libffi/testsuite/libffi.call/ffitest.h

   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
  47 static inline void *
  48 allocate_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