smatch.h

   1 /*
   2  * sparse/smatch.h
   3  *
   4  * Copyright (C) 2006 Dan Carpenter.
   5  *
   6  *  Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #ifndef         SMATCH_H_
  11 # define        SMATCH_H_
  12
  13 #include <stdio.h>
  14 #include <string.h>
  15 #include <limits.h>
  16 #include "lib.h"
  17 #include "allocate.h"
  18 #include "parse.h"
  19 #include "expression.h"
  20
  21 #define KERNEL
  22 struct smatch_state {
  23         const char *name;
  24         void *data;
  25 };
  26 #define STATE(_x) static struct smatch_state _x = { .name = #_x }
  27 extern struct smatch_state undefined;
  28 extern struct smatch_state true_state;
  29 extern struct smatch_state false_state;
  30
  31 enum hook_type {
  32         EXPR_HOOK,
  33         STMT_HOOK,
  34         SYM_HOOK,
  35         DECLARATION_HOOK,
  36         ASSIGNMENT_HOOK,
  37         ASSIGNMENT_AFTER_HOOK,
  38         CONDITION_HOOK,
  39         WHOLE_CONDITION_HOOK,
  40         FUNCTION_CALL_HOOK,
  41         FUNCTION_CALL_AFTER_HOOK,
  42         OP_HOOK,
  43         DEREF_HOOK,
  44         BASE_HOOK,
  45         FUNC_DEF_HOOK,
  46         END_FUNC_HOOK,
  47         RETURN_HOOK,
  48         END_FILE_HOOK,
  49 };
  50 void add_hook(void *func, enum hook_type type);
  51 typedef struct smatch_state *(merge_func_t)(const char *name,
  52                                             struct symbol *sym,
  53                                             struct smatch_state *s1,
  54                                             struct smatch_state *s2);
  55 void add_merge_hook(int client_id, merge_func_t *func);
  56
  57 #define smatch_msg(msg...) \
  58 do {                                                          \
  59         printf("%s +%d %s(%d) ", get_filename(), get_lineno(), \
  60                get_function(), get_func_pos());               \
  61         printf(msg);                                          \
  62         printf("\n");                                         \
  63 } while (0)
  64
  65 #define SM_DEBUG(msg...) do { if (debug_states) printf(msg); } while (0)
  66
  67 #define UNDEFINED INT_MIN
  68
  69 struct smatch_state *get_state(const char *name, int owner, struct symbol *sym);
  70 struct state_list *get_possible_states(const char *name, int owner,
  71                                        struct symbol *sym);
  72 void set_state(const char *name, int owner, struct symbol *sym,
  73                struct smatch_state *state);
  74 void delete_state(const char *name, int owner, struct symbol *sym);
  75 void set_true_false_states(const char *name, int owner, struct symbol *sym,
  76                            struct smatch_state *true_state,
  77                            struct smatch_state *false_state);
  78
  79 struct state_list *get_all_states(int id);
  80 char *get_filename();
  81 char *get_function();
  82 int get_lineno();
  83 int get_func_pos();
  84
  85 /* smatch_helper.c */
  86 char *alloc_string(char *str);
  87 void free_string(char *str);
  88 struct expression *get_argument_from_call_expr(struct expression_list *args,
  89                                                int num);
  90 char *get_variable_from_expr_complex(struct expression *expr,
  91                                      struct symbol **sym_ptr);
  92 char *get_variable_from_expr(struct expression *expr,
  93                              struct symbol **sym_ptr);
  94 int sym_name_is(const char *name, struct expression *expr);
  95 int get_value(struct expression *expr);
  96 int is_zero(struct expression *expr);
  97 const char *show_state(struct smatch_state *state);
  98 struct expression *strip_expr(struct expression *expr);
  99
 100 /* smatch_ignore.c */
 101 struct tracker {
 102         const char *name;
 103         int owner;
 104         struct symbol *sym;
 105 };
 106 DECLARE_PTR_LIST(tracker_list, struct tracker);
 107
 108 void add_ignore(const char *name, int owner, struct symbol *sym);
 109 int is_ignored(const char *name, int owner, struct symbol *sym);
 110
 111 /* smatch_conditions */
 112 int in_condition();
 113
 114 /* ----------------------------------------------------------------
 115    The stuff below is all used internally and shouldn't
 116    be called from other programs
 117  -----------------------------------------------------------------*/
 118
 119 /* smatch_flow.c */
 120
 121 void smatch (int argc, char **argv);
 122 void __split_expr(struct expression *expr);
 123
 124 /* smatch_conditions */
 125 void __split_whole_condition(struct expression *expr);
 126
 127 /* smatch_implied.c */
 128 void __implied_states_hook(struct expression *expr);
 129
 130 /* smatch_extras.c */
 131 #define SMATCH_EXTRA 1 /* this is my_id from smatch extra set in smatch.c */
 132 int known_condition_true(struct expression *expr);
 133
 134 /* smatch_states.c */
 135 extern int debug_states;
 136
 137 void nullify_path();
 138 void __unnullify_path();
 139 int __path_is_null();
 140 void clear_all_states();
 141
 142 struct sm_state *__get_sm_state(const char *name, int owner,
 143                                 struct symbol *sym);
 144 void __overwrite_cur_slist(struct state_list *slist);
 145 void __use_false_only_stack();
 146 void __pop_false_only_stack();
 147 void __push_true_states();
 148 void __use_false_states();
 149 void __pop_false_states();
 150 void __merge_false_states();
 151 void __merge_true_states();
 152
 153 void __negate_cond_stacks();
 154 void __use_cond_true_states();
 155 void __use_cond_false_states();
 156 void __push_cond_stacks();
 157 void __and_cond_states();
 158 void __or_cond_states();
 159 void __save_pre_cond_states();
 160 void __pop_pre_cond_states();
 161 void __use_cond_states();
 162
 163 void __push_continues();
 164 void __pop_continues();
 165 void __process_continues();
 166 void __merge_continues();
 167
 168 void __push_breaks();
 169 void __process_breaks();
 170 void __merge_breaks();
 171 void __use_breaks();
 172
 173 void __save_switch_states();
 174 void __pop_switches();
 175 void __merge_switches();
 176 void __push_default();
 177 void __set_default();
 178 int __pop_default();
 179
 180 void __push_conditions();
 181 void __pop_conditions();
 182 void __overwrite_true_states();
 183
 184 void __save_gotos(const char *name);
 185 void __merge_gotos(const char *name);
 186
 187 void __print_cur_slist();
 188
 189 /* smatch_hooks.c */
 190 void __pass_to_client(void *data, enum hook_type type);
 191 void __pass_to_client_no_data(enum hook_type type);
 192 void __pass_declarations_to_client(struct symbol_list *sym_list);
 193 int __has_merge_function(int client_id);
 194 struct smatch_state *__client_merge_function(int owner, const char *name, struct symbol *sym,
 195                             struct smatch_state *s1, struct smatch_state *s2);
 196
 197 #endif      /* !SMATCH_H_ */