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Remove __morecore and __default_morecore

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Make the __morecore and __default_morecore symbols compat-only and
remove their declarations from the API.  Also, include morecore.c
directly into malloc.c; this should ideally get merged into malloc in
a future cleanup.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Tested-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Siddhesh Poyarekar
2021-07-22 18:37:57 +05:30
parent 57b07bede1
commit 55a4dd3930
8 changed files with 24 additions and 49 deletions
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34
malloc/morecore.c
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@ -15,39 +15,27 @@
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _MALLOC_INTERNAL
# define _MALLOC_INTERNAL
# include <malloc.h>
#endif
#ifndef __GNU_LIBRARY__
# define __sbrk sbrk
#endif
#ifdef __GNU_LIBRARY__
/* It is best not to declare this and cast its result on foreign operating
systems with potentially hostile include files. */
# include <stddef.h>
# include <stdlib.h>
extern void *__sbrk (ptrdiff_t increment) __THROW;
libc_hidden_proto (__sbrk)
#endif
#ifndef NULL
# define NULL 0
#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 *
__default_morecore (ptrdiff_t increment)
__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;
}
libc_hidden_def (__default_morecore)
#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_34)
compat_symbol (libc, __glibc_morecore, __default_morecore, GLIBC_2_0);
#endif