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(table, values...) \
36 char *err, *p = buf; \
42 p += snprintf(p, buf + sizeof(buf) - p, \
43 "insert into %s values (", #table); \
44 p += snprintf(p, buf + sizeof(buf) - p, values); \
45 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
46 sm_debug("in-mem: %s\n", buf); \
47 rc = sqlite3_exec(mem_db, buf, NULL, NULL, &err); \
48 if (rc != SQLITE_OK) { \
49 fprintf(stderr, "SQL error #2: %s\n", err); \
50 fprintf(stderr, "SQL: '%s'\n", buf); \
57 sm_printf("SQL: insert into " #table " values (" values); \
64 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
66 ALLOCATOR(def_callback
, "definition db hook callbacks");
67 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
68 static struct callback_list
*callbacks
;
70 struct member_info_callback
{
72 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
74 ALLOCATOR(member_info_callback
, "caller_info callbacks");
75 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
76 static struct member_info_cb_list
*member_callbacks
;
78 struct returned_state_callback
{
79 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
81 ALLOCATOR(returned_state_callback
, "returned state callbacks");
82 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
83 static struct returned_state_cb_list
*returned_state_callbacks
;
85 struct returned_member_callback
{
87 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
89 ALLOCATOR(returned_member_callback
, "returned member callbacks");
90 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
91 static struct returned_member_cb_list
*returned_member_callbacks
;
93 struct call_implies_callback
{
95 void (*callback
)(struct expression
*arg
, char *key
, char *value
);
97 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
98 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
99 static struct call_implies_cb_list
*call_implies_cb_list
;
101 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
105 for (i
= 0; i
< argc
; i
++) {
108 sm_printf("%s", argv
[i
]);
114 void debug_sql(const char *sql
)
119 sql_exec(print_sql_output
, NULL
, sql
);
122 void debug_mem_sql(const char *sql
)
127 sql_mem_exec(print_sql_output
, NULL
, sql
);
130 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
135 if (option_no_db
|| !db
)
138 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
139 if (rc
!= SQLITE_OK
&& !parse_error
) {
140 fprintf(stderr
, "SQL error #2: %s\n", err
);
141 fprintf(stderr
, "SQL: '%s'\n", sql
);
146 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
154 rc
= sqlite3_exec(mem_db
, sql
, callback
, data
, &err
);
155 if (rc
!= SQLITE_OK
) {
156 fprintf(stderr
, "SQL error #2: %s\n", err
);
157 fprintf(stderr
, "SQL: '%s'\n", sql
);
162 static int replace_count
;
163 static char **replace_table
;
164 static const char *replace_return_ranges(const char *return_ranges
)
168 if (!get_function()) {
169 /* I have no idea why EXPORT_SYMBOL() is here */
170 return return_ranges
;
172 for (i
= 0; i
< replace_count
; i
+= 3) {
173 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
174 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
175 return replace_table
[i
+ 2];
178 return return_ranges
;
181 void sql_insert_return_states(int return_id
, const char *return_ranges
,
182 int type
, int param
, const char *key
, const char *value
)
184 if (key
&& strlen(key
) >= 80)
186 return_ranges
= replace_return_ranges(return_ranges
);
187 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
188 get_base_file(), get_function(), (unsigned long)__inline_fn
,
189 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
192 static struct string_list
*common_funcs
;
193 static int is_common_function(const char *fn
)
197 if (strncmp(fn
, "__builtin_", 10) == 0)
200 FOR_EACH_PTR(common_funcs
, tmp
) {
201 if (strcmp(tmp
, fn
) == 0)
203 } END_FOR_EACH_PTR(tmp
);
208 void sql_insert_caller_info(struct expression
*call
, int type
,
209 int param
, const char *key
, const char *value
)
213 if (!option_info
&& !__inline_call
)
216 if (key
&& strlen(key
) >= 80)
219 fn
= get_fnptr_name(call
->fn
);
225 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
226 get_base_file(), get_function(), fn
, (unsigned long)call
,
227 is_static(call
->fn
), type
, param
, key
, value
);
233 if (is_common_function(fn
))
236 sm_msg("SQL_caller_info: insert into caller_info values ("
237 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
238 get_base_file(), get_function(), fn
, is_static(call
->fn
),
239 type
, param
, key
, value
);
244 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
246 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
250 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
252 sql_insert(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', %s", get_base_file(),
