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- /* Self tests for scoped_restore for GDB, the GNU debugger.
- Copyright (C) 2017-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "gdbsupport/selftest.h"
- #include "gdbsupport/scoped_restore.h"
- namespace selftests {
- namespace scoped_restore_tests {
- struct Base {};
- struct Derived : Base {};
- static int global;
- /* Check that we can return a scoped_restore from a function. Below
- we'll make sure this does the right thing. */
- static scoped_restore_tmpl<int>
- make_scoped_restore_global (int value)
- {
- return make_scoped_restore (&global, value);
- }
- static void
- run_tests ()
- {
- /* Test that single-argument make_scoped_restore restores the
- original value on scope exit. */
- {
- int integer = 0;
- {
- scoped_restore restore = make_scoped_restore (&integer);
- SELF_CHECK (integer == 0);
- integer = 1;
- }
- SELF_CHECK (integer == 0);
- }
- /* Same, with two-argument make_scoped_restore. */
- {
- int integer = 0;
- {
- scoped_restore restore = make_scoped_restore (&integer, 1);
- SELF_CHECK (integer == 1);
- }
- SELF_CHECK (integer == 0);
- }
- /* Test releasing a scoped_restore. */
- {
- int integer = 0;
- {
- scoped_restore restore = make_scoped_restore (&integer, 1);
- SELF_CHECK (integer == 1);
- restore.release ();
- }
- /* The overridden value should persist. */
- SELF_CHECK (integer == 1);
- }
- /* Test creating a scoped_restore with a value of a type convertible
- to T. */
- {
- Base *base = nullptr;
- Derived derived;
- {
- scoped_restore restore = make_scoped_restore (&base, &derived);
- SELF_CHECK (base == &derived);
- }
- SELF_CHECK (base == nullptr);
- }
- /* Test calling a function that returns a scoped restore. Makes
- sure that if the compiler emits a call to the copy ctor, that we
- still do the right thing. */
- {
- {
- SELF_CHECK (global == 0);
- scoped_restore restore = make_scoped_restore_global (1);
- SELF_CHECK (global == 1);
- }
- SELF_CHECK (global == 0);
- }
- }
- } /* namespace scoped_restore_tests */
- } /* namespace selftests */
- void _initialize_scoped_restore_selftests ();
- void
- _initialize_scoped_restore_selftests ()
- {
- selftests::register_test ("scoped_restore",
- selftests::scoped_restore_tests::run_tests);
- }
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