addons/openssl-binding/test very flaky on ARM

[rvagg]

(Edit: see comment below for recommendations if you are running into related problems on your ARMv7 platforms)

arm-fanned has been offline for quite some time now since they've needed some heavy work, nodejs/build#1840

but I'm bringing them back online now, and it seems that at least one thing has crept in while it was offline. addons/openssl-binding/test is flaky on the Pi 3's. So far I've only seen it fail there but it could be elsewhere too, there haven't been enough runs to be sure.

Error output (@guybedford's run just now) from https://ci.nodejs.org/job/node-test-binary-arm-12+/2928/

Error in out/Release/node': corrupted double-linked list: 0x045ed160`

/cc @addaleax and @danbev since e66a2ac looks like a possible candidate.

[addaleax]

@rvagg Is there anything in particular that makes you suspect that commit?

[addaleax]

valgrind doesn’t report anything suspicious for me.

Can you maybe point me to a host where this reproduces consistently on which I could debug?

[rvagg]

@addaleax a very rough guess points me to that commit. arm-fanned has been offline since about July so I was looking at the history of openssl-binding during that time and that's it: https://github.com/nodejs/node/commits/master/test/addons/openssl-binding

Of course it could be elsewhere, or in OpenSSL itself. I'll try and get you instructions for getting in and reproducing but it's a pretty complicated setup for both getting in and running stuff, so give me some time to sort that out. It will probably be made easier when you have nodejs/build onboarding and have your .ssh/config setup properly from Ansible so you have ip addresses, ssh keys and jump hosts all configured for you.

[richardlau]

Opened a PR to mark the test flaky for now: #30838