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dcd52b94bf
On systems without enough random-access memory, stdlib/test-bz22786
will go deeply into swap and time out, even with a substantial
TIMEOUTFACTOR. This commit adds a facility to construct repeating
strings with alias mappings, so that the requirement for physical
memory, and uses it in stdlib/test-bz22786.
(cherry picked from commit f5e7e95921)
86 lines
2.8 KiB
C
86 lines
2.8 KiB
C
/* Tests for <support/blob_repeat.h>
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Copyright (C) 2018 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <support/blob_repeat.h>
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#include <support/check.h>
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static int
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do_test (void)
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{
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struct support_blob_repeat repeat
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= support_blob_repeat_allocate ("5", 1, 5);
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TEST_COMPARE_BLOB (repeat.start, repeat.size, "55555", 5);
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support_blob_repeat_free (&repeat);
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repeat = support_blob_repeat_allocate ("ABC", 3, 3);
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TEST_COMPARE_BLOB (repeat.start, repeat.size, "ABCABCABC", 9);
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support_blob_repeat_free (&repeat);
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repeat = support_blob_repeat_allocate ("abc", 4, 3);
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TEST_COMPARE_BLOB (repeat.start, repeat.size, "abc\0abc\0abc", 12);
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support_blob_repeat_free (&repeat);
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size_t gigabyte = 1U << 30;
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repeat = support_blob_repeat_allocate ("X", 1, gigabyte + 1);
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if (repeat.start == NULL)
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puts ("warning: not enough memory for 1 GiB mapping");
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else
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{
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TEST_COMPARE (repeat.size, gigabyte + 1);
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{
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unsigned char *p = repeat.start;
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for (size_t i = 0; i < gigabyte + 1; ++i)
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if (p[i] != 'X')
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FAIL_EXIT1 ("invalid byte 0x%02x at %zu", p[i], i);
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/* Check that there is no sharing across the mapping. */
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p[0] = 'Y';
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p[1U << 24] = 'Z';
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for (size_t i = 0; i < gigabyte + 1; ++i)
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if (i == 0)
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TEST_COMPARE (p[i], 'Y');
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else if (i == 1U << 24)
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TEST_COMPARE (p[i], 'Z');
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else if (p[i] != 'X')
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FAIL_EXIT1 ("invalid byte 0x%02x at %zu", p[i], i);
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}
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}
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support_blob_repeat_free (&repeat);
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repeat = support_blob_repeat_allocate ("012345678", 9, 10 * 1000 * 1000);
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if (repeat.start == NULL)
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puts ("warning: not enough memory for large mapping");
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else
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{
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unsigned char *p = repeat.start;
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for (int i = 0; i < 10 * 1000 * 1000; ++i)
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for (int j = 0; j <= 8; ++j)
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if (p[i * 9 + j] != '0' + j)
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{
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printf ("error: element %d index %d\n", i, j);
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TEST_COMPARE (p[i * 9 + j], '0' + j);
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}
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}
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support_blob_repeat_free (&repeat);
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return 0;
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}
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#include <support/test-driver.c>
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