private static CleanerHandles FindHandlesForOldCleaner(MethodHandles.Lookup lookup)
{
try
{
Type oldCleaner = Type.GetType("sun.misc.Cleaner");
return(CleanerHandles.Of(FindCreationMethod("create", lookup, oldCleaner), FindCleanMethod(lookup, oldCleaner)));
}
catch (Exception oldCleanerException) when(oldCleanerException is ClassNotFoundException || oldCleanerException is NoSuchMethodException || oldCleanerException is IllegalAccessException)
{
throw new LinkageError("Unable to find cleaner methods.", oldCleanerException);
}
}
/// <summary>
/// Create a new GrabAllocator that will allocate the given amount of memory, to pointers that are aligned to the
/// given alignment size. </summary>
/// <param name="expectedMaxMemory"> The maximum amount of memory that this memory manager is expected to allocate. The
/// actual amount of memory used can end up greater than this value, if some of it gets wasted on alignment padding. </param>
/// <param name="memoryTracker"> memory usage tracker </param>
internal GrabAllocator(long expectedMaxMemory, MemoryAllocationTracker memoryTracker)
{
this._grabs = new Grabs(expectedMaxMemory, memoryTracker);
try
{
CleanerHandles handles = FindCleanerHandles();
this._cleaner = handles.Creator.invoke(this, new GrabsDeallocator(_grabs));
this._cleanHandle = handles.Cleaner;
}
catch (Exception throwable)
{
throw new LinkageError("Unable to instantiate cleaner", throwable);
}
}
private static CleanerHandles FindHandlesForNewCleaner(MethodHandles.Lookup lookup)
{
try
{
Objects.requireNonNull(_globalCleanerInstance);
Type newCleaner = _globalCleanerInstance.GetType();
Type newCleanable = Type.GetType("java.lang.ref.Cleaner$Cleanable");
MethodHandle registerHandle = FindCreationMethod("register", lookup, newCleaner);
registerHandle = registerHandle.bindTo(_globalCleanerInstance);
return(CleanerHandles.Of(registerHandle, FindCleanMethod(lookup, newCleanable)));
}
catch (Exception newCleanerException) when(newCleanerException is ClassNotFoundException || newCleanerException is NoSuchMethodException || newCleanerException is IllegalAccessException)
{
throw new LinkageError("Unable to find cleaner methods.", newCleanerException);
}
}
