2 * Copyright (C) 2010 Dan Carpenter.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
24 #include "smatch_slist.h"
25 #include "smatch_extra.h"
28 static sqlite3
*mem_db
;
32 #define sql_insert_helper(table, ignore, late, values...) \
36 char *err, *p = buf; \
42 p += snprintf(p, buf + sizeof(buf) - p, \
43 "insert %sinto %s values (", \
44 ignore ? "or ignore " : "", #table); \
45 p += snprintf(p, buf + sizeof(buf) - p, values); \
46 p += snprintf(p, buf + sizeof(buf) - p, ");"); \
47 sm_debug("in-mem: %s\n", buf); \
48 rc = sqlite3_exec(mem_db, buf, NULL, NULL, &err); \
49 if (rc != SQLITE_OK) { \
50 fprintf(stderr, "SQL error #2: %s\n", err); \
51 fprintf(stderr, "SQL: '%s'\n", buf); \
57 FILE *tmp_fd = sm_outfd; \
58 sm_outfd = sql_outfd; \
60 sm_printf("SQL%s: insert %sinto " #table " values(", \
61 late ? "_late" : "", ignore ? "or ignore " : ""); \
68 #define sql_insert(table, values...) sql_insert_helper(table, 0, 0, values);
69 #define sql_insert_or_ignore(table, values...) sql_insert_helper(table, 1, 0, values);
70 #define sql_insert_late(table, values...) sql_insert_helper(table, 0, 1, values);
74 void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
);
76 ALLOCATOR(def_callback
, "definition db hook callbacks");
77 DECLARE_PTR_LIST(callback_list
, struct def_callback
);
78 static struct callback_list
*select_caller_info_callbacks
;
80 struct member_info_callback
{
82 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
);
84 ALLOCATOR(member_info_callback
, "caller_info callbacks");
85 DECLARE_PTR_LIST(member_info_cb_list
, struct member_info_callback
);
86 static struct member_info_cb_list
*member_callbacks
;
88 struct returned_state_callback
{
89 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*return_expr
);
91 ALLOCATOR(returned_state_callback
, "returned state callbacks");
92 DECLARE_PTR_LIST(returned_state_cb_list
, struct returned_state_callback
);
93 static struct returned_state_cb_list
*returned_state_callbacks
;
95 struct returned_member_callback
{
97 void (*callback
)(int return_id
, char *return_ranges
, struct expression
*expr
, char *printed_name
, struct smatch_state
*state
);
99 ALLOCATOR(returned_member_callback
, "returned member callbacks");
100 DECLARE_PTR_LIST(returned_member_cb_list
, struct returned_member_callback
);
101 static struct returned_member_cb_list
*returned_member_callbacks
;
103 struct call_implies_callback
{
105 void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
);
107 ALLOCATOR(call_implies_callback
, "call_implies callbacks");
108 DECLARE_PTR_LIST(call_implies_cb_list
, struct call_implies_callback
);
109 static struct call_implies_cb_list
*call_implies_cb_list
;
111 static int print_sql_output(void *unused
, int argc
, char **argv
, char **azColName
)
115 for (i
= 0; i
< argc
; i
++) {
118 sm_printf("%s", argv
[i
]);
124 void debug_sql(const char *sql
)
129 sql_exec(print_sql_output
, NULL
, sql
);
132 void debug_mem_sql(const char *sql
)
137 sql_mem_exec(print_sql_output
, NULL
, sql
);
140 void sql_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
145 if (option_no_db
|| !db
)
148 rc
= sqlite3_exec(db
, sql
, callback
, data
, &err
);
149 if (rc
!= SQLITE_OK
&& !parse_error
) {
150 fprintf(stderr
, "SQL error #2: %s\n", err
);
151 fprintf(stderr
, "SQL: '%s'\n", sql
);
156 void sql_mem_exec(int (*callback
)(void*, int, char**, char**), void *data
, const char *sql
)
164 rc
= sqlite3_exec(mem_db
, sql
, callback
, data
, &err
);
165 if (rc
!= SQLITE_OK
) {
166 fprintf(stderr
, "SQL error #2: %s\n", err
);
167 fprintf(stderr
, "SQL: '%s'\n", sql
);
172 static int replace_count
;
173 static char **replace_table
;
174 static const char *replace_return_ranges(const char *return_ranges
)
178 if (!get_function()) {
179 /* I have no idea why EXPORT_SYMBOL() is here */
180 return return_ranges
;
182 for (i
= 0; i
< replace_count
; i
+= 3) {
183 if (strcmp(replace_table
[i
+ 0], get_function()) == 0) {
184 if (strcmp(replace_table
[i
+ 1], return_ranges
) == 0)
185 return replace_table
[i
+ 2];
188 return return_ranges
;
191 void sql_insert_return_states(int return_id
, const char *return_ranges
,
192 int type
, int param
, const char *key
, const char *value
)
194 if (key
&& strlen(key
) >= 80)
196 return_ranges
= replace_return_ranges(return_ranges
);
197 sql_insert(return_states
, "'%s', '%s', %lu, %d, '%s', %d, %d, %d, '%s', '%s'",
198 get_base_file(), get_function(), (unsigned long)__inline_fn
,
199 return_id
, return_ranges
, fn_static(), type
, param
, key
, value
);
202 static struct string_list
*common_funcs
;
203 static int is_common_function(const char *fn
)
210 if (strncmp(fn
, "__builtin_", 10) == 0)
213 FOR_EACH_PTR(common_funcs
, tmp
) {
214 if (strcmp(tmp
, fn
) == 0)
216 } END_FOR_EACH_PTR(tmp
);
221 static char *function_signature(void)
223 return type_to_str(get_real_base_type(cur_func_sym
));
226 void sql_insert_caller_info(struct expression
*call
, int type
,
227 int param
, const char *key
, const char *value
)
229 FILE *tmp_fd
= sm_outfd
;
232 if (!option_info
&& !__inline_call
)
235 if (key
&& strlen(key
) >= 80)
238 fn
= get_fnptr_name(call
->fn
);
244 "insert into caller_info values ('%s', '%s', '%s', %lu, %d, %d, %d, '%s', '%s');",
245 get_base_file(), get_function(), fn
, (unsigned long)call
,
246 is_static(call
->fn
), type
, param
, key
, value
);
252 if (strncmp(fn
, "__builtin_", 10) == 0)
254 if (type
!= INTERNAL
&& is_common_function(fn
))
257 sm_outfd
= caller_info_fd
;
258 sm_msg("SQL_caller_info: insert into caller_info values ("
259 "'%s', '%s', '%s', %%CALL_ID%%, %d, %d, %d, '%s', '%s');",
260 get_base_file(), get_function(), fn
, is_static(call
->fn
),
261 type
, param
, key
, value
);
267 void sql_insert_function_ptr(const char *fn
, const char *struct_name
)
269 sql_insert(function_ptr
, "'%s', '%s', '%s', 0", get_base_file(), fn
,
273 void sql_insert_call_implies(int type
, int param
, const char *key
, const char *value
)
275 sql_insert(call_implies
, "'%s', '%s', %lu, %d, %d, %d, '%s', '%s'", get_base_file(),
276 get_function(), (unsigned long)__inline_fn
, fn_static(),
277 type
, param
, key
, value
);
280 void sql_insert_function_type_size(const char *member
, const char *ranges
)
282 sql_insert(function_type_size
