1 /*
2 * Copyright (C) 2009 Dan Carpenter.
3 *
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.
8 *
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.
13 *
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
16 */
17
18 DECLARE_PTR_LIST(range_list, struct data_range);
19 DECLARE_PTR_LIST(range_list_stack, struct range_list);
20
21 struct relation {
22 char *name;
23 struct symbol *sym;
24 };
25
26 DECLARE_PTR_LIST(related_list, struct relation);
27
28 struct data_info {
29 struct related_list *related;
30 struct range_list *value_ranges;
31 sval_t fuzzy_max;
32 unsigned int hard_max:1;
33 };
34 DECLARE_ALLOCATOR(data_info);
35
36 extern struct string_list *__ignored_macros;
37
38 /* these are implemented in smatch_ranges.c */
39 struct range_list *rl_zero(void);
40 struct range_list *rl_one(void);
41 char *show_rl(struct range_list *list);
42 int str_to_comparison_arg(const char *c, struct expression *call, int *comparison, struct expression **arg);
43 void str_to_rl(struct symbol *type, char *value, struct range_list **rl);
44 void call_results_to_rl(struct expression *call, struct symbol *type, char *value, struct range_list **rl);
45
46 struct data_range *alloc_range(sval_t min, sval_t max);
47 struct data_range *alloc_range_perm(sval_t min, sval_t max);
48
49 struct range_list *alloc_rl(sval_t min, sval_t max);
50 struct range_list *clone_rl(struct range_list *list);
51 struct range_list *clone_rl_permanent(struct range_list *list);
52 struct range_list *alloc_whole_rl(struct symbol *type);
53
54 void add_range(struct range_list **list, sval_t min, sval_t max);
55 struct range_list *remove_range(struct range_list *list, sval_t min, sval_t max);
56 void tack_on(struct range_list **list, struct data_range *drange);
57
58 int true_comparison_range(struct data_range *left, int comparison, struct data_range *right);
59 int true_comparison_range_LR(int comparison, struct data_range *var, struct data_range *val, int left);
60 int false_comparison_range_LR(int comparison, struct data_range *var, struct data_range *val, int left);
61
62 int possibly_true(struct expression *left, int comparison, struct expression *right);
63 int possibly_true_rl(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
64 int possibly_true_rl_LR(int comparison, struct range_list *a, struct range_list *b, int left);
65
66 int possibly_false(struct expression *left, int comparison, struct expression *right);
67 int possibly_false_rl(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
68 int possibly_false_rl_LR(int comparison, struct range_list *a, struct range_list *b, int left);
69
70 int rl_has_sval(struct range_list *rl, sval_t sval);
71 int ranges_equiv(struct data_range *one, struct data_range *two);
72
73 int rl_equiv(struct range_list *one, struct range_list *two);
74 int is_whole_rl(struct range_list *rl);
75 int is_whole_rl_non_zero(struct range_list *rl);
76 int estate_is_unknown(struct smatch_state *state);
77
78 sval_t rl_min(struct range_list *rl);
79 sval_t rl_max(struct range_list *rl);
80 int rl_to_sval(struct range_list *rl, sval_t *sval);
81 struct symbol *rl_type(struct range_list *rl);
82
83 struct range_list *rl_invert(struct range_list *orig);
84 struct range_list *rl_filter(struct range_list *rl, struct range_list *filter);
85 struct range_list *rl_intersection(struct range_list *one, struct range_list *two);
86 struct range_list *rl_union(struct range_list *one, struct range_list *two);
87 struct range_list *rl_binop(struct range_list *left, int op, struct range_list *right);
88
89 void push_rl(struct range_list_stack **rl_stack, struct range_list *rl);
90 struct range_list *pop_rl(struct range_list_stack **rl_stack);
91 struct range_list *top_rl(struct range_list_stack *rl_stack);
92 void filter_top_rl(struct range_list_stack **rl_stack, struct range_list *filter);
93
94 struct range_list *rl_truncate_cast(struct symbol *type, struct range_list *rl);
95 struct range_list *cast_rl(struct symbol *type, struct range_list *rl);
96 int get_implied_rl(struct expression *expr, struct range_list **rl);
97 int get_absolute_rl(struct expression *expr, struct range_list **rl);
98 int get_real_absolute_rl(struct expression *expr, struct range_list **rl);
99 struct range_list *var_to_absolute_rl(struct expression *expr);
100 int custom_get_absolute_rl(struct expression *expr,
101 struct range_list *(*fn)(struct expression *expr),
102 struct range_list **rl);
103 int get_implied_rl_var_sym(const char *var, struct symbol *sym, struct range_list **rl);
104 void split_comparison_rl(struct range_list *left_orig, int op, struct range_list *right_orig,
105 struct range_list **left_true_rl, struct range_list **left_false_rl,
106 struct range_list **right_true_rl, struct range_list **right_false_rl);
107
108 void free_data_info_allocs(void);
109 void free_all_rl(void);
110
111 /* smatch_estate.c */
112
113 struct smatch_state *alloc_estate_empty(void);
114 struct smatch_state *alloc_estate_sval(sval_t sval);
115 struct smatch_state *alloc_estate_range(sval_t min, sval_t max);
116 struct smatch_state *alloc_estate_rl(struct range_list *rl);
117 struct smatch_state *alloc_estate_whole(struct symbol *type);
118 struct smatch_state *clone_estate(struct smatch_state *state);
119 struct smatch_state *clone_estate_cast(struct symbol *type, struct smatch_state *state);
120
121 struct smatch_state *merge_estates(struct smatch_state *s1, struct smatch_state *s2);
122
123 int estates_equiv(struct smatch_state *one, struct smatch_state *two);
124 int estate_is_whole(struct smatch_state *state);
125 int estate_is_empty(struct smatch_state *state);
126
127 struct range_list *estate_rl(struct smatch_state *state);
128 struct related_list *estate_related(struct smatch_state *state);
129
130 sval_t estate_min(struct smatch_state *state);
