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
;
32 #define SQLITE_CACHE_PAGES 1000
36 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
38 ALLOCATOR(def_callback
, "definition db hook callbacks");
39 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
40 static struct callback_list
*select_caller_info_callbacks
;
42 struct member_info_callback
{
44 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
46 ALLOCATOR(member_info_callback
, "caller_info callbacks");
47 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
48 static struct member_info_cb_list
*member_callbacks
;
50 struct returned_state_callback
{
51 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
53 ALLOCATOR(returned_state_callback
, "returned state callbacks");
54 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
55 static struct returned_state_cb_list
*returned_state_callbacks
;
57 struct returned_member_callback
{
59 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
61 ALLOCATOR(returned_member_callback
, "returned member callbacks");
62 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
63 static struct returned_member_cb_list
*returned_member_callbacks
;
65 struct call_implies_callback
{
67 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
69 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
70 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
71 static struct call_implies_cb_list
*call_implies_cb_list
;
73 void sql_exec(struct sqlite3
*db
, int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
81 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
82 if (rc
!= SQLITE_OK
&& !parse_error
) {
83 fprintf(stderr
, "SQL error #2: %s\n", err
);
84 fprintf(stderr
, "SQL: '%s'\n", sql
);
89 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
93 for (i
= 0; i
< argc
; i
++) {
96 sm_printf("%s", argv
[i
]);
102 void debug_sql(struct sqlite3
*db
, const char *sql
)
107 sql_exec(db
, print_sql_output
, NULL
, sql
);
110 static int replace_count
;
111 static char **replace_table
;
112 static const char *replace_return_ranges(const char *return_ranges
)
116 if (!get_function()) {
117 /* I have no idea why EXPORT_SYMBOL() is here */
118 return return_ranges
;
120 for (i
= 0; i
< replace_count
; i
+= 3) {
121 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
122 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
123 return replace_table
[i
+ 2];
126 return return_ranges
;
130 static char *use_states
;
131 static int get_db_state_count(void)
136 FOR_EACH_SM(__get_cur_stree(), sm
) {
137 if (sm
->owner
>= 0 && use_states
[sm
->owner
])
139 } END_FOR_EACH_SM(sm
);
143 void db_ignore_states(int id
)
148 void sql_insert_return_states(int return_id
, const char *return_ranges
,
149 int type
, int param
, const char *key
, const char *value
)
151 if (key
&& strlen(key
) >= 80)
153 return_ranges
= replace_return_ranges(return_ranges
);
154 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
155 get_base_file(), get_function(), (unsigned long)__inline_fn
,
156 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
159 static struct string_list
*common_funcs
;
160 static int is_common_function(const char *fn
)
167 if (strncmp(fn
, "__builtin_", 10) == 0)
170 FOR_EACH_PTR(common_funcs
, tmp
) {
171 if (strcmp(tmp
, fn
) == 0)
173 } END_FOR_EACH_PTR(tmp
);
178 static char *function_signature(void)
180 return type_to_str(get_real_base_type(cur_func_sym
));
183 void sql_insert_caller_info(struct expression
*call
, int type
,
184 int param
, const char *key
, const char *value
)
186 FILE *tmp_fd
= sm_outfd
;
189 if (!option_info
&& !__inline_call
)
192 if (key
&& strlen(key
) >= 80)
195 fn
= get_fnptr_name(call
->fn
);
201 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
202 get_base_file(), get_function(), fn
, (unsigned long)call
,
203 is_static(call
->fn
), type
, param
, key
, value
);
209 if (strncmp(fn
, "__builtin_", 10) == 0)
211 if (type
!= INTERNAL
&& is_common_function(fn
))
214 sm_outfd
= caller_info_fd
;
215 sm_msg("SQL_caller_info: insert into caller_info values ("
216 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
217 get_base_file(), get_function(), fn
, is_static(call
->fn
),
218 type
, param
, key
, value
);
224 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
226 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
230 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
232 sql_insert_or_ignore(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'",
233 get_base_file(), get_function(), (unsigned long)__inline_fn
,
234 fn_static(), type
, param
, key
, value
);
237 void sql_insert_function_type_size(const char *member
, const char *ranges
)
239 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
242 void sql_insert_local_values(const char *name
, const char *value
)
244 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
247 void sql_insert_function_type_value(const char *type
, const char *value
)
249 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
252 void sql_insert_function_type(int param
, const char *value
)
254 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
255 get_base_file(), get_function(), fn_static(), param
, value
);
258 void sql_insert_parameter_name(int param
, const char *value
)
260 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
261 get_base_file(), get_function(), fn_static(), param
, value
);
264 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
268 data_name
= get_data_info_name(data
);
271 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
272 is_static(data
) ? get_base_file() : "extern",
273 data_name
, type
, value
);
276 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
278 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
279 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
283 void sql_save_constraint(const char *con
)
288 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
291 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
293 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
296 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
301 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
302 "select constraints_required.data, constraints_required.op, '%s' from "
303 "constraints_required where bound = '%s';", new_limit
, old_limit
);
306 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
308 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
311 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
313 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
316 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
317 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
318 fn
->symbol
->ident
->name
,
319 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
320 type
, param
, key
, value
);
323 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
325 sql_insert(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
326 tag
, get_filename(), get_function(), get_lineno(), left_name
, right_name
);
329 void sql_insert_mtag_data(mtag_t tag
, const char *var
, int offset
, int type
, const char *value
)
331 sql_insert(mtag_data
, "%lld, '%s', %d, %d, '%s'", tag
, var
, offset
, type
, value
);
334 void sql_insert_mtag_map(mtag_t tag
, int offset
, mtag_t container
)
336 sql_insert(mtag_map
, "%lld, %d, %lld", tag
, offset
, container
);
339 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
341 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
344 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
346 mtag_t
*saved_tag
= _tag
;
349 new_tag
= strtoll(argv
[0], NULL
, 10);
352 *saved_tag
= new_tag
;
353 else if (*saved_tag
!= new_tag
