2 * Copyright (C) 2006,2008 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_expression_stacks.h"
25 #include "smatch_extra.h"
26 #include "smatch_slist.h"
29 int __in_fake_struct_assign
;
30 int __in_fake_var_assign
;
35 struct expression
*__inline_fn
;
37 static int __smatch_lineno
= 0;
39 static char *base_file
;
40 static const char *filename
;
41 static char *pathname
;
42 static char *full_filename
;
43 static char *full_base_file
;
44 static char *cur_func
;
45 static unsigned int loop_count
;
46 static int last_goto_statement_handled
;
47 int __expr_stmt_count
;
48 int __in_function_def
;
49 int __in_unmatched_hook
;
50 static struct expression_list
*switch_expr_stack
= NULL
;
51 static struct expression_list
*post_op_stack
= NULL
;
53 static struct ptr_list
*fn_data_list
;
54 static struct ptr_list
*backup
;
56 struct expression_list
*big_expression_stack
;
57 struct statement_list
*big_statement_stack
;
58 struct statement
*__prev_stmt
;
59 struct statement
*__cur_stmt
;
60 struct statement
*__next_stmt
;
61 int __in_pre_condition
= 0;
62 int __bail_on_rest_of_function
= 0;
63 static struct timeval fn_start_time
;
64 static struct timeval outer_fn_start_time
;
65 char *get_function(void) { return cur_func
; }
66 int get_lineno(void) { return __smatch_lineno
; }
67 int inside_loop(void) { return !!loop_count
; }
68 int definitely_inside_loop(void) { return !!(loop_count
& ~0x08000000); }
69 struct expression
*get_switch_expr(void) { return top_expression(switch_expr_stack
); }
70 int in_expression_statement(void) { return !!__expr_stmt_count
; }
72 static void split_symlist(struct symbol_list
*sym_list
);
73 static void split_declaration(struct symbol_list
*sym_list
);
74 static void split_expr_list(struct expression_list
*expr_list
, struct expression
*parent
);
75 static void split_args(struct expression
*expr
);
76 static struct expression
*fake_a_variable_assign(struct symbol
*type
, struct expression
*call
, struct expression
*expr
, int nr
);
77 static void add_inline_function(struct symbol
*sym
);
78 static void parse_inline(struct expression
*expr
);
80 int option_assume_loops
= 0;
81 int option_two_passes
= 0;
82 struct symbol
*cur_func_sym
= NULL
;
83 struct stree
*global_states
;
85 const unsigned long valid_ptr_min
= 4096;
86 unsigned long valid_ptr_max
= ULONG_MAX
& ~(MTAG_OFFSET_MASK
);
87 const sval_t valid_ptr_min_sval
= {
91 sval_t valid_ptr_max_sval
= {
93 {.value
= ULONG_MAX
& ~(MTAG_OFFSET_MASK
)},
95 struct range_list
*valid_ptr_rl
;
97 void alloc_valid_ptr_rl(void)
99 valid_ptr_max
= sval_type_max(&ulong_ctype
).value
& ~(MTAG_OFFSET_MASK
);
100 valid_ptr_max_sval
.value
= valid_ptr_max
;
102 valid_ptr_rl
= alloc_rl(valid_ptr_min_sval
, valid_ptr_max_sval
);
103 valid_ptr_rl
= cast_rl(&ptr_ctype
, valid_ptr_rl
);
104 valid_ptr_rl
= clone_rl_permanent(valid_ptr_rl
);
107 int outside_of_function(void)
109 return cur_func_sym
== NULL
;
112 const char *get_filename(void)
114 if (option_info
&& option_full_path
)
115 return full_base_file
;
118 if (option_full_path
)
119 return full_filename
;
123 const char *get_base_file(void)
125 if (option_full_path
)
126 return full_base_file
;
130 static void set_position(struct position pos
)
133 static int prev_stream
= -1;
138 if (pos
.stream
== 0 && pos
.line
== 0)
141 __smatch_lineno
= pos
.line
;
143 if (pos
.stream
== prev_stream
)
146 filename
= stream_name(pos
.stream
);
149 pathname
= getcwd(NULL
, 0);
151 len
= strlen(pathname
) + 1 + strlen(filename
) + 1;
152 full_filename
= malloc(len
);
153 snprintf(full_filename
, len
, "%s/%s", pathname
, filename
);
155 full_filename
= alloc_string(filename
);
160 int is_assigned_call(struct expression
*expr
)
162 struct expression
*parent
= expr_get_parent_expr(expr
);
165 parent
->type
== EXPR_ASSIGNMENT
&&
167 strip_expr(parent
->right
) == expr
)
173 int is_fake_assigned_call(struct expression
*expr
)
175 struct expression
*parent
= expr_get_fake_parent_expr(expr
);
178 parent
->type
== EXPR_ASSIGNMENT
&&
180 strip_expr(parent
->right
) == expr
)
186 static bool is_inline_func(struct expression
*expr
)
188 if (expr
->type
!= EXPR_SYMBOL
|| !expr
->symbol
)
190 if (!expr
->symbol
->definition
)
192 if (expr
->symbol
->definition
->ctype
.modifiers
& MOD_INLINE
)
198 static int is_noreturn_func(struct expression
*expr
)
200 if (expr
->type
!= EXPR_SYMBOL
|| !expr
->symbol
)
202 if (expr
->symbol
->ctype
.modifiers
& MOD_NORETURN
)
207 static int save_func_time(void *_rl
, int argc
, char **argv
, char **azColName
)
209 unsigned long *rl
= _rl
;
211 *rl
= strtoul(argv
[0], NULL
, 10);
215 static int get_func_time(struct symbol
*sym
)
217 unsigned long time
= 0;
219 run_sql(&save_func_time
, &time
,
220 "select key from return_implies where %s and type = %d;",
221 get_static_filter(sym
), FUNC_TIME
);
226 static int inline_budget
= 20;
228 int inlinable(struct expression
*expr
)
231 struct statement
*last_stmt
= NULL
;
233 if (__inline_fn
) /* don't nest */
236 if (expr
->type
!= EXPR_SYMBOL
|| !expr
->symbol
)
238 if (is_no_inline_function(expr
->symbol
->ident
->name
))
240 sym
= get_base_type(expr
->symbol
);
241 if (sym
->stmt
&& sym
->stmt
->type
== STMT_COMPOUND
) {
242 if (ptr_list_size((struct ptr_list
*)sym
->stmt
->stmts
) > 10)
244 if (sym
->stmt
->type
!= STMT_COMPOUND
)
246 last_stmt
= last_ptr_list((struct ptr_list
*)sym
->stmt
->stmts
);
248 if (sym
->inline_stmt
&& sym
->inline_stmt
->type
== STMT_COMPOUND
) {
249 if (ptr_list_size((struct ptr_list
*)sym
->inline_stmt
->stmts
) > 10)
251 if (sym
->inline_stmt
->type
!= STMT_COMPOUND
)
253 last_stmt
= last_ptr_list((struct ptr_list
*)sym
->inline_stmt
->stmts
);
259 /* the magic numbers in this function are pulled out of my bum. */
260 if (last_stmt
->pos
.line
> sym
->pos
.line
+ inline_budget
)
263 if (get_func_time(expr
->symbol
) >= 2)
269 void __process_post_op_stack(void)
271 struct expression
*expr
;
273 FOR_EACH_PTR(post_op_stack
, expr
) {
274 __pass_to_client(expr
, OP_HOOK
);
275 } END_FOR_EACH_PTR(expr
);
277 __free_ptr_list((struct ptr_list
**)&post_op_stack
);
280 static int handle_comma_assigns(struct expression
*expr
)
282 struct expression
*right
;
283 struct expression
*assign
;
285 right
= strip_expr(expr
->right
);
286 if (right
->type
!= EXPR_COMMA
)
289 __split_expr(right
->left
);
290 __process_post_op_stack();
292 assign
= assign_expression(expr
->left
, '=', right
->right
);
293 __split_expr(assign
);
298 /* This is to handle *p++ = foo; assignments */
299 static int handle_postop_assigns(struct expression
*expr
)
301 struct expression
*left
, *fake_left
;
302 struct expression
*assign
;
304 left
= strip_expr(expr
->left
);
305 if (left
->type
!= EXPR_PREOP
|| left
->op
!= '*')
307 left
= strip_expr(left
->unop
);
308 if (left
->type
!= EXPR_POSTOP
)
311 fake_left
= deref_expression(strip_expr(left
->unop
));
312 assign
= assign_expression(fake_left
, '=', expr
->right
);
314 __split_expr(assign
);
315 __split_expr(expr
->left
);
320 static int prev_expression_is_getting_address(struct expression
*expr
)
322 struct expression
*parent
;
325 parent
= expr_get_parent_expr(expr
);
329 if (parent
->type
== EXPR_PREOP
&& parent
->op
== '&')
331 if (parent
->type
== EXPR_PREOP
&& parent
->op
== '(')
333 if (parent
->type
== EXPR_DEREF
&& parent
->op
== '.')
