[llvm-dev] LLD WASM linker has a deadlock race condition bug

Andrew Kelley via llvm-dev llvm-dev at lists.llvm.org
Tue Apr 16 00:34:52 PDT 2019


I would like to bring attention to this bug report:

WebAssembly is getting quite some attention in the 8.0.0 release cycle
of LLVM thanks to the target being promoted to non-experimental.
Consequently the WASM linker code in LLD is getting some more broad testing.

In the Zig frontend I've added --no-threads for now, to work around the bug.

Please let me know if there is more information I can provide to help
diagnose and fix this bug in LLD. The repro case I uploaded in the issue
tracker triggers the deadlock about 1 in 6 times for me.


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