4 * Copyright (C) 2006,2008 Dan Carpenter.
6 * Licensed under the Open Software License version 1.1
16 #include "smatch_expression_stacks.h"
17 #include "smatch_extra.h"
18 #include "smatch_slist.h"
22 struct expression
*__inline_fn
;
24 static int __smatch_lineno
= 0;
26 static char *base_file
;
27 static const char *filename
;
28 static char *pathname
;
29 static char *full_filename
;
30 static char *cur_func
;
31 static int loop_count
;
32 int __expr_stmt_count
;
33 int __in_function_def
;
34 static struct expression_list
*switch_expr_stack
= NULL
;
35 static struct expression_list
*post_op_stack
= NULL
;
37 struct expression_list
*big_expression_stack
;
38 struct statement_list
*big_statement_stack
;
39 int __in_pre_condition
= 0;
40 int __bail_on_rest_of_function
= 0;
41 char *get_function(void) { return cur_func
; }
42 int get_lineno(void) { return __smatch_lineno
; }
43 int inside_loop(void) { return !!loop_count
; }
44 struct expression
*get_switch_expr(void) { return top_expression(switch_expr_stack
); }
45 int in_expression_statement(void) { return !!__expr_stmt_count
; }
47 static void split_symlist(struct symbol_list
*sym_list
);
48 static void split_declaration(struct symbol_list
*sym_list
);
49 static void split_expr_list(struct expression_list
*expr_list
);
50 static void add_inline_function(struct symbol
*sym
);
51 static void parse_inline(struct expression
*expr
);
53 int option_assume_loops
= 0;
54 int option_known_conditions
= 0;
55 int option_two_passes
= 0;
56 struct symbol
*cur_func_sym
= NULL
;
58 int outside_of_function(void)
60 return cur_func_sym
== NULL
;
63 const char *get_filename(void)
72 const char *get_base_file(void)
77 static void set_position(struct position pos
)
80 static int prev_stream
= -1;
82 if (pos
.stream
== 0 && pos
.line
== 0)
85 __smatch_lineno
= pos
.line
;
87 if (pos
.stream
== prev_stream
)
90 filename
= stream_name(pos
.stream
);
93 pathname
= getcwd(NULL
, 0);
95 len
= strlen(pathname
) + 1 + strlen(filename
) + 1;
96 full_filename
= malloc(len
);
97 snprintf(full_filename
, len
, "%s/%s", pathname
, filename
);
99 full_filename
= alloc_string(filename
);
104 static int is_inline_func(struct expression
*expr
)
106 if (expr
->type
!= EXPR_SYMBOL
|| !expr
->symbol
)
108 if (expr
->symbol
->ctype
.modifiers
& MOD_INLINE
)
113 static int is_noreturn_func(struct expression
*expr
)
115 if (expr
->type
!= EXPR_SYMBOL
|| !expr
->symbol
)
117 if (expr
->symbol
->ctype
.modifiers
& MOD_NORETURN
)
122 int inlinable(struct expression
*expr
)
126 if (__inline_fn
) /* don't nest */
129 if (expr
->type
!= EXPR_SYMBOL
|| !expr
->symbol
)
131 sym
= get_base_type(expr
->symbol
);
132 if (sym
->stmt
&& sym
->stmt
->type
== STMT_COMPOUND
) {
133 if (ptr_list_size((struct ptr_list
*)sym
->stmt
->stmts
) <= 10)
137 if (sym
->inline_stmt
&& sym
->inline_stmt
->type
== STMT_COMPOUND
) {
138 if (ptr_list_size((struct ptr_list
*)sym
->inline_stmt
->stmts
) <= 10)
145 void __process_post_op_stack(void)
147 struct expression
*expr
;
149 FOR_EACH_PTR(post_op_stack
, expr
) {
150 __pass_to_client(expr
, OP_HOOK
);
151 } END_FOR_EACH_PTR(expr
);
153 __free_ptr_list((struct ptr_list
**)&post_op_stack
);
156 void __split_expr(struct expression
*expr
)
161 // sm_msg(" Debug expr_type %d %s", expr->type, show_special(expr->op));
163 push_expression(&big_expression_stack
, expr
