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/* Copyright (C) 1991-2021 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/>. */
#if defined(SHARED) || defined(USE_MTAG)
static bool __always_fail_morecore = false;
#endif
/* Allocate INCREMENT more bytes of data space,
and return the start of data space, or NULL on errors.
If INCREMENT is negative, shrink data space. */
void *
__glibc_morecore (ptrdiff_t increment)
{
#if defined(SHARED) || defined(USE_MTAG)
if (__always_fail_morecore)
return NULL;
#endif
void *result = (void *) __sbrk (increment);
if (result == (void *) -1)
return NULL;
return result;
}
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_34)
compat_symbol (libc, __glibc_morecore, __default_morecore, GLIBC_2_0);
#endif
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