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core/vm, tests: implemented semi-jit vm 

* changed stack and removed stack ptr. Let go decide on slice reuse.
This commit is contained in:
Jeffrey Wilcke 2015-07-17 23:09:36 +02:00
parent 698e98d981
commit 846f34f78b
19 changed files with 1572 additions and 79 deletions
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6
Makefile
View File

@ -2,7 +2,7 @@
# with Go source code. If you know what GOPATH is then you probably
# don't need to bother with make.
.PHONY: geth mist all test travis-test-with-coverage clean
.PHONY: geth evm mist all test travis-test-with-coverage clean
GOBIN = build/bin
geth:
@ -10,6 +10,10 @@ geth:
@echo "Done building."
@echo "Run \"$(GOBIN)/geth\" to launch geth."
evm:
build/env.sh $(GOROOT)/bin/go install -v $(shell build/ldflags.sh) ./cmd/evm
@echo "Done building."
@echo "Run \"$(GOBIN)/evm to start the evm."
mist:
build/env.sh go install -v $(shell build/ldflags.sh) ./cmd/mist
@echo "Done building."

26
cmd/evm/main.go
View File

@ -32,6 +32,7 @@ import (
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/logger/glog"
)
var (
@ -40,6 +41,14 @@ var (
Name: "debug",
Usage: "output full trace logs",
}
ForceJitFlag = cli.BoolFlag{
Name: "forcejit",
Usage: "forces jit compilation",
}
DisableJitFlag = cli.BoolFlag{
Name: "nojit",
Usage: "disabled jit compilation",
}
CodeFlag = cli.StringFlag{
Name: "code",
Usage: "EVM code",
@ -77,6 +86,8 @@ func init() {
app = utils.NewApp("0.2", "the evm command line interface")
app.Flags = []cli.Flag{
DebugFlag,
ForceJitFlag,
DisableJitFlag,
SysStatFlag,
CodeFlag,
GasFlag,
@ -90,6 +101,10 @@ func init() {
func run(ctx *cli.Context) {
vm.Debug = ctx.GlobalBool(DebugFlag.Name)
vm.ForceJit = ctx.GlobalBool(ForceJitFlag.Name)
vm.DisableJit = ctx.GlobalBool(DisableJitFlag.Name)
glog.SetToStderr(true)
db, _ := ethdb.NewMemDatabase()
statedb := state.New(common.Hash{}, db)
@ -110,11 +125,6 @@ func run(ctx *cli.Context) {
)
vmdone := time.Since(tstart)
if e != nil {
fmt.Println(e)
os.Exit(1)
}
if ctx.GlobalBool(DumpFlag.Name) {
fmt.Println(string(statedb.Dump()))
}
@ -133,7 +143,11 @@ num gc: %d
`, mem.Alloc, mem.TotalAlloc, mem.Mallocs, mem.HeapAlloc, mem.HeapObjects, mem.NumGC)
}
fmt.Printf("OUT: 0x%x\n", ret)
fmt.Printf("OUT: 0x%x", ret)
if e != nil {
fmt.Printf(" error: %v", e)
}
fmt.Println()
}
func main() {

3
cmd/geth/main.go
View File

@ -307,6 +307,9 @@ JavaScript API. See https://github.com/ethereum/go-ethereum/wiki/Javascipt-Conso
utils.ExecFlag,
utils.WhisperEnabledFlag,
utils.VMDebugFlag,
utils.VMForceJitFlag,
utils.VMJitCacheFlag,
utils.VMEnableJitFlag,
utils.NetworkIdFlag,
utils.RPCCORSDomainFlag,
utils.VerbosityFlag,

31
cmd/utils/flags.go
View File

@ -27,6 +27,7 @@ import (
"runtime"
"strconv"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/metrics"
"github.com/codegangsta/cli"
@ -172,6 +173,25 @@ var (
Value: "",
}
// vm flags
VMDebugFlag = cli.BoolFlag{
Name: "vmdebug",
Usage: "Virtual Machine debug output",
}
VMForceJitFlag = cli.BoolFlag{
Name: "forcejit",
Usage: "Force the JIT VM to take precedence",
}
VMJitCacheFlag = cli.IntFlag{
Name: "jitcache",
Usage: "Amount of cached JIT VM programs",
Value: 64,
}
VMEnableJitFlag = cli.BoolFlag{
Name: "jitvm",
Usage: "Enable the JIT VM",
}
// logging and debug settings
LogFileFlag = cli.StringFlag{
Name: "logfile",
@ -196,10 +216,6 @@ var (
Usage: "The syntax of the argument is a comma-separated list of pattern=N, where pattern is a literal file name (minus the \".go\" suffix) or \"glob\" pattern and N is a log verbosity level.",
Value: glog.GetVModule(),
}
VMDebugFlag = cli.BoolFlag{
Name: "vmdebug",
Usage: "Virtual Machine debug output",
}
BacktraceAtFlag = cli.GenericFlag{
Name: "backtrace_at",
Usage: "If set to a file and line number (e.g., \"block.go:271\") holding a logging statement, a stack trace will be logged",
@ -434,6 +450,13 @@ func SetupLogger(ctx *cli.Context) {
glog.SetLogDir(ctx.GlobalString(LogFileFlag.Name))
}
// SetupVM configured the VM package's global settings
func SetupVM(ctx *cli.Context) {
vm.DisableJit = !ctx.GlobalBool(VMEnableJitFlag.Name)
vm.ForceJit = ctx.GlobalBool(VMForceJitFlag.Name)
vm.SetJITCacheSize(ctx.GlobalInt(VMJitCacheFlag.Name))
}
// MakeChain creates a chain manager from set command line flags.
func MakeChain(ctx *cli.Context) (chain *core.ChainManager, blockDB, stateDB, extraDB common.Database) {
datadir := ctx.GlobalString(DataDirFlag.Name)

2
core/block_processor.go
View File

@ -84,8 +84,6 @@ func (sm *BlockProcessor) TransitionState(statedb *state.StateDB, parent, block
}
func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int, transientProcess bool) (*types.Receipt, *big.Int, error) {
// If we are mining this block and validating we want to set the logs back to 0
cb := statedb.GetStateObject(coinbase.Address())
_, gas, err := ApplyMessage(NewEnv(statedb, self.bc, tx, header), tx, cb)
if err != nil {

