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eth/tracers, core: use scopecontext in tracers, provide statedb in capturestart (#22333)

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Fixes the CaptureStart api to include the EVM, thus being able to set the statedb early on. This pr also exposes the struct we used internally in the interpreter to encapsulate the contract, mem, stack, rstack, so we pass it as a single struct to the tracer, and removes the error returns on the capture methods.
pull/22573/head
Martin Holst Swende 4 years ago committed by GitHub
parent c5df05b9a9
commit 0fda25e471
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 384 additions and 365 deletions
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  1. 10
      core/vm/eips.go
  2. 6
      core/vm/evm.go
  3. 424
      core/vm/instructions.go
  4. 16
      core/vm/instructions_test.go
  5. 24
      core/vm/interpreter.go
  6. 2
      core/vm/jump_table.go
  7. 44
      core/vm/logger.go
  8. 23
      core/vm/logger_json.go
  9. 16
      core/vm/logger_test.go
  10. 19
      core/vm/runtime/runtime_test.go
  11. 113
      eth/tracers/tracer.go
  12. 52
      eth/tracers/tracer_test.go

10
core/vm/eips.go
Unescape View File

@ -76,9 +76,9 @@ func enable1884(jt *JumpTable) {
} }
} }
func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSelfBalance(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(callContext.contract.Address())) balance, _ := uint256.FromBig(interpreter.evm.StateDB.GetBalance(scope.Contract.Address()))
callContext.stack.push(balance) scope.Stack.push(balance)
return nil, nil return nil, nil
} }
@ -95,9 +95,9 @@ func enable1344(jt *JumpTable) {
} }
// opChainID implements CHAINID opcode // opChainID implements CHAINID opcode
func opChainID(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opChainID(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
chainId, _ := uint256.FromBig(interpreter.evm.chainConfig.ChainID) chainId, _ := uint256.FromBig(interpreter.evm.chainConfig.ChainID)
callContext.stack.push(chainId) scope.Stack.push(chainId)
return nil, nil return nil, nil
} }

6
core/vm/evm.go
Unescape View File

@ -239,7 +239,7 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
if !isPrecompile && evm.chainRules.IsEIP158 && value.Sign() == 0 { if !isPrecompile && evm.chainRules.IsEIP158 && value.Sign() == 0 {
// Calling a non existing account, don't do anything, but ping the tracer // Calling a non existing account, don't do anything, but ping the tracer
if evm.vmConfig.Debug && evm.depth == 0 { if evm.vmConfig.Debug && evm.depth == 0 {
evm.vmConfig.Tracer.CaptureStart(caller.Address(), addr, false, input, gas, value) evm.vmConfig.Tracer.CaptureStart(evm, caller.Address(), addr, false, input, gas, value)
evm.vmConfig.Tracer.CaptureEnd(ret, 0, 0, nil) evm.vmConfig.Tracer.CaptureEnd(ret, 0, 0, nil)
} }
return nil, gas, nil return nil, gas, nil
@ -250,7 +250,7 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
// Capture the tracer start/end events in debug mode // Capture the tracer start/end events in debug mode
if evm.vmConfig.Debug && evm.depth == 0 { if evm.vmConfig.Debug && evm.depth == 0 {
evm.vmConfig.Tracer.CaptureStart(caller.Address(), addr, false, input, gas, value) evm.vmConfig.Tracer.CaptureStart(evm, caller.Address(), addr, false, input, gas, value)
defer func(startGas uint64, startTime time.Time) { // Lazy evaluation of the parameters defer func(startGas uint64, startTime time.Time) { // Lazy evaluation of the parameters
evm.vmConfig.Tracer.CaptureEnd(ret, startGas-gas, time.Since(startTime), err) evm.vmConfig.Tracer.CaptureEnd(ret, startGas-gas, time.Since(startTime), err)
}(gas, time.Now()) }(gas, time.Now())
@ -472,7 +472,7 @@ func (evm *EVM) create(caller ContractRef, codeAndHash *codeAndHash, gas uint64,
} }
if evm.vmConfig.Debug && evm.depth == 0 { if evm.vmConfig.Debug && evm.depth == 0 {
evm.vmConfig.Tracer.CaptureStart(caller.Address(), address, true, codeAndHash.code, gas, value) evm.vmConfig.Tracer.CaptureStart(evm, caller.Address(), address, true, codeAndHash.code, gas, value)
} }
start := time.Now() start := time.Now()

