Support for EVMC

cmd/evm/runner.go

@@ -215,6 +215,10 @@ func runCmd(ctx *cli.Context) error {
 		},
 	}
 
+	if runtimeConfig.EVMConfig.EVMInterpreter != "" {
+		vm.InitEVMCEVM(runtimeConfig.EVMConfig.EVMInterpreter)
+	}
+
 	if cpuProfilePath := ctx.GlobalString(CPUProfileFlag.Name); cpuProfilePath != "" {
 		f, err := os.Create(cpuProfilePath)
 		if err != nil {

cmd/utils/flags.go

@@ -1539,10 +1539,12 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
 
 	if ctx.GlobalIsSet(EWASMInterpreterFlag.Name) {
 		cfg.EWASMInterpreter = ctx.GlobalString(EWASMInterpreterFlag.Name)
+		vm.InitEVMCEwasm(cfg.EWASMInterpreter)
 	}
 
 	if ctx.GlobalIsSet(EVMInterpreterFlag.Name) {
 		cfg.EVMInterpreter = ctx.GlobalString(EVMInterpreterFlag.Name)
+		vm.InitEVMCEVM(cfg.EVMInterpreter)
 	}
 	if ctx.GlobalIsSet(RPCGlobalGasCap.Name) {
 		cfg.RPCGasCap = new(big.Int).SetUint64(ctx.GlobalUint64(RPCGlobalGasCap.Name))

core/vm/evm.go

@@ -22,6 +22,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"github.com/ethereum/evmc/v7/bindings/go/evmc"
+
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/params"
@@ -135,33 +137,29 @@ type EVM struct {
 // only ever be used *once*.
 func NewEVM(ctx Context, statedb StateDB, chainConfig *params.ChainConfig, vmConfig Config) *EVM {
 	evm := &EVM{
-		Context:      ctx,
-		StateDB:      statedb,
-		vmConfig:     vmConfig,
-		chainConfig:  chainConfig,
-		chainRules:   chainConfig.Rules(ctx.BlockNumber),
-		interpreters: make([]Interpreter, 0, 1),
+		Context:     ctx,
+		StateDB:     statedb,
+		vmConfig:    vmConfig,
+		chainConfig: chainConfig,
+		chainRules:  chainConfig.Rules(ctx.BlockNumber),
+		// The list of interpreters, space reserved for both EVM and EWASM ones.
+		interpreters: make([]Interpreter, 0, 2),
 	}
 
 	if chainConfig.IsEWASM(ctx.BlockNumber) {
-		// to be implemented by EVM-C and Wagon PRs.
-		// if vmConfig.EWASMInterpreter != "" {
-		//  extIntOpts := strings.Split(vmConfig.EWASMInterpreter, ":")
-		//  path := extIntOpts[0]
-		//  options := []string{}
-		//  if len(extIntOpts) > 1 {
-		//    options = extIntOpts[1..]
-		//  }
-		//  evm.interpreters = append(evm.interpreters, NewEVMVCInterpreter(evm, vmConfig, options))
-		// } else {
-		// 	evm.interpreters = append(evm.interpreters, NewEWASMInterpreter(evm, vmConfig))
-		// }
-		panic("No supported ewasm interpreter yet.")
-	}
-
-	// vmConfig.EVMInterpreter will be used by EVM-C, it won't be checked here
-	// as we always want to have the built-in EVM as the failover option.
-	evm.interpreters = append(evm.interpreters, NewEVMInterpreter(evm, vmConfig))
+		if vmConfig.EWASMInterpreter != "" {
+			evm.interpreters = append(evm.interpreters, &EVMC{ewasmModule, evm, evmc.CapabilityEWASM, false})
+		} else {
+			panic("The default ewasm interpreter not supported yet.")
+		}
+	}
+
+	if vmConfig.EVMInterpreter != "" {
+		evm.interpreters = append(evm.interpreters, &EVMC{evmModule, evm, evmc.CapabilityEVM1, false})
+	} else {
+		evm.interpreters = append(evm.interpreters, NewEVMInterpreter(evm, vmConfig))
+	}
+
 	evm.interpreter = evm.interpreters[0]
 
 	return evm