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Bug 1797127
| Summary: | Rust 1.41 fails to build on Fedora 30 i686 | ||||||
|---|---|---|---|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Josh Stone <jistone> | ||||
| Component: | llvm | Assignee: | Tom Stellard <tstellar> | ||||
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> | ||||
| Severity: | unspecified | Docs Contact: | |||||
| Priority: | unspecified | ||||||
| Version: | 30 | CC: | dmalcolm, igor.raits, jakub, jistone, rust-sig, scottt.tw, sean, sguelton, siddharth.kde, TicoTimo, tstellar | ||||
| Target Milestone: | --- | ||||||
| Target Release: | --- | ||||||
| Hardware: | i686 | ||||||
| OS: | Unspecified | ||||||
| Whiteboard: | |||||||
| Fixed In Version: | llvm-8.0.0-7.fc30 | Doc Type: | If docs needed, set a value | ||||
| Doc Text: | Story Points: | --- | |||||
| Clone Of: | Environment: | ||||||
| Last Closed: | 2020-02-27 22:05:42 UTC | Type: | Bug | ||||
| Regression: | --- | Mount Type: | --- | ||||
| Documentation: | --- | CRM: | |||||
| Verified Versions: | Category: | --- | |||||
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |||||
| Cloudforms Team: | --- | Target Upstream Version: | |||||
| Embargoed: | |||||||
| Attachments: |
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Description
Josh Stone
2020-02-01 00:21:28 UTC
Created attachment 1656893 [details]
llvm-ir for a 64-bit atomic_load_unordered
#![no_std]
#![crate_type = "lib"]
#![feature(core_intrinsics)]
#[no_mangle]
pub unsafe fn unordered_load(src: *const u64) {
core::intrinsics::atomic_load_unordered(src);
}
The attachment is the full llvm-ir for the given Rust code, basically just a 64-bit unordered load alone: %1 = load atomic i64, i64* %src unordered, align 8 Compiled with llc in llvm-8.0.0-6.fc30.i686: Stack dump: 0. Program arguments: llc load.ll 1. Running pass 'Function Pass Manager' on module 'load.ll'. 2. Running pass 'Expand Atomic instructions' on function '@unordered_load' #0 0xfffffffff3b29227 llvm::sys::PrintStackTrace(llvm::raw_ostream&) ../lib/Support/Unix/Signals.inc:499:3 #1 0xfffffffff3b29301 ../lib/Support/Unix/Signals.inc:559:1 #2 0xfffffffff3b27011 llvm::sys::RunSignalHandlers() ../lib/Support/Signals.cpp:69:20 #3 0xfffffffff3b27195 ../lib/Support/Unix/Signals.inc:348:31 #4 0xfffffffff7f9db70 (linux-gate.so.1+0xb70) #5 0xfffffffff393b6d0 ../include/llvm/IR/TrackingMDRef.h:34:48 #6 0xfffffffff393b6d0 ../include/llvm/IR/TrackingMDRef.h:115:62 #7 0xfffffffff393b6d0 ../include/llvm/IR/DebugLoc.h:34:9 #8 0xfffffffff393b6d0 ../include/llvm/IR/IRBuilder.h:147:30 #9 0xfffffffff393b6d0 expandAtomicCmpXchg ../lib/CodeGen/AtomicExpandPass.cpp:1246:27 #10 0xfffffffff633c02b (/lib/libLLVM-8.so+0x2fcb02b) Segmentation fault (core dumped) I can also confirm this with llvm8.0-8.0.0-11.fc31.x86_64: $ llc-8.0 load.ll Stack dump: 0. Program arguments: llc-8.0 load.ll 1. Running pass 'Function Pass Manager' on module 'load.ll'. 2. Running pass 'Expand Atomic instructions' on function '@unordered_load' #0 0x00007f92dc934d0e llvm::sys::PrintStackTrace(llvm::raw_ostream&) (/usr/lib64/llvm8.0/lib/libLLVM-8.so+0xabed0e) #1 0x00007f92dc932d84 llvm::sys::RunSignalHandlers() (/usr/lib64/llvm8.0/lib/libLLVM-8.so+0xabcd84) #2 0x00007f92dc932f05 (/usr/lib64/llvm8.0/lib/libLLVM-8.so+0xabcf05) #3 0x00007f92dbaef6b0 __restore_rt (/lib64/libc.so.6+0x3c6b0) #4 0x00007f92dc755172 (/usr/lib64/llvm8.0/lib/libLLVM-8.so+0x8df172) #5 0x00007ffdcbec1278 Segmentation fault (core dumped) It also crashes with llc-7.0, but llc from llvm-9.0.0-1.fc31.x86_64 is okay. I bisected to this: https://github.com/llvm/llvm-project/commit/2153c4b8281c1e5f25887ef9183947198c50a9d2 [AtomicExpand] Fix a crash bug when lowering unordered loads to cmpxchg Add tests for wider atomic loads and stores. In the process, fix a crasher where we appearently handled unorder stores, but not loads, when lowering to cmpxchg idioms. llvm-svn: 356482 I'd say that fits! FEDORA-2020-5739bd54c3 has been submitted as an update to Fedora 30. https://bodhi.fedoraproject.org/updates/FEDORA-2020-5739bd54c3 llvm-8.0.0-7.fc30, rust-1.41.0-1.fc30, rust-packaging-10-2.fc30 has been pushed to the Fedora 30 testing repository. If problems still persist, please make note of it in this bug report. See https://fedoraproject.org/wiki/QA:Updates_Testing for instructions on how to install test updates. You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2020-5739bd54c3 llvm-8.0.0-7.fc30, rust-1.41.0-1.fc30, rust-packaging-10-2.fc30 has been pushed to the Fedora 30 stable repository. If problems still persist, please make note of it in this bug report. The update reached stable a week ago. |