/// <summary>
/// This demo shows you how to create a a graph of memory and turn it into a stackSource with MemoryGraphStackSource.
/// </summary>
public void DemoMemoryGraph()
{
// Make a custom stack source that was created out of nothing. InternStackSouce is your friend here.
MemoryGraph myGraph = new MemoryGraph(1000);
// Create a memory graph out of 'nothing'. In the example below we create a graph where the root which points at
// 'base' which has a bunch of children, each of which have a child that points back to the base node (thus it has lots of cycles)
var baseIdx = myGraph.GetNodeIndex(0); // Define the NAME (index) for the of the graph (but we have not defined what is in it)
GrowableArray <NodeIndex> children = new GrowableArray <NodeIndex>(1); // This array is reused again and again for each child.
GrowableArray <NodeIndex> rootChildren = new GrowableArray <NodeIndex>(100); // This is used to create the children of the root;
//Here I make up a graph of memory addresses at made up locations
for (Address objAddr = 0x100000; objAddr < 0x200000; objAddr += 0x10000)
{
NodeIndex nodeIdx = myGraph.GetNodeIndex(objAddr); // Create the name (node index) for the child
// Make a type for the child. In this case we make a new type for each node, normally you keep these in a interning table so that
// every distinct type name has exactly one type index. Interning is not STRICTLLY needed, but the representation assumes that
// there are many more nodes than there are types.
NodeTypeIndex nodeTypeIdx = myGraph.CreateType("MyType_" + objAddr.ToString(), "MyModule");
// Create a list of children for this node in this case, each node has exactly one child, which is the root node.
children.Clear();
children.Add(baseIdx);
// Actually define the node with the given name (nodeIdx), type, size (100 in our case) and children;
myGraph.SetNode(nodeIdx, nodeTypeIdx, 100, children);
rootChildren.Add(nodeIdx); // Remember this node name as belonging to the things that the root points at.
}
// At this point we have everything we need to define the base node, do it here.
myGraph.SetNode(baseIdx, myGraph.CreateType("[Base]"), 0, rootChildren);
// Create a root node that points at the base node.
myGraph.RootIndex = myGraph.GetNodeIndex(1);
children.Clear();
children.Add(baseIdx);
myGraph.SetNode(myGraph.RootIndex, myGraph.CreateType("[ROOT]"), 0, children);
// Note that the raw graph APIs force you to know all the children of a particular node before you can define
// the node. There is a class call MemoryNodeBuilder which makes this a bit nicer in that you can incrementally
// add children to nodes and then 'finalize' them all at once at the end. Ideally, however you don't have many
// nodes that need MemoryNodeBuilder as they are more expensive to build.
// So far, the graph is in 'write mode' where only creation APIs are allowed. Change to 'Read Mode' which no writes
// are allowed by read APIs are allowed. (We may lift this restriction at some point).
myGraph.AllowReading();
// I can dump it as XML to look at it.
using (var writer = File.CreateText("MyGraph.dump.xml"))
{
myGraph.WriteXml(writer);
}
// I can write the graph out as a file and read it back in later.
// myGraph.WriteAsBinaryFile("myGraph.gcGraph");
// var roundTrip = MemoryGraph.ReadFromBinaryFile("myGraph.gcGraph");
// OK we have a graph, turn it into a stack source so that I can view it.
MemoryGraphStackSource myStackSource = new MemoryGraphStackSource(myGraph, LogFile);
// Create a Stacks class (which remembers all the Filters, Scaling policy and other things the viewer wants.
Stacks stacks = new Stacks(myStackSource);
// If you wanted to, you can change the filtering ...
stacks.Filter.GroupRegExs = "";
stacks.Filter.MinInclusiveTimePercent = "";
// And view it.
