43   return false;
  44 }
  45 
  46 inline bool os::uses_stack_guard_pages() {
  47   return true;
  48 }
  49 
  50 inline bool os::allocate_stack_guard_pages() {
  51   assert(uses_stack_guard_pages(), "sanity check");
  52   return true;
  53 }
  54 
  55 
  56 // On Linux, reservations are made on a page by page basis, nothing to do.
  57 inline void os::pd_split_reserved_memory(char *base, size_t size,
  58                                       size_t split, bool realloc) {
  59 }
  60 
  61 
  62 // Bang the shadow pages if they need to be touched to be mapped.
  63 inline void os::bang_stack_shadow_pages() {
  64 }
  65 
  66 inline void os::dll_unload(void *lib) {
  67   ::dlclose(lib);
  68 }
  69 
  70 inline const int os::default_file_open_flags() { return 0;}
  71 
  72 inline DIR* os::opendir(const char* dirname)
  73 {
  74   assert(dirname != NULL, "just checking");
  75   return ::opendir(dirname);
  76 }
  77 
  78 inline int os::readdir_buf_size(const char *path)
  79 {
  80   return NAME_MAX + sizeof(dirent) + 1;
  81 }
  82 
  83 inline jlong os::lseek(int fd, jlong offset, int whence) {

  43   return false;
  44 }
  45 
  46 inline bool os::uses_stack_guard_pages() {
  47   return true;
  48 }
  49 
  50 inline bool os::allocate_stack_guard_pages() {
  51   assert(uses_stack_guard_pages(), "sanity check");
  52   return true;
  53 }
  54 
  55 
  56 // On Linux, reservations are made on a page by page basis, nothing to do.
  57 inline void os::pd_split_reserved_memory(char *base, size_t size,
  58                                       size_t split, bool realloc) {
  59 }
  60 
  61 
  62 // Bang the shadow pages if they need to be touched to be mapped.
  63 inline void os::map_stack_shadow_pages() {
  64 }
  65 
  66 inline void os::dll_unload(void *lib) {
  67   ::dlclose(lib);
  68 }
  69 
  70 inline const int os::default_file_open_flags() { return 0;}
  71 
  72 inline DIR* os::opendir(const char* dirname)
  73 {
  74   assert(dirname != NULL, "just checking");
  75   return ::opendir(dirname);
  76 }
  77 
  78 inline int os::readdir_buf_size(const char *path)
  79 {
  80   return NAME_MAX + sizeof(dirent) + 1;
  81 }
  82 
  83 inline jlong os::lseek(int fd, jlong offset, int whence) {