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
24 #include "smatch_slist.h"
25 #include "smatch_extra.h"
28 static sqlite3
*mem_db
;
32 #define sql_insert_helper(table, ignore, late, values...) \
36 char *err, *p = buf; \
42 p += snprintf(p, buf + sizeof(buf) - p, \
43 "insert %sinto %s values (", \
44 ignore ? "or ignore " : "", #table); \
45 p += snprintf(p, buf + sizeof(buf) - p, values); \
46 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
47 sm_debug("in-mem: %s\n", buf); \
48 rc = sqlite3_exec(mem_db, buf, NULL, NULL, &err); \
49 if (rc != SQLITE_OK) { \
50 fprintf(stderr, "SQL error #2: %s\n", err); \
51 fprintf(stderr, "SQL: '%s'\n", buf); \
57 FILE *tmp_fd = sm_outfd; \
58 sm_outfd = sql_outfd; \
60 sm_printf("SQL%s: insert %sinto " #table " values(", \
61 late ? "_late" : "", ignore ? "or ignore " : ""); \
68 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, values);
69 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 1, 0, values);
70 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 1, values);
74 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
76 ALLOCATOR(def_callback
, "definition db hook callbacks");
77 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
78 static struct callback_list
*select_caller_info_callbacks
;
80 struct member_info_callback
{
82 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
84 ALLOCATOR(member_info_callback
, "caller_info callbacks");
85 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
86 static struct member_info_cb_list
*member_callbacks
;
88 struct returned_state_callback
{
89 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
91 ALLOCATOR(returned_state_callback
, "returned state callbacks");
92 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
93 static struct returned_state_cb_list
*returned_state_callbacks
;
95 struct returned_member_callback
{
97 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
99 ALLOCATOR(returned_member_callback
, "returned member callbacks");
100 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
101 static struct returned_member_cb_list
*returned_member_callbacks
;
103 struct call_implies_callback
{
105 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
107 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
108 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
109 static struct call_implies_cb_list
*call_implies_cb_list
;
111 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
115 for (i
= 0; i
< argc
; i
++) {
118 sm_printf("%s", argv
[i
]);
124 void debug_sql(const char *sql
)
129 sql_exec(print_sql_output
, NULL
, sql
);
132 void debug_mem_sql(const char *sql
)
137 sql_mem_exec(print_sql_output
, NULL
, sql
);
140 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
145 if (option_no_db
|| !db
)
148 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
149 if (rc
!= SQLITE_OK
&& !parse_error
) {
150 fprintf(stderr
, "SQL error #2: %s\n", err
);
151 fprintf(stderr
, "SQL: '%s'\n", sql
);
156 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
164 rc
= sqlite3_exec(mem_db
, sql
, callback
, data
, &err
);
165 if (rc
!= SQLITE_OK
) {
166 fprintf(stderr
, "SQL error #2: %s\n", err
);
167 fprintf(stderr
, "SQL: '%s'\n", sql
);
172 static int replace_count
;
173 static char **replace_table
;
174 static const char *replace_return_ranges(const char *return_ranges
)
178 if (!get_function()) {
179 /* I have no idea why EXPORT_SYMBOL() is here */
180 return return_ranges
;
182 for (i
= 0; i
< replace_count
; i
+= 3) {
183 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
184 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
185 return replace_table
[i
+ 2];
188 return return_ranges
;
192 static char *use_states
;
193 static int get_db_state_count(void)
198 FOR_EACH_SM(__get_cur_stree(), sm
) {
199 if (sm
->owner
>= 0 && use_states
[sm
->owner
])
201 } END_FOR_EACH_SM(sm
);
205 void db_ignore_states(int id
)
210 void sql_insert_return_states(int return_id
, const char *return_ranges
,
211 int type
, int param
, const char *key
, const char *value
)
213 if (key
&& strlen(key
) >= 80)
215 return_ranges
= replace_return_ranges(return_ranges
);
216 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
217 get_base_file(), get_function(), (unsigned long)__inline_fn
,
218 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
221 static struct string_list
*common_funcs
;
222 static int is_common_function(const char *fn
)
229 if (strncmp(fn
, "__builtin_", 10) == 0)
232 FOR_EACH_PTR(common_funcs
, tmp
) {
233 if (strcmp(tmp
, fn
) == 0)
235 } END_FOR_EACH_PTR(tmp
);
240 static char *function_signature(void)
242 return type_to_str(get_real_base_type(cur_func_sym
));
245 void sql_insert_caller_info(struct expression
*call
, int type
,
246 int param
, const char *key
, const char *value
)
248 FILE *tmp_fd
= sm_outfd
;
251 if (!option_info
&& !__inline_call
)
254 if (key
&& strlen(key
) >= 80)
257 fn
= get_fnptr_name(call
->fn
);
263 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
264 get_base_file(), get_function(), fn
, (unsigned long)call
,
265 is_static(call
->fn
), type
, param
, key
, value
);
271 if (strncmp(fn
, "__builtin_", 10) == 0)
273 if (type
!= INTERNAL
&& is_common_function(fn
))
276 sm_outfd
= caller_info_fd
;
277 sm_msg("SQL_caller_info: insert into caller_info values ("
278 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
279 get_base_file(), get_function(), fn
, is_static(call
->fn
),
280 type
, param
, key
, value
);
286 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
288 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
292 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
294 sql_insert(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'", get_base_file(),
295 get_function(), (unsigned long)__inline_fn
, fn_static(),
296 type
, param
, key
, value
);
299 void sql_insert_function_type_size(const char *member
, const char *ranges
)
301 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
304 void sql_insert_local_values(const char *name
, const char *value
)
306 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
309 void sql_insert_function_type_value(const char *type
, const char *value
)
311 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
314 void sql_insert_function_type(int param
, const char *value
)
316 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
317 get_base_file(), get_function(), fn_static(), param
, value
);
320 void sql_insert_parameter_name(int param
, const char *value
)
322 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
323 get_base_file(), get_function(), fn_static(), param
, value
);
326 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
330 data_name
= get_data_info_name(data