253 get_function(), (unsigned long)__inline_fn
, fn_static(),
254 type
, param
, key
, value
);
257 void sql_insert_function_type_size(const char *member
, const char *ranges
)
259 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
262 void sql_insert_local_values(const char *name
, const char *value
)
264 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
267 void sql_insert_function_type_value(const char *type
, const char *value
)
269 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
272 void sql_insert_function_type(int param
, const char *value
)
274 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
275 get_base_file(), get_function(), fn_static(), param
, value
);
278 void sql_insert_parameter_name(int param
, const char *value
)
280 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
281 get_base_file(), get_function(), fn_static(), param
, value
);
284 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
288 data_name
= get_data_info_name(data
);
291 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
292 is_static(data
) ? get_base_file() : "extern",
293 data_name
, type
, value
);
296 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
298 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
299 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
303 char *get_static_filter(struct symbol
*sym
)
305 static char sql_filter
[1024];
307 /* This can only happen on buggy code. Return invalid SQL. */
309 sql_filter
[0] = '\0';
313 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
314 snprintf(sql_filter
, sizeof(sql_filter
),
315 "file = '%s' and function = '%s' and static = '1'",
316 get_base_file(), sym
->ident
->name
);
318 snprintf(sql_filter
, sizeof(sql_filter
),
319 "function = '%s' and static = '0'", sym
->ident
->name
);
325 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
327 int *row_count
= _row_count
;
332 *row_count
= atoi(argv
[0]);
336 static void sql_select_return_states_pointer(const char *cols
,
337 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
340 int return_count
= 0;
342 ptr
= get_fnptr_name(call
->fn
);
346 run_sql(get_row_count
, &return_count
,
347 "select count(*) from return_states join function_ptr "
348 "where return_states.function == function_ptr.function and "
349 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
350 /* The magic number 100 is just from testing on the kernel. */
351 if (return_count
> 100)
354 run_sql(callback
, info
,
355 "select %s from return_states join function_ptr where "
356 "return_states.function == function_ptr.function and ptr = '%s' "
357 "and searchable = 1 "
358 "order by function_ptr.file, return_states.file, return_id, type;",
362 static int is_local_symbol(struct expression
*expr
)
364 if (expr
->type
!= EXPR_SYMBOL
)
366 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
371 void sql_select_return_states(const char *cols
, struct expression
*call
,
372 int (*callback
)(void*, int, char**, char**), void *info
)
376 if (is_fake_call(call
))
379 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
380 sql_select_return_states_pointer(cols
, call
, callback
, info
);
384 if (inlinable(call
->fn
)) {
385 mem_sql(callback
, info
,
386 "select %s from return_states where call_id = '%lu' order by return_id, type;",
387 cols
, (unsigned long)call
);
391 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
392 get_static_filter(call
->fn
->symbol
));
393 if (row_count
> 3000)
396 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
397 cols
, get_static_filter(call
->fn
->symbol
));
400 void sql_select_call_implies(const char *cols
, struct expression
*call
,
401 int (*callback
)(void*, int, char**, char**))
403 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
406 if (inlinable(call
->fn
)) {
407 mem_sql(callback
, call
,
408 "select %s from call_implies where call_id = '%lu';",
409 cols
, (unsigned long)call
);
413 run_sql(callback
, call
, "select %s from call_implies where %s;",
414 cols
, get_static_filter(call
->fn
->symbol
));
417 void sql_select_caller_info(const char *cols
, struct symbol
*sym
,
418 int (*callback
)(void*, int, char**, char**))
421 mem_sql(callback
, NULL
,
422 "select %s from caller_info where call_id = %lu;",
423 cols
, (unsigned long)__inline_fn
);
427 run_sql(callback
, NULL
,
428 "select %s from caller_info where %s order by call_id;",
429 cols
, get_static_filter(sym
));
432 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
434 struct def_callback
*def_callback
= __alloc_def_callback(0);
436 def_callback
->hook_type
= type
;
437 def_callback
->callback
= callback
;
438 add_ptr_list(&callbacks
, def_callback
);
442 * These call backs are used when the --info option is turned on to print struct
443 * member information. For example foo->bar could have a state in
444 * smatch_extra.c and also check_user.c.