2
core/chain_manager.go
View File

@ -632,7 +632,7 @@ func (self *ChainManager) InsertChain(chain types.Blocks) (int, error) {
switch status {
case CanonStatTy:
if glog.V(logger.Debug) {
glog.Infof("[%v] inserted block #%d (%d TXs %d UNCs) (%x...). Took %v\n", time.Now().UnixNano(), block.Number(), len(block.Transactions()), len(block.Uncles()), block.Hash().Bytes()[0:4], time.Since(bstart))
glog.Infof("[%v] inserted block #%d (%d TXs %v G %d UNCs) (%x...). Took %v\n", time.Now().UnixNano(), block.Number(), len(block.Transactions()), block.GasUsed(), len(block.Uncles()), block.Hash().Bytes()[0:4], time.Since(bstart))
}
queue[i] = ChainEvent{block, block.Hash(), logs}
queueEvent.canonicalCount++

1
core/vm/context.go
View File

@ -35,6 +35,7 @@ type Context struct {
jumpdests destinations // result of JUMPDEST analysis.
Code []byte
Input []byte
CodeAddr *common.Address
value, Gas, UsedGas, Price *big.Int

2
core/vm/contracts.go
View File

@ -94,7 +94,7 @@ func ecrecoverFunc(in []byte) []byte {
v := byte(vbig.Uint64())
if !crypto.ValidateSignatureValues(v, r, s) {
glog.V(logger.Error).Infof("EC RECOVER FAIL: v, r or s value invalid")
glog.V(logger.Debug).Infof("EC RECOVER FAIL: v, r or s value invalid")
return nil
}

4
core/vm/gas.go
View File

@ -54,8 +54,8 @@ func baseCheck(op OpCode, stack *stack, gas *big.Int) error {
return err
}
if r.stackPush > 0 && len(stack.data)-r.stackPop+r.stackPush > int(params.StackLimit.Int64())+1 {
return fmt.Errorf("stack limit reached %d (%d)", len(stack.data), params.StackLimit.Int64())
if r.stackPush > 0 && stack.len()-r.stackPop+r.stackPush > int(params.StackLimit.Int64()) {
return fmt.Errorf("stack limit reached %d (%d)", stack.len(), params.StackLimit.Int64())
}
gas.Add(gas, r.gas)

