forked from cerc-io/plugeth
7a5b571c67
This implements a generic approach to enabling soft forks by allowing anyone to put in hashes of contracts that should not be interacted from. This will help "The DAO" in their endevour to stop any whithdrawals from any DAO contract by convincing the mining community to accept their code hash.
221 lines
7.1 KiB
Go
221 lines
7.1 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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)
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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(false, 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([]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(test.nojit, 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(noJit, forceJit bool) *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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EnableJit: !noJit,
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ForceJit: forceJit,
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})
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return env
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}
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func (self *Env) MarkCodeHash(common.Hash) {}
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func (self *Env) RuleSet() RuleSet { return ruleSet{new(big.Int)} }
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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) AddStructLog(log StructLog) {
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}
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func (self *Env) StructLogs() []StructLog {
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return nil
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}
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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) MakeSnapshot() Database { return nil }
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func (self *Env) SetSnapshot(Database) {}
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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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