private void HeapViewer_FormClosed(object sender, FormClosedEventArgs e)
{
Dispose();
Snapshot.Info.ReleaseStrongReference();
Timeline.Items = new List <HeapSnapshotInfo>();
LayoutView.Snapshot = Snapshot = null;
}
public void ReleaseStrongReference()
{
if (_StrongRef != null)
{
_WeakRef = new WeakReference(_StrongRef);
}
_StrongRef = null;
}
protected void AddSnapshot(HeapSnapshot snapshot)
{
Snapshots.Add(snapshot.Info);
// Resort the loaded snapshots, since it's possible for the user to load
// a subset of a full capture, or load snapshots in the wrong order
Snapshots.Sort((lhs, rhs) => lhs.Timestamp.CompareTo(rhs.Timestamp));
OnSnapshotsChanged();
}
internal void SetSnapshot(HeapSnapshot heapSnapshot)
{
var oldSnapshot = Snapshot;
if (oldSnapshot != null)
{
throw new InvalidOperationException();
}
_StrongRef = heapSnapshot;
_WeakRef = null;
}
public IEnumerator <object> Build(
HeapSnapshot snapshot,
Dictionary <uint, HeapSnapshot.Traceback> tracebacks,
Dictionary <uint, TracebackFrame> symbols
)
{
var allocations = from heap in snapshot.Heaps
from allocation in heap.Allocations
select allocation;
yield return(Future.RunInThread(() => {
Parallel.ForEach(
allocations, (alloc) => {
StackGraphNode parent = null, node;
var traceback = tracebacks[alloc.TracebackID];
foreach (var frameId in traceback.Reverse())
{
var frame = symbols[frameId];
if (parent != null)
{
node = parent.GetNodeForChildFrame(frame);
}
else
{
node = GetNodeForFrame(frame);
}
if (node != null)
{
node.Visit(alloc);
}
if (node != null)
{
parent = node;
}
node = Functions.GetNodeForFrame(frame);
node.Visit(alloc);
}
}
);
}));
yield return(FinalizeBuild());
}
protected static IEnumerable <VisibleHeap> WalkHeaps(
HeapSnapshot snapshot, int scrollOffsetInRows,
int bytesPerRow, int contentWidth
)
{
int rowY = -scrollOffsetInRows;
foreach (var heapId in snapshot.Heaps.Keys)
{
var heap = snapshot.Heaps[heapId];
var itemHeight = ComputeHeapHeightInRows(heap, bytesPerRow);
yield return(new VisibleHeap(
heap, rowY, itemHeight
));
rowY += itemHeight;
}
}
private IEnumerator <object> SetCurrentSnapshot(HeapSnapshotInfo info)
{
var oldSnapshot = Snapshot;
if (oldSnapshot != null)
{
oldSnapshot.Info.ReleaseStrongReference();
}
using (Finally.Do(() => {
UseWaitCursor = false;
})) {
var fSnapshot = Instance.GetSnapshot(info);
yield return(fSnapshot);
Snapshot = fSnapshot.Result;
RefreshHeap();
}
}
protected IEnumerator <object> ResolveSymbolsForSnapshot(HeapSnapshot snapshot)
{
TracebackFrame tf;
Future <TracebackFrame> ftf;
SymbolResolveState.Count = 0;
yield return(Future.RunInThread(() => {
for (int i = 0, c = snapshot.Tracebacks.Count; i < c; i++)
{
var traceback = snapshot.Tracebacks[i];
lock (SymbolResolveLock)
foreach (var frame in traceback)
{
ResolveFrame(frame, out tf, out ftf);
}
}
}));
}
private IEnumerator <object> FinishLoadingSnapshotEpilogue(HeapSnapshot snapshot)
{
AddSnapshot(snapshot);
foreach (var module in snapshot.Modules)
{
SymbolModules.Add(module);
}
yield return(new Start(
ResolveSymbolsForSnapshot(snapshot),
TaskExecutionPolicy.RunAsBackgroundTask
));
if (!snapshot.SavedToDatabase)
{
yield return(snapshot.SaveToDatabase(Database));
}
Interlocked.Increment(ref SnapshotLoadState.Count);
}
public HeapSnapshotInfo(
int index, DateTime timestamp, string filename,
MemoryStatistics memory, HeapSnapshot snapshot
) : base(
(from heap in snapshot.Heaps select(from alloc in heap.Allocations select(long) alloc.Size).Sum()).Sum(),
(from heap in snapshot.Heaps select(from alloc in heap.Allocations select(long) alloc.Overhead).Sum()).Sum(),