587
core/vm/instructions.go Normal file
View File

@ -0,0 +1,587 @@
// Copyright 2014 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 vm
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
)
type instrFn func(instr instruction, env Environment, context *Context, memory *Memory, stack *stack)
type instrExFn func(instr instruction, ret *big.Int, env Environment, context *Context, memory *Memory, stack *stack)
type instruction struct {
op OpCode
pc uint64
fn instrFn
specFn instrExFn
data *big.Int
gas *big.Int
spop int
spush int
}
func opStaticJump(instr instruction, ret *big.Int, env Environment, context *Context, memory *Memory, stack *stack) {
ret.Set(instr.data)
}
func opAdd(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
stack.push(U256(new(big.Int).Add(x, y)))
}
func opSub(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
stack.push(U256(new(big.Int).Sub(x, y)))
}
func opMul(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
stack.push(U256(new(big.Int).Mul(x, y)))
}
func opDiv(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x, y := stack.pop(), stack.pop()
if y.Cmp(common.Big0) != 0 {
base.Div(x, y)
}
// pop result back on the stack
stack.push(U256(base))
}
func opSdiv(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x, y := S256(stack.pop()), S256(stack.pop())
if y.Cmp(common.Big0) == 0 {
base.Set(common.Big0)
} else {
n := new(big.Int)
if new(big.Int).Mul(x, y).Cmp(common.Big0) < 0 {
n.SetInt64(-1)
} else {
n.SetInt64(1)
}
base.Div(x.Abs(x), y.Abs(y)).Mul(base, n)
U256(base)
}
stack.push(base)
}
func opMod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x, y := stack.pop(), stack.pop()
if y.Cmp(common.Big0) == 0 {
base.Set(common.Big0)
} else {
base.Mod(x, y)
}
U256(base)
stack.push(base)
}
func opSmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x, y := S256(stack.pop()), S256(stack.pop())
if y.Cmp(common.Big0) == 0 {
base.Set(common.Big0)
} else {
n := new(big.Int)
if x.Cmp(common.Big0) < 0 {
n.SetInt64(-1)
} else {
n.SetInt64(1)
}
base.Mod(x.Abs(x), y.Abs(y)).Mul(base, n)
U256(base)
}
stack.push(base)
}
func opExp(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x, y := stack.pop(), stack.pop()
base.Exp(x, y, Pow256)
U256(base)
stack.push(base)
}
func opSignExtend(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
back := stack.pop()
if back.Cmp(big.NewInt(31)) < 0 {
bit := uint(back.Uint64()*8 + 7)
num := stack.pop()
mask := new(big.Int).Lsh(common.Big1, bit)
mask.Sub(mask, common.Big1)
if common.BitTest(num, int(bit)) {
num.Or(num, mask.Not(mask))
} else {
num.And(num, mask)
}
num = U256(num)
stack.push(num)
}
}
func opNot(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(U256(new(big.Int).Not(stack.pop())))
}
func opLt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
// x < y
if x.Cmp(y) < 0 {
stack.push(common.BigTrue)
} else {
stack.push(common.BigFalse)
}
}
func opGt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
// x > y
if x.Cmp(y) > 0 {
stack.push(common.BigTrue)
} else {
stack.push(common.BigFalse)
}
}
func opSlt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := S256(stack.pop()), S256(stack.pop())
// x < y
if x.Cmp(S256(y)) < 0 {
stack.push(common.BigTrue)
} else {
stack.push(common.BigFalse)
}
}
func opSgt(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := S256(stack.pop()), S256(stack.pop())
// x > y
if x.Cmp(y) > 0 {
stack.push(common.BigTrue)
} else {
stack.push(common.BigFalse)
}
}
func opEq(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
// x == y
if x.Cmp(y) == 0 {
stack.push(common.BigTrue)
} else {
stack.push(common.BigFalse)
}
}
func opIszero(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x := stack.pop()
if x.Cmp(common.BigFalse) > 0 {
stack.push(common.BigFalse)
} else {
stack.push(common.BigTrue)
}
}
func opAnd(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
stack.push(new(big.Int).And(x, y))
}
func opOr(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
stack.push(new(big.Int).Or(x, y))
}
func opXor(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
x, y := stack.pop(), stack.pop()
stack.push(new(big.Int).Xor(x, y))
}
func opByte(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
th, val := stack.pop(), stack.pop()
if th.Cmp(big.NewInt(32)) < 0 {
byt := big.NewInt(int64(common.LeftPadBytes(val.Bytes(), 32)[th.Int64()]))
base.Set(byt)
} else {
base.Set(common.BigFalse)
}
stack.push(base)
}
func opAddmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x := stack.pop()
y := stack.pop()
z := stack.pop()
if z.Cmp(Zero) > 0 {
add := new(big.Int).Add(x, y)
base.Mod(add, z)
base = U256(base)
}
stack.push(base)
}
func opMulmod(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
base := new(big.Int)
x := stack.pop()
y := stack.pop()
z := stack.pop()
if z.Cmp(Zero) > 0 {
mul := new(big.Int).Mul(x, y)
base.Mod(mul, z)
U256(base)
}
stack.push(base)
}
func opSha3(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
offset, size := stack.pop(), stack.pop()
hash := crypto.Sha3(memory.Get(offset.Int64(), size.Int64()))
stack.push(common.BigD(hash))
}
func opAddress(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(common.Bytes2Big(context.Address().Bytes()))
}
func opBalance(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
addr := common.BigToAddress(stack.pop())
balance := env.State().GetBalance(addr)
stack.push(new(big.Int).Set(balance))
}
func opOrigin(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(env.Origin().Big())
}
func opCaller(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(common.Bytes2Big(context.caller.Address().Bytes()))
}
func opCallValue(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).Set(context.value))
}
func opCalldataLoad(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(common.Bytes2Big(getData(context.Input, stack.pop(), common.Big32)))
}
func opCalldataSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(big.NewInt(int64(len(context.Input))))
}
func opCalldataCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
var (
mOff = stack.pop()
cOff = stack.pop()
l = stack.pop()
)
memory.Set(mOff.Uint64(), l.Uint64(), getData(context.Input, cOff, l))
}
func opExtCodeSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
addr := common.BigToAddress(stack.pop())
l := big.NewInt(int64(len(env.State().GetCode(addr))))
stack.push(l)
}
func opCodeSize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
l := big.NewInt(int64(len(context.Code)))
stack.push(l)
}
func opCodeCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
var (
mOff = stack.pop()
cOff = stack.pop()
l = stack.pop()
)
codeCopy := getData(context.Code, cOff, l)
memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
}
func opExtCodeCopy(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
var (
addr = common.BigToAddress(stack.pop())
mOff = stack.pop()
cOff = stack.pop()
l = stack.pop()
)
codeCopy := getData(env.State().GetCode(addr), cOff, l)
memory.Set(mOff.Uint64(), l.Uint64(), codeCopy)
}
func opGasprice(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).Set(context.Price))
}
func opBlockhash(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
num := stack.pop()
n := new(big.Int).Sub(env.BlockNumber(), common.Big257)
if num.Cmp(n) > 0 && num.Cmp(env.BlockNumber()) < 0 {
stack.push(env.GetHash(num.Uint64()).Big())
} else {
stack.push(common.Big0)
}
}
func opCoinbase(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(env.Coinbase().Big())
}
func opTimestamp(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).SetUint64(env.Time()))
}
func opNumber(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(U256(env.BlockNumber()))
}
func opDifficulty(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).Set(env.Difficulty()))
}
func opGasLimit(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).Set(env.GasLimit()))
}
func opPop(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.pop()
}
func opPush(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).Set(instr.data))
}
func opDup(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.dup(int(instr.data.Int64()))
}
func opSwap(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.swap(int(instr.data.Int64()))
}
func opLog(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
n := int(instr.data.Int64())
topics := make([]common.Hash, n)
mStart, mSize := stack.pop(), stack.pop()
for i := 0; i < n; i++ {
topics[i] = common.BigToHash(stack.pop())
}
d := memory.Get(mStart.Int64(), mSize.Int64())
log := state.NewLog(context.Address(), topics, d, env.BlockNumber().Uint64())
env.AddLog(log)
}
func opMload(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
offset := stack.pop()
val := common.BigD(memory.Get(offset.Int64(), 32))
stack.push(val)
}
func opMstore(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
// pop value of the stack
mStart, val := stack.pop(), stack.pop()
memory.Set(mStart.Uint64(), 32, common.BigToBytes(val, 256))
}
func opMstore8(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
off, val := stack.pop().Int64(), stack.pop().Int64()
memory.store[off] = byte(val & 0xff)
}
func opSload(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
loc := common.BigToHash(stack.pop())
val := env.State().GetState(context.Address(), loc).Big()
stack.push(val)
}
func opSstore(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
loc := common.BigToHash(stack.pop())
val := stack.pop()
env.State().SetState(context.Address(), loc, common.BigToHash(val))
}
func opJump(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
}
func opJumpi(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
}
func opJumpdest(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
}
func opPc(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(instr.data)
}
func opMsize(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(big.NewInt(int64(memory.Len())))
}
func opGas(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
stack.push(new(big.Int).Set(context.Gas))
}
func opCreate(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
var (
value = stack.pop()
offset, size = stack.pop(), stack.pop()
input = memory.Get(offset.Int64(), size.Int64())
gas = new(big.Int).Set(context.Gas)
addr common.Address
)
context.UseGas(context.Gas)
ret, suberr, ref := env.Create(context, input, gas, context.Price, value)
if suberr != nil {
stack.push(common.BigFalse)
} else {
// gas < len(ret) * Createinstr.dataGas == NO_CODE
dataGas := big.NewInt(int64(len(ret)))
dataGas.Mul(dataGas, params.CreateDataGas)
if context.UseGas(dataGas) {
ref.SetCode(ret)
}
addr = ref.Address()
stack.push(addr.Big())
}
}
func opCall(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
gas := stack.pop()
// pop gas and value of the stack.
addr, value := stack.pop(), stack.pop()
value = U256(value)
// pop input size and offset
inOffset, inSize := stack.pop(), stack.pop()
// pop return size and offset
retOffset, retSize := stack.pop(), stack.pop()
address := common.BigToAddress(addr)
// Get the arguments from the memory
args := memory.Get(inOffset.Int64(), inSize.Int64())
if len(value.Bytes()) > 0 {
gas.Add(gas, params.CallStipend)
}
ret, err := env.Call(context, address, args, gas, context.Price, value)
if err != nil {
stack.push(common.BigFalse)
} else {
stack.push(common.BigTrue)
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
}
}
func opCallCode(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
gas := stack.pop()
// pop gas and value of the stack.
addr, value := stack.pop(), stack.pop()
value = U256(value)
// pop input size and offset
inOffset, inSize := stack.pop(), stack.pop()
// pop return size and offset
retOffset, retSize := stack.pop(), stack.pop()
address := common.BigToAddress(addr)
// Get the arguments from the memory
args := memory.Get(inOffset.Int64(), inSize.Int64())
if len(value.Bytes()) > 0 {
gas.Add(gas, params.CallStipend)
}
ret, err := env.CallCode(context, address, args, gas, context.Price, value)
if err != nil {
stack.push(common.BigFalse)
} else {
stack.push(common.BigTrue)
memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
}
}
func opReturn(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {}
func opStop(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {}
func opSuicide(instr instruction, env Environment, context *Context, memory *Memory, stack *stack) {
receiver := env.State().GetOrNewStateObject(common.BigToAddress(stack.pop()))
balance := env.State().GetBalance(context.Address())
receiver.AddBalance(balance)
env.State().Delete(context.Address())
}

