05ade19302
* dashboard: footer, deep state update * dashboard: resolve asset path * dashboard: prevent state update on every reconnection * dashboard: fix linter issue * dashboard, cmd: minor UI fix, include commit hash * dashboard: gitCommit renamed to commit * dashboard: move the geth version to the right, make commit optional * dashboard: memory, traffic and CPU on footer * dashboard: fix merge * dashboard: CPU, diskIO on footer * dashboard: rename variables, use group declaration * dashboard: docs
386 lines
15 KiB
Go
386 lines
15 KiB
Go
package windows
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import (
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"fmt"
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"syscall"
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"time"
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"unsafe"
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"github.com/pkg/errors"
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)
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var (
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sizeofUint32 = 4
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sizeofProcessEntry32 = uint32(unsafe.Sizeof(ProcessEntry32{}))
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sizeofProcessMemoryCountersEx = uint32(unsafe.Sizeof(ProcessMemoryCountersEx{}))
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sizeofMemoryStatusEx = uint32(unsafe.Sizeof(MemoryStatusEx{}))
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)
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// Process-specific access rights. Others are declared in the syscall package.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684880(v=vs.85).aspx
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const (
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PROCESS_QUERY_LIMITED_INFORMATION uint32 = 0x1000
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PROCESS_VM_READ uint32 = 0x0010
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)
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// MAX_PATH is the maximum length for a path in Windows.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa365247(v=vs.85).aspx
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const MAX_PATH = 260
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// DriveType represents a type of drive (removable, fixed, CD-ROM, RAM disk, or
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// network drive).
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type DriveType uint32
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// Drive types as returned by GetDriveType.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364939(v=vs.85).aspx
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const (
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DRIVE_UNKNOWN DriveType = iota
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DRIVE_NO_ROOT_DIR
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DRIVE_REMOVABLE
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DRIVE_FIXED
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DRIVE_REMOTE
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DRIVE_CDROM
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DRIVE_RAMDISK
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)
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func (dt DriveType) String() string {
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names := map[DriveType]string{
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DRIVE_UNKNOWN: "unknown",
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DRIVE_NO_ROOT_DIR: "invalid",
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DRIVE_REMOVABLE: "removable",
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DRIVE_FIXED: "fixed",
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DRIVE_REMOTE: "remote",
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DRIVE_CDROM: "cdrom",
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DRIVE_RAMDISK: "ramdisk",
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}
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name, found := names[dt]
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if !found {
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return "unknown DriveType value"
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}
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return name
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}
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// Flags that can be used with CreateToolhelp32Snapshot.
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const (
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TH32CS_INHERIT uint32 = 0x80000000 // Indicates that the snapshot handle is to be inheritable.
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TH32CS_SNAPHEAPLIST uint32 = 0x00000001 // Includes all heaps of the process specified in th32ProcessID in the snapshot.
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TH32CS_SNAPMODULE uint32 = 0x00000008 // Includes all modules of the process specified in th32ProcessID in the snapshot.
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TH32CS_SNAPMODULE32 uint32 = 0x00000010 // Includes all 32-bit modules of the process specified in th32ProcessID in the snapshot when called from a 64-bit process.
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TH32CS_SNAPPROCESS uint32 = 0x00000002 // Includes all processes in the system in the snapshot.
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TH32CS_SNAPTHREAD uint32 = 0x00000004 // Includes all threads in the system in the snapshot.
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)
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// ProcessEntry32 is an equivalent representation of PROCESSENTRY32 in the
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// Windows API. It contains a process's information. Do not modify or reorder.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684839(v=vs.85).aspx
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type ProcessEntry32 struct {
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size uint32
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CntUsage uint32
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ProcessID uint32
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DefaultHeapID uintptr
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ModuleID uint32
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CntThreads uint32
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ParentProcessID uint32
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PriorityClassBase int32
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Flags uint32
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exeFile [MAX_PATH]uint16
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}
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// ExeFile returns the name of the executable file for the process. It does
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// not contain the full path.
