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
;
555 static void sql_select_caller_info(struct select_caller_info_data
*data
,
556 const char *cols
, struct symbol
*sym
,
557 int (*callback
)(void*, int, char**, char**))
560 mem_sql(callback
, data
,
561 "select %s from caller_info where call_id = %lu;",
562 cols
, (unsigned long)__inline_fn
);
566 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
568 run_sql(callback
, data
,
569 "select %s from common_caller_info where %s order by call_id;",
570 cols
, get_static_filter(sym
));
574 run_sql(callback
, data
,
575 "select %s from caller_info where %s order by call_id;",
576 cols
, get_static_filter(sym
));
579 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
581 struct def_callback
*def_callback
= __alloc_def_callback(0);
583 def_callback
->hook_type
= type
;
584 def_callback
->callback
= callback
;
585 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
589 * These call backs are used when the --info option is turned on to print struct
590 * member information. For example foo->bar could have a state in
591 * smatch_extra.c and also check_user.c.
593 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
595 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
597 member_callback
->owner
= owner
;
598 member_callback
->callback
= callback
;
599 add_ptr_list(&member_callbacks
, member_callback
);
602 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
604 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
606 callback
->callback
= fn
;
607 add_ptr_list(&returned_state_callbacks
, callback
);
610 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
))
612 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
614 member_callback
->owner
= owner
;
615 member_callback
->callback
= callback
;
616 add_ptr_list(&returned_member_callbacks
, member_callback
);
619 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
621 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
624 cb
->callback
= callback
;
625 add_ptr_list(&call_implies_cb_list
, cb
);
629 struct expression
*static_returns_call
;
630 struct symbol
*return_type
;
631 struct range_list
*return_range_list
;
634 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
636 struct return_info
*ret_info
= _ret_info
;
637 struct range_list
*rl
;
638 struct expression
*call_expr
= ret_info
->static_returns_call
;
642 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
643 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
647 struct range_list
*db_return_vals(struct expression
*expr
)
649 struct return_info ret_info
= {};
653 if (is_fake_call(expr
))
656 snprintf(buf
, sizeof(buf
), "return %p", expr
);
657 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
659 return clone_rl(estate_rl(sm
->state
));
660 ret_info
.static_returns_call
= expr
;
661 ret_info
.return_type
= get_type(expr
);
662 if (!ret_info
.return_type
)
665 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
668 ret_info
.return_range_list
= NULL
;
669 if (inlinable(expr
->fn
)) {
670 mem_sql(db_return_callback
, &ret_info
,
671 "select distinct return from return_states where call_id = '%lu';",
672 (unsigned long)expr
);
674 run_sql(db_return_callback
, &ret_info
,
675 "select distinct return from return_states where %s;",
676 get_static_filter(expr
->fn
->symbol
));
678 return ret_info
.return_range_list
;
681 struct range_list
*db_return_vals_from_str(const char *fn_name
)
683 struct return_info ret_info
;
685 ret_info
.static_returns_call
= NULL
;
686 ret_info
.return_type
= &llong_ctype
;
687 ret_info
.return_range_list
= NULL
;
689 run_sql(db_return_callback
, &ret_info
,
690 "select distinct return from return_states where function = '%s';",
692 return ret_info
.return_range_list
;
695 static void match_call_marker(struct expression
*expr
)
699 type
= get_type(expr
->fn
);
700 if (type
&& type
->type
== SYM_PTR
)
701 type
= get_real_base_type(type
);
704 * we just want to record something in the database so that if we have
705 * two calls like: frob(4); frob(some_unkown); then on the receiving
706 * side we know that sometimes frob is called with unknown parameters.
709 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
712 static char *show_offset(int offset
)
718 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
722 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
723 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
729 char printed_name
[256];
732 expr
= strip_expr(expr
);
733 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
734 expr
= strip_expr(expr
->unop
);
738 name
= expr_to_var_sym(expr
, &sym
);
743 FOR_EACH_SM(stree
, sm
) {
746 if (strcmp(name
, sm
->name
) == 0) {
748 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
749 else /* these are already handled. fixme: handle them here */
751 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
752 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
753 } else if (strncmp(name
, sm
->name
, len
) == 0) {
754 if (isalnum(sm
->name
[len
]))
757 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
759 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
763 callback(call
, param
, printed_name
, sm
);
764 } END_FOR_EACH_SM(sm
);
769 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
771 char **container
= _container
;
772 static char buf
[256];
774 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
779 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
780 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
782 struct expression
*tmp
;
783 char *container
= NULL
;
788 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
)
792 * We can't use the in-mem DB because we have to parse the function
793 * first, then we know if it takes a container, then we know to pass it
794 * the container data.
