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, 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: insert %sinto " #table " values(", \
61 ignore ? "or ignore " : ""); \
68 #define sql_insert(table, values...) sql_insert_helper(table, 0, values);
69 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 1, values);
73 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
75 ALLOCATOR(def_callback
, "definition db hook callbacks");
76 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
77 static struct callback_list
*select_caller_info_callbacks
;
79 struct member_info_callback
{
81 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
83 ALLOCATOR(member_info_callback
, "caller_info callbacks");
84 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
85 static struct member_info_cb_list
*member_callbacks
;
87 struct returned_state_callback
{
88 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
90 ALLOCATOR(returned_state_callback
, "returned state callbacks");
91 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
92 static struct returned_state_cb_list
*returned_state_callbacks
;
94 struct returned_member_callback
{
96 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
98 ALLOCATOR(returned_member_callback
, "returned member callbacks");
99 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
100 static struct returned_member_cb_list
*returned_member_callbacks
;
102 struct call_implies_callback
{
104 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
106 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
107 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
108 static struct call_implies_cb_list
*call_implies_cb_list
;
110 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
114 for (i
= 0; i
< argc
; i
++) {
117 sm_printf("%s", argv
[i
]);
123 void debug_sql(const char *sql
)
128 sql_exec(print_sql_output
, NULL
, sql
);
131 void debug_mem_sql(const char *sql
)
136 sql_mem_exec(print_sql_output
, NULL
, sql
);
139 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
144 if (option_no_db
|| !db
)
147 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
148 if (rc
!= SQLITE_OK
&& !parse_error
) {
149 fprintf(stderr
, "SQL error #2: %s\n", err
);
150 fprintf(stderr
, "SQL: '%s'\n", sql
);
155 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
163 rc
= sqlite3_exec(mem_db
, sql
, callback
, data
, &err
);
164 if (rc
!= SQLITE_OK
) {
165 fprintf(stderr
, "SQL error #2: %s\n", err
);
166 fprintf(stderr
, "SQL: '%s'\n", sql
);
171 static int replace_count
;
172 static char **replace_table
;
173 static const char *replace_return_ranges(const char *return_ranges
)
177 if (!get_function()) {
178 /* I have no idea why EXPORT_SYMBOL() is here */
179 return return_ranges
;
181 for (i
= 0; i
< replace_count
; i
+= 3) {
182 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
183 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
184 return replace_table
[i
+ 2];
187 return return_ranges
;
190 void sql_insert_return_states(int return_id
, const char *return_ranges
,
191 int type
, int param
, const char *key
, const char *value
)
193 if (key
&& strlen(key
) >= 80)
195 return_ranges
= replace_return_ranges(return_ranges
);
196 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
197 get_base_file(), get_function(), (unsigned long)__inline_fn
,
198 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
201 static struct string_list
*common_funcs
;
202 static int is_common_function(const char *fn
)
209 if (strncmp(fn
, "__builtin_", 10) == 0)
212 FOR_EACH_PTR(common_funcs
, tmp
) {
213 if (strcmp(tmp
, fn
) == 0)
215 } END_FOR_EACH_PTR(tmp
);
220 static char *function_signature(void)
222 return type_to_str(get_real_base_type(cur_func_sym
));
225 void sql_insert_caller_info(struct expression
*call
, int type
,
226 int param
, const char *key
, const char *value
)
228 FILE *tmp_fd
= sm_outfd
;
231 if (!option_info
&& !__inline_call
)
234 if (key
&& strlen(key
) >= 80)
237 fn
= get_fnptr_name(call
->fn
);
243 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
244 get_base_file(), get_function(), fn
, (unsigned long)call
,
245 is_static(call
->fn
), type
, param
, key
, value
);
251 if (strncmp(fn
, "__builtin_", 10) == 0)
253 if (type
!= INTERNAL
&& is_common_function(fn
))
256 sm_outfd
= caller_info_fd
;
257 sm_msg("SQL_caller_info: insert into caller_info values ("
258 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
259 get_base_file(), get_function(), fn
, is_static(call
->fn
),
260 type
, param
, key
, value
);
266 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
268 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
272 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
274 sql_insert(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'", get_base_file(),
275 get_function(), (unsigned long)__inline_fn
, fn_static(),
276 type
, param
, key
, value
);
279 void sql_insert_function_type_size(const char *member
, const char *ranges
)
281 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
284 void sql_insert_local_values(const char *name
, const char *value
)
286 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
289 void sql_insert_function_type_value(const char *type
, const char *value
)
291 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
294 void sql_insert_function_type(int param
, const char *value
)
296 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
297 get_base_file(), get_function(), fn_static(), param
, value
);
300 void sql_insert_parameter_name(int param
, const char *value
)
302 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
303 get_base_file(), get_function(), fn_static(), param
, value
);
