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 "lib.h"
  16 #include "allocate.h"
  17 #include "parse.h"
  18 #include "expression.h"
  19
  20 #define KERNEL
  21
  22 struct state_history {
  23         unsigned int loc;
  24 };
  25 DECLARE_PTR_LIST(history_list, struct state_history);
  26
  27 struct smatch_state {
  28         char *name;
  29         unsigned int owner;
  30         struct symbol *sym;
  31         int state;
  32         struct history_list *line_history;
  33         struct history_list *path_history;
  34 };
  35
  36 enum hook_type {
  37         EXPR_HOOK,
  38         STMT_HOOK,
  39         SYM_HOOK,
  40         DECLARATION_HOOK,
  41         ASSIGNMENT_HOOK,
  42         ASSIGNMENT_AFTER_HOOK,
  43         CONDITION_HOOK,
  44         WHOLE_CONDITION_HOOK,
  45         FUNCTION_CALL_HOOK,
  46         FUNCTION_CALL_AFTER_HOOK,
  47         DEREF_HOOK,
  48         BASE_HOOK,
  49         FUNC_DEF_HOOK,
  50         END_FUNC_HOOK,
  51         RETURN_HOOK,
  52 };
  53 void add_hook(void *func, enum hook_type type);
  54 typedef int (merge_func_t)(const char *name, struct symbol *sym, int s1,
  55                            int s2);
  56 void add_merge_hook(int client_id, merge_func_t *func);
  57
  58 #define smatch_msg(msg...) \
  59 do {                                                          \
  60         printf("%s %d %s(%d) ", get_filename(), get_lineno(), \
  61                get_function(), get_func_pos());               \
  62         printf(msg);                                          \
  63         printf("\n");                                         \
  64 } while (0)
  65
  66 #define SM_DEBUG(msg...) do { if (debug_states) printf(msg); } while (0)
  67
  68 #define NOTFOUND -2
  69 #define UNDEFINED -1
  70
  71 int get_state(const char *name, int owner, struct symbol *sym);
  72 void add_state(const char *name, int owner, struct symbol *sym, int state);
  73 void set_state(const char *name, int owner, struct symbol *sym, int 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                            int true_state, int false_state);
  77 int state_defined(const char *name, int owner, struct symbol *sym);
  78
  79 struct state_list *get_all_states();
  80 void nullify_path();
  81 void clear_all_states();
  82
  83 char *get_filename();
  84 char *get_function();
  85 int get_lineno();
  86 int get_func_pos();
  87
  88 /* smatch_helper.c */
  89 char *alloc_string(char *str);
  90 void free_string(char *str);
  91 struct expression *get_argument_from_call_expr(struct expression_list *args,
  92                                                int num);
  93 char * get_variable_from_expr(struct expression * expr,
  94                               struct symbol **sym_ptr);
  95 char * get_variable_from_expr_simple(struct expression * expr,
  96                               struct symbol **sym_ptr);
  97 int sym_name_is(const char *name, struct expression *expr);
  98
  99 /* ----------------------------------------------------------------
 100    The stuff below is all used internally and shouldn't
 101    be called from other programs
 102  -----------------------------------------------------------------*/
 103
 104 /* smatch_flow.c */
 105
 106 void smatch (int argc, char **argv);
 107 void __split_expr(struct expression *expr);
 108
 109 /* smatch_conditions */
 110 extern int __ands;
 111 extern int __ors;
 112 int __negate();
 113 void __split_whole_condition(struct expression *expr);
 114
 115 /* smatch_states.c */
 116
 117 extern int debug_states;
 118
 119 void __prep_false_only_stack();
 120 void __use_false_only_stack();
 121 void __use_true_states();
 122 void __use_false_states();
 123 void __pop_false_states();
 124 void __merge_false_states();
 125 void __merge_true_states();
 126 void __pop_true_states();
 127
 128 void __negate_cond_stacks();
 129 void __use_cond_true_states();
 130 void __use_cond_false_states();
 131 void __push_cond_stacks();
 132 void __and_cond_states();
 133 void __or_cond_states();
 134 void __save_pre_cond_states();
 135 void __pop_pre_cond_states();
 136 void __use_cond_states();
 137
 138 void __push_continues();
 139 void __pop_continues();
 140 void __process_continues();
 141 void __merge_continues();
 142
 143 void __push_breaks();
 144 void __pop_breaks();
 145 void __process_breaks();
 146 void __merge_breaks();
 147
 148 void __save_switch_states();
 149 void __pop_switches();
 150 void __merge_switches();
 151 void __push_default();
 152 void __set_default();
 153 int __pop_default();
 154
 155 void __push_conditions();
 156 void __pop_conditions();
 157 void __overwrite_true_states();
 158
 159 void __save_gotos(const char *name);
 160 void __merge_gotos(const char *name);
 161
 162 void __print_cur_slist();
 163
 164 /* smatch_hooks.c */
 165 void __pass_to_client(void *data, enum hook_type type);
 166 void __pass_declarations_to_client(struct symbol_list *sym_list);
 167 int __has_merge_function(int client_id);
 168 int __client_merge_function(int owner, const char *name, struct symbol *sym,
 169                             int s1, int s2);
 170
 171 #endif      /* !SMATCH_H_ */