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// Copyright 2014 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 vm
import (
"fmt"
"math/big"
"sync/atomic"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/params"
"github.com/hashicorp/golang-lru"
)
type progStatus int32
const (
progUnknown progStatus = iota
progCompile
progReady
progError
)
var programs *lru.Cache
func init() {
programs, _ = lru.New(defaultJitMaxCache)
}
// SetJITCacheSize recreates the program cache with the max given size. Setting
// a new cache is **not** thread safe. Use with caution.
func SetJITCacheSize(size int) {
programs, _ = lru.New(size)
}
// GetProgram returns the program by id or nil when non-existant
func GetProgram(id common.Hash) *Program {
if p, ok := programs.Get(id); ok {
return p.(*Program)
}
return nil
}
// GenProgramStatus returns the status of the given program id
func GetProgramStatus(id common.Hash) progStatus {
program := GetProgram(id)
if program != nil {
return progStatus(atomic.LoadInt32(&program.status))
}
return progUnknown
}
// Program is a compiled program for the JIT VM and holds all required for
// running a compiled JIT program.
type Program struct {
Id common.Hash // Id of the program
status int32 // status should be accessed atomically
context *Context
instructions []instruction // instruction set
mapping map[uint64]int // real PC mapping to array indices
destinations map[uint64]struct{} // cached jump destinations
code []byte
}
func NewProgram(code []byte) *Program {
program := &Program{
Id: crypto.Sha3Hash(code),
mapping: make(map[uint64]int),
destinations: make(map[uint64]struct{}),
code: code,
}
programs.Add(program.Id, program)
return program
}
func (p *Program) addInstr(op OpCode, pc uint64, fn instrFn, data *big.Int) {
// PUSH and DUP are a bit special. They all cost the same but we do want to have checking on stack push limit
// PUSH is also allowed to calculate the same price for all PUSHes
// DUP requirements are handled elsewhere (except for the stack limit check)
baseOp := op
if op >= PUSH1 && op <= PUSH32 {
baseOp = PUSH1
}
if op >= DUP1 && op <= DUP16 {
baseOp = DUP1
}
base := _baseCheck[baseOp]
instr := instruction{op, pc, fn, nil, data, base.gas, base.stackPop, base.stackPush}
p.instructions = append(p.instructions, instr)
p.mapping[pc] = len(p.instructions) - 1
}
func CompileProgram(program *Program) (err error) {
if progStatus(atomic.LoadInt32(&program.status)) == progCompile {
return nil
}
atomic.StoreInt32(&program.status, int32(progCompile))
defer func() {
if err != nil {
atomic.StoreInt32(&program.status, int32(progError))
} else {
atomic.StoreInt32(&program.status, int32(progReady))
}
}()
// loop thru the opcodes and "compile" in to instructions
for pc := uint64(0); pc < uint64(len(program.code)); pc++ {
switch op := OpCode(program.code[pc]); op {
case ADD:
program.addInstr(op, pc, opAdd, nil)
case SUB:
program.addInstr(op, pc, opSub, nil)
case MUL:
program.addInstr(op, pc, opMul, nil)
case DIV:
program.addInstr(op, pc, opDiv, nil)
case SDIV:
program.addInstr(op, pc, opSdiv, nil)
case MOD:
program.addInstr(op, pc, opMod, nil)
case SMOD:
program.addInstr(op, pc, opSmod, nil)
case EXP:
program.addInstr(op, pc, opExp, nil)
case SIGNEXTEND:
program.addInstr(op, pc, opSignExtend, nil)
case NOT:
program.addInstr(op, pc, opNot, nil)
case LT:
program.addInstr(op, pc, opLt, nil)
case GT:
program.addInstr(op, pc, opGt, nil)
case SLT:
program.addInstr(op, pc, opSlt, nil)
case SGT:
program.addInstr(op, pc, opSgt, nil)
case EQ:
program.addInstr(op, pc, opEq, nil)
case ISZERO:
program.addInstr(op, pc, opIszero, nil)
case AND:
program.addInstr(op, pc, opAnd, nil)
case OR:
program.addInstr(op, pc, opOr, nil)
case XOR:
program.addInstr(op, pc, opXor, nil)
case BYTE:
program.addInstr(op, pc, opByte, nil)
case ADDMOD:
program.addInstr(op, pc, opAddmod, nil)
case MULMOD:
program.addInstr(op, pc, opMulmod, nil)
case SHA3:
program.addInstr(op, pc, opSha3, nil)
case ADDRESS:
program.addInstr(op, pc, opAddress, nil)
case BALANCE:
program.addInstr(op, pc, opBalance, nil)
case ORIGIN:
program.addInstr(op, pc, opOrigin, nil)
case CALLER:
program.addInstr(op, pc, opCaller, nil)
case CALLVALUE:
program.addInstr(op, pc, opCallValue, nil)
case CALLDATALOAD:
program.addInstr(op, pc, opCalldataLoad, nil)
case CALLDATASIZE:
program.addInstr(op, pc, opCalldataSize, nil)
case CALLDATACOPY:
program.addInstr(op, pc, opCalldataCopy, nil)
case CODESIZE:
program.addInstr(op, pc, opCodeSize, nil)
case EXTCODESIZE:
program.addInstr(op, pc, opExtCodeSize, nil)
case CODECOPY:
program.addInstr(op, pc, opCodeCopy, nil)
case EXTCODECOPY:
program.addInstr(op, pc, opExtCodeCopy, nil)
case GASPRICE:
program.addInstr(op, pc, opGasprice, nil)
case BLOCKHASH:
program.addInstr(op, pc, opBlockhash, nil)
case COINBASE:
program.addInstr(op, pc, opCoinbase, nil)
case TIMESTAMP:
program.addInstr(op, pc, opTimestamp, nil)
case NUMBER:
program.addInstr(op, pc, opNumber, nil)
case DIFFICULTY:
program.addInstr(op, pc, opDifficulty, nil)
case GASLIMIT:
program.addInstr(op, pc, opGasLimit, nil)
case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
size := uint64(op - PUSH1 + 1)
bytes := getData([]byte(program.code), new(big.Int).SetUint64(pc+1), new(big.Int).SetUint64(size))
program.addInstr(op, pc, opPush, common.Bytes2Big(bytes))
pc += size
case POP:
program.addInstr(op, pc, opPop, nil)
case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
program.addInstr(op, pc, opDup, big.NewInt(int64(op-DUP1+1)))
case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
program.addInstr(op, pc, opSwap, big.NewInt(int64(op-SWAP1+2)))
case LOG0, LOG1, LOG2, LOG3, LOG4:
program.addInstr(op, pc, opLog, big.NewInt(int64(op-LOG0)))
case MLOAD:
program.addInstr(op, pc, opMload, nil)
case MSTORE:
program.addInstr(op, pc, opMstore, nil)
case MSTORE8:
program.addInstr(op, pc, opMstore8, nil)
case SLOAD:
program.addInstr(op, pc, opSload, nil)
case SSTORE:
program.addInstr(op, pc, opSstore, nil)
case JUMP:
program.addInstr(op, pc, opJump, nil)
case JUMPI:
program.addInstr(op, pc, opJumpi, nil)
case JUMPDEST:
program.addInstr(op, pc, opJumpdest, nil)
program.destinations[pc] = struct{}{}
case PC:
program.addInstr(op, pc, opPc, big.NewInt(int64(pc)))
case MSIZE:
program.addInstr(op, pc, opMsize, nil)
case GAS:
program.addInstr(op, pc, opGas, nil)
case CREATE:
program.addInstr(op, pc, opCreate, nil)
case CALL:
program.addInstr(op, pc, opCall, nil)
case CALLCODE:
program.addInstr(op, pc, opCallCode, nil)
case RETURN:
program.addInstr(op, pc, opReturn, nil)
case SUICIDE:
program.addInstr(op, pc, opSuicide, nil)
case STOP: // Stop the context
program.addInstr(op, pc, opStop, nil)
default:
program.addInstr(op, pc, nil, nil)
}
}
return nil
}
func RunProgram(program *Program, env Environment, context *Context, input []byte) ([]byte, error) {
return runProgram(program, 0, NewMemory(), newstack(), env, context, input)
}
func runProgram(program *Program, pcstart uint64, mem *Memory, stack *stack, env Environment, context *Context, input []byte) ([]byte, error) {
context.Input = input
var (
caller = context.caller
statedb = env.State()
pc int = program.mapping[pcstart]
jump = func(to *big.Int) error {
