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 db_return_implies_callback
{
67 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
69 ALLOCATOR(db_return_implies_callback
, "return_implies callbacks");
70 DECLARE_PTR_LIST(return_implies_cb_list
, struct db_return_implies_callback
);
71 static struct return_implies_cb_list
*return_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
== USHRT_MAX
)
139 if (use_states
[sm
->owner
])
141 } END_FOR_EACH_SM(sm
);
145 void db_ignore_states(int id
)
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 return_ranges
= replace_return_ranges(return_ranges
);
156 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
157 get_base_file(), get_function(), (unsigned long)__inline_fn
,
158 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
161 static struct string_list
*common_funcs
;
162 static int is_common_function(const char *fn
)
169 if (strncmp(fn
, "__builtin_", 10) == 0)
172 FOR_EACH_PTR(common_funcs
, tmp
) {
173 if (strcmp(tmp
, fn
) == 0)
175 } END_FOR_EACH_PTR(tmp
);
180 static char *function_signature(void)
182 return type_to_str(get_real_base_type(cur_func_sym
));
185 void sql_insert_caller_info(struct expression
*call
, int type
,
186 int param
, const char *key
, const char *value
)
188 FILE *tmp_fd
= sm_outfd
;
191 if (!option_info
&& !__inline_call
)
194 if (key
&& strlen(key
) >= 80)
197 fn
= get_fnptr_name(call
->fn
);
203 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
204 get_base_file(), get_function(), fn
, (unsigned long)call
,
205 is_static(call
->fn
), type
, param
, key
, value
);
211 if (strncmp(fn
, "__builtin_", 10) == 0)
213 if (type
!= INTERNAL
&& is_common_function(fn
))
216 sm_outfd
= caller_info_fd
;
217 sm_msg("SQL_caller_info: insert into caller_info values ("
218 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
219 get_base_file(), get_function(), fn
, is_static(call
->fn
),
220 type
, param
, key
, value
);
226 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
228 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
232 void sql_insert_return_implies(int type
, int param
, const char *key
, const char *value
)
234 sql_insert_or_ignore(return_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'",
235 get_base_file(), get_function(), (unsigned long)__inline_fn
,
236 fn_static(), type
, param
, key
, value
);
239 void sql_insert_function_type_size(const char *member
, const char *ranges
)
241 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
244 void sql_insert_local_values(const char *name
, const char *value
)
246 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
249 void sql_insert_function_type_value(const char *type
, const char *value
)
251 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
254 void sql_insert_function_type(int param
, const char *value
)
256 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
257 get_base_file(), get_function(), fn_static(), param
, value
);
260 void sql_insert_parameter_name(int param
, const char *value
)
262 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
263 get_base_file(), get_function(), fn_static(), param
, value
);
266 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
270 data_name
= get_data_info_name(data
);
273 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
274 is_static(data
) ? get_base_file() : "extern",
275 data_name
, type
, value
);
278 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
280 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
281 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
285 void sql_save_constraint(const char *con
)
290 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
293 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
295 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
298 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
303 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
304 "select constraints_required.data, constraints_required.op, '%s' from "
305 "constraints_required where bound = '%s';", new_limit
, old_limit
);
308 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
310 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
313 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
315 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
318 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
319 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
320 fn
->symbol
->ident
->name
,
321 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
322 type
, param
, key
, value
);
325 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
327 sql_insert(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
328 tag
, get_filename(), get_function(), get_lineno(), left_name
, right_name
);
331 void sql_insert_mtag_data(mtag_t tag
, const char *var
, int offset
, int type
, const char *value
)
333 sql_insert(mtag_data
, "%lld, '%s', %d, %d, '%s'", tag
, var
, offset
, type
, value
);
336 void sql_insert_mtag_map(mtag_t tag
, int offset
, mtag_t container
)
338 sql_insert(mtag_map
, "%lld, %d, %lld", tag
, offset
, container
);
341 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
343 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
346 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
348 mtag_t
*saved_tag
= _tag
;
351 new_tag
= strtoll(argv
[0], NULL
, 10);
354 *saved_tag
= new_tag
;
355 else if (*saved_tag
!= new_tag
)
361 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
)
365 run_sql(save_mtag
, &tmp
,
366 "select container from mtag_map where tag = %lld and offset = %d;",
369 if (tmp
== 0 || tmp
== -1ULL)
375 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
379 run_sql(save_mtag
, &tmp
,
380 "select tag from mtag_map where container = %lld and offset = %d;",
383 if (tmp
== 0 || tmp
== -1ULL)
389 char *get_static_filter(struct symbol
*sym
)
391 static char sql_filter
[1024];
393 /* This can only happen on buggy code. Return invalid SQL. */
395 sql_filter
[0] = '\0';
399 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
400 snprintf(sql_filter
, sizeof(sql_filter
),
401 "file = '%s' and function = '%s' and static = '1'",
402 get_base_file(), sym
->ident
->name
);
404 snprintf(sql_filter
, sizeof(sql_filter
),
405 "function = '%s' and static = '0'", sym
->ident
->name
);
411 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
413 int *row_count
= _row_count
;
418 *row_count
= atoi(argv
[0]);
422 static void mark_call_params_untracked(struct expression
*call
)
424 struct expression
*arg
;
427 FOR_EACH_PTR(call
->args
