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authorJeffrey Wilcke <geffobscura@gmail.com>2015-10-09 20:56:12 +0800
committerJeffrey Wilcke <geffobscura@gmail.com>2015-11-18 23:50:20 +0800
commit1372b991c3d346df00dc6fba328d518ea5e203d6 (patch)
tree01a852f43299998a2c68e13eeca9ea6b794d0bf6
parent9422eec55460aaca300cabd52124ed0cbd8dedd3 (diff)
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core/vm/runtime: added simple execution runtime
The runtime environment can be used for simple basic execution of contract code without the requirement of setting up a full stack and operates fully in memory.
-rw-r--r--core/vm/runtime/doc.go18
-rw-r--r--core/vm/runtime/env.go106
-rw-r--r--core/vm/runtime/runtime.go121
-rw-r--r--core/vm/runtime/runtime_example_test.go34
-rw-r--r--core/vm/runtime/runtime_test.go120
5 files changed, 399 insertions, 0 deletions
diff --git a/core/vm/runtime/doc.go b/core/vm/runtime/doc.go
new file mode 100644
index 000000000..a3b464a7d
--- /dev/null
+++ b/core/vm/runtime/doc.go
@@ -0,0 +1,18 @@
+// 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 runtime provides a basic execution model for executing EVM code.
+package runtime
diff --git a/core/vm/runtime/env.go b/core/vm/runtime/env.go
new file mode 100644
index 000000000..22f9ea14d
--- /dev/null
+++ b/core/vm/runtime/env.go
@@ -0,0 +1,106 @@
+// 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 runtime
+
+import (
+ "math/big"
+
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/core"
+ "github.com/ethereum/go-ethereum/core/state"
+ "github.com/ethereum/go-ethereum/core/vm"
+)
+
+// Env is a basic runtime environment required for running the EVM.
+type Env struct {
+ depth int
+ state *state.StateDB
+
+ origin common.Address
+ coinbase common.Address
+
+ number *big.Int
+ time *big.Int
+ difficulty *big.Int
+ gasLimit *big.Int
+
+ logs []vm.StructLog
+
+ getHashFn func(uint64) common.Hash
+}
+
+// NewEnv returns a new vm.Environment
+func NewEnv(cfg *Config, state *state.StateDB) vm.Environment {
+ return &Env{
+ state: state,
+ origin: cfg.Origin,
+ coinbase: cfg.Coinbase,
+ number: cfg.BlockNumber,
+ time: cfg.Time,
+ difficulty: cfg.Difficulty,
+ gasLimit: cfg.GasLimit,
+ }
+}
+
+func (self *Env) StructLogs() []vm.StructLog {
+ return self.logs
+}
+
+func (self *Env) AddStructLog(log vm.StructLog) {
+ self.logs = append(self.logs, log)
+}
+
+func (self *Env) Origin() common.Address { return self.origin }
+func (self *Env) BlockNumber() *big.Int { return self.number }
+func (self *Env) Coinbase() common.Address { return self.coinbase }
+func (self *Env) Time() *big.Int { return self.time }
+func (self *Env) Difficulty() *big.Int { return self.difficulty }
+func (self *Env) Db() vm.Database { return self.state }
+func (self *Env) GasLimit() *big.Int { return self.gasLimit }
+func (self *Env) VmType() vm.Type { return vm.StdVmTy }
+func (self *Env) GetHash(n uint64) common.Hash {
+ return self.getHashFn(n)
+}
+func (self *Env) AddLog(log *vm.Log) {
+ self.state.AddLog(log)
+}
+func (self *Env) Depth() int { return self.depth }
+func (self *Env) SetDepth(i int) { self.depth = i }
+func (self *Env) CanTransfer(from common.Address, balance *big.Int) bool {
+ return self.state.GetBalance(from).Cmp(balance) >= 0
+}
+func (self *Env) MakeSnapshot() vm.Database {
+ return self.state.Copy()
+}
+func (self *Env) SetSnapshot(copy vm.Database) {
+ self.state.Set(copy.(*state.StateDB))
+}
+
+func (self *Env) Transfer(from, to vm.Account, amount *big.Int) {
+ core.Transfer(from, to, amount)
+}
+
+func (self *Env) Call(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
+ return core.Call(self, caller, addr, data, gas, price, value)
+}
+func (self *Env) CallCode(caller vm.ContractRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
+ return core.CallCode(self, caller, addr, data, gas, price, value)
+}
+
+func (self *Env) Create(caller vm.ContractRef, data []byte, gas, price, value *big.Int) ([]byte, common.Address, error) {
+ return core.Create(self, caller, data, gas, price, value)
+}
diff --git a/core/vm/runtime/runtime.go b/core/vm/runtime/runtime.go
new file mode 100644
index 000000000..dd3aa1b0b
--- /dev/null
+++ b/core/vm/runtime/runtime.go
@@ -0,0 +1,121 @@
+// 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 runtime
+
+import (
+ "math/big"
+ "time"
+
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/core/state"
+ "github.com/ethereum/go-ethereum/core/vm"
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/ethdb"
+)
+
+// Config is a basic type specifing certain configuration flags for running
+// the EVM.