342 static void handle_builtin_overflow_func(struct expression
*expr
)
344 struct expression
*a
, *b
, *res
, *assign
;
347 if (sym_name_is("__builtin_add_overflow", expr
->fn
))
349 else if (sym_name_is("__builtin_sub_overflow", expr
->fn
))
351 else if (sym_name_is("__builtin_mul_overflow", expr
->fn
))
356 a
= get_argument_from_call_expr(expr
->args
, 0);
357 b
= get_argument_from_call_expr(expr
->args
, 1);
358 res
= get_argument_from_call_expr(expr
->args
, 2);
360 assign
= assign_expression(deref_expression(res
), '=', binop_expression(a
, op
, b
));
361 __split_expr(assign
);
364 static int handle__builtin_choose_expr(struct expression
*expr
)
366 struct expression
*const_expr
, *expr1
, *expr2
;
369 if (!sym_name_is("__builtin_choose_expr", expr
->fn
))
372 const_expr
= get_argument_from_call_expr(expr
->args
, 0);
373 expr1
= get_argument_from_call_expr(expr
->args
, 1);
374 expr2
= get_argument_from_call_expr(expr
->args
, 2);
376 if (!get_value(const_expr
, &sval
) || !expr1
|| !expr2
)
385 static int handle__builtin_choose_expr_assigns(struct expression
*expr
)
387 struct expression
*const_expr
, *right
, *expr1
, *expr2
, *fake
;
390 right
= strip_expr(expr
->right
);
391 if (right
->type
!= EXPR_CALL
)
393 if (!sym_name_is("__builtin_choose_expr", right
->fn
))
396 const_expr
= get_argument_from_call_expr(right
->args
, 0);
397 expr1
= get_argument_from_call_expr(right
->args
, 1);
398 expr2
= get_argument_from_call_expr(right
->args
, 2);
400 if (!get_value(const_expr
, &sval
) || !expr1
|| !expr2
)
403 fake
= assign_expression(expr
->left
, '=', sval
.value
? expr1
: expr2
);
408 void __split_expr(struct expression
*expr
)
413 // sm_msg(" Debug expr_type %d %s", expr->type, show_special(expr->op));
415 if (__in_fake_assign
&& expr
->type
!= EXPR_ASSIGNMENT
)
417 if (__in_fake_assign
>= 4) /* don't allow too much nesting */
420 push_expression(&big_expression_stack
, expr
);
421 set_position(expr
->pos
);
422 __pass_to_client(expr
, EXPR_HOOK
);
424 switch (expr
->type
) {
426 expr_set_parent_expr(expr
->unop
, expr
);
428 if (expr
->op
== '*' &&
429 !prev_expression_is_getting_address(expr
))
430 __pass_to_client(expr
, DEREF_HOOK
);
431 __split_expr(expr
->unop
);
432 __pass_to_client(expr
, OP_HOOK
);
435 expr_set_parent_expr(expr
->unop
, expr
);
437 __split_expr(expr
->unop
);
438 push_expression(&post_op_stack
, expr
);
442 if (expr
->statement
&& !expr
->statement
) {
443 stmt_set_parent_stmt(expr
->statement
,
444 last_ptr_list((struct ptr_list
*)big_statement_stack
));
446 __split_stmt(expr
->statement
);
451 expr_set_parent_expr(expr
->left
, expr
);
452 expr_set_parent_expr(expr
->right
, expr
);
454 __pass_to_client(expr
, LOGIC_HOOK
);
455 __handle_logic(expr
);
458 expr_set_parent_expr(expr
->left
, expr
);
459 expr_set_parent_expr(expr
->right
, expr
);
461 __pass_to_client(expr
, BINOP_HOOK
);
463 expr_set_parent_expr(expr
->left
, expr
);
464 expr_set_parent_expr(expr
->right
, expr
);
466 __split_expr(expr
->left
);
467 __process_post_op_stack();
468 __split_expr(expr
->right
);
470 case EXPR_ASSIGNMENT
: {
471 struct expression
*right
;
473 expr_set_parent_expr(expr
->left
, expr
);
474 expr_set_parent_expr(expr
->right
, expr
);
476 right
= strip_expr(expr
->right
);
480 __pass_to_client(expr
, RAW_ASSIGNMENT_HOOK
);
483 if (__handle_condition_assigns(expr
))
485 /* foo = (x < 5 ? foo : 5); */
486 if (__handle_select_assigns(expr
))
488 /* foo = ({frob(); frob(); frob(); 1;}) */
489 if (__handle_expr_statement_assigns(expr
))
490 break; // FIXME: got after
492 if (handle_comma_assigns(expr
))
494 if (handle__builtin_choose_expr_assigns(expr
))
496 if (handle_postop_assigns(expr
))
497 break; /* no need to goto after_assign */
499 __split_expr(expr
->right
);
500 if (outside_of_function())
501 __pass_to_client(expr
, GLOBAL_ASSIGNMENT_HOOK
);
503 __pass_to_client(expr
, ASSIGNMENT_HOOK
);
505 __fake_struct_member_assignments(expr
);
507 /* Re-examine ->right for inlines. See the commit message */
508 right
= strip_expr(expr
->right
);
509 if (expr
->op
== '=' && right
->type
== EXPR_CALL
)
510 __pass_to_client(expr
, CALL_ASSIGNMENT_HOOK
);
513 if (get_macro_name(right
->pos
) &&
514 get_macro_name(expr
->pos
) != get_macro_name(right
->pos
))
515 __pass_to_client(expr
, MACRO_ASSIGNMENT_HOOK
);
517 __pass_to_client(expr
, ASSIGNMENT_HOOK_AFTER
);
518 __split_expr(expr
->left
);
522 expr_set_parent_expr(expr
->deref
, expr
);
524 __pass_to_client(expr
, DEREF_HOOK
);
525 __split_expr(expr
->deref
);
528 expr_set_parent_expr(expr
->base
, expr
);
530 __split_expr(expr
->base
);
533 case EXPR_FORCE_CAST
:
534 expr_set_parent_expr(expr
->cast_expression
, expr
);
536 __pass_to_client(expr
, CAST_HOOK
);
537 __split_expr(expr
->cast_expression
);
540 if (expr
->cast_expression
)
541 __pass_to_client(strip_parens(expr
->cast_expression
),
547 case EXPR_CONDITIONAL
:
549 expr_set_parent_expr(expr
->conditional
, expr
);
550 expr_set_parent_expr(expr
->cond_true
, expr
);
551 expr_set_parent_expr(expr
->cond_false
, expr
);
553 if (known_condition_true(expr
->conditional
)) {
554 __split_expr(expr
->cond_true
);
557 if (known_condition_false(expr
->conditional
)) {
558 __split_expr(expr
->cond_false
);
561 __pass_to_client(expr
, SELECT_HOOK
);
562 __split_whole_condition(expr
->conditional
);
563 __split_expr(expr
->cond_true
);
564 __push_true_states();
565 __use_false_states();
566 __split_expr(expr
->cond_false
);
567 __merge_true_states();
570 expr_set_parent_expr(expr
->fn
, expr
);
572 if (sym_name_is("__builtin_constant_p", expr
->fn
))
574 if (handle__builtin_choose_expr(expr
))
576 __split_expr(expr
->fn
);
578 if (is_inline_func(expr
->fn
))
579 add_inline_function(expr
->fn
->symbol
->definition
);
580 if (inlinable(expr
->fn
))
582 __process_post_op_stack();
583 __pass_to_client(expr
, FUNCTION_CALL_HOOK_BEFORE
);
584 __pass_to_client(expr
, FUNCTION_CALL_HOOK
);
586 if (inlinable(expr
->fn
))
588 __pass_to_client(expr
, CALL_HOOK_AFTER_INLINE
);
589 if (is_noreturn_func(expr
->fn
))
591 if (!expr_get_parent_expr(expr
))
592 __discard_fake_states(expr
);
593 handle_builtin_overflow_func(expr
);
595 case EXPR_INITIALIZER
:
596 split_expr_list(expr
