4 * Copyright (C) 2006 Dan Carpenter.
6 * Licensed under the Open Software License version 1.1
19 #include "expression.h"
22 #define MAXSMSTATES 1000000 /* Limits RAM use. Give up on big functions */
27 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
28 extern struct smatch_state undefined
;
29 extern struct smatch_state merged
;
30 extern struct smatch_state true_state
;
31 extern struct smatch_state false_state
;
32 DECLARE_ALLOCATOR(smatch_state
);
34 static inline void *INT_PTR(int i
)
36 return (void *)(long)i
;
39 static inline int PTR_INT(void *p
)
48 struct smatch_state
*state
;
50 struct state_list_stack
*my_pools
;
51 struct state_list_stack
*all_pools
;
52 struct state_list
*possible
;
74 void add_hook(void *func
, enum hook_type type
);
75 typedef struct smatch_state
*(merge_func_t
)(const char *name
,
77 struct smatch_state
*s1
,
78 struct smatch_state
*s2
);
79 typedef struct smatch_state
*(unmatched_func_t
)(struct sm_state
*state
);
80 void add_merge_hook(int client_id
, merge_func_t
*func
);
81 void add_unmatched_state_hook(int client_id
, unmatched_func_t
*func
);
82 typedef void (func_hook
)(const char *fn
, struct expression
*expr
, void *data
);
83 void add_function_hook(const char *lock_for
, func_hook
*call_back
, void *data
);
85 void add_conditional_hook(const char *look_for
, func_hook
*call_back
, void *data
);
86 void add_function_assign_hook(const char *look_for
, func_hook
*call_back
,
88 void return_implies_state(const char *look_for
, long long start
, long long end
,
89 func_hook
*call_back
, void *info
);
91 #define smatch_msg(msg...) \
93 printf("%s +%d %s(%d) ", get_filename(), get_lineno(), \
94 get_function(), get_func_pos()); \
99 #define SM_DEBUG(msg...) do { if (debug_states) printf(msg); } while (0)
100 #define DIMPLIED(msg...) do { if (debug_implied_states) printf(msg); } while (0)
102 #define UNDEFINED INT_MIN
104 struct smatch_state
*get_state(const char *name
, int owner
, struct symbol
*sym
);
105 struct state_list
*get_possible_states(const char *name
, int owner
,
107 void set_state(const char *name
, int owner
, struct symbol
*sym
,
108 struct smatch_state
*state
);
109 void delete_state(const char *name
, int owner
, struct symbol
*sym
);
110 void set_true_false_states(const char *name
, int owner
, struct symbol
*sym
,
111 struct smatch_state
*true_state
,
112 struct smatch_state
*false_state
);
114 struct state_list
*get_all_states(int id
);
116 char *get_filename();
117 char *get_function();
121 /* smatch_helper.c */
122 char *alloc_string(const char *str
);
123 void free_string(char *str
);
124 struct expression
*get_argument_from_call_expr(struct expression_list
*args
,
126 char *get_variable_from_expr_complex(struct expression
*expr
,
127 struct symbol
**sym_ptr
);
128 char *get_variable_from_expr(struct expression
*expr
,
129 struct symbol
**sym_ptr
);
130 struct symbol
*get_ptr_type(struct expression
*expr
);
131 int sym_name_is(const char *name
, struct expression
*expr
);
132 int get_value(struct expression
*expr
);
133 int is_zero(struct expression
*expr
);
134 const char *show_state(struct smatch_state
*state
);
135 struct statement
*get_block_thing(struct expression
*expr
);
136 struct expression
*strip_expr(struct expression
*expr
);
138 /* smatch_ignore.c */
144 DECLARE_PTR_LIST(tracker_list
, struct tracker
);
146 void add_ignore(const char *name
, int owner
, struct symbol
*sym
);
147 int is_ignored(const char *name
, int owner
, struct symbol
*sym
);
150 void add_tracker(struct tracker_list
**list
, const char *name
, int owner
,
152 void del_tracker(struct tracker_list
**list
, const char *name
, int owner
,
154 int in_tracker_list(struct tracker_list
*list
, const char *name
, int owner
,
156 void free_tracker_list(struct tracker_list
**list
);
157 void free_trackers_and_list(struct tracker_list
**list
);
159 /* smatch_conditions */
162 /* ----------------------------------------------------------------
