mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/* This test file is part of GDB, the GNU debugger.
|
|
|
|
Copyright 2021-2024 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
#include <stdint.h>
|
|
|
|
/* Return true if address P is ALIGNMENT-byte aligned. */
|
|
|
|
static int
|
|
is_aligned (void *p, size_t alignment)
|
|
{
|
|
size_t mask = (alignment - 1);
|
|
return ((uintptr_t)p & mask) == 0;
|
|
}
|
|
|
|
/* Allocate SIZE memory with ALIGNMENT, and return it. If FREE_POINTER,
|
|
return in it the corresponding pointer to be passed to free.
|
|
|
|
Do the alignment precisely, in other words, if an alignment of 4 is
|
|
requested, make sure the pointer is 4-byte aligned, but not 8-byte
|
|
aligned. In other words, make sure the pointer is not overaligned.
|
|
|
|
The benefit of using precise alignment is that accidentally specifying
|
|
a too low alignment will not be compensated by accidental
|
|
overalignment. */
|
|
|
|
static void *
|
|
precise_aligned_alloc (size_t alignment, size_t size, void **free_pointer)
|
|
{
|
|
/* Allocate extra to compensate for "p += alignment". */
|
|
size_t alloc_size = size + alignment;
|
|
|
|
/* Align extra, to be able to do precise align. */
|
|
void *p = aligned_alloc (alignment * 2, alloc_size);
|
|
assert (p != NULL);
|
|
void *p_orig = p;
|
|
void *p_end = p + alloc_size;
|
|
|
|
/* Make p precisely aligned. */
|
|
p += alignment;
|
|
|
|
/* Verify p is without bounds, and points to large enough area. */
|
|
assert (p >= p_orig);
|
|
assert (p + size <= p_end);
|
|
|
|
/* Verify required alignment. */
|
|
assert (is_aligned (p, alignment));
|
|
|
|
/* Verify required alignment is precise. */
|
|
assert (! is_aligned (p, 2 * alignment));
|
|
|
|
if (free_pointer != NULL)
|
|
*free_pointer = p_orig;
|
|
|
|
return p;
|
|
}
|
|
|
|
/* Duplicate data SRC of size SIZE to a newly allocated, precisely aligned
|
|
location with alignment ALIGNMENT. */
|
|
|
|
static void *
|
|
precise_aligned_dup (size_t alignment, size_t size, void **free_pointer,
|
|
void *src)
|
|
{
|
|
void *p = precise_aligned_alloc (alignment, size, free_pointer);
|
|
|
|
memcpy (p, src, size);
|
|
|
|
return p;
|
|
}
|