797 run_sql(¶m_used_callback
, &container
,
798 "select key from call_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
799 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
803 p
= strchr(container
, '-');
812 tmp
= get_assigned_expr(expr
);
816 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
818 expr
= strip_expr(expr
->unop
);
819 holder_offset
= get_member_offset_from_deref(expr
);
820 if (-holder_offset
!= offset
)
823 expr
= strip_expr(expr
->deref
);
824 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
825 expr
= strip_expr(expr
->unop
);
827 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
830 static void match_call_info(struct expression
*call
)
832 struct member_info_callback
*cb
;
833 struct expression
*arg
;
838 name
= get_fnptr_name(call
->fn
);
842 FOR_EACH_PTR(member_callbacks
, cb
) {
843 stree
= get_all_states_stree(cb
->owner
);
845 FOR_EACH_PTR(call
->args
, arg
) {
846 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
847 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
849 } END_FOR_EACH_PTR(arg
);
851 } END_FOR_EACH_PTR(cb
);
856 static int get_param(int param
, char **name
, struct symbol
**sym
)
862 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
864 * this is a temporary hack to work around a bug (I think in sparse?)
865 * 2.6.37-rc1:fs/reiserfs/journal.o
866 * If there is a function definition without parameter name found
867 * after a function implementation then it causes a crash.
871 if (arg
->ident
->name
< (char *)100)
874 *name
= arg
->ident
->name
;
879 } END_FOR_EACH_PTR(arg
);
884 static int function_signature_matches(const char *sig
)
888 my_sig
= function_signature();
890 return 1; /* default to matching */
891 if (strcmp(my_sig
, sig
) == 0)
896 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
898 struct select_caller_info_data
*data
= _data
;
905 struct symbol
*sym
= NULL
;
906 struct def_callback
*def_callback
;
914 func_id
= atoi(argv
[0]);
916 type
= strtol(argv
[1], NULL
, 10);
917 param
= strtol(argv
[2], NULL
, 10);
923 if (data
->prev_func_id
== -1)
924 data
->prev_func_id
= func_id
;
925 if (func_id
!= data
->prev_func_id
) {
926 stree
= __pop_fake_cur_stree();
928 merge_stree(&data
->final_states
, stree
);
930 __push_fake_cur_stree();
932 data
->prev_func_id
= func_id
;
938 if (type
== INTERNAL
&&
939 !function_signature_matches(value
)) {
944 if (param
>= 0 && !get_param(param
, &name
, &sym
))
947 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
948 if (def_callback
->hook_type
== type
)
949 def_callback
->callback(name
, sym
, key
, value
);
950 } END_FOR_EACH_PTR(def_callback
);
955 static void get_direct_callers(struct select_caller_info_data
*data
, struct symbol
*sym
)
957 sql_select_caller_info(data
,
958 "call_id, type, parameter, key, value", sym
,
959 caller_info_callback
);
962 static struct string_list
*ptr_names_done
;
963 static struct string_list
*ptr_names
;
965 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
967 insert_string(&ptr_names
, alloc_string(argv
[0]));
971 static char *get_next_ptr_name(void)
975 FOR_EACH_PTR(ptr_names
, ptr
) {
976 if (list_has_string(ptr_names_done
, ptr
))
978 insert_string(&ptr_names_done
, ptr
);
980 } END_FOR_EACH_PTR(ptr
);
984 static void get_ptr_names(const char *file
, const char *name
)
986 char sql_filter
[1024];
990 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
993 snprintf(sql_filter
, 1024, "function = '%s';", name
);
996 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
998 run_sql(get_ptr_name
, NULL
,
999 "select distinct ptr from function_ptr where %s",
1002 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1003 if (before
== after
)
1006 while ((name
= get_next_ptr_name()))
1007 get_ptr_names(NULL
, name
);
1010 static void match_data_from_db(struct symbol
*sym
)
1012 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1013 struct sm_state
*sm
;
1014 struct stree
*stree
;
1016 if (!sym
|| !sym
->ident
)
1019 __push_fake_cur_stree();
1025 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1026 get_ptr_names(get_base_file(), sym
->ident
->name
);
1028 get_ptr_names(NULL
, sym
->ident
->name
);
1030 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1031 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1032 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1033 stree
= __pop_fake_cur_stree();
1038 get_direct_callers(&data
, sym
);
1040 stree
= __pop_fake_cur_stree();
1042 merge_stree(&data
.final_states
, stree
);
1044 __push_fake_cur_stree();
1046 data
.prev_func_id
= -1;
1049 FOR_EACH_PTR(ptr_names
, ptr
) {
1050 run_sql(caller_info_callback
