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runtime: intermittent os/exec.Command.Start() Hang on Darwin in Presence of "plugin" Package [1.16 backport] #50245

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gopherbot opened this issue Dec 17, 2021 · 3 comments
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runtime: intermittent os/exec.Command.Start() Hang on Darwin in Presence of "plugin" Package [1.16 backport] #50245

gopherbot opened this issue Dec 17, 2021 · 3 comments
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CherryPickApproved Used during the release process for point releases FrozenDueToAge
Milestone
Go1.16.14

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@gopherbot
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@cherrymui requested issue #38824 to be considered for backport to the next 1.16 minor release.

@gopherbot please backport this to previous releases. This can cause program that uses plugins to hang on macOS.
@gopherbot gopherbot added the CherryPickCandidate Used during the release process for point releases label Dec 17, 2021
@gopherbot gopherbot mentioned this issue Dec 17, 2021
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@gopherbot gopherbot added this to the Go1.16.13 milestone Dec 17, 2021
@gopherbot
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Change https://golang.org/cl/373095 mentions this issue: [release-branch.go1.16] cmd/link: force eager binding when using plugins on darwin

@cagedmantis
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This is a serious issue without a workaround.

@cagedmantis cagedmantis added the CherryPickApproved Used during the release process for point releases label Jan 5, 2022
@gopherbot gopherbot removed the CherryPickCandidate Used during the release process for point releases label Jan 5, 2022
@cagedmantis cagedmantis modified the milestones: Go1.16.13, Go1.16.14 Jan 6, 2022
gopherbot pushed a commit that referenced this issue Feb 7, 2022
@cherrymui
[release-branch.go1.16] cmd/link: force eager binding when using plug…
5ef9566 
…ins on darwin

When building/using plugins on darwin, we need to use flat
namespace so the same symbol from the main executable and the
plugin can be resolved to the same address. Apparently, when using
flat namespace the dynamic linker can hang at forkExec when
resolving a lazy binding. Work around it by forcing early bindings.

Updates #38824.
Fixes #50245.

Change-Id: I983aa0a0960b15bf3f7871382e8231ee244655f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/372798
Trust: Cherry Mui <[email protected]>
Reviewed-by: Than McIntosh <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Run-TryBot: Cherry Mui <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
(cherry picked from commit c5fee93)
Reviewed-on: https://go-review.googlesource.com/c/go/+/373095
@gopherbot
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Closed by merging 5ef9566 to release-branch.go1.16.

@golang golang locked and limited conversation to collaborators Feb 7, 2023
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