From 8ccde784f9035c0a7a8f234994538c817c5b9de7 Mon Sep 17 00:00:00 2001
From: obscuren <geffobscura@gmail.com>
Date: Sun, 1 Feb 2015 15:30:29 +0100
Subject: Added (disabled) Jit validation

---
 core/execution.go        |  3 +--
 core/state_transition.go | 25 +++++++++++++++++++++++++
 core/vm_env.go           |  4 ++++
 3 files changed, 30 insertions(+), 2 deletions(-)

(limited to 'core')

diff --git a/core/execution.go b/core/execution.go
index cad4e84aa..5e0cbd37e 100644
--- a/core/execution.go
+++ b/core/execution.go
@@ -33,8 +33,7 @@ func (self *Execution) Call(codeAddr []byte, caller vm.ContextRef) ([]byte, erro
 
 func (self *Execution) exec(code, contextAddr []byte, caller vm.ContextRef) (ret []byte, err error) {
 	env := self.env
-	evm := vm.New(env)
-
+	evm := vm.NewVm(env)
 	if env.Depth() == vm.MaxCallDepth {
 		caller.ReturnGas(self.Gas, self.price)
 
diff --git a/core/state_transition.go b/core/state_transition.go
index 8b0ca2ac4..00d9d486a 100644
--- a/core/state_transition.go
+++ b/core/state_transition.go
@@ -10,6 +10,8 @@ import (
 	"github.com/ethereum/go-ethereum/vm"
 )
 
+const tryJit = false
+
 /*
  * The State transitioning model
  *
@@ -184,6 +186,7 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 		return
 	}
 
+	stateCopy := self.env.State().Copy()
 	vmenv := self.env
 	var ref vm.ContextRef
 	if MessageCreatesContract(msg) {
@@ -196,8 +199,30 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 				ref.SetCode(ret)
 			}
 		}
+
+		if vmenv, ok := vmenv.(*VMEnv); ok && tryJit {
+			statelogger.Infof("CREATE: re-running using JIT (PH=%x)\n", stateCopy.Root()[:4])
+			// re-run using the JIT (validation for the JIT)
+			goodState := vmenv.State().Copy()
+			vmenv.state = stateCopy
+			vmenv.SetVmType(vm.JitVmTy)
+			vmenv.Create(sender, contract.Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
+			statelogger.Infof("DONE PH=%x STD_H=%x JIT_H=%x\n", stateCopy.Root()[:4], goodState.Root()[:4], vmenv.State().Root()[:4])
+			self.state.Set(goodState)
+		}
 	} else {
 		ret, err = vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
+
+		if vmenv, ok := vmenv.(*VMEnv); ok && tryJit {
+			statelogger.Infof("CALL: re-running using JIT (PH=%x)\n", stateCopy.Root()[:4])
+			// re-run using the JIT (validation for the JIT)
+			goodState := vmenv.State().Copy()
+			vmenv.state = stateCopy
+			vmenv.SetVmType(vm.JitVmTy)
+			vmenv.Call(self.From(), self.To().Address(), self.msg.Data(), self.gas, self.gasPrice, self.value)
+			statelogger.Infof("DONE PH=%x STD_H=%x JIT_H=%x\n", stateCopy.Root()[:4], goodState.Root()[:4], vmenv.State().Root()[:4])
+			self.state.Set(goodState)
+		}
 	}
 
 	if err != nil {
diff --git a/core/vm_env.go b/core/vm_env.go
index 624a63333..c7491bcdc 100644
--- a/core/vm_env.go
+++ b/core/vm_env.go
@@ -14,6 +14,7 @@ type VMEnv struct {
 	msg   Message
 	depth int
 	chain *ChainManager
+	typ   vm.Type
 }
 
 func NewEnv(state *state.StateDB, chain *ChainManager, msg Message, block *types.Block) *VMEnv {
@@ -22,6 +23,7 @@ func NewEnv(state *state.StateDB, chain *ChainManager, msg Message, block *types
 		state: state,
 		block: block,
 		msg:   msg,
+		typ:   vm.StdVmTy,
 	}
 }
 
@@ -35,6 +37,8 @@ func (self *VMEnv) Value() *big.Int       { return self.msg.Value() }
 func (self *VMEnv) State() *state.StateDB { return self.state }
 func (self *VMEnv) Depth() int            { return self.depth }
 func (self *VMEnv) SetDepth(i int)        { self.depth = i }
+func (self *VMEnv) VmType() vm.Type       { return self.typ }
+func (self *VMEnv) SetVmType(t vm.Type)   { self.typ = t }
 func (self *VMEnv) GetHash(n uint64) []byte {
 	if block := self.chain.GetBlockByNumber(n); block != nil {
 		return block.Hash()
-- 
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