->expr_list
, expr
);
598 case EXPR_IDENTIFIER
:
599 expr_set_parent_expr(expr
->ident_expression
, expr
);
600 __split_expr(expr
->ident_expression
);
603 expr_set_parent_expr(expr
->idx_expression
, expr
);
604 __split_expr(expr
->idx_expression
);
607 expr_set_parent_expr(expr
->init_expr
, expr
);
608 __split_expr(expr
->init_expr
);
611 __pass_to_client(expr
, SYM_HOOK
);
614 __pass_to_client(expr
, STRING_HOOK
);
619 __pass_to_client(expr
, EXPR_HOOK_AFTER
);
620 pop_expression(&big_expression_stack
);
623 static int is_forever_loop(struct statement
*stmt
)
625 struct expression
*expr
;
628 expr
= strip_expr(stmt
->iterator_pre_condition
);
630 expr
= stmt
->iterator_post_condition
;
632 /* this is a for(;;) loop... */
636 if (get_value(expr
, &sval
) && sval
.value
!= 0)
643 static char *get_loop_name(int num
)
647 snprintf(buf
, 255, "-loop%d", num
);
649 return alloc_sname(buf
);
653 * Pre Loops are while and for loops.
655 static void handle_pre_loop(struct statement
*stmt
)
657 int once_through
; /* we go through the loop at least once */
658 struct sm_state
*extra_sm
= NULL
;
661 struct stree
*stree
= NULL
;
662 struct sm_state
*sm
= NULL
;
664 loop_name
= get_loop_name(loop_num
);
667 __split_stmt(stmt
->iterator_pre_statement
);
668 __prev_stmt
= stmt
->iterator_pre_statement
;
670 once_through
= implied_condition_true(stmt
->iterator_pre_condition
);
676 __merge_gotos(loop_name
, NULL
);
678 extra_sm
= __extra_handle_canonical_loops(stmt
, &stree
);
679 __in_pre_condition
++;
680 __pass_to_client(stmt
, PRELOOP_HOOK
);
681 __split_whole_condition(stmt
->iterator_pre_condition
);
682 __in_pre_condition
--;
683 FOR_EACH_SM(stree
, sm
) {
684 set_state(sm
->owner
, sm
->name
, sm
->sym
, sm
->state
);
685 } END_FOR_EACH_SM(sm
);
688 extra_sm
= get_sm_state(extra_sm
->owner
, extra_sm
->name
, extra_sm
->sym
);
690 if (option_assume_loops
)
693 __split_stmt(stmt
->iterator_statement
);
694 if (is_forever_loop(stmt
)) {
696 __save_gotos(loop_name
, NULL
);
698 __push_fake_cur_stree();
699 __split_stmt(stmt
->iterator_post_statement
);
700 stree
= __pop_fake_cur_stree();
702 __discard_false_states();
705 if (!__path_is_null())
706 __merge_stree_into_cur(stree
);
710 unchanged
= __iterator_unchanged(extra_sm
);
711 __split_stmt(stmt
->iterator_post_statement
);
712 __prev_stmt
= stmt
->iterator_post_statement
;
715 __save_gotos(loop_name
, NULL
);
716 __in_pre_condition
++;
717 __split_whole_condition(stmt
->iterator_pre_condition
);
718 __in_pre_condition
--;
720 __merge_false_states();
722 __discard_false_states();
724 __merge_false_states();
726 if (extra_sm
&& unchanged
)
727 __extra_pre_loop_hook_after(extra_sm
,
728 stmt
->iterator_post_statement
,
729 stmt
->iterator_pre_condition
);
736 * Post loops are do {} while();
738 static void handle_post_loop(struct statement
*stmt
)
742 loop_name
= get_loop_name(loop_num
);
748 __merge_gotos(loop_name
, NULL
);
749 __split_stmt(stmt
->iterator_statement
);
751 if (!expr_is_zero(stmt
->iterator_post_condition
))
752 __save_gotos(loop_name
, NULL
);
754 if (is_forever_loop(stmt
)) {
757 __split_whole_condition(stmt
->iterator_post_condition
);
758 __use_false_states();
764 static int empty_statement(struct statement
*stmt
)
768 if (stmt
->type
== STMT_EXPRESSION
&& !stmt
->expression
)
773 static int last_stmt_on_same_line(void)
775 struct statement
*stmt
;
778 FOR_EACH_PTR_REVERSE(big_statement_stack
, stmt
) {
781 if (stmt
->pos
.line
== get_lineno())
784 } END_FOR_EACH_PTR_REVERSE(stmt
);
788 static void split_asm_ops(struct asm_operand_list
*ops
)
790 struct asm_operand
*op
;
792 FOR_EACH_PTR(ops
, op
) {
793 __split_expr(op
->expr
);
794 } END_FOR_EACH_PTR(op
);
797 static int is_case_val(struct statement
*stmt
, sval_t sval
)
801 if (stmt
->type
!= STMT_CASE
)
803 if (!stmt
->case_expression
) {
807 if (!get_value(stmt
->case_expression
, &case_sval
))
809 if (case_sval
.value
== sval
.value
)
814 static struct range_list
*get_case_rl(struct expression
*switch_expr
,
815 struct expression
*case_expr
,
816 struct expression
*case_to
)
819 struct range_list
*rl
= NULL
;
820 struct symbol
*switch_type
;
822 switch_type
= get_type(switch_expr
);
823 if (get_value(case_to
, &end
) && get_value(case_expr
, &start
)) {
824 start
= sval_cast(switch_type
, start
);
825 end
= sval_cast(switch_type
, end
);
826 add_range(&rl
, start
, end
);
827 } else if (get_value(case_expr
, &start
)) {
828 start
= sval_cast(switch_type
, start
);
829 add_range(&rl
, start
, start
);
835 static void split_known_switch(struct statement
*stmt
, sval_t sval
)
837 struct statement
*tmp
;
838 struct range_list
*rl
;
840 __split_expr(stmt
->switch_expression
);
841 sval
= sval_cast(get_type(stmt
->switch_expression
), sval
);
843 push_expression(&switch_expr_stack
, stmt
->switch_expression
);
844 __save_switch_states(top_expression(switch_expr_stack
));
849 stmt
= stmt
->switch_statement
;
851 __push_scope_hooks();
852 FOR_EACH_PTR(stmt
->stmts
, tmp
) {
853 __smatch_lineno
= tmp
->pos
.line
;
854 if (is_case_val(tmp
, sval
)) {
855 rl
= alloc_rl(sval
, sval
);
856 __merge_switches(top_expression(switch_expr_stack
), rl
);
857 __pass_case_to_client(top_expression(switch_expr_stack
), rl
);
859 if (__path_is_null())
862 if (__path_is_null()) {
866 } END_FOR_EACH_PTR(tmp
);
868 __call_scope_hooks();
869 if (!__pop_default())
870 __merge_switches(top_expression(switch_expr_stack
), NULL
);
871 __discard_switches();
873 pop_expression(&switch_expr_stack
);
876 static void split_case(struct statement
*stmt
)
878 struct range_list
*rl
= NULL
;
880 expr_set_parent_stmt(stmt
->case_expression
, stmt
);
881 expr_set_parent_stmt(stmt
->case_to
, stmt
);
883 rl
= get_case_rl(top_expression(switch_expr_stack
),
884 stmt
->case_expression
, stmt
->case_to
);
885 while (stmt
->case_statement
->type
== STMT_CASE
) {
886 struct range_list
*tmp
;
888 tmp
= get_case_rl(top_expression(switch_expr_stack
),
889 stmt
->case_statement
->case_expression
,
890 stmt
->case_statement
->case_to
);
893 rl
= rl_union(rl
, tmp
);
894 if (!stmt
->case_expression
)
896 stmt
= stmt
->case_statement
;
899 __merge_switches(top_expression(switch_expr_stack
), rl
);
901 if (!stmt