306 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
310 data_name
= get_data_info_name(data
);
313 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
314 is_static(data
) ? get_base_file() : "extern",
315 data_name
, type
, value
);
318 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
320 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
321 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
325 void sql_save_constraint(const char *con
)
330 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
333 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
335 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
338 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
343 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
344 "select constraints_required.data, constraints_required.op, '%s' from "
345 "constraints_required where bound = '%s';", new_limit
, old_limit
);
348 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
350 sql_insert(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
353 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
355 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
358 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
359 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
360 fn
->symbol
->ident
->name
,
361 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
362 type
, param
, key
, value
);
365 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
367 sql_insert(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
368 tag
, get_filename(), get_function(), get_lineno(), left_name
, right_name
);
371 char *get_static_filter(struct symbol
*sym
)
373 static char sql_filter
[1024];
375 /* This can only happen on buggy code. Return invalid SQL. */
377 sql_filter
[0] = '\0';
381 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
382 snprintf(sql_filter
, sizeof(sql_filter
),
383 "file = '%s' and function = '%s' and static = '1'",
384 get_base_file(), sym
->ident
->name
);
386 snprintf(sql_filter
, sizeof(sql_filter
),
387 "function = '%s' and static = '0'", sym
->ident
->name
);
393 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
395 int *row_count
= _row_count
;
400 *row_count
= atoi(argv
[0]);
404 static void mark_params_untracked(struct expression
*call
)
406 struct expression
*arg
;
409 FOR_EACH_PTR(call
->args
, arg
) {
410 mark_untracked(call
, i
++, "$", NULL
);
411 } END_FOR_EACH_PTR(arg
);
414 static void sql_select_return_states_pointer(const char *cols
,
415 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
418 int return_count
= 0;
420 ptr
= get_fnptr_name(call
->fn
);
424 run_sql(get_row_count
, &return_count
,
425 "select count(*) from return_states join function_ptr "
426 "where return_states.function == function_ptr.function and "
427 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
428 /* The magic number 100 is just from testing on the kernel. */
429 if (return_count
> 100) {
430 mark_params_untracked(call
);
434 run_sql(callback
, info
,
435 "select %s from return_states join function_ptr where "
436 "return_states.function == function_ptr.function and ptr = '%s' "
437 "and searchable = 1 "
438 "order by function_ptr.file, return_states.file, return_id, type;",
442 static int is_local_symbol(struct expression
*expr
)
444 if (expr
->type
!= EXPR_SYMBOL
)
446 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
451 void sql_select_return_states(const char *cols
, struct expression
*call
,
452 int (*callback
)(void*, int, char**, char**), void *info
)
456 if (is_fake_call(call
))
459 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
460 sql_select_return_states_pointer(cols
, call
, callback
, info
);
464 if (inlinable(call
->fn
)) {
465 mem_sql(callback
, info
,
466 "select %s from return_states where call_id = '%lu' order by return_id, type;",
467 cols
, (unsigned long)call
);
471 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
472 get_static_filter(call
->fn
->symbol
));
473 if (row_count
> 3000)
476 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
477 cols
, get_static_filter(call
->fn
->symbol
));
480 void sql_select_call_implies(const char *cols
, struct expression
*call
,
481 int (*callback
)(void*, int, char**, char**))
483 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
486 if (inlinable(call
->fn
)) {
487 mem_sql(callback
, call
,
488 "select %s from call_implies where call_id = '%lu';",
489 cols
, (unsigned long)call
);
493 run_sql(callback
, call
, "select %s from call_implies where %s;",
494 cols
, get_static_filter(call
->fn
->symbol
));
497 struct select_caller_info_data
{
498 struct stree
*final_states
;
504 static void sql_select_caller_info(struct select_caller_info_data
*data
,
505 const char *cols
, struct symbol
*sym
,
506 int (*callback
)(void*, int, char**, char**))
509 mem_sql(callback
, data
,
510 "select %s from caller_info where call_id = %lu;",
511 cols
, (unsigned long)__inline_fn
);
515 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
517 run_sql(callback
, data
,
518 "select %s from common_caller_info where %s order by call_id;",
519 cols
, get_static_filter(sym
));
523 run_sql(callback
, data
,
524 "select %s from caller_info where %s order by call_id;",
525 cols
, get_static_filter(sym
));
528 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
530 struct def_callback
*def_callback
= __alloc_def_callback(0);
532 def_callback
->hook_type
= type
;
533 def_callback
->callback
= callback
;
534 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
538 * These call backs are used when the --info option is turned on to print struct
539 * member information. For example foo->bar could have a state in
540 * smatch_extra.c and also check_user.c.
