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 data_info {
  18         struct tracker_list *equiv;
  19         enum data_type type;
  20         struct range_list *value_ranges;
  21 };
  22 DECLARE_ALLOCATOR(data_info);
  23
  24 /* these are implimented in smatch_ranges.c */
  25 struct data_range *alloc_range_perm(long long min, long long max);
  26 void add_range(struct range_list **list, long long min, long long max);
  27 int true_comparison_range(struct data_range *left, int comparison, struct data_range *right);
  28 int possibly_true(int comparison, struct data_info *dinfo, long long num, int left);
  29 int possibly_true_range_lists(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
  30 int possibly_true_range_list_lr(int comparison, struct data_info *dinfo, struct range_list *values, int left);
  31 int possibly_false(int comparison, struct data_info *dinfo, long long num, int left);
  32 int possibly_false_range_lists(struct range_list *left_ranges, int comparison, struct range_list *right_ranges);
  33 int possibly_false_range_list_lr(int comparison, struct data_info *dinfo, struct range_list *values, int left);
  34 void free_range_list(struct range_list **rlist);
  35 void free_data_info_allocs(void);
  36 struct range_list *clone_range_list(struct range_list *list);
  37 char *show_ranges(struct range_list *list);
  38 struct range_list *remove_range(struct range_list *list, long long min, long long max);
  39
  40 /* used in smatch_slist.  implemented in smatch_extra.c */
  41 int implied_not_equal(struct expression *expr, long long val);
  42 struct sm_state *__extra_handle_canonical_loops(struct statement *loop, struct state_list **slist);
  43 int __iterator_unchanged(struct sm_state *sm);
  44 void __extra_pre_loop_hook_after(struct sm_state *sm,
  45                                 struct statement *iterator,
  46                                 struct expression *condition);
  47
  48 /* also implemented in smatch_extra */
  49 struct sm_state *set_extra_mod(const char *name, struct symbol *sym, struct smatch_state *state);
  50 struct sm_state *set_extra_expr_mod(struct expression *expr, struct smatch_state *state);
  51 void set_extra_expr_nomod(struct expression *expr, struct smatch_state *state);
  52 struct smatch_state *alloc_extra_state(long long val);
  53 struct smatch_state *alloc_extra_state_range_list(struct range_list *rl);
  54 struct range_list *get_range_list(struct expression *expr);
  55 struct data_info *get_dinfo(struct smatch_state *state);
  56 struct smatch_state *add_filter(struct smatch_state *orig, long long filter);
  57 struct smatch_state *extra_undefined(void);
  58
  59 struct range_list *range_list_union(struct range_list *one, struct range_list *two);
  60 long long get_dinfo_min(struct data_info *dinfo);
  61 long long get_dinfo_max(struct data_info *dinfo);
  62 int get_single_value_from_dinfo(struct data_info *dinfo, long long *val);
  63
  64 void function_comparison(int comparison, struct expression *expr, long long value, int left);
  65
  66 int true_comparison_range_lr(int comparison, struct data_range *var, struct data_range *val, int left);
  67 int false_comparison_range_lr(int comparison, struct data_range *var, struct data_range *val, int left);
  68 struct data_range *alloc_range(long long min, long long max);
  69 void tack_on(struct range_list **list, struct data_range *drange);
  70 int in_list_exact(struct range_list *list, struct data_range *drange);
  71
  72 struct smatch_state *alloc_extra_state_range(long long min, long long max);
  73
  74 void push_range_list(struct range_list_stack **rl_stack, struct range_list *rl);
  75 struct range_list *pop_range_list(struct range_list_stack **rl_stack);
  76 struct range_list *top_range_list(struct range_list_stack *rl_stack);
  77 void filter_top_range_list(struct range_list_stack **rl_stack, long long num);
  78 int get_implied_range_list(struct expression *expr, struct range_list **rl);
  79 int is_whole_range(struct smatch_state *state);