(from heap in snapshot.Heaps select(from alloc in heap.Allocations select(long)(alloc.Size + alloc.Overhead)).Sum()).Sum(),
(from heap in snapshot.Heaps select heap.Allocations.Count).Sum()
)
{
Index = index;
Timestamp = timestamp;
Filename = filename;
Memory = memory;
_StrongRef = snapshot;
HeapFragmentation = (from heap in snapshot.Heaps select heap.Info.EmptySpans).Sum() / (float)Math.Max(1, (from heap in snapshot.Heaps select heap.Allocations.Count).Sum());
LargestFreeHeapBlock = (from heap in snapshot.Heaps select heap.Info.LargestFreeSpan).Max();
LargestOccupiedHeapBlock = (from heap in snapshot.Heaps select heap.Info.LargestOccupiedSpan).Max();
AverageFreeBlockSize = (long)(from heap in snapshot.Heaps select(heap.Info.EstimatedFree) / Math.Max(heap.Info.EmptySpans, 1)).Average();
AverageOccupiedBlockSize = (long)(from heap in snapshot.Heaps select(heap.Info.TotalOverhead + heap.Info.TotalRequested) / Math.Max(heap.Info.OccupiedSpans, 1)).Average();
}
protected HeapSnapshotInfo(
int index, DateTime timestamp, string filename, MemoryStatistics memory,
float heapFragmentation, long largestFreeHeapBlock, long largestOccupiedHeapBlock,
long averageFreeBlockSize, long averageOccupiedBlockSize,
long bytesAllocated, long bytesOverhead, long bytesTotal,
int allocationCount
) : base(
bytesAllocated, bytesOverhead, bytesTotal, allocationCount
)
{
Index = index;
Timestamp = timestamp;
Filename = filename;
Memory = memory;
HeapFragmentation = heapFragmentation;
LargestFreeHeapBlock = largestFreeHeapBlock;
LargestOccupiedHeapBlock = largestOccupiedHeapBlock;
AverageFreeBlockSize = averageFreeBlockSize;
AverageOccupiedBlockSize = averageOccupiedBlockSize;
_StrongRef = null;
_WeakRef = null;
}
protected IEnumerator <object> LoadSnapshotFromDatabase(HeapSnapshotInfo info)
{
var result = new HeapSnapshot(info);
var fModules = Database.SnapshotModules.Get(info.Index);
var fHeaps = Database.SnapshotHeaps.Get(info.Index);
using (fModules)
yield return(fModules);
var fModuleInfos = Database.Modules.Select(
from moduleName in fModules.Result select moduleName
);
using (fModuleInfos)
yield return(fModuleInfos);
foreach (var module in fModuleInfos.Result)
{
result.Modules.Add(module);
}
using (fHeaps)
yield return(fHeaps);
var heapIDs = from heap in fHeaps.Result select heap.HeapID;
var fAllocations = Database.HeapAllocations.Select(heapIDs);
using (fAllocations)
yield return(fAllocations);
var allocations = SequenceUtils.ToDictionary(heapIDs, fAllocations.Result);
var tracebackIDs = new HashSet <UInt32>();
foreach (var heapInfo in fHeaps.Result)
{
var theHeap = new HeapSnapshot.Heap(heapInfo);
var allocationIds = allocations[heapInfo.HeapID];
theHeap.Allocations.Capacity = allocationIds.Length;
var fRanges = Database.Allocations.Select(allocationIds);
using (fRanges)
yield return(fRanges);
yield return(Future.RunInThread(() =>
SequenceUtils.Zip(
allocationIds, fRanges.Result, (id, ranges) => {
HeapSnapshot.AllocationRanges.Range range;
if (ranges.Get(info.Index, out range))
{
theHeap.Allocations.Add(new HeapSnapshot.Allocation(
id, range.Size, range.Overhead, range.TracebackID
));
tracebackIDs.Add(range.TracebackID);
}
}
)
));
result.Heaps.Add(theHeap);
}
var fTracebacks = Database.Tracebacks.Select(tracebackIDs);
using (fTracebacks)
yield return(fTracebacks);
yield return(Future.RunInThread(() => {
foreach (var traceback in fTracebacks.Result)
{
result.Tracebacks.Add(traceback);
}
}));
yield return(Result.New(result));
}