);
164 set_position(expr
->pos
);
165 __pass_to_client(expr
, EXPR_HOOK
);
167 switch (expr
->type
) {
170 __pass_to_client(expr
, DEREF_HOOK
);
171 __split_expr(expr
->unop
);
172 __pass_to_client(expr
, OP_HOOK
);
175 __split_expr(expr
->unop
);
176 push_expression(&post_op_stack
, expr
);
180 __split_stmt(expr
->statement
);
185 __pass_to_client(expr
, LOGIC_HOOK
);
186 __handle_logic(expr
);
189 __pass_to_client(expr
, BINOP_HOOK
);
191 __split_expr(expr
->left
);
192 __process_post_op_stack();
193 __split_expr(expr
->right
);
195 case EXPR_ASSIGNMENT
: {
196 struct expression
*tmp
;
201 __pass_to_client(expr
, RAW_ASSIGNMENT_HOOK
);
204 if (__handle_condition_assigns(expr
))
206 /* foo = (x < 5 ? foo : 5); */
207 if (__handle_select_assigns(expr
))
209 /* foo = ({frob(); frob(); frob(); 1;}) */
210 if (__handle_expr_statement_assigns(expr
))
213 __split_expr(expr
->right
);
214 if (outside_of_function())
215 __pass_to_client(expr
, GLOBAL_ASSIGNMENT_HOOK
);
217 __pass_to_client(expr
, ASSIGNMENT_HOOK
);
218 tmp
= strip_expr(expr
->right
);
219 if (tmp
->type
== EXPR_CALL
)
220 __pass_to_client(expr
, CALL_ASSIGNMENT_HOOK
);
221 if (get_macro_name(tmp
->pos
) &&
222 get_macro_name(expr
->pos
) != get_macro_name(tmp
->pos
))
223 __pass_to_client(expr
, MACRO_ASSIGNMENT_HOOK
);
224 __split_expr(expr
->left
);
228 __pass_to_client(expr
, DEREF_HOOK
);
229 __split_expr(expr
->deref
);
232 __split_expr(expr
->base
);
235 case EXPR_FORCE_CAST
:
236 __pass_to_client(expr
, CAST_HOOK
);
237 __split_expr(expr
->cast_expression
);
240 if (expr
->cast_expression
)
241 __pass_to_client(strip_parens(expr
->cast_expression
),
246 evaluate_expression(expr
);
248 case EXPR_CONDITIONAL
:
250 if (known_condition_true(expr
->conditional
)) {
251 __split_expr(expr
->cond_true
);
254 if (known_condition_false(expr
->conditional
)) {
255 __split_expr(expr
->cond_false
);
258 __pass_to_client(expr
, SELECT_HOOK
);
259 __split_whole_condition(expr
->conditional
);
260 __split_expr(expr
->cond_true
);
261 __push_true_states();
262 __use_false_states();
263 __split_expr(expr
->cond_false
);
264 __merge_true_states();
267 if (sym_name_is("__builtin_constant_p", expr
->fn
))
269 split_expr_list(expr
->args
);
270 __split_expr(expr
->fn
);
271 if (is_inline_func(expr
->fn
))
272 add_inline_function(expr
->fn
->symbol
);
273 if (inlinable(expr
->fn
))
275 __process_post_op_stack();
276 __pass_to_client(expr
, FUNCTION_CALL_HOOK
);
278 if (inlinable(expr
->fn
)) {
281 __pass_to_client(expr
, CALL_HOOK_AFTER_INLINE
);
282 if (is_noreturn_func(expr
->fn
))
285 case EXPR_INITIALIZER
:
286 split_expr_list(expr
->expr_list
);
288 case EXPR_IDENTIFIER
:
289 __split_expr(expr
->ident_expression
);
292 __split_expr(expr
->idx_expression
);
295 __split_expr(expr
->init_expr
);
298 __pass_to_client(expr
, SYM_HOOK
);
301 __pass_to_client(expr
, STRING_HOOK
);
306 pop_expression(&big_expression_stack
);
309 static int is_forever_loop(struct statement
*stmt
)
311 struct expression
*expr
;
313 expr
= strip_expr(stmt
->iterator_pre_condition
);
315 expr
= stmt
->iterator_post_condition
;
317 /* this is a for(;;) loop... */
321 if (expr
->type
== EXPR_VALUE
&& expr
->value
== 1)
328 static char *get_loop_name(int num
)
332 snprintf(buf
, 255, "-loop%d", num
);
334 return alloc_sname(buf
);
338 * Pre Loops are while and for loops.
