libffi/testsuite/libffi.special/ffitestcxx.h

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