lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-08-07 06:43:00 +03:00
Code Activity

(CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4.

Browse Source
This commit is contained in:
Ulrich Drepper
2004-12-22 20:10:10 +00:00
parent 0ecb606cb6
commit a334319f65
6215 changed files with 304673 additions and 494300 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
malloc/obstack.c
View File

@@ -1,7 +1,8 @@
/* obstack.c - subroutines used implicitly by object stack macros
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997,
1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library. Its master source is NOT part of
the C library, however. The master source lives in /gd/gnu/lib.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
@@ -15,9 +16,8 @@
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
@@ -52,38 +52,22 @@
# endif
#endif
#include <stddef.h>
#if defined _LIBC && defined USE_IN_LIBIO
# include <wchar.h>
#endif
#ifndef ELIDE_CODE
# if HAVE_INTTYPES_H
# include <inttypes.h>
# endif
# if HAVE_STDINT_H || defined _LIBC
# include <stdint.h>
# endif
/* Determine default alignment. */
union fooround
{
uintmax_t i;
long double d;
void *p;
};
struct fooalign
{
char c;
union fooround u;
};
struct fooalign {char x; double d;};
# define DEFAULT_ALIGNMENT \
((PTR_INT_TYPE) ((char *) &((struct fooalign *) 0)->d - (char *) 0))
/* If malloc were really smart, it would round addresses to DEFAULT_ALIGNMENT.
But in fact it might be less smart and round addresses to as much as
DEFAULT_ROUNDING. So we prepare for it to do that. */
enum
{
DEFAULT_ALIGNMENT = offsetof (struct fooalign, u),
DEFAULT_ROUNDING = sizeof (union fooround)
};
union fooround {long x; double d;};
# define DEFAULT_ROUNDING (sizeof (union fooround))
/* When we copy a long block of data, this is the unit to do it with.
On some machines, copying successive ints does not work;
@@ -159,7 +143,7 @@ _obstack_begin (struct obstack *h,
register struct _obstack_chunk *chunk; /* points to new chunk */
if (alignment == 0)
alignment = DEFAULT_ALIGNMENT;
alignment = (int) DEFAULT_ALIGNMENT;
if (size == 0)
/* Default size is what GNU malloc can fit in a 4096-byte block. */
{
@@ -186,8 +170,7 @@ _obstack_begin (struct obstack *h,
chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
if (!chunk)
(*obstack_alloc_failed_handler) ();
h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
alignment - 1);
h->next_free = h->object_base = chunk->contents;
h->chunk_limit = chunk->limit
= (char *) chunk + h->chunk_size;
chunk->prev = 0;
@@ -206,7 +189,7 @@ _obstack_begin_1 (struct obstack *h, int size, int alignment,
register struct _obstack_chunk *chunk; /* points to new chunk */
if (alignment == 0)
alignment = DEFAULT_ALIGNMENT;
alignment = (int) DEFAULT_ALIGNMENT;
if (size == 0)
/* Default size is what GNU malloc can fit in a 4096-byte block. */
{
@@ -234,8 +217,7 @@ _obstack_begin_1 (struct obstack *h, int size, int alignment,
chunk = h->chunk = CALL_CHUNKFUN (h, h -> chunk_size);
if (!chunk)
(*obstack_alloc_failed_handler) ();
h->next_free = h->object_base = __PTR_ALIGN ((char *) chunk, chunk->contents,
alignment - 1);
h->next_free = h->object_base = chunk->contents;
h->chunk_limit = chunk->limit
= (char *) chunk + h->chunk_size;
chunk->prev = 0;
@@ -277,7 +259,8 @@ _obstack_newchunk (struct obstack *h, int length)
/* Compute an aligned object_base in the new chunk */
object_base =
__PTR_ALIGN ((char *) new_chunk, new_chunk->contents, h->alignment_mask);
__INT_TO_PTR ((__PTR_TO_INT (new_chunk->contents) + h->alignment_mask)
& ~ (h->alignment_mask));
/* Move the existing object to the new chunk.
Word at a time is fast and is safe if the object
@@ -302,10 +285,7 @@ _obstack_newchunk (struct obstack *h, int length)
/* If the object just copied was the only data in OLD_CHUNK,
free that chunk and remove it from the chain.
But not if that chunk might contain an empty object. */
if (! h->maybe_empty_object
&& (h->object_base
== __PTR_ALIGN ((char *) old_chunk, old_chunk->contents,
h->alignment_mask)))
if (h->object_base == old_chunk->contents && ! h->maybe_empty_object)
{
new_chunk->prev = old_chunk->prev;
CALL_FREEFUN (h, old_chunk);
@@ -430,11 +410,12 @@ print_and_abort (void)
happen because the "memory exhausted" message appears in other places
like this and the translation should be reused instead of creating
a very similar string which requires a separate translation. */
# ifdef _LIBC
(void) __fxprintf (NULL, "%s\n", _("memory exhausted"));
# else
fprintf (stderr, "%s\n", _("memory exhausted"));
# if defined _LIBC && defined USE_IN_LIBIO
if (_IO_fwide (stderr, 0) > 0)
__fwprintf (stderr, L"%s\n", _("memory exhausted"));
else
# endif
fprintf (stderr, "%s\n", _("memory exhausted"));
exit (obstack_exit_failure);
}