, &data
,
1051 "select call_id, type, parameter, key, value"
1052 " from common_caller_info where function = '%s' order by call_id",
1054 } END_FOR_EACH_PTR(ptr
);
1057 FOR_EACH_PTR(ptr_names
, ptr
) {
1059 } END_FOR_EACH_PTR(ptr
);
1060 goto free_ptr_names
;
1063 FOR_EACH_PTR(ptr_names
, ptr
) {
1064 run_sql(caller_info_callback
, &data
,
1065 "select call_id, type, parameter, key, value"
1066 " from caller_info where function = '%s' order by call_id",
1069 } END_FOR_EACH_PTR(ptr
);
1072 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1073 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1075 get_direct_callers(&data
, sym
);
1078 stree
= __pop_fake_cur_stree();
1080 merge_stree(&data
.final_states
, stree
);
1083 FOR_EACH_SM(data
.final_states
, sm
) {
1085 } END_FOR_EACH_SM(sm
);
1087 free_stree(&data
.final_states
);
1090 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1092 struct expression
*call_expr
= _call
;
1093 struct call_implies_callback
*cb
;
1094 struct expression
*arg
= NULL
;
1101 type
= atoi(argv
[1]);
1102 param
= atoi(argv
[2]);
1104 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
1105 if (cb
->type
!= type
)
1108 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1112 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1113 } END_FOR_EACH_PTR(cb
);
1118 static void match_call_implies(struct expression
*expr
)
1120 sql_select_call_implies("function, type, parameter, key, value", expr
,
1121 call_implies_callbacks
);
1124 static void print_initializer_list(struct expression_list
*expr_list
,
1125 struct symbol
*struct_type
)
1127 struct expression
*expr
;
1128 struct symbol
*base_type
;
1129 char struct_name
[256];
1131 FOR_EACH_PTR(expr_list
, expr
) {
1132 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1133 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1136 if (expr
->type
!= EXPR_IDENTIFIER
)
1138 if (!expr
->expr_ident
)
1140 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1142 base_type
= get_type(expr
->ident_expression
);
1143 if (!base_type
|| base_type
->type
!= SYM_FN
)
1145 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1146 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1147 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1149 } END_FOR_EACH_PTR(expr
);
1152 static void global_variable(struct symbol
*sym
)
1154 struct symbol
*struct_type
;
1158 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1160 struct_type
= get_base_type(sym
);
1163 if (struct_type
->type
== SYM_ARRAY
) {
1164 struct_type
= get_base_type(struct_type
);
1168 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1170 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1173 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1175 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1178 static void call_return_state_hooks_conditional(struct expression
*expr
)
1180 struct returned_state_callback
*cb
;
1181 struct range_list
*rl
;
1182 char *return_ranges
;
1183 int final_pass_orig
= final_pass
;
1185 __push_fake_cur_stree();
1188 __split_whole_condition(expr
->conditional
);
1189 final_pass
= final_pass_orig
;
1191 if (get_implied_rl(expr
->cond_true
, &rl
))
1192 rl
= cast_rl(cur_func_return_type(), rl
);
1194 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1195 return_ranges
= show_rl(rl
);
1196 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1199 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1200 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1201 } END_FOR_EACH_PTR(cb
);
1203 __push_true_states();
1204 __use_false_states();
1206 if (get_implied_rl(expr
->cond_false
, &rl
))
1207 rl
= cast_rl(cur_func_return_type(), rl
);
1209 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1210 return_ranges
= show_rl(rl
);
1211 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1214 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1215 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1216 } END_FOR_EACH_PTR(cb
);
1218 __merge_true_states();
1219 __free_fake_cur_stree();
1222 static void call_return_state_hooks_compare(struct expression
*expr
)
1224 struct returned_state_callback
*cb
;
1225 char *return_ranges
;
1226 int final_pass_orig
= final_pass
;
1227 sval_t sval
= { .type
= &int_ctype
};
1230 if (!get_implied_value(expr
, &ret
))
1233 __push_fake_cur_stree();
1236 __split_whole_condition(expr
);
1237 final_pass
= final_pass_orig
;
1239 if (ret
.value
!= 0) {
1240 return_ranges
= alloc_sname("1");
1242 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1245 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1246 cb
->callback(return_id
