smatch_tracker.c

   1 /*
   2  * Copyright (C) 2009 Dan Carpenter.
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, see http://www.gnu.org/copyleft/gpl.txt
  16  */
  17
  18 #include "smatch.h"
  19
  20 ALLOCATOR(tracker, "trackers");
  21
  22 struct tracker *alloc_tracker(int owner, const char *name, struct symbol *sym)
  23 {
  24         struct tracker *tmp;
  25
  26         tmp = __alloc_tracker(0);
  27         tmp->name = alloc_string(name);
  28         tmp->owner = owner;
  29         tmp->sym = sym;
  30         return tmp;
  31 }
  32
  33 void add_tracker(struct tracker_list **list, int owner, const char *name,
  34                 struct symbol *sym)
  35 {
  36         struct tracker *tmp;
  37
  38         if (in_tracker_list(*list, owner, name, sym))
  39                 return;
  40         tmp = alloc_tracker(owner, name, sym);
  41         add_ptr_list(list, tmp);
  42 }
  43
  44 void add_tracker_expr(struct tracker_list **list, int owner, struct expression *expr)
  45 {
  46         char *name;
  47         struct symbol *sym;
  48
  49         name = expr_to_var_sym(expr, &sym);
  50         if (!name || !sym)
  51                 goto free;
  52         add_tracker(list, owner, name, sym);
  53 free:
  54         free_string(name);
  55 }
  56
  57 static void free_tracker(struct tracker *t)
  58 {
  59         free_string(t->name);
  60         __free_tracker(t);
  61 }
  62
  63 void del_tracker(struct tracker_list **list, int owner, const char *name,
  64                 struct symbol *sym)
  65 {
  66         struct tracker *tmp;
  67
  68         FOR_EACH_PTR(*list, tmp) {
  69                 if (tmp->owner == owner && tmp->sym == sym
  70                     && !strcmp(tmp->name, name)) {
  71                         DELETE_CURRENT_PTR(tmp);
  72                         free_tracker(tmp);
  73                         return;
  74                 }
  75         } END_FOR_EACH_PTR(tmp);
  76 }
  77
  78 int in_tracker_list(struct tracker_list *list, int owner, const char *name,
  79                 struct symbol *sym)
  80 {
  81         struct tracker *tmp;
  82
  83         FOR_EACH_PTR(list, tmp) {
  84                 if (tmp->owner == owner && tmp->sym == sym
  85                     && !strcmp(tmp->name, name))
  86                         return 1;
  87         } END_FOR_EACH_PTR(tmp);
  88         return 0;
  89 }
  90
  91 void free_tracker_list(struct tracker_list **list)
  92 {
  93         __free_ptr_list((struct ptr_list **)list);
  94 }
  95
  96 void free_trackers_and_list(struct tracker_list **list)
  97 {
  98         struct tracker *tmp;
  99
 100         FOR_EACH_PTR(*list, tmp) {
 101                 free_tracker(tmp);
 102         } END_FOR_EACH_PTR(tmp);
 103         free_tracker_list(list);
 104 }
 105