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Merge pull request #5 from PAMunb/distance-coverage-orderer
Distance coverage orderer
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package fuzz | ||
|
|
||
| import ( | ||
| "math" | ||
| "sort" | ||
|
|
||
| "github.com/dogefuzz/dogefuzz/pkg/dto" | ||
| ) | ||
|
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| type distanceCoverageBasedOrderer struct { | ||
| contract *dto.ContractDTO | ||
| } | ||
|
|
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| func newDistanceCoverageBasedOrderer(contract *dto.ContractDTO) *distanceCoverageBasedOrderer { | ||
| return &distanceCoverageBasedOrderer{contract} | ||
| } | ||
|
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| func (o *distanceCoverageBasedOrderer) OrderTransactions(transactions []*dto.TransactionDTO) { | ||
| sort.SliceStable(transactions, func(i, j int) bool { | ||
| return o.computeScore(transactions[i]) > o.computeScore(transactions[j]) | ||
| }) | ||
| } | ||
|
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| func (o *distanceCoverageBasedOrderer) computeScore(transaction *dto.TransactionDTO) float64 { | ||
| return math.Max(o.computeCriticalInstructionsHits(transaction), math.Max(o.computeCoverage(transaction), o.computeDistance(transaction))) | ||
| } | ||
|
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| func (o *distanceCoverageBasedOrderer) computeCoverage(transaction *dto.TransactionDTO) float64 { | ||
| var totalInstructions = len(o.contract.CFG.Instructions) | ||
| var executedInstructions = len(transaction.ExecutedInstructions) | ||
|
|
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| if totalInstructions != 0 { | ||
| return float64(executedInstructions) / float64(totalInstructions) | ||
| } | ||
|
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| return 0 | ||
| } | ||
|
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| func (o *distanceCoverageBasedOrderer) computeDistance(transaction *dto.TransactionDTO) float64 { | ||
| var maxDistance map[string]uint32 | ||
| var distanceSum int64 = 0 | ||
| var distancePercentage float64 = 0 | ||
| var minDistance uint64 = transaction.DeltaMinDistance | ||
|
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| for _, distance := range o.contract.DistanceMap { | ||
| if maxDistance == nil { | ||
| maxDistance = make(map[string]uint32) | ||
| for pc := range distance { | ||
| maxDistance[pc] = 0 | ||
| } | ||
| } | ||
|
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| for instr := range maxDistance { | ||
| if val, ok := distance[instr]; ok { | ||
| if val != math.MaxUint32 && val > maxDistance[instr] { | ||
| maxDistance[instr] = val | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
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| for _, distance := range maxDistance { | ||
| distanceSum += int64(distance) | ||
| } | ||
|
|
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| if minDistance >= uint64(math.MaxUint32) { | ||
| minDistance -= math.MaxUint32 | ||
| } | ||
|
|
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| if distanceSum != 0 { | ||
| distancePercentage = float64(minDistance) / float64(distanceSum) | ||
| } | ||
|
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| return distancePercentage | ||
| } | ||
|
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| func (o *distanceCoverageBasedOrderer) computeCriticalInstructionsHits(transaction *dto.TransactionDTO) float64 { | ||
| if o.contract.TargetInstructionsFreq != 0 { | ||
| return float64(transaction.CriticalInstructionsHits) / float64(o.contract.TargetInstructionsFreq) | ||
| } | ||
|
|
||
| return 0 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| package fuzz | ||
|
|
||
| import ( | ||
| "strings" | ||
|
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| "github.com/dogefuzz/dogefuzz/pkg/common" | ||
| "github.com/dogefuzz/dogefuzz/pkg/interfaces" | ||
| "github.com/ethereum/go-ethereum/accounts/abi" | ||
| ) | ||
|
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| // This is temporally, it is like 'directed_greybox' but with another strategy to order seeds | ||
| type otherDirectedGreyboxFuzzer struct { | ||
| powerSchedule interfaces.PowerSchedule | ||
|
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| solidityService interfaces.SolidityService | ||
| functionService interfaces.FunctionService | ||
| contractService interfaces.ContractService | ||
| } | ||
|
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| func NewOtherDirectedGreyboxFuzzer(e env) *otherDirectedGreyboxFuzzer { | ||
| return &otherDirectedGreyboxFuzzer{ | ||
| powerSchedule: e.PowerSchedule(), | ||
| solidityService: e.SolidityService(), | ||
| functionService: e.FunctionService(), | ||
| contractService: e.ContractService(), | ||
| } | ||
| } | ||
|
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| func (f *otherDirectedGreyboxFuzzer) GenerateInput(functionId string) ([]interface{}, error) { | ||
| function, err := f.functionService.Get(functionId) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| contract, err := f.contractService.Get(function.ContractId) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| abiDefinition, err := abi.JSON(strings.NewReader(contract.AbiDefinition)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| method := abiDefinition.Methods[function.Name] | ||
|
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| seedsList, err := f.powerSchedule.RequestSeeds(functionId, common.DISTANCE_COVERAGE_BASED_STRATEGY) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| chosenSeeds := common.RandomChoice(seedsList) | ||
|
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| inputs := make([]interface{}, len(method.Inputs)) | ||
| for inputsIdx, inputDefinition := range method.Inputs { | ||
| handler, err := f.solidityService.GetTypeHandlerWithContext(inputDefinition.Type) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| handler.SetValue(chosenSeeds[inputsIdx]) | ||
| mutationFunction := common.RandomChoice(handler.GetMutators()) | ||
| mutationFunction() | ||
| inputs[inputsIdx] = handler.GetValue() | ||
| } | ||
|
|
||
| return inputs, nil | ||
| } |
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