public ulong GetTaskStateFromAddress(ulong address)
{
const string stateFieldName = "m_stateFlags";
var type = _heap.GetObjectType(address);
if ((type != null) && (type.Name.StartsWith("System.Threading.Tasks.Task")))
{
// could be other Task-prefixed types in the same namespace such as TaskCompletionSource
if (type.GetFieldByName(stateFieldName) == null)
{
return(0);
}
return((ulong)_heap.GetObject(address).ReadField <int>(stateFieldName));
}
return(0);
}
private void CalculateTypeStatisticsPhase2(ClrHeap heap, Regex typesToReportStatisticsOnRegex, HashSet <ulong> markedObjects, TypeStatistics typeStatistics)
{
typeStatistics.MemoryProfilingStopwatch.Start();
HashSet <ulong> visitedObjects = new HashSet <ulong>();
Queue <ClrObject> objectQueue = new Queue <ClrObject>();
// Start with exclusive = inclusive and walk the heap from roots looking for objects to subtract from this number.
typeStatistics.ExclusiveRetainedBytes = typeStatistics.InclusiveRetainedBytes;
foreach (ClrRoot root in heap.EnumerateRoots())
{
// Interested only in roots outside of our marked inclusive graph.
if (!markedObjects.Contains(root.Object))
{
ClrObject rootObj = heap.GetObject(root.Object);
objectQueue.Enqueue(rootObj);
visitedObjects.Add(root.Object);
while (objectQueue.Count > 0)
{
ClrObject obj = objectQueue.Dequeue();
if (obj.IsNull || obj.Type == null)
{
continue;
}
// We stop the walk when we see an object of a type we are reporting statistics on.
if (!typesToReportStatisticsOnRegex.IsMatch(obj.Type.Name))
{
if (markedObjects.Contains(obj.Address))
{
// Not an object of a type we are reporting statistics on but it is part of the inclusive object graph.
// This means that it must not be reported in the exclusive bytes.
typeStatistics.ExclusiveRetainedBytes -= obj.Size;
markedObjects.Remove(obj.Address);
}
// Follow all references.
foreach (var reference in obj.EnumerateObjectReferences())
{
if (!reference.IsNull && !visitedObjects.Contains(reference.Address))
{
visitedObjects.Add(reference.Address);
objectQueue.Enqueue(reference);
}
}
}
}
}
}
typeStatistics.MemoryProfilingStopwatch.Stop();
}
private void DebugObjectFields()
{
ClrHeap heap = Context.Heap;
ClrObject clrObject = heap.GetObject(0x2910237db80);
Debug.WriteLine("Name Dec Offset Hex Offset Type");
foreach (var field in clrObject.Type.Fields)
{
Debug.WriteLine($"{field.Name,-25} {field.Offset,10} {field.Offset,10:x} {field.Type?.Name}");
}
}
static void Main(string[] args)
{
if (args.Length != 3)
{
Console.WriteLine("Usage: DumpDict [dump] [objref]");
Environment.Exit(1);
}
if (ulong.TryParse(args[2], System.Globalization.NumberStyles.HexNumber, null, out ulong objAddr))
{
Console.WriteLine($"Could not parse object ref '{args[2]}'.");
Environment.Exit(1);
}
string dumpFileName = args[0];
string dacPath = args[1];
using DataTarget dataTarget = DataTarget.LoadDump(dumpFileName);
using ClrRuntime runtime = dataTarget.ClrVersions.Single().CreateRuntime();
ClrHeap heap = runtime.Heap;
ClrObject obj = heap.GetObject(objAddr);
if (!obj.IsValidObject)
{
Console.WriteLine("Invalid object {0:X}", obj);
return;
}
if (!obj.Type.Name.StartsWith("System.Collections.Generic.Dictionary"))
{
Console.WriteLine("Error: Expected object {0:X} to be a dictionary, instead it's of type '{1}'.");
return;
}
// Get the entries field.
