gdb/testsuite/gdb.threads/clone-attach-detach.exp

   1 # This testcase is part of GDB, the GNU debugger.
   2
   3 # Copyright 2016-2019 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 # Test attach / detach from a process that uses raw clone.  We use raw
  19 # clone as proxy for when libthread_db is not available.
  20
  21 # This only works on targets with the Linux kernel.
  22 if ![istarget *-*-linux*] {
  23     return
  24 }
  25
  26 if {![can_spawn_for_attach]} {
  27     return 0
  28 }
  29
  30 standard_testfile
  31
  32 if [prepare_for_testing "failed to prepare" $testfile $srcfile {debug}] {
  33     return -1
  34 }
  35
  36 clean_restart ${binfile}
  37
  38 set test_spawn_id [spawn_wait_for_attach $binfile]
  39 set testpid [spawn_id_get_pid $test_spawn_id]
  40
  41 # Native/gdbserver.
  42 set thread_re "(LWP $decimal|Thread )"
  43
  44 # Try attach / detach a few times, in case GDB ends up with stale
  45 # state after detaching.
  46
  47 set attempts 3
  48 for {set attempt 1} {$attempt <= $attempts} {incr attempt} {
  49     with_test_prefix "fg attach $attempt" {
  50
  51         gdb_test "attach $testpid" \
  52             "Attaching to program.*process $testpid.*" \
  53             "attach"
  54
  55         gdb_test "info threads" \
  56             "1.*${thread_re}.*\r\n.*2.*${thread_re}.*" \
  57             "info threads shows two LWPs"
  58
  59         gdb_test "detach" "Detaching from .*, process $testpid\r\n\\\[Inferior $decimal \\(.*\\) detached\\\]"
  60     }
  61 }
  62
  63 # Same, but use async/background attach.
  64
  65 # If debugging with target remote, check whether the all-stop variant
  66 # of the RSP is being used.  If so, we can't run the background tests.
  67 if {[target_info exists gdb_protocol]
  68     && ([target_info gdb_protocol] == "remote"
  69         || [target_info gdb_protocol] == "extended-remote")} {
  70
  71     set test "maint show target-non-stop"
  72     gdb_test_multiple "maint show target-non-stop" $test {
  73         -re "(is|currently) on.*$gdb_prompt $" {
  74         }
  75         -re "(is|currently) off.*$gdb_prompt $" {
  76             unsupported "bg attach: can't issue info threads while target is running"
  77             return 0
  78         }
  79     }
  80 }
  81
  82 set attempts 3
  83 for {set attempt 1} {$attempt <= $attempts} {incr attempt} {
  84     with_test_prefix "bg attach $attempt" {
  85
  86         gdb_test "attach $testpid &" \
  87             "Attaching to program.*process $testpid.*" \
  88             "attach"
  89
  90         gdb_test "info threads" \
  91             "1.*${thread_re}.*\\(running\\)\r\n.*2.*${thread_re}.*\\(running\\)" \
  92             "info threads shows two LWPs"
  93
  94         gdb_test "detach" "Detaching from .*, process $testpid\r\n\\\[Inferior $decimal \\(.*\\) detached\\\]"
  95     }
  96 }
  97
  98 kill_wait_spawned_process $test_spawn_id