340 static void handle_pre_loop(struct statement
*stmt
)
342 int once_through
; /* we go through the loop at least once */
343 struct sm_state
*extra_sm
= NULL
;
346 struct state_list
*slist
= NULL
;
347 struct sm_state
*sm
= NULL
;
349 loop_name
= get_loop_name(loop_num
);
352 __split_stmt(stmt
->iterator_pre_statement
);
354 once_through
= implied_condition_true(stmt
->iterator_pre_condition
);
360 __merge_gotos(loop_name
);
362 extra_sm
= __extra_handle_canonical_loops(stmt
, &slist
);
363 __in_pre_condition
++;
364 __pass_to_client(stmt
, PRELOOP_HOOK
);
365 __split_whole_condition(stmt
->iterator_pre_condition
);
366 __in_pre_condition
--;
367 FOR_EACH_PTR(slist
, sm
) {
368 set_state(sm
->owner
, sm
->name
, sm
->sym
, sm
->state
);
369 } END_FOR_EACH_PTR(sm
);
372 extra_sm
= get_sm_state(extra_sm
->owner
, extra_sm
->name
, extra_sm
->sym
);
374 if (option_assume_loops
)
377 __split_stmt(stmt
->iterator_statement
);
378 __warn_on_silly_pre_loops();
379 if (is_forever_loop(stmt
)) {
380 struct state_list
*slist
;
382 __save_gotos(loop_name
);
384 __push_fake_cur_slist();
385 __split_stmt(stmt
->iterator_post_statement
);
386 slist
= __pop_fake_cur_slist();
388 __discard_continues();
389 __discard_false_states();
392 if (!__path_is_null())
393 __merge_slist_into_cur(slist
);
397 unchanged
= __iterator_unchanged(extra_sm
);
398 __split_stmt(stmt
->iterator_post_statement
);
399 __save_gotos(loop_name
);
400 __split_whole_condition(stmt
->iterator_pre_condition
);
402 __merge_false_states();
404 __discard_false_states();
406 __merge_false_states();
408 if (extra_sm
&& unchanged
)
409 __extra_pre_loop_hook_after(extra_sm
,
410 stmt
->iterator_post_statement
,
411 stmt
->iterator_pre_condition
);
418 * Post loops are do {} while();
420 static void handle_post_loop(struct statement
*stmt
)
424 loop_name
= get_loop_name(loop_num
);
430 __merge_gotos(loop_name
);
431 __split_stmt(stmt
->iterator_statement
);
433 if (!is_zero(stmt
->iterator_post_condition
))
434 __save_gotos(loop_name
);
436 if (is_forever_loop(stmt
)) {
439 __split_whole_condition(stmt
->iterator_post_condition
);
440 __use_false_states();
446 static int empty_statement(struct statement
*stmt
)
450 if (stmt
->type
== STMT_EXPRESSION
&& !stmt
->expression
)
455 static int last_stmt_on_same_line()
457 struct statement
*stmt
;
460 FOR_EACH_PTR_REVERSE(big_statement_stack
, stmt
) {
463 if (stmt
->pos
.line
== get_lineno())
466 } END_FOR_EACH_PTR_REVERSE(stmt
);
470 static struct statement
*last_stmt
;
471 static int is_last_stmt(struct statement
*stmt
)
473 if (stmt
== last_stmt
)
478 static void print_unreached_initializers(struct symbol_list
*sym_list
)
482 FOR_EACH_PTR(sym_list
, sym
) {
483 if (sym
->initializer
)
484 sm_msg("info: '%s' is not actually initialized (unreached code).",
485 (sym
->ident
? sym
->ident
->name
: "this variable"));
486 } END_FOR_EACH_PTR(sym
);
489 static void print_unreached(struct statement
*stmt
)
491 static int print
= 1;
496 if (!__path_is_null()) {
503 switch (stmt
->type
) {
504 case STMT_COMPOUND
: /* after a switch before a case stmt */
509 case STMT_DECLARATION
: /* switch (x) { int a; case foo: ... */
510 print_unreached_initializers(stmt
->declaration
);
512 case STMT_RETURN
: /* gcc complains if you don't have a return statement */
513 if (is_last_stmt(stmt
))
523 if (!option_spammy
&& empty_statement(stmt
))
525 sm_msg("info: ignoring unreachable code.");
