Branch
Hash :
abe5d60f
Author :
Date :
2025-09-10T23:03:55
Remove support for IRIX and Solaris <= 7 regarding old mmap. * m4/mmap-anon.m4 (gl_FUNC_MMAP_ANON): Don't define HAVE_MAP_ANONYMOUS. * m4/memchr.m4 (gl_FUNC_MEMCHR): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * m4/strncat.m4 (gl_FUNC_STRNCAT): Likewise. * lib/get-rusage-as.c (MAP_FILE): Remove macro. (get_rusage_as_via_setrlimit): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * modules/get-rusage-as (Depends-on): Remove 'open'. * lib/pagealign_alloc.c (MAP_FILE): Remove macro. (pagealign_alloc): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * modules/pagealign_alloc (Depends-on): Remove 'open'. * lib/vma-iter.c: Remove code for IRIX. (vma_iterate): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * lib/vma-iter.h: Remove code for IRIX. * lib/stackvma.c: Remove code for IRIX. (vma_iterate): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * lib/stackvma.h: Remove code for IRIX. * tests/mmap-anon-util.h: (zero_fd, map_flags, MAP_FILE): Remove macros. (mmap_zeromap): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * tests/zerosize-ptr.h (MAP_FILE): Remove macro. (zerosize_ptr): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * tests/jit/test-cache.c (main): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * tests/test-sigsegv-catch-segv1.c (main): Assume that mmap supports MAP_ANONYMOUS or MAP_ANON. * tests/test-sigsegv-catch-segv2.c (main): Likewise. * tests/test-sigsegv-catch-stackoverflow2.c (main): Likewise. * tests/test-vma-prot.c: Test HAVE_MMAP instead of HAVE_MAP_ANONYMOUS.
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/* Some auxiliary stuff for using mmap & friends.
Copyright (C) 2002-2025 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 2 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 <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible. */
#if defined _WIN32 && !defined __CYGWIN__
/* ------------------------ Windows ------------------------ */
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
# include <winerror.h>
# define PROT_NONE PAGE_NOACCESS
# define PROT_READ PAGE_READONLY
# define PROT_READ_WRITE PAGE_READWRITE
static void *
mmap_zeromap (void *map_addr_hint, size_t map_len)
{
if (VirtualAlloc ((void *)((uintptr_t) map_addr_hint & -0x10000),
(((uintptr_t) map_addr_hint + map_len - 1) | 0xffff) + 1
- ((uintptr_t) map_addr_hint & -0x10000),
MEM_RESERVE, PAGE_NOACCESS)
&& VirtualAlloc (map_addr_hint, map_len, MEM_COMMIT, PAGE_READWRITE))
return map_addr_hint;
else
return (void *)(-1);
}
int
munmap (void *addr, size_t len)
{
if (VirtualFree (addr, len, MEM_DECOMMIT))
return 0;
else
return -1;
}
int
mprotect (void *addr, size_t len, int prot)
{
DWORD oldprot;
if (VirtualProtect (addr, len, prot, &oldprot))
return 0;
else
return -1;
}
#else
/* ------------------------ Unix ------------------------ */
# include <sys/types.h>
# include <sys/mman.h>
# include <fcntl.h>
# ifndef PROT_NONE
# define PROT_NONE 0
# endif
# define PROT_READ_WRITE (PROT_READ|PROT_WRITE)
static void *
mmap_zeromap (void *map_addr_hint, size_t map_len)
{
# ifdef __hpux
/* HP-UX 10 mmap() often fails when given a hint. So give the OS complete
freedom about the address range. */
return (void *) mmap ((void *) 0, map_len, PROT_READ_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
# else
return (void *) mmap (map_addr_hint, map_len, PROT_READ_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
# endif
}
#endif