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 void sql_insert_mtag_alias(mtag_t orig
, mtag_t alias
)
384 sql_insert(mtag_alias
, "%lld, %lld", orig
, alias
);
387 static int save_mtag(void *_tag
, int argc
, char **argv
, char **azColName
)
389 mtag_t
*saved_tag
= _tag
;
392 new_tag
= strtoll(argv
[0], NULL
, 10);
395 *saved_tag
= new_tag
;
396 else if (*saved_tag
!= new_tag
)
402 int mtag_map_select_container(mtag_t tag
, int offset
, mtag_t
*container
)
406 run_sql(save_mtag
, &tmp
,
407 "select container from mtag_map where tag = %lld and offset = %d;",
410 if (tmp
== 0 || tmp
== -1ULL)
416 int mtag_map_select_tag(mtag_t container
, int offset
, mtag_t
*tag
)
420 run_sql(save_mtag
, &tmp
,
421 "select tag from mtag_map where container = %lld and offset = %d;",
424 if (tmp
== 0 || tmp
== -1ULL)
430 char *get_static_filter(struct symbol
*sym
)
432 static char sql_filter
[1024];
434 /* This can only happen on buggy code. Return invalid SQL. */
436 sql_filter
[0] = '\0';
440 if (sym
->ctype
.modifiers
& MOD_STATIC
) {
441 snprintf(sql_filter
, sizeof(sql_filter
),
442 "file = '%s' and function = '%s' and static = '1'",
443 get_base_file(), sym
->ident
->name
);
445 snprintf(sql_filter
, sizeof(sql_filter
),
446 "function = '%s' and static = '0'", sym
->ident
->name
);
452 static int get_row_count(void *_row_count
, int argc
, char **argv
, char **azColName
)
454 int *row_count
= _row_count
;
459 *row_count
= atoi(argv
[0]);
463 static void mark_params_untracked(struct expression
*call
)
465 struct expression
*arg
;
468 FOR_EACH_PTR(call
->args
, arg
) {
469 mark_untracked(call
, i
++, "$", NULL
);
470 } END_FOR_EACH_PTR(arg
);
473 static void sql_select_return_states_pointer(const char *cols
,
474 struct expression
*call
, int (*callback
)(void*, int, char**, char**), void *info
)
477 int return_count
= 0;
479 ptr
= get_fnptr_name(call
->fn
);
483 run_sql(get_row_count
, &return_count
,
484 "select count(*) from return_states join function_ptr "
485 "where return_states.function == function_ptr.function and "
486 "ptr = '%s' and searchable = 1 and type = %d;", ptr
, INTERNAL
);
487 /* The magic number 100 is just from testing on the kernel. */
488 if (return_count
> 100) {
489 mark_params_untracked(call
);
493 run_sql(callback
, info
,
494 "select %s from return_states join function_ptr where "
495 "return_states.function == function_ptr.function and ptr = '%s' "
496 "and searchable = 1 "
497 "order by function_ptr.file, return_states.file, return_id, type;",
501 static int is_local_symbol(struct expression
*expr
)
503 if (expr
->type
!= EXPR_SYMBOL
)
505 if (expr
->symbol
->ctype
.modifiers
& (MOD_NONLOCAL
| MOD_STATIC
| MOD_ADDRESSABLE
))
510 void sql_select_return_states(const char *cols
, struct expression
*call
,
511 int (*callback
)(void*, int, char**, char**), void *info
)
515 if (is_fake_call(call
))
518 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
|| is_local_symbol(call
->fn
)) {
519 sql_select_return_states_pointer(cols
, call
, callback
, info
);
523 if (inlinable(call
->fn
)) {
524 mem_sql(callback
, info
,
525 "select %s from return_states where call_id = '%lu' order by return_id, type;",
526 cols
, (unsigned long)call
);
530 run_sql(get_row_count
, &row_count
, "select count(*) from return_states where %s;",
531 get_static_filter(call
->fn
->symbol
));
532 if (row_count
> 3000)
535 run_sql(callback
, info
, "select %s from return_states where %s order by file, return_id, type;",
536 cols
, get_static_filter(call
->fn
->symbol
));
539 void sql_select_call_implies(const char *cols
, struct expression
*call
,
540 int (*callback
)(void*, int, char**, char**))
542 if (call
->fn
->type
!= EXPR_SYMBOL
|| !call
->fn
->symbol
)
545 if (inlinable(call
->fn
)) {
546 mem_sql(callback
, call
,
547 "select %s from call_implies where call_id = '%lu';",
548 cols
, (unsigned long)call
);
552 run_sql(callback
, call
, "select %s from call_implies where %s;",
553 cols
, get_static_filter(call
->fn
->symbol
));
556 struct select_caller_info_data
{
557 struct stree
*final_states
;
558 struct timeval start_time
;
564 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
);
566 static void sql_select_caller_info(struct select_caller_info_data
*data
,
567 const char *cols
, struct symbol
*sym
)
570 mem_sql(caller_info_callback
, data
,
571 "select %s from caller_info where call_id = %lu;",
572 cols
, (unsigned long)__inline_fn
);
576 if (sym
->ident
->name
&& is_common_function(sym
->ident
->name
))
578 run_sql(caller_info_callback
, data
,
579 "select %s from common_caller_info where %s order by call_id;",
580 cols
, get_static_filter(sym
));
584 run_sql(caller_info_callback
, data
,
585 "select %s from caller_info where %s order by call_id;",
586 cols
, get_static_filter(sym
));
589 void select_caller_info_hook(void (*callback
)(const char *name
, struct symbol
*sym
, char *key
, char *value
), int type
)
591 struct def_callback
*def_callback
= __alloc_def_callback(0);
593 def_callback
->hook_type
= type
;
594 def_callback
->callback
= callback
;
595 add_ptr_list(&select_caller_info_callbacks
, def_callback
);
599 * These call backs are used when the --info option is turned on to print struct
600 * member information. For example foo->bar could have a state in
601 * smatch_extra.c and also check_user.c.