529 static void split_asm_constraints(struct expression_list
*expr_list
)
531 struct expression
*expr
;
534 FOR_EACH_PTR(expr_list
, expr
) {
536 case 0: /* identifier */
537 case 1: /* constraint */
540 case 2: /* expression */
545 } END_FOR_EACH_PTR(expr
);
548 static int is_case_val(struct statement
*stmt
, sval_t sval
)
552 if (stmt
->type
!= STMT_CASE
)
554 if (!stmt
->case_expression
) {
558 if (!get_value(stmt
->case_expression
, &case_sval
))
560 if (case_sval
.value
== sval
.value
)
565 static void split_known_switch(struct statement
*stmt
, sval_t sval
)
567 struct statement
*tmp
;
569 __split_expr(stmt
->switch_expression
);
571 push_expression(&switch_expr_stack
, stmt
->switch_expression
);
572 __save_switch_states(top_expression(switch_expr_stack
));
577 stmt
= stmt
->switch_statement
;
580 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
582 __push_scope_hooks();
583 FOR_EACH_PTR(stmt
->stmts
, tmp
) {
584 __smatch_lineno
= tmp
->pos
.line
;
585 if (is_case_val(tmp
, sval
)) {
586 __merge_switches(top_expression(switch_expr_stack
),
587 stmt
->case_expression
);
588 __pass_case_to_client(top_expression(switch_expr_stack
),
589 stmt
->case_expression
);
591 if (__path_is_null())
594 if (__path_is_null()) {
598 } END_FOR_EACH_PTR(tmp
);
600 __call_scope_hooks();
601 if (!__pop_default())
602 __merge_switches(top_expression(switch_expr_stack
),
604 __discard_switches();
606 pop_expression(&switch_expr_stack
);
609 void __split_stmt(struct statement
*stmt
)
616 if (out_of_memory() || __bail_on_rest_of_function
) {
617 static char *printed
= NULL
;
619 if (printed
!= cur_func
)
620 sm_msg("Function too hairy. Giving up.");
621 final_pass
= 0; /* turn off sm_msg() from here */
626 add_ptr_list(&big_statement_stack
, stmt
);
627 free_expression_stack(&big_expression_stack
);
628 set_position(stmt
->pos
);
629 print_unreached(stmt
);
630 __pass_to_client(stmt
, STMT_HOOK
);
632 switch (stmt
->type
) {
633 case STMT_DECLARATION
:
634 split_declaration(stmt
->declaration
);
637 __split_expr(stmt
->ret_value
);
638 __pass_to_client(stmt
->ret_value
, RETURN_HOOK
);
641 case STMT_EXPRESSION
:
642 __split_expr(stmt
->expression
);
644 case STMT_COMPOUND
: {
645 struct statement
*tmp
;
648 last_stmt
= last_ptr_list((struct ptr_list
*)stmt
->stmts
);
649 __push_scope_hooks();
650 FOR_EACH_PTR(stmt
->stmts
, tmp
) {
652 } END_FOR_EACH_PTR(tmp
);
653 __call_scope_hooks();
657 if (known_condition_true(stmt
->if_conditional
)) {
658 __split_stmt(stmt
->if_true
);
661 if (known_condition_false(stmt
->if_conditional
)) {
662 __split_stmt(stmt
->if_false
);
665 if (option_known_conditions
&&
666 implied_condition_true(stmt
->if_conditional
)) {
667 sm_info("this condition is true.");
668 __split_stmt(stmt
->if_true
);
671 if (option_known_conditions
&&
672 implied_condition_false(stmt
->if_conditional
)) {
673 sm_info("this condition is false.");
674 __split_stmt(stmt
->if_false
);
677 __split_whole_condition(stmt
->if_conditional
);
678 __split_stmt(stmt
->if_true
);
679 if (empty_statement(stmt
->if_true
) &&
680 last_stmt_on_same_line() &&
681 !get_macro_name(stmt
->if_true
->pos
))
682 sm_msg("warn: if();");
683 __push_true_states();
684 __use_false_states();
685 __split_stmt(stmt
->if_false
);
686 __merge_true_states();
689 if (stmt
->iterator_pre_condition
)
690 handle_pre_loop(stmt
);
691 else if (stmt
->iterator_post_condition
)
692 handle_post_loop(stmt
);
694 // these are for(;;) type loops.