if !validDest(program.destinations, to) {
nop := context.GetOp(to.Uint64())
return fmt.Errorf("invalid jump destination (%v) %v", nop, to)
}
pc = program.mapping[to.Uint64()]
return nil
}
)
for pc < len(program.instructions) {
instr := program.instructions[pc]
// calculate the new memory size and gas price for the current executing opcode
newMemSize, cost, err := jitCalculateGasAndSize(env, context, caller, instr, statedb, mem, stack)
if err != nil {
return nil, err
}
// Use the calculated gas. When insufficient gas is present, use all gas and return an
// Out Of Gas error
if !context.UseGas(cost) {
return nil, OutOfGasError
}
// Resize the memory calculated previously
mem.Resize(newMemSize.Uint64())
// These opcodes return an argument and are thefor handled
// differently from the rest of the opcodes
switch instr.op {
case JUMP:
if err := jump(stack.pop()); err != nil {
return nil, err
}
continue
case JUMPI:
pos, cond := stack.pop(), stack.pop()
if cond.Cmp(common.BigTrue) >= 0 {
if err := jump(pos); err != nil {
return nil, err
}
continue
}
case RETURN:
offset, size := stack.pop(), stack.pop()
ret := mem.GetPtr(offset.Int64(), size.Int64())
return context.Return(ret), nil
case SUICIDE:
instr.fn(instr, env, context, mem, stack)
return context.Return(nil), nil
case STOP:
return context.Return(nil), nil
default:
if instr.fn == nil {
return nil, fmt.Errorf("Invalid opcode %x", instr.op)
}
instr.fn(instr, env, context, mem, stack)
}
pc++
}
return context.Return(nil), nil
}
// validDest checks if the given distination is a valid one given the
// destination table of the program
func validDest(dests map[uint64]struct{}, dest *big.Int) bool {
// PC cannot go beyond len(code) and certainly can't be bigger than 64bits.
// Don't bother checking for JUMPDEST in that case.
if dest.Cmp(bigMaxUint64) > 0 {
return false
}
_, ok := dests[dest.Uint64()]
return ok
}
// jitCalculateGasAndSize calculates the required given the opcode and stack items calculates the new memorysize for
// the operation. This does not reduce gas or resizes the memory.
func jitCalculateGasAndSize(env Environment, context *Context, caller ContextRef, instr instruction, statedb *state.StateDB, mem *Memory, stack *stack) (*big.Int, *big.Int, error) {
var (
gas = new(big.Int)
newMemSize *big.Int = new(big.Int)
)
err := jitBaseCheck(instr, stack, gas)
if err != nil {
return nil, nil, err
}
// stack Check, memory resize & gas phase
switch op := instr.op; op {
case SWAP1, SWAP2, SWAP3, SWAP4, SWAP5, SWAP6, SWAP7, SWAP8, SWAP9, SWAP10, SWAP11, SWAP12, SWAP13, SWAP14, SWAP15, SWAP16:
n := int(op - SWAP1 + 2)
err := stack.require(n)
if err != nil {
return nil, nil, err
}
gas.Set(GasFastestStep)
case DUP1, DUP2, DUP3, DUP4, DUP5, DUP6, DUP7, DUP8, DUP9, DUP10, DUP11, DUP12, DUP13, DUP14, DUP15, DUP16:
n := int(op - DUP1 + 1)
err := stack.require(n)
if err != nil {
return nil, nil, err
}
gas.Set(GasFastestStep)
case LOG0, LOG1, LOG2, LOG3, LOG4:
n := int(op - LOG0)
err := stack.require(n + 2)
if err != nil {
return nil, nil, err
}
mSize, mStart := stack.data[stack.len()-2], stack.data[stack.len()-1]
gas.Add(gas, params.LogGas)
gas.Add(gas, new(big.Int).Mul(big.NewInt(int64(n)), params.LogTopicGas))
gas.Add(gas, new(big.Int).Mul(mSize, params.LogDataGas))
newMemSize = calcMemSize(mStart, mSize)
case EXP:
gas.Add(gas, new(big.Int).Mul(big.NewInt(int64(len(stack.data[stack.len()-2].Bytes()))), params.ExpByteGas))
case SSTORE:
err := stack.require(2)
if err != nil {
return nil, nil, err
}
var g *big.Int
y, x := stack.data[stack.len()-2], stack.data[stack.len()-1]
val := statedb.GetState(context.Address(), common.BigToHash(x))
// This checks for 3 scenario's and calculates gas accordingly
// 1. From a zero-value address to a non-zero value (NEW VALUE)
// 2. From a non-zero value address to a zero-value address (DELETE)
// 3. From a nen-zero to a non-zero (CHANGE)
if common.EmptyHash(val) && !common.EmptyHash(common.BigToHash(y)) {
// 0 => non 0
g = params.SstoreSetGas
} else if !common.EmptyHash(val) && common.EmptyHash(common.BigToHash(y)) {
statedb.Refund(params.SstoreRefundGas)
g = params.SstoreClearGas
} else {
// non 0 => non 0 (or 0 => 0)
g = params.SstoreClearGas
}
gas.Set(g)
case SUICIDE:
if !statedb.IsDeleted(context.Address()) {
statedb.Refund(params.SuicideRefundGas)
}
case MLOAD:
newMemSize = calcMemSize(stack.peek(), u256(32))
case MSTORE8:
newMemSize = calcMemSize(stack.peek(), u256(1))
case MSTORE:
newMemSize = calcMemSize(stack.peek(), u256(32))
case RETURN:
newMemSize = calcMemSize(stack.peek(), stack.data[stack.len()-2])
case SHA3:
newMemSize = calcMemSize(stack.peek(), stack.data[stack.len()-2])
words := toWordSize(stack.data[stack.len()-2])
gas.Add(gas, words.Mul(words, params.Sha3WordGas))
case CALLDATACOPY:
newMemSize = calcMemSize(stack.peek(), stack.data[stack.len()-3])
words := toWordSize(stack.data[stack.len()-3])
gas.Add(gas, words.Mul(words, params.CopyGas))
case CODECOPY:
newMemSize = calcMemSize(stack.peek(), stack.data[stack.len()-3])
words := toWordSize(stack.data[stack.len()-3])
gas.Add(gas, words.Mul(words, params.CopyGas))
case EXTCODECOPY:
newMemSize = calcMemSize(stack.data[stack.len()-2], stack.data[stack.len()-4])
words := toWordSize(stack.data[stack.len()-4])
gas.Add(gas, words.Mul(words, params.CopyGas))
case CREATE:
newMemSize = calcMemSize(stack.data[stack.len()-2], stack.data[stack.len()-3])
case CALL, CALLCODE:
gas.Add(gas, stack.data[stack.len()-1])
if op == CALL {
if env.State().GetStateObject(common.BigToAddress(stack.data[stack.len()-2])) == nil {
gas.Add(gas, params.CallNewAccountGas)
}
}
if len(stack.data[stack.len()-3].Bytes()) > 0 {
gas.Add(gas, params.CallValueTransferGas)
}
x := calcMemSize(stack.data[stack.len()-6], stack.data[stack.len()-7])
y := calcMemSize(stack.data[stack.len()-4], stack.data[stack.len()-5])
newMemSize = common.BigMax(x, y)
}
if newMemSize.Cmp(common.Big0) > 0 {
newMemSizeWords := toWordSize(newMemSize)
newMemSize.Mul(newMemSizeWords, u256(32))
if newMemSize.Cmp(u256(int64(mem.Len()))) > 0 {
oldSize := toWordSize(big.NewInt(int64(mem.Len())))
pow := new(big.Int).Exp(oldSize, common.Big2, Zero)
linCoef := new(big.Int).Mul(oldSize, params.MemoryGas)
quadCoef := new(big.Int).Div(pow, params.QuadCoeffDiv)
oldTotalFee := new(big.Int).Add(linCoef, quadCoef)
pow.Exp(newMemSizeWords, common.Big2, Zero)
linCoef = new(big.Int).Mul(newMemSizeWords, params.MemoryGas)
quadCoef = new(big.Int).Div(pow, params.QuadCoeffDiv)
newTotalFee := new(big.Int).Add(linCoef, quadCoef)
fee := new(big.Int).Sub(newTotalFee, oldTotalFee)
gas.Add(gas, fee)
}
}
return newMemSize, gas, nil
}
// jitBaseCheck is the same as baseCheck except it doesn't do the look up in the
// gas table. This is done during compilation instead.
func jitBaseCheck(instr instruction, stack *stack, gas *big.Int) error {
err := stack.require(instr.spop)
if err != nil {
return err
}
if instr.spush > 0 && stack.len()-instr.spop+instr.spush > int(params.StackLimit.Int64()) {
return fmt.Errorf("stack limit reached %d (%d)", stack.len(), params.StackLimit.Int64())
}
// nil on gas means no base calculation
if instr.gas == nil {
return nil
}
gas.Add(gas, instr.gas)
return nil
}

