gdb/testsuite/gdb.base/empty-host-env-vars.exp

   1 # Copyright 2021 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # GDB reads some environment variables on startup, make sure it behaves
  17 # correctly if these variables are defined but empty.
  18
  19 set all_env_vars { HOME XDG_CACHE_HOME LOCALAPPDATA XDG_CONFIG_HOME }
  20
  21 # Record the initial value of the index-cache directory.
  22 clean_restart
  23 set index_cache_directory ""
  24 gdb_test_multiple "show index-cache directory" "" {
  25     -re -wrap "The directory of the index cache is \"(.*)\"\\." {
  26         set index_cache_directory $expect_out(1,string)
  27         set index_cache_directory [string_to_regexp $index_cache_directory]
  28         pass $gdb_test_name
  29     }
  30 }
  31
  32 foreach_with_prefix env_var_name $all_env_vars {
  33     # Restore the original state of the environment variable.
  34     save_vars env($env_var_name) {
  35         set env($env_var_name) {}
  36         clean_restart
  37
  38         # Verify that the empty environment variable didn't affect the
  39         # index-cache directory setting, that we still see the initial value.
  40         # "HOME" is different, because if that  one is unset, GDB isn't even
  41         # able to compute the default location.  In that case, we expect it to
  42         # be empty.
  43         if { $env_var_name == "HOME" } {
  44             gdb_test "show index-cache directory" \
  45                 "The directory of the index cache is \"\"\\."
  46         } else {
  47             gdb_test "show index-cache directory" \
  48                 "The directory of the index cache is \"$index_cache_directory\"\\."
  49         }
  50     }
  51 }
  52
  53 # Try the same, but with all the env vars set to an empty value at the same
  54 # time.
  55 with_test_prefix "all env vars" {
  56     set save_vars_arg {}
  57     foreach env_var_name $all_env_vars {
  58         lappend save_vars_arg env($env_var_name)
  59     }
  60
  61     # Restore the original state of all the environment variables.
  62     save_vars $save_vars_arg {
  63         foreach env_var_name $all_env_vars {
  64             set env($env_var_name) {}
  65         }
  66
  67         clean_restart
  68
  69         gdb_test "show index-cache directory" \
  70             "The directory of the index cache is \"\"\\."
  71     }
  72 }