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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)
45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/* Repeating a memory blob, with alias mapping optimization.
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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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#ifndef SUPPORT_BLOB_REPEAT_H
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#define SUPPORT_BLOB_REPEAT_H
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#include <stdbool.h>
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#include <stddef.h>
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struct support_blob_repeat
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{
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void *start;
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size_t size;
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bool use_malloc;
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};
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/* Return an allocation of COUNT elements, each of ELEMENT_SIZE bytes,
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initialized with the bytes starting at ELEMENT. The memory is
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writable (and thus counts towards the commit charge). In case of
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on error, all members of the return struct are zero-initialized,
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and errno is set accordingly. */
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struct support_blob_repeat support_blob_repeat_allocate (const void *element,
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size_t element_size,
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size_t count);
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/* Deallocate the blob created by support_blob_repeat_allocate. */
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void support_blob_repeat_free (struct support_blob_repeat *);
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#endif /* SUPPORT_BLOB_REPEAT_H */
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