EIP161, State Trie Clearing (#28)

* implemented EIP 161 logic * implemented EIP 161 logic * fixed bug * no more segfaults * Byzantium Tests Passing. Certain Homestead Failing * Fixed implementation to pass (almost) all tests * Updated testing framework to run all ETH directories * Reimpl EIP161 SUICIDE and CALL edge cases * Skip unimplemented functionality tests * proper indentation
eth-classic · May 21, 2019 · 61b178b · 61b178b
1 parent f0ac799
commit 61b178b
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Showing 6 changed files with 114 additions and 29 deletions.
diff --git a/core/execution.go b/core/execution.go
@@ -95,15 +95,26 @@ func exec(env vm.Environment, caller vm.ContractRef, address, codeAddr *common.A
 		from = env.Db().GetAccount(caller.Address())
 		to   vm.Account
 	)
+
 	if createAccount {
 		to = env.Db().CreateAccount(*address)
+
+		if env.RuleSet().IsAtlantis(env.BlockNumber()) {
+			env.Db().SetNonce(*address, 1)
+		}
 	} else {
 		if !env.Db().Exist(*address) {
+			//no account may change state from non-existent to existent-but-empty. Refund sender.
+			if vm.Precompiled[(*address).Str()] == nil && env.RuleSet().IsAtlantis(env.BlockNumber()) && value.BitLen() == 0 {
+				caller.ReturnGas(gas, gasPrice)
+				return nil, common.Address{}, nil
+			}
 			to = env.Db().CreateAccount(*address)
 		} else {
 			to = env.Db().GetAccount(*address)
 		}
 	}
+
 	env.Transfer(from, to, value)
 
 	// initialise a new contract and set the code that is to be used by the
@@ -133,8 +144,8 @@ func exec(env vm.Environment, caller vm.ContractRef, address, codeAddr *common.A
 	// above we revert to the snapshot and consume any gas remaining. Additionally
 	// when we're in homestead this also counts for code storage gas errors.
 	if err != nil && (env.RuleSet().IsHomestead(env.BlockNumber()) || err != vm.CodeStoreOutOfGasError) {
-		contract.UseGas(contract.Gas)
 
+		contract.UseGas(contract.Gas)
 		env.RevertToSnapshot(snapshotPreTransfer)
 	}
 

diff --git a/core/state/statedb.go b/core/state/statedb.go
@@ -191,6 +191,12 @@ func (self *StateDB) AddRefund(gas *big.Int) {
 	self.refund.Add(self.refund, gas)
 }
 
+//Empty returns if the account address is considered non-existant or empty
+//(balance, nonce, and code all equal 0)
+func (self *StateDB) Empty(addr common.Address) bool {
+	return self.getStateObject(addr) == nil || self.getStateObject(addr).empty()
+}
+
 // Exist reports whether the given account address exists in the state.
 // Notably this also returns true for suicided accounts.
 func (self *StateDB) Exist(addr common.Address) bool {

diff --git a/core/vm/environment.go b/core/vm/environment.go
@@ -115,6 +115,7 @@ type Database interface {
 	// Exist reports whether the given account exists in state.
 	// Notably this should also return true for suicided accounts.
 	Exist(common.Address) bool
+	Empty(common.Address) bool
 }
 
 // Account represents a contract or basic ethereum account.