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// Copyright 2014 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 vm
import (
"math/big"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
)
const maxRun = 1000
type vmBench struct {
precompile bool // compile prior to executing
nojit bool // ignore jit (sets DisbaleJit = true
forcejit bool // forces the jit, precompile is ignored
code []byte
input []byte
}
func runVmBench(test vmBench, b *testing.B) {
db, _ := ethdb.NewMemDatabase()
sender := state.NewStateObject(common.Address{}, db)
if test.precompile && !test.forcejit {
NewProgram(test.code)
}
env := NewEnv()
DisableJit = test.nojit
ForceJit = test.forcejit
b.ResetTimer()
for i := 0; i < b.N; i++ {
context := NewContext(sender, sender, big.NewInt(100), big.NewInt(10000), big.NewInt(0))
context.Code = test.code
context.CodeAddr = &common.Address{}
_, err := New(env).Run(context, test.input)
if err != nil {
b.Error(err)
b.FailNow()
}
}
}
var benchmarks = map[string]vmBench{
"pushes": vmBench{
false, false, false,
common.Hex2Bytes("600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01600a600a01"), nil,
},
}
func BenchmarkPushes(b *testing.B) {
runVmBench(benchmarks["pushes"], b)
}
type Env struct {
gasLimit *big.Int
depth int
}
func NewEnv() *Env {
return &Env{big.NewInt(10000), 0}
}
func (self *Env) Origin() common.Address { return common.Address{} }
func (self *Env) BlockNumber() *big.Int { return big.NewInt(0) }
func (self *Env) AddStructLog(log StructLog) {
}
func (self *Env) StructLogs() []StructLog {
return nil
}
//func (self *Env) PrevHash() []byte { return self.parent }
func (self *Env) Coinbase() common.Address { return common.Address{} }
func (self *Env) Time() uint64 { return uint64(time.Now().Unix()) }
func (self *Env) Difficulty() *big.Int { return big.NewInt(0) }
func (self *Env) State() *state.StateDB { return nil }
func (self *Env) GasLimit() *big.Int { return self.gasLimit }
func (self *Env) VmType() Type { return StdVmTy }
func (self *Env) GetHash(n uint64) common.Hash {
return common.BytesToHash(crypto.Sha3([]byte(big.NewInt(int64(n)).String())))
}
func (self *Env) AddLog(log *state.Log) {
}
func (self *Env) Depth() int { return self.depth }
func (self *Env) SetDepth(i int) { self.depth = i }
func (self *Env) Transfer(from, to Account, amount *big.Int) error {
return nil
}
func (self *Env) Call(caller ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
return nil, nil
}
func (self *Env) CallCode(caller ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
return nil, nil
}
func (self *Env) Create(caller ContextRef, data []byte, gas, price, value *big.Int) ([]byte, error, ContextRef) {
return nil, nil, nil
}

