Date: Wed, 17 Aug 2022 10:28:41 +0300 From: Dmitry Chagin <dchagin@heemeyer.club> To: Alex Arslan <ararslan@comcast.net> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: Hang in futex wait with a Node.js binary in Linuxulator Message-ID: <YvyYqVQghwbj4CeU@heemeyer.club> In-Reply-To: <16777BDC-22D3-4ACC-95E8-95933D587341@comcast.net> References: <16777BDC-22D3-4ACC-95E8-95933D587341@comcast.net>
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On Mon, Aug 15, 2022 at 09:43:29PM -0700, Alex Arslan wrote: > Hi folks, > > I'm trying to run the Linux binary for Codecov's official coverage uploader (https://docs.codecov.com/docs/codecov-uploader <ihttps://docs.codecov.com/docs/codecov-uploader>) on FreeBSD via Linuxulator. It's a statically compiled Node.js application built with the Node.js package called pkg. The application's own verbose logging shows that it completes, but the process just hangs indefinitely, using 0 CPU and not letting go of its memory. With devel/linux-c7-strace, it appears it's getting stuck on: > > futex(0x8427f1b70, FUTEX_WAIT_PRIVATE, 2, NULL > > Too stuck to even finish printing the argument list or closing parenthesis, apparently! A Cirrus CI build log where I set the process to terminate via timeout is available at https://cirrus-ci.com/task/6610515924353024 <https://cirrus-ci.com/task/6610515924353024>; but it's actually reproducible for me locally with just > > curl -O https://uploader.codecov.io/latest/linux/codecov > chmod +x codecov > ./codecov -h > > Does anyone have any advice for how to debug this further? > hi, mostly by ktrace -di/kdump -HAR and see which uaddr wake-up missed, which freebsd version you are used?
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