redbean 2.0 release notes
redbean is a webserver in a zip executable that runs on six operating systems. The basic idea is if you want to build a web app that runs anywhere, then you download the redbean.com file, put your .html and .lua files inside it using the zip command, and then you've got a hermetic app you can deploy and share. I introduced this web server about a year ago on Hacker News, where it became the third
Size Optimization Tricks
This blog post will cover some of the tricks I've used in the past to make c / c++ / python binaries smaller using x86 assembly. Much of it will revolve around the Cosmopolitan codebase, since I recently received feedback from the ELKS project that they love the code and want to hear more about how the tricks cosmo uses can potentially improve projects as intriguing as a i8086 Linux port. In many
Logging C Function Calls
May 19th, 2022 @ justine's web page Logging C Functions One of my favorite features of the Cosmopolitan Libc runtime is its --ftrace flag that logs C function calls. It's the simplest system for debugging programs I've ever used and it surprises me that I found no evidence of someone having invented it before. Here's one of its most important use cases. Have you ever had you debugger stupified by
Lambda Calculus in 383 Bytes
The Lambda Calculus is a programming language with a single keyword. It's the Turing tarpit discovered by Turing's doctoral advisor. This blog post introduces a brand new 383 byte implementation of binary lambda calculus as an x86-64 Linux ELF executable. Friendly portable C code and prebuilt APE binaries are provided for other platforms too. SectorLambda implements a Church-Krivine-Tromp virtual
LISP with GC in 436 bytes
SectorLISP now supports garbage collection. This is the first time that a high-level garbage collected programming language has been optimized to fit inside the 512-byte boot sector of a floppy disk. Since we only needed 436 bytes, that means LISP has now outdistanced FORTH and BASIC to be the tiniest programming language in the world. SectorLISP consists of 223 lines of assembly. It provides a LI
SectorLISP Now Fits in One Sector
Update: Please read our most recent SectorLISP v2 announcement: LISP with GC in 436 bytes The SectorLISP project has achieved its goal of creating a LISP that's tiny enough to fit in the master boot sector of a floppy disk. To the best of our knowledge, this is the tiniest LISP to date. Since a master boot record is only 512 bytes, that means LISP is now tied with FORTH to be the most lightweight
Actually Portable Executable
24 aug 2020 @ justine's web page αcτµαlly pδrταblε εxεcµταblε One day, while studying old code, I found out that it's possible to encode Windows Portable Executable files as a UNIX Sixth Edition shell script, due to the fact that the Thompson Shell didn't use a shebang line. Once I realized it's possible to create a synthesis of the binary formats being used by Unix, Windows, and MacOS, I couldn't
Cosmopolitan Libc: build-anywhere run-anywhere C library
Cosmopolitan Libc makes C a build-anywhere run-anywhere language, like Java, except it doesn't need an interpreter or virtual machine. Instead, it reconfigures stock GCC and Clang to output a POSIX-approved polyglot format that runs natively on Linux + Mac + Windows + FreeBSD + OpenBSD + NetBSD + BIOS on AMD64 and ARM64 with the best possible performance. Getting Started First, download the Cosmop
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