OpenStackViewer(stacks);
}
/// <summary>
/// Reads the Nodes Element
/// </summary>
private static void ReadNodesFromXml(XmlReader reader, MemoryGraph graph)
{
Debug.Assert(reader.NodeType == XmlNodeType.Element);
var inputDepth = reader.Depth;
reader.Read(); // Advance to children
var children = new GrowableArray <NodeIndex>(1000);
var typeStorage = graph.AllocTypeNodeStorage();
while (inputDepth < reader.Depth)
{
if (reader.NodeType == XmlNodeType.Element)
{
switch (reader.Name)
{
case "Node":
{
NodeIndex readNodeIndex = (NodeIndex)FetchInt(reader, "Index", -1);
NodeTypeIndex typeIndex = (NodeTypeIndex)FetchInt(reader, "TypeIndex", -1);
int size = FetchInt(reader, "Size");
if (readNodeIndex == NodeIndex.Invalid)
{
throw new ApplicationException("Node element does not have a Index attribute.");
}
if (typeIndex == NodeTypeIndex.Invalid)
{
throw new ApplicationException("Node element does not have a TypeIndex attribute.");
}
// TODO FIX NOW very inefficient. Use ReadValueChunk and FastStream to make more efficient.
children.Clear();
var body = reader.ReadElementContentAsString();
foreach (var num in Regex.Split(body, @"\s+"))
{
if (num.Length > 0)
{
children.Add((NodeIndex)int.Parse(num));
}
}
if (size == 0)
{
size = graph.GetType(typeIndex, typeStorage).Size;
}
// TODO should probably just reserve node index 0 to be an undefined object?
NodeIndex nodeIndex = 0;
if (readNodeIndex != 0)
{
nodeIndex = graph.CreateNode();
}
if (readNodeIndex != nodeIndex)
{
throw new ApplicationException("Node Indexes do not start at 0 or 1 and increase consecutively.");
}
graph.SetNode(nodeIndex, typeIndex, size, children);
}
break;
default:
Debug.WriteLine("Skipping unknown element {0}", reader.Name);
reader.Skip();
break;
}
}
else if (!reader.Read())
{
break;
}
}
}
void Read(TextReader reader)
{
var framePattern = new Regex(@"\b(\w+?)\!(\S\(?[\S\s]*\)?)");
var stackStart = new Regex(@"Call Site");
// the call stack from the debugger kc command looksl like this
//Call Site
//coreclr!JIT_MonEnterWorker_Portable
//System_Windows_ni!MS.Internal.ManagedPeerTable.TryGetManagedPeer(IntPtr, Boolean, System.Object ByRef)
//System_Windows_ni!MS.Internal.ManagedPeerTable.EnsureManagedPeer(IntPtr, Int32, System.Type, Boolean)
//System_Windows_ni!MS.Internal.FrameworkCallbacks.CheckPeerType(IntPtr, System.String, Boolean)
//System_Windows_ni!DomainBoundILStubClass.IL_STUB_ReversePInvoke(Int32, IntPtr, Int32)
//coreclr!UM2MThunk_WrapperHelper
//coreclr!UMThunkStubWorker
//coreclr!UMThunkStub
//agcore!CParser::StartObjectElement
//agcore!CParser::Attribute
//agcore!CParser::LoadXaml
var stack = new GrowableArray <DebuggerCallStackFrame>();
bool newCallStackFound = false;
var sample = new StackSourceSample(this);
float time = 0;
for (; ;)
{
var line = reader.ReadLine();
if (line == null)
{
break;
}
var match = framePattern.Match(line);
if (match.Success && newCallStackFound)
{
var module = match.Groups[1].Value;
var methodName = match.Groups[2].Value;
// trim the methodName if it has file name info (if the trace is collected with kv instead of kc)
int index = methodName.LastIndexOf(")+");
if (index != -1)
{
methodName = methodName.Substring(0, index + 1);
}
var moduleIndex = Interner.ModuleIntern(module);
var frameIndex = Interner.FrameIntern(methodName, moduleIndex);
DebuggerCallStackFrame frame = new DebuggerCallStackFrame();
frame.frame = frameIndex;
stack.Add(frame);
}
else
{
var stackStartMatch = stackStart.Match(line);
if (stackStartMatch.Success)
{
// start a new sample.
// add the previous sample
// clear the stack
if (stack.Count != 0)
{
StackSourceCallStackIndex parent = StackSourceCallStackIndex.Invalid;
for (int i = stack.Count - 1; i >= 0; --i)
{
parent = Interner.CallStackIntern(stack[i].frame, parent);
}
stack.Clear();
sample.StackIndex = parent;
sample.TimeRelativeMSec = time;
time++;
AddSample(sample);
}
newCallStackFound = true;
}
}
}
Interner.DoneInterning();
}
public void AddSample(LinuxPerfScriptStackSourceSample sample)
{
var baseSample = AddSample((StackSourceSample)sample);
m_LinuxPerfScriptSamples.Add(new LinuxPerfScriptStackSourceSample(baseSample, sample.CpuNumber));
}
/// <summary>
/// After reading the events the graph is not actually created, you need to post process the information we gathered
/// from the events. This is where that happens. Thus 'SetupCallbacks, Process(), ConvertHeapDataToGraph()' is how
/// you dump a heap.