603 void add_member_info_callback(int owner
, void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
605 struct member_info_callback
*member_callback
= __alloc_member_info_callback(0);
607 member_callback
->owner
= owner
;
608 member_callback
->callback
= callback
;
609 add_ptr_list(&member_callbacks
, member_callback
);
612 void add_split_return_callback(void (*fn
)(int return_id
, char *return_ranges
, struct expression
*returned_expr
))
614 struct returned_state_callback
*callback
= __alloc_returned_state_callback(0);
616 callback
->callback
= fn
;
617 add_ptr_list(&returned_state_callbacks
, callback
);
620 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
))
622 struct returned_member_callback
*member_callback
= __alloc_returned_member_callback(0);
624 member_callback
->owner
= owner
;
625 member_callback
->callback
= callback
;
626 add_ptr_list(&returned_member_callbacks
, member_callback
);
629 void select_call_implies_hook(int type
, void (*callback
)(struct expression
*call
, struct expression
*arg
, char *key
, char *value
))
631 struct call_implies_callback
*cb
= __alloc_call_implies_callback(0);
634 cb
->callback
= callback
;
635 add_ptr_list(&call_implies_cb_list
, cb
);
639 struct expression
*static_returns_call
;
640 struct symbol
*return_type
;
641 struct range_list
*return_range_list
;
644 static int db_return_callback(void *_ret_info
, int argc
, char **argv
, char **azColName
)
646 struct return_info
*ret_info
= _ret_info
;
647 struct range_list
*rl
;
648 struct expression
*call_expr
= ret_info
->static_returns_call
;
652 call_results_to_rl(call_expr
, ret_info
->return_type
, argv
[0], &rl
);
653 ret_info
->return_range_list
= rl_union(ret_info
->return_range_list
, rl
);
657 struct range_list
*db_return_vals(struct expression
*expr
)
659 struct return_info ret_info
= {};
663 if (is_fake_call(expr
))
666 snprintf(buf
, sizeof(buf
), "return %p", expr
);
667 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
669 return clone_rl(estate_rl(sm
->state
));
670 ret_info
.static_returns_call
= expr
;
671 ret_info
.return_type
= get_type(expr
);
672 if (!ret_info
.return_type
)
675 if (expr
->fn
->type
!= EXPR_SYMBOL
|| !expr
->fn
->symbol
)
678 ret_info
.return_range_list
= NULL
;
679 if (inlinable(expr
->fn
)) {
680 mem_sql(db_return_callback
, &ret_info
,
681 "select distinct return from return_states where call_id = '%lu';",
682 (unsigned long)expr
);
684 run_sql(db_return_callback
, &ret_info
,
685 "select distinct return from return_states where %s;",
686 get_static_filter(expr
->fn
->symbol
));
688 return ret_info
.return_range_list
;
691 struct range_list
*db_return_vals_from_str(const char *fn_name
)
693 struct return_info ret_info
;
695 ret_info
.static_returns_call
= NULL
;
696 ret_info
.return_type
= &llong_ctype
;
697 ret_info
.return_range_list
= NULL
;
699 run_sql(db_return_callback
, &ret_info
,
700 "select distinct return from return_states where function = '%s';",
702 return ret_info
.return_range_list
;
705 static void match_call_marker(struct expression
*expr
)
709 type
= get_type(expr
->fn
);
710 if (type
&& type
->type
== SYM_PTR
)
711 type
= get_real_base_type(type
);
714 * we just want to record something in the database so that if we have
715 * two calls like: frob(4); frob(some_unkown); then on the receiving
716 * side we know that sometimes frob is called with unknown parameters.
719 sql_insert_caller_info(expr
, INTERNAL
, -1, "%call_marker%", type_to_str(type
));
722 static char *show_offset(int offset
)
728 snprintf(buf
, sizeof(buf
), "(-%d)", offset
);
732 static void print_struct_members(struct expression
*call
, struct expression
*expr
, int param
, int offset
, struct stree
*stree
,
733 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
739 char printed_name
[256];
742 expr
= strip_expr(expr
);
745 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '&') {
746 expr
= strip_expr(expr
->unop
);
750 name
= expr_to_var_sym(expr
, &sym
);
755 FOR_EACH_SM(stree
, sm
) {
758 if (strcmp(name
, sm
->name
) == 0) {
760 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
761 else /* these are already handled. fixme: handle them here */
763 } else if (sm
->name
[0] == '*' && strcmp(name
, sm
->name
+ 1) == 0) {
764 snprintf(printed_name
, sizeof(printed_name
), "*$%s", show_offset(offset
));
765 } else if (strncmp(name
, sm
->name
, len
) == 0) {
766 if (isalnum(sm
->name
[len
]))
769 snprintf(printed_name
, sizeof(printed_name
), "$%s->%s", show_offset(offset
), sm
->name
+ len
+ 1);
771 snprintf(printed_name
, sizeof(printed_name
), "$%s%s", show_offset(offset
), sm
->name
+ len
);
775 callback(call
, param
, printed_name
, sm
);
776 } END_FOR_EACH_SM(sm
);
781 static int param_used_callback(void *_container
, int argc
, char **argv
, char **azColName
)
783 char **container
= _container
;
784 static char buf
[256];
786 snprintf(buf
, sizeof(buf
), "%s", argv
[0]);
791 static void print_container_struct_members(struct expression
*call
, struct expression
*expr
, int param
, struct stree
*stree
,
792 void (*callback
)(struct expression
*call
, int param
, char *printed_name
, struct sm_state
*sm
))
794 struct expression
*tmp
;
795 char *container
= NULL
;
800 if (!call
->fn
|| call
->fn
->type
!= EXPR_SYMBOL
)
804 * We can't use the in-mem DB because we have to parse the function
805 * first, then we know if it takes a container, then we know to pass it
806 * the container data.
809 run_sql(¶m_used_callback
, &container
,
810 "select key from call_implies where %s and type = %d and key like '%%$(%%' and parameter = %d limit 1;",
811 get_static_filter(call
->fn
->symbol
), CONTAINER
, param
);
815 p
= strchr(container
, '-');
824 tmp
= get_assigned_expr(expr
);
828 if (expr
->type
!= EXPR_PREOP
|| expr
->op
!= '&')
830 expr
= strip_expr(expr
->unop
);
831 holder_offset
= get_member_offset_from_deref(expr
);
832 if (-holder_offset
!= offset
)
835 expr
= strip_expr(expr
->deref
);
836 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '*')
837 expr
= strip_expr(expr
->unop
);
839 print_struct_members(call
, expr
, param
, holder_offset
, stree
, callback
);
842 static void match_call_info(struct expression
*call
)
844 struct member_info_callback
*cb
;
845 struct expression
*arg
;
850 name
= get_fnptr_name(call
->fn
);
854 FOR_EACH_PTR(member_callbacks
, cb
) {
855 stree
= get_all_states_stree(cb
->owner
);
857 FOR_EACH_PTR(call
->args
, arg
) {
858 print_struct_members(call
, arg
, i
, -1, stree
, cb
->callback
);
859 print_container_struct_members(call
, arg
, i
, stree
, cb
->callback
);
861 } END_FOR_EACH_PTR(arg
);
863 } END_FOR_EACH_PTR(cb
);
868 static int get_param(int param
, char **name
, struct symbol
**sym
)
874 FOR_EACH_PTR(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
876 * this is a temporary hack to work around a bug (I think in sparse?)