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), member
, ranges
);
285 void sql_insert_local_values(const char *name
, const char *value
)
287 sql_insert(local_values
, "'%s', '%s', '%s'", get_base_file(), name
, value
);
290 void sql_insert_function_type_value(const char *type
, const char *value
)
292 sql_insert(function_type_value
, "'%s', '%s', '%s', '%s'", get_base_file(), get_function(), type
, value
);
295 void sql_insert_function_type(int param
, const char *value
)
297 sql_insert(function_type
, "'%s', '%s', %d, %d, '%s'",
298 get_base_file(), get_function(), fn_static(), param
, value
);
301 void sql_insert_parameter_name(int param
, const char *value
)
303 sql_insert(parameter_name
, "'%s', '%s', %d, %d, '%s'",
304 get_base_file(), get_function(), fn_static(), param
, value
);
307 void sql_insert_data_info(struct expression
*data
, int type
, const char *value
)
311 data_name
= get_data_info_name(data
);
314 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
315 is_static(data
) ? get_base_file() : "extern",
316 data_name
, type
, value
);
319 void sql_insert_data_info_var_sym(const char *var
, struct symbol
*sym
, int type
, const char *value
)
321 sql_insert(data_info
, "'%s', '%s', %d, '%s'",
322 (sym
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
326 void sql_save_constraint(const char *con
)
331 sm_msg("SQL: insert or ignore into constraints (str) values('%s');", con
);
334 void sql_save_constraint_required(const char *data
, int op
, const char *limit
)
336 sql_insert_or_ignore(constraints_required
, "'%s', '%s', '%s'", data
, show_special(op
), limit
);
339 void sql_copy_constraint_required(const char *new_limit
, const char *old_limit
)
344 sm_msg("SQL_late: insert or ignore into constraints_required (data, op, bound) "
345 "select constraints_required.data, constraints_required.op, '%s' from "
346 "constraints_required where bound = '%s';", new_limit
, old_limit
);
349 void sql_insert_fn_ptr_data_link(const char *ptr
, const char *data
)
351 sql_insert_or_ignore(fn_ptr_data_link
, "'%s', '%s'", ptr
, data
);
354 void sql_insert_fn_data_link(struct expression
*fn
, int type
, int param
, const char *key
, const char *value
)
356 if (fn
->type
!= EXPR_SYMBOL
|| !fn
->symbol
->ident
)
359 sql_insert(fn_data_link
, "'%s', '%s', %d, %d, %d, '%s', '%s'",
360 (fn
->symbol
->ctype
.modifiers
& MOD_STATIC
) ? get_base_file() : "extern",
361 fn
->symbol
->ident
->name
,
362 !!(fn
->symbol
->ctype
.modifiers
& MOD_STATIC
),
363 type
, param
, key
, value
);
366 void sql_insert_mtag_about(mtag_t tag
, const char *left_name
, const char *right_name
)
368 sql_insert(mtag_about
, "%lld, '%s', '%s', %d, '%s', '%s'",
369 tag
, get_filename(), get_function(), get_lineno(), left_name
, right_name
);
372 void sql_insert_mtag_data(mtag_t tag
, const char *var
, int offset
, int type
, const char *value
)
374 sql_insert(mtag_data
, "%lld, '%s', %d, %d, '%s'", tag
, var
, offset
, type
, value
);
377 void sql_insert_mtag_map(mtag_t tag
, int offset
, mtag_t container
)
379 sql_insert(mtag_map
, "%lld, %d, %lld", tag
, offset
, container
);
382 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
387 *tag
= strtoll(argv
[0], NULL
, 10);
394 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
)
398 run_sql(save_mtag
, &tmp
,
399 "select container from mtag_map where tag = %lld and offset = %d;",
402 if (tmp
== 0 || tmp
== -1ULL)
408 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
412 run_sql(save_mtag
, &tmp
,
413 "select tag from mtag_map where container = %lld and offset = %d;",
416 if (tmp
== 0 || tmp
== -1ULL)
422 char *get_static_filter(struct symbol
*sym
)
424 static char sql_filter
[1024];
426 /* This can only happen on buggy code. Return invalid SQL. */
428 sql_filter
[0] = '\0';
432 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
433 snprintf(sql_filter
, sizeof(sql_filter
),
434 "file = '%s' and function = '%s' and static = '1'",
435 get_base_file(), sym
->ident
->name
);
437 snprintf(sql_filter
, sizeof(sql_filter
),
438 "function = '%s' and static = '0'", sym
->ident
->name
);
444 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
446 int *row_count
= _row_count
;
451 *row_count
= atoi(argv
[0]);
455 static void mark_params_untracked(struct expression
*call
)
457 struct expression
*arg
;
460 FOR_EACH_PTR(call
->args
, arg
) {
461 mark_untracked(call
, i
++, "$", NULL
);
462 } END_FOR_EACH_PTR(arg
);
465 static void sql_select_return_states_pointer(const char *cols
,
466 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
469 int return_count
= 0;
471 ptr
= get_fnptr_name(call
->fn
);
475 run_sql(get_row_count
, &return_count
,
476 "select count(*) from return_states join function_ptr "
477 "where return_states.function == function_ptr.function and "
478 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
479 /* The magic number 100 is just from testing on the kernel. */
480 if (return_count
> 100) {
481 mark_params_untracked(call
);
485 run_sql(callback
, info
,
486 "select %s from return_states join function_ptr where "
487 "return_states.function == function_ptr.function and ptr = '%s' "
488 "and searchable = 1 "
489 "order by function_ptr.file, return_states.file, return_id, type;",
493 static int is_local_symbol(struct expression
*expr
)
495 if (expr
->type
!= EXPR_SYMBOL
)
497 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
502 void sql_select_return_states(const char *cols
, struct expression
*call
,
503 int (*callback
)(void*, int, char**, char**), void *info
)
507 if (is_fake_call(call
))
510 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
511 sql_select_return_states_pointer(cols
, call
, callback
, info
);
515 if (inlinable(call
->fn
)) {
516 mem_sql(callback
, info
,
517 "select %s from return_states where call_id = '%lu' order by return_id, type;",
518 cols
, (unsigned long)call
);
522 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
523 get_static_filter(call
->fn
->symbol
));
524 if (row_count
> 3000)
527 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
528 cols
, get_static_filter(call
->fn
->symbol
));
531 void sql_select_call_implies(const char *cols
, struct expression
*call
,
532 int (*callback
)(void*, int, char**, char**))
