mirror of
https://github.com/status-im/nimbus-eth1.git
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e040e2671a
* Added basic async capabilities for vm2. This is a whole new Git branch, not the same one as last time (https://github.com/status-im/nimbus-eth1/pull/1250) - there wasn't much worth salvaging. Main differences: I didn't do the "each opcode has to specify an async handler" junk that I put in last time. Instead, in oph_memory.nim you can see sloadOp calling asyncChainTo and passing in an async operation. That async operation is then run by the execCallOrCreate (or asyncExecCallOrCreate) code in interpreter_dispatch.nim. In the test code, the (previously existing) macro called "assembler" now allows you to add a section called "initialStorage", specifying fake data to be used by the EVM computation run by that test. (In the long run we'll obviously want to write tests that for-real use the JSON-RPC API to asynchronously fetch data; for now, this was just an expedient way to write a basic unit test that exercises the async-EVM code pathway.) There's also a new macro called "concurrentAssemblers" that allows you to write a test that runs multiple assemblers concurrently (and then waits for them all to finish). There's one example test using this, in test_op_memory_lazy.nim, though you can't actually see it doing so unless you uncomment some echo statements in async_operations.nim (in which case you can see the two concurrently running EVM computations each printing out what they're doing, and you'll see that they interleave). A question: is it possible to make EVMC work asynchronously? (For now, this code compiles and "make test" passes even if ENABLE_EVMC is turned on, but it doesn't actually work asynchronously, it just falls back on doing the usual synchronous EVMC thing. See FIXME-asyncAndEvmc.) * Moved the AsyncOperationFactory to the BaseVMState object. * Made the AsyncOperationFactory into a table of fn pointers. Also ditched the plain-data Vm2AsyncOperation type; it wasn't really serving much purpose. Instead, the pendingAsyncOperation field directly contains the Future. * Removed the hasStorage idea. It's not the right solution to the "how do we know whether we still need to fetch the storage value or not?" problem. I haven't implemented the right solution yet, but at least we're better off not putting in a wrong one. * Added/modified/removed some comments. (Based on feedback on the PR.) * Removed the waitFor from execCallOrCreate. There was some back-and-forth in the PR regarding whether nested waitFor calls are acceptable: https://github.com/status-im/nimbus-eth1/pull/1260#discussion_r998587449 The eventual decision was to just change the waitFor to a doAssert (since we probably won't want this extra functionality when running synchronously anyway) to make sure that the Future is already finished.
140 lines
4.1 KiB
Nim
140 lines
4.1 KiB
Nim
# Nimbus
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# Copyright (c) 2018 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or distributed except
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# according to those terms.
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import
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tables, eth/common,
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options, json, sets,
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chronos, stint,
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json_rpc/rpcclient,
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./stack, ./memory, ./code_stream, ../forks,
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./interpreter/[gas_costs, op_codes],
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# TODO - will be hidden at a lower layer
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../db/[db_chain, accounts_cache]
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when defined(evmc_enabled):
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import
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./evmc_api
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# Select between small-stack recursion and no recursion. Both are good, fast,
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# low resource using methods. Keep both here because true EVMC API requires
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# the small-stack method, but Chronos `async` is better without recursion.
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const vm_use_recursion* = defined(evmc_enabled)
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type
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VMFlag* = enum
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ExecutionOK
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GenerateWitness
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ClearCache
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BaseVMState* = ref object of RootObj
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prevHeaders* : seq[BlockHeader]
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chainDB* : BaseChainDB
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parent* : BlockHeader
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timestamp* : EthTime
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gasLimit* : GasInt
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fee* : Option[UInt256]
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prevRandao* : Hash256
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blockDifficulty*: UInt256
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ttdReached* : bool
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name* : string
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flags* : set[VMFlag]
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tracer* : TransactionTracer
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logEntries* : seq[Log]
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receipts* : seq[Receipt]
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stateDB* : AccountsCache
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cumulativeGasUsed*: GasInt
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touchedAccounts*: HashSet[EthAddress]
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selfDestructs* : HashSet[EthAddress]
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txOrigin* : EthAddress
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txGasPrice* : GasInt
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gasCosts* : GasCosts
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fork* : Fork
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minerAddress* : EthAddress
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asyncFactory* : AsyncOperationFactory
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TracerFlags* {.pure.} = enum
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EnableTracing
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DisableStorage
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DisableMemory
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DisableStack
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DisableState
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DisableStateDiff
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EnableAccount
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DisableReturnData
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TransactionTracer* = object
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trace*: JsonNode
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flags*: set[TracerFlags]
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accounts*: HashSet[EthAddress]
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storageKeys*: seq[HashSet[UInt256]]
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Computation* = ref object
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# The execution computation
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vmState*: BaseVMState
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msg*: Message
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memory*: Memory
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stack*: Stack
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returnStack*: seq[int]
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gasMeter*: GasMeter
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code*: CodeStream
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output*: seq[byte]
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returnData*: seq[byte]
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error*: Error
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touchedAccounts*: HashSet[EthAddress]
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selfDestructs*: HashSet[EthAddress]
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logEntries*: seq[Log]
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savePoint*: SavePoint
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instr*: Op
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opIndex*: int
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when defined(evmc_enabled):
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host*: HostContext
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child*: ref nimbus_message
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res*: nimbus_result
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else:
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parent*, child*: Computation
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pendingAsyncOperation*: Future[void]
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continuation*: proc() {.gcsafe.}
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Error* = ref object
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info*: string
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burnsGas*: bool
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GasMeter* = object
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gasRefunded*: GasInt
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gasRemaining*: GasInt
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CallKind* = enum
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evmcCall = 0, # CALL
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evmcDelegateCall = 1, # DELEGATECALL
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evmcCallCode = 2, # CALLCODE
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evmcCreate = 3, # CREATE
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evmcCreate2 = 4 # CREATE2
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MsgFlags* = enum
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emvcNoFlags = 0
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emvcStatic = 1
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Message* = ref object
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kind*: CallKind
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depth*: int
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gas*: GasInt
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sender*: EthAddress
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contractAddress*: EthAddress
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codeAddress*: EthAddress
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value*: UInt256
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data*: seq[byte]
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flags*: MsgFlags
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LazyDataSource* = ref object of RootObj
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ifNecessaryGetStorage*: proc(c: Computation, slot: UInt256): Future[void] {.gcsafe.}
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AsyncOperationFactory* = ref object of RootObj
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lazyDataSource*: LazyDataSource
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