, return_ranges
, expr
);
1247 } END_FOR_EACH_PTR(cb
);
1250 __push_true_states();
1251 __use_false_states();
1253 if (ret
.value
!= 1) {
1254 return_ranges
= alloc_sname("0");
1256 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1259 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1260 cb
->callback(return_id
, return_ranges
, expr
);
1261 } END_FOR_EACH_PTR(cb
);
1264 __merge_true_states();
1265 __free_fake_cur_stree();
1268 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1270 struct sm_state
*tmp
;
1272 FOR_EACH_PTR(slist
, tmp
) {
1273 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1275 } END_FOR_EACH_PTR(tmp
);
1280 static char *get_return_compare_str(struct expression
*expr
)
1288 compare_str
= expr_lte_to_param(expr
, -1);
1291 param
= get_param_num(expr
);
1295 var
= expr_to_var(expr
);
1298 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1299 comparison
= get_comparison_strings(var
, buf
);
1305 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1306 return alloc_sname(buf
);
1309 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1311 struct returned_state_callback
*cb
;
1312 struct range_list
*rl
;
1313 char *return_ranges
;
1314 struct sm_state
*tmp
;
1316 int nr_possible
, nr_states
;
1317 char *compare_str
= NULL
;
1319 struct state_list
*already_handled
= NULL
;
1321 if (!sm
|| !sm
->merged
)
1324 if (too_many_possible(sm
))
1327 /* bail if it gets too complicated */
1328 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1329 nr_states
= stree_count(__get_cur_stree());
1330 if (nr_states
* nr_possible
>= 2000)
1333 FOR_EACH_PTR(sm
->possible
, tmp
) {
1336 if (ptr_in_list(tmp
, already_handled
))
1338 add_ptr_list(&already_handled
, tmp
);
1341 __push_fake_cur_stree();
1343 overwrite_states_using_pool(sm
, tmp
);
1345 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1346 return_ranges
= show_rl(rl
);
1347 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1348 compare_str
= get_return_compare_str(expr
);
1350 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1351 return_ranges
= alloc_sname(buf
);
1355 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1356 cb
->callback(return_id
, return_ranges
, expr
);
1357 } END_FOR_EACH_PTR(cb
);
1359 __free_fake_cur_stree();
1360 } END_FOR_EACH_PTR(tmp
);
1362 free_slist(&already_handled
);
1367 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1369 struct sm_state
*sm
;
1371 if (!expr
|| expr_equal_to_param(expr
, -1))
1374 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1375 return split_possible_helper(sm
, expr
);
1378 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1380 struct range_list
*rl
;
1381 char *return_ranges
;
1390 return alloc_sname("");
1392 if (get_implied_value(expr
, &sval
)) {
1393 sval
= sval_cast(cur_func_return_type(), sval
);
1394 *rl_p
= alloc_rl(sval
, sval
);
1395 return sval_to_str(sval
);
1398 compare_str
= expr_equal_to_param(expr
, -1);
1399 math_str
= get_value_in_terms_of_parameter_math(expr
);
1401 if (get_implied_rl(expr
, &rl
)) {
1402 rl
= cast_rl(cur_func_return_type(), rl
);
1403 return_ranges
= show_rl(rl
);
1404 } else if (get_imaginary_absolute(expr
, &rl
)){
1405 rl
= cast_rl(cur_func_return_type(), rl
);
1406 return alloc_sname(show_rl(rl
));
1408 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1409 return_ranges
= show_rl(rl
);
1414 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1415 return alloc_sname(buf
);
1418 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1419 return alloc_sname(buf
);
1421 compare_str
= get_return_compare_str(expr
);
1423 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1424 return alloc_sname(buf
);
1427 return return_ranges
;
1430 static int split_positive_from_negative(struct expression
*expr
)
1432 struct returned_state_callback
*cb
;
1433 struct range_list
*rl
;
1434 const char *return_ranges
;
1435 struct range_list
*ret_rl
;
1438 /* We're going to print the states 3 times */
1439 if (stree_count(__get_cur_stree()) > 10000 / 3)
1442 if (!get_implied_rl(expr
, &rl
) || !rl
)
1444 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1446 /* Forget about INT_MAX and larger */
1447 if (rl_max(rl
).value
<= 0)
1449 if (!sval_is_negative(rl_min(rl
)))
1452 if (!assume(compare_expression(expr
, '>', zero_expr())))
1456 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1457 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1458 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1459 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1460 } END_FOR_EACH_PTR(cb
);
