libffi/testsuite/libffi.special/ffitestcxx.h

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