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func (p ProcessEntry32) ExeFile() string {
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return syscall.UTF16ToString(p.exeFile[:])
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}
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func (p ProcessEntry32) String() string {
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return fmt.Sprintf("{CntUsage:%v ProcessID:%v DefaultHeapID:%v ModuleID:%v "+
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"CntThreads:%v ParentProcessID:%v PriorityClassBase:%v Flags:%v ExeFile:%v",
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p.CntUsage, p.ProcessID, p.DefaultHeapID, p.ModuleID, p.CntThreads,
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p.ParentProcessID, p.PriorityClassBase, p.Flags, p.ExeFile())
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}
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// MemoryStatusEx is an equivalent representation of MEMORYSTATUSEX in the
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// Windows API. It contains information about the current state of both physical
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// and virtual memory, including extended memory.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366770
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type MemoryStatusEx struct {
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length uint32
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MemoryLoad uint32
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TotalPhys uint64
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AvailPhys uint64
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TotalPageFile uint64
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AvailPageFile uint64
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TotalVirtual uint64
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AvailVirtual uint64
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AvailExtendedVirtual uint64
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}
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// ProcessMemoryCountersEx is an equivalent representation of
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// PROCESS_MEMORY_COUNTERS_EX in the Windows API.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684874(v=vs.85).aspx
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type ProcessMemoryCountersEx struct {
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cb uint32
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PageFaultCount uint32
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PeakWorkingSetSize uintptr
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WorkingSetSize uintptr
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QuotaPeakPagedPoolUsage uintptr
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QuotaPagedPoolUsage uintptr
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QuotaPeakNonPagedPoolUsage uintptr
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QuotaNonPagedPoolUsage uintptr
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PagefileUsage uintptr
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PeakPagefileUsage uintptr
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PrivateUsage uintptr
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}
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// GetLogicalDriveStrings returns a list of drives in the system.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364975(v=vs.85).aspx
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func GetLogicalDriveStrings() ([]string, error) {
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// Determine the size of the buffer required to receive all drives.
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bufferLength, err := _GetLogicalDriveStringsW(0, nil)
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if err != nil {
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return nil, errors.Wrap(err, "GetLogicalDriveStringsW failed to get buffer length")
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}
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if bufferLength < 0 {
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return nil, errors.New("GetLogicalDriveStringsW returned an invalid buffer length")
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}
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buffer := make([]uint16, bufferLength)
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_, err = _GetLogicalDriveStringsW(uint32(len(buffer)), &buffer[0])
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if err != nil {
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return nil, errors.Wrap(err, "GetLogicalDriveStringsW failed")
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}
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// Split the uint16 slice at null-terminators.
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var startIdx int
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var drivesUTF16 [][]uint16
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for i, value := range buffer {
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if value == 0 {
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drivesUTF16 = append(drivesUTF16, buffer[startIdx:i])
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startIdx = i + 1
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}
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}
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// Convert the utf16 slices to strings.
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drives := make([]string, 0, len(drivesUTF16))
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for _, driveUTF16 := range drivesUTF16 {
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if len(driveUTF16) > 0 {
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drives = append(drives, syscall.UTF16ToString(driveUTF16))
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}
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}
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return drives, nil
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}
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// GlobalMemoryStatusEx retrieves information about the system's current usage
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// of both physical and virtual memory.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366589(v=vs.85).aspx
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func GlobalMemoryStatusEx() (MemoryStatusEx, error) {
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memoryStatusEx := MemoryStatusEx{length: sizeofMemoryStatusEx}
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err := _GlobalMemoryStatusEx(&memoryStatusEx)
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if err != nil {
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return MemoryStatusEx{}, errors.Wrap(err, "GlobalMemoryStatusEx failed")
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}
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return memoryStatusEx, nil
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}
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// GetProcessMemoryInfo retrieves information about the memory usage of the
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// specified process.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms683219(v=vs.85).aspx
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func GetProcessMemoryInfo(handle syscall.Handle) (ProcessMemoryCountersEx, error) {
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processMemoryCountersEx := ProcessMemoryCountersEx{cb: sizeofProcessMemoryCountersEx}
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err := _GetProcessMemoryInfo(handle, &processMemoryCountersEx, processMemoryCountersEx.cb)
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if err != nil {
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return ProcessMemoryCountersEx{}, errors.Wrap(err, "GetProcessMemoryInfo failed")
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}
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return processMemoryCountersEx, nil
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}
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// GetProcessImageFileName Retrieves the name of the executable file for the
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// specified process.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms683217(v=vs.85).aspx
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func GetProcessImageFileName(handle syscall.Handle) (string, error) {
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buffer := make([]uint16, MAX_PATH)
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_, err := _GetProcessImageFileName(handle, &buffer[0], uint32(len(buffer)))
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if err != nil {
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return "", errors.Wrap(err, "GetProcessImageFileName failed")
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}
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return syscall.UTF16ToString(buffer), nil
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}
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// GetSystemTimes retrieves system timing information. On a multiprocessor
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// system, the values returned are the sum of the designated times across all
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// processors. The returned kernel time does not include the system idle time.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724400(v=vs.85).aspx
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func GetSystemTimes() (idle, kernel, user time.Duration, err error) {
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var idleTime, kernelTime, userTime syscall.Filetime
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err = _GetSystemTimes(&idleTime, &kernelTime, &userTime)
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if err != nil {
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return 0, 0, 0, errors.Wrap(err, "GetSystemTimes failed")
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}
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idle = FiletimeToDuration(&idleTime)
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kernel = FiletimeToDuration(&kernelTime) // Kernel time includes idle time so we subtract it out.
