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_implies_callback
{
67 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
69 ALLOCATOR(db_implies_callback
, "return_implies callbacks");
70 DECLARE_PTR_LIST(db_implies_cb_list
, struct db_implies_callback
);
71 static struct db_implies_cb_list
*return_implies_cb_list
;
72 static struct db_implies_cb_list
*call_implies_cb_list
;
74 void sql_exec(struct sqlite3
*db
, int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
82 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
83 if (rc
!= SQLITE_OK
&& !parse_error
) {
84 fprintf(stderr
, "SQL error #2: %s\n", err
);
85 fprintf(stderr
, "SQL: '%s'\n", sql
);
90 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
94 for (i
= 0; i
< argc
; i
++) {
97 sm_printf("%s", argv
[i
]);
103 void debug_sql(struct sqlite3
*db
, const char *sql
)
108 sql_exec(db
, print_sql_output
, NULL
, sql
);
111 static int replace_count
;
112 static char **replace_table
;
113 static const char *replace_return_ranges(const char *return_ranges
)
117 if (!get_function()) {
118 /* I have no idea why EXPORT_SYMBOL() is here */
119 return return_ranges
;
121 for (i
= 0; i
< replace_count
; i
+= 3) {
122 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
123 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
124 return replace_table
[i
+ 2];
127 return return_ranges
;
131 static char *use_states
;
132 static int get_db_state_count(void)
137 FOR_EACH_SM(__get_cur_stree(), sm
) {
138 if (sm
->owner
== USHRT_MAX
)
140 if (use_states
[sm
->owner
])
142 } END_FOR_EACH_SM(sm
);
146 void db_ignore_states(int id
)
151 void sql_insert_return_states(int return_id
, const char *return_ranges
,
152 int type
, int param
, const char *key
, const char *value
)
154 if (key
&& strlen(key
) >= 80)
156 return_ranges
= replace_return_ranges(return_ranges
);
157 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
158 get_base_file(), get_function(), (unsigned long)__inline_fn
,
159 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
162 static struct string_list
*common_funcs
;
163 static int is_common_function(const char *fn
)
170 if (strncmp(fn
, "__builtin_", 10) == 0)
173 FOR_EACH_PTR(common_funcs
, tmp
) {
174 if (strcmp(tmp
, fn
) == 0)
176 } END_FOR_EACH_PTR(tmp
);
181 static char *function_signature(void)
183 return type_to_str(get_real_base_type(cur_func_sym
));
186 void sql_insert_caller_info(struct expression
*call
, int type
,
187 int param
, const char *key
, const char *value
)
189 FILE *tmp_fd
= sm_outfd
;
192 if (!option_info
&& !__inline_call
)
195 if (key
&& strlen(key
) >= 80)
198 fn
= get_fnptr_name(call
->fn
);
204 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
205 get_base_file(), get_function(), fn
, (unsigned long)call
,
206 is_static(call
->fn
), type
, param
, key
, value
);
212 if (strncmp(fn
, "__builtin_", 10) == 0)
214 if (type
!= INTERNAL
&& is_common_function(fn
))
217 sm_outfd
= caller_info_fd
;
218 sm_msg("SQL_caller_info: insert into caller_info values ("
219 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
220 get_base_file(), get_function(), fn
, is_static(call
->fn
),
221 type
, param
, key
, value
);
227 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
229 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
233 void sql_insert_return_implies(int type
, int param
, const char *key
, const char *value
)
235 sql_insert_or_ignore(return_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'",
236 get_base_file(), get_function(), (unsigned long)__inline_fn
,
237 fn_static(), type
, param
, key
, value
);
240 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
242 sql_insert_or_ignore(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'",
243 get_base_file(), get_function(), (unsigned long)__inline_fn
,
244 fn_static(), type
, param
, key
, value
);
247 void sql_insert_function_type_size(const char *member
, const char *ranges
)
249 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
252 void sql_insert_local_values(const char *name
, const char *value
)
254 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
257 void sql_insert_function_type_value(const char *type
, const char *value
)
259 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
262 void sql_insert_function_type(int param
, const char *value
)
264 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
265 get_base_file(), get_function(), fn_static(), param
, value
);
268 void sql_insert_parameter_name(int param
, const char *value
)
270 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
271 get_base_file(), get_function(), fn_static(), param
, value
);
274 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
278 data_name
= get_data_info_name(data
);
281 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
282 is_static(data
) ? get_base_file() : "extern",
283 data_name
, type
, value
);
286 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
288 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
289 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
293 void sql_save_constraint(const char *con
)
298 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
301 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
303 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
306 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
311 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
312 "select constraints_required.data, constraints_required.op, '%s' from "
313 "constraints_required where bound = '%s';", new_limit
, old_limit
);
316 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
318 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
321 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
323 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
326 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
327 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
328 fn
->symbol
->ident
->name
,
329 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
330 type
, param
, key
, value
);
333 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
335 sql_insert(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
336 tag
, get_filename(), get_function(), get_lineno(), left_name
, right_name
);
339 void sql_insert_mtag_data(mtag_t tag
, const char *var
, int offset
, int type
, const char *value
)
341 sql_insert(mtag_data
, "%lld, '%s', %d, %d, '%s'", tag
, var
, offset
, type
, value
);
344 void sql_insert_mtag_map(mtag_t tag
, int offset
, mtag_t container
)
346 sql_insert(mtag_map
, "%lld, %d, %lld", tag
, offset
, container
);
349 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
351 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
354 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
356 mtag_t
*saved_tag
= _tag
;
359 new_tag
= strtoll(argv
[0], NULL
, 10);
362 *saved_tag
= new_tag
;
363 else if (*saved_tag
!= new_tag
)
369 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
)
373 run_sql(save_mtag
, &tmp
,
374 "select container from mtag_map where tag = %lld and offset = %d;",
377 if (tmp
== 0 || tmp
== -1ULL)
383 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
387 run_sql(save_mtag
, &tmp
,
388 "select tag from mtag_map where container = %lld and offset = %d;",
391 if (tmp
== 0 || tmp
== -1ULL)
397 char *get_static_filter(struct symbol
*sym
)
399 static char sql_filter
[1024];
401 /* This can only happen on buggy code. Return invalid SQL. */
403 sql_filter
[0] = '\0';