542 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
544 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
546 member_callback
->owner
= owner
;
547 member_callback
->callback
= callback
;
548 add_ptr_list(&member_callbacks
, member_callback
);
551 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
553 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
555 callback
->callback
= fn
;
556 add_ptr_list(&returned_state_callbacks
, callback
);
559 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
))
561 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
563 member_callback
->owner
= owner
;
564 member_callback
->callback
= callback
;
565 add_ptr_list(&returned_member_callbacks
, member_callback
);
568 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
570 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
573 cb
->callback
= callback
;
574 add_ptr_list(&call_implies_cb_list
, cb
);
578 struct expression
*static_returns_call
;
579 struct symbol
*return_type
;
580 struct range_list
*return_range_list
;
583 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
585 struct return_info
*ret_info
= _ret_info
;
586 struct range_list
*rl
;
587 struct expression
*call_expr
= ret_info
->static_returns_call
;
591 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
592 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
596 struct range_list
*db_return_vals(struct expression
*expr
)
598 struct return_info ret_info
= {};
602 if (is_fake_call(expr
))
605 snprintf(buf
, sizeof(buf
), "return %p", expr
);
606 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
608 return clone_rl(estate_rl(sm
->state
));
609 ret_info
.static_returns_call
= expr
;
610 ret_info
.return_type
= get_type(expr
);
611 if (!ret_info
.return_type
)
614 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
617 ret_info
.return_range_list
= NULL
;
618 if (inlinable(expr
->fn
)) {
619 mem_sql(db_return_callback
, &ret_info
,
620 "select distinct return from return_states where call_id = '%lu';",
621 (unsigned long)expr
);
623 run_sql(db_return_callback
, &ret_info
,
624 "select distinct return from return_states where %s;",
625 get_static_filter(expr
->fn
->symbol
));
627 return ret_info
.return_range_list
;
630 struct range_list
*db_return_vals_from_str(const char *fn_name
)
632 struct return_info ret_info
;
634 ret_info
.static_returns_call
= NULL
;
635 ret_info
.return_type
= &llong_ctype
;
636 ret_info
.return_range_list
= NULL
;
638 run_sql(db_return_callback
, &ret_info
,
639 "select distinct return from return_states where function = '%s';",
641 return ret_info
.return_range_list
;
644 static void match_call_marker(struct expression
*expr
)
648 type
= get_type(expr
->fn
);
649 if (type
&& type
->type
== SYM_PTR
)
650 type
= get_real_base_type(type
);
653 * we just want to record something in the database so that if we have
654 * two calls like: frob(4); frob(some_unkown); then on the receiving
655 * side we know that sometimes frob is called with unknown parameters.
658 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
661 static char *show_offset(int offset
)
667 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
671 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
672 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
678 char printed_name
[256];
681 expr
= strip_expr(expr
);
682 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
683 expr
= strip_expr(expr
->unop
);
687 name
= expr_to_var_sym(expr
, &sym
);
692 FOR_EACH_SM(stree
, sm
) {
695 if (strcmp(name
, sm
->name
) == 0) {
697 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
698 else /* these are already handled. fixme: handle them here */
700 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
701 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
702 } else if (strncmp(name
, sm
->name
, len
) == 0) {
703 if (isalnum(sm
->name
[len
]))
706 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
708 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
712 callback(call
, param
, printed_name
, sm
);
713 } END_FOR_EACH_SM(sm
);
718 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
720 char **container
= _container
;
721 static char buf
[256];
723 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
728 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
729 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
731 struct expression
*tmp
;
732 char *container
= NULL
;
737 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
)
741 * We can't use the in-mem DB because we have to parse the function
742 * first, then we know if it takes a container, then we know to pass it
743 * the container data.
746 run_sql(¶m_used_callback
, &container
,
747 "select key from call_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
748 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
752 p
= strchr(container
, '-');
761 tmp
= get_assigned_expr(expr
);
765 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
767 expr
= strip_expr(expr
->unop
);
768 holder_offset
= get_member_offset_from_deref(expr
);
769 if (-holder_offset
!= offset
)
772 expr
= strip_expr(expr
->deref
);
773 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
774 expr
= strip_expr(expr
->unop
);
776 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
779 static void match_call_info(struct expression
*call
)
781 struct member_info_callback
*cb
;
782 struct expression
*arg
;
787 name
= get_fnptr_name(call
->fn
);
791 FOR_EACH_PTR(member_callbacks
, cb
) {
792 stree
= get_all_states_stree(cb
->owner
);
794 FOR_EACH_PTR(call
->args
, arg
) {
795 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
796 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
798 } END_FOR_EACH_PTR(arg
);
800 } END_FOR_EACH_PTR(cb
);
805 static int get_param(int param
, char **name
, struct symbol
**sym
)
811 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
813 * this is a temporary hack to work around a bug (I think in sparse?)
814 * 2.6.37-rc1:fs/reiserfs/journal.o
815 * If there is a function definition without parameter name found
816 * after a function implementation then it causes a crash.