, arg
) {
428 mark_untracked(call
, i
++, "$", NULL
);
429 } END_FOR_EACH_PTR(arg
);
432 static void sql_select_return_states_pointer(const char *cols
,
433 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
436 int return_count
= 0;
438 ptr
= get_fnptr_name(call
->fn
);
442 run_sql(get_row_count
, &return_count
,
443 "select count(*) from return_states join function_ptr "
444 "where return_states.function == function_ptr.function and "
445 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
446 /* The magic number 100 is just from testing on the kernel. */
447 if (return_count
> 100) {
448 mark_call_params_untracked(call
);
452 run_sql(callback
, info
,
453 "select %s from return_states join function_ptr where "
454 "return_states.function == function_ptr.function and ptr = '%s' "
455 "and searchable = 1 "
456 "order by function_ptr.file, return_states.file, return_id, type;",
460 static int is_local_symbol(struct expression
*expr
)
462 if (expr
->type
!= EXPR_SYMBOL
)
464 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
469 void sql_select_return_states(const char *cols
, struct expression
*call
,
470 int (*callback
)(void*, int, char**, char**), void *info
)
474 if (is_fake_call(call
))
477 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
478 sql_select_return_states_pointer(cols
, call
, callback
, info
);
482 if (inlinable(call
->fn
)) {
483 mem_sql(callback
, info
,
484 "select %s from return_states where call_id = '%lu' order by return_id, type;",
485 cols
, (unsigned long)call
);
489 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
490 get_static_filter(call
->fn
->symbol
));
491 if (row_count
> 3000)
494 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
495 cols
, get_static_filter(call
->fn
->symbol
));
498 void sql_select_return_implies(const char *cols
, struct expression
*call
,
499 int (*callback
)(void*, int, char**, char**))
501 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
504 if (inlinable(call
->fn
)) {
505 mem_sql(callback
, call
,
506 "select %s from return_implies where call_id = '%lu';",
507 cols
, (unsigned long)call
);
511 run_sql(callback
, call
, "select %s from return_implies where %s;",
512 cols
, get_static_filter(call
->fn
->symbol
));
515 struct select_caller_info_data
{
516 struct stree
*final_states
;
517 struct timeval start_time
;
523 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
525 static void sql_select_caller_info(struct select_caller_info_data
*data
,
526 const char *cols
, struct symbol
*sym
)
529 mem_sql(caller_info_callback
, data
,
530 "select %s from caller_info where call_id = %lu;",
531 cols
, (unsigned long)__inline_fn
);
535 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
537 run_sql(caller_info_callback
, data
,
538 "select %s from common_caller_info where %s order by call_id;",
539 cols
, get_static_filter(sym
));
543 run_sql(caller_info_callback
, data
,
544 "select %s from caller_info where %s order by call_id;",
545 cols
, get_static_filter(sym
));
548 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
550 struct def_callback
*def_callback
= __alloc_def_callback(0);
552 def_callback
->hook_type
= type
;
553 def_callback
->callback
= callback
;
554 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
558 * These call backs are used when the --info option is turned on to print struct
559 * member information. For example foo->bar could have a state in
560 * smatch_extra.c and also check_user.c.
562 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
564 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
566 member_callback
->owner
= owner
;
567 member_callback
->callback
= callback
;
568 add_ptr_list(&member_callbacks
, member_callback
);
571 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
573 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
575 callback
->callback
= fn
;
576 add_ptr_list(&returned_state_callbacks
, callback
);
579 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
))
581 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
583 member_callback
->owner
= owner
;
584 member_callback
->callback
= callback
;
585 add_ptr_list(&returned_member_callbacks
, member_callback
);
588 void select_return_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
590 struct db_return_implies_callback
*cb
= __alloc_db_return_implies_callback(0);
593 cb
->callback
= callback
;
594 add_ptr_list(&return_implies_cb_list
, cb
);
598 struct expression
*static_returns_call
;
599 struct symbol
*return_type
;
600 struct range_list
*return_range_list
;
603 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
605 struct return_info
*ret_info
= _ret_info
;
606 struct range_list
*rl
;
607 struct expression
*call_expr
= ret_info
->static_returns_call
;
611 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
612 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
616 struct range_list
*db_return_vals(struct expression
*expr
)
618 struct return_info ret_info
= {};
622 if (is_fake_call(expr
))
625 snprintf(buf
, sizeof(buf
), "return %p", expr
);
626 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
628 return clone_rl(estate_rl(sm
->state
));
629 ret_info
.static_returns_call
= expr
;
630 ret_info
.return_type
= get_type(expr
);
631 if (!ret_info
.return_type
)
634 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
637 ret_info
.return_range_list
= NULL
;
638 if (inlinable(expr
->fn
)) {
639 mem_sql(db_return_callback
, &ret_info
,
640 "select distinct return from return_states where call_id = '%lu';",
641 (unsigned long)expr
);
643 run_sql(db_return_callback
, &ret_info
,
644 "select distinct return from return_states where %s;",
645 get_static_filter(expr
->fn
->symbol
));
647 return ret_info
.return_range_list
;
650 struct range_list
*db_return_vals_from_str(const char *fn_name
)
652 struct return_info ret_info
;
654 ret_info
.static_returns_call
= NULL
;
655 ret_info
.return_type
= &llong_ctype
;
656 ret_info
.return_range_list
= NULL
;
658 run_sql(db_return_callback
, &ret_info
,
659 "select distinct return from return_states where function = '%s';",
661 return ret_info
.return_range_list
;
664 static void match_call_marker(struct expression
*expr
)
668 type
= get_type(expr
->fn
);
669 if (type
&& type
->type
== SYM_PTR
)
670 type
= get_real_base_type(type
);
673 * we just want to record something in the database so that if we have
674 * two calls like: frob(4); frob(some_unkown); then on the receiving
675 * side we know that sometimes frob is called with unknown parameters.