424
core/vm/instructions.go
Unescape View File

@ -24,68 +24,68 @@ import (
"golang.org/x/crypto/sha3" "golang.org/x/crypto/sha3"
) )
func opAdd(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opAdd(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Add(&x, y) y.Add(&x, y)
return nil, nil return nil, nil
} }
func opSub(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSub(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Sub(&x, y) y.Sub(&x, y)
return nil, nil return nil, nil
} }
func opMul(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMul(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Mul(&x, y) y.Mul(&x, y)
return nil, nil return nil, nil
} }
func opDiv(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opDiv(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Div(&x, y) y.Div(&x, y)
return nil, nil return nil, nil
} }
func opSdiv(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSdiv(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.SDiv(&x, y) y.SDiv(&x, y)
return nil, nil return nil, nil
} }
func opMod(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Mod(&x, y) y.Mod(&x, y)
return nil, nil return nil, nil
} }
func opSmod(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSmod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.SMod(&x, y) y.SMod(&x, y)
return nil, nil return nil, nil
} }
func opExp(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opExp(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
base, exponent := callContext.stack.pop(), callContext.stack.peek() base, exponent := scope.Stack.pop(), scope.Stack.peek()
exponent.Exp(&base, exponent) exponent.Exp(&base, exponent)
return nil, nil return nil, nil
} }
func opSignExtend(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSignExtend(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
back, num := callContext.stack.pop(), callContext.stack.peek() back, num := scope.Stack.pop(), scope.Stack.peek()
num.ExtendSign(num, &back) num.ExtendSign(num, &back)
return nil, nil return nil, nil
} }
func opNot(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opNot(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x := callContext.stack.peek() x := scope.Stack.peek()
x.Not(x) x.Not(x)
return nil, nil return nil, nil
} }
func opLt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opLt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Lt(y) { if x.Lt(y) {
y.SetOne() y.SetOne()
} else { } else {
@ -94,8 +94,8 @@ func opLt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte
return nil, nil return nil, nil
} }
func opGt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opGt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Gt(y) { if x.Gt(y) {
y.SetOne() y.SetOne()
} else { } else {
@ -104,8 +104,8 @@ func opGt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte
return nil, nil return nil, nil
} }
func opSlt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSlt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Slt(y) { if x.Slt(y) {
y.SetOne() y.SetOne()
} else { } else {
@ -114,8 +114,8 @@ func opSlt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byt
return nil, nil return nil, nil
} }
func opSgt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSgt(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Sgt(y) { if x.Sgt(y) {
y.SetOne() y.SetOne()
} else { } else {
@ -124,8 +124,8 @@ func opSgt(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byt
return nil, nil return nil, nil
} }
func opEq(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opEq(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
if x.Eq(y) { if x.Eq(y) {
y.SetOne() y.SetOne()
} else { } else {
@ -134,8 +134,8 @@ func opEq(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte
return nil, nil return nil, nil
} }
func opIszero(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opIszero(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x := callContext.stack.peek() x := scope.Stack.peek()
if x.IsZero() { if x.IsZero() {
x.SetOne() x.SetOne()
} else { } else {
@ -144,32 +144,32 @@ func opIszero(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
return nil, nil return nil, nil
} }
func opAnd(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opAnd(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.And(&x, y) y.And(&x, y)
return nil, nil return nil, nil
} }
func opOr(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opOr(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Or(&x, y) y.Or(&x, y)
return nil, nil return nil, nil
} }
func opXor(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opXor(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y := callContext.stack.pop(), callContext.stack.peek() x, y := scope.Stack.pop(), scope.Stack.peek()
y.Xor(&x, y) y.Xor(&x, y)
return nil, nil return nil, nil
} }
func opByte(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opByte(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
th, val := callContext.stack.pop(), callContext.stack.peek() th, val := scope.Stack.pop(), scope.Stack.peek()
val.Byte(&th) val.Byte(&th)
return nil, nil return nil, nil
} }
func opAddmod(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opAddmod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y, z := callContext.stack.pop(), callContext.stack.pop(), callContext.stack.peek() x, y, z := scope.Stack.pop(), scope.Stack.pop(), scope.Stack.peek()
if z.IsZero() { if z.IsZero() {
z.Clear() z.Clear()
} else { } else {
@ -178,8 +178,8 @@ func opAddmod(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
return nil, nil return nil, nil
} }
func opMulmod(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMulmod(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x, y, z := callContext.stack.pop(), callContext.stack.pop(), callContext.stack.peek() x, y, z := scope.Stack.pop(), scope.Stack.pop(), scope.Stack.peek()
z.MulMod(&x, &y, z) z.MulMod(&x, &y, z)
return nil, nil return nil, nil
} }
@ -187,9 +187,9 @@ func opMulmod(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
// opSHL implements Shift Left // opSHL implements Shift Left
// The SHL instruction (shift left) pops 2 values from the stack, first arg1 and then arg2, // The SHL instruction (shift left) pops 2 values from the stack, first arg1 and then arg2,
// and pushes on the stack arg2 shifted to the left by arg1 number of bits. // and pushes on the stack arg2 shifted to the left by arg1 number of bits.
func opSHL(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSHL(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards // Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards
shift, value := callContext.stack.pop(), callContext.stack.peek() shift, value := scope.Stack.pop(), scope.Stack.peek()
if shift.LtUint64(256) { if shift.LtUint64(256) {
value.Lsh(value, uint(shift.Uint64())) value.Lsh(value, uint(shift.Uint64()))
} else { } else {
@ -201,9 +201,9 @@ func opSHL(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byt
// opSHR implements Logical Shift Right // opSHR implements Logical Shift Right
// The SHR instruction (logical shift right) pops 2 values from the stack, first arg1 and then arg2, // The SHR instruction (logical shift right) pops 2 values from the stack, first arg1 and then arg2,
// and pushes on the stack arg2 shifted to the right by arg1 number of bits with zero fill. // and pushes on the stack arg2 shifted to the right by arg1 number of bits with zero fill.
func opSHR(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSHR(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards // Note, second operand is left in the stack; accumulate result into it, and no need to push it afterwards
shift, value := callContext.stack.pop(), callContext.stack.peek() shift, value := scope.Stack.pop(), scope.Stack.peek()
if shift.LtUint64(256) { if shift.LtUint64(256) {
value.Rsh(value, uint(shift.Uint64())) value.Rsh(value, uint(shift.Uint64()))
} else { } else {
@ -215,8 +215,8 @@ func opSHR(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byt
// opSAR implements Arithmetic Shift Right // opSAR implements Arithmetic Shift Right
// The SAR instruction (arithmetic shift right) pops 2 values from the stack, first arg1 and then arg2, // The SAR instruction (arithmetic shift right) pops 2 values from the stack, first arg1 and then arg2,
// and pushes on the stack arg2 shifted to the right by arg1 number of bits with sign extension. // and pushes on the stack arg2 shifted to the right by arg1 number of bits with sign extension.
func opSAR(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSAR(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
shift, value := callContext.stack.pop(), callContext.stack.peek() shift, value := scope.Stack.pop(), scope.Stack.peek()
if shift.GtUint64(256) { if shift.GtUint64(256) {
if value.Sign() >= 0 { if value.Sign() >= 0 {
value.Clear() value.Clear()
@ -231,9 +231,9 @@ func opSAR(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byt
return nil, nil return nil, nil
} }
func opSha3(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSha3(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
offset, size := callContext.stack.pop(), callContext.stack.peek() offset, size := scope.Stack.pop(), scope.Stack.peek()
data := callContext.memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64())) data := scope.Memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
if interpreter.hasher == nil { if interpreter.hasher == nil {
interpreter.hasher = sha3.NewLegacyKeccak256().(keccakState) interpreter.hasher = sha3.NewLegacyKeccak256().(keccakState)
@ -251,37 +251,37 @@ func opSha3(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]by
size.SetBytes(interpreter.hasherBuf[:]) size.SetBytes(interpreter.hasherBuf[:])
return nil, nil return nil, nil
} }
func opAddress(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opAddress(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetBytes(callContext.contract.Address().Bytes())) scope.Stack.push(new(uint256.Int).SetBytes(scope.Contract.Address().Bytes()))
return nil, nil return nil, nil
} }
func opBalance(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opBalance(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
slot := callContext.stack.peek() slot := scope.Stack.peek()
address := common.Address(slot.Bytes20()) address := common.Address(slot.Bytes20())
slot.SetFromBig(interpreter.evm.StateDB.GetBalance(address)) slot.SetFromBig(interpreter.evm.StateDB.GetBalance(address))
return nil, nil return nil, nil
} }
func opOrigin(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opOrigin(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetBytes(interpreter.evm.Origin.Bytes())) scope.Stack.push(new(uint256.Int).SetBytes(interpreter.evm.Origin.Bytes()))
return nil, nil return nil, nil
} }
func opCaller(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCaller(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetBytes(callContext.contract.Caller().Bytes())) scope.Stack.push(new(uint256.Int).SetBytes(scope.Contract.Caller().Bytes()))
return nil, nil return nil, nil
} }
func opCallValue(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCallValue(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(callContext.contract.value) v, _ := uint256.FromBig(scope.Contract.value)
callContext.stack.push(v) scope.Stack.push(v)
return nil, nil return nil, nil
} }
func opCallDataLoad(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCallDataLoad(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
x := callContext.stack.peek() x := scope.Stack.peek()
if offset, overflow := x.Uint64WithOverflow(); !overflow { if offset, overflow := x.Uint64WithOverflow(); !overflow {
data := getData(callContext.contract.Input, offset, 32) data := getData(scope.Contract.Input, offset, 32)
x.SetBytes(data) x.SetBytes(data)
} else { } else {
x.Clear() x.Clear()
@ -289,16 +289,16 @@ func opCallDataLoad(pc *uint64, interpreter *EVMInterpreter, callContext *callCt
return nil, nil return nil, nil
} }
func opCallDataSize(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCallDataSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetUint64(uint64(len(callContext.contract.Input)))) scope.Stack.push(new(uint256.Int).SetUint64(uint64(len(scope.Contract.Input))))
return nil, nil return nil, nil
} }
func opCallDataCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCallDataCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
memOffset = callContext.stack.pop() memOffset = scope.Stack.pop()
dataOffset = callContext.stack.pop() dataOffset = scope.Stack.pop()
length = callContext.stack.pop() length = scope.Stack.pop()
) )
dataOffset64, overflow := dataOffset.Uint64WithOverflow() dataOffset64, overflow := dataOffset.Uint64WithOverflow()
if overflow { if overflow {
@ -307,21 +307,21 @@ func opCallDataCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCt
// These values are checked for overflow during gas cost calculation // These values are checked for overflow during gas cost calculation
memOffset64 := memOffset.Uint64() memOffset64 := memOffset.Uint64()
length64 := length.Uint64() length64 := length.Uint64()
callContext.memory.Set(memOffset64, length64, getData(callContext.contract.Input, dataOffset64, length64)) scope.Memory.Set(memOffset64, length64, getData(scope.Contract.Input, dataOffset64, length64))
return nil, nil return nil, nil
} }
func opReturnDataSize(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opReturnDataSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetUint64(uint64(len(interpreter.returnData)))) scope.Stack.push(new(uint256.Int).SetUint64(uint64(len(interpreter.returnData))))
return nil, nil return nil, nil
} }
func opReturnDataCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opReturnDataCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
