public void StringEmptyTest()
{
using DataTarget dt = TestTargets.Types.LoadFullDump();
using ClrRuntime runtime = dt.ClrVersions.Single().CreateRuntime();
ClrType strType = runtime.Heap.StringType;
var statics = strType.StaticFields;
ulong valueSlot = Assert.Single(statics).GetAddress(runtime.AppDomains[0]);
Assert.NotEqual(0ul, valueSlot);
ulong address = dt.DataReader.ReadPointer(valueSlot);
Assert.NotEqual(0ul, address);
ClrObject obj = runtime.Heap.GetObject(address);
Assert.True(obj.Type.IsString);
string strValue = obj.AsString();
Assert.Equal("", strValue);
ClrSegment seg = runtime.Heap.GetSegmentByAddress(valueSlot);
Assert.NotNull(seg);
ulong prev = seg.GetPreviousObjectAddress(valueSlot);
Assert.NotEqual(0ul, prev);
ClrObject staticsArray = runtime.Heap.GetObject(prev);
Assert.True(staticsArray.IsValid);
Assert.True(staticsArray.IsArray);
}
public ClrObject?AsObject()
{
if (_object.HasValue)
{
return(_object.Value);
}
// It's possible that ObjectPointer points the beginning of an object, though that's rare. Check that first.
ClrType?type = _segment.Heap.GetObjectType(ObjectPointer);
if (!(type is null))
{
_object = new ClrObject(ObjectPointer, type);
return(_object.Value);
}
// ObjectPointer is pointing in the middle of an object, get the previous object for the address.
ulong obj = _segment.GetPreviousObjectAddress(ObjectPointer);
if (obj == 0)
{
return(null);
}
type = _segment.Heap.GetObjectType(obj);
if (type is null)
{
// This is heap corruption, or an inconsistent dump. We should have found a real object here.
return(null);
}
ClrObject result = new ClrObject(obj, type);
_object = result;
return(result);
}