/// </summary>
internal unsafe void ConvertHeapDataToGraph()
{
int maxNodeCount = 10_000_000;
if (m_converted)
{
return;
}
m_converted = true;
if (!m_seenStart)
{
if (m_processName != null)
{
throw new ApplicationException("ETL file did not include a Heap Dump for process " + m_processName);
}
throw new ApplicationException("ETL file did not include a Heap Dump for process ID " + m_processId);
}
if (!m_ignoreEvents)
{
throw new ApplicationException("ETL file shows the start of a heap dump but not its completion.");
}
m_log.WriteLine("Processing Heap Data, BulkTypeEventCount:{0} BulkNodeEventCount:{1} BulkEdgeEventCount:{2}",
m_typeBlocks.Count, m_nodeBlocks.Count, m_edgeBlocks.Count);
// Process the type information (we can't do it on the fly because we need the module information, which may be
// at the end of the trace.
while (m_typeBlocks.Count > 0)
{
GCBulkTypeTraceData data = m_typeBlocks.Dequeue();
for (int i = 0; i < data.Count; i++)
{
GCBulkTypeValues typeData = data.Values(i);
var typeName = typeData.TypeName;
if (IsProjectN)
{
// For project N we only log the type ID and module base address.
Debug.Assert(typeName.Length == 0);
Debug.Assert((typeData.Flags & TypeFlags.ModuleBaseAddress) != 0);
var moduleBaseAddress = typeData.TypeID - (ulong)typeData.TypeNameID; // Tricky way of getting the image base.
Debug.Assert((moduleBaseAddress & 0xFFFF) == 0); // Image loads should be on 64K boundaries.
Module module = GetModuleForImageBase(moduleBaseAddress);
if (module.Path == null)
{
m_log.WriteLine("Error: Could not find DLL name for imageBase 0x{0:x} looking up typeID 0x{1:x} with TypeNameID {2:x}",
moduleBaseAddress, typeData.TypeID, typeData.TypeNameID);
}
m_typeID2TypeIndex[typeData.TypeID] = m_graph.CreateType(typeData.TypeNameID, module);
}
else
{
if (typeName.Length == 0)
{
if ((typeData.Flags & TypeFlags.Array) != 0)
{
typeName = "ArrayType(0x" + typeData.TypeNameID.ToString("x") + ")";
}
else
{
typeName = "Type(0x" + typeData.TypeNameID.ToString("x") + ")";
}
}
// TODO FIX NOW these are kind of hacks
typeName = Regex.Replace(typeName, @"`\d+", "");
typeName = typeName.Replace("[", "<");
typeName = typeName.Replace("]", ">");
typeName = typeName.Replace("<>", "[]");
string moduleName;
if (!m_moduleID2Name.TryGetValue(typeData.ModuleID, out moduleName))
{
moduleName = "Module(0x" + typeData.ModuleID.ToString("x") + ")";
m_moduleID2Name[typeData.ModuleID] = moduleName;
}
// Is this type a an RCW? If so mark the type name that way.
if ((typeData.Flags & TypeFlags.ExternallyImplementedCOMObject) != 0)
{
typeName = "[RCW " + typeName + "]";
}
m_typeID2TypeIndex[typeData.TypeID] = CreateType(typeName, moduleName);
// Trace.WriteLine(string.Format("Type 0x{0:x} = {1}", typeData.TypeID, typeName));
}
}
}
// Process all the ccw root information (which also need the type information complete)
var ccwRoot = m_root.FindOrCreateChild("[COM/WinRT Objects]");
while (m_ccwBlocks.Count > 0)
{
GCBulkRootCCWTraceData data = m_ccwBlocks.Dequeue();
GrowableArray <NodeIndex> ccwChildren = new GrowableArray <NodeIndex>(1);
for (int i = 0; i < data.Count; i++)
{
unsafe
{
GCBulkRootCCWValues ccwInfo = data.Values(i);
// TODO Debug.Assert(ccwInfo.IUnknown != 0);
if (ccwInfo.IUnknown == 0)
{
// TODO currently there are times when a CCWs IUnknown pointer is not set (it is set lazily).
