erigon-pulse/tests/vm_test_util.go
Jeffrey Wilcke 3fc7c97827 core, core/vm: implemented a generic environment (#3348)
Environment is now a struct (not an interface). This
reduces a lot of tech-debt throughout the codebase where a virtual
machine environment had to be implemented in order to test or run it.

The new environment is suitable to be used en the json tests, core
consensus and light client.
2016-12-06 02:16:03 +01:00

234 lines
5.8 KiB
Go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package tests
import (
"bytes"
"fmt"
"io"
"math/big"
"strconv"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/params"
)
func RunVmTestWithReader(r io.Reader, skipTests []string) error {
tests := make(map[string]VmTest)
err := readJson(r, &tests)
if err != nil {
return err
}
if err != nil {
return err
}
if err := runVmTests(tests, skipTests); err != nil {
return err
}
return nil
}
type bconf struct {
name string
precomp bool
jit bool
}
func BenchVmTest(p string, conf bconf, b *testing.B) error {
tests := make(map[string]VmTest)
err := readJsonFile(p, &tests)
if err != nil {
return err
}
test, ok := tests[conf.name]
if !ok {
return fmt.Errorf("test not found: %s", conf.name)
}
env := make(map[string]string)
env["currentCoinbase"] = test.Env.CurrentCoinbase
env["currentDifficulty"] = test.Env.CurrentDifficulty
env["currentGasLimit"] = test.Env.CurrentGasLimit
env["currentNumber"] = test.Env.CurrentNumber
env["previousHash"] = test.Env.PreviousHash
if n, ok := test.Env.CurrentTimestamp.(float64); ok {
env["currentTimestamp"] = strconv.Itoa(int(n))
} else {
env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
}
/*
if conf.precomp {
program := vm.NewProgram(test.code)
err := vm.AttachProgram(program)
if err != nil {
return err
}
}
*/
b.ResetTimer()
for i := 0; i < b.N; i++ {
benchVmTest(test, env, b)
}
return nil
}
func benchVmTest(test VmTest, env map[string]string, b *testing.B) {
b.StopTimer()
db, _ := ethdb.NewMemDatabase()
statedb := makePreState(db, test.Pre)
b.StartTimer()
RunVm(statedb, env, test.Exec)
}
func RunVmTest(p string, skipTests []string) error {
tests := make(map[string]VmTest)
err := readJsonFile(p, &tests)
if err != nil {
return err
}
if err := runVmTests(tests, skipTests); err != nil {
return err
}
return nil
}
func runVmTests(tests map[string]VmTest, skipTests []string) error {
skipTest := make(map[string]bool, len(skipTests))
for _, name := range skipTests {
skipTest[name] = true
}
for name, test := range tests {
if skipTest[name] {
glog.Infoln("Skipping VM test", name)
return nil
}
if err := runVmTest(test); err != nil {
return fmt.Errorf("%s %s", name, err.Error())
}
glog.Infoln("VM test passed: ", name)
//fmt.Println(string(statedb.Dump()))
}
return nil
}
func runVmTest(test VmTest) error {
db, _ := ethdb.NewMemDatabase()
statedb := makePreState(db, test.Pre)
// XXX Yeah, yeah...
env := make(map[string]string)
env["currentCoinbase"] = test.Env.CurrentCoinbase
env["currentDifficulty"] = test.Env.CurrentDifficulty
env["currentGasLimit"] = test.Env.CurrentGasLimit
env["currentNumber"] = test.Env.CurrentNumber
env["previousHash"] = test.Env.PreviousHash
if n, ok := test.Env.CurrentTimestamp.(float64); ok {
env["currentTimestamp"] = strconv.Itoa(int(n))
} else {
env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
}
var (
ret []byte
gas *big.Int
err error
logs vm.Logs
)
ret, logs, gas, err = RunVm(statedb, env, test.Exec)
// Compare expected and actual return
rexp := common.FromHex(test.Out)
if bytes.Compare(rexp, ret) != 0 {
return fmt.Errorf("return failed. Expected %x, got %x\n", rexp, ret)
}
// Check gas usage
if len(test.Gas) == 0 && err == nil {
return fmt.Errorf("gas unspecified, indicating an error. VM returned (incorrectly) successfull")
} else {
gexp := common.Big(test.Gas)
if gexp.Cmp(gas) != 0 {
return fmt.Errorf("gas failed. Expected %v, got %v\n", gexp, gas)
}
}
// check post state
for addr, account := range test.Post {
obj := statedb.GetStateObject(common.HexToAddress(addr))
if obj == nil {
continue
}
for addr, value := range account.Storage {
v := statedb.GetState(obj.Address(), common.HexToHash(addr))
vexp := common.HexToHash(value)
if v != vexp {
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())
}
}
}
// check logs
if len(test.Logs) > 0 {
lerr := checkLogs(test.Logs, logs)
if lerr != nil {
return lerr
}
}
return nil
}
func RunVm(statedb *state.StateDB, env, exec map[string]string) ([]byte, vm.Logs, *big.Int, error) {
chainConfig := &params.ChainConfig{
HomesteadBlock: params.MainNetHomesteadBlock,
DAOForkBlock: params.MainNetDAOForkBlock,
DAOForkSupport: true,
}
var (
to = common.HexToAddress(exec["address"])
from = common.HexToAddress(exec["caller"])
data = common.FromHex(exec["data"])
gas = common.Big(exec["gas"])
value = common.Big(exec["value"])
)
caller := statedb.GetOrNewStateObject(from)
vm.Precompiled = make(map[string]*vm.PrecompiledAccount)
environment, _ := NewEVMEnvironment(true, chainConfig, statedb, env, exec)
ret, err := environment.Call(caller, to, data, gas, value)
return ret, statedb.Logs(), gas, err
}