protected IEnumerator<object> SnapshotIOTask() { ActivityIndicator.Item progress = null; IFuture previousSnapshot = null; while (true) { if ((SnapshotLoadQueue.Count <= 0) && (previousSnapshot != null)) yield return previousSnapshot; if (SnapshotLoadQueue.Count <= 0) { SnapshotLoadState.Count = 0; if (progress != null) { progress.Dispose(); progress = null; } } var f = SnapshotLoadQueue.Dequeue(); using (f) yield return f; var filename = f.Result; if (progress == null) progress = Activities.AddItem("Loading snapshots"); using (var fda = new FileDataAdapter( filename, FileMode.Open, FileAccess.Read, FileShare.Read, 1024 * 128 )) { var maximum = SnapshotLoadState.Count + Math.Max(0, SnapshotLoadQueue.Count) + 1; progress.Maximum = maximum; progress.Progress = Math.Min(maximum, SnapshotLoadState.Count); var fBytes = fda.ReadToEnd(); yield return fBytes; var fText = Future.RunInThread( () => Encoding.ASCII.GetString(fBytes.Result) ); yield return fText; var text = fText.Result; fBytes = null; fText = null; // Wait for the last snapshot load we triggered to finish if (previousSnapshot != null) yield return previousSnapshot; previousSnapshot = Scheduler.Start( FinishLoadingSnapshot(filename, text), TaskExecutionPolicy.RunAsBackgroundTask ); text = null; } } }
public static IEnumerator<object> FromFile(string filename, IProgressListener progress) { progress.Status = "Loading diff..."; Future<string> fText; // We could stream the lines in from the IO thread while we parse them, but this // part of the load is usually pretty quick even on a regular hard disk, and // loading the whole diff at once eliminates some context switches using (var fda = new FileDataAdapter( filename, FileMode.Open, FileAccess.Read, FileShare.Read, 1024 * 128 )) { var fBytes = fda.ReadToEnd(); yield return fBytes; fText = Future.RunInThread( () => Encoding.ASCII.GetString(fBytes.Result) ); yield return fText; } yield return fText; var lr = new LineReader(fText.Result); LineReader.Line line; progress.Status = "Parsing diff..."; var frames = new List<TracebackFrame>(); var moduleNames = new NameTable(StringComparer.Ordinal); var symbolTypes = new NameTable(StringComparer.Ordinal); var functionNames = new NameTable(StringComparer.Ordinal); var deltas = new List<DeltaInfo>(); var tracebacks = new Dictionary<UInt32, TracebackInfo>(); var regexes = new Regexes(); // Regex.Groups[string] does an inefficient lookup, so we do that lookup once here int groupModule = regexes.DiffModule.GroupNumberFromName("module"); int groupSymbolType = regexes.DiffModule.GroupNumberFromName("symbol_type"); int groupTraceId = regexes.BytesDelta.GroupNumberFromName("trace_id"); int groupType = regexes.BytesDelta.GroupNumberFromName("type"); int groupDeltaBytes = regexes.BytesDelta.GroupNumberFromName("delta_bytes"); int groupNewBytes = regexes.BytesDelta.GroupNumberFromName("new_bytes"); int groupOldBytes = regexes.BytesDelta.GroupNumberFromName("old_bytes"); int groupNewCount = regexes.BytesDelta.GroupNumberFromName("new_count"); int groupOldCount = regexes.CountDelta.GroupNumberFromName("old_count"); int groupCountDelta = regexes.CountDelta.GroupNumberFromName("delta_count"); int groupTracebackModule = regexes.TracebackFrame.GroupNumberFromName("module"); int groupTracebackFunction = regexes.TracebackFrame.GroupNumberFromName("function"); int groupTracebackOffset = regexes.TracebackFrame.GroupNumberFromName("offset"); int groupTracebackOffset2 = regexes.TracebackFrame.GroupNumberFromName("offset2"); int