diff --git a/core/vm/vm.go b/core/vm/vm.go
@@ -186,6 +186,7 @@ func calculateGasAndSize(gasTable *GasTable, env Environment, contract *Contract
 	var (
 		gas                 = new(big.Int)
 		newMemSize *big.Int = new(big.Int)
+		isAtlantis          = env.RuleSet().IsAtlantis(env.BlockNumber())
 	)
 	err := baseCheck(op, stack, gas)
 	if err != nil {
@@ -195,10 +196,15 @@ func calculateGasAndSize(gasTable *GasTable, env Environment, contract *Contract
 	// stack Check, memory resize & gas phase
 	switch op {
 	case SUICIDE:
+		address := common.BigToAddress(stack.data[len(stack.data)-1])
 		// if suicide is not nil: homestead gas fork
 		if gasTable.CreateBySuicide != nil {
 			gas.Set(gasTable.Suicide)
-			if !env.Db().Exist(common.BigToAddress(stack.data[len(stack.data)-1])) {
+			if isAtlantis {
+				if env.Db().Empty(address) && env.Db().GetBalance(contract.Address()).Sign() != 0 {
+					gas.Add(gas, gasTable.CreateBySuicide)
+				}
+			} else if !env.Db().Exist(address) {
 				gas.Add(gas, gasTable.CreateBySuicide)
 			}
 		}
@@ -324,7 +330,13 @@ func calculateGasAndSize(gasTable *GasTable, env Environment, contract *Contract
 		gas.Set(gasTable.Calls)
 
 		if op == CALL {
-			if !env.Db().Exist(common.BigToAddress(stack.data[stack.len()-2])) {
+			address := common.BigToAddress(stack.data[stack.len()-2])
+			transfersValue := stack.data[stack.len()-3].Sign() != 0
+			if isAtlantis {
+				if transfersValue && env.Db().Empty(address) {
+					gas.Add(gas, big.NewInt(25000))
+				}
+			} else if !env.Db().Exist(address) {
 				gas.Add(gas, big.NewInt(25000))
 			}
 		}

diff --git a/tests/state_test.go b/tests/state_test.go
@@ -670,30 +670,80 @@ func TestEIP150HomesteadBounds(t *testing.T) {
 	}
 }
 
-// func TestETHRevert(t *testing.T) {
-// 	skipTests := make(map[string]string)
-
-// 	// Bugs in these tests
-// 	skipTests["RevertPrecompiledTouch.json/Byzantium/0"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch.json/Byzantium/3"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch.json/Constantinople/0"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch.json/Constantinople/3"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch.json/ConstantinopleFix/0"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch.json/ConstantinopleFix/3"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch_storage.json/Byzantium/0"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch_storage.json/Byzantium/3"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch_storage.json/Constantinople/0"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch_storage.json/Constantinople/3"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch_storage.json/ConstantinopleFix/0"] = "Bug in Test"
-// 	skipTests["RevertPrecompiledTouch_storage.json/ConstantinopleFix/3"] = "Bug in Test"
-
-// 	fns, _ := filepath.Glob(filepath.Join(ethGeneralStateDir, "stRevertTest", "*"))
-// 	runETHTests(t, fns, skipTests)
-// }
-
-func TestETHHomestead(t *testing.T) {
-	fns, _ := filepath.Glob(filepath.Join(ethGeneralStateDir, "stHomesteadSpecific", "*"))
-	runETHTests(t, fns, make(map[string]string))
+func TestAllETH(t *testing.T) {
+	dirNames, _ := filepath.Glob(filepath.Join(ethGeneralStateDir, "*"))
+
+	skipTests := make(map[string]string)
+
+	// Bugs in these tests (Always skip)
+	skipTests["RevertPrecompiledTouch.json/Byzantium/0"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch.json/Byzantium/3"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch.json/Constantinople/0"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch.json/Constantinople/3"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch.json/ConstantinopleFix/0"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch.json/ConstantinopleFix/3"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch_storage.json/Byzantium/0"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch_storage.json/Byzantium/3"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch_storage.json/Constantinople/0"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch_storage.json/Constantinople/3"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch_storage.json/ConstantinopleFix/0"] = "Bug in Test"
+	skipTests["RevertPrecompiledTouch_storage.json/ConstantinopleFix/3"] = "Bug in Test"
+
+	// TODO: Remove following skipped tests:
+
+	// EIP 684 Implementations
+	skipTests["TransactionCollisionToEmptyButCode.json"] = "Not Implemented"
+	skipTests["TransactionCollisionToEmpty.json"] = "Not Implemented"
+	skipTests["TransactionCollisionToEmptyButNonce.json"] = "Not Implemented"
+	skipTests["CreateCollisionToEmpty.json"] = "Not Implemented"
+	skipTests["CreateHashCollision.json"] = "Not Implemented"
+	skipTests["createJS_ExampleContract.json"] = "Not Implemented"
+
+	// StaticCall implementations
+	skipTests["staticcall_createfails.json"] = "STATICCALL Not Implemented"
+
+	// Revert Implementations
+	skipTests["FailedCreateRevertsDeletion.json"] = "REVERT Not Implemented"
+	skipTests["CreateOOGafterInitCodeRevert.json"] = "REVERT Not Implemented"
+	skipTests["CreateOOGafterInitCodeRevert2.json"] = "REVERT Not Implemented"
+
+	// EIP 211 Implementations
+	skipTests["CreateOOGafterInitCodeReturndataSize.json"] = "REVERT Not Implemented"
+	skipTests["CreateOOGafterInitCodeReturndata2.json"] = "REVERT Not Implemented"
+
+	// Random Test failures (REVISIT)
+	skipTests["randomStatetest642.json"] = "random unimplemented"
+	skipTests["randomStatetest644.json"] = "random unimplemented"
+	skipTests["randomStatetest645.json"] = "random unimplemented"
+	skipTests["Opcodes_TransactionInit.json/Byzantium/37"] = "random unimplemented"
+	skipTests["Opcodes_TransactionInit.json/Byzantium/38"] = "random unimplemented"
+	skipTests["Opcodes_TransactionInit.json/Byzantium/125"] = "random unimplemented"
+	skipTests["Opcodes_TransactionInit.json/Byzantium/126"] = "random unimplemented"
+	skipTests["CREATE_ContractRETURNBigOffset.json"] = "random unimplemented"
+
+	unsupportedDirs := map[string]bool{
+		"stStaticCall":            true,
+		"stZeroKnowledge":         true,
+		"stZeroKnowledge2":        true,
+		"stRevertTest":            true,
+		"stReturnDataTest":        true,
+		"stPreCompiledContracts":  true,
+		"stPreCompiledContracts2": true,
+		"stCodeSizeLimit":         true,
+		"stCreate2":               true,
+	}
+
+	for _, dn := range dirNames {
+		dirName := dn[strings.LastIndex(dn, "/")+1 : len(dn)]
+		if unsupportedDirs[dirName] {
+			continue
+		}
+
+		t.Run(dirName, func(t *testing.T) {
+			fns, _ := filepath.Glob(filepath.Join(ethGeneralStateDir, dirName, "*"))
+			runETHTests(t, fns, skipTests)
+		})
+	}
 }
 