memOffset = callContext.stack.pop() memOffset = scope.Stack.pop()
dataOffset = callContext.stack.pop() dataOffset = scope.Stack.pop()
length = callContext.stack.pop() length = scope.Stack.pop()
) )
offset64, overflow := dataOffset.Uint64WithOverflow() offset64, overflow := dataOffset.Uint64WithOverflow()
@ -335,42 +335,42 @@ func opReturnDataCopy(pc *uint64, interpreter *EVMInterpreter, callContext *call
if overflow || uint64(len(interpreter.returnData)) < end64 { if overflow || uint64(len(interpreter.returnData)) < end64 {
return nil, ErrReturnDataOutOfBounds return nil, ErrReturnDataOutOfBounds
} }
callContext.memory.Set(memOffset.Uint64(), length.Uint64(), interpreter.returnData[offset64:end64]) scope.Memory.Set(memOffset.Uint64(), length.Uint64(), interpreter.returnData[offset64:end64])
return nil, nil return nil, nil
} }
func opExtCodeSize(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opExtCodeSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
slot := callContext.stack.peek() slot := scope.Stack.peek()
slot.SetUint64(uint64(interpreter.evm.StateDB.GetCodeSize(slot.Bytes20()))) slot.SetUint64(uint64(interpreter.evm.StateDB.GetCodeSize(slot.Bytes20())))
return nil, nil return nil, nil
} }
func opCodeSize(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCodeSize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
l := new(uint256.Int) l := new(uint256.Int)
l.SetUint64(uint64(len(callContext.contract.Code))) l.SetUint64(uint64(len(scope.Contract.Code)))
callContext.stack.push(l) scope.Stack.push(l)
return nil, nil return nil, nil
} }
func opCodeCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCodeCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
memOffset = callContext.stack.pop() memOffset = scope.Stack.pop()
codeOffset = callContext.stack.pop() codeOffset = scope.Stack.pop()
length = callContext.stack.pop() length = scope.Stack.pop()
) )
uint64CodeOffset, overflow := codeOffset.Uint64WithOverflow() uint64CodeOffset, overflow := codeOffset.Uint64WithOverflow()
if overflow { if overflow {
uint64CodeOffset = 0xffffffffffffffff uint64CodeOffset = 0xffffffffffffffff
} }
codeCopy := getData(callContext.contract.Code, uint64CodeOffset, length.Uint64()) codeCopy := getData(scope.Contract.Code, uint64CodeOffset, length.Uint64())
callContext.memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy) scope.Memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy)
return nil, nil return nil, nil
} }
func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
stack = callContext.stack stack = scope.Stack
a = stack.pop() a = stack.pop()
memOffset = stack.pop() memOffset = stack.pop()
codeOffset = stack.pop() codeOffset = stack.pop()
@ -382,7 +382,7 @@ func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx
} }
addr := common.Address(a.Bytes20()) addr := common.Address(a.Bytes20())
codeCopy := getData(interpreter.evm.StateDB.GetCode(addr), uint64CodeOffset, length.Uint64()) codeCopy := getData(interpreter.evm.StateDB.GetCode(addr), uint64CodeOffset, length.Uint64())
callContext.memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy) scope.Memory.Set(memOffset.Uint64(), length.Uint64(), codeCopy)
return nil, nil return nil, nil
} }
@ -413,8 +413,8 @@ func opExtCodeCopy(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx
// //
// (6) Caller tries to get the code hash for an account which is marked as deleted, // (6) Caller tries to get the code hash for an account which is marked as deleted,
// this account should be regarded as a non-existent account and zero should be returned. // this account should be regarded as a non-existent account and zero should be returned.
func opExtCodeHash(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opExtCodeHash(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
slot := callContext.stack.peek() slot := scope.Stack.peek()
address := common.Address(slot.Bytes20()) address := common.Address(slot.Bytes20())
if interpreter.evm.StateDB.Empty(address) { if interpreter.evm.StateDB.Empty(address) {
slot.Clear() slot.Clear()
@ -424,14 +424,14 @@ func opExtCodeHash(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx
return nil, nil return nil, nil
} }
func opGasprice(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opGasprice(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(interpreter.evm.GasPrice) v, _ := uint256.FromBig(interpreter.evm.GasPrice)
callContext.stack.push(v) scope.Stack.push(v)
return nil, nil return nil, nil
} }
func opBlockhash(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opBlockhash(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
num := callContext.stack.peek() num := scope.Stack.peek()
num64, overflow := num.Uint64WithOverflow() num64, overflow := num.Uint64WithOverflow()
if overflow { if overflow {
num.Clear() num.Clear()
@ -452,88 +452,88 @@ func opBlockhash(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx)
return nil, nil return nil, nil
} }
func opCoinbase(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCoinbase(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetBytes(interpreter.evm.Context.Coinbase.Bytes())) scope.Stack.push(new(uint256.Int).SetBytes(interpreter.evm.Context.Coinbase.Bytes()))
return nil, nil return nil, nil
} }
func opTimestamp(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opTimestamp(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(interpreter.evm.Context.Time) v, _ := uint256.FromBig(interpreter.evm.Context.Time)
callContext.stack.push(v) scope.Stack.push(v)
return nil, nil return nil, nil
} }
func opNumber(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opNumber(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(interpreter.evm.Context.BlockNumber) v, _ := uint256.FromBig(interpreter.evm.Context.BlockNumber)
callContext.stack.push(v) scope.Stack.push(v)
return nil, nil return nil, nil
} }
func opDifficulty(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opDifficulty(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v, _ := uint256.FromBig(interpreter.evm.Context.Difficulty) v, _ := uint256.FromBig(interpreter.evm.Context.Difficulty)
callContext.stack.push(v) scope.Stack.push(v)
return nil, nil return nil, nil
} }
func opGasLimit(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opGasLimit(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetUint64(interpreter.evm.Context.GasLimit)) scope.Stack.push(new(uint256.Int).SetUint64(interpreter.evm.Context.GasLimit))
return nil, nil return nil, nil
} }
func opPop(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opPop(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.pop() scope.Stack.pop()
return nil, nil return nil, nil
} }
func opMload(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
v := callContext.stack.peek() v := scope.Stack.peek()
offset := int64(v.Uint64()) offset := int64(v.Uint64())
v.SetBytes(callContext.memory.GetPtr(offset, 32)) v.SetBytes(scope.Memory.GetPtr(offset, 32))
return nil, nil return nil, nil
} }
func opMstore(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// pop value of the stack // pop value of the stack
mStart, val := callContext.stack.pop(), callContext.stack.pop() mStart, val := scope.Stack.pop(), scope.Stack.pop()
callContext.memory.Set32(mStart.Uint64(), &val) scope.Memory.Set32(mStart.Uint64(), &val)
return nil, nil return nil, nil
} }
func opMstore8(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMstore8(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
off, val := callContext.stack.pop(), callContext.stack.pop() off, val := scope.Stack.pop(), scope.Stack.pop()
callContext.memory.store[off.Uint64()] = byte(val.Uint64()) scope.Memory.store[off.Uint64()] = byte(val.Uint64())
return nil, nil return nil, nil
} }
func opSload(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSload(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
loc := callContext.stack.peek() loc := scope.Stack.peek()
hash := common.Hash(loc.Bytes32()) hash := common.Hash(loc.Bytes32())
val := interpreter.evm.StateDB.GetState(callContext.contract.Address(), hash) val := interpreter.evm.StateDB.GetState(scope.Contract.Address(), hash)
loc.SetBytes(val.Bytes()) loc.SetBytes(val.Bytes())
return nil, nil return nil, nil
} }
func opSstore(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSstore(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
loc := callContext.stack.pop() loc := scope.Stack.pop()
val := callContext.stack.pop() val := scope.Stack.pop()
interpreter.evm.StateDB.SetState(callContext.contract.Address(), interpreter.evm.StateDB.SetState(scope.Contract.Address(),
loc.Bytes32(), val.Bytes32()) loc.Bytes32(), val.Bytes32())
return nil, nil return nil, nil
} }
func opJump(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opJump(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
pos := callContext.stack.pop() pos := scope.Stack.pop()
if !callContext.contract.validJumpdest(&pos) { if !scope.Contract.validJumpdest(&pos) {
return nil, ErrInvalidJump return nil, ErrInvalidJump
} }
*pc = pos.Uint64() *pc = pos.Uint64()
return nil, nil return nil, nil
} }
func opJumpi(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opJumpi(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
pos, cond := callContext.stack.pop(), callContext.stack.pop() pos, cond := scope.Stack.pop(), scope.Stack.pop()
if !cond.IsZero() { if !cond.IsZero() {
if !callContext.contract.validJumpdest(&pos) { if !scope.Contract.validJumpdest(&pos) {
return nil, ErrInvalidJump return nil, ErrInvalidJump
} }
*pc = pos.Uint64() *pc = pos.Uint64()
@ -543,31 +543,31 @@ func opJumpi(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]b
return nil, nil return nil, nil
} }
func opJumpdest(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opJumpdest(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
return nil, nil return nil, nil
} }
func opPc(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opPc(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetUint64(*pc)) scope.Stack.push(new(uint256.Int).SetUint64(*pc))
return nil, nil return nil, nil
} }
func opMsize(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opMsize(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetUint64(uint64(callContext.memory.Len()))) scope.Stack.push(new(uint256.Int).SetUint64(uint64(scope.Memory.Len())))
return nil, nil return nil, nil
} }
func opGas(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opGas(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.push(new(uint256.Int).SetUint64(callContext.contract.Gas)) scope.Stack.push(new(uint256.Int).SetUint64(scope.Contract.Gas))
return nil, nil return nil, nil
} }
func opCreate(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCreate(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
value = callContext.stack.pop() value = scope.Stack.pop()
offset, size = callContext.stack.pop(), callContext.stack.pop() offset, size = scope.Stack.pop(), scope.Stack.pop()
input = callContext.memory.GetCopy(int64(offset.Uint64()), int64(size.Uint64())) input = scope.Memory.GetCopy(int64(offset.Uint64()), int64(size.Uint64()))
gas = callContext.contract.Gas gas = scope.Contract.Gas
) )
if interpreter.evm.chainRules.IsEIP150 { if interpreter.evm.chainRules.IsEIP150 {
gas -= gas / 64 gas -= gas / 64
@ -575,14 +575,14 @@ func opCreate(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
// reuse size int for stackvalue // reuse size int for stackvalue
stackvalue := size stackvalue := size
callContext.contract.UseGas(gas) scope.Contract.UseGas(gas)
//TODO: use uint256.Int instead of converting with toBig() //TODO: use uint256.Int instead of converting with toBig()
var bigVal = big0 var bigVal = big0
if !value.IsZero() { if !value.IsZero() {
bigVal = value.ToBig() bigVal = value.ToBig()
} }
res, addr, returnGas, suberr := interpreter.evm.Create(callContext.contract, input, gas, bigVal) res, addr, returnGas, suberr := interpreter.evm.Create(scope.Contract, input, gas, bigVal)
// Push item on the stack based on the returned error. If the ruleset is // Push item on the stack based on the returned error. If the ruleset is
// homestead we must check for CodeStoreOutOfGasError (homestead only // homestead we must check for CodeStoreOutOfGasError (homestead only
// rule) and treat as an error, if the ruleset is frontier we must // rule) and treat as an error, if the ruleset is frontier we must
@ -594,8 +594,8 @@ func opCreate(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
} else { } else {
stackvalue.SetBytes(addr.Bytes()) stackvalue.SetBytes(addr.Bytes())
} }
callContext.stack.push(&stackvalue) scope.Stack.push(&stackvalue)
callContext.contract.Gas += returnGas scope.Contract.Gas += returnGas
if suberr == ErrExecutionReverted { if suberr == ErrExecutionReverted {
return res, nil return res, nil
@ -603,18 +603,18 @@ func opCreate(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]
return nil, nil return nil, nil
} }
func opCreate2(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCreate2(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
endowment = callContext.stack.pop() endowment = scope.Stack.pop()
offset, size = callContext.stack.pop(), callContext.stack.pop() offset, size = scope.Stack.pop(), scope.Stack.pop()
salt = callContext.stack.pop() salt = scope.Stack.pop()
input = callContext.memory.GetCopy(int64(offset.Uint64()), int64(size.Uint64())) input = scope.Memory.GetCopy(int64(offset.Uint64()), int64(size.Uint64()))
gas = callContext.contract.Gas gas = scope.Contract.Gas
) )
// Apply EIP150 // Apply EIP150
gas -= gas / 64 gas -= gas / 64
callContext.contract.UseGas(gas) scope.Contract.UseGas(gas)
// reuse size int for stackvalue // reuse size int for stackvalue
stackvalue := size stackvalue := size
//TODO: use uint256.Int instead of converting with toBig() //TODO: use uint256.Int instead of converting with toBig()