446 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
448 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
450 member_callback
->owner
= owner
;
451 member_callback
->callback
= callback
;
452 add_ptr_list(&member_callbacks
, member_callback
);
455 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
457 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
459 callback
->callback
= fn
;
460 add_ptr_list(&returned_state_callbacks
, callback
);
463 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
))
465 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
467 member_callback
->owner
= owner
;
468 member_callback
->callback
= callback
;
469 add_ptr_list(&returned_member_callbacks
, member_callback
);
472 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*arg
, char *key
, char *value
))
474 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
477 cb
->callback
= callback
;
478 add_ptr_list(&call_implies_cb_list
, cb
);
482 struct expression
*static_returns_call
;
483 struct symbol
*return_type
;
484 struct range_list
*return_range_list
;
487 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
489 struct return_info
*ret_info
= _ret_info
;
490 struct range_list
*rl
;
491 struct expression
*call_expr
= ret_info
->static_returns_call
;
495 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
496 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
500 struct range_list
*db_return_vals(struct expression
*expr
)
502 struct return_info ret_info
= {};
506 if (is_fake_call(expr
))
509 snprintf(buf
, sizeof(buf
), "return %p", expr
);
510 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
512 return clone_rl(estate_rl(sm
->state
));
513 ret_info
.static_returns_call
= expr
;
514 ret_info
.return_type
= get_type(expr
);
515 if (!ret_info
.return_type
)
518 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
521 ret_info
.return_range_list
= NULL
;
522 if (inlinable(expr
->fn
)) {
523 mem_sql(db_return_callback
, &ret_info
,
524 "select distinct return from return_states where call_id = '%lu';",
525 (unsigned long)expr
);
527 run_sql(db_return_callback
, &ret_info
,
528 "select distinct return from return_states where %s;",
529 get_static_filter(expr
->fn
->symbol
));
531 return ret_info
.return_range_list
;
534 struct range_list
*db_return_vals_from_str(const char *fn_name
)
536 struct return_info ret_info
;
538 ret_info
.static_returns_call
= NULL
;
539 ret_info
.return_type
= &llong_ctype
;
540 ret_info
.return_range_list
= NULL
;
542 run_sql(db_return_callback
, &ret_info
,
543 "select distinct return from return_states where function = '%s';",
545 return ret_info
.return_range_list
;
548 static void match_call_marker(struct expression
*expr
)
551 * we just want to record something in the database so that if we have
552 * two calls like: frob(4); frob(some_unkown); then on the receiving
553 * side we know that sometimes frob is called with unknown parameters.
556 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", "");
559 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
560 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
566 char printed_name
[256];
569 expr
= strip_expr(expr
);
570 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
571 expr
= strip_expr(expr
->unop
);
575 name
= expr_to_var_sym(expr
, &sym
);
580 FOR_EACH_SM(stree
, sm
) {
583 if (strcmp(name
, sm
->name
) == 0) {
585 snprintf(printed_name
, sizeof(printed_name
), "*$");
586 else /* these are already handled. fixme: handle them here */
588 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
589 snprintf(printed_name
, sizeof(printed_name
), "*$");
590 } else if (strncmp(name
, sm
->name
, len
) == 0) {
591 if (isalnum(sm
->name
[len
]))
594 snprintf(printed_name
, sizeof(printed_name
), "$->%s", sm
->name
+ len
+ 1);
596 snprintf(printed_name
, sizeof(printed_name
), "$%s", sm
->name
+ len
);
600 callback(call
, param
, printed_name
, sm
);
601 } END_FOR_EACH_SM(sm
);
606 static void match_call_info(struct expression
*call
)
608 struct member_info_callback
*cb
;
609 struct expression
*arg
;
614 name
= get_fnptr_name(call
->fn
);
618 FOR_EACH_PTR(member_callbacks
, cb
) {
619 stree
= get_all_states_stree(cb
->owner
);
621 FOR_EACH_PTR(call
->args
, arg
) {
622 print_struct_members(call
, arg
, i
, stree
, cb
->callback
);
624 } END_FOR_EACH_PTR(arg
);
626 } END_FOR_EACH_PTR(cb
);
631 static int get_param(int param
, char **name
, struct symbol
**sym
)
637 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
639 * this is a temporary hack to work around a bug (I think in sparse?)
640 * 2.6.37-rc1:fs/reiserfs/journal.o
641 * If there is a function definition without parameter name found
642 * after a function implementation then it causes a crash.
646 if (arg
->ident
->name
< (char *)100)
649 *name
= arg
->ident
->name
;
654 } END_FOR_EACH_PTR(arg
);
659 static struct stree
*final_states
;
660 static int prev_func_id
= -1;
661 static int caller_info_callback(void *unused
, int argc
, char **argv
, char **azColName
)
669 struct symbol
*sym
= NULL
;
670 struct def_callback
*def_callback
;
676 func_id
= atoi(argv
[0]);
678 type
= strtol(argv
