mattwarren

/**
veh_hook Vectored Exception Handler hooking library
Version: 24-March-2008
**/
#define WINVER 0x0501
#define _WIN32_WINNT 0x0501
#include <windows.h>
#include "veh_hook.h"

static veh_list_t* list = NULL;

mattwarren

Background Info

Download the official Microsoft release or the latest one on GitHub

DON'T BE PUT OFF BY THE UI (But if you are take a look at CodeTrack)

Challenges

• Run a memory profile on one of your own .NET apps (or download and interesting sample one, e.g. NerdDinner or similar)
• If all else fails, follow this tutorial that includes the code for a simple 'sample app'

mattwarren

private static void DictionaryTest()
{
	var store = new EmbeddableDocumentStore
					{
						RunInMemory = true                                
					};
	store.Configuration.TempIndexPromotionMinimumQueryCount = 1;
	store.Initialize();
	var entry1 = new ClassWithDictionary { Name = "With test", Dictionary = new Dictionary<string, string> { { "test", "value" } } };
	var entry2 = new ClassWithDictionary { Name = "Without test", Dictionary = new Dictionary<string, string> { { "nottest", "value" } } };

mattwarren

using System;
using System.Reflection;
using System.Reflection.Emit;

namespace ConsoleApplication3.Test
{
    static class EntityPtr
    {
        private static readonly IEntityPtr converter = CreateConverter();

mattwarren

using NodaTime;
using System;
using System.Diagnostics;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;

namespace JITterOptimisations
{
    public static class Extensions

mattwarren

/*
The absence of the C# unsafe keyword and switch does not guarantee code
is type or memory safe. It merely prevents the use of pointer types and
fixed size buffers.

The only thing that can guarantee type and memory safety is
verification and CAS/transparency enforcement.

In particular, the absence of unsafe C# blocks does NOT:

mattwarren

Background Info

• https://www.nuget.org/packages/Microsoft.Diagnostics.Runtime
• https://github.com/Microsoft/clrmd
• http://mattwarren.org/2018/06/15/Tools-for-Exploring-.NET-Internals/#tools-based-on-clr-memory-diagnostics-clrmd
• https://github.com/Microsoft/clrmd/blob/master/Documentation/GettingStarted.md
• https://github.com/dotnet/symstore/tree/master/src/dotnet-symbol

---

mattwarren

Background Info

A .NET library to make Benchmarking easy! See https://benchmarkdotnet.org/ and in-particular the Getting Started Guide the Main Features List

---

Hello World

Add the NuGet package Install-Package BenchmarkDotNet

mattwarren

On the topic of tail calls in .NET

Let's say you have implemented a small data pipeline library to replace LINQ.

module TrivialStream =
  type Receiver<'T> = 'T            -> unit
  type Stream<'T>   = Receiver<'T>  -> unit

  module Details =

mattwarren

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Attributes.Columns;
using BenchmarkDotNet.Configs;
using BenchmarkDotNet.Running;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;