@ -622,7 +622,7 @@ func opCreate2(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([
if !endowment.IsZero() { if !endowment.IsZero() {
bigEndowment = endowment.ToBig() bigEndowment = endowment.ToBig()
} }
res, addr, returnGas, suberr := interpreter.evm.Create2(callContext.contract, input, gas, res, addr, returnGas, suberr := interpreter.evm.Create2(scope.Contract, input, gas,
bigEndowment, &salt) bigEndowment, &salt)
// Push item on the stack based on the returned error. // Push item on the stack based on the returned error.
if suberr != nil { if suberr != nil {
@ -630,8 +630,8 @@ func opCreate2(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([
} else { } else {
stackvalue.SetBytes(addr.Bytes()) stackvalue.SetBytes(addr.Bytes())
} }
callContext.stack.push(&stackvalue) scope.Stack.push(&stackvalue)
callContext.contract.Gas += returnGas scope.Contract.Gas += returnGas
if suberr == ErrExecutionReverted { if suberr == ErrExecutionReverted {
return res, nil return res, nil
@ -639,8 +639,8 @@ func opCreate2(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([
return nil, nil return nil, nil
} }
func opCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCall(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
stack := callContext.stack stack := scope.Stack
// Pop gas. The actual gas in interpreter.evm.callGasTemp. // Pop gas. The actual gas in interpreter.evm.callGasTemp.
// We can use this as a temporary value // We can use this as a temporary value
temp := stack.pop() temp := stack.pop()
@ -649,7 +649,7 @@ func opCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]by
addr, value, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop() addr, value, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop()
toAddr := common.Address(addr.Bytes20()) toAddr := common.Address(addr.Bytes20())
// Get the arguments from the memory. // Get the arguments from the memory.
args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64())) args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
var bigVal = big0 var bigVal = big0
//TODO: use uint256.Int instead of converting with toBig() //TODO: use uint256.Int instead of converting with toBig()
@ -660,7 +660,7 @@ func opCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]by
bigVal = value.ToBig() bigVal = value.ToBig()
} }
ret, returnGas, err := interpreter.evm.Call(callContext.contract, toAddr, args, gas, bigVal) ret, returnGas, err := interpreter.evm.Call(scope.Contract, toAddr, args, gas, bigVal)
if err != nil { if err != nil {
temp.Clear() temp.Clear()
@ -669,16 +669,16 @@ func opCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]by
} }
stack.push(&temp) stack.push(&temp)
if err == nil || err == ErrExecutionReverted { if err == nil || err == ErrExecutionReverted {
callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret) scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
} }
callContext.contract.Gas += returnGas scope.Contract.Gas += returnGas
return ret, nil return ret, nil
} }
func opCallCode(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opCallCode(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// Pop gas. The actual gas is in interpreter.evm.callGasTemp. // Pop gas. The actual gas is in interpreter.evm.callGasTemp.
stack := callContext.stack stack := scope.Stack
// We use it as a temporary value // We use it as a temporary value
temp := stack.pop() temp := stack.pop()
gas := interpreter.evm.callGasTemp gas := interpreter.evm.callGasTemp
@ -686,7 +686,7 @@ func opCallCode(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) (
addr, value, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop() addr, value, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop()
toAddr := common.Address(addr.Bytes20()) toAddr := common.Address(addr.Bytes20())
// Get arguments from the memory. // Get arguments from the memory.
args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64())) args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
//TODO: use uint256.Int instead of converting with toBig() //TODO: use uint256.Int instead of converting with toBig()
var bigVal = big0 var bigVal = big0
@ -695,7 +695,7 @@ func opCallCode(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) (
bigVal = value.ToBig() bigVal = value.ToBig()
} }
ret, returnGas, err := interpreter.evm.CallCode(callContext.contract, toAddr, args, gas, bigVal) ret, returnGas, err := interpreter.evm.CallCode(scope.Contract, toAddr, args, gas, bigVal)
if err != nil { if err != nil {
temp.Clear() temp.Clear()
} else { } else {
@ -703,15 +703,15 @@ func opCallCode(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) (
} }
stack.push(&temp) stack.push(&temp)
if err == nil || err == ErrExecutionReverted { if err == nil || err == ErrExecutionReverted {
callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret) scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
} }
callContext.contract.Gas += returnGas scope.Contract.Gas += returnGas
return ret, nil return ret, nil
} }
func opDelegateCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opDelegateCall(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
stack := callContext.stack stack := scope.Stack
// Pop gas. The actual gas is in interpreter.evm.callGasTemp. // Pop gas. The actual gas is in interpreter.evm.callGasTemp.
// We use it as a temporary value // We use it as a temporary value
temp := stack.pop() temp := stack.pop()
@ -720,9 +720,9 @@ func opDelegateCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCt
addr, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop() addr, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop()
toAddr := common.Address(addr.Bytes20()) toAddr := common.Address(addr.Bytes20())
// Get arguments from the memory. // Get arguments from the memory.
args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64())) args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
ret, returnGas, err := interpreter.evm.DelegateCall(callContext.contract, toAddr, args, gas) ret, returnGas, err := interpreter.evm.DelegateCall(scope.Contract, toAddr, args, gas)
if err != nil { if err != nil {
temp.Clear() temp.Clear()
} else { } else {
@ -730,16 +730,16 @@ func opDelegateCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCt
} }
stack.push(&temp) stack.push(&temp)
if err == nil || err == ErrExecutionReverted { if err == nil || err == ErrExecutionReverted {
callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret) scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
} }
callContext.contract.Gas += returnGas scope.Contract.Gas += returnGas
return ret, nil return ret, nil
} }
func opStaticCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opStaticCall(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
// Pop gas. The actual gas is in interpreter.evm.callGasTemp. // Pop gas. The actual gas is in interpreter.evm.callGasTemp.
stack := callContext.stack stack := scope.Stack
// We use it as a temporary value // We use it as a temporary value
temp := stack.pop() temp := stack.pop()
gas := interpreter.evm.callGasTemp gas := interpreter.evm.callGasTemp
@ -747,9 +747,9 @@ func opStaticCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx)
addr, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop() addr, inOffset, inSize, retOffset, retSize := stack.pop(), stack.pop(), stack.pop(), stack.pop(), stack.pop()
toAddr := common.Address(addr.Bytes20()) toAddr := common.Address(addr.Bytes20())
// Get arguments from the memory. // Get arguments from the memory.
args := callContext.memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64())) args := scope.Memory.GetPtr(int64(inOffset.Uint64()), int64(inSize.Uint64()))
ret, returnGas, err := interpreter.evm.StaticCall(callContext.contract, toAddr, args, gas) ret, returnGas, err := interpreter.evm.StaticCall(scope.Contract, toAddr, args, gas)
if err != nil { if err != nil {
temp.Clear() temp.Clear()
} else { } else {
@ -757,36 +757,36 @@ func opStaticCall(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx)
} }
stack.push(&temp) stack.push(&temp)
if err == nil || err == ErrExecutionReverted { if err == nil || err == ErrExecutionReverted {
callContext.memory.Set(retOffset.Uint64(), retSize.Uint64(), ret) scope.Memory.Set(retOffset.Uint64(), retSize.Uint64(), ret)
} }
callContext.contract.Gas += returnGas scope.Contract.Gas += returnGas
return ret, nil return ret, nil
} }
func opReturn(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opReturn(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
offset, size := callContext.stack.pop(), callContext.stack.pop() offset, size := scope.Stack.pop(), scope.Stack.pop()
ret := callContext.memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64())) ret := scope.Memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
return ret, nil return ret, nil
} }
func opRevert(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opRevert(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
offset, size := callContext.stack.pop(), callContext.stack.pop() offset, size := scope.Stack.pop(), scope.Stack.pop()
ret := callContext.memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64())) ret := scope.Memory.GetPtr(int64(offset.Uint64()), int64(size.Uint64()))
return ret, nil return ret, nil
} }
func opStop(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opStop(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
return nil, nil return nil, nil
} }
func opSuicide(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opSuicide(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
beneficiary := callContext.stack.pop() beneficiary := scope.Stack.pop()
balance := interpreter.evm.StateDB.GetBalance(callContext.contract.Address()) balance := interpreter.evm.StateDB.GetBalance(scope.Contract.Address())
interpreter.evm.StateDB.AddBalance(beneficiary.Bytes20(), balance) interpreter.evm.StateDB.AddBalance(beneficiary.Bytes20(), balance)
interpreter.evm.StateDB.Suicide(callContext.contract.Address()) interpreter.evm.StateDB.Suicide(scope.Contract.Address())
return nil, nil return nil, nil
} }
@ -794,18 +794,18 @@ func opSuicide(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([
// make log instruction function // make log instruction function
func makeLog(size int) executionFunc { func makeLog(size int) executionFunc {
return func(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
topics := make([]common.Hash, size) topics := make([]common.Hash, size)
stack := callContext.stack stack := scope.Stack
mStart, mSize := stack.pop(), stack.pop() mStart, mSize := stack.pop(), stack.pop()
for i := 0; i < size; i++ { for i := 0; i < size; i++ {
addr := stack.pop() addr := stack.pop()
topics[i] = addr.Bytes32() topics[i] = addr.Bytes32()
} }
d := callContext.memory.GetCopy(int64(mStart.Uint64()), int64(mSize.Uint64())) d := scope.Memory.GetCopy(int64(mStart.Uint64()), int64(mSize.Uint64()))
interpreter.evm.StateDB.AddLog(&types.Log{ interpreter.evm.StateDB.AddLog(&types.Log{
Address: callContext.contract.Address(), Address: scope.Contract.Address(),
Topics: topics, Topics: topics,
Data: d, Data: d,
// This is a non-consensus field, but assigned here because // This is a non-consensus field, but assigned here because
@ -818,24 +818,24 @@ func makeLog(size int) executionFunc {
} }
// opPush1 is a specialized version of pushN // opPush1 is a specialized version of pushN
func opPush1(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { func opPush1(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
var ( var (
codeLen = uint64(len(callContext.contract.Code)) codeLen = uint64(len(scope.Contract.Code))
integer = new(uint256.Int) integer = new(uint256.Int)
) )
*pc += 1 *pc += 1
if *pc < codeLen { if *pc < codeLen {
callContext.stack.push(integer.SetUint64(uint64(callContext.contract.Code[*pc]))) scope.Stack.push(integer.SetUint64(uint64(scope.Contract.Code[*pc])))
} else { } else {
callContext.stack.push(integer.Clear()) scope.Stack.push(integer.Clear())
} }
return nil, nil return nil, nil
} }
// make push instruction function // make push instruction function
func makePush(size uint64, pushByteSize int) executionFunc { func makePush(size uint64, pushByteSize int) executionFunc {
return func(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
codeLen := len(callContext.contract.Code) codeLen := len(scope.Contract.Code)
startMin := codeLen startMin := codeLen
if int(*pc+1) < startMin { if int(*pc+1) < startMin {
@ -848,8 +848,8 @@ func makePush(size uint64, pushByteSize int) executionFunc {
} }
integer := new(uint256.Int) integer := new(uint256.Int)
callContext.stack.push(integer.SetBytes(common.RightPadBytes( scope.Stack.push(integer.SetBytes(common.RightPadBytes(
callContext.contract.Code[startMin:endMin], pushByteSize))) scope.Contract.Code[startMin:endMin], pushByteSize)))
*pc += size *pc += size
return nil, nil return nil, nil
@ -858,8 +858,8 @@ func makePush(size uint64, pushByteSize int) executionFunc {
// make dup instruction function // make dup instruction function
func makeDup(size int64) executionFunc { func makeDup(size int64) executionFunc {
return func(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.dup(int(size)) scope.Stack.dup(int(size))
return nil, nil return nil, nil
} }
} }
@ -868,8 +868,8 @@ func makeDup(size int64) executionFunc {
func makeSwap(size int64) executionFunc { func makeSwap(size int64) executionFunc {
// switch n + 1 otherwise n would be swapped with n // switch n + 1 otherwise n would be swapped with n
size++ size++
return func(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) { return func(pc *uint64, interpreter *EVMInterpreter, scope *ScopeContext) ([]byte, error) {
callContext.stack.swap(int(size)) scope.Stack.swap(int(size))
return nil, nil return nil, nil
} }
} }

