x/sys: Incorrect results in VirtualBox

[mixmind]

What version of Go are you using (go version)?

$ go version
go version go1.16.9 linux/amd64

Does this issue reproduce with the latest release?

Didn't checked

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

go env Output

$ go env
 GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/dba/.cache/go-build"
GOENV="/home/dba/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/dba/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/dba/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.16.9"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/mnt/projects/test/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 -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build2403385863=/tmp/go-build -gno-record-gcc-switches"

What did you do?

I'm tryint to figure out why IO count not working on virtual machine like VirtualBox or VMWare. On Dedicated Windows server it works as expected.

Code example

// +build windows
package main
import (

"fmt"

"syscall"

"unsafe"
"golang.org/x/sys/windows"

)
type diskPerformance struct {

BytesRead           int64

BytesWritten        int64

ReadTime            int64

WriteTime           int64

IdleTime            int64

ReadCount           uint32

WriteCount          uint32

QueueDepth          uint32

SplitCount          uint32

QueryTime           int64

StorageDeviceNumber uint32

StorageManagerName  [8]uint16

alignmentPadding    uint32 // necessary for 32bit support, see elastic/beats#16553

}
func main() {

maps()

}

func maps() {

var diskPerformance diskPerformance

lpBuffer := make([]uint16, 254)

lpBufferLen, err := windows.GetLogicalDriveStrings(uint32(len(lpBuffer)), &lpBuffer[0])

if err != nil {

fmt.Println("1", err)

return

}

for _, v := range lpBuffer[:lpBufferLen] {

if 'A' <= v && v <= 'Z' {

path := string(rune(v)) + ":"

typepath, _ := windows.UTF16PtrFromString(path)

typeret := windows.GetDriveType(typepath)

if typeret == 0 {

fmt.Println("2", windows.GetLastError())

return

}

if typeret != windows.DRIVE_FIXED {

continue

}

szDevice := fmt.Sprintf(\\.\%s, path)

const IOCTL_DISK_PERFORMANCE = 0x70020

h, err := windows.CreateFile(syscall.StringToUTF16Ptr(szDevice), 0, windows.FILE_SHARE_READ|windows.FILE_SHARE_WRITE, nil, windows.OPEN_EXISTING, 0, 0)

if err != nil {

fmt.Println("3", err)

if err == windows.ERROR_FILE_NOT_FOUND {

continue

}

return

}

defer windows.CloseHandle(h)

var diskPerformanceSize uint32

err = windows.DeviceIoControl(h, IOCTL_DISK_PERFORMANCE, nil, 0, (*byte)(unsafe.Pointer(&diskPerformance)), uint32(unsafe.Sizeof(diskPerformance)), &diskPerformanceSize, nil)

if err != nil {

fmt.Println("4", err)

return

}

fmt.Println(diskPerformanceSize)

}

}

return

}

What did you expect to see?

Execution without errors

What did you see instead?

Error in windows.DeviceIoControl

[cagedmantis]

/cc @hyangah