/* * Copyright (C) 2009 Dan Carpenter. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt */ DECLARE_PTR_LIST(range_list, struct data_range); DECLARE_PTR_LIST(range_list_stack, struct range_list); struct relation { char *name; struct symbol *sym; }; DECLARE_PTR_LIST(related_list, struct relation); struct data_info { struct related_list *related; struct range_list *value_ranges; sval_t fuzzy_max; unsigned int hard_max:1; unsigned int capped:1; unsigned int treat_untagged:1; unsigned int set:1; }; DECLARE_ALLOCATOR(data_info); extern struct string_list *__ignored_macros; /* these are implemented in smatch_ranges.c */ struct range_list *rl_zero(void); struct range_list *rl_one(void); char *show_rl(struct range_list *list); int str_to_comparison_arg(const char *c, struct expression *call, int *comparison, struct expression **arg); void str_to_rl(struct symbol *type, char *value, struct range_list **rl); void call_results_to_rl(struct expression *call, struct symbol *type, const char *value, struct range_list **rl); struct data_range *alloc_range(sval_t min, sval_t max); struct data_range *alloc_range_perm(sval_t min, sval_t max); int rl_fits_in_type(struct range_list *rl, struct symbol *type); struct range_list *alloc_rl(sval_t min, sval_t max); struct range_list *clone_rl(struct range_list *list); struct range_list *clone_rl_permanent(struct range_list *list); struct range_list *alloc_whole_rl(struct symbol *type); void add_range(struct range_list **list, sval_t min, sval_t max); struct range_list *remove_range(struct range_list *list, sval_t min, sval_t max); void tack_on(struct range_list **list, struct data_range *drange); int true_comparison_range(struct data_range *left, int comparison, struct data_range *right); int true_comparison_range_LR(int comparison, struct data_range *var, struct data_range *val, int left); int false_comparison_range_LR(int comparison, struct data_range *var, struct data_range *val, int left); int possibly_true(struct expression *left, int comparison, struct expression *right); int possibly_true_rl(struct range_list *left_ranges, int comparison, struct range_list *right_ranges); int possibly_true_rl_LR(int comparison, struct range_list *a, struct range_list *b, int left); int possibly_false(struct expression *left, int comparison, struct expression *right); int possibly_false_rl(struct range_list *left_ranges, int comparison, struct range_list *right_ranges); int possibly_false_rl_LR(int comparison, struct range_list *a, struct range_list *b, int left); int rl_has_sval(struct range_list *rl, sval_t sval); int ranges_equiv(struct data_range *one, struct data_range *two); bool is_err_ptr(sval_t sval); int rl_equiv(struct range_list *one, struct range_list *two); int is_whole_rl(struct range_list *rl); int is_unknown_ptr(struct range_list *rl); int is_whole_rl_non_zero(struct range_list *rl); int estate_is_unknown(struct smatch_state *state); sval_t rl_min(struct range_list *rl); sval_t rl_max(struct range_list *rl); int rl_to_sval(struct range_list *rl, sval_t *sval); struct symbol *rl_type(struct range_list *rl); struct range_list *rl_filter(struct range_list *rl, struct range_list *filter); struct range_list *rl_intersection(struct range_list *one, struct range_list *two); struct range_list *rl_union(struct range_list *one, struct range_list *two); struct range_list *rl_binop(struct range_list *left, int op, struct range_list *right); void push_rl(struct range_list_stack **rl_stack, struct range_list *rl); struct range_list *pop_rl(struct range_list_stack **rl_stack); struct range_list *top_rl(struct range_list_stack *rl_stack); void filter_top_rl(struct range_list_stack **rl_stack, struct range_list *filter); struct range_list *rl_truncate_cast(struct symbol *type, struct range_list *rl); struct range_list *cast_rl(struct symbol *type, struct range_list *rl); int get_implied_rl(struct expression *expr, struct range_list **rl); int get_absolute_rl(struct expression *expr, struct range_list **rl); void set_real_absolute(struct expression *expr, struct smatch_state *state); int get_real_absolute_rl(struct expression *expr, struct range_list **rl); struct range_list *var_to_absolute_rl(struct expression *expr); int custom_get_absolute_rl(struct expression *expr, struct range_list *(*fn)(struct expression *expr), struct range_list **rl); int get_implied_rl_var_sym(const char *var, struct symbol *sym, struct range_list **rl); void split_comparison_rl(struct range_list *left_orig, int op, struct range_list *right_orig, struct range_list **left_true_rl, struct range_list **left_false_rl, struct range_list **right_true_rl, struct range_list **right_false_rl); void free_data_info_allocs(void); void free_all_rl(void); /* smatch_estate.c */ struct smatch_state *alloc_estate_empty(void); struct smatch_state *alloc_estate_sval(sval_t sval); struct smatch_state *alloc_estate_range(sval_t min, sval_t max); struct smatch_state *alloc_estate_rl(struct range_list *rl); struct smatch_state *alloc_estate_whole(struct symbol *type); struct smatch_state *clone_estate(struct smatch_state *state); struct smatch_state *clone_estate_cast(struct symbol *type, struct smatch_state *state); struct smatch_state *clone_partial_estate(struct smatch_state *state, struct range_list *rl); struct smatch_state *merge_estates(struct smatch_state *s1, struct smatch_state *s2); int estates_equiv(struct smatch_state *one, struct smatch_state *two); int estate_is_whole(struct smatch_state *state); int estate_is_empty(struct smatch_state *state); struct range_list *estate_rl(struct smatch_state *state); struct related_list *estate_related(struct smatch_state *state); sval_t estate_min(struct smatch_state *state); sval_t estate_max(struct smatch_state *state); struct