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 10 /* Define __UNUSED__ that also other compilers than gcc can run the tests. */ 11 #undef __UNUSED__ 12 #if defined(__GNUC__) 13 #define __UNUSED__ __attribute__((__unused__)) 14 #else 15 #define __UNUSED__ 16 #endif 17 18 #define CHECK(x) (!(x) ? abort() : (void)0) 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 == MAP_FAILED) 78 { 79 perror ("virtual memory exhausted"); 80 exit (1); 81 } 82 83 return page; 84 } 85 86 #endif 87