695 handle_pre_loop(stmt
);
699 if (get_value(stmt
->switch_expression
, &sval
)) {
700 split_known_switch(stmt
, sval
);
703 __split_expr(stmt
->switch_expression
);
704 push_expression(&switch_expr_stack
, stmt
->switch_expression
);
705 __save_switch_states(top_expression(switch_expr_stack
));
709 __split_stmt(stmt
->switch_statement
);
710 if (!__pop_default())
711 __merge_switches(top_expression(switch_expr_stack
),
713 __discard_switches();
715 pop_expression(&switch_expr_stack
);
718 __merge_switches(top_expression(switch_expr_stack
),
719 stmt
->case_expression
);
720 __pass_case_to_client(top_expression(switch_expr_stack
),
721 stmt
->case_expression
);
722 if (!stmt
->case_expression
)
724 __split_expr(stmt
->case_expression
);
725 __split_expr(stmt
->case_to
);
726 __split_stmt(stmt
->case_statement
);
729 if (stmt
->label_identifier
&&
730 stmt
->label_identifier
->type
== SYM_LABEL
&&
731 stmt
->label_identifier
->ident
) {
732 loop_count
= 1000000;
733 __merge_gotos(stmt
->label_identifier
->ident
->name
);
735 __split_stmt(stmt
->label_statement
);
738 __split_expr(stmt
->goto_expression
);
739 if (stmt
->goto_label
&& stmt
->goto_label
->type
== SYM_NODE
) {
740 if (!strcmp(stmt
->goto_label
->ident
->name
, "break")) {
742 } else if (!strcmp(stmt
->goto_label
->ident
->name
,
744 __process_continues();
746 } else if (stmt
->goto_label
&&
747 stmt
->goto_label
->type
== SYM_LABEL
&&
748 stmt
->goto_label
->ident
) {
749 __save_gotos(stmt
->goto_label
->ident
->name
);
756 __pass_to_client(stmt
, ASM_HOOK
);
757 __split_expr(stmt
->asm_string
);
758 split_asm_constraints(stmt
->asm_outputs
);
759 split_asm_constraints(stmt
->asm_inputs
);
760 split_asm_constraints(stmt
->asm_clobbers
);
765 __split_expr(stmt
->range_expression
);
766 __split_expr(stmt
->range_low
);
767 __split_expr(stmt
->range_high
);
771 __process_post_op_stack();
774 static void split_expr_list(struct expression_list
*expr_list
)
776 struct expression
*expr
;
778 FOR_EACH_PTR(expr_list
, expr
) {
780 __process_post_op_stack();
781 } END_FOR_EACH_PTR(expr
);
784 static void split_sym(struct symbol
*sym
)
788 if (!(sym
->namespace & NS_SYMBOL
))
791 __split_stmt(sym
->stmt
);
792 __split_expr(sym
->array_size
);
793 split_symlist(sym
->arguments
);
794 split_symlist(sym
->symbol_list
);
795 __split_stmt(sym
->inline_stmt
);
796 split_symlist(sym
->inline_symbol_list
);
799 static void split_symlist(struct symbol_list
*sym_list
)
803 FOR_EACH_PTR(sym_list
, sym
) {
805 } END_FOR_EACH_PTR(sym
);
808 typedef void (fake_cb
)(struct expression
*expr
);
810 static int member_to_number(struct expression
*expr
, struct ident
*member
)
812 struct symbol
*type
, *tmp
;
820 type
= get_type(expr
);
821 if (!type
|| type
->type
!= SYM_STRUCT
)
825 FOR_EACH_PTR(type
->symbol_list
, tmp
) {
829 if (strcmp(name
, tmp
->ident
->name
) == 0)
831 } END_FOR_EACH_PTR(tmp
);
835 static struct ident
*number_to_member(struct expression
*expr
, int num
)
837 struct symbol
*type
, *member
;
840 type
= get_type(expr
);
841 if (!type
|| type
->type
!= SYM_STRUCT
)
844 FOR_EACH_PTR(type
->symbol_list
, member
) {
846 return member
->ident
;
848 } END_FOR_EACH_PTR(member
);
852 static void fake_element_assigns_helper(struct expression
*array
, struct expression_list
*expr_list
, fake_cb
*fake_cb
);
859 static struct member_set
*alloc_member_set(struct symbol
*type
)
861 struct member_set
*member_set
;
862 struct symbol
*member
;
866 member_count
= ptr_list_size((struct ptr_list
*)type
->symbol_list
);
867 member_set
= malloc(member_count
* sizeof(*member_set
));
869 FOR_EACH_PTR(type
->symbol_list
, member
) {
870 member_set
[member_idx
].ident
= member
->ident
;
871 member_set
[member_idx
].set
= 0;
873 } END_FOR_EACH_PTR(member
);
878 static void mark_member_as_set(struct symbol
*type
, struct member_set
*member_set
, struct ident
*ident
)
880 int member_count
= ptr_list_size((struct ptr_list
*)type
->symbol_list
);
883 for (i
= 0; i
< member_count
; i
++) {
884 if (member_set
[i
].ident
== ident
) {
885 member_set
[i
].set
= 1;
889 // crap. this is buggy.