877 * 2.6.37-rc1:fs/reiserfs/journal.o
878 * If there is a function definition without parameter name found
879 * after a function implementation then it causes a crash.
883 if (arg
->ident
->name
< (char *)100)
886 *name
= arg
->ident
->name
;
891 } END_FOR_EACH_PTR(arg
);
896 static int function_signature_matches(const char *sig
)
900 my_sig
= function_signature();
902 return 1; /* default to matching */
903 if (strcmp(my_sig
, sig
) == 0)
908 static int caller_info_callback(void *_data
, int argc
, char **argv
, char **azColName
)
910 struct select_caller_info_data
*data
= _data
;
917 struct symbol
*sym
= NULL
;
918 struct def_callback
*def_callback
;
920 struct timeval cur_time
;
927 gettimeofday(&cur_time
, NULL
);
928 if (cur_time
.tv_sec
- data
->start_time
.tv_sec
> 10)
931 func_id
= atoi(argv
[0]);
933 type
= strtol(argv
[1], NULL
, 10);
934 param
= strtol(argv
[2], NULL
, 10);
940 if (data
->prev_func_id
== -1)
941 data
->prev_func_id
= func_id
;
942 if (func_id
!= data
->prev_func_id
) {
943 stree
= __pop_fake_cur_stree();
945 merge_stree(&data
->final_states
, stree
);
947 __push_fake_cur_stree();
949 data
->prev_func_id
= func_id
;
955 if (type
== INTERNAL
&&
956 !function_signature_matches(value
)) {
961 if (param
>= 0 && !get_param(param
, &name
, &sym
))
964 FOR_EACH_PTR(select_caller_info_callbacks
, def_callback
) {
965 if (def_callback
->hook_type
== type
)
966 def_callback
->callback(name
, sym
, key
, value
);
967 } END_FOR_EACH_PTR(def_callback
);
972 static struct string_list
*ptr_names_done
;
973 static struct string_list
*ptr_names
;
975 static int get_ptr_name(void *unused
, int argc
, char **argv
, char **azColName
)
977 insert_string(&ptr_names
, alloc_string(argv
[0]));
981 static char *get_next_ptr_name(void)
985 FOR_EACH_PTR(ptr_names
, ptr
) {
986 if (list_has_string(ptr_names_done
, ptr
))
988 insert_string(&ptr_names_done
, ptr
);
990 } END_FOR_EACH_PTR(ptr
);
994 static void get_ptr_names(const char *file
, const char *name
)
996 char sql_filter
[1024];
1000 snprintf(sql_filter
, 1024, "file = '%s' and function = '%s';",
1003 snprintf(sql_filter
, 1024, "function = '%s';", name
);
1006 before
= ptr_list_size((struct ptr_list
*)ptr_names
);
1008 run_sql(get_ptr_name
, NULL
,
1009 "select distinct ptr from function_ptr where %s",
1012 after
= ptr_list_size((struct ptr_list
*)ptr_names
);
1013 if (before
== after
)
1016 while ((name
= get_next_ptr_name()))
1017 get_ptr_names(NULL
, name
);
1020 static void match_data_from_db(struct symbol
*sym
)
1022 struct select_caller_info_data data
= { .prev_func_id
= -1 };
1023 struct sm_state
*sm
;
1024 struct stree
*stree
;
1025 struct timeval end_time
;
1027 if (!sym
|| !sym
->ident
)
1030 gettimeofday(&data
.start_time
, NULL
);
1032 __push_fake_cur_stree();
1038 if (sym
->ctype
.modifiers
& MOD_STATIC
)
1039 get_ptr_names(get_base_file(), sym
->ident
->name
);
1041 get_ptr_names(NULL
, sym
->ident
->name
);
1043 if (ptr_list_size((struct ptr_list
*)ptr_names
) > 20) {
1044 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1045 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1046 stree
= __pop_fake_cur_stree();
1051 sql_select_caller_info(&data
,
1052 "call_id, type, parameter, key, value",
1056 stree
= __pop_fake_cur_stree();
1058 merge_stree(&data
.final_states
, stree
);
1060 __push_fake_cur_stree();
1062 data
.prev_func_id
= -1;
1065 FOR_EACH_PTR(ptr_names
, ptr
) {
1066 run_sql(caller_info_callback
, &data
,
1067 "select call_id, type, parameter, key, value"
1068 " from common_caller_info where function = '%s' order by call_id",
1070 } END_FOR_EACH_PTR(ptr
);
1073 FOR_EACH_PTR(ptr_names
, ptr
) {
1075 } END_FOR_EACH_PTR(ptr
);
1076 goto free_ptr_names
;
1079 FOR_EACH_PTR(ptr_names
, ptr
) {
1080 run_sql(caller_info_callback
, &data
,
1081 "select call_id, type, parameter, key, value"
1082 " from caller_info where function = '%s' order by call_id",
1085 } END_FOR_EACH_PTR(ptr
);
1088 __free_ptr_list((struct ptr_list
**)&ptr_names
);
1089 __free_ptr_list((struct ptr_list
**)&ptr_names_done
);
1091 sql_select_caller_info(&data
,
1092 "call_id, type, parameter, key, value",
1096 stree
= __pop_fake_cur_stree();
1098 merge_stree(&data
.final_states
, stree
);
1101 gettimeofday(&end_time
, NULL
);
1102 if (end_time
.tv_sec
- data
.start_time
.tv_sec
<= 10) {
1103 FOR_EACH_SM(data
.final_states
, sm
) {
1105 } END_FOR_EACH_SM(sm
);
1108 free_stree(&data
.final_states
);
1111 static int call_implies_callbacks(void *_call
, int argc
, char **argv
, char **azColName
)
1113 struct expression
*call_expr
= _call
;
1114 struct call_implies_callback
*cb
;
1115 struct expression
*arg
= NULL
;
1122 type
= atoi(argv
[1]);
1123 param
= atoi(argv
[2]);
1125 FOR_EACH_PTR(call_implies_cb_list
, cb
) {
1126 if (cb
->type
!= type
)
1129 arg
= get_argument_from_call_expr(call_expr
->args
, param
);
1133 cb
->callback(call_expr
, arg
, argv
[3], argv
[4]);
1134 } END_FOR_EACH_PTR(cb
);
1139 static void match_call_implies(struct expression
*expr
)
1141 sql_select_call_implies("function, type, parameter, key, value", expr
,
1142 call_implies_callbacks
);
1145 static void print_initializer_list(struct expression_list
*expr_list
,
1146 struct symbol
*struct_type
)
1148 struct expression
*expr
;
1149 struct symbol
*base_type
;
1150 char struct_name
[256];
1152 FOR_EACH_PTR(expr_list
, expr
) {
1153 if (expr
->type
== EXPR_INDEX
&& expr
->idx_expression
