pass config from runner => executor => diagnoser #412

src/BenchmarkDotNet.Core/Diagnosers/CompositeDiagnoser.cs

@@ -22,14 +22,14 @@ namespace BenchmarkDotNet.Diagnosers
         public IColumnProvider GetColumnProvider() 
             => new CompositeColumnProvider(diagnosers.Select(d => d.GetColumnProvider()).ToArray());
 
-        public void BeforeAnythingElse(Process process, Benchmark benchmark) 
+        public void BeforeAnythingElse(DiagnoserActionParameters parameters) 
-            => diagnosers.ForEach(diagnoser => diagnoser.BeforeAnythingElse(process, benchmark));
+            => diagnosers.ForEach(diagnoser => diagnoser.BeforeAnythingElse(parameters));
 
-        public void AfterSetup(Process process, Benchmark benchmark) 
+        public void AfterSetup(DiagnoserActionParameters parameters) 
-            => diagnosers.ForEach(diagnoser => diagnoser.AfterSetup(process, benchmark));
+            => diagnosers.ForEach(diagnoser => diagnoser.AfterSetup(parameters));
 
-        public void BeforeMainRun(Process process, Benchmark benchmark) 
+        public void BeforeMainRun(DiagnoserActionParameters parameters) 
-            => diagnosers.ForEach(diagnoser => diagnoser.BeforeMainRun(process, benchmark));
+            => diagnosers.ForEach(diagnoser => diagnoser.BeforeMainRun(parameters));
 
         public void BeforeCleanup() => diagnosers.ForEach(diagnoser => diagnoser.BeforeCleanup());
 

src/BenchmarkDotNet.Core/Diagnosers/DiagnoserActionParameters.cs

@@ -0,0 +1,22 @@
+using System.Diagnostics;
+using BenchmarkDotNet.Configs;
+using BenchmarkDotNet.Running;
+
+namespace BenchmarkDotNet.Diagnosers
+{
+    public class DiagnoserActionParameters
+    {
+        public DiagnoserActionParameters(Process process, Benchmark benchmark, IConfig config)
+        {
+            Process = process;
+            Benchmark = benchmark;
+            Config = config;
+        }
+
+        public Process Process { get; }
+
+        public Benchmark Benchmark { get; }
+
+        public IConfig Config { get; }
+    }
+}

src/BenchmarkDotNet.Core/Diagnosers/IDiagnoser.cs

@@ -1,5 +1,4 @@
 using System.Collections.Generic;
-using System.Diagnostics;
 using BenchmarkDotNet.Columns;
 using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Running;
@@ -15,17 +14,17 @@ namespace BenchmarkDotNet.Diagnosers
         /// <summary>
         /// before jitting, warmup
         /// </summary>
-        void BeforeAnythingElse(Process process, Benchmark benchmark);
+        void BeforeAnythingElse(DiagnoserActionParameters parameters);
 
         /// <summary>
         /// after setup, before run
         /// </summary>
-        void AfterSetup(Process process, Benchmark benchmark);
+        void AfterSetup(DiagnoserActionParameters parameters);
 
         /// <summary>
         /// after setup, warmup and pilot but before the main run
         /// </summary>
-        void BeforeMainRun(Process process, Benchmark benchmark);
+        void BeforeMainRun(DiagnoserActionParameters parameters);
 
         /// <summary>
         /// after run, before cleanup

src/BenchmarkDotNet.Core/Diagnosers/MemoryDiagnoser.cs

@@ -30,9 +30,9 @@ namespace BenchmarkDotNet.Diagnosers
 
         // the following methods are left empty on purpose
         // the action takes places in other process, and the values are gathered by Engine
-        public void BeforeAnythingElse(Process process, Benchmark benchmark) { }
+        public void BeforeAnythingElse(DiagnoserActionParameters _) { }
-        public void AfterSetup(Process process, Benchmark benchmark) { }
+        public void AfterSetup(DiagnoserActionParameters _) { }
-        public void BeforeMainRun(Process process, Benchmark benchmark) { }
+        public void BeforeMainRun(DiagnoserActionParameters _) { }
         public void BeforeCleanup() { }
 