678 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
681 static char *show_offset(int offset
)
687 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
691 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
692 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
698 char printed_name
[256];
701 expr
= strip_expr(expr
);
704 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
705 expr
= strip_expr(expr
->unop
);
709 name
= expr_to_var_sym(expr
, &sym
);
714 FOR_EACH_SM(stree
, sm
) {
717 if (strcmp(name
, sm
->name
) == 0) {
719 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
720 else /* these are already handled. fixme: handle them here */
722 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
723 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
724 } else if (strncmp(name
, sm
->name
, len
) == 0) {
725 if (isalnum(sm
->name
[len
]))
728 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
730 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
734 callback(call
, param
, printed_name
, sm
);
735 } END_FOR_EACH_SM(sm
);
740 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
742 char **container
= _container
;
743 static char buf
[256];
745 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
750 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
751 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
753 struct expression
*tmp
;
754 char *container
= NULL
;
759 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
763 * We can't use the in-mem DB because we have to parse the function
764 * first, then we know if it takes a container, then we know to pass it
765 * the container data.
768 run_sql(¶m_used_callback
, &container
,
769 "select key from return_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
770 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
774 p
= strchr(container
, '-');
783 tmp
= get_assigned_expr(expr
);
787 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
789 expr
= strip_expr(expr
->unop
);
790 holder_offset
= get_member_offset_from_deref(expr
);
791 if (-holder_offset
!= offset
)
794 expr
= strip_expr(expr
->deref
);
795 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
796 expr
= strip_expr(expr
->unop
);
798 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
801 static void match_call_info(struct expression
*call
)
803 struct member_info_callback
*cb
;
804 struct expression
*arg
;
809 name
= get_fnptr_name(call
->fn
);
813 FOR_EACH_PTR(member_callbacks
, cb
) {
814 stree
= get_all_states_stree(cb
->owner
);
816 FOR_EACH_PTR(call
->args
, arg
) {
817 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
818 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
820 } END_FOR_EACH_PTR(arg
);
822 } END_FOR_EACH_PTR(cb
);
827 static int get_param(int param
, char **name
, struct symbol
**sym
)
833 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
835 * this is a temporary hack to work around a bug (I think in sparse?)
836 * 2.6.37-rc1:fs/reiserfs/journal.o
837 * If there is a function definition without parameter name found
838 * after a function implementation then it causes a crash.
842 if (arg
->ident
->name
< (char *)100)
845 *name
= arg
->ident
->name
;
850 } END_FOR_EACH_PTR(arg
);
855 static int function_signature_matches(const char *sig
)
859 my_sig
= function_signature();
861 return 1; /* default to matching */
862 if (strcmp(my_sig
, sig
) == 0)
867 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
869 struct select_caller_info_data
*data
= _data
;
876 struct symbol
*sym
= NULL
;
877 struct def_callback
*def_callback
;
879 struct timeval cur_time
;
886 gettimeofday(&cur_time
, NULL
);
887 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
890 func_id
= atoi(argv
[0]);
892 type
= strtol(argv
[1], NULL
, 10);
893 param
= strtol(argv
[2], NULL
, 10);
899 if (data
->prev_func_id
== -1)
900 data
->prev_func_id
= func_id
;
901 if (func_id
!= data
->prev_func_id
) {
902 stree
= __pop_fake_cur_stree();
904 merge_stree(&data
->final_states
, stree
);
906 __push_fake_cur_stree();
908 data
->prev_func_id
= func_id
;
914 if (type
== INTERNAL
&&
915 !function_signature_matches(value
)) {
920 if (param
>= 0 && !get_param(param
, &name
, &sym
))
923 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
924 if (def_callback
->hook_type
== type
)
925 def_callback
->callback(name
, sym
, key
, value
);
926 } END_FOR_EACH_PTR(def_callback
);
931 static struct string_list
*ptr_names_done
;
932 static struct string_list
*ptr_names
;
934 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
936 insert_string(&ptr_names
, alloc_string(argv
[0]));
940 static char *get_next_ptr_name(void)
944 FOR_EACH_PTR(ptr_names
, ptr
) {
945 if (list_has_string(ptr_names_done
, ptr
))
947 insert_string(&ptr_names_done
, ptr
);
949 } END_FOR_EACH_PTR(ptr
);
953 static void get_ptr_names(const char *file
, const char *name
)
955 char sql_filter
[1024];
959 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
962 snprintf(sql_filter
, 1024, "function = '%s';", name
);
965 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
967 run_sql(get_ptr_name
, NULL
,
968 "select distinct ptr from function_ptr where %s",
971 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
975 while ((name
= get_next_ptr_name()))
976 get_ptr_names(NULL
, name
);
979 static void match_data_from_db(struct symbol
*sym
)
981 struct select_caller_info_data data
= { .prev_func_id
= -1 };
984 struct timeval end_time
;
986 if (!sym
|| !sym
->ident
)
989 gettimeofday(&data
.start_time
, NULL
);
991 __push_fake_cur_stree();
997 if (sym
->ctype
.modifiers
& MOD_STATIC
)
998 get_ptr_names(get_base_file(), sym
->ident
->name
);
1000 get_ptr_names(NULL
, sym
->ident
->name
);
1002 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1003 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1004 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1005 stree
= __pop_fake_cur_stree();
1010 sql_select_caller_info(&data
,
1011 "call_id, type, parameter, key, value",