+type Config struct {
+ Difficulty *big.Int
+ Origin common.Address
+ Coinbase common.Address
+ BlockNumber *big.Int
+ Time *big.Int
+ GasLimit *big.Int
+ GasPrice *big.Int
+ Value *big.Int
+ DisableJit bool // "disable" so it's enabled by default
+ Debug bool
+
+ GetHashFn func(n uint64) common.Hash
+}
+
+// sets defaults on the config
+func setDefaults(cfg *Config) {
+ if cfg.Difficulty == nil {
+ cfg.Difficulty = new(big.Int)
+ }
+ if cfg.Time == nil {
+ cfg.Time = big.NewInt(time.Now().Unix())
+ }
+ if cfg.GasLimit == nil {
+ cfg.GasLimit = new(big.Int).Set(common.MaxBig)
+ }
+ if cfg.GasPrice == nil {
+ cfg.GasPrice = new(big.Int)
+ }
+ if cfg.Value == nil {
+ cfg.Value = new(big.Int)
+ }
+ if cfg.BlockNumber == nil {
+ cfg.BlockNumber = new(big.Int)
+ }
+ if cfg.GetHashFn == nil {
+ cfg.GetHashFn = func(n uint64) common.Hash {
+ return common.BytesToHash(crypto.Sha3([]byte(new(big.Int).SetUint64(n).String())))
+ }
+ }
+}
+
+// Execute executes the code using the input as call data during the execution.
+// It returns the EVM's return value, the new state and an error if it failed.
+//
+// Executes sets up a in memory, temporarily, environment for the execution of
+// the given code. It enabled the JIT by default and make sure that it's restored
+// to it's original state afterwards.
+func Execute(code, input []byte, cfg *Config) ([]byte, *state.StateDB, error) {
+ if cfg == nil {
+ cfg = new(Config)
+ }
+ setDefaults(cfg)
+
+ // defer the call to setting back the original values
+ defer func(debug, forceJit, enableJit bool) {
+ vm.Debug = debug
+ vm.ForceJit = forceJit
+ vm.EnableJit = enableJit
+ }(vm.Debug, vm.ForceJit, vm.EnableJit)
+
+ vm.ForceJit = !cfg.DisableJit
+ vm.EnableJit = !cfg.DisableJit
+ vm.Debug = cfg.Debug
+
+ var (
+ db, _ = ethdb.NewMemDatabase()
+ statedb, _ = state.New(common.Hash{}, db)
+ vmenv = NewEnv(cfg, statedb)
+ sender = statedb.CreateAccount(cfg.Origin)
+ receiver = statedb.CreateAccount(common.StringToAddress("contract"))
+ )
+ // set the receiver's (the executing contract) code for execution.
+ receiver.SetCode(code)
+
+ // Call the code with the given configuration.
