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runtime: fatal errors on dragonfly #13947

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mikioh opened this issue Jan 14, 2016 · 12 comments
Closed

runtime: fatal errors on dragonfly #13947

mikioh opened this issue Jan 14, 2016 · 12 comments
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FrozenDueToAge OS-Dragonfly
Milestone
Go1.6

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@mikioh
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mikioh commented Jan 14, 2016

The recent logs display the following:
@mikioh mikioh added this to the Go1.6 milestone Jan 14, 2016
@bradfitz
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It seems that dragonfly was still happy until @ianlancetaylor's recent a7cad52 (runtime: preserve signal stack when calling Go on C thread).

Ian, can you take a look?

@ianlancetaylor
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I'm not sure I would single out that particular change. After that change, the builder consistently timed out and looked flaky. The first time I see an error other than a timeout or a SIGTRAP signal was in http://build.golang.org/log/d8be87e27545cca84e8d0721c7b663ddb15ac7e4 for the change d75acd6 (which was clearly not the cause). So I think the error could have been introduced anywhere between those two changes, which is unfortunately a fair amount of ground.

@mikioh mikioh mentioned this issue Jan 14, 2016
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@ianlancetaylor
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I've been trying to figure out this by deduction and by looking at the source code, but no luck. gomote doesn't support DragonFly. @mikioh is there a way I can ssh on to your Dragonfly system and run tests?

@mikioh
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mikioh commented Jan 17, 2016

@ianlancetaylor,

Sorry I cannot provide you with easy access to my netbsd/dragonfly VMs. I'm happy to try your patch for investigation if you can send it me off-list.

@ianlancetaylor
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@mikioh I don't have a patch. I don't understand how these errors are possible. I need to have a system that I can use to investigate the problem interactively.

@kaey
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kaey commented Jan 20, 2016

62c280a - builds ok
a7cad52 - fatal error: unexpected signal during runtime execution
I've emailed credentials for a dragonfly-current server to @ianlancetaylor

@mikioh
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mikioh commented Jan 20, 2016

Thanks. I think I've found out the root cause of this issue: https://go-review.googlesource.com/#/c/18715.

@kaey
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kaey commented Jan 20, 2016

@mikioh All tests passed with your patch applied. Thanks.

% uname -a
DragonFly kulikov-dragonfly.naukanet.ru 4.5-DEVELOPMENT DragonFly v4.5.0.377.g8b5a57-DEVELOPMENT #1: Wed Jan 20 15:49:06 MSK 2016     root@kulikov-dragonfly.naukanet.ru:/usr/obj/usr/src/sys/X86_64_GENERIC  x86_64

@gopherbot
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CL https://golang.org/cl/18716 mentions this issue.

@gopherbot
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CL https://golang.org/cl/18776 mentions this issue.

@gopherbot
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CL https://golang.org/cl/18814 mentions this issue.

@gopherbot
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CL https://golang.org/cl/29971 mentions this issue.

gopherbot pushed a commit that referenced this issue Sep 28, 2016
@cixtor
runtime, runtime/cgo: revert CL 18814; don't drop signal stack in new…
a0d330f 
… thread on dragonfly

This change reverts CL 18814 which is a workaroud for older DragonFly
BSD kernels, and fixes #13945 and #13947 in a more general way the
same as other platforms except NetBSD.

This is a followup to CL 29491.

Updates #16329.

Change-Id: I771670bc672c827f2b3dbc7fd7417c49897cb991
Reviewed-on: https://go-review.googlesource.com/29971
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
@golang golang locked and limited conversation to collaborators Sep 28, 2017
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