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* grub-core/tests/div_test.c: New test.

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This commit is contained in:
Vladimir Serbinenko 2013-11-08 15:01:59 +01:00
parent 4db2250000
commit d061fda7e9
4 changed files with 134 additions and 0 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
2013-11-08 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/tests/div_test.c: New test.
2013-11-08 Vladimir Testov <vladimir.testov@rosalab.ru>
* grub-core/gfxmenu/gui_box.c: Updated to work with area status.

5
grub-core/Makefile.core.def
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@ -1855,6 +1855,11 @@ module = {
common = tests/setjmp_test.c;
};
module = {
name = div_test;
common = tests/div_test.c;
};
module = {
name = videotest_checksum;
common = tests/videotest_checksum.c;

124
grub-core/tests/div_test.c Normal file
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@ -0,0 +1,124 @@
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB 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.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <grub/test.h>
#include <grub/dl.h>
#include <grub/misc.h>
GRUB_MOD_LICENSE ("GPLv3+");
static grub_uint64_t vectors[][2] = {
{ 0xffffffffffffffffULL, 1},
{ 1, 0xffffffffffffffffULL},
{ 0xffffffffffffffffULL, 0xffffffffffffffffULL},
{ 1, 1 },
{ 2, 1 }
};
static void
test32 (grub_uint32_t a, grub_uint32_t b)
{
grub_uint64_t q, r;
q = grub_divmod64 (a, b, &r);
grub_test_assert (r < b, "remainder is larger than dividend: 0x%llx %% 0x%llx = 0x%llx",
(long long) a, (long long) b, (long long) r);
grub_test_assert (q * b + r == a, "division doesn't satisfy base property: 0x%llx * 0x%llx + 0x%llx != 0x%llx", (long long) q, (long long) b, (long long) r,
(long long) a);
/* Overflow check. */
grub_test_assert ((q >> 32) == 0,
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
grub_test_assert ((r >> 32) == 0,
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
/* q * b + r is at most:
0xffffffff * 0xffffffff + 0xffffffff = 0xffffffff00000000
so no overflow
*/
grub_test_assert (q == (a / b),
"C compiler division failure in 0x%llx, 0x%llx", (long long) a, (long long) b);
grub_test_assert (r == (a % b),
"C compiler modulo failure in 0x%llx, 0x%llx", (long long) a, (long long) b);
}
static void
test64 (grub_uint64_t a, grub_uint64_t b)
{
grub_uint64_t q, r;
grub_uint64_t x1, x2;
q = grub_divmod64 (a, b, &r);
grub_test_assert (r < b, "remainder is larger than dividend: 0x%llx %% 0x%llx = 0x%llx",
(long long) a, (long long) b, (long long) r);
grub_test_assert (q * b + r == a, "division doesn't satisfy base property: 0x%llx * 0x%llx + 0x%llx != 0x%llx", (long long) q, (long long) b, (long long) r,
(long long) a);
/* Overflow checks. */
grub_test_assert ((q >> 32) * (b >> 32) == 0,
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
x1 = (q >> 32) * (b & 0xffffffff);
grub_test_assert (x1 < (1LL << 32),
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
x1 <<= 32;
x2 = (b >> 32) * (q & 0xffffffff);
grub_test_assert (x2 < (1LL << 32),
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
x2 <<= 32;
grub_test_assert (x1 <= ~x2,
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
x1 += x2;
x2 = (q & 0xffffffff) * (b & 0xffffffff);
grub_test_assert (x1 <= ~x2,
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
x1 += x2;
grub_test_assert (x1 <= ~r,
"division overflow in 0x%llx, 0x%llx", (long long) a, (long long) b);
x1 += r;
grub_test_assert (a == x1,
"division overflow test failure in 0x%llx, 0x%llx", (long long) a, (long long) b);
#if GRUB_TARGET_SIZEOF_VOID_P == 8
grub_test_assert (q == (a / b),
"C compiler division failure in 0x%llx, 0x%llx", (long long) a, (long long) b);
grub_test_assert (r == (a % b),
"C compiler modulo failure in 0x%llx, 0x%llx", (long long) a, (long long) b);
#endif
}
static void
div_test (void)
{
grub_uint64_t a = 404, b = 7;
grub_size_t i;
for (i = 0; i < ARRAY_SIZE (vectors); i++)
{
test64 (vectors[i][0], vectors[i][1]);
test32 (vectors[i][0], vectors[i][1]);
}
for (i = 0; i < 40000; i++)
{
a = 17 * a + 13 * b;
b = 23 * a + 29 * b;
if (b == 0)
b = 1;
if (a == 0)
a = 1;
test64 (a, b);
test32 (a, b);
}
}
/* Register example_test method as a functional test. */
GRUB_FUNCTIONAL_TEST (div_test, div_test);

1
grub-core/tests/lib/functional_test.c
View file

@ -58,6 +58,7 @@ grub_functional_all_tests (grub_extcmd_context_t ctxt __attribute__ ((unused)),
grub_dl_load ("gfxterm_menu");
grub_dl_load ("setjmp_test");
grub_dl_load ("cmdline_cat_test");
grub_dl_load ("div_test");
FOR_LIST_ELEMENTS (test, grub_test_list)
ok = !grub_test_run (test) && ok;