820 if (arg
->ident
->name
< (char *)100)
823 *name
= arg
->ident
->name
;
828 } END_FOR_EACH_PTR(arg
);
833 static int function_signature_matches(const char *sig
)
837 my_sig
= function_signature();
839 return 1; /* default to matching */
840 if (strcmp(my_sig
, sig
) == 0)
845 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
847 struct select_caller_info_data
*data
= _data
;
854 struct symbol
*sym
= NULL
;
855 struct def_callback
*def_callback
;
863 func_id
= atoi(argv
[0]);
865 type
= strtol(argv
[1], NULL
, 10);
866 param
= strtol(argv
[2], NULL
, 10);
872 if (data
->prev_func_id
== -1)
873 data
->prev_func_id
= func_id
;
874 if (func_id
!= data
->prev_func_id
) {
875 stree
= __pop_fake_cur_stree();
877 merge_stree(&data
->final_states
, stree
);
879 __push_fake_cur_stree();
881 data
->prev_func_id
= func_id
;
887 if (type
== INTERNAL
&&
888 !function_signature_matches(value
)) {
893 if (param
>= 0 && !get_param(param
, &name
, &sym
))
896 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
897 if (def_callback
->hook_type
== type
)
898 def_callback
->callback(name
, sym
, key
, value
);
899 } END_FOR_EACH_PTR(def_callback
);
904 static void get_direct_callers(struct select_caller_info_data
*data
, struct symbol
*sym
)
906 sql_select_caller_info(data
,
907 "call_id, type, parameter, key, value", sym
,
908 caller_info_callback
);
911 static struct string_list
*ptr_names_done
;
912 static struct string_list
*ptr_names
;
914 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
916 insert_string(&ptr_names
, alloc_string(argv
[0]));
920 static char *get_next_ptr_name(void)
924 FOR_EACH_PTR(ptr_names
, ptr
) {
925 if (list_has_string(ptr_names_done
, ptr
))
927 insert_string(&ptr_names_done
, ptr
);
929 } END_FOR_EACH_PTR(ptr
);
933 static void get_ptr_names(const char *file
, const char *name
)
935 char sql_filter
[1024];
939 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
942 snprintf(sql_filter
, 1024, "function = '%s';", name
);
945 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
947 run_sql(get_ptr_name
, NULL
,
948 "select distinct ptr from function_ptr where %s",
951 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
955 while ((name
= get_next_ptr_name()))
956 get_ptr_names(NULL
, name
);
959 static void match_data_from_db(struct symbol
*sym
)
961 struct select_caller_info_data data
= { .prev_func_id
= -1 };
965 if (!sym
|| !sym
->ident
)
968 __push_fake_cur_stree();
974 if (sym
->ctype
.modifiers
& MOD_STATIC
)
975 get_ptr_names(get_base_file(), sym
->ident
->name
);
977 get_ptr_names(NULL
, sym
->ident
->name
);
979 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
980 __free_ptr_list((struct ptr_list
**)&ptr_names
);
981 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
982 stree
= __pop_fake_cur_stree();
987 get_direct_callers(&data
, sym
);
989 stree
= __pop_fake_cur_stree();
991 merge_stree(&data
.final_states
, stree
);
993 __push_fake_cur_stree();
995 data
.prev_func_id
= -1;
998 FOR_EACH_PTR(ptr_names
, ptr
) {
999 run_sql(caller_info_callback
, &data
,
1000 "select call_id, type, parameter, key, value"
1001 " from common_caller_info where function = '%s' order by call_id",
1003 } END_FOR_EACH_PTR(ptr
);
1006 FOR_EACH_PTR(ptr_names
, ptr
) {
1008 } END_FOR_EACH_PTR(ptr
);
1009 goto free_ptr_names
;
1012 FOR_EACH_PTR(ptr_names
, ptr
) {
1013 run_sql(caller_info_callback
, &data
,
1014 "select call_id, type, parameter, key, value"
1015 " from caller_info where function = '%s' order by call_id",
1018 } END_FOR_EACH_PTR(ptr
);
1021 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1022 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1024 get_direct_callers(&data
, sym
);
1027 stree
= __pop_fake_cur_stree();
1029 merge_stree(&data
.final_states
, stree
);
1032 FOR_EACH_SM(data
.final_states
, sm
) {
1034 } END_FOR_EACH_SM(sm
);
1036 free_stree(&data
.final_states
);
1039 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1041 struct expression
*call_expr
= _call
;
1042 struct call_implies_callback
*cb
;
1043 struct expression
*arg
= NULL
;
1050 type
= atoi(argv
[1]);
1051 param
= atoi(argv
[2]);
1053 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
1054 if (cb
->type
!= type
)
1057 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1061 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1062 } END_FOR_EACH_PTR(cb
);
1067 static void match_call_implies(struct expression
*expr
)
1069 sql_select_call_implies("function, type, parameter, key, value", expr
,
1070 call_implies_callbacks
);
1073 static void print_initializer_list(struct expression_list
*expr_list
,
1074 struct symbol
*struct_type
)
1076 struct expression
*expr
;
1077 struct symbol
*base_type
;
1078 char struct_name
[256];
1080 FOR_EACH_PTR(expr_list
, expr
) {
1081 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1082 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1085 if (expr
->type
!= EXPR_IDENTIFIER
)
1087 if (!expr
->expr_ident
)
1089 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1091 base_type
= get_type(expr
->ident_expression
);
1092 if (!base_type
|| base_type
->type
!= SYM_FN
)
1094 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1095 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1096 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1098 } END_FOR_EACH_PTR(expr
);
1101 static void global_variable(struct symbol
*sym
)
1103 struct symbol
*struct_type
;
1107 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1109 struct_type
= get_base_type(sym
);
1112 if (struct_type
->type
== SYM_ARRAY
) {
1113 struct_type
= get_base_type(struct_type
);
