smatch_kernel_task_state.c

   1 /*
   2  * Copyright 2023 Linaro Ltd.
   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 #include "smatch_slist.h"
  20
  21 static int my_id;
  22
  23 STATE(not_running);
  24
  25 bool task_not_running(void)
  26 {
  27         if (has_possible_state(my_id, "task_state", NULL, &not_running))
  28                 return true;
  29         return false;
  30 }
  31
  32 static void state_change_hook(struct expression *expr, const char *str)
  33 {
  34         if (strcmp(str, "not_running") == 0)
  35                 set_state(my_id, "task_state", NULL, &not_running);
  36         else
  37                 set_state(my_id, "task_state", NULL, &undefined);
  38 }
  39
  40 static void called_not_running(const char *name, struct symbol *sym, char *key, char *value)
  41 {
  42         set_state(my_id, "task_state", NULL, &not_running);
  43 }
  44
  45 static void match_call_info(struct expression *expr)
  46 {
  47         if (task_not_running())
  48                 sql_insert_caller_info(expr, TASK_NOT_RUNNING, -2, "", "");
  49 }
  50
  51 void register_kernel_task_state(int id)
  52 {
  53         my_id = id;
  54
  55         if (option_project != PROJ_KERNEL)
  56                 return;
  57
  58         add_set_current_state_hook(state_change_hook);
  59         select_caller_info_hook(&called_not_running, TASK_NOT_RUNNING);
  60         add_hook(&match_call_info, FUNCTION_CALL_HOOK);
  61 }