534 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
537 if (inlinable(call
->fn
)) {
538 mem_sql(callback
, call
,
539 "select %s from call_implies where call_id = '%lu';",
540 cols
, (unsigned long)call
);
544 run_sql(callback
, call
, "select %s from call_implies where %s;",
545 cols
, get_static_filter(call
->fn
->symbol
));
548 struct select_caller_info_data
{
549 struct stree
*final_states
;
550 struct timeval start_time
;
556 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
558 static void sql_select_caller_info(struct select_caller_info_data
*data
,
559 const char *cols
, struct symbol
*sym
)
562 mem_sql(caller_info_callback
, data
,
563 "select %s from caller_info where call_id = %lu;",
564 cols
, (unsigned long)__inline_fn
);
568 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
570 run_sql(caller_info_callback
, data
,
571 "select %s from common_caller_info where %s order by call_id;",
572 cols
, get_static_filter(sym
));
576 run_sql(caller_info_callback
, data
,
577 "select %s from caller_info where %s order by call_id;",
578 cols
, get_static_filter(sym
));
581 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
583 struct def_callback
*def_callback
= __alloc_def_callback(0);
585 def_callback
->hook_type
= type
;
586 def_callback
->callback
= callback
;
587 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
591 * These call backs are used when the --info option is turned on to print struct
592 * member information. For example foo->bar could have a state in
593 * smatch_extra.c and also check_user.c.
595 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
597 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
599 member_callback
->owner
= owner
;
600 member_callback
->callback
= callback
;
601 add_ptr_list(&member_callbacks
, member_callback
);
604 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
606 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
608 callback
->callback
= fn
;
609 add_ptr_list(&returned_state_callbacks
, callback
);
612 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
))
614 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
616 member_callback
->owner
= owner
;
617 member_callback
->callback
= callback
;
618 add_ptr_list(&returned_member_callbacks
, member_callback
);
621 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
623 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
626 cb
->callback
= callback
;
627 add_ptr_list(&call_implies_cb_list
, cb
);
631 struct expression
*static_returns_call
;
632 struct symbol
*return_type
;
633 struct range_list
*return_range_list
;
636 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
638 struct return_info
*ret_info
= _ret_info
;
639 struct range_list
*rl
;
640 struct expression
*call_expr
= ret_info
->static_returns_call
;
644 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
645 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
649 struct range_list
*db_return_vals(struct expression
*expr
)
651 struct return_info ret_info
= {};
655 if (is_fake_call(expr
))
658 snprintf(buf
, sizeof(buf
), "return %p", expr
);
659 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
661 return clone_rl(estate_rl(sm
->state
));
662 ret_info
.static_returns_call
= expr
;
663 ret_info
.return_type
= get_type(expr
);
664 if (!ret_info
.return_type
)
667 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
670 ret_info
.return_range_list
= NULL
;
671 if (inlinable(expr
->fn
)) {
672 mem_sql(db_return_callback
, &ret_info
,
673 "select distinct return from return_states where call_id = '%lu';",
674 (unsigned long)expr
);
676 run_sql(db_return_callback
, &ret_info
,
677 "select distinct return from return_states where %s;",
678 get_static_filter(expr
->fn
->symbol
));
680 return ret_info
.return_range_list
;
683 struct range_list
*db_return_vals_from_str(const char *fn_name
)
685 struct return_info ret_info
;
687 ret_info
.static_returns_call
= NULL
;
688 ret_info
.return_type
= &llong_ctype
;
689 ret_info
.return_range_list
= NULL
;
691 run_sql(db_return_callback
, &ret_info
,
692 "select distinct return from return_states where function = '%s';",
694 return ret_info
.return_range_list
;
697 static void match_call_marker(struct expression
*expr
)
701 type
= get_type(expr
->fn
);
702 if (type
&& type
->type
== SYM_PTR
)
703 type
= get_real_base_type(type
);
706 * we just want to record something in the database so that if we have
707 * two calls like: frob(4); frob(some_unkown); then on the receiving
708 * side we know that sometimes frob is called with unknown parameters.
711 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
714 static char *show_offset(int offset
)
720 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
724 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
725 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
731 char printed_name
[256];
734 expr
= strip_expr(expr
);
737 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
738 expr
= strip_expr(expr
->unop
);
742 name
= expr_to_var_sym(expr
, &sym
);
747 FOR_EACH_SM(stree
, sm
) {
750 if (strcmp(name
, sm
->name
) == 0) {
752 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
753 else /* these are already handled. fixme: handle them here */
755 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
756 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
757 } else if (strncmp(name
, sm
->name
, len
) == 0) {
758 if (isalnum(sm
->name
[len
]))
761 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
763 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
767 callback(call
, param
, printed_name
, sm
);
768 } END_FOR_EACH_SM(sm
);
773 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
775 char **container
= _container
;
776 static char buf
[256];
778 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
783 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
784 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
786 struct expression
*tmp
;
787 char *container
= NULL
;
792 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
)
796 * We can't use the in-mem DB because we have to parse the function
797 * first, then we know if it takes a container, then we know to pass it
798 * the container data.
