Joyee Cheung

@joyeecheung

She/her. I contribute to Node.js and V8. I post about museums, food, plants and other stuff too. Blog:

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Added some new commands to the GDB & LLDB plugin for V8.. `v8 source`: shows the JS source of the selected frame `v8 isolate`: find the isolate address in the current thread, works from the coredump too (implementing that in LLDB was quite a bit of challenge!)

Screenshot showing v8 isolate and v8 source

Joyee Cheung@joyeecheung· 10d

Another stop at Vitoria-Gasteiz, now I have been to all provinces in the Basque Community, maybe the next time I should go to Pamplona 🤔 The museums in Vitoria all have free entry!

Map of Roman Álava, the milestone was made during the 3rd century crisis and was honouring Postumus

Ciudad con sol and Ciudad con lluvia by the local impressionist Fernando de Amárica, showing la Plaza de la Virgen Blanca in sun and in rain

La plaza de la virgen blanca and San Miguel

Joyee Cheung@joyeecheung· 13d

Museo de Burgos: ⭐️⭐️⭐️⭐️ Museo de la Evolución Humana: ⭐️⭐️⭐️⭐️⭐️

Statue of the Egyptian goddess Isis dated 2nd century AD from the deeply inland Clunia in Museo de Burgos

Ecosystem models of Sierra de Atapuerca in four different periods as the roof of different exhibition rooms in Museo de la Evolución Humana, very interesting design

Oldest known (pre-)Neanderthals fossils from Sima de los Huesos and an handaxe without wear and tear, possibly the earliest signs of burial ritual?

Fossils of Homo Antecessor and probable signs of cannibalism

Joyee Cheung@joyeecheung· 16d

There wasn’t a heatwave in the forecast when I planned my vacation in Burgos but there will be one soon according to the current forecast 😅 Anyways it’s fun to walk around here and see the tomb of El Cid, who was the first Spanish figure I knew (from playing AOE2 when I was a very small kid)!

An impressive dome in the Burgos cathedral

Tomb of El Cid and Jimena Díaz, in the Burgos Cathedral

The place where according to legend, El Cid forced Alfonso VI to swear he didn’t assassinate Sancho II - a story that was referenced in AOE2

Joyee Cheung@joyeecheung· Jul 8

Made the new debug helper plugins work for Node.js + bleeding edge V8 🌟 Verified it works in LLDB (Linux, macOS) & GDB (Linux), both in live and coredump debugging Going to backport the patches to Node.js when the object inspection is more polished and it stablizes bit more..

Using the plugin, bt in gdb shows the JS source info of JIT-compiled frames, mostly from the CJS loader (without plugin gdb only shows ???)

In the plugin's `v8 inspect` command, it shows the this argument of the first frame is a function named "Module" (the CJS loader class i.e. require('module').Module)

Joyee Cheung@joyeecheung· Jul 7

Landed a few improvements to the error reporting for require(esm) with top-level await (behind --experimental-print-required-tla for now): - No longer need to run the code to collect the TLA locations, so it can be enabled by default soon - Added require stack and location metadata to the error

Before: extra noisy arrow pointing to internals, no require stack, needs to run the code to find the top-level await location
After: no more noisy arrows, added require stacks to the output, finds location without running the code

New ERR_REQUIRE_ASYNC_MODULE includes error.requireStack and error.topLevelAwaitLocations metadata properties

Joyee Cheung@joyeecheung· Jun 23

Had a great Igalia week last week, @lukel97.bsky.social, Cathie and I fed other Igalians some Zongzi, told them the story of the Dragon Boat Festival and taught them how to write Chinese words related to the festival! (Forgot to take a picture of our table but I have a picture of preps ^^)

Preparing for the Chinese writing activity

Joyee Cheung@joyeecheung· Jun 15

Great first day at the Web Engine Hackfest!

Decoupling Extensions from Chrome: The Journey to a Modular Extensions Layer by Miyoung Shin and Lorenzo Tilve

The EU Cyber Resilience Act: what is it, and how does it affect web browsers? by Aki Rose Braun, Daniel Ari Ehrenberg Goldberg

npmx: a fast, modern browser for the npm registry by Daniel Roe, Matias Leandro Capeletto (patak)

Joyee Cheung@joyeecheung· Jun 13

Amsterdam sure has a lot of great museums! Rijksmuseum was absolutely my favorite, though I only had the time to go through two floors…

Dowry lottery for Jewish brides from 17th century Amsterdam in the Jewish museum

Reconstructed studio of Rembrandt in the Rembrandt house museum

Almond Blossom in the Van Gogh museum, it was a gift to Van brother and sister-in-law to celebrate Van Gogh’s new born nephew, painted while he was in a psychiatric asylum fighting with mental illness.

