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/* Self tests for packed for GDB, the GNU debugger.
Copyright (C) 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/packed.h"
#include <atomic>
namespace selftests {
namespace packed_tests {
gdb_static_assert (sizeof (packed<unsigned int, 1>) == 1);
gdb_static_assert (sizeof (packed<unsigned int, 2>) == 2);
gdb_static_assert (sizeof (packed<unsigned int, 3>) == 3);
gdb_static_assert (sizeof (packed<unsigned int, 4>) == 4);
gdb_static_assert (alignof (packed<unsigned int, 1>) == 1);
gdb_static_assert (alignof (packed<unsigned int, 2>) == 1);
gdb_static_assert (alignof (packed<unsigned int, 3>) == 1);
gdb_static_assert (alignof (packed<unsigned int, 4>) == 1);
/* Triviality checks. */
#define CHECK_TRAIT(TRAIT) \
static_assert (std::TRAIT<packed<unsigned int, 1>>::value, "")
#if HAVE_IS_TRIVIALLY_COPYABLE
CHECK_TRAIT (is_trivially_copyable);
CHECK_TRAIT (is_trivially_copy_constructible);
CHECK_TRAIT (is_trivially_move_constructible);
CHECK_TRAIT (is_trivially_copy_assignable);
CHECK_TRAIT (is_trivially_move_assignable);
#endif
#undef CHECK_TRAIT
/* Entry point. */
static void
run_tests ()
{
typedef packed<unsigned int, 2> packed_2;
packed_2 p1;
packed_2 p2 (0x0102);
p1 = 0x0102;
SELF_CHECK (p1 == p1);
SELF_CHECK (p1 == p2);
SELF_CHECK (p1 == 0x0102);
SELF_CHECK (0x0102 == p1);
SELF_CHECK (p1 != 0);
SELF_CHECK (0 != p1);
SELF_CHECK (p1 != 0x0103);
SELF_CHECK (0x0103 != p1);
SELF_CHECK (p1 != 0x01020102);
SELF_CHECK (0x01020102 != p1);
SELF_CHECK (p1 != 0x01020000);
SELF_CHECK (0x01020000 != p1);
/* Check truncation. */
p1 = 0x030102;
SELF_CHECK (p1 == 0x0102);
SELF_CHECK (p1 != 0x030102);
/* Check that the custom std::atomic/packed/T relational operators
work as intended. No need for fully comprehensive tests, as all
operators are defined in the same way, via a macro. We just want
to make sure that we can (non-atomically) compare atomic-wrapped
packed, with packed, and with the packed underlying type. */
std::atomic<packed<unsigned int, 2>> atomic_packed_2 (0x0102);
SELF_CHECK (atomic_packed_2 == atomic_packed_2);
SELF_CHECK (atomic_packed_2 == p1);
SELF_CHECK (p1 == atomic_packed_2);
SELF_CHECK (atomic_packed_2 == 0x0102u);
SELF_CHECK (0x0102u == atomic_packed_2);
SELF_CHECK (atomic_packed_2 >= 0x0102u);
SELF_CHECK (atomic_packed_2 <= 0x0102u);
SELF_CHECK (atomic_packed_2 > 0u);
SELF_CHECK (atomic_packed_2 < 0x0103u);
SELF_CHECK (atomic_packed_2 >= 0u);
SELF_CHECK (atomic_packed_2 <= 0x0102u);
SELF_CHECK (!(atomic_packed_2 > 0x0102u));
SELF_CHECK (!(atomic_packed_2 < 0x0102u));
/* Check std::atomic<packed> truncation behaves the same as without
std::atomic. */
atomic_packed_2 = 0x030102;
SELF_CHECK (atomic_packed_2 == 0x0102u);
SELF_CHECK (atomic_packed_2 != 0x030102u);
}
} /* namespace packed_tests */
} /* namespace selftests */
void _initialize_packed_selftests ();
void
_initialize_packed_selftests ()
{
selftests::register_test ("packed", selftests::packed_tests::run_tests);
}
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