1464 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1465 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1468 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1469 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1470 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1471 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1472 } END_FOR_EACH_PTR(cb
);
1478 undo
= assume(compare_expression(expr
, '<', 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
);
1493 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1495 struct returned_state_callback
*cb
;
1496 struct range_list
*rl
;
1497 struct range_list
*nonnull_rl
;
1499 struct range_list
*null_rl
= NULL
;
1500 char *return_ranges
;
1501 struct sm_state
*sm
;
1502 struct smatch_state
*state
;
1504 int final_pass_orig
= final_pass
;
1506 if (!expr
|| expr_equal_to_param(expr
, -1))
1508 if (expr
->type
== EXPR_CALL
)
1510 if (!is_pointer(expr
))
1513 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1516 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1519 if (!estate_rl(state
))
1521 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1523 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1526 nr_states
= stree_count(__get_cur_stree());
1527 if (option_info
&& nr_states
>= 1500)
1530 rl
= estate_rl(state
);
1532 __push_fake_cur_stree();
1535 __split_whole_condition(expr
);
1536 final_pass
= final_pass_orig
;
1538 nonnull_rl
= rl_filter(rl
, rl_zero());
1539 return_ranges
= show_rl(nonnull_rl
);
1540 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1543 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1544 cb
->callback(return_id
, return_ranges
, expr
);
1545 } END_FOR_EACH_PTR(cb
);
1547 __push_true_states();
1548 __use_false_states();
1550 return_ranges
= alloc_sname("0");
1551 null_sval
= sval_type_val(rl_type(rl
), 0);
1552 add_range(&null_rl
, null_sval
, null_sval
);
1553 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1555 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1556 cb
->callback(return_id
, return_ranges
, expr
);
1557 } END_FOR_EACH_PTR(cb
);
1559 __merge_true_states();
1560 __free_fake_cur_stree();
1565 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1567 struct range_list
*rl
;
1568 struct range_list
*nonzero_rl
;
1570 struct range_list
*zero_rl
= NULL
;
1572 struct returned_state_callback
*cb
;
1573 char *return_ranges
;
1574 int final_pass_orig
= final_pass
;
1577 if (option_project
!= PROJ_KERNEL
)
1580 nr_states
= stree_count(__get_cur_stree());
1581 if (nr_states
> 1500)
1584 if (get_value(expr
, &val
))
1586 if (!get_implied_rl(expr
, &rl
))
1588 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1590 if (rl_max(rl
).value
!= 0)
1593 __push_fake_cur_stree();
1596 __split_whole_condition(expr
);
1597 final_pass
= final_pass_orig
;
1599 nonzero_rl
= rl_filter(rl
, rl_zero());
1600 return_ranges
= show_rl(nonzero_rl
);
1601 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1604 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1605 cb
->callback(return_id
, return_ranges
, expr
);
1606 } END_FOR_EACH_PTR(cb
);
1608 __push_true_states();
1609 __use_false_states();
1611 return_ranges
= alloc_sname("0");
1612 zero_sval
= sval_type_val(rl_type(rl
), 0);
1613 add_range(&zero_rl
, zero_sval
, zero_sval
);
1614 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1616 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1617 cb
->callback(return_id
, return_ranges
, expr
);
1618 } END_FOR_EACH_PTR(cb
);
1620 __merge_true_states();
1621 __free_fake_cur_stree();
1626 static int is_boolean(struct expression
*expr
)
1628 struct range_list
*rl
;
1630 if (!get_implied_rl(expr
, &rl
))
1632 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1637 static int is_conditional(struct expression
*expr
)
1641 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1646 static int splitable_function_call(struct expression
*expr
)
1648 struct sm_state
*sm
;
1651 if (!expr
|| expr
->type
!= EXPR_CALL
)
1653 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1654 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1655 return split_possible_helper(sm
, expr
);
1658 static struct sm_state
*find_bool_param(void)
1660 struct stree
*start_states
;
1662 struct sm_state
*sm
, *tmp
;
1665 start_states
= get_start_states();
1667 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1670 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1673 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1674 rl_max(estate_rl(sm
->state
)).value
!= 1)
1677 } END_FOR_EACH_PTR_REVERSE(arg
);
1683 * Check if it's splitable. If not, then splitting it up is likely not
1684 * useful for the callers.
