public void GetObjectMethodTableTest()
{
using (DataTarget dt = TestTargets.AppDomains.LoadFullDump())
{
ClrRuntime runtime = dt.ClrVersions.Single().CreateRuntime();
ClrHeap heap = runtime.Heap;
int i = 0;
foreach (ulong obj in heap.EnumerateObjectAddresses())
{
i++;
ClrType type = heap.GetObjectType(obj);
if (type.IsArray)
{
ulong mt, cmt;
bool result = heap.TryGetMethodTable(obj, out mt, out cmt);
Assert.True(result);
Assert.NotEqual(0ul, mt);
Assert.Equal(type.MethodTable, mt);
Assert.Same(type, heap.GetTypeByMethodTable(mt, cmt));
}
else
{
ulong mt = heap.GetMethodTable(obj);
Assert.NotEqual(0ul, mt);
Assert.Contains(mt, type.EnumerateMethodTables());
Assert.Same(type, heap.GetTypeByMethodTable(mt));
Assert.Same(type, heap.GetTypeByMethodTable(mt, 0));
ulong mt2, cmt;
bool res = heap.TryGetMethodTable(obj, out mt2, out cmt);
Assert.True(res);
Assert.Equal(mt, mt2);
Assert.Equal(0ul, cmt);
}
}
}
}
/// <summary> /// Attempts to retrieve the MethodTable and component MethodTable from the given object. /// Note that this some ClrTypes cannot be uniquely determined by MethodTable alone. In /// Desktop CLR (prior to v4.6), arrays of reference types all use the same MethodTable but /// also carry a second MethodTable (called the component MethodTable) to determine the /// array element types. Note this function has undefined behavior if you do not pass a /// valid object reference to it. /// </summary> /// <param name="obj">The object to get the MethodTable of.</param> /// <param name="methodTable">The MethodTable for the given object.</param> /// <param name="componentMethodTable">The component MethodTable of the given object.</param> /// <returns>True if methodTable was filled, false if we failed to read memory.</returns> /// <inheritdoc /> public bool TryGetMethodTable(ulong obj, out ulong methodTable, out ulong componentMethodTable) => Heap.TryGetMethodTable(obj, out methodTable, out componentMethodTable);