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

   1 # Copyright 2015-2021 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 # This file is part of the gdb testsuite.
  17
  18 # Test the setting of "history size" via $HOME/.gdbinit
  19
  20 # This test depends on being able to set $HOME and $GDBHISTSIZE.
  21 # We cannot expect remote hosts to see environment variables set on the
  22 # local machine.
  23
  24 # Do not run if gdb debug is enabled - it interferes with the command history.
  25 if [gdb_debug_enabled] {
  26     untested "debug is enabled"
  27     return 0
  28 }
  29
  30 if { [is_remote host] } {
  31     unsupported "can't set environment variables on remote host"
  32     return -1
  33 }
  34
  35 # Check that the history size is properly set to SIZE when reading the .gdbinit
  36 # file located in HOME with the environment variable GDBHISTSIZE optionally
  37 # set to GDBHISTSIZE_VAL.
  38
  39 proc test_gdbinit_history_setting { home size { gdbhistsize_val "-" } } {
  40     global env
  41     global INTERNAL_GDBFLAGS
  42     global srcdir
  43     global subdir
  44
  45     save_vars { INTERNAL_GDBFLAGS env(GDBHISTFILE) env(GDBHISTSIZE) env(HOME) } {
  46         set env(HOME) "$srcdir/$subdir/$home"
  47
  48         # These environment variables take precedence over whatever
  49         # history size is set in .gdbinit.  Make sure the former is not
  50         # set.
  51         unset -nocomplain env(GDBHISTFILE)
  52         unset -nocomplain env(GDBHISTSIZE)
  53
  54         if { $gdbhistsize_val != "-" } {
  55             set env(GDBHISTSIZE) $gdbhistsize_val
  56         }
  57
  58         set INTERNAL_GDBFLAGS [string map {"-nx" ""} $INTERNAL_GDBFLAGS]
  59
  60         set prefix "home=$home"
  61         if { $gdbhistsize_val != "-" } {
  62             append prefix " gdbhistsize=$gdbhistsize_val"
  63         }
  64
  65         with_test_prefix $prefix {
  66             gdb_exit
  67             gdb_start
  68
  69             gdb_test "show history size" "The size of the command history is $size."
  70
  71             if { $size == "0" } {
  72                 gdb_test_no_output "show commands"
  73             } elseif { $size != "1" } {
  74                 gdb_test "show commands" "    .  show history size\r\n    .  show commands"
  75             }
  76         }
  77     }
  78 }
  79
  80 # Check that the history file does not get truncated to zero when a gdbinit
  81 # file sets the history size to unlimited.
  82
  83 proc test_no_truncation_of_unlimited_history_file { } {
  84     global env
  85     global INTERNAL_GDBFLAGS
  86
  87     save_vars { INTERNAL_GDBFLAGS env(GDBHISTFILE) env(GDBHISTSIZE) } {
  88         # These environment variables take precedence over whatever
  89         # history size is set in .gdbinit.  Make sure the former is not
  90         # set.
  91         unset -nocomplain env(GDBHISTFILE)
  92         unset -nocomplain env(GDBHISTSIZE)
  93
  94         set temp_gdbinit [standard_output_file "gdbinit-history.gdbinit"]
  95         set temp_histfile [standard_output_file "gdbinit-history.gdb_history"]
  96         file delete $temp_gdbinit
  97         file delete $temp_histfile
  98
  99         set fd [open $temp_gdbinit "w"]
 100         puts $fd "set history size unlimited\n"
 101         puts $fd "set history filename $temp_histfile\n"
 102         puts $fd "set history save\n"
 103         close $fd
 104
 105         append INTERNAL_GDBFLAGS " -x $temp_gdbinit"
 106
 107         # We have to start then exit GDB twice: the first time to test the creation
 108         # of the initial history file, and the second time to test appending to it.
 109         # In either case the initial "print 1" command should persist through the
 110         # history file.
 111         with_test_prefix "truncation" {
 112             gdb_exit
 113             gdb_start
 114             gdb_test "print 1"
 115
 116             with_test_prefix "creating" {
 117                 gdb_exit
 118                 gdb_start
 119                 gdb_test "server show commands" "    .  print 1.*"
 120             }
 121
 122             with_test_prefix "appending" {
 123                 gdb_exit
 124                 gdb_start
 125                 gdb_test "server show commands" "    .  print 1.*"
 126             }
 127         }
 128     }
 129 }
 130
 131 # Check that the current command history matches HIST, which is a list
 132 # of commands, oldest fist.
 133 proc check_history { hist } {
 134
 135     # The show commands we issue here always appears last in the
 136     # commands list.
 137     lappend hist "show commands"
 138
 139     # Number all of the entries in the HIST list and convert the list
 140     # into a pattern to match against GDB.
 141     set hist_lines [list]
 142     set idx 1
 143     foreach h $hist {
 144         lappend hist_lines "    $idx  $h"
 145         incr idx
 146     }
 147     if { [llength $hist_lines] == 1 } {
 148         set pattern [lindex $hist_lines 0]
 149     } else {
 150         set pattern [eval multi_line $hist_lines]
 151     }
 152
 153     # Check the history.
