Accelerated .NET Memory Dump Analysis
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Accelerated .NET Memory Dump Analysis

Training Course Transcript and WinDbg Practice Exercises for .NET Core and Framework, Fourth Edition

About the Book

The full transcript of Software Diagnostics Services training with 20 step-by-step exercises, notes, source code of specially created modeling applications and selected Q&A. The course covers 22 .NET memory dump analysis patterns plus additional 15 unmanaged patterns. Learn how to analyze .NET Core 5 and .NET Framework CLR 4 application and service crashes and freezes, navigate through memory dump space (managed and unmanaged code) and diagnose corruption, leaks, CPU spikes, blocked threads, deadlocks, wait chains, resource contention, and much more. The training consists of practical step-by-step exercises using Microsoft WinDbg debugger to diagnose patterns in 64-bit and 32-bit process memory dumps. The training uses a unique and innovative pattern-oriented analysis approach to speed up the learning curve. The fourth edition has 7 new .NET Core exercises added for the latest WinDbg version and Windows 10 and updated command highlighting for the existing 12 .NET Framework exercises from the previous edition. This edition also includes a possibility to use a Docker WinDbg image with required symbol files instead of a local Debugging Tools for Windows installation. Prerequisites: Basic .NET programming and debugging. Audience: Software technical support and escalation engineers, system administrators, DevOps, performance and reliability engineers, software developers, and quality assurance engineers.

About the Author

Dmitry Vostokov
Dmitry Vostokov

Dmitry Vostokov is an internationally recognized expert, speaker, educator, scientist and author. He is the founder of pattern-oriented software diagnostics, forensics and prognostics discipline and Software Diagnostics Institute. Vostokov has also authored more than 50 books on software diagnostics, anomaly detection and analysis, software and memory forensics, root cause analysis and problem solving, memory dump analysis, debugging, software trace and log analysis, reverse engineering and malware analysis. He has more than 25 years of experience in software architecture, design, development and maintenance in a variety of industries including leadership, technical and people management roles. Dmitry also founded Syndromatix, Anolog.io, BriteTrace, DiaThings, Logtellect, OpenTask Iterative and Incremental Publishing and Software Diagnostics Technology and Services (former Memory Dump Analysis Services) and Software Prognostics. In his spare time, he presents various topics on Debugging TV and explores Software Narratology, its further development as Narratology of Things and Diagnostics of Things (DoT), and Software Pathology. His current areas of interest are theoretical software diagnostics and its mathematical and computer science foundations, application of artificial intelligence, machine learning and data mining to diagnostics and anomaly detection, software diagnostics engineering and diagnostics-driven development, diagnostics workflow and interaction. Recent interest areas also include cloud native computing, security, automation, functional programming, and applications of category theory to software development and big data.

Table of Contents

About the Author 5

Introduction 7

Practice Exercises (.NET Core) 23

Exercise 0: Download, setup and verify your WinDbg or WinDbg Preview installation or Docker WinDbg image 28

Exercise Core.PN1: Analysis of an application process dump (ApplicationA, 64-bit) 41

Exercise Core.PN2: Analysis of an application process dump (ApplicationA, 32-bit) 70

Exercise Core.PN3: Analysis of an application process dump (LINQPadB, 64-bit) 92

Exercise Core.PN5: Analysis of an application process dump (LINQPadC, 64-bit) 126

Exercise Core.PN7: Analysis of an application process dump (ApplicationD, 64-bit) 146

Exercise Core.PN9: Analysis of an application process dump (LINQPadD, 64-bit) 161

Exercise Core.PN11: Analysis of an application process dump (LINQPadE, 64-bit) 177

Practice Exercises (.NET Framework) 183

Exercise Framework.PN1: Analysis of an application process dump (ApplicationA, 64-bit) 188

Exercise Framework.PN2: Analysis of an application process dump (ApplicationA, 32-bit) 207

Exercise Framework.PN3: Analysis of an application process dump (LINQPadB, 64-bit) 223

Exercise Framework.PN4: Analysis of an application process dump (LINQPadB, 32-bit) 246

Exercise Framework.PN5: Analysis of an application process dump (LINQPadC, 64-bit) 269

Exercise Framework.PN6: Analysis of an application process dump (LINQPadC, 32-bit) 284

Exercise Framework.PN7: Analysis of an application process dump (ApplicationD, 64-bit) 303

Exercise Framework.PN8: Analysis of an application process dump (ApplicationD, 32-bit) 330

Exercise Framework.PN9: Analysis of an application process dump (LINQPadD, 64-bit) 345

Exercise Framework.PN10: Analysis of an application process dump (LINQPadD, 32-bit) 361

Exercise Framework.PN11: Analysis of an application process dump (LINQPadE, 64-bit) 378

Exercise Framework.PN12: Analysis of an application process dump (LINQPadE, 32-bit) 388

Conclusion 399

Application Source Code 407

ApplicationA 409

LinqB 410

LinqC 411

ApplicationD 413

LinqD 415

LinqE 417

Selected Q&A 419

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