gdb/testsuite/gdb.base/step-indirect-call-thunk.exp

   1 # Copyright 2018 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 standard_testfile
  17
  18 set cflags "-mindirect-branch=thunk -mfunction-return=thunk"
  19 if { [prepare_for_testing "failed to prepare" $testfile $srcfile \
  20         [list debug "additional_flags=$cflags"]] } {
  21     return -1
  22 }
  23
  24 if { ![runto_main] } {
  25     untested "failed to run to main"
  26     return -1
  27 }
  28
  29 # Do repeated instruction steps in order to reach TARGET from CURRENT
  30 #
  31 #  CURRENT is a string matching the current location
  32 #  TARGET  is a string matching the target location
  33 #  TEST    is the test name
  34 #
  35 # The function issues repeated "stepi" commands as long as the location
  36 # matches CURRENT up to a maximum of 100 steps.
  37 #
  38 # TEST passes if the resulting location matches TARGET and fails
  39 # otherwise.
  40 #
  41 proc stepi_until { current target test } {
  42     global gdb_prompt
  43
  44     set count 0
  45     gdb_test_multiple "stepi" "$test" {
  46         -re "$current.*$gdb_prompt $" {
  47             incr count
  48             if { $count < 100 } {
  49                 send_gdb "stepi\n"
  50                 exp_continue
  51             } else {
  52                 fail "$test"
  53             }
  54         }
  55         -re "$target.*$gdb_prompt $" {
  56             pass "$test"
  57         }
  58     }
  59 }
  60
  61 # Normal stepping steps through all thunks.
  62 gdb_test "step" "thrice\.2.*" "step into thrice"
  63 gdb_test "next" "thrice\.3.*" "step through thunks and over inc"
  64 gdb_test "step" "inc\.2.*" "step through call thunk into inc"
  65 gdb_test "step" "inc\.3.*" "step inside inc"
  66 gdb_test "step" "thrice\.4.*" "step through return thunk back into thrice"
  67
  68 # We can use instruction stepping to step into thunks.
  69 stepi_until "thrice" "indirect_thunk" "stepi into call thunk"
  70 stepi_until "indirect_thunk" "inc." "stepi out of call thunk into inc"
  71 stepi_until "inc" "return_thunk" "stepi into return thunk"
  72 stepi_until "return_thunk" "thrice" \
  73     "stepi out of return thunk back into thrice"