c12f4df910
Reworked the EVM gas instructions to use 64bit integers rather than arbitrary size big ints. All gas operations, be it additions, multiplications or divisions, are checked and guarded against 64 bit integer overflows. In additon, most of the protocol paramaters in the params package have been converted to uint64 and are now constants rather than variables. * common/math: added overflow check ops * core: vmenv, env renamed to evm * eth, internal/ethapi, les: unmetered eth_call and cancel methods * core/vm: implemented big.Int pool for evm instructions * core/vm: unexported intPool methods & verification methods * core/vm: added memoryGasCost overflow check and test
235 lines
5.9 KiB
Go
235 lines
5.9 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 tests
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import (
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"bytes"
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"fmt"
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"io"
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"math/big"
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"strconv"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/params"
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)
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func RunVmTestWithReader(r io.Reader, skipTests []string) error {
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tests := make(map[string]VmTest)
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err := readJson(r, &tests)
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if err != nil {
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return err
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}
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if err != nil {
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return err
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}
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if err := runVmTests(tests, skipTests); err != nil {
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return err
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}
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return nil
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}
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type bconf struct {
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name string
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precomp bool
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jit bool
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}
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func BenchVmTest(p string, conf bconf, b *testing.B) error {
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tests := make(map[string]VmTest)
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err := readJsonFile(p, &tests)
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if err != nil {
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return err
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}
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test, ok := tests[conf.name]
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if !ok {
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return fmt.Errorf("test not found: %s", conf.name)
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}
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env := make(map[string]string)
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env["currentCoinbase"] = test.Env.CurrentCoinbase
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env["currentDifficulty"] = test.Env.CurrentDifficulty
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env["currentGasLimit"] = test.Env.CurrentGasLimit
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env["currentNumber"] = test.Env.CurrentNumber
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env["previousHash"] = test.Env.PreviousHash
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if n, ok := test.Env.CurrentTimestamp.(float64); ok {
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env["currentTimestamp"] = strconv.Itoa(int(n))
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} else {
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env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
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}
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/*
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if conf.precomp {
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program := vm.NewProgram(test.code)
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err := vm.AttachProgram(program)
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if err != nil {
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return err
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}
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}
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*/
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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benchVmTest(test, env, b)
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}
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return nil
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}
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func benchVmTest(test VmTest, env map[string]string, b *testing.B) {
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b.StopTimer()
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db, _ := ethdb.NewMemDatabase()
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statedb := makePreState(db, test.Pre)
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b.StartTimer()
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RunVm(statedb, env, test.Exec)
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}
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func RunVmTest(p string, skipTests []string) error {
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tests := make(map[string]VmTest)
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err := readJsonFile(p, &tests)
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if err != nil {
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return err
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}
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if err := runVmTests(tests, skipTests); err != nil {
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return err
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}
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return nil
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}
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func runVmTests(tests map[string]VmTest, skipTests []string) error {
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skipTest := make(map[string]bool, len(skipTests))
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for _, name := range skipTests {
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skipTest[name] = true
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}
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for name, test := range tests {
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if skipTest[name] /*|| name != "exp0"*/ {
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glog.Infoln("Skipping VM test", name)
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continue
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}
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if err := runVmTest(test); err != nil {
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return fmt.Errorf("%s %s", name, err.Error())
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}
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glog.Infoln("VM test passed: ", name)
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//fmt.Println(string(statedb.Dump()))
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}
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return nil
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}
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func runVmTest(test VmTest) error {
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db, _ := ethdb.NewMemDatabase()
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statedb := makePreState(db, test.Pre)
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// XXX Yeah, yeah...
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env := make(map[string]string)
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env["currentCoinbase"] = test.Env.CurrentCoinbase
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env["currentDifficulty"] = test.Env.CurrentDifficulty
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env["currentGasLimit"] = test.Env.CurrentGasLimit
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env["currentNumber"] = test.Env.CurrentNumber
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env["previousHash"] = test.Env.PreviousHash
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if n, ok := test.Env.CurrentTimestamp.(float64); ok {
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env["currentTimestamp"] = strconv.Itoa(int(n))
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} else {
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env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
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}
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var (
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ret []byte
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gas *big.Int
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err error
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logs []*types.Log
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)
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ret, logs, gas, err = RunVm(statedb, env, test.Exec)
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// Compare expected and actual return
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rexp := common.FromHex(test.Out)
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if !bytes.Equal(rexp, ret) {
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return fmt.Errorf("return failed. Expected %x, got %x\n", rexp, ret)
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}
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// Check gas usage
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if len(test.Gas) == 0 && err == nil {
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return fmt.Errorf("gas unspecified, indicating an error. VM returned (incorrectly) successful")
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} else {
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gexp := common.Big(test.Gas)
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if gexp.Cmp(gas) != 0 {
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return fmt.Errorf("gas failed. Expected %v, got %v\n", gexp, gas)
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}
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}
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// check post state
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for addr, account := range test.Post {
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obj := statedb.GetStateObject(common.HexToAddress(addr))
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if obj == nil {
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continue
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}
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for addr, value := range account.Storage {
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v := statedb.GetState(obj.Address(), common.HexToHash(addr))
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vexp := common.HexToHash(value)
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if v != vexp {
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return fmt.Errorf("(%x: %s) storage failed. Expected %x, got %x (%v %v)\n", obj.Address().Bytes()[0:4], addr, vexp, v, vexp.Big(), v.Big())
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}
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}
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}
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// check logs
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if len(test.Logs) > 0 {
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lerr := checkLogs(test.Logs, logs)
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if lerr != nil {
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return lerr
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}
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}
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return nil
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}
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func RunVm(statedb *state.StateDB, env, exec map[string]string) ([]byte, []*types.Log, *big.Int, error) {
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chainConfig := ¶ms.ChainConfig{
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HomesteadBlock: params.MainNetHomesteadBlock,
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DAOForkBlock: params.MainNetDAOForkBlock,
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DAOForkSupport: true,
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}
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var (
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to = common.HexToAddress(exec["address"])
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from = common.HexToAddress(exec["caller"])
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data = common.FromHex(exec["data"])
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gas = common.Big(exec["gas"])
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value = common.Big(exec["value"])
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)
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caller := statedb.GetOrNewStateObject(from)
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vm.PrecompiledContracts = make(map[common.Address]vm.PrecompiledContract)
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environment, _ := NewEVMEnvironment(true, chainConfig, statedb, env, exec)
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ret, g, err := environment.Call(caller, to, data, gas.Uint64(), value)
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return ret, statedb.Logs(), new(big.Int).SetUint64(g), err
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}
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