gdb/testsuite/gdb.base/valgrind-disp-step.exp

   1 # Copyright 2012-2021 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 # Step over breakpoints with displaced stepping on, against Valgrind.
  17 # We can't really use displaced stepping with Valgrind, so what this
  18 # really tests is that GDB falls back to in-line stepping
  19 # automatically instead of getting stuck or crashing.
  20
  21 load_lib valgrind.exp
  22
  23 if [is_remote target] {
  24     # The test always runs locally.
  25     return 0
  26 }
  27
  28 standard_testfile .c
  29 if {[build_executable "failed to build" $testfile $srcfile {debug}] == -1} {
  30     return -1
  31 }
  32
  33 if { [vgdb_start] == -1 } {
  34     return -1
  35 }
  36
  37 gdb_test_no_output "set displaced-stepping off"
  38 gdb_breakpoint "main" "breakpoint at main"
  39 gdb_test "continue" " stop 0 .*" "continue to main"
  40 delete_breakpoints
  41
  42 set curr_stop 0
  43 foreach displaced { "off" "on" } {
  44     with_test_prefix "displaced $displaced" {
  45
  46         gdb_test_no_output "set displaced-stepping $displaced"
  47
  48         foreach go { "once" "twice" } {
  49             with_test_prefix $go {
  50                 gdb_test "break" "Breakpoint .* at .*" "set breakpoint"
  51
  52                 # Whether we should see a warning.
  53                 set should_warn [expr {$go == "once" && $displaced == "on"}]
  54
  55                 incr curr_stop
  56
  57                 set msg "step over breakpoint"
  58                 set pattern " stop $curr_stop .*$gdb_prompt $"
  59                 gdb_test_multiple "next" $msg {
  60                     -re "warning: disabling displaced stepping.*$pattern" {
  61                         gdb_assert $should_warn $msg
  62                     }
  63                     -re "$pattern" {
  64                         gdb_assert !$should_warn $msg
  65                     }
  66                 }
  67             }
  68         }
  69     }
  70 }
  71
  72 vgdb_stop