         public void DisplayResults(ILogger logger)

src/BenchmarkDotNet.Core/Loggers/NullLogger.cs

@@ -0,0 +1,15 @@
+namespace BenchmarkDotNet.Loggers
+{
+    public class NullLogger : ILogger
+    {
+        public static readonly ILogger Instance = new NullLogger();
+
+        private NullLogger() { }
+
+        public void Write(LogKind logKind, string text) { }
+
+        public void WriteLine() { }
+
+        public void WriteLine(LogKind logKind, string text) { }
+    }
+}

src/BenchmarkDotNet.Core/Loggers/SynchronousProcessOutputLoggerWithDiagnoser.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Diagnosers;
 using BenchmarkDotNet.Engines;
 using BenchmarkDotNet.Running;
@@ -13,8 +14,9 @@ namespace BenchmarkDotNet.Loggers
         private readonly Process process;
         private readonly Benchmark benchmark;
         private readonly IDiagnoser diagnoser;
+        private readonly DiagnoserActionParameters diagnoserActionParameters;
 
-        public SynchronousProcessOutputLoggerWithDiagnoser(ILogger logger, Process process, IDiagnoser diagnoser, Benchmark benchmark)
+        public SynchronousProcessOutputLoggerWithDiagnoser(ILogger logger, Process process, IDiagnoser diagnoser, Benchmark benchmark, IConfig config)
         {
             if (!process.StartInfo.RedirectStandardOutput)
             {
@@ -25,6 +27,10 @@ namespace BenchmarkDotNet.Loggers
             this.process = process;
             this.diagnoser = diagnoser;
             this.benchmark = benchmark;
+            diagnoserActionParameters = new DiagnoserActionParameters(
+                process,
+                benchmark,
+                config);
 
             LinesWithResults = new List<string>();
             LinesWithExtraOutput = new List<string>();
@@ -50,15 +56,15 @@ namespace BenchmarkDotNet.Loggers
                 }
                 else if (line == Engine.Signals.BeforeAnythingElse)
                 {
-                    diagnoser?.BeforeAnythingElse(process, benchmark);
+                    diagnoser?.BeforeAnythingElse(diagnoserActionParameters);
                 }
                 else if (line == Engine.Signals.AfterSetup)
                 {
-                    diagnoser?.AfterSetup(process, benchmark);
+                    diagnoser?.AfterSetup(diagnoserActionParameters);
                 }
                 else if (line == Engine.Signals.BeforeMainRun)
                 {
-                    diagnoser?.BeforeMainRun(process, benchmark);
+                    diagnoser?.BeforeMainRun(diagnoserActionParameters);
                 }
                 else if (line == Engine.Signals.BeforeCleanup)
                 {

src/BenchmarkDotNet.Core/Running/BenchmarkRunnerCore.cs

@@ -15,6 +15,7 @@ using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Mathematics;
 using BenchmarkDotNet.Reports;
 using BenchmarkDotNet.Toolchains;
+using BenchmarkDotNet.Toolchains.Parameters;
 using BenchmarkDotNet.Toolchains.Results;
 using BenchmarkDotNet.Validators;
 
@@ -247,7 +248,8 @@ namespace BenchmarkDotNet.Running
                     : " / " + launchCount;
                 logger.WriteLineInfo($"// Launch: {launchIndex + 1}{printedLaunchCount}");
 
-                var executeResult = toolchain.Executor.Execute(buildResult, benchmark, logger, resolver);
+                var executeResult = toolchain.Executor.Execute(
+                    new ExecuteParameters(buildResult, benchmark, logger, resolver, config));
 
                 if (!executeResult.FoundExecutable)
                     logger.WriteLineError($"Executable {buildResult.ArtifactsPaths.ExecutablePath} not found");
@@ -285,7 +287,8 @@ namespace BenchmarkDotNet.Running
                 logger.WriteLineInfo("// Run, Diagnostic");
                 var compositeDiagnoser = config.GetCompositeDiagnoser();
 