->case_expression
)
904 stmt_set_parent_stmt(stmt
->case_statement
, stmt
);
905 __split_stmt(stmt
->case_statement
);
908 int time_parsing_function(void)
910 return ms_since(&fn_start_time
) / 1000;
913 bool taking_too_long(void)
915 if ((ms_since(&outer_fn_start_time
) / 1000) > 60 * 5) /* five minutes */
920 struct statement
*get_last_stmt(void)
923 struct statement
*stmt
;
925 fn
= get_base_type(cur_func_sym
);
930 stmt
= fn
->inline_stmt
;
931 if (!stmt
|| stmt
->type
!= STMT_COMPOUND
)
933 stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
934 if (stmt
&& stmt
->type
== STMT_LABEL
)
935 stmt
= stmt
->label_statement
;
939 int is_last_stmt(struct statement
*cur_stmt
)
941 struct statement
*last
;
943 last
= get_last_stmt();
944 if (last
&& last
== cur_stmt
)
949 static void handle_backward_goto(struct statement
*goto_stmt
)
951 const char *goto_name
, *label_name
;
952 struct statement
*func_stmt
;
953 struct symbol
*base_type
= get_base_type(cur_func_sym
);
954 struct statement
*tmp
;
959 if (last_goto_statement_handled
)
961 last_goto_statement_handled
= 1;
963 if (!goto_stmt
->goto_label
||
964 goto_stmt
->goto_label
->type
!= SYM_LABEL
||
965 !goto_stmt
->goto_label
->ident
)
967 goto_name
= goto_stmt
->goto_label
->ident
->name
;
969 func_stmt
= base_type
->stmt
;
971 func_stmt
= base_type
->inline_stmt
;
974 if (func_stmt
->type
!= STMT_COMPOUND
)
977 FOR_EACH_PTR(func_stmt
->stmts
, tmp
) {
979 if (tmp
->type
!= STMT_LABEL
)
981 if (!tmp
->label_identifier
||
982 tmp
->label_identifier
->type
!= SYM_LABEL
||
983 !tmp
->label_identifier
->ident
)
985 label_name
= tmp
->label_identifier
->ident
->name
;
986 if (strcmp(goto_name
, label_name
) != 0)
991 } END_FOR_EACH_PTR(tmp
);
994 static void fake_a_return(void)
996 struct expression
*ret
= NULL
;
1001 if (cur_func_return_type() != &void_ctype
)
1002 ret
= unknown_value_expression(NULL
);
1004 __pass_to_client(ret
, RETURN_HOOK
);
1008 static void split_ret_value(struct expression
*expr
)
1010 struct symbol
*type
;
1015 type
= get_real_base_type(cur_func_sym
);
1016 type
= get_real_base_type(type
);
1017 expr
= fake_a_variable_assign(type
, NULL
, expr
, -1);
1019 __in_fake_var_assign
++;
1021 __in_fake_var_assign
--;
1024 static void fake_an_empty_default(struct position pos
)
1026 static struct statement none
= {};
1029 none
.type
= STMT_NONE
;
1030 __merge_switches(top_expression(switch_expr_stack
), NULL
);
1031 __split_stmt(&none
);
1034 static void split_compound(struct statement
*stmt
)
1036 struct statement
*prev
= NULL
;
1037 struct statement
*cur
= NULL
;
1038 struct statement
*next
;
1040 __push_scope_hooks();
1042 FOR_EACH_PTR(stmt
->stmts
, next
) {
1043 /* just set them all ahead of time */
1044 stmt_set_parent_stmt(next
, stmt
);
1054 } END_FOR_EACH_PTR(next
);
1063 * For function scope, then delay calling the scope hooks until the
1064 * end of function hooks can run. I'm not positive this is the right
1067 if (!is_last_stmt(cur
))
1068 __call_scope_hooks();
1072 * This is a hack, work around for detecting empty functions.
1074 static int need_delayed_scope_hooks(void)
1076 struct symbol
*fn
= get_base_type(cur_func_sym
);
1077 struct statement
*stmt
;
1083 stmt
= fn
->inline_stmt
;
1084 if (stmt
&& stmt
->type
== STMT_COMPOUND
)
1089 void __split_label_stmt(struct statement
*stmt
)
1091 if (stmt
->label_identifier
&&
1092 stmt
->label_identifier
->type
== SYM_LABEL
&&
1093 stmt
->label_identifier
->ident
) {
1094 loop_count
|= 0x0800000;
1095 __merge_gotos(stmt
->label_identifier
->ident
->name
, stmt
->label_identifier
);
1099 static void find_asm_gotos(struct statement
*stmt
)
1103 FOR_EACH_PTR(stmt
->asm_labels
, sym
) {
1104 __save_gotos(sym
->ident
->name
, sym
);
1105 } END_FOR_EACH_PTR(sym
);
1108 void __split_stmt(struct statement
*stmt
)
1110 static int indent_cnt
;
1112 struct timeval start
, stop
;
1114 gettimeofday(&start
, NULL
);
1119 if (!__in_fake_assign
)
1120 __silence_warnings_for_stmt
= false;
1122 if (__bail_on_rest_of_function
|| is_skipped_function())
1125 if (out_of_memory() || taking_too_long()) {
1126 gettimeofday(&start
, NULL
);
1128 __bail_on_rest_of_function
= 1;
1130 sm_perror("Function too hairy. Giving up. %lu seconds",
1131 start
.tv_sec
- fn_start_time
.tv_sec
);
1133 final_pass
= 0; /* turn off sm_msg() from here */
1139 add_ptr_list(&big_statement_stack
, stmt
);
1140 free_expression_stack(&big_expression_stack
);
1141 set_position(stmt
->pos
);
1142 __pass_to_client(stmt
, STMT_HOOK
);
1144 switch (stmt
->type
) {
1145 case STMT_DECLARATION
:
1146 split_declaration(stmt
->declaration
);
1149 expr_set_parent_stmt(stmt
->ret_value
, stmt
);
1151 split_ret_value(stmt
->ret_value
);
1152 __pass_to_client(stmt
->ret_value
, RETURN_HOOK
);
1153 __process_post_op_stack();
1156 case STMT_EXPRESSION
:
1157 expr_set_parent_stmt(stmt
->expression
, stmt
);
1158 expr_set_parent_stmt(stmt
->context
, stmt
);
1160 __split_expr(stmt
->expression
);
1163 split_compound(stmt
);
1166 stmt_set_parent_stmt(stmt
->if_true
, stmt
);
1167 stmt_set_parent_stmt(stmt
->if_false
, stmt
);
1168 expr_set_parent_stmt(stmt
->if_conditional
, stmt
);
1170 if (known_condition_true(stmt
->if_conditional
)) {
1171 __split_stmt(stmt
->if_true
);
1174 if (known_condition_false(stmt
->if_conditional
)) {
1175 __split_stmt(stmt
->if_false
);
1178 __split_whole_condition(stmt
->if_conditional
);
1179 __split_stmt(stmt
->if_true
);
1180 if (empty_statement(stmt
->if_true
) &&
1181 last_stmt_on_same_line() &&
1182 !get_macro_name(stmt
->if_true
->pos
))
1183 sm_warning("if();");
1184 __push_true_states();
1185 __use_false_states();
1186 __split_stmt(stmt
->if_false
);
1187 __merge_true_states();
1190 stmt_set_parent_stmt(stmt
->iterator_pre_statement
, stmt
);
1191 stmt_set_parent_stmt(stmt
->iterator_statement
, stmt
);
1192 stmt_set_parent_stmt(stmt
->iterator_post_statement
, stmt
);
1193 expr_set_parent_stmt(stmt
->iterator_pre_condition
, stmt
);
1194 expr_set_parent_stmt(stmt
->iterator_post_condition
, stmt
);
1196 if (stmt
->iterator_pre_condition
)
1197 handle_pre_loop(stmt
);
1198 else if (stmt
->iterator_post_condition
)
1199 handle_post_loop(stmt
);
1201 // these are for(;;) type loops.