[1], NULL
, 10);
679 param
= strtol(argv
[2], NULL
, 10);
686 if (prev_func_id
== -1)
687 prev_func_id
= func_id
;
688 if (func_id
!= prev_func_id
) {
689 stree
= __pop_fake_cur_stree();
690 merge_stree(&final_states
, stree
);
692 __push_fake_cur_stree();
694 prev_func_id
= func_id
;
697 if (param
>= 0 && !get_param(param
, &name
, &sym
))
700 FOR_EACH_PTR(callbacks
, def_callback
) {
701 if (def_callback
->hook_type
== type
)
702 def_callback
->callback(name
, sym
, key
, value
);
703 } END_FOR_EACH_PTR(def_callback
);
708 static void get_direct_callers(struct symbol
*sym
)
710 sql_select_caller_info("call_id, type, parameter, key, value", sym
,
711 caller_info_callback
);
714 static struct string_list
*ptr_names_done
;
715 static struct string_list
*ptr_names
;
717 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
719 insert_string(&ptr_names
, alloc_string(argv
[0]));
723 static char *get_next_ptr_name(void)
727 FOR_EACH_PTR(ptr_names
, ptr
) {
728 if (list_has_string(ptr_names_done
, ptr
))
730 insert_string(&ptr_names_done
, ptr
);
732 } END_FOR_EACH_PTR(ptr
);
736 static void get_ptr_names(const char *file
, const char *name
)
738 char sql_filter
[1024];
742 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
745 snprintf(sql_filter
, 1024, "function = '%s';", name
);
748 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
750 run_sql(get_ptr_name
, NULL
,
751 "select distinct ptr from function_ptr where %s",
754 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
758 while ((name
= get_next_ptr_name()))
759 get_ptr_names(NULL
, name
);
762 static void match_data_from_db(struct symbol
*sym
)
767 if (!sym
|| !sym
->ident
)
770 __push_fake_cur_stree();
777 if (sym
->ctype
.modifiers
& MOD_STATIC
)
778 get_ptr_names(get_base_file(), sym
->ident
->name
);
780 get_ptr_names(NULL
, sym
->ident
->name
);
782 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
783 __free_ptr_list((struct ptr_list
**)&ptr_names
);
784 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
785 stree
= __pop_fake_cur_stree();
790 get_direct_callers(sym
);
792 FOR_EACH_PTR(ptr_names
, ptr
) {
793 run_sql(caller_info_callback
, NULL
,
794 "select call_id, type, parameter, key, value"
795 " from caller_info where function = '%s' order by call_id",
798 } END_FOR_EACH_PTR(ptr
);
800 __free_ptr_list((struct ptr_list
**)&ptr_names
);
801 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
803 get_direct_callers(sym
);
806 stree
= __pop_fake_cur_stree();
807 merge_stree(&final_states
, stree
);
810 FOR_EACH_SM(final_states
, sm
) {
812 } END_FOR_EACH_SM(sm
);
814 free_stree(&final_states
);
817 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
819 struct expression
*call_expr
= _call
;
820 struct call_implies_callback
*cb
;
821 struct expression
*arg
= NULL
;
828 type
= atoi(argv
[1]);
829 param
= atoi(argv
[2]);
831 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
832 if (cb
->type
!= type
)
835 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
839 cb
->callback(arg
, argv
[3], argv
[4]);
840 } END_FOR_EACH_PTR(cb
);
845 static void match_call_implies(struct expression
*expr
)
847 sql_select_call_implies("function, type, parameter, key, value", expr
,
848 call_implies_callbacks
);
851 static void print_initializer_list(struct expression_list
*expr_list
,
852 struct symbol
*struct_type
)
854 struct expression
*expr
;
855 struct symbol
*base_type
;
856 char struct_name
[256];
858 FOR_EACH_PTR(expr_list
, expr
) {
859 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
860 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
863 if (expr
->type
!= EXPR_IDENTIFIER
)
865 if (!expr
->expr_ident
)
867 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
869 base_type
= get_type(expr
->ident_expression
);
870 if (!base_type
|| base_type
->type
!= SYM_FN
)
872 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
873 struct_type
->ident
->name
, expr
->expr_ident
->name
);
874 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
876 } END_FOR_EACH_PTR(expr
);
879 static void global_variable(struct symbol
*sym
)
881 struct symbol
*struct_type
;
885 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
887 struct_type
= get_base_type(sym
);
890 if (struct_type
->type
== SYM_ARRAY
) {
891 struct_type
= get_base_type(struct_type
);
895 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
897 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
900 static char *function_signature(void)
902 return type_to_str(get_real_base_type(cur_func_sym
));
905 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
907 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
910 static void call_return_state_hooks_conditional(struct expression
*expr
)
912 struct returned_state_callback
*cb
;
913 struct range_list
*rl
;
915 int final_pass_orig
= final_pass
;
917 __push_fake_cur_stree();
920 __split_whole_condition(expr
->conditional
);
921 final_pass
= final_pass_orig
;
923 if (get_implied_rl(expr
->cond_true
, &rl
))
924 rl
= cast_rl(cur_func_return_type(), rl
);
926 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
927 return_ranges
= show_rl(rl
);