symbol *estate_type(struct smatch_state *state); int estate_has_fuzzy_max(struct smatch_state *state); sval_t estate_get_fuzzy_max(struct smatch_state *state); void estate_set_fuzzy_max(struct smatch_state *state, sval_t max); void estate_copy_fuzzy_max(struct smatch_state *new, struct smatch_state *old); void estate_clear_fuzzy_max(struct smatch_state *state); int estate_has_hard_max(struct smatch_state *state); void estate_set_hard_max(struct smatch_state *state); void estate_clear_hard_max(struct smatch_state *state); int estate_get_hard_max(struct smatch_state *state, sval_t *sval); bool estate_capped(struct smatch_state *state); void estate_set_capped(struct smatch_state *state); bool estate_treat_untagged(struct smatch_state *state); void estate_set_treat_untagged(struct smatch_state *state); bool estate_new(struct smatch_state *state); void estate_set_new(struct smatch_state *state); int estate_get_single_value(struct smatch_state *state, sval_t *sval); struct smatch_state *get_implied_estate(struct expression *expr); struct smatch_state *estate_filter_sval(struct smatch_state *orig, sval_t filter); struct data_info *clone_dinfo_perm(struct data_info *dinfo); struct smatch_state *clone_estate_perm(struct smatch_state *state); /* smatch_extra.c */ bool is_impossible_variable(struct expression *expr); struct sm_state *get_extra_sm_state(struct expression *expr); struct smatch_state *get_extra_state(struct expression *expr); void call_extra_mod_hooks(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state); void set_extra_mod(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state); void set_extra_expr_mod(struct expression *expr, struct smatch_state *state); void set_extra_nomod(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state); void set_extra_nomod_vsl(const char *name, struct symbol *sym, struct var_sym_list *vsl, struct expression *expr, struct smatch_state *state); void set_extra_expr_nomod(struct expression *expr, struct smatch_state *state); void set_extra_mod_helper(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state); struct data_info *get_dinfo(struct smatch_state *state); void add_extra_mod_hook(void (*fn)(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state)); void add_extra_nomod_hook(void (*fn)(const char *name, struct symbol *sym, struct expression *expr, struct smatch_state *state)); int implied_not_equal(struct expression *expr, long long val); int implied_not_equal_name_sym(char *name, struct symbol *sym, long long val); int parent_is_null_var_sym(const char *name, struct symbol *sym); int parent_is_null(struct expression *expr); int parent_is_free_var_sym_strict(const char *name, struct symbol *sym); int parent_is_free_var_sym(const char *name, struct symbol *sym); int parent_is_free(struct expression *expr); struct sm_state *__extra_handle_canonical_loops(struct statement *loop, struct stree **stree); int __iterator_unchanged(struct sm_state *sm); void __extra_pre_loop_hook_after(struct sm_state *sm, struct statement *iterator, struct expression *condition); /* smatch_equiv.c */ void set_equiv(struct expression *left, struct expression *right); void set_related(struct smatch_state *estate, struct related_list *rlist); struct related_list *get_shared_relations(struct related_list *one, struct related_list *two); struct related_list *clone_related_list(struct related_list *related); void remove_from_equiv(const char *name, struct symbol *sym); void remove_from_equiv_expr(struct expression *expr); void set_equiv_state_expr(int id, struct expression *expr, struct smatch_state *state); /* smatch_function_hooks.c */ void function_comparison(struct expression *left, int comparison, struct expression *right); /* smatch_expressions.c */ struct expression *zero_expr(); struct expression *value_expr(long long val); struct expression *member_expression(struct expression *deref, int op, struct ident *member); struct expression *preop_expression(struct expression *expr, int op); struct expression *deref_expression(struct expression *expr); struct expression *assign_expression(struct expression *left, int op, struct expression *right); struct expression *binop_expression(struct expression *left, int op, struct expression *right); struct expression *array_element_expression(struct expression *array, struct expression *offset); struct expression *symbol_expression(struct symbol *sym); struct expression *string_expression(char *str); struct expression *compare_expression(struct expression *left, int op, struct expression *right); struct expression *call_expression(struct expression *fn, struct expression_list *args); struct expression *unknown_value_expression(struct expression *expr); int is_fake_call(struct expression *expr); struct expression *gen_expression_from_name_sym(const char *name, struct symbol *sym); struct expression *gen_expression_from_key(struct expression *arg, const char *key); void free_tmp_expressions(void); void expr_set_parent_expr(struct expression *expr, struct expression *parent); void expr_set_parent_stmt(struct expression *expr, struct statement *parent); struct expression *expr_get_parent_expr(struct expression *expr); struct statement *expr_get_parent_stmt(struct expression *expr); /* smatch_param_limit.c */ struct smatch_state *get_orig_estate(const char *name, struct symbol *sym); /* smatch_real_absolute.c */ struct smatch_state *get_real_absolute_state(struct expression *expr); struct smatch_state *get_real_absolute_state_var_sym(const char *name, struct symbol *sym); /* smatch_imaginary_absolute.c */ void __save_imaginary_state(struct expression *expr, struct range_list *true_rl, struct range_list *false_rl); int get_imaginary_absolute(struct expression *expr, struct range_list **rl);