801 run_sql(¶m_used_callback
, &container
,
802 "select key from call_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
803 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
807 p
= strchr(container
, '-');
816 tmp
= get_assigned_expr(expr
);
820 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
822 expr
= strip_expr(expr
->unop
);
823 holder_offset
= get_member_offset_from_deref(expr
);
824 if (-holder_offset
!= offset
)
827 expr
= strip_expr(expr
->deref
);
828 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
829 expr
= strip_expr(expr
->unop
);
831 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
834 static void match_call_info(struct expression
*call
)
836 struct member_info_callback
*cb
;
837 struct expression
*arg
;
842 name
= get_fnptr_name(call
->fn
);
846 FOR_EACH_PTR(member_callbacks
, cb
) {
847 stree
= get_all_states_stree(cb
->owner
);
849 FOR_EACH_PTR(call
->args
, arg
) {
850 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
851 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
853 } END_FOR_EACH_PTR(arg
);
855 } END_FOR_EACH_PTR(cb
);
860 static int get_param(int param
, char **name
, struct symbol
**sym
)
866 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
868 * this is a temporary hack to work around a bug (I think in sparse?)
869 * 2.6.37-rc1:fs/reiserfs/journal.o
870 * If there is a function definition without parameter name found
871 * after a function implementation then it causes a crash.
875 if (arg
->ident
->name
< (char *)100)
878 *name
= arg
->ident
->name
;
883 } END_FOR_EACH_PTR(arg
);
888 static int function_signature_matches(const char *sig
)
892 my_sig
= function_signature();
894 return 1; /* default to matching */
895 if (strcmp(my_sig
, sig
) == 0)
900 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
902 struct select_caller_info_data
*data
= _data
;
909 struct symbol
*sym
= NULL
;
910 struct def_callback
*def_callback
;
912 struct timeval cur_time
;
919 gettimeofday(&cur_time
, NULL
);
920 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
923 func_id
= atoi(argv
[0]);
925 type
= strtol(argv
[1], NULL
, 10);
926 param
= strtol(argv
[2], NULL
, 10);
932 if (data
->prev_func_id
== -1)
933 data
->prev_func_id
= func_id
;
934 if (func_id
!= data
->prev_func_id
) {
935 stree
= __pop_fake_cur_stree();
937 merge_stree(&data
->final_states
, stree
);
939 __push_fake_cur_stree();
941 data
->prev_func_id
= func_id
;
947 if (type
== INTERNAL
&&
948 !function_signature_matches(value
)) {
953 if (param
>= 0 && !get_param(param
, &name
, &sym
))
956 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
957 if (def_callback
->hook_type
== type
)
958 def_callback
->callback(name
, sym
, key
, value
);
959 } END_FOR_EACH_PTR(def_callback
);
964 static struct string_list
*ptr_names_done
;
965 static struct string_list
*ptr_names
;
967 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
969 insert_string(&ptr_names
, alloc_string(argv
[0]));
973 static char *get_next_ptr_name(void)
977 FOR_EACH_PTR(ptr_names
, ptr
) {
978 if (list_has_string(ptr_names_done
, ptr
))
980 insert_string(&ptr_names_done
, ptr
);
982 } END_FOR_EACH_PTR(ptr
);
986 static void get_ptr_names(const char *file
, const char *name
)
988 char sql_filter
[1024];
992 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
995 snprintf(sql_filter
, 1024, "function = '%s';", name
);
998 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
1000 run_sql(get_ptr_name
, NULL
,
1001 "select distinct ptr from function_ptr where %s",
1004 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1005 if (before
== after
)
1008 while ((name
= get_next_ptr_name()))
1009 get_ptr_names(NULL
, name
);
1012 static void match_data_from_db(struct symbol
*sym
)
1014 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1015 struct sm_state
*sm
;
1016 struct stree
*stree
;
1017 struct timeval end_time
;
1019 if (!sym
|| !sym
->ident
)
1022 gettimeofday(&data
.start_time
, NULL
);
1024 __push_fake_cur_stree();
1030 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1031 get_ptr_names(get_base_file(), sym
->ident
->name
);
1033 get_ptr_names(NULL
, sym
->ident
->name
);
1035 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1036 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1037 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1038 stree
= __pop_fake_cur_stree();
1043 sql_select_caller_info(&data
,
1044 "call_id, type, parameter, key, value",
1048 stree
= __pop_fake_cur_stree();
1050 merge_stree(&data
.final_states
, stree
);
1052 __push_fake_cur_stree();
1054 data
.prev_func_id
= -1;
1057 FOR_EACH_PTR(ptr_names
, ptr
) {
1058 run_sql(caller_info_callback
, &data
,
1059 "select call_id, type, parameter, key, value"
1060 " from common_caller_info where function = '%s' order by call_id",
1062 } END_FOR_EACH_PTR(ptr
);
1065 FOR_EACH_PTR(ptr_names
, ptr
) {
1067 } END_FOR_EACH_PTR(ptr
);
1068 goto free_ptr_names
;
1071 FOR_EACH_PTR(ptr_names
, ptr
) {
1072 run_sql(caller_info_callback
, &data
,
1073 "select call_id, type, parameter, key, value"
1074 " from caller_info where function = '%s' order by call_id",
1077 } END_FOR_EACH_PTR(ptr
);
1080 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1081 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1083 sql_select_caller_info(&data
,
1084 "call_id, type, parameter, key, value",
1088 stree
= __pop_fake_cur_stree();
1090 merge_stree(&data
.final_states
, stree
);
1093 gettimeofday(&end_time
, NULL
);
1094 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1095 FOR_EACH_SM(data
.final_states
, sm
) {
1097 } END_FOR_EACH_SM(sm
);
1100 free_stree(&data
.final_states
);
1103 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1105 struct expression
*call_expr
= _call
;
1106 struct call_implies_callback
*cb
;
1107 struct expression
*arg
= NULL
;
1114 type
= atoi(argv
[1]);
1115 param
= atoi(argv
[2]);
1117 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
1118 if (cb
->type
!= type
)
1121 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1125 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1126 } END_FOR_EACH_PTR(cb
);
1131 static void match_call_implies(struct expression
*expr
)
1133 sql_select_call_implies("function, type, parameter, key, value", expr
,
1134 call_implies_callbacks
);