&& expr
->idx_expression
->type
== EXPR_INITIALIZER
) {
1154 print_initializer_list(expr
->idx_expression
->expr_list
, struct_type
);
1157 if (expr
->type
!= EXPR_IDENTIFIER
)
1159 if (!expr
->expr_ident
)
1161 if (!expr
->ident_expression
|| !expr
->ident_expression
->symbol_name
)
1163 base_type
= get_type(expr
->ident_expression
);
1164 if (!base_type
|| base_type
->type
!= SYM_FN
)
1166 snprintf(struct_name
, sizeof(struct_name
), "(struct %s)->%s",
1167 struct_type
->ident
->name
, expr
->expr_ident
->name
);
1168 sql_insert_function_ptr(expr
->ident_expression
->symbol_name
->name
,
1170 } END_FOR_EACH_PTR(expr
);
1173 static void global_variable(struct symbol
*sym
)
1175 struct symbol
*struct_type
;
1179 if (!sym
->initializer
|| sym
->initializer
->type
!= EXPR_INITIALIZER
)
1181 struct_type
= get_base_type(sym
);
1184 if (struct_type
->type
== SYM_ARRAY
) {
1185 struct_type
= get_base_type(struct_type
);
1189 if (struct_type
->type
!= SYM_STRUCT
|| !struct_type
->ident
)
1191 print_initializer_list(sym
->initializer
->expr_list
, struct_type
);
1194 static void match_return_info(int return_id
, char *return_ranges
, struct expression
*expr
)
1196 sql_insert_return_states(return_id
, return_ranges
, INTERNAL
, -1, "", function_signature());
1199 static void call_return_state_hooks_conditional(struct expression
*expr
)
1201 struct returned_state_callback
*cb
;
1202 struct range_list
*rl
;
1203 char *return_ranges
;
1204 int final_pass_orig
= final_pass
;
1206 __push_fake_cur_stree();
1209 __split_whole_condition(expr
->conditional
);
1210 final_pass
= final_pass_orig
;
1212 if (get_implied_rl(expr
->cond_true
, &rl
))
1213 rl
= cast_rl(cur_func_return_type(), rl
);
1215 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_true
)));
1216 return_ranges
= show_rl(rl
);
1217 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1220 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1221 cb
->callback(return_id
, return_ranges
, expr
->cond_true
);
1222 } END_FOR_EACH_PTR(cb
);
1224 __push_true_states();
1225 __use_false_states();
1227 if (get_implied_rl(expr
->cond_false
, &rl
))
1228 rl
= cast_rl(cur_func_return_type(), rl
);
1230 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
->cond_false
)));
1231 return_ranges
= show_rl(rl
);
1232 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(rl
));
1235 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1236 cb
->callback(return_id
, return_ranges
, expr
->cond_false
);
1237 } END_FOR_EACH_PTR(cb
);
1239 __merge_true_states();
1240 __free_fake_cur_stree();
1243 static void call_return_state_hooks_compare(struct expression
*expr
)
1245 struct returned_state_callback
*cb
;
1246 char *return_ranges
;
1247 int final_pass_orig
= final_pass
;
1248 sval_t sval
= { .type
= &int_ctype
};
1251 if (!get_implied_value(expr
, &ret
))
1254 __push_fake_cur_stree();
1257 __split_whole_condition(expr
);
1258 final_pass
= final_pass_orig
;
1260 if (ret
.value
!= 0) {
1261 return_ranges
= alloc_sname("1");
1263 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1266 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1267 cb
->callback(return_id
, return_ranges
, expr
);
1268 } END_FOR_EACH_PTR(cb
);
1271 __push_true_states();
1272 __use_false_states();
1274 if (ret
.value
!= 1) {
1275 return_ranges
= alloc_sname("0");
1277 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_sval(sval
));
1280 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1281 cb
->callback(return_id
, return_ranges
, expr
);
1282 } END_FOR_EACH_PTR(cb
);
1285 __merge_true_states();
1286 __free_fake_cur_stree();
1289 static int ptr_in_list(struct sm_state
*sm
, struct state_list
*slist
)
1291 struct sm_state
*tmp
;
1293 FOR_EACH_PTR(slist
, tmp
) {
1294 if (strcmp(tmp
->state
->name
, sm
->state
->name
) == 0)
1296 } END_FOR_EACH_PTR(tmp
);
1301 static char *get_return_compare_str(struct expression
*expr
)
1309 compare_str
= expr_lte_to_param(expr
, -1);
1312 param
= get_param_num(expr
);
1316 var
= expr_to_var(expr
);
1319 snprintf(buf
, sizeof(buf
), "%s orig", var
);
1320 comparison
= get_comparison_strings(var
, buf
);
1326 snprintf(buf
, sizeof(buf
), "[%s$%d]", show_special(comparison
), param
);
1327 return alloc_sname(buf
);
1330 static int split_possible_helper(struct sm_state
*sm
, struct expression
*expr
)
1332 struct returned_state_callback
*cb
;
1333 struct range_list
*rl
;
1334 char *return_ranges
;
1335 struct sm_state
*tmp
;
1337 int nr_possible
, nr_states
;
1338 char *compare_str
= NULL
;
1340 struct state_list
*already_handled
= NULL
;
1342 if (!sm
|| !sm
->merged
)
1345 if (too_many_possible(sm
))
1348 /* bail if it gets too complicated */
1349 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1350 nr_states
= stree_count(__get_cur_stree());
1351 if (nr_states
* nr_possible
>= 2000)
1354 FOR_EACH_PTR(sm
->possible
, tmp
) {
1357 if (ptr_in_list(tmp
, already_handled
))
1359 add_ptr_list(&already_handled
, tmp
);
1362 __push_fake_cur_stree();
1364 overwrite_states_using_pool(sm
, tmp
);
1366 rl
= cast_rl(cur_func_return_type(), estate_rl(tmp
->state
));
1367 return_ranges
= show_rl(rl
);
1368 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(clone_rl(rl
)));
1369 compare_str
= get_return_compare_str(expr
);
1371 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1372 return_ranges
= alloc_sname(buf
);
1376 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1377 cb
