/// <summary>
/// Gets the given object reference field from this ClrObject. Throws ArgumentException if the given field does
/// not exist in the object. Throws NullReferenceException if IsNull is true.
/// </summary>
/// <param name="fieldName">The name of the field to retrieve.</param>
/// <returns>A ClrObject of the given field.</returns>
public ClrObject GetObjectField(string fieldName)
{
if (IsNull)
{
throw new NullReferenceException();
}
ClrInstanceField field = Type.GetFieldByName(fieldName);
if (field == null)
{
throw new ArgumentException($"Type '{Type.Name}' does not contain a field named '{fieldName}'");
}
if (!field.IsObjectReference)
{
throw new ArgumentException($"Field '{Type.Name}.{fieldName}' is not an object reference.");
}
ClrHeap heap = Type.Heap;
ulong addr = field.GetAddress(Address);
if (!heap.ReadPointer(addr, out ulong obj))
{
throw new MemoryReadException(addr);
}
ClrType type = heap.GetObjectType(obj);
return(new ClrObject(obj, type));
}
/// <summary>
/// Gets an object reference field from ClrObject. Any field which is a subclass of System.Object
/// </summary>
/// <param name="fieldName">The name of the field to retrieve.</param>
/// <returns></returns>
public ClrObject GetObject(string fieldName)
{
if (IsNull)
{
throw new NullReferenceException();
}
ClrType type = Type;
ClrInstanceField field = type.GetFieldByName(fieldName);
if (field == null)
{
throw new ArgumentException($"Type '{type.Name}' does not contain a field named '{fieldName}'");
}
if (!field.IsObjectReference)
{
throw new ArgumentException($"Field '{type.Name}.{fieldName}' is not an object reference.");
}
ClrHeap heap = Type.Heap;
ulong addr = ClrRuntime.IsObjectReference(ElementType) ? Object : Address;
addr = field.GetAddress(addr, Interior);
ulong obj;
if (!heap.ReadPointer(addr, out obj))
{
throw new MemoryReadException(addr);
}
return(new ClrObject(obj, heap.GetObjectType(obj)));
}
/// <summary>
/// Gets the given object reference field from this ClrObject. Throws ArgumentException if the given field does
/// not exist in the object. Throws NullReferenceException if IsNull is true.
/// </summary>
/// <param name="fieldName">The name of the field to retrieve.</param>
/// <returns>A ClrObject of the given field.</returns>
public ClrObject GetObjectField(string fieldName)
{
ClrInstanceField field = _type.GetFieldByName(fieldName);
if (field == null)
{
throw new ArgumentException(String.Format("Type '{0}' does not contain a field named '{1}'", _type.Name, fieldName));
}
if (!field.IsObjectReference)
{
throw new ArgumentException(String.Format("Field '{0}.{1}' is not an object reference.", _type.Name, fieldName));
}
ClrHeap heap = _type.Heap;
ulong addr = field.GetAddress(_address, _interior);
ulong obj;
if (!heap.ReadPointer(addr, out obj))
{
throw new MemoryReadException(addr);
}
ClrType type = heap.GetObjectType(obj);
return(new ClrObject(obj, type));
}
internal virtual IEnumerable <ClrRoot> EnumerateStackReferences(ClrThread thread, bool includeDead)
{
Address stackBase = thread.StackBase;
Address stackLimit = thread.StackLimit;
if (stackLimit <= stackBase)
{
Address tmp = stackLimit;
stackLimit = stackBase;
stackBase = tmp;
}
ClrAppDomain domain = GetAppDomainByAddress(thread.AppDomain);
ClrHeap heap = GetHeap();
var mask = ((ulong)(PointerSize - 1));
var cache = MemoryReader;
cache.EnsureRangeInCache(stackBase);
for (Address stackPtr = stackBase; stackPtr < stackLimit; stackPtr += (uint)PointerSize)
{
Address objRef;
if (cache.ReadPtr(stackPtr, out objRef))
{
// If the value isn't pointer aligned, it cannot be a managed pointer.
if (heap.IsInHeap(objRef))
{
ulong mt;
if (heap.ReadPointer(objRef, out mt))
{
ClrType type = null;
if (mt > 1024)
{
type = heap.GetObjectType(objRef);
}
if (type != null && !type.IsFree)
{
yield return(new LocalVarRoot(stackPtr, objRef, type, domain, thread, false, true, false, null));
}
}
}
}
}
}