1202 handle_pre_loop(stmt
);
1206 stmt_set_parent_stmt(stmt
->switch_statement
, stmt
);
1207 expr_set_parent_stmt(stmt
->switch_expression
, stmt
);
1209 if (get_value(stmt
->switch_expression
, &sval
)) {
1210 split_known_switch(stmt
, sval
);
1213 __split_expr(stmt
->switch_expression
);
1214 push_expression(&switch_expr_stack
, stmt
->switch_expression
);
1215 __save_switch_states(top_expression(switch_expr_stack
));
1219 __split_stmt(stmt
->switch_statement
);
1220 if (!__pop_default() && have_remaining_cases())
1221 fake_an_empty_default(stmt
->pos
);
1222 __discard_switches();
1224 pop_expression(&switch_expr_stack
);
1230 __split_label_stmt(stmt
);
1231 __split_stmt(stmt
->label_statement
);
1234 expr_set_parent_stmt(stmt
->goto_expression
, stmt
);
1236 __split_expr(stmt
->goto_expression
);
1237 if (stmt
->goto_label
&& stmt
->goto_label
->type
== SYM_NODE
) {
1238 if (!strcmp(stmt
->goto_label
->ident
->name
, "break")) {
1240 } else if (!strcmp(stmt
->goto_label
->ident
->name
,
1242 __process_continues();
1244 } else if (stmt
->goto_label
&&
1245 stmt
->goto_label
->type
== SYM_LABEL
&&
1246 stmt
->goto_label
->ident
) {
1247 __save_gotos(stmt
->goto_label
->ident
->name
, stmt
->goto_label
);
1250 if (is_last_stmt(stmt
))
1251 handle_backward_goto(stmt
);
1256 expr_set_parent_stmt(stmt
->asm_string
, stmt
);
1258 find_asm_gotos(stmt
);
1259 __pass_to_client(stmt
, ASM_HOOK
);
1260 __split_expr(stmt
->asm_string
);
1261 split_asm_ops(stmt
->asm_outputs
);
1262 split_asm_ops(stmt
->asm_inputs
);
1263 split_expr_list(stmt
->asm_clobbers
, NULL
);
1268 __split_expr(stmt
->range_expression
);
1269 __split_expr(stmt
->range_low
);
1270 __split_expr(stmt
->range_high
);
1273 __pass_to_client(stmt
, STMT_HOOK_AFTER
);
1274 if (--indent_cnt
== 1)
1275 __discard_fake_states(NULL
);
1278 __process_post_op_stack();
1280 gettimeofday(&stop
, NULL
);
1281 if (option_time_stmt
&& stmt
)
1282 sm_msg("stmt_time%s: %ld",
1283 stmt
->type
== STMT_COMPOUND
? "_block" : "",
1284 stop
.tv_sec
- start
.tv_sec
);
1287 static void split_expr_list(struct expression_list
*expr_list
, struct expression
*parent
)
1289 struct expression
*expr
;
1291 FOR_EACH_PTR(expr_list
, expr
) {
1292 expr_set_parent_expr(expr
, parent
);
1294 __process_post_op_stack();
1295 } END_FOR_EACH_PTR(expr
);
1298 static bool cast_arg(struct symbol
*type
, struct expression
*arg
)
1300 struct symbol
*orig
;
1305 arg
= strip_parens(arg
);
1306 if (arg
!= strip_expr(arg
))
1309 orig
= get_type(arg
);
1315 if (orig
->type
== SYM_ARRAY
&& type
->type
== SYM_PTR
)
1319 * I would have expected that we could just do use (orig == type) but I
1320 * guess for pointers we need to get the basetype to do that comparison.
1324 if (orig
->type
!= SYM_PTR
||
1325 type
->type
!= SYM_PTR
) {
1326 if (type_fits(type
, orig
))
1330 orig
= get_real_base_type(orig
);
1331 type
= get_real_base_type(type
);
1338 static struct expression
*fake_a_variable_assign(struct symbol
*type
, struct expression
*call
, struct expression
*expr
, int nr
)
1340 struct expression
*var
, *assign
, *parent
;
1344 if (!expr
|| !cur_func_sym
)
1347 if (expr
->type
== EXPR_ASSIGNMENT
)
1350 /* for va_args then we don't know the type */
1352 type
= get_type(expr
);
1354 cast
= cast_arg(type
, expr
);
1356 * Using expr_to_sym() here is a hack. We want to say that we don't
1357 * need to assign frob(foo) or frob(foo->bar) if the types are right.
1358 * It turns out faking these assignments is way more expensive than I
1359 * would have imagined. I'm not sure why exactly.
1364 * if the code is "return *p;" where "p" is a user pointer then
1365 * we want to create a fake assignment so that it sets the state
1366 * in check_kernel_user_data.c.