928 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
931 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
932 cb
->callback(return_id
, return_ranges
, expr
);
933 } END_FOR_EACH_PTR(cb
);
935 __push_true_states();
936 __use_false_states();
938 if (get_implied_rl(expr
->cond_false
, &rl
))
939 rl
= cast_rl(cur_func_return_type(), rl
);
941 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
942 return_ranges
= show_rl(rl
);
943 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
946 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
947 cb
->callback(return_id
, return_ranges
, expr
);
948 } END_FOR_EACH_PTR(cb
);
950 __merge_true_states();
951 __free_fake_cur_stree();
954 static void call_return_state_hooks_compare(struct expression
*expr
)
956 struct returned_state_callback
*cb
;
958 int final_pass_orig
= final_pass
;
959 sval_t sval
= { .type
= &int_ctype
};
962 if (!get_implied_value(expr
, &ret
))
965 __push_fake_cur_stree();
968 __split_whole_condition(expr
);
969 final_pass
= final_pass_orig
;
971 if (ret
.value
!= 0) {
972 return_ranges
= alloc_sname("1");
974 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
977 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
978 cb
->callback(return_id
, return_ranges
, expr
);
979 } END_FOR_EACH_PTR(cb
);
982 __push_true_states();
983 __use_false_states();
985 if (ret
.value
!= 1) {
986 return_ranges
= alloc_sname("0");
988 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
991 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
992 cb
->callback(return_id
, return_ranges
, expr
);
993 } END_FOR_EACH_PTR(cb
);
996 __merge_true_states();
997 __free_fake_cur_stree();
1000 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1002 struct sm_state
*tmp
;
1004 FOR_EACH_PTR(slist
, tmp
) {
1005 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1007 } END_FOR_EACH_PTR(tmp
);
1012 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1014 struct returned_state_callback
*cb
;
1015 struct range_list
*rl
;
1016 char *return_ranges
;
1017 struct sm_state
*tmp
;
1019 int nr_possible
, nr_states
;
1020 char *compare_str
= NULL
;
1022 struct state_list
*already_handled
= NULL
;
1024 if (!sm
|| !sm
->merged
)
1027 if (too_many_possible(sm
))
1030 /* bail if it gets too complicated */
1031 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1032 nr_states
= stree_count(__get_cur_stree());
1033 if (nr_states
* nr_possible
>= 2000)
1036 FOR_EACH_PTR(sm
->possible
, tmp
) {
1039 if (ptr_in_list(tmp
, already_handled
))
1041 add_ptr_list(&already_handled
, tmp
);
1044 __push_fake_cur_stree();
1046 overwrite_states_using_pool(sm
, tmp
);
1048 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1049 return_ranges
= show_rl(rl
);
1050 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1051 compare_str
= expr_lte_to_param(expr
, -1);
1053 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1054 return_ranges
= alloc_sname(buf
);
1058 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1059 cb
->callback(return_id
, return_ranges
, expr
);
1060 } END_FOR_EACH_PTR(cb
);
1062 __free_fake_cur_stree();
1063 } END_FOR_EACH_PTR(tmp
);
1065 free_slist(&already_handled
);
1070 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1072 struct sm_state
*sm
;
1074 if (!expr
|| expr_equal_to_param(expr
, -1))
1077 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1078 return split_possible_helper(sm
, expr
);
1081 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1083 struct range_list
*rl
;
1084 char *return_ranges
;
1093 return alloc_sname("");
1095 if (get_implied_value(expr
, &sval
)) {
1096 sval
= sval_cast(cur_func_return_type(), sval
);
1097 *rl_p
= alloc_rl(sval
, sval
);
1098 return sval_to_str(sval
);
1101 compare_str
= expr_equal_to_param(expr
, -1);
1102 math_str
= get_value_in_terms_of_parameter_math(expr
);
1104 if (get_implied_rl(expr
, &rl
)) {
1105 rl
= cast_rl(cur_func_return_type(), rl
);
1106 return_ranges
= show_rl(rl
);
1107 } else if (get_imaginary_absolute(expr
, &rl
)){
1108 rl
= cast_rl(cur_func_return_type(), rl
);
1109 return alloc_sname(show_rl(rl
));
1111 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1112 return_ranges
= show_rl(rl
);
1117 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1118 return alloc_sname(buf
);
1122 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1123 return alloc_sname(buf
);
1126 compare_str
= expr_lte_to_param(expr
, -1);
1128 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1129 return alloc_sname(buf
);
1131 return return_ranges
;
1134 static int split_positive_from_negative(struct expression
*expr
)
1136 struct returned_state_callback
*cb
;
1137 struct range_list
*rl
;
1138 const char *return_ranges
;
1139 struct range_list
*ret_rl
;
1142 /* We're going to print the states 3 times */
1143 if (stree_count(__get_cur_stree()) > 10000 / 3)
1146 if (!get_implied_rl(expr
, &rl
) || !rl
)
1148 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1150 /* Forget about INT_MAX and larger */
1151 if (rl_max(rl
).value
<= 0)
1153 if (!sval_is_negative(rl_min(rl
)))
1156 if (!assume(compare_expression(expr
, '>', zero_expr())))
