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
;
19 static unsigned int path_id
= 0;
20 static unsigned int path_id_next
= 1;
22 char *get_filename() { return filename
; }
23 char *get_function() { return cur_func
; }
24 int get_lineno() { return __smatch_lineno
; }
25 int get_func_pos() { return __smatch_lineno
- line_func_start
; }
27 static void split_statements(struct statement
*stmt
);
28 static void split_symlist(struct symbol_list
*sym_list
);
29 static void split_expr_list(struct expression_list
*expr_list
);
31 unsigned int get_path_id()
36 unsigned int __split_path_id()
40 path_id
= path_id_next
++;
44 void __restore_path_id(int old_id
)
51 void __split_expr(struct expression
*expr
)
56 __smatch_lineno
= expr
->pos
.line
;
57 __pass_to_client(expr
, EXPR_HOOK
);
59 // printf("%d Debug expr_type %d\n", get_lineno(), expr->type);
65 __pass_to_client(expr
, DEREF_HOOK
);
66 __split_expr(expr
->unop
);
69 split_statements(expr
->statement
);
76 if (expr
->type
== EXPR_ASSIGNMENT
)
77 __pass_to_client(expr
, ASSIGNMENT_HOOK
);
78 __split_expr(expr
->left
);
79 __split_expr(expr
->right
);
80 if (expr
->type
== EXPR_ASSIGNMENT
)
81 __pass_to_client(expr
, ASSIGNMENT_AFTER_HOOK
);
84 __pass_to_client(expr
, DEREF_HOOK
);
85 __split_expr(expr
->deref
);
88 __split_expr(expr
->base
);
91 __split_expr(expr
->cast_expression
);
94 /* there isn't anything to pass a client from inside a sizeof() */
96 case EXPR_CONDITIONAL
:
98 __split_true_false_paths();
99 __split_whole_condition(expr
->conditional
);
101 __split_expr(expr
->cond_true
);
102 __use_false_states();
103 __split_expr(expr
->cond_false
);
104 __merge_true_states();
107 __pass_to_client(expr
, FUNCTION_CALL_HOOK
);
108 __split_expr(expr
->fn
);
109 split_expr_list(expr
->args
);
110 __pass_to_client(expr
, FUNCTION_CALL_AFTER_HOOK
);
112 if (expr
->fn
->type
== EXPR_SYMBOL
&&
113 !strcmp(expr
->fn
->symbol_name
->name
, "panic"))
117 case EXPR_INITIALIZER
:
118 split_expr_list(expr
->expr_list
);
120 case EXPR_IDENTIFIER
:
121 __split_expr(expr
->ident_expression
);
124 __split_expr(expr
->idx_expression
);
127 __split_expr(expr
->init_expr
);
134 static int is_forever_loop(struct statement
*stmt
)
137 struct expression
*expr
;
139 expr
= stmt
->iterator_pre_condition
;
141 expr
= stmt
->iterator_post_condition
;
143 // this is a for(;;) loop...
147 if (expr
->type
== EXPR_VALUE
&& expr
->value
== 1) {
155 * Pre Loops are while and for loops.
158 static void handle_pre_loop(struct statement
*stmt
)
160 unsigned int path_orig
;
162 split_statements(stmt
->iterator_pre_statement
);
164 __split_true_false_paths();
167 if (stmt
->iterator_pre_condition
) {
168 __split_whole_condition(stmt
->iterator_pre_condition
);
170 path_orig
= __split_path_id();
173 split_statements(stmt
->iterator_statement
);
174 split_statements(stmt
->iterator_post_statement
);
175 if (is_forever_loop(stmt
)) {
177 __pop_false_states();
180 __merge_false_states();
184 __restore_path_id(path_orig
);
188 * Post loops are do {} while();
190 static void handle_post_loop(struct statement
*stmt
)
194 split_statements(stmt
->iterator_statement
);
196 __split_true_false_paths();
197 __split_whole_condition(stmt
->iterator_post_condition
);
198 /* It would prossibly be cleaner to make this all one function */
200 __use_false_states();
203 if (is_forever_loop(stmt
)) {
212 static void split_statements(struct statement
*stmt
)
214 unsigned int path_orig
;
219 __smatch_lineno
= stmt
->pos
.line
;
220 __pass_to_client(stmt
, STMT_HOOK
);
222 switch (stmt
->type
) {
223 case STMT_DECLARATION
:
224 __pass_declarations_to_client(stmt
->declaration
);
225 split_symlist(stmt
->declaration
);
228 __pass_to_client(stmt
, RETURN_HOOK
);
229 __split_expr(stmt
->ret_value
);
232 case STMT_EXPRESSION
:
233 __split_expr(stmt
->expression
);
235 case STMT_COMPOUND
: {
237 FOR_EACH_PTR(stmt
->stmts
, s
) {
239 } END_FOR_EACH_PTR(s
);
243 __split_true_false_paths();
244 __split_whole_condition(stmt
->if_conditional
);
245 path_orig
= __split_path_id();
247 split_statements(stmt
->if_true
);
249 __use_false_states();
250 split_statements(stmt
->if_false
);
251 __merge_true_states();
252 __restore_path_id(path_orig
);
255 if (stmt
->iterator_pre_condition
)
256 handle_pre_loop(stmt
);
257 else if (stmt
->iterator_post_condition
)
258 handle_post_loop(stmt
);
260 // these are for(;;) type loops.