-                var executeResult = toolchain.Executor.Execute(buildResult, benchmark, logger, resolver, compositeDiagnoser);
+                var executeResult = toolchain.Executor.Execute(
+                    new ExecuteParameters(buildResult, benchmark, logger, resolver, config, compositeDiagnoser));
 
                 var allRuns = executeResult.Data.Select(line => Measurement.Parse(logger, line, 0)).Where(r => r.IterationMode != IterationMode.Unknown).ToList();
                 gcStats = GcStats.Parse(executeResult.Data.Last());

src/BenchmarkDotNet.Core/Toolchains/DotNetCli/DotNetCliExecutor.cs

@@ -3,12 +3,14 @@ using System.Diagnostics;
 using System.IO;
 using System.Text;
 using BenchmarkDotNet.Characteristics;
+using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Diagnosers;
 using BenchmarkDotNet.Engines;
 using BenchmarkDotNet.Extensions;
 using BenchmarkDotNet.Jobs;
 using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Running;
+using BenchmarkDotNet.Toolchains.Parameters;
 using BenchmarkDotNet.Toolchains.Results;
 using JetBrains.Annotations;
 
@@ -17,23 +19,29 @@ namespace BenchmarkDotNet.Toolchains.DotNetCli
     [PublicAPI]
     public class DotNetCliExecutor : IExecutor
     {
-        public ExecuteResult Execute(BuildResult buildResult, Benchmark benchmark, ILogger logger, IResolver resolver, IDiagnoser diagnoser = null)
+        public ExecuteResult Execute(ExecuteParameters executeParameters)
         {
-            var executableName = $"{buildResult.ArtifactsPaths.ProgramName}.dll";
+            var executableName = $"{executeParameters.BuildResult.ArtifactsPaths.ProgramName}.dll";
-            if (!File.Exists(Path.Combine(buildResult.ArtifactsPaths.BinariesDirectoryPath, executableName)))
+            if (!File.Exists(Path.Combine(executeParameters.BuildResult.ArtifactsPaths.BinariesDirectoryPath, executableName)))
             {
-                logger.WriteLineError($"Did not find {executableName} in {buildResult.ArtifactsPaths.BinariesDirectoryPath}, but the folder contained:");
+                executeParameters.Logger.WriteLineError($"Did not find {executableName} in {executeParameters.BuildResult.ArtifactsPaths.BinariesDirectoryPath}, but the folder contained:");
-                foreach (var file in new DirectoryInfo(buildResult.ArtifactsPaths.BinariesDirectoryPath).GetFiles("*.*"))
+                foreach (var file in new DirectoryInfo(executeParameters.BuildResult.ArtifactsPaths.BinariesDirectoryPath).GetFiles("*.*"))
-                    logger.WriteLineError(file.Name);
+                    executeParameters.Logger.WriteLineError(file.Name);
                 
                 return new ExecuteResult(false, -1, Array.Empty<string>(), Array.Empty<string>());
             }
 
-            ConsoleHandler.EnsureInitialized(logger);
+            ConsoleHandler.EnsureInitialized(executeParameters.Logger);
 
             try
             {
-                return Execute(benchmark, logger, buildResult.ArtifactsPaths, diagnoser, executableName);
+                return Execute(
+                    executeParameters.Benchmark, 
+                    executeParameters.Logger, 
+                    executeParameters.BuildResult.ArtifactsPaths, 
+                    executeParameters.Diagnoser, 
+                    executableName, 
+                    executeParameters.Config);
             }
             finally
             {
@@ -41,7 +49,7 @@ namespace BenchmarkDotNet.Toolchains.DotNetCli
             }
         }
 
