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 struct data_range *alloc_range_perm(long long min, long long max);
  37 void add_range(struct range_list **list, long long min, long long max);
  38 int true_comparison_range(struct data_range *left, int comparison, struct data_range *right);
  39 int possibly_true(int comparison, struct data_info *dinfo, long long num, int left);
  40 int possibly_true_range_lists(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
  41 int possibly_true_range_list_lr(int comparison, struct data_info *dinfo, struct range_list *values, int left);
  42 int possibly_false(int comparison, struct data_info *dinfo, long long num, int left);
  43 int possibly_false_range_lists(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
  44 int possibly_false_range_list_lr(int comparison, struct data_info *dinfo, struct range_list *values, int left);
  45 void free_range_list(struct range_list **rlist);
  46 void free_data_info_allocs(void);
  47 struct range_list *clone_range_list(struct range_list *list);
  48 char *show_ranges(struct range_list *list);
  49 struct range_list *remove_range(struct range_list *list, long long min, long long max);
  50
  51 /* used in smatch_slist.  implemented in smatch_extra.c */
  52 int implied_not_equal(struct expression *expr, long long val);
  53 struct sm_state *__extra_handle_canonical_loops(struct statement *loop, struct state_list **slist);
  54 int __iterator_unchanged(struct sm_state *sm);
  55 void __extra_pre_loop_hook_after(struct sm_state *sm,
  56                                 struct statement *iterator,
  57                                 struct expression *condition);
  58
  59 /* also implemented in smatch_extra */
  60 struct smatch_state *clone_extra_state(struct smatch_state *state);
  61 struct sm_state *set_extra_mod(const char *name, struct symbol *sym, struct smatch_state *state);
  62 struct sm_state *set_extra_expr_mod(struct expression *expr, struct smatch_state *state);
  63 void set_extra_expr_nomod(struct expression *expr, struct smatch_state *state);
  64 struct smatch_state *alloc_extra_state_empty(void);
  65 struct smatch_state *alloc_extra_state(long long val);
  66 struct smatch_state *alloc_extra_state_range_list(struct range_list *rl);
  67 struct range_list *get_range_list(struct expression *expr);
  68 struct data_info *get_dinfo(struct smatch_state *state);
  69 struct smatch_state *add_filter(struct smatch_state *orig, long long filter);
  70 struct smatch_state *extra_undefined(void);
  71
  72 struct range_list *range_list_union(struct range_list *one, struct range_list *two);
  73 long long get_dinfo_min(struct data_info *dinfo);
  74 long long get_dinfo_max(struct data_info *dinfo);
  75 int get_single_value_from_dinfo(struct data_info *dinfo, long long *val);
  76
  77 void function_comparison(int comparison, struct expression *expr, long long value, int left);
  78
  79 int true_comparison_range_lr(int comparison, struct data_range *var, struct data_range *val, int left);
  80 int false_comparison_range_lr(int comparison, struct data_range *var, struct data_range *val, int left);
  81 struct data_range *alloc_range(long long min, long long max);
  82 void tack_on(struct range_list **list, struct data_range *drange);
  83 int in_list_exact(struct range_list *list, struct data_range *drange);
  84
  85 struct smatch_state *alloc_extra_state_range(long long min, long long max);
  86
  87 void push_range_list(struct range_list_stack **rl_stack, struct range_list *rl);
  88 struct range_list *pop_range_list(struct range_list_stack **rl_stack);
  89 struct range_list *top_range_list(struct range_list_stack *rl_stack);
  90 void filter_top_range_list(struct range_list_stack **rl_stack, long long num);
  91 int get_implied_range_list(struct expression *expr, struct range_list **rl);
  92 int is_whole_range(struct smatch_state *state);
  93
  94 /* implemented in smatch_constraints */
  95 struct relation *get_common_relationship(struct data_info *dinfo, int op,
  96                                         const char *name, struct symbol *sym);
  97 struct related_list *clone_related_list(struct related_list *related);
  98 void add_related(struct smatch_state *state, int op, const char *name, struct symbol *sym);
  99 void add_equiv(struct smatch_state *state, const char *name, struct symbol *sym);
 100 void remove_from_equiv(const char *name, struct symbol *sym);
 101 void remove_from_equiv_expr(struct expression *expr);
 102 void set_equiv_state_expr(int id, struct expression *expr, struct smatch_state *state);