4 * Copyright (C) 2006,2008 Dan Carpenter.
6 * Licensed under the Open Software License version 1.1
14 int __smatch_lineno
= 0;
16 static char *filename
;
17 static char *cur_func
;
18 static int line_func_start
;
20 char *get_filename() { return filename
; }
21 char *get_function() { return cur_func
; }
22 int get_lineno() { return __smatch_lineno
; }
23 int get_func_pos() { return __smatch_lineno
- line_func_start
; }
25 static void split_statements(struct statement
*stmt
);
26 static void split_symlist(struct symbol_list
*sym_list
);
27 static void split_expr_list(struct expression_list
*expr_list
);
29 void __split_expr(struct expression
*expr
)
34 // printf("%d Debug expr_type %d\n", get_lineno(), expr->type);
36 __smatch_lineno
= expr
->pos
.line
;
37 __pass_to_client(expr
, EXPR_HOOK
);
42 __pass_to_client(expr
, OP_HOOK
);
44 __pass_to_client(expr
, DEREF_HOOK
);
45 __split_expr(expr
->unop
);
48 split_statements(expr
->statement
);
55 if (expr
->type
== EXPR_ASSIGNMENT
)
56 __pass_to_client(expr
, ASSIGNMENT_HOOK
);
57 __split_expr(expr
->left
);
58 __split_expr(expr
->right
);
59 if (expr
->type
== EXPR_ASSIGNMENT
)
60 __pass_to_client(expr
, ASSIGNMENT_AFTER_HOOK
);
63 __pass_to_client(expr
, DEREF_HOOK
);
64 __split_expr(expr
->deref
);
67 __split_expr(expr
->base
);
70 __split_expr(expr
->cast_expression
);
73 /* there isn't anything to pass a client from inside a sizeof() */
75 case EXPR_CONDITIONAL
:
77 __split_whole_condition(expr
->conditional
);
78 __split_expr(expr
->cond_true
);
81 __split_expr(expr
->cond_false
);
82 __merge_true_states();
83 __pop_false_only_stack();
86 __pass_to_client(expr
, FUNCTION_CALL_HOOK
);
87 __split_expr(expr
->fn
);
88 split_expr_list(expr
->args
);
89 __pass_to_client(expr
, FUNCTION_CALL_AFTER_HOOK
);
91 if (expr
->fn
->type
== EXPR_SYMBOL
&&
92 !strcmp(expr
->fn
->symbol_name
->name
, "panic"))
96 case EXPR_INITIALIZER
:
97 split_expr_list(expr
->expr_list
);
100 __split_expr(expr
->ident_expression
);
103 __split_expr(expr
->idx_expression
);
106 __split_expr(expr
->init_expr
);
113 static int is_forever_loop(struct statement
*stmt
)
116 struct expression
*expr
;
118 expr
= stmt
->iterator_pre_condition
;
120 expr
= stmt
->iterator_post_condition
;
122 /* this is a for(;;) loop... */
126 if (expr
->type
== EXPR_VALUE
&& expr
->value
== 1) {
134 * Pre Loops are while and for loops.
137 static void handle_pre_loop(struct statement
*stmt
)
139 int once_through
; /* we go through the loop at least once */
141 split_statements(stmt
->iterator_pre_statement
);
143 once_through
= known_condition_true(stmt
->iterator_pre_condition
);
148 __split_whole_condition(stmt
->iterator_pre_condition
);
150 split_statements(stmt
->iterator_statement
);
151 split_statements(stmt
->iterator_post_statement
);
152 if (is_forever_loop(stmt
)) {
153 __pop_false_only_stack();
155 __pop_false_states();
157 } else if (once_through
) {
159 __pop_false_states();
160 __use_false_only_stack();
164 __merge_false_states();
165 __use_false_only_stack();
171 * Post loops are do {} while();
173 static void handle_post_loop(struct statement
*stmt
)
177 split_statements(stmt
->iterator_statement
);
179 __split_whole_condition(stmt
->iterator_post_condition
);
180 __use_false_states();
182 if (is_forever_loop(stmt
)) {
190 __pop_false_only_stack();
193 static void split_statements(struct statement
*stmt
)
198 __smatch_lineno
= stmt
->pos
.line
;
199 __pass_to_client(stmt
, STMT_HOOK
);
201 switch (stmt
->type
) {
202 case STMT_DECLARATION
:
203 __pass_declarations_to_client(stmt
->declaration
);
204 split_symlist(stmt
->declaration
);
207 __pass_to_client(stmt
, RETURN_HOOK
);
208 __split_expr(stmt
->ret_value
);
211 case STMT_EXPRESSION
:
212 __split_expr(stmt
->expression
);
214 case STMT_COMPOUND
: {
216 FOR_EACH_PTR(stmt
->stmts
, s
) {
218 } END_FOR_EACH_PTR(s
);
222 __split_whole_condition(stmt
->if_conditional
);
223 split_statements(stmt
->if_true
);
224 __push_true_states();
225 __use_false_states();
226 split_statements(stmt
->if_false
);
227 __merge_true_states();
228 __pop_false_only_stack();
231 if (stmt
->iterator_pre_condition
)
232 handle_pre_loop(stmt
);
233 else if (stmt
->iterator_post_condition
)
234 handle_post_loop(stmt
);
236 // these are for(;;) type loops.
