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Add pstacks in gsose and as a .NET Core console application to show m…
…erged threads call stacks a la Visual Studio "Parallel Stacks"
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Christophe Nasarre
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Mar 14, 2019
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,10 @@ | ||
| # pstacks | ||
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| This .NET Core tool allows you to load a .NET application memory dump file and displays the merged threads call stacks à la Visual Studio "Parallel Stacks". | ||
|  | ||
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| If you need to specify the path to the mscordac file, pass it as the second parameter (just after the dump file name) | ||
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| ## Platforms | ||
| As a .NET Core console application, it runs on Windows and Linux. | ||
| Note that it is not possible to attach to a live process on Linux (but could be adapted on Windows is needed) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,205 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using Microsoft.Diagnostics.Runtime; | ||
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| namespace ParallelStacks | ||
| { | ||
| public class ParallelStack | ||
| { | ||
| public static ParallelStack Build(ClrRuntime runtime) | ||
| { | ||
| var ps = new ParallelStack(); | ||
| var stackFrames = new List<ClrStackFrame>(64); | ||
| foreach (var thread in runtime.Threads) | ||
| { | ||
| stackFrames.Clear(); | ||
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| foreach (var stackFrame in thread.StackTrace.Reverse()) | ||
| { | ||
| if (stackFrame.Kind != ClrStackFrameType.ManagedMethod) | ||
| continue; | ||
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| stackFrames.Add(stackFrame); | ||
| } | ||
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| if (stackFrames.Count == 0) | ||
| continue; | ||
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| ps.AddStack(thread.ManagedThreadId, stackFrames.ToArray()); | ||
| } | ||
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| return ps; | ||
| } | ||
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| private bool _useDml; | ||
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| private ParallelStack(ClrStackFrame frame = null) | ||
| { | ||
| Stacks = new List<ParallelStack>(); | ||
| ThreadIds = new List<int>(); | ||
| Frame = (frame == null) ? null : new StackFrame(frame); | ||
| } | ||
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| public List<ParallelStack> Stacks { get; } | ||
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| public StackFrame Frame { get; } | ||
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| public List<int> ThreadIds { get; set; } | ||
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| public void WriteToConsole(bool useDml = false) | ||
| { | ||
| _useDml = useDml; | ||
| WriteStack(this); | ||
| } | ||
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| private const int padding = 5; | ||
| private void WriteStack(ParallelStack stack, int increment = 0) | ||
| { | ||
| var alignment = new string(' ', padding * increment); | ||
| if (stack.Stacks.Count == 0) | ||
| { | ||
| var lastFrame = stack.Frame; | ||
| Console.Write($"{Environment.NewLine}{alignment}"); | ||
| WriteFrameSeparator(" ~~~~"); | ||
| //Console.Write($"{Environment.NewLine}{alignment}{stack.ThreadIds.Count,padding} "); | ||
| WriteCount($"{Environment.NewLine}{alignment}{stack.ThreadIds.Count,padding} "); | ||
| WriteFrame(lastFrame); | ||
| return; | ||
| } | ||
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| foreach (var nextStackFrame in stack.Stacks.OrderBy(s => s.ThreadIds.Count)) | ||
| { | ||
| WriteStack(nextStackFrame, | ||
| (nextStackFrame.ThreadIds.Count == stack.ThreadIds.Count) ? increment : increment + 1); | ||
| } | ||
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| var currentFrame = stack.Frame; | ||
| //Console.Write($"{Environment.NewLine}{alignment}{stack.ThreadIds.Count,padding} "); | ||