)
359 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
)
363 run_sql(save_mtag
, &tmp
,
364 "select container from mtag_map where tag = %lld and offset = %d;",
367 if (tmp
== 0 || tmp
== -1ULL)
373 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
377 run_sql(save_mtag
, &tmp
,
378 "select tag from mtag_map where container = %lld and offset = %d;",
381 if (tmp
== 0 || tmp
== -1ULL)
387 char *get_static_filter(struct symbol
*sym
)
389 static char sql_filter
[1024];
391 /* This can only happen on buggy code. Return invalid SQL. */
393 sql_filter
[0] = '\0';
397 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
398 snprintf(sql_filter
, sizeof(sql_filter
),
399 "file = '%s' and function = '%s' and static = '1'",
400 get_base_file(), sym
->ident
->name
);
402 snprintf(sql_filter
, sizeof(sql_filter
),
403 "function = '%s' and static = '0'", sym
->ident
->name
);
409 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
411 int *row_count
= _row_count
;
416 *row_count
= atoi(argv
[0]);
420 static void mark_call_params_untracked(struct expression
*call
)
422 struct expression
*arg
;
425 FOR_EACH_PTR(call
->args
, arg
) {
426 mark_untracked(call
, i
++, "$", NULL
);
427 } END_FOR_EACH_PTR(arg
);
430 static void sql_select_return_states_pointer(const char *cols
,
431 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
434 int return_count
= 0;
436 ptr
= get_fnptr_name(call
->fn
);
440 run_sql(get_row_count
, &return_count
,
441 "select count(*) from return_states join function_ptr "
442 "where return_states.function == function_ptr.function and "
443 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
444 /* The magic number 100 is just from testing on the kernel. */
445 if (return_count
> 100) {
446 mark_call_params_untracked(call
);
450 run_sql(callback
, info
,
451 "select %s from return_states join function_ptr where "
452 "return_states.function == function_ptr.function and ptr = '%s' "
453 "and searchable = 1 "
454 "order by function_ptr.file, return_states.file, return_id, type;",
458 static int is_local_symbol(struct expression
*expr
)
460 if (expr
->type
!= EXPR_SYMBOL
)
462 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
467 void sql_select_return_states(const char *cols
, struct expression
*call
,
468 int (*callback
)(void*, int, char**, char**), void *info
)
472 if (is_fake_call(call
))
475 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
476 sql_select_return_states_pointer(cols
, call
, callback
, info
);
480 if (inlinable(call
->fn
)) {
481 mem_sql(callback
, info
,
482 "select %s from return_states where call_id = '%lu' order by return_id, type;",
483 cols
, (unsigned long)call
);
487 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
488 get_static_filter(call
->fn
->symbol
));
489 if (row_count
> 3000)
492 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
493 cols
, get_static_filter(call
->fn
->symbol
));
496 void sql_select_call_implies(const char *cols
, struct expression
*call
,
497 int (*callback
)(void*, int, char**, char**))
499 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
502 if (inlinable(call
->fn
)) {
503 mem_sql(callback
, call
,
504 "select %s from call_implies where call_id = '%lu';",
505 cols
, (unsigned long)call
);
509 run_sql(callback
, call
, "select %s from call_implies where %s;",
510 cols
, get_static_filter(call
->fn
->symbol
));
513 struct select_caller_info_data
{
514 struct stree
*final_states
;
515 struct timeval start_time
;
521 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
523 static void sql_select_caller_info(struct select_caller_info_data
*data
,
524 const char *cols
, struct symbol
*sym
)
527 mem_sql(caller_info_callback
, data
,
528 "select %s from caller_info where call_id = %lu;",
529 cols
, (unsigned long)__inline_fn
);
533 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
535 run_sql(caller_info_callback
, data
,
536 "select %s from common_caller_info where %s order by call_id;",
537 cols
, get_static_filter(sym
));
541 run_sql(caller_info_callback
, data
,
542 "select %s from caller_info where %s order by call_id;",
543 cols
, get_static_filter(sym
));
546 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
548 struct def_callback
*def_callback
= __alloc_def_callback(0);
550 def_callback
->hook_type
= type
;
551 def_callback
->callback
= callback
;
552 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
556 * These call backs are used when the --info option is turned on to print struct
557 * member information. For example foo->bar could have a state in
558 * smatch_extra.c and also check_user.c.
560 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
562 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
564 member_callback
->owner
= owner
;
565 member_callback
->callback
= callback
;
566 add_ptr_list(&member_callbacks
, member_callback
);
569 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
571 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
573 callback
->callback
= fn
;
574 add_ptr_list(&returned_state_callbacks
, callback
);
577 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
))
579 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
581 member_callback
->owner
= owner
;
582 member_callback
->callback
= callback
;
583 add_ptr_list(&returned_member_callbacks
, member_callback
);
586 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
588 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
591 cb
->callback
= callback
;
592 add_ptr_list(&call_implies_cb_list
, cb
);
596 struct expression
*static_returns_call
;
597 struct symbol
*return_type
;
598 struct range_list
*return_range_list
;
601 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
603 struct return_info
*ret_info
= _ret_info
;
604 struct range_list
*rl
;
605 struct expression
*call_expr
= ret_info
->static_returns_call
;
609 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
610 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
614 struct range_list
*db_return_vals(struct expression
*expr
)
616 struct return_info ret_info
= {};
620 if (is_fake_call(expr
))
623 snprintf(buf
, sizeof(buf
), "return %p", expr
);
624 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
626 return clone_rl(estate_rl(sm
->state
));
627 ret_info
.static_returns_call
= expr
;
628 ret_info
.return_type
= get_type(expr
);
629 if (!ret_info
.return_type
)
632 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
635 ret_info
.return_range_list
= NULL
;
636 if (inlinable(expr
->fn
)) {
637 mem_sql(db_return_callback
, &ret_info
,
638 "select distinct return from return_states where call_id = '%lu';",
639 (unsigned long)expr
);
641 run_sql(db_return_callback
, &ret_info
,
642 "select distinct return from return_states where %s;",
643 get_static_filter(expr
->fn
->symbol
));
645 return ret_info
.return_range_list
;
648 struct range_list
*db_return_vals_from_str(const char *fn_name
)
650 struct return_info ret_info
;
652 ret_info
.static_returns_call
= NULL
;
653 ret_info
.return_type
= &llong_ctype
;
654 ret_info
.return_range_list
= NULL
;
656 run_sql(db_return_callback
, &ret_info
,
657 "select distinct return from return_states where function = '%s';",
659 return ret_info
.return_range_list
;
662 static void match_call_marker(struct expression
*expr
)
666 type
= get_type(expr
->fn
);
667 if (type
&& type
->type
== SYM_PTR
)
668 type
= get_real_base_type(type
);
671 * we just want to record something in the database so that if we have
672 * two calls like: frob(4); frob(some_unkown); then on the receiving
673 * side we know that sometimes frob is called with unknown parameters.