1117 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1119 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1122 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1124 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1127 static void call_return_state_hooks_conditional(struct expression
*expr
)
1129 struct returned_state_callback
*cb
;
1130 struct range_list
*rl
;
1131 char *return_ranges
;
1132 int final_pass_orig
= final_pass
;
1134 __push_fake_cur_stree();
1137 __split_whole_condition(expr
->conditional
);
1138 final_pass
= final_pass_orig
;
1140 if (get_implied_rl(expr
->cond_true
, &rl
))
1141 rl
= cast_rl(cur_func_return_type(), rl
);
1143 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1144 return_ranges
= show_rl(rl
);
1145 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1148 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1149 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1150 } END_FOR_EACH_PTR(cb
);
1152 __push_true_states();
1153 __use_false_states();
1155 if (get_implied_rl(expr
->cond_false
, &rl
))
1156 rl
= cast_rl(cur_func_return_type(), rl
);
1158 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1159 return_ranges
= show_rl(rl
);
1160 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1163 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1164 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1165 } END_FOR_EACH_PTR(cb
);
1167 __merge_true_states();
1168 __free_fake_cur_stree();
1171 static void call_return_state_hooks_compare(struct expression
*expr
)
1173 struct returned_state_callback
*cb
;
1174 char *return_ranges
;
1175 int final_pass_orig
= final_pass
;
1176 sval_t sval
= { .type
= &int_ctype
};
1179 if (!get_implied_value(expr
, &ret
))
1182 __push_fake_cur_stree();
1185 __split_whole_condition(expr
);
1186 final_pass
= final_pass_orig
;
1188 if (ret
.value
!= 0) {
1189 return_ranges
= alloc_sname("1");
1191 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1194 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1195 cb
->callback(return_id
, return_ranges
, expr
);
1196 } END_FOR_EACH_PTR(cb
);
1199 __push_true_states();
1200 __use_false_states();
1202 if (ret
.value
!= 1) {
1203 return_ranges
= alloc_sname("0");
1205 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1208 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1209 cb
->callback(return_id
, return_ranges
, expr
);
1210 } END_FOR_EACH_PTR(cb
);
1213 __merge_true_states();
1214 __free_fake_cur_stree();
1217 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1219 struct sm_state
*tmp
;
1221 FOR_EACH_PTR(slist
, tmp
) {
1222 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1224 } END_FOR_EACH_PTR(tmp
);
1229 static char *get_return_compare_str(struct expression
*expr
)
1237 compare_str
= expr_lte_to_param(expr
, -1);
1240 param
= get_param_num(expr
);
1244 var
= expr_to_var(expr
);
1247 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1248 comparison
= get_comparison_strings(var
, buf
);
1254 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1255 return alloc_sname(buf
);
1258 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1260 struct returned_state_callback
*cb
;
1261 struct range_list
*rl
;
1262 char *return_ranges
;
1263 struct sm_state
*tmp
;
1265 int nr_possible
, nr_states
;
1266 char *compare_str
= NULL
;
1268 struct state_list
*already_handled
= NULL
;
1270 if (!sm
|| !sm
->merged
)
1273 if (too_many_possible(sm
))
1276 /* bail if it gets too complicated */
1277 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1278 nr_states
= stree_count(__get_cur_stree());
1279 if (nr_states
* nr_possible
>= 2000)
1282 FOR_EACH_PTR(sm
->possible
, tmp
) {
1285 if (ptr_in_list(tmp
, already_handled
))
1287 add_ptr_list(&already_handled
, tmp
);
1290 __push_fake_cur_stree();
1292 overwrite_states_using_pool(sm
, tmp
);
1294 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1295 return_ranges
= show_rl(rl
);
1296 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1297 compare_str
= get_return_compare_str(expr
);
1299 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1300 return_ranges
= alloc_sname(buf
);
1304 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1305 cb
->callback(return_id
, return_ranges
, expr
);
1306 } END_FOR_EACH_PTR(cb
);
1308 __free_fake_cur_stree();
1309 } END_FOR_EACH_PTR(tmp
);
1311 free_slist(&already_handled
);
1316 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1318 struct sm_state
*sm
;
1320 if (!expr
|| expr_equal_to_param(expr
, -1))
1323 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1324 return split_possible_helper(sm
, expr
);
1327 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1329 struct range_list
*rl
;
1330 char *return_ranges
;
1339 return alloc_sname("");
1341 if (get_implied_value(expr
, &sval
)) {
1342 sval
= sval_cast(cur_func_return_type(), sval
);
1343 *rl_p
= alloc_rl(sval
, sval
);
1344 return sval_to_str(sval
);
1347 compare_str
= expr_equal_to_param(expr
, -1);
1348 math_str
= get_value_in_terms_of_parameter_math(expr
);
1350 if (get_implied_rl(expr
, &rl
)) {
1351 rl
= cast_rl(cur_func_return_type(), rl
);
1352 return_ranges
= show_rl(rl
);
1353 } else if (get_imaginary_absolute(expr
, &rl
)){
1354 rl
= cast_rl(cur_func_return_type(), rl
);
1355 return alloc_sname(show_rl(rl
));
1357 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1358 return_ranges
= show_rl(rl
);
1363 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1364 return alloc_sname(buf
);
1367 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1368 return alloc_sname(buf
);
1370 compare_str
= get_return_compare_str(expr
);
1372 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1373 return alloc_sname(buf
);
1376 return return_ranges
;
1379 static int split_positive_from_negative(struct expression
