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signals-state-child.exp revision 1.1.1.1.4.1 
      1 # Copyright 2016-2017 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 
     30 standard_testfile
     31 
     32 if {![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 
     42 remote_file host delete $gdb_txt
     43 remote_file host delete $standalone_txt
     44 remote_file target delete $gdb_txt
     45 remote_file target delete $standalone_txt
     46 
     47 set options [list debug "additional_flags=-DOUTPUT_TXT=\"$gdb_txt\""]
     48 if {[build_executable $testfile.exp $testfile $srcfile $options]} {
     49     untested "failed to compile"
     50     return -1
     51 }
     52 
     53 set options [list debug "additional_flags=-DOUTPUT_TXT=\"$standalone_txt\""]
     54 if {[build_executable $testfile.exp $testfile-standalone $srcfile $options]} {
     55     untested "failed to compile"
     56     return -1
     57 }
     58 
     59 # Run the program directly, and dump its initial signal actions and
     60 # mask in "standalone.txt".
     61 
     62 # Use remote_spawn instead of remote_exec, like how we spawn gdb.
     63 # This is in order to take the same code code paths in dejagnu
     64 # compared to when running the program through gdb.  E.g., because
     65 # local_exec uses -ignore SIGHUP, while remote_spawn does not, if we
     66 # used remote_exec, the test program would start with SIGHUP ignored
     67 # when run standalone, but not when run through gdb.
     68 set res [remote_spawn target "$binfile-standalone"]
     69 if { $res < 0 || $res == "" } {
     70     untested "spawning $binfile-standalone failed"
     71     return 1
     72 } else {
     73     pass "collect standalone signals state"
     74 }
     75 remote_close target
     76 
     77 # Now run the program through gdb, and dump its initial signal actions
     78 # and mask in "gdb.txt".
     79 
     80 clean_restart $binfile
     81 
     82 if { ! [ runto_main ] } then {
     83     untested "failed to compile"
     84     return -1
     85 }
     86 
     87 gdb_continue_to_end "collect signals state under gdb"
     88 
     89 if {!$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.
     96 gdb_test "shell diff -s $standalone_txt $gdb_txt" \
     97     "Files .* are identical.*" \
     98     "signals states are identical"
     99