407 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
408 snprintf(sql_filter
, sizeof(sql_filter
),
409 "file = '%s' and function = '%s' and static = '1'",
410 get_base_file(), sym
->ident
->name
);
412 snprintf(sql_filter
, sizeof(sql_filter
),
413 "function = '%s' and static = '0'", sym
->ident
->name
);
419 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
421 int *row_count
= _row_count
;
426 *row_count
= atoi(argv
[0]);
430 static void mark_call_params_untracked(struct expression
*call
)
432 struct expression
*arg
;
435 FOR_EACH_PTR(call
->args
, arg
) {
436 mark_untracked(call
, i
++, "$", NULL
);
437 } END_FOR_EACH_PTR(arg
);
440 static void sql_select_return_states_pointer(const char *cols
,
441 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
444 int return_count
= 0;
446 ptr
= get_fnptr_name(call
->fn
);
450 run_sql(get_row_count
, &return_count
,
451 "select count(*) from return_states join function_ptr "
452 "where return_states.function == function_ptr.function and "
453 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
454 /* The magic number 100 is just from testing on the kernel. */
455 if (return_count
> 100) {
456 mark_call_params_untracked(call
);
460 run_sql(callback
, info
,
461 "select %s from return_states join function_ptr where "
462 "return_states.function == function_ptr.function and ptr = '%s' "
463 "and searchable = 1 "
464 "order by function_ptr.file, return_states.file, return_id, type;",
468 static int is_local_symbol(struct expression
*expr
)
470 if (expr
->type
!= EXPR_SYMBOL
)
472 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
477 void sql_select_return_states(const char *cols
, struct expression
*call
,
478 int (*callback
)(void*, int, char**, char**), void *info
)
482 if (is_fake_call(call
))
485 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
486 sql_select_return_states_pointer(cols
, call
, callback
, info
);
490 if (inlinable(call
->fn
)) {
491 mem_sql(callback
, info
,
492 "select %s from return_states where call_id = '%lu' order by return_id, type;",
493 cols
, (unsigned long)call
);
497 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
498 get_static_filter(call
->fn
->symbol
));
499 if (row_count
> 3000)
502 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
503 cols
, get_static_filter(call
->fn
->symbol
));
506 #define CALL_IMPLIES 0
507 #define RETURN_IMPLIES 1
509 struct implies_info
{
511 struct db_implies_cb_list
*cb_list
;
512 struct expression
*expr
;
516 void sql_select_implies(const char *cols
, struct implies_info
*info
,
517 int (*callback
)(void*, int, char**, char**))
519 if (info
->type
== RETURN_IMPLIES
&& inlinable(info
->expr
->fn
)) {
520 mem_sql(callback
, info
,
521 "select %s from return_implies where call_id = '%lu';",
522 cols
, (unsigned long)info
->expr
);
526 run_sql(callback
, info
, "select %s from %s_implies where %s;",
528 info
->type
== CALL_IMPLIES
? "call" : "return",
529 get_static_filter(info
->sym
));
532 struct select_caller_info_data
{
533 struct stree
*final_states
;
534 struct timeval start_time
;
540 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
542 static void sql_select_caller_info(struct select_caller_info_data
*data
,
543 const char *cols
, struct symbol
*sym
)
546 mem_sql(caller_info_callback
, data
,
547 "select %s from caller_info where call_id = %lu;",
548 cols
, (unsigned long)__inline_fn
);
552 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
554 run_sql(caller_info_callback
, data
,
555 "select %s from common_caller_info where %s order by call_id;",
556 cols
, get_static_filter(sym
));
560 run_sql(caller_info_callback
, data
,
561 "select %s from caller_info where %s order by call_id;",
562 cols
, get_static_filter(sym
));
565 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
567 struct def_callback
*def_callback
= __alloc_def_callback(0);
569 def_callback
->hook_type
= type
;
570 def_callback
->callback
= callback
;
571 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
575 * These call backs are used when the --info option is turned on to print struct
576 * member information. For example foo->bar could have a state in
577 * smatch_extra.c and also check_user.c.
579 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
581 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
583 member_callback
->owner
= owner
;
584 member_callback
->callback
= callback
;
585 add_ptr_list(&member_callbacks
, member_callback
);
588 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
590 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
592 callback
->callback
= fn
;
593 add_ptr_list(&returned_state_callbacks
, callback
);
596 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
))
598 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
600 member_callback
->owner
= owner
;
601 member_callback
->callback
= callback
;
602 add_ptr_list(&returned_member_callbacks
, member_callback
);
605 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
607 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
610 cb
->callback
= callback
;
611 add_ptr_list(&call_implies_cb_list
, cb
);
614 void select_return_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
616 struct db_implies_callback
*cb
= __alloc_db_implies_callback(0);
619 cb
->callback
= callback
;
620 add_ptr_list(&return_implies_cb_list
, cb
);
624 struct expression
*static_returns_call
;
625 struct symbol
*return_type
;
626 struct range_list
*return_range_list
;
629 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
631 struct return_info
*ret_info
= _ret_info
;
632 struct range_list
*rl
;
633 struct expression
*call_expr
= ret_info
->static_returns_call
;
637 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
638 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
642 struct range_list
*db_return_vals(struct expression
*expr
)
644 struct return_info ret_info
= {};
648 if (is_fake_call(expr
))
651 snprintf(buf
, sizeof(buf
), "return %p", expr
);
652 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
654 return clone_rl(estate_rl(sm
->state
));
655 ret_info
.static_returns_call
= expr
;
656 ret_info
.return_type
= get_type(expr
);
657 if (!ret_info
.return_type
)
660 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
663 ret_info
.return_range_list
= NULL
;
664 if (inlinable(expr
->fn
)) {
665 mem_sql(db_return_callback
, &ret_info
,
666 "select distinct return from return_states where call_id = '%lu';",
667 (unsigned long)expr
);
669 run_sql(db_return_callback
, &ret_info
,
670 "select distinct return from return_states where %s;",
671 get_static_filter(expr
->fn
->symbol
));
673 return ret_info
.return_range_list
;
676 struct range_list
*db_return_vals_from_str(const char *fn_name
)
678 struct return_info ret_info
;
680 ret_info
.static_returns_call
= NULL
;
681 ret_info
.return_type
= &llong_ctype
;
682 ret_info
.return_range_list
= NULL
;
684 run_sql(db_return_callback
, &ret_info
,
685 "select distinct return from return_states where function = '%s';",
687 return ret_info
.return_range_list
;
690 static void match_call_marker(struct expression
*expr
)
694 type
= get_type(expr
->fn
);
695 if (type
&& type
->type
== SYM_PTR
)
696 type
= get_real_base_type(type
);
699 * we just want to record something in the database so that if we have
700 * two calls like: frob(4); frob(some_unkown); then on the receiving
701 * side we know that sometimes frob is called with unknown parameters.
