generator

Documentation

Overview

Package generator provides means to generate state tests for Ethereum.

Index

• func GenerateProgram(f *filler.Filler) (*fuzzing.GstMaker, []byte)
• func Probability(strat Strategy, sum int) byte
• type Environment
• type Jumptable
  • func NewJumptable(minDist uint64) *Jumptable
  • func (j *Jumptable) InsertJumps(bytecode []byte) []byte
  • func (j *Jumptable) Pop(pc uint64) uint64
  • func (j *Jumptable) Push(pc, dest uint64)
• type Strategy

Functions

func GenerateProgram

func GenerateProgram(f *filler.Filler) (*fuzzing.GstMaker, []byte)

GenerateProgram creates a new evm program and returns a gstMaker based on it as well as its program code.

func Probability

func Probability(strat Strategy, sum int) byte

Probability returns the probability of this strategy, given the sum of all strategies on scale 1-255.

Types

type Environment

type Environment struct {
	// contains filtered or unexported fields
}

type Jumptable

type Jumptable struct {
	// contains filtered or unexported fields
}

func NewJumptable

func NewJumptable(minDist uint64) *Jumptable

NewJumptable creates a new Jumptable with a minimum jump distance.

func (*Jumptable) InsertJumps

func (j *Jumptable) InsertJumps(bytecode []byte) []byte

func (*Jumptable) Pop

func (j *Jumptable) Pop(pc uint64) uint64

Pop stores where a destination from the jumptable is needed. Returns a full uint64 as a placeholder

func (*Jumptable) Push

func (j *Jumptable) Push(pc, dest uint64)

Push pushes a new destination on the jumptable.

type Strategy

type Strategy interface {
	// Execute executes the strategy.
	// adds the resulting opcodes to the program.
	Execute(env Environment)
	// Importance returns the importance of this strategy.
	// This is needed to calculate the probability of this strategy.
	// Should be on a scale of 1-100.
	Importance() int
}