gdb/testsuite/gdb.server/extended-remote-restart.exp

   1 # Copyright 2018-2020 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 test is about restarting execution of a forked application when
  17 # using gdb extended remote target.
  18 #
  19 # There are two issues that the test tries to expose in GDB:
  20 #
  21 # 1. GDB would throw an assertion upon reconnecting to a remote target
  22 # if there was more than one inferior already active in GDB, and
  23 #
  24 # 2. GDB would not prune transient inferiors from the inferior list
  25 # when reconnecting to a remote target.  So, for example, an inferior
  26 # created by GDB to track the child of a fork would usually be removed
  27 # from the inferior list once the child exited.  However, reconnecting
  28 # to a remote target would result in the child inferior remaining in
  29 # the inferior list.
  30
  31 # This test is only for extended remote targets.
  32 if {[target_info gdb_protocol] != "extended-remote"} {
  33     continue
  34 }
  35
  36 # This test also makes use of 'detach-on-fork' which is not supported
  37 # on all platforms.
  38 if { ![istarget "*-*-linux*"] && ![istarget "*-*-openbsd*"] } then {
  39     continue
  40 }
  41
  42 # And we need to be able to reconnect to gdbserver.
  43 set gdbserver_reconnect_p 1
  44 if { [info proc gdb_reconnect] == "" } {
  45     return 0
  46 }
  47
  48 standard_testfile
  49
  50 if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
  51     return -1
  52 }
  53
  54 # Core of the test.  DO_KILL_P controls whether we kill one of the
  55 # inferiors before reconnecting.  And FOLLOW_CHILD_P controls whether
  56 # we follow the child or the parent at the fork.
  57 proc test_reload { do_kill_p follow_child_p } {
  58     global decimal
  59     global binfile
  60
  61     clean_restart ${binfile}
  62
  63     if ![runto_main] then {
  64         fail "can't run to main"
  65         return 0
  66     }
  67
  68     # Set detach-on-fork off
  69     gdb_test_no_output "set detach-on-fork off"
  70
  71     set live_inf_ptn "process $decimal"
  72     set dead_inf_ptn "<null>"
  73
  74     if ${follow_child_p} {
  75         gdb_test_no_output "set follow-fork child"
  76         set parent_prefix " "
  77         set child_prefix "\\*"
  78         set parent_inf_after_kill_ptn ${live_inf_ptn}
  79         set child_inf_after_kill_ptn ${dead_inf_ptn}
  80     } else {
  81         gdb_test_no_output "set follow-fork parent"
  82         set parent_prefix "\\*"
  83         set child_prefix " "
  84         set parent_inf_after_kill_ptn ${dead_inf_ptn}
  85         set child_inf_after_kill_ptn ${live_inf_ptn}
  86     }
  87
  88     gdb_breakpoint "breakpt"
  89     gdb_continue_to_breakpoint "breakpt"
  90
  91     # Check we have the expected inferiors.
  92     gdb_test "info inferiors" \
  93         [multi_line \
  94              "  Num  Description       Executable.*" \
  95              "${parent_prefix} 1 +${live_inf_ptn} \[^\r\n\]+" \
  96              "${child_prefix} 2 +${live_inf_ptn} \[^\r\n\]+" ] \
  97         "Check inferiors at breakpoint"
  98
  99     if { $do_kill_p } {
 100         # (Optional) Kill one of the inferiors.
 101         gdb_test "kill" \
 102             "" \
 103             "Kill inferior" \
 104             "Kill the program being debugged.*y or n. $" \
 105             "y"
 106
 107         # Check the first inferior really did die.
 108         gdb_test "info inferiors" \
 109             [multi_line \
 110                  "  Num  Description       Executable.*" \
 111                  "${parent_prefix} 1 +${parent_inf_after_kill_ptn} \[^\r\n\]+" \
 112                  "${child_prefix} 2 +${child_inf_after_kill_ptn} \[^\r\n\]+" ] \
 113             "Check inferior was killed"
 114     }
 115
 116     # Disconnect, and reconnect to the target.
 117     gdb_test "disconnect" ".*"
 118
 119     if { [gdb_reconnect] == 0 } {
 120         pass "reconnect after fork"
 121     } else {
 122         fail "reconnect after fork"
 123     }
 124 }
 125
 126 # Run all combinations of the test.
 127 foreach do_kill_p [list 1 0] {
 128     foreach follow_child_p [list 1 0] {
 129         with_test_prefix \
 130             "kill: ${do_kill_p}, follow-child ${follow_child_p}" {
 131                 test_reload ${do_kill_p} ${follow_child_p}
 132             }
 133     }
 134 }