mirror of
https://github.com/ethereum/go-ethereum.git
synced 2026-07-26 06:36:43 +00:00
64ac1ec1d7
Renamed Environment to EVM and EVM to Interpreter. The rational behind this that the Environment used to be an interface and had multiple implementations across the code base. All of the logic implemented in the Environment is part of the EVM. The old EVM is actually the interpreter, which interprets the byte code. The old EVM is part of the EVM as a whole.
99 lines
3.6 KiB
Go
99 lines
3.6 KiB
Go
// Copyright 2016 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 vm
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import (
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"context"
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/params"
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)
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type dummyContractRef struct {
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calledForEach bool
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}
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func (dummyContractRef) ReturnGas(*big.Int) {}
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func (dummyContractRef) Address() common.Address { return common.Address{} }
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func (dummyContractRef) Value() *big.Int { return new(big.Int) }
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func (dummyContractRef) SetCode(common.Hash, []byte) {}
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func (d *dummyContractRef) ForEachStorage(callback func(key, value common.Hash) bool) {
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d.calledForEach = true
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}
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func (d *dummyContractRef) SubBalance(amount *big.Int) {}
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func (d *dummyContractRef) AddBalance(amount *big.Int) {}
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func (d *dummyContractRef) SetBalance(*big.Int) {}
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func (d *dummyContractRef) SetNonce(uint64) {}
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func (d *dummyContractRef) Balance() *big.Int { return new(big.Int) }
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type dummyStateDB struct {
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NoopStateDB
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ref *dummyContractRef
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}
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func (d dummyStateDB) GetAccount(common.Address) Account {
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return d.ref
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}
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func TestStoreCapture(t *testing.T) {
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var (
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env = NewEVM(Context{Context: context.TODO()}, nil, params.TestChainConfig, Config{EnableJit: false, ForceJit: false})
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logger = NewStructLogger(nil)
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mem = NewMemory()
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stack = newstack()
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contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), new(big.Int))
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)
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stack.push(big.NewInt(1))
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stack.push(big.NewInt(0))
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var index common.Hash
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logger.CaptureState(env, 0, SSTORE, new(big.Int), new(big.Int), mem, stack, contract, 0, nil)
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if len(logger.changedValues[contract.Address()]) == 0 {
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t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(), len(logger.changedValues[contract.Address()]))
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}
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exp := common.BigToHash(big.NewInt(1))
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if logger.changedValues[contract.Address()][index] != exp {
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t.Errorf("expected %x, got %x", exp, logger.changedValues[contract.Address()][index])
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}
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}
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func TestStorageCapture(t *testing.T) {
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t.Skip("implementing this function is difficult. it requires all sort of interfaces to be implemented which isn't trivial. The value (the actual test) isn't worth it")
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var (
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ref = &dummyContractRef{}
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contract = NewContract(ref, ref, new(big.Int), new(big.Int))
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env = NewEVM(Context{Context: context.TODO()}, dummyStateDB{ref: ref}, params.TestChainConfig, Config{EnableJit: false, ForceJit: false})
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logger = NewStructLogger(nil)
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mem = NewMemory()
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stack = newstack()
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)
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logger.CaptureState(env, 0, STOP, new(big.Int), new(big.Int), mem, stack, contract, 0, nil)
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if ref.calledForEach {
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t.Error("didn't expect for each to be called")
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}
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logger = NewStructLogger(&LogConfig{FullStorage: true})
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logger.CaptureState(env, 0, STOP, new(big.Int), new(big.Int), mem, stack, contract, 0, nil)
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if !ref.calledForEach {
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t.Error("expected for each to be called")
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}
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}
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