);
333 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
334 is_static(data
) ? get_base_file() : "extern",
335 data_name
, type
, value
);
338 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
340 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
341 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
345 void sql_save_constraint(const char *con
)
350 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
353 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
355 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
358 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
363 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
364 "select constraints_required.data, constraints_required.op, '%s' from "
365 "constraints_required where bound = '%s';", new_limit
, old_limit
);
368 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
370 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
373 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
375 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
378 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
379 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
380 fn
->symbol
->ident
->name
,
381 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
382 type
, param
, key
, value
);
385 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
387 sql_insert(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
388 tag
, get_filename(), get_function(), get_lineno(), left_name
, right_name
);
391 void sql_insert_mtag_data(mtag_t tag
, const char *var
, int offset
, int type
, const char *value
)
393 sql_insert(mtag_data
, "%lld, '%s', %d, %d, '%s'", tag
, var
, offset
, type
, value
);
396 void sql_insert_mtag_map(mtag_t tag
, int offset
, mtag_t container
)
398 sql_insert(mtag_map
, "%lld, %d, %lld", tag
, offset
, container
);
401 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
403 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
406 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
408 mtag_t
*saved_tag
= _tag
;
411 new_tag
= strtoll(argv
[0], NULL
, 10);
414 *saved_tag
= new_tag
;
415 else if (*saved_tag
!= new_tag
)
421 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
)
425 run_sql(save_mtag
, &tmp
,
426 "select container from mtag_map where tag = %lld and offset = %d;",
429 if (tmp
== 0 || tmp
== -1ULL)
435 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
439 run_sql(save_mtag
, &tmp
,
440 "select tag from mtag_map where container = %lld and offset = %d;",
443 if (tmp
== 0 || tmp
== -1ULL)
449 char *get_static_filter(struct symbol
*sym
)
451 static char sql_filter
[1024];
453 /* This can only happen on buggy code. Return invalid SQL. */
455 sql_filter
[0] = '\0';
459 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
460 snprintf(sql_filter
, sizeof(sql_filter
),
461 "file = '%s' and function = '%s' and static = '1'",
462 get_base_file(), sym
->ident
->name
);
464 snprintf(sql_filter
, sizeof(sql_filter
),
465 "function = '%s' and static = '0'", sym
->ident
->name
);
471 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
473 int *row_count
= _row_count
;
478 *row_count
= atoi(argv
[0]);
482 static void mark_call_params_untracked(struct expression
*call
)
484 struct expression
*arg
;
487 FOR_EACH_PTR(call
->args
, arg
) {
488 mark_untracked(call
, i
++, "$", NULL
);
489 } END_FOR_EACH_PTR(arg
);
492 static void sql_select_return_states_pointer(const char *cols
,
493 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
496 int return_count
= 0;
498 ptr
= get_fnptr_name(call
->fn
);
502 run_sql(get_row_count
, &return_count
,
503 "select count(*) from return_states join function_ptr "
504 "where return_states.function == function_ptr.function and "
505 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
506 /* The magic number 100 is just from testing on the kernel. */
507 if (return_count
> 100) {
508 mark_call_params_untracked(call
);
512 run_sql(callback
, info
,
513 "select %s from return_states join function_ptr where "
514 "return_states.function == function_ptr.function and ptr = '%s' "
515 "and searchable = 1 "
516 "order by function_ptr.file, return_states.file, return_id, type;",
520 static int is_local_symbol(struct expression
*expr
)
522 if (expr
->type
!= EXPR_SYMBOL
)
524 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
529 void sql_select_return_states(const char *cols
, struct expression
*call
,
530 int (*callback
)(void*, int, char**, char**), void *info
)
534 if (is_fake_call(call
))
537 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
538 sql_select_return_states_pointer(cols
, call
, callback
, info
);
542 if (inlinable(call
->fn
)) {
543 mem_sql(callback
, info
,
544 "select %s from return_states where call_id = '%lu' order by return_id, type;",
545 cols
, (unsigned long)call
);
549 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
550 get_static_filter(call
->fn
->symbol
));
551 if (row_count
> 3000)
554 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
555 cols
, get_static_filter(call
->fn
->symbol
));
558 void sql_select_call_implies(const char *cols
, struct expression
*call
,
559 int (*callback
)(void*, int, char**, char**))
561 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
564 if (inlinable(call
->fn
)) {
565 mem_sql(callback
, call
,
566 "select %s from call_implies where call_id = '%lu';",
567 cols
, (unsigned long)call
);
571 run_sql(callback
, call
, "select %s from call_implies where %s;",
572 cols
, get_static_filter(call
->fn
->symbol
));
575 struct select_caller_info_data
{
576 struct stree
*final_states
;
577 struct timeval start_time
;
583 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
585 static void sql_select_caller_info(struct select_caller_info_data
*data
,
586 const char *cols
, struct symbol
*sym
)
589 mem_sql(caller_info_callback
, data
,
590 "select %s from caller_info where call_id = %lu;",
591 cols
, (unsigned long)__inline_fn
);
595 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
597 run_sql(caller_info_callback
, data
,
598 "select %s from common_caller_info where %s order by call_id;",
599 cols
, get_static_filter(sym
));
603 run_sql(caller_info_callback
, data
,
604 "select %s from caller_info where %s order by call_id;",
605 cols
, get_static_filter(sym
));
608 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
610 struct def_callback
*def_callback
= __alloc_def_callback(0);
612 def_callback
->hook_type
= type
;
613 def_callback
->callback
= callback
;
614 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
618 * These call backs are used when the --info option is turned on to print struct
619 * member information. For example foo->bar could have a state in
620 * smatch_extra.c and also check_user.c.
