/// <summary>
/// Marks all objects referenced
/// </summary>
/// <param name="obj"></param>
/// <param name="type"></param>
public static void SweepTypedObject(uint *obj, uint type)
{
if (obj == null)
{
return;
}
uint fields = VTablesImpl.GetGCFieldCount(type);
var offsets = VTablesImpl.GetGCFieldOffsets(type);
var types = VTablesImpl.GetGCFieldTypes(type);
for (int i = 0; i < fields; i++)
{
if (!VTablesImpl.IsValueType(types[i]))
{
var location = (uint *)((byte *)obj + offsets[i]) + 1; // +1 since we are only using 32bits from the 64bit
if (*location != 0) // Check if its null
{
location = *(uint **)location;
if (RAT.GetPageType(location) == RAT.PageType.HeapSmall)
{
MarkAndSweepObject(location);
}
}
}
else if (VTablesImpl.IsStruct(types[i]))
{
var obj1 = (uint *)((byte *)obj + offsets[i]);
SweepTypedObject(obj1, types[i]);
}
}
}
private void TestVTablesImpl()
{
object obj = new object();
Assert.AreEqual(GCImplementation.GetType(obj), ((CosmosRuntimeType)obj.GetType()).mTypeId, "Both methods to get type id return the same value for object");
string s = "a";
Assert.AreEqual(GCImplementation.GetType(s), ((CosmosRuntimeType)s.GetType()).mTypeId, "Both methods to get type id return the same value for string");
Assert.AreEqual(GCImplementation.GetType(s), ((CosmosRuntimeType)typeof(string)).mTypeId, "Methods and constato get type id return the same value for string");
List <int> x = new List <int>();
Assert.AreEqual(GCImplementation.GetType(x), ((CosmosRuntimeType)typeof(List <int>)).mTypeId, "Methods and constant get type id return the same value for List<int>");
TestType tObj = new TestType();
Assert.AreEqual(GCImplementation.GetType(tObj), ((CosmosRuntimeType)typeof(TestType)).mTypeId, "Methods and constant get type id return the same value for TestType");
Assert.AreEqual(4, VTablesImpl.GetGCFieldCount(GCImplementation.GetType(tObj)), "TestType has 4 fields tracked by GC");
var types = VTablesImpl.GetGCFieldTypes(GCImplementation.GetType(tObj));
Assert.AreEqual(4, types.Length, "GetGCFieldTypes returns correct number of values");
Assert.AreEqual(((CosmosRuntimeType)typeof(object)).mTypeId, types[0], "GetGCFieldTypes returns object at offset 0");
Assert.AreEqual(((CosmosRuntimeType)typeof(List <int>)).mTypeId, types[1], "GetGCFieldTypes returns List<int> at offset 1");
Assert.AreEqual(((CosmosRuntimeType)typeof(string)).mTypeId, types[2], "GetGCFieldTypes returns string at offset 2");
Assert.AreEqual(((CosmosRuntimeType)typeof(object)).mTypeId, types[3], "GetGCFieldTypes returns object at offset 3");
Assert.AreEqual(4, VTablesImpl.GetGCFieldOffsets(GCImplementation.GetType(tObj)).Length, "GetGCFieldOffsets returned the correct number of values");
Assert.AreEqual(new uint[] { 12, 20, 28, 36 }, VTablesImpl.GetGCFieldOffsets(GCImplementation.GetType(tObj)), "GetGCFieldOffsets returns the correct values");
ClassWithStruct classWithStruct = new ClassWithStruct();
Assert.AreEqual(3, VTablesImpl.GetGCFieldCount(GCImplementation.GetType(classWithStruct)), "ClassWithStruct has 3 fields tracked by GC");
types = VTablesImpl.GetGCFieldTypes(GCImplementation.GetType(classWithStruct));
Assert.AreEqual(((CosmosRuntimeType)typeof(object)).mTypeId, types[0], "GetGCFieldTypes returns object at offset 0");
Assert.AreEqual(((CosmosRuntimeType)typeof(TestStruct)).mTypeId, types[1], "GetGCFieldTypes returns TestStruct at offset 1");
Assert.AreEqual(((CosmosRuntimeType)typeof(object)).mTypeId, types[2], "GetGCFieldTypes returns object at offset 2");
}