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It Goes To Eleven
Jonathan Morrison's Blog on the Windows Kernel, Windows Kernel Debugging and Other Random Stuff
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It Goes To Eleven
Preventing Race Conditions in Code That Accesses Global Data
Posted
over 3 years ago
by
theelvez
0
Comments
Abstract Race conditions in C/C++ code are amazingly easy to introduce and notoriously difficult to debug. The costs associated with a race condition can vary from 0 to “very expensive” depending on where in the code they occur. For example, if there...
It Goes To Eleven
Runtime Code Patching - Not for the Faint of Heart
Posted
over 4 years ago
by
theelvez
10
Comments
I have been involved in several conversations recently that have revolved around the joys of runtime code patching. I am always shocked to hear people say that they are ok with this idea of code patching at runtime. Moreover – it shocks me that they think...
It Goes To Eleven
Getting the Crashing Stack From a Bugcheck
Posted
over 4 years ago
by
theelvez
4
Comments
Sorry for the long delay on posting - I have been slammed lately. I decided to write a post about debugging and take a short break from the bare metal stuff we have been discussing as of late. :) When a bugcheck occurs in Windows, the following basic...
It Goes To Eleven
It Goes to Eleven and ... to the NT Insider!
Posted
over 4 years ago
by
theelvez
3
Comments
Well - for anyone bored enough to track such things, I have been pretty slammed lately and haven't blogged anything. I have a bunch of stuff queued up though. Upcoming posts (in the next few days hopefully) are: 1. The Anatomy of a Context Switch ...
It Goes To Eleven
Why Your User Mode Pointer Captures Are Probably Broken
Posted
over 4 years ago
by
theelvez
9
Comments
There is a problem that I suspect is pretty widespread in the majority of driver code. The problem is the improper capturing of user mode pointers. I decided to write a blog about it and try to get a feel for if I am right or not. J I figure that if people...
It Goes To Eleven
How Does KeMemoryBarrier Work?
Posted
over 4 years ago
by
theelvez
4
Comments
KeMemoryBarrier is a kernel DDK support macro. There is also a WIN32 macro called MemoryBarrier that is implemented identically (there is an observance test hidden here!) - so we will just talk about KeMemoryBarrier here, but everything we say about it...
It Goes To Eleven
The Joys of Compiler and Processor Reordering: Why You Technically Need Read-Side Barriers
Posted
over 4 years ago
by
theelvez
29
Comments
In a previous post on compiler and processor reordering, I said that for multi-threaded, lock-free code to be totally correct - you need a barrier on the read sides of the code - but that it was pretty complicated and wasn't required on any processors...
It Goes To Eleven
The Joys of Compiler and Processor Reordering
Posted
over 4 years ago
by
theelvez
10
Comments
So I thought that a good first technical blog entry would be one about a common – but “hardly thought about by most programmers” problem called “reordering”. It is a subtle problem but very important to understand if you write lock-less multithreaded...
It Goes To Eleven
It Goes to Eleven
Posted
over 4 years ago
by
theelvez
4
Comments
I am brand new to the world of blogs so I apologize in advance to any one that reads this blog. Please let me know if I am doing something rude or ignorant. :) "Allow myself to .. introduce ... myself ..." My name is Jonathan Morrison and I work...
It Goes To Eleven
Hello World!
Posted
over 4 years ago
by
theelvez
4
Comments
Well - you have to do it don't you?
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