// m_log.WriteLine("Warning seen a CCW with IUnknown == 0");
continue;
}
// Create a CCW node that represents the COM object that has one child that points at the managed object.
var ccwNode = m_graph.GetNodeIndex(ccwInfo.IUnknown);
var ccwTypeIndex = GetTypeIndex(ccwInfo.TypeID, 200);
var ccwType = m_graph.GetType(ccwTypeIndex, m_typeStorage);
var typeName = "[CCW 0x" + ccwInfo.IUnknown.ToString("x") + " for type " + ccwType.Name + "]";
ccwTypeIndex = CreateType(typeName);
ccwChildren.Clear();
ccwChildren.Add(m_graph.GetNodeIndex(ccwInfo.ObjectID));
m_graph.SetNode(ccwNode, ccwTypeIndex, 200, ccwChildren);
ccwRoot.AddChild(ccwNode);
}
}
}
// Process all the static variable root information (which also need the module information complete
var staticVarsRoot = m_root.FindOrCreateChild("[static vars]");
while (m_staticVarBlocks.Count > 0)
{
GCBulkRootStaticVarTraceData data = m_staticVarBlocks.Dequeue();
for (int i = 0; i < data.Count; i++)
{
GCBulkRootStaticVarValues staticVarData = data.Values(i);
var rootToAddTo = staticVarsRoot;
if ((staticVarData.Flags & GCRootStaticVarFlags.ThreadLocal) != 0)
{
rootToAddTo = m_root.FindOrCreateChild("[thread static vars]");
}
// Get the type name.
NodeTypeIndex typeIdx;
string typeName;
if (m_typeID2TypeIndex.TryGetValue(staticVarData.TypeID, out typeIdx))
{
var type = m_graph.GetType(typeIdx, m_typeStorage);
typeName = type.Name;
}
else
{
typeName = "Type(0x" + staticVarData.TypeID.ToString("x") + ")";
}
string fullFieldName = typeName + "." + staticVarData.FieldName;
rootToAddTo = rootToAddTo.FindOrCreateChild("[static var " + fullFieldName + "]");
var nodeIdx = m_graph.GetNodeIndex(staticVarData.ObjectID);
rootToAddTo.AddChild(nodeIdx);
}
}
// var typeStorage = m_graph.AllocTypeNodeStorage();
GCBulkNodeUnsafeNodes nodeStorage = new GCBulkNodeUnsafeNodes();
// Process all the node and edge nodes we have collected.
bool doCompletionCheck = true;
for (; ;)
{
GCBulkNodeUnsafeNodes *node = GetNextNode(&nodeStorage);
if (node == null)
{
break;
}
// Get the node index
var nodeIdx = m_graph.GetNodeIndex((Address)node->Address);
var objSize = (int)node->Size;
Debug.Assert(node->Size < 0x1000000000);
var typeIdx = GetTypeIndex(node->TypeID, objSize);
// TODO FIX NOW REMOVE
// var type = m_graph.GetType(typeIdx, typeStorage);
// Trace.WriteLine(string.Format("Got Object 0x{0:x} Type {1} Size {2} #children {3} nodeIdx {4}", (Address)node->Address, type.Name, objSize, node->EdgeCount, nodeIdx));
// Process the edges (which can add children)
m_children.Clear();
for (int i = 0; i < node->EdgeCount; i++)
{
Address edge = GetNextEdge();
var childIdx = m_graph.GetNodeIndex(edge);
m_children.Add(childIdx);
// Trace.WriteLine(string.Format(" Child 0x{0:x}", edge));
}
// TODO we can use the nodes type to see if this is an RCW before doing this lookup which may be a bit more efficient.
