8
#if defined HAVE_STDINT_H
12
#if defined HAVE_INTTYPES_H
18
#define CHECK(x) !(x) ? abort() : 0
20
/* Define __UNUSED__ that also other compilers than gcc can run the tests. */
23
#define __UNUSED__ __attribute__((__unused__))
28
/* Prefer MAP_ANON(YMOUS) to /dev/zero, since we don't need to keep a
31
# undef HAVE_MMAP_DEV_ZERO
33
# include <sys/mman.h>
35
# define MAP_FAILED -1
37
# if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
38
# define MAP_ANONYMOUS MAP_ANON
44
#ifdef HAVE_MMAP_DEV_ZERO
46
# include <sys/mman.h>
48
# define MAP_FAILED -1
63
/* Tru64 UNIX kludge. */
64
#if defined(__alpha__) && defined(__osf__)
65
/* Tru64 UNIX V4.0 doesn't support %lld/%lld, but long is 64-bit. */
75
/* PA HP-UX kludge. */
76
#if defined(__hppa__) && defined(__hpux__) && !defined(PRIuPTR)
80
/* Solaris < 10 kludge. */
81
#if defined(__sun__) && defined(__svr4__) && !defined(PRIuPTR)
82
#if defined(__arch64__) || defined (__x86_64__)
91
allocate_mmap (size_t size)
94
#if defined (HAVE_MMAP_DEV_ZERO)
95
static int dev_zero_fd = -1;
98
#ifdef HAVE_MMAP_DEV_ZERO
99
if (dev_zero_fd == -1)
101
dev_zero_fd = open ("/dev/zero", O_RDONLY);
102
if (dev_zero_fd == -1)
104
perror ("open /dev/zero: %m");
111
#ifdef HAVE_MMAP_ANON
112
page = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
113
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
115
#ifdef HAVE_MMAP_DEV_ZERO
116
page = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
117
MAP_PRIVATE, dev_zero_fd, 0);
120
if (page == (void *) MAP_FAILED)
122
perror ("virtual memory exhausted");