*expr
)
1381 struct returned_state_callback
*cb
;
1382 struct range_list
*rl
;
1383 const char *return_ranges
;
1384 struct range_list
*ret_rl
;
1387 /* We're going to print the states 3 times */
1388 if (stree_count(__get_cur_stree()) > 10000 / 3)
1391 if (!get_implied_rl(expr
, &rl
) || !rl
)
1393 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1395 /* Forget about INT_MAX and larger */
1396 if (rl_max(rl
).value
<= 0)
1398 if (!sval_is_negative(rl_min(rl
)))
1401 if (!assume(compare_expression(expr
, '>', zero_expr())))
1405 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1406 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1407 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1408 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1409 } END_FOR_EACH_PTR(cb
);
1413 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1414 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1417 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1418 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1419 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1420 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1421 } END_FOR_EACH_PTR(cb
);
1427 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1430 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1431 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1432 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1433 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1434 } END_FOR_EACH_PTR(cb
);
1442 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1444 struct returned_state_callback
*cb
;
1445 struct range_list
*rl
;
1446 struct range_list
*nonnull_rl
;
1448 struct range_list
*null_rl
= NULL
;
1449 char *return_ranges
;
1450 struct sm_state
*sm
;
1451 struct smatch_state
*state
;
1453 int final_pass_orig
= final_pass
;
1455 if (!expr
|| expr_equal_to_param(expr
, -1))
1457 if (expr
->type
== EXPR_CALL
)
1459 if (!is_pointer(expr
))
1462 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1465 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1468 if (!estate_rl(state
))
1470 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1472 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1475 nr_states
= stree_count(__get_cur_stree());
1476 if (option_info
&& nr_states
>= 1500)
1479 rl
= estate_rl(state
);
1481 __push_fake_cur_stree();
1484 __split_whole_condition(expr
);
1485 final_pass
= final_pass_orig
;
1487 nonnull_rl
= rl_filter(rl
, rl_zero());
1488 return_ranges
= show_rl(nonnull_rl
);
1489 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1492 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1493 cb
->callback(return_id
, return_ranges
, expr
);
1494 } END_FOR_EACH_PTR(cb
);
1496 __push_true_states();
1497 __use_false_states();
1499 return_ranges
= alloc_sname("0");
1500 null_sval
= sval_type_val(rl_type(rl
), 0);
1501 add_range(&null_rl
, null_sval
, null_sval
);
1502 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1504 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1505 cb
->callback(return_id
, return_ranges
, expr
);
1506 } END_FOR_EACH_PTR(cb
);
1508 __merge_true_states();
1509 __free_fake_cur_stree();
1514 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1516 struct range_list
*rl
;
1517 struct range_list
*nonzero_rl
;
1519 struct range_list
*zero_rl
= NULL
;
1521 struct returned_state_callback
*cb
;
1522 char *return_ranges
;
1523 int final_pass_orig
= final_pass
;
1526 if (option_project
!= PROJ_KERNEL
)
1529 nr_states
= stree_count(__get_cur_stree());
1530 if (nr_states
> 1500)
1533 if (get_value(expr
, &val
))
1535 if (!get_implied_rl(expr
, &rl
))
1537 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1539 if (rl_max(rl
).value
!= 0)
1542 __push_fake_cur_stree();
1545 __split_whole_condition(expr
);
1546 final_pass
= final_pass_orig
;
1548 nonzero_rl
= rl_filter(rl
, rl_zero());
1549 return_ranges
= show_rl(nonzero_rl
);
1550 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1553 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1554 cb
->callback(return_id
, return_ranges
, expr
);
1555 } END_FOR_EACH_PTR(cb
);
1557 __push_true_states();
1558 __use_false_states();
1560 return_ranges
= alloc_sname("0");
1561 zero_sval
= sval_type_val(rl_type(rl
), 0);
1562 add_range(&zero_rl
, zero_sval
, zero_sval
);
1563 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1565 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1566 cb
->callback(return_id
, return_ranges
, expr
);
1567 } END_FOR_EACH_PTR(cb
);
1569 __merge_true_states();
1570 __free_fake_cur_stree();
1575 static int is_boolean(struct expression
*expr
)
1577 struct range_list
*rl
;
1579 if (!get_implied_rl(expr
, &rl
))
1581 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1586 static int is_conditional(struct expression
*expr
)
1590 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1595 static int splitable_function_call(struct expression
*expr
)
1597 struct sm_state
*sm
;
1600 if (!expr
|| expr
->type
!= EXPR_CALL
)
1602 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1603 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1604 return split_possible_helper(sm
, expr
);
1607 static struct sm_state
*find_bool_param(void)
1609 struct stree
*start_states
;
1611 struct sm_state
*sm
, *tmp
;
1614 start_states
= get_start_states();
1616 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1619 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1622 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1623 rl_max(estate_rl(sm
->state
)).value
!= 1)
1626 } END_FOR_EACH_PTR_REVERSE(arg
);
1632 * Check if it's splitable. If not, then splitting it up is likely not
1633 * useful for the callers.
