gdb/testsuite/gdb.base/gdbhistsize-history.exp

   1 # Copyright 2015-2019 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 # This file is part of the gdb testsuite.
  17
  18 # Test the setting of "history size" via the GDBHISTSIZE environment variable
  19
  20
  21 # We cannot expect remote hosts to see environment variables set on the
  22 # local machine.
  23
  24 if { [is_remote host] } {
  25     unsupported "can't set environment variables on remote host"
  26     return -1
  27 }
  28
  29 # Check that the history size is properly set to SIZE when the environment
  30 # variable ENV_VAR is set to GDBHISTSIZE.
  31
  32 proc test_histsize_history_setting { histsize size { env_var "GDBHISTSIZE" } } {
  33     global env
  34
  35     save_vars { env(GDBHISTFILE) env(GDBHISTSIZE) env($env_var) } {
  36         # These environment variables take precedence over whatever
  37         # history size is set in .gdbinit.  Make sure the former is not
  38         # set.
  39         unset -nocomplain env(GDBHISTFILE)
  40         unset -nocomplain env(GDBHISTSIZE)
  41
  42         set env($env_var) $histsize
  43
  44         with_test_prefix "histsize=$histsize" {
  45             gdb_exit
  46             gdb_start
  47
  48             gdb_test "show history size" "The size of the command history is $size."
  49
  50             if { $size == "0" } {
  51                 gdb_test_no_output "show commands"
  52             } elseif { $size != "1" } {
  53                 gdb_test "show commands" \
  54                          "    .  show history size\r\n    .  show commands"
  55             }
  56         }
  57     }
  58 }
  59
  60 test_histsize_history_setting "" "unlimited"
  61 test_histsize_history_setting "0" "0"
  62 test_histsize_history_setting "20" "20"
  63 test_histsize_history_setting " 20 " "20"
  64 test_histsize_history_setting "-5" "unlimited"
  65
  66 # Test defaulting to 256 upon encountering a non-numeric GDBHISTSIZE.
  67 test_histsize_history_setting "not_an_integer" "256"
  68 test_histsize_history_setting "10zab" "256"
  69 test_histsize_history_setting "-5ab" "256"
  70
  71 # A huge number (hopefully larger than INT_MAX)
  72 test_histsize_history_setting "99999999999999999999999999999999999" "unlimited"
  73
  74 # We no longer read HISTSIZE
  75 test_histsize_history_setting "50" "256" "HISTSIZE"