1369 if (expr
->type
!= EXPR_PREOP
&&
1370 expr
->op
!= '*' && expr
->op
!= '&' &&
1376 snprintf(buf
, sizeof(buf
), "__sm_fake_%p", expr
);
1378 snprintf(buf
, sizeof(buf
), "__fake_param_%p_%d", call
, nr
);
1379 var
= fake_variable(type
, buf
);
1380 assign
= assign_expression(var
, '=', expr
);
1381 assign
->smatch_flags
|= Fake
;
1383 parent
= expr_get_parent_expr(expr
);
1384 expr_set_parent_expr(assign
, parent
);
1385 expr_set_parent_expr(expr
, assign
);
1392 static void split_args(struct expression
*expr
)
1394 struct expression
*arg
, *tmp
;
1395 struct symbol
*type
;
1399 FOR_EACH_PTR(expr
->args
, arg
) {
1401 expr_set_parent_expr(arg
, expr
);
1402 type
= get_arg_type(expr
->fn
, i
);
1403 tmp
= fake_a_variable_assign(type
, expr
, arg
, i
);
1405 __in_fake_var_assign
++;
1408 __in_fake_var_assign
--;
1409 __process_post_op_stack();
1410 } END_FOR_EACH_PTR(arg
);
1413 static void split_sym(struct symbol
*sym
)
1417 if (!(sym
->namespace & NS_SYMBOL
))
1420 __split_stmt(sym
->stmt
);
1421 __split_expr(sym
->array_size
);
1422 split_symlist(sym
->arguments
);
1423 split_symlist(sym
->symbol_list
);
1424 __split_stmt(sym
->inline_stmt
);
1425 split_symlist(sym
->inline_symbol_list
);
1428 static void split_symlist(struct symbol_list
*sym_list
)
1432 FOR_EACH_PTR(sym_list
, sym
) {
1434 } END_FOR_EACH_PTR(sym
);
1437 typedef void (fake_cb
)(struct expression
*expr
);
1439 static int member_to_number(struct expression
*expr
, struct ident
*member
)
1441 struct symbol
*type
, *tmp
;
1447 name
= member
->name
;
1449 type
= get_type(expr
);
1450 if (!type
|| type
->type
!= SYM_STRUCT
)
1454 FOR_EACH_PTR(type
->symbol_list
, tmp
) {
1458 if (strcmp(name
, tmp
->ident
->name
) == 0)
1460 } END_FOR_EACH_PTR(tmp
);
1464 static struct ident
*number_to_member(struct expression
*expr
, int num
)
1466 struct symbol
*type
, *member
;
1469 type
= get_type(expr
);
1470 if (!type
|| type
->type
!= SYM_STRUCT
)
1473 FOR_EACH_PTR(type
->symbol_list
, member
) {
1475 return member
->ident
;
1477 } END_FOR_EACH_PTR(member
);
1481 static void fake_element_assigns_helper(struct expression
*array
, struct expression_list
*expr_list
, fake_cb
*fake_cb
);
1483 static void set_inner_struct_members(struct expression
*expr
, struct symbol
*member
)
1485 struct expression
*edge_member
, *assign
;
1486 struct symbol
*base
= get_real_base_type(member
);
1490 expr
= member_expression(expr
, '.', member
->ident
);
1492 FOR_EACH_PTR(base
->symbol_list
, tmp
) {
1493 struct symbol
*type
;
1495 type
= get_real_base_type(tmp
);
1499 edge_member
= member_expression(expr
, '.', tmp
->ident
);
1500 if (get_extra_state(edge_member
))
1503 if (type
->type
== SYM_UNION
|| type
->type
== SYM_STRUCT
) {
1504 set_inner_struct_members(expr
, tmp
);
1511 assign
= assign_expression(edge_member
, '=', zero_expr());
1512 __split_expr(assign
);
1513 } END_FOR_EACH_PTR(tmp
);
1518 static void set_unset_to_zero(struct symbol
*type
, struct expression
*expr
)
1521 struct expression
*member
= NULL
;
1522 struct expression
*assign
;
1524 FOR_EACH_PTR(type
->symbol_list
, tmp
) {
1525 type
= get_real_base_type(tmp
);
1530 member
= member_expression(expr
, '.', tmp
->ident
);
1531 if (get_extra_state(member
))
1535 if (type
->type
== SYM_UNION
|| type
->type
== SYM_STRUCT
) {
1536 set_inner_struct_members(expr
, tmp
);
1539 if (type
->type
== SYM_ARRAY
)
1544 assign
= assign_expression(member
, '=', zero_expr());
1545 __split_expr(assign
);
1546 } END_FOR_EACH_PTR(tmp
);
1549 static void fake_member_assigns_helper(struct expression
*symbol
, struct expression_list
*members
, fake_cb
*fake_cb
)
1551 struct expression
*deref
, *assign
, *tmp
, *right
;
1552 struct symbol
*struct_type
, *type
;
1553 struct ident
*member
;
1556 struct_type
= get_type(symbol
);
1558 (struct_type
->type
!= SYM_STRUCT
&& struct_type
->type
!= SYM_UNION
))
1562 * We're parsing an initializer that could look something like this:
1563 * struct foo foo = {
1565 * .whatever.xxx = 11,
1569 * So what we have here is a list with 42, .whatever, and .zzz. We need
1570 * to break it up into left and right sides of the assignments.
1574 FOR_EACH_PTR(members
, tmp
) {
1576 if (tmp
->type
== EXPR_IDENTIFIER
) {
1577 member_idx
= member_to_number(symbol
, tmp
->expr_ident
);
1578 while (tmp
->type
== EXPR_IDENTIFIER
) {
1579 member
= tmp
->expr_ident
;
1580 tmp
= tmp
->ident_expression
;
1582 deref
= member_expression(deref
, '.', member
);
1584 deref
= member_expression(symbol
, '.', member
);
1587 member
= number_to_member(symbol
, member_idx
);
1588 deref
= member_expression(symbol
, '.', member
);
1592 if (right
->type
== EXPR_INITIALIZER
) {
1593 type
= get_type(deref
);
1594 if (type
&& type
->type
== SYM_ARRAY
)
1595 fake_element_assigns_helper(deref
, right
->expr_list
, fake_cb
);
1597 fake_member_assigns_helper(deref
, right
->expr_list
, fake_cb
);
1599 assign
= assign_expression(deref
, '=', right
);
1602 } END_FOR_EACH_PTR(tmp
);
1604 set_unset_to_zero(struct_type
, symbol
);
1607 static void fake_member_assigns(struct symbol
*sym
, fake_cb
*fake_cb
)
1609 fake_member_assigns_helper(symbol_expression(sym
),
1610 sym
->initializer
->expr_list
, fake_cb
);
1613 static void fake_element_assigns_helper(struct expression
*array
, struct expression_list
*expr_list
, fake_cb
*fake_cb
)
1615 struct expression
*offset
, *binop
, *assign
, *tmp
;
1616 struct symbol
*type
;
1619 if (ptr_list_size((struct ptr_list
*)expr_list
) > 1000)
1624 FOR_EACH_PTR(expr_list
, tmp
) {
1625 if (tmp
->type
== EXPR_INDEX
) {
1626 if (tmp
->idx_from
!= tmp
->idx_to
)
1628 idx
= tmp
->idx_from
;
1631 if (!tmp
->idx_expression
)
1633 tmp
= tmp
->idx_expression
;
1635 offset
= value_expr(idx
);
1636 binop
= array_element_expression(array
, offset
);
1637 if (tmp
->type
== EXPR_INITIALIZER
) {
1638 type
= get_type(binop
);
1639 if (type
&& type
->type
== SYM_ARRAY
)
1640 fake_element_assigns_helper(binop
, tmp
->expr_list
, fake_cb
);
1642 fake_member_assigns_helper(binop
, tmp
->expr_list
, fake_cb
);
1644 assign
= assign_expression(binop
, '=', tmp
);
1651 } END_FOR_EACH_PTR(tmp
);
1653 __call_array_initialized_hooks(array