-        private ExecuteResult Execute(Benchmark benchmark, ILogger logger, ArtifactsPaths artifactsPaths, IDiagnoser diagnoser, string executableName)
+        private ExecuteResult Execute(Benchmark benchmark, ILogger logger, ArtifactsPaths artifactsPaths, IDiagnoser diagnoser, string executableName, IConfig config)
         {
             using (var process = new Process
             {
@@ -50,7 +58,7 @@ namespace BenchmarkDotNet.Toolchains.DotNetCli
                     BuildArgs(diagnoser, executableName))
             })
             {
-                var loggerWithDiagnoser = new SynchronousProcessOutputLoggerWithDiagnoser(logger, process, diagnoser, benchmark);
+                var loggerWithDiagnoser = new SynchronousProcessOutputLoggerWithDiagnoser(logger, process, diagnoser, benchmark, config);
 
                 ConsoleHandler.Instance.SetProcess(process);
 

src/BenchmarkDotNet.Core/Toolchains/Executor.cs

@@ -4,6 +4,7 @@ using System.IO;
 using System.Linq;
 using System.Text;
 using BenchmarkDotNet.Characteristics;
+using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Diagnosers;
 using BenchmarkDotNet.Engines;
 using BenchmarkDotNet.Environments;
@@ -12,6 +13,7 @@ using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Jobs;
 using BenchmarkDotNet.Portability;
 using BenchmarkDotNet.Running;
+using BenchmarkDotNet.Toolchains.Parameters;
 using BenchmarkDotNet.Toolchains.Results;
 using JetBrains.Annotations;
 
@@ -20,21 +22,20 @@ namespace BenchmarkDotNet.Toolchains
     [PublicAPI("Used by some of our Superusers that implement their own Toolchains (e.g. Kestrel team)")]
     public class Executor : IExecutor
     {
-        public ExecuteResult Execute(BuildResult buildResult, Benchmark benchmark, ILogger logger, IResolver resolver, IDiagnoser compositeDiagnoser = null)
+        public ExecuteResult Execute(ExecuteParameters executeParameters)
         {
-            var exePath = buildResult.ArtifactsPaths.ExecutablePath;
+            var exePath = executeParameters.BuildResult.ArtifactsPaths.ExecutablePath;
-            var args = compositeDiagnoser == null ? string.Empty : Engine.Signals.DiagnoserIsAttachedParam;
+            var args = executeParameters.Diagnoser == null ? string.Empty : Engine.Signals.DiagnoserIsAttachedParam;
 
             if (!File.Exists(exePath))
             {
                 return new ExecuteResult(false, -1, Array.Empty<string>(), Array.Empty<string>());
             }
 
-            return Execute(benchmark, logger, exePath, null, args, compositeDiagnoser, resolver);
+            return Execute(executeParameters.Benchmark, executeParameters.Logger, exePath, null, args, executeParameters.Diagnoser, executeParameters.Resolver, executeParameters.Config);
         }
 
-        private ExecuteResult Execute(Benchmark benchmark, ILogger logger, string exePath, string workingDirectory, string args, IDiagnoser diagnoser,
+        private ExecuteResult Execute(Benchmark benchmark, ILogger logger, string exePath, string workingDirectory, string args, IDiagnoser diagnoser, IResolver resolver, IConfig config)
-            IResolver resolver)
         {
             ConsoleHandler.EnsureInitialized(logger);
 
@@ -42,7 +43,7 @@ namespace BenchmarkDotNet.Toolchains
             {
                 using (var process = new Process { StartInfo = CreateStartInfo(benchmark, exePath, args, workingDirectory, resolver) })
                 {
-                    var loggerWithDiagnoser = new SynchronousProcessOutputLoggerWithDiagnoser(logger, process, diagnoser, benchmark);
+                    var loggerWithDiagnoser = new SynchronousProcessOutputLoggerWithDiagnoser(logger, process, diagnoser, benchmark, config);
                     
                     return Execute(process, benchmark, loggerWithDiagnoser, logger);
                 }