1137 static void print_initializer_list(struct expression_list
*expr_list
,
1138 struct symbol
*struct_type
)
1140 struct expression
*expr
;
1141 struct symbol
*base_type
;
1142 char struct_name
[256];
1144 FOR_EACH_PTR(expr_list
, expr
) {
1145 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1146 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1149 if (expr
->type
!= EXPR_IDENTIFIER
)
1151 if (!expr
->expr_ident
)
1153 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1155 base_type
= get_type(expr
->ident_expression
);
1156 if (!base_type
|| base_type
->type
!= SYM_FN
)
1158 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1159 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1160 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1162 } END_FOR_EACH_PTR(expr
);
1165 static void global_variable(struct symbol
*sym
)
1167 struct symbol
*struct_type
;
1171 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1173 struct_type
= get_base_type(sym
);
1176 if (struct_type
->type
== SYM_ARRAY
) {
1177 struct_type
= get_base_type(struct_type
);
1181 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1183 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1186 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1188 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1191 static void call_return_state_hooks_conditional(struct expression
*expr
)
1193 struct returned_state_callback
*cb
;
1194 struct range_list
*rl
;
1195 char *return_ranges
;
1196 int final_pass_orig
= final_pass
;
1198 __push_fake_cur_stree();
1201 __split_whole_condition(expr
->conditional
);
1202 final_pass
= final_pass_orig
;
1204 if (get_implied_rl(expr
->cond_true
, &rl
))
1205 rl
= cast_rl(cur_func_return_type(), rl
);
1207 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1208 return_ranges
= show_rl(rl
);
1209 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1212 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1213 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1214 } END_FOR_EACH_PTR(cb
);
1216 __push_true_states();
1217 __use_false_states();
1219 if (get_implied_rl(expr
->cond_false
, &rl
))
1220 rl
= cast_rl(cur_func_return_type(), rl
);
1222 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1223 return_ranges
= show_rl(rl
);
1224 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1227 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1228 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1229 } END_FOR_EACH_PTR(cb
);
1231 __merge_true_states();
1232 __free_fake_cur_stree();
1235 static void call_return_state_hooks_compare(struct expression
*expr
)
1237 struct returned_state_callback
*cb
;
1238 char *return_ranges
;
1239 int final_pass_orig
= final_pass
;
1240 sval_t sval
= { .type
= &int_ctype
};
1243 if (!get_implied_value(expr
, &ret
))
1246 __push_fake_cur_stree();
1249 __split_whole_condition(expr
);
1250 final_pass
= final_pass_orig
;
1252 if (ret
.value
!= 0) {
1253 return_ranges
= alloc_sname("1");
1255 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1258 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1259 cb
->callback(return_id
, return_ranges
, expr
);
1260 } END_FOR_EACH_PTR(cb
);
1263 __push_true_states();
1264 __use_false_states();
1266 if (ret
.value
!= 1) {
1267 return_ranges
= alloc_sname("0");
1269 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1272 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1273 cb
->callback(return_id
, return_ranges
, expr
);
1274 } END_FOR_EACH_PTR(cb
);
1277 __merge_true_states();
1278 __free_fake_cur_stree();
1281 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1283 struct sm_state
*tmp
;
1285 FOR_EACH_PTR(slist
, tmp
) {
1286 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1288 } END_FOR_EACH_PTR(tmp
);
1293 static char *get_return_compare_str(struct expression
*expr
)
1301 compare_str
= expr_lte_to_param(expr
, -1);
1304 param
= get_param_num(expr
);
1308 var
= expr_to_var(expr
);
1311 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1312 comparison
= get_comparison_strings(var
, buf
);
1318 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1319 return alloc_sname(buf
);
1322 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1324 struct returned_state_callback
*cb
;
1325 struct range_list
*rl
;
1326 char *return_ranges
;
1327 struct sm_state
*tmp
;
1329 int nr_possible
, nr_states
;
1330 char *compare_str
= NULL
;
1332 struct state_list
*already_handled
= NULL
;
1334 if (!sm
|| !sm
->merged
)
1337 if (too_many_possible(sm
))
1340 /* bail if it gets too complicated */
1341 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1342 nr_states
= stree_count(__get_cur_stree());
1343 if (nr_states
* nr_possible
>= 2000)
1346 FOR_EACH_PTR(sm
->possible
, tmp
) {
1349 if (ptr_in_list(tmp
, already_handled
))
1351 add_ptr_list(&already_handled
, tmp
);
1354 __push_fake_cur_stree();
1356 overwrite_states_using_pool(sm
, tmp
);
1358 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1359 return_ranges
= show_rl(rl
);
1360 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1361 compare_str
= get_return_compare_str(expr
);
1363 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1364 return_ranges
= alloc_sname(buf
);
1368 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1369 cb
->callback(return_id
, return_ranges
, expr
);
1370 } END_FOR_EACH_PTR(cb
);
1372 __free_fake_cur_stree();
1373 } END_FOR_EACH_PTR(tmp
);
1375 free_slist(&already_handled
);
1380 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1382 struct sm_state
*sm
;
1384 if (!expr
|| expr_equal_to_param(expr
, -1))
1387 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1388 return split_possible_helper(sm
, expr
);
1391 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1393 struct range_list
*rl
;
1394 char *return_ranges
;
1403 return alloc_sname("");
1405 if (get_implied_value(expr
, &sval
)) {
1406 sval
= sval_cast(cur_func_return_type(), sval
);
1407 *rl_p
= alloc_rl(sval
, sval
);
1408 return sval_to_str(sval
);
1411 compare_str
= expr_equal_to_param(expr
, -1);
1412 math_str
= get_value_in_terms_of_parameter_math(expr
);
1414 if (get_implied_rl(expr
, &rl
)) {
1415 rl
= cast_rl(cur_func_return_type(), rl
);
1416 return_ranges
= show_rl(rl
);
1417 } else if (get_imaginary_absolute(expr