676 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
679 static char *show_offset(int offset
)
685 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
689 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
690 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
696 char printed_name
[256];
699 expr
= strip_expr(expr
);
702 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
703 expr
= strip_expr(expr
->unop
);
707 name
= expr_to_var_sym(expr
, &sym
);
712 FOR_EACH_SM(stree
, sm
) {
715 if (strcmp(name
, sm
->name
) == 0) {
717 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
718 else /* these are already handled. fixme: handle them here */
720 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
721 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
722 } else if (strncmp(name
, sm
->name
, len
) == 0) {
723 if (isalnum(sm
->name
[len
]))
726 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
728 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
732 callback(call
, param
, printed_name
, sm
);
733 } END_FOR_EACH_SM(sm
);
738 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
740 char **container
= _container
;
741 static char buf
[256];
743 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
748 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
749 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
751 struct expression
*tmp
;
752 char *container
= NULL
;
757 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
761 * We can't use the in-mem DB because we have to parse the function
762 * first, then we know if it takes a container, then we know to pass it
763 * the container data.
766 run_sql(¶m_used_callback
, &container
,
767 "select key from call_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
768 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
772 p
= strchr(container
, '-');
781 tmp
= get_assigned_expr(expr
);
785 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
787 expr
= strip_expr(expr
->unop
);
788 holder_offset
= get_member_offset_from_deref(expr
);
789 if (-holder_offset
!= offset
)
792 expr
= strip_expr(expr
->deref
);
793 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
794 expr
= strip_expr(expr
->unop
);
796 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
799 static void match_call_info(struct expression
*call
)
801 struct member_info_callback
*cb
;
802 struct expression
*arg
;
807 name
= get_fnptr_name(call
->fn
);
811 FOR_EACH_PTR(member_callbacks
, cb
) {
812 stree
= get_all_states_stree(cb
->owner
);
814 FOR_EACH_PTR(call
->args
, arg
) {
815 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
816 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
818 } END_FOR_EACH_PTR(arg
);
820 } END_FOR_EACH_PTR(cb
);
825 static int get_param(int param
, char **name
, struct symbol
**sym
)
831 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
833 * this is a temporary hack to work around a bug (I think in sparse?)
834 * 2.6.37-rc1:fs/reiserfs/journal.o
835 * If there is a function definition without parameter name found
836 * after a function implementation then it causes a crash.
840 if (arg
->ident
->name
< (char *)100)
843 *name
= arg
->ident
->name
;
848 } END_FOR_EACH_PTR(arg
);
853 static int function_signature_matches(const char *sig
)
857 my_sig
= function_signature();
859 return 1; /* default to matching */
860 if (strcmp(my_sig
, sig
) == 0)
865 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
867 struct select_caller_info_data
*data
= _data
;
874 struct symbol
*sym
= NULL
;
875 struct def_callback
*def_callback
;
877 struct timeval cur_time
;
884 gettimeofday(&cur_time
, NULL
);
885 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
888 func_id
= atoi(argv
[0]);
890 type
= strtol(argv
[1], NULL
, 10);
891 param
= strtol(argv
[2], NULL
, 10);
897 if (data
->prev_func_id
== -1)
898 data
->prev_func_id
= func_id
;
899 if (func_id
!= data
->prev_func_id
) {
900 stree
= __pop_fake_cur_stree();
902 merge_stree(&data
->final_states
, stree
);
904 __push_fake_cur_stree();
906 data
->prev_func_id
= func_id
;
912 if (type
== INTERNAL
&&
913 !function_signature_matches(value
)) {
918 if (param
>= 0 && !get_param(param
, &name
, &sym
))
921 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
922 if (def_callback
->hook_type
== type
)
923 def_callback
->callback(name
, sym
, key
, value
);
924 } END_FOR_EACH_PTR(def_callback
);
929 static struct string_list
*ptr_names_done
;
930 static struct string_list
*ptr_names
;
932 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
934 insert_string(&ptr_names
, alloc_string(argv
[0]));
938 static char *get_next_ptr_name(void)
942 FOR_EACH_PTR(ptr_names
, ptr
) {
943 if (list_has_string(ptr_names_done
, ptr
))
945 insert_string(&ptr_names_done
, ptr
);
947 } END_FOR_EACH_PTR(ptr
);
951 static void get_ptr_names(const char *file
, const char *name
)
953 char sql_filter
[1024];
957 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
960 snprintf(sql_filter
, 1024, "function = '%s';", name
);
963 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
965 run_sql(get_ptr_name
, NULL
,
966 "select distinct ptr from function_ptr where %s",
969 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
973 while ((name
= get_next_ptr_name()))
974 get_ptr_names(NULL
, name
);
977 static void match_data_from_db(struct symbol
*sym
)
979 struct select_caller_info_data data
= { .prev_func_id
= -1 };
982 struct timeval end_time
;
984 if (!sym
|| !sym
->ident
)
987 gettimeofday(&data
.start_time
, NULL
);
989 __push_fake_cur_stree();
995 if (sym
->ctype
.modifiers
& MOD_STATIC
)
996 get_ptr_names(get_base_file(), sym
->ident
->name
);
998 get_ptr_names(NULL
, sym
->ident
->name
);
1000 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1001 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1002 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1003 stree
= __pop_fake_cur_stree();
1008 sql_select_caller_info(&data
,