Romanticised model of a Javanese market made as souvenirs for Europeans in the 19th century, from the Rijksmuseum

Joyee Cheung@joyeecheung· Jun 6

Moving along with the debug_helper-based LLDB & GDB V8 plugins...this now supports basic object inspection! It was fun to write tests that deliberately corrupt the memory and make sure the plugin falls back gracefully, something I've never tried before when maintaining other plugins :D

A screenshot showing the receiver (this) being displayed when doing bt in lldb using the plugin, and using v8 inspect to print JS objects

Joyee Cheung@joyeecheung· Jun 5

Arriving in Amsterdam~

Joyee Cheung@joyeecheung· May 7

Landed a set of LLDB & GDB plugins in V8 to help inspect JS states in a live process/coredump together with native states ✨ The initial implementation just supports JS stack trace annotations in bt; support for object inspection is coming up! chromium.googlesource.com/v8/v8.git/+/...

Without the plugin, debugging a coredump from a release build of V8 shows no JS-level information in the stack trace; with the plugin the stack trace is annotated with JS source positions of the functions on the frames.

Joyee Cheung@joyeecheung· May 1

Every time my Internet seems off

Me asking Gemini if there is a football game in spain right now

Joyee Cheung@joyeecheung· Apr 17

Had a blast in London! Thanks @tchetwin.bsky.social, @legendecas.bsky.social and many volunteering Bloombergers for organising a great Node.js collab summit 😇 This was one of the most attended summits I’ve been to, so didn’t get to say hi to everyone, but very happy to see many new faces!

A crow having a snack in the Forgotten Streams

Joyee Cheung@joyeecheung· Apr 5

Spring has arrived in Galicia!

Joyee Cheung@joyeecheung· Apr 3

There are a lot more purple now (I am a bit meh about this particular shade of purple though)

Some C++ code rendered in the new VS code default color scheme

Some JS code rendered in the new VS code default color scheme

Joyee Cheung@joyeecheung· Feb 8

Failed catastrophically at the “don’t look at GitHub” weekend challenge. But on the bright side…

I got thanked with good karma on GitHub.

Joyee Cheung@joyeecheung· Dec 31

Installed Parallels since I wanted to play some Windows-only games anyway and tried building it on Windows ARM64, which miraculously compiled without much effort, and I got it to work on Windows before heading to new year's eve dinner 🎊

The node --build-sea command working on Windows

Joyee Cheung@joyeecheung· Dec 24

🥶

Joyee Cheung@joyeecheung· Dec 8

Joyee Cheung@joyeecheung· Dec 5

Bumping the stability of a bunch of Node.js features that I've been contributing to...(some of them are about the time; some of them are just forgotten to be promoted to stable 😅)

Marking --build-snapshot, --build-snapshot-config, --heapsnapshot-near-heap-limit, v8.queryObjects(), require(esm) as stable, promoting module.registerHooks() as release candidate

Joyee Cheung@joyeecheung· Nov 30

The municipal museum of Chengdu and the provincial museum of Sichuan were decent; the real hidden gem was the museum of the university of Sichuan, amazing ethnology exhibitions!

Programmable pattern loom from the western Han dynasty, an old lady brought it into her grave.

Scrolls written in Dongba symbols (pictographic glyphs used by the priests of Naxi people) guiding the dead

Chunyu (instrument) from the Warring States period with a tiger knob and a bunch of Ba-Shu scripts

Pictorial brick from the eastern Han dynasty depicting dancers performing on plates and drums

Joyee Cheung@joyeecheung· Nov 30

The fall in Chengdu

Joyee Cheung@joyeecheung· Nov 28

I wanted to see 花花 but the queue was insane so I gave up and went to the nursery and then…BABY PANDAS!!!!!

Joyee Cheung@joyeecheung· Nov 27

Visited the 三星堆 and saw the amazing bronzes (when I was a kid there was a popular myth claiming this was an alien civilisation which gave me nightmares about being kidnapped by aliens)

A very tall bronze statue of a probable priest/king/god with alien-like features (big ears, big triangular eyes, square face..)

A bronze mask with a gold cover, with similar alien-like features

Two giant masks again with alien-like features, one of them with eyes that tick out (the theory is that this is the ancestor of Shu civilisation who was said to have “vertical eyes”)

A very tall bronze statue deciphering a mythical tree and sacred birds

Joyee Cheung@joyeecheung· Nov 25

Also managed to eat mostly non-spicy food…or “Cantonese-level spicy” food (code for “just a tiny bit more than not spicy at all”, which actually is listed explicitly in some restaurants here for us Cantonese, how considerate)