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

   1 # This testcase is part of GDB, the GNU debugger.
   2 #
   3 # Copyright 2019-2024 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 require allow_gdbserver_tests allow_python_tests
  27
  28 if {[build_executable "failed to prepare" ${testfile} \
  29          ${srcfile}] == -1} {
  30     return -1
  31 }
  32
  33 set target_binfile [gdb_remote_download target $binfile]
  34 set host_binfile [gdb_remote_download host $binfile]
  35
  36 # Start gdbserver.
  37 set res [gdbserver_spawn "${target_binfile}"]
  38 set gdbserver_protocol [lindex $res 0]
  39 set gdbserver_gdbport [lindex $res 1]
  40 set gdbserver_pid [exp_pid -i $server_spawn_id]
  41
  42 set break_linenr [gdb_get_line_number "@@XX@@ Inferior Starting @@XX@@"]
  43
  44 # Generate a python script we will later source.
  45 set file1 [standard_output_file file1.py]
  46 set fd [open "$file1" w]
  47 puts $fd \
  48 "import gdb
  49
  50 def do_gdb_stuff ():
  51     gdb.execute ('file $host_binfile')
  52     gdb.execute ('target $gdbserver_protocol $gdbserver_gdbport')
  53     gdb.execute ('break $srcfile:$break_linenr')
  54     gdb.execute ('continue')
  55     gdb.execute ('p server_pid')
  56     gdb.execute ('continue')
  57
  58 do_gdb_stuff()"
  59 close $fd
  60
  61 set host_file1 [gdb_remote_download host $file1]
  62
  63 # Now start GDB, sourcing the python command file we generated above.
  64 # Set the height and width so we don't end up at a paging prompt.
  65 if {[gdb_spawn_with_cmdline_opts \
  66          "-quiet -iex \"set height 0\" -iex \"set width 0\" -ex \"source $host_file1\""] != 0} {
  67     fail "spawn"
  68     return
  69 }
  70
  71 # Get the gdbserver PID.
  72 set gdbserver_pid 0
  73
  74 # Wait for the inferior to start up.
  75 with_spawn_id $server_spawn_id {
  76     gdb_test_multiple "" "get gdbserver PID" {
  77         -re " = ($decimal)\r\n" {
  78             set gdbserver_pid $expect_out(1,string)
  79             pass $gdb_test_name
  80         }
  81     }
  82
  83     if { $gdbserver_pid == 0 } {
  84         return
  85     }
  86
  87     gdb_test_multiple "" "ensure inferior is running" {
  88         -re "@@XX@@ Inferior Starting @@XX@@" {
  89             pass $gdb_test_name
  90         }
  91         timeout {
  92             fail $gdb_test_name
  93         }
  94     }
  95 }
  96
  97 # Now kill the gdbserver.
  98 remote_exec target "kill -9 $gdbserver_pid"
  99
 100 # Wait for GDB to return to a prompt.
 101 gdb_test_multiple "" "landed at prompt after gdbserver dies" {
 102     -re "$gdb_prompt $" {
 103         pass $gdb_test_name
 104     }
 105     timeout {
 106         fail "$gdb_test_name (timeout)"
 107     }
 108 }
 109
 110 # Run a simple command to ensure we can interact with GDB.
 111 gdb_test "echo hello\\n" "hello" "can we interact with gdb"