1160 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1161 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1162 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1163 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1164 } END_FOR_EACH_PTR(cb
);
1168 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1169 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1172 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1173 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1174 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1175 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1176 } END_FOR_EACH_PTR(cb
);
1182 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1185 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1186 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1187 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1188 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1189 } END_FOR_EACH_PTR(cb
);
1197 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1199 struct returned_state_callback
*cb
;
1200 struct range_list
*rl
;
1201 struct range_list
*nonnull_rl
;
1203 struct range_list
*null_rl
= NULL
;
1204 char *return_ranges
;
1205 struct sm_state
*sm
;
1206 struct smatch_state
*state
;
1208 int final_pass_orig
= final_pass
;
1210 if (!expr
|| expr_equal_to_param(expr
, -1))
1212 if (expr
->type
== EXPR_CALL
)
1214 if (!is_pointer(expr
))
1217 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1220 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1223 if (!estate_rl(state
))
1225 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1227 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1230 nr_states
= stree_count(__get_cur_stree());
1231 if (option_info
&& nr_states
>= 1500)
1234 rl
= estate_rl(state
);
1236 __push_fake_cur_stree();
1239 __split_whole_condition(expr
);
1240 final_pass
= final_pass_orig
;
1242 nonnull_rl
= rl_filter(rl
, rl_zero());
1243 return_ranges
= show_rl(nonnull_rl
);
1244 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1247 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1248 cb
->callback(return_id
, return_ranges
, expr
);
1249 } END_FOR_EACH_PTR(cb
);
1251 __push_true_states();
1252 __use_false_states();
1254 return_ranges
= alloc_sname("0");
1255 null_sval
= sval_type_val(rl_type(rl
), 0);
1256 add_range(&null_rl
, null_sval
, null_sval
);
1257 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1259 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1260 cb
->callback(return_id
, return_ranges
, expr
);
1261 } END_FOR_EACH_PTR(cb
);
1263 __merge_true_states();
1264 __free_fake_cur_stree();
1269 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1271 struct range_list
*rl
;
1272 struct range_list
*nonzero_rl
;
1274 struct range_list
*zero_rl
= NULL
;
1276 struct returned_state_callback
*cb
;
1277 char *return_ranges
;
1278 int final_pass_orig
= final_pass
;
1281 if (option_project
!= PROJ_KERNEL
)
1284 nr_states
= stree_count(__get_cur_stree());
1285 if (nr_states
> 1500)
1288 if (get_value(expr
, &val
))
1290 if (!get_implied_rl(expr
, &rl
))
1292 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1294 if (rl_max(rl
).value
!= 0)
1297 __push_fake_cur_stree();
1300 __split_whole_condition(expr
);
1301 final_pass
= final_pass_orig
;
1303 nonzero_rl
= rl_filter(rl
, rl_zero());
1304 return_ranges
= show_rl(nonzero_rl
);
1305 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1308 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1309 cb
->callback(return_id
, return_ranges
, expr
);
1310 } END_FOR_EACH_PTR(cb
);
1312 __push_true_states();
1313 __use_false_states();
1315 return_ranges
= alloc_sname("0");
1316 zero_sval
= sval_type_val(rl_type(rl
), 0);
1317 add_range(&zero_rl
, zero_sval
, zero_sval
);
1318 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1320 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1321 cb
->callback(return_id
, return_ranges
, expr
);
1322 } END_FOR_EACH_PTR(cb
);
1324 __merge_true_states();
1325 __free_fake_cur_stree();
1330 static int is_boolean(struct expression
*expr
)
1332 struct range_list
*rl
;
1334 if (!get_implied_rl(expr
, &rl
))
1336 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1341 static int is_conditional(struct expression
*expr
)
1345 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1350 static int splitable_function_call(struct expression
*expr
)
1352 struct sm_state
*sm
;
1355 if (!expr
|| expr
->type
!= EXPR_CALL
)
1357 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1358 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1359 return split_possible_helper(sm
, expr
);
1362 static struct sm_state
*find_bool_param(void)
1364 struct stree
*start_states
;
1366 struct sm_state
*sm
, *tmp
;
1369 start_states
= get_start_states();
1371 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1374 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1377 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1378 rl_max(estate_rl(sm
->state
)).value
!= 1)
1381 } END_FOR_EACH_PTR_REVERSE(arg
);
1387 * Check if it's splitable. If not, then splitting it up is likely not
1388 * useful for the callers.