1009 "call_id, type, parameter, key, value",
1013 stree
= __pop_fake_cur_stree();
1015 merge_stree(&data
.final_states
, stree
);
1017 __push_fake_cur_stree();
1019 data
.prev_func_id
= -1;
1022 FOR_EACH_PTR(ptr_names
, ptr
) {
1023 run_sql(caller_info_callback
, &data
,
1024 "select call_id, type, parameter, key, value"
1025 " from common_caller_info where function = '%s' order by call_id",
1027 } END_FOR_EACH_PTR(ptr
);
1030 FOR_EACH_PTR(ptr_names
, ptr
) {
1032 } END_FOR_EACH_PTR(ptr
);
1033 goto free_ptr_names
;
1036 FOR_EACH_PTR(ptr_names
, ptr
) {
1037 run_sql(caller_info_callback
, &data
,
1038 "select call_id, type, parameter, key, value"
1039 " from caller_info where function = '%s' order by call_id",
1042 } END_FOR_EACH_PTR(ptr
);
1045 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1046 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1048 sql_select_caller_info(&data
,
1049 "call_id, type, parameter, key, value",
1053 stree
= __pop_fake_cur_stree();
1055 merge_stree(&data
.final_states
, stree
);
1058 gettimeofday(&end_time
, NULL
);
1059 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1060 FOR_EACH_SM(data
.final_states
, sm
) {
1062 } END_FOR_EACH_SM(sm
);
1065 free_stree(&data
.final_states
);
1068 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1070 struct expression
*call_expr
= _call
;
1071 struct call_implies_callback
*cb
;
1072 struct expression
*arg
= NULL
;
1079 type
= atoi(argv
[1]);
1080 param
= atoi(argv
[2]);
1082 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
1083 if (cb
->type
!= type
)
1086 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1090 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1091 } END_FOR_EACH_PTR(cb
);
1096 static void match_call_implies(struct expression
*expr
)
1098 sql_select_call_implies("function, type, parameter, key, value", expr
,
1099 call_implies_callbacks
);
1102 static void print_initializer_list(struct expression_list
*expr_list
,
1103 struct symbol
*struct_type
)
1105 struct expression
*expr
;
1106 struct symbol
*base_type
;
1107 char struct_name
[256];
1109 FOR_EACH_PTR(expr_list
, expr
) {
1110 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1111 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1114 if (expr
->type
!= EXPR_IDENTIFIER
)
1116 if (!expr
->expr_ident
)
1118 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1120 base_type
= get_type(expr
->ident_expression
);
1121 if (!base_type
|| base_type
->type
!= SYM_FN
)
1123 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1124 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1125 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1127 } END_FOR_EACH_PTR(expr
);
1130 static void global_variable(struct symbol
*sym
)
1132 struct symbol
*struct_type
;
1136 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1138 struct_type
= get_base_type(sym
);
1141 if (struct_type
->type
== SYM_ARRAY
) {
1142 struct_type
= get_base_type(struct_type
);
1146 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1148 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1151 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1153 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1156 static void call_return_state_hooks_conditional(struct expression
*expr
)
1158 struct returned_state_callback
*cb
;
1159 struct range_list
*rl
;
1160 char *return_ranges
;
1161 int final_pass_orig
= final_pass
;
1163 __push_fake_cur_stree();
1166 __split_whole_condition(expr
->conditional
);
1167 final_pass
= final_pass_orig
;
1169 if (get_implied_rl(expr
->cond_true
, &rl
))
1170 rl
= cast_rl(cur_func_return_type(), rl
);
1172 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1173 return_ranges
= show_rl(rl
);
1174 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1177 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1178 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1179 } END_FOR_EACH_PTR(cb
);
1181 __push_true_states();
1182 __use_false_states();
1184 if (get_implied_rl(expr
->cond_false
, &rl
))
1185 rl
= cast_rl(cur_func_return_type(), rl
);
1187 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1188 return_ranges
= show_rl(rl
);
1189 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1192 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1193 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1194 } END_FOR_EACH_PTR(cb
);
1196 __merge_true_states();
1197 __free_fake_cur_stree();
1200 static void call_return_state_hooks_compare(struct expression
*expr
)
1202 struct returned_state_callback
*cb
;
1203 char *return_ranges
;
1204 int final_pass_orig
= final_pass
;
1205 sval_t sval
= { .type
= &int_ctype
};
1208 if (!get_implied_value(expr
, &ret
))
1211 __push_fake_cur_stree();
1214 __split_whole_condition(expr
);
1215 final_pass
= final_pass_orig
;
1217 if (ret
.value
!= 0) {
1218 return_ranges
= alloc_sname("1");
1220 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1223 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1224 cb
->callback(return_id
, return_ranges
, expr
);
1225 } END_FOR_EACH_PTR(cb
);
1228 __push_true_states();
1229 __use_false_states();
1231 if (ret
.value
!= 1) {
1232 return_ranges
= alloc_sname("0");
1234 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1237 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1238 cb
->callback(return_id
, return_ranges
, expr
);
1239 } END_FOR_EACH_PTR(cb
);
1242 __merge_true_states();
1243 __free_fake_cur_stree();
1246 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1248 struct sm_state
*tmp
;
1250 FOR_EACH_PTR(slist
, tmp
) {
1251 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1253 } END_FOR_EACH_PTR(tmp
);
1258 static char *get_return_compare_str(struct expression
*expr
)
1266 compare_str
= expr_lte_to_param(expr
, -1);
1269 param
= get_param_num(expr
);
1273 var
= expr_to_var(expr
);
1276 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1277 comparison
= get_comparison_strings(var
, buf
);