groupTracebackPath = regexes.TracebackFrame.GroupNumberFromName("path"); int groupTracebackLine = regexes.TracebackFrame.GroupNumberFromName("line"); int i = 0; while (lr.ReadLine(out line)) { if (i % ProgressInterval == 0) { progress.Maximum = lr.Length; progress.Progress = lr.Position; // Suspend processing until any messages in the windows message queue have been processed yield return new Yield(); } retryFromHere: Match m; if (regexes.DiffModule.TryMatch(ref line, out m)) { moduleNames.Add(m.Groups[groupModule].Value); } else if (regexes.BytesDelta.TryMatch(ref line, out m)) { var traceId = UInt32.Parse(m.Groups[groupTraceId].Value, NumberStyles.HexNumber); var info = new DeltaInfo { Added = (m.Groups[groupType].Value == "+"), BytesDelta = int.Parse(m.Groups[groupDeltaBytes].Value, NumberStyles.HexNumber), NewBytes = int.Parse(m.Groups[groupNewBytes].Value, NumberStyles.HexNumber), OldBytes = int.Parse(m.Groups[groupOldBytes].Value, NumberStyles.HexNumber), NewCount = int.Parse(m.Groups[groupNewCount].Value, NumberStyles.HexNumber), }; if (lr.ReadLine(out line)) { if (regexes.CountDelta.TryMatch(ref line, out m)) { info.OldCount = int.Parse(m.Groups[groupOldCount].Value, NumberStyles.HexNumber); info.CountDelta = int.Parse(m.Groups[groupCountDelta].Value, NumberStyles.HexNumber); } } bool readingLeadingWhitespace = true, doRetry = false; frames.Clear(); var itemModules = new NameTable(StringComparer.Ordinal); var itemFunctions = new NameTable(StringComparer.Ordinal); while (lr.ReadLine(out line)) { if (line.ToString().Trim().Length == 0) { if (readingLeadingWhitespace) continue; else break; } else if (regexes.TracebackFrame.TryMatch(ref line, out m)) { readingLeadingWhitespace = false; var moduleName = moduleNames[m.Groups[groupTracebackModule].Value]; itemModules.Add(moduleName); var functionName = functionNames[m.Groups[groupTracebackFunction].Value]; itemFunctions.Add(functionName); var frame = new TracebackFrame { Module = moduleName, Function = functionName, Offset = UInt32.Parse(m.Groups[groupTracebackOffset].Value, NumberStyles.HexNumber) }; if (m.Groups[groupTracebackOffset2].Success) frame.Offset2 = UInt32.Parse(m.Groups[groupTracebackOffset2].Value, NumberStyles.HexNumber); if (m.Groups[groupTracebackPath].Success) frame.SourceFile = m.Groups[groupTracebackPath].Value; if (m.Groups[groupTracebackLine].Success) frame.SourceLine = int.Parse(m.Groups[groupTracebackLine].Value); frames.Add(frame); } else { // We hit the beginning of a new allocation, so make sure it gets parsed doRetry = true; break; } } if (tracebacks.ContainsKey(traceId)) { info.Traceback = tracebacks[traceId]; Console.WriteLine("Duplicate traceback for id {0}!", traceId); } else { var frameArray = ImmutableArrayPool<TracebackFrame>.Allocate(frames.Count); frames.CopyTo(frameArray.Array, frameArray.Offset); info.Traceback = tracebacks[traceId] = new TracebackInfo { TraceId = traceId, Frames = frameArray, Modules = itemModules, Functions = itemFunctions }; } deltas.Add(info); if (doRetry) goto retryFromHere; } else if (line.StartsWith("//")) { // Comment, ignore it } else if (line.StartsWith("Total increase") || line.StartsWith("Total decrease")) { // Ignore this too } else if (line.StartsWith(" ") && (line.EndsWith(".pdb"))) { // Symbol path for a module, ignore it } else { Console.WriteLine("Unrecognized diff content: {0}", line.ToString()); } } var result = new HeapDiff( filename, moduleNames, functionNames, deltas, tracebacks ); yield return new Result(result); }