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

   1 # Copyright 2018-2023 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 require supports_reverse
  17
  18 standard_testfile
  19
  20 set cflags {}
  21 lappend cflags debug
  22 lappend cflags additional_flags=-mindirect-branch=thunk
  23 lappend cflags additional_flags=-mfunction-return=thunk
  24
  25 set fcf_protection_none additional_flags=-fcf-protection=none
  26 if { [gdb_can_simple_compile fcf-protection-none {int main () { return 0; }} \
  27           executable $fcf_protection_none] } {
  28     lappend cflags $fcf_protection_none
  29 }
  30
  31 if { [prepare_for_testing "failed to prepare" $testfile $srcfile $cflags] } {
  32     return -1
  33 }
  34
  35 if { ![runto_main] } {
  36     return -1
  37 }
  38
  39 # Do repeated stepping COMMANDs in order to reach TARGET from CURRENT
  40 #
  41 #  COMMAND is a stepping command
  42 #  CURRENT is a string matching the current location
  43 #  TARGET  is a string matching the target location
  44 #  TEST    is the test name
  45 #
  46 # The function issues repeated COMMANDs as long as the location matches
  47 # CURRENT up to a maximum of 100 steps.
  48 #
  49 # TEST passes if the resulting location matches TARGET and fails
  50 # otherwise.
  51 #
  52 proc step_until { command current target test } {
  53     global gdb_prompt
  54
  55     set count 0
  56     gdb_test_multiple "$command" "$test" {
  57         -re "$current.*$gdb_prompt $" {
  58             incr count
  59             if { $count < 100 } {
  60                 send_gdb "$command\n"
  61                 exp_continue
  62             } else {
  63                 fail "$test"
  64             }
  65         }
  66         -re "$target.*$gdb_prompt $" {
  67             pass "$test"
  68         }
  69     }
  70 }
  71
  72 gdb_test_no_output "record"
  73 gdb_test "next" ".*" "record trace"
  74
  75 # Normal stepping steps through all thunks.
  76 gdb_test "reverse-step" "apply\.3.*" "reverse-step into apply"
  77 gdb_test "reverse-step" "inc\.3.*" "reverse-step into inc"
  78 gdb_test "reverse-step" "inc\.2.*" "reverse-step inside inc"
  79 gdb_test "reverse-step" "apply\.2.*" \
  80     "reverse-step through call thunk into apply, first time"
  81 gdb_test "reverse-step" "main\.2.*" "reverse-step into main"
  82 gdb_test "step" "apply\.2.*" "step into apply"
  83 gdb_test "step" "inc\.2.*" "step through call thunk into inc"
  84 gdb_test "reverse-step" "apply\.2.*" \
  85     "reverse-step through call thunk into apply, second time"
  86 gdb_test "next" "apply\.3.*" "step through thunks and over inc"
  87 gdb_test "reverse-next" "apply\.2.*" \
  88     "reverse-step through thunks and over inc"
  89
  90 # We can use instruction stepping to step into thunks.
  91 step_until "stepi" "apply\.2" "indirect_thunk" "stepi into call thunk"
  92 step_until "stepi" "indirect_thunk" "inc" \
  93     "stepi out of call thunk into inc"
  94 set alphanum_re "\[a-zA-Z0-9\]"
  95 set pic_thunk_re  "__$alphanum_re*\\.get_pc_thunk\\.$alphanum_re* \\(\\)"
  96 step_until "stepi" "(inc|$pic_thunk_re)" "return_thunk" "stepi into return thunk"
  97 step_until "stepi" "return_thunk" "apply" \
  98     "stepi out of return thunk back into apply"
  99
 100 step_until "reverse-stepi" "apply" "return_thunk" \
 101     "reverse-stepi into return thunk"
 102 step_until "reverse-stepi" "return_thunk" "inc" \
 103     "reverse-stepi out of return thunk into inc"
 104 step_until "reverse-stepi" "(inc|$pic_thunk_re)" "indirect_thunk" \
 105     "reverse-stepi into call thunk"
 106 step_until "reverse-stepi" "indirect_thunk" "apply" \
 107     "reverse-stepi out of call thunk into apply"