890 // sm_msg("internal smatch error in initializer %s.%s", type->ident->name, ident->name);
893 static void set_unset_to_zero(struct expression
*symbol
, struct symbol
*type
, struct member_set
*member_set
)
895 struct expression
*deref
, *assign
;
896 struct symbol
*member
, *member_type
;
900 FOR_EACH_PTR(type
->symbol_list
, member
) {
901 if (!member
->ident
|| member_set
[member_idx
].set
) {
905 member_type
= get_real_base_type(member
);
906 if (!member_type
|| member_type
->type
== SYM_ARRAY
)
908 /* TODO: this should be handled recursively and not ignored */
909 if (member_type
->type
== SYM_STRUCT
|| member_type
->type
== SYM_UNION
)
911 deref
= member_expression(symbol
, '.', member
->ident
);
912 assign
= assign_expression(deref
, zero_expr());
913 __split_expr(assign
);
915 } END_FOR_EACH_PTR(member
);
919 static void fake_member_assigns_helper(struct expression
*symbol
, struct expression_list
*members
, fake_cb
*fake_cb
)
921 struct expression
*deref
, *assign
, *tmp
;
922 struct symbol
*struct_type
, *type
;
923 struct ident
*member
;
925 struct member_set
*member_set
;
927 struct_type
= get_type(symbol
);
929 (struct_type
->type
!= SYM_STRUCT
&& struct_type
->type
!= SYM_UNION
))
932 member_set
= alloc_member_set(struct_type
);
935 FOR_EACH_PTR(members
, tmp
) {
936 member
= number_to_member(symbol
, member_idx
);
937 while (tmp
->type
== EXPR_IDENTIFIER
) {
938 member
= tmp
->expr_ident
;
939 member_idx
= member_to_number(symbol
, member
);
940 tmp
= tmp
->ident_expression
;
942 mark_member_as_set(struct_type
, member_set
, member
);
944 deref
= member_expression(symbol
, '.', member
);
945 if (tmp
->type
== EXPR_INITIALIZER
) {
946 type
= get_type(deref
);
947 if (type
&& type
->type
== SYM_ARRAY
)
948 fake_element_assigns_helper(deref
, tmp
->expr_list
, fake_cb
);
950 fake_member_assigns_helper(deref
, tmp
->expr_list
, fake_cb
);
952 assign
= assign_expression(deref
, tmp
);
955 } END_FOR_EACH_PTR(tmp
);
957 set_unset_to_zero(symbol
, struct_type
, member_set
);
960 static void fake_member_assigns(struct symbol
*sym
, fake_cb
*fake_cb
)
962 fake_member_assigns_helper(symbol_expression(sym
),
963 sym
->initializer
->expr_list
, fake_cb
);
966 static void fake_element_assigns_helper(struct expression
*array
, struct expression_list
*expr_list
, fake_cb
*fake_cb
)
968 struct expression
*offset
, *binop
, *assign
, *tmp
;
973 FOR_EACH_PTR(expr_list
, tmp
) {
974 if (tmp
->type
== EXPR_INDEX
) {
975 if (tmp
->idx_from
!= tmp
->idx_to
)
978 if (!tmp
->idx_expression
)
980 tmp
= tmp
->idx_expression
;
982 offset
= value_expr(idx
);
983 binop
= array_element_expression(array
, offset
);
984 if (tmp
->type
== EXPR_INITIALIZER
) {
985 type
= get_type(binop
);
986 if (type
&& type
->type
== SYM_ARRAY
)
987 fake_element_assigns_helper(binop
, tmp
->expr_list
, fake_cb
);
989 fake_member_assigns_helper(binop
, tmp
->expr_list
, fake_cb
);
991 assign
= assign_expression(binop
, tmp
);
996 } END_FOR_EACH_PTR(tmp
);
999 static void fake_element_assigns(struct symbol
*sym
, fake_cb
*fake_cb
)
1001 fake_element_assigns_helper(symbol_expression(sym
), sym
->initializer
->expr_list
, fake_cb
);
1004 static void fake_assign_expr(struct symbol
*sym
)
1006 struct expression
*assign
, *symbol
;
1008 symbol
= symbol_expression(sym
);
1009 assign
= assign_expression(symbol
