101 lines
3.4 KiB
Plaintext
101 lines
3.4 KiB
Plaintext
# Copyright 2018-2020 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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if { ![supports_reverse] } {
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untested "target does not support record"
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return -1
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}
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standard_testfile
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set cflags "-mindirect-branch=thunk -mfunction-return=thunk"
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if { [prepare_for_testing "failed to prepare" $testfile $srcfile \
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[list debug "additional_flags=$cflags"]] } {
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return -1
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}
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if { ![runto_main] } {
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untested "failed to run to main"
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return -1
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}
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# Do repeated stepping COMMANDs in order to reach TARGET from CURRENT
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#
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# COMMAND is a stepping command
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# CURRENT is a string matching the current location
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# TARGET is a string matching the target location
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# TEST is the test name
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#
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# The function issues repeated COMMANDs as long as the location matches
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# CURRENT up to a maximum of 100 steps.
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#
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# TEST passes if the resulting location matches TARGET and fails
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# otherwise.
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#
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proc step_until { command current target test } {
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global gdb_prompt
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set count 0
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gdb_test_multiple "$command" "$test" {
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-re "$current.*$gdb_prompt $" {
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incr count
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if { $count < 100 } {
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send_gdb "$command\n"
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exp_continue
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} else {
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fail "$test"
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}
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}
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-re "$target.*$gdb_prompt $" {
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pass "$test"
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}
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}
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}
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gdb_test_no_output "record"
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gdb_test "next" ".*" "record trace"
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# Normal stepping steps through all thunks.
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gdb_test "reverse-step" "apply\.3.*" "reverse-step into apply"
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gdb_test "reverse-step" "inc\.3.*" "reverse-step into inc"
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gdb_test "reverse-step" "inc\.2.*" "reverse-step inside inc"
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gdb_test "reverse-step" "apply\.2.*" \
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"reverse-step through call thunk into apply, first time"
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gdb_test "reverse-step" "main\.2.*" "reverse-step into main"
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gdb_test "step" "apply\.2.*" "step into apply"
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gdb_test "step" "inc\.2.*" "step through call thunk into inc"
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gdb_test "reverse-step" "apply\.2.*" \
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"reverse-step through call thunk into apply, second time"
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gdb_test "next" "apply\.3.*" "step through thunks and over inc"
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gdb_test "reverse-next" "apply\.2.*" \
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"reverse-step through thunks and over inc"
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# We can use instruction stepping to step into thunks.
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step_until "stepi" "apply\.2" "indirect_thunk" "stepi into call thunk"
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step_until "stepi" "indirect_thunk" "inc" \
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"stepi out of call thunk into inc"
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step_until "stepi" "inc" "return_thunk" "stepi into return thunk"
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step_until "stepi" "return_thunk" "apply" \
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"stepi out of return thunk back into apply"
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step_until "reverse-stepi" "apply" "return_thunk" \
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"reverse-stepi into return thunk"
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step_until "reverse-stepi" "return_thunk" "inc" \
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"reverse-stepi out of return thunk into inc"
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step_until "reverse-stepi" "inc" "indirect_thunk" \
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"reverse-stepi into call thunk"
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step_until "reverse-stepi" "indirect_thunk" "apply" \
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"reverse-stepi out of call thunk into apply"
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