24
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// Copyright 2014 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 vm
var (
DisableJit bool // Disable the JIT VM
ForceJit bool // Force the JIT, skip byte VM
MaxProgSize int // Max cache size for JIT Programs
)
const defaultJitMaxCache int = 64

21
core/vm/stack.go
View File

@ -27,32 +27,27 @@ func newstack() *stack {
type stack struct {
data []*big.Int
ptr int
}
func (st *stack) Data() []*big.Int {
return st.data[:st.ptr]
return st.data
}
func (st *stack) push(d *big.Int) {
// NOTE push limit (1024) is checked in baseCheck
stackItem := new(big.Int).Set(d)
if len(st.data) > st.ptr {
st.data[st.ptr] = stackItem
} else {
st.data = append(st.data, stackItem)
}
st.ptr++
//stackItem := new(big.Int).Set(d)
//st.data = append(st.data, stackItem)
st.data = append(st.data, d)
}
func (st *stack) pop() (ret *big.Int) {
st.ptr--
ret = st.data[st.ptr]
ret = st.data[len(st.data)-1]
st.data = st.data[:len(st.data)-1]
return
}
func (st *stack) len() int {
return st.ptr
return len(st.data)
}
func (st *stack) swap(n int) {
@ -60,7 +55,7 @@ func (st *stack) swap(n int) {
}
func (st *stack) dup(n int) {
st.push(st.data[st.len()-n])
st.push(new(big.Int).Set(st.data[st.len()-n]))
}
func (st *stack) peek() *big.Int {

125
core/vm/vm.go
View File

@ -24,30 +24,19 @@ import (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/params"
)
// Vm implements VirtualMachine
type Vm struct {
env Environment
err error
// For logging
debug bool
BreakPoints []int64
Stepping bool
Fn string
Recoverable bool
// Will be called before the vm returns
After func(*Context, error)
}
// New returns a new Virtual Machine
func New(env Environment) *Vm {
return &Vm{env: env, debug: Debug, Recoverable: true}
return &Vm{env: env}
}
// Run loops and evaluates the contract's code with the given input data
@ -55,17 +44,67 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
self.env.SetDepth(self.env.Depth() + 1)
defer self.env.SetDepth(self.env.Depth() - 1)
// User defer pattern to check for an error and, based on the error being nil or not, use all gas and return.
defer func() {
if err != nil {
// In case of a VM exception (known exceptions) all gas consumed (panics NOT included).
context.UseGas(context.Gas)
ret = context.Return(nil)
}
}()
if context.CodeAddr != nil {
if p := Precompiled[context.CodeAddr.Str()]; p != nil {
return self.RunPrecompiled(p, input, context)
}
}
var (
codehash = crypto.Sha3Hash(context.Code) // codehash is used when doing jump dest caching
program *Program
)
if !DisableJit {
// Fetch program status.
// * If ready run using JIT
// * If unknown, compile in a seperate goroutine
// * If forced wait for compilation and run once done
if status := GetProgramStatus(codehash); status == progReady {
return RunProgram(GetProgram(codehash), self.env, context, input)
} else if status == progUnknown {
if ForceJit {
// Create and compile program
program = NewProgram(context.Code)
perr := CompileProgram(program)
if perr == nil {
return RunProgram(program, self.env, context, input)
}
glog.V(logger.Info).Infoln("error compiling program", err)
} else {
// create and compile the program. Compilation
// is done in a seperate goroutine
program = NewProgram(context.Code)
go func() {
err := CompileProgram(program)
if err != nil {
glog.V(logger.Info).Infoln("error compiling program", err)
return
}
}()
}
}
}
var (
caller = context.caller
code = context.Code
value = context.value
price = context.Price
op OpCode // current opcode
codehash = crypto.Sha3Hash(code) // codehash is used when doing jump dest caching
mem = NewMemory() // bound memory
stack = newstack() // local stack
statedb = self.env.State() // current state
op OpCode // current opcode
mem = NewMemory() // bound memory
stack = newstack() // local stack
statedb = self.env.State() // current state
// For optimisation reason we're using uint64 as the program counter.
// It's theoretically possible to go above 2^64. The YP defines the PC to be uint256. Pratically much less so feasible.
pc = uint64(0) // program counter
@ -89,32 +128,25 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
// User defer pattern to check for an error and, based on the error being nil or not, use all gas and return.
defer func() {
if self.After != nil {
self.After(context, err)
}
if err != nil {
self.log(pc, op, context.Gas, cost, mem, stack, context, err)
// In case of a VM exception (known exceptions) all gas consumed (panics NOT included).
context.UseGas(context.Gas)
ret = context.Return(nil)
}
}()
if context.CodeAddr != nil {
if p := Precompiled[context.CodeAddr.Str()]; p != nil {
return self.RunPrecompiled(p, input, context)
}
}
// Don't bother with the execution if there's no code.
if len(code) == 0 {
return context.Return(nil), nil
}
for {
// Overhead of the atomic read might not be worth it
/* TODO this still causes a few issues in the tests
if program != nil && progStatus(atomic.LoadInt32(&program.status)) == progReady {
// move execution
glog.V(logger.Info).Infoln("Moved execution to JIT")
return runProgram(program, pc, mem, stack, self.env, context, input)
}
*/
// The base for all big integer arithmetic
base := new(big.Int)
@ -122,7 +154,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
op = context.GetOp(pc)
// calculate the new memory size and gas price for the current executing opcode
newMemSize, cost, err = self.calculateGasAndSize(context, caller, op, statedb, mem, stack)
newMemSize, cost, err = calculateGasAndSize(self.env, context, caller, op, statedb, mem, stack)
if err != nil {
return nil, err
}
@ -130,11 +162,9 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
// Use the calculated gas. When insufficient gas is present, use all gas and return an
// Out Of Gas error
if !context.UseGas(cost) {
context.UseGas(context.Gas)
return context.Return(nil), OutOfGasError
return nil, OutOfGasError
}
// Resize the memory calculated previously
mem.Resize(newMemSize.Uint64())
// Add a log message
@ -376,7 +406,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
addr := common.BigToAddress(stack.pop())
balance := statedb.GetBalance(addr)
stack.push(balance)
stack.push(new(big.Int).Set(balance))
case ORIGIN:
origin := self.env.Origin()
@ -388,7 +418,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
stack.push(common.Bytes2Big(caller.Bytes()))
case CALLVALUE:
stack.push(value)
stack.push(new(big.Int).Set(value))
case CALLDATALOAD:
data := getData(input, stack.pop(), common.Big32)
@ -441,7 +471,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
mem.Set(mOff.Uint64(), l.Uint64(), codeCopy)
case GASPRICE:
stack.push(context.Price)
stack.push(new(big.Int).Set(context.Price))
case BLOCKHASH:
num := stack.pop()
@ -471,11 +501,11 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
case DIFFICULTY:
difficulty := self.env.Difficulty()
stack.push(difficulty)
stack.push(new(big.Int).Set(difficulty))
case GASLIMIT:
stack.push(self.env.GasLimit())
stack.push(new(big.Int).Set(self.env.GasLimit()))
case PUSH1, PUSH2, PUSH3, PUSH4, PUSH5, PUSH6, PUSH7, PUSH8, PUSH9, PUSH10, PUSH11, PUSH12, PUSH13, PUSH14, PUSH15, PUSH16, PUSH17, PUSH18, PUSH19, PUSH20, PUSH21, PUSH22, PUSH23, PUSH24, PUSH25, PUSH26, PUSH27, PUSH28, PUSH29, PUSH30, PUSH31, PUSH32:
size := uint64(op - PUSH1 + 1)
@ -555,8 +585,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
case MSIZE:
stack.push(big.NewInt(int64(mem.Len())))
case GAS:
stack.push(context.Gas)
stack.push(new(big.Int).Set(context.Gas))
case CREATE:
var (
@ -652,7 +681,7 @@ func (self *Vm) Run(context *Context, input []byte) (ret []byte, err error) {
// calculateGasAndSize calculates the required given the opcode and stack items calculates the new memorysize for
// the operation. This does not reduce gas or resizes the memory.
func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *stack) (*big.Int, *big.Int, error) {
func calculateGasAndSize(env Environment, context *Context, caller ContextRef, op OpCode, statedb *state.StateDB, mem *Memory, stack *stack) (*big.Int, *big.Int, error) {
var (
gas = new(big.Int)
newMemSize *big.Int = new(big.Int)
@ -759,7 +788,7 @@ func (self *Vm) calculateGasAndSize(context *Context, caller ContextRef, op OpCo
gas.Add(gas, stack.data[stack.len()-1])
if op == CALL {
if self.env.State().GetStateObject(common.BigToAddress(stack.data[stack.len()-2])) == nil {
if env.State().GetStateObject(common.BigToAddress(stack.data[stack.len()-2])) == nil {
gas.Add(gas, params.CallNewAccountGas)
}
}