, sym
->initializer
);
1010 __split_expr(assign
);
1013 static void call_split_expr(struct expression
*expr
)
1018 static void do_initializer_stuff(struct symbol
*sym
)
1020 if (!sym
->initializer
)
1023 if (sym
->initializer
->type
== EXPR_INITIALIZER
) {
1024 if (get_real_base_type(sym
)->type
== SYM_ARRAY
)
1025 fake_element_assigns(sym
, call_split_expr
);
1027 fake_member_assigns(sym
, call_split_expr
);
1029 fake_assign_expr(sym
);
1033 static void split_declaration(struct symbol_list
*sym_list
)
1037 FOR_EACH_PTR(sym_list
, sym
) {
1038 __pass_to_client(sym
, DECLARATION_HOOK
);
1039 do_initializer_stuff(sym
);
1041 } END_FOR_EACH_PTR(sym
);
1044 static void call_global_assign_hooks(struct expression
*assign
)
1046 __pass_to_client(assign
, GLOBAL_ASSIGNMENT_HOOK
);
1049 static void fake_global_assign(struct symbol
*sym
)
1051 struct expression
*assign
, *symbol
;
1053 if (!sym
->initializer
)
1055 if (sym
->initializer
->type
== EXPR_INITIALIZER
) {
1056 if (get_real_base_type(sym
)->type
== SYM_ARRAY
)
1057 fake_element_assigns(sym
, call_global_assign_hooks
);
1059 fake_member_assigns(sym
, call_global_assign_hooks
);
1061 symbol
= symbol_expression(sym
);
1062 assign
= assign_expression(symbol
, sym
->initializer
);
1063 __pass_to_client(assign
, GLOBAL_ASSIGNMENT_HOOK
);
1067 static void start_function_definition(struct symbol
*sym
)
1069 __in_function_def
= 1;
1070 __pass_to_client(sym
, FUNC_DEF_HOOK
);
1071 __in_function_def
= 0;
1072 __pass_to_client(sym
, AFTER_DEF_HOOK
);
1076 static void split_function(struct symbol
*sym
)
1078 struct symbol
*base_type
= get_base_type(sym
);
1082 cur_func
= sym
->ident
->name
;
1083 __smatch_lineno
= sym
->pos
.line
;
1086 sm_debug("new function: %s\n", cur_func
);
1088 if (option_two_passes
) {
1092 start_function_definition(sym
);
1093 __split_stmt(base_type
->stmt
);
1094 __split_stmt(base_type
->inline_stmt
);
1099 start_function_definition(sym
);
1100 __split_stmt(base_type
->stmt
);
1101 __split_stmt(base_type
->inline_stmt
);
1102 __pass_to_client(sym
, END_FUNC_HOOK
);
1103 __pass_to_client(sym
, AFTER_FUNC_HOOK
);
1104 cur_func_sym
= NULL
;
1107 free_data_info_allocs();
1108 free_expression_stack(&switch_expr_stack
);
1109 __free_ptr_list((struct ptr_list
**)&big_statement_stack
);
1110 __bail_on_rest_of_function
= 0;
1113 static void parse_inline(struct expression
*call
)
1115 struct symbol
*base_type
;
1116 int loop_num_bak
= loop_num
;
1117 int final_pass_bak
= final_pass
;
1118 char *cur_func_bak
= cur_func
;
1119 struct statement_list
*big_statement_stack_bak
= big_statement_stack
;
1120 struct expression_list
*big_expression_stack_bak
= big_expression_stack
;
1121 struct expression_list
*switch_expr_stack_bak
= switch_expr_stack
;
1122 struct symbol
*cur_func_sym_bak
= cur_func_sym
;
1124 __pass_to_client(call
, INLINE_FN_START
);
1125 final_pass
= 0; /* don't print anything */
1128 base_type
= get_base_type(call
->fn
->symbol
);
1129 cur_func_sym
= call
->fn
->symbol
;
1130 if (call
->fn
->symbol
->ident
)
1131 cur_func
= call
->fn
->symbol
->ident
->name
;
1134 set_position(call
->fn
->symbol
->pos
);
1137 nullify_all_states();
1138 big_statement_stack
= NULL
;
1139 big_expression_stack
= NULL
;
1140 switch_expr_stack
= NULL
;
1142 sm_debug("inline function: %s\n", cur_func
);