, &rl
)){
1418 rl
= cast_rl(cur_func_return_type(), rl
);
1419 return alloc_sname(show_rl(rl
));
1421 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1422 return_ranges
= show_rl(rl
);
1427 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1428 return alloc_sname(buf
);
1431 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1432 return alloc_sname(buf
);
1434 compare_str
= get_return_compare_str(expr
);
1436 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1437 return alloc_sname(buf
);
1440 return return_ranges
;
1443 static int split_positive_from_negative(struct expression
*expr
)
1445 struct returned_state_callback
*cb
;
1446 struct range_list
*rl
;
1447 const char *return_ranges
;
1448 struct range_list
*ret_rl
;
1451 /* We're going to print the states 3 times */
1452 if (stree_count(__get_cur_stree()) > 10000 / 3)
1455 if (!get_implied_rl(expr
, &rl
) || !rl
)
1457 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1459 /* Forget about INT_MAX and larger */
1460 if (rl_max(rl
).value
<= 0)
1462 if (!sval_is_negative(rl_min(rl
)))
1465 if (!assume(compare_expression(expr
, '>', zero_expr())))
1469 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1470 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1471 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1472 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1473 } END_FOR_EACH_PTR(cb
);
1477 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1478 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1481 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1482 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1483 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1484 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1485 } END_FOR_EACH_PTR(cb
);
1491 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1494 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1495 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1496 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1497 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1498 } END_FOR_EACH_PTR(cb
);
1506 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1508 struct returned_state_callback
*cb
;
1509 struct range_list
*rl
;
1510 struct range_list
*nonnull_rl
;
1512 struct range_list
*null_rl
= NULL
;
1513 char *return_ranges
;
1514 struct sm_state
*sm
;
1515 struct smatch_state
*state
;
1517 int final_pass_orig
= final_pass
;
1519 if (!expr
|| expr_equal_to_param(expr
, -1))
1521 if (expr
->type
== EXPR_CALL
)
1523 if (!is_pointer(expr
))
1526 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1529 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1532 if (!estate_rl(state
))
1534 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1536 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1539 nr_states
= stree_count(__get_cur_stree());
1540 if (option_info
&& nr_states
>= 1500)
1543 rl
= estate_rl(state
);
1545 __push_fake_cur_stree();
1548 __split_whole_condition(expr
);
1549 final_pass
= final_pass_orig
;
1551 nonnull_rl
= rl_filter(rl
, rl_zero());
1552 return_ranges
= show_rl(nonnull_rl
);
1553 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1556 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1557 cb
->callback(return_id
, return_ranges
, expr
);
1558 } END_FOR_EACH_PTR(cb
);
1560 __push_true_states();
1561 __use_false_states();
1563 return_ranges
= alloc_sname("0");
1564 null_sval
= sval_type_val(rl_type(rl
), 0);
1565 add_range(&null_rl
, null_sval
, null_sval
);
1566 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1568 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1569 cb
->callback(return_id
, return_ranges
, expr
);
1570 } END_FOR_EACH_PTR(cb
);
1572 __merge_true_states();
1573 __free_fake_cur_stree();
1578 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1580 struct range_list
*rl
;
1581 struct range_list
*nonzero_rl
;
1583 struct range_list
*zero_rl
= NULL
;
1585 struct returned_state_callback
*cb
;
1586 char *return_ranges
;
1587 int final_pass_orig
= final_pass
;
1590 if (option_project
!= PROJ_KERNEL
)
1593 nr_states
= stree_count(__get_cur_stree());
1594 if (nr_states
> 1500)
1597 if (get_value(expr
, &val
))
1599 if (!get_implied_rl(expr
, &rl
))
1601 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1603 if (rl_max(rl
).value
!= 0)
1606 __push_fake_cur_stree();
1609 __split_whole_condition(expr
);
1610 final_pass
= final_pass_orig
;
1612 nonzero_rl
= rl_filter(rl
, rl_zero());
1613 return_ranges
= show_rl(nonzero_rl
);
1614 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1617 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1618 cb
->callback(return_id
, return_ranges
, expr
);
1619 } END_FOR_EACH_PTR(cb
);
1621 __push_true_states();
1622 __use_false_states();
1624 return_ranges
= alloc_sname("0");
1625 zero_sval
= sval_type_val(rl_type(rl
), 0);
1626 add_range(&zero_rl
, zero_sval
, zero_sval
);
1627 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1629 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1630 cb
->callback(return_id
, return_ranges
, expr
);
1631 } END_FOR_EACH_PTR(cb
);
1633 __merge_true_states();
1634 __free_fake_cur_stree();
1639 static int is_boolean(struct expression
*expr
)
1641 struct range_list
*rl
;
1643 if (!get_implied_rl(expr
, &rl
))
1645 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1650 static int is_conditional(struct expression
*expr
)
1654 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1659 static int splitable_function_call(struct expression
*expr
)
1661 struct sm_state
*sm
;
1664 if (!expr
|| expr
->type
!= EXPR_CALL
)
1666 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1667 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1668 return split_possible_helper(sm
, expr
);
1671 static struct sm_state
*find_bool_param(void)
1673 struct stree
*start_states
;
1675 struct sm_state
*sm
, *tmp
;
1678 start_states
= get_start_states();
1680 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1683 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1686 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1687 rl_max(estate_rl(sm
->state
)).value
!= 1)
1690 } END_FOR_EACH_PTR_REVERSE(arg
);
1696 * Check if it's splitable. If not, then splitting it up is likely not
1697 * useful for the callers.