ClrArray entries = obj.ReadObjectField("entries").AsArray();
Console.WriteLine("{0,8} {1,16} : {2}", "hash", "key", "value");
for (int i = 0; i < entries.Length; ++i)
{
ClrObject entry = entries.GetObjectValue(i);
// TODO: Need to handle non-object references
int hashCode = entry.ReadField <int>("hashCode");
ClrObject key = entry.ReadObjectField("key");
ClrObject value = entry.ReadObjectField("value");
Console.WriteLine($"{hashCode:x} {key} -> {value}");
}
}
public void PrevObject()
{
using DataTarget dt = TestTargets.Types.LoadFullDump();
using ClrRuntime runtime = dt.ClrVersions.Single().CreateRuntime();
ClrHeap heap = runtime.Heap;
foreach (ClrSegment seg in heap.Segments)
{
ClrObject prev = heap.GetObject(seg.FirstObjectAddress);
Assert.Equal(0ul, seg.GetPreviousObjectAddress(prev));
foreach (ClrObject curr in seg.EnumerateObjects().Skip(1))
{
Assert.Equal(prev.Address, seg.GetPreviousObjectAddress(curr));
prev = curr;
}
}
}
/// <summary>
/// Enumerates all objects reachable from GC roots in the given heap. Each object is returned exactly once.
/// </summary>
private IEnumerable <ClrObject> EnumerateRootedObjects(ClrHeap heap)
{
HashSet <ulong> visitedObjects = new HashSet <ulong>();
Queue <ClrObject> objectQueue = new Queue <ClrObject>();
foreach (ClrRoot root in heap.EnumerateRoots())
{
if (!visitedObjects.Contains(root.Object))
{
ClrObject rootObj = heap.GetObject(root.Object);
objectQueue.Enqueue(rootObj);
visitedObjects.Add(root.Object);
if (rootObj.Type != null)
{
yield return(rootObj);
}
while (objectQueue.Count > 0)
{
ClrObject obj = objectQueue.Dequeue();
if (obj.IsNull || obj.Type == null)
{
continue;
}
// Follow all references.
foreach (var reference in obj.EnumerateObjectReferences())
{
if (!reference.IsNull && !visitedObjects.Contains(reference.Address))
{
objectQueue.Enqueue(reference);
visitedObjects.Add(reference.Address);
yield return(reference);
}
}
}
}
}
}
public HeapIndex(ClrHeap heap)
{
// Evaluation stack
Stack <ulong> eval = new Stack <ulong>();
_roots = new ObjectSet(heap);
_walkableFromRoot = new ObjectSet(heap);
foreach (var clrRoot in heap.EnumerateRoots())
{
_roots.Add(clrRoot.Object);
eval.Push(clrRoot.Object);
}
while (eval.Count > 0)
{
// Pop an object, ignore it if we've seen it before.
var address = eval.Pop();
if (_walkableFromRoot.Contains(address))
{
continue;
}
_walkableFromRoot.Add(address);
// Grab the type. We will only get null here in the case of heap corruption.
ClrType?type = heap.GetObjectType(address);
if (type == null)
{
continue;
}
// Now enumerate all objects that this object points to, add them to the
// evaluation stack if we haven't seen them before.
if (type.IsArray)
{
EnumerateArrayElements(address);
}
else
{
EnumerateFields(type, address);
}
}
void EnumerateArrayElements(ulong address)
{
var obj = heap.GetObject(address);
var array = obj.AsArray();
var componentType = ((ClrmdArrayType)array.Type).ComponentType;
if (componentType.IsObjectReference)
{
foreach (var arrayElement in ArrayProxy.EnumerateObjectItems(array))
{
if (!arrayElement.IsNull)
{
AddReference(address, arrayElement.Address);
eval.Push(arrayElement.Address);
}
}
}
else
{
// throw new NotSupportedException($"Enumerating array of {componentType} type is not supported");
}
}
void EnumerateFields(ClrType?type, ulong address)
{
foreach (var instanceField in type.Fields)
{
if (instanceField.IsObjectReference)
{
var fieldObject = instanceField.ReadObject(address, false);
if (!fieldObject.IsNull)
{
AddReference(address, fieldObject.Address);
eval.Push(fieldObject.Address);
}
}
}
}
}
private static (uint, ulong) PopulateReferencedObjects(ClrHeap heap, ClrObjectModel clrObjModel)
{
// Evaluation stack
var eval = new Stack <ulong>();
var addressToClrObjectModel = new Dictionary <ulong, ClrObjectModel>
{
{ clrObjModel.Address, clrObjModel }
};
// To make sure we don't count the same object twice, we'll keep a set of all objects
// we've seen before. Note the ObjectSet here is basically just "HashSet<ulong>".