704 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
707 static char *show_offset(int offset
)
713 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
717 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
718 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
724 char printed_name
[256];
727 expr
= strip_expr(expr
);
730 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
731 expr
= strip_expr(expr
->unop
);
735 name
= expr_to_var_sym(expr
, &sym
);
740 FOR_EACH_SM(stree
, sm
) {
743 if (strcmp(name
, sm
->name
) == 0) {
745 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
746 else /* these are already handled. fixme: handle them here */
748 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
749 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
750 } else if (strncmp(name
, sm
->name
, len
) == 0) {
751 if (isalnum(sm
->name
[len
]))
754 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
756 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
760 callback(call
, param
, printed_name
, sm
);
761 } END_FOR_EACH_SM(sm
);
766 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
768 char **container
= _container
;
769 static char buf
[256];
771 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
776 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
777 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
779 struct expression
*tmp
;
780 char *container
= NULL
;
785 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
789 * We can't use the in-mem DB because we have to parse the function
790 * first, then we know if it takes a container, then we know to pass it
791 * the container data.
794 run_sql(¶m_used_callback
, &container
,
795 "select key from return_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
796 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
800 p
= strchr(container
, '-');
809 tmp
= get_assigned_expr(expr
);
813 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
815 expr
= strip_expr(expr
->unop
);
816 holder_offset
= get_member_offset_from_deref(expr
);
817 if (-holder_offset
!= offset
)
820 expr
= strip_expr(expr
->deref
);
821 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
822 expr
= strip_expr(expr
->unop
);
824 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
827 static void match_call_info(struct expression
*call
)
829 struct member_info_callback
*cb
;
830 struct expression
*arg
;
835 name
= get_fnptr_name(call
->fn
);
839 FOR_EACH_PTR(member_callbacks
, cb
) {
840 stree
= get_all_states_stree(cb
->owner
);
842 FOR_EACH_PTR(call
->args
, arg
) {
843 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
844 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
846 } END_FOR_EACH_PTR(arg
);
848 } END_FOR_EACH_PTR(cb
);
853 static int get_param(int param
, char **name
, struct symbol
**sym
)
859 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
861 * this is a temporary hack to work around a bug (I think in sparse?)
862 * 2.6.37-rc1:fs/reiserfs/journal.o
863 * If there is a function definition without parameter name found
864 * after a function implementation then it causes a crash.
868 if (arg
->ident
->name
< (char *)100)
871 *name
= arg
->ident
->name
;
876 } END_FOR_EACH_PTR(arg
);
881 static int function_signature_matches(const char *sig
)
885 my_sig
= function_signature();
887 return 1; /* default to matching */
888 if (strcmp(my_sig
, sig
) == 0)
893 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
895 struct select_caller_info_data
*data
= _data
;
902 struct symbol
*sym
= NULL
;
903 struct def_callback
*def_callback
;
905 struct timeval cur_time
;
912 gettimeofday(&cur_time
, NULL
);
913 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
916 func_id
= atoi(argv
[0]);
918 type
= strtol(argv
[1], NULL
, 10);
919 param
= strtol(argv
[2], NULL
, 10);
925 if (data
->prev_func_id
== -1)
926 data
->prev_func_id
= func_id
;
927 if (func_id
!= data
->prev_func_id
) {
928 stree
= __pop_fake_cur_stree();
930 merge_stree(&data
->final_states
, stree
);
932 __push_fake_cur_stree();
934 data
->prev_func_id
= func_id
;
940 if (type
== INTERNAL
&&
941 !function_signature_matches(value
)) {
946 if (param
>= 0 && !get_param(param
, &name
, &sym
))
949 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
950 if (def_callback
->hook_type
== type
)
951 def_callback
->callback(name
, sym
, key
, value
);
952 } END_FOR_EACH_PTR(def_callback
);
957 static struct string_list
*ptr_names_done
;
958 static struct string_list
*ptr_names
;
960 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
962 insert_string(&ptr_names
, alloc_string(argv
[0]));
966 static char *get_next_ptr_name(void)
970 FOR_EACH_PTR(ptr_names
, ptr
) {
971 if (list_has_string(ptr_names_done
, ptr
))
973 insert_string(&ptr_names_done
, ptr
);
975 } END_FOR_EACH_PTR(ptr
);
979 static void get_ptr_names(const char *file
, const char *name
)
981 char sql_filter
[1024];
985 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
988 snprintf(sql_filter
, 1024, "function = '%s';", name
);
991 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
993 run_sql(get_ptr_name
, NULL
,
994 "select distinct ptr from function_ptr where %s",
997 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1001 while ((name
= get_next_ptr_name()))
1002 get_ptr_names(NULL
, name
);
1005 static void match_data_from_db(struct symbol
*sym
)
1007 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1008 struct sm_state
*sm
;
1009 struct stree
*stree
;
1010 struct timeval end_time
;
1012 if (!sym
|| !sym
->ident
)
1015 gettimeofday(&data
.start_time
, NULL
);
1017 __push_fake_cur_stree();
1023 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1024 get_ptr_names(get_base_file(), sym
->ident
->name
);
1026 get_ptr_names(NULL
, sym
->ident
->name
);
1028 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1029 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1030 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1031 stree
= __pop_fake_cur_stree();
1036 sql_select_caller_info(&data
,
1037 "call_id, type, parameter, key, value",
1041 stree
= __pop_fake_cur_stree();
1043 merge_stree(&data
.final_states
, stree
);
1045 __push_fake_cur_stree();
1047 data
.prev_func_id
= -1;
1050 FOR_EACH_PTR(ptr_names
, ptr
) {
1051 run_sql(caller_info_callback
, &data
