smatch_extra.h

   1 /*
   2  * sparse/smatch_extra.h
   3  *
   4  * Copyright (C) 2009 Dan Carpenter.
   5  *
   6  * Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 enum data_type {
  11         DATA_RANGE,
  12 };
  13
  14 DECLARE_PTR_LIST(range_list, struct data_range);
  15 DECLARE_PTR_LIST(range_list_stack, struct range_list);
  16
  17 struct relation {
  18         int op;
  19         char *name;
  20         struct symbol *sym;
  21 };
  22
  23 DECLARE_PTR_LIST(related_list, struct relation);
  24
  25 struct data_info {
  26         struct related_list *related;
  27         enum data_type type;
  28         struct range_list *value_ranges;
  29 };
  30 DECLARE_ALLOCATOR(data_info);
  31
  32 extern struct string_list *__ignored_macros;
  33
  34 /* these are implimented in smatch_ranges.c */
  35 int is_whole_range_rl(struct range_list *rl);
  36 long long rl_min(struct range_list *rl);
  37 long long rl_max(struct range_list *rl);
  38 struct data_range *alloc_range_perm(long long min, long long max);
  39 struct range_list *alloc_range_list(long long min, long long max);
  40 struct range_list *whole_range_list(void);
  41 void add_range(struct range_list **list, long long min, long long max);
  42 int range_lists_equiv(struct range_list *one, struct range_list *two);
  43 struct range_list *invert_range_list(struct range_list *orig);
  44 int true_comparison_range(struct data_range *left, int comparison, struct data_range *right);
  45
  46 int possibly_true(struct expression *left, int comparison, struct expression *right);
  47 int possibly_true_range_lists(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
  48 int possibly_true_range_lists_rl(int comparison, struct range_list *a, struct range_list *b, int left);
  49
  50 int possibly_false(struct expression *left, int comparison, struct expression *right);
  51 int possibly_false_range_lists(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
  52 int possibly_false_range_lists_rl(int comparison, struct range_list *a, struct range_list *b, int left);
  53
  54 void free_range_list(struct range_list **rlist);
  55 void free_data_info_allocs(void);
  56 struct range_list *clone_range_list(struct range_list *list);
  57 struct range_list *clone_permanent(struct range_list *list);
  58 char *show_ranges(struct range_list *list);
  59 void get_value_ranges(char *value, struct range_list **rl);
  60
  61 struct range_list *remove_range(struct range_list *list, long long min, long long max);
  62
  63 /* used in smatch_slist.  implemented in smatch_extra.c */
  64 int implied_not_equal(struct expression *expr, long long val);
  65 struct sm_state *__extra_handle_canonical_loops(struct statement *loop, struct state_list **slist);
  66 int __iterator_unchanged(struct sm_state *sm);
  67 void __extra_pre_loop_hook_after(struct sm_state *sm,
  68                                 struct statement *iterator,
  69                                 struct expression *condition);
  70
  71 /* also implemented in smatch_extra */
  72 struct smatch_state *clone_estate(struct smatch_state *state);
  73 struct sm_state *set_extra_mod(const char *name, struct symbol *sym, struct smatch_state *state);
  74 struct sm_state *set_extra_expr_mod(struct expression *expr, struct smatch_state *state);
  75 void set_extra_expr_nomod(struct expression *expr, struct smatch_state *state);
  76 struct smatch_state *alloc_estate_empty(void);
  77 struct smatch_state *alloc_estate(long long val);
  78 struct smatch_state *alloc_estate_range_list(struct range_list *rl);
  79 struct data_info *get_dinfo(struct smatch_state *state);
  80 struct range_list *estate_ranges(struct smatch_state *state);
  81 struct related_list *estate_related(struct smatch_state *state);
  82 long long estate_min(struct smatch_state *state);
  83 long long estate_max(struct smatch_state *state);
  84 struct smatch_state *add_filter(struct smatch_state *orig, long long filter);
  85 struct smatch_state *extra_undefined(void);
  86
  87 struct range_list *range_list_union(struct range_list *one, struct range_list *two);
  88 int estate_get_single_value(struct smatch_state *estate, long long *val);
  89
  90 void function_comparison(int comparison, struct expression *expr, long long value, int left);
  91
  92 int true_comparison_range_lr(int comparison, struct data_range *var, struct data_range *val, int left);
  93 int false_comparison_range_lr(int comparison, struct data_range *var, struct data_range *val, int left);
  94 struct data_range *alloc_range(long long min, long long max);
  95 void tack_on(struct range_list **list, struct data_range *drange);
  96 int in_list_exact(struct range_list *list, struct data_range *drange);
  97
  98 struct smatch_state *alloc_estate_range(long long min, long long max);
  99
 100 void push_range_list(struct range_list_stack **rl_stack, struct range_list *rl);
 101 struct range_list *pop_range_list(struct range_list_stack **rl_stack);
 102 struct range_list *top_range_list(struct range_list_stack *rl_stack);
 103 void filter_top_range_list(struct range_list_stack **rl_stack, long long num);
 104 int get_implied_range_list(struct expression *expr, struct range_list **rl);
 105 int is_whole_range(struct smatch_state *state);
 106
 107 /* smatch_expressions.c */
 108 struct expression *zero_expr();
 109 struct expression *value_expr(long long val);
 110
 111 /* implemented in smatch_constraints */
 112 void set_equiv(struct expression *left, struct expression *right);
 113 struct relation *get_common_relationship(struct smatch_state *estate, int op,
 114                                         const char *name, struct symbol *sym);
 115 struct related_list *clone_related_list(struct related_list *related);
 116 void add_related(struct smatch_state *state, int op, const char *name, struct symbol *sym);
 117 void add_equiv(struct smatch_state *state, const char *name, struct symbol *sym);
 118 void remove_from_equiv(const char *name, struct symbol *sym);
 119 void remove_from_equiv_expr(struct expression *expr);
 120 void set_equiv_state_expr(int id, struct expression *expr, struct smatch_state *state);