1283 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1284 return alloc_sname(buf
);
1287 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1289 struct returned_state_callback
*cb
;
1290 struct range_list
*rl
;
1291 char *return_ranges
;
1292 struct sm_state
*tmp
;
1294 int nr_possible
, nr_states
;
1295 char *compare_str
= NULL
;
1297 struct state_list
*already_handled
= NULL
;
1299 if (!sm
|| !sm
->merged
)
1302 if (too_many_possible(sm
))
1305 /* bail if it gets too complicated */
1306 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1307 nr_states
= get_db_state_count();
1308 if (nr_states
* nr_possible
>= 2000)
1311 FOR_EACH_PTR(sm
->possible
, tmp
) {
1314 if (ptr_in_list(tmp
, already_handled
))
1316 add_ptr_list(&already_handled
, tmp
);
1319 __push_fake_cur_stree();
1321 overwrite_states_using_pool(sm
, tmp
);
1323 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1324 return_ranges
= show_rl(rl
);
1325 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1326 compare_str
= get_return_compare_str(expr
);
1328 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1329 return_ranges
= alloc_sname(buf
);
1333 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1334 cb
->callback(return_id
, return_ranges
, expr
);
1335 } END_FOR_EACH_PTR(cb
);
1337 __free_fake_cur_stree();
1338 } END_FOR_EACH_PTR(tmp
);
1340 free_slist(&already_handled
);
1345 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1347 struct sm_state
*sm
;
1349 if (!expr
|| expr_equal_to_param(expr
, -1))
1352 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1353 return split_possible_helper(sm
, expr
);
1356 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1358 struct range_list
*rl
;
1359 char *return_ranges
;
1368 return alloc_sname("");
1370 if (get_implied_value(expr
, &sval
)) {
1371 sval
= sval_cast(cur_func_return_type(), sval
);
1372 *rl_p
= alloc_rl(sval
, sval
);
1373 return sval_to_str(sval
);
1376 compare_str
= expr_equal_to_param(expr
, -1);
1377 math_str
= get_value_in_terms_of_parameter_math(expr
);
1379 if (get_implied_rl(expr
, &rl
)) {
1380 rl
= cast_rl(cur_func_return_type(), rl
);
1381 return_ranges
= show_rl(rl
);
1382 } else if (get_imaginary_absolute(expr
, &rl
)){
1383 rl
= cast_rl(cur_func_return_type(), rl
);
1384 return alloc_sname(show_rl(rl
));
1386 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1387 return_ranges
= show_rl(rl
);
1392 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1393 return alloc_sname(buf
);
1396 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1397 return alloc_sname(buf
);
1399 compare_str
= get_return_compare_str(expr
);
1401 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1402 return alloc_sname(buf
);
1405 return return_ranges
;
1408 static int split_positive_from_negative(struct expression
*expr
)
1410 struct returned_state_callback
*cb
;
1411 struct range_list
*rl
;
1412 const char *return_ranges
;
1413 struct range_list
*ret_rl
;
1416 /* We're going to print the states 3 times */
1417 if (get_db_state_count() > 10000 / 3)
1420 if (!get_implied_rl(expr
, &rl
) || !rl
)
1422 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1424 /* Forget about INT_MAX and larger */
1425 if (rl_max(rl
).value
<= 0)
1427 if (!sval_is_negative(rl_min(rl
)))
1430 if (!assume(compare_expression(expr
, '>', zero_expr())))
1434 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1435 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1436 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1437 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1438 } END_FOR_EACH_PTR(cb
);
1442 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1443 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1446 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1447 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1448 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1449 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1450 } END_FOR_EACH_PTR(cb
);
1456 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1459 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1460 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1461 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1462 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1463 } END_FOR_EACH_PTR(cb
);
1471 static bool has_possible_null(struct sm_state
*sm
)
1473 struct sm_state
*tmp
;
1476 FOR_EACH_PTR(sm
->possible
, tmp
) {
1477 if (!estate_get_single_value(tmp
->state
, &sval
))
1479 if (sval
.value
== 0)
1481 } END_FOR_EACH_PTR(tmp
);
1486 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1488 struct returned_state_callback
*cb
;
1489 struct range_list
*rl
;
1490 struct range_list
*nonnull_rl
;
1492 struct range_list
*null_rl
= NULL
;
1493 char *return_ranges
;
1494 struct sm_state
*sm
;
1495 struct smatch_state
*state
;
1497 int final_pass_orig
= final_pass
;
1499 if (!expr
|| expr_equal_to_param(expr
, -1))
1501 if (expr
->type
== EXPR_CALL
)
1503 if (!is_pointer(expr
))
1506 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1509 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1512 if (!estate_rl(state
))
1514 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1516 if (!has_possible_null(sm
))
1519 nr_states
= get_db_state_count();
1520 if (option_info
&& nr_states
>= 1500)
1523 rl
= estate_rl(state
);
1525 __push_fake_cur_stree();
1528 __split_whole_condition(expr
);
1529 final_pass
= final_pass_orig
;
1531 nonnull_rl
= rl_filter(rl
, rl_zero());
1532 return_ranges
= show_rl(nonnull_rl
);
1533 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1536 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1537 cb
->callback(return_id
, return_ranges
, expr
);
1538 } END_FOR_EACH_PTR(cb
);
1540 __push_true_states();
1541 __use_false_states();
1543 return_ranges
= alloc_sname("0");
1544 null_sval
= sval_type_val(rl_type(rl
), 0);
1545 add_range(&null_rl
, null_sval
, null_sval
);
1546 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1548 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1549 cb