src/BenchmarkDotNet.Core/Toolchains/IExecutor.cs

@@ -1,13 +1,10 @@
-using BenchmarkDotNet.Characteristics;
+using BenchmarkDotNet.Toolchains.Parameters;
-using BenchmarkDotNet.Diagnosers;
-using BenchmarkDotNet.Loggers;
-using BenchmarkDotNet.Running;
 using BenchmarkDotNet.Toolchains.Results;
 
 namespace BenchmarkDotNet.Toolchains
 {
     public interface IExecutor
     {
-        ExecuteResult Execute(BuildResult buildResult, Benchmark benchmark, ILogger logger, IResolver resolver, IDiagnoser diagnoser = null);
+        ExecuteResult Execute(ExecuteParameters executeParameters);
     }
 }

src/BenchmarkDotNet.Core/Toolchains/InProcess/InProcessExecutor.cs

@@ -13,6 +13,7 @@ using BenchmarkDotNet.Extensions;
 using BenchmarkDotNet.Jobs;
 using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Running;
+using BenchmarkDotNet.Toolchains.Parameters;
 using BenchmarkDotNet.Toolchains.Results;
 using JetBrains.Annotations;
 
@@ -57,24 +58,17 @@ namespace BenchmarkDotNet.Toolchains.InProcess
         public bool LogOutput { get; }
 
         /// <summary>Executes the specified benchmark.</summary>
-        /// <param name="buildResult">The build result.</param>
+        public ExecuteResult Execute(ExecuteParameters executeParameters)
-        /// <param name="benchmark">The benchmark.</param>
-        /// <param name="logger">The logger.</param>
-        /// <param name="resolver">The resolver.</param>
-        /// <param name="diagnoser">The diagnoser.</param>
-        /// <returns>Execution result.</returns>
-        public ExecuteResult Execute(
-            BuildResult buildResult, Benchmark benchmark, ILogger logger, IResolver resolver, IDiagnoser diagnoser = null)
         {
             // TODO: preallocate buffer for output (no direct logging)?
-            var hostLogger = LogOutput ? logger : new CompositeLogger();
+            var hostLogger = LogOutput ? executeParameters.Logger : NullLogger.Instance;
-            var host = new InProcessHost(benchmark, hostLogger, diagnoser);
+            var host = new InProcessHost(executeParameters.Benchmark, hostLogger, executeParameters.Diagnoser, executeParameters.Config);
 
             int exitCode = -1;
-            var runThread = new Thread(() => exitCode = ExecuteCore(host, benchmark, logger));
+            var runThread = new Thread(() => exitCode = ExecuteCore(host, executeParameters.Benchmark, executeParameters.Logger));
 
 #if CLASSIC
-            if (benchmark.Target.Method.GetCustomAttributes<STAThreadAttribute>(false).Any())
+            if (executeParameters.Benchmark.Target.Method.GetCustomAttributes<STAThreadAttribute>(false).Any())
             {
                 runThread.SetApartmentState(ApartmentState.STA);
             }
@@ -87,10 +81,10 @@ namespace BenchmarkDotNet.Toolchains.InProcess
 
             if (!runThread.Join((int)timeout.TotalMilliseconds))
                 throw new InvalidOperationException(
-                    $"Benchmark {benchmark.DisplayInfo} takes to long to run. " +
+                    $"Benchmark {executeParameters.Benchmark.DisplayInfo} takes to long to run. " +
                     "Prefer to use out-of-process toolchains for long-running benchmarks.");
 
-            return GetExecutionResult(host.RunResults, exitCode, logger);
+            return GetExecutionResult(host.RunResults, exitCode, executeParameters.Logger);
         }
 
         private int ExecuteCore(IHost host, Benchmark benchmark, ILogger logger)

src/BenchmarkDotNet.Core/Toolchains/InProcess/InProcessHost.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Diagnostics;
 using System.IO;
+using BenchmarkDotNet.Configs;
 using BenchmarkDotNet.Diagnosers;
 using BenchmarkDotNet.Engines;
 using BenchmarkDotNet.Loggers;
@@ -13,9 +14,6 @@ namespace BenchmarkDotNet.Toolchains.InProcess
     /// <seealso cref="IHost"/>
     public sealed class InProcessHost : IHost
     {
-        [NotNull]
-        private readonly Benchmark benchmark;
-
         [NotNull]
         private readonly ILogger logger;
 