// However, HashSet<ulong> is *extremely* memory inefficient. So we use our own to
// avoid OOMs.
var currentObj = clrObjModel.Address;
var considered = new ObjectSet(heap);
uint count = 0;
ulong size = 0;
eval.Push(currentObj);
while (eval.Count > 0)
{
// Pop an object, ignore it if we've seen it before.
currentObj = eval.Pop();
if (considered.Contains(currentObj))
{
continue;
}
considered.Add(currentObj);
// Grab the type. We will only get null here in the case of heap corruption.
ClrType type = heap.GetObjectType(currentObj);
if (type == null)
{
continue;
}
count++;
size += type.GetSize(currentObj);
// Now enumerate all objects that this object points to, add them to the
// evaluation stack if we haven't seen them before.
type.EnumerateRefsOfObject(currentObj, delegate(ulong child, int offset)
{
if (child != 0 && !considered.Contains(child))
{
var childObj = heap.GetObject(child);
ClrObjectModel childClrModel = null;
if (addressToClrObjectModel.ContainsKey(childObj))
{
childClrModel = addressToClrObjectModel[childObj];
}
else
{
childClrModel = new ClrObjectModel
{
TypeName = childObj.Type.Name,
Address = childObj,
ReferencedObjects = new List <ClrObjectModel>(),
};
addressToClrObjectModel[currentObj] = childClrModel;
}
addressToClrObjectModel[currentObj].ReferencedObjects.Add(childClrModel);
eval.Push(child);
}
});
}
return(count, size);
}
public static void LogTaskObjects(RuntimeContext runtimeContext, ILogger logger, bool includeCompleted,
bool statOnly)
{
ClrHeap heap = runtimeContext.Heap;
logger.LogInformation("Tasks:");
// TODO System.Threading.Tasks.VoidTaskResult
var taskQuery =
from address in heap.EnumerateObjects()
let type = address.Type
where type != null &&
!type.IsFree &&
type.Name != null && // TODO find better way
(type.Name == "System.Threading.Tasks.Task" ||
(type.Name.StartsWith("System.Threading.Tasks.Task<", StringComparison.Ordinal) &&
type.Name.EndsWith(">", StringComparison.Ordinal))) &&
(type.BaseType.Name == "System.Threading.Tasks.Task" ||
type.EnumerateInterfaces().Any(i => i.Name == "System.IAsyncResult"))
select new { Type = type, Address = address };
var taskStat = new Dictionary <string, int>();
foreach (var taskInfo in taskQuery)
{
var taskObject = heap.GetObject(taskInfo.Address);
var taskProxy = new TaskProxy(runtimeContext, taskObject);
var taskIsCompleted = taskProxy.IsCompleted;
if (!includeCompleted)
{
if (taskIsCompleted)
{
continue;
}
}
if (statOnly)
{
var taskTypeName = taskInfo.Type.Name !;
taskStat.IncrementValue(taskTypeName);
}
else
{
logger.LogInformation($"{taskInfo.Address:X} {taskInfo.Type} taskIsCompleted={taskIsCompleted}");
var actionObject = taskObject.ReadObjectField("m_action");
if (!actionObject.IsNull && actionObject.Type.Name == "System.Action")
{
var ptr = actionObject.ReadValueTypeField("_methodPtr")
.ReadField <UIntPtr>("m_value")
.ToUInt64();
var clrMethod = heap.Runtime.GetMethodByInstructionPointer(ptr);
if (clrMethod != null)
{
logger.LogInformation($"method = {clrMethod.Name}");
}
}
foreach (var clrInstanceField in taskInfo.Type.Fields)