->callback(return_id
, return_ranges
, expr
);
1378 } END_FOR_EACH_PTR(cb
);
1380 __free_fake_cur_stree();
1381 } END_FOR_EACH_PTR(tmp
);
1383 free_slist(&already_handled
);
1388 static int call_return_state_hooks_split_possible(struct expression
*expr
)
1390 struct sm_state
*sm
;
1392 if (!expr
|| expr_equal_to_param(expr
, -1))
1395 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1396 return split_possible_helper(sm
, expr
);
1399 static const char *get_return_ranges_str(struct expression
*expr
, struct range_list
**rl_p
)
1401 struct range_list
*rl
;
1402 char *return_ranges
;
1411 return alloc_sname("");
1413 if (get_implied_value(expr
, &sval
)) {
1414 sval
= sval_cast(cur_func_return_type(), sval
);
1415 *rl_p
= alloc_rl(sval
, sval
);
1416 return sval_to_str(sval
);
1419 compare_str
= expr_equal_to_param(expr
, -1);
1420 math_str
= get_value_in_terms_of_parameter_math(expr
);
1422 if (get_implied_rl(expr
, &rl
)) {
1423 rl
= cast_rl(cur_func_return_type(), rl
);
1424 return_ranges
= show_rl(rl
);
1425 } else if (get_imaginary_absolute(expr
, &rl
)){
1426 rl
= cast_rl(cur_func_return_type(), rl
);
1427 return alloc_sname(show_rl(rl
));
1429 rl
= cast_rl(cur_func_return_type(), alloc_whole_rl(get_type(expr
)));
1430 return_ranges
= show_rl(rl
);
1435 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1436 return alloc_sname(buf
);
1439 snprintf(buf
, sizeof(buf
), "%s[%s]", return_ranges
, math_str
);
1440 return alloc_sname(buf
);
1442 compare_str
= get_return_compare_str(expr
);
1444 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1445 return alloc_sname(buf
);
1448 return return_ranges
;
1451 static int split_positive_from_negative(struct expression
*expr
)
1453 struct returned_state_callback
*cb
;
1454 struct range_list
*rl
;
1455 const char *return_ranges
;
1456 struct range_list
*ret_rl
;
1459 /* We're going to print the states 3 times */
1460 if (stree_count(__get_cur_stree()) > 10000 / 3)
1463 if (!get_implied_rl(expr
, &rl
) || !rl
)
1465 if (is_whole_rl(rl
) || is_whole_rl_non_zero(rl
))
1467 /* Forget about INT_MAX and larger */
1468 if (rl_max(rl
).value
<= 0)
1470 if (!sval_is_negative(rl_min(rl
)))
1473 if (!assume(compare_expression(expr
, '>', zero_expr())))
1477 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1478 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1479 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1480 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1481 } END_FOR_EACH_PTR(cb
);
1485 if (rl_has_sval(rl
, sval_type_val(rl_type(rl
), 0))) {
1486 undo
= assume(compare_expression(expr
, SPECIAL_EQUAL
, zero_expr()));
1489 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1490 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1491 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1492 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1493 } END_FOR_EACH_PTR(cb
);
1499 undo
= assume(compare_expression(expr
, '<', zero_expr()));
1502 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1503 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1504 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1505 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1506 } END_FOR_EACH_PTR(cb
);
1514 static int call_return_state_hooks_split_null_non_null(struct expression
*expr
)
1516 struct returned_state_callback
*cb
;
1517 struct range_list
*rl
;
1518 struct range_list
*nonnull_rl
;
1520 struct range_list
*null_rl
= NULL
;
1521 char *return_ranges
;
1522 struct sm_state
*sm
;
1523 struct smatch_state
*state
;
1525 int final_pass_orig
= final_pass
;
1527 if (!expr
|| expr_equal_to_param(expr
, -1))
1529 if (expr
->type
== EXPR_CALL
)
1531 if (!is_pointer(expr
))
1534 sm
= get_sm_state_expr(SMATCH_EXTRA
, expr
);
1537 if (ptr_list_size((struct ptr_list
*)sm
->possible
) == 1)
1540 if (!estate_rl(state
))
1542 if (estate_min(state
).value
== 0 && estate_max(state
).value
== 0)
1544 if (!rl_has_sval(estate_rl(state
), sval_type_val(estate_type(state
), 0)))
1547 nr_states
= stree_count(__get_cur_stree());
1548 if (option_info
&& nr_states
>= 1500)
1551 rl
= estate_rl(state
);
1553 __push_fake_cur_stree();
1556 __split_whole_condition(expr
);
1557 final_pass
= final_pass_orig
;
1559 nonnull_rl
= rl_filter(rl
, rl_zero());
1560 return_ranges
= show_rl(nonnull_rl
);
1561 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonnull_rl
));
1564 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1565 cb
->callback(return_id
, return_ranges
, expr
);
1566 } END_FOR_EACH_PTR(cb
);
1568 __push_true_states();
1569 __use_false_states();
1571 return_ranges
= alloc_sname("0");
1572 null_sval
= sval_type_val(rl_type(rl
), 0);
1573 add_range(&null_rl
, null_sval
, null_sval
);
1574 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(null_rl
));
1576 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1577 cb
->callback(return_id
, return_ranges
, expr
);
1578 } END_FOR_EACH_PTR(cb
);
1580 __merge_true_states();
1581 __free_fake_cur_stree();
1586 static int call_return_state_hooks_split_success_fail(struct expression
*expr
)
1588 struct range_list
*rl
;
1589 struct range_list
*nonzero_rl
;
1591 struct range_list
*zero_rl
= NULL
;
1593 struct returned_state_callback
*cb
;
1594 char *return_ranges
;
1595 int final_pass_orig
= final_pass
;
1598 if (option_project
!= PROJ_KERNEL
)
1601 nr_states
= stree_count(__get_cur_stree());