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user = FiletimeToDuration(&userTime)
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return idle, kernel - idle, user, nil
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}
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// FiletimeToDuration converts a Filetime to a time.Duration. Do not use this
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// method to convert a Filetime to an actual clock time, for that use
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// Filetime.Nanosecond().
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func FiletimeToDuration(ft *syscall.Filetime) time.Duration {
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n := int64(ft.HighDateTime)<<32 + int64(ft.LowDateTime) // in 100-nanosecond intervals
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return time.Duration(n * 100)
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}
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// GetDriveType Determines whether a disk drive is a removable, fixed, CD-ROM,
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// RAM disk, or network drive. A trailing backslash is required on the
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// rootPathName.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364939
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func GetDriveType(rootPathName string) (DriveType, error) {
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rootPathNamePtr, err := syscall.UTF16PtrFromString(rootPathName)
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if err != nil {
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return DRIVE_UNKNOWN, errors.Wrapf(err, "UTF16PtrFromString failed for rootPathName=%v", rootPathName)
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}
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dt, err := _GetDriveType(rootPathNamePtr)
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if err != nil {
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return DRIVE_UNKNOWN, errors.Wrapf(err, "GetDriveType failed for rootPathName=%v", rootPathName)
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}
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return dt, nil
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}
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// EnumProcesses retrieves the process identifier for each process object in the
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// system. This function can return a max of 65536 PIDs. If there are more
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// processes than that then this will not return them all.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms682629(v=vs.85).aspx
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func EnumProcesses() ([]uint32, error) {
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enumProcesses := func(size int) ([]uint32, error) {
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var (
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pids = make([]uint32, size)
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sizeBytes = len(pids) * sizeofUint32
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bytesWritten uint32
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)
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err := _EnumProcesses(&pids[0], uint32(sizeBytes), &bytesWritten)
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pidsWritten := int(bytesWritten) / sizeofUint32
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if int(bytesWritten)%sizeofUint32 != 0 || pidsWritten > len(pids) {
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return nil, errors.Errorf("EnumProcesses returned an invalid bytesWritten value of %v", bytesWritten)
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}
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pids = pids[:pidsWritten]
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return pids, err
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}
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// Retry the EnumProcesses call with larger arrays if needed.
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size := 2048
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var pids []uint32
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for tries := 0; tries < 5; tries++ {
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var err error
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pids, err = enumProcesses(size)
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if err != nil {
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return nil, errors.Wrap(err, "EnumProcesses failed")
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}
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if len(pids) < size {
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break
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}
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// Increase the size the pids array and retry the enumProcesses call
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// because the array wasn't large enough to hold all of the processes.