1686 FOR_EACH_PTR(sm
->possible
, tmp
) {
1689 if (!estate_get_single_value(tmp
->state
, &sval
))
1691 } END_FOR_EACH_PTR(tmp
);
1696 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1698 struct returned_state_callback
*cb
;
1699 struct range_list
*ret_rl
;
1700 const char *return_ranges
;
1701 struct sm_state
*tmp
;
1703 int nr_possible
, nr_states
;
1704 char *compare_str
= NULL
;
1706 struct state_list
*already_handled
= NULL
;
1708 if (!sm
|| !sm
->merged
)
1711 if (too_many_possible(sm
))
1714 /* bail if it gets too complicated */
1715 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1716 nr_states
= stree_count(__get_cur_stree());
1717 if (nr_states
* nr_possible
>= 2000)
1720 FOR_EACH_PTR(sm
->possible
, tmp
) {
1723 if (ptr_in_list(tmp
, already_handled
))
1725 add_ptr_list(&already_handled
, tmp
);
1728 __push_fake_cur_stree();
1730 overwrite_states_using_pool(sm
, tmp
);
1732 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1733 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1734 compare_str
= get_return_compare_str(expr
);
1736 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1737 return_ranges
= alloc_sname(buf
);
1741 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1742 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1743 } END_FOR_EACH_PTR(cb
);
1745 __free_fake_cur_stree();
1746 } END_FOR_EACH_PTR(tmp
);
1748 free_slist(&already_handled
);
1753 static int split_by_bool_param(struct expression
*expr
)
1755 struct sm_state
*start_sm
, *sm
;
1758 start_sm
= find_bool_param();
1761 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1762 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1764 return split_on_bool_sm(sm
, expr
);
1767 static int split_by_null_nonnull_param(struct expression
*expr
)
1770 struct sm_state
*sm
;
1772 /* function must only take one pointer */
1773 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1775 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1778 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1781 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1783 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1787 return split_on_bool_sm(sm
, expr
);
1790 struct expression
*strip_expr_statement(struct expression
*expr
)
1792 struct expression
*orig
= expr
;
1793 struct statement
*stmt
, *last_stmt
;
1797 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1799 if (expr
->type
!= EXPR_STATEMENT
)
1801 stmt
= expr
->statement
;
1802 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1805 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1806 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1807 last_stmt
= last_stmt
->label_statement
;
1808 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1810 return strip_expr(last_stmt
->expression
);
1813 static void call_return_state_hooks(struct expression
*expr
)
1815 struct returned_state_callback
*cb
;
1816 struct range_list
*ret_rl
;
1817 const char *return_ranges
;
1821 if (__path_is_null())
1824 expr
= strip_expr(expr
);
1825 expr
= strip_expr_statement(expr
);
1827 if (is_impossible_path())
1830 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1831 !get_implied_value(expr
, &sval
)) &&
1832 (is_condition(expr
) || is_boolean(expr
))) {
1833 call_return_state_hooks_compare(expr
);
1835 } else if (is_conditional(expr
)) {
1836 call_return_state_hooks_conditional(expr
);
1838 } else if (call_return_state_hooks_split_possible(expr
)) {
1840 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1842 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1844 } else if (splitable_function_call(expr
)) {
1846 } else if (split_positive_from_negative(expr
)) {
1848 } else if (split_by_bool_param(expr
)) {
1849 } else if (split_by_null_nonnull_param(expr
)) {
1854 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1855 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1858 nr_states
= stree_count(__get_cur_stree());
1859 if (nr_states
>= 10000) {
1860 match_return_info(return_id
, (char *)return_ranges
, expr
);
1863 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1864 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1865 } END_FOR_EACH_PTR(cb
);
1868 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1870 struct returned_member_callback
*cb
;
1871 struct stree
*stree
;
1872 struct sm_state
*sm
;
1873 struct symbol
*type
;
1875 char member_name
[256];
1878 type
= get_type(expr
);