622 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
624 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
626 member_callback
->owner
= owner
;
627 member_callback
->callback
= callback
;
628 add_ptr_list(&member_callbacks
, member_callback
);
631 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
633 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
635 callback
->callback
= fn
;
636 add_ptr_list(&returned_state_callbacks
, callback
);
639 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
))
641 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
643 member_callback
->owner
= owner
;
644 member_callback
->callback
= callback
;
645 add_ptr_list(&returned_member_callbacks
, member_callback
);
648 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
650 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
653 cb
->callback
= callback
;
654 add_ptr_list(&call_implies_cb_list
, cb
);
658 struct expression
*static_returns_call
;
659 struct symbol
*return_type
;
660 struct range_list
*return_range_list
;
663 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
665 struct return_info
*ret_info
= _ret_info
;
666 struct range_list
*rl
;
667 struct expression
*call_expr
= ret_info
->static_returns_call
;
671 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
672 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
676 struct range_list
*db_return_vals(struct expression
*expr
)
678 struct return_info ret_info
= {};
682 if (is_fake_call(expr
))
685 snprintf(buf
, sizeof(buf
), "return %p", expr
);
686 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
688 return clone_rl(estate_rl(sm
->state
));
689 ret_info
.static_returns_call
= expr
;
690 ret_info
.return_type
= get_type(expr
);
691 if (!ret_info
.return_type
)
694 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
697 ret_info
.return_range_list
= NULL
;
698 if (inlinable(expr
->fn
)) {
699 mem_sql(db_return_callback
, &ret_info
,
700 "select distinct return from return_states where call_id = '%lu';",
701 (unsigned long)expr
);
703 run_sql(db_return_callback
, &ret_info
,
704 "select distinct return from return_states where %s;",
705 get_static_filter(expr
->fn
->symbol
));
707 return ret_info
.return_range_list
;
710 struct range_list
*db_return_vals_from_str(const char *fn_name
)
712 struct return_info ret_info
;
714 ret_info
.static_returns_call
= NULL
;
715 ret_info
.return_type
= &llong_ctype
;
716 ret_info
.return_range_list
= NULL
;
718 run_sql(db_return_callback
, &ret_info
,
719 "select distinct return from return_states where function = '%s';",
721 return ret_info
.return_range_list
;
724 static void match_call_marker(struct expression
*expr
)
728 type
= get_type(expr
->fn
);
729 if (type
&& type
->type
== SYM_PTR
)
730 type
= get_real_base_type(type
);
733 * we just want to record something in the database so that if we have
734 * two calls like: frob(4); frob(some_unkown); then on the receiving
735 * side we know that sometimes frob is called with unknown parameters.
738 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
741 static char *show_offset(int offset
)
747 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
751 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
752 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
758 char printed_name
[256];
761 expr
= strip_expr(expr
);
764 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
765 expr
= strip_expr(expr
->unop
);
769 name
= expr_to_var_sym(expr
, &sym
);
774 FOR_EACH_SM(stree
, sm
) {
777 if (strcmp(name
, sm
->name
) == 0) {
779 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
780 else /* these are already handled. fixme: handle them here */
782 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
783 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
784 } else if (strncmp(name
, sm
->name
, len
) == 0) {
785 if (isalnum(sm
->name
[len
]))
788 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
790 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
794 callback(call
, param
, printed_name
, sm
);
795 } END_FOR_EACH_SM(sm
);
800 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
802 char **container
= _container
;
803 static char buf
[256];
805 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
810 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
811 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
813 struct expression
*tmp
;
814 char *container
= NULL
;
819 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
)
823 * We can't use the in-mem DB because we have to parse the function
824 * first, then we know if it takes a container, then we know to pass it
825 * the container data.
828 run_sql(¶m_used_callback
, &container
,
829 "select key from call_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
830 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
834 p
= strchr(container
, '-');
843 tmp
= get_assigned_expr(expr
);
847 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
849 expr
= strip_expr(expr
->unop
);
850 holder_offset
= get_member_offset_from_deref(expr
);
851 if (-holder_offset
!= offset
)
854 expr
= strip_expr(expr
->deref
);
855 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
856 expr
= strip_expr(expr
->unop
);
858 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
861 static void match_call_info(struct expression
*call
)
863 struct member_info_callback
*cb
;
864 struct expression
*arg
;
869 name
= get_fnptr_name(call
->fn
);
873 FOR_EACH_PTR(member_callbacks
, cb
) {
874 stree
= get_all_states_stree(cb
->owner
);
876 FOR_EACH_PTR(call
->args
, arg
) {
877 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
878 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
880 } END_FOR_EACH_PTR(arg
);
882 } END_FOR_EACH_PTR(cb
);
887 static int get_param(int param
, char **name
, struct symbol
**sym
)
893 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
895 * this is a temporary hack to work around a bug (I think in sparse?)
896 * 2.6.37-rc1:fs/reiserfs/journal.o
897 * If there is a function definition without parameter name found
898 * after a function implementation then it causes a crash.
