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

   1 # Copyright 2018-2019 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 if { ![supports_reverse] } {
  17     untested "target does not support record"
  18     return -1
  19 }
  20
  21 standard_testfile
  22
  23 set cflags "-mindirect-branch=thunk -mfunction-return=thunk"
  24 if { [prepare_for_testing "failed to prepare" $testfile $srcfile \
  25         [list debug "additional_flags=$cflags"]] } {
  26     return -1
  27 }
  28
  29 if { ![runto_main] } {
  30     untested "failed to run to main"
  31     return -1
  32 }
  33
  34 # Do repeated stepping COMMANDs in order to reach TARGET from CURRENT
  35 #
  36 #  COMMAND is a stepping command
  37 #  CURRENT is a string matching the current location
  38 #  TARGET  is a string matching the target location
  39 #  TEST    is the test name
  40 #
  41 # The function issues repeated COMMANDs as long as the location matches
  42 # CURRENT up to a maximum of 100 steps.
  43 #
  44 # TEST passes if the resulting location matches TARGET and fails
  45 # otherwise.
  46 #
  47 proc step_until { command current target test } {
  48     global gdb_prompt
  49
  50     set count 0
  51     gdb_test_multiple "$command" "$test" {
  52         -re "$current.*$gdb_prompt $" {
  53             incr count
  54             if { $count < 100 } {
  55                 send_gdb "$command\n"
  56                 exp_continue
  57             } else {
  58                 fail "$test"
  59             }
  60         }
  61         -re "$target.*$gdb_prompt $" {
  62             pass "$test"
  63         }
  64     }
  65 }
  66
  67 gdb_test_no_output "record"
  68 gdb_test "next" ".*" "record trace"
  69
  70 # Normal stepping steps through all thunks.
  71 gdb_test "reverse-step" "apply\.3.*" "reverse-step into apply"
  72 gdb_test "reverse-step" "inc\.3.*" "reverse-step into inc"
  73 gdb_test "reverse-step" "inc\.2.*" "reverse-step inside inc"
  74 gdb_test "reverse-step" "apply\.2.*" \
  75     "reverse-step through call thunk into apply"
  76 gdb_test "reverse-step" "main\.2.*" "reverse-step into main"
  77 gdb_test "step" "apply\.2.*" "step into apply"
  78 gdb_test "step" "inc\.2.*" "step through call thunk into inc"
  79 gdb_test "reverse-step" "apply\.2.*" \
  80     "reverse-step through call thunk into apply"
  81 gdb_test "next" "apply\.3.*" "step through thunks and over inc"
  82 gdb_test "reverse-next" "apply\.2.*" \
  83     "reverse-step through thunks and over inc"
  84
  85 # We can use instruction stepping to step into thunks.
  86 step_until "stepi" "apply\.2" "indirect_thunk" "stepi into call thunk"
  87 step_until "stepi" "indirect_thunk" "inc" \
  88     "stepi out of call thunk into inc"
  89 step_until "stepi" "inc" "return_thunk" "stepi into return thunk"
  90 step_until "stepi" "return_thunk" "apply" \
  91     "stepi out of return thunk back into apply"
  92
  93 step_until "reverse-stepi" "apply" "return_thunk" \
  94     "reverse-stepi into return thunk"
  95 step_until "reverse-stepi" "return_thunk" "inc" \
  96     "reverse-stepi out of return thunk into inc"
  97 step_until "reverse-stepi" "inc" "indirect_thunk" \
  98     "reverse-stepi into call thunk"
  99 step_until "reverse-stepi" "indirect_thunk" "apply" \
 100     "reverse-stepi out of call thunk into apply"