1015 stree
= __pop_fake_cur_stree();
1017 merge_stree(&data
.final_states
, stree
);
1019 __push_fake_cur_stree();
1021 data
.prev_func_id
= -1;
1024 FOR_EACH_PTR(ptr_names
, ptr
) {
1025 run_sql(caller_info_callback
, &data
,
1026 "select call_id, type, parameter, key, value"
1027 " from common_caller_info where function = '%s' order by call_id",
1029 } END_FOR_EACH_PTR(ptr
);
1032 FOR_EACH_PTR(ptr_names
, ptr
) {
1034 } END_FOR_EACH_PTR(ptr
);
1035 goto free_ptr_names
;
1038 FOR_EACH_PTR(ptr_names
, ptr
) {
1039 run_sql(caller_info_callback
, &data
,
1040 "select call_id, type, parameter, key, value"
1041 " from caller_info where function = '%s' order by call_id",
1044 } END_FOR_EACH_PTR(ptr
);
1047 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1048 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1050 sql_select_caller_info(&data
,
1051 "call_id, type, parameter, key, value",
1055 stree
= __pop_fake_cur_stree();
1057 merge_stree(&data
.final_states
, stree
);
1060 gettimeofday(&end_time
, NULL
);
1061 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1062 FOR_EACH_SM(data
.final_states
, sm
) {
1064 } END_FOR_EACH_SM(sm
);
1067 free_stree(&data
.final_states
);
1070 static int return_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1072 struct expression
*call_expr
= _call
;
1073 struct db_return_implies_callback
*cb
;
1074 struct expression
*arg
= NULL
;
1081 type
= atoi(argv
[1]);
1082 param
= atoi(argv
[2]);
1084 FOR_EACH_PTR(return_implies_cb_list
, cb
) {
1085 if (cb
->type
!= type
)
1088 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1092 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1093 } END_FOR_EACH_PTR(cb
);
1098 static void match_return_implies(struct expression
*expr
)
1100 sql_select_return_implies("function, type, parameter, key, value", expr
,
1101 return_implies_callbacks
);
1104 static void print_initializer_list(struct expression_list
*expr_list
,
1105 struct symbol
*struct_type
)
1107 struct expression
*expr
;
1108 struct symbol
*base_type
;
1109 char struct_name
[256];
1111 FOR_EACH_PTR(expr_list
, expr
) {
1112 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1113 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1116 if (expr
->type
!= EXPR_IDENTIFIER
)
1118 if (!expr
->expr_ident
)
1120 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1122 base_type
= get_type(expr
->ident_expression
);
1123 if (!base_type
|| base_type
->type
!= SYM_FN
)
1125 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1126 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1127 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1129 } END_FOR_EACH_PTR(expr
);
1132 static void global_variable(struct symbol
*sym
)
1134 struct symbol
*struct_type
;
1138 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1140 struct_type
= get_base_type(sym
);
1143 if (struct_type
->type
== SYM_ARRAY
) {
1144 struct_type
= get_base_type(struct_type
);
1148 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1150 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1153 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1155 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1158 static void call_return_state_hooks_conditional(struct expression
*expr
)
1160 struct returned_state_callback
*cb
;
1161 struct range_list
*rl
;
1162 char *return_ranges
;
1163 int final_pass_orig
= final_pass
;
1165 __push_fake_cur_stree();
1168 __split_whole_condition(expr
->conditional
);
1169 final_pass
= final_pass_orig
;
1171 if (get_implied_rl(expr
->cond_true
, &rl
))
1172 rl
= cast_rl(cur_func_return_type(), rl
);
1174 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1175 return_ranges
= show_rl(rl
);
1176 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1179 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1180 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1181 } END_FOR_EACH_PTR(cb
);
1183 __push_true_states();
1184 __use_false_states();
1186 if (get_implied_rl(expr
->cond_false
, &rl
))
1187 rl
= cast_rl(cur_func_return_type(), rl
);
1189 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1190 return_ranges
= show_rl(rl
);
1191 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1194 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1195 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1196 } END_FOR_EACH_PTR(cb
);
1198 __merge_true_states();
1199 __free_fake_cur_stree();
1202 static void call_return_state_hooks_compare(struct expression
*expr
)
1204 struct returned_state_callback
*cb
;
1205 char *return_ranges
;
1206 int final_pass_orig
= final_pass
;
1207 sval_t sval
= { .type
= &int_ctype
};
1210 if (!get_implied_value(expr
, &ret
))
1213 __push_fake_cur_stree();
1216 __split_whole_condition(expr
);
1217 final_pass
= final_pass_orig
;
1219 if (ret
.value
!= 0) {
1220 return_ranges
= alloc_sname("1");
1222 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1225 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1226 cb
->callback(return_id
, return_ranges
, expr
);
1227 } END_FOR_EACH_PTR(cb
);
1230 __push_true_states();
1231 __use_false_states();
1233 if (ret
.value
!= 1) {
1234 return_ranges
= alloc_sname("0");
1236 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1239 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1240 cb
->callback(return_id
, return_ranges
, expr
);
1241 } END_FOR_EACH_PTR(cb
);
1244 __merge_true_states();
1245 __free_fake_cur_stree();
1248 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1250 struct sm_state
*tmp
;
1252 FOR_EACH_PTR(slist
, tmp
) {
1253 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1255 } END_FOR_EACH_PTR(tmp
);
1260 static char *get_return_compare_str(struct expression
*expr
)
1268 compare_str
= expr_lte_to_param(expr
, -1);
1271 param
= get_param_num(expr
);
1275 var
= expr_to_var(expr
);
1278 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1279 comparison
= get_comparison_strings(var
, buf
);
