public void EnumerateMethodTableTest()
{
using (DataTarget dt = TestTargets.AppDomains.LoadFullDump())
{
ClrRuntime runtime = dt.ClrVersions.Single().CreateRuntime();
ClrHeap heap = runtime.Heap;
ulong[] fooObjects = (from obj in heap.EnumerateObjectAddresses()
let t = heap.GetObjectType(obj)
where t.Name == "Foo"
select obj).ToArray();
// There are exactly two Foo objects in the process, one in each app domain.
// They will have different method tables.
Assert.Equal(2, fooObjects.Length);
ClrType fooType = heap.GetObjectType(fooObjects[0]);
Assert.NotSame(fooType, heap.GetObjectType(fooObjects[1]));
ClrRoot appDomainsFoo = (from root in heap.EnumerateRoots(true)
where root.Kind == GCRootKind.StaticVar && root.Type == fooType
select root).Single();
ulong nestedExceptionFoo = fooObjects.Where(obj => obj != appDomainsFoo.Object).Single();
ClrType nestedExceptionFooType = heap.GetObjectType(nestedExceptionFoo);
Assert.NotSame(nestedExceptionFooType, appDomainsFoo.Type);
ulong nestedExceptionFooMethodTable = dt.DataReader.ReadPointerUnsafe(nestedExceptionFoo);
ulong appDomainsFooMethodTable = dt.DataReader.ReadPointerUnsafe(appDomainsFoo.Object);
// These are in different domains and should have different type handles:
Assert.NotEqual(nestedExceptionFooMethodTable, appDomainsFooMethodTable);
// The MethodTable returned by ClrType should always be the method table that lives in the "first"
// AppDomain (in order of ClrAppDomain.Id).
Assert.Equal(appDomainsFooMethodTable, fooType.MethodTable);
// Ensure that we enumerate two type handles and that they match the method tables we have above.
ulong[] methodTableEnumeration = fooType.EnumerateMethodTables().ToArray();
Assert.Equal(2, methodTableEnumeration.Length);
// These also need to be enumerated in ClrAppDomain.Id order
Assert.Equal(appDomainsFooMethodTable, methodTableEnumeration[0]);
Assert.Equal(nestedExceptionFooMethodTable, methodTableEnumeration[1]);
}
}
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> /// Enumerates all MethodTable for this type in the process. MethodTable /// are unique to an AppDomain/Type pair, so when there are multiple domains /// there may be multiple MethodTable. Note that even if a type could be /// used in an AppDomain, that does not mean we actually have a MethodTable /// if the type hasn't been created yet. /// </summary> /// <returns> /// An enumeration of MethodTable in the process for this given /// type. /// </returns> /// <inheritdoc /> public IEnumerable <ulong> EnumerateMethodTables() => ClrType.EnumerateMethodTables();