+ ret, err := vmenv.Call(
+ sender,
+ receiver.Address(),
+ input,
+ cfg.GasLimit,
+ cfg.GasPrice,
+ cfg.Value,
+ )
+
+ if cfg.Debug {
+ vm.StdErrFormat(vmenv.StructLogs())
+ }
+ return ret, statedb, err
+}
diff --git a/core/vm/runtime/runtime_example_test.go b/core/vm/runtime/runtime_example_test.go
new file mode 100644
index 000000000..b7d0ddc38
--- /dev/null
+++ b/core/vm/runtime/runtime_example_test.go
@@ -0,0 +1,34 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package runtime_test
+
+import (
+ "fmt"
+
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/core/vm/runtime"
+)
+
+func ExampleExecute() {
+ ret, _, err := runtime.Execute(common.Hex2Bytes("6060604052600a8060106000396000f360606040526008565b00"), nil, nil)
+ if err != nil {
+ fmt.Println(err)
+ }
+ fmt.Println(ret)
+ // Output:
+ // [96 96 96 64 82 96 8 86 91 0]
+}
diff --git a/core/vm/runtime/runtime_test.go b/core/vm/runtime/runtime_test.go
new file mode 100644
index 000000000..773a0163e
--- /dev/null
+++ b/core/vm/runtime/runtime_test.go
@@ -0,0 +1,120 @@
+// Copyright 2015 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package runtime
+
+import (
+ "strings"
+ "testing"
+
+ "github.com/ethereum/go-ethereum/accounts/abi"
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/core/vm"
+)
+
+func TestDefaults(t *testing.T) {
+ cfg := new(Config)
+ setDefaults(cfg)
+
+ if cfg.Difficulty == nil {
+ t.Error("expected difficulty to be non nil")
+ }
+
+ if cfg.Time == nil {
+ t.Error("expected time to be non nil")
+ }
+ if cfg.GasLimit == nil {
+ t.Error("expected time to be non nil")
+ }
+ if cfg.GasPrice == nil {
+ t.Error("expected time to be non nil")
+ }
+ if cfg.Value == nil {
+ t.Error("expected time to be non nil")
+ }
+ if cfg.GetHashFn == nil {
+ t.Error("expected time to be non nil")
+ }
+ if cfg.BlockNumber == nil {
+ t.Error("expected block number to be non nil")
+ }
+}
+
+func TestEnvironment(t *testing.T) {
+ defer func() {
+ if r := recover(); r != nil {
+ t.Fatalf("crashed with: %v", r)
+ }
+ }()
+
+ Execute([]byte{
+ byte(vm.DIFFICULTY),
+ byte(vm.TIMESTAMP),
+ byte(vm.GASLIMIT),
+ byte(vm.PUSH1),
+ byte(vm.ORIGIN),
+ byte(vm.BLOCKHASH),
+ byte(vm.COINBASE),
+ }, nil, nil)
+}
+
+func TestRestoreDefaults(t *testing.T) {
+ Execute(nil, nil, &Config{Debug: true})
+ if vm.ForceJit {
+ t.Error("expected force jit to be disabled")
+ }
+
+ if vm.Debug {
+ t.Error("expected debug to be disabled")
+ }
+
+ if vm.EnableJit {
+ t.Error("expected jit to be disabled")
+ }
+}
+
+func BenchmarkCall(b *testing.B) {
+ var definition = `[{"constant":true,"inputs":[],"name":"seller","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[],"name":"abort","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"value","outputs":[{"name":"","type":"uint256"}],"type":"function"},{"constant":false,"inputs":[],"name":"refund","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"buyer","outputs":[{"name":"","type":"address"}],"type":"function"},{"constant":false,"inputs":[],"name":"confirmReceived","outputs":[],"type":"function"},{"constant":true,"inputs":[],"name":"state","outputs":[{"name":"","type":"uint8"}],"type":"function"},{"constant":false,"inputs":[],"name":"confirmPurchase","outputs":[],"type":"function"},{"inputs":[],"type":"constructor"},{"anonymous":false,"inputs":[],"name":"Aborted","type":"event"},{"anonymous":false,"inputs":[],"name":"PurchaseConfirmed","type":"event"},{"anonymous":false,"inputs":[],"name":"ItemReceived","type":"event"},{"anonymous":false,"inputs":[],"name":"Refunded","type":"event"}]`
+
+ var code = common.Hex2Bytes("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")
+
+ abi, err := abi.JSON(strings.NewReader(definition))
+ if err != nil {
+ b.Fatal(err)
+ }
+
+ cpurchase, err := abi.Pack("confirmPurchase")
+ if err != nil {
+ b.Fatal(err)
+ }
+ creceived, err := abi.Pack("confirmReceived")
+ if err != nil {
+ b.Fatal(err)
+ }
+ refund, err := abi.Pack("refund")
+ if err != nil {
+ b.Fatal(err)
+ }
+
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ for j := 0; j < 400; j++ {
+ Execute(code, cpurchase, nil)
+ Execute(code, creceived, nil)
+ Execute(code, refund, nil)
+ }
+ }
+}