,
1052 "select call_id, type, parameter, key, value"
1053 " from common_caller_info where function = '%s' order by call_id",
1055 } END_FOR_EACH_PTR(ptr
);
1058 FOR_EACH_PTR(ptr_names
, ptr
) {
1060 } END_FOR_EACH_PTR(ptr
);
1061 goto free_ptr_names
;
1064 FOR_EACH_PTR(ptr_names
, ptr
) {
1065 run_sql(caller_info_callback
, &data
,
1066 "select call_id, type, parameter, key, value"
1067 " from caller_info where function = '%s' order by call_id",
1070 } END_FOR_EACH_PTR(ptr
);
1073 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1074 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1076 sql_select_caller_info(&data
,
1077 "call_id, type, parameter, key, value",
1081 stree
= __pop_fake_cur_stree();
1083 merge_stree(&data
.final_states
, stree
);
1086 gettimeofday(&end_time
, NULL
);
1087 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1088 FOR_EACH_SM(data
.final_states
, sm
) {
1090 } END_FOR_EACH_SM(sm
);
1093 free_stree(&data
.final_states
);
1096 static int return_implies_callbacks(void *_info
, int argc
, char **argv
, char **azColName
)
1098 struct implies_info
*info
= _info
;
1099 struct db_implies_callback
*cb
;
1100 struct expression
*arg
= NULL
;
1107 type
= atoi(argv
[1]);
1108 param
= atoi(argv
[2]);
1110 FOR_EACH_PTR(info
->cb_list
, cb
) {
1111 if (cb
->type
!= type
)
1114 arg
= get_argument_from_call_expr(info
->expr
->args
, param
);
1118 cb
->callback(info
->expr
, arg
, argv
[3], argv
[4]);
1119 } END_FOR_EACH_PTR(cb
);
1124 static int call_implies_callbacks(void *_info
, int argc
, char **argv
, char **azColName
)
1126 struct implies_info
*info
= _info
;
1127 struct db_implies_callback
*cb
;
1128 struct expression
*arg
;
1137 type
= atoi(argv
[1]);
1138 param
= atoi(argv
[2]);
1140 if (!get_param(param
, &name
, &sym
))
1142 arg
= symbol_expression(sym
);
1146 FOR_EACH_PTR(info
->cb_list
, cb
) {
1147 if (cb
->type
!= type
)
1149 cb
->callback(info
->expr
, arg
, argv
[3], argv
[4]);
1150 } END_FOR_EACH_PTR(cb
);
1155 static void match_return_implies(struct expression
*expr
)
1157 struct implies_info info
= {
1158 .type
= RETURN_IMPLIES
,
1159 .cb_list
= return_implies_cb_list
,
1162 if (expr
->fn
->type
!= EXPR_SYMBOL
||
1166 info
.sym
= expr
->fn
->symbol
;
1167 sql_select_implies("function, type, parameter, key, value", &info
,
1168 return_implies_callbacks
);
1171 static void match_call_implies(struct symbol
*sym
)
1173 struct implies_info info
= {
1174 .type
= CALL_IMPLIES
,
1175 .cb_list
= call_implies_cb_list
,
1178 if (!sym
|| !sym
->ident
)
1182 sql_select_implies("function, type, parameter, key, value", &info
,
1183 call_implies_callbacks
);
1186 static void print_initializer_list(struct expression_list
*expr_list
,
1187 struct symbol
*struct_type
)
1189 struct expression
*expr
;
1190 struct symbol
*base_type
;
1191 char struct_name
[256];
1193 FOR_EACH_PTR(expr_list
, expr
) {
1194 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1195 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1198 if (expr
->type
!= EXPR_IDENTIFIER
)
1200 if (!expr
->expr_ident
)
1202 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1204 base_type
= get_type(expr
->ident_expression
);
1205 if (!base_type
|| base_type
->type
!= SYM_FN
)
1207 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1208 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1209 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1211 } END_FOR_EACH_PTR(expr
);
1214 static void global_variable(struct symbol
*sym
)
1216 struct symbol
*struct_type
;
1220 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1222 struct_type
= get_base_type(sym
);
1225 if (struct_type
->type
== SYM_ARRAY
) {
1226 struct_type
= get_base_type(struct_type
);
1230 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1232 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1235 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1237 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1240 static void call_return_state_hooks_conditional(struct expression
*expr
)
1242 struct returned_state_callback
*cb
;
1243 struct range_list
*rl
;
1244 char *return_ranges
;
1245 int final_pass_orig
= final_pass
;
1247 __push_fake_cur_stree();
1250 __split_whole_condition(expr
->conditional
);
1251 final_pass
= final_pass_orig
;
1253 if (get_implied_rl(expr
->cond_true
, &rl
))
1254 rl
= cast_rl(cur_func_return_type(), rl
);
1256 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1257 return_ranges
= show_rl(rl
);
1258 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1261 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1262 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1263 } END_FOR_EACH_PTR(cb
);
1265 __push_true_states();
1266 __use_false_states();
1268 if (get_implied_rl(expr
->cond_false
, &rl
))
1269 rl
= cast_rl(cur_func_return_type(), rl
);
1271 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1272 return_ranges
= show_rl(rl
);
1273 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1276 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1277 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1278 } END_FOR_EACH_PTR(cb
);
1280 __merge_true_states();
1281 __free_fake_cur_stree();
1284 static void call_return_state_hooks_compare(struct expression
*expr
)
1286 struct returned_state_callback
*cb
;
1287 char *return_ranges
;
1288 int final_pass_orig
= final_pass
;
1289 sval_t sval
= { .type
= &int_ctype
};
1292 if (!get_implied_value(expr
, &ret
))
1295 __push_fake_cur_stree();
1298 __split_whole_condition(expr
);
1299 final_pass
= final_pass_orig
;
1301 if (ret
.value
!= 0) {
1302 return_ranges
= alloc_sname("1");
1304 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1307 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1308 cb
->callback(return_id
, return_ranges
, expr
);
1309 } END_FOR_EACH_PTR(cb
);
1312 __push_true_states();
1313 __use_false_states();
1315 if (ret
.value
!= 1) {
1316 return_ranges
= alloc_sname("0");
1318 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1321 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1322 cb
->callback(return_id
, return_ranges
, expr
);
1323 } END_FOR_EACH_PTR(cb
);
1326 __merge_true_states();
1327 __free_fake_cur_stree();
1330 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1332 struct sm_state
*tmp
;
