1#include <stdlib.h>
2#include <stdio.h>
3#include <string.h>
4#include <fcntl.h>
5#include <ffi.h>
6#include "fficonfig.h"
7
8#define MAX_ARGS 256
9
10#define CHECK(x) !(x) ? abort() : 0
11
12/* Define __UNUSED__ that also other compilers than gcc can run the tests.  */
13#undef __UNUSED__
14#if defined(__GNUC__)
15#define __UNUSED__ __attribute__((__unused__))
16#else
17#define __UNUSED__
18#endif
19
20/* Prefer MAP_ANON(YMOUS) to /dev/zero, since we don't need to keep a
21   file open.  */
22#ifdef HAVE_MMAP_ANON
23# undef HAVE_MMAP_DEV_ZERO
24
25# include <sys/mman.h>
26# ifndef MAP_FAILED
27#  define MAP_FAILED -1
28# endif
29# if !defined (MAP_ANONYMOUS) && defined (MAP_ANON)
30#  define MAP_ANONYMOUS MAP_ANON
31# endif
32# define USING_MMAP
33
34#endif
35
36#ifdef HAVE_MMAP_DEV_ZERO
37
38# include <sys/mman.h>
39# ifndef MAP_FAILED
40#  define MAP_FAILED -1
41# endif
42# define USING_MMAP
43
44#endif
45
46#ifdef USING_MMAP
47static inline void *
48allocate_mmap (size_t size)
49{
50  void *page;
51#if defined (HAVE_MMAP_DEV_ZERO)
52  static int dev_zero_fd = -1;
53#endif
54
55#ifdef HAVE_MMAP_DEV_ZERO
56  if (dev_zero_fd == -1)
57    {
58      dev_zero_fd = open ("/dev/zero", O_RDONLY);
59      if (dev_zero_fd == -1)
60	{
61	  perror ("open /dev/zero: %m");
62	  exit (1);
63	}
64    }
65#endif
66
67
68#ifdef HAVE_MMAP_ANON
69  page = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
70	       MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
71#endif
72#ifdef HAVE_MMAP_DEV_ZERO
73  page = mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC,
74	       MAP_PRIVATE, dev_zero_fd, 0);
75#endif
76
77  if (page == (void *) MAP_FAILED)
78    {
79      perror ("virtual memory exhausted");
80      exit (1);
81    }
82
83  return page;
84}
85
86#endif
87