1602 if (nr_states
> 1500)
1605 if (get_value(expr
, &val
))
1607 if (!get_implied_rl(expr
, &rl
))
1609 if (rl_min(rl
).value
< -4095 || rl_min(rl
).value
>= 0)
1611 if (rl_max(rl
).value
!= 0)
1614 __push_fake_cur_stree();
1617 __split_whole_condition(expr
);
1618 final_pass
= final_pass_orig
;
1620 nonzero_rl
= rl_filter(rl
, rl_zero());
1621 return_ranges
= show_rl(nonzero_rl
);
1622 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(nonzero_rl
));
1625 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1626 cb
->callback(return_id
, return_ranges
, expr
);
1627 } END_FOR_EACH_PTR(cb
);
1629 __push_true_states();
1630 __use_false_states();
1632 return_ranges
= alloc_sname("0");
1633 zero_sval
= sval_type_val(rl_type(rl
), 0);
1634 add_range(&zero_rl
, zero_sval
, zero_sval
);
1635 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(zero_rl
));
1637 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1638 cb
->callback(return_id
, return_ranges
, expr
);
1639 } END_FOR_EACH_PTR(cb
);
1641 __merge_true_states();
1642 __free_fake_cur_stree();
1647 static int is_boolean(struct expression
*expr
)
1649 struct range_list
*rl
;
1651 if (!get_implied_rl(expr
, &rl
))
1653 if (rl_min(rl
).value
== 0 && rl_max(rl
).value
== 1)
1658 static int is_conditional(struct expression
*expr
)
1662 if (expr
->type
== EXPR_CONDITIONAL
|| expr
->type
== EXPR_SELECT
)
1667 static int splitable_function_call(struct expression
*expr
)
1669 struct sm_state
*sm
;
1672 if (!expr
|| expr
->type
!= EXPR_CALL
)
1674 snprintf(buf
, sizeof(buf
), "return %p", expr
);
1675 sm
= get_sm_state(SMATCH_EXTRA
, buf
, NULL
);
1676 return split_possible_helper(sm
, expr
);
1679 static struct sm_state
*find_bool_param(void)
1681 struct stree
*start_states
;
1683 struct sm_state
*sm
, *tmp
;
1686 start_states
= get_start_states();
1688 FOR_EACH_PTR_REVERSE(cur_func_sym
->ctype
.base_type
->arguments
, arg
) {
1691 sm
= get_sm_state_stree(start_states
, SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1694 if (rl_min(estate_rl(sm
->state
)).value
!= 0 ||
1695 rl_max(estate_rl(sm
->state
)).value
!= 1)
1698 } END_FOR_EACH_PTR_REVERSE(arg
);
1704 * Check if it's splitable. If not, then splitting it up is likely not
1705 * useful for the callers.
1707 FOR_EACH_PTR(sm
->possible
, tmp
) {
1710 if (!estate_get_single_value(tmp
->state
, &sval
))
1712 } END_FOR_EACH_PTR(tmp
);
1717 static int split_on_bool_sm(struct sm_state
*sm
, struct expression
*expr
)
1719 struct returned_state_callback
*cb
;
1720 struct range_list
*ret_rl
;
1721 const char *return_ranges
;
1722 struct sm_state
*tmp
;
1724 int nr_possible
, nr_states
;
1725 char *compare_str
= NULL
;
1727 struct state_list
*already_handled
= NULL
;
1729 if (!sm
|| !sm
->merged
)
1732 if (too_many_possible(sm
))
1735 /* bail if it gets too complicated */
1736 nr_possible
= ptr_list_size((struct ptr_list
*)sm
->possible
);
1737 nr_states
= stree_count(__get_cur_stree());
1738 if (nr_states
* nr_possible
>= 2000)
1741 FOR_EACH_PTR(sm
->possible
, tmp
) {
1744 if (ptr_in_list(tmp
, already_handled
))
1746 add_ptr_list(&already_handled
, tmp
);
1749 __push_fake_cur_stree();
1751 overwrite_states_using_pool(sm
, tmp
);
1753 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1754 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1755 compare_str
= get_return_compare_str(expr
);
1757 snprintf(buf
, sizeof(buf
), "%s%s", return_ranges
, compare_str
);
1758 return_ranges
= alloc_sname(buf
);
1762 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1763 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1764 } END_FOR_EACH_PTR(cb
);
1766 __free_fake_cur_stree();
1767 } END_FOR_EACH_PTR(tmp
);
1769 free_slist(&already_handled
);
1774 static int split_by_bool_param(struct expression
*expr
)
1776 struct sm_state
*start_sm
, *sm
;
1779 start_sm
= find_bool_param();
1782 sm
= get_sm_state(SMATCH_EXTRA
, start_sm
->name
, start_sm
->sym
);
1783 if (!sm
|| estate_get_single_value(sm
->state
, &sval
))
1785 return split_on_bool_sm(sm
, expr
);
1788 static int split_by_null_nonnull_param(struct expression
*expr
)
1791 struct sm_state
*sm
;
1793 .type
= &ulong_ctype
,
1796 /* function must only take one pointer */
1797 if (ptr_list_size((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
) != 1)
1799 arg
= first_ptr_list((struct ptr_list
*)cur_func_sym
->ctype
.base_type
->arguments
);
1802 if (get_real_base_type(arg
)->type
!= SYM_PTR
)
1805 if (param_was_set_var_sym(arg
->ident
->name
, arg
))
1807 sm
= get_sm_state(SMATCH_EXTRA
, arg
->ident
->name
, arg
);
1811 if (!rl_has_sval(estate_rl(sm
->state
), zero
))
1814 return split_on_bool_sm(sm
, expr
);
1817 struct expression
*strip_expr_statement(struct expression
*expr
)
1819 struct expression
*orig
= expr
;
1820 struct statement
*stmt
, *last_stmt
;
1824 if (expr
->type
== EXPR_PREOP
&& expr
->op
== '(')
1826 if (expr
->type
!= EXPR_STATEMENT
)
1828 stmt
= expr
->statement
;
1829 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
1832 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
1833 if (!last_stmt
|| last_stmt
->type
== STMT_LABEL
)
1834 last_stmt
= last_stmt
->label_statement
;
1835 if (!last_stmt
|| last_stmt
->type
!= STMT_EXPRESSION
)
1837 return strip_expr(last_stmt
->expression
);
1840 static void call_return_state_hooks(struct expression
*expr
)
1842 struct returned_state_callback
*cb
;
1843 struct range_list
*ret_rl
;