1699 FOR_EACH_PTR(sm
->possible
, tmp
) {
1702 if (!estate_get_single_value(tmp
->state
, &sval
))
1704 } END_FOR_EACH_PTR(tmp
);
1709 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1711 struct returned_state_callback
*cb
;
1712 struct range_list
*ret_rl
;
1713 const char *return_ranges
;
1714 struct sm_state
*tmp
;
1716 int nr_possible
, nr_states
;
1717 char *compare_str
= NULL
;
1719 struct state_list
*already_handled
= NULL
;
1721 if (!sm
|| !sm
->merged
)
1724 if (too_many_possible(sm
))
1727 /* bail if it gets too complicated */
1728 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1729 nr_states
= stree_count(__get_cur_stree());
1730 if (nr_states
* nr_possible
>= 2000)
1733 FOR_EACH_PTR(sm
->possible
, tmp
) {
1736 if (ptr_in_list(tmp
, already_handled
))
1738 add_ptr_list(&already_handled
, tmp
);
1741 __push_fake_cur_stree();
1743 overwrite_states_using_pool(sm
, tmp
);
1745 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1746 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1747 compare_str
= get_return_compare_str(expr
);
1749 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1750 return_ranges
= alloc_sname(buf
);
1754 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1755 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1756 } END_FOR_EACH_PTR(cb
);
1758 __free_fake_cur_stree();
1759 } END_FOR_EACH_PTR(tmp
);
1761 free_slist(&already_handled
);
1766 static int split_by_bool_param(struct expression
*expr
)
1768 struct sm_state
*start_sm
, *sm
;
1771 start_sm
= find_bool_param();
1774 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1775 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1777 return split_on_bool_sm(sm
, expr
);
1780 static int split_by_null_nonnull_param(struct expression
*expr
)
1783 struct sm_state
*sm
;
1785 .type
= &ulong_ctype
,
1788 /* function must only take one pointer */
1789 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1791 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1794 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1797 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1799 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1803 if (!rl_has_sval(estate_rl(sm
->state
), zero
))
1806 return split_on_bool_sm(sm
, expr
);
1809 struct expression
*strip_expr_statement(struct expression
*expr
)
1811 struct expression
*orig
= expr
;
1812 struct statement
*stmt
, *last_stmt
;
1816 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1818 if (expr
->type
!= EXPR_STATEMENT
)
1820 stmt
= expr
->statement
;
1821 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1824 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1825 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1826 last_stmt
= last_stmt
->label_statement
;
1827 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1829 return strip_expr(last_stmt
->expression
);
1832 static void call_return_state_hooks(struct expression
*expr
)
1834 struct returned_state_callback
*cb
;
1835 struct range_list
*ret_rl
;
1836 const char *return_ranges
;
1840 if (__path_is_null())
1843 expr
= strip_expr(expr
);
1844 expr
= strip_expr_statement(expr
);
1846 if (is_impossible_path())
1849 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1850 !get_implied_value(expr
, &sval
)) &&
1851 (is_condition(expr
) || is_boolean(expr
))) {
1852 call_return_state_hooks_compare(expr
);
1854 } else if (is_conditional(expr
)) {
1855 call_return_state_hooks_conditional(expr
);
1857 } else if (call_return_state_hooks_split_possible(expr
)) {
1859 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1861 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1863 } else if (splitable_function_call(expr
)) {
1865 } else if (split_positive_from_negative(expr
)) {
1867 } else if (split_by_bool_param(expr
)) {
1868 } else if (split_by_null_nonnull_param(expr
)) {
1873 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1874 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1877 nr_states
= stree_count(__get_cur_stree());
1878 if (nr_states
>= 10000) {
1879 match_return_info(return_id
, (char *)return_ranges
, expr
);
1882 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1883 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1884 } END_FOR_EACH_PTR(cb
);
1887 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1889 struct returned_member_callback
*cb
;
1890 struct stree
*stree
;
1891 struct sm_state
*sm
;
1892 struct symbol
*type
;
1894 char member_name
[256];
1897 type
= get_type(expr
);
1898 if (!type
|| type
->type
!= SYM_PTR
)
1900 name
= expr_to_var(expr
);
1904 member_name
[sizeof(member_name
) - 1] = '\0';
1905 strcpy(member_name
, "$");
1908 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1909 stree
= __get_cur_stree();
1910 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1911 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1912 strcpy(member_name
, "*$");
1913 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1916 if (strncmp(sm
->name
, name
, len
) != 0)
1918 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1920 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1921 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1922 } END_FOR_EACH_SM(sm
);
1923 } END_FOR_EACH_PTR(cb
);
1928 static void reset_memdb(struct symbol
*sym
)
1930 mem_sql(NULL
, NULL
, "delete from caller_info;");
1931 mem_sql(NULL
, NULL
, "delete from return_states;");
1932 mem_sql(NULL
, NULL
, "delete from call_implies;");
1935 static void match_end_func_info(struct symbol
*sym
)
1937 if (__path_is_null())
1939 call_return_state_hooks(NULL
);
1942 static void match_after_func(struct symbol
*sym
)
1948 static void init_memdb(void)
1952 const char *schema_files
[] = {
1954 "db/caller_info.schema",
1955 "db/return_states.schema",
1956 "db/function_type_size.schema",
1957 "db/type_size.schema",
1958 "db/call_implies.schema",
1959 "db/function_ptr.schema",
1960 "db/local_values.schema",
1961 "db/function_type_value.schema",
1962 "db/type_value.schema",
1963 "db/function_type.schema",
1964 "db/data_info.schema",
1965 "db/parameter_name.schema",
1966 "db/constraints.schema",
1967 "db/constraints_required.schema",
1968 "db/fn_ptr_data_link.schema",
1969 "db/fn_data_link.schema",
1970 "db/mtag_about.schema",
1971 "db/mtag_map.schema",
1972 "db/mtag_data.schema",
1973 "db/mtag_alias.schema",
1975 static char buf
[4096];
1980 rc
= sqlite3_open(":memory:", &mem_db
);
1981 if (rc
!= SQLITE_OK
) {
1982 printf("Error starting In-Memory database.");
1986 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1987 fd
= open_data_file(schema_files
[i
]);
1989 printf("failed to open: %s\n", schema_files
[i
]);
1992 ret
= read(fd
, buf
, sizeof(buf
