215 lines
7.0 KiB
Go
215 lines
7.0 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 vm
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import (
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"math/big"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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const maxRun = 1000
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func TestSegmenting(t *testing.T) {
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prog := NewProgram([]byte{byte(PUSH1), 0x1, byte(PUSH1), 0x1, 0x0})
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err := CompileProgram(prog)
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if err != nil {
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t.Fatal(err)
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}
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if instr, ok := prog.instructions[0].(pushSeg); ok {
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if len(instr.data) != 2 {
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t.Error("expected 2 element width pushSegment, got", len(instr.data))
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}
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} else {
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t.Errorf("expected instr[0] to be a pushSeg, got %T", prog.instructions[0])
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}
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prog = NewProgram([]byte{byte(PUSH1), 0x1, byte(PUSH1), 0x1, byte(JUMP)})
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err = CompileProgram(prog)
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if err != nil {
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t.Fatal(err)
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}
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if _, ok := prog.instructions[1].(jumpSeg); ok {
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} else {
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t.Errorf("expected instr[1] to be jumpSeg, got %T", prog.instructions[1])
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}
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prog = NewProgram([]byte{byte(PUSH1), 0x1, byte(PUSH1), 0x1, byte(PUSH1), 0x1, byte(JUMP)})
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err = CompileProgram(prog)
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if err != nil {
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t.Fatal(err)
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}
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if instr, ok := prog.instructions[0].(pushSeg); ok {
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if len(instr.data) != 2 {
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t.Error("expected 2 element width pushSegment, got", len(instr.data))
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}
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} else {
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t.Errorf("expected instr[0] to be a pushSeg, got %T", prog.instructions[0])
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}
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if _, ok := prog.instructions[2].(jumpSeg); ok {
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} else {
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t.Errorf("expected instr[1] to be jumpSeg, got %T", prog.instructions[1])
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}
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}
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func TestCompiling(t *testing.T) {
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prog := NewProgram([]byte{0x60, 0x10})
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err := CompileProgram(prog)
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if err != nil {
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t.Error("didn't expect compile error")
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}
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if len(prog.instructions) != 1 {
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t.Error("expected 1 compiled instruction, got", len(prog.instructions))
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}
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}
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func TestResetInput(t *testing.T) {
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var sender account
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env := NewEnv(&Config{EnableJit: true, ForceJit: true})
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contract := NewContract(sender, sender, big.NewInt(100), big.NewInt(10000), big.NewInt(0))
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contract.CodeAddr = &common.Address{}
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program := NewProgram([]byte{})
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RunProgram(program, env, contract, []byte{0xbe, 0xef})
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if contract.Input != nil {
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t.Errorf("expected input to be nil, got %x", contract.Input)
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}
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}
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func TestPcMappingToInstruction(t *testing.T) {
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program := NewProgram([]byte{byte(PUSH2), 0xbe, 0xef, byte(ADD)})
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CompileProgram(program)
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if program.mapping[3] != 1 {
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t.Error("expected mapping PC 4 to me instr no. 2, got", program.mapping[4])
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}
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}
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var benchmarks = map[string]vmBench{
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"pushes": vmBench{
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false, false, false,
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common.Hex2Bytes("600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01"), nil,
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},
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}
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func BenchmarkPushes(b *testing.B) {
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runVmBench(benchmarks["pushes"], b)
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}
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type vmBench struct {
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precompile bool // compile prior to executing
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nojit bool // ignore jit (sets DisbaleJit = true
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forcejit bool // forces the jit, precompile is ignored
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code []byte
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input []byte
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}
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type account struct{}
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func (account) SubBalance(amount *big.Int) {}
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func (account) AddBalance(amount *big.Int) {}
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func (account) SetAddress(common.Address) {}
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func (account) Value() *big.Int { return nil }
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func (account) SetBalance(*big.Int) {}
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func (account) SetNonce(uint64) {}
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func (account) Balance() *big.Int { return nil }
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func (account) Address() common.Address { return common.Address{} }
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func (account) ReturnGas(*big.Int, *big.Int) {}
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func (account) SetCode(common.Hash, []byte) {}
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func (account) ForEachStorage(cb func(key, value common.Hash) bool) {}
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func runVmBench(test vmBench, b *testing.B) {
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var sender account
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if test.precompile && !test.forcejit {
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NewProgram(test.code)
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}
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env := NewEnv(&Config{EnableJit: !test.nojit, ForceJit: test.forcejit})
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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context := NewContract(sender, sender, big.NewInt(100), big.NewInt(10000), big.NewInt(0))
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context.Code = test.code
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context.CodeAddr = &common.Address{}
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_, err := env.Vm().Run(context, test.input)
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if err != nil {
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b.Error(err)
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b.FailNow()
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}
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}
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}
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type Env struct {
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gasLimit *big.Int
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depth int
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evm *EVM
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}
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func NewEnv(config *Config) *Env {
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env := &Env{gasLimit: big.NewInt(10000), depth: 0}
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env.evm = New(env, *config)
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return env
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}
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func (self *Env) ChainConfig() *params.ChainConfig {
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return params.TestChainConfig
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}
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func (self *Env) Vm() Vm { return self.evm }
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func (self *Env) Origin() common.Address { return common.Address{} }
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func (self *Env) BlockNumber() *big.Int { return big.NewInt(0) }
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//func (self *Env) PrevHash() []byte { return self.parent }
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func (self *Env) Coinbase() common.Address { return common.Address{} }
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func (self *Env) SnapshotDatabase() int { return 0 }
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func (self *Env) RevertToSnapshot(int) {}
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func (self *Env) Time() *big.Int { return big.NewInt(time.Now().Unix()) }
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func (self *Env) Difficulty() *big.Int { return big.NewInt(0) }
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func (self *Env) Db() Database { return nil }
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func (self *Env) GasLimit() *big.Int { return self.gasLimit }
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func (self *Env) VmType() Type { return StdVmTy }
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func (self *Env) GetHash(n uint64) common.Hash {
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return common.BytesToHash(crypto.Keccak256([]byte(big.NewInt(int64(n)).String())))
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}
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func (self *Env) AddLog(log *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 true
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}
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func (self *Env) Transfer(from, to Account, amount *big.Int) {}
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func (self *Env) Call(caller ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
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return nil, nil
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}
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func (self *Env) CallCode(caller ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
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return nil, nil
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}
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func (self *Env) Create(caller ContractRef, data []byte, gas, price, value *big.Int) ([]byte, common.Address, error) {
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return nil, common.Address{}, nil
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}
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func (self *Env) DelegateCall(me ContractRef, addr common.Address, data []byte, gas, price *big.Int) ([]byte, error) {
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return nil, nil
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}
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