781915f183
This CL makes several refactors: - Define a Tracer interface, implementing the `CaptureState` method - Add the VM environment as the first argument of `Tracer.CaptureState` - Rename existing functionality `StructLogger` an make it an implementation of `Tracer` - Delete `StructLogCollector` and make `StructLogger` collect the logs directly - Change all callers to use the new `StructLogger` where necessary and extract logs from that. - Deletes the apparently obsolete and likely nonfunctional 'TraceCall' from the eth API. Callers that only wish accumulated logs can use the `StructLogger` implementation straightforwardly. Callers that wish to efficiently capture VM traces and operate on them without excessive copying can now implement the `Tracer` interface to receive VM state at each step and do with it as they wish. This CL also removes the accumulation of logs from the vm.Environment; this was necessary as part of the refactor, but also simplifies it by removing a responsibility that doesn't directly belong to the Environment.
114 lines
3.8 KiB
Go
114 lines
3.8 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package runtime
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/vm"
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)
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// Env is a basic runtime environment required for running the EVM.
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type Env struct {
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ruleSet vm.RuleSet
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depth int
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state *state.StateDB
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origin common.Address
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coinbase common.Address
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number *big.Int
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time *big.Int
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difficulty *big.Int
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gasLimit *big.Int
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getHashFn func(uint64) common.Hash
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evm *vm.EVM
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}
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// NewEnv returns a new vm.Environment
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func NewEnv(cfg *Config, state *state.StateDB) vm.Environment {
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env := &Env{
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ruleSet: cfg.RuleSet,
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state: state,
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origin: cfg.Origin,
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coinbase: cfg.Coinbase,
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number: cfg.BlockNumber,
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time: cfg.Time,
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difficulty: cfg.Difficulty,
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gasLimit: cfg.GasLimit,
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}
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env.evm = vm.New(env, vm.Config{
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Debug: cfg.Debug,
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EnableJit: !cfg.DisableJit,
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ForceJit: !cfg.DisableJit,
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})
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return env
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}
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func (self *Env) RuleSet() vm.RuleSet { return self.ruleSet }
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func (self *Env) Vm() vm.Vm { return self.evm }
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func (self *Env) Origin() common.Address { return self.origin }
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func (self *Env) BlockNumber() *big.Int { return self.number }
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func (self *Env) Coinbase() common.Address { return self.coinbase }
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func (self *Env) Time() *big.Int { return self.time }
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func (self *Env) Difficulty() *big.Int { return self.difficulty }
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func (self *Env) Db() vm.Database { return self.state }
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func (self *Env) GasLimit() *big.Int { return self.gasLimit }
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func (self *Env) VmType() vm.Type { return vm.StdVmTy }
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func (self *Env) GetHash(n uint64) common.Hash {
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return self.getHashFn(n)
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}
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func (self *Env) AddLog(log *vm.Log) {
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self.state.AddLog(log)
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}
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func (self *Env) Depth() int { return self.depth }
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func (self *Env) SetDepth(i int) { self.depth = i }
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func (self *Env) CanTransfer(from common.Address, balance *big.Int) bool {
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return self.state.GetBalance(from).Cmp(balance) >= 0
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}
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func (self *Env) MakeSnapshot() vm.Database {
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return self.state.Copy()
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}
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func (self *Env) SetSnapshot(copy vm.Database) {
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self.state.Set(copy.(*state.StateDB))
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}
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func (self *Env) Transfer(from, to vm.Account, amount *big.Int) {
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core.Transfer(from, to, amount)
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}
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func (self *Env) Call(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
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return core.Call(self, caller, addr, data, gas, price, value)
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}
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func (self *Env) CallCode(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
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return core.CallCode(self, caller, addr, data, gas, price, value)
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}
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func (self *Env) DelegateCall(me vm.ContractRef, addr common.Address, data []byte, gas, price *big.Int) ([]byte, error) {
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return core.DelegateCall(self, me, addr, data, gas, price)
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}
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func (self *Env) Create(caller vm.ContractRef, data []byte, gas, price, value *big.Int) ([]byte, common.Address, error) {
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return core.Create(self, caller, data, gas, price, value)
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}
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