 154     gdb_test "show commands" "$pattern.*"
 155 }
 156
 157 # Run 'show history filename' and check the output contains the
 158 # filename matching PATTERN, unless, PATTERN is the empty string, in
 159 # which case match a different output that GDB will give if the
 160 # history filename is the empty string.
 161 #
 162 # TESTNAME is the name for the test, which defaults to the command run
 163 # in the test.
 164 proc check_history_filename { pattern {testname ""} } {
 165
 166     set cmd "show history filename"
 167     if { $testname == "" } {
 168         set testname $cmd
 169     }
 170
 171     if { $pattern == "" } {
 172         gdb_test $cmd \
 173             "There is no filename currently set for recording the command history in." \
 174             $testname
 175     } else {
 176         gdb_test $cmd \
 177             "The filename in which to record the command history is \"$pattern\"\." \
 178             $testname
 179     }
 180 }
 181
 182 # Tests for how GDB handles setting the history filename to the empty
 183 # string.
 184 proc test_empty_history_filename { } {
 185     global env
 186     global gdb_prompt
 187
 188     set common_history [list "set height 0" "set width 0"]
 189
 190     set test_dir [standard_output_file history_test]
 191     remote_exec host "mkdir -p $test_dir"
 192     foreach entry { { ".gdb_history" "xxxxx" } \
 193                         { "_gdb_history" "xxxxx" } \
 194                         { "alt_history" "yyyyy" } } {
 195         set fn [lindex $entry 0]
 196         set content [lindex $entry 1]
 197         set fd [open [standard_output_file "$test_dir/$fn"] w]
 198         puts $fd "$content"
 199         close $fd
 200     }
 201
 202     with_cwd "$test_dir" {
 203         with_test_prefix "load default history file" {
 204             # Start GDB and see that the history file was loaded
 205             # correctly.
 206             gdb_exit
 207             gdb_start
 208             check_history [concat "xxxxx" $common_history]
 209             check_history_filename ".*/.gdb_history"
 210         }
 211
 212         with_test_prefix "load GDBHISTFILE history file" {
 213             # Now restart GDB with GDBHISTFILE set to see that the
 214             # "other" history file is loaded.
 215             save_vars { env(GDBHISTFILE) } {
 216                 setenv GDBHISTFILE \
 217                     "$test_dir/alt_history"
 218                 gdb_exit
 219                 gdb_start
 220                 check_history [concat "yyyyy" $common_history]
 221                 check_history_filename ".*/alt_history"
 222             }
 223         }
 224
 225         with_test_prefix "GDBHISTFILE is empty" {
 226             # Now restart GDB with GDBHISTFILE set to indicate don't
 227             # load any history file, check none was loaded.
 228             save_vars { env(GDBHISTFILE) } {
 229             setenv GDBHISTFILE ""
 230                 gdb_exit
 231                 gdb_start
 232                 check_history $common_history
 233                 check_history_filename ""
 234             }
 235
 236             # Check that 'show history save' does the right thing when
 237             # the history filename is the empty string.
 238             gdb_test_no_output "set history save off" \
 239                 "ensure history save is off initially"
 240             gdb_test "show history save" \
 241                 "Saving of the history record on exit is off." \
 242                 "Check history save is off"
 243             gdb_test_no_output "set history save on"
 244             gdb_test "show history save" \
 245                 "Saving of the history is disabled due to the value of 'history filename'." \
 246                 "Check history save is off due to filename"
 247             gdb_test_no_output \
 248                 "set history filename $test_dir/alt_history" \
 249                 "set history filename at the command line"
 250             check_history_filename ".*/alt_history" \
 251                 "check filename after setting at the command line"
 252             gdb_test "show history save" \
 253                 "Saving of the history record on exit is on." \
 254                 "Check history save is on"
 255             gdb_test_no_output "set history filename"
 256             gdb_test "show history save" \
 257                 "Saving of the history is disabled due to the value of 'history filename'." \
 258                 "Check history save is off due to filename again"
 259             gdb_test_no_output "set history save off"
 260         }
 261
 262         with_test_prefix "Use -ex to clear history file" {
 263             # Now restart GDB with the command line '-ex' to indicate
 264             # no history file should be loaded.
 265             gdb_exit
 266             if {[gdb_spawn_with_cmdline_opts \
 267                      "-ex \"set history filename\""] != 0} {
 268                 fail "spawn"
 269                 return
 270             }
 271             set test "initial prompt"
 272             gdb_test_multiple "" $test {
 273                 -re ".*$gdb_prompt $" {
 274                     pass "$test"
 275                 }
 276             }
 277             check_history [list]
 278             check_history_filename ""
 279         }
 280     }
 281 }
 282
 283 test_gdbinit_history_setting "gdbinit-history/unlimited" "unlimited"
 284 test_gdbinit_history_setting "gdbinit-history/zero" "0"
 285
 286 test_no_truncation_of_unlimited_history_file
 287
 288 # A valid GDBHISTSIZE value overrides the setting inside the .gdbinit file; an
 289 # invalid GDBHISTSIZE value is ignored, falling back on the setting inside the
 290 # .gdbinit file.
 291 test_gdbinit_history_setting "gdbinit-history/unlimited" "1000" "1000"
 292 test_gdbinit_history_setting "gdbinit-history/unlimited" "unlimited" "foo"
 293
 294 # Check handling of empty history filename.
 295 test_empty_history_filename