, max
);
1656 static void fake_element_assigns(struct symbol
*sym
, fake_cb
*fake_cb
)
1658 fake_element_assigns_helper(symbol_expression(sym
), sym
->initializer
->expr_list
, fake_cb
);
1661 static void fake_assign_expr(struct symbol
*sym
)
1663 struct expression
*assign
, *symbol
;
1665 symbol
= symbol_expression(sym
);
1666 assign
= assign_expression(symbol
, '=', sym
->initializer
);
1667 __split_expr(assign
);
1670 static void do_initializer_stuff(struct symbol
*sym
)
1672 if (!sym
->initializer
)
1675 if (sym
->initializer
->type
== EXPR_INITIALIZER
) {
1676 if (get_real_base_type(sym
)->type
== SYM_ARRAY
)
1677 fake_element_assigns(sym
, __split_expr
);
1679 fake_member_assigns(sym
, __split_expr
);
1681 fake_assign_expr(sym
);
1685 static void split_declaration(struct symbol_list
*sym_list
)
1689 FOR_EACH_PTR(sym_list
, sym
) {
1690 __pass_to_client(sym
, DECLARATION_HOOK
);
1691 do_initializer_stuff(sym
);
1693 } END_FOR_EACH_PTR(sym
);
1696 static void call_global_assign_hooks(struct expression
*assign
)
1698 __pass_to_client(assign
, GLOBAL_ASSIGNMENT_HOOK
);
1701 static void fake_global_assign(struct symbol
*sym
)
1703 struct expression
*assign
, *symbol
;
1705 if (get_real_base_type(sym
)->type
== SYM_ARRAY
) {
1706 if (sym
->initializer
&& sym
->initializer
->type
== EXPR_INITIALIZER
) {
1707 fake_element_assigns(sym
, call_global_assign_hooks
);
1708 } else if (sym
->initializer
) {
1709 symbol
= symbol_expression(sym
);
1710 assign
= assign_expression(symbol
, '=', sym
->initializer
);
1711 __pass_to_client(assign
, GLOBAL_ASSIGNMENT_HOOK
);
1713 fake_element_assigns_helper(symbol_expression(sym
), NULL
, call_global_assign_hooks
);
1715 } else if (get_real_base_type(sym
)->type
== SYM_STRUCT
) {
1716 if (sym
->initializer
&& sym
->initializer
->type
== EXPR_INITIALIZER
) {
1717 fake_member_assigns(sym
, call_global_assign_hooks
);
1718 } else if (sym
->initializer
) {
1719 symbol
= symbol_expression(sym
);
1720 assign
= assign_expression(symbol
, '=', sym
->initializer
);
1721 __pass_to_client(assign
, GLOBAL_ASSIGNMENT_HOOK
);
1723 fake_member_assigns_helper(symbol_expression(sym
), NULL
, call_global_assign_hooks
);
1726 symbol
= symbol_expression(sym
);
1727 if (sym
->initializer
) {
1728 assign
= assign_expression(symbol
, '=', sym
->initializer
);
1729 __split_expr(assign
);
1731 assign
= assign_expression(symbol
, '=', zero_expr());
1733 __pass_to_client(assign
, GLOBAL_ASSIGNMENT_HOOK
);
1737 static void start_function_definition(struct symbol
*sym
)
1739 __in_function_def
= 1;
1740 __pass_to_client(sym
, FUNC_DEF_HOOK
);
1741 __in_function_def
= 0;
1742 __pass_to_client(sym
, AFTER_DEF_HOOK
);
1746 void add_function_data(unsigned long *fn_data
)
1748 __add_ptr_list(&fn_data_list
, fn_data
);
1751 static void clear_function_data(void)
1755 FOR_EACH_PTR(fn_data_list
, tmp
) {
1757 } END_FOR_EACH_PTR(tmp
);
1760 static void record_func_time(void)
1762 struct timeval stop
;
1766 gettimeofday(&stop
, NULL
);
1767 func_time
= stop
.tv_sec
- fn_start_time
.tv_sec
;
1768 snprintf(buf
, sizeof(buf
), "%d", func_time
);
1769 sql_insert_return_implies(FUNC_TIME
, 0, "", buf
);
1770 if (option_time
&& func_time
> 2) {
1772 sm_msg("func_time: %d", func_time
);
1777 static void split_function(struct symbol
*sym
)
1779 struct symbol
*base_type
= get_base_type(sym
);
1781 if (!base_type
->stmt
&& !base_type
->inline_stmt
)
1784 gettimeofday(&outer_fn_start_time
, NULL
);
1785 gettimeofday(&fn_start_time
, NULL
);
1788 cur_func
= sym
->ident
->name
;
1789 set_position(sym
->pos
);
1790 clear_function_data();
1792 last_goto_statement_handled
= 0;
1793 sm_debug("new function: %s\n", cur_func
);
1795 if (option_two_passes
) {
1799 start_function_definition(sym
);
1800 __split_stmt(base_type
->stmt
);
1801 __split_stmt(base_type
->inline_stmt
);
1807 start_function_definition(sym
);
1808 __split_stmt(base_type
->stmt
);
1809 __split_stmt(base_type
->inline_stmt
);
1810 if (!__path_is_null() &&
1811 cur_func_return_type() == &void_ctype
&&
1812 !__bail_on_rest_of_function
) {
1813 __pass_to_client(NULL
, RETURN_HOOK
);
1816 __pass_to_client(sym
, END_FUNC_HOOK
);
1817 if (need_delayed_scope_hooks())
1818 __call_scope_hooks();
1819 __pass_to_client(sym
, AFTER_FUNC_HOOK
);
1826 cur_func_sym
= NULL
;
1828 free_data_info_allocs();
1829 free_expression_stack(&switch_expr_stack
);
1830 __free_ptr_list((struct ptr_list
**)&big_statement_stack
);
1831 __bail_on_rest_of_function
= 0;
1834 static void save_flow_state(void)
1838 __add_ptr_list(&backup
, INT_PTR(loop_num
<< 2));
1839 __add_ptr_list(&backup
, INT_PTR(loop_count
<< 2));
1840 __add_ptr_list(&backup
, INT_PTR(final_pass
<< 2));
1842 __add_ptr_list(&backup
, big_statement_stack
);
1843 __add_ptr_list(&backup
, big_expression_stack
);
1844 __add_ptr_list(&backup
, big_condition_stack
);
1845 __add_ptr_list(&backup
, switch_expr_stack
);
1847 __add_ptr_list(&backup
, cur_func_sym
);
1849 __add_ptr_list(&backup
, __prev_stmt
);
1850 __add_ptr_list(&backup
, __cur_stmt
);
1851 __add_ptr_list(&backup
, __next_stmt
);
1853 FOR_EACH_PTR(fn_data_list
, tmp
) {
1854 __add_ptr_list(&backup
, (void *)*tmp
);
1855 } END_FOR_EACH_PTR(tmp
);
1858 static void *pop_backup(void)
1862 ret
= last_ptr_list(backup
);
1863 delete_ptr_list_last(&backup
);
1867 static void restore_flow_state(void)
1871 FOR_EACH_PTR_REVERSE(fn_data_list
, tmp
) {
1872 *tmp
= (unsigned long)pop_backup();
1873 } END_FOR_EACH_PTR_REVERSE(tmp
);
1875 __next_stmt
= pop_backup();
1876 __cur_stmt
= pop_backup();
1877 __prev_stmt
= pop_backup();
1879 cur_func_sym
= pop_backup();
1880 switch_expr_stack
= pop_backup();
1881 big_condition_stack
= pop_backup();
1882 big_expression_stack
= pop_backup();
1883 big_statement_stack
= pop_backup();
1884 final_pass
= PTR_INT(pop_backup()) >> 2;
1885 loop_count
= PTR_INT(pop_backup()) >> 2;
1886 loop_num
= PTR_INT(pop_backup()) >> 2;
1889 static void parse_inline(struct expression
*call
)
1891 struct symbol
*base_type
;
1892 char *cur_func_bak
= cur_func
; /* not aligned correctly for backup */
1893 struct timeval time_backup
= fn_start_time
