utils

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)