mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 22:10:13 +00:00
105 lines
3.6 KiB
C
105 lines
3.6 KiB
C
/* Tests for <support/blob_repeat.h>
|
|
Copyright (C) 2018-2024 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library 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
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <support/blob_repeat.h>
|
|
#include <support/check.h>
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
struct support_blob_repeat repeat
|
|
= support_blob_repeat_allocate ("5", 1, 5);
|
|
TEST_COMPARE_BLOB (repeat.start, repeat.size, "55555", 5);
|
|
support_blob_repeat_free (&repeat);
|
|
|
|
repeat = support_blob_repeat_allocate ("ABC", 3, 3);
|
|
TEST_COMPARE_BLOB (repeat.start, repeat.size, "ABCABCABC", 9);
|
|
support_blob_repeat_free (&repeat);
|
|
|
|
repeat = support_blob_repeat_allocate ("abc", 4, 3);
|
|
TEST_COMPARE_BLOB (repeat.start, repeat.size, "abc\0abc\0abc", 12);
|
|
support_blob_repeat_free (&repeat);
|
|
|
|
size_t gigabyte = 1U << 30;
|
|
repeat = support_blob_repeat_allocate ("X", 1, gigabyte + 1);
|
|
if (repeat.start == NULL)
|
|
puts ("warning: not enough memory for 1 GiB mapping");
|
|
else
|
|
{
|
|
TEST_COMPARE (repeat.size, gigabyte + 1);
|
|
{
|
|
unsigned char *p = repeat.start;
|
|
for (size_t i = 0; i < gigabyte + 1; ++i)
|
|
if (p[i] != 'X')
|
|
FAIL_EXIT1 ("invalid byte 0x%02x at %zu", p[i], i);
|
|
|
|
/* Check that there is no sharing across the mapping. */
|
|
p[0] = 'Y';
|
|
p[1U << 24] = 'Z';
|
|
for (size_t i = 0; i < gigabyte + 1; ++i)
|
|
if (i == 0)
|
|
TEST_COMPARE (p[i], 'Y');
|
|
else if (i == 1U << 24)
|
|
TEST_COMPARE (p[i], 'Z');
|
|
else if (p[i] != 'X')
|
|
FAIL_EXIT1 ("invalid byte 0x%02x at %zu", p[i], i);
|
|
}
|
|
}
|
|
support_blob_repeat_free (&repeat);
|
|
|
|
for (int do_shared = 0; do_shared < 2; ++do_shared)
|
|
{
|
|
if (do_shared)
|
|
repeat = support_blob_repeat_allocate_shared ("012345678", 9,
|
|
10 * 1000 * 1000);
|
|
else
|
|
repeat = support_blob_repeat_allocate ("012345678", 9,
|
|
10 * 1000 * 1000);
|
|
if (repeat.start == NULL)
|
|
puts ("warning: not enough memory for large mapping");
|
|
else
|
|
{
|
|
unsigned char *p = repeat.start;
|
|
for (int i = 0; i < 10 * 1000 * 1000; ++i)
|
|
for (int j = 0; j <= 8; ++j)
|
|
if (p[i * 9 + j] != '0' + j)
|
|
{
|
|
printf ("error: element %d index %d\n", i, j);
|
|
TEST_COMPARE (p[i * 9 + j], '0' + j);
|
|
}
|
|
|
|
enum { total_size = 9 * 10 * 1000 * 1000 };
|
|
p[total_size - 1] = '\0';
|
|
asm ("" ::: "memory");
|
|
if (do_shared)
|
|
/* The write is repeated in multiple places earlier in the
|
|
string due to page sharing. */
|
|
TEST_VERIFY (strlen (repeat.start) < total_size - 1);
|
|
else
|
|
TEST_COMPARE (strlen (repeat.start), total_size - 1);
|
|
}
|
|
support_blob_repeat_free (&repeat);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|