From f5e7e95921847bd83186bfe621fc2b48c4de5477 Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Tue, 30 Oct 2018 13:11:47 +0100 Subject: stdlib/test-bz22786: Avoid spurious test failures using alias mappings 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. --- support/blob_repeat.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 support/blob_repeat.h (limited to 'support/blob_repeat.h') diff --git a/support/blob_repeat.h b/support/blob_repeat.h new file mode 100644 index 0000000000..8e9d7ff5f1 --- /dev/null +++ b/support/blob_repeat.h @@ -0,0 +1,44 @@ +/* Repeating a memory blob, with alias mapping optimization. + Copyright (C) 2018 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 + . */ + +#ifndef SUPPORT_BLOB_REPEAT_H +#define SUPPORT_BLOB_REPEAT_H + +#include +#include + +struct support_blob_repeat +{ + void *start; + size_t size; + bool use_malloc; +}; + +/* Return an allocation of COUNT elements, each of ELEMENT_SIZE bytes, + initialized with the bytes starting at ELEMENT. The memory is + writable (and thus counts towards the commit charge). In case of + on error, all members of the return struct are zero-initialized, + and errno is set accordingly. */ +struct support_blob_repeat support_blob_repeat_allocate (const void *element, + size_t element_size, + size_t count); + +/* Deallocate the blob created by support_blob_repeat_allocate. */ +void support_blob_repeat_free (struct support_blob_repeat *); + +#endif /* SUPPORT_BLOB_REPEAT_H */ -- cgit 1.4.1