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cmd/link: -buildmode=plugin fails on linux/arm64 #17138

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crawshaw opened this issue Sep 16, 2016 · 6 comments
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@crawshaw
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@crawshaw crawshaw commented Sep 16, 2016

At least on the builder, it tickles gold the wrong way:

/tmp/workdir/go/pkg/tool/linux_arm64/link: running gcc failed: exit status 1
/usr/bin/ld.gold: internal error in global, at ../../gold/aarch64.cc:4973

Odd, as the plugin mode mostly depends on linker configuration used by either c-shared or shared.
gopherbot pushed a commit that referenced this issue Sep 16, 2016
@crawshaw
cmd/dist: disable plugin test on arm64
569340e 
Mysterious error and no time or easy machine access to investigate
now, so disabling the -buildmode=plugin test on arm64. (The arm
version is working as expected.)

Updates #17138

Change-Id: I4cc56ddf47e7597213462e48d4934a765168bd07
Reviewed-on: https://go-review.googlesource.com/29363
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
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@mwhudson mwhudson commented Sep 18, 2016

Do you know which version of gold is installed?
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@mwhudson mwhudson commented Sep 18, 2016

If I revert 569340e it fails with:

##### ../misc/cgo/testplugin
fatal error: runtime: no plugin module data

goroutine 1 [running]:
runtime.throw(0x520f77, 0x1e)

do you know what's going on there?
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@crawshaw crawshaw commented Sep 19, 2016

Nope, I'd have to spend some time with an arm64 machine, and I don't think I'll get to it in 1.8. I'd rather just say we haven't implemented -buildmode=plugin there yet and deal with it in 1.9.
@quentinmit quentinmit added this to the Go1.8Maybe milestone Oct 3, 2016
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@quentinmit quentinmit commented Oct 3, 2016

We haven't made a Go1.9 milestone yet, so I'll tag this 1.8Maybe with the expectation that it's likely going to get punted.
@rsc rsc modified the milestones: Go1.9, Go1.8Maybe Oct 20, 2016
@AkihiroSuda AkihiroSuda mentioned this issue Mar 21, 2017
Merged
@bradfitz bradfitz modified the milestones: Go1.9, Go1.10 Jun 7, 2017
@rsc rsc modified the milestones: Go1.10, Go1.11 Nov 22, 2017
@glycerine glycerine mentioned this issue Mar 30, 2018
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@gopherbot gopherbot commented Apr 27, 2018

Change https://golang.org/cl/109917 mentions this issue: cmd/link: fix plugin on linux/arm64
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@cherrymui cherrymui commented Apr 27, 2018

With CL https://go-review.googlesource.com/c/go/+/109917, testplugin passes locally. It still fails on the builder with an internal error in gold.

##### ../misc/cgo/testplugin
# host
/workdir/go/pkg/tool/linux_arm64/link: running gcc failed: exit status 1
/usr/bin/ld.gold: internal error in global, at ../../gold/aarch64.cc:4973
collect2: error: ld returned 1 exit status

Seems the gold linker on the builder is rather old:

$ gomote run $VM /usr/bin/gold --version
GNU gold (GNU Binutils for Debian 2.25) 1.11
Copyright (C) 2014 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.

On the machine where the test passes:

$ gold --version
GNU gold (GNU Binutils for Ubuntu 2.26.1) 1.11
Copyright (C) 2015 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.

I wonder, could we update gold on the builder, and require a newer gold for using plugin on linux/arm64? cc @bradfitz
gopherbot pushed a commit that referenced this issue Apr 27, 2018
@cherrymui
cmd/link: fix plugin on linux/arm64
ceda47d 
The init function and runtime.addmoduledata were not added when
building plugin, which caused the runtime could not find the
module.

Testplugin is still not enabled on linux/arm64
(https://go.googlesource.com/go/+/master/src/cmd/dist/test.go#948)
because the gold linker on the builder is too old, which fails
with an internal error (see issue #17138). I tested locally and
it passes.

Fixes #24940.
Updates #17138.

Change-Id: I26aebca6c38a3443af0949471fa12b6d550e8c6c
Reviewed-on: https://go-review.googlesource.com/109917
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
@gopherbot gopherbot modified the milestones: Go1.11, Unplanned May 23, 2018
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