1390 FOR_EACH_PTR(sm
->possible
, tmp
) {
1393 if (!estate_get_single_value(tmp
->state
, &sval
))
1395 } END_FOR_EACH_PTR(tmp
);
1400 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1402 struct returned_state_callback
*cb
;
1403 struct range_list
*ret_rl
;
1404 const char *return_ranges
;
1405 struct sm_state
*tmp
;
1407 int nr_possible
, nr_states
;
1408 char *compare_str
= NULL
;
1410 struct state_list
*already_handled
= NULL
;
1412 if (!sm
|| !sm
->merged
)
1415 if (too_many_possible(sm
))
1418 /* bail if it gets too complicated */
1419 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1420 nr_states
= stree_count(__get_cur_stree());
1421 if (nr_states
* nr_possible
>= 2000)
1424 FOR_EACH_PTR(sm
->possible
, tmp
) {
1427 if (ptr_in_list(tmp
, already_handled
))
1429 add_ptr_list(&already_handled
, tmp
);
1432 __push_fake_cur_stree();
1434 overwrite_states_using_pool(sm
, tmp
);
1436 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1437 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1438 compare_str
= expr_lte_to_param(expr
, -1);
1440 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1441 return_ranges
= alloc_sname(buf
);
1445 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1446 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1447 } END_FOR_EACH_PTR(cb
);
1449 __free_fake_cur_stree();
1450 } END_FOR_EACH_PTR(tmp
);
1452 free_slist(&already_handled
);
1457 static int split_by_bool_param(struct expression
*expr
)
1459 struct sm_state
*start_sm
, *sm
;
1462 start_sm
= find_bool_param();
1465 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1466 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1468 return split_on_bool_sm(sm
, expr
);
1471 static int split_by_null_nonnull_param(struct expression
*expr
)
1474 struct sm_state
*sm
;
1476 /* function must only take one pointer */
1477 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1479 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1482 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1485 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1487 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1491 return split_on_bool_sm(sm
, expr
);
1494 static void call_return_state_hooks(struct expression
*expr
)
1496 struct returned_state_callback
*cb
;
1497 struct range_list
*ret_rl
;
1498 const char *return_ranges
;
1502 if (__path_is_null())
1505 expr
= strip_expr(expr
);
1507 if (is_impossible_path())
1510 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1511 !get_implied_value(expr
, &sval
)) &&
1512 (is_condition(expr
) || is_boolean(expr
))) {
1513 call_return_state_hooks_compare(expr
);
1515 } else if (is_conditional(expr
)) {
1516 call_return_state_hooks_conditional(expr
);
1518 } else if (call_return_state_hooks_split_possible(expr
)) {
1520 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1522 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1524 } else if (splitable_function_call(expr
)) {
1526 } else if (split_positive_from_negative(expr
)) {
1528 } else if (split_by_bool_param(expr
)) {
1529 } else if (split_by_null_nonnull_param(expr
)) {
1534 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1535 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1538 nr_states
= stree_count(__get_cur_stree());
1539 if (nr_states
>= 10000) {
1540 match_return_info(return_id
, (char *)return_ranges
, expr
);
1543 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1544 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1545 } END_FOR_EACH_PTR(cb
);
1548 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1550 struct returned_member_callback
*cb
;
1551 struct stree
*stree
;
1552 struct sm_state
*sm
;
1553 struct symbol
*type
;
1555 char member_name
[256];
1558 type
= get_type(expr
);
1559 if (!type
|| type
->type
!= SYM_PTR
)
1561 name
= expr_to_var(expr
);
1565 member_name
[sizeof(member_name
) - 1] = '\0';
1566 strcpy(member_name
, "$");
1569 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1570 stree
= __get_cur_stree();
1571 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1572 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1573 strcpy(member_name
, "*$");
1574 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1577 if (strncmp(sm
->name
, name
, len
) != 0)
1579 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1581 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1582 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1583 } END_FOR_EACH_SM(sm
);
1584 } END_FOR_EACH_PTR(cb
);
1589 static void reset_memdb(struct symbol
*sym
)
1591 mem_sql(NULL
, NULL
, "delete from caller_info;");
1592 mem_sql(NULL
, NULL
, "delete from return_states;");
1593 mem_sql(NULL
, NULL
, "delete from call_implies;");
1596 static void match_end_func_info(struct symbol
*sym
)
1598 if (__path_is_null())
1600 call_return_state_hooks(NULL
);
1603 static void match_after_func(struct symbol
*sym
)
1609 static void init_memdb(void)
1613 const char *schema_files
[] = {
1615 "db/caller_info.schema",
1616 "db/return_states.schema",
1617 "db/function_type_size.schema",
1618 "db/type_size.schema",
1619 "db/call_implies.schema",
1620 "db/function_ptr.schema",
1621 "db/local_values.schema",
1622 "db/function_type_value.schema",
1623 "db/type_value.schema",
1624 "db/function_type.schema",
1625 "db/data_info.schema",
1626 "db/parameter_name.schema",
1628 static char buf
[4096];
1633 rc
= sqlite3_open(":memory:", &mem_db
);
1634 if (rc
!= SQLITE_OK
) {
1635 printf("Error starting In-Memory database.");
1639 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1640 fd