@@ -23,13 +21,13 @@ namespace BenchmarkDotNet.Toolchains.InProcess
         private readonly IDiagnoser diagnoser;
 
         [CanBeNull]
-        private readonly Process currentProcess;
+        private readonly DiagnoserActionParameters diagnoserActionParameters;
 
         /// <summary>Creates a new instance of <see cref="InProcessHost"/>.</summary>
         /// <param name="benchmark">Current benchmark.</param>
         /// <param name="logger">Logger for informational output.</param>
         /// <param name="diagnoser">Diagnosers, if attached.</param>
-        public InProcessHost(Benchmark benchmark, ILogger logger, IDiagnoser diagnoser)
+        public InProcessHost(Benchmark benchmark, ILogger logger, IDiagnoser diagnoser, IConfig config)
         {
             if (benchmark == null)
                 throw new ArgumentNullException(nameof(benchmark));
@@ -37,13 +35,15 @@ namespace BenchmarkDotNet.Toolchains.InProcess
             if (logger == null)
                 throw new ArgumentNullException(nameof(logger));
 
-            this.benchmark = benchmark;
             this.logger = logger;
             this.diagnoser = diagnoser;
             IsDiagnoserAttached = diagnoser != null;
 
             if (diagnoser != null)
-                currentProcess = Process.GetCurrentProcess();
+                diagnoserActionParameters = new DiagnoserActionParameters(
+                    Process.GetCurrentProcess(),
+                    benchmark,
+                    config);
         }
 
         /// <summary><c>True</c> if there are diagnosers attached.</summary>
@@ -72,15 +72,15 @@ namespace BenchmarkDotNet.Toolchains.InProcess
             switch (hostSignal)
             {
                 case HostSignal.BeforeAnythingElse:
-                    diagnoser?.BeforeAnythingElse(currentProcess, benchmark);
+                    diagnoser?.BeforeAnythingElse(diagnoserActionParameters);
                     WriteLine(Engine.Signals.BeforeAnythingElse);
                     break;
                 case HostSignal.AfterSetup:
-                    diagnoser?.AfterSetup(currentProcess, benchmark);
+                    diagnoser?.AfterSetup(diagnoserActionParameters);
                     WriteLine(Engine.Signals.AfterSetup);
                     break;
                 case HostSignal.BeforeMainRun:
-                    diagnoser?.BeforeMainRun(currentProcess, benchmark);
+                    diagnoser?.BeforeMainRun(diagnoserActionParameters);
                     WriteLine(Engine.Signals.BeforeMainRun);
                     break;
                 case HostSignal.BeforeCleanup:

src/BenchmarkDotNet.Core/Toolchains/Parameters/ExecuteParameters.cs

@@ -0,0 +1,34 @@
+using BenchmarkDotNet.Characteristics;
+using BenchmarkDotNet.Configs;
+using BenchmarkDotNet.Diagnosers;
+using BenchmarkDotNet.Loggers;
+using BenchmarkDotNet.Running;
+using BenchmarkDotNet.Toolchains.Results;
+
+namespace BenchmarkDotNet.Toolchains.Parameters
+{
+    public class ExecuteParameters
+    {
+        public ExecuteParameters(BuildResult buildResult, Benchmark benchmark, ILogger logger, IResolver resolver, IConfig config, IDiagnoser diagnoser = null)
+        {
+            BuildResult = buildResult;
+            Benchmark = benchmark;
+            Logger = logger;
+            Resolver = resolver;
+            Config = config;
+            Diagnoser = diagnoser;
+        }
+
+        public BuildResult BuildResult { get;  }
+
+        public Benchmark Benchmark { get; }
+
+        public ILogger Logger { get; }
+
+        public IResolver Resolver { get; }
+
+        public IConfig Config { get; }
+
+        public IDiagnoser Diagnoser { get; }
+    }
+}

