nimbus-eth1/tests/macro_assembler.nim

364 lines
11 KiB
Nim

import
macrocache, strutils, sequtils, unittest2, times,
stew/byteutils, chronicles, eth/[common, keys],
stew/shims/macros
import
options, eth/trie/[db, hexary],
../nimbus/db/[db_chain, accounts_cache],
../nimbus/vm_internals, ../nimbus/forks,
../nimbus/transaction/call_evm,
../nimbus/[transaction, chain_config, genesis, vm_types, vm_state],
../nimbus/utils/difficulty
export byteutils
{.experimental: "dynamicBindSym".}
# backported from Nim 0.19.9
# remove this when we use newer Nim
proc newLitFixed*(arg: enum): NimNode {.compileTime.} =
result = newCall(
arg.type.getTypeInst[1],
newLit(int(arg))
)
type
VMWord* = array[32, byte]
Storage* = tuple[key, val: VMWord]
Assembler* = object
title*: string
stack*: seq[VMWord]
memory*: seq[VMWord]
storage*: seq[Storage]
code*: seq[byte]
logs*: seq[Log]
success*: bool
gasLimit*: GasInt
gasUsed*: GasInt
data*: seq[byte]
output*: seq[byte]
fork*: Fork
const
idToOpcode = CacheTable"NimbusMacroAssembler"
static:
for n in Op:
idToOpcode[$n] = newLit(ord(n))
# EIP-4399 new opcode
idToOpcode["PrevRandao"] = newLit(ord(Difficulty))
proc validateVMWord(val: string, n: NimNode): VMWord =
if val.len <= 2 or val.len > 66: error("invalid hex string", n)
if not (val[0] == '0' and val[1] == 'x'): error("invalid hex string", n)
let zerosLen = 64 - (val.len - 2)
let value = repeat('0', zerosLen) & val.substr(2)
hexToByteArray(value, result)
proc validateVMWord(val: NimNode): VMWord =
val.expectKind(nnkStrLit)
validateVMWord(val.strVal, val)
proc parseVMWords(list: NimNode): seq[VMWord] =
result = @[]
list.expectKind nnkStmtList
for val in list:
result.add validateVMWord(val)
proc validateStorage(val: NimNode): Storage =
val.expectKind(nnkCall)
val[0].expectKind(nnkStrLit)
val[1].expectKind(nnkStmtList)
doAssert(val[1].len == 1)
val[1][0].expectKind(nnkStrLit)
result = (validateVMWord(val[0]), validateVMWord(val[1][0]))
proc parseStorage(list: NimNode): seq[Storage] =
result = @[]
list.expectKind nnkStmtList
for val in list:
result.add validateStorage(val)
proc parseSuccess(list: NimNode): bool =
list.expectKind nnkStmtList
list[0].expectKind(nnkIdent)
$list[0] == "true"
proc parseData(list: NimNode): seq[byte] =
result = @[]
list.expectKind nnkStmtList
for n in list:
n.expectKind(nnkStrLit)
result.add hexToSeqByte(n.strVal)
proc parseLog(node: NimNode): Log =
node.expectKind(nnkPar)
for item in node:
item.expectKind(nnkExprColonExpr)
let label = item[0].strVal
let body = item[1]
case label.normalize
of "address":
body.expectKind(nnkStrLit)
let value = body.strVal
if value.len < 20:
error("bad address format", body)
hexToByteArray(value, result.address)
of "topics":
body.expectKind(nnkBracket)
for x in body:
result.topics.add validateVMWord(x.strVal, x)
of "data":
result.data = hexToSeqByte(body.strVal)
else:error("unknown log section '" & label & "'", item[0])
proc parseLogs(list: NimNode): seq[Log] =
result = @[]
list.expectKind nnkStmtList
for n in list:
result.add parseLog(n)
proc validateOpcode(sym: NimNode) =
let typ = getTypeInst(sym)
typ.expectKind(nnkSym)
if $typ != "Op":
error("unknown opcode '" & $sym & "'", sym)
proc addOpCode(code: var seq[byte], node, params: NimNode) =
node.expectKind nnkSym
let opcode = Op(idToOpcode[node.strVal].intVal)
case opcode
of Push1..Push32:
if params.len != 1:
error("expect 1 param, but got " & $params.len, node)
