Function mi_unix_mmap_fd

3rd/mimalloc-2.0.9/src/os.c:585–594

}

static int mi_unix_mmap_fd(void) {
#if defined(VM_MAKE_TAG)
  // macOS: tracking anonymous page with a specific ID. (All up to 98 are taken officially but LLVM sanitizers had taken 99)
  int os_tag = (int)mi_option_get(mi_option_os_tag);
  if (os_tag < 100 || os_tag > 255) os_tag = 100;
  return VM_MAKE_TAG(os_tag);
#else
  return -1;
#endif
}

static void* mi_unix_mmap(void* addr, size_t size, size_t try_alignment, int protect_flags, bool large_only, bool allow_large, bool* is_large) {
  void* p = NULL;