1879 if (!type
|| type
->type
!= SYM_PTR
)
1881 name
= expr_to_var(expr
);
1885 member_name
[sizeof(member_name
) - 1] = '\0';
1886 strcpy(member_name
, "$");
1889 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1890 stree
= __get_cur_stree();
1891 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1892 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1893 strcpy(member_name
, "*$");
1894 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1897 if (strncmp(sm
->name
, name
, len
) != 0)
1899 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1901 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1902 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1903 } END_FOR_EACH_SM(sm
);
1904 } END_FOR_EACH_PTR(cb
);
1909 static void reset_memdb(struct symbol
*sym
)
1911 mem_sql(NULL
, NULL
, "delete from caller_info;");
1912 mem_sql(NULL
, NULL
, "delete from return_states;");
1913 mem_sql(NULL
, NULL
, "delete from call_implies;");
1916 static void match_end_func_info(struct symbol
*sym
)
1918 if (__path_is_null())
1920 call_return_state_hooks(NULL
);
1923 static void match_after_func(struct symbol
*sym
)
1929 static void init_memdb(void)
1933 const char *schema_files
[] = {
1935 "db/caller_info.schema",
1936 "db/return_states.schema",
1937 "db/function_type_size.schema",
1938 "db/type_size.schema",
1939 "db/call_implies.schema",
1940 "db/function_ptr.schema",
1941 "db/local_values.schema",
1942 "db/function_type_value.schema",
1943 "db/type_value.schema",
1944 "db/function_type.schema",
1945 "db/data_info.schema",
1946 "db/parameter_name.schema",
1947 "db/constraints.schema",
1948 "db/constraints_required.schema",
1949 "db/fn_ptr_data_link.schema",
1950 "db/fn_data_link.schema",
1951 "db/mtag_about.schema",
1952 "db/mtag_map.schema",
1953 "db/mtag_data.schema",
1955 static char buf
[4096];
1960 rc
= sqlite3_open(":memory:", &mem_db
);
1961 if (rc
!= SQLITE_OK
) {
1962 printf("Error starting In-Memory database.");
1966 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1967 fd
= open_data_file(schema_files
[i
]);
1969 printf("failed to open: %s\n", schema_files
[i
]);
1972 ret
= read(fd
, buf
, sizeof(buf
));
1974 printf("failed to read: %s\n", schema_files
[i
]);
1978 if (ret
== sizeof(buf
)) {
1979 printf("Schema file too large: %s (limit %zd bytes)",
1980 schema_files
[i
], sizeof(buf
));
1984 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
1985 if (rc
!= SQLITE_OK
) {
1986 fprintf(stderr
, "SQL error #2: %s\n", err
);
1987 fprintf(stderr
, "%s\n", buf
);
1992 void open_smatch_db(void)
2001 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
2002 if (rc
!= SQLITE_OK
) {
2009 static void register_common_funcs(void)
2011 struct token
*token
;
2015 if (option_project
== PROJ_NONE
)
2016 strcpy(filename
, "common_functions");
2018 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2020 token
= get_tokens_file(filename
);
2023 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2025 token
= token
->next
;
2026 while (token_type(token
) != TOKEN_STREAMEND
) {
2027 if (token_type(token
) != TOKEN_IDENT
)
2029 func
= alloc_string(show_ident(token
->ident
));
2030 add_ptr_list(&common_funcs
, func
);
2031 token
= token
->next
;
2033 clear_token_alloc();
2036 static char *get_next_string(char **str
)
2038 static char string
[256];
2047 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2052 memcpy(string
, start
, 255);
2054 printf("return_fix: '%s' too long", string
);
2058 memcpy(string
, start
, len
);
2066 static void register_return_replacements(void)
2068 char *func
, *orig
, *new;
2074 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2075 fd
= open_data_file(filename
);
2078 ret
= read(fd
, buf
, sizeof(buf
));
2082 if (ret
== sizeof(buf
)) {
2083 printf("file too large: %s (limit %zd bytes)",
2084 filename
, sizeof(buf
));
2091 get_next_string(&p
);
2094 if (replace_count
== 0 || replace_count
% 3 != 0) {
2098 replace_table
= malloc(replace_count
* sizeof(char *));
2103 func
= alloc_string(get_next_string(&p
));
2104 orig
= alloc_string(get_next_string(&p
));
2105 new = alloc_string(get_next_string(&p
));
2107 replace_table
[i
++] = func
;
2108 replace_table
[i
++] = orig
;
2109 replace_table
[i
++] = new;
2113 void register_definition_db_callbacks(int id
)
2115 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2116 add_hook(&global_variable
, BASE_HOOK
);
2117 add_hook(&global_variable
, DECLARATION_HOOK