RCWInfo info;
if (m_objectToRCW.TryGetValue((Address)node->Address, out info))
{
// Add the COM object this RCW points at as a child of this node.
m_children.Add(m_graph.GetNodeIndex(info.IUnknown));
// We add 1000 to account for the overhead of the RCW that is NOT on the GC heap.
objSize += 1000;
}
Debug.Assert(!m_graph.IsDefined(nodeIdx));
m_graph.SetNode(nodeIdx, typeIdx, objSize, m_children);
if (m_graph.NodeCount >= maxNodeCount)
{
doCompletionCheck = false;
var userMessage = string.Format("Exceeded max node count {0}", maxNodeCount);
m_log.WriteLine("[WARNING: ]", userMessage);
break;
}
}
if (doCompletionCheck && m_curEdgeBlock != null && m_curEdgeBlock.Count != m_curEdgeIdx)
{
throw new ApplicationException("Error: extra edge data. Giving up on heap dump.");
}
m_root.Build();
m_graph.RootIndex = m_root.Index;
}
private void Read(Stream rawStream)
{
XmlReaderSettings settings = new XmlReaderSettings()
{
IgnoreWhitespace = true, IgnoreComments = true
};
XmlReader reader = XmlTextReader.Create(rawStream, settings);
var stack = new GrowableArray <StackSourceSample>();
bool metricsInclusive = false; // If true, we need to convert them to exclusive as part of processing
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (reader.Name == "node")
{
var sample = new StackSourceSample(this);
string callTree = reader.GetAttribute("call_tree");
// Case for allocation stacks
string sizeStr = reader.GetAttribute("size");
if (sizeStr != null)
{
metricsInclusive = true; // allocation numbers are inclusive
int size = 0;
int.TryParse(sizeStr, out size);
sample.Metric = size;
string recoredObectsStr = reader.GetAttribute("recorded_objects");
int recoredObects = 0;
if (recoredObectsStr != null)
{
int.TryParse(recoredObectsStr, out recoredObects);
}
sample.Count = recoredObects;
}
else
{
Debug.Assert(metricsInclusive == false); // CPU time is exclusive.
// For CPU
string own_time_msStr = reader.GetAttribute("own_time_ms");
if (own_time_msStr != null)
{
int own_time_ms;
int.TryParse(own_time_msStr, out own_time_ms);
sample.Metric = own_time_ms;
string countStr = reader.GetAttribute("count");
int count = 0;
if (countStr != null)
{
int.TryParse(countStr, out count);
}
sample.Count = count;
}
}
// Get the parent stack for this line
var parentStackIndex = StackSourceCallStackIndex.Invalid;
int depth = stack.Count;
if (depth > 0)
{
StackSourceSample parent = stack[depth - 1];
parentStackIndex = parent.StackIndex;
if (metricsInclusive)
{
// The values are inclusive, but StackSoruceSamples are the exclusive amounts, so remove children.
parent.Count -= sample.Count;
parent.Metric -= sample.Metric;
}
}
if (callTree != null)
{
var frameIndex = Interner.FrameIntern(callTree);
sample.StackIndex = Interner.CallStackIntern(frameIndex, parentStackIndex);
}
stack.Add(sample);
}
}
if (reader.NodeType == XmlNodeType.EndElement || reader.IsEmptyElement)
{
if (reader.Name == "node")
{
StackSourceSample sample = stack.Pop();
if ((sample.Count > 0 || sample.Metric > 0) && sample.StackIndex != StackSourceCallStackIndex.Invalid)
{
AddSample(sample);
}
}
}
}
Debug.Assert(stack.Count == 0);
Interner.DoneInterning();
}
void Read(TextReader reader)
{
// TODO this is relatively inefficient.
var regEx = new Regex(@"^\s*(\d+)\s*(\d+)\s*\[\s*(\d+)\s*\]\s*(\S*?)!?(.*)");
var stack = new GrowableArray <WTStackElem>();
WTStackElem elem = new WTStackElem();
long time = 0;
for (; ;)
{
var line = reader.ReadLine();
if (line == null)
{
break;
}
var match = regEx.Match(line);
if (match.Success)
{
int excInstrSoFar = int.Parse(match.Groups[1].Value);
int depth = int.Parse(match.Groups[3].Value);
string module = match.Groups[4].Value;
string method = match.Groups[5].Value;
var moduleIndex = ModuleIntern(module);
var frameIndex = FrameIntern(method, moduleIndex);
var parent = StackSourceCallStackIndex.Invalid;
if (depth > 0)
{
parent = stack[depth - 1].FirstCallStackIndex; // TODO handle out of range
}
var callStackIndex = CallStackIntern(frameIndex, parent);
int extra = stack.Count - depth;
int exclInstr;
if (extra > 0)
{
elem = stack[depth];
if (callStackIndex == elem.CallStackIndex)
{
exclInstr = excInstrSoFar - elem.ExclInstrSoFar;
}
else
{
exclInstr = excInstrSoFar;
elem.CallStackIndex = callStackIndex;
}
Debug.Assert(exclInstr >= 0);
stack.RemoveRange(depth, extra);
}
else
{
elem.CallStackIndex = callStackIndex;
elem.FirstCallStackIndex = callStackIndex;
Debug.Assert(extra == 0);
exclInstr = excInstrSoFar;
}
elem.ExclInstrSoFar = excInstrSoFar;
stack.Add(elem);
time += exclInstr;
var sample = new StackSourceSample(this);
sample.SampleIndex = (StackSourceSampleIndex)m_samples.Count;
sample.Metric = exclInstr;
sample.TimeRelMSec = time - exclInstr;
sample.StackIndex = elem.FirstCallStackIndex;
// Break long sequences of instructions into individual samples. This
// makes timeline work well.
