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package vm
import (
"fmt"
"io/ioutil"
"log"
"math/big"
"os"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/trie"
checker "gopkg.in/check.v1"
// "github.com/obscuren/mutan"
)
type VmSuite struct{}
var _ = checker.Suite(&VmSuite{})
var big9 = ethutil.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000009")
const mutcode = `
var x = 0;
for i := 0; i < 10; i++ {
x = i
}
return x`
type TestEnv struct{}
func (TestEnv) Origin() []byte { return nil }
func (TestEnv) BlockNumber() *big.Int { return nil }
func (TestEnv) BlockHash() []byte { return nil }
func (TestEnv) PrevHash() []byte { return nil }
func (TestEnv) Coinbase() []byte { return nil }
func (TestEnv) Time() int64 { return 0 }
func (TestEnv) GasLimit() *big.Int { return nil }
func (TestEnv) Difficulty() *big.Int { return nil }
func (TestEnv) Value() *big.Int { return nil }
func (TestEnv) AddLog(*state.Log) {}
func (TestEnv) Transfer(from, to Account, amount *big.Int) error {
return nil
}
// This is likely to fail if anything ever gets looked up in the state trie :-)
func (TestEnv) State() *state.State {
return state.New(trie.New(nil, ""))
}
func setup(level logger.LogLevel, typ Type) (*Closure, VirtualMachine) {
code, err := ethutil.Compile(mutcode, true)
if err != nil {
log.Fatal(err)
}
// Pipe output to /dev/null
logger.AddLogSystem(logger.NewStdLogSystem(ioutil.Discard, log.LstdFlags, level))
ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
stateObject := state.NewStateObject([]byte{'j', 'e', 'f', 'f'})
callerClosure := NewClosure(nil, stateObject, stateObject, code, big.NewInt(1000000), big.NewInt(0))
return callerClosure, New(TestEnv{}, typ)
}
func (s *VmSuite) TestDebugVm(c *checker.C) {
// if mutan.Version < "0.6" {
// t.Skip("skipping for mutan version", mutan.Version, " < 0.6")
// }
closure, vm := setup(logger.DebugLevel, DebugVmTy)
ret, _, e := closure.Call(vm, nil)
c.Assert(e, checker.NotNil)
c.Skip("Depends on mutan")
c.Assert(ret, checker.DeepEquals, big9)
}
func (s *VmSuite) TestVm(c *checker.C) {
// if mutan.Version < "0.6" {
// t.Skip("skipping for mutan version", mutan.Version, " < 0.6")
// }
closure, vm := setup(logger.DebugLevel, StandardVmTy)
ret, _, e := closure.Call(vm, nil)
c.Assert(e, checker.NotNil)
c.Skip("Depends on mutan")
c.Assert(ret, checker.DeepEquals, big9)
}
func (s *VmSuite) BenchmarkDebugVm(c *checker.C) {
closure, vm := setup(logger.InfoLevel, StandardVmTy)
c.ResetTimer()
for i := 0; i < c.N; i++ {
closure.Call(vm, nil)
}
}
func (s *VmSuite) BenchmarkVm(c *checker.C) {
closure, vm := setup(logger.InfoLevel, DebugVmTy)
c.ResetTimer()
for i := 0; i < c.N; i++ {
closure.Call(vm, nil)
}
}
func RunCode(mutCode string, typ Type) []byte {
code, err := ethutil.Compile(mutCode, true)
if err != nil {
log.Fatal(err)
}
logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.InfoLevel))
ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
stateObject := state.NewStateObject([]byte{'j', 'e', 'f', 'f'})
closure := NewClosure(nil, stateObject, stateObject, code, big.NewInt(1000000), big.NewInt(0))
vm := New(TestEnv{}, typ)
ret, _, e := closure.Call(vm, nil)
if e != nil {
fmt.Println(e)
}
return ret
}
func (s *VmSuite) TestBuildInSha256(c *checker.C) {
ret := RunCode(`
var in = 42
var out = 0
call(0x2, 0, 10000, in, out)
return out
`, DebugVmTy)
exp := crypto.Sha256(ethutil.LeftPadBytes([]byte{42}, 32))
c.Skip("Depends on mutan")
c.Assert(ret, checker.DeepEquals, exp)
}
func (s *VmSuite) TestBuildInRipemd(c *checker.C) {
ret := RunCode(`
var in = 42
var out = 0
call(0x3, 0, 10000, in, out)
return out
`, DebugVmTy)
exp := ethutil.RightPadBytes(crypto.Ripemd160(ethutil.LeftPadBytes([]byte{42}, 32)), 32)
c.Skip("Depends on mutan")
c.Assert(ret, checker.DeepEquals, exp)
}
func (s *VmSuite) TestOog(c *checker.C) {
// This tests takes a long time and will eventually run out of gas
// t.Skip()
c.Skip("This tests takes a long time and will eventually run out of gas")
logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.InfoLevel))
ethutil.ReadConfig(".ethtest", "/tmp/ethtest", "")
stateObject := state.NewStateObject([]byte{'j', 'e', 'f', 'f'})
closure := NewClosure(nil, stateObject, stateObject, ethutil.Hex2Bytes("60ff60ff600057"), big.NewInt(1000000), big.NewInt(0))
vm := New(TestEnv{}, DebugVmTy)
_, _, e := closure.Call(vm, nil)
if e != nil {
fmt.Println(e)
}
}
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