->callback(return_id
, return_ranges
, expr
);
1550 } END_FOR_EACH_PTR(cb
);
1552 __merge_true_states();
1553 __free_fake_cur_stree();
1558 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1560 struct range_list
*rl
;
1561 struct range_list
*nonzero_rl
;
1563 struct range_list
*zero_rl
= NULL
;
1565 struct returned_state_callback
*cb
;
1566 char *return_ranges
;
1567 int final_pass_orig
= final_pass
;
1570 if (option_project
!= PROJ_KERNEL
)
1573 nr_states
= get_db_state_count();
1574 if (nr_states
> 1500)
1577 if (get_value(expr
, &val
))
1579 if (!get_implied_rl(expr
, &rl
))
1581 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1583 if (rl_max(rl
).value
!= 0)
1586 __push_fake_cur_stree();
1589 __split_whole_condition(expr
);
1590 final_pass
= final_pass_orig
;
1592 nonzero_rl
= rl_filter(rl
, rl_zero());
1593 return_ranges
= show_rl(nonzero_rl
);
1594 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1597 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1598 cb
->callback(return_id
, return_ranges
, expr
);
1599 } END_FOR_EACH_PTR(cb
);
1601 __push_true_states();
1602 __use_false_states();
1604 return_ranges
= alloc_sname("0");
1605 zero_sval
= sval_type_val(rl_type(rl
), 0);
1606 add_range(&zero_rl
, zero_sval
, zero_sval
);
1607 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1609 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1610 cb
->callback(return_id
, return_ranges
, expr
);
1611 } END_FOR_EACH_PTR(cb
);
1613 __merge_true_states();
1614 __free_fake_cur_stree();
1619 static int is_boolean(struct expression
*expr
)
1621 struct range_list
*rl
;
1623 if (!get_implied_rl(expr
, &rl
))
1625 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1630 static int is_conditional(struct expression
*expr
)
1634 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1639 static int splitable_function_call(struct expression
*expr
)
1641 struct sm_state
*sm
;
1644 if (!expr
|| expr
->type
!= EXPR_CALL
)
1646 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1647 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1648 return split_possible_helper(sm
, expr
);
1651 static struct sm_state
*find_bool_param(void)
1653 struct stree
*start_states
;
1655 struct sm_state
*sm
, *tmp
;
1658 start_states
= get_start_states();
1660 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1663 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1666 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1667 rl_max(estate_rl(sm
->state
)).value
!= 1)
1670 } END_FOR_EACH_PTR_REVERSE(arg
);
1676 * Check if it's splitable. If not, then splitting it up is likely not
1677 * useful for the callers.
1679 FOR_EACH_PTR(sm
->possible
, tmp
) {
1682 if (!estate_get_single_value(tmp
->state
, &sval
))
1684 } END_FOR_EACH_PTR(tmp
);
1689 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1691 struct returned_state_callback
*cb
;
1692 struct range_list
*ret_rl
;
1693 const char *return_ranges
;
1694 struct sm_state
*tmp
;
1696 int nr_possible
, nr_states
;
1697 char *compare_str
= NULL
;
1699 struct state_list
*already_handled
= NULL
;
1701 if (!sm
|| !sm
->merged
)
1704 if (too_many_possible(sm
))
1707 /* bail if it gets too complicated */
1708 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1709 nr_states
= get_db_state_count();
1710 if (nr_states
* nr_possible
>= 2000)
1713 FOR_EACH_PTR(sm
->possible
, tmp
) {
1716 if (ptr_in_list(tmp
, already_handled
))
1718 add_ptr_list(&already_handled
, tmp
);
1721 __push_fake_cur_stree();
1723 overwrite_states_using_pool(sm
, tmp
);
1725 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1726 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1727 compare_str
= get_return_compare_str(expr
);
1729 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1730 return_ranges
= alloc_sname(buf
);
1734 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1735 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1736 } END_FOR_EACH_PTR(cb
);
1738 __free_fake_cur_stree();
1739 } END_FOR_EACH_PTR(tmp
);
1741 free_slist(&already_handled
);
1746 static int split_by_bool_param(struct expression
*expr
)
1748 struct sm_state
*start_sm
, *sm
;
1751 start_sm
= find_bool_param();
1754 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1755 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1757 return split_on_bool_sm(sm
, expr
);
1760 static int split_by_null_nonnull_param(struct expression
*expr
)
1763 struct sm_state
*sm
;
1765 .type
= &ulong_ctype
,
1768 /* function must only take one pointer */
1769 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1771 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1774 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1777 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1779 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1783 if (!rl_has_sval(estate_rl(sm
->state
), zero
))
1786 return split_on_bool_sm(sm
, expr
);
1789 struct expression
*strip_expr_statement(struct expression
*expr
)
1791 struct expression
*orig
= expr
;
1792 struct statement
*stmt
, *last_stmt
;
1796 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1798 if (expr
->type
!= EXPR_STATEMENT
)
1800 stmt
= expr
->statement
;
1801 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1804 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1805 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1806 last_stmt
= last_stmt
->label_statement
;
1807 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1809 return strip_expr(last_stmt
->expression
);
1812 static void call_return_state_hooks(struct expression
*expr
)
1814 struct returned_state_callback
*cb
;
1815 struct range_list
*ret_rl
;
1816 const char *return_ranges
;
1820 if (__path_is_null())
1823 expr
= strip_expr(expr
);
1824 expr
= strip_expr_statement(expr
);
1826 if (is_impossible_path())
1829 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1830 !get_implied_value(expr
, &sval
