Viewing profile — ryanpetrich

Should throw expressions ( https://github.com/tc39/proposal-throw-expressions ) ever make it into the JavaScript standard, the example could be simplified to: const env_var = proce…

aligned_alloc is a C function. It doesn't help the compiler prove that two pointers can't alias. restrict is the keyword that does.

This is to suppress a compiler warning that the k_sz argument is unused.

The bigger problem is mutability. Any pointers into the bit-packed enum storage become invalid as soon as you change its type. To solve this you can either prohibit pointers into b…

Memory barriers don't force a flush of all CPU cache. They will enforce the ordering of memory operations issued before and after the barrier instruction, preserving the contents o…

Yes, that's right. You need to update the entire OS for a minor security fix to iMessage.

Thanks for writing this. It takes a deep understanding to explain such complicated concepts in an accessible way. Reading it brought back fond memories of hacking on jailbreak proj…

Go's internal linker is much faster than the system linker thanks to some go-specific optimizations. Go must fall back to the system linker whenever CGO is used.

If best effort is good enough and your use case doesn't require robustness, reading out of host /proc certainly works. Tracking execs with hooks in the kernel's internal exec mecha…

It's not robust at all. Programs can and will exit before the userspace daemon is able to read from /proc. Malicious programs can even attribute their network activity to any progr…

This is what ETags are for. Upon a user's first visit the server should return an ETag uniquely representing the current version of the page. The browser will cache both the page a…

A benefit of storing the reference count in the high bits is that overflows will never corrupt the flag bits and can be detected using the processor's flags instead of requiring a …

Apple's recent aarch64 implementations don't support any of the 32 bit ARM instruction sets, and aarch64 is a significant departure from armv7

It's pluggable in that large parts of it can be replaced or disabled at compile time. Runtime reconfiguration isn't well supported.

Another option: git log --all --author=`git config user.email` --oneline --decorate

Crystal is not Ruby, nor is it anywhere near as fast as C.

BPF programs can be attached to uprobes and thus much of the same tooling applies to userspace as well.

Being further away from killers that I'm equally likely to be victims of isn't any more comforting.

It’s also dangerous in JavaScript where properties of the Object prototype can mistakenly be dereferenced instead of the default/fallthrough case.

There's also the matter of someone forcibly pulling a machine's power cord. In some sense exit cleanups are fundamentally unreliable.

That's likely due to amp-font, which will wait a certain amount of time for custom fonts to load before continuing with a fallback browser font (see: https://amp.dev/documentation/…

Cassandra’s sets, lists and maps are already CRDTs

The code to run in the worker is passed as a string or a path, so no data can be captured. Data can be sent to the worker by posting messages, but the data is never shared—only cop…