16
core/vm/instructions_test.go
Unescape View File

@ -104,7 +104,7 @@ func testTwoOperandOp(t *testing.T, tests []TwoOperandTestcase, opFn executionFu
expected := new(uint256.Int).SetBytes(common.Hex2Bytes(test.Expected)) expected := new(uint256.Int).SetBytes(common.Hex2Bytes(test.Expected))
stack.push(x) stack.push(x)
stack.push(y) stack.push(y)
opFn(&pc, evmInterpreter, &callCtx{nil, stack, nil}) opFn(&pc, evmInterpreter, &ScopeContext{nil, stack, nil})
if len(stack.data) != 1 { if len(stack.data) != 1 {
t.Errorf("Expected one item on stack after %v, got %d: ", name, len(stack.data)) t.Errorf("Expected one item on stack after %v, got %d: ", name, len(stack.data))
} }
@ -219,7 +219,7 @@ func TestAddMod(t *testing.T) {
stack.push(z) stack.push(z)
stack.push(y) stack.push(y)
stack.push(x) stack.push(x)
opAddmod(&pc, evmInterpreter, &callCtx{nil, stack, nil}) opAddmod(&pc, evmInterpreter, &ScopeContext{nil, stack, nil})
actual := stack.pop() actual := stack.pop()
if actual.Cmp(expected) != 0 { if actual.Cmp(expected) != 0 {
t.Errorf("Testcase %d, expected %x, got %x", i, expected, actual) t.Errorf("Testcase %d, expected %x, got %x", i, expected, actual)
@ -241,7 +241,7 @@ func getResult(args []*twoOperandParams, opFn executionFunc) []TwoOperandTestcas
y := new(uint256.Int).SetBytes(common.Hex2Bytes(param.y)) y := new(uint256.Int).SetBytes(common.Hex2Bytes(param.y))
stack.push(x) stack.push(x)
stack.push(y) stack.push(y)
opFn(&pc, interpreter, &callCtx{nil, stack, nil}) opFn(&pc, interpreter, &ScopeContext{nil, stack, nil})
actual := stack.pop() actual := stack.pop()
result[i] = TwoOperandTestcase{param.x, param.y, fmt.Sprintf("%064x", actual)} result[i] = TwoOperandTestcase{param.x, param.y, fmt.Sprintf("%064x", actual)}
} }
@ -299,7 +299,7 @@ func opBenchmark(bench *testing.B, op executionFunc, args ...string) {
a.SetBytes(arg) a.SetBytes(arg)
stack.push(a) stack.push(a)
} }
op(&pc, evmInterpreter, &callCtx{nil, stack, nil}) op(&pc, evmInterpreter, &ScopeContext{nil, stack, nil})
stack.pop() stack.pop()
} }
} }
@ -525,12 +525,12 @@ func TestOpMstore(t *testing.T) {
pc := uint64(0) pc := uint64(0)
v := "abcdef00000000000000abba000000000deaf000000c0de00100000000133700" v := "abcdef00000000000000abba000000000deaf000000c0de00100000000133700"
stack.pushN(*new(uint256.Int).SetBytes(common.Hex2Bytes(v)), *new(uint256.Int)) stack.pushN(*new(uint256.Int).SetBytes(common.Hex2Bytes(v)), *new(uint256.Int))
opMstore(&pc, evmInterpreter, &callCtx{mem, stack, nil}) opMstore(&pc, evmInterpreter, &ScopeContext{mem, stack, nil})
if got := common.Bytes2Hex(mem.GetCopy(0, 32)); got != v { if got := common.Bytes2Hex(mem.GetCopy(0, 32)); got != v {
t.Fatalf("Mstore fail, got %v, expected %v", got, v) t.Fatalf("Mstore fail, got %v, expected %v", got, v)
} }
stack.pushN(*new(uint256.Int).SetUint64(0x1), *new(uint256.Int)) stack.pushN(*new(uint256.Int).SetUint64(0x1), *new(uint256.Int))
opMstore(&pc, evmInterpreter, &callCtx{mem, stack, nil}) opMstore(&pc, evmInterpreter, &ScopeContext{mem, stack, nil})
if common.Bytes2Hex(mem.GetCopy(0, 32)) != "0000000000000000000000000000000000000000000000000000000000000001" { if common.Bytes2Hex(mem.GetCopy(0, 32)) != "0000000000000000000000000000000000000000000000000000000000000001" {
t.Fatalf("Mstore failed to overwrite previous value") t.Fatalf("Mstore failed to overwrite previous value")
} }
@ -553,7 +553,7 @@ func BenchmarkOpMstore(bench *testing.B) {
bench.ResetTimer() bench.ResetTimer()
for i := 0; i < bench.N; i++ { for i := 0; i < bench.N; i++ {
stack.pushN(*value, *memStart) stack.pushN(*value, *memStart)
opMstore(&pc, evmInterpreter, &callCtx{mem, stack, nil}) opMstore(&pc, evmInterpreter, &ScopeContext{mem, stack, nil})
} }
} }
@ -572,7 +572,7 @@ func BenchmarkOpSHA3(bench *testing.B) {
bench.ResetTimer() bench.ResetTimer()
for i := 0; i < bench.N; i++ { for i := 0; i < bench.N; i++ {
stack.pushN(*uint256.NewInt().SetUint64(32), *start) stack.pushN(*uint256.NewInt().SetUint64(32), *start)
opSha3(&pc, evmInterpreter, &callCtx{mem, stack, nil}) opSha3(&pc, evmInterpreter, &ScopeContext{mem, stack, nil})
} }
} }