1844 const char *return_ranges
;
1848 if (__path_is_null())
1851 expr
= strip_expr(expr
);
1852 expr
= strip_expr_statement(expr
);
1854 if (is_impossible_path())
1857 if (expr
&& (expr
->type
== EXPR_COMPARE
||
1858 !get_implied_value(expr
, &sval
)) &&
1859 (is_condition(expr
) || is_boolean(expr
))) {
1860 call_return_state_hooks_compare(expr
);
1862 } else if (is_conditional(expr
)) {
1863 call_return_state_hooks_conditional(expr
);
1865 } else if (call_return_state_hooks_split_possible(expr
)) {
1867 } else if (call_return_state_hooks_split_null_non_null(expr
)) {
1869 } else if (call_return_state_hooks_split_success_fail(expr
)) {
1871 } else if (splitable_function_call(expr
)) {
1873 } else if (split_positive_from_negative(expr
)) {
1875 } else if (split_by_bool_param(expr
)) {
1876 } else if (split_by_null_nonnull_param(expr
)) {
1881 return_ranges
= get_return_ranges_str(expr
, &ret_rl
);
1882 set_state(RETURN_ID
, "return_ranges", NULL
, alloc_estate_rl(ret_rl
));
1885 nr_states
= stree_count(__get_cur_stree());
1886 if (nr_states
>= 10000) {
1887 match_return_info(return_id
, (char *)return_ranges
, expr
);
1890 FOR_EACH_PTR(returned_state_callbacks
, cb
) {
1891 cb
->callback(return_id
, (char *)return_ranges
, expr
);
1892 } END_FOR_EACH_PTR(cb
);
1895 static void print_returned_struct_members(int return_id
, char *return_ranges
, struct expression
*expr
)
1897 struct returned_member_callback
*cb
;
1898 struct stree
*stree
;
1899 struct sm_state
*sm
;
1900 struct symbol
*type
;
1902 char member_name
[256];
1905 type
= get_type(expr
);
1906 if (!type
|| type
->type
!= SYM_PTR
)
1908 name
= expr_to_var(expr
);
1912 member_name
[sizeof(member_name
) - 1] = '\0';
1913 strcpy(member_name
, "$");
1916 FOR_EACH_PTR(returned_member_callbacks
, cb
) {
1917 stree
= __get_cur_stree();
1918 FOR_EACH_MY_SM(cb
->owner
, stree
, sm
) {
1919 if (sm
->name
[0] == '*' && strcmp(sm
->name
+ 1, name
) == 0) {
1920 strcpy(member_name
, "*$");
1921 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1924 if (strncmp(sm
->name
, name
, len
) != 0)
1926 if (strncmp(sm
->name
+ len
, "->", 2) != 0)
1928 snprintf(member_name
, sizeof(member_name
), "$%s", sm
->name
+ len
);
1929 cb
->callback(return_id
, return_ranges
, expr
, member_name
, sm
->state
);
1930 } END_FOR_EACH_SM(sm
);
1931 } END_FOR_EACH_PTR(cb
);
1936 static void reset_memdb(struct symbol
*sym
)
1938 mem_sql(NULL
, NULL
, "delete from caller_info;");
1939 mem_sql(NULL
, NULL
, "delete from return_states;");
1940 mem_sql(NULL
, NULL
, "delete from call_implies;");
1943 static void match_end_func_info(struct symbol
*sym
)
1945 if (__path_is_null())
1947 call_return_state_hooks(NULL
);
1950 static void match_after_func(struct symbol
*sym
)
1956 static void init_memdb(void)
1960 const char *schema_files
[] = {
1962 "db/caller_info.schema",
1963 "db/return_states.schema",
1964 "db/function_type_size.schema",
1965 "db/type_size.schema",
1966 "db/call_implies.schema",
1967 "db/function_ptr.schema",
1968 "db/local_values.schema",
1969 "db/function_type_value.schema",
1970 "db/type_value.schema",
1971 "db/function_type.schema",
1972 "db/data_info.schema",
1973 "db/parameter_name.schema",
1974 "db/constraints.schema",
1975 "db/constraints_required.schema",
1976 "db/fn_ptr_data_link.schema",
1977 "db/fn_data_link.schema",
1978 "db/mtag_about.schema",
1979 "db/mtag_map.schema",
1980 "db/mtag_data.schema",
1981 "db/mtag_alias.schema",
1983 static char buf
[4096];
1988 rc
= sqlite3_open(":memory:", &mem_db
);
1989 if (rc
!= SQLITE_OK
) {
1990 printf("Error starting In-Memory database.");
1994 for (i
= 0; i
< ARRAY_SIZE(schema_files
); i
++) {
1995 fd
= open_data_file(schema_files
[i
]);
1997 printf("failed to open: %s\n", schema_files
[i
]);
2000 ret
= read(fd
, buf
, sizeof(buf
));
2002 printf("failed to read: %s\n", schema_files
[i
]);
2006 if (ret
== sizeof(buf
)) {
2007 printf("Schema file too large: %s (limit %zd bytes)",
2008 schema_files
[i
], sizeof(buf
));
2012 rc
= sqlite3_exec(mem_db
, buf
, NULL
, NULL
, &err
);
2013 if (rc
!= SQLITE_OK
) {
2014 fprintf(stderr
, "SQL error #2: %s\n", err
);
2015 fprintf(stderr
, "%s\n", buf
);
2020 void open_smatch_db(void)
2029 rc
= sqlite3_open_v2("smatch_db.sqlite", &db
, SQLITE_OPEN_READONLY
, NULL
);
2030 if (rc
!= SQLITE_OK
) {
2037 static void register_common_funcs(void)
2039 struct token
*token
;
2043 if (option_project
== PROJ_NONE
)
2044 strcpy(filename
, "common_functions");
2046 snprintf(filename
, 256, "%s.common_functions", option_project_str
);
2048 token
= get_tokens_file(filename
);
2051 if (token_type(token
) != TOKEN_STREAMBEGIN
)
2053 token
= token
->next
;
2054 while (token_type(token
) != TOKEN_STREAMEND
) {
2055 if (token_type(token
) != TOKEN_IDENT
)
2057 func
= alloc_string(show_ident(token
->ident
));
2058 add_ptr_list(&common_funcs
, func
);
2059 token
= token
->next
;
2061 clear_token_alloc();
2064 static char *get_next_string(char **str
)
2066 static char string
[256];
2075 while (*p
!= '\0' && *p
!= ' ' && *p
!= '\n')
2080 memcpy(string
, start
, 255);
2082 printf("return_fix: '%s' too long", string
);
2086 memcpy(string
, start
, len
);
2094 static void register_return_replacements(void)
2096 char *func
, *orig
, *new;
2102 snprintf(filename
, 256, "db/%s.return_fixes", option_project_str
);
2103 fd
= open_data_file(filename
);
2106 ret
= read(fd
, buf
, sizeof(buf
));
2110 if (ret
