1# Copyright 2016-2020 Free Software Foundation, Inc. 2 3# This program is free software; you can redistribute it and/or modify 4# it under the terms of the GNU General Public License as published by 5# the Free Software Foundation; either version 3 of the License, or 6# (at your option) any later version. 7# 8# This program is distributed in the hope that it will be useful, 9# but WITHOUT ANY WARRANTY; without even the implied warranty of 10# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11# GNU General Public License for more details. 12# 13# You should have received a copy of the GNU General Public License 14# along with this program. If not, see <http://www.gnu.org/licenses/>. 15 16# Test that gdb's (or gdbserver's) own signal handling does not 17# interfere with the signal actions (dispositions, etc.) and mask 18# their spawned children inherit. 19# 20# - If gdb inherits some signal set to SIG_IGN, so should the 21# inferior, even if gdb itself chooses not to ignore the signal. 22# 23# - If gdb inherits some signal set to SIG_DFL, so should the inferior 24# even if gdb itself ignores that signal. 25# 26# This requires special support in gdb/gdbserver because the exec 27# family of functions does not reset the signal disposition of signals 28# that are set to SIG_IGN, nor signal masks and flags. 29 30standard_testfile 31 32if {![is_remote host] && ![is_remote target]} { 33 set gdb_txt [standard_output_file gdb.txt] 34 set standalone_txt [standard_output_file standalone.txt] 35 set purely_local 1 36} else { 37 set gdb_txt gdb.txt 38 set standalone_txt standalone.txt 39 set purely_local 0 40} 41 42remote_file host delete $gdb_txt 43remote_file host delete $standalone_txt 44remote_file target delete $gdb_txt 45remote_file target delete $standalone_txt 46 47set options [list debug "additional_flags=-DOUTPUT_TXT=\"$gdb_txt\""] 48if {[build_executable $testfile.exp $testfile $srcfile $options]} { 49 untested "failed to compile" 50 return -1 51} 52 53set options [list debug "additional_flags=-DOUTPUT_TXT=\"$standalone_txt\""] 54if {[build_executable $testfile.exp $testfile-standalone $srcfile $options]} { 55 untested "failed to compile" 56 return -1 57} 58 59# Run the program directly, and dump its initial signal actions and 60# mask in "standalone.txt". 61 62# Use remote_spawn instead of remote_exec, like how we spawn gdb. 63# This is in order to take the same code code paths in dejagnu 64# compared to when running the program through gdb. E.g., because 65# local_exec uses -ignore SIGHUP, while remote_spawn does not, if we 66# used remote_exec, the test program would start with SIGHUP ignored 67# when run standalone, but not when run through gdb. 68set res [remote_spawn target "$binfile-standalone"] 69if { $res < 0 || $res == "" } { 70 untested "spawning $binfile-standalone failed" 71 return 1 72} else { 73 pass "collect standalone signals state" 74} 75remote_close target 76 77# Now run the program through gdb, and dump its initial signal actions 78# and mask in "gdb.txt". 79 80clean_restart $binfile 81 82if { ! [ runto_main ] } then { 83 untested "failed to compile" 84 return -1 85} 86 87gdb_continue_to_end "collect signals state under gdb" 88 89if {!$purely_local} { 90 # Copy file from target to host through build. 91 remote_download host [remote_upload target gdb.txt] gdb.txt 92 remote_download host [remote_upload target standalone.txt] standalone.txt 93} 94 95# Diff the .txt files. They should be identical. 96gdb_test "shell diff -s $standalone_txt $gdb_txt" \ 97 "Files .* are identical.*" \ 98 "signals states are identical" 99