1635 FOR_EACH_PTR(sm
->possible
, tmp
) {
1638 if (!estate_get_single_value(tmp
->state
, &sval
))
1640 } END_FOR_EACH_PTR(tmp
);
1645 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1647 struct returned_state_callback
*cb
;
1648 struct range_list
*ret_rl
;
1649 const char *return_ranges
;
1650 struct sm_state
*tmp
;
1652 int nr_possible
, nr_states
;
1653 char *compare_str
= NULL
;
1655 struct state_list
*already_handled
= NULL
;
1657 if (!sm
|| !sm
->merged
)
1660 if (too_many_possible(sm
))
1663 /* bail if it gets too complicated */
1664 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1665 nr_states
= stree_count(__get_cur_stree());
1666 if (nr_states
* nr_possible
>= 2000)
1669 FOR_EACH_PTR(sm
->possible
, tmp
) {
1672 if (ptr_in_list(tmp
, already_handled
))
1674 add_ptr_list(&already_handled
, tmp
);
1677 __push_fake_cur_stree();
1679 overwrite_states_using_pool(sm
, tmp
);
1681 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1682 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1683 compare_str
= get_return_compare_str(expr
);
1685 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1686 return_ranges
= alloc_sname(buf
);
1690 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1691 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1692 } END_FOR_EACH_PTR(cb
);
1694 __free_fake_cur_stree();
1695 } END_FOR_EACH_PTR(tmp
);
1697 free_slist(&already_handled
);
1702 static int split_by_bool_param(struct expression
*expr
)
1704 struct sm_state
*start_sm
, *sm
;
1707 start_sm
= find_bool_param();
1710 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1711 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1713 return split_on_bool_sm(sm
, expr
);
1716 static int split_by_null_nonnull_param(struct expression
*expr
)
1719 struct sm_state
*sm
;
1721 /* function must only take one pointer */
1722 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1724 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1727 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1730 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1732 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1736 return split_on_bool_sm(sm
, expr
);
1739 struct expression
*strip_expr_statement(struct expression
*expr
)
1741 struct expression
*orig
= expr
;
1742 struct statement
*stmt
, *last_stmt
;
1746 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1748 if (expr
->type
!= EXPR_STATEMENT
)
1750 stmt
= expr
->statement
;
1751 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1754 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1755 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1756 last_stmt
= last_stmt
->label_statement
;
1757 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1759 return strip_expr(last_stmt
->expression
);
1762 static void call_return_state_hooks(struct expression
*expr
)
1764 struct returned_state_callback
*cb
;
1765 struct range_list
*ret_rl
;
1766 const char *return_ranges
;
1770 if (__path_is_null())
1773 expr
= strip_expr(expr
);
1774 expr
= strip_expr_statement(expr
);
1776 if (is_impossible_path())
1779 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1780 !get_implied_value(expr
, &sval
)) &&
1781 (is_condition(expr
) || is_boolean(expr
))) {
1782 call_return_state_hooks_compare(expr
);
1784 } else if (is_conditional(expr
)) {
1785 call_return_state_hooks_conditional(expr
);
1787 } else if (call_return_state_hooks_split_possible(expr
)) {
1789 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1791 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1793 } else if (splitable_function_call(expr
)) {
1795 } else if (split_positive_from_negative(expr
)) {
1797 } else if (split_by_bool_param(expr
)) {
1798 } else if (split_by_null_nonnull_param(expr
)) {
1803 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1804 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1807 nr_states
= stree_count(__get_cur_stree());
1808 if (nr_states
>= 10000) {
1809 match_return_info(return_id
, (char *)return_ranges
, expr
);
1812 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1813 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1814 } END_FOR_EACH_PTR(cb
);
1817 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1819 struct returned_member_callback
*cb
;
1820 struct stree
*stree
;
1821 struct sm_state
*sm
;
1822 struct symbol
*type
;
1824 char member_name
[256];
1827 type
= get_type(expr
);
1828 if (!type
|| type
->type
!= SYM_PTR
)
1830 name
= expr_to_var(expr
);
1834 member_name
[sizeof(member_name
) - 1] = '\0';
1835 strcpy(member_name
, "$");
1838 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1839 stree
= __get_cur_stree();
1840 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1841 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1842 strcpy(member_name
, "*$");
1843 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1846 if (strncmp(sm
->name
, name
, len
) != 0)
1848 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1850 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1851 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1852 } END_FOR_EACH_SM(sm
);
1853 } END_FOR_EACH_PTR(cb
);
1858 static void reset_memdb(struct symbol
*sym
)
1860 mem_sql(NULL
, NULL
, "delete from caller_info;");
1861 mem_sql(NULL
, NULL
, "delete from return_states;");
1862 mem_sql(NULL
, NULL
, "delete from call_implies;");
1865 static void match_end_func_info(struct symbol
*sym
)
1867 if (__path_is_null())
1869 call_return_state_hooks(NULL
);
1872 static void match_after_func(struct symbol
*sym
)
1878 static void init_memdb(void)
1882 const char *schema_files
[] = {
1884 "db/caller_info.schema",
1885 "db/return_states.schema",
1886 "db/function_type_size.schema",
1887 "db/type_size.schema",
1888 "db/call_implies.schema",
1889 "db/function_ptr.schema",
1890 "db/local_values.schema",
1891 "db/function_type_value.schema",
1892 "db/type_value.schema",
1893 "db/function_type.schema",
1894 "db/data_info.schema",
1895 "db/parameter_name.schema",
1896 "db/constraints.schema",