)) &&
1831 (is_condition(expr
) || is_boolean(expr
))) {
1832 call_return_state_hooks_compare(expr
);
1834 } else if (is_conditional(expr
)) {
1835 call_return_state_hooks_conditional(expr
);
1837 } else if (call_return_state_hooks_split_possible(expr
)) {
1839 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1841 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1843 } else if (splitable_function_call(expr
)) {
1845 } else if (split_positive_from_negative(expr
)) {
1847 } else if (split_by_bool_param(expr
)) {
1848 } else if (split_by_null_nonnull_param(expr
)) {
1853 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1854 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1857 nr_states
= get_db_state_count();
1858 if (nr_states
>= 10000) {
1859 match_return_info(return_id
, (char *)return_ranges
, expr
);
1860 mark_all_params_untracked(return_id
, (char *)return_ranges
, expr
);
1863 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1864 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1865 } END_FOR_EACH_PTR(cb
);
1868 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1870 struct returned_member_callback
*cb
;
1871 struct stree
*stree
;
1872 struct sm_state
*sm
;
1873 struct symbol
*type
;
1875 char member_name
[256];
1878 type
= get_type(expr
);
1879 if (!type
|| type
->type
!= SYM_PTR
)
1881 name
= expr_to_var(expr
);
1885 member_name
[sizeof(member_name
) - 1] = '\0';
1886 strcpy(member_name
, "$");
1889 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1890 stree
= __get_cur_stree();
1891 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1892 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1893 strcpy(member_name
, "*$");
1894 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1897 if (strncmp(sm
->name
, name
, len
) != 0)
1899 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1901 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1902 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1903 } END_FOR_EACH_SM(sm
);
1904 } END_FOR_EACH_PTR(cb
);
1909 static void reset_memdb(struct symbol
*sym
)
1911 mem_sql(NULL
, NULL
, "delete from caller_info;");
1912 mem_sql(NULL
, NULL
, "delete from return_states;");
1913 mem_sql(NULL
, NULL
, "delete from call_implies;");
1916 static void match_end_func_info(struct symbol
*sym
)
1918 if (__path_is_null())
1920 call_return_state_hooks(NULL
);
1923 static void match_after_func(struct symbol
*sym
)
1929 static void init_memdb(void)
1933 const char *schema_files
[] = {
1935 "db/caller_info.schema",
1936 "db/return_states.schema",
1937 "db/function_type_size.schema",
1938 "db/type_size.schema",
1939 "db/call_implies.schema",
1940 "db/function_ptr.schema",
1941 "db/local_values.schema",
1942 "db/function_type_value.schema",
1943 "db/type_value.schema",
1944 "db/function_type.schema",
1945 "db/data_info.schema",
1946 "db/parameter_name.schema",
1947 "db/constraints.schema",
1948 "db/constraints_required.schema",
1949 "db/fn_ptr_data_link.schema",
1950 "db/fn_data_link.schema",
1951 "db/mtag_about.schema",
1952 "db/mtag_map.schema",
1953 "db/mtag_data.schema",
1954 "db/mtag_alias.schema",
1956 static char buf
[4096];
1961 rc
= sqlite3_open(":memory:", &mem_db
);
1962 if (rc
!= SQLITE_OK
) {
1963 printf("Error starting In-Memory database.");
1967 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1968 fd
= open_data_file(schema_files
[i
]);
1970 printf("failed to open: %s\n", schema_files
[i
]);
1973 ret
= read(fd
, buf
, sizeof(buf
));
1975 printf("failed to read: %s\n", schema_files
[i
]);
1979 if (ret
== sizeof(buf
)) {
1980 printf("Schema file too large: %s (limit %zd bytes)",
1981 schema_files
[i
], sizeof(buf
));
1985 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
1986 if (rc
!= SQLITE_OK
) {
1987 fprintf(stderr
, "SQL error #2: %s\n", err
);
1988 fprintf(stderr
, "%s\n", buf
);
1993 static void init_cachedb(void)
1997 const char *schema_files
[] = {
1998 "db/call_implies.schema",
1999 "db/type_info.schema",
2001 static char buf
[4096];
2006 rc
= sqlite3_open(":memory:", &cache_db
);
2007 if (rc
!= SQLITE_OK
) {
2008 printf("Error starting In-Memory database.");
2012 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2013 fd
= open_data_file(schema_files
[i
]);
2015 printf("failed to open: %s\n", schema_files
[i
]);
2018 ret
= read(fd
, buf
, sizeof(buf
));
2020 printf("failed to read: %s\n", schema_files
[i
]);
2024 if (ret
== sizeof(buf
)) {
2025 printf("Schema file too large: %s (limit %zd bytes)",
2026 schema_files
[i
], sizeof(buf
));
2030 rc
= sqlite3_exec(cache_db
, buf
, NULL
, NULL
, &err
);
2031 if (rc
!= SQLITE_OK
) {
2032 fprintf(stderr
, "SQL error #2: %s\n", err
);
2033 fprintf(stderr
, "%s\n", buf
);
2038 static int save_cache_data(void *_table
, int argc
, char **argv
, char **azColName
)
2040 static char buf
[4096];
2042 char *table
= _table
;
2046 p
+= snprintf(p
, 4096 - (p
- buf
), "insert or ignore into %s values (", table
);
2047 for (i
= 0; i
< argc
; i
++) {
2049 p
+= snprintf(p
, 4096 - (p
- buf
), ", ");
2050 p
+= snprintf(p
, 4096 - (p
- buf
), "'%s'", argv
[i
]);
2053 p
+= snprintf(p
, 4096 - (p
- buf
), ");");
2057 sm_msg("SQL: %s", buf
);
2061 static void dump_cache(struct symbol_list
*sym_list
)
2065 cache_sql(&save_cache_data
, (char *)"type_info", "select * from type_info;");
2066 cache_sql(&save_cache_data
, (char *)"call_implies", "select * from call_implies;");
2069 void open_smatch_db(void)
2076 use_states
= malloc(num_checks
+ 1);
2077 memset(use_states
, 0xff, num_checks
+ 1);
2082 rc
= sqlite3_open_v2("smatch_db.sqlite", &smatch_db
, SQLITE_OPEN_READONLY
, NULL
);
2083 if (rc
!= SQLITE_OK
) {
2088 "PRAGMA cache_size = %d;", SQLITE_CACHE_PAGES
);
2092 static void register_common_funcs(void)
2094 struct token
*token
;
2098 if (option_project
== PROJ_NONE
)
2099 strcpy(filename
, "common_functions");
2101 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2103 token
= get_tokens_file(filename
);