| WriteCount($"{Environment.NewLine}{alignment}{stack.ThreadIds.Count,padding} "); | ||
| WriteFrame(currentFrame); | ||
| } | ||
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| private void WriteFrame(StackFrame frame) | ||
| { | ||
| if (!string.IsNullOrEmpty(frame.TypeName)) | ||
| { | ||
| var namespaces = frame.TypeName.Split('.'); | ||
| for (int i = 0; i < namespaces.Length - 1; i++) | ||
| { | ||
| WriteNamespace(namespaces[i]); | ||
| WriteSeparator("."); | ||
| } | ||
| WriteMethodType(namespaces[namespaces.Length - 1]); | ||
| WriteSeparator("."); | ||
| } | ||
|
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| WriteMethod(frame.MethodName); | ||
| WriteSeparator("("); | ||
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| var parameters = frame.Signature; | ||
| for (int current = 0; current < parameters.Count; current++) | ||
| { | ||
| var parameter = parameters[current]; | ||
| // handle byref case | ||
| var pos = parameter.LastIndexOf(" ByRef"); | ||
| if (pos != -1) | ||
| { | ||
| WriteType(parameter.Substring(0, pos)); | ||
| WriteDark(" ByRef"); | ||
| } | ||
| else | ||
| { | ||
| WriteType(parameter); | ||
| } | ||
| if (current < parameters.Count - 1) WriteSeparator(", "); | ||
| } | ||
| WriteSeparator(")"); | ||
| } | ||
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| private void WriteCount(string count) | ||
| { | ||
| if (_useDml) | ||
| { | ||
| Console.Write($"<col fg=\"srcpair\" bg=\"wbg\">{count}</col>"); | ||
| return; | ||
| } | ||
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| WriteWithColor(count, ConsoleColor.Cyan); | ||
| } | ||
| private void WriteNamespace(string ns) | ||
| { | ||
| WriteWithColor(ns, ConsoleColor.DarkCyan); | ||
| } | ||
| private void WriteType(string type) | ||
| { | ||
| WriteWithColor(type, ConsoleColor.Gray); | ||
| } | ||
| private void WriteSeparator(string separator) | ||
| { | ||
| WriteWithColor(separator, ConsoleColor.White); | ||
| } | ||
| private void WriteDark(string separator) | ||
| { | ||
| WriteWithColor(separator, ConsoleColor.DarkGray); | ||
| } | ||
| private void WriteMethod(string method) | ||
| { | ||
| if (_useDml) | ||
| { | ||
| Console.Write($"<col fg=\"srckw\" bg=\"wbg\">{method}</col>"); | ||
| return; | ||
| } | ||
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| WriteWithColor(method, ConsoleColor.Cyan); | ||
| } | ||
| private void WriteMethodType(string type) | ||
| { | ||
| if (_useDml) | ||
| { | ||
| Console.Write($"<b><col fg=\"srckw\" bg=\"wbg\">{type}</col></b>"); | ||
| return; | ||
| } | ||
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| WriteWithColor(type, ConsoleColor.DarkCyan); | ||
| } | ||
| private void WriteFrameSeparator(string text) | ||
| { | ||
| if (_useDml) | ||
| { | ||
| Console.Write($"<b><col fg=\"srcpair\" bg=\"wbg\">{text}</col></b>"); | ||
| return; | ||
| } | ||
|
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| WriteWithColor(text, ConsoleColor.Yellow); | ||
| } | ||
|
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| private void WriteWithColor(string text, ConsoleColor color) | ||
| { | ||
| var current = Console.ForegroundColor; | ||
| Console.ForegroundColor = color; | ||
| Console.Write(text); | ||
| Console.ForegroundColor = current; | ||
| } | ||
|
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| private void AddStack(int threadId, ClrStackFrame[] frames, int index = 0) | ||
| { | ||
| ThreadIds.Add(threadId); | ||
| var firstFrame = frames[index].DisplayString; | ||
| var callstack = Stacks.FirstOrDefault(s => s.Frame.Text == firstFrame); | ||
| if (callstack == null) | ||
| { | ||
| callstack = new ParallelStack(frames[index]); | ||
| Stacks.Add(callstack); | ||
| } | ||
|
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| if (index == frames.Length - 1) | ||
| { | ||
| callstack.ThreadIds.Add(threadId); | ||
| return; | ||
| } | ||
|
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| callstack.AddStack(threadId, frames, index + 1); | ||
| } | ||
| } | ||
| } |
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