gdb/testsuite/gdb.base/vdso-warning.exp

   1 # Copyright 2012-2020 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 on Linux, we don't warn about not finding the vDSO.  E.g.:
  17 #
  18 #   warning: Could not load shared library symbols for linux-vdso.so.1.
  19
  20 standard_testfile
  21
  22 if { [prepare_for_testing "failed to prepare" ${testfile} $srcfile] } {
  23     return -1
  24 }
  25
  26 with_test_prefix "setup" {
  27     gdb_breakpoint "main"
  28
  29     # At least some versions of Fedora/RHEL glibc have local patches that
  30     # hide the vDSO.  This lines re-exposes it.  See PR libc/13097,
  31     # comment 2.  There's no support for passing environment variables in
  32     # the remote protocol, but that's OK -- if we're testing against a
  33     # glibc that doesn't list the vDSO without this, the test should still
  34     # pass.
  35     gdb_test_no_output "set environment LD_DEBUG=unused"
  36 }
  37
  38 proc test_no_vdso {command} {
  39     global srcfile
  40     global gdb_prompt
  41
  42     set message "startup"
  43     gdb_test_multiple "$command" $message {
  44         -re "Could not load shared library symbols .*\r\n$gdb_prompt $" {
  45             fail $message
  46         }
  47         -re "main \\(\\) at .*$srcfile.*\r\n$gdb_prompt $" {
  48             pass $message
  49         }
  50     }
  51
  52     # Extra testing in case the warning changes and we miss updating
  53     # the above.
  54     set test "no vdso without symbols is listed"
  55     gdb_test_multiple "info shared" $test {
  56         -re "No\[^\r\n\]+linux-(vdso|gate).*$gdb_prompt $" {
  57             fail $test
  58         }
  59         -re "$gdb_prompt $" {
  60             pass $test
  61         }
  62     }
  63 }
  64
  65 # First, try a live process.
  66 with_test_prefix "run" {
  67     gdb_run_cmd
  68     test_no_vdso ""
  69 }
  70
  71 # Now, dump a core, and reload it.
  72 with_test_prefix "core" {
  73     set corefile [standard_output_file $testfile.core]
  74     set core_supported [gdb_gcore_cmd "$corefile" "save a corefile"]
  75     if {!$core_supported} {
  76         return -1
  77     }
  78
  79     clean_restart ${testfile}
  80
  81     test_no_vdso "core-file $corefile"
  82 }