1334 FOR_EACH_PTR(slist
, tmp
) {
1335 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1337 } END_FOR_EACH_PTR(tmp
);
1342 static char *get_return_compare_str(struct expression
*expr
)
1350 compare_str
= expr_lte_to_param(expr
, -1);
1353 param
= get_param_num(expr
);
1357 var
= expr_to_var(expr
);
1360 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1361 comparison
= get_comparison_strings(var
, buf
);
1367 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1368 return alloc_sname(buf
);
1371 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1373 struct returned_state_callback
*cb
;
1374 struct range_list
*rl
;
1375 char *return_ranges
;
1376 struct sm_state
*tmp
;
1378 int nr_possible
, nr_states
;
1379 char *compare_str
= NULL
;
1381 struct state_list
*already_handled
= NULL
;
1383 if (!sm
|| !sm
->merged
)
1386 if (too_many_possible(sm
))
1389 /* bail if it gets too complicated */
1390 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1391 nr_states
= get_db_state_count();
1392 if (nr_states
* nr_possible
>= 2000)
1395 FOR_EACH_PTR(sm
->possible
, tmp
) {
1398 if (ptr_in_list(tmp
, already_handled
))
1400 add_ptr_list(&already_handled
, tmp
);
1403 __push_fake_cur_stree();
1405 overwrite_states_using_pool(sm
, tmp
);
1407 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1408 return_ranges
= show_rl(rl
);
1409 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1410 compare_str
= get_return_compare_str(expr
);
1412 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1413 return_ranges
= alloc_sname(buf
);
1417 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1418 cb
->callback(return_id
, return_ranges
, expr
);
1419 } END_FOR_EACH_PTR(cb
);
1421 __free_fake_cur_stree();
1422 } END_FOR_EACH_PTR(tmp
);
1424 free_slist(&already_handled
);
1429 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1431 struct sm_state
*sm
;
1433 if (!expr
|| expr_equal_to_param(expr
, -1))
1436 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1437 return split_possible_helper(sm
, expr
);
1440 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1442 struct range_list
*rl
;
1443 char *return_ranges
;
1452 return alloc_sname("");
1454 if (get_implied_value(expr
, &sval
)) {
1455 sval
= sval_cast(cur_func_return_type(), sval
);
1456 *rl_p
= alloc_rl(sval
, sval
);
1457 return sval_to_str(sval
);
1460 compare_str
= expr_equal_to_param(expr
, -1);
1461 math_str
= get_value_in_terms_of_parameter_math(expr
);
1463 if (get_implied_rl(expr
, &rl
)) {
1464 rl
= cast_rl(cur_func_return_type(), rl
);
1465 return_ranges
= show_rl(rl
);
1466 } else if (get_imaginary_absolute(expr
, &rl
)){
1467 rl
= cast_rl(cur_func_return_type(), rl
);
1468 return alloc_sname(show_rl(rl
));
1470 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1471 return_ranges
= show_rl(rl
);
1476 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1477 return alloc_sname(buf
);
1480 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1481 return alloc_sname(buf
);
1483 compare_str
= get_return_compare_str(expr
);
1485 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1486 return alloc_sname(buf
);
1489 return return_ranges
;
1492 static bool has_possible_negative(struct sm_state
*sm
)
1494 struct sm_state
*tmp
;
1496 FOR_EACH_PTR(sm
->possible
, tmp
) {
1497 if (!estate_rl(tmp
->state
))
1499 if (sval_is_negative(estate_min(tmp
->state
)) &&
1500 sval_is_negative(estate_max(tmp
->state
)))
1502 } END_FOR_EACH_PTR(tmp
);
1507 static bool has_possible_zero_null(struct sm_state
*sm
)
1509 struct sm_state
*tmp
;
1512 FOR_EACH_PTR(sm
->possible
, tmp
) {
1513 if (!estate_get_single_value(tmp
->state
, &sval
))
1515 if (sval
.value
== 0)
1517 } END_FOR_EACH_PTR(tmp
);
1522 static int split_positive_from_negative(struct expression
*expr
)
1524 struct sm_state
*sm
;
1525 struct returned_state_callback
*cb
;
1526 struct range_list
*rl
;
1527 const char *return_ranges
;
1528 struct range_list
*ret_rl
;
1531 /* We're going to print the states 3 times */
1532 if (get_db_state_count() > 10000 / 3)
1535 if (!get_implied_rl(expr
, &rl
) || !rl
)
1537 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1539 /* Forget about INT_MAX and larger */
1540 if (rl_max(rl
).value
<= 0)
1542 if (!sval_is_negative(rl_min(rl
)))
1545 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1548 if (!has_possible_negative(sm
))
1551 if (!assume(compare_expression(expr
, '>', zero_expr())))
1555 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1556 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1557 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1558 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1559 } END_FOR_EACH_PTR(cb
);
1563 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1564 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1567 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1568 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1569 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1570 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1571 } END_FOR_EACH_PTR(cb
);
1577 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1580 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1581 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1582 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1583 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1584 } END_FOR_EACH_PTR(cb
);
1592 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1594 struct returned_state_callback
*cb
;
1595 struct range_list
*rl
;
1596 struct range_list
*nonnull_rl
;
1598 struct range_list
*null_rl
= NULL
;
1599 char *return_ranges
;
1600 struct sm_state
*sm
;
1601 struct smatch_state
*state
;
1603 int final_pass_orig
= final_pass
;
1605 if (!expr
|| expr_equal_to_param(expr
, -1))
1607 if (expr
->type
== EXPR_CALL
)
1609 if (!is_pointer(expr
))
1612 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1615 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1618 if (!estate_rl(state
))
1620 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1622 if (!has_possible_zero_null(sm
))
1625 nr_states
= get_db_state_count();
1626 if (option_info
&& nr_states
>= 1500)
1629 rl
= estate_rl(state
);
1631 __push_fake_cur_stree();
1634 __split_whole_condition(expr
);
1635 final_pass
= final_pass_orig
;
