utils

Documentation

Index

• func ClearBit(n *uint64, offset uint)
• func ClearBits(n *uint64, mask uint64)
• func ClockTicksToNsSinceBootTime(ticks int64) uint64
• func CopyRegularFileByPath(src, dst string) error
• func CopyRegularFileByRelativePath(srcName string, dstDir *os.File, dstName string) error
• func CreateAt(dir *os.File, relativePath string) (*os.File, error)
• func Dup(file *os.File) (*os.File, error)
• func GenerateRandomDuration(min, max int) time.Duration
• func GetBootTime() time.Time
• func GetBootTimeNS() int64
• func GetStartTimeNS() int64
• func GetSystemHZ() int
• func GetUserHZ() int64
• func HasBit(n uint64, offset uint) bool
• func HashTaskID(arg1 uint32, arg2 uint64) uint32
• func HashU32AndU64(arg1 uint32, arg2 uint64) uint32
• func IsDirEmpty(pathname string) (bool, error)
• func Max(x, y uint64) uint64
• func Min(x, y uint64) uint64
• func MkdirAt(dir *os.File, relativePath string, perm fs.FileMode) error
• func MkdirAtExist(dir *os.File, relativePath string, perm fs.FileMode) error
• func Murmur32(key []byte) uint32
• func NsSinceBootTimeToTime(ns uint64) time.Time
• func OpenAt(dir *os.File, relativePath string, flags int, perm fs.FileMode) (*os.File, error)
• func OpenExistingDir(p string) (*os.File, error)
• func ParseSymbol(address uint64, table helpers.KernelSymbolTable) *helpers.KernelSymbol
• func RemoveAt(dir *os.File, relativePath string, flags int) error
• func RenameAt(olddir *os.File, oldpath string, newdir *os.File, newpath string) error
• func RoundToClosestN(val int, n int) int
• func SetBit(n *uint64, offset uint)

Functions

func ClearBit

func ClearBit(n *uint64, offset uint)

func ClearBits

func ClearBits(n *uint64, mask uint64)

func ClockTicksToNsSinceBootTime

func ClockTicksToNsSinceBootTime(ticks int64) uint64

ClockTicksToNsSinceBootTime converts kernel clock ticks to nanoseconds.

func CopyRegularFileByPath

func CopyRegularFileByPath(src, dst string) error

CopyRegularFileByPath copies a file from src to dst

func CopyRegularFileByRelativePath

func CopyRegularFileByRelativePath(srcName string, dstDir *os.File, dstName string) error

CopyRegularFileByRelativePath copies a file from src to dst, where destination is relative to a given directory. This function needs needed capabilities to be set before it is called.

func CreateAt

func CreateAt(dir *os.File, relativePath string) (*os.File, error)

CreateAt implements the same logic as os.Create using directory FD and relative path.

func Dup

func Dup(file *os.File) (*os.File, error)

Dup is a wrapper function to the `dup` syscall using golang types.

func GenerateRandomDuration

func GenerateRandomDuration(min, max int) time.Duration

GenerateRandomDuration returns a random duration between min and max, inclusive

func GetBootTime

func GetBootTime() time.Time

GetBootTime returns the boot time of the system in time.Time format.

func GetBootTimeNS

func GetBootTimeNS() int64

GetBootTimeNS returns the boot time of the system in nanoseconds.

func GetStartTimeNS

func GetStartTimeNS() int64

GetStartTimeNS returns the system start time in nanoseconds (using CLOCK_MONOTONIC).

func GetSystemHZ

func GetSystemHZ() int

GetSystemHZ returns an approximation of CONFIG_HZ (the kernel timer interrupt).

func GetUserHZ

func GetUserHZ() int64

GetUserHZ returns USER_HZ (the user-space timer interrupt), the system clock tick rate.

func HasBit

func HasBit(n uint64, offset uint) bool

func HashTaskID

func HashTaskID(arg1 uint32, arg2 uint64) uint32

func HashU32AndU64

func HashU32AndU64(arg1 uint32, arg2 uint64) uint32

HashU32AndU64 is a wrapper around Murmur32 making sure network byte order is used.

func IsDirEmpty

func IsDirEmpty(pathname string) (bool, error)

IsDirEmpty returns true if directory contains no files

func Max

func Max(x, y uint64) uint64

func Min

func Min(x, y uint64) uint64

func MkdirAt

func MkdirAt(dir *os.File, relativePath string, perm fs.FileMode) error

MkdirAt is a wrapper function to the `mkdirat` syscall using golang types.

func MkdirAtExist

func MkdirAtExist(dir *os.File, relativePath string, perm fs.FileMode) error

MkdirAtExist is a wrapper function to the `mkdirat` syscall using golang types, ignoring EEXIST error.

func Murmur32

func Murmur32(key []byte) uint32

Murmur32 is a Murmur3 32-bit hash function implementation.

func NsSinceBootTimeToTime

func NsSinceBootTimeToTime(ns uint64) time.Time

NsSinceBootTimeToTime converts nanoseconds timestamp (since boot) to a time.Time object.

func OpenAt

func OpenAt(dir *os.File, relativePath string, flags int, perm fs.FileMode) (*os.File, error)

OpenAt is a wrapper function to the `openat` syscall using golang types.

func OpenExistingDir

func OpenExistingDir(p string) (*os.File, error)

OpenExistingDir open a directory with given path, and return the os.File of it.

func ParseSymbol

func ParseSymbol(address uint64, table helpers.KernelSymbolTable) *helpers.KernelSymbol

func RemoveAt

func RemoveAt(dir *os.File, relativePath string, flags int) error

RemoveAt is a wrapper function to the `unlinkat` syscall using golang types.

func RenameAt

func RenameAt(olddir *os.File, oldpath string, newdir *os.File, newpath string) error

RenameAt is a wrapper function to the `renameat` syscall using golang types.

func RoundToClosestN

func RoundToClosestN(val int, n int) int

RoundToClosestN rounds a number to the closest multiple of n.

func SetBit

func SetBit(n *uint64, offset uint)