src/BenchmarkDotNet.Diagnostics.Windows/EtwDiagnoser.cs

@@ -6,6 +6,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Threading;
 using System.Threading.Tasks;
+using BenchmarkDotNet.Diagnosers;
 using Microsoft.Diagnostics.Tracing;
 using Microsoft.Diagnostics.Tracing.Parsers;
 using Microsoft.Diagnostics.Tracing.Session;
@@ -24,18 +25,18 @@ namespace BenchmarkDotNet.Diagnostics.Windows
 
         protected abstract string SessionNamePrefix { get; }
 
-        protected void Start(Process process, Benchmark benchmark)
+        protected void Start(DiagnoserActionParameters parameters)
         {
             Cleanup();
 
-            BenchmarkToProcess.Add(benchmark, process.Id);
+            BenchmarkToProcess.Add(parameters.Benchmark, parameters.Process.Id);
-            StatsPerProcess.TryAdd(process.Id, GetInitializedStats(benchmark));
+            StatsPerProcess.TryAdd(parameters.Process.Id, GetInitializedStats(parameters));
 
-            Session = CreateSession(benchmark);
+            Session = CreateSession(parameters.Benchmark);
 
             EnableProvider();
 
-            AttachToEvents(Session, benchmark);
+            AttachToEvents(Session, parameters.Benchmark);
 
             // The ETW collection thread starts receiving events immediately, but we only
             // start aggregating them after ProcessStarted is called and we know which process
@@ -49,7 +50,7 @@ namespace BenchmarkDotNet.Diagnostics.Windows
             WaitUntilStarted(task);
         }
 
-        protected virtual TStats GetInitializedStats(Benchmark benchmark) => new TStats();
+        protected virtual TStats GetInitializedStats(DiagnoserActionParameters parameters) => new TStats();
 
         protected virtual TraceEventSession CreateSession(Benchmark benchmark)
              => new TraceEventSession(GetSessionName(SessionNamePrefix, benchmark, benchmark.Parameters));

src/BenchmarkDotNet.Diagnostics.Windows/JitDiagnoser.cs

@@ -19,11 +19,11 @@ namespace BenchmarkDotNet.Diagnostics.Windows
 
         public IColumnProvider GetColumnProvider() => EmptyColumnProvider.Instance;
 
-        public void BeforeAnythingElse(Process process, Benchmark benchmark) => Start(process, benchmark);
+        public void BeforeAnythingElse(DiagnoserActionParameters parameters) => Start(parameters);
 
-        public void AfterSetup(Process process, Benchmark benchmark) { }
+        public void AfterSetup(DiagnoserActionParameters _) { }
 
-        public void BeforeMainRun(Process process, Benchmark benchmark) { }
+        public void BeforeMainRun(DiagnoserActionParameters _) { }
 
         public void BeforeCleanup() => Stop();
 

src/BenchmarkDotNet.Diagnostics.Windows/MemoryDiagnoser.cs

@@ -30,11 +30,11 @@ namespace BenchmarkDotNet.Diagnostics.Windows
 
         protected override string SessionNamePrefix => "GC";
 
-        public void BeforeAnythingElse(Process process, Benchmark benchmark) { }
+        public void BeforeAnythingElse(DiagnoserActionParameters _) { }
 
-        public void AfterSetup(Process process, Benchmark benchmark) { }
+        public void AfterSetup(DiagnoserActionParameters _) { }
 
