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 };
  49 void add_hook(void *func, enum hook_type type);
  50 typedef struct smatch_state *(merge_func_t)(const char *name, struct symbol *sym, struct smatch_state *s1,
  51                            struct smatch_state *s2);
  52 void add_merge_hook(int client_id, merge_func_t *func);
  53
  54 #define smatch_msg(msg...) \
  55 do {                                                          \
  56         printf("%s %d %s(%d) ", get_filename(), get_lineno(), \
  57                get_function(), get_func_pos());               \
  58         printf(msg);                                          \
  59         printf("\n");                                         \
  60 } while (0)
  61
  62 #define SM_DEBUG(msg...) do { if (debug_states) printf(msg); } while (0)
  63
  64 #define UNDEFINED INT_MIN
  65
  66 struct smatch_state *get_state(const char *name, int owner, struct symbol *sym);
  67 void add_state(const char *name, int owner, struct symbol *sym, struct smatch_state *state);
  68 void set_state(const char *name, int owner, struct symbol *sym, struct smatch_state *state);
  69 void delete_state(const char *name, int owner, struct symbol *sym);
  70 void set_true_false_states(const char *name, int owner, struct symbol *sym,
  71                            struct smatch_state *true_state, struct smatch_state *false_state);
  72 int state_defined(const char *name, int owner, struct symbol *sym);
  73
  74 struct state_list *get_all_states();
  75 void nullify_path();
  76 void __unnullify_path();
  77 void clear_all_states();
  78
  79 char *get_filename();
  80 char *get_function();
  81 int get_lineno();
  82 int get_func_pos();
  83
  84 /* smatch_helper.c */
  85 char *alloc_string(char *str);
  86 void free_string(char *str);
  87 struct expression *get_argument_from_call_expr(struct expression_list *args,
  88                                                int num);
  89 char * get_variable_from_expr(struct expression * expr,
  90                               struct symbol **sym_ptr);
  91 char * get_variable_from_expr_simple(struct expression * expr,
  92                               struct symbol **sym_ptr);
  93 int sym_name_is(const char *name, struct expression *expr);
  94 int get_value(struct expression *expr, int *discard);
  95 int is_zero(struct expression *expr);
  96
  97 /* ----------------------------------------------------------------
  98    The stuff below is all used internally and shouldn't
  99    be called from other programs
 100  -----------------------------------------------------------------*/
 101
 102 /* smatch_flow.c */
 103
 104 void smatch (int argc, char **argv);
 105 void __split_expr(struct expression *expr);
 106
 107 /* smatch_conditions */
 108 void __split_whole_condition(struct expression *expr);
 109
 110 /* smatch_extras.c */
 111 int known_condition_true(struct expression *expr);
 112
 113 /* smatch_states.c */
 114
 115 extern int debug_states;
 116
 117 void __use_false_only_stack();
 118 void __pop_false_only_stack();
 119 void __push_true_states();
 120 void __use_false_states();
 121 void __pop_false_states();
 122 void __merge_false_states();
 123 void __merge_true_states();
 124
 125 void __negate_cond_stacks();
 126 void __use_cond_true_states();
 127 void __use_cond_false_states();
 128 void __push_cond_stacks();
 129 void __and_cond_states();
 130 void __or_cond_states();
 131 void __save_pre_cond_states();
 132 void __pop_pre_cond_states();
 133 void __use_cond_states();
 134
 135 void __push_continues();
 136 void __pop_continues();
 137 void __process_continues();
 138 void __merge_continues();
 139
 140 void __push_breaks();
 141 void __process_breaks();
 142 void __merge_breaks();
 143 void __use_breaks();
 144
 145 void __save_switch_states();
 146 void __pop_switches();
 147 void __merge_switches();
 148 void __push_default();
 149 void __set_default();
 150 int __pop_default();
 151
 152 void __push_conditions();
 153 void __pop_conditions();
 154 void __overwrite_true_states();
 155
 156 void __save_gotos(const char *name);
 157 void __merge_gotos(const char *name);
 158
 159 void __print_cur_slist();
 160
 161 /* smatch_hooks.c */
 162 void __pass_to_client(void *data, enum hook_type type);
 163 void __pass_declarations_to_client(struct symbol_list *sym_list);
 164 int __has_merge_function(int client_id);
 165 struct smatch_state *__client_merge_function(int owner, const char *name, struct symbol *sym,
 166                             struct smatch_state *s1, struct smatch_state *s2);
 167
 168 #endif      /* !SMATCH_H_ */