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

   1 # Copyright 2018-2022 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     return -1
  31 }
  32
  33 # Do repeated stepping COMMANDs in order to reach TARGET from CURRENT
  34 #
  35 #  COMMAND is a stepping command
  36 #  CURRENT is a string matching the current location
  37 #  TARGET  is a string matching the target location
  38 #  TEST    is the test name
  39 #
  40 # The function issues repeated COMMANDs as long as the location matches
  41 # CURRENT up to a maximum of 100 steps.
  42 #
  43 # TEST passes if the resulting location matches TARGET and fails
  44 # otherwise.
  45 #
  46 proc step_until { command current target test } {
  47     global gdb_prompt
  48
  49     set count 0
  50     gdb_test_multiple "$command" "$test" {
  51         -re "$current.*$gdb_prompt $" {
  52             incr count
  53             if { $count < 100 } {
  54                 send_gdb "$command\n"
  55                 exp_continue
  56             } else {
  57                 fail "$test"
  58             }
  59         }
  60         -re "$target.*$gdb_prompt $" {
  61             pass "$test"
  62         }
  63     }
  64 }
  65
  66 gdb_test_no_output "record"
  67 gdb_test "next" ".*" "record trace"
  68
  69 # Normal stepping steps through all thunks.
  70 gdb_test "reverse-step" "apply\.3.*" "reverse-step into apply"
  71 gdb_test "reverse-step" "inc\.3.*" "reverse-step into inc"
  72 gdb_test "reverse-step" "inc\.2.*" "reverse-step inside inc"
  73 gdb_test "reverse-step" "apply\.2.*" \
  74     "reverse-step through call thunk into apply, first time"
  75 gdb_test "reverse-step" "main\.2.*" "reverse-step into main"
  76 gdb_test "step" "apply\.2.*" "step into apply"
  77 gdb_test "step" "inc\.2.*" "step through call thunk into inc"
  78 gdb_test "reverse-step" "apply\.2.*" \
  79     "reverse-step through call thunk into apply, second time"
  80 gdb_test "next" "apply\.3.*" "step through thunks and over inc"
  81 gdb_test "reverse-next" "apply\.2.*" \
  82     "reverse-step through thunks and over inc"
  83
  84 # We can use instruction stepping to step into thunks.
  85 step_until "stepi" "apply\.2" "indirect_thunk" "stepi into call thunk"
  86 step_until "stepi" "indirect_thunk" "inc" \
  87     "stepi out of call thunk into inc"
  88 set alphanum_re "\[a-zA-Z0-9\]"
  89 set pic_thunk_re  "__$alphanum_re*\\.get_pc_thunk\\.$alphanum_re* \\(\\)"
  90 step_until "stepi" "(inc|$pic_thunk_re)" "return_thunk" "stepi into return thunk"
  91 step_until "stepi" "return_thunk" "apply" \
  92     "stepi out of return thunk back into apply"
  93
  94 step_until "reverse-stepi" "apply" "return_thunk" \
  95     "reverse-stepi into return thunk"
  96 step_until "reverse-stepi" "return_thunk" "inc" \
  97     "reverse-stepi out of return thunk into inc"
  98 step_until "reverse-stepi" "(inc|$pic_thunk_re)" "indirect_thunk" \
  99     "reverse-stepi into call thunk"
 100 step_until "reverse-stepi" "indirect_thunk" "apply" \
 101     "reverse-stepi out of call thunk into apply"