== sizeof(buf
)) {
2111 printf("file too large: %s (limit %zd bytes)",
2112 filename
, sizeof(buf
));
2119 get_next_string(&p
);
2122 if (replace_count
== 0 || replace_count
% 3 != 0) {
2126 replace_table
= malloc(replace_count
* sizeof(char *));
2131 func
= alloc_string(get_next_string(&p
));
2132 orig
= alloc_string(get_next_string(&p
));
2133 new = alloc_string(get_next_string(&p
));
2135 replace_table
[i
++] = func
;
2136 replace_table
[i
++] = orig
;
2137 replace_table
[i
++] = new;
2141 void register_definition_db_callbacks(int id
)
2143 add_hook(&match_call_info
, FUNCTION_CALL_HOOK
);
2144 add_hook(&global_variable
, BASE_HOOK
);
2145 add_hook(&global_variable
, DECLARATION_HOOK
);
2146 add_split_return_callback(match_return_info
);
2147 add_split_return_callback(print_returned_struct_members
);
2148 add_hook(&call_return_state_hooks
, RETURN_HOOK
);
2149 add_hook(&match_end_func_info
, END_FUNC_HOOK
);
2150 add_hook(&match_after_func
, AFTER_FUNC_HOOK
);
2152 add_hook(&match_data_from_db
, FUNC_DEF_HOOK
);
2153 add_hook(&match_call_implies
, CALL_HOOK_AFTER_INLINE
);
2155 register_common_funcs();
2156 register_return_replacements();
2159 void register_db_call_marker(int id
)
2161 add_hook(&match_call_marker
, FUNCTION_CALL_HOOK
);
2164 char *return_state_to_var_sym(struct expression
*expr
, int param
, const char *key
, struct symbol
**sym
)
2166 struct expression
*arg
;
2168 char member_name
[256];
2173 const char *star
= "";
2175 if (expr
->type
!= EXPR_ASSIGNMENT
)
2177 name
= expr_to_var_sym(expr
->left
, sym
);
2180 if (key
[0] == '*') {
2184 if (strncmp(key
, "$", 1) != 0)
2186 snprintf(member_name
, sizeof(member_name
), "%s%s%s", star
, name
, key
+ 1);
2188 return alloc_string(member_name
);
2191 while (expr
->type
== EXPR_ASSIGNMENT
)
2192 expr
= strip_expr(expr
->right
);
2193 if (expr
->type
!= EXPR_CALL
)
2196 arg
= get_argument_from_call_expr(expr
->args
, param
);
2200 return get_variable_from_key(arg
, key
, sym
);
2203 char *get_variable_from_key(struct expression
*arg
, const char *key
, struct symbol
**sym
)
2211 arg
= strip_expr(arg
);
2213 if (strcmp(key
, "$") == 0)
2214 return expr_to_var_sym(arg
, sym
);
2216 if (strcmp(key
, "*$") == 0) {
2217 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2218 arg
= strip_expr(arg
->unop
);
2219 return expr_to_var_sym(arg
, sym
);
2221 tmp
= expr_to_var_sym(arg
, sym
);
2224 snprintf(buf
, sizeof(buf
), "*%s", tmp
);
2226 return alloc_string(buf
);
2230 if (arg
->type
== EXPR_PREOP
&& arg
->op
== '&') {
2231 arg
= strip_expr(arg
->unop
);
2232 tmp
= expr_to_var_sym(arg
, sym
);
2235 snprintf(buf
, sizeof(buf
), "%s.%s", tmp
, key
+ 3);
2236 return alloc_string(buf
);
2239 tmp
= expr_to_var_sym(arg
, sym
);
2242 snprintf(buf
, sizeof(buf
), "%s%s", tmp
, key
+ 1);
2244 return alloc_string(buf
);
2247 char *get_chunk_from_key(struct expression
*arg
, char *key
, struct symbol
**sym
, struct var_sym_list
**vsl
)
2251 if (strcmp("$", key
) == 0)
2252 return expr_to_chunk_sym_vsl(arg
, sym
, vsl
);
2253 return get_variable_from_key(arg
, key
, sym
);
2256 const char *state_name_to_param_name(const char *state_name
, const char *param_name
)
2259 static char buf
[256];
2261 name_len
= strlen(param_name
);
2263 if (strcmp(state_name
, param_name
) == 0) {
2265 } else if (state_name
[name_len
] == '-' && /* check for '-' from "->" */
2266 strncmp(state_name
, param_name
, name_len
) == 0) {
2267 snprintf(buf
, sizeof(buf
), "$%s", state_name
+ name_len
);
2269 } else if (state_name
[0] == '*' && strcmp(state_name
+ 1, param_name
) == 0) {
2275 const char *get_param_name_var_sym(const char *name
, struct symbol
*sym
)
2277 if (!sym
|| !sym
->ident
)
2280 return state_name_to_param_name(name
, sym
->ident
->name
);
2283 const char *get_mtag_name_var_sym(const char *state_name
, struct symbol
*sym
)
2285 struct symbol
*type
;
2286 const char *sym_name
;
2288 static char buf
[256];
2291 * mtag_name is different from param_name because mtags can be a struct
2292 * instead of a struct pointer. But we want to treat it like a pointer
2293 * because really an mtag is a pointer. Or in other words, if you pass
2294 * a struct foo then you want to talk about foo.bar but with an mtag
2295 * you want to refer to it as foo->bar.
2299 if (!sym
|| !sym
->ident
)
2302 type
= get_real_base_type(sym
);
2303 if (type
&& type
->type
== SYM_BASETYPE
)
2306 sym_name
= sym
->ident
->name
;
2307 name_len
= strlen(sym_name
);
2309 if (state_name
[name_len
] == '.' && /* check for '-' from "->" */
2310 strncmp(state_name
, sym_name
, name_len
) == 0) {
2311 snprintf(buf
, sizeof(buf
), "$->%s", state_name
+ name_len
+ 1);
2315 return state_name_to_param_name(state_name
, sym_name
);
2318 const char *get_mtag_name_expr(struct expression
*expr
)
2322 const char *ret
= NULL
;
2324 name
= expr_to_var_sym(expr
, &sym
);
2328 ret
= get_mtag_name_var_sym(name
, sym
);
2334 const char *get_param_name(struct sm_state
*sm
)
2336 return get_param_name_var_sym(sm
->name
, sm
->sym
);
2339 char *get_data_info_name(struct expression
*expr
)
2346 expr
= strip_expr(expr
);
2347 name
= get_member_name(expr
);
2350 name
= expr_to_var_sym(expr
, &sym
);
2353 if (!(sym
->ctype
.modifiers
& MOD_TOPLEVEL
))
2355 if (sym
->ctype
.modifiers
& MOD_STATIC
)
2356 snprintf(buf
, sizeof(buf
), "static %s", name
);
2358 snprintf(buf
, sizeof(buf
), "global %s", name
);
2359 ret
= alloc_sname(buf
);