blob: 152e6a178d9fe2845e52b71b4a852b6eec73a0a1 [file] [log] [blame]
# Copyright 1988-2021 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
# 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 <>.
# Test that GDB saves and restores terminal settings correctly. Also check
# the output of the "info terminal" command.
if { [prepare_for_testing "failed to prepare" term term.c] } {
return -1
# Once before running the program.
gdb_test "info terminal" \
"No saved terminal information.*" \
"test info terminal pre-execution"
if ![runto break_here] then {
return 0
# Read the inferior's terminal settings, saved in the T global variable.
proc read_term_settings_from_inferior {} {
set termios(c_iflag) [get_hexadecimal_valueof "t.c_iflag" oops]
set termios(c_oflag) [get_hexadecimal_valueof "t.c_oflag" oops]
set termios(c_cflag) [get_hexadecimal_valueof "t.c_cflag" oops]
set termios(c_lflag) [get_hexadecimal_valueof "t.c_lflag" oops]
return [array get termios]
# Validate that gdb's notion of the inferior's terminal settings are consistent
# with the values read from the inferior.
proc compare_gdb_and_inferior_settings { t } {
global decimal
array set termios $t
gdb_test "info terminal" \
[multi_line "Inferior's terminal status .currently saved by GDB.:" \
"File descriptor flags = .*" \
"Process group = $decimal" \
"c_iflag = ${termios(c_iflag)}, c_oflag = ${termios(c_oflag)}," \
"c_cflag = ${termios(c_cflag)}, c_lflag = ${termios(c_lflag)}.*" ]
if {[target_info gdb_protocol] == ""} {
# Record the initial terminal settings. Verify that GDB's version of the
# inferior's terminal settings is right.
with_test_prefix "initial" {
array set termios1 [read_term_settings_from_inferior]
compare_gdb_and_inferior_settings [array get termios1]
# Continue until after the inferior removes ECHO from its terminal settings.
gdb_continue_to_breakpoint "continue until after tcsetattr"
# After the inferior has changed its terminal settings, check that GDB's
# saved version reflects the new settings correctly.
with_test_prefix "post tcsetattr" {
array set termios2 [read_term_settings_from_inferior]
compare_gdb_and_inferior_settings [array get termios2]
# Make sure that the current settings are different than the initial
# settings... otherwise this test is meaningless.
gdb_assert {${termios1(c_lflag)} != ${termios2(c_lflag)}}
# Continue again...
gdb_continue_to_breakpoint "continue again"
# ... and verify again, to validate that when resuming, GDB restored the
# inferior's terminal settings correctly.
with_test_prefix "after last resume" {
array set termios3 [read_term_settings_from_inferior]
compare_gdb_and_inferior_settings [array get termios3]
gdb_assert {${termios2(c_iflag)} == ${termios3(c_iflag)}}
gdb_assert {${termios2(c_oflag)} == ${termios3(c_oflag)}}
gdb_assert {${termios2(c_cflag)} == ${termios3(c_cflag)}}
gdb_assert {${termios2(c_lflag)} == ${termios3(c_lflag)}}
} else {
# While only native targets save terminal status, we still test
# that the command doesn't misbehave.
gdb_test "info terminal" "No saved terminal information\\." "info terminal at breakpoint"
# One last time after the program having exited.
gdb_test "info terminal" \
"No saved terminal information.*" \
"test info terminal post-execution"