261 handle_pre_loop(stmt
);
265 __split_expr(stmt
->switch_expression
);
266 __save_switch_states();
270 path_orig
= get_path_id();
271 split_statements(stmt
->switch_statement
);
272 if (!__pop_default())
276 __restore_path_id(path_orig
);
281 if (!stmt
->case_expression
)
283 __split_expr(stmt
->case_expression
);
284 __split_expr(stmt
->case_to
);
285 split_statements(stmt
->case_statement
);
289 stmt
->label
->type
== SYM_LABEL
&&
290 stmt
->label
->ident
) {
291 __merge_gotos(stmt
->label
->ident
->name
);
293 split_statements(stmt
->label_statement
);
296 __split_expr(stmt
->goto_expression
);
297 if (stmt
->goto_label
&& stmt
->goto_label
->type
== SYM_NODE
) {
298 if (!strcmp(stmt
->goto_label
->ident
->name
, "break")) {
300 } else if (!strcmp(stmt
->goto_label
->ident
->name
,
302 __process_continues();
304 } else if (stmt
->goto_label
&&
305 stmt
->goto_label
->type
== SYM_LABEL
&&
306 stmt
->goto_label
->ident
) {
307 __save_gotos(stmt
->goto_label
->ident
->name
);
314 __split_expr(stmt
->asm_string
);
315 //__split_expr(stmt->asm_outputs);
316 //__split_expr(stmt->asm_inputs);
317 //__split_expr(stmt->asm_clobbers);
322 __split_expr(stmt
->range_expression
);
323 __split_expr(stmt
->range_low
);
324 __split_expr(stmt
->range_high
);
329 static void split_expr_list(struct expression_list
*expr_list
)
331 struct expression
*expr
;
332 FOR_EACH_PTR(expr_list
, expr
) {
334 } END_FOR_EACH_PTR(expr
);
338 static void split_sym(struct symbol
*sym
)
342 if (!(sym
->namespace & NS_SYMBOL
))
345 __pass_to_client(sym
, SYM_HOOK
);
346 split_statements(sym
->stmt
);
347 __split_expr(sym
->array_size
);
348 split_symlist(sym
->arguments
);
349 split_symlist(sym
->symbol_list
);
350 split_statements(sym
->inline_stmt
);
351 split_symlist(sym
->inline_symbol_list
);
352 __split_expr(sym
->initializer
);
355 static void split_symlist(struct symbol_list
*sym_list
)
359 FOR_EACH_PTR(sym_list
, sym
) {
361 } END_FOR_EACH_PTR(sym
);
364 static void split_functions(struct symbol_list
*sym_list
)
368 FOR_EACH_PTR(sym_list
, sym
) {
369 struct symbol
*base_type
;
370 base_type
= get_base_type(sym
);
371 if (sym
->type
== SYM_NODE
&& base_type
->type
== SYM_FN
) {
373 line_func_start
= base_type
->stmt
->pos
.line
;
375 cur_func
= sym
->ident
->name
;
376 __smatch_lineno
= sym
->pos
.line
;
377 __pass_to_client(sym
, FUNC_DEF_HOOK
);
378 split_statements(base_type
->stmt
);
379 __pass_to_client(sym
, END_FUNC_HOOK
);
385 __pass_to_client(sym
, BASE_HOOK
);
387 } END_FOR_EACH_PTR(sym
);
390 void smatch (int argc
, char **argv
)
393 struct string_list
*filelist
= NULL
;
394 struct symbol_list
*sym_list
;
397 printf("Usage: smatch <filename.c>\n");
400 sparse_initialize(argc
, argv
, &filelist
);
401 FOR_EACH_PTR_NOTAG(filelist
, filename
) {
402 sym_list
= __sparse(filename
);
403 split_functions(sym_list
);
404 } END_FOR_EACH_PTR_NOTAG(filename
);