;
1894 struct expression
*orig_inline
= __inline_fn
;
1897 if (out_of_memory() || taking_too_long())
1902 __pass_to_client(call
, INLINE_FN_START
);
1903 final_pass
= 0; /* don't print anything */
1905 orig_budget
= inline_budget
;
1906 inline_budget
= inline_budget
- 5;
1908 base_type
= get_base_type(call
->fn
->symbol
);
1909 cur_func_sym
= call
->fn
->symbol
;
1910 if (call
->fn
->symbol
->ident
)
1911 cur_func
= call
->fn
->symbol
->ident
->name
;
1914 set_position(call
->fn
->symbol
->pos
);
1917 big_statement_stack
= NULL
;
1918 big_expression_stack
= NULL
;
1919 big_condition_stack
= NULL
;
1920 switch_expr_stack
= NULL
;
1922 sm_debug("inline function: %s\n", cur_func
);
1924 clear_function_data();
1927 start_function_definition(call
->fn
->symbol
);
1928 __split_stmt(base_type
->stmt
);
1929 __split_stmt(base_type
->inline_stmt
);
1930 __pass_to_client(call
->fn
->symbol
, END_FUNC_HOOK
);
1931 __pass_to_client(call
->fn
->symbol
, AFTER_FUNC_HOOK
);
1932 call
->fn
->symbol
->parsed
= true;
1934 free_expression_stack(&switch_expr_stack
);
1935 __free_ptr_list((struct ptr_list
**)&big_statement_stack
);
1939 restore_flow_state();
1940 fn_start_time
= time_backup
;
1941 cur_func
= cur_func_bak
;
1943 restore_all_states();
1944 set_position(call
->pos
);
1945 __inline_fn
= orig_inline
;
1946 inline_budget
= orig_budget
;
1947 __pass_to_client(call
, INLINE_FN_END
);
1950 static struct symbol_list
*inlines_called
;
1951 static void add_inline_function(struct symbol
*sym
)
1953 static struct symbol_list
*already_added
;
1956 FOR_EACH_PTR(already_added
, tmp
) {
1959 } END_FOR_EACH_PTR(tmp
);
1961 add_ptr_list(&already_added
, sym
);
1962 add_ptr_list(&inlines_called
, sym
);
1965 static void process_inlines(void)
1969 FOR_EACH_PTR(inlines_called
, tmp
) {
1970 split_function(tmp
);
1971 } END_FOR_EACH_PTR(tmp
);
1972 free_ptr_list(&inlines_called
);
1975 static struct symbol
*get_last_scoped_symbol(struct symbol_list
*big_list
, int use_static
)
1979 FOR_EACH_PTR_REVERSE(big_list
, sym
) {
1982 if (use_static
&& sym
->ctype
.modifiers
& MOD_STATIC
)
1984 if (!use_static
&& !(sym
->ctype
.modifiers
& MOD_STATIC
))
1986 } END_FOR_EACH_PTR_REVERSE(sym
);
1991 static bool interesting_function(struct symbol
*sym
)
1993 static int prev_stream
= -1;
1994 static bool prev_answer
;
1995 const char *filename
;
1998 if (!(sym
->ctype
.modifiers
& MOD_INLINE
))
2001 if (sym
->pos
.stream
== prev_stream
)
2004 prev_stream
= sym
->pos
.stream
;
2005 prev_answer
= false;
2007 filename
= stream_name(sym
->pos
.stream
);
2008 len
= strlen(filename
);
2009 if (len
> 0 && filename
[len
- 1] == 'c')
2014 static void split_inlines_in_scope(struct symbol
*sym
)
2016 struct symbol
*base
;
2017 struct symbol_list
*scope_list
;
2020 scope_list
= sym
->scope
->symbols
;
2021 stream
= sym
->pos
.stream
;
2023 /* find the last static symbol in the file */
2024 FOR_EACH_PTR_REVERSE(scope_list
, sym
) {
2025 if (sym
->pos
.stream
!= stream
)
2027 if (sym
->type
!= SYM_NODE
)
2029 base
= get_base_type(sym
);
2032 if (base
->type
!= SYM_FN
)
2034 if (!base
->inline_stmt
)
2036 if (!interesting_function(sym
))
2038 add_inline_function(sym
);
2039 } END_FOR_EACH_PTR_REVERSE(sym
);
2044 static void split_inlines(struct symbol_list
*sym_list
)
2048 sym
= get_last_scoped_symbol(sym_list
, 0);
2050 split_inlines_in_scope(sym
);
2051 sym
= get_last_scoped_symbol(sym_list
, 1);
2053 split_inlines_in_scope(sym
);
2056 static struct stree
*clone_estates_perm(struct stree
*orig
)
2058 struct stree
*ret
= NULL
;
2059 struct sm_state
*tmp
;
2061 FOR_EACH_SM(orig
, tmp
) {
2062 set_state_stree_perm(&ret
, tmp
->owner
, tmp
->name
, tmp
->sym
, clone_estate_perm(tmp
->state
));
2063 } END_FOR_EACH_SM(tmp
);
2068 struct position last_pos
;
2069 static void split_c_file_functions(struct symbol_list
*sym_list
)
2074 FOR_EACH_PTR(sym_list
, sym
) {
2075 set_position(sym
->pos
);
2076 if (sym
->type
!= SYM_NODE
|| get_base_type(sym
)->type
!= SYM_FN
) {
2077 __pass_to_client(sym
, BASE_HOOK
);
2078 fake_global_assign(sym
);
2080 } END_FOR_EACH_PTR(sym
);
2081 global_states
= clone_estates_perm(get_all_states_stree(SMATCH_EXTRA
));
2084 FOR_EACH_PTR(sym_list
, sym
) {
2085 set_position(sym
->pos
);
2086 last_pos
= sym
->pos
;
2087 if (!interesting_function(sym
))
2089 if (sym
->type
== SYM_NODE
&& get_base_type(sym
)->type
== SYM_FN
) {
2090 split_function(sym
);
2093 last_pos
= sym
->pos
;
2094 } END_FOR_EACH_PTR(sym
);
2095 split_inlines(sym_list
);
2096 __pass_to_client(sym_list
, END_FILE_HOOK
);
2099 static int final_before_fake
;
2100 void init_fake_env(void)
2103 final_before_fake
= final_pass
;
2105 __push_fake_cur_stree();
2109 void end_fake_env(void)
2111 __pop_fake_cur_stree();
2114 final_pass
= final_before_fake
;
2117 static void open_output_files(char *base_file
)
2121 snprintf(buf
, sizeof(buf
), "%s.smatch", base_file
);
2122 sm_outfd
= fopen(buf
, "w");
2124 sm_fatal("Cannot open %s", buf
);
2129 snprintf(buf
, sizeof(buf
), "%s.smatch.sql", base_file
);
2130 sql_outfd
= fopen(buf
, "w");
2132 sm_fatal("Error: Cannot open %s", buf
);
2134 snprintf(buf
, sizeof(buf
), "%s.smatch.caller_info", base_file
);
2135 caller_info_fd
= fopen(buf
, "w");
2136 if (!caller_info_fd
)
2137 sm_fatal("Error: Cannot open %s", buf
);
2140 void smatch(struct string_list
*filelist
)
2142 struct symbol_list
*sym_list
;
2143 struct timeval stop
, start
;
2147 gettimeofday(&start
, NULL
);
2149 FOR_EACH_PTR_NOTAG(filelist
, base_file
) {
2150 path
= getcwd(NULL
, 0);
2151 free(full_base_file
);
2153 len
= strlen(path
) + 1 + strlen(base_file
) + 1;
2154 full_base_file
= malloc(len
);
2155 snprintf(full_base_file
, len
, "%s/%s", path
, base_file
);
2157 full_base_file
= alloc_string(base_file
);
2159 if (option_file_output
)
2160 open_output_files(base_file
);
2161 sym_list
= sparse_keep_tokens(base_file
);
2162 split_c_file_functions(sym_list
);
2163 } END_FOR_EACH_PTR_NOTAG(base_file
);
2165 gettimeofday(&stop
, NULL
);
2167 set_position(last_pos
);
2170 sm_msg("time: %lu", stop
.tv_sec
- start
.tv_sec
);
2172 sm_msg("mem: %luKb", get_max_memory());