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size *= 2
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}
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return pids, nil
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}
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// GetDiskFreeSpaceEx retrieves information about the amount of space that is
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// available on a disk volume, which is the total amount of space, the total
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// amount of free space, and the total amount of free space available to the
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// user that is associated with the calling thread.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364937(v=vs.85).aspx
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func GetDiskFreeSpaceEx(directoryName string) (freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes uint64, err error) {
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directoryNamePtr, err := syscall.UTF16PtrFromString(directoryName)
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if err != nil {
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return 0, 0, 0, errors.Wrapf(err, "UTF16PtrFromString failed for directoryName=%v", directoryName)
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}
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err = _GetDiskFreeSpaceEx(directoryNamePtr, &freeBytesAvailable, &totalNumberOfBytes, &totalNumberOfFreeBytes)
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if err != nil {
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return 0, 0, 0, err
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}
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return freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes, nil
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}
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// CreateToolhelp32Snapshot takes a snapshot of the specified processes, as well
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// as the heaps, modules, and threads used by these processes.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms682489(v=vs.85).aspx
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func CreateToolhelp32Snapshot(flags, pid uint32) (syscall.Handle, error) {
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h, err := _CreateToolhelp32Snapshot(flags, pid)
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if err != nil {
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return syscall.InvalidHandle, err
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}
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if h == syscall.InvalidHandle {
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return syscall.InvalidHandle, syscall.GetLastError()
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}
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return h, nil
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}
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// Process32First retrieves information about the first process encountered in a
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// system snapshot.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684834
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func Process32First(handle syscall.Handle) (ProcessEntry32, error) {
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processEntry32 := ProcessEntry32{size: sizeofProcessEntry32}
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err := _Process32First(handle, &processEntry32)
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if err != nil {
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return ProcessEntry32{}, errors.Wrap(err, "Process32First failed")
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}
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return processEntry32, nil
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}
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// Process32Next retrieves information about the next process recorded in a
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// system snapshot. When there are no more processes to iterate then
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// syscall.ERROR_NO_MORE_FILES is returned (use errors.Cause() to unwrap).
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms684836
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func Process32Next(handle syscall.Handle) (ProcessEntry32, error) {
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processEntry32 := ProcessEntry32{size: sizeofProcessEntry32}
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err := _Process32Next(handle, &processEntry32)
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if err != nil {
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return ProcessEntry32{}, errors.Wrap(err, "Process32Next failed")
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}
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return processEntry32, nil
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}
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// Use "GOOS=windows go generate -v -x ." to generate the source.
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// Add -trace to enable debug prints around syscalls.
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//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall_windows.go syscall_windows.go
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// Windows API calls
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//sys _GlobalMemoryStatusEx(buffer *MemoryStatusEx) (err error) = kernel32.GlobalMemoryStatusEx
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//sys _GetLogicalDriveStringsW(bufferLength uint32, buffer *uint16) (length uint32, err error) = kernel32.GetLogicalDriveStringsW
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//sys _GetProcessMemoryInfo(handle syscall.Handle, psmemCounters *ProcessMemoryCountersEx, cb uint32) (err error) = psapi.GetProcessMemoryInfo
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//sys _GetProcessImageFileName(handle syscall.Handle, outImageFileName *uint16, size uint32) (length uint32, err error) = psapi.GetProcessImageFileNameW
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//sys _GetSystemTimes(idleTime *syscall.Filetime, kernelTime *syscall.Filetime, userTime *syscall.Filetime) (err error) = kernel32.GetSystemTimes
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//sys _GetDriveType(rootPathName *uint16) (dt DriveType, err error) = kernel32.GetDriveTypeW
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//sys _EnumProcesses(processIds *uint32, sizeBytes uint32, bytesReturned *uint32) (err error) = psapi.EnumProcesses
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//sys _GetDiskFreeSpaceEx(directoryName *uint16, freeBytesAvailable *uint64, totalNumberOfBytes *uint64, totalNumberOfFreeBytes *uint64) (err error) = kernel32.GetDiskFreeSpaceExW
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//sys _Process32First(handle syscall.Handle, processEntry32 *ProcessEntry32) (err error) = kernel32.Process32FirstW
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//sys _Process32Next(handle syscall.Handle, processEntry32 *ProcessEntry32) (err error) = kernel32.Process32NextW
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//sys _CreateToolhelp32Snapshot(flags uint32, processID uint32) (handle syscall.Handle, err error) = kernel32.CreateToolhelp32Snapshot
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//sys _NtQuerySystemInformation(systemInformationClass uint32, systemInformation *byte, systemInformationLength uint32, returnLength *uint32) (ntstatus uint32, err error) = ntdll.NtQuerySystemInformation
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//sys _NtQueryInformationProcess(processHandle syscall.Handle, processInformationClass uint32, processInformation *byte, processInformationLength uint32, returnLength *uint32) (ntstatus uint32, err error) = ntdll.NtQueryInformationProcess
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//sys _LookupPrivilegeName(systemName string, luid *int64, buffer *uint16, size *uint32) (err error) = advapi32.LookupPrivilegeNameW
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//sys _LookupPrivilegeValue(systemName string, name string, luid *int64) (err error) = advapi32.LookupPrivilegeValueW
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//sys _AdjustTokenPrivileges(token syscall.Token, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) [true] = advapi32.AdjustTokenPrivileges
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