902 if (arg
->ident
->name
< (char *)100)
905 *name
= arg
->ident
->name
;
910 } END_FOR_EACH_PTR(arg
);
915 static int function_signature_matches(const char *sig
)
919 my_sig
= function_signature();
921 return 1; /* default to matching */
922 if (strcmp(my_sig
, sig
) == 0)
927 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
929 struct select_caller_info_data
*data
= _data
;
936 struct symbol
*sym
= NULL
;
937 struct def_callback
*def_callback
;
939 struct timeval cur_time
;
946 gettimeofday(&cur_time
, NULL
);
947 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
950 func_id
= atoi(argv
[0]);
952 type
= strtol(argv
[1], NULL
, 10);
953 param
= strtol(argv
[2], NULL
, 10);
959 if (data
->prev_func_id
== -1)
960 data
->prev_func_id
= func_id
;
961 if (func_id
!= data
->prev_func_id
) {
962 stree
= __pop_fake_cur_stree();
964 merge_stree(&data
->final_states
, stree
);
966 __push_fake_cur_stree();
968 data
->prev_func_id
= func_id
;
974 if (type
== INTERNAL
&&
975 !function_signature_matches(value
)) {
980 if (param
>= 0 && !get_param(param
, &name
, &sym
))
983 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
984 if (def_callback
->hook_type
== type
)
985 def_callback
->callback(name
, sym
, key
, value
);
986 } END_FOR_EACH_PTR(def_callback
);
991 static struct string_list
*ptr_names_done
;
992 static struct string_list
*ptr_names
;
994 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
996 insert_string(&ptr_names
, alloc_string(argv
[0]));
1000 static char *get_next_ptr_name(void)
1004 FOR_EACH_PTR(ptr_names
, ptr
) {
1005 if (list_has_string(ptr_names_done
, ptr
))
1007 insert_string(&ptr_names_done
, ptr
);
1009 } END_FOR_EACH_PTR(ptr
);
1013 static void get_ptr_names(const char *file
, const char *name
)
1015 char sql_filter
[1024];
1019 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
1022 snprintf(sql_filter
, 1024, "function = '%s';", name
);
1025 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
1027 run_sql(get_ptr_name
, NULL
,
1028 "select distinct ptr from function_ptr where %s",
1031 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1032 if (before
== after
)
1035 while ((name
= get_next_ptr_name()))
1036 get_ptr_names(NULL
, name
);
1039 static void match_data_from_db(struct symbol
*sym
)
1041 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1042 struct sm_state
*sm
;
1043 struct stree
*stree
;
1044 struct timeval end_time
;
1046 if (!sym
|| !sym
->ident
)
1049 gettimeofday(&data
.start_time
, NULL
);
1051 __push_fake_cur_stree();
1057 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1058 get_ptr_names(get_base_file(), sym
->ident
->name
);
1060 get_ptr_names(NULL
, sym
->ident
->name
);
1062 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1063 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1064 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1065 stree
= __pop_fake_cur_stree();
1070 sql_select_caller_info(&data
,
1071 "call_id, type, parameter, key, value",
1075 stree
= __pop_fake_cur_stree();
1077 merge_stree(&data
.final_states
, stree
);
1079 __push_fake_cur_stree();
1081 data
.prev_func_id
= -1;
1084 FOR_EACH_PTR(ptr_names
, ptr
) {
1085 run_sql(caller_info_callback
, &data
,
1086 "select call_id, type, parameter, key, value"
1087 " from common_caller_info where function = '%s' order by call_id",
1089 } END_FOR_EACH_PTR(ptr
);
1092 FOR_EACH_PTR(ptr_names
, ptr
) {
1094 } END_FOR_EACH_PTR(ptr
);
1095 goto free_ptr_names
;
1098 FOR_EACH_PTR(ptr_names
, ptr
) {
1099 run_sql(caller_info_callback
, &data
,
1100 "select call_id, type, parameter, key, value"
1101 " from caller_info where function = '%s' order by call_id",
1104 } END_FOR_EACH_PTR(ptr
);
1107 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1108 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1110 sql_select_caller_info(&data
,
1111 "call_id, type, parameter, key, value",
1115 stree
= __pop_fake_cur_stree();
1117 merge_stree(&data
.final_states
, stree
);
1120 gettimeofday(&end_time
, NULL
);
1121 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1122 FOR_EACH_SM(data
.final_states
, sm
) {
1124 } END_FOR_EACH_SM(sm
);
1127 free_stree(&data
.final_states
);
1130 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1132 struct expression
*call_expr
= _call
;
1133 struct call_implies_callback
*cb
;
1134 struct expression
*arg
= NULL
;
1141 type
= atoi(argv
[1]);
1142 param
= atoi(argv
[2]);
1144 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
1145 if (cb
->type
!= type
)
1148 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1152 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1153 } END_FOR_EACH_PTR(cb
);
1158 static void match_call_implies(struct expression
*expr
)
1160 sql_select_call_implies("function, type, parameter, key, value", expr
,
1161 call_implies_callbacks
);
1164 static void print_initializer_list(struct expression_list
*expr_list
,
1165 struct symbol
*struct_type
)
1167 struct expression
*expr
;
1168 struct symbol
*base_type
;
1169 char struct_name
[256];
1171 FOR_EACH_PTR(expr_list
, expr
) {
1172 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1173 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1176 if (expr
->type
!= EXPR_IDENTIFIER
)
1178 if (!expr
->expr_ident
)
1180 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1182 base_type
= get_type(expr
->ident_expression
);
1183 if (!base_type
|| base_type
->type
!= SYM_FN
)
1185 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1186 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1187 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1189 } END_FOR_EACH_PTR(expr
);
1192 static void global_variable(struct symbol
*sym
)
1194 struct symbol
*struct_type
;
1198 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1200 struct_type
