leakdice
cross
leakdice | cross | |
---|---|---|
4 | 118 | |
18 | 5,965 | |
- | 2.2% | |
0.0 | 9.2 | |
about 5 years ago | 7 days ago | |
C | Rust | |
GNU General Public License v3.0 only | Apache License 2.0 |
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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.
leakdice
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My Rust program (Well, game) is leaking memory, 4MB/s.
Maybe try Leakdice: https://github.com/tialaramex/leakdice in C or rewritten in Rust: https://github.com/tialaramex/leakdice-rust/
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Twenty Years of Valgrind
In my obviously biased opinion, very specialised, but sometimes exactly what you needed (I have used this in anger maybe 2-3 times in my career since then, which is why I wrote the C version):
https://github.com/tialaramex/leakdice (or https://github.com/tialaramex/leakdice-rust)
Leakdice implements some of Raymond Chen's "The poor man’s way of identifying memory leaks" for you. On Linux at least.
https://bytepointer.com/resources/old_new_thing/20050815_224...
All leakdice does is: You pick a running process which you own, leakdice picks a random heap page belonging to that process and shows you that page as hex + ASCII.
The Raymond Chen article explains why you might ever want to do this.
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Hunting down a C memory leak in a Go program
(or there's a Rust rewrite https://github.com/tialaramex/leakdice-rust because I was learning Rust)
leakdice is not a clever, sophisticated tool like valgrind, or eBPF programming, but that's fine because this isn't a subtle problem - it's very blatant - and running leakdice takes seconds so if it wasn't helpful you've lost very little time.
Here's what leakdice does: It picks a random heap page of a running process, which you suspect is leaking, and it displays that page as ASCII + hex.
That's all, and that might seem completely useless, unless you either read Raymond Chen's "The Old New Thing" or you paid attention in statistics class.
Because your program is leaking so badly the vast majority of heap pages (leakdice counts any pages which are writable and anonymous) are leaked. Any random heap page, therefore, is probably leaked. Now, if that page is full of zero bytes you don't learn very much, it's just leaking blank pages, hard to diagnose. But most often you're leaking (as was happening here) something with structure, and very often sort of engineer assigned investigating a leak can look at a 4kbyte page of structure and go "Oh, I know what that is" from staring at the output in hex + ASCII.
This isn't a silver bullet, but it's very easy and you can try it in like an hour (not days, or a week) including writing up something like "Alas the leaked pages are empty" which isn't a solution but certainly clarifies future results.
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`Zig Cc`: A Powerful Drop-In Replacement for GCC/Clang
Right. Even in an entirely safe language you can have leaks, and valgrind is an effective way to find those leaks if you can afford the virtualisation overhead.
If you can't afford the virtualisation overhead, and you need to find leaks you should try what Raymond Chen suggests in "The poor man's way of identifying memory leaks" (not bothering to link since Microsoft will only move it anyway, they have several times since I read it). If you are too lazy to do it by hand, or find the technique works but wish it less manual, this is what Leakdice does:
https://github.com/tialaramex/leakdice
cross
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Is statically compiling against glibc possible?
To compile a program with musl on a glibc system you can use cross-rs!
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How to cross Compile on Debian for: Mac / FreeBSD / OpenBSD / Android ... ?
I cross compile to Mac, bsd, windows, etc cross ... Works great for me with either docker or podman.
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Compiling against specific version glibc
If docker is available for you, https://github.com/cross-rs/cross is another and reliable way to solve this kind of problem. I do use it regularly.
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Transitioning to Rust as a company
We are using https://github.com/cross-rs/cross.
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A guide to cross-compilation in Rust
There is some built-in support in rustc for cross-compiling, but getting the build to actually work can be tricky due to the need for an appropriate linker. Instead, we’re going to use the Cross crate, which used to be maintained by the Rust Embedded Working Group Tools group.
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Is there a definitive guide on cross-compiling with OpenSSL?
I have used cross before to cross compile from Linux to other Linux. It has a section on it's wiki about this. Maybe that could be of help.
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Docker ARMv7 Alpine Rust builder
You can use cross to build your application and copy the artifacts into an alpine armv7 container. It would also build faster due to using cross compilation rather than QEMU.
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Compiling Linux to Mac in CI/CD
Looks like cross is the easiest way to get something cross-compiled but its Mac support is blocked behind building your own build image. Even that repo says that it might be broken.
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How to you develop in containers?
Bonus: if you’re working with Rust and doing a lot of cross platform stuff, check out cross. It runs QEMU in docker so you can run tests on a bunch of different emulated targets easily- literally a one line setup, it’s kind of magical.
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What are some stuff that Rust isn't good at?
It's also not as naturally cross-compilable as Go, though that's partly a side-effect of not accepting being a semi-closed ecosystem to achieve that and cross exists as a stop-gap while things like cargo-zigbuild explore less drastic options.
What are some alternatives?
libclang_rt.builtins-wasm32.a - The missing libclang_rt.builtins-wasm32.a file to compile to WebAssembly.
dockcross - Cross compiling toolchains in Docker images
mevi - A memory visualizer in Rust (ptrace + userfaultfd)
termux-adb-fastboot - android adb-fastboot tools for termux
bytehound - A memory profiler for Linux.
opencv-rust - Rust bindings for OpenCV 3 & 4
hotspot - The Linux perf GUI for performance analysis.
rusqlite - Ergonomic bindings to SQLite for Rust
heaptrack - A heap memory profiler for Linux
plotters - A rust drawing library for high quality data plotting for both WASM and native, statically and realtimely 🦀 📈🚀
Confluent Kafka Golang Client - Confluent's Apache Kafka Golang client
homebrew-macos-cross-toolchains - macOS cross compiler toolchains