mirror of
https://github.com/status-im/nimbus-eth1.git
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b3cb51e89e
The EVM stack is a hot spot in EVM execution and we end up paying a nim seq tax in several ways, adding up to ~5% of execution time: * on initial allocation, all bytes get zeroed - this means we have to choose between allocating a full stack or just a partial one and then growing it * pushing and popping introduce additional zeroing * reallocations on growth copy + zero - expensive again! * redundant range checking on every operation reducing inlining etc Here a custom stack using C memory is instroduced: * no zeroing on allocation * full stack allocated on EVM startup -> no reallocation during execution * fast push/pop - no zeroing again * 32-byte alignment - this makes it easier for the compiler to use vector instructions * no stack allocated for precompiles (these never use it anyway) Of course, this change also means we have to manage memory manually - for the EVM, this turns out to be not too bad because we already manage database transactions the same way (they have to be freed "manually") so we can simply latch on to this mechanism. While we're at it, this PR also skips database lookup for known precompiles by resolving such addresses earlier.
180 lines
5.2 KiB
Nim
180 lines
5.2 KiB
Nim
# Nimbus
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# Copyright (c) 2018-2024 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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## EVM Opcode Handlers: Block Data
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## ===============================
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##
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{.push raises: [].}
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import
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eth/common,
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../../computation,
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../../stack,
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../../evm_errors,
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../utils/utils_numeric,
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../op_codes,
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./oph_defs
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when not defined(evmc_enabled):
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import ../../state
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# ------------------------------------------------------------------------------
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# Private, op handlers implementation
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# ------------------------------------------------------------------------------
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proc blockhashOp(cpt: VmCpt): EvmResultVoid =
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## 0x40, Get the hash of one of the 256 most recent complete blocks.
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template block256(top, number, conv) =
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if number > high(BlockNumber).u256:
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conv(zero(UInt256), top)
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else:
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conv(cpt.getBlockHash(number.truncate(BlockNumber)), top)
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cpt.stack.unaryWithTop(block256)
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proc coinBaseOp(cpt: VmCpt): EvmResultVoid =
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## 0x41, Get the block's beneficiary address.
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cpt.stack.push cpt.getCoinbase
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proc timestampOp(cpt: VmCpt): EvmResultVoid =
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## 0x42, Get the block's timestamp.
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cpt.stack.push cpt.getTimestamp
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proc blocknumberOp(cpt: VmCpt): EvmResultVoid =
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## 0x43, Get the block's number.
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cpt.stack.push cpt.getBlockNumber
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proc difficultyOp(cpt: VmCpt): EvmResultVoid =
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## 0x44, Get the block's difficulty
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cpt.stack.push cpt.getDifficulty
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proc gasLimitOp(cpt: VmCpt): EvmResultVoid =
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## 0x45, Get the block's gas limit
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cpt.stack.push cpt.getGasLimit
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proc chainIdOp(cpt: VmCpt): EvmResultVoid =
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## 0x46, Get current chain’s EIP-155 unique identifier.
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cpt.stack.push cpt.getChainId
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proc selfBalanceOp(cpt: VmCpt): EvmResultVoid =
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## 0x47, Get current contract's balance.
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cpt.stack.push cpt.getBalance(cpt.msg.contractAddress)
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proc baseFeeOp(cpt: VmCpt): EvmResultVoid =
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## 0x48, Get the block's base fee.
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cpt.stack.push cpt.getBaseFee
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proc blobHashOp(cpt: VmCpt): EvmResultVoid =
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## 0x49, Get current transaction's EIP-4844 versioned hash.
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template blob256(top, number, conv) =
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let
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index = number.safeInt
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len = cpt.getVersionedHashesLen
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if index < len:
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conv(cpt.getVersionedHash(index).data, top)
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else:
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conv(zero(UInt256), top)
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cpt.stack.unaryWithTop(blob256)
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proc blobBaseFeeOp(cpt: VmCpt): EvmResultVoid =
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## 0x4a, Get the block's base fee.
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cpt.stack.push cpt.getBlobBaseFee
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# ------------------------------------------------------------------------------
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# Public, op exec table entries
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# ------------------------------------------------------------------------------
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const
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VmOpExecBlockData*: seq[VmOpExec] = @[
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(opCode: Blockhash, ## 0x40, Hash of some most recent complete block
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forks: VmOpAllForks,
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name: "blockhash",
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info: "Get the hash of one of the 256 most recent complete blocks",
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exec: blockhashOp),
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(opCode: Coinbase, ## 0x41, Beneficiary address
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forks: VmOpAllForks,
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name: "coinbase",
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info: "Get the block's beneficiary address",
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exec: coinBaseOp),
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(opCode: Timestamp, ## 0x42, Block timestamp.
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forks: VmOpAllForks,
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name: "timestamp",
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info: "Get the block's timestamp",
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exec: timestampOp),
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(opCode: Number, ## 0x43, Block number
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forks: VmOpAllForks,
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name: "blockNumber",
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info: "Get the block's number",
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exec: blocknumberOp),
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(opCode: Difficulty, ## 0x44, Block difficulty
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forks: VmOpAllForks,
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name: "difficulty",
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info: "Get the block's difficulty",
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exec: difficultyOp),
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(opCode: GasLimit, ## 0x45, Block gas limit
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forks: VmOpAllForks,
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name: "gasLimit",
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info: "Get the block's gas limit",
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exec: gasLimitOp),
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(opCode: ChainIdOp, ## 0x46, EIP-155 chain identifier
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forks: VmOpIstanbulAndLater,
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name: "chainId",
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info: "Get current chain’s EIP-155 unique identifier",
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exec: chainIdOp),
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(opCode: SelfBalance, ## 0x47, Contract balance.
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forks: VmOpIstanbulAndLater,
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name: "selfBalance",
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info: "Get current contract's balance",
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exec: selfBalanceOp),
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(opCode: BaseFee, ## 0x48, EIP-1559 Block base fee.
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forks: VmOpLondonAndLater,
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name: "baseFee",
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info: "Get current block's EIP-1559 base fee",
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exec: baseFeeOp),
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(opCode: BlobHash, ## 0x49, EIP-4844 Transaction versioned hash
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forks: VmOpCancunAndLater,
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name: "blobHash",
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info: "Get current transaction's EIP-4844 versioned hash",
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exec: blobHashOp),
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(opCode: BlobBaseFee, ## 0x4a, EIP-7516 Returns the current data-blob base-fee
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forks: VmOpCancunAndLater,
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name: "blobBaseFee",
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info: "Returns the current data-blob base-fee",
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exec: blobBaseFeeOp)]
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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