{
if (clrInstanceField.Name == "m_parent")
{
continue;
}
if (clrInstanceField.Name == "m_stateObject")
{
continue;
}
if (clrInstanceField.Name == "m_taskScheduler")
{
continue;
}
if (clrInstanceField.Name == "m_contingentProperties")
{
continue;
}
if (clrInstanceField.Name == "m_taskId")
{
continue;
}
// logger.LogInformation($"{clrInstanceField.Name} ----------------------");
// var fieldValue = clrInstanceField.GetValue(taskInfo.Address);
if (clrInstanceField.IsPrimitive)
{
if (clrInstanceField.Name == "m_stateFlags")
{
var stateValue = clrInstanceField.Read <int>(taskInfo.Address, false);
logger.LogInformation($"{clrInstanceField.Name} = ");
foreach (var statePair in TaskProxy.TaskStates)
{
if ((statePair.Key & stateValue) == statePair.Key)
{
logger.LogInformation($"{statePair.Value} |");
}
}
continue;
}
// logger.LogInformation($"{clrInstanceField.Name} = {fieldValue}");
// continue;
}
// if (clrInstanceField.IsObjectReference)
// {
// var fieldAaddress = (ulong) fieldValue;
// if (fieldAaddress == 0)
// {
// logger.LogInformation($"{clrInstanceField.Name} = {{null}}");
// continue;
// }
//
// var fieldType = heap.GetObjectType(fieldAaddress);
// logger.LogInformation($"{clrInstanceField.Name} = {fieldAaddress:X} {fieldType}");
// if (fieldType.Name == "System.Action")
// {
// //heap.PrintObjectFields(fieldAaddress, fieldType, 1);
//
// var targetField = fieldType.GetFieldByName("_target");
// var targetFieldAddress = (ulong) targetField.GetValue(fieldAaddress);
// if (targetFieldAddress == 0)
// {
// logger.LogInformation("\t_target = {null}");
// }
// else
// {
// logger.LogInformation($"\t_target = {heap.GetObjectType(targetFieldAddress)}");
//
// // TODO if it is "System.Runtime.CompilerServices.AsyncMethodBuilderCore+MoveNextRunner" then take "m_stateMachine" field
// }
//
// var methodPtrField = fieldType.GetFieldByName("_methodPtr");
// var methodPtrValue = (long) methodPtrField.GetValue(fieldAaddress);
//
// var methodPtrWithOffset = 5UL + (ulong) methodPtrValue;
// heap.ReadPointer(methodPtrWithOffset + 2, out ulong someVal1);
// heap.ReadPointer(methodPtrWithOffset + 1, out ulong someVal2);
// heap.ReadPointer(methodPtrWithOffset + (someVal1 & 0xFF) * 8 + 3, out ulong baseMethodDesc);
// var offset = (someVal2 & 0xFF) * 8;
// var handle = baseMethodDesc + offset;
// var method = runtime.GetMethodByHandle(handle);
//
// //var methodByAddress = runtime.GetMethodByAddress(methodPtrValue);
// //var methodByHandle = runtime.GetMethodByHandle(methodPtrValue);
//
// //logger.LogInformation($"methodByAddress = {methodByAddress}");
// PrintIndention(1);
// logger.LogInformation($"methodByHandle = {method}");
// }
//
// continue;
// }
//
// if (clrInstanceField.IsValueClass)
// {
// logger.LogInformation($"{clrInstanceField.Name} {clrInstanceField.Type}");
// continue;
// }
//
// logger.LogInformation($"{clrInstanceField.Name} UNKNOWN TYPE");
}
}
}
if (statOnly)
{
foreach (var i in taskStat.OrderByDescending(t => t.Value))
{
logger.LogInformation($"{i.Key} {i.Value}");
}
}
}