237 handle_pre_loop(stmt
);
241 __split_expr(stmt
->switch_expression
);
242 __save_switch_states();
246 split_statements(stmt
->switch_statement
);
247 if (!__pop_default())
254 if (!stmt
->case_expression
)
256 __split_expr(stmt
->case_expression
);
257 __split_expr(stmt
->case_to
);
258 split_statements(stmt
->case_statement
);
262 stmt
->label
->type
== SYM_LABEL
&&
263 stmt
->label
->ident
) {
264 __merge_gotos(stmt
->label
->ident
->name
);
266 split_statements(stmt
->label_statement
);
269 __split_expr(stmt
->goto_expression
);
270 if (stmt
->goto_label
&& stmt
->goto_label
->type
== SYM_NODE
) {
271 if (!strcmp(stmt
->goto_label
->ident
->name
, "break")) {
273 } else if (!strcmp(stmt
->goto_label
->ident
->name
,
275 __process_continues();
277 } else if (stmt
->goto_label
&&
278 stmt
->goto_label
->type
== SYM_LABEL
&&
279 stmt
->goto_label
->ident
) {
280 __save_gotos(stmt
->goto_label
->ident
->name
);
287 __split_expr(stmt
->asm_string
);
288 //__split_expr(stmt->asm_outputs);
289 //__split_expr(stmt->asm_inputs);
290 //__split_expr(stmt->asm_clobbers);
295 __split_expr(stmt
->range_expression
);
296 __split_expr(stmt
->range_low
);
297 __split_expr(stmt
->range_high
);
302 static void split_expr_list(struct expression_list
*expr_list
)
304 struct expression
*expr
;
305 FOR_EACH_PTR(expr_list
, expr
) {
307 } END_FOR_EACH_PTR(expr
);
311 static void split_sym(struct symbol
*sym
)
315 if (!(sym
->namespace & NS_SYMBOL
))
318 __pass_to_client(sym
, SYM_HOOK
);
319 split_statements(sym
->stmt
);
320 __split_expr(sym
->array_size
);
321 split_symlist(sym
->arguments
);
322 split_symlist(sym
->symbol_list
);
323 split_statements(sym
->inline_stmt
);
324 split_symlist(sym
->inline_symbol_list
);
325 __split_expr(sym
->initializer
);
328 static void split_symlist(struct symbol_list
*sym_list
)
332 FOR_EACH_PTR(sym_list
, sym
) {
334 } END_FOR_EACH_PTR(sym
);
337 static void split_functions(struct symbol_list
*sym_list
)
341 FOR_EACH_PTR(sym_list
, sym
) {
342 struct symbol
*base_type
;
343 base_type
= get_base_type(sym
);
344 if (sym
->type
== SYM_NODE
&& base_type
->type
== SYM_FN
) {
346 line_func_start
= base_type
->stmt
->pos
.line
;
348 cur_func
= sym
->ident
->name
;
349 __smatch_lineno
= sym
->pos
.line
;
350 SM_DEBUG("new function: %s\n", cur_func
);
351 __pass_to_client(sym
, FUNC_DEF_HOOK
);
353 split_statements(base_type
->stmt
);
354 __pass_to_client(sym
, END_FUNC_HOOK
);
360 __pass_to_client(sym
, BASE_HOOK
);
362 } END_FOR_EACH_PTR(sym
);
365 void smatch (int argc
, char **argv
)
368 struct string_list
*filelist
= NULL
;
369 struct symbol_list
*sym_list
;
372 printf("Usage: smatch <filename.c>\n");
375 sparse_initialize(argc
, argv
, &filelist
);
376 FOR_EACH_PTR_NOTAG(filelist
, filename
) {
377 sym_list
= __sparse(filename
);
378 split_functions(sym_list
);
379 } END_FOR_EACH_PTR_NOTAG(filename
);