1637 nonnull_rl
= rl_filter(rl
, rl_zero());
1638 return_ranges
= show_rl(nonnull_rl
);
1639 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1642 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1643 cb
->callback(return_id
, return_ranges
, expr
);
1644 } END_FOR_EACH_PTR(cb
);
1646 __push_true_states();
1647 __use_false_states();
1649 return_ranges
= alloc_sname("0");
1650 null_sval
= sval_type_val(rl_type(rl
), 0);
1651 add_range(&null_rl
, null_sval
, null_sval
);
1652 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1654 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1655 cb
->callback(return_id
, return_ranges
, expr
);
1656 } END_FOR_EACH_PTR(cb
);
1658 __merge_true_states();
1659 __free_fake_cur_stree();
1664 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1666 struct sm_state
*sm
;
1667 struct range_list
*rl
;
1668 struct range_list
*nonzero_rl
;
1670 struct range_list
*zero_rl
= NULL
;
1672 struct returned_state_callback
*cb
;
1673 char *return_ranges
;
1674 int final_pass_orig
= final_pass
;
1676 if (option_project
!= PROJ_KERNEL
)
1679 nr_states
= get_db_state_count();
1680 if (nr_states
> 1500)
1683 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1686 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1689 rl
= estate_rl(sm
->state
);
1693 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1695 if (rl_max(rl
).value
!= 0)
1697 if (!has_possible_zero_null(sm
))
1700 __push_fake_cur_stree();
1703 __split_whole_condition(expr
);
1704 final_pass
= final_pass_orig
;
1706 nonzero_rl
= rl_filter(rl
, rl_zero());
1707 return_ranges
= show_rl(nonzero_rl
);
1708 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1711 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1712 cb
->callback(return_id
, return_ranges
, expr
);
1713 } END_FOR_EACH_PTR(cb
);
1715 __push_true_states();
1716 __use_false_states();
1718 return_ranges
= alloc_sname("0");
1719 zero_sval
= sval_type_val(rl_type(rl
), 0);
1720 add_range(&zero_rl
, zero_sval
, zero_sval
);
1721 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1723 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1724 cb
->callback(return_id
, return_ranges
, expr
);
1725 } END_FOR_EACH_PTR(cb
);
1727 __merge_true_states();
1728 __free_fake_cur_stree();
1733 static int is_boolean(struct expression
*expr
)
1735 struct range_list
*rl
;
1737 if (!get_implied_rl(expr
, &rl
))
1739 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1744 static int is_conditional(struct expression
*expr
)
1748 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1753 static int splitable_function_call(struct expression
*expr
)
1755 struct sm_state
*sm
;
1758 if (!expr
|| expr
->type
!= EXPR_CALL
)
1760 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1761 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1762 return split_possible_helper(sm
, expr
);
1765 static struct sm_state
*find_bool_param(void)
1767 struct stree
*start_states
;
1769 struct sm_state
*sm
, *tmp
;
1772 start_states
= get_start_states();
1774 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1777 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1780 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1781 rl_max(estate_rl(sm
->state
)).value
!= 1)
1784 } END_FOR_EACH_PTR_REVERSE(arg
);
1790 * Check if it's splitable. If not, then splitting it up is likely not
1791 * useful for the callers.
1793 FOR_EACH_PTR(sm
->possible
, tmp
) {
1796 if (!estate_get_single_value(tmp
->state
, &sval
))
1798 } END_FOR_EACH_PTR(tmp
);
1803 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1805 struct returned_state_callback
*cb
;
1806 struct range_list
*ret_rl
;
1807 const char *return_ranges
;
1808 struct sm_state
*tmp
;
1810 int nr_possible
, nr_states
;
1811 char *compare_str
= NULL
;
1813 struct state_list
*already_handled
= NULL
;
1815 if (!sm
|| !sm
->merged
)
1818 if (too_many_possible(sm
))
1821 /* bail if it gets too complicated */
1822 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1823 nr_states
= get_db_state_count();
1824 if (nr_states
* nr_possible
>= 2000)
1827 FOR_EACH_PTR(sm
->possible
, tmp
) {
1830 if (ptr_in_list(tmp
, already_handled
))
1832 add_ptr_list(&already_handled
, tmp
);
1835 __push_fake_cur_stree();
1837 overwrite_states_using_pool(sm
, tmp
);
1839 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1840 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1841 compare_str
= get_return_compare_str(expr
);
1843 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1844 return_ranges
= alloc_sname(buf
);
1848 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1849 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1850 } END_FOR_EACH_PTR(cb
);
1852 __free_fake_cur_stree();
1853 } END_FOR_EACH_PTR(tmp
);
1855 free_slist(&already_handled
);
1860 static int split_by_bool_param(struct expression
*expr
)
1862 struct sm_state
*start_sm
, *sm
;
1865 start_sm
= find_bool_param();
1868 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1869 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1871 return split_on_bool_sm(sm
, expr
);
1874 static int split_by_null_nonnull_param(struct expression
*expr
)
1877 struct sm_state
*sm
;
1879 .type
= &ulong_ctype
,
1882 /* function must only take one pointer */
1883 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1885 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1888 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1891 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1893 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1897 if (!rl_has_sval(estate_rl(sm
->state
), zero
))
1900 return split_on_bool_sm(sm
, expr
);
1903 struct expression
*strip_expr_statement(struct expression
*expr
)
1905 struct expression
*orig
= expr
;
1906 struct statement
*stmt
, *last_stmt
;
1910 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1912 if (expr
->type
!= EXPR_STATEMENT
)
1914 stmt
= expr
->statement
;
1915 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1918 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1919 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1920 last_stmt
= last_stmt
->label_statement
;
1921 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1923 return strip_expr(last_stmt
->expression
);
1926 static void call_return_state_hooks(struct expression