131 sval_t estate_max(struct smatch_state *state);
132 struct symbol *estate_type(struct smatch_state *state);
133
134 int estate_has_fuzzy_max(struct smatch_state *state);
135 sval_t estate_get_fuzzy_max(struct smatch_state *state);
136 void estate_set_fuzzy_max(struct smatch_state *state, sval_t max);
137 void estate_copy_fuzzy_max(struct smatch_state *new, struct smatch_state *old);
138 void estate_clear_fuzzy_max(struct smatch_state *state);
139 int estate_has_hard_max(struct smatch_state *state);
140 void estate_set_hard_max(struct smatch_state *state);
141 void estate_clear_hard_max(struct smatch_state *state);
142 int estate_get_hard_max(struct smatch_state *state, sval_t *sval);
143
144 int estate_get_single_value(struct smatch_state *state, sval_t *sval);
145 struct smatch_state *get_implied_estate(struct expression *expr);
146
147 struct smatch_state *estate_filter_sval(struct smatch_state *orig, sval_t filter);
148 struct smatch_state *estate_filter_range(struct smatch_state *orig, sval_t filter_min, sval_t filter_max);
149 struct data_info *clone_dinfo_perm(struct data_info *dinfo);
150 struct smatch_state *clone_estate_perm(struct smatch_state *state);
151
152 /* smatch_extra.c */
153 bool is_impossible_variable(struct expression *expr);
154 struct sm_state *get_extra_sm_state(struct expression *expr);
155 struct smatch_state *get_extra_state(struct expression *expr);
156 void call_extra_mod_hooks(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state);
157 void set_extra_mod(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state);
158 void set_extra_expr_mod(struct expression *expr, struct smatch_state *state);
159 void set_extra_nomod(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state);
160 void set_extra_nomod_vsl(const char *name, struct symbol *sym, struct var_sym_list *vsl, struct expression *expr, struct smatch_state *state);
161 void set_extra_expr_nomod(struct expression *expr, struct smatch_state *state);
162 void set_extra_mod_helper(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state);
163
164 struct data_info *get_dinfo(struct smatch_state *state);
165
166 void add_extra_mod_hook(void (*fn)(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state));
167 void add_extra_nomod_hook(void (*fn)(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state));
168 int implied_not_equal(struct expression *expr, long long val);
169 int implied_not_equal_name_sym(char *name, struct symbol *sym, long long val);
170 int parent_is_null_var_sym(const char *name, struct symbol *sym);
171 int parent_is_null(struct expression *expr);
172 int parent_is_free_var_sym_strict(const char *name, struct symbol *sym);
173 int parent_is_free_var_sym(const char *name, struct symbol *sym);
174 int parent_is_free(struct expression *expr);
175
176 struct sm_state *__extra_handle_canonical_loops(struct statement *loop, struct stree **stree);
177 int __iterator_unchanged(struct sm_state *sm);
178 void __extra_pre_loop_hook_after(struct sm_state *sm,
179 struct statement *iterator,
180 struct expression *condition);
181
182 /* smatch_equiv.c */
183 void set_equiv(struct expression *left, struct expression *right);
184 void set_related(struct smatch_state *estate, struct related_list *rlist);
185 struct related_list *get_shared_relations(struct related_list *one,
186 struct related_list *two);
187 struct related_list *clone_related_list(struct related_list *related);
188 void remove_from_equiv(const char *name, struct symbol *sym);
189 void remove_from_equiv_expr(struct expression *expr);
190 void set_equiv_state_expr(int id, struct expression *expr, struct smatch_state *state);
191
192 /* smatch_function_hooks.c */
193 void function_comparison(struct expression *left, int comparison, struct expression *right);
194
195 /* smatch_expressions.c */
196 struct expression *zero_expr();
197 struct expression *value_expr(long long val);
198 struct expression *member_expression(struct expression *deref, int op, struct ident *member);
199 struct expression *preop_expression(struct expression *expr, int op);
200 struct expression *deref_expression(struct expression *expr);
201 struct expression *assign_expression(struct expression *left, int op, struct expression *right);
202 struct expression *binop_expression(struct expression *left, int op, struct expression *right);
203 struct expression *array_element_expression(struct expression *array, struct expression *offset);
204 struct expression *symbol_expression(struct symbol *sym);
205 struct expression *string_expression(char *str);
206 struct expression *compare_expression(struct expression *left, int op, struct expression *right);
207 struct expression *unknown_value_expression(struct expression *expr);
208 int is_fake_call(struct expression *expr);
209 struct expression *gen_expression_from_key(struct expression *arg, const char *key);
210 void free_tmp_expressions(void);
211 void expr_set_parent_expr(struct expression *expr, struct expression *parent);
212 void expr_set_parent_stmt(struct expression *expr, struct statement *parent);
213 struct expression *expr_get_parent_expr(struct expression *expr);
214 struct statement *expr_get_parent_stmt(struct expression *expr);
215
216 /* smatch_param_limit.c */
217 struct smatch_state *get_orig_estate(const char *name, struct symbol *sym);
218
219 /* smatch_real_absolute.c */
220 struct smatch_state *get_real_absolute_state(struct expression *expr);
221 struct smatch_state *get_real_absolute_state_var_sym(const char *name, struct symbol *sym);
222
223 /* smatch_imaginary_absolute.c */
224 void __save_imaginary_state(struct expression *expr, struct range_list *true_rl, struct range_list *false_rl);
225 int get_imaginary_absolute(struct expression *expr, struct range_list **rl);
226