24
core/vm/interpreter.go
Unescape View File

@ -62,12 +62,12 @@ type Interpreter interface {
CanRun([]byte) bool CanRun([]byte) bool
} }
// callCtx contains the things that are per-call, such as stack and memory, // ScopeContext contains the things that are per-call, such as stack and memory,
// but not transients like pc and gas // but not transients like pc and gas
type callCtx struct { type ScopeContext struct {
memory *Memory Memory *Memory
stack *Stack Stack *Stack
contract *Contract Contract *Contract
} }
// keccakState wraps sha3.state. In addition to the usual hash methods, it also supports // keccakState wraps sha3.state. In addition to the usual hash methods, it also supports
@ -163,10 +163,10 @@ func (in *EVMInterpreter) Run(contract *Contract, input []byte, readOnly bool) (
op OpCode // current opcode op OpCode // current opcode
mem = NewMemory() // bound memory mem = NewMemory() // bound memory
stack = newstack() // local stack stack = newstack() // local stack
callContext = &callCtx{ callContext = &ScopeContext{
memory: mem, Memory: mem,
stack: stack, Stack: stack,
contract: contract, Contract: contract,
} }
// For optimisation reason we're using uint64 as the program counter. // For optimisation reason we're using uint64 as the program counter.
// It's theoretically possible to go above 2^64. The YP defines the PC // It's theoretically possible to go above 2^64. The YP defines the PC
@ -191,9 +191,9 @@ func (in *EVMInterpreter) Run(contract *Contract, input []byte, readOnly bool) (
defer func() { defer func() {
if err != nil { if err != nil {
if !logged { if !logged {
in.cfg.Tracer.CaptureState(in.evm, pcCopy, op, gasCopy, cost, mem, stack, in.returnData, contract, in.evm.depth, err) in.cfg.Tracer.CaptureState(in.evm, pcCopy, op, gasCopy, cost, callContext, in.returnData, in.evm.depth, err)
} else { } else {
in.cfg.Tracer.CaptureFault(in.evm, pcCopy, op, gasCopy, cost, mem, stack, contract, in.evm.depth, err) in.cfg.Tracer.CaptureFault(in.evm, pcCopy, op, gasCopy, cost, callContext, in.evm.depth, err)
} }
} }
}() }()
@ -275,7 +275,7 @@ func (in *EVMInterpreter) Run(contract *Contract, input []byte, readOnly bool) (
} }
if in.cfg.Debug { if in.cfg.Debug {
in.cfg.Tracer.CaptureState(in.evm, pc, op, gasCopy, cost, mem, stack, in.returnData, contract, in.evm.depth, err) in.cfg.Tracer.CaptureState(in.evm, pc, op, gasCopy, cost, callContext, in.returnData, in.evm.depth, err)
logged = true logged = true
} }

2
core/vm/jump_table.go
Unescape View File

@ -21,7 +21,7 @@ import (
) )
type ( type (
executionFunc func(pc *uint64, interpreter *EVMInterpreter, callContext *callCtx) ([]byte, error) executionFunc func(pc *uint64, interpreter *EVMInterpreter, callContext *ScopeContext) ([]byte, error)
gasFunc func(*EVM, *Contract, *Stack, *Memory, uint64) (uint64, error) // last parameter is the requested memory size as a uint64 gasFunc func(*EVM, *Contract, *Stack, *Memory, uint64) (uint64, error) // last parameter is the requested memory size as a uint64
// memorySizeFunc returns the required size, and whether the operation overflowed a uint64 // memorySizeFunc returns the required size, and whether the operation overflowed a uint64
memorySizeFunc func(*Stack) (size uint64, overflow bool) memorySizeFunc func(*Stack) (size uint64, overflow bool)

44
core/vm/logger.go
Unescape View File

@ -18,7 +18,6 @@ package vm
import ( import (
"encoding/hex" "encoding/hex"
"errors"
"fmt" "fmt"
"io" "io"
"math/big" "math/big"
@ -32,8 +31,6 @@ import (
"github.com/ethereum/go-ethereum/params" "github.com/ethereum/go-ethereum/params"
) )
var errTraceLimitReached = errors.New("the number of logs reached the specified limit")
// Storage represents a contract's storage. // Storage represents a contract's storage.
type Storage map[common.Hash]common.Hash type Storage map[common.Hash]common.Hash
@ -107,10 +104,10 @@ func (s *StructLog) ErrorString() string {
// Note that reference types are actual VM data structures; make copies // Note that reference types are actual VM data structures; make copies
// if you need to retain them beyond the current call. // if you need to retain them beyond the current call.
type Tracer interface { type Tracer interface {
CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error CaptureStart(env *EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int)
CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, rData []byte, contract *Contract, depth int, err error) error CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, rData []byte, depth int, err error)
CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, depth int, err error)
CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error)
} }
// StructLogger is an EVM state logger and implements Tracer. // StructLogger is an EVM state logger and implements Tracer.
@ -139,17 +136,19 @@ func NewStructLogger(cfg *LogConfig) *StructLogger {
} }
// CaptureStart implements the Tracer interface to initialize the tracing operation. // CaptureStart implements the Tracer interface to initialize the tracing operation.
func (l *StructLogger) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error { func (l *StructLogger) CaptureStart(env *EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
return nil
} }
// CaptureState logs a new structured log message and pushes it out to the environment // CaptureState logs a new structured log message and pushes it out to the environment
// //
// CaptureState also tracks SLOAD/SSTORE ops to track storage change. // CaptureState also tracks SLOAD/SSTORE ops to track storage change.
func (l *StructLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, rData []byte, contract *Contract, depth int, err error) error { func (l *StructLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, rData []byte, depth int, err error) {
memory := scope.Memory
stack := scope.Stack
contract := scope.Contract
// check if already accumulated the specified number of logs // check if already accumulated the specified number of logs
if l.cfg.Limit != 0 && l.cfg.Limit <= len(l.logs) { if l.cfg.Limit != 0 && l.cfg.Limit <= len(l.logs) {
return errTraceLimitReached return
} }
// Copy a snapshot of the current memory state to a new buffer // Copy a snapshot of the current memory state to a new buffer
var mem []byte var mem []byte
@ -199,17 +198,15 @@ func (l *StructLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost ui
// create a new snapshot of the EVM. // create a new snapshot of the EVM.
log := StructLog{pc, op, gas, cost, mem, memory.Len(), stck, rdata, storage, depth, env.StateDB.GetRefund(), err} log := StructLog{pc, op, gas, cost, mem, memory.Len(), stck, rdata, storage, depth, env.StateDB.GetRefund(), err}
l.logs = append(l.logs, log) l.logs = append(l.logs, log)
return nil
} }
// CaptureFault implements the Tracer interface to trace an execution fault // CaptureFault implements the Tracer interface to trace an execution fault
// while running an opcode. // while running an opcode.
func (l *StructLogger) CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error { func (l *StructLogger) CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, depth int, err error) {
return nil
} }
// CaptureEnd is called after the call finishes to finalize the tracing. // CaptureEnd is called after the call finishes to finalize the tracing.
func (l *StructLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error { func (l *StructLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {
l.output = output l.output = output
l.err = err l.err = err
if l.cfg.Debug { if l.cfg.Debug {
@ -218,7 +215,6 @@ func (l *StructLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration
fmt.Printf(" error: %v\n", err) fmt.Printf(" error: %v\n", err)
} }
} }
return nil
} }
// StructLogs returns the captured log entries. // StructLogs returns the captured log entries.
@ -292,7 +288,7 @@ func NewMarkdownLogger(cfg *LogConfig, writer io.Writer) *mdLogger {
return l return l
} }
func (t *mdLogger) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error { func (t *mdLogger) CaptureStart(env *EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
if !create { if !create {
fmt.Fprintf(t.out, "From: `%v`\nTo: `%v`\nData: `0x%x`\nGas: `%d`\nValue `%v` wei\n", fmt.Fprintf(t.out, "From: `%v`\nTo: `%v`\nData: `0x%x`\nGas: `%d`\nValue `%v` wei\n",
from.String(), to.String(), from.String(), to.String(),
@ -307,10 +303,11 @@ func (t *mdLogger) CaptureStart(from common.Address, to common.Address, create b
| Pc | Op | Cost | Stack | RStack | Refund | | Pc | Op | Cost | Stack | RStack | Refund |
|-------|-------------|------|-----------|-----------|---------| |-------|-------------|------|-----------|-----------|---------|
`) `)
return nil
} }
func (t *mdLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, rData []byte, contract *Contract, depth int, err error) error { // CaptureState also tracks SLOAD/SSTORE ops to track storage change.
func (t *mdLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, rData []byte, depth int, err error) {
stack := scope.Stack
fmt.Fprintf(t.out, "| %4d | %10v | %3d |", pc, op, cost) fmt.Fprintf(t.out, "| %4d | %10v | %3d |", pc, op, cost)
if !t.cfg.DisableStack { if !t.cfg.DisableStack {
@ -327,18 +324,13 @@ func (t *mdLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64
if err != nil { if err != nil {
fmt.Fprintf(t.out, "Error: %v\n", err) fmt.Fprintf(t.out, "Error: %v\n", err)
} }
return nil
} }
func (t *mdLogger) CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error { func (t *mdLogger) CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, depth int, err error) {
fmt.Fprintf(t.out, "\nError: at pc=%d, op=%v: %v\n", pc, op, err) fmt.Fprintf(t.out, "\nError: at pc=%d, op=%v: %v\n", pc, op, err)
return nil
} }
func (t *mdLogger) CaptureEnd(output []byte, gasUsed uint64, tm time.Duration, err error) error { func (t *mdLogger) CaptureEnd(output []byte, gasUsed uint64, tm time.Duration, err error) {
fmt.Fprintf(t.out, "\nOutput: `0x%x`\nConsumed gas: `%d`\nError: `%v`\n", fmt.Fprintf(t.out, "\nOutput: `0x%x`\nConsumed gas: `%d`\nError: `%v`\n",
output, gasUsed, err) output, gasUsed, err)
return nil
} }