1285 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1286 return alloc_sname(buf
);
1289 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1291 struct returned_state_callback
*cb
;
1292 struct range_list
*rl
;
1293 char *return_ranges
;
1294 struct sm_state
*tmp
;
1296 int nr_possible
, nr_states
;
1297 char *compare_str
= NULL
;
1299 struct state_list
*already_handled
= NULL
;
1301 if (!sm
|| !sm
->merged
)
1304 if (too_many_possible(sm
))
1307 /* bail if it gets too complicated */
1308 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1309 nr_states
= get_db_state_count();
1310 if (nr_states
* nr_possible
>= 2000)
1313 FOR_EACH_PTR(sm
->possible
, tmp
) {
1316 if (ptr_in_list(tmp
, already_handled
))
1318 add_ptr_list(&already_handled
, tmp
);
1321 __push_fake_cur_stree();
1323 overwrite_states_using_pool(sm
, tmp
);
1325 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1326 return_ranges
= show_rl(rl
);
1327 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1328 compare_str
= get_return_compare_str(expr
);
1330 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1331 return_ranges
= alloc_sname(buf
);
1335 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1336 cb
->callback(return_id
, return_ranges
, expr
);
1337 } END_FOR_EACH_PTR(cb
);
1339 __free_fake_cur_stree();
1340 } END_FOR_EACH_PTR(tmp
);
1342 free_slist(&already_handled
);
1347 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1349 struct sm_state
*sm
;
1351 if (!expr
|| expr_equal_to_param(expr
, -1))
1354 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1355 return split_possible_helper(sm
, expr
);
1358 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1360 struct range_list
*rl
;
1361 char *return_ranges
;
1370 return alloc_sname("");
1372 if (get_implied_value(expr
, &sval
)) {
1373 sval
= sval_cast(cur_func_return_type(), sval
);
1374 *rl_p
= alloc_rl(sval
, sval
);
1375 return sval_to_str(sval
);
1378 compare_str
= expr_equal_to_param(expr
, -1);
1379 math_str
= get_value_in_terms_of_parameter_math(expr
);
1381 if (get_implied_rl(expr
, &rl
)) {
1382 rl
= cast_rl(cur_func_return_type(), rl
);
1383 return_ranges
= show_rl(rl
);
1384 } else if (get_imaginary_absolute(expr
, &rl
)){
1385 rl
= cast_rl(cur_func_return_type(), rl
);
1386 return alloc_sname(show_rl(rl
));
1388 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1389 return_ranges
= show_rl(rl
);
1394 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1395 return alloc_sname(buf
);
1398 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1399 return alloc_sname(buf
);
1401 compare_str
= get_return_compare_str(expr
);
1403 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1404 return alloc_sname(buf
);
1407 return return_ranges
;
1410 static int split_positive_from_negative(struct expression
*expr
)
1412 struct returned_state_callback
*cb
;
1413 struct range_list
*rl
;
1414 const char *return_ranges
;
1415 struct range_list
*ret_rl
;
1418 /* We're going to print the states 3 times */
1419 if (get_db_state_count() > 10000 / 3)
1422 if (!get_implied_rl(expr
, &rl
) || !rl
)
1424 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1426 /* Forget about INT_MAX and larger */
1427 if (rl_max(rl
).value
<= 0)
1429 if (!sval_is_negative(rl_min(rl
)))
1432 if (!assume(compare_expression(expr
, '>', zero_expr())))
1436 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1437 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1438 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1439 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1440 } END_FOR_EACH_PTR(cb
);
1444 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1445 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1448 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1449 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1450 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1451 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1452 } END_FOR_EACH_PTR(cb
);
1458 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1461 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1462 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1463 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1464 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1465 } END_FOR_EACH_PTR(cb
);
1473 static bool has_possible_null(struct sm_state
*sm
)
1475 struct sm_state
*tmp
;
1478 FOR_EACH_PTR(sm
->possible
, tmp
) {
1479 if (!estate_get_single_value(tmp
->state
, &sval
))
1481 if (sval
.value
== 0)
1483 } END_FOR_EACH_PTR(tmp
);
1488 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1490 struct returned_state_callback
*cb
;
1491 struct range_list
*rl
;
1492 struct range_list
*nonnull_rl
;
1494 struct range_list
*null_rl
= NULL
;
1495 char *return_ranges
;
1496 struct sm_state
*sm
;
1497 struct smatch_state
*state
;
1499 int final_pass_orig
= final_pass
;
1501 if (!expr
|| expr_equal_to_param(expr
, -1))
1503 if (expr
->type
== EXPR_CALL
)
1505 if (!is_pointer(expr
))
1508 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1511 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1514 if (!estate_rl(state
))
1516 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1518 if (!has_possible_null(sm
))
1521 nr_states
= get_db_state_count();
1522 if (option_info
&& nr_states
>= 1500)
1525 rl
= estate_rl(state
);
1527 __push_fake_cur_stree();
1530 __split_whole_condition(expr
);
1531 final_pass
= final_pass_orig
;
1533 nonnull_rl
= rl_filter(rl
, rl_zero());
1534 return_ranges
= show_rl(nonnull_rl
);
1535 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1538 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1539 cb
->callback(return_id
, return_ranges
, expr
);
1540 } END_FOR_EACH_PTR(cb
);
1542 __push_true_states();
1543 __use_false_states();
1545 return_ranges
= alloc_sname("0");
1546 null_sval
= sval_type_val(rl_type(rl
), 0);
1547 add_range(&null_rl
, null_sval
, null_sval
);
1548 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1550 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1551 cb
