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# Copyright 2021-2022 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/>.
# Test stepping over a breakpoint installed on an instruction that
# exits the thread.
standard_testfile .c
set syscalls_src $srcdir/lib/my-syscalls.S
if { [build_executable "failed to prepare" $testfile \
[list $srcfile $syscalls_src] {debug pthreads}] == -1 } {
return
}
# Each argument is a different testing axis, most of them obvious.
# NS_STOP_ALL is only used if testing "set non-stop on", and indicates
# whether to have GDB explicitly stop all threads before continuing to
# thread exit.
proc test {displaced-stepping non-stop target-non-stop schedlock cmd ns_stop_all} {
if {${non-stop} == "off" && $ns_stop_all} {
error "invalid arguments"
}
save_vars ::GDBFLAGS {
append ::GDBFLAGS " -ex \"maintenance set target-non-stop ${target-non-stop}\""
append ::GDBFLAGS " -ex \"set non-stop ${non-stop}\""
clean_restart $::binfile
}
gdb_test_no_output "set displaced-stepping ${displaced-stepping}"
if { ![runto_main] } {
return
}
gdb_breakpoint "my_exit_syscall"
if {$schedlock
|| (${non-stop} == "on" && $ns_stop_all)} {
gdb_test "continue" \
"Thread 2 .*hit Breakpoint $::decimal.* my_exit_syscall .*" \
"continue until syscall"
if {${non-stop} == "on"} {
# The test only spawns one thread at a time, so this just
# stops the main thread.
gdb_test_multiple "interrupt -a" "" {
-re "$::gdb_prompt " {
gdb_test_multiple "" $gdb_test_name {
-re "Thread 1 \[^\r\n\]*stopped." {
pass $gdb_test_name
}
}
}
}
}
gdb_test "thread 2" "Switching to thread 2 .*"
gdb_test_no_output "set scheduler-locking ${schedlock}"
if {$cmd == "continue"} {
gdb_test "continue" \
"No unwaited-for children left." \
"continue stops when thread exits"
} else {
gdb_test_multiple $cmd "command aborts when thread exits" {
-re "Command aborted, thread exited\\.\r\n$::gdb_prompt " {
pass $gdb_test_name
}
}
}
} else {
gdb_test_no_output "set scheduler-locking ${schedlock}"
if {$cmd != "continue"} {
set thread "<unknown>"
gdb_test_multiple "continue" "" {
-re -wrap "Thread ($::decimal) .*hit Breakpoint $::decimal.* my_exit_syscall .*" {
set thread $expect_out(1,string)
}
}
if {${non-stop}} {
gdb_test -nopass "thread $thread" "Switching to thread .*" \
"switch to event thread"
}
gdb_test_multiple $cmd "command aborts when thread exits" {
-re "Command aborted, thread exited\\.\r\n$::gdb_prompt " {
pass $gdb_test_name
}
}
} else {
for { set i 0 } { $i < 100 } { incr i } {
with_test_prefix "iter $i" {
set ok 0
set thread "<unknown>"
gdb_test_multiple "continue" "" {
-re -wrap "Thread ($::decimal) .*hit Breakpoint $::decimal.* my_exit_syscall .*" {
set thread $expect_out(1,string)
set ok 1
}
}
if {!${ok}} {
# Exit if there's a failure to avoid lengthy
# timeouts.
break
}
if {${non-stop}} {
gdb_test -nopass "thread $thread" "Switching to thread .*" \
"switch to event thread"
}
}
}
}
}
}
foreach_with_prefix displaced-stepping {off auto} {
foreach_with_prefix non-stop {off on} {
foreach_with_prefix target-non-stop {off on} {
if {${non-stop} == "on" && ${target-non-stop} == "off"} {
# Invalid combination.
continue
}
foreach_with_prefix schedlock {off on} {
foreach_with_prefix cmd {"next" "continue"} {
if {${non-stop} == "on"} {
foreach_with_prefix ns_stop_all {0 1} {
test ${displaced-stepping} ${non-stop} ${target-non-stop} \
${schedlock} ${cmd} ${ns_stop_all}
}
} else {
test ${displaced-stepping} ${non-stop} ${target-non-stop} ${schedlock} ${cmd} 0
}
}
}
}
}
}
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