Alex Crichton (Jun 01 2023 at 22:48): Alex Crichton (Jun 01 2023 at 22:48):@Afonso Bordado you might be interested in the fact that riscv64 is failing CI with a rustc 1.70 build (which notably contains a LLVM 15->16 upgrade relative to 1.69). I can reproduce this failure locally with ./ci/run-tests.sh using the same version of QEMU as CI. Additionally I get a segfault in QEMU using QEMU 7.2.3 and 8.0.2 (current latest according to their website)
Do you perhaps have actual hardware to test on? I dunno how to get a gdb stack trace from qemu user mode
Afonso Bordado (Jun 01 2023 at 22:51):That's weird. Yeah I can try this on actual hardware tommorow. Might need some help with tracking it down afterwards though.
Alex Crichton (Jun 01 2023 at 22:54):hm ok so I don't know how accurate this is but I used gdb-multiarch locally to attach to qemu and it reports the faulting instruction is ld a0,0(s0) within _ZN5tokio7runtime9scheduler12multi_thread4park6Parker8shutdown17h7a55a0112c28a19dE
Alex Crichton (Jun 01 2023 at 22:54):where s0 is null
Alex Crichton (Jun 01 2023 at 22:55):so this may be "just" an llvm issue
Alex Crichton (Jun 01 2023 at 22:55):(also first time I got gdb and qemu user mode working, wow!)
Chris Clark (Jun 02 2023 at 02:04):turns out, not even cranelift can get away from llvm problems. :laughter_tears:
Afonso Bordado (Jun 02 2023 at 14:07):I've been having some issues running these WASM tests natively, it looks like rustup does not ship rust-lld for riscv64. Is there a guide somewhere on how I can compile that?
bjorn3 (Jun 02 2023 at 14:34):Is it shipped with the llvm-tools component?
Afonso Bordado (Jun 02 2023 at 14:36):Doesen't seem to be. I tried rustup component add llvm-tools-preview and it still doesen't show up in toolchain bin directory
Afonso Bordado (Jun 02 2023 at 14:36):afonso@starfive:~/git/wasmtime$ ls ~/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/
cargo cargo-clippy cargo-fmt clippy-driver rust-gdb rust-gdbgui rust-lldb rustc rustdoc rustfmt
I found a similar issue in the rust-lang repo: https://github.com/rust-lang/rust/issues/111907
Alex Crichton (Jun 02 2023 at 17:36):Yeah rust-lld is only compiled for a subset of architectures since it adds build time. It's probably "just" a flag somewhere to get it into rustc's distribution, but if it's not there that flag probably isn't flipped. Otherwise though it should still be possible to do ./ci/run-tests.sh --no-run --target ... and scp the cross-compiled binaries perhaps?
Alex Crichton (Jun 02 2023 at 18:47):Along the lines of the s390x issue, looks like 1.71 beta may not have this issue, so may not be much to investigate
Afonso Bordado (Jun 03 2023 at 12:40):So, I've found some slightly weird results. Using rustc 1.70.0 (90c541806 2023-05-31) which seems to be the same as on CI, I can't reproduce this natively, or in QEMU in my machine. Locally the tests run fine.
Additionally I ran the test in CI again. While originally it failed in wasi-preview1-host-in-preview2, it looks like in the latest run it now failed in wasi-http. (neither one crashes natively or on QEMU in my machine).
I also ran a CI run with 1.71 beta, and it looks like its fixed as you mentioned.
Alex Crichton (Jun 03 2023 at 17:30):Oh did you disable incremental and debuginfo and enable optimizations locally?
Alex Crichton (Jun 03 2023 at 17:31):CI is a bit funky in that regard
Afonso Bordado (Jun 03 2023 at 17:32):Huh, I didn't know we did that. I'll try that again at least as a sanity check that my setup is working
lqd (Jun 03 2023 at 20:22):Afonso Bordado said:
afonso@starfive:~/git/wasmtime$ ls ~/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/bin/ cargo cargo-clippy cargo-fmt clippy-driver rust-gdb rust-gdbgui rust-lldb rustc rustdoc rustfmt
(note that this is not where rust-lld would be located, but somewhere like ~/.rustup/toolchains/stable-riscv64gc-unknown-linux-gnu/lib/rustlib/riscv64gc-unknown-linux-gnu/bin/ but I don't believe it's distributed for that target yet)
Last updated: Oct 23 2024 at 20:03 UTC