->callback(return_id
, return_ranges
, expr
);
1552 } END_FOR_EACH_PTR(cb
);
1554 __merge_true_states();
1555 __free_fake_cur_stree();
1560 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1562 struct range_list
*rl
;
1563 struct range_list
*nonzero_rl
;
1565 struct range_list
*zero_rl
= NULL
;
1567 struct returned_state_callback
*cb
;
1568 char *return_ranges
;
1569 int final_pass_orig
= final_pass
;
1572 if (option_project
!= PROJ_KERNEL
)
1575 nr_states
= get_db_state_count();
1576 if (nr_states
> 1500)
1579 if (get_value(expr
, &val
))
1581 if (!get_implied_rl(expr
, &rl
))
1583 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1585 if (rl_max(rl
).value
!= 0)
1588 __push_fake_cur_stree();
1591 __split_whole_condition(expr
);
1592 final_pass
= final_pass_orig
;
1594 nonzero_rl
= rl_filter(rl
, rl_zero());
1595 return_ranges
= show_rl(nonzero_rl
);
1596 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1599 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1600 cb
->callback(return_id
, return_ranges
, expr
);
1601 } END_FOR_EACH_PTR(cb
);
1603 __push_true_states();
1604 __use_false_states();
1606 return_ranges
= alloc_sname("0");
1607 zero_sval
= sval_type_val(rl_type(rl
), 0);
1608 add_range(&zero_rl
, zero_sval
, zero_sval
);
1609 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1611 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1612 cb
->callback(return_id
, return_ranges
, expr
);
1613 } END_FOR_EACH_PTR(cb
);
1615 __merge_true_states();
1616 __free_fake_cur_stree();
1621 static int is_boolean(struct expression
*expr
)
1623 struct range_list
*rl
;
1625 if (!get_implied_rl(expr
, &rl
))
1627 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1632 static int is_conditional(struct expression
*expr
)
1636 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1641 static int splitable_function_call(struct expression
*expr
)
1643 struct sm_state
*sm
;
1646 if (!expr
|| expr
->type
!= EXPR_CALL
)
1648 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1649 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1650 return split_possible_helper(sm
, expr
);
1653 static struct sm_state
*find_bool_param(void)
1655 struct stree
*start_states
;
1657 struct sm_state
*sm
, *tmp
;
1660 start_states
= get_start_states();
1662 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1665 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1668 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1669 rl_max(estate_rl(sm
->state
)).value
!= 1)
1672 } END_FOR_EACH_PTR_REVERSE(arg
);
1678 * Check if it's splitable. If not, then splitting it up is likely not
1679 * useful for the callers.
1681 FOR_EACH_PTR(sm
->possible
, tmp
) {
1684 if (!estate_get_single_value(tmp
->state
, &sval
))
1686 } END_FOR_EACH_PTR(tmp
);
1691 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1693 struct returned_state_callback
*cb
;
1694 struct range_list
*ret_rl
;
1695 const char *return_ranges
;
1696 struct sm_state
*tmp
;
1698 int nr_possible
, nr_states
;
1699 char *compare_str
= NULL
;
1701 struct state_list
*already_handled
= NULL
;
1703 if (!sm
|| !sm
->merged
)
1706 if (too_many_possible(sm
))
1709 /* bail if it gets too complicated */
1710 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1711 nr_states
= get_db_state_count();
1712 if (nr_states
* nr_possible
>= 2000)
1715 FOR_EACH_PTR(sm
->possible
, tmp
) {
1718 if (ptr_in_list(tmp
, already_handled
))
1720 add_ptr_list(&already_handled
, tmp
);
1723 __push_fake_cur_stree();
1725 overwrite_states_using_pool(sm
, tmp
);
1727 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1728 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1729 compare_str
= get_return_compare_str(expr
);
1731 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1732 return_ranges
= alloc_sname(buf
);
1736 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1737 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1738 } END_FOR_EACH_PTR(cb
);
1740 __free_fake_cur_stree();
1741 } END_FOR_EACH_PTR(tmp
);
1743 free_slist(&already_handled
);
1748 static int split_by_bool_param(struct expression
*expr
)
1750 struct sm_state
*start_sm
, *sm
;
1753 start_sm
= find_bool_param();
1756 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1757 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1759 return split_on_bool_sm(sm
, expr
);
1762 static int split_by_null_nonnull_param(struct expression
*expr
)
1765 struct sm_state
*sm
;
1767 .type
= &ulong_ctype
,
1770 /* function must only take one pointer */
1771 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1773 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1776 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1779 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1781 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1785 if (!rl_has_sval(estate_rl(sm
->state
), zero
))
1788 return split_on_bool_sm(sm
, expr
);
1791 struct expression
*strip_expr_statement(struct expression
*expr
)
1793 struct expression
*orig
= expr
;
1794 struct statement
*stmt
, *last_stmt
;
1798 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1800 if (expr
->type
!= EXPR_STATEMENT
)
1802 stmt
= expr
->statement
;
1803 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1806 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1807 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1808 last_stmt
= last_stmt
->label_statement
;
1809 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1811 return strip_expr(last_stmt
->expression
);
1814 static void call_return_state_hooks(struct expression
*expr
)
1816 struct returned_state_callback
*cb
;
1817 struct range_list
*ret_rl
;
1818 const char *return_ranges
;
1822 if (__path_is_null())
1825 expr
= strip_expr(expr
);
1826 expr
= strip_expr_statement(expr
);
1828 if (is_impossible_path())
1831 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1832 !get_implied_value(expr
, &sval
)) &&
1833 (is_condition(expr
) || is_boolean(expr
))) {