23
core/vm/logger_json.go
Unescape View File

@ -41,12 +41,16 @@ func NewJSONLogger(cfg *LogConfig, writer io.Writer) *JSONLogger {
return l return l
} }
func (l *JSONLogger) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error { func (l *JSONLogger) CaptureStart(env *EVM, from, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
return nil
} }
func (l *JSONLogger) CaptureFault(*EVM, uint64, OpCode, uint64, uint64, *ScopeContext, int, error) {}
// CaptureState outputs state information on the logger. // CaptureState outputs state information on the logger.
func (l *JSONLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, rData []byte, contract *Contract, depth int, err error) error { func (l *JSONLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint64, scope *ScopeContext, rData []byte, depth int, err error) {
memory := scope.Memory
stack := scope.Stack
log := StructLog{ log := StructLog{
Pc: pc, Pc: pc,
Op: op, Op: op,
@ -72,16 +76,11 @@ func (l *JSONLogger) CaptureState(env *EVM, pc uint64, op OpCode, gas, cost uint
if !l.cfg.DisableReturnData { if !l.cfg.DisableReturnData {
log.ReturnData = rData log.ReturnData = rData
} }
return l.encoder.Encode(log) l.encoder.Encode(log)
}
// CaptureFault outputs state information on the logger.
func (l *JSONLogger) CaptureFault(env *EVM, pc uint64, op OpCode, gas, cost uint64, memory *Memory, stack *Stack, contract *Contract, depth int, err error) error {
return nil
} }
// CaptureEnd is triggered at end of execution. // CaptureEnd is triggered at end of execution.
func (l *JSONLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error { func (l *JSONLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {
type endLog struct { type endLog struct {
Output string `json:"output"` Output string `json:"output"`
GasUsed math.HexOrDecimal64 `json:"gasUsed"` GasUsed math.HexOrDecimal64 `json:"gasUsed"`
@ -89,7 +88,7 @@ func (l *JSONLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration,
Err string `json:"error,omitempty"` Err string `json:"error,omitempty"`
} }
if err != nil { if err != nil {
return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, err.Error()}) l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, err.Error()})
} }
return l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, ""}) l.encoder.Encode(endLog{common.Bytes2Hex(output), math.HexOrDecimal64(gasUsed), t, ""})
} }

16
core/vm/logger_test.go
Unescape View File

@ -53,16 +53,20 @@ func TestStoreCapture(t *testing.T) {
var ( var (
env = NewEVM(BlockContext{}, TxContext{}, &dummyStatedb{}, params.TestChainConfig, Config{}) env = NewEVM(BlockContext{}, TxContext{}, &dummyStatedb{}, params.TestChainConfig, Config{})
logger = NewStructLogger(nil) logger = NewStructLogger(nil)
mem = NewMemory()
stack = newstack()
contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), 0) contract = NewContract(&dummyContractRef{}, &dummyContractRef{}, new(big.Int), 0)
scope = &ScopeContext{
Memory: NewMemory(),
Stack: newstack(),
Contract: contract,
}
) )
stack.push(uint256.NewInt().SetUint64(1)) scope.Stack.push(uint256.NewInt().SetUint64(1))
stack.push(uint256.NewInt()) scope.Stack.push(uint256.NewInt())
var index common.Hash var index common.Hash
logger.CaptureState(env, 0, SSTORE, 0, 0, mem, stack, nil, contract, 0, nil) logger.CaptureState(env, 0, SSTORE, 0, 0, scope, nil, 0, nil)
if len(logger.storage[contract.Address()]) == 0 { if len(logger.storage[contract.Address()]) == 0 {
t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(), len(logger.storage[contract.Address()])) t.Fatalf("expected exactly 1 changed value on address %x, got %d", contract.Address(),
len(logger.storage[contract.Address()]))
} }
exp := common.BigToHash(big.NewInt(1)) exp := common.BigToHash(big.NewInt(1))
if logger.storage[contract.Address()][index] != exp { if logger.storage[contract.Address()][index] != exp {

19
core/vm/runtime/runtime_test.go
Unescape View File

@ -326,23 +326,18 @@ type stepCounter struct {
steps int steps int
} }
func (s *stepCounter) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error { func (s *stepCounter) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
return nil
} }
func (s *stepCounter) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, rData []byte, contract *vm.Contract, depth int, err error) error { func (s *stepCounter) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
s.steps++
// Enable this for more output
//s.inner.CaptureState(env, pc, op, gas, cost, memory, stack, rStack, contract, depth, err)
return nil
} }
func (s *stepCounter) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error { func (s *stepCounter) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {}
return nil
}
func (s *stepCounter) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error { func (s *stepCounter) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
return nil s.steps++
// Enable this for more output
//s.inner.CaptureState(env, pc, op, gas, cost, memory, stack, rStack, contract, depth, err)
} }
// benchmarkNonModifyingCode benchmarks code, but if the code modifies the // benchmarkNonModifyingCode benchmarks code, but if the code modifies the