= get_base_type(sym
);
1203 if (struct_type
->type
== SYM_ARRAY
) {
1204 struct_type
= get_base_type(struct_type
);
1208 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1210 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1213 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1215 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1218 static void call_return_state_hooks_conditional(struct expression
*expr
)
1220 struct returned_state_callback
*cb
;
1221 struct range_list
*rl
;
1222 char *return_ranges
;
1223 int final_pass_orig
= final_pass
;
1225 __push_fake_cur_stree();
1228 __split_whole_condition(expr
->conditional
);
1229 final_pass
= final_pass_orig
;
1231 if (get_implied_rl(expr
->cond_true
, &rl
))
1232 rl
= cast_rl(cur_func_return_type(), rl
);
1234 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1235 return_ranges
= show_rl(rl
);
1236 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1239 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1240 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1241 } END_FOR_EACH_PTR(cb
);
1243 __push_true_states();
1244 __use_false_states();
1246 if (get_implied_rl(expr
->cond_false
, &rl
))
1247 rl
= cast_rl(cur_func_return_type(), rl
);
1249 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1250 return_ranges
= show_rl(rl
);
1251 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1254 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1255 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1256 } END_FOR_EACH_PTR(cb
);
1258 __merge_true_states();
1259 __free_fake_cur_stree();
1262 static void call_return_state_hooks_compare(struct expression
*expr
)
1264 struct returned_state_callback
*cb
;
1265 char *return_ranges
;
1266 int final_pass_orig
= final_pass
;
1267 sval_t sval
= { .type
= &int_ctype
};
1270 if (!get_implied_value(expr
, &ret
))
1273 __push_fake_cur_stree();
1276 __split_whole_condition(expr
);
1277 final_pass
= final_pass_orig
;
1279 if (ret
.value
!= 0) {
1280 return_ranges
= alloc_sname("1");
1282 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1285 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1286 cb
->callback(return_id
, return_ranges
, expr
);
1287 } END_FOR_EACH_PTR(cb
);
1290 __push_true_states();
1291 __use_false_states();
1293 if (ret
.value
!= 1) {
1294 return_ranges
= alloc_sname("0");
1296 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1299 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1300 cb
->callback(return_id
, return_ranges
, expr
);
1301 } END_FOR_EACH_PTR(cb
);
1304 __merge_true_states();
1305 __free_fake_cur_stree();
1308 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1310 struct sm_state
*tmp
;
1312 FOR_EACH_PTR(slist
, tmp
) {
1313 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1315 } END_FOR_EACH_PTR(tmp
);
1320 static char *get_return_compare_str(struct expression
*expr
)
1328 compare_str
= expr_lte_to_param(expr
, -1);
1331 param
= get_param_num(expr
);
1335 var
= expr_to_var(expr
);
1338 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1339 comparison
= get_comparison_strings(var
, buf
);
1345 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1346 return alloc_sname(buf
);
1349 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1351 struct returned_state_callback
*cb
;
1352 struct range_list
*rl
;
1353 char *return_ranges
;
1354 struct sm_state
*tmp
;
1356 int nr_possible
, nr_states
;
1357 char *compare_str
= NULL
;
1359 struct state_list
*already_handled
= NULL
;
1361 if (!sm
|| !sm
->merged
)
1364 if (too_many_possible(sm
))
1367 /* bail if it gets too complicated */
1368 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1369 nr_states
= get_db_state_count();
1370 if (nr_states
* nr_possible
>= 2000)
1373 FOR_EACH_PTR(sm
->possible
, tmp
) {
1376 if (ptr_in_list(tmp
, already_handled
))
1378 add_ptr_list(&already_handled
, tmp
);
1381 __push_fake_cur_stree();
1383 overwrite_states_using_pool(sm
, tmp
);
1385 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1386 return_ranges
= show_rl(rl
);
1387 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1388 compare_str
= get_return_compare_str(expr
);
1390 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1391 return_ranges
= alloc_sname(buf
);
1395 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1396 cb
->callback(return_id
, return_ranges
, expr
);
1397 } END_FOR_EACH_PTR(cb
);
1399 __free_fake_cur_stree();
1400 } END_FOR_EACH_PTR(tmp
);
1402 free_slist(&already_handled
);
1407 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1409 struct sm_state
*sm
;
1411 if (!expr
|| expr_equal_to_param(expr
, -1))
1414 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1415 return split_possible_helper(sm
, expr
);
1418 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1420 struct range_list
*rl
;
1421 char *return_ranges
;
1430 return alloc_sname("");
1432 if (get_implied_value(expr
, &sval
)) {
1433 sval
= sval_cast(cur_func_return_type(), sval
);
1434 *rl_p
= alloc_rl(sval
, sval
);
1435 return sval_to_str(sval
);
1438 compare_str
= expr_equal_to_param(expr
, -1);
1439 math_str
= get_value_in_terms_of_parameter_math(expr
);
1441 if (get_implied_rl(expr
, &rl
)) {
1442 rl
= cast_rl(cur_func_return_type(), rl
);
1443 return_ranges
= show_rl(rl
);
1444 } else if (get_imaginary_absolute(expr
, &rl
)){
1445 rl
= cast_rl(cur_func_return_type(), rl
);
1446 return alloc_sname(show_rl(rl
));
1448 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1449 return_ranges
= show_rl(rl
);
1454 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1455 return alloc_sname(buf
);
1458 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1459 return alloc_sname(buf
);
1461 compare_str
= get_return_compare_str(expr
);
1463 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1464 return alloc_sname(buf