*expr
)
1928 struct returned_state_callback
*cb
;
1929 struct range_list
*ret_rl
;
1930 const char *return_ranges
;
1934 if (__path_is_null())
1937 expr
= strip_expr(expr
);
1938 expr
= strip_expr_statement(expr
);
1940 if (is_impossible_path())
1943 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1944 !get_implied_value(expr
, &sval
)) &&
1945 (is_condition(expr
) || is_boolean(expr
))) {
1946 call_return_state_hooks_compare(expr
);
1948 } else if (is_conditional(expr
)) {
1949 call_return_state_hooks_conditional(expr
);
1951 } else if (call_return_state_hooks_split_possible(expr
)) {
1953 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1955 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1957 } else if (splitable_function_call(expr
)) {
1959 } else if (split_positive_from_negative(expr
)) {
1961 } else if (split_by_bool_param(expr
)) {
1962 } else if (split_by_null_nonnull_param(expr
)) {
1967 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1968 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1971 nr_states
= get_db_state_count();
1972 if (nr_states
>= 10000) {
1973 match_return_info(return_id
, (char *)return_ranges
, expr
);
1974 mark_all_params_untracked(return_id
, (char *)return_ranges
, expr
);
1977 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1978 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1979 } END_FOR_EACH_PTR(cb
);
1982 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1984 struct returned_member_callback
*cb
;
1985 struct stree
*stree
;
1986 struct sm_state
*sm
;
1987 struct symbol
*type
;
1989 char member_name
[256];
1992 type
= get_type(expr
);
1993 if (!type
|| type
->type
!= SYM_PTR
)
1995 name
= expr_to_var(expr
);
1999 member_name
[sizeof(member_name
) - 1] = '\0';
2000 strcpy(member_name
, "$");
2003 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
2004 stree
= __get_cur_stree();
2005 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
2006 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
2007 strcpy(member_name
, "*$");
2008 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
2011 if (strncmp(sm
->name
, name
, len
) != 0)
2013 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
2015 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
2016 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
2017 } END_FOR_EACH_SM(sm
);
2018 } END_FOR_EACH_PTR(cb
);
2023 static void reset_memdb(struct symbol
*sym
)
2025 mem_sql(NULL
, NULL
, "delete from caller_info;");
2026 mem_sql(NULL
, NULL
, "delete from return_states;");
2027 mem_sql(NULL
, NULL
, "delete from call_implies;");
2028 mem_sql(NULL
, NULL
, "delete from return_implies;");
2031 static void match_end_func_info(struct symbol
*sym
)
2033 if (__path_is_null())
2035 call_return_state_hooks(NULL
);
2038 static void match_after_func(struct symbol
*sym
)
2044 static void init_memdb(void)
2048 const char *schema_files
[] = {
2050 "db/caller_info.schema",
2051 "db/return_states.schema",
2052 "db/function_type_size.schema",
2053 "db/type_size.schema",
2054 "db/call_implies.schema",
2055 "db/return_implies.schema",
2056 "db/function_ptr.schema",
2057 "db/local_values.schema",
2058 "db/function_type_value.schema",
2059 "db/type_value.schema",
2060 "db/function_type.schema",
2061 "db/data_info.schema",
2062 "db/parameter_name.schema",
2063 "db/constraints.schema",
2064 "db/constraints_required.schema",
2065 "db/fn_ptr_data_link.schema",
2066 "db/fn_data_link.schema",
2067 "db/mtag_about.schema",
2068 "db/mtag_map.schema",
2069 "db/mtag_data.schema",
2070 "db/mtag_alias.schema",
2072 static char buf
[4096];
2077 rc
= sqlite3_open(":memory:", &mem_db
);
2078 if (rc
!= SQLITE_OK
) {
2079 printf("Error starting In-Memory database.");
2083 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2084 fd
= open_data_file(schema_files
[i
]);
2086 printf("failed to open: %s\n", schema_files
[i
]);
2089 ret
= read(fd
, buf
, sizeof(buf
));
2091 printf("failed to read: %s\n", schema_files
[i
]);
2095 if (ret
== sizeof(buf
)) {
2096 printf("Schema file too large: %s (limit %zd bytes)",
2097 schema_files
[i
], sizeof(buf
));
2101 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
2102 if (rc
!= SQLITE_OK
) {
2103 fprintf(stderr
, "SQL error #2: %s\n", err
);
2104 fprintf(stderr
, "%s\n", buf
);
2109 static void init_cachedb(void)
2113 const char *schema_files
[] = {
2114 "db/call_implies.schema",
2115 "db/return_implies.schema",
2116 "db/type_info.schema",
2118 static char buf
[4096];
2123 rc
= sqlite3_open(":memory:", &cache_db
);
2124 if (rc
!= SQLITE_OK
) {
2125 printf("Error starting In-Memory database.");
2129 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2130 fd
= open_data_file(schema_files
[i
]);
2132 printf("failed to open: %s\n", schema_files
[i
]);
2135 ret
= read(fd
, buf
, sizeof(buf
));
2137 printf("failed to read: %s\n", schema_files
[i
]);
2141 if (ret
== sizeof(buf
)) {
2142 printf("Schema file too large: %s (limit %zd bytes)",
2143 schema_files
[i
], sizeof(buf
));
2147 rc
= sqlite3_exec(cache_db
, buf
, NULL
, NULL
, &err
);
2148 if (rc
!= SQLITE_OK
) {
2149 fprintf(stderr
, "SQL error #2: %s\n", err
);
2150 fprintf(stderr
, "%s\n", buf
);
2155 static int save_cache_data(void *_table
, int argc
, char **argv
, char **azColName
)
2157 static char buf
[4096];
2159 char *table
= _table
;
2163 p
+= snprintf(p
, 4096 - (p
- buf
), "insert or ignore into %s values (", table
);
2164 for (i
= 0; i
< argc
; i
++) {
2166 p
+= snprintf(p
, 4096 - (p
- buf
), ", ");
2167 p
+= snprintf(p
, 4096 - (p
- buf
), "'%s'", argv
[i
]);
2170 p
+= snprintf(p
, 4096 - (p
- buf
), ");");
2174 sm_msg("SQL: %s", buf
);
2178 static void dump_cache(struct symbol_list
*sym_list
)
2182 cache_sql(&save_cache_data
, (char *)"type_info", "select * from type_info;");
2183 cache_sql(&save_cache_data
, (char *)"return_implies", "select * from return_implies;");
2184 cache_sql(&save_cache_data
, (char *)"call_implies", "select * from call_implies;");
2187 void open_smatch_db(void)
2194 use_states
= malloc(num_checks
+ 1);
2195 memset(use_states
, 0xff, num_checks
+ 1);
2200 rc
= sqlite3_open_v2("smatch_db.sqlite", &smatch_db
, SQLITE_OPEN_READONLY
, NULL
);
2201 if (rc
!= SQLITE_OK
) {
2206 "PRAGMA cache_size = %d;", SQLITE_CACHE_PAGES
);