);
2118 add_split_return_callback(match_return_info
);
2119 add_split_return_callback(print_returned_struct_members
);
2120 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2121 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2122 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2124 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2125 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
2127 register_common_funcs();
2128 register_return_replacements();
2131 void register_db_call_marker(int id
)
2133 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2136 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2138 struct expression
*arg
;
2140 char member_name
[256];
2145 const char *star
= "";
2147 if (expr
->type
!= EXPR_ASSIGNMENT
)
2149 name
= expr_to_var_sym(expr
->left
, sym
);
2152 if (key
[0] == '*') {
2156 if (strncmp(key
, "$", 1) != 0)
2158 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2160 return alloc_string(member_name
);
2163 while (expr
->type
== EXPR_ASSIGNMENT
)
2164 expr
= strip_expr(expr
->right
);
2165 if (expr
->type
!= EXPR_CALL
)
2168 arg
= get_argument_from_call_expr(expr
->args
, param
);
2172 return get_variable_from_key(arg
, key
, sym
);
2175 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2183 arg
= strip_expr(arg
);
2185 if (strcmp(key
, "$") == 0)
2186 return expr_to_var_sym(arg
, sym
);
2188 if (strcmp(key
, "*$") == 0) {
2189 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2190 arg
= strip_expr(arg
->unop
);
2191 return expr_to_var_sym(arg
, sym
);
2193 tmp
= expr_to_var_sym(arg
, sym
);
2196 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2198 return alloc_string(buf
);
2202 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2203 arg
= strip_expr(arg
->unop
);
2204 tmp
= expr_to_var_sym(arg
, sym
);
2207 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2208 return alloc_string(buf
);
2211 tmp
= expr_to_var_sym(arg
, sym
);
2214 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2216 return alloc_string(buf
);
2219 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2223 if (strcmp("$", key
) == 0)
2224 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2225 return get_variable_from_key(arg
, key
, sym
);
2228 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2231 static char buf
[256];
2233 name_len
= strlen(param_name
);
2235 if (strcmp(state_name
, param_name
) == 0) {
2237 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2238 strncmp(state_name
, param_name
, name_len
) == 0) {
2239 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2241 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2247 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2249 if (!sym
|| !sym
->ident
)
2252 return state_name_to_param_name(name
, sym
->ident
->name
);
2255 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2257 struct symbol
*type
;
2258 const char *sym_name
;
2260 static char buf
[256];
2263 * mtag_name is different from param_name because mtags can be a struct
2264 * instead of a struct pointer. But we want to treat it like a pointer
2265 * because really an mtag is a pointer. Or in other words, if you pass
2266 * a struct foo then you want to talk about foo.bar but with an mtag
2267 * you want to refer to it as foo->bar.
2271 if (!sym
|| !sym
->ident
)
2274 type
= get_real_base_type(sym
);
2275 if (type
&& type
->type
== SYM_BASETYPE
)
2278 sym_name
= sym
->ident
->name
;
2279 name_len
= strlen(sym_name
);
2281 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2282 strncmp(state_name
, sym_name
, name_len
) == 0) {
2283 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2287 return state_name_to_param_name(state_name
, sym_name
);
2290 const char *get_mtag_name_expr(struct expression
*expr
)
2294 const char *ret
= NULL
;
2296 name
= expr_to_var_sym(expr
, &sym
);
2300 ret
= get_mtag_name_var_sym(name
, sym
);
2306 const char *get_param_name(struct sm_state
*sm
)
2308 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2311 char *get_data_info_name(struct expression
*expr
)
2318 expr
= strip_expr(expr
);
2319 name
= get_member_name(expr
);
2322 name
= expr_to_var_sym(expr
, &sym
);
2325 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2327 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2328 snprintf(buf
, sizeof(buf
), "static %s", name
);
2330 snprintf(buf
, sizeof(buf
), "global %s", name
);
2331 ret
= alloc_sname(buf
);