSIGNMENT
)
1358 expr
= strip_expr(expr
->right
);
1359 if (expr
->type
!= EXPR_CALL
)
1362 arg
= get_argument_from_call_expr(expr
->args
, param
);
1366 return get_variable_from_key(arg
, key
, sym
);
1369 char *get_variable_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
)
1374 arg
= strip_expr(arg
);
1376 if (strcmp(key
, "$") == 0)
1377 return expr_to_var_sym(arg
, sym
);
1379 if (strcmp(key
, "*$") == 0) {
1380 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
1381 arg
= strip_expr(arg
->unop
);
1382 return expr_to_var_sym(arg
, sym
);
1384 tmp
= expr_to_var_sym(arg
, sym
);
1387 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
1389 return alloc_string(buf
);
1393 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
1394 arg
= strip_expr(arg
->unop
);
1395 tmp
= expr_to_var_sym(arg
, sym
);
1398 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
1399 return alloc_string(buf
);
1402 tmp
= expr_to_var_sym(arg
, sym
);
1405 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
1407 return alloc_string(buf
);
1410 const char *get_param_name(struct sm_state
*sm
)
1414 static char buf
[256];
1416 if (!sm
->sym
->ident
)
1419 param_name
= sm
->sym
->ident
->name
;
1420 name_len
= strlen(param_name
);
1422 if (strcmp(sm
->name
, param_name
) == 0) {
1424 } else if (sm
->name
[name_len
] == '-' && /* check for '-' from "->" */
1425 strncmp(sm
->name
, param_name
, name_len
) == 0) {
1426 snprintf(buf
, sizeof(buf
), "$%s", sm
->name
+ name_len
);
1428 } else if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, param_name
) == 0) {
1434 char *get_data_info_name(struct expression
*expr
)
1441 expr
= strip_expr(expr
);
1442 name
= get_member_name(expr
);
1445 name
= expr_to_var_sym(expr
, &sym
);
1448 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
1450 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1451 snprintf(buf
, sizeof(buf
), "static %s", name
);
1453 snprintf(buf
, sizeof(buf
), "global %s", name
);
1454 ret
= alloc_sname(buf
);