 func runETHTests(t *testing.T, fileNames []string, skipTests map[string]string) {
@@ -709,6 +759,12 @@ func runETHTests(t *testing.T, fileNames []string, skipTests map[string]string)
 	}
 
 	for _, fn := range fileNames {
+		fileName := fn[strings.LastIndex(fn, "/")+1 : len(fn)]
+
+		if fileName[strings.LastIndex(fileName, ".")+1:len(fileName)] != "json" {
+			continue
+		}
+
 		// Fill StateTest mapping with tests from file
 		stateTests, err := CreateStateTests(fn)
 		if err != nil {
@@ -717,7 +773,6 @@ func runETHTests(t *testing.T, fileNames []string, skipTests map[string]string)
 		}
 
 		// JSON file subtest
-		fileName := fn[strings.LastIndex(fn, "/")+1 : len(fn)]
 		t.Run(fileName, func(t *testing.T) {
 			// Check if file is skipped
 			if skipTests[fileName] != "" {

diff --git a/tests/state_test_util.go b/tests/state_test_util.go
@@ -190,7 +190,7 @@ func runStateTest(ruleSet RuleSet, test VmTest) error {
 	// check post state
 	for addr, account := range test.Post {
 		obj := statedb.GetAccount(common.HexToAddress(addr))
-		if obj == nil {
+		if obj == nil || obj.(*state.StateObject) == nil {
 			return fmt.Errorf("did not find expected post-state account: %s", addr)
 		}
 		// Because vm.Account interface does not have Nonce method, so after