113
eth/tracers/tracer.go
Unescape View File

@ -287,8 +287,6 @@ func (cw *contractWrapper) pushObject(vm *duktape.Context) {
// Tracer provides an implementation of Tracer that evaluates a Javascript // Tracer provides an implementation of Tracer that evaluates a Javascript
// function for each VM execution step. // function for each VM execution step.
type Tracer struct { type Tracer struct {
inited bool // Flag whether the context was already inited from the EVM
vm *duktape.Context // Javascript VM instance vm *duktape.Context // Javascript VM instance
tracerObject int // Stack index of the tracer JavaScript object tracerObject int // Stack index of the tracer JavaScript object
@ -529,7 +527,7 @@ func wrapError(context string, err error) error {
} }
// CaptureStart implements the Tracer interface to initialize the tracing operation. // CaptureStart implements the Tracer interface to initialize the tracing operation.
func (jst *Tracer) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error { func (jst *Tracer) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
jst.ctx["type"] = "CALL" jst.ctx["type"] = "CALL"
if create { if create {
jst.ctx["type"] = "CREATE" jst.ctx["type"] = "CREATE"
@ -540,77 +538,67 @@ func (jst *Tracer) CaptureStart(from common.Address, to common.Address, create b
jst.ctx["gas"] = gas jst.ctx["gas"] = gas
jst.ctx["value"] = value jst.ctx["value"] = value
return nil // Initialize the context
jst.ctx["block"] = env.Context.BlockNumber.Uint64()
jst.dbWrapper.db = env.StateDB
// Compute intrinsic gas
isHomestead := env.ChainConfig().IsHomestead(env.Context.BlockNumber)
isIstanbul := env.ChainConfig().IsIstanbul(env.Context.BlockNumber)
intrinsicGas, err := core.IntrinsicGas(input, nil, jst.ctx["type"] == "CREATE", isHomestead, isIstanbul)
if err != nil {
return
}
jst.ctx["intrinsicGas"] = intrinsicGas
} }
// CaptureState implements the Tracer interface to trace a single step of VM execution. // CaptureState implements the Tracer interface to trace a single step of VM execution.
func (jst *Tracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, rdata []byte, contract *vm.Contract, depth int, err error) error { func (jst *Tracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, rData []byte, depth int, err error) {
if jst.err == nil { if jst.err != nil {
// Initialize the context if it wasn't done yet return
if !jst.inited { }
jst.ctx["block"] = env.Context.BlockNumber.Uint64() // If tracing was interrupted, set the error and stop
// Compute intrinsic gas if atomic.LoadUint32(&jst.interrupt) > 0 {
isHomestead := env.ChainConfig().IsHomestead(env.Context.BlockNumber) jst.err = jst.reason
isIstanbul := env.ChainConfig().IsIstanbul(env.Context.BlockNumber) return
var input []byte }
if data, ok := jst.ctx["input"].([]byte); ok { jst.opWrapper.op = op
input = data jst.stackWrapper.stack = scope.Stack
} jst.memoryWrapper.memory = scope.Memory
intrinsicGas, err := core.IntrinsicGas(input, nil, jst.ctx["type"] == "CREATE", isHomestead, isIstanbul) jst.contractWrapper.contract = scope.Contract
if err != nil {
return err *jst.pcValue = uint(pc)
} *jst.gasValue = uint(gas)
jst.ctx["intrinsicGas"] = intrinsicGas *jst.costValue = uint(cost)
jst.inited = true *jst.depthValue = uint(depth)
} *jst.refundValue = uint(env.StateDB.GetRefund())
// If tracing was interrupted, set the error and stop
if atomic.LoadUint32(&jst.interrupt) > 0 { jst.errorValue = nil
jst.err = jst.reason if err != nil {
return nil jst.errorValue = new(string)
} *jst.errorValue = err.Error()
jst.opWrapper.op = op }
jst.stackWrapper.stack = stack
jst.memoryWrapper.memory = memory if _, err := jst.call("step", "log", "db"); err != nil {
jst.contractWrapper.contract = contract jst.err = wrapError("step", err)
jst.dbWrapper.db = env.StateDB
*jst.pcValue = uint(pc)
*jst.gasValue = uint(gas)
*jst.costValue = uint(cost)
*jst.depthValue = uint(depth)
*jst.refundValue = uint(env.StateDB.GetRefund())
jst.errorValue = nil
if err != nil {
jst.errorValue = new(string)
*jst.errorValue = err.Error()
}
_, err := jst.call("step", "log", "db")
if err != nil {
jst.err = wrapError("step", err)
}
} }
return nil
} }
// CaptureFault implements the Tracer interface to trace an execution fault // CaptureFault implements the Tracer interface to trace an execution fault
// while running an opcode. func (jst *Tracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, scope *vm.ScopeContext, depth int, err error) {
func (jst *Tracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error { if jst.err != nil {
if jst.err == nil { return
// Apart from the error, everything matches the previous invocation }
jst.errorValue = new(string) // Apart from the error, everything matches the previous invocation
*jst.errorValue = err.Error() jst.errorValue = new(string)
*jst.errorValue = err.Error()
_, err := jst.call("fault", "log", "db") if _, err := jst.call("fault", "log", "db"); err != nil {
if err != nil { jst.err = wrapError("fault", err)
jst.err = wrapError("fault", err)
}
} }
return nil
} }
// CaptureEnd is called after the call finishes to finalize the tracing. // CaptureEnd is called after the call finishes to finalize the tracing.
func (jst *Tracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error { func (jst *Tracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) {
jst.ctx["output"] = output jst.ctx["output"] = output
jst.ctx["time"] = t.String() jst.ctx["time"] = t.String()
jst.ctx["gasUsed"] = gasUsed jst.ctx["gasUsed"] = gasUsed
@ -618,7 +606,6 @@ func (jst *Tracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, er
if err != nil { if err != nil {
jst.ctx["error"] = err.Error() jst.ctx["error"] = err.Error()
} }
return nil
} }
// GetResult calls the Javascript 'result' function and returns its value, or any accumulated error // GetResult calls the Javascript 'result' function and returns its value, or any accumulated error

52
eth/tracers/tracer_test.go
Unescape View File

@ -47,7 +47,8 @@ type dummyStatedb struct {
state.StateDB state.StateDB
} }
func (*dummyStatedb) GetRefund() uint64 { return 1337 } func (*dummyStatedb) GetRefund() uint64 { return 1337 }
func (*dummyStatedb) GetBalance(addr common.Address) *big.Int { return new(big.Int) }
type vmContext struct { type vmContext struct {
blockCtx vm.BlockContext blockCtx vm.BlockContext
@ -67,7 +68,7 @@ func runTrace(tracer *Tracer, vmctx *vmContext) (json.RawMessage, error) {
contract := vm.NewContract(account{}, account{}, value, startGas) contract := vm.NewContract(account{}, account{}, value, startGas)
contract.Code = []byte{byte(vm.PUSH1), 0x1, byte(vm.PUSH1), 0x1, 0x0} contract.Code = []byte{byte(vm.PUSH1), 0x1, byte(vm.PUSH1), 0x1, 0x0}
tracer.CaptureStart(contract.Caller(), contract.Address(), false, []byte{}, startGas, value) tracer.CaptureStart(env, contract.Caller(), contract.Address(), false, []byte{}, startGas, value)
ret, err := env.Interpreter().Run(contract, []byte{}, false) ret, err := env.Interpreter().Run(contract, []byte{}, false)
tracer.CaptureEnd(ret, startGas-contract.Gas, 1, err) tracer.CaptureEnd(ret, startGas-contract.Gas, 1, err)
if err != nil { if err != nil {
@ -150,14 +151,55 @@ func TestHaltBetweenSteps(t *testing.T) {
t.Fatal(err) t.Fatal(err)
} }
env := vm.NewEVM(vm.BlockContext{BlockNumber: big.NewInt(1)}, vm.TxContext{}, &dummyStatedb{}, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer}) env := vm.NewEVM(vm.BlockContext{BlockNumber: big.NewInt(1)}, vm.TxContext{}, &dummyStatedb{}, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer})
contract := vm.NewContract(&account{}, &account{}, big.NewInt(0), 0) scope := &vm.ScopeContext{
Contract: vm.NewContract(&account{}, &account{}, big.NewInt(0), 0),
}
tracer.CaptureState(env, 0, 0, 0, 0, nil, nil, nil, contract, 0, nil) tracer.CaptureState(env, 0, 0, 0, 0, scope, nil, 0, nil)
timeout := errors.New("stahp") timeout := errors.New("stahp")
tracer.Stop(timeout) tracer.Stop(timeout)
tracer.CaptureState(env, 0, 0, 0, 0, nil, nil, nil, contract, 0, nil) tracer.CaptureState(env, 0, 0, 0, 0, scope, nil, 0, nil)
if _, err := tracer.GetResult(); err.Error() != timeout.Error() { if _, err := tracer.GetResult(); err.Error() != timeout.Error() {
t.Errorf("Expected timeout error, got %v", err) t.Errorf("Expected timeout error, got %v", err)
} }
} }
// TestNoStepExec tests a regular value transfer (no exec), and accessing the statedb
// in 'result'
func TestNoStepExec(t *testing.T) {
runEmptyTrace := func(tracer *Tracer, vmctx *vmContext) (json.RawMessage, error) {
env := vm.NewEVM(vmctx.blockCtx, vmctx.txCtx, &dummyStatedb{}, params.TestChainConfig, vm.Config{Debug: true, Tracer: tracer})
startGas := uint64(10000)
contract := vm.NewContract(account{}, account{}, big.NewInt(0), startGas)
tracer.CaptureStart(env, contract.Caller(), contract.Address(), false, []byte{}, startGas, big.NewInt(0))
tracer.CaptureEnd(nil, startGas-contract.Gas, 1, nil)
return tracer.GetResult()
}
execTracer := func(code string) []byte {
t.Helper()
ctx := &vmContext{blockCtx: vm.BlockContext{BlockNumber: big.NewInt(1)}, txCtx: vm.TxContext{GasPrice: big.NewInt(100000)}}
tracer, err := New(code, ctx.txCtx)
if err != nil {
t.Fatal(err)
}
ret, err := runEmptyTrace(tracer, ctx)
if err != nil {
t.Fatal(err)
}
return ret
}
for i, tt := range []struct {
code string
want string
}{
{ // tests that we don't panic on accessing the db methods
code: "{depths: [], step: function() {}, fault: function() {}, result: function(ctx, db){ return db.getBalance(ctx.to)} }",
want: `"0"`,
},
} {
if have := execTracer(tt.code); tt.want != string(have) {
t.Errorf("testcase %d: expected return value to be %s got %s\n\tcode: %v", i, tt.want, string(have), tt.code)
}
}
}

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