-        public void BeforeMainRun(Process process, Benchmark benchmark) => Start(process, benchmark);
+        public void BeforeMainRun(DiagnoserActionParameters parameters) => Start(parameters);
 
         public void BeforeCleanup() => Stop();
 

src/BenchmarkDotNet.Diagnostics.Windows/PmcDiagnoser.cs

@@ -112,10 +112,10 @@ namespace BenchmarkDotNet.Diagnostics.Windows
             get { throw new NotImplementedException("Not needed for Kernel sessions (can be only one at a time"); }
         }
 
-        public void BeforeAnythingElse(Process process, Benchmark benchmark) { }
+        public void BeforeAnythingElse(DiagnoserActionParameters _) { }
-        public void AfterSetup(Process process, Benchmark benchmark) { }
+        public void AfterSetup(DiagnoserActionParameters _) { }
 
-        public void BeforeMainRun(Process process, Benchmark benchmark) => Start(process, benchmark);
+        public void BeforeMainRun(DiagnoserActionParameters parameters) => Start(parameters);
 
         public void BeforeCleanup() => Stop();
 
@@ -161,9 +161,9 @@ namespace BenchmarkDotNet.Diagnostics.Windows
             }
         }
 
-        protected override PmcStats GetInitializedStats(Benchmark benchmark)
+        protected override PmcStats GetInitializedStats(DiagnoserActionParameters parameters)
         {
-            var stats = new PmcStats(benchmark.Job.Diagnoser.HardwareCounters);
+            var stats = new PmcStats(parameters.Config.GetHardwareCounters().ToArray());
 
             var counters = stats.Counters.Values;
 

tests/BenchmarkDotNet.IntegrationTests/JobTests.cs

@@ -371,12 +371,12 @@ namespace BenchmarkDotNet.IntegrationTests
             var a = CharacteristicHelper
                 .GetThisTypeCharacteristics(typeof(Job))
                 .Select(c => c.Id);
-            Equal(string.Join(";", a), "Id;Accuracy;Diagnoser;Env;Infrastructure;Run");
+            Equal(string.Join(";", a), "Id;Accuracy;Env;Infrastructure;Run");
             a = CharacteristicHelper
                 .GetAllCharacteristics(typeof(Job))
                 .Select(c => c.Id);
             Equal(string.Join(";", a), "Id;Accuracy;AnalyzeLaunchVariance;EvaluateOverhead;" +
-                "MaxStdErrRelative;MinInvokeCount;MinIterationTime;RemoveOutliers;Diagnoser;HardwareCounters;Env;Affinity;" +
+                "MaxStdErrRelative;MinInvokeCount;MinIterationTime;RemoveOutliers;Env;Affinity;" +
                 "Jit;Platform;Runtime;Gc;AllowVeryLargeObjects;Concurrent;CpuGroups;Force;" +
                 "RetainVm;Server;Infrastructure;Clock;EngineFactory;Toolchain;Run;InvocationCount;IterationTime;" +
                 "LaunchCount;RunStrategy;TargetCount;UnrollFactor;WarmupCount");

tests/BenchmarkDotNet.IntegrationTests/ToolchainTest.cs

@@ -8,6 +8,7 @@ using BenchmarkDotNet.Loggers;
 using BenchmarkDotNet.Running;
 using BenchmarkDotNet.Tests.Loggers;
 using BenchmarkDotNet.Toolchains;
+using BenchmarkDotNet.Toolchains.Parameters;
 using BenchmarkDotNet.Toolchains.Results;
 using Xunit;
 using Xunit.Abstractions;
@@ -46,9 +47,9 @@ namespace BenchmarkDotNet.IntegrationTests
         {
             public bool Done { get; private set; }
 
-            public ExecuteResult Execute(BuildResult buildResult, Benchmark benchmark, ILogger logger, IResolver resolver, IDiagnoser diagnoser)
+            public ExecuteResult Execute(ExecuteParameters executeParameters)
             {
-                logger.WriteLine("Executing");
+                executeParameters.Logger.WriteLine("Executing");
                 Done = true;
                 return new ExecuteResult(true, 0, Array.Empty<string>(), Array.Empty<string>());
             }