rr
beads-examples
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rr | beads-examples | |
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102 | 12 | |
8,621 | 100 | |
1.1% | - | |
9.6 | 5.3 | |
7 days ago | about 2 months ago | |
C++ | HTML | |
GNU General Public License v3.0 or later | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
rr
- rr: Lightweight Recording and Deterministic Debugging
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Hermit is a hermetic and reproducible sandbox for running programs
I think this tool must share a lot techniques and use cases with rr. I wonder how it compares in various aspects.
https://rr-project.org/
rr "sells" as a "reversible debugger", but it obviously needs the determinism for its record and replay to work, and AFAIK it employs similar techniques regarding system call interception and serializing on a single CPU. The reversible debugger aspect is built on periodic snapshotting on top of it and replaying from those snapshots, AFAIK. They package it in a gdb compatible interface.
Hermit also lists record/replay as a motivation, although it doesn't list reversible debugging in general.
- Rr: Lightweight Recording and Deterministic Debugging
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Deep Bug
Interesting. Perhaps you can inspect the disassembly of the function in question when using Graal and HotSpot. It is likely related to that.
Another debugging technique we use for heisenbugs is to see if `rr` [1] can reproduce it. If it can then that's great as it allows you to go back in time to debug what may have caused the bug. But `rr` is often not great for concurrency bugs since it emulates a single-core machine. Though debugging a VM is generally a nightmare. What we desperately need is a debugger that can debug both the VM and the language running on top of it. Usually it's one or the other.
> In general I’d argue you haven’t fixed a bug unless you understand why it happened and why your fix worked, which makes this frustrating, since every indication is that the bug exists within proprietary code that is out of my reach.
Were you using Oracle GraalVM? GraalVM community edition is open source, so maybe it's worth checking if it is reproducible in that.
[1]: https://github.com/rr-debugger/rr
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So you think you want to write a deterministic hypervisor?
https://rr-project.org/ had the same problem. They use the retired conditional branch counter instead of instruction counter, and then instruction steeping until at the correct address.
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Is Something Bugging You?
That'll work great for your Distributed QSort Incorporated startup, where the only product is a sorting algorithm.
Formal software verification is very useful. But what can be usefully formalized is rather limited, and what can be formalized correctly in practice is even more limited. That means you need to restrict your scope to something sane and useful. As a result, in the real world running thousands of tests is practically useful. (Well, it depends on what those tests are; it's easy to write 1000s of tests that either test the same thing, or only test the things that will pass and not the things that would fail.) They are especially useful if running in a mode where the unexpected happens often, as it sounds like this system can do. (It's reminiscent of rr's chaos mode -- https://rr-project.org/ linking to https://robert.ocallahan.org/2016/02/introducing-rr-chaos-mo... )
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When "letting it crash" is not enough
The approach of check-pointing computation such that it is resumable and restartable sounds similar to a time-traveling debugger, like rr or WinDbg:
https://rr-project.org/
https://learn.microsoft.com/windows-hardware/drivers/debugge...
- When I got started I debugged using printf() today I debug with print()
- Rr: Record and Replay Debugger – Reverse Debugger
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OpenBSD KDE Plasma Desktop
https://github.com/rr-debugger/rr?tab=readme-ov-file#system-...
beads-examples
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2021 Day 2 Beads / Animated version of the puzzle shows the input data is crazy
Source code for the animated solution is on github: https://github.com/magicmouse/beads-examples/blob/master/Advent_of_Code_2021/day02_deluxe.beads
- Show HN: Is this the shortest possible version of Life?
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Beads: The next generation computer language and toolchain
Note that unless I'm very confused, the index.html is the transpiler output rather than human written.
The calculator example here makes rather more sense to me: https://github.com/magicmouse/beads-examples/blob/master/Exa...
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A handy JS color picker, that lets you pick either a HTML color or from an artist-designed palette. Repeatable color picking is now easy. Implemented as a web page, so no install needed.
they don't let you put two links in, nor can i put in a screenshot. Reddit is a strange beast. Anyway the source is on the website in the SDK at www.beadslang.org, click the "download SDK" button which gives you the full SDK (about 80 MB), there is also a version on Github if you look for the beads source code https://github.com/magicmouse/beads-examples
- Just released a new compiler for the Beads language, it includes the beginning of an open source clone of RobinHood, perhaps someone wants to join the project. I invite others to join in this project. They could use more competition.
- I wrote a real-time stock quote client + server program in a new language, makes it easy to build this kind of software.
What are some alternatives?
CodeLLDB - A native debugger extension for VSCode based on LLDB
haxe - Haxe - The Cross-Platform Toolkit
rrweb - record and replay the web
docs - Red-related user documentation repository
gef - GEF (GDB Enhanced Features) - a modern experience for GDB with advanced debugging capabilities for exploit devs & reverse engineers on Linux
pseudo-localization - Dynamic pseudo-localization in the browser and nodejs
Module Linker - browse modules by clicking directly on "import" statements on GitHub
Crafting Interpreters - Repository for the book "Crafting Interpreters"
nbdev - Create delightful software with Jupyter Notebooks
MiniSampleReturnCapsule - Two size zero (0.625m) parts that make up an autonomous return capsule to stuff your experiments in for Kerbal Space Program.
clog-cli - Generate beautiful changelogs from your Git commit history
rustfmt - Format Rust code