src/hotspot/share/runtime/os.cpp

rev 54422 : 8221833: Readability check in Symbol::is_valid not performed for some addresses
Reviewed-by: zgu, coleenp

*** 1022,1033 ****
    int deadbeef = 0xdeadbeef;  // tester value 2
    return (SafeFetch32(aligned, cafebabe) != cafebabe) || (SafeFetch32(aligned, deadbeef) != deadbeef);
  }
  
  bool os::is_readable_range(const void* from, const void* to) {
!   for (address p = align_down((address)from, min_page_size()); p < to; p += min_page_size()) {
!     if (!is_readable_pointer(p)) {
        return false;
      }
    }
    return true;
  }
--- 1022,1034 ----
    int deadbeef = 0xdeadbeef;  // tester value 2
    return (SafeFetch32(aligned, cafebabe) != cafebabe) || (SafeFetch32(aligned, deadbeef) != deadbeef);
  }
  
  bool os::is_readable_range(const void* from, const void* to) {
!   if ((uintptr_t)from >= (uintptr_t)to) return false;
!   for (uintptr_t p = align_down((uintptr_t)from, min_page_size()); p < (uintptr_t)to; p += min_page_size()) {
!     if (!is_readable_pointer((const void*)p)) {
        return false;
      }
    }
    return true;
  }