1# Copyright 2018-2020 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 16if { ![supports_reverse] } { 17 untested "target does not support record" 18 return -1 19} 20 21standard_testfile 22 23set cflags "-mindirect-branch=thunk -mfunction-return=thunk" 24if { [prepare_for_testing "failed to prepare" $testfile $srcfile \ 25 [list debug "additional_flags=$cflags"]] } { 26 return -1 27} 28 29if { ![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# 47proc 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 67gdb_test_no_output "record" 68gdb_test "next" ".*" "record trace" 69 70# Normal stepping steps through all thunks. 71gdb_test "reverse-step" "apply\.3.*" "reverse-step into apply" 72gdb_test "reverse-step" "inc\.3.*" "reverse-step into inc" 73gdb_test "reverse-step" "inc\.2.*" "reverse-step inside inc" 74gdb_test "reverse-step" "apply\.2.*" \ 75 "reverse-step through call thunk into apply, first time" 76gdb_test "reverse-step" "main\.2.*" "reverse-step into main" 77gdb_test "step" "apply\.2.*" "step into apply" 78gdb_test "step" "inc\.2.*" "step through call thunk into inc" 79gdb_test "reverse-step" "apply\.2.*" \ 80 "reverse-step through call thunk into apply, second time" 81gdb_test "next" "apply\.3.*" "step through thunks and over inc" 82gdb_test "reverse-next" "apply\.2.*" \ 83 "reverse-step through thunks and over inc" 84 85# We can use instruction stepping to step into thunks. 86step_until "stepi" "apply\.2" "indirect_thunk" "stepi into call thunk" 87step_until "stepi" "indirect_thunk" "inc" \ 88 "stepi out of call thunk into inc" 89step_until "stepi" "inc" "return_thunk" "stepi into return thunk" 90step_until "stepi" "return_thunk" "apply" \ 91 "stepi out of return thunk back into apply" 92 93step_until "reverse-stepi" "apply" "return_thunk" \ 94 "reverse-stepi into return thunk" 95step_until "reverse-stepi" "return_thunk" "inc" \ 96 "reverse-stepi out of return thunk into inc" 97step_until "reverse-stepi" "inc" "indirect_thunk" \ 98 "reverse-stepi into call thunk" 99step_until "reverse-stepi" "indirect_thunk" "apply" \ 100 "reverse-stepi out of call thunk into apply" 101