1145 start_function_definition(call
->fn
->symbol
);
1146 __split_stmt(base_type
->stmt
);
1147 __split_stmt(base_type
->inline_stmt
);
1148 __pass_to_client(call
->fn
->symbol
, END_FUNC_HOOK
);
1149 __pass_to_client(call
->fn
->symbol
, AFTER_FUNC_HOOK
);
1151 free_expression_stack(&switch_expr_stack
);
1152 __free_ptr_list((struct ptr_list
**)&big_statement_stack
);
1155 loop_num
= loop_num_bak
;
1156 final_pass
= final_pass_bak
;
1157 cur_func_sym
= cur_func_sym_bak
;
1158 cur_func
= cur_func_bak
;
1159 big_statement_stack
= big_statement_stack_bak
;
1160 big_expression_stack
= big_expression_stack_bak
;
1161 switch_expr_stack
= switch_expr_stack_bak
;
1163 restore_all_states();
1164 set_position(call
->pos
);
1166 __pass_to_client(call
, INLINE_FN_END
);
1169 static struct symbol_list
*inlines_called
;
1170 static void add_inline_function(struct symbol
*sym
)
1172 static struct symbol_list
*already_added
;
1175 FOR_EACH_PTR(already_added
, tmp
) {
1178 } END_FOR_EACH_PTR(tmp
);
1180 add_ptr_list(&already_added
, sym
);
1181 add_ptr_list(&inlines_called
, sym
);
1184 static void process_inlines()
1188 FOR_EACH_PTR(inlines_called
, tmp
) {
1189 split_function(tmp
);
1190 } END_FOR_EACH_PTR(tmp
);
1191 free_ptr_list(&inlines_called
);
1194 static struct symbol
*get_last_scoped_symbol(struct symbol_list
*big_list
, int use_static
)
1198 FOR_EACH_PTR_REVERSE(big_list
, sym
) {
1201 if (use_static
&& sym
->ctype
.modifiers
& MOD_STATIC
)
1203 if (!use_static
&& !(sym
->ctype
.modifiers
& MOD_STATIC
))
1205 } END_FOR_EACH_PTR_REVERSE(sym
);
1210 static void split_inlines_in_scope(struct symbol
*sym
)
1212 struct symbol
*base
;
1213 struct symbol_list
*scope_list
;
1216 scope_list
= sym
->scope
->symbols
;
1217 stream
= sym
->pos
.stream
;
1219 /* find the last static symbol in the file */
1220 FOR_EACH_PTR_REVERSE(scope_list
, sym
) {
1221 if (sym
->pos
.stream
!= stream
)
1223 if (sym
->type
!= SYM_NODE
)
1225 base
= get_base_type(sym
);
1228 if (base
->type
!= SYM_FN
)
1230 if (!base
->inline_stmt
)
1232 add_inline_function(sym
);
1233 } END_FOR_EACH_PTR_REVERSE(sym
);
1238 static void split_inlines(struct symbol_list
*sym_list
)
1242 sym
= get_last_scoped_symbol(sym_list
, 0);
1244 split_inlines_in_scope(sym
);
1245 sym
= get_last_scoped_symbol(sym_list
, 1);
1247 split_inlines_in_scope(sym
);
1250 static void split_functions(struct symbol_list
*sym_list
)
1254 FOR_EACH_PTR(sym_list
, sym
) {
1255 set_position(sym
->pos
);
1256 if (sym
->type
== SYM_NODE
&& get_base_type(sym
)->type
== SYM_FN
) {
1257 split_function(sym
);
1260 __pass_to_client(sym
, BASE_HOOK
);
1261 fake_global_assign(sym
);
1263 } END_FOR_EACH_PTR(sym
);
1264 split_inlines(sym_list
);
1265 __pass_to_client(sym_list
, END_FILE_HOOK
);
1268 void smatch(int argc
, char **argv
)
1271 struct string_list
*filelist
= NULL
;
1272 struct symbol_list
*sym_list
;
1275 printf("Usage: smatch [--debug] <filename.c>\n");
1278 sparse_initialize(argc
, argv
, &filelist
);
1279 FOR_EACH_PTR_NOTAG(filelist
, base_file
) {
1280 if (option_file_output
) {
1283 snprintf(buf
, sizeof(buf
), "%s.smatch", base_file
);
1284 sm_outfd
= fopen(buf
, "w");
1286 printf("Error: Cannot open %s\n", base_file
);
1290 sym_list
= sparse_keep_tokens(base_file
);
1291 split_functions(sym_list
);
1292 } END_FOR_EACH_PTR_NOTAG(base_file
);