));
1994 printf("failed to read: %s\n", schema_files
[i
]);
1998 if (ret
== sizeof(buf
)) {
1999 printf("Schema file too large: %s (limit %zd bytes)",
2000 schema_files
[i
], sizeof(buf
));
2004 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
2005 if (rc
!= SQLITE_OK
) {
2006 fprintf(stderr
, "SQL error #2: %s\n", err
);
2007 fprintf(stderr
, "%s\n", buf
);
2012 void open_smatch_db(void)
2021 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
2022 if (rc
!= SQLITE_OK
) {
2029 static void register_common_funcs(void)
2031 struct token
*token
;
2035 if (option_project
== PROJ_NONE
)
2036 strcpy(filename
, "common_functions");
2038 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2040 token
= get_tokens_file(filename
);
2043 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2045 token
= token
->next
;
2046 while (token_type(token
) != TOKEN_STREAMEND
) {
2047 if (token_type(token
) != TOKEN_IDENT
)
2049 func
= alloc_string(show_ident(token
->ident
));
2050 add_ptr_list(&common_funcs
, func
);
2051 token
= token
->next
;
2053 clear_token_alloc();
2056 static char *get_next_string(char **str
)
2058 static char string
[256];
2067 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2072 memcpy(string
, start
, 255);
2074 printf("return_fix: '%s' too long", string
);
2078 memcpy(string
, start
, len
);
2086 static void register_return_replacements(void)
2088 char *func
, *orig
, *new;
2094 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2095 fd
= open_data_file(filename
);
2098 ret
= read(fd
, buf
, sizeof(buf
));
2102 if (ret
== sizeof(buf
)) {
2103 printf("file too large: %s (limit %zd bytes)",
2104 filename
, sizeof(buf
));
2111 get_next_string(&p
);
2114 if (replace_count
== 0 || replace_count
% 3 != 0) {
2118 replace_table
= malloc(replace_count
* sizeof(char *));
2123 func
= alloc_string(get_next_string(&p
));
2124 orig
= alloc_string(get_next_string(&p
));
2125 new = alloc_string(get_next_string(&p
));
2127 replace_table
[i
++] = func
;
2128 replace_table
[i
++] = orig
;
2129 replace_table
[i
++] = new;
2133 void register_definition_db_callbacks(int id
)
2135 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2136 add_hook(&global_variable
, BASE_HOOK
);
2137 add_hook(&global_variable
, DECLARATION_HOOK
);
2138 add_split_return_callback(match_return_info
);
2139 add_split_return_callback(print_returned_struct_members
);
2140 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2141 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2142 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2144 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2145 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
2147 register_common_funcs();
2148 register_return_replacements();
2151 void register_db_call_marker(int id
)
2153 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2156 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2158 struct expression
*arg
;
2160 char member_name
[256];
2165 const char *star
= "";
2167 if (expr
->type
!= EXPR_ASSIGNMENT
)
2169 name
= expr_to_var_sym(expr
->left
, sym
);
2172 if (key
[0] == '*') {
2176 if (strncmp(key
, "$", 1) != 0)
2178 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2180 return alloc_string(member_name
);
2183 while (expr
->type
== EXPR_ASSIGNMENT
)
2184 expr
= strip_expr(expr
->right
);
2185 if (expr
->type
!= EXPR_CALL
)
2188 arg
= get_argument_from_call_expr(expr
->args
, param
);
2192 return get_variable_from_key(arg
, key
, sym
);
2195 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2203 arg
= strip_expr(arg
);
2205 if (strcmp(key
, "$") == 0)
2206 return expr_to_var_sym(arg
, sym
);
2208 if (strcmp(key
, "*$") == 0) {
2209 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2210 arg
= strip_expr(arg
->unop
);
2211 return expr_to_var_sym(arg
, sym
);
2213 tmp
= expr_to_var_sym(arg
, sym
);
2216 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2218 return alloc_string(buf
);
2222 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2223 arg
= strip_expr(arg
->unop
);
2224 tmp
= expr_to_var_sym(arg
, sym
);
2227 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2228 return alloc_string(buf
);
2231 tmp
= expr_to_var_sym(arg
, sym
);
2234 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2236 return alloc_string(buf
);
2239 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2243 if (strcmp("$", key
) == 0)
2244 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2245 return get_variable_from_key(arg
, key
, sym
);
2248 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2251 static char buf
[256];
2253 name_len
= strlen(param_name
);
2255 if (strcmp(state_name
, param_name
) == 0) {
2257 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2258 strncmp(state_name
, param_name
, name_len
) == 0) {
2259 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2261 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2267 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2269 if (!sym
|| !sym
->ident
)
2272 return state_name_to_param_name(name
, sym
->ident
->name
);
2275 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2277 struct symbol
*type
;
2278 const char *sym_name
;
2280 static char buf
[256];
2283 * mtag_name is different from param_name because mtags can be a struct
2284 * instead of a struct pointer. But we want to treat it like a pointer
2285 * because really an mtag is a pointer. Or in other words, if you pass
2286 * a struct foo then you want to talk about foo.bar but with an mtag
2287 * you want to refer to it as foo->bar.
2291 if (!sym
|| !sym
->ident
)
2294 type
= get_real_base_type(sym
);
2295 if (type
&& type
->type
== SYM_BASETYPE
)
2298 sym_name
= sym
->ident
->name
;
2299 name_len
= strlen(sym_name
);
2301 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2302 strncmp(state_name
, sym_name
, name_len
) == 0) {
2303 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2307 return state_name_to_param_name(state_name
, sym_name
);
2310 const char *get_mtag_name_expr(struct expression
*expr
)
2314 const char *ret
= NULL
;
2316 name
= expr_to_var_sym(expr
, &sym
);
2320 ret
= get_mtag_name_var_sym(name
, sym
);
2326 const char *get_param_name(struct sm_state
*sm
)
2328 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2331 char *get_data_info_name(struct expression
*expr
)
2338 expr
= strip_expr(expr
);
2339 name
= get_member_name(expr
);
2342 name
= expr_to_var_sym(expr
, &sym
);
2345 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2347 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2348 snprintf(buf
, sizeof(buf
), "static %s", name
);
2350 snprintf(buf
, sizeof(buf
), "global %s", name
);
2351 ret
= alloc_sname(buf
);