runtime: hangs on windows with golang >= 1.14

[suikast42]

Does this issue reproduce with the latest release?

Yes.
Works with v <1.14. Last working version is 1.13.15

What operating system and processor architecture are you using (go env)?

go env Output

set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\IDE\Programme\go\cache
set GOENV=C:\IDE\Programme\go\env
set GOEXE=.exe
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\IDE\Programme\go\path
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\IDE\Programme\go\go114
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=C:\IDE\Programme\go\go114\pkg\tool\windows_amd64
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=C:\IDE\Projects_Git\playground\go\examples\go.mod
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\IDE\Programme\go\tmp\go-build087442934=/tmp/go-build -gno-record-gcc-switches

What did you do?

create a simple hello world program
hello

• main
  • main.go

go run main.go runs every time as expected ( with go v 1.13.15)

But with go v > 1.14 it runs rarely. That means 99% of the cases it hangs.
After the hanging I can't interrupt the cmd window with Ctrl+C. So I must kill the cmd process. over the task manager.

I had an eye to the MCAfee Scanner. I let it deinstall from our IT-Department for testing. But the result was the same. Nothing changed.

Windows defender is disabled.

That's my output with the -x flag

go run -x main.go Output

C:\IDE\Projects_Git\playground\go\hello\main>go run -x main.go

WORK=C:\IDE\Programme\go\tmp\go-build432668794

After this output the run command hangs

What I have testet?

1. Deinstall MCAfee
2. Run command as Administrator
3. Set all path variables to C:\IDE... ( this area is not touched from MCAfee )
4. Testest not working versions 1.14 - 1.17

[D1CED]

This could be an issue with async preemtion of goroutines added in go1.14. Try running your binaries with GODEBUG=asyncpreemptoff=1 set.

[suikast42]

This could be an issue with async preemtion of goroutines added in go1.14. Try running your binaries with GODEBUG=asyncpreemptoff=1 set.

That's works as expected.

I found out that's works as well if I set GOMAXPROCS=1. What is the better workaround for that issue?

[D1CED]

Hi, I suggest you to keep this issue open for the Go team to see. Async preemtion not working properly is for sure a bug (in the runtime or OS or somewhere else) and people should not be expected to fall back to workarounds.

[suikast42]

and people should not be expected to fall back to workarounds.

Agree. My bad ;-)

[cherrymui]

Maybe related to #36492.

@suikast42 Is it always hang or sometimes? Would it be possible for you to capture the program's state when it hangs?

cc @aclements @alexbrainman

[suikast42]

@suikast42 Is it always hang or sometimes?

cc @aclements @alexbrainman

Somtimes it works :-D

Would it be possible for you to capture the program's state when it hangs?

cc @aclements @alexbrainman

Sure. If you tell me how.

[alexbrainman]

Maybe related to #36492.

It could well be the same. #36492 is still broken for me as you can see from #36492 (comment).

Sure. If you tell me how.

@suikast42 what I do is I use Process Explorer program to see what happens to the Go programs (like go.exe and compile.exe and link.exe) that build my program. See #36492 (comment) for a screenshot of what I see. If you see some of Go build tools processes start and never exit, then you would have the same problem.

You can get Process Explorer from https://docs.microsoft.com/en-us/sysinternals/downloads/process-explorer

Alex

[suikast42]

Here is a dump from Process Explorer. I hope that is what you mean.

go.zip