gdb/testsuite/gdb.server/server-kill-python.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2 #
   3 # Copyright 2019-2022 Free Software Foundation, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 3 of the License, or
   8 # (at your option) any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 # This test script exposes a bug where, if gdbserver dies while GDB is
  19 # sourcing a python command like 'gdb.execute ("continue")', then GDB
  20 # will deadlock.
  21
  22 load_lib gdbserver-support.exp
  23
  24 standard_testfile multi-ui-errors.c
  25
  26 if {[skip_gdbserver_tests]} {
  27     return 0
  28 }
  29
  30 if {[build_executable "failed to prepare" ${testfile} \
  31          ${srcfile}] == -1} {
  32     return -1
  33 }
  34
  35 # Start gdbserver.
  36 set res [gdbserver_spawn "${binfile}"]
  37 set gdbserver_protocol [lindex $res 0]
  38 set gdbserver_gdbport [lindex $res 1]
  39 set gdbserver_pid [exp_pid -i $server_spawn_id]
  40
  41 # Generate a python script we will later source.
  42 set file1 [standard_output_file file1.py]
  43 set fd [open "$file1" w]
  44 puts $fd \
  45 "import gdb
  46
  47 def do_gdb_stuff ():
  48     gdb.execute ('target $gdbserver_protocol $gdbserver_gdbport')
  49     gdb.execute ('continue')
  50
  51 do_gdb_stuff()"
  52 close $fd
  53
  54 # Now start GDB, sourcing the python command file we generated above.
  55 # Set the height and width so we don't end up at a paging prompt.
  56 if {[gdb_spawn_with_cmdline_opts \
  57          "-quiet -iex \"set height 0\" -iex \"set width 0\" -ex \"source $file1\""] != 0} {
  58     fail "spawn"
  59     return
  60 }
  61
  62 # Wait for the inferior to start up.
  63 with_spawn_id $server_spawn_id {
  64     gdb_test_multiple "" "ensure inferior is running" {
  65         -re "@@XX@@ Inferior Starting @@XX@@" {
  66             pass $gdb_test_name
  67         }
  68         timeout {
  69             fail $gdb_test_name
  70         }
  71     }
  72 }
  73
  74 # Now kill the gdbserver.
  75 remote_exec target "kill -9 $gdbserver_pid"
  76
  77 # Wait for GDB to return to a prompt.
  78 gdb_test_multiple "" "landed at prompt after gdbserver dies" {
  79     -re "$gdb_prompt $" {
  80         pass $gdb_test_name
  81     }
  82     timeout {
  83         fail "$gdb_test_name (timeout)"
  84     }
  85 }
  86
  87 # Run a simple command to ensure we can interact with GDB.
  88 gdb_test "echo hello\\n" "hello" "can we interact with gdb"