);
1467 return return_ranges
;
1470 static int split_positive_from_negative(struct expression
*expr
)
1472 struct returned_state_callback
*cb
;
1473 struct range_list
*rl
;
1474 const char *return_ranges
;
1475 struct range_list
*ret_rl
;
1478 /* We're going to print the states 3 times */
1479 if (get_db_state_count() > 10000 / 3)
1482 if (!get_implied_rl(expr
, &rl
) || !rl
)
1484 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1486 /* Forget about INT_MAX and larger */
1487 if (rl_max(rl
).value
<= 0)
1489 if (!sval_is_negative(rl_min(rl
)))
1492 if (!assume(compare_expression(expr
, '>', zero_expr())))
1496 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1497 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1498 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1499 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1500 } END_FOR_EACH_PTR(cb
);
1504 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1505 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1508 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1509 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1510 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1511 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1512 } END_FOR_EACH_PTR(cb
);
1518 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1521 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1522 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1523 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1524 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1525 } END_FOR_EACH_PTR(cb
);
1533 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1535 struct returned_state_callback
*cb
;
1536 struct range_list
*rl
;
1537 struct range_list
*nonnull_rl
;
1539 struct range_list
*null_rl
= NULL
;
1540 char *return_ranges
;
1541 struct sm_state
*sm
;
1542 struct smatch_state
*state
;
1544 int final_pass_orig
= final_pass
;
1546 if (!expr
|| expr_equal_to_param(expr
, -1))
1548 if (expr
->type
== EXPR_CALL
)
1550 if (!is_pointer(expr
))
1553 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1556 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1559 if (!estate_rl(state
))
1561 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1563 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1566 nr_states
= get_db_state_count();
1567 if (option_info
&& nr_states
>= 1500)
1570 rl
= estate_rl(state
);
1572 __push_fake_cur_stree();
1575 __split_whole_condition(expr
);
1576 final_pass
= final_pass_orig
;
1578 nonnull_rl
= rl_filter(rl
, rl_zero());
1579 return_ranges
= show_rl(nonnull_rl
);
1580 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1583 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1584 cb
->callback(return_id
, return_ranges
, expr
);
1585 } END_FOR_EACH_PTR(cb
);
1587 __push_true_states();
1588 __use_false_states();
1590 return_ranges
= alloc_sname("0");
1591 null_sval
= sval_type_val(rl_type(rl
), 0);
1592 add_range(&null_rl
, null_sval
, null_sval
);
1593 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1595 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1596 cb
->callback(return_id
, return_ranges
, expr
);
1597 } END_FOR_EACH_PTR(cb
);
1599 __merge_true_states();
1600 __free_fake_cur_stree();
1605 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1607 struct range_list
*rl
;
1608 struct range_list
*nonzero_rl
;
1610 struct range_list
*zero_rl
= NULL
;
1612 struct returned_state_callback
*cb
;
1613 char *return_ranges
;
1614 int final_pass_orig
= final_pass
;
1617 if (option_project
!= PROJ_KERNEL
)
1620 nr_states
= get_db_state_count();
1621 if (nr_states
> 1500)
1624 if (get_value(expr
, &val
))
1626 if (!get_implied_rl(expr
, &rl
))
1628 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1630 if (rl_max(rl
).value
!= 0)
1633 __push_fake_cur_stree();
1636 __split_whole_condition(expr
);
1637 final_pass
= final_pass_orig
;
1639 nonzero_rl
= rl_filter(rl
, rl_zero());
1640 return_ranges
= show_rl(nonzero_rl
);
1641 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1644 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1645 cb
->callback(return_id
, return_ranges
, expr
);
1646 } END_FOR_EACH_PTR(cb
);
1648 __push_true_states();
1649 __use_false_states();
1651 return_ranges
= alloc_sname("0");
1652 zero_sval
= sval_type_val(rl_type(rl
), 0);
1653 add_range(&zero_rl
, zero_sval
, zero_sval
);
1654 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1656 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1657 cb
->callback(return_id
, return_ranges
, expr
);
1658 } END_FOR_EACH_PTR(cb
);
1660 __merge_true_states();
1661 __free_fake_cur_stree();
1666 static int is_boolean(struct expression
*expr
)
1668 struct range_list
*rl
;
1670 if (!get_implied_rl(expr
, &rl
))
1672 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1677 static int is_conditional(struct expression
*expr
)
1681 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1686 static int splitable_function_call(struct expression
*expr
)
1688 struct sm_state
*sm
;
1691 if (!expr
|| expr
->type
!= EXPR_CALL
)
1693 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1694 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1695 return split_possible_helper(sm
, expr
);
1698 static struct sm_state
*find_bool_param(void)
1700 struct stree
*start_states
;
1702 struct sm_state
*sm
, *tmp
;
1705 start_states
= get_start_states();
1707 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1710 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1713 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1714 rl_max(estate_rl(sm
->state
)).value
!= 1)
1717 } END_FOR_EACH_PTR_REVERSE(arg
);
1723 * Check if it's splitable. If not, then splitting it up is likely not
1724 * useful for the callers.