// TODO this bloats the data, not clear if this is the right tradeoff ....
const int maxSize = 20;
while (sample.Metric > maxSize)
{
var subSample = new StackSourceSample(sample);
subSample.Metric = maxSize;
sample.Metric -= maxSize;
sample.TimeRelMSec += maxSize;
m_samples.Add(subSample);
sample.SampleIndex = (StackSourceSampleIndex)m_samples.Count;
}
m_samples.Add(sample);
#if DEBUG
var sampleStr = this.ToString(sample);
Debug.WriteLine(sampleStr);
#endif
}
}
m_sampleTimeRelMSecLimit = time;
CompletedReading();
}
void Read(TextReader reader)
{
// TODO this is relatively inefficient.
var regEx = new Regex(@"^\s*(\d+)\s*(\d+)\s*\[\s*(\d+)\s*\]\s*(\S*?)!?(.*)");
var stack = new GrowableArray <WTStackElem>();
WTStackElem elem = new WTStackElem();
long time = 0;
var sample = new StackSourceSample(this);
for (; ;)
{
var line = reader.ReadLine();
if (line == null)
{
break;
}
var match = regEx.Match(line);
if (match.Success)
{
// Parse the line.
int excInstrSoFar = int.Parse(match.Groups[1].Value);
int depth = int.Parse(match.Groups[3].Value);
string module = match.Groups[4].Value;
string method = match.Groups[5].Value;
// Form the name for this line
var moduleIndex = Interner.ModuleIntern(module);
var frameIndex = Interner.FrameIntern(method, moduleIndex);
// Get the parent stack for this line
var parent = StackSourceCallStackIndex.Invalid;
if (depth > 0)
{
parent = stack[depth - 1].FirstCallStackIndex; // TODO handle out of range
}
// Form the stack for this entry
var callStackIndex = Interner.CallStackIntern(frameIndex, parent);
int exclInstr; // Number of instructions executed on this line
int extra = stack.Count - depth; // The number of frames we need to pop off (including me)
if (extra > 0)
{
// We returned from one or more methods OR we have not left the current method
//
elem = stack[depth];
// We expect to return to the same method we were at at this depth.
if (callStackIndex == elem.CallStackIndex)
{
exclInstr = excInstrSoFar - elem.ExclInstrSoFar; // We are continuing the function
}
else
{
// We are tail-calling to another routine.
exclInstr = excInstrSoFar;
elem.CallStackIndex = callStackIndex;
}
// Pop off all the frames we returned from
Debug.Assert(exclInstr >= 0);
stack.RemoveRange(depth, extra);
}
else
{
// Means we are adding a new frame (we called someone)
Debug.Assert(extra == 0); // We always add only one more frame (e.g. we never go from depth 2 to 4)
elem.CallStackIndex = callStackIndex;
elem.FirstCallStackIndex = callStackIndex;
exclInstr = excInstrSoFar;
}
elem.ExclInstrSoFar = excInstrSoFar;
stack.Add(elem);
time += exclInstr;
sample.Metric = exclInstr;
sample.TimeRelativeMSec = time - exclInstr;
sample.StackIndex = elem.FirstCallStackIndex;
AddSample(sample);
}
}
Interner.DoneInterning();
}
public GCHeapGraph(GCHeap heap)
: base((int)heap.NumberOfObjects)
{
// TODO is basically nodes that have not had 'SetNode' done to them. Thus the node index has been
// allocated, but we have not processed the defintion of the node.