2106 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2108 token
= token
->next
;
2109 while (token_type(token
) != TOKEN_STREAMEND
) {
2110 if (token_type(token
) != TOKEN_IDENT
)
2112 func
= alloc_string(show_ident(token
->ident
));
2113 add_ptr_list(&common_funcs
, func
);
2114 token
= token
->next
;
2116 clear_token_alloc();
2119 static char *get_next_string(char **str
)
2121 static char string
[256];
2130 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2135 memcpy(string
, start
, 255);
2137 printf("return_fix: '%s' too long", string
);
2141 memcpy(string
, start
, len
);
2149 static void register_return_replacements(void)
2151 char *func
, *orig
, *new;
2157 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2158 fd
= open_data_file(filename
);
2161 ret
= read(fd
, buf
, sizeof(buf
));
2165 if (ret
== sizeof(buf
)) {
2166 printf("file too large: %s (limit %zd bytes)",
2167 filename
, sizeof(buf
));
2174 get_next_string(&p
);
2177 if (replace_count
== 0 || replace_count
% 3 != 0) {
2181 replace_table
= malloc(replace_count
* sizeof(char *));
2186 func
= alloc_string(get_next_string(&p
));
2187 orig
= alloc_string(get_next_string(&p
));
2188 new = alloc_string(get_next_string(&p
));
2190 replace_table
[i
++] = func
;
2191 replace_table
[i
++] = orig
;
2192 replace_table
[i
++] = new;
2196 void register_definition_db_callbacks(int id
)
2198 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2199 add_hook(&global_variable
, BASE_HOOK
);
2200 add_hook(&global_variable
, DECLARATION_HOOK
);
2201 add_split_return_callback(match_return_info
);
2202 add_split_return_callback(print_returned_struct_members
);
2203 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2204 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2205 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2207 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2208 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
2210 register_common_funcs();
2211 register_return_replacements();
2213 add_hook(&dump_cache
, END_FILE_HOOK
);
2216 void register_db_call_marker(int id
)
2218 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2221 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2223 struct expression
*arg
;
2225 char member_name
[256];
2230 const char *star
= "";
2232 if (expr
->type
!= EXPR_ASSIGNMENT
)
2234 name
= expr_to_var_sym(expr
->left
, sym
);
2237 if (key
[0] == '*') {
2241 if (strncmp(key
, "$", 1) != 0)
2243 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2245 return alloc_string(member_name
);
2248 while (expr
->type
== EXPR_ASSIGNMENT
)
2249 expr
= strip_expr(expr
->right
);
2250 if (expr
->type
!= EXPR_CALL
)
2253 arg
= get_argument_from_call_expr(expr
->args
, param
);
2257 return get_variable_from_key(arg
, key
, sym
);
2260 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2268 arg
= strip_expr(arg
);
2270 if (strcmp(key
, "$") == 0)
2271 return expr_to_var_sym(arg
, sym
);
2273 if (strcmp(key
, "*$") == 0) {
2274 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2275 arg
= strip_expr(arg
->unop
);
2276 return expr_to_var_sym(arg
, sym
);
2278 tmp
= expr_to_var_sym(arg
, sym
);
2281 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2283 return alloc_string(buf
);
2287 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2288 arg
= strip_expr(arg
->unop
);
2289 tmp
= expr_to_var_sym(arg
, sym
);
2292 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2293 return alloc_string(buf
);
2296 tmp
= expr_to_var_sym(arg
, sym
);
2299 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2301 return alloc_string(buf
);
2304 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2308 if (strcmp("$", key
) == 0)
2309 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2310 return get_variable_from_key(arg
, key
, sym
);
2313 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2316 static char buf
[256];
2318 name_len
= strlen(param_name
);
2320 if (strcmp(state_name
, param_name
) == 0) {
2322 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2323 strncmp(state_name
, param_name
, name_len
) == 0) {
2324 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2326 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2332 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2334 if (!sym
|| !sym
->ident
)
2337 return state_name_to_param_name(name
, sym
->ident
->name
);
2340 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2342 struct symbol
*type
;
2343 const char *sym_name
;
2345 static char buf
[256];
2348 * mtag_name is different from param_name because mtags can be a struct
2349 * instead of a struct pointer. But we want to treat it like a pointer
2350 * because really an mtag is a pointer. Or in other words, if you pass
2351 * a struct foo then you want to talk about foo.bar but with an mtag
2352 * you want to refer to it as foo->bar.
2356 if (!sym
|| !sym
->ident
)
2359 type
= get_real_base_type(sym
);
2360 if (type
&& type
->type
== SYM_BASETYPE
)
2363 sym_name
= sym
->ident
->name
;
2364 name_len
= strlen(sym_name
);
2366 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2367 strncmp(state_name
, sym_name
, name_len
) == 0) {
2368 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2372 return state_name_to_param_name(state_name
, sym_name
);
2375 const char *get_mtag_name_expr(struct expression
*expr
)
2379 const char *ret
= NULL
;
2381 name
= expr_to_var_sym(expr
, &sym
);
2385 ret
= get_mtag_name_var_sym(name
, sym
);
2391 const char *get_param_name(struct sm_state
*sm
)
2393 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2396 char *get_data_info_name(struct expression
*expr
)
2403 expr
= strip_expr(expr
);
2404 name
= get_member_name(expr
);
2407 name
= expr_to_var_sym(expr
, &sym
);
2410 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2412 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2413 snprintf(buf
, sizeof(buf
), "static %s", name
);
2415 snprintf(buf
, sizeof(buf
), "global %s", name
);
2416 ret
= alloc_sname(buf
);