163 The stuff below is all used internally and shouldn't
164 be called from other programs
165 -----------------------------------------------------------------*/
169 void smatch (int argc
, char **argv
);
170 void __split_expr(struct expression
*expr
);
171 void __split_statements(struct statement
*stmt
);
172 extern int option_assume_loops
;
173 extern int option_known_conditions
;
175 /* smatch_conditions */
176 void __split_whole_condition(struct expression
*expr
);
178 /* smatch_implied.c */
179 extern int debug_implied_states
;
180 extern int option_no_implied
;
181 void get_implications(char *name
, struct symbol
*sym
, int comparison
, int num
,
182 struct state_list
**true_states
,
183 struct state_list
**false_states
);
185 /* smatch_extras.c */
186 #define SMATCH_EXTRA 1 /* this is my_id from smatch extra set in smatch.c */
192 extern struct data_range whole_range
;
194 int get_implied_value(struct expression
*expr
);
195 int true_comparison(int left
, int comparison
, int right
);
196 int known_condition_true(struct expression
*expr
);
197 int known_condition_false(struct expression
*expr
);
198 int implied_condition_true(struct expression
*expr
);
199 int implied_condition_false(struct expression
*expr
);
201 /* smatch_states.c */
202 extern int debug_states
;
204 extern int __fake_cur
;
205 extern struct state_list
*__fake_cur_slist
;
206 extern int __fake_conditions
;
207 extern struct state_list
*__fake_cond_true
;
208 extern struct state_list
*__fake_cond_false
;
211 void __set_state(struct sm_state
*sm
);
212 struct state_list
*__get_cur_slist();
213 void __set_true_false_sm(struct sm_state
*true_state
,
214 struct sm_state
*false_state
);
216 void __match_nullify_path_hook(const char *fn
, struct expression
*expr
,
218 void __unnullify_path();
219 int __path_is_null();
220 void clear_all_states();
222 struct sm_state
*get_sm_state(const char *name
, int owner
,
224 void __use_false_only_stack();
225 void __pop_false_only_stack();
226 void __push_true_states();
227 void __use_false_states();
228 void __pop_false_states();
229 void __merge_false_states();
230 void __merge_true_states();
232 void __negate_cond_stacks();
233 void __save_false_states_for_later();
234 void __use_previously_stored_false_states();
235 void __use_cond_true_states();
236 void __use_cond_false_states();
237 void __push_cond_stacks();
238 void __and_cond_states();
239 void __or_cond_states();
240 void __save_pre_cond_states();
241 void __pop_pre_cond_states();
242 void __use_cond_states();
244 void __warn_on_silly_pre_loops();
246 void __push_continues();
247 void __pop_continues();
248 void __process_continues();
249 void __merge_continues();
251 void __push_breaks();
252 void __process_breaks();
253 void __merge_breaks();
256 void __save_switch_states();
257 void __pop_switches();
258 void __merge_switches();
259 void __push_default();
260 void __set_default();
263 void __push_conditions();
264 void __pop_conditions();
266 void __save_gotos(const char *name
);
267 void __merge_gotos(const char *name
);
269 void __print_cur_slist();
272 void __pass_to_client(void *data
, enum hook_type type
);
273 void __pass_to_client_no_data(enum hook_type type
);
274 void __pass_case_to_client(struct expression
*switch_expr
,
275 struct expression
*case_expr
);
276 int __has_merge_function(int client_id
);
277 struct smatch_state
*__client_merge_function(int owner
, const char *name
,
279 struct smatch_state
*s1
,
280 struct smatch_state
*s2
);
281 struct smatch_state
*__client_unmatched_state_function(struct sm_state
*sm
);
283 /* smatch_function_hooks.c */
286 struct data_range
*range
;
287 func_hook
*call_back
;
290 DECLARE_ALLOCATOR(fcall_back
);
291 DECLARE_PTR_LIST(call_back_list
, struct fcall_back
);
292 void create_function_hash(void);
293 void __match_initializer_call(struct symbol
*sym
);
296 struct token
*get_tokens_file(const char *filename
);
299 extern char *data_dir
;
300 extern int option_no_data
;
302 #endif /* !SMATCH_H_ */