// This list should NEVER contain duplicates (you should test if you already processed the node before
// adding to this queue.
Queue <NodeIndex> toDo = new Queue <NodeIndex>();
// Create the root node.
var root = new MemoryNodeBuilder(this, "[root]");
// Create categories for the roots.
var nodeForKind = new MemoryNodeBuilder[((int)GCRootKind.Max) + 1];
var otherRoots = root.FindOrCreateChild("[other roots]");
nodeForKind[(int)GCRootKind.LocalVar] = otherRoots.FindOrCreateChild("[unknown local vars]");
for (int i = 0; i < nodeForKind.Length; i++)
{
if (nodeForKind[i] == null)
{
nodeForKind[i] = otherRoots.FindOrCreateChild("[" + ((GCRootKind)i).ToString().ToLower() + " handles]");
}
}
var unreachable = root.FindOrCreateChild("[unreachable but not yet collected]");
foreach (var gcRoot in heap.Roots)
{
if (gcRoot.HeapReference == 0)
{
continue;
}
// TODO FIX NOW condition should not be needed, should be able to assert it.
if (!heap.IsInHeap(gcRoot.HeapReference))
{
continue;
}
Debug.Assert(heap.IsInHeap(gcRoot.HeapReference));
// Make a node for it, and notice if the root is already in the heap.
var lastLimit = NodeIndexLimit;
var newNodeIdx = GetNodeIndex(gcRoot.HeapReference);
var nodeForGcRoot = nodeForKind[(int)gcRoot.Kind];
if (gcRoot.Type != null)
{
var prefix = "other";
if (gcRoot.Kind == GCRootKind.StaticVar)
{
prefix = "static";
}
else if (gcRoot.Kind == GCRootKind.LocalVar)
{
prefix = "local";
}
var appDomainNode = root.FindOrCreateChild("[appdomain " + gcRoot.AppDomainName + "]");
var varKindNode = appDomainNode.FindOrCreateChild("[" + prefix + " vars]");
var moduleName = Path.GetFileNameWithoutExtension(gcRoot.Type.ModuleFilePath);
var moduleNode = varKindNode.FindOrCreateChild("[" + prefix + " vars " + moduleName + "]");
var typeNode = moduleNode.FindOrCreateChild("[" + prefix + " vars " + gcRoot.Type.Name + "]");
var name = gcRoot.Type.Name + "+" + gcRoot.Name + " [" + prefix + " var]";
nodeForGcRoot = typeNode.FindOrCreateChild(name, gcRoot.Type.ModuleFilePath);
// TODO REMOVE
// if (nodeForGcRoot.Size == 0)
// nodeForGcRoot.Size = 4;
}
// Give the user a bit more information about runtime internal handles
if (gcRoot.Kind == GCRootKind.Pinning)
{
var pinnedType = heap.GetObjectType(gcRoot.HeapReference);
if (pinnedType.Name == "System.Object []")
{
// Traverse pinned object arrays a bit 'manually' here so we tell the users they are likely handles.
var handleArray = new MemoryNodeBuilder(
this, "[likely runtime object array handle table]", pinnedType.ModuleFilePath, newNodeIdx);
handleArray.Size = pinnedType.GetSize(gcRoot.HeapReference);
nodeForGcRoot.AddChild(handleArray);
pinnedType.EnumerateRefsOfObjectCarefully(gcRoot.HeapReference, delegate(Address childRef, int childFieldOffset)
{
// Poor man's visited bit. If we did not need to add a node, then we have visited it.
var childLastLimit = NodeIndexLimit;
var childNodeIdx = GetNodeIndex(childRef);
if (childNodeIdx < childLastLimit) // Already visited, simply add the child and move one
{
handleArray.AddChild(childNodeIdx);
return;
}
var childType = heap.GetObjectType(childRef);
if (childType.Name == "System.String")
{
// TODO FIX NOW: Only want to morph the name if something else does not point at it.
var literal = new MemoryNodeBuilder(
this, "[likely string literal]", childType.ModuleFilePath, childNodeIdx);
literal.Size = childType.GetSize(childRef);
handleArray.AddChild(literal);
}
else
{
handleArray.AddChild(childNodeIdx);
toDo.Enqueue(childNodeIdx);
}
});
continue; // we are done processing this node.