1834 call_return_state_hooks_compare(expr
);
1836 } else if (is_conditional(expr
)) {
1837 call_return_state_hooks_conditional(expr
);
1839 } else if (call_return_state_hooks_split_possible(expr
)) {
1841 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1843 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1845 } else if (splitable_function_call(expr
)) {
1847 } else if (split_positive_from_negative(expr
)) {
1849 } else if (split_by_bool_param(expr
)) {
1850 } else if (split_by_null_nonnull_param(expr
)) {
1855 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1856 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1859 nr_states
= get_db_state_count();
1860 if (nr_states
>= 10000) {
1861 match_return_info(return_id
, (char *)return_ranges
, expr
);
1862 mark_all_params_untracked(return_id
, (char *)return_ranges
, expr
);
1865 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1866 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1867 } END_FOR_EACH_PTR(cb
);
1870 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1872 struct returned_member_callback
*cb
;
1873 struct stree
*stree
;
1874 struct sm_state
*sm
;
1875 struct symbol
*type
;
1877 char member_name
[256];
1880 type
= get_type(expr
);
1881 if (!type
|| type
->type
!= SYM_PTR
)
1883 name
= expr_to_var(expr
);
1887 member_name
[sizeof(member_name
) - 1] = '\0';
1888 strcpy(member_name
, "$");
1891 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1892 stree
= __get_cur_stree();
1893 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1894 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1895 strcpy(member_name
, "*$");
1896 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1899 if (strncmp(sm
->name
, name
, len
) != 0)
1901 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1903 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1904 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1905 } END_FOR_EACH_SM(sm
);
1906 } END_FOR_EACH_PTR(cb
);
1911 static void reset_memdb(struct symbol
*sym
)
1913 mem_sql(NULL
, NULL
, "delete from caller_info;");
1914 mem_sql(NULL
, NULL
, "delete from return_states;");
1915 mem_sql(NULL
, NULL
, "delete from call_implies;");
1916 mem_sql(NULL
, NULL
, "delete from return_implies;");
1919 static void match_end_func_info(struct symbol
*sym
)
1921 if (__path_is_null())
1923 call_return_state_hooks(NULL
);
1926 static void match_after_func(struct symbol
*sym
)
1932 static void init_memdb(void)
1936 const char *schema_files
[] = {
1938 "db/caller_info.schema",
1939 "db/return_states.schema",
1940 "db/function_type_size.schema",
1941 "db/type_size.schema",
1942 "db/call_implies.schema",
1943 "db/return_implies.schema",
1944 "db/function_ptr.schema",
1945 "db/local_values.schema",
1946 "db/function_type_value.schema",
1947 "db/type_value.schema",
1948 "db/function_type.schema",
1949 "db/data_info.schema",
1950 "db/parameter_name.schema",
1951 "db/constraints.schema",
1952 "db/constraints_required.schema",
1953 "db/fn_ptr_data_link.schema",
1954 "db/fn_data_link.schema",
1955 "db/mtag_about.schema",
1956 "db/mtag_map.schema",
1957 "db/mtag_data.schema",
1958 "db/mtag_alias.schema",
1960 static char buf
[4096];
1965 rc
= sqlite3_open(":memory:", &mem_db
);
1966 if (rc
!= SQLITE_OK
) {
1967 printf("Error starting In-Memory database.");
1971 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1972 fd
= open_data_file(schema_files
[i
]);
1974 printf("failed to open: %s\n", schema_files
[i
]);
1977 ret
= read(fd
, buf
, sizeof(buf
));
1979 printf("failed to read: %s\n", schema_files
[i
]);
1983 if (ret
== sizeof(buf
)) {
1984 printf("Schema file too large: %s (limit %zd bytes)",
1985 schema_files
[i
], sizeof(buf
));
1989 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
1990 if (rc
!= SQLITE_OK
) {
1991 fprintf(stderr
, "SQL error #2: %s\n", err
);
1992 fprintf(stderr
, "%s\n", buf
);
1997 static void init_cachedb(void)
2001 const char *schema_files
[] = {
2002 "db/return_implies.schema",
2003 "db/type_info.schema",
2005 static char buf
[4096];
2010 rc
= sqlite3_open(":memory:", &cache_db
);
2011 if (rc
!= SQLITE_OK
) {
2012 printf("Error starting In-Memory database.");
2016 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2017 fd
= open_data_file(schema_files
[i
]);
2019 printf("failed to open: %s\n", schema_files
[i
]);
2022 ret
= read(fd
, buf
, sizeof(buf
));
2024 printf("failed to read: %s\n", schema_files
[i
]);
2028 if (ret
== sizeof(buf
)) {
2029 printf("Schema file too large: %s (limit %zd bytes)",
2030 schema_files
[i
], sizeof(buf
));
2034 rc
= sqlite3_exec(cache_db
, buf
, NULL
, NULL
, &err
);
2035 if (rc
!= SQLITE_OK
) {
2036 fprintf(stderr
, "SQL error #2: %s\n", err
);
2037 fprintf(stderr
, "%s\n", buf
);
2042 static int save_cache_data(void *_table
, int argc
, char **argv
, char **azColName
)
2044 static char buf
[4096];
2046 char *table
= _table
;
2050 p
+= snprintf(p
, 4096 - (p
- buf
), "insert or ignore into %s values (", table
);
2051 for (i
= 0; i
< argc
; i
++) {
2053 p
+= snprintf(p
, 4096 - (p
- buf
), ", ");
2054 p
+= snprintf(p
, 4096 - (p
- buf
), "'%s'", argv
[i
]);
2057 p
+= snprintf(p
, 4096 - (p
- buf
), ");");
2061 sm_msg("SQL: %s", buf
);
2065 static void dump_cache(struct symbol_list
*sym_list
)
2069 cache_sql(&save_cache_data
, (char *)"type_info", "select * from type_info;");
2070 cache_sql(&save_cache_data
, (char *)"return_implies", "select * from return_implies;");
2073 void open_smatch_db(void)
2080 use_states
= malloc(num_checks
+ 1);
2081 memset(use_states
, 0xff, num_checks
+ 1);
2086 rc
= sqlite3_open_v2("smatch_db.sqlite", &smatch_db
, SQLITE_OPEN_READONLY
, NULL
);
2087 if (rc
!= SQLITE_OK
) {
2092 "PRAGMA cache_size = %d;", SQLITE_CACHE_PAGES
);
2096 static void register_common_funcs(void)
2098 struct token
*token
;
2102 if (option_project
== PROJ_NONE
)
2103 strcpy(filename
, "common_functions");
2105 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2107 token
= get_tokens_file(filename
);