17
tests/state_test.go
View File

@ -20,8 +20,25 @@ import (
"os"
"path/filepath"
"testing"
"github.com/ethereum/go-ethereum/core/vm"
)
func init() {
if os.Getenv("JITVM") == "true" {
vm.ForceJit = true
} else {
vm.DisableJit = true
}
}
func BenchmarkStateCall1024(b *testing.B) {
fn := filepath.Join(stateTestDir, "stCallCreateCallCodeTest.json")
if err := BenchVmTest(fn, bconf{"Call1024BalanceTooLow", true, false}, b); err != nil {
b.Error(err)
}
}
func TestStateSystemOperations(t *testing.T) {
fn := filepath.Join(stateTestDir, "stSystemOperationsTest.json")
if err := RunStateTest(fn, StateSkipTests); err != nil {

56
tests/state_test_util.go
View File

@ -23,6 +23,7 @@ import (
"io"
"math/big"
"strconv"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
@ -60,6 +61,61 @@ func RunStateTest(p string, skipTests []string) error {
}
func BenchStateTest(p string, conf bconf, b *testing.B) error {
tests := make(map[string]VmTest)
if err := readJsonFile(p, &tests); err != nil {
return err
}
test, ok := tests[conf.name]
if !ok {
return fmt.Errorf("test not found: %s", conf.name)
}
pNoJit := vm.DisableJit
vm.DisableJit = conf.nojit
pForceJit := vm.ForceJit
vm.ForceJit = conf.precomp
// 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)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
benchStateTest(test, env, b)
}
vm.DisableJit = pNoJit
vm.ForceJit = pForceJit
return nil
}
func benchStateTest(test VmTest, env map[string]string, b *testing.B) {
b.StopTimer()
db, _ := ethdb.NewMemDatabase()
statedb := state.New(common.Hash{}, db)
for addr, account := range test.Pre {
obj := StateObjectFromAccount(db, addr, account)
statedb.SetStateObject(obj)
for a, v := range account.Storage {
obj.SetState(common.HexToHash(a), common.HexToHash(v))
}
}
b.StartTimer()
RunState(statedb, env, test.Exec)
}
func runStateTests(tests map[string]VmTest, skipTests []string) error {
skipTest := make(map[string]bool, len(skipTests))
for _, name := range skipTests {

14
tests/vm_test.go
View File

@ -21,6 +21,20 @@ import (
"testing"
)
func BenchmarkVmAckermann32Tests(b *testing.B) {
fn := filepath.Join(vmTestDir, "vmPerformanceTest.json")
if err := BenchVmTest(fn, bconf{"ackermann32", true, false}, b); err != nil {
b.Error(err)
}
}
func BenchmarkVmFibonacci16Tests(b *testing.B) {
fn := filepath.Join(vmTestDir, "vmPerformanceTest.json")
if err := BenchVmTest(fn, bconf{"fibonacci16", true, true}, b); err != nil {
b.Error(err)
}
}
// I've created a new function for each tests so it's easier to identify where the problem lies if any of them fail.
func TestVMArithmetic(t *testing.T) {
fn := filepath.Join(vmTestDir, "vmArithmeticTest.json")

74
tests/vm_test_util.go
View File

@ -22,6 +22,7 @@ import (
"io"
"math/big"
"strconv"
"testing"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
@ -48,8 +49,79 @@ func RunVmTestWithReader(r io.Reader, skipTests []string) error {
return nil
}
func RunVmTest(p string, skipTests []string) error {
type bconf struct {
name string
precomp bool
nojit 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)
}
pNoJit := vm.DisableJit
vm.DisableJit = conf.nojit
pForceJit := vm.ForceJit
vm.ForceJit = conf.precomp
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)
}
vm.DisableJit = pNoJit
vm.ForceJit = pForceJit
return nil
}
func benchVmTest(test VmTest, env map[string]string, b *testing.B) {
b.StopTimer()
db, _ := ethdb.NewMemDatabase()
statedb := state.New(common.Hash{}, db)
for addr, account := range test.Pre {
obj := StateObjectFromAccount(db, addr, account)
statedb.SetStateObject(obj)
for a, v := range account.Storage {
obj.SetState(common.HexToHash(a), common.HexToHash(v))
}
}
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 {