let paramWidth = (opcode.ord - 95) * 2
params[0].expectKind nnkStrLit
var val = params[0].strVal
if val[0] == '0' and val[1] == 'x':
val = val.substr(2)
if val.len != paramWidth:
error("expected param with " & $paramWidth & " hex digits, got " & $val.len, node)
code.add byte(opcode)
code.add hexToSeqByte(val)
else:
error("invalid hex format", node)
else:
if params.len > 0:
error("there should be no param for this instruction", node)
code.add byte(opcode)
proc parseCode(codes: NimNode): seq[byte] =
let emptyNode = newEmptyNode()
codes.expectKind nnkStmtList
for pc, line in codes:
line.expectKind({nnkCommand, nnkIdent, nnkStrLit})
if line.kind == nnkStrLit:
result.add hexToSeqByte(line.strVal)
elif line.kind == nnkIdent:
let sym = bindSym(line)
validateOpcode(sym)
result.addOpCode(sym, emptyNode)
elif line.kind == nnkCommand:
let sym = bindSym(line[0])
validateOpcode(sym)
var params = newNimNode(nnkBracket)
for i in 1 ..< line.len:
params.add line[i]
result.addOpCode(sym, params)
else:
error("unknown syntax: " & line.toStrLit.strVal, line)
proc parseFork(fork: NimNode): Fork =
fork[0].expectKind({nnkIdent, nnkStrLit})
# Normalise whitespace and capitalize each word because `parseEnum` matches
# enum string values not symbols, and the strings are capitalized in `Fork`.
parseEnum[Fork](fork[0].strVal.splitWhitespace().map(capitalizeAscii).join(" "))
proc parseGasUsed(gas: NimNode): GasInt =
gas[0].expectKind(nnkIntLit)
result = gas[0].intVal
proc generateVMProxy(boa: Assembler): NimNode =
let
vmProxy = genSym(nskProc, "vmProxy")
chainDB = ident("chainDB")
vmState = ident("vmState")
title = boa.title
body = newLitFixed(boa)
result = quote do:
test `title`:
proc `vmProxy`(): bool =
let boa = `body`
runVM(`vmState`, `chainDB`, boa)
{.gcsafe.}:
check `vmProxy`()
when defined(macro_assembler_debug):
echo result.toStrLit.strVal
proc initDatabase*(networkId = MainNet): (BaseVMState, BaseChainDB) =
let db = newBaseChainDB(newMemoryDB(), false, networkId, networkParams(networkId))
initializeEmptyDb(db)
let
parent = getCanonicalHead(db)
coinbase = hexToByteArray[20]("bb7b8287f3f0a933474a79eae42cbca977791171")
timestamp = parent.timestamp + initDuration(seconds = 1)
header = BlockHeader(
blockNumber: 1.u256,
stateRoot: parent.stateRoot,
parentHash: parent.blockHash,
coinbase: coinbase,
timestamp: timestamp,
difficulty: db.config.calcDifficulty(timestamp, parent),
gasLimit: 100_000
)
vmState = BaseVMState.new(header, db)
(vmState, db)
proc runVM*(vmState: BaseVMState, chainDB: BaseChainDB, boa: Assembler): bool =
const codeAddress = hexToByteArray[20]("460121576cc7df020759730751f92bd62fd78dd6")
let privateKey = PrivateKey.fromHex("7a28b5ba57c53603b0b07b56bba752f7784bf506fa95edc395f5cf6c7514fe9d")[]
vmState.mutateStateDB:
db.setCode(codeAddress, boa.code)
db.setBalance(codeAddress, 1_000_000.u256)
let unsignedTx = Transaction(
txType: TxLegacy,
nonce: 0,
gasPrice: 1.GasInt,
gasLimit: 500_000_000.GasInt,
to: codeAddress.some,
value: 500.u256,
payload: boa.data
)
let tx = signTransaction(unsignedTx, privateKey, chainDB.config.chainId, false)
let asmResult = testCallEvm(tx, tx.getSender, vmState, boa.fork)
if not asmResult.isError:
if boa.success == false:
error "different success value", expected=boa.success, actual=true
return false
else:
if boa.success == true:
error "different success value", expected=boa.success, actual=false
return false
if boa.gasUsed != -1:
if boa.gasUsed != asmResult.gasUsed:
error "different gasUsed", expected=boa.gasUsed, actual=asmResult.gasUsed
return false
if boa.stack.len != asmResult.stack.values.len:
error "different stack len", expected=boa.stack.len, actual=asmResult.stack.values.len
return false
for i, v in asmResult.stack.values:
let actual = v.dumpHex()
let val = boa.stack[i].toHex()
if actual != val:
error "different stack value", idx=i, expected=val, actual=actual
return false
const chunkLen = 32
let numChunks = asmResult.memory.len div chunkLen
if numChunks != boa.memory.len:
error "different memory len", expected=boa.memory.len, actual=numChunks
return false
for i in 0 ..< numChunks:
let actual = asmResult.memory.bytes.toOpenArray(i * chunkLen, (i + 1) * chunkLen - 1).toHex()
let mem = boa.memory[i].toHex()
if mem != actual:
error "different memory value", idx=i, expected=mem, actual=actual
return false
var stateDB = vmState.stateDB
stateDB.persist()
var
storageRoot = stateDB.getStorageRoot(codeAddress)
trie = initSecureHexaryTrie(chainDB.db, storageRoot)
for kv in boa.storage:
let key = kv[0].toHex()
let val = kv[1].toHex()
let keyBytes = (@(kv[0]))
let actual = trie.get(keyBytes).toHex()
let zerosLen = 64 - (actual.len)
let value = repeat('0', zerosLen) & actual
if val != value:
error "storage has different value", key=key, expected=val, actual=value
return false
let logs = vmState.logEntries
if logs.len != boa.logs.len:
error "different logs len", expected=boa.logs.len, actual=logs.len
return false
for i, log in boa.logs:
let eAddr = log.address.toHex()
let aAddr = logs[i].address.toHex()
if eAddr != aAddr:
error "different address", expected=eAddr, actual=aAddr, idx=i
return false
let eData = log.data.toHex()
let aData = logs[i].data.toHex()
if eData != aData:
error "different data", expected=eData, actual=aData, idx=i
return false
if log.topics.len != logs[i].topics.len:
error "different topics len", expected=log.topics.len, actual=logs[i].topics.len, idx=i
return false
for x, t in log.topics:
let eTopic = t.toHex()
let aTopic = logs[i].topics[x].toHex()
if eTopic != aTopic:
error "different topic in log entry", expected=eTopic, actual=aTopic, logIdx=i, topicIdx=x
return false
if boa.output.len > 0:
let actual = asmResult.output.toHex()
let expected = boa.output.toHex()
if expected != actual:
error "different output detected", expected=expected, actual=actual
return false
result = true
macro assembler*(list: untyped): untyped =
var boa = Assembler(success: true, fork: FkFrontier, gasUsed: -1)
list.expectKind nnkStmtList
for callSection in list:
callSection.expectKind(nnkCall)
let label = callSection[0].strVal
let body = callSection[1]
case label.normalize
of "title":
let title = body[0]
title.expectKind(nnkStrLit)
boa.title = title.strVal
of "code" : boa.code = parseCode(body)
of "memory": boa.memory = parseVMWords(body)
of "stack" : boa.stack = parseVMWords(body)
of "storage": boa.storage = parseStorage(body)
of "logs": boa.logs = parseLogs(body)
of "success": boa.success = parseSuccess(body)
of "data": boa.data = parseData(body)
of "output": boa.output = parseData(body)
of "fork": boa.fork = parseFork(body)
of "gasused": boa.gasUsed = parseGasUsed(body)
else: error("unknown section '" & label & "'", callSection[0])
result = boa.generateVMProxy()
macro evmByteCode*(list: untyped): untyped =
list.expectKind nnkStmtList
var code = parseCode(list)
result = newLitFixed(code)