gistfile1.txt

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.Runtime.InteropServices;
using System.Text.RegularExpressions;

namespace MailClient.Utils
{
	class MonoProfiling
	{
#if MAC
		public static void Profile(int seconds, string outputPath)
		{
			var outputFilePath = Path.GetTempFileName();
			var startInfo = new ProcessStartInfo("sample");
			startInfo.UseShellExecute = false;
			startInfo.Arguments = $"{Process.GetCurrentProcess().Id} {seconds} -file {outputFilePath}";
			var sampleProcess = Process.Start(startInfo);
			sampleProcess.EnableRaisingEvents = true;
			sampleProcess.Exited += delegate
			{
				ConvertJITAddressesToMethodNames(outputFilePath, "Profile", outputPath);
				File.Delete(outputFilePath);
			};
		}

		[DllImport("__Internal")]
		extern static string mono_pmip(long offset);
		static Dictionary<long, string> methodsCache = new Dictionary<long, string>();

		static void ConvertJITAddressesToMethodNames(string fileName, string profilingType, string outputPath)
		{
			var rx = new Regex(@"\?\?\?  \(in <unknown binary>\)  \[0x([0-9a-f]+)\]", RegexOptions.Compiled);
			if (File.Exists(fileName) && new FileInfo(fileName).Length > 0)
			{
				Directory.CreateDirectory(outputPath);
				var outputFilename = Path.Combine(outputPath, $"{profilingType}_{DateTime.Now:yyyy-MM-dd__HH-mm-ss}.txt");
				using (var sr = new StreamReader(fileName))
				using (var sw = new StreamWriter(outputFilename))
				{
					string line;
					while ((line = sr.ReadLine()) != null)
					{
						if (rx.IsMatch(line))
						{
							var match = rx.Match(line);
							var offset = long.Parse(match.Groups[1].Value, NumberStyles.HexNumber);
							string pmipMethodName;
							if (!methodsCache.TryGetValue(offset, out pmipMethodName))
							{
								pmipMethodName = mono_pmip(offset)?.TrimStart();
								methodsCache.Add(offset, pmipMethodName);
							}
							if (pmipMethodName != null)
							{
								line = line.Remove(match.Index, match.Length);
								line = line.Insert(match.Index, pmipMethodName);
							}
						}
						sw.WriteLine(line);
					}
				}
			}
		}
#endif
	}
}