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# Copyright 2018-2020 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# This test is about restarting execution of a forked application when
# using gdb extended remote target.
#
# There are two issues that the test tries to expose in GDB:
#
# 1. GDB would throw an assertion upon reconnecting to a remote target
# if there was more than one inferior already active in GDB, and
#
# 2. GDB would not prune transient inferiors from the inferior list
# when reconnecting to a remote target. So, for example, an inferior
# created by GDB to track the child of a fork would usually be removed
# from the inferior list once the child exited. However, reconnecting
# to a remote target would result in the child inferior remaining in
# the inferior list.
# This test is only for extended remote targets.
if {[target_info gdb_protocol] != "extended-remote"} {
continue
}
# This test also makes use of 'detach-on-fork' which is not supported
# on all platforms.
if { ![istarget "*-*-linux*"] && ![istarget "*-*-openbsd*"] } then {
continue
}
# And we need to be able to reconnect to gdbserver.
set gdbserver_reconnect_p 1
if { [info proc gdb_reconnect] == "" } {
return 0
}
standard_testfile
if {[prepare_for_testing "failed to prepare" $testfile $srcfile debug]} {
return -1
}
# Core of the test. DO_KILL_P controls whether we kill one of the
# inferiors before reconnecting. And FOLLOW_CHILD_P controls whether
# we follow the child or the parent at the fork.
proc test_reload { do_kill_p follow_child_p } {
global decimal
global binfile
clean_restart ${binfile}
if ![runto_main] then {
fail "can't run to main"
return 0
}
# Set detach-on-fork off
gdb_test_no_output "set detach-on-fork off"
set live_inf_ptn "process $decimal"
set dead_inf_ptn "<null>"
if ${follow_child_p} {
gdb_test_no_output "set follow-fork child"
set parent_prefix " "
set child_prefix "\\*"
set parent_inf_after_kill_ptn ${live_inf_ptn}
set child_inf_after_kill_ptn ${dead_inf_ptn}
} else {
gdb_test_no_output "set follow-fork parent"
set parent_prefix "\\*"
set child_prefix " "
set parent_inf_after_kill_ptn ${dead_inf_ptn}
set child_inf_after_kill_ptn ${live_inf_ptn}
}
gdb_breakpoint "breakpt"
gdb_continue_to_breakpoint "breakpt"
# Check we have the expected inferiors.
gdb_test "info inferiors" \
[multi_line \
" Num Description Executable.*" \
"${parent_prefix} 1 +${live_inf_ptn} \[^\r\n\]+" \
"${child_prefix} 2 +${live_inf_ptn} \[^\r\n\]+" ] \
"Check inferiors at breakpoint"
if { $do_kill_p } {
# (Optional) Kill one of the inferiors.
gdb_test "kill" \
"" \
"Kill inferior" \
"Kill the program being debugged.*y or n. $" \
"y"
# Check the first inferior really did die.
gdb_test "info inferiors" \
[multi_line \
" Num Description Executable.*" \
"${parent_prefix} 1 +${parent_inf_after_kill_ptn} \[^\r\n\]+" \
"${child_prefix} 2 +${child_inf_after_kill_ptn} \[^\r\n\]+" ] \
"Check inferior was killed"
}
# Reconnect to the target.
if { [gdb_reconnect] == 0 } {
pass "reconnect after fork"
} else {
fail "reconnect after fork"
}
}
# Run all combinations of the test.
foreach do_kill_p [list 1 0] {
foreach follow_child_p [list 1 0] {
with_test_prefix \
"kill: ${do_kill_p}, follow-child ${follow_child_p}" {
test_reload ${do_kill_p} ${follow_child_p}
}
}
}
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