smatch_param_bits_set.c

   1 /*
   2  * Copyright (C) 2021 Oracle
   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 #include "scope.h"
  18 #include "smatch.h"
  19 #include "smatch_slist.h"
  20 #include "smatch_extra.h"
  21
  22 static int my_id;
  23
  24 void __set_param_modified_helper(struct expression *expr, struct  smatch_state *state)
  25 {
  26         set_state_expr(my_id, expr, state);
  27 }
  28
  29 void __set_param_modified_helper_sym(const char *name, struct symbol *sym,
  30                                      struct smatch_state *state)
  31 {
  32         set_state(my_id, name, sym, state);
  33 }
  34
  35 static struct smatch_state *unmatched_state(struct sm_state *sm)
  36 {
  37         return alloc_bstate(0, 0);
  38 }
  39
  40 static void return_info_callback(int return_id, char *return_ranges,
  41                                  struct expression *returned_expr,
  42                                  int param,
  43                                  const char *printed_name,
  44                                  struct sm_state *sm)
  45 {
  46         unsigned long long bits_set;
  47         char buffer[64];
  48         struct smatch_state *estate;
  49         struct bit_info *binfo;
  50         sval_t sval;
  51
  52         estate = get_state(SMATCH_EXTRA, sm->name, sm->sym);
  53         if (estate_get_single_value(estate, &sval))
  54                 return;
  55
  56         binfo = sm->state->data;
  57         bits_set = binfo->set;
  58
  59         if (bits_set == 0)
  60                 return;
  61
  62         sprintf(buffer, "0x%llx", bits_set);
  63         sql_insert_return_states(return_id, return_ranges, BIT_SET, param, printed_name, buffer);
  64 }
  65
  66 void register_param_bits_set(int id)
  67 {
  68         my_id = id;
  69
  70         set_dynamic_states(my_id);
  71
  72         add_unmatched_state_hook(my_id, &unmatched_state);
  73         add_merge_hook(my_id, &merge_bstates);
  74
  75         add_return_info_callback(my_id, return_info_callback);
  76 }