2110 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2112 token
= token
->next
;
2113 while (token_type(token
) != TOKEN_STREAMEND
) {
2114 if (token_type(token
) != TOKEN_IDENT
)
2116 func
= alloc_string(show_ident(token
->ident
));
2117 add_ptr_list(&common_funcs
, func
);
2118 token
= token
->next
;
2120 clear_token_alloc();
2123 static char *get_next_string(char **str
)
2125 static char string
[256];
2134 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2139 memcpy(string
, start
, 255);
2141 printf("return_fix: '%s' too long", string
);
2145 memcpy(string
, start
, len
);
2153 static void register_return_replacements(void)
2155 char *func
, *orig
, *new;
2161 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2162 fd
= open_data_file(filename
);
2165 ret
= read(fd
, buf
, sizeof(buf
));
2169 if (ret
== sizeof(buf
)) {
2170 printf("file too large: %s (limit %zd bytes)",
2171 filename
, sizeof(buf
));
2178 get_next_string(&p
);
2181 if (replace_count
== 0 || replace_count
% 3 != 0) {
2185 replace_table
= malloc(replace_count
* sizeof(char *));
2190 func
= alloc_string(get_next_string(&p
));
2191 orig
= alloc_string(get_next_string(&p
));
2192 new = alloc_string(get_next_string(&p
));
2194 replace_table
[i
++] = func
;
2195 replace_table
[i
++] = orig
;
2196 replace_table
[i
++] = new;
2200 void register_definition_db_callbacks(int id
)
2202 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2203 add_hook(&global_variable
, BASE_HOOK
);
2204 add_hook(&global_variable
, DECLARATION_HOOK
);
2205 add_split_return_callback(match_return_info
);
2206 add_split_return_callback(print_returned_struct_members
);
2207 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2208 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2209 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2211 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2212 add_hook(&match_return_implies
, CALL_HOOK_AFTER_INLINE
);
2214 register_common_funcs();
2215 register_return_replacements();
2217 add_hook(&dump_cache
, END_FILE_HOOK
);
2220 void register_db_call_marker(int id
)
2222 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2225 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2227 struct expression
*arg
;
2229 char member_name
[256];
2234 const char *star
= "";
2236 if (expr
->type
!= EXPR_ASSIGNMENT
)
2238 name
= expr_to_var_sym(expr
->left
, sym
);
2241 if (key
[0] == '*') {
2245 if (strncmp(key
, "$", 1) != 0)
2247 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2249 return alloc_string(member_name
);
2252 while (expr
->type
== EXPR_ASSIGNMENT
)
2253 expr
= strip_expr(expr
->right
);
2254 if (expr
->type
!= EXPR_CALL
)
2257 arg
= get_argument_from_call_expr(expr
->args
, param
);
2261 return get_variable_from_key(arg
, key
, sym
);
2264 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2272 arg
= strip_expr(arg
);
2274 if (strcmp(key
, "$") == 0)
2275 return expr_to_var_sym(arg
, sym
);
2277 if (strcmp(key
, "*$") == 0) {
2278 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2279 arg
= strip_expr(arg
->unop
);
2280 return expr_to_var_sym(arg
, sym
);
2282 tmp
= expr_to_var_sym(arg
, sym
);
2285 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2287 return alloc_string(buf
);
2291 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2292 arg
= strip_expr(arg
->unop
);
2293 tmp
= expr_to_var_sym(arg
, sym
);
2296 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2297 return alloc_string(buf
);
2300 tmp
= expr_to_var_sym(arg
, sym
);
2303 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2305 return alloc_string(buf
);
2308 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2312 if (strcmp("$", key
) == 0)
2313 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2314 return get_variable_from_key(arg
, key
, sym
);
2317 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2320 static char buf
[256];
2322 name_len
= strlen(param_name
);
2324 if (strcmp(state_name
, param_name
) == 0) {
2326 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2327 strncmp(state_name
, param_name
, name_len
) == 0) {
2328 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2330 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2336 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2338 if (!sym
|| !sym
->ident
)
2341 return state_name_to_param_name(name
, sym
->ident
->name
);
2344 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2346 struct symbol
*type
;
2347 const char *sym_name
;
2349 static char buf
[256];
2352 * mtag_name is different from param_name because mtags can be a struct
2353 * instead of a struct pointer. But we want to treat it like a pointer
2354 * because really an mtag is a pointer. Or in other words, if you pass
2355 * a struct foo then you want to talk about foo.bar but with an mtag
2356 * you want to refer to it as foo->bar.
2360 if (!sym
|| !sym
->ident
)
2363 type
= get_real_base_type(sym
);
2364 if (type
&& type
->type
== SYM_BASETYPE
)
2367 sym_name
= sym
->ident
->name
;
2368 name_len
= strlen(sym_name
);
2370 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2371 strncmp(state_name
, sym_name
, name_len
) == 0) {
2372 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2376 return state_name_to_param_name(state_name
, sym_name
);
2379 const char *get_mtag_name_expr(struct expression
*expr
)
2383 const char *ret
= NULL
;
2385 name
= expr_to_var_sym(expr
, &sym
);
2389 ret
= get_mtag_name_var_sym(name
, sym
);
2395 const char *get_param_name(struct sm_state
*sm
)
2397 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2400 char *get_data_info_name(struct expression
*expr
)
2407 expr
= strip_expr(expr
);
2408 name
= get_member_name(expr
);
2411 name
= expr_to_var_sym(expr
, &sym
);
2414 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2416 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2417 snprintf(buf
, sizeof(buf
), "static %s", name
);
2419 snprintf(buf
, sizeof(buf
), "global %s", name
);
2420 ret
= alloc_sname(buf
);