= open_data_file(schema_files
[i
]);
1645 ret
= read(fd
, buf
, sizeof(buf
));
1646 if (ret
== sizeof(buf
)) {
1647 printf("Schema file too large: %s (limit %zd bytes)",
1648 schema_files
[i
], sizeof(buf
));
1651 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
1652 if (rc
!= SQLITE_OK
) {
1653 fprintf(stderr
, "SQL error #2: %s\n", err
);
1654 fprintf(stderr
, "%s\n", buf
);
1659 void open_smatch_db(void)
1668 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
1669 if (rc
!= SQLITE_OK
) {
1676 static void register_common_funcs(void)
1678 struct token
*token
;
1682 if (option_project
== PROJ_NONE
)
1683 strcpy(filename
, "common_functions");
1685 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
1687 token
= get_tokens_file(filename
);
1690 if (token_type(token
) != TOKEN_STREAMBEGIN
)
1692 token
= token
->next
;
1693 while (token_type(token
) != TOKEN_STREAMEND
) {
1694 if (token_type(token
) != TOKEN_IDENT
)
1696 func
= alloc_string(show_ident(token
->ident
));
1697 add_ptr_list(&common_funcs
, func
);
1698 token
= token
->next
;
1700 clear_token_alloc();
1703 static char *get_next_string(char **str
)
1705 static char string
[256];
1714 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
1719 memcpy(string
, start
, 255);
1721 printf("return_fix: '%s' too long", string
);
1725 memcpy(string
, start
, len
);
1733 static void register_return_replacements(void)
1735 char *func
, *orig
, *new;
1741 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
1742 fd
= open_data_file(filename
);
1745 ret
= read(fd
, buf
, sizeof(buf
));
1749 if (ret
== sizeof(buf
)) {
1750 printf("file too large: %s (limit %zd bytes)",
1751 filename
, sizeof(buf
));
1758 get_next_string(&p
);
1761 if (replace_count
== 0 || replace_count
% 3 != 0) {
1765 replace_table
= malloc(replace_count
* sizeof(char *));
1770 func
= alloc_string(get_next_string(&p
));
1771 orig
= alloc_string(get_next_string(&p
));
1772 new = alloc_string(get_next_string(&p
));
1774 replace_table
[i
++] = func
;
1775 replace_table
[i
++] = orig
;
1776 replace_table
[i
++] = new;
1780 void register_definition_db_callbacks(int id
)
1782 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
1783 add_hook(&global_variable
, BASE_HOOK
);
1784 add_hook(&global_variable
, DECLARATION_HOOK
);
1785 add_split_return_callback(match_return_info
);
1786 add_split_return_callback(print_returned_struct_members
);
1787 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
1788 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
1789 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
1791 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
1792 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
1794 register_common_funcs();
1795 register_return_replacements();
1798 void register_db_call_marker(int id
)
1800 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
1803 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
1805 struct expression
*arg
;
1807 char member_name
[256];
1812 const char *star
= "";
1814 if (expr
->type
!= EXPR_ASSIGNMENT
)
1816 name
= expr_to_var_sym(expr
->left
, sym
);
1819 if (key
[0] == '*') {
1823 if (strncmp(key
, "$", 1) != 0)
1825 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
1827 return alloc_string(member_name
);
1830 while (expr
->type
== EXPR_ASSIGNMENT
)
1831 expr
= strip_expr(expr
->right
);
1832 if (expr
->type
!= EXPR_CALL
)
1835 arg
= get_argument_from_call_expr(expr
->args
, param
);
1839 return get_variable_from_key(arg
, key
, sym
);
1842 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
1850 arg
= strip_expr(arg
);
1852 if (strcmp(key
, "$") == 0)
1853 return expr_to_var_sym(arg
, sym
);
1855 if (strcmp(key
, "*$") == 0) {
1856 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
1857 arg
= strip_expr(arg
->unop
);
1858 return expr_to_var_sym(arg
, sym
);
1860 tmp
= expr_to_var_sym(arg
, sym
);
1863 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
1865 return alloc_string(buf
);
1869 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
1870 arg
= strip_expr(arg
->unop
);
1871 tmp
= expr_to_var_sym(arg
, sym
);
1874 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
1875 return alloc_string(buf
);
1878 tmp
= expr_to_var_sym(arg
, sym
);
1881 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
1883 return alloc_string(buf
);
1886 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
1890 if (strcmp("$", key
) == 0)
1891 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
1892 return get_variable_from_key(arg
, key
, sym
);
1895 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
1899 static char buf
[256];
1901 if (!sym
|| !sym
->ident
)
1904 param_name
= sym
->ident
->name
;
1905 name_len
= strlen(param_name
);
1907 if (strcmp(name
, param_name
) == 0) {
1909 } else if (name
[name_len
] == '-' && /* check for '-' from "->" */
1910 strncmp(name
, param_name
, name_len
) == 0) {
1911 snprintf(buf
, sizeof(buf
), "$%s", name
+ name_len
);
1913 } else if (name
[0] == '*' && strcmp(name
+ 1, param_name
) == 0) {
1919 const char *get_param_name(struct sm_state
*sm
)
1921 return get_param_name_var_sym(sm
->name
, sm
->sym
);
1924 char *get_data_info_name(struct expression
*expr
)
1931 expr
= strip_expr(expr
);
1932 name
= get_member_name(expr
);
1935 name
= expr_to_var_sym(expr
, &sym
);
1938 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
1940 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1941 snprintf(buf
, sizeof(buf
), "static %s", name
);
1943 snprintf(buf
, sizeof(buf
), "global %s", name
);
1944 ret
= alloc_sname(buf
);