cmd/geth, jsre, rpc: run all JS code on the event loop

Some JSRE methods (PrettyPrint, ToVal) bypassed the event loop. All
calls to the JS VM are now wrapped. In order to make this somewhat more
foolproof, the otto VM is now a local variable inside the event loop.

2 files changed, 29 insertions, 18 deletions

diff --git a/cmd/geth/admin.go b/cmd/geth/admin.go
index 4c8f110e4..28786553c 100644
--- a/cmd/geth/admin.go
+++ b/cmd/geth/admin.go
@@ -144,7 +144,8 @@ func (js *jsre) pendingTransactions(call otto.FunctionCall) otto.Value {
 		}
 	}
 
-	return js.re.ToVal(ltxs)
+	v, _ := call.Otto.ToValue(ltxs)
+	return v
 }
 
 func (js *jsre) resend(call otto.FunctionCall) otto.Value {
@@ -175,7 +176,8 @@ func (js *jsre) resend(call otto.FunctionCall) otto.Value {
 		}
 		js.ethereum.TxPool().RemoveTransactions(types.Transactions{tx.tx})
 
-		return js.re.ToVal(ret)
+		v, _ := call.Otto.ToValue(ret)
+		return v
 	}
 
 	fmt.Println("first argument must be a transaction")
@@ -198,12 +200,13 @@ func (js *jsre) sign(call otto.FunctionCall) otto.Value {
 		fmt.Println(err)
 		return otto.UndefinedValue()
 	}
-	v, err := js.xeth.Sign(signer, data, false)
+	signed, err := js.xeth.Sign(signer, data, false)
 	if err != nil {
 		fmt.Println(err)
 		return otto.UndefinedValue()
 	}
-	return js.re.ToVal(v)
+	v, _ := call.Otto.ToValue(signed)
+	return v
 }
 
 func (js *jsre) debugBlock(call otto.FunctionCall) otto.Value {
@@ -237,8 +240,8 @@ func (js *jsre) setHead(call otto.FunctionCall) otto.Value {
 
 func (js *jsre) downloadProgress(call otto.FunctionCall) otto.Value {
 	current, max := js.ethereum.Downloader().Stats()
-
-	return js.re.ToVal(fmt.Sprintf("%d/%d", current, max))
+	v, _ := call.Otto.ToValue(fmt.Sprintf("%d/%d", current, max))
+	return v
 }
 
 func (js *jsre) getBlockRlp(call otto.FunctionCall) otto.Value {
@@ -248,7 +251,8 @@ func (js *jsre) getBlockRlp(call otto.FunctionCall) otto.Value {
 		return otto.UndefinedValue()
 	}
 	encoded, _ := rlp.EncodeToBytes(block)
-	return js.re.ToVal(fmt.Sprintf("%x", encoded))
+	v, _ := call.Otto.ToValue(fmt.Sprintf("%x", encoded))
+	return v
 }
 
 func (js *jsre) setExtra(call otto.FunctionCall) otto.Value {
@@ -278,8 +282,9 @@ func (js *jsre) setGasPrice(call otto.FunctionCall) otto.Value {
 	return otto.UndefinedValue()
 }
 
-func (js *jsre) hashrate(otto.FunctionCall) otto.Value {
-	return js.re.ToVal(js.ethereum.Miner().HashRate())
+func (js *jsre) hashrate(call otto.FunctionCall) otto.Value {
+	v, _ := call.Otto.ToValue(js.ethereum.Miner().HashRate())
+	return v
 }
 
 func (js *jsre) makeDAG(call otto.FunctionCall) otto.Value {
@@ -495,15 +500,18 @@ func (js *jsre) newAccount(call otto.FunctionCall) otto.Value {
 		fmt.Printf("Could not create the account: %v", err)
 		return otto.UndefinedValue()
 	}
-	return js.re.ToVal(acct.Address.Hex())
+	v, _ := call.Otto.ToValue(acct.Address.Hex())
+	return v
 }
 
 func (js *jsre) nodeInfo(call otto.FunctionCall) otto.Value {
-	return js.re.ToVal(js.ethereum.NodeInfo())
+	v, _ := call.Otto.ToValue(js.ethereum.NodeInfo())
+	return v
 }
 
 func (js *jsre) peers(call otto.FunctionCall) otto.Value {
-	return js.re.ToVal(js.ethereum.PeersInfo())
+	v, _ := call.Otto.ToValue(js.ethereum.PeersInfo())
+	return v
 }
 
 func (js *jsre) importChain(call otto.FunctionCall) otto.Value {
@@ -562,7 +570,8 @@ func (js *jsre) dumpBlock(call otto.FunctionCall) otto.Value {
 
 	statedb := state.New(block.Root(), js.ethereum.StateDb())
 	dump := statedb.RawDump()
-	return js.re.ToVal(dump)
+	v, _ := call.Otto.ToValue(dump)
+	return v
 }
 
 func (js *jsre) waitForBlocks(call otto.FunctionCall) otto.Value {
@@ -611,7 +620,8 @@ func (js *jsre) waitForBlocks(call otto.FunctionCall) otto.Value {
 		return otto.UndefinedValue()
 	case height = <-wait:
 	}
-	return js.re.ToVal(height.Uint64())
+	v, _ := call.Otto.ToValue(height.Uint64())
+	return v
 }
 
 func (js *jsre) sleep(call otto.FunctionCall) otto.Value {
@@ -704,8 +714,8 @@ func (js *jsre) register(call otto.FunctionCall) otto.Value {
 		return otto.UndefinedValue()
 	}
 
-	return js.re.ToVal(contenthash.Hex())
-
+	v, _ := call.Otto.ToValue(contenthash.Hex())
+	return v
 }
 
 func (js *jsre) registerUrl(call otto.FunctionCall) otto.Value {
@@ -764,7 +774,8 @@ func (js *jsre) getContractInfo(call otto.FunctionCall) otto.Value {
 		fmt.Println(err)
 		return otto.UndefinedValue()
 	}
-	return js.re.ToVal(info)
+	v, _ := call.Otto.ToValue(info)
+	return v
 }
 
 func (js *jsre) startNatSpec(call otto.FunctionCall) otto.Value {
diff --git a/cmd/geth/js.go b/cmd/geth/js.go
index 342a80bd2..0fb234d45 100644
--- a/cmd/geth/js.go
+++ b/cmd/geth/js.go
@@ -104,7 +104,7 @@ func newJSRE(ethereum *eth.Ethereum, libPath, corsDomain string, interactive boo
 func (js *jsre) apiBindings(f xeth.Frontend) {
 	xe := xeth.New(js.ethereum, f)
 	ethApi := rpc.NewEthereumApi(xe)
-	jeth := rpc.NewJeth(ethApi, js.re.ToVal, js.re)
+	jeth := rpc.NewJeth(ethApi, js.re)
 
 	js.re.Set("jeth", struct{}{})
 	t, _ := js.re.Get("jeth")