diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/vm/errors.go | 1 | ||||
| -rw-r--r-- | core/vm/logger.go | 11 | ||||
| -rw-r--r-- | core/vm/vm.go | 5 |
3 files changed, 14 insertions, 3 deletions
diff --git a/core/vm/errors.go b/core/vm/errors.go index 116fbe456..1766bf9fb 100644 --- a/core/vm/errors.go +++ b/core/vm/errors.go @@ -26,3 +26,4 @@ import ( var OutOfGasError = errors.New("Out of gas") var CodeStoreOutOfGasError = errors.New("Contract creation code storage out of gas") var DepthError = fmt.Errorf("Max call depth exceeded (%d)", params.CallCreateDepth) +var TraceLimitReachedError = errors.New("The number of logs reached the specified limit") diff --git a/core/vm/logger.go b/core/vm/logger.go index ae62b6b57..9e13d703b 100644 --- a/core/vm/logger.go +++ b/core/vm/logger.go @@ -42,6 +42,7 @@ type LogConfig struct { DisableStack bool // disable stack capture DisableStorage bool // disable storage capture FullStorage bool // show full storage (slow) + Limit int // maximum length of output, but zero means unlimited } // StructLog is emitted to the Environment each cycle and lists information about the current internal state @@ -64,7 +65,7 @@ type StructLog struct { // Note that reference types are actual VM data structures; make copies // if you need to retain them beyond the current call. type Tracer interface { - CaptureState(env Environment, pc uint64, op OpCode, gas, cost *big.Int, memory *Memory, stack *Stack, contract *Contract, depth int, err error) + CaptureState(env Environment, pc uint64, op OpCode, gas, cost *big.Int, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error } // StructLogger is an EVM state logger and implements Tracer. @@ -93,7 +94,12 @@ func NewStructLogger(cfg *LogConfig) *StructLogger { // captureState logs a new structured log message and pushes it out to the environment // // captureState also tracks SSTORE ops to track dirty values. -func (l *StructLogger) CaptureState(env Environment, pc uint64, op OpCode, gas, cost *big.Int, memory *Memory, stack *Stack, contract *Contract, depth int, err error) { +func (l *StructLogger) CaptureState(env Environment, pc uint64, op OpCode, gas, cost *big.Int, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error { + // check if already accumulated the specified number of logs + if l.cfg.Limit != 0 && l.cfg.Limit <= len(l.logs) { + return TraceLimitReachedError + } + // initialise new changed values storage container for this contract // if not present. if l.changedValues[contract.Address()] == nil { @@ -152,6 +158,7 @@ func (l *StructLogger) CaptureState(env Environment, pc uint64, op OpCode, gas, log := StructLog{pc, op, new(big.Int).Set(gas), cost, mem, stck, storage, env.Depth(), err} l.logs = append(l.logs, log) + return nil } // StructLogs returns a list of captured log entries diff --git a/core/vm/vm.go b/core/vm/vm.go index 205934822..09cddc2f8 100644 --- a/core/vm/vm.go +++ b/core/vm/vm.go @@ -188,7 +188,10 @@ func (evm *EVM) Run(contract *Contract, input []byte) (ret []byte, err error) { mem.Resize(newMemSize.Uint64()) // Add a log message if evm.cfg.Debug { - evm.cfg.Tracer.CaptureState(evm.env, pc, op, contract.Gas, cost, mem, stack, contract, evm.env.Depth(), nil) + err = evm.cfg.Tracer.CaptureState(evm.env, pc, op, contract.Gas, cost, mem, stack, contract, evm.env.Depth(), nil) + if err != nil { + return nil, err + } } if opPtr := evm.jumpTable[op]; opPtr.valid { |