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A 1958 UNIVAC airline reservation system
I had thought that SABRE, a joint development of IBM and American Airlines, was the first computerized airline reservation system, going live in 1960. However, “The Univac Air […]
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Inspecting coredumps like it's 2021
Consulting & Support for the Nix ecosystem by Mayflower GmbH
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A reference counting bug which leads to local privilege escalation in io_uring
Hello, I’m Shiga( @Ga_ryo_ ), a security engineer at Flatt Security Inc.
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LLVM internals, part 4: attributes and attribute groups
This is the last post I plan to do on parsing LLVM’s bitcode, at least for a while. I’ll keep working on the various libraries that I’ve started under the mollusc umbrella, but they won’t be accompanied by regular posts anymore — I’d like to refocus on writing smaller, less dense (read: lower-pressure) posts for a…
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A bit of XENIX history (2014)
Retrocomputing and other indulgences
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Dealing with Out-of-Memory Conditions in Rust
In this post, CrowdStrike's Engineering team walks through one possible way of adapting a library to handle OOM events without aborting the process.
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Linux implementation of Homa, a protocol to replace TCP for low-latency RPC
Programming note: I will be taking a several week break from writing paper reviews for the summer. When we come back, I will be finishing off the papers from Usenix ATC and OSDI , then moving on to the great upcoming conferences (my non-exhaustive list is here ). As always, feel free to reach out on Twitter with…
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Linux Capabilities in a nutshell (2019)
Linux capabilities can be difficult to understand so let's go through them quickly
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Stuff Your Logs
Paul Khuong's personal blog. Some Lisp, some optimisation, mathematical or computer.
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Linux Networking: MAC VLANs and Virtual Ethernets
This website is for sale! pocketnix.org is your first and best source for information about pocketnix. Here you will also find topics relating to issues of general interest. We hope you find what you are looking for!
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BGP in a Nutshell
PhD student at University of Texas at Austin 🤘. Doing systems for ML.
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What security does a default OpenBSD installation offer?
In this text I will explain what makes OpenBSD secure by default when you install it. Do not take this for a security analysis, but more like a guide to help you understand what is done by OpenBSD to have a secure environment. The purpose of this text is not to compare OpenBSD to other OSes but to say what you can…
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Android emulator abused to introduce malware onto PCs
Attackers have compromised the software distribution system of BigNox, developer of a popular Android emulator for PCs and Macs.
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Prefix sum on portable compute shaders
This is a followup to my previous post, prefix sum on Vulkan. Last year, I got a fancy algorithm for this problem running well on one device. This time, I will dive into the question of how to make it work well across a wide range of devices. The short answer is, it can be made to work pretty portably on Vulkan and…
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Measuring memory usage in Python: it’s tricky
Measuring your Python program’s memory usage is not as straightforward as you might think. Learn two techniques, and the tradeoffs between them.
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Why query planning for streaming systems is hard
Many groups are working on running sql queries in incremental/streaming systems . Query planning in this context is not a well understood problem. This post is a quick pointer towards the many open problems. It's not intended to be complete or authoritative, because I haven't engaged with the problem much beyond…
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C++ Exceptions: Under the Hood (2013)
Index A tiny ABI An ABI to appease the linker Catching what you throw Magic around __cxa_begin_catch and __cxa_end_catch Gcc...
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Correctly implementing a spinlock in Modern C++
I’ve seen a lot of poorly implemented spinlocks floating around the internet.
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The free lunch is over: a fundamental turn toward concurrency in software (2005)
The biggest sea change in software development since the OO revolution is knocking at the door, and its name is Concurrency.
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Haiku Activity Report – January 2021
Hello everyone, apparently we made it to 2021! This year we will see the 20th anniversary of Haiku. This report covers hrev54806-hrev54947. Architectures, ports, bootloaders PulkoMandy fixed the build of the openfirmware bootloader for PowerPC. It …
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When you have too much memory for SheepShaver
When I first got my 133MHz BeBox (not new, sadly), it had "only" 32MB of memory and it had four more SIMM slots to fill. While Be only off...
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Scion – A Novel Internet Architecture
At RIPE 81, a group of enthusiastic researchers and practitioners from industry and academia discussed with the RIPE community what role RIRs and LIRs could take on in the SCION next-generation Internet architecture. More than 80 BoF participants discussed this question, wanting to learn more about…
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64-Bit Linux Return-Oriented Programming
Update : Dongli Zhang reports that newer Linux versions organize the stack differently . The code below will need to be modified accordingly.
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A Universal I/O Abstraction for C++ (2020)
This article is the sequel to A Universal Async Abstraction for C++ , in which I talk about the Executor proposal targeting C++23. Quite a bit happened since then.
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Deep Diving into the Strengths of FreeBSD
Discover the strengths of FreeBSD in this article. Learn about its advanced networking, performance, security, and compatibility features that set it apart.
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Airbnb’s Server-Driven UI System
How Airbnb ships features faster across web, iOS, and Android using a server-driven UI system named Ghost Platform 👻.