}
}
nodeForGcRoot.AddChild(newNodeIdx);
if (newNodeIdx >= lastLimit) // have not been visited.
{
toDo.Enqueue(newNodeIdx);
}
}
root.AllocateTypeIndexes();
// Create the necessary types.
int memoryTypesStart = (int)NodeTypeIndexLimit;
foreach (var type in heap.Types)
{
NodeTypeIndex nodeType = CreateType(type.Name, type.ModuleFilePath);
Debug.Assert((int)nodeType == (int)type.Index + memoryTypesStart);
}
var children = new GrowableArray <NodeIndex>();
while (toDo.Count > 0)
{
var nodeIndex = toDo.Dequeue();
var objRef = GetAddress(nodeIndex);
children.Clear();
GCHeapType objType = heap.GetObjectType(objRef);
objType.EnumerateRefsOfObjectCarefully(objRef, delegate(Address childRef, int childFieldOffset)
{
Debug.Assert(heap.IsInHeap(childRef));
var lastLimit = NodeIndexLimit;
var childNodeIdx = GetNodeIndex(childRef);
children.Add(childNodeIdx);
// Poor man's visited bit. If the index we just asked for is a new node, put it in the work queue
if (childNodeIdx >= lastLimit)
{
toDo.Enqueue(childNodeIdx);
}
});
int objSize = objType.GetSize(objRef);
Debug.Assert(objSize > 0);
SetNode(nodeIndex, (NodeTypeIndex)((int)objType.Index + memoryTypesStart), objSize, children);
}
long unreachableSize = (heap.TotalSize - TotalSize);
unreachable.Size = (int)unreachableSize;
if (unreachable.Size != unreachableSize)
{
unreachable.Size = int.MaxValue; // TODO not correct on overflow
}
// We are done!
RootIndex = root.Build();
AllowReading();
}
void Read(TextReader reader)
{
var stack = new GrowableArray <StackSourceCallStackIndex>();
var line = reader.ReadLine(); // Skip the first line, which is column headers.
var sample = new StackSourceSample(this);
for (; ;)
{
line = reader.ReadLine();
if (line == null)
{
break;
}
// 0 1 2 3 4 5 6 7 8
// Order, # of Calls, % Incl Time, % Excl Time, Depth, Function, Module, Incl Time, Excl Time,% Sw. Out, Incl Switched Out, Type, Comments Min Avg Max Excl Switched Out
int idx = 0;
int depth = 0;
string method = null;
string module = null;
int intVal;
long longVal;
for (int col = 0; col <= 8; col++)
{
var newIdx = line.IndexOf('\t', idx);
Debug.Assert(0 < newIdx);
if (newIdx < 0)
{
goto SKIP;
}
switch (col)
{
case 1:
int.TryParse(line.Substring(idx, newIdx - idx), System.Globalization.NumberStyles.Number, null, out intVal);
sample.Count = intVal;
break;
case 4:
int.TryParse(line.Substring(idx, newIdx - idx), System.Globalization.NumberStyles.Number, null, out depth);
break;
case 5:
while (idx < newIdx)
{
if (line[idx] != ' ')
{
break;
}
idx++;
}
method = line.Substring(idx, newIdx - idx);
method = method.Replace((char)0xFFFD, '@'); // They used this character to separate the method name from signature.
break;
case 6:
module = "";
if (depth != 0)
{
module = line.Substring(idx, newIdx - idx);
}
break;
case 8:
long.TryParse(line.Substring(idx, newIdx - idx), System.Globalization.NumberStyles.Number, null, out longVal);
sample.Metric = longVal / 1000000; // TODO what is the metric?
break;
}
idx = newIdx + 1;
}
var moduleIdx = Interner.ModuleIntern(module);
var frameIdx = Interner.FrameIntern(method, moduleIdx);
var prevFrame = StackSourceCallStackIndex.Invalid;
if (0 < depth && depth <= stack.Count)
{
prevFrame = stack[depth - 1];
}
var callStackIdx = Interner.CallStackIntern(frameIdx, prevFrame);
if (depth < stack.Count)
{
stack.Count = depth;
}
stack.Add(callStackIdx);
sample.StackIndex = callStackIdx;
AddSample(sample);
SKIP :;
}
Interner.DoneInterning();
}