1897 "db/constraints_required.schema",
1898 "db/fn_ptr_data_link.schema",
1899 "db/fn_data_link.schema",
1900 "db/mtag_about.schema",
1902 static char buf
[4096];
1907 rc
= sqlite3_open(":memory:", &mem_db
);
1908 if (rc
!= SQLITE_OK
) {
1909 printf("Error starting In-Memory database.");
1913 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1914 fd
= open_data_file(schema_files
[i
]);
1916 printf("failed to open: %s\n", schema_files
[i
]);
1919 ret
= read(fd
, buf
, sizeof(buf
));
1921 printf("failed to read: %s\n", schema_files
[i
]);
1925 if (ret
== sizeof(buf
)) {
1926 printf("Schema file too large: %s (limit %zd bytes)",
1927 schema_files
[i
], sizeof(buf
));
1931 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
1932 if (rc
!= SQLITE_OK
) {
1933 fprintf(stderr
, "SQL error #2: %s\n", err
);
1934 fprintf(stderr
, "%s\n", buf
);
1939 void open_smatch_db(void)
1948 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
1949 if (rc
!= SQLITE_OK
) {
1956 static void register_common_funcs(void)
1958 struct token
*token
;
1962 if (option_project
== PROJ_NONE
)
1963 strcpy(filename
, "common_functions");
1965 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
1967 token
= get_tokens_file(filename
);
1970 if (token_type(token
) != TOKEN_STREAMBEGIN
)
1972 token
= token
->next
;
1973 while (token_type(token
) != TOKEN_STREAMEND
) {
1974 if (token_type(token
) != TOKEN_IDENT
)
1976 func
= alloc_string(show_ident(token
->ident
));
1977 add_ptr_list(&common_funcs
, func
);
1978 token
= token
->next
;
1980 clear_token_alloc();
1983 static char *get_next_string(char **str
)
1985 static char string
[256];
1994 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
1999 memcpy(string
, start
, 255);
2001 printf("return_fix: '%s' too long", string
);
2005 memcpy(string
, start
, len
);
2013 static void register_return_replacements(void)
2015 char *func
, *orig
, *new;
2021 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2022 fd
= open_data_file(filename
);
2025 ret
= read(fd
, buf
, sizeof(buf
));
2029 if (ret
== sizeof(buf
)) {
2030 printf("file too large: %s (limit %zd bytes)",
2031 filename
, sizeof(buf
));
2038 get_next_string(&p
);
2041 if (replace_count
== 0 || replace_count
% 3 != 0) {
2045 replace_table
= malloc(replace_count
* sizeof(char *));
2050 func
= alloc_string(get_next_string(&p
));
2051 orig
= alloc_string(get_next_string(&p
));
2052 new = alloc_string(get_next_string(&p
));
2054 replace_table
[i
++] = func
;
2055 replace_table
[i
++] = orig
;
2056 replace_table
[i
++] = new;
2060 void register_definition_db_callbacks(int id
)
2062 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2063 add_hook(&global_variable
, BASE_HOOK
);
2064 add_hook(&global_variable
, DECLARATION_HOOK
);
2065 add_split_return_callback(match_return_info
);
2066 add_split_return_callback(print_returned_struct_members
);
2067 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2068 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2069 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2071 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2072 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
2074 register_common_funcs();
2075 register_return_replacements();
2078 void register_db_call_marker(int id
)
2080 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2083 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2085 struct expression
*arg
;
2087 char member_name
[256];
2092 const char *star
= "";
2094 if (expr
->type
!= EXPR_ASSIGNMENT
)
2096 name
= expr_to_var_sym(expr
->left
, sym
);
2099 if (key
[0] == '*') {
2103 if (strncmp(key
, "$", 1) != 0)
2105 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2107 return alloc_string(member_name
);
2110 while (expr
->type
== EXPR_ASSIGNMENT
)
2111 expr
= strip_expr(expr
->right
);
2112 if (expr
->type
!= EXPR_CALL
)
2115 arg
= get_argument_from_call_expr(expr
->args
, param
);
2119 return get_variable_from_key(arg
, key
, sym
);
2122 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2130 arg
= strip_expr(arg
);
2132 if (strcmp(key
, "$") == 0)
2133 return expr_to_var_sym(arg
, sym
);
2135 if (strcmp(key
, "*$") == 0) {
2136 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2137 arg
= strip_expr(arg
->unop
);
2138 return expr_to_var_sym(arg
, sym
);
2140 tmp
= expr_to_var_sym(arg
, sym
);
2143 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2145 return alloc_string(buf
);
2149 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2150 arg
= strip_expr(arg
->unop
);
2151 tmp
= expr_to_var_sym(arg
, sym
);
2154 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2155 return alloc_string(buf
);
2158 tmp
= expr_to_var_sym(arg
, sym
);
2161 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2163 return alloc_string(buf
);
2166 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2170 if (strcmp("$", key
) == 0)
2171 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2172 return get_variable_from_key(arg
, key
, sym
);
2175 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2178 static char buf
[256];
2180 name_len
= strlen(param_name
);
2182 if (strcmp(state_name
, param_name
) == 0) {
2184 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2185 strncmp(state_name
, param_name
, name_len
) == 0) {
2186 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2188 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2194 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2196 if (!sym
|| !sym
->ident
)
2199 return state_name_to_param_name(name
, sym
->ident
->name
);
2202 const char *get_param_name(struct sm_state
*sm
)
2204 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2207 char *get_data_info_name(struct expression
*expr
)
2214 expr
= strip_expr(expr
);
2215 name
= get_member_name(expr
);
2218 name
= expr_to_var_sym(expr
, &sym
);
2221 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2223 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2224 snprintf(buf
, sizeof(buf
), "static %s", name
);
2226 snprintf(buf
, sizeof(buf
), "global %s", name
);
2227 ret
= alloc_sname(buf
);