2210 static void register_common_funcs(void)
2212 struct token
*token
;
2216 if (option_project
== PROJ_NONE
)
2217 strcpy(filename
, "common_functions");
2219 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2221 token
= get_tokens_file(filename
);
2224 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2226 token
= token
->next
;
2227 while (token_type(token
) != TOKEN_STREAMEND
) {
2228 if (token_type(token
) != TOKEN_IDENT
)
2230 func
= alloc_string(show_ident(token
->ident
));
2231 add_ptr_list(&common_funcs
, func
);
2232 token
= token
->next
;
2234 clear_token_alloc();
2237 static char *get_next_string(char **str
)
2239 static char string
[256];
2248 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2253 memcpy(string
, start
, 255);
2255 printf("return_fix: '%s' too long", string
);
2259 memcpy(string
, start
, len
);
2267 static void register_return_replacements(void)
2269 char *func
, *orig
, *new;
2275 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2276 fd
= open_data_file(filename
);
2279 ret
= read(fd
, buf
, sizeof(buf
));
2283 if (ret
== sizeof(buf
)) {
2284 printf("file too large: %s (limit %zd bytes)",
2285 filename
, sizeof(buf
));
2292 get_next_string(&p
);
2295 if (replace_count
== 0 || replace_count
% 3 != 0) {
2299 replace_table
= malloc(replace_count
* sizeof(char *));
2304 func
= alloc_string(get_next_string(&p
));
2305 orig
= alloc_string(get_next_string(&p
));
2306 new = alloc_string(get_next_string(&p
));
2308 replace_table
[i
++] = func
;
2309 replace_table
[i
++] = orig
;
2310 replace_table
[i
++] = new;
2314 void register_definition_db_callbacks(int id
)
2316 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2317 add_hook(&global_variable
, BASE_HOOK
);
2318 add_hook(&global_variable
, DECLARATION_HOOK
);
2319 add_split_return_callback(match_return_info
);
2320 add_split_return_callback(print_returned_struct_members
);
2321 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2322 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2323 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2325 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2326 add_hook(&match_call_implies
, FUNC_DEF_HOOK
);
2327 add_hook(&match_return_implies
, CALL_HOOK_AFTER_INLINE
);
2329 register_common_funcs();
2330 register_return_replacements();
2332 add_hook(&dump_cache
, END_FILE_HOOK
);
2335 void register_db_call_marker(int id
)
2337 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2340 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2342 struct expression
*arg
;
2344 char member_name
[256];
2349 const char *star
= "";
2351 if (expr
->type
!= EXPR_ASSIGNMENT
)
2353 name
= expr_to_var_sym(expr
->left
, sym
);
2356 if (key
[0] == '*') {
2360 if (strncmp(key
, "$", 1) != 0)
2362 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2364 return alloc_string(member_name
);
2367 while (expr
->type
== EXPR_ASSIGNMENT
)
2368 expr
= strip_expr(expr
->right
);
2369 if (expr
->type
!= EXPR_CALL
)
2372 arg
= get_argument_from_call_expr(expr
->args
, param
);
2376 return get_variable_from_key(arg
, key
, sym
);
2379 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2387 arg
= strip_expr(arg
);
2389 if (strcmp(key
, "$") == 0)
2390 return expr_to_var_sym(arg
, sym
);
2392 if (strcmp(key
, "*$") == 0) {
2393 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2394 arg
= strip_expr(arg
->unop
);
2395 return expr_to_var_sym(arg
, sym
);
2397 tmp
= expr_to_var_sym(arg
, sym
);
2400 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2402 return alloc_string(buf
);
2406 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2407 arg
= strip_expr(arg
->unop
);
2408 tmp
= expr_to_var_sym(arg
, sym
);
2411 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2412 return alloc_string(buf
);
2415 tmp
= expr_to_var_sym(arg
, sym
);
2418 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2420 return alloc_string(buf
);
2423 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2427 if (strcmp("$", key
) == 0)
2428 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2429 return get_variable_from_key(arg
, key
, sym
);
2432 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2435 static char buf
[256];
2437 name_len
= strlen(param_name
);
2439 if (strcmp(state_name
, param_name
) == 0) {
2441 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2442 strncmp(state_name
, param_name
, name_len
) == 0) {
2443 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2445 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2451 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2453 if (!sym
|| !sym
->ident
)
2456 return state_name_to_param_name(name
, sym
->ident
->name
);
2459 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2461 struct symbol
*type
;
2462 const char *sym_name
;
2464 static char buf
[256];
2467 * mtag_name is different from param_name because mtags can be a struct
2468 * instead of a struct pointer. But we want to treat it like a pointer
2469 * because really an mtag is a pointer. Or in other words, if you pass
2470 * a struct foo then you want to talk about foo.bar but with an mtag
2471 * you want to refer to it as foo->bar.
2475 if (!sym
|| !sym
->ident
)
2478 type
= get_real_base_type(sym
);
2479 if (type
&& type
->type
== SYM_BASETYPE
)
2482 sym_name
= sym
->ident
->name
;
2483 name_len
= strlen(sym_name
);
2485 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2486 strncmp(state_name
, sym_name
, name_len
) == 0) {
2487 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2491 return state_name_to_param_name(state_name
, sym_name
);
2494 const char *get_mtag_name_expr(struct expression
*expr
)
2498 const char *ret
= NULL
;
2500 name
= expr_to_var_sym(expr
, &sym
);
2504 ret
= get_mtag_name_var_sym(name
, sym
);
2510 const char *get_param_name(struct sm_state
*sm
)
2512 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2515 char *get_data_info_name(struct expression
*expr
)
2522 expr
= strip_expr(expr
);
2523 name
= get_member_name(expr
);
2526 name
= expr_to_var_sym(expr
, &sym
);
2529 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2531 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2532 snprintf(buf
, sizeof(buf
), "static %s", name
);
2534 snprintf(buf
, sizeof(buf
), "global %s", name
);
2535 ret
= alloc_sname(buf
);