1726 FOR_EACH_PTR(sm
->possible
, tmp
) {
1729 if (!estate_get_single_value(tmp
->state
, &sval
))
1731 } END_FOR_EACH_PTR(tmp
);
1736 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1738 struct returned_state_callback
*cb
;
1739 struct range_list
*ret_rl
;
1740 const char *return_ranges
;
1741 struct sm_state
*tmp
;
1743 int nr_possible
, nr_states
;
1744 char *compare_str
= NULL
;
1746 struct state_list
*already_handled
= NULL
;
1748 if (!sm
|| !sm
->merged
)
1751 if (too_many_possible(sm
))
1754 /* bail if it gets too complicated */
1755 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1756 nr_states
= get_db_state_count();
1757 if (nr_states
* nr_possible
>= 2000)
1760 FOR_EACH_PTR(sm
->possible
, tmp
) {
1763 if (ptr_in_list(tmp
, already_handled
))
1765 add_ptr_list(&already_handled
, tmp
);
1768 __push_fake_cur_stree();
1770 overwrite_states_using_pool(sm
, tmp
);
1772 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1773 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1774 compare_str
= get_return_compare_str(expr
);
1776 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1777 return_ranges
= alloc_sname(buf
);
1781 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1782 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1783 } END_FOR_EACH_PTR(cb
);
1785 __free_fake_cur_stree();
1786 } END_FOR_EACH_PTR(tmp
);
1788 free_slist(&already_handled
);
1793 static int split_by_bool_param(struct expression
*expr
)
1795 struct sm_state
*start_sm
, *sm
;
1798 start_sm
= find_bool_param();
1801 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1802 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1804 return split_on_bool_sm(sm
, expr
);
1807 static int split_by_null_nonnull_param(struct expression
*expr
)
1810 struct sm_state
*sm
;
1812 .type
= &ulong_ctype
,
1815 /* function must only take one pointer */
1816 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1818 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1821 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1824 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1826 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1830 if (!rl_has_sval(estate_rl(sm
->state
), zero
))
1833 return split_on_bool_sm(sm
, expr
);
1836 struct expression
*strip_expr_statement(struct expression
*expr
)
1838 struct expression
*orig
= expr
;
1839 struct statement
*stmt
, *last_stmt
;
1843 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1845 if (expr
->type
!= EXPR_STATEMENT
)
1847 stmt
= expr
->statement
;
1848 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1851 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1852 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1853 last_stmt
= last_stmt
->label_statement
;
1854 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1856 return strip_expr(last_stmt
->expression
);
1859 static void call_return_state_hooks(struct expression
*expr
)
1861 struct returned_state_callback
*cb
;
1862 struct range_list
*ret_rl
;
1863 const char *return_ranges
;
1867 if (__path_is_null())
1870 expr
= strip_expr(expr
);
1871 expr
= strip_expr_statement(expr
);
1873 if (is_impossible_path())
1876 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1877 !get_implied_value(expr
, &sval
)) &&
1878 (is_condition(expr
) || is_boolean(expr
))) {
1879 call_return_state_hooks_compare(expr
);
1881 } else if (is_conditional(expr
)) {
1882 call_return_state_hooks_conditional(expr
);
1884 } else if (call_return_state_hooks_split_possible(expr
)) {
1886 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1888 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1890 } else if (splitable_function_call(expr
)) {
1892 } else if (split_positive_from_negative(expr
)) {
1894 } else if (split_by_bool_param(expr
)) {
1895 } else if (split_by_null_nonnull_param(expr
)) {
1900 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1901 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1904 nr_states
= get_db_state_count();
1905 if (nr_states
>= 10000) {
1906 match_return_info(return_id
, (char *)return_ranges
, expr
);
1907 mark_all_params_untracked(return_id
, (char *)return_ranges
, expr
);
1910 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1911 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1912 } END_FOR_EACH_PTR(cb
);
1915 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1917 struct returned_member_callback
*cb
;
1918 struct stree
*stree
;
1919 struct sm_state
*sm
;
1920 struct symbol
*type
;
1922 char member_name
[256];
1925 type
= get_type(expr
);
1926 if (!type
|| type
->type
!= SYM_PTR
)
1928 name
= expr_to_var(expr
);
1932 member_name
[sizeof(member_name
) - 1] = '\0';
1933 strcpy(member_name
, "$");
1936 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1937 stree
= __get_cur_stree();
1938 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1939 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1940 strcpy(member_name
, "*$");
1941 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1944 if (strncmp(sm
->name
, name
, len
) != 0)
1946 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1948 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1949 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1950 } END_FOR_EACH_SM(sm
);
1951 } END_FOR_EACH_PTR(cb
);
1956 static void reset_memdb(struct symbol
*sym
)
1958 mem_sql(NULL
, NULL
, "delete from caller_info;");
1959 mem_sql(NULL
, NULL
, "delete from return_states;");
1960 mem_sql(NULL
, NULL
, "delete from call_implies;");
1963 static void match_end_func_info(struct symbol
*sym
)
1965 if (__path_is_null())
1967 call_return_state_hooks(NULL
);
1970 static void match_after_func(struct symbol
*sym
)
1976 static void init_memdb(void)
1980 const char *schema_files
[] = {
1982 "db/caller_info.schema",
1983 "db/return_states.schema",
1984 "db/function_type_size.schema",
1985 "db/type_size.schema",
1986 "db/call_implies.schema",
1987 "db/function_ptr.schema",
1988 "db/local_values.schema",
1989 "db/function_type_value.schema",
1990 "db/type_value.schema",
1991 "db/function_type.schema",
1992 "db/data_info.schema",
1993 "db/parameter_name.schema",
1994 "db/constraints.schema",
1995 "db/constraints_required.schema",
1996 "db/fn_ptr_data_link.schema",
1997 "db/fn_data_link.schema",
1998 "db/mtag_about.schema",
1999 "db/mtag_map.schema",
2000 "db/mtag_data.schema",
2001 "db/mtag_alias.schema",
2003 static char buf
[4096];
2008 rc
= sqlite3_open(":memory:", &mem_db
);
2009 if (rc
!= SQLITE_OK
) {
2010 printf("Error starting In-Memory database.");
2014 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
2015 fd
= open_data_file(schema_files
[i
]);
2017 printf("failed to open: %s\n", schema_files
[i
]);
2020 ret
= read(fd
, buf
, sizeof(buf
));
2022 printf("failed to read: %s\n", schema_files
[i
]);
2026 if (ret
== sizeof(buf
)) {
2027 printf("Schema file too large: %s (limit %zd bytes)",
2028 schema_files
[i
], sizeof(buf
));
2032 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
2033 if (rc
!= SQLITE_OK
) {
2034 fprintf(stderr
, "SQL error #2: %s\n", err
);
2035 fprintf(stderr
, "%s\n", buf
);
2040 void open_smatch_db(void)
2047 use_states
= malloc(num_checks
+ 1);
2048 memset(use_states
, 0xff, num_checks
+ 1);
2052 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
2053 if (rc
!= SQLITE_OK
) {
2060 static void register_common_funcs(void)
2062 struct token
*token
;
2066 if (option_project
== PROJ_NONE
)
2067 strcpy(filename
, "common_functions");
2069 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2071 token
= get_tokens_file(filename
);
2074 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2076 token
= token
->next
;
2077 while (token_type(token
) != TOKEN_STREAMEND
) {
2078 if (token_type(token
) != TOKEN_IDENT
)
2080 func
= alloc_string(show_ident(token
->ident
));
2081 add_ptr_list(&common_funcs
, func
);
2082 token
= token
->next
;
2084 clear_token_alloc();
2087 static char *get_next_string(char **str
)
2089 static char string
[256];
2098 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2103 memcpy(string
, start
, 255);
2105 printf("return_fix: '%s' too long", string
);
2109 memcpy(string
, start
, len
);
2117 static void register_return_replacements(void)
2119 char *func
, *orig
, *new;
2125 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2126 fd
= open_data_file(filename
);
2129 ret
= read(fd
, buf
, sizeof(buf
));
2133 if (ret
== sizeof(buf
)) {
2134 printf("file too large: %s (limit %zd bytes)",
2135 filename
, sizeof(buf
));
2142 get_next_string(&p
);
2145 if (replace_count
== 0 || replace_count
% 3 != 0) {
2149 replace_table
= malloc(replace_count
* sizeof(char *));
2154 func
= alloc_string(get_next_string(&p
));
2155 orig
= alloc_string(get_next_string(&p
));
2156 new = alloc_string(get_next_string(&p
));
2158 replace_table
[i
++] = func
;
2159 replace_table
[i
++] = orig
;
2160 replace_table
[i
++] = new;
2164 void register_definition_db_callbacks(int id
)
2166 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2167 add_hook(&global_variable
, BASE_HOOK
);
2168 add_hook(&global_variable
, DECLARATION_HOOK
);
2169 add_split_return_callback(match_return_info
);
2170 add_split_return_callback(print_returned_struct_members
);
2171 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2172 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2173 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2175 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2176 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
2178 register_common_funcs();
2179 register_return_replacements();
2182 void register_db_call_marker(int id
)
2184 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2187 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2189 struct expression
*arg
;
2191 char member_name
[256];
2196 const char *star
= "";
2198 if (expr
->type
!= EXPR_ASSIGNMENT
)
2200 name
= expr_to_var_sym(expr
->left
, sym
);
2203 if (key
[0] == '*') {
2207 if (strncmp(key
, "$", 1) != 0)
2209 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2211 return alloc_string(member_name
);
2214 while (expr
->type
== EXPR_ASSIGNMENT
)
2215 expr
= strip_expr(expr
->right
);
2216 if (expr
->type
!= EXPR_CALL
)
2219 arg
= get_argument_from_call_expr(expr
->args
, param
);
2223 return get_variable_from_key(arg
, key
, sym
);
2226 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2234 arg
= strip_expr(arg
);
2236 if (strcmp(key
, "$") == 0)
2237 return expr_to_var_sym(arg
, sym
);
2239 if (strcmp(key
, "*$") == 0) {
2240 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2241 arg
= strip_expr(arg
->unop
);
2242 return expr_to_var_sym(arg
, sym
);
2244 tmp
= expr_to_var_sym(arg
, sym
);
2247 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2249 return alloc_string(buf
);
2253 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2254 arg
= strip_expr(arg
->unop
);
2255 tmp
= expr_to_var_sym(arg
, sym
);
2258 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2259 return alloc_string(buf
);
2262 tmp
= expr_to_var_sym(arg
, sym
);
2265 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2267 return alloc_string(buf
);
2270 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2274 if (strcmp("$", key
) == 0)
2275 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2276 return get_variable_from_key(arg
, key
, sym
);
2279 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2282 static char buf
[256];
2284 name_len
= strlen(param_name
);
2286 if (strcmp(state_name
, param_name
) == 0) {
2288 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2289 strncmp(state_name
, param_name
, name_len
) == 0) {
2290 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2292 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2298 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2300 if (!sym
|| !sym
->ident
)
2303 return state_name_to_param_name(name
, sym
->ident
->name
);
2306 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2308 struct symbol
*type
;
2309 const char *sym_name
;
2311 static char buf
[256];
2314 * mtag_name is different from param_name because mtags can be a struct
2315 * instead of a struct pointer. But we want to treat it like a pointer
2316 * because really an mtag is a pointer. Or in other words, if you pass
2317 * a struct foo then you want to talk about foo.bar but with an mtag
2318 * you want to refer to it as foo->bar.
2322 if (!sym
|| !sym
->ident
)
2325 type
= get_real_base_type(sym
);
2326 if (type
&& type
->type
== SYM_BASETYPE
)
2329 sym_name
= sym
->ident
->name
;
2330 name_len
= strlen(sym_name
);
2332 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2333 strncmp(state_name
, sym_name
, name_len
) == 0) {
2334 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2338 return state_name_to_param_name(state_name
, sym_name
);
2341 const char *get_mtag_name_expr(struct expression
*expr
)
2345 const char *ret
= NULL
;
2347 name
= expr_to_var_sym(expr
, &sym
);
2351 ret
= get_mtag_name_var_sym(name
, sym
);
2357 const char *get_param_name(struct sm_state
*sm
)
2359 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2362 char *get_data_info_name(struct expression
*expr
)
2369 expr
= strip_expr(expr
);
2370 name
= get_member_name(expr
);
2373 name
= expr_to_var_sym(expr
, &sym
);
2376 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2378 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2379 snprintf(buf
, sizeof(buf
), "static %s", name
);
2381 snprintf(buf
, sizeof(buf
), "global %s", name
);
2382 ret
= alloc_sname(buf
);