smatch_hooks.c

   1 /*
   2  * sparse/smatch_hooks.c
   3  *
   4  * Copyright (C) 2006 Dan Carpenter.
   5  *
   6  *  Licensed under the Open Software License version 1.1
   7  *
   8  */
   9
  10 #include "smatch.h"
  11
  12 struct hook_container {
  13         int hook_type;
  14         int data_type;
  15         void * fn;
  16 };
  17 ALLOCATOR(hook_container, "hook functions");
  18 DECLARE_PTR_LIST(hook_func_list, struct hook_container);
  19 static struct hook_func_list *hook_funcs;
  20 static struct hook_func_list *merge_funcs;
  21
  22 void add_hook(void *func, enum hook_type type)
  23 {
  24         struct hook_container *container = __alloc_hook_container(0);
  25         container->hook_type = type;
  26         container->fn = func;
  27         switch(type) {
  28         case EXPR_HOOK:
  29                 container->data_type = EXPR_HOOK;
  30                 break;
  31         case STMT_HOOK:
  32                 container->data_type = STMT_HOOK;
  33                 break;
  34         case SYM_HOOK:
  35                 container->data_type = SYM_HOOK;
  36                 break;
  37         case DECLARATION_HOOK:
  38                 container->data_type = SYM_HOOK;
  39                 break;
  40         case ASSIGNMENT_HOOK:
  41                 container->data_type = EXPR_HOOK;
  42                 break;
  43         case ASSIGNMENT_AFTER_HOOK:
  44                 container->data_type = EXPR_HOOK;
  45                 break;
  46         case CONDITION_HOOK:
  47                 container->data_type = EXPR_HOOK;
  48                 break;
  49         case WHOLE_CONDITION_HOOK:
  50                 container->data_type = EXPR_HOOK;
  51                 break;
  52         case FUNCTION_CALL_HOOK:
  53                 container->data_type = EXPR_HOOK;
  54                 break;
  55         case FUNCTION_CALL_AFTER_HOOK:
  56                 container->data_type = EXPR_HOOK;
  57                 break;
  58         case DEREF_HOOK:
  59                 container->data_type = EXPR_HOOK;
  60                 break;
  61         case BASE_HOOK:
  62                 container->data_type = SYM_HOOK;
  63                 break;
  64         case FUNC_DEF_HOOK:
  65                 container->data_type = SYM_HOOK;
  66                 break;
  67         case END_FUNC_HOOK:
  68                 container->data_type = SYM_HOOK;
  69                 break;
  70         case RETURN_HOOK:
  71                 container->data_type = STMT_HOOK;
  72                 break;
  73         }
  74         add_ptr_list(&hook_funcs, container);
  75 }
  76
  77 void add_merge_hook(int client_id, merge_func_t *func)
  78 {
  79         struct hook_container *container = __alloc_hook_container(0);
  80         container->data_type = client_id;
  81         container->fn = func;
  82         add_ptr_list(&merge_funcs, container);
  83 }
  84
  85
  86 static void pass_expr_to_client(void * fn, void * data)
  87 {
  88         typedef void (expr_func)(struct expression *expr);
  89         ((expr_func *) fn)((struct expression *) data);
  90 }
  91
  92 static void pass_stmt_to_client(void * fn, void * data)
  93 {
  94         typedef void (stmt_func)(struct statement *stmt);
  95         ((stmt_func *) fn)((struct statement *) data);
  96 }
  97
  98 static void pass_sym_to_client(void * fn, void * data)
  99 {
 100         typedef void (sym_func)(struct symbol *sym);
 101         ((sym_func *) fn)((struct symbol *) data);
 102 }
 103
 104 void __pass_to_client(void *data, enum hook_type type)
 105 {
 106         struct hook_container *container;
 107
 108         if (!data)
 109                 return;
 110
 111         FOR_EACH_PTR(hook_funcs, container) {
 112                 if (container->hook_type == type) {
 113                         switch(container->data_type) {
 114                         case EXPR_HOOK:
 115                                 pass_expr_to_client(container->fn, data);
 116                                 break;
 117                         case STMT_HOOK:
 118                                 pass_stmt_to_client(container->fn, data);
 119                                 break;
 120                         case SYM_HOOK:
 121                                 pass_sym_to_client(container->fn, data);
 122                                 break;
 123                         }
 124                 }
 125         } END_FOR_EACH_PTR(container);
 126 }
 127
 128 void __pass_declarations_to_client(struct symbol_list *sym_list)
 129 {
 130         struct symbol *sym;
 131         FOR_EACH_PTR(sym_list, sym) {
 132                 __pass_to_client(sym, DECLARATION_HOOK);
 133         } END_FOR_EACH_PTR(sym);
 134 }
 135
 136 int __has_merge_function(int client_id)
 137 {
 138         struct hook_container *tmp;
 139
 140         FOR_EACH_PTR(merge_funcs, tmp) {
 141                 if (tmp->data_type == client_id)
 142                         return 1;
 143         } END_FOR_EACH_PTR(tmp);
 144         return 0;
 145 }
 146
 147 int __client_merge_function(int owner, const char *name, struct symbol *sym,
 148                             int s1, int s2)
 149 {
 150         struct hook_container *tmp;
 151
 152         FOR_EACH_PTR(merge_funcs, tmp) {
 153                 if (tmp->data_type == owner)
 154                         return ((merge_func_t *) tmp->fn)(name, sym, s1, s2);
 155         } END_FOR_EACH_PTR(tmp);
 156         return UNDEFINED;
 157 }