os/exec: fatal error: runtime·unlock: lock count #30594
Description
What version of Go are you using (go version)?
$ go version go version go1.12 darwin/amd64
Does this issue reproduce with the latest release?
yes
What operating system and processor architecture are you using (go env)?
go env Output
$ go env GOARCH="amd64" GOBIN="" GOCACHE="/Users/leeleon/Library/Caches/go-build" GOEXE="" GOFLAGS="" GOHOSTARCH="amd64" GOHOSTOS="darwin" GOOS="darwin" GOPATH="/Users/leeleon/go" GOPROXY="" GORACE="" GOROOT="/usr/local/Cellar/go/1.12/libexec" GOTMPDIR="" GOTOOLDIR="/usr/local/Cellar/go/1.12/libexec/pkg/tool/darwin_amd64" GCCGO="gccgo" CC="clang" CXX="clang++" CGO_ENABLED="1" GOMOD="/Users/leeleon/go/src/test_aos9/go.mod" CGO_CFLAGS="-g -O2" CGO_CPPFLAGS="" CGO_CXXFLAGS="-g -O2" CGO_FFLAGS="-g -O2" CGO_LDFLAGS="-g -O2" PKG_CONFIG="pkg-config" GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/df/tbfwxrg54g98zctp_hjz0l1r0000gn/T/go-build076111302=/tmp/go-build -gno-record-gcc-switches -fno-common"
What did you do?
func main() {
for {
for i:=0;i<20;i++{
go func() {
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
cmd := exec.CommandContext(ctx,"ls")
stdout, err := cmd.StdoutPipe()
cmd.Start()
content, err := ioutil.ReadAll(stdout)
if err != nil {
fmt.Println(err)
}
err = cmd.Wait()
if err != nil {
fmt.Println(err)
}
fmt.Println(string(content))
}()
}
time.Sleep(time.Second*1)
}
}
-
build the code on Mac:
~CGO_ENABLED=0 GOOS=linux GOARCH=arm go build -
run the code at android phone(sony SO-01L aos9)
~uname -a
Linux localhost 4.9.112-perf+ #1 SMP PREEMPT Fri Dec 14 00:09:44 2018 aarch64
- err log:
fatal error: runtime·unlock: lock count
fatal: morestack on g0
SIGSEGV: segmentation violation
PC=0x64014 m=1 sigcode=1
goroutine 0 [idle]:
runtime.abort()
/usr/local/Cellar/go/1.12/libexec/src/runtime/asm_arm.s:801 +0x4
runtime.badmorestackg0()
/usr/local/Cellar/go/1.12/libexec/src/runtime/proc.go:435 +0x2c
runtime: unexpected return pc for runtime.printstring called from 0x18fc6c
stack: frame={sp:0x203e36c, fp:0x203e390} stack=[0x203e000,0x2040000)
0203e2ec: 00000000 00000000